CN113550888B

CN113550888B - Compression cylinder structure for piston compressor

Info

Publication number: CN113550888B
Application number: CN202110849892.2A
Authority: CN
Inventors: 胡小林
Original assignee: Fujian Air Separation Gas Co ltd
Current assignee: Fujian Air Separation Gas Co ltd
Priority date: 2021-07-27
Filing date: 2021-07-27
Publication date: 2023-02-10
Anticipated expiration: 2041-07-27
Also published as: CN113550888A

Abstract

The invention relates to the technical field of compressor equipment and discloses a compression cylinder structure for a piston compressor, which comprises a machine body, wherein a piston is movably sleeved in an inner cavity of the machine body, an air inlet valve is fixedly arranged on one side of the top of the machine body, an exhaust valve is fixedly arranged on the other side of the top of the machine body, and a gas delivery pipe is sleeved above the exhaust valve. This compression cylinder structure for piston compressor, the shrinkage pool cooperation of seting up through the setting of lug and piston top, the piston rises top and lug activity suit cooperation, make the piston can not damaged by the striking, simultaneously at the out of work back of discharge valve, shrinkage pool internal pressure reachs maximally, can promote movable post rebound, promote closure plate and baffle separation, can let in the ammonia at organism inner chamber top from the through-hole and discharge the gas-supply pipe, top pressure ammonia can quick release in the organism, and then the admission valve can be opened fast, the clearance can not increase, guarantee the working volume of organism, compressor work efficiency is higher.

Description

Compression cylinder structure for piston compressor

Technical Field

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

Background

In the 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 a piston compressor and comprises 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 negative pressure, the cylinder is filled with ammonia, the piston moves upwards to compress the ammonia after descending to a bottom point, the outlet valve enters an air hole of a lift limiter after receiving compressed air flow from the compression cylinder, the pressure is increased and then retreats to a valve plate compression spring to move, the air hole is opened, the ammonia is conveyed to a flow pipe, the piston moves downwards after ascending to a top point in the compression cylinder, and after the clearance air pressure at the top of the compression cylinder is equal to the air pressure at the back of the inlet valve, the inlet valve is opened, and the outlet valve is closed.

When the piston rises to the upper stop point, a certain clearance is kept between the upper surface of the piston and the valve seat and is called clearance, the volume formed by the clearance is called clearance volume, the clearance is used for preventing the piston from impacting the valve seat when the crank connecting rod mechanism is heated and extended to cause machine damage, and the abrasion of moving parts causes the fit clearance of parts to be enlarged to cause impact damage, and the left clearance can bring benefits to the assembly, operation and safe use of the compressor.

In the use process of the compressor, due to the existence of the clearance volume, the gas in the cylinder can not be completely discharged at the end of the exhaust process, a part of high-pressure gas remains in the clearance volume, so that before the next suction is started, the part of gas is firstly expanded and decompressed, and the suction can be started only when the pressure is reduced to be lower than the suction pressure, and the gas in the clearance volume expands to occupy a part of working volume, so that the suction amount is reduced, the working efficiency of the equipment is low, meanwhile, when the gas is compressed, part of gas in the gas can be condensed, the liquid is incompressible, a clearance is required to be left to prevent collision damage, but the condensed liquid can ascend and descend along with the upper surface of the piston, and the elimination effect of the liquid is poor.

Disclosure of Invention

The invention provides a compression cylinder structure for a piston compressor, which has the advantage of reducing the influence of a clearance on a working volume and solves the problem of reduction of the working volume caused by the movement of a piston when the pressure in the clearance is reduced.

The invention provides the following technical scheme: the utility model provides a compression cylinder structure for piston compressor, includes the organism, the inner chamber movable sleeve of organism is equipped with the piston, one side fixed mounting at organism top has the admission valve, the opposite side fixed mounting at organism top has discharge valve, discharge valve's top cover is equipped with the gas-supply pipe, the middle part integrated into one piece at organism inner chamber top has the lug, the shrinkage pool has been seted up at the top of piston, shrinkage pool and lug cooperation, open slot one has been seted up to the side of lug, the hole movable sleeve of lug is equipped with movable post, the middle part movable sleeve of movable post is equipped with the pillar, the top and the organism fixed mounting of pillar, the top and the lug fixed mounting that the lug hole just is located open slot one have the baffle, the surface of movable post just has the closure plate with baffle movable sleeve, the last fixed surface of closure plate installs spring one, the top fixed mounting of spring one has the baffle, baffle and organism fixed mounting, the through-hole has been seted up to one side of lug hole and the top that is located the baffle, the epicoele movable sleeve of through-hole has the valve post, the right side fixed mounting of valve post has spring two, the surface integrated into one at movable post top has the taper plate, the top fixed mounting of movable post has three springs.

Preferably, the inside of the pillar is provided with a communicating hole, and one side of the upper part of the movable pillar is provided with a second open slot matched with the top of the communicating hole.

