CN201225258Y - Compressor forging air cylinder - Google Patents

Abstract

The utility model relates to a compressor cylinder, in particular to a piston compressor wrought cylinder which is provided with an air inlet, an air outlet and a cylinder compression cavity. Two air inlet valve cavities and two air outlet valve cavities are respectively arranged above and below each action side of the cylinder, and the air inlet valve cavities and the air outlet valve cavities between the two action sides are respectively communicated through separate air flues. The wrought cylinder solves the problem of only one-inlet and one-outlet mode by the valve cavities of the traditional wrought cylinder, can replace a ductile cast iron cylinder under the conditions that the maximum set pressure of a cylinder safety valve is more than 50bar and the cylinder diameter is between 400 mm and 700 mm, reduces the waste caused by the casting problem and the influences of the performance, the safety and the reliability of the machinery, and has simple structure and convenient processing.

Description

A compressor forged cylinder

technical field

The utility model relates to a compressor cylinder, in particular to a piston type forged cylinder of a compressor.

Background technique

The cylinder of the compressor is made of different strength materials due to different working pressures. According to the API618 standard issued by the American Petroleum Institute, cast iron cylinders can be used if the maximum set pressure of the cylinder safety valve is lower than 70bar, and cast steel or forged steel should be used for those higher than 70bar. Due to the limitation of casting performance, especially the compressed hydrogen has strong molecular activity and is easy to leak. In order to ensure the safety of operation, the maximum setting pressure of the general cylinder safety valve is greater than 50bar, that is, a forged cylinder is required. Since the compressor forged cylinder is made of a large forging with a simple shape, all gas passages must be obtained by machining, requiring a simple structure, so the traditional compressor forged cylinder is shown in Figure 1 and Figure 2. On the side of the cylinder head, there is only one intake valve cavity 1 on the top and one exhaust valve cavity 2 on the bottom; Only one exhaust valve cavity 2 is provided; two intake valve cavities 1 and two exhaust valve cavities 2 are respectively connected through air passages 3 . The cylinder compression chamber 8 located between the intake and exhaust valve chambers runs through the entire forged cylinder. In this way, it is necessary to add a cylinder seat on the side of the cylinder shaft, even if the structure of the forged cylinder becomes complicated. , The connection between the cylinder seat and the cylinder shaft side is also prone to leakage. Since the existing compressor forged cylinder valve cavity has only one inlet and one outlet, it is generally only suitable for cylinder diameters less than 400mm.

With the large-scale development of petrochemical industry equipment, high pressure, large flow, and petrochemical processes where the compressed medium is flammable and explosive will require a large number of large compressor forged cylinders. The diameter of forged cylinders is often higher than 400mm. Now Some forged cylinders can no longer meet the requirements.

Utility model content

In order to solve the problems of small compression and small diameter of the existing forged cylinder, the purpose of the utility model is to provide a compressor forged cylinder with large compression and large diameter.

The purpose of this utility model is achieved through the following technical solutions:

The utility model is provided with an air inlet, an exhaust port and a cylinder compression chamber, and two air inlet valve chambers are respectively arranged above each action side of the cylinder, and two exhaust valve chambers are respectively arranged below each action side of the cylinder. The inlet valve cavity and the exhaust valve cavity between them are respectively communicated through independent air passages.

Among them: the upper and lower sides of the cylinder are respectively provided with inlet and exhaust ports connected with the air passage, and the inlet and exhaust ports are respectively connected with the inlet and exhaust valve chambers through the air passage; located between the two action sides, connected to the inlet The two air passages of the air valve cavity are parallel to each other; the two air passages located between the two action sides and connected to the exhaust valve chamber are parallel to each other; the axial length of the compression chamber of the cylinder is smaller than the length of the cylinder, and the cylinder shaft side is provided with The packing chamber connected to the compression chamber; the axes of the two intake valve chambers on the same acting side of the cylinder are parallel to each other and perpendicular to the axis of the compression chamber of the cylinder; the axes of the two exhaust valve chambers on the same acting side of the cylinder are parallel to each other , and perpendicular to the axis of the cylinder compression chamber; the inlet and exhaust valve chambers communicate with the cylinder compression chamber through the valve hole, and the axis of the air hole at the valve hole is eccentrically set with the axis of the inlet and exhaust valve chambers; in the upper and lower air passages There are multiple water cavities evenly distributed on the cylinder near the cylinder bore; there are process holes for processing air passages on the side of the cylinder head.

Advantage and positive effect of the present utility model are:

The forged cylinder of the utility model solves the problem that the valve cavity of the traditional forged cylinder can only be one in and one out. The highest setting pressure of the cylinder safety valve is greater than 50bar, and the cylinder diameter is between 400mm and 700mm, which can replace nodular ink. The cast iron cylinder reduces the waste caused by casting problems and the impact on machine performance, safety and reliability, and has a simple structure and convenient processing. Specifically:

1. The forged cylinder of the utility model is equipped with two intake valve cavities and two exhaust valve cavities on each action side, which is a two-in-two-out type, increasing the cylinder diameter, increasing the flow rate and increasing the compression capacity , to meet the needs of the growing petrochemical process.

2. The shaft side of the cylinder is a bottom-sealed structure, the cylinder seat is canceled, the leakage of the connection point and the sealing point is reduced, and the structure is simple.

3. The eccentric design is adopted for the intake and exhaust valve cavity and the compression cavity of the cylinder, which improves the strength of the cylinder liner.

