An intake valve assembly for a gas compressor

Abstract

The present invention relates to the technical field of air intake valves, and specifically to an air intake valve assembly of a gas compressor, comprising a valve body, a valve plate, a first spring, a lift limiter, a left fulcrum module, and a right fulcrum module, wherein the valve plate comprises a left end, a spring portion, a valve mouth portion, and a right end from left to right, wherein the left end and the right end are respectively placed in the left fulcrum module and the right fulcrum module, wherein the right end is clamped and hinged by the right fulcrum module when the valve plate is closed, wherein the valve mouth portion is opened toward the inside of the valve body after receiving a set amount of pressure difference, wherein the left end is hinged to the left fulcrum module when the gas flow rate of the valve mouth portion reaches a set value, and wherein the first spring pushes the spring portion upward and restores the hinge of the right end to the right fulcrum module when the gas flow rate of the valve mouth portion is less than a set value. The present invention realizes long-term sealing of the air intake valve and makes the air intake process smoother by switching the fulcrum of the lever structure formed by the valve plate to change the force effect of the spring, thereby improving the compression efficiency of the compressor.

Description

Technical Field

[0001] The invention relates to the technical field of air intake valves, and in particular to an air intake valve assembly of a gas compressor. Background Art

[0002] A gas compressor is a device that compresses low-pressure gas into high-pressure gas. It is commonly used in the fields of air conditioning cooling and heating systems, liquefier boost systems, etc. As the core component of the gas compressor, the air intake valve is responsible for introducing external gas into the compressor and preventing the gas inside the compressor from escaping to the outside during the operation of the compressor. Depending on whether the gas compressor works continuously or not, the air intake valve can be divided into mechanical and driven types. In a continuously working gas compressor represented by a screw type, the air intake valve is controlled by air or electricity, and always remains in a normally open state during operation, and the opening and closing amount is adjusted in real time; while in an intermittent working gas compressor represented by a piston type, the state of the air intake valve will continuously switch between closed and closed. The present invention is based on a mechanical air intake valve that continuously switches between a closed state and is not driven by additional power.

[0003] During the operation of a piston gas compressor, the sealing of the intake valve is very important. Traditional intake valves only rely on the elastic deformation of the valve plate to control the opening and closing of the intake valve. However, as the number of opening and closing times increases, the plastic deformation of the valve plate will continue to accumulate. In other words, during the contact between the valve plate and the valve body, the gap between the two will become larger and larger, leading to the problem of insufficient sealing. At this time, the high-pressure gas in the compressor will rush to the outside, which will not only require greater suction force for the compressor, causing the power consumption of the compressor to increase; it will also cause the exhaust gas pressure to drop, affecting the working performance of the compressor. Fig. 9 Most of the prior art uses a spring to replace the elastic deformation of the valve plate, thereby maintaining the original shape of the valve plate and ensuring the long-term sealing of the intake valve. For example, in the patent with publication number CN110594134A, an elastic connector is used to buffer the impact between the valve plate and the valve body, thereby avoiding the destruction of air tightness caused by damage to the valve plate.

[0004] The existing technology can ensure the sealing of the intake valve for a long time, but it has caused related problems. The sealing of the intake valve is related to the elastic force of the spring. The greater the spring elastic force, the better the sealing of the intake valve. When a spring with a larger elastic force is selected, the downward movement of the valve plate will become difficult, so that the external gas will encounter greater resistance when entering the intake valve, resulting in a longer intake time, which in turn affects the compression efficiency of the compressor. Therefore, the improvement of sealing and compression efficiency are mutually exclusive. This mutual exclusion will be more obvious in the process of compressing and storing petroleum and natural gas. On the one hand, petroleum and natural gas are acidic, which will accelerate the aging of the spring; on the other hand, the valve plate that has been in oily gas for a long time will absorb grease and increase its own weight. These phenomena cause the initial elastic force of the spring to be at a larger value, so that there is enough elastic margin to cope with complex environments, thereby ensuring the long-term effectiveness of the intake valve seal. The method of mainly improving sealing will inevitably make the intake of the intake valve more difficult, thereby lowering the compression efficiency of the compressor.

