CN102963679B - Silent Conveyor Chain Scraper - Google Patents

Abstract

The invention relates to a noise-dampened conveyor chain flight. A conveyor flight for a chain comprising: at least two spaced apart connectors; and two side plates connecting the connectors, each side plate including two spaced apart elongated pins extending therefrom. The flight includes a metal support and the metal support includes two spaced apart cylindrical portions adapted to receive the two spaced apart elongated pins. The squeegee also includes a flexible housing surrounding the metal support.

Description

Silent Conveyor Chain Scraper

related application

This application is a continuation-in-part of previously co-pending US Application No. 12/433,332, filed April 30, 2009, the entire contents of which are hereby incorporated by reference.

technical field

The present invention relates to chain scraper conveyors for use in conveying material in the mining industry, and in particular to improved designs for chain scraper conveyors. More specifically, the present invention relates to conveyor chains for continuous mining machines and chain transport units.

Background technique

Conveyor flights with various coverings have been tried in the past. The main reason for these coverings is for noise control. While overlays have been shown to reduce conveyor noise by 5-10 dBA, these materials wear the blades relatively quickly and were determined not to be of sufficient commercial use on continuous miners or longwall equipment. Overlays are compressed beyond their working limits and begin to tear and fall off. One of the reasons for this failure is that the cover layer is too thin. With the scraper bars, there is a limited amount of space available on the conveyor, so the integrity of the existing scraper is compromised for thicker cover.

Polyurethane coverings on conveyor chain scrapers have proven effective in reducing noise exposure in continuous mining machines. Widely accepted issues preventing this solution include the cost of implementing and maintaining the chain, the durability of the polyurethane covering, etc.

The most successful polyurethane-covered flight design to date is the standard forged steel conveyor flight, which is machined to reduce its thickness and thus make room for the polyurethane covering. The machined scraper is then used as the scraper core, which is encapsulated in a polyurethane cover. However, the cover was thinner than desired, and the corners of the steel blades caused stress concentrations on the polyurethane cover. The end of the scraper closest to the chain is now enlarged and has holes for fitting the chain pins. Due to the enlarged end of the blade, the polyurethane cover is undesirably thin.

The scraper core is integrally welded to the chain scraper section which is part of the chain assembly. Replacing the blades due to wear and tear of the polyurethane cover is expensive and difficult. If quite a few scrapers have lost their polyurethane covering, it is not economical to repair the chain and the entire chain has to be replaced.

Contents of the invention

An independent object of the present disclosure is to provide a conveyor chain with replaceable polyurethane-covered flights. With a conveyor chain having replaceable polyurethane-covered flights, it is possible to replace damaged polyurethane-covered flights within a few minutes with minimal downtime of the continuous mining machine.

In a separate embodiment, a conveyor scraper for a chain comprises: at least two spaced apart connectors; and two side plates connecting the connectors, each side plate comprising a The side panel extends from two spaced apart extension pins. The scraper may include a metal support, and the metal support may include two spaced apart cylindrical portions adapted to receive the two spaced apart elongate pins. The scraper may also include a flexible housing surrounding the metal support.

In another independent embodiment, the scraper is provided as a chain scraper assembly for a conveyor chain, the chain scraper assembly comprising: a pair of parallel scraper pins spaced apart by a distance, each pin having a length ; a pair of spaced parallel side plates mounted on said pin; and at least one scraper. A scraper may generally include a scraper core including an arm between and coupled to each tube, and a pair of parallel tubes spaced a distance apart, and a scraper cover, each A tube has a first end and a second end, the scraper cover encloses and is secured to the core, the cover includes a first end and a second end, the first end includes a pair of openings. The core and cover may form a single scraper connectable to the pin, the first end of each tube adapted to receive a portion of the length of the associated pin, each opening in the cover adapted to receive the associated part of the pin that passes through the opening.

In a further independent embodiment, a chain scraper assembly for a conveyor chain is provided. The assembly may generally include: a pair of spaced apart parallel scraper pins, each pin having a certain length; a pair of spaced apart parallel side plates mounted on said pins; and at least one removable scraper . The scraper may include a scraper core including an arm between and coupled to each tube, and a pair of parallel tubes spaced a distance apart, and a scraper cover, each tube Having a first end and a second end, the scraper cover encapsulates and is secured to the core, the cover including a first end and a second end, the first end including a pair of openings. The core and cover may form a single scraper detachably connected to the pin, the first end of each tube detachably receiving a portion of the length of the associated pin, each opening in the cover receiving the associated Connect the part of the pin that goes through the opening.