Preferably, the upper part of the movable column is integrally formed with a movable plate, and the movable plate is arc-shaped and penetrates through the baffle plate to be matched with an inner cavity above the partition plate.

Preferably, the outer surface of each layer of the blocking plate is sleeved with a sealing ring, and the sealing ring is matched with the partition plate to have large sealing friction force.

Preferably, the matching surface of the partition plate and the blocking plate is in a step shape, the movable column is in a step structure, and the diameter of the lower part of the movable column is smaller than the inner hole with the minimum diameter of the partition plate.

The invention has the following beneficial effects:

this compression cylinder structure for piston compressor, the shrinkage pool cooperation of seting up through the setting of lug and piston top, the piston rises top and lug activity suit cooperation, make the piston can not damaged by the striking, simultaneously at the out of work back of discharge valve, shrinkage pool internal pressure reachs the biggest, can promote movable post rebound, promote closure plate and baffle separation, can let in the gas-supply pipe with the ammonia at organism inner chamber top from the through-hole and discharge, top pressure ammonia can the quick release in the organism, and then the admission valve can be opened fast, the clearance can not increase, guarantee the working volume of organism, compressor work efficiency is higher.

Drawings

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

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

FIG. 3 is a schematic top sectional view of the baffle plate and the movable plate of the present invention;

FIG. 4 is a schematic view of the piston moving to the top dead center position according to the present invention;

FIG. 5 is an enlarged view of the structure at A in FIG. 4 according to the present invention.

In the figure: 1. a body; 2. a piston; 3. an intake valve; 4. an exhaust valve; 5. a gas delivery pipe; 6. a bump; 7. concave holes; 8. a first open slot; 9. a movable post; 10. a pillar; 11. a partition plate; 12. a blocking plate; 13. a baffle plate; 14. a first spring; 15. a through hole; 16. a spool; 17. a second spring; 18. a conical plate; 19. a third spring; 20. a communicating hole; 21. a second open slot; 22. a movable plate.

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 obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Referring to fig. 1-5, a compression cylinder structure for a piston compressor comprises a body 1, a piston 2 movably sleeved in an inner cavity of the body 1, an air inlet valve 3 fixedly installed on one side of the top of the body 1, an exhaust valve 4 fixedly installed on the other side of the top of the body 1, a gas pipe 5 sleeved above the exhaust valve 4, a bump 6 integrally formed in the middle of the top of the inner cavity of the body 1, a concave hole 7 opened in the top of the piston 2, the concave hole 7 fitting with the bump 6, an open groove 8 opened on the side of the bump 6, a movable column 9 movably sleeved in the inner hole of the bump 6, a pillar 10 movably sleeved in the middle of the movable column 9, the top of the pillar 10 fixedly installed with the body 1, a partition 11 fixedly installed above the open groove 8, the inner surface of the movable column 9 movably sleeved with a blocking plate 12 on the partition 11, the matching surface of the partition 11 and the blocking plate 12 being stepped, the movable column 9 having a stepped structure, the diameter below being smaller than the smallest diameter of the inner hole of the partition 11, so that the movable column 9 can move the blocking plate 12 to drive the blocking plate 12 to move the blocking plate 11, the blocking plate 11 to move the blocking plate 11 by moving upward, the blocking plate 12 by a short distance, a spring 15 fixed on the upper surface of the upper fixed hole, a fixed block plate 13 fixed piston 1, a spring 15 fixed on one side of the upper fixed piston 2, and a baffle 13 fixed on the upper fixed baffle 13, and a fixed baffle 13 fixed on the upper fixed side of the upper fixed piston, and a fixed baffle 13, the top of the movable column 9 is fixedly provided with a spring III 19, the piston 2 rises to the top and is movably sleeved and matched with the lug 6, so that the piston 2 cannot be impacted and damaged, meanwhile, after the exhaust valve 4 does not work, the pressure in the concave hole 7 reaches the maximum, the movable column 9 can be pushed to move upwards, the blocking plate 12 is pushed to be separated from the partition plate 11, ammonia gas at the top of the inner cavity of the machine body 1 can be introduced into the gas conveying pipe 5 from the through hole 15 to be discharged, the pressure ammonia gas at the top in the machine body 1 can be quickly released, the gas inlet valve 3 can be quickly opened, the clearance cannot be increased, the working volume of the machine body 1 is ensured, the communicating hole 20 is formed in the support column 10, one side of the upper part of the movable column 9 is matched with the top of the communicating hole 20 to form an open groove II 21, the high-pressure ammonia gas in the concave hole 7 can be discharged, and the situation that the ammonia liquid can be generated in the continuous matching process when the compression each time is performed, the movable plate 22 is integrally formed at the upper part of the movable column 9, the movable plate 22 is arc-shaped and penetrates through the baffle 13 to be matched with an inner cavity above the partition 11, when the movable column 9 rises, negative pressure can be generated in the inner cavity above the partition 11, the generated negative pressure can quickly reduce the pressure in the top clearance of the inner cavity of the machine body 1, the air inlet valve 3 can be opened quickly, the influence of the clearance on the working volume is smaller, and after the hose is arranged at the bottom of the support 10, the ammonia deposited in the concave hole 7 can be sucked away, the service life of the piston 2 is further protected, the outer surface of each layer of the blocking plate 12 is sleeved with a sealing ring, the sealing friction force is large when the blocking plate 12 is matched with the partition 11, so that the movable column 9 needs larger pressure when moving upwards, after the blocking plate 12 is separated from the partition 11, the movable column 9 still has larger rising distance, and can drive the movable plate 22 to rise, and a larger negative pressure is generated, and the pressure in the clearance is reduced more quickly.