[0005] In order to improve the sealing performance of an intake valve and the compression efficiency of a compressor at the same time, an intake valve assembly of a gas compressor is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide an intake valve assembly for a gas compressor, which solves the problem that the improvement of the sealing of the intake valve in the petroleum and natural gas liquefier will seriously affect the compression efficiency of the compressor. By switching the fulcrum of the lever structure formed by the valve plate, the force effect of the spring is changed, thereby achieving long-term effectiveness of the intake valve sealing and making the intake process smoother, thereby improving the compression efficiency of the compressor.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] An intake valve assembly for a gas compressor includes a valve body, a valve plate, a first spring, a lift limiter, a left fulcrum module, and a right fulcrum module. The valve body includes an upper valve body and a lower valve body. The valve plate includes a left end, a spring portion, a valve mouth portion, and a right end from left to right. The left end and the right end are respectively placed in the left fulcrum module and the right fulcrum module, and the spring portion is above the first spring.

[0009] When the valve plate is closed, the right end is clamped by the right fulcrum module and hinged with the right fulcrum module. After the valve mouth is subjected to a set pressure difference, it opens toward the inside of the valve body and makes the left end and the right end move downward along the left fulcrum module and the right fulcrum module respectively. When the gas flow rate of the valve mouth reaches a set value, the left end is hinged with the left fulcrum module, and when the gas flow rate of the valve mouth is less than the set value, the first spring pushes the spring part upward and restores the hinge of the right end with the right fulcrum module.

[0010] The existing mechanical intake valve has an elastic connection to buffer the impact between the valve body and the valve plate, so that the valve plate can maintain its original shape for a long time, thereby making the intake valve have good sealing performance. However, this sealing performance is based on certain premises. The sealing quality is directly related to the actual performance of the elastic connection. If the elastic connection is repeatedly deformed too much, it will be easily damaged, which will cause frequent sealing problems. It can be seen that this problem can be well solved by a lift limiter. The lift limiter can limit the descending distance of the valve plate, thereby preventing excessive deformation from causing the elastic connection to be damaged too quickly. However, this will cause another problem. The valve plate has a limited descending distance, and the outlet area of ​​the gas channel constructed by it is also limited, which will increase the power consumption of the compressor during the intake process and is not conducive to improving the compression efficiency.

[0011] Preferably, the right fulcrum module includes a right main body, a right clamp, a second spring, a right baffle, and a right fixed block, the right main body being connected to the right inner wall of the lower valve body, and a right groove being opened on the right main body, the right groove wrapping the right end, the two right clamps being symmetrically inserted into the front and rear sides of the right main body, the two second springs being respectively connected to the other ends of the opposite ends of the two right clamps, the two right baffles being symmetrically connected to the front and rear surfaces of the right main body, the right fixed block being attached to the side of the right baffle away from the right main body, the front and rear sides of the right end being symmetrically provided with first side edges, the first side edges being provided with a semi-cylindrical structure, and the lower part of the first side edges being provided with a plane, the first convex body being provided on the opposite side of the two right clamps, the first convex body including a first inclined surface and a second inclined surface from top to bottom, and the angle between the first inclined surface and the vertical surface is greater than that of the second inclined surface.

[0012] When the right end is hinged to the right fulcrum module, the first side edge is pressed against the first inclined surface, and the plane below the first side edge will have a large friction with the first inclined surface, making it difficult for the left end to move downward. Then, when the pressure difference between the outside and the inside of the valve body reaches the set value, the right end will move downward first. When the right end is hinged to the right fulcrum module again, the resistance between the arc surface of the first side edge and the second inclined surface during the upward movement of the right end can be ignored. And through these designs, the valve plate is tilted with the left side higher and the right side lower in the intake state, which not only effectively reduces the deformation of the first spring to ensure its life and avoid frequent intake valve sealing problems, but also increases the outlet area of ​​the gas channel of the valve mouth structure, thereby accelerating the inflow of gas, reducing the power consumption of the compressor, and improving the compression efficiency.