In another independent embodiment, a chain scraper assembly for a conveyor chain is provided. The assembly may generally comprise: a pair of parallel scraper pins spaced apart by a certain distance, each pin having an outer surface and a certain length; a pair of spaced apart parallel side plates mounted on said pins; at least one removable a scraper, the at least one detachable scraper includes a pair of openings spaced apart by a certain distance, each opening having an inner surface and detachably receiving an associated pin; Between the inner surface and the outer surface of the associated pin for removably connecting the scraper to the pin.

In another independent embodiment, a method of assembling a chain scraper assembly of a conveyor chain is provided. The method may generally comprise: providing a pair of parallel scraper pins spaced apart by a distance, each pin having a certain length; mounting a pair of spaced parallel side plates on said pins; providing at least one scraper, the The scraper includes a scraper core and a scraper cover, the scraper core including an arm between and coupled to each tube and a pair of parallel tubes spaced a distance apart, each tube having A first end and a second end, the blade cover layer includes a first end and a second end, the first end includes a pair of openings, providing includes encapsulating the core in the cover layer to form a single blade; and after encapsulation , detachably connecting a single scraper to a pin includes detachably receiving a portion of the length of the associated pin in the first end of each tube, and detachably receiving the associated pin through each opening in the cover. part of the pin.

Description of drawings

Figure 1 is a partial perspective view of a conveyor including chains and flights.

Figure 2 is a perspective view of a screed including an inner core and an outer polyurethane cover.

FIG. 3 is a perspective view of the inner core shown in FIG. 2 .

FIG. 4 is a perspective view of an alternate embodiment of the inner core shown in FIG. 3 .

Figure 5 is a partial perspective view of an alternate embodiment of a conveyor including chains and flights.

Figure 6 is a perspective view of an alternate embodiment of a chain scraper assembly.

FIG. 7 is an exploded perspective view of the chain scraper assembly shown in FIG. 6 .

FIG. 8 is a perspective view of the core of the chain scraper assembly shown in FIG. 6 .

FIG. 9 is a perspective view of the outer cover of the chain scraper assembly shown in FIG. 6 .

Figure 10 is a perspective view of another alternate embodiment of a chain scraper assembly.

Before any individual embodiment of the disclosure is explained in detail, it is to be understood that the disclosure is not limited in its application to the details of construction and arrangement of parts set forth in the following description or shown in the drawings. The disclosure is capable of other independent embodiments and of being practiced or carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein are for the purpose of description and should not be regarded as limiting. The use of "comprises" and "comprises" and variations of "comprises" and "comprises" used herein is meant to encompass the items listed thereafter and equivalents of the listed items as well as additional items. Furthermore, it is to be understood that such terms as "forward," "backward," "left," "right," "upward," and "downward," etc., are words of convenience and should not be construed as restrictive term.

detailed description

A conveyor 10 including a chain 14 and a flight 18 is shown in FIG. 1 . The screed 18 comprises sound deadening material in the form of a polyurethane cover 20 and a metal support 22 in the form of an embedded steel sheet core, as shown in FIG. 2 . In other embodiments, other less preferred forms of metal support, such as blocks (not shown), may be used.

More specifically, as shown in FIG. 1 , chain 14 includes two swivel links 26 connected by two side plates 30 . While only two rotary links 26 are shown connected by two side plates 30 , the chain 14 is typically an endless chain (not shown) and the scrapers 18 are attached at spaced apart location.

Extending perpendicular to the direction of chain travel are two spaced apart pins 34 extending outwardly from each of the side plates 30 . Each of the scrapers 18 is attached to spaced apart pins 34, as explained further below. As shown in FIG. 1 , a set of two spaced pins 34 extends to the left of the chain 14 and a set of two spaced pins 34 extends to the right of the chain 14 .