4. Process holes are set on the side of the cylinder head to facilitate the processing of air passages.

Description of drawings

Fig. 1 is a schematic diagram of the internal structure of an existing one-in-one-out compressor forged cylinder;

Fig. 2 is A-A sectional view of Fig. 1;

Fig. 3 is a schematic diagram of the internal structure of the utility model;

Fig. 4 is the BB sectional view of Fig. 3;

Fig. 5 is the CC sectional view of Fig. 3;

Among them: 1 is the intake valve chamber, 2 is the exhaust valve chamber, 3 is the air passage, 4 is the air inlet, 5 is the cylinder head side, 6 is the cylinder shaft side, 7 is the process hole, 8 is the cylinder compression chamber, 9 is a packing chamber, 10 is a cylinder liner, 11 is a water chamber, 12 is a valve hole, and 13 is an exhaust port.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in Figures 3 to 5, an air inlet 4 is provided above the cylinder of the utility model, an exhaust port 13 is provided below, and a cylinder compression chamber 8 is provided between the inlet and exhaust ports 4 and 13. There are two intake valve cavities 1 on the top of 5, and two exhaust valve cavities 2 on the bottom; two intake valve cavities 1 on the cylinder shaft side 6, and two exhaust valve cavities on the bottom 2. The two groups of intake valve chambers 1 between the cylinder head side 5 and the cylinder shaft side 6 are connected through two independent air passages 3, and the two groups of exhaust valve chambers between the cylinder head side 5 and the cylinder shaft side 6 2 are connected through two independent air passages 3; the two air passages 3 connected to the intake valve chamber 1 are parallel to each other, and the two air passages 3 connected to the exhaust valve chamber 2 are parallel to each other. The top and bottom of the central axis of the cylinder are respectively provided with intake and exhaust ports 4, 13, the upper intake port 4 communicates with the air channel 3 between the intake valve chamber 1; the lower exhaust port 13 communicates with the exhaust valve The air passages 3 between the cavities 2 communicate. The cylinder compression chamber 8 does not pass through the cylinder, the axial length of the cylinder compression chamber 8 is less than the length of the cylinder, the cylinder axial side 6 has a packing chamber 9 connected with the cylinder compression chamber 8, and the diameter of the packing chamber 9 is smaller than that of the cylinder compression chamber 8 diameter. The axes of the two intake valve chambers 1 on the same acting side of the cylinder are parallel to each other and perpendicular to the axis of the cylinder compression chamber 8; the axes of the two exhaust valve chambers 2 on the same acting side of the cylinder are parallel to each other and perpendicular to the cylinder Axis of the compression chamber 8. The intake and exhaust valve chambers 1 and 2 communicate with the cylinder compression chamber 8 through the valve hole 12, and the axis of the air hole at the valve hole 12 is set eccentrically with the axis of the intake and exhaust valve chambers 1 and 2, so that the strength of the cylinder liner 10 is increased , improving the performance of the cylinder liner 10. A plurality of water cavities 11 are evenly distributed on the cylinder near the bore between the upper and lower air passages 3, which can be cooled by water. In order to process the air passage, there are four process holes 7 at the side 5 of the cylinder head, which communicate with the four air passages 3 respectively; after the air passage processing is completed, the process holes are sealed with a cover. The cylinder compression chamber 8 of the utility model does not penetrate the entire cylinder, and the cylinder shaft side 6 is a bottom-sealed structure, which cancels the cylinder seat of the existing forging cylinder, that is, the cylinder seat and the cylinder body of the utility model are integrated, even if The forged cylinder of the utility model has a simple structure and reduces the leakage of connecting points and sealing points caused by connecting the cylinder seat. Especially important for high pressure cylinders. The cylinder head side 5 is sealed by the cylinder head, and the cylinder shaft side 6 is sealed by the packing in the packing chamber 9 .

In order to meet the requirements of design performance and mechanical processing, the forged cylinder of the utility model has a square shape.

Claims (8)

1. A forged cylinder of a compressor is provided with an air inlet, an air outlet and a cylinder compression chamber, and is characterized in that two air inlet valve chambers (1), Two exhaust valve chambers (2) are respectively arranged below, and the intake valve chamber (1) and the exhaust valve chamber (2) between the two action sides are respectively connected through independent air passages (3). 2. The compressor forged cylinder according to claim 1, characterized in that: the upper and lower sides of the cylinder are respectively provided with inlet and outlet ports (4, 13) connected with the air passage (3), and the inlet and outlet The exhaust ports (4, 13) communicate with the intake and exhaust valve chambers (1, 2) respectively through the air channel (3). 3. The compressor forged cylinder according to claim 1, characterized in that: the two air passages (3) located between the two acting sides and connected to the intake valve cavity (1) are parallel to each other; , The two air passages (3) connecting the exhaust valve cavity (2) are parallel to each other. 4. The compressor forged cylinder according to claim 1, characterized in that: the axial length of the cylinder compression chamber (8) is smaller than the length of the cylinder, and the cylinder shaft side (6) is provided with a cylinder compression chamber (8) ) connected to the filler chamber (9). 5. The compressor forged cylinder according to claim 1, characterized in that: the axes of the two inlet valve chambers (1) on the same acting side of the cylinder are parallel to each other and perpendicular to the axis of the cylinder compression chamber (8) ; The axes of the two exhaust valve chambers (2) on the same acting side of the cylinder are parallel to each other and perpendicular to the axis of the cylinder compression chamber (8). 6. The compressor forged cylinder according to claim 1, characterized in that: said intake and exhaust valve chambers (1, 2) communicate with the cylinder compression chamber (8) through a valve hole (12), and the valve hole The axis of the air hole at (12) is arranged eccentrically with the axis of the intake and exhaust valve chambers (1, 2). 7. The compressor forged cylinder according to claim 1, characterized in that: between the upper and lower air passages (3) and on the cylinder close to the bore, there are a plurality of water cavities (11) evenly distributed. 8. The compressor forged cylinder according to claim 1, characterized in that: a process hole (7) for processing air passage is opened on the cylinder head side (5).

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