CN113482885A

CN113482885A - Valve for piston compressor

Info

Publication number: CN113482885A
Application number: CN202110849143.XA
Authority: CN
Inventors: 胡小林
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-07-27
Filing date: 2021-07-27
Publication date: 2021-10-08

Abstract

The invention relates to the technical field of valve equipment and discloses a valve for a piston compressor, which comprises a lift limiter, wherein a valve seat is arranged on the lower surface of the lift limiter in a matched mode. This valve for piston compressor, screw-thread fit through vane and screw ring, the push rod reciprocates spacing cooperation with the vane, and the cooperation of flexible column ring and vane, make the compressor when compressing, it is rotatory to drive the vane, make flexible column ring rotatory drive volute spiral spring by the coiling, when the piston compression of compressor arrives the summit, there is not gas flow in the air guide ring, the vane reverses under the return effect of flexible column ring, make the vane shift up, drive the push rod and shift up, and then promote to see the valve block and shift up, seal the gas pocket, make the clearance high-pressure gas at top in the compressor before recovering intake pipe gas pressure equal, exhaust gas clearance can not flow back in the disk seat, can not further increase under the reflux in the assurance compressor, guarantee the working volume of compressor, the delivery gas flow is big.

Description

Valve for piston compressor

Technical Field

The invention relates to the technical field of valve equipment, in particular to a valve for a piston compressor.

Background

In an ammonia refrigeration system, a compressor, a condenser, a throttle valve and an evaporator are the most basic components, wherein the compressor is the main power source for the flow of ammonia in the whole system, the compressor is most commonly used as a piston compressor and consists of a compression cylinder, a piston and an inlet and outlet valve, when the piston moves downwards from the top, negative pressure is generated in the cylinder, the inlet valve is opened under the action of the negative pressure to fill ammonia into the cylinder, the piston moves upwards to compress the ammonia after descending to a bottom point, and the pressurized ammonia impacts the outlet valve to be opened to pressurize and convey the ammonia.

The air outlet valve enters an air hole of the lift limiter after receiving compressed air flow from the compression cylinder, the pressure is increased and then retreats to the valve plate to compress the spring to move, the air hole is opened, ammonia gas is conveyed to the runner pipe, the piston in the compression cylinder moves downwards after rising to the top, after the top clearance air pressure of the compression cylinder is equal to the back air pressure of the air inlet valve, the air inlet valve is opened, and the air outlet valve is closed.

When the existing air outlet valve is used, the piston moves continuously, pressure generated by ammonia compression can change suddenly to be large, a valve plate can compress a spring to impact a valve seat, impact force is large, the valve plate is easy to deform to cause the valve plate to have poor sealing performance on an air hole, the service life of the valve plate is short, meanwhile, after the piston rises to the top, air pressure in a clearance is high, after the valve plate compression spring is matched with the valve seat, the valve plate returns slowly, when the piston is pulled back, ammonia on the back of the valve plate can flow back to a part to drive the valve plate to close, the clearance in a compression cylinder is increased, the air pressure of the air valve is equal to the air pressure outside an air inlet valve, the piston needs to descend by a longer distance, and the working volume of a compressor is reduced.

Disclosure of Invention

The invention provides a valve for a piston compressor, which has the advantages that the impact part of a valve block is not matched with an air hole, the impact part is made of rubber and is not easy to damage, the service life is long, the valve block can be closed in time, the clearance cannot be increased, the working volume of a compression cylinder is ensured, and the problems that the valve block is easy to impact and damage, the service life is low, gas after the valve flows back into the clearance, and the working volume of the compression cylinder is reduced are solved.

The invention provides the following technical scheme: a valve for a piston compressor comprises a lift limiter, wherein a valve seat is arranged on the lower surface of the lift limiter in a matching way, an air hole is arranged in the lift limiter, a valve plate is sleeved on the upper surface of the valve seat, a spring is matched on the lower surface of the valve plate, the middle part of the lift limiter penetrates through the valve seat and is sleeved with a bolt, the lower end of the bolt is in threaded fit with a nut, the lower end of the valve seat is fixedly sleeved with an air guide ring, the outer surface of the middle part of the valve seat which protrudes is fixedly sleeved with a threaded ring, the outer surface of the threaded ring is in threaded fit with a rotary vane, a supporting ring is fixedly sleeved on the lower part of the outer surface of the threaded ring, the inner surface of the supporting ring and the nut are coaxially and movably sleeved with a telescopic column ring, a volute spiral spring is fixedly sleeved on the lower portion of the outer surface of the telescopic column ring, and a push rod is rotatably sleeved on the upper surface of the rotary vane.