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

when the piston 2 rises, ammonia gas in the engine body 1 is pressurized to open the valve in the exhaust valve 4 to discharge the ammonia gas from the gas conveying pipe 5, when the piston 2 rises to the upper stop point, the lug 6 is matched with the concave hole 7 at the top of the piston 2, the pressure in the concave hole 7 is further increased, when the piston 2 rises to the upper stop point, the stepped structure of the movable column 9 can push the blocking plate 12, after the blocking plate 12 is separated from the partition plate 11, the blocking force applied to the movable column 9 is reduced, the movable column 9 continues to rise for a certain distance under the action of the pressure in the concave hole 7, the blocking plate 12 is separated from the partition plate 11 under the action of the movable column 9, the ammonia gas in the engine body 1 enters the through hole 15 through the partition plate 11, the cone plate 18 is separated from the valve column 16 when the movable column 9 moves upwards, the valve column 16 moves leftwards under the action of the second spring 17, the ammonia gas entering the through hole 15 can enter the gas conveying pipe 5 to be discharged, the movable column 9 also rises while the movable column 9 can generate negative pressure in the space above the partition plate 11, the air in the engine body 1 can absorb the gas more quickly, the gas in the rubber tube 10, the movable column 9 extends out of the bottom, the rubber tube 9, the movable column can collect the air inlet valve 12, and the air inlet valve 12, the air inlet valve 14 can be collected in the air inlet valve 12, and the air inlet valve 12.

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 various 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. The utility model provides a compression cylinder structure for piston compressor, includes organism (1), its characterized in that: inner chamber movable sleeve of organism (1) is equipped with piston (2), one side fixed mounting at organism (1) top has admission valve (3), the opposite side fixed mounting at organism (1) top has discharge valve (4), the top cover of discharge valve (4) is equipped with gas-supply pipe (5), the middle part integrated into one piece at organism (1) inner chamber top has lug (6), shrinkage pool (7) have been seted up at the top of piston (2), shrinkage pool (7) and lug (6) cooperation, open slot (8) have been seted up to the side of lug (6), the hole movable sleeve of lug (6) is equipped with movable column (9), the middle part movable sleeve of movable column (9) is equipped with pillar (10), the top and organism (1) fixed mounting of pillar (10), the top fixed mounting that lug (6) hole just is located open slot (8) has baffle (11), the surface of movable column (9) just is equipped with baffle (11) movable sleeve and baffle (11) has closure plate (12) with baffle (13), the last fixed mounting of closure plate (12) has spring (14), the top fixed mounting of a spring (14), baffle (13) side fixed mounting has baffle (13) top and baffle (13) below baffle (13) and baffle (13) the baffle (13) side baffle (13) and baffle (13) below installation baffle (13) the installation baffle (13) are located Be equipped with through-hole (15), the epicoele movable sleeve of through-hole (15) is equipped with column (16), the right side fixed mounting of column (16) has spring two (17), the surface integrated into one piece at activity post (9) top has taper plate (18), the top fixed mounting of activity post (9) has spring three (19).

2. The compression cylinder structure for a piston compressor as claimed in claim 1, wherein: a communicating hole (20) is formed in the support column (10), and a second open slot (21) is formed in one side of the upper part of the movable column (9) and matched with the top of the communicating hole (20).

3. The compression cylinder structure for a piston compressor as claimed in claim 1, wherein: a movable plate (22) is integrally formed on the upper portion of the movable column (9), and the movable plate (22) is arc-shaped and penetrates through the baffle (13) to be matched with an inner cavity above the partition plate (11).

4. The compression cylinder structure for a piston compressor as claimed in claim 1, wherein: the outer surface of each layer of the blocking plate (12) is sleeved with a sealing ring, and the sealing ring is matched with the partition plate (11) to have large sealing friction force.

5. The compression cylinder structure for a piston compressor as claimed in claim 1, wherein: the matching surface of the partition plate (11) and the blocking plate (12) is in a step shape, the movable column (9) is in a step structure, and the diameter of the lower part of the movable column is smaller than the inner hole with the minimum diameter of the partition plate (11).