[0013] Preferably, the right clamp also includes a right support rod, the right support rod is inserted into the second spring and passes through the right baffle and the right fixing block, and the right support rod is provided with a thread at one end away from the first side edge, and the right fixing block uses a nut that matches the thread on the right support rod. On the one hand, the nut is a standard part with low cost and easy installation; on the other hand, the tightness between the first side edge and the first convex body can be adjusted by adjusting the screwing depth of the nut on the right support rod, and then the intake valve can be adapted to various compression ratio environments through debugging, thereby enhancing the versatility of the intake valve.

[0014] The existing mechanical intake valves used in compressors of oil and natural gas liquefiers will condense grease on the valve plate during long-term use. Grease has adhesive force, which will cause the valve plate to adhere to the valve body, resulting in a prolonged separation process. The valve plate will also accumulate a certain amount of energy during the separation process, which will intensify the collision with the lift limiter and make it easy to be damaged. This will affect the tightness of the connection between the valve plate and the valve body, that is, the sealing of the intake valve, resulting in increased power consumption and reduced performance of the compressor.

[0015] Preferably, the left end includes an end, a third spring, and an extension portion, the end being on the left side of the spring portion, the third spring being inserted into the end, the extension portion including a shell and an extension rod, the shell being sleeved on the end, the extension rod being connected inside the shell, and the extension rod being inserted into the end and resting against the third spring, the third spring makes the distance between the end and the shell be in a floating state, thereby making the left and right lengths of the valve plate float, on the one hand, when the valve plate is in an inclined posture, it can also rely on the left and right ends to be tightened in the left fulcrum module and the right fulcrum module respectively to avoid falling off; on the other hand, the above-mentioned tightening effect also eliminates the clearance between the left and right ends and the left fulcrum module and the right fulcrum module respectively, thereby reducing the impact of the valve plate during its descent, and the third spring itself also has a buffering effect, thereby avoiding severe collisions, which not only eliminates the sealing problems caused thereby, but also ensures the life of the valve plate, thereby extending the service life of the intake valve.

[0016] The valve plate has two working states. One is that the right end is hinged to the right fulcrum module, so that the elastic force of the first spring is in a labor-saving state, thereby more stably pressing against the valve plate to ensure the sealing of the intake valve; the other is that the left end is hinged to the left fulcrum module, so that the pressure difference between the external gas and the gas in the valve is in a labor-saving state, thereby increasing the distance the valve mouth descends and facilitating the entry of gas. In both states, there are certain requirements for the stability of the fulcrum, especially when the right end is hinged to the right fulcrum module.

[0017] Preferably, the front and rear sides of the shell are symmetrically provided with a second side edge, and the upper part of the second side edge is set as a plane, the left fulcrum module includes a left main body, a left clamp, a fourth spring, a left baffle, a left fixed block, and a pneumatic assembly, the left main body is connected to the left inner wall of the lower valve body, and a left groove is provided on the left main body, the left groove wraps the shell, the two left clamps are symmetrically inserted into the front and rear sides of the left main body, the two fourth springs are respectively connected to the other ends of the opposite ends of the two left clamps, the two left baffles are symmetrically connected to the front and rear surfaces of the left main body, the left fixed block is attached to the side of the left baffle away from the left main body, the pneumatic assembly is installed above the left main body, the two left clamps are provided with a second convex body on the opposite side, and the second convex body is provided with a third inclined surface. When the shell moves downward, the arc surface of the second side edge contacts the third inclined surface, and the resistance therebetween is small and easy to pass; when the shell wants to move upward, the plane above the second side edge presses against the lower part of the second convex body, which cannot be realized.

[0018] When the intake valve completes intake, the upward blockage of the housing needs to be released so that the elastic force of the first spring is converted from a laborious state to a labor-saving state, thereby completing a good seal of the intake valve.