Preferably, a gap air bag is installed in a winding gap of the spiral spring, a telescopic air bag is arranged at the bottom of the gap air bag, and the gap air bag is communicated with the telescopic air bag.

Preferably, the gap airbag has a smaller pitch as it approaches the axial center.

Preferably, the air holes are spirally opened.

Preferably, the upper part and the lower part of the telescopic column ring can only move up and down in a sleeved mode.

Preferably, the top of the push rod is made of rubber, and a gap is reserved between the top of the push rod and the valve plate when the volute spiral spring is in a relaxed state.

The invention has the following beneficial effects:

this valve for piston compressor, screw-thread fit through vane and screw ring, the push rod reciprocates spacing cooperation with the vane, and the cooperation of flexible column ring and vane, make the compressor when compressing, it is rotatory to drive the vane, make flexible column ring rotatory drive volute spiral spring by the coiling, when the piston compression of compressor arrives the summit, there is not gas flow in the air guide ring, the vane reverses under the return effect of flexible column ring, make the vane shift up, drive the push rod and shift up, and then promote to see the valve block and shift up, seal the gas pocket, make the clearance high-pressure gas at top in the compressor before recovering intake pipe gas pressure equal, exhaust gas clearance can not flow back in the disk seat, can not further increase under the reflux in the assurance compressor, guarantee the working volume of compressor, the delivery gas flow is big.

The valve for the piston compressor has the advantages that the closer the gap air bag is to the axis, the smaller the distance is, the lower the valve plate is opened by the push rod, the rotating speed of the rotary vane which drives the push rod to move downwards is higher than the distance of the telescopic air bag which drives the rotary vane to move upwards when the gap air bag in the middle of compression is conveyed, the valve plate can be ensured to be opened completely, after the compression is completed, no gas flows through the valve seat, the rotary vane has no influence on gas flow, under the recovery action of the volute spring, the distance of the rotary vane which drives the push rod to move upwards in the reverse rotation mode is larger than the distance of the rotary vane which drives the telescopic air bag to drive the telescopic column ring to move downwards when the gap air bag in the inner ring is relaxed, the push rod can push the valve plate to seal the air hole, when the gap air bag in the outer ring is fully relaxed, the descending distance of the rotary vane is larger, the push rod descends to be separated from the push rod, and a gap is reserved between the top and the valve plate when the volute spring is in the relaxed state, so that the compressor is extruded, the valve block is pushed by gas to move, the valve block is firstly contacted with the push rod to be opened by a certain distance, the gas is sprayed out to drive the rotary vane to rotate, then the push rod is driven to move downwards, the valve block is slowly and completely opened, the valve block is prevented from being deformed easily due to too large impact force between the valve block and the spring, the sealing effect between the valve block and the air hole is reduced, and the service life of the valve block is ensured.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention;

FIG. 2 is an enlarged view of the structure at A in FIG. 1 according to the present invention;

FIG. 3 is a schematic top view of the valve seat of the present invention;

FIG. 4 is a schematic diagram of a top view of the valve seat removing valve plate according to the present invention;

FIG. 5 is a schematic bottom view of the valve seat of the present invention.

