Air valve for reciprocating compressor

Abstract

The utility model relates to the technical field of compressors, in particular to an air valve for a reciprocating compressor, which comprises a valve seat. A limiting assembly is installed in the center of the top of the valve seat and comprises a limiting shaft coaxially fixed to the valve seat, the limiting shaft penetrates through the valve plate and the valve deck, and an inserting groove is formed in the outer wall of the limiting shaft. A limiting plate is inserted in the inserting groove, a limiting hole is formed in the top of the limiting plate, and the bottom end of the limiting plate abuts against the top of the valve deck. During installation, after the limiting shaft penetrates through the valve plate and the valve cover, the limiting plate is inserted into the insertion groove, the limiting plate is stably installed in the insertion groove under the insertion matching of the limiting rod and the limiting hole, and the valve cover can be limited and fixed under the action of the limiting plate; by means of the design, the air valve can be conveniently and rapidly installed, the problem that a nut is prone to loosening or disengaging in a traditional fixing mode is solved, and therefore long-term stable operation of the air valve is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to compressor technical field, concretely is a kind of air valve for reciprocating compressor. BACKGROUND

[0002] Reciprocating compressor is a kind of mechanical that transports gas and improves gas pressure, belongs to volumetric compressor, and reciprocating compressor is widely used in energy storage, pipeline pressure test, natural gas, petrochemical industry, sewage treatment, wind tunnel test, weapon manufacturing, bottle blowing, diving and other industries, with the characteristics of wide range of compressed medium, large pressure range, high thermal efficiency, strong adaptability etc.In reciprocating compressor, air valve as key component, its performance directly influences the exhaust capacity of compressor, exhaust temperature, power consumption and reliability of operation.

[0003] The utility model discloses a special gas compressor air valve, the special gas compressor air valve includes valve seat, lift limiter, valve piece, valve cover, spring, is connected screw rod on one side of valve seat, and valve cover is placed on screw rod and is locked by nut, the number of lift limiter is one and is annular, and lift limiter is placed on screw rod;The number of valve piece is one and is annular, and valve piece is placed on lift limiter, and valve piece and lift limiter are all arranged between valve seat and valve cover;Four spring grooves are provided on the side of valve cover towards valve piece along the circumferential direction, and the spring has four, and four springs are arranged in corresponding spring groove, and one end of each spring is all tightly contacted with valve piece;Valve cover, valve piece, valve seat are connected through positioning pin. By changing the shape of lift limiter, the original air valve's evenly distributed eight lift limiters are changed into one annular limiter, which is placed on the screw rod of valve seat to limit, and the improved limiter reduces the contact area. Reduce the number of springs and change the shape of spring, after improvement, the air valve changes from eight springs to four springs, reduces the abrasion, and plays the role of protecting valve piece and air valve. Change the structure of previous valve piece, double valve piece becomes single valve piece, ensure that air valve can guarantee its movement track after part of spring fails, while reducing the abrasion and fracture caused by different step of double valve piece.

[0004] Although the special gas compressor air valve has the effect of protecting valve piece and air valve, the device still has the following problems in actual use: in the device, the locking and fixing of valve cover and other structures are realized by screw rod and nut, however, in actual use process, considering the working environment and conditions of compressor air valve, such as vibration, the connection of screw rod and nut can be adversely affected, vibration can cause nut to gradually loosen, because vibration can constantly exert tiny displacement force on the connecting part, these displacement forces will accumulate under the action of long time, finally cause nut to loosen or even fall off, and then it is difficult to ensure the stable use of air valve, in view of this, we propose a kind of air valve for reciprocating compressor. The utility model discloses a valve for reciprocating compressor

[0005] In order to solve the above-mentioned difficult problem, the utility model provides a valve for reciprocating compressor.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the technical scheme as follows:

[0007] A valve for reciprocating compressor, including valve seat, the top of valve seat is equipped with valve piece, the top of valve piece is equipped with valve cover, the top of valve seat is equipped with a plurality of installation hole for installing spring,

[0008] The top center of valve seat is installed with limit component, and the limit component includes the limit shaft fixed coaxially with valve seat, the limit shaft passes through valve piece and valve cover, and the outer wall of limit shaft is provided with slot.

[0009] The inside of limit shaft is provided with sliding cavity above slot, and the sliding block is slidably installed in sliding cavity, the bottom end of sliding block is fixed coaxially with limit rod, and the bottom end of limit rod penetrates into slot and is inserted and matched with limit hole.

[0010] Further, the order coaxial fixed with the pull rod has a pull head, and the pull head is fixedly connected with the pull rod through bolts.

[0011] Further, one end of the limit plate is fixed with a limit block, and the limit block and the limit plate are an integral molding structure.