[0019] Preferably, the pneumatic assembly includes a main shaft, a moving impeller, a stationary impeller, a bearing, and a cam. The two main shafts are respectively inserted into the front and rear sides of the left main body. The moving impeller is sleeved on the protruding end of the main shaft and is rotatably connected, which can not only guide the gas at the corner of the valve body to speed up the speed of air intake, but also assist the stationary impeller to provide power for the rotation of the main shaft. The stationary impeller, bearing, and cam are connected to the main shaft in sequence from the protruding end to the inserted end of the main shaft.

[0020] Preferably, the end face of the cam close to the end where the main shaft extends is a plane, and the other end face of the cam is an inclined surface. A boss is arranged above the left clamp, and the boss is between the bearing and the cam and close to the inclined surface of the cam. Upper bosses and lower bosses are symmetrically arranged on the front and rear end faces of the left main body, and the upper bosses and lower bosses are respectively arranged above and to the right of the main shaft to limit the angle at which the main shaft drives the cam to rotate. The stationary impeller includes an eccentric impeller, which is located between the upper boss and the lower boss, and the eccentric impeller contacts the lower boss in a natural state; when the air intake speed is faster, the eccentric impeller contacts the upper boss, and makes the cam slope on the narrower side in the left-right direction face the boss, so that the left clamp works freely, that is, keeps the blockade of the upward movement of the shell; when the wind speed decreases, that is, the air intake process is about to end, the eccentric impeller resets under the action of its own gravity, so that the cam slope on the wider side in the left-right direction contacts and pushes the boss, so that the second convex body moves a certain distance into the slot, so that the plane above the second side edge is misaligned with the bottom of the second convex body, thereby releasing the blockade of the upward movement of the shell, completing the conversion of the fulcrum, and making the intake valve better sealed.

[0021] The valve plate will contact multiple surfaces and corners when it is hinged, moving up or down. The structure of each surface and corner should be optimized to make the movement of the valve plate smoother and the performance of the intake valve stronger.

[0022] Preferably, the left groove and the right groove are parallel, and the distance between them is always the same, so as to avoid the valve plate from expanding and contracting too much instantly, thereby causing structural damage and external impact, thereby effectively alleviating the impact inside the intake valve and extending the life of the intake valve. A clamping groove is provided on the left groove, and the clamping groove wraps the left clamping piece. A clamping edge is provided below the right groove, and the clamping groove is parallel to the clamping edge, so as to provide a limit downward position for the valve plate.

[0023] Preferably, the left groove and the right groove are configured as rectangular grooves, and the right side surface of the right end and the left side surface of the shell are configured as arc surfaces, so that the right end and the shell are in linear contact with the right groove and the left groove, respectively, which not only reduces friction, makes the upward or downward movement faster, and avoids heat accumulation, but also provides good conditions for rotation during hinge connection. The left groove and the right groove have protruding lower edges and upper edges, respectively, and the lower edges and the upper edges are both rounded, which helps to protect the surface of the valve plate and also makes the rotation of the valve plate smoother during hinge connection.

[0024] When compressing petroleum and natural gas, the upper surface of the valve mouth is in contact with the external oily gas for a long time, which will accumulate a lot of grease. On the one hand, it will improve the quality of the valve mouth and be unfavorable for sealing; on the other hand, it will cause the valve mouth to adhere to the air inlet, thereby affecting the compression efficiency.

