JPS6045318B2 - jet pump equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a so-called jet pump device which is used in shallow wells by combining a jet main body with a Hugal pump.

The jet pump device consists of a combination of a jet main body equipped with a throat tube that constitutes a jet nozzle section and a differential user, and a Beaucal pump driven by a motor, and jet pressure water is injected from the nozzle section by the Hugal pump. By doing so, the water sucked up from the suction pipe by the jet action is pumped up through the differential user, and part of that water is used again as jet pressure water, and the remaining water is sent to the designated location. It is.

In a jet pump device like the one mentioned above,
The larger the nozzle diameter of the jet, the larger the amount of reflux water and the faster the white coating effect can be performed.

However, with regard to the pressure curve flow rate characteristics, when the nozzle diameter is large, the pressure increases, but the flow rate at low pressure decreases, and the efficiency I deteriorates. Furthermore, if the nozzle diameter is small, efficiency during pump operation is good, but there are disadvantages such as the inability to see the whites of the eyes and the long time it takes to clean the whites of the eyes. Therefore, the present invention has been devised to increase the nozzle diameter during white suction so that the white suction effect can be performed quickly and efficiently, and to reduce the nozzle diameter during subsequent operation to obtain the originally efficient pressure car flow rate characteristics. It is something.

That is, the present invention includes a fixed nozzle with a large nozzle diameter in a nozzle portion in a jet main body, and a fixed nozzle that is movable in the axial direction so as to be able to fit into the inner circumference from the rear side of the fixed nozzle, and that is smaller than the fixed nozzle. a movable nozzle having a small nozzle diameter, the movable nozzle is set to be able to move away from the nozzle to a position where the opening area force between the two nozzles is larger than the nozzle effective area of the individual nozzle, and the movable nozzle A support member connected to the rear side of the jet is protruded out of the jet body, and the movable nozzle is moved by pushing and pulling by grasping the support member. During self-priming, the movable nozzle is separated from the fixed nozzle and the nozzle has a large diameter. A fixed nozzle can be used, and a movable nozzle with a smaller nozzle diameter can then be used by fitting it into the fixed nozzle. Examples thereof will be described below with reference to the drawings. 1 is the jet nozzle part 6
3 is a jet main body having a throat tube 2 constituting a differential user, and 3 is a jet water passageway to a nozzle portion 6.

Reference numeral 4 denotes a Hugal pump driven by a motor 5, and the throat tube 2 is connected to the suction side of the Hugal pump 4, and the jet water supply channel 3 is connected to the discharge side, thereby forming a jet pump device for shallow wells. The jet main body 1 is connected with a suction pipe that communicates with the ejection side of the nozzle portion 6 via a suction channel 19.

The nozzle part 6 has a fixed nozzle 7 fixed to the jet body 1 with a large nozzle diameter d1, and a fixed nozzle 7 which is movable in the axial direction so as to be able to fit into the inner periphery of the tapered part from the rear side of the fixed nozzle 7. A movable nozzle 8 having a smaller nozzle diameter 4 than the fixed nozzle 7 is provided coaxially with the throat tube 2. Therefore, the nozzle diameter of the fixed nozzle 7 is usually set so as to obtain the required pressure, and the diameter of the movable nozzle 8, which has a smaller diameter than this, is determined in consideration of efficiency at a fixed path point.

Reference numeral 9 denotes a support member connected to the rear side of the movable nozzle 8, which slidably passes through a hollow support portion 10 formed in a part of the jet body 1, with its end projecting outside the jet body 1. The movable nozzle 8 can be pushed or pulled in the direction of fitting into and removing from the fixed nozzle 7 by gripping a knob 11 provided at the protruding end of the support member 9.

The movable nozzle 8 includes at least both nozzles 7.
, 8 is set so that it can be removed and removed to a position where the opening area between the fixed nozzles 7 is larger than the effective nozzle area of the fixed nozzle 7. By removing and removing the movable nozzle 8, the pressure water is supplied to both nozzles. 7 and 8 and is injected from the fixed nozzle 7. Further, when the movable nozzle 8 is fitted into the fixed nozzle 7, water is not fed from the space 12 between the movable nozzle 8 and the fixed nozzle 7, and water can be fed only from the movable nozzle 8. In particular, in the case shown in the figure, a flange 13 is formed around the rear end of the movable nozzle 8, and when the movable nozzle 8 is fitted into the fixed nozzle 7, the flange 13 comes into contact with the seat surface 14 on the fixed nozzle 7 side. Even if the tapered part of the movable nozzle 8 and the tapered part of the fixed nozzle 7 do not come into close contact with each other, water can be stopped from flowing between the two nozzles 12, and the movable nozzle 8 can be separated from the fixed nozzle 7. It makes it easy to do.
Furthermore, a gate fixing means for fixing the movable nozzle 8 to the fixed nozzle 7 in a fitted state and a gate fixing means for fixing the movable nozzle 8 to the fixed nozzle 7 are provided.
It is desirable to provide a fixing means that can be fixed in the detached state from the mating state to improve stability in the fitted state and the disengaged state. As the fixing means, for example, in the illustrated embodiment, a latching pin 15 is provided in a portion of the support member 9 that passes through the support portion 10'', and a movable nozzle 8 is provided on the inner periphery of the support portion 10. When the fixed nozzle 7 is in the fitted state and when the movable nozzle 8 is in the detached state from the fixed nozzle 7,
Two recesses 16 into which the latching pins 15 can be fitted and latched, respectively.
, 17, and a guide groove 18 for the latching pin 15 is formed between the recesses 16, 17, and the latching pin 15 is fitted and latched into one of the recesses 16, 17 to fix the support member 9. The push and pull movement of the support member 9 is made possible by the support member 9.
is rotated so that the locking pin 15 is aligned with the guide groove 18. In addition to the above, various other fixing means can be used as the fixing means, and a spring (not shown) that presses the movable nozzle 8 in the fitting direction to the fixed nozzle 7 may be provided to fix the movable nozzle 8 to the fixed nozzle 7. The support member 9 may be pulled against the spring only when the support member 9 is brought into a detached state from the support member 7 (during self-priming).

