CN221237181U

CN221237181U - Natural gas compressor air valve

Info

Publication number: CN221237181U
Application number: CN202323358106.2U
Authority: CN
Inventors: 申承斌; 韩利平; 陈鹏飞
Original assignee: Puyang Shunda Oil And Gas Engineering Technology Co ltd
Current assignee: Puyang Shunda Oil And Gas Engineering Technology Co ltd
Priority date: 2023-12-11
Filing date: 2023-12-11
Publication date: 2024-06-28
Anticipated expiration: 2033-12-11

Abstract

The utility model relates to the technical field of natural gas conveying, in particular to a natural gas compressor air valve. Including the disk seat, elastic sliding connection has top ring and valve pad in the disk seat, top ring is located valve pad below, top ring and valve pad fixed connection, fixed connection's valve gap subassembly can be dismantled to the disk seat upper end, the valve gap subassembly includes outer loop and inner ring, be provided with a plurality of concentric sealing rings between outer loop and the inner ring, outer loop, inner ring and a plurality of sealing ring fixed connection, valve pad upper end and outer loop lower extreme, sealing ring lower extreme and inner ring lower extreme sealing contact, a plurality of last arc wall have all been seted up on the valve pad of sealing ring below, the sealing ring seals the shutoff of the last arc wall of its below, set up the lower arc wall with last arc wall intercommunication on the top ring. According to the utility model, the top ring is fixedly connected with the valve pad, so that the overall strength of the valve pad can be increased, and the situation that the valve pad deforms after being used for a long time can be avoided.

Description

Natural gas compressor air valve

Technical Field

The utility model relates to the technical field of natural gas conveying, in particular to a natural gas compressor air valve.

Background

In the exploitation process of oilfield associated gas, a natural gas reciprocating compressor is a main device for pressurizing and conveying natural gas. The gas valve is an important part in a natural gas type reciprocating piston compressor and is one of the vulnerable parts. Its quality directly affects the discharge capacity, power consumption and operation reliability of the compressor. The natural gas piston compressor generally adopts an automatic valve, namely the opening and closing of the air valve are realized by means of pressure difference on two sides of the valve plate, and no other driving mechanism is arranged.

From the air valve working principle, the air valve working performance directly influences the working of the compressor cylinder. Therefore, there are the following requirements for the gas valve: the magnitude of the valve drag loss is related to the valve clearance velocity of the air flow and the magnitude of the spring force. The higher the gas velocity, the greater the energy loss; the spring force is too large, the resistance loss is also large, and the size of the spring force is designed and determined according to the rationality criterion of the motion rule of the air valve.

When the natural gas reciprocating compressor runs, the motor drives the crankshaft to do rotary motion, and the piston is made to do reciprocating motion through the connecting rod. The crankshaft rotates for one circle, the piston reciprocates once, and the processes of air suction, compression and air discharge are sequentially realized in the cylinder, so that one working cycle is completed. The working volume in the cylinder increases gradually and the pressure decreases gradually as the piston moves to the left during inspiration. When the pressure is reduced to be slightly lower than the pressure in the air inlet pipe, the air in the air inlet pipe pushes the air valve to enter the air cylinder, the working volume is maximum when the piston reaches the leftmost position (also called as a inner dead point), and the air valve starts to be closed. The working volume in the cylinder is reduced and the gas pressure is gradually increased as the piston moves to the right during compression. Because the air valve has a non-return effect, the air in the air cylinder cannot flow back into the air inlet pipe. Meanwhile, the pressure of the gas in the exhaust pipe is higher than the pressure in the cylinder, the gas in the cylinder cannot flow out of the check valve of the exhaust pipe, and the gas in the exhaust pipe cannot enter the cylinder due to the non-return effect of the check valve of the exhaust pipe. At this time, the amount of gas in the cylinder is kept constant, and the gas pressure in the cylinder is continuously increased as the piston moves rightward. When the piston moves to the right to a certain position in the exhaust process, the gas pressure in the cylinder is raised to be slightly higher than the gas pressure in the exhaust pipe, and the gas pushes up the one-way valve on the exhaust pipe to enter the exhaust pipe until the piston moves to the rightmost position (also called as external dead point). The exhaust pipe is closed in one direction, and the piston moves leftwards again. The above process is repeated.

The valve plate of most of the existing natural gas compressor air valves is made of peek material, and after a certain period of use, the valve plate is easy to deform and wear, so that the airtight performance is reduced.

Disclosure of utility model

The technical problem to be solved by the utility model is to provide the natural gas compressor air valve which can prolong the service life and ensure the air tightness of the air valve.

In order to achieve the above purpose, the technical scheme provided by the utility model is as follows:

The utility model provides a natural gas compressor pneumatic valve, includes the disk seat, and elastic sliding seal is connected with top ring and valve pad in the disk seat, and the top ring is located valve pad below, top ring and valve pad fixed connection, and the valve gap subassembly of fixedly connected with can be dismantled to the disk seat upper end.