[0025] Preferably, the upper valve body and the lower valve body are respectively provided with an air inlet and an air outlet, and the air inlet and the air outlet are respectively located above and below the valve mouth, and the lower end surface of the air inlet is set as an inclined surface with a lower left side and a higher right side, and the upper end surface of the valve mouth is set as an inclined surface with a higher left side and a lower right side. On the one hand, such a design further increases the air outlet area of ​​the gas channel of the valve mouth structure, which is conducive to the entry of gas, thereby increasing the compression efficiency and reducing the compression energy consumption; on the other hand, the stronger airflow during air intake can blow off the grease accumulated on the upper surface of the valve mouth, and the setting of the valve mouth with a higher left side and a lower right side is more conducive to the discharge of grease, reducing the influence of grease accumulation on the sealing of the intake valve.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention sets two fulcrum states for the valve plate, so that when the valve plate is closed, the elastic force of the first spring can be in a labor-saving state by means of the hinge between the right end and the right fulcrum module, while the pressure difference on the valve mouth is in a labor-intensive state, thereby ensuring the sealing of the intake valve; when the valve plate is opened, a larger intake port area can be constructed by means of the inclined posture of the left higher and the right lower, which is conducive to the entry of gas. In this way, the sealing of the intake valve can be made effective for a long time, and the compression efficiency of the compressor can be improved by accelerating the intake speed.

[0028] 2. The present invention accelerates the gas flow at the corner of the valve body through the pneumatic component, thereby increasing the intake speed of the intake valve. At the same time, the influence of the gas on the eccentric impeller in the pneumatic component is used to control the hinge state of the right end, so that the right end can be released from the hinge with the right groove near the end of the intake process, thereby converting the elastic force of the first spring from a laborious state to a labor-saving state, thereby completing the sealing of the intake valve.

[0029] 3. The present invention not only produces the above-mentioned effect of facilitating air intake by inclining the valve plate to the upper left and lower right when the valve plate is in the left fulcrum state, but also reduces the deformation of the first spring, thereby extending its service life and making the intake valve more reliable. At the same time, with the setting of the valve mouth being higher on the top and lower on the bottom, the grease accumulated on the upper surface of the valve mouth can be better discharged to ensure the sealing of the intake valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall front view and full cross-section structure of the present invention;

[0031] Figure 2 It is a schematic diagram of the internal isometric structure of the lower valve body of the present invention;

[0032] Figure 3 For the present invention Figure 2 Schematic diagram of the structure of part B;

[0033] Figure 4 For the present invention Figure 3 Schematic diagram of the structure of part C;

[0034] Figure 5 For the present invention Figure 2 Schematic diagram of the structure of part A;

[0035] Figure 6 This is a schematic diagram of the valve plate in the closed state of the present invention;

[0036] Figure 7 It is a schematic diagram of the initial expansion and pre-closing states of the valve plate of the present invention;

[0037] Figure 8 This is a schematic diagram of the valve plate of the present invention in a fully expanded state;

[0038] Fig. 9 It is a mechanical intake valve in the prior art.

[0039] In the figure: 1, valve body; 11, upper valve body; 111, air inlet; 12, lower valve body; 121, air outlet; 2, valve plate; 21, left end; 211, end; 212, third spring; 213, extension; 2131, shell; 21311, second side edge; 21312, left side; 2132, extension rod; 22, spring part; 23, valve mouth; 24, right end; 241, first side edge; 242, right side; 3, first spring; 4, lift limiter; 5, left fulcrum module; 51, left main body; 511, left groove; 5111, card slot; 5112, lower edge; 512, upper boss; 513, lower boss; 52. Left clamp; 521. Second convex body; 5211. Third inclined surface; 522. convex column; 53. Fourth spring; 54. Left baffle; 55. Left fixed block; 56. Pneumatic assembly; 561. Main shaft; 562. Moving impeller; 563. Stationary impeller; 5631. Eccentric impeller; 564. Bearing; 565. Cam; 6. Right fulcrum module; 61. Right main body; 611. Right groove; 6111. Clamp edge; 6112. Upper edge; 62. Right clamp; 621. First convex body; 6211. First inclined surface; 6212. Second inclined surface; 622. Right support rod; 63. Second spring; 64. Right baffle; 65. Right fixed block. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] See also Figures 1 to 9 The present invention provides an intake valve assembly for a gas compressor, and the technical solution is as follows:

[0042] An intake valve assembly of a gas compressor includes a valve body 1, a valve plate 2, a first spring 3, a lift limiter 4, a left fulcrum module 5, and a right fulcrum module 6. The valve body 1 includes an upper valve body 11 and a lower valve body 12. The upper valve body 11 and the lower valve body 12 are sealed to ensure the sealing of the intake valve and avoid affecting the compression energy consumption and compression efficiency. The valve plate 2 includes a left end 21, a spring part 22, a valve mouth part 23, and a right end 24 from left to right. The main part of the valve plate 2 is made of aluminum material to make the working process more stable by light weight. For the convenience of manufacturing, cast aluminum can be used for one-piece molding. The left end 21 and the right end 24 are respectively placed in the left fulcrum module 5 and the right fulcrum module 6. The left fulcrum module 5 and the right fulcrum module 6 can be welded to the lower surface of the upper valve body 11 to facilitate subsequent disassembly and maintenance. The spring portion 22 is above the first spring 3 and has no connection with the first spring 3 to avoid damage to the first spring 3 due to excessive pulling when the valve plate 2 is tilted. Therefore, in order to ensure that the first spring 3 does not detach, the depth of its extension into the lift limiter 4 must be guaranteed. It is best to arrange some protrusions on the circumference inside the lift limiter 4 to limit the axial movement of the first spring 3.

[0043] When the valve plate 2 is closed, the right end 24 is clamped by the right fulcrum module 6 and hinged to the right fulcrum module 6. After the valve mouth part 23 is subjected to the set pressure difference, it opens toward the inside of the valve body 1 and makes the left end 21 and the right end 24 move downward along the left fulcrum module 5 and the right fulcrum module 6 respectively. When the gas flow rate of the valve mouth part 23 reaches the set value, the left end 21 is hinged to the left fulcrum module 5, and when the gas flow rate of the valve mouth part 23 is less than the set value, the first spring 3 pushes the spring part 22 upward and restores the hinge connection between the right end 24 and the right fulcrum module 6.

[0044] As an embodiment of the present invention, refer to Figures 1 to 4The right fulcrum module 6 includes a right main body 61, a right clamp 62, a second spring 63, a right baffle 64, and a right fixed block 65. The outer contour of the right main body 61 is a right-angled trapezoid, which is welded on the lower surface of the upper valve body 11 and rests on the right inner wall of the lower valve body 12. A right groove 611 is provided on the right main body 61, and the right groove 611 is parallel to the inclined surface of the right trapezoid of the right main body 61, so that the extension length of the right end 24 in the right groove 611 is relatively stable to ensure the stability of the valve plate 2 during movement. The two right clamps 62 are symmetrically inserted into the front and rear sides of the right main body 61, and the other side of the opposite side is provided with a right support rod 622, and the right support rod 622 is arranged with a thread at one end away from the right clamp 62, and the thread is connected with the nut of the right fixed block 65. On the one hand, the nut is a standard part with low cost and easy installation; on the other hand, the tightness between the first side edge 241 and the first convex body 621 can be adjusted by adjusting the screwing depth of the nut on the right support rod 622, and then the intake valve can be adapted to various compression ratio environments through debugging, thereby enhancing the versatility of the intake valve. When connecting, two right fixing blocks 65 can be screwed into the right support rod 622 to achieve the purpose of pre-tightening and loosening. The second spring 63 is wrapped around the right support rod 622, and the two ends are respectively pressed against the side of the right clamp 62 and the side of the right baffle. The first side edge 241 is symmetrically arranged on the front and rear sides of the right end 24. The first side edge 241 is arranged as a semi-cylindrical structure, which is integrally formed with the right end 24, and the lower part of the first side edge 241 is arranged as a plane, so that the plane has the same slope as the first inclined surface 6211, which can better hinder the downward movement of the right end 24, but this will accelerate the wear between the first side edge 241 and the first inclined surface 6211. Therefore, if such a setting is required, the surface of the first side edge 241 and the first convex body 621 can be strengthened, such as spraying a wear-resistant coating. The first convex body 621 is arranged on the opposite side of the two right clamps 62. The first convex body 621 includes a first inclined surface 6211 and a second inclined surface 6212 from top to bottom, and the angle between the first inclined surface 6211 and the vertical plane is greater than that of the second inclined surface 6212. When the right end 24 is hinged to the right fulcrum module 6, the first side edge 241 is pressed against the first inclined surface 6211, and the plane below the first side edge 241 will have a large friction with the first inclined surface 6211, making it difficult for the left end 21 to move downward, and then when the pressure difference between the outside and the inside of the valve body 1 reaches the set value, the right end 24 will move downward first. When the right end 24 is hinged to the right fulcrum module 6 again, the resistance between the arc surface of the first side edge 241 and the second inclined surface 6212 during the upward movement of the right end 24 can be ignored. And through these designs, the valve plate 2 is tilted in a state of low left and high right in the intake state, which not only effectively reduces the deformation of the first spring 3 to ensure its life and avoid frequent problems with the sealing of the intake valve, but also increases the outlet area of ​​the gas channel constructed by the valve mouth 23, thereby accelerating the inflow of gas, reducing the power consumption of the compressor, and improving the compression efficiency.