[0012] Further, the cross section shape of the installation hole is circular, and the plurality of installation holes are annularly and equidistantly distributed.

[0013] Further, the overall shape of the sliding block is cylindrical, and the size of the sliding block is matched with the size of the sliding cavity.

[0014] Further, the sliding block and the limit rod are an integral molding structure, and the sliding block and the limit rod are finished products made of stainless steel.

[0015] Further, the overall shape of the valve piece is circular, and the valve piece is a finished product made of high-performance thermoplastic material.

[0016] Compared with the prior art, the utility model has the beneficial effects:

[0017] By setting the limiting assembly: in the installation, the limiting shaft is inserted through the valve piece and the valve cover, the limiting plate is inserted into the slot, and the limiting plate is stably installed in the slot under the insertion and cooperation of the limiting rod and the limiting hole, and the limiting and fixing of the valve cover can be realized under the action of the limiting plate; the design not only facilitates the quick installation of the gas valve, but also avoids the problems of loose or separated nuts in the traditional fixing mode, thereby ensuring the long-term stable operation of the gas valve. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a whole structure schematic view of the utility model;

[0019] Figure 2 It is a whole explosion structure schematic view of the utility model;

[0020] Figure 3 It is a structure schematic view of the limiting assembly in the utility model;

[0021] Figure 4 It is a structure sectional view of the limiting assembly in the utility model;

[0022] Figure 5 It is an explosion structure schematic view of the limiting assembly in the utility model;

[0023] In the drawing:

[0024] 1, valve seat; 10, mounting hole;

[0025] 2, valve piece;

[0026] 3, valve cover;

[0027] 4, limiting assembly; 40, limiting shaft; 400, strip-shaped slot; 401, slot; 402, sliding cavity; 41, limiting plate; 410, limiting hole; 42, limiting block; 43, sliding block; 44, limiting rod; 45, pull rod; 46, spring; 47, pull head. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0029] The embodiment provides a technical solution:

[0030] Please refer to Figures 1-5As shown, a valve for reciprocating compressor, comprising a valve seat 1, a valve plate 2 is arranged above the valve seat 1, and a valve cover 3 is arranged above the valve plate 2; a plurality of mounting holes 10 for mounting springs are arranged on the top of the valve seat 1; a limiting assembly 4 is arranged at the center of the top of the valve seat 1, the limiting assembly 4 comprises a limiting shaft 40 coaxially fixed with the valve seat 1, the limiting shaft 40 penetrates through the valve plate 2 and the valve cover 3, and a slot 401 is arranged on the outer wall of the limiting shaft 40; a limiting plate 41 is inserted into the slot 401, a limiting hole 410 is arranged on the top of the limiting plate 41, and the bottom end of the limiting plate 41 abuts against the top of the valve cover 3; a sliding cavity 402 is arranged on the inside of the limiting shaft 40 above the slot 401, a sliding block 43 is slidably arranged in the sliding cavity 402, a limiting rod 44 is coaxially fixed to the bottom end of the sliding block 43, the bottom end of the limiting rod 44 penetrates into the slot 401 and is insertedly connected with the limiting hole 410; a pull rod 45 is coaxially fixed to the top end of the sliding block 43, and a spring 46 for abutting against the sliding block 43 is arranged on the outside of the pull rod 45.

[0031] In the embodiment, the pull rod 45 is coaxially fixed with a pull head 47, and the pull head 47 is fixedly connected with the pull rod 45 by a bolt. The pull head 47 facilitates pulling the pull rod 45, thereby facilitating adjusting the positions of the sliding block 43 and the limiting rod 44, and the bolt fixing mode has the advantages of firm installation and good stability.

[0032] In the embodiment, the limiting plate 41 is fixed with a limiting block 42 at one end, and the limiting block 42 is an integral molding structure with the limiting plate 41. The limiting block 42 plays a limiting role on the limiting plate 41, so that the limiting plate 41 can be inserted into the slot 401 to a fixed depth. The integral molding structure ensures the firmness and stability of the installation between the limiting block 42 and the limiting plate 41.

[0033] In the embodiment, the cross-sectional shape of the mounting hole 10 is circular, and the plurality of mounting holes 10 are annularly and equidistantly distributed. The plurality of mounting holes 10 facilitate uniformly mounting the springs, thereby facilitating ensuring the stable movement of the valve plate 2.

[0034] In the embodiment, the overall shape of the sliding block 43 is cylindrical, and the size of the sliding block 43 is matched with the size of the sliding cavity 402. This design facilitates the smooth sliding of the sliding block 43 in the sliding cavity 402, thereby ensuring the stability of the limiting rod 44.