The valve gap subassembly includes outer loop and inner ring, be provided with a plurality of concentric sealing rings between outer loop and the inner ring, a plurality of sealing rings reduce in proper order from outer diameter to interior, outer loop, inner ring and a plurality of sealing ring fixed connection, be provided with gas passage between outer loop, inner ring and the a plurality of sealing rings, valve pad upper end and outer loop lower extreme, sealing ring lower extreme and inner ring lower extreme sealing contact, all offered a plurality of arc grooves on the valve pad of sealing ring below, the sealing ring seals the shutoff of the last arc groove of its below, offered the lower arc groove with last arc groove intercommunication on the top ring.

The sealing ring lower extreme all is fixed with a plurality of vertical polished rods, goes up polished rod and last arc groove dislocation set, goes up polished rod and extends to in the last blind hole of top ring behind the through-hole that runs through the valve pad, goes up polished rod and valve pad and top ring sliding seal connection.

Compared with the prior art, the utility model has the beneficial effects that:

1. According to the utility model, the top ring is fixedly connected with the valve pad, so that the overall strength of the valve pad can be increased, and the situation that the valve pad deforms after being used for a long time can be avoided.

2. Through setting up polished rod and polished rod down, can prevent that top ring and valve pad from appearing the circumstances of eccentric wear at valve pad and top ring at the in-process of disk seat internal motion, can improve the life and the sealed effect of pneumatic valve.

Drawings

Fig. 1 is a top view of the present utility model.

Fig. 2 is a sectional view taken along the direction a in fig. 1.

Fig. 3 is a cross-sectional view in the direction B of fig. 1.

Fig. 4 is a bottom view of the valve cover assembly.

Fig. 5 is a top view of the valve pad.

Fig. 6 is a top view of the top ring.

The names of the parts in the drawings are as follows:

1. Outer ring

2. Connecting rod

3. Sealing ring

4. Inner ring

5. Screw rod

6. Nut

7. Valve pad

8. Top ring

9. Valve seat

10. Through hole

11. Polish rod

12. Lower polish rod

13. Lower blind hole

14. Spring

15. Upper arc-shaped groove

16. Lower arc-shaped groove

17. And (5) an upper blind hole.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Embodiment one:

Referring to fig. 1-6, a gas valve of a natural gas compressor comprises a valve seat 9, wherein a top ring 8 and a valve pad 7 are elastically and slidably connected in the valve seat 9, the top ring 8 is positioned below the valve pad 7, and the top ring 8 is fixedly connected with the valve pad 7. The valve pad 7 is made of peek material. The top ring 8 is a metal ring. The upper end of the valve seat 9 is detachably and fixedly connected with a valve cover assembly.

The valve cover assembly comprises an outer ring 1 and an inner ring 4, and a plurality of concentric sealing rings 3 are arranged between the outer ring 1 and the inner ring 4. The diameters of the plurality of seal rings 3 decrease in order from outside to inside. The outer ring 1, the inner ring 4 and the plurality of sealing rings 3 are fixedly connected, and the outer ring 1, the inner ring 4 and the plurality of sealing rings 3 are fixedly connected through the plurality of connecting rods 2. Gas passages are provided between the outer ring 1, the inner ring 4 and the plurality of seal rings 3.

The upper end of the valve pad 7 is in sealing contact with the lower end of the outer ring 1, the lower end of the sealing ring 3 and the lower end of the inner ring 4, a plurality of upper arc-shaped grooves 15 are formed in the valve pad 7 below the sealing ring 3, the sealing ring 3 seals and plugs the upper arc-shaped grooves 15 below the valve pad, and a lower arc-shaped groove 16 communicated with the upper arc-shaped grooves 15 is formed in the top ring 8.

The lower extreme of sealing ring 3 all is fixed with a plurality of vertical polished rod 11, and polished rod 11 and last arc groove 15 dislocation set, and in polished rod 11 runs through the through-hole 10 of valve pad 7 and extends to the last blind hole 17 of top ring 8 after, polished rod 11 and valve pad 7 and top ring 8 sliding seal are connected.

The screw rod 5 is fixed in the valve seat 9, the screw rod 5 penetrates through the top ring 8 and the valve pad 7, the screw rod 5 is in sliding sealing connection with the top ring 8 and the valve pad 7, a spring 14 is sleeved on the screw rod 5 between the valve seat 9 and the top ring 8, the screw rod 5 penetrates through the inner ring 4, and a nut 6 is connected to the screw rod 5 above the inner ring 4 in a threaded manner. The lower end of the outer ring 1 is in contact with the upper end of the valve seat 9.

The air valve is arranged on an air inlet pipe of the natural gas compressor. When the natural gas compressor does not work, under the action of the elasticity of the spring 14, the spring 14 enables the valve pad 7 to tightly lean against the lower ends of the inner ring 4, the outer ring 1 and the plurality of sealing rings 3 through the top ring 8, and the valve seat 9 is blocked after the upper end of the valve pad 7 contacts with the lower ends of the inner ring 4, the outer ring 1 and the plurality of sealing rings 3.