[0045] As an embodiment of the present invention, refer to Figure 2 , Figure 5 and Fig. 9 The left end 21 includes an end 211, a third spring 212, and an extension 213. The end 211 is on the left side of the spring 22 and belongs to the main body of the valve plate 2. There are two blind holes inside for placing the third spring 212. The extension 213 includes a shell 2131 and a stretch rod 2132. The shell 2131 is sleeved on the end 211 and slides on the end 211 under the action of the third spring 212. The stretch rod 2132 is connected to the inside of the shell 2131, and the stretch rod 2132 is inserted into the end 211 and abuts against the third spring 212. The third spring 212 makes the distance between the end 211 and the shell 2131 in a floating state, thereby making the left and right lengths of the valve plate 2 float. On the one hand, when the valve plate 2 is in an inclined posture, it can also rely on the left end 21 and the right end 24 to be respectively The left fulcrum module 5 and the right fulcrum module 6 are tightened to prevent them from falling off; on the other hand, the above-mentioned tightening effect also eliminates the clearance between the left end 21 and the right end 24 and the left fulcrum module 5 and the right fulcrum module 6 respectively, which reduces the impact of the valve plate 2 during its descent, and the third spring 212 itself also has a buffering effect, thereby avoiding the situation in which the existing mechanical intake valve is used for petroleum and natural gas liquefaction, which will cause the valve plate and the valve body to collide violently. This not only eliminates the sealing problem caused by this, but also ensures the life of the valve plate 2, thereby extending the service life of the intake valve.

[0046] The valve plate 2 has a clear limit of expansion and contraction during the movement process: when the valve plate 2 is closed, the length of the valve plate 2 is the smallest; when the valve plate 2 is fully opened, the length of the valve plate 2 is the largest. These two states should be within the deformation range of the third spring 212 and can adapt well without causing strength problems due to repeated expansion and contraction.