[0035] In the embodiment, the sliding block 43 and the limiting rod 44 are an integral molding structure, and the sliding block 43 and the limiting rod 44 are both made of stainless steel. The integral molding sliding block 43 and the limiting rod 44 have better connection firmness, and the stainless steel has the advantages of high strength and corrosion resistance, thereby ensuring the service life of the sliding block 43 and the limiting rod 44.

[0036] In the embodiment, the overall shape of the valve disc 2 is circular, and the valve disc 2 is made of high-performance thermoplastic material. The circular structure of the valve disc 2 is more uniform in stress distribution under various working conditions, which helps to reduce the deformation and damage of the valve disc during operation, and improves the stability and service life of the valve disc 2. The valve disc 2 made of high-performance thermoplastic material has excellent high-temperature resistance, high-pressure resistance, corrosion resistance and other properties, and can maintain stable physical and chemical properties in harsh working environments, ensuring long-term reliable operation of the valve disc.

[0037] It should be noted that the outer wall of the limiting shaft 40 in the embodiment is provided with two strip-shaped grooves 400, and the strip-shaped grooves 400 are beneficial to the observation of the height of the sliding block 43 by the workers, thereby facilitating the workers to disassemble and assemble the limiting plate 41.

[0038] In specific use, the user first passes the limiting shaft 40 through the valve disc 2 and the valve cover 3, then inserts the limiting plate 41 into the slot 401, and pulls the pull head 47 upward, so that the pull rod 45 is driven to move upward, and the sliding block 43 is driven to move upward along the sliding cavity 402, and the limiting rod 44 is driven to move upward, and the spring 46 is compressed by the sliding block 43, and the limiting rod 44 is inserted into the sliding cavity 402, and when the limiting block 42 abuts against the outer wall of the limiting shaft 40, the user releases the pull head 47, and under the elastic action of the spring 46, the sliding block 43 moves downward and drives the limiting rod 44 to move downward, and the limiting rod 44 is inserted into the limiting hole 410, and the limiting plate 41 is fixed with the slot 401, and at this time, the valve cover 3 is fixed with the limiting shaft 40, and the installation is completed.

[0039] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only preferred examples of the utility model and do not limit the utility model. Without departing from the spirit and scope of the utility model, the utility model can also have various changes and improvements, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A valve for use in a reciprocating compressor, characterized by: The valve seat (1) is provided with a valve piece (2) above, and the valve piece (2) is provided with a valve cover (3) above; a plurality of mounting holes (10) for mounting springs are formed in the top of the valve seat (1); A limiting assembly (4) is installed at the top center of the valve seat (1), the limiting assembly (4) includes a limiting shaft (40) fixed coaxially with the valve seat (1), the limiting shaft (40) passes through the valve piece (2) and the valve cover (3), and the outer wall of the limiting shaft (40) is provided with a slot (401); a limiting plate (41) is inserted into the slot (401), the top of the limiting plate (41) is provided with a limiting hole (410), and the bottom end of the limiting plate (41) abuts against the top of the valve cover (3); The inside of the limiting shaft (40) is provided with a sliding cavity (402) above the slot (401), a sliding block (43) is slidably installed in the sliding cavity (402), the bottom end of the sliding block (43) is coaxially fixed with a limiting rod (44), the bottom end of the limiting rod (44) penetrates into the slot (401) and is inserted and matched with the limiting hole (410); the top end of the sliding block (43) is coaxially fixed with a pull rod (45), and the outer portion of the pull rod (45) is provided with a spring (46) for abutting against the sliding block (43).

2. The valve for a reciprocating compressor according to claim 1, characterized in that: The order of the pull rod (45) is coaxially fixed with a pull head (47), and the pull head (47) is fixedly connected with the pull rod (45) through bolts.

3. The valve for a reciprocating compressor according to claim 1, wherein: One end of the limiting plate (41) is fixed with a limiting block (42), and the limiting block (42) and the limiting plate (41) are an integral molding structure.

4. The valve for a reciprocating compressor according to claim 1, characterized in that: The cross-sectional shape of the mounting hole (10) is circular, and a plurality of mounting holes (10) are annularly and equally spaced.

5. The valve for a reciprocating compressor according to claim 1, wherein: The overall shape of the sliding block (43) is cylindrical, and the size of the sliding block (43) is matched with the size of the sliding cavity (402).

6. The valve for a reciprocating compressor of claim 1, wherein: The sliding block (43) and the limiting rod (44) are an integral molding structure, and the sliding block (43) and the limiting rod (44) are both finished products made of stainless steel.

7. The valve for a reciprocating compressor of claim 1, wherein: The overall shape of the valve piece (2) is circular, and the valve piece (2) is a finished product made of high-performance thermoplastic material.

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