Each screed 18 has a thin-walled steel core 22 , leaving room for a sufficient thickness of the sound deadening cover 20 . As shown in FIG. 3 , the core 22 is a flat steel plate having a first end 40 and a second end 44 and a left edge 48 and a right edge 52 , as shown in FIG. 3 . Each of the left and right edges of the core 22 has a cylindrical portion 50 that defines a cylindrical opening 54 that extends the length of the core 22 . The cylindrical opening 54 receives the elongated chain pin 34 . The core 22 is clamped to the scraper pin 34 by clamping means in the form of rivets or threaded fasteners 56 (see FIG. 1 ) through openings 58 which extend only through the metal support 22 . The core 22 together with the elongated pins 34 provide strength and rigidity to support the polyurethane outer shell 20 of the blade 18 .

To allow access to the rivets or threaded fasteners 56 so that the scraper 18 can be removed from the conveyor 10 , or a new scraper 18 can replace a damaged scraper, an opening 60 exists above the opening 58 through the metal support 22 . Polyurethane cover 20 in.

In one embodiment not shown, the sound attenuating blade 18 may be manufactured in multiple pieces that are glued together while being glued to the core 22 . In the preferred embodiment, the scraper 18 is molded directly onto the core 22 . More specifically, core 22 is inserted into a mold, and sound deadening material 20 is cast over the core. The core can be one piece or two pieces. Shown in FIG. 3 is a one-piece core 22 and shown in FIG. 4 is a core 72 made of two symmetrically arranged identical pieces 74 and 76 . It is also possible to make the core in one piece by welding two pieces along the edges. A one-piece core provides a more reliable grip onto the chain pin 34, but a two-piece core is less expensive to manufacture.

As shown in FIG. 5 , the length of the cylindrical opening 54 need not be the entire length of the core 22 . When using a pin 34 that does not extend the entire length of the core 22 for economical reasons, the length of the cylindrical opening 54 can be adapted to the length of the pin extension 34 . This also allows chain assemblies of various lengths to be easily manufactured by simply selecting the desired width of the scraper and keeping the pin lengths uniform.

In the illustration a double sprocket conveyor chain is shown from US Patent 6,662,932, which is incorporated herein by reference. The concept may also be applied to standard single sprocket conveyor chains. In the illustration, the urethane squeegee is shown partially transparent to reveal the squeegee pins and core within the urethane squeegee.

6 to 9 illustrate a chain scraper assembly 400 according to another embodiment of the present invention. The chain scraper assembly 400 shown in FIGS. 6-7 is similar to the chain scraper assembly described above with respect to FIGS. 1-5 , with the only differences that will be discussed here. Like elements have the same reference numerals plus "400".

Chain scraper assembly 400 includes chain scraper 418 , swivel connection 426 , side plate 430 , and scraper pin 434 . As shown in Figures 7-8, the chain scraper 418 includes a scraper cover 420 made of a sound deadening material such as polyurethane and an inner scraper core 422 made of a rigid material such as steel. Internal scraper core 422 .

Figure 8 shows core 422 in more detail. The illustrated core 422 includes two parallel tubes 438 and an arm 442 coupled to the tubes 438 . Each tube 438 includes a first end 446 and a second end 464 , and the tubes 438 are spaced apart a distance equal to the pitch length of the chain 14 . Tube 438 has an inner surface 466 that defines an inner diameter. The inner diameter is slightly larger than the diameter of the pin 434 to allow a clearance fit between the tube 438 and the outer surface of the pin 434 .

Arm portion 442 includes a first end 468 proximate first end 446 of tube 438 , a second end 480 , an upper surface 484 and a lower surface 488 . In the illustrated construction, the arm portion 442 extends parallel to the tube 438 toward a second end 480 beyond the second end 464 of the tube 438 . Arm portion 442 also includes a plurality of openings 492 extending between upper surface 484 and lower surface 488 . In other embodiments, the arm 442 may include more or fewer openings 492 of various sizes.

The blade cover 420 is made of polyurethane or another sound deadening material. As shown in FIG. 9 , the illustrated cover layer 420 substantially encapsulates the core 422 , covering the upper, lower, and outer end surfaces of the core 422 . In other configurations, the cover layer 420 may cover the inner end surface of the core 422 . The cover layer 420 extends through and fills the opening 492 of the arm portion 442 , strengthening the bond between the cover layer 420 and the arm portion 442 .