In the figure: 1. a lift limiter; 2. a valve seat; 3. air holes; 4. a valve plate; 5. a spring; 6. a bolt; 7. a nut; 8. a gas guide ring; 9. a threaded ring; 10. rotating leaves; 11. a branch ring; 12. a telescopic column ring; 13. a volute spiral spring; 14. a push rod; 15. a clearance air bag; 16. a telescopic air bag.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, a valve for a piston compressor includes a lift limiter 1, a valve seat 2 is installed on a lower surface of the lift limiter 1 in a matching manner, an air hole 3 is formed inside the lift limiter 1, a valve plate 4 is sleeved on an upper surface of the valve seat 2, a spring 5 is installed on a lower surface of the valve plate 4 in a matching manner, a bolt 6 is sleeved on a middle portion of the lift limiter 1 and penetrates through the valve seat 2, a nut 7 is screwed on a lower end of the bolt 6, an air guide ring 8 is fixedly sleeved on a lower end of the valve seat 2, the air hole 3 is spirally formed, so that when the compressor is compressed and discharged, air pushes the valve plate 4 through the air hole 3 to compress the spring 5 to move and open the valve seat 2, the air flowing in the valve seat 2 is spirally discharged and can drive a rotary vane 10 to rotate, a threaded ring 9 is fixedly sleeved on a convex outer surface of the middle portion of the valve seat 2, the threaded ring 9 is screwed on the outer surface of the rotary vane 10, the lower part of the outer surface of the threaded ring 9 is fixedly sleeved with a supporting ring 11, the inner surface of the supporting ring 11 and the nut 7 are coaxially and movably sleeved with a telescopic column ring 12, the upper part and the lower part of the telescopic column ring 12 can only move in a vertically sleeved mode, so that when the rotary vane 10 rotates, the telescopic column ring 12 can be integrally driven to rotate, and the volute spring 13 is wound tightly, the lower part of the outer surface of the telescopic column ring 12 is fixedly sleeved with the volute spring 13, the upper surface of the rotary vane 10 is rotatably sleeved with a push rod 14, the top of the push rod 14 is made of rubber, a gap is reserved between the top of the push rod 14 and the valve plate 4 when the volute spring 13 is in a relaxed state, so that when the compressor is extruded, the gas pushes the valve plate 4 to move, the valve plate 4 is firstly contacted with the push rod 14 to be opened by a little distance, the gas is sprayed out to drive the rotary vane 10 to rotate, and further drive the push rod 14 to move downwards, the valve plate 4 is slowly and completely opened, and the valve plate 4 is prevented from being deformed easily due to large impact force between the valve plate 4 and the spring 5, the sealing effect between the valve plate 4 and the air hole 3 is poor, the service life of the valve plate 4 is ensured, when the compressor is compressed, the rotary vane 10 is driven to rotate, the telescopic column ring 12 rotates to drive the scroll spring 13 to be wound tightly, when the piston of the compressor is compressed to the top, no gas flows in the air guide ring 8, the rotary vane 10 is reversed under the return action of the telescopic column ring 12, the rotary vane 10 moves upwards to drive the push rod 14 to move upwards, the valve plate 4 is pushed to move upwards to seal the air hole 3, the exhaust gas in the valve seat 2 cannot flow back before the clearance high-pressure gas at the top in the compressor is restored to the same gas pressure of the air inlet pipe, the clearance in the compressor is ensured not to be further increased under the backflow action, the working volume of the compressor is ensured, the clearance air bag 15 is installed in the winding clearance of the scroll spring 13, the bottom of the clearance air bag 15 is provided with the telescopic air bag 16, the gap air bag 15 is communicated with the telescopic air bag 16, the closer the gap air bag 15 is to the axis, the smaller the distance is, the speed that the rotary vane 10 rotates to drive the push rod 14 to move downwards is larger than the distance that the compression middle gap air bag 15 conveys the telescopic air bag 16 to drive the rotary vane 10 to move upwards, the valve plate 4 can be ensured to be completely opened, no gas flows through the valve seat 2 after the compression is finished, the rotary vane 10 has no influence of gas flow, under the recovery action of the volute spring 13, the distance that the rotary vane 10 rotates reversely to drive the push rod 14 to move upwards is larger than the distance that the rotary vane 10 releases the inner gap air bag 15 to drive the telescopic column ring 12 to move downwards, the push rod 14 can push the valve plate 4 to seal the air hole 3, when the outer gap air bag 15 is completely released, the descending distance of the rotary vane 10 is larger, the push rod 14 descends to be separated from the push rod 14, the push rod 14 is sealed by the action of the spring 5, during the next compression operation, the valve plate 4 is not resisted by the push rod 14.