As described above, the present invention includes the fixed nozzle 7 having a large nozzle diameter in the nozzle portion and the movable nozzle 8 having a smaller nozzle diameter than the fixed nozzle 7 and movable in the axial direction so as to be able to fit freely into the fixed nozzle 7. , this movable nozzle 8 is fixed nozzle 7 with an opening area between at least the two nozzles 7 and 8.
The movable nozzle 8 is set so that it can be removed and removed to a position larger than the effective area of the nozzle, and a supporting member 9 connected to the rear side of the movable nozzle 8 is made to protrude outside the jet main body 1, so that the movable nozzle 8 can be moved to a fixed nozzle. The support member 9 is provided so that it can be pushed and pulled in the direction of fitting and removal from the fixed nozzle 7 by pulling the support member 9 during self-priming during pump operation to remove the movable nozzle 8 from the fixed nozzle 7 Both nozzles 7, 8
It is possible to separate the fixed nozzle 7 to a position where the opening area between the two is larger than the nozzle effective area of the fixed nozzle 7 or more,
In this detached state, the jet water is supplied from the movable nozzle 8.
Water is supplied from 12 between the fixed nozzle 7 and the fixed nozzle 7, and self-priming can be performed using the fixed nozzle 7 with a large nozzle diameter d1, and the amount of return water is larger than when using the movable nozzle 8 with a small nozzle diameter, and the self-priming time is shorter. This allows for efficient self-priming action.

For example, if the movable nozzle 8 has the same nozzle diameter as the conventional product in consideration of efficiency during pump operation, the nozzle diameter of the fixed nozzle 7 is formed larger than the nozzle diameter, so as described above, the movable nozzle 8 is removed and moved to a position where the opening area between both nozzles is larger than the nozzle effective area of the fixed nozzle 7, as shown in Fig. 4, in the case of a conventional jet pump whose nozzle diameter is about the same as that of the movable nozzle. Superior self-priming characteristics can be obtained compared to After self-priming is completed, if the support member 9 is pushed to fit the movable nozzle 8 to the fixed nozzle 7, the jet water will not be fed from the space 12 between the movable nozzle 8 and the fixed nozzle 7, and the nozzle diameter ↓ Since the water is injected only from the small movable nozzle 8, efficient pressure car flow characteristics can be obtained when the nozzle diameter is small.

Therefore, the present invention is an excellent invention in which the nozzle diameter is increased during self-priming to quickly and efficiently perform the self-priming action, and during subsequent operation, the nozzle diameter is decreased to improve efficiency.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram, FIG. 2 is an enlarged cross-sectional view of a main part, FIG. 3 is a cross-sectional view taken along the line ■--■ in the previous figure, and FIG. 4 is a self-priming characteristic diagram. 1... Jet body, 2... Throat tube, 3... Jet water supply channel, 4...
・・・Hyugalbump, 5...Motor, 6
...Nozzle part, 7...Fixed nozzle, 8...
...Movable nozzle, 9...Support member.

Claims (1)

[Claims] 1. A jet body comprising a jet nozzle portion, a throat tube constituting a differential user on the ejection side, and a Hugal pump driven by a motor. A throat tube is connected to the suction side, and a jet water conduit to the nozzle is connected to the discharge side, and water is sucked up from the suction pipe by jet action by injecting pressure water from the Hugal pump from the jet nozzle. In a jet pump device that can pump water through a differential user, a fixed nozzle with a relatively large nozzle diameter is attached to the nozzle part of the jet main body, and a shaft is arranged so that the fixed nozzle can be fitted into the inner circumference from the rear side of the fixed nozzle. a movable nozzle that is movable in the center direction and has a smaller nozzle diameter than the fixed nozzle, and the movable nozzle is capable of detaching and moving to a position where the opening area between the two nozzles is larger than the nozzle effective area of the fixed nozzle. The jet is further configured such that a support member connected to the rear side of the movable nozzle protrudes toward the jet main body, and is provided so that the fixed nozzle can be pushed or pulled by gripping the support member. pump equipment. 2. The jet pump device according to claim 1, wherein the movable nozzle 8 can be fixed in a fitted state with the fixed nozzle 7. 3. The jet pump device according to claim 1 or 2, wherein the movable nozzle 8 can be fixed in a detached state from the fixed nozzle 7.