Referring again to FIG. 7 , pin 434 has an extended length for attachment to core 422 . Squeegee 418 is attached to pin 434 and, in this embodiment, an adhesive provides the structure to attach squeegee 418 to pin 434 . To assemble the scraper 418 to the chain 14 , an adhesive or chocking compound is applied to the inside of the tube 438 and/or to the pin 434 . The pin 434 may be prepared to enhance the adhesive bond, which may include knurling, grooving, or sandblasting the outer surface of the pin 434 . Sliding tube 438 over pin 434 secures scraper 418 relative to chain scraper assembly 400 . Adhesive fills the space between the interior of tube 438 and pin 434 .

A suitable adhesive has a shear strength of 5,000 psi, and the tube 438 and pin 434 are designed to have sufficient bonding area to provide the necessary strength to the chain scraper assembly 400 . Additionally, the adhesive is selected to have a melting temperature such that application of heat causes the adhesive to melt and allows an operator to remove and replace a worn or damaged blade 418 . After applying additional adhesive to pin 434 and/or tube 438 (if necessary), a new replacement scraper 418 is installed on pin 434 .

The modular design of the scraper 418 shown in FIGS. 6-9 simplifies replacement of a broken scraper without disconnecting the chain 14 and replacing the entire chain scraper assembly 400 . Rigid flight core 422 provides strength and rigidity to flight 418 , while flight cover 420 provides sound dampening to reduce noise caused by operating conveyor 10 .

Furthermore, the blade core 422 and the blade cover layer 420 simplify the manufacturing process by eliminating the need to first attach the blades to the chain blade assembly and then apply a cover layer to each blade. Alternatively, the squeegee 418 may be produced separately by first manufacturing the squeegee core 422 and then covering the core 422 in the cover layer 420 . This reduces the cost of forming the chain scraper assembly 400 with the sound deadening scraper 418 .

Depending on the desired amount of contact surface between pin 434 and tube 438, the length of tube 438 may be adjusted. Additionally, the length and shape of the arm portion 442 may be adjusted depending on the desired strength or stiffness of the squeegee 418 .

FIG. 10 shows an alternate embodiment of a chain scraper assembly 500 including a scraper 518 in which a core 522 slides over a pin 534 and the end of the pin 534 is adhered to the core 522 . The core 522 extends nearly the entire length of the blade cover 520, providing greater strength to the assembly.

In another independent embodiment (not shown), the blade is manufactured from a material having sound-absorbing properties such that a separate cover layer is not required, and of sufficient strength such that a separate core element is not required. An example of such a suitable material is ductile iron. While ductile iron is not easily welded to steel, such a scraper can be attached to the pin by adhesive as described above. The scraper may have a similar structure to scraper 418 (eg, with openings for pins 434 and with substantially the same outer shape). Alternatively, the structure of the squeegee may be similar to that shown in US Patent Application Publication No. US 2009/0250318 Al, published October 8, 2009, the entire content of which is incorporated herein by reference.

Accordingly, the present invention may generally provide a chain scraper assembly having, inter alia, a sound dampening function. One or more independent features and advantages of the invention may be set forth in the appended claims.

Claims (22)

1. a chain scraper component for conveyer chain, described assembly includes:

The pair of parallel scraper plate pin being spaced a distance, each scraper plate pin has outer surface and a length Degree；

The a pair spaced apart parallel side plate being arranged on described scraper plate pin；

At least one scraper plate, at least one scraper plate described includes with described apart from spaced apart a pair Opening, the scraper plate pin that each opening has an inner surface and receiving is associated；And

Binding agent, described binding agent is at the inner surface of each opening and the described scraper plate pin being associated Outer surface between in order to described scraper plate to be connected to described scraper plate pin,

Wherein, described scraper plate may be removably coupled to described scraper plate pin, and

Wherein, described binding agent has fusion temperature so that applies heat and can promote described bonding Agent is melted and allows to unload described scraper plate from described scraper plate pin.

Assembly the most according to claim 1, wherein, described scraper plate is formed by ductile iron.

Assembly the most according to claim 1, wherein, described scraper plate includes:

Flight core, described flight core includes arm and with described apart from spaced apart pair of parallel pipe, Described arm is between each pipe and is coupled to each pipe, and each pipe has the first end and Two ends, each pipe provides an opening in the pair of opening, and described binding agent is at each pipe Inner surface and the outer surface of the described scraper plate pin being associated between, and

Scraper plate cover layer, described scraper plate cover layer encapsulates described core and is fixed to described core, Described cover layer includes the first end and the second end, and described first end of described cover layer includes a pair Opening,

Described core and described cover layer form single scraper plate, and described single scraper plate is connectable to institute Stating scraper plate pin, the first termination of each pipe receives the part of length of the scraper plate pin being associated, institute State each opening in cover layer receive described in be associated scraper plate pin by the one of each opening Part.