When the natural gas compressor is operated, after the piston in the cylinder moves and the pressure in the cylinder is reduced, the valve pad 7 and the top plate descend and press the spring 14 under the negative pressure in the cylinder. After the valve pad 7 is separated from the lower end of the inner ring 4, the lower end of the outer ring 1 and the lower ends of the sealing rings 3, natural gas in the gas inlet pipe enters the cylinder after passing through the gas channels between the outer ring 1, the inner ring 4 and the plurality of sealing rings 3, the upper arc-shaped groove 15, the lower arc-shaped groove 16 and the valve seat 9. When the piston in the cylinder moves and presses the natural gas in the cylinder, the top ring 8 and the valve pad 7 are in sealing contact with the lower end of the outer ring 1, the lower end of the sealing ring 3 and the lower end of the inner ring 4 under the elastic force of the spring 14, and the gas valve is closed and prevents the natural gas in the cylinder from being discharged from the gas inlet pipe. Along with the continuous compression of the natural gas in the cylinder, the compressed natural gas in the cylinder can be discharged after opening a one-way valve on an exhaust pipe of the natural gas compressor.

In the process of reciprocating motion of the top ring 8 and the valve pad 7 in the valve seat 9, the upper polish rod 11 is slidably arranged in the through hole 10 and the upper blind hole 17, the upper polish rod 11 can play a role in righting the motion of the top ring 8 and the valve pad 7, and the top ring 8, the valve pad 7 and the valve seat 9 can be prevented from being eccentrically worn.

Embodiment two:

on the basis of the first embodiment, referring to fig. 2, a vertical lower polish rod 12 is fixed at the lower end of the top ring 8, and the lower end of the lower polish rod 12 is slidably inserted into a lower blind hole 13 of the valve seat 9.

In the process of reciprocating motion of the top ring 8 and the valve pad 7 in the valve seat 9, the lower polish rod 12 reciprocates up and down in the lower blind hole 13, the lower polish rod 12 slides in the lower blind hole 13 to further perform a centralizing effect on the top ring 8 and the valve pad 7, and the top ring 8 and the valve pad 7 can be further prevented from being eccentric-worn with the valve seat 9. The service life of the valve pad 7 can be improved.

In the description of the present utility model, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "another end," "upper," "one side," "top," "inner," "front," "center," "two ends," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. The utility model provides a natural gas compressor pneumatic valve, including disk seat (9), a serial communication port, elastic sliding seal connects in disk seat (9) has top ring (8) and valve pad (7), top ring (8) are located valve pad (7) below, top ring (8) and valve pad (7) fixed connection, the fixedly connected with valve gap subassembly can be dismantled to disk seat (9) upper end, valve gap subassembly includes outer loop (1) and inner ring (4), be provided with a plurality of concentric sealing rings (3) between outer loop (1) and inner ring (4), diameter from outside to inside of a plurality of sealing rings (3) reduces in proper order, be provided with gas passage between outer loop (1), inner ring (4) and a plurality of sealing rings (3), valve pad (7) upper end and outer loop (1) lower extreme, sealing ring (3) lower extreme and inner ring (4) lower extreme sealing contact, all offer a plurality of upper arc grooves (15) on valve pad (7) below sealing ring (3), a plurality of arc grooves (15) are all offered to upper arc grooves (15) on its upper end (15) and lower arc grooves (15) of sealing ring (3), upper arc grooves (15) are all connected, the upper polish rod (11) and the upper arc-shaped groove (15) are arranged in a staggered mode, the upper polish rod (11) penetrates through the through hole (10) of the valve pad (7) and then extends into the upper blind hole (17) of the top ring (8), and the upper polish rod (11) is connected with the valve pad (7) and the top ring (8) in a sliding sealing mode.

2. The natural gas compressor air valve according to claim 1, wherein a screw rod (5) is fixed in the valve seat (9), the screw rod (5) penetrates through the top ring (8) and the valve pad (7), the screw rod (5) is in sliding sealing connection with the top ring (8) and the valve pad (7), a spring (14) is sleeved on the screw rod (5) between the valve seat (9) and the top ring (8), the screw rod (5) penetrates through the inner ring (4), and a nut (6) is connected to the screw rod (5) above the inner ring (4) in a threaded manner.

3. A gas compressor valve according to claim 1, characterized in that the outer ring (1), the inner ring (4) and the plurality of sealing rings (3) are fixedly connected by means of a plurality of connecting rods (2).

4. The natural gas compressor air valve according to claim 1, wherein a vertical lower polish rod (12) is fixed at the lower end of the top ring (8), and the lower end of the lower polish rod (12) is slidably inserted into a lower blind hole (13) of the valve seat (9).

5. A gas valve for a natural gas compressor according to claim 1, characterized in that the valve pad (7) is of peek material and the top ring (8) is a metal ring.

6. A gas compressor valve according to claim 1, wherein the lower end of the outer ring (1) is in contact with the upper end of the valve seat (9).

7. A gas valve for a natural gas compressor according to claim 1, characterized in that the outer edges of the valve pad (7) and the top ring (8) are in sealing connection with the inner edge of the valve seat (9).