The working principle of the compressor valve of the invention is as follows:

the lift limiter 1 is arranged on a compressor, the upper surface of the lift limiter 1 faces the inside of the compressor, an air guide ring 8 is sleeved at the bottom end of a valve seat 2, a push rod 14 and a threaded ring 9 are sleeved with the valve seat 2 in a matching manner, when the compressor compresses and exhausts air, air flow impacts a valve plate 4 from the upper side of an air hole 3 to enable the valve plate 4 to be opened, the valve plate 4 is not opened completely under the limit of the push rod 14, the air flow sprayed out of the valve seat 2 rotates to impact a rotary vane 10 to drive the rotary vane 10 to rotate, the speed of the rotary vane 10 rotating to drive the push rod 14 to move downwards is larger than the speed of conveying the telescopic air bag 16 to drive the rotary vane 10 to move upwards by a compression middle gap air bag 15, the valve plate 4 can be completely opened by the compression spring 5 under the impact of the air flow, the compressor exhausts air normally, after the compression and the exhaust are finished, no air flows through the valve seat 2, the rotary vane 10 has no influence of the air flow, under the recovery action of a volute spring 13, the distance that the rotary vane 10 rotates to drive the push rod 14 to move upwards is greater than the distance that the rotary vane 10 releases in the inner ring gap air bag 15 to enable the telescopic air bag 16 to drive the telescopic column ring 12 to move downwards, the push rod 14 can push against the valve sheet 4 to seal the air hole 3, before the clearance high-pressure gas at the top in the compressor recovers to the same air pressure of the air inlet pipe, the discharged gas in the valve seat 2 cannot flow back, the clearance in the compressor cannot be further increased under the action of backflow, the working volume of the compressor is ensured, when the outer ring gap air bag 15 completely releases, the descending distance of the rotary vane 10 is larger, the push rod 14 descends to be separated from the push rod 14, the push rod 14 is closed by the action of the spring 5, and when the next compression work is carried out, the valve sheet 4 is not blocked by the push rod 14.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A valve for a piston compressor, comprising a lift limiter (1), characterized in that: the lift limiter is characterized in that a valve seat (2) is installed on the lower surface of the lift limiter (1) in a matched mode, an air hole (3) is formed in the lift limiter (1), a valve block (4) is installed on the upper surface of the valve seat (2) in a sleeved mode, a spring (5) is installed on the lower surface of the valve block (4) in a matched mode, a bolt (6) is installed in the middle of the lift limiter (1) and penetrates through the valve seat (2) in a sleeved mode, a nut (7) is installed on the lower end of the bolt (6) in a threaded matched mode, an air guide ring (8) is installed on the lower end of the valve seat (2) in a fixed sleeved mode, a threaded ring (9) is installed on the outer surface of the middle of the valve seat (2) in a protruding fixed sleeved mode, a rotary vane (10) is installed on the outer surface of the threaded ring (9) in a threaded matched mode, a support ring (11) is installed on the inner surface of the support ring (11) and a telescopic column ring (12) which is coaxially movably sleeved with the nut (7), the lower part of the outer surface of the telescopic column ring (12) is fixedly sleeved with a volute spiral spring (13), and the upper surface of the rotary vane (10) is rotatably sleeved with a push rod (14).

2. The valve for a piston compressor as claimed in claim 1, wherein: a gap air bag (15) is arranged in a winding gap of the scroll spring (13), a telescopic air bag (16) is arranged at the bottom of the gap air bag (15), and the gap air bag (15) is communicated with the telescopic air bag (16).

3. A valve for a piston compressor according to claim 2, wherein: the closer the clearance air bag (15) is to the axis, the smaller the distance is.

4. The valve for a piston compressor as claimed in claim 1, wherein: the air holes (3) are spirally formed.

5. The valve for a piston compressor as claimed in claim 1, wherein: the upper part and the lower part of the telescopic column ring (12) can only move up and down in a sleeved mode.

6. The valve for a piston compressor as claimed in claim 1, wherein: the top of the push rod (14) is made of rubber, and a gap is reserved between the top of the push rod (14) and the valve plate (4) when the volute spiral spring (13) is in a relaxed state.