4. a chain scraper component for conveyer chain, described assembly includes:

The pair of parallel scraper plate pin being spaced a distance, each scraper plate pin have outer surface, first End and the second end；

The a pair spaced apart parallel side plate being arranged on described scraper plate pin；

Flight core, described flight core has the first end and the second end, and described first end limits fixing To the first end of each scraper plate pin and at least one surface of separating with each side sheet room；And

Cover layer, described cover layer fully encapsulates described flight core and close to described flight core Described scraper plate pin at least some of.

Chain scraper component the most according to claim 4, wherein, described cover layer have with One end that each side sheet room separates.

Chain scraper component the most according to claim 4, wherein, described flight core includes fixed Position is between described scraper plate pin and is fixed to the part of two scraper plate pins.

Chain scraper component the most according to claim 4, wherein, described flight core described Second end limits trapezoidal shape.

Chain scraper component the most according to claim 4, wherein, described flight core includes Side and the second side, and described flight core is limited between described first side and described second side At least one opening extended, and wherein, the material of described cover layer fill described at least one Individual opening.

Chain scraper component the most according to claim 4, wherein, described flight core limits core Length, and the cover layer length that the restriction of described cover layer is bigger than described core length.

Chain scraper component the most according to claim 4, wherein, described flight core is One flight core, and described cover layer is the first cover layer, and described chain scraper component enters one Step includes:

Second flight core, described second flight core has the first end and the second end, and described second scrapes Plate core described first end limit be fixed to each scraper plate pin the second end and with each side sheet room At least one surface separated；With

Second cover layer, described second fully enclosed described second flight core of cover layer and close to institute State described scraper plate pin at least some of of the second flight core.

11. chain scraper components according to claim 4, wherein, described flight core is removable It is connected to described scraper plate pin with unloading.

12. chain scraper components according to claim 4, wherein, by pressing from both sides described core On described scraper plate pin, described flight core is detachably connected to described scraper plate pin.

13. chain scraper components according to claim 4, wherein, described flight core includes A pair spaced apart plate with in order to clip to the securing member on described scraper plate pin together with described plate.

14. chain scraper components according to claim 13, wherein, described flight core and institute State cover layer to limit for the opening receiving described securing member.

15. chain scraper components according to claim 11, wherein, each scraper plate pin all has Having outer surface, wherein, described flight core includes of the first end for receiving described scraper plate pin To pipe, and described chain scraper component further includes at each pipe and the appearance of each scraper plate pin Binding agent between face.

16. chain scraper components according to claim 15, wherein, outside each scraper plate pin Surface is textured to increase the contact between described scraper plate pin and described binding agent.

17. chain scraper components according to claim 15, wherein, described binding agent includes Clogging compounds.

The chain scraper component of 18. 1 kinds of conveyer chains, described assembly includes:

The pair of parallel scraper plate pin being spaced a distance, each scraper plate pin have outer surface, first End and the second end；

The a pair spaced apart parallel side plate being arranged on described scraper plate pin；

Flight core, described flight core includes being fixed at least one of the first end of each scraper plate pin End surfaces, described flight core limits the first side and the second side, and described flight core wraps further Include at least one opening extended between described first side and described second side；And

Cover layer, described cover layer encapsulates described flight core, and wherein said cover layer is filled described At least one opening described in flight core.

19. chain scraper components according to claim 18, wherein, described flight core includes It is positioned between described flight core and is fixed to the part of two flight core.

20. chain scraper components according to claim 18, wherein, the of described flight core Two ends limit trapezoidal shape.

21. chain scraper components according to claim 18, wherein, described flight core limits Core length, and the cover layer length that the restriction of described cover layer is bigger than described core length.

22. chain scraper components according to claim 18, wherein, described flight core is One flight core, and described cover layer is the first cover layer, and described chain scraper component enters one Step includes:

Second flight core, described second flight core has the first end and the second end, described first end Limit the second end being fixed to each scraper plate pin and at least one table separated with each side sheet room Face；With

Second cover layer, described second fully enclosed described second flight core of cover layer and close to institute State described scraper plate pin at least some of of the second flight core.