[0047] As an embodiment of the present invention, refer to Figure 2 and Figure 5The front and rear sides of the housing 2131 are symmetrically provided with second side edges 21311, and the upper part of the second side edges 21311 is set as a plane. The left fulcrum module 5 includes a left main body 51, a left clamp 52, a fourth spring 53, a left baffle 54, a left fixing block 55, and a pneumatic assembly 56. The left main body 51 has the same right-angle trapezoidal outer contour as the right main body 61. The left main body 51 is welded to the lower surface of the upper valve body 11, and leans against the left inner wall of the lower valve body 12 after the upper valve body 11 and the lower valve body 12 are connected. A left groove 511 is provided on the left main body 51. The left groove 511 is parallel to the right groove 611 and both are arranged as rectangular grooves. On the one hand, the distance between the left groove 511 and the right groove 611 is always consistent to prevent the valve plate 2 from expanding and contracting too much in an instant to cause structural damage and external impact, thereby effectively alleviating the impact inside the intake valve and extending the life of the intake valve; on the other hand, the right side surface 242 of the right end 24 and the left side surface 21312 of the shell 2131 are arranged as arc surfaces, so that the right end 24 and the shell 2131 are in line contact with the right groove 611 and the left groove 511 respectively, which not only reduces friction and makes the upward or downward movement faster, but also avoids heat accumulation and provides good conditions for rotation during hinge connection. The left groove 511 and the right groove 611 have a protruding lower edge 5112 and an upper edge 6112, respectively. The lower edge 5112 and the upper edge 6112 are rounded. The rounded corners help protect the surface of the valve plate 2 and make the valve plate 2 rotate more smoothly when hinged. A clamping groove 5111 is provided on the left groove 511 to wrap the housing 2131. A clamping edge 6111 is provided below the right groove 611. The clamping groove 5111 is parallel to the clamping edge 6111, so that the valve plate 2 has an extreme position when it moves downward, thereby ensuring the stability of the movement of the valve plate 2 and making the intake valve more reliable.

[0048] The two left clamps 52 are symmetrically inserted into the front and rear sides of the left main body 51, the two fourth springs 53 are respectively connected to the other ends of the opposite ends of the two left clamps 52, the two left baffles 54 are symmetrically connected to the front and rear surfaces of the left main body 51, the left fixing block 55 is attached to the side of the left baffle 54 away from the left main body 51, the pneumatic assembly 56 is installed above the left main body 51, and the second convex body 521 is provided on the opposite side of the two left clamps 52, and the third inclined surface 5211 is provided on the second convex body 521. When the housing 2131 moves downward, the arc surface of the second side edge 21311 contacts the third inclined surface 5211, and the resistance therebetween is small, and it is easy to pass; when the housing 2131 wants to move upward, the plane above the second side edge 21311 presses against the bottom of the second convex body 521, which cannot be achieved.

[0049] As an embodiment of the present invention, refer to Figure 2 and Figure 5The pneumatic assembly 56 includes a main shaft 561, a moving impeller 562, a stationary impeller 563, a bearing 564, and a cam 565. The two main shafts 561 are respectively inserted into the front and rear sides of the left main body 51. The moving impeller 562 is sleeved on the protruding end of the main shaft 561 and is rotatably connected. It can not only dredge the gas at the corner of the valve body 1 to speed up the speed of air intake, but also assist the stationary impeller 563 in providing power for the rotation of the main shaft 561. When the stationary impeller 563 rotates to a certain angle, it will remain relatively still with the main shaft 561. In order to reduce the obstruction of the stationary impeller 563 to the gas flow, the volume of the stationary impeller 563 should be much smaller than the moving impeller 562. The stationary impeller 563, the bearing 564, and the cam 565 are connected to the main shaft 561 in sequence from the protruding end to the inserted end of the main shaft 561. The end face of the cam 565 near the end where the main shaft 561 is inserted is a plane, and the other end face of the cam 565 is an inclined surface, which will frequently contact the boss 522 above the left clamp 52, so the inclined surface needs to be reinforced to enhance wear resistance. The upper boss 512 and the lower boss 513 are symmetrically arranged on the front and rear end faces of the left main body 51. The upper boss 512 and the lower boss 513 are respectively arranged above and to the right of the main shaft 561 to limit the angle of rotation of the cam 565 driven by the main shaft 561, and the upper boss 512 should be arranged directly above or slightly to the right of the upper side to avoid affecting the reset of the eccentric impeller 5631. The stationary impeller 563 includes an eccentric impeller 5631, which is located between the upper boss 512 and the lower boss 513, and the eccentric impeller 5631 is in contact with the lower boss 513 in a natural state; when the air intake speed is fast, the eccentric impeller 5631 is in contact with the upper boss 512, and the inclined surface of the cam 565 is directed toward the boss 522 on the narrower side in the left-right direction, so that the left clamp 52 can work freely, that is, the upward movement of the housing 2131 is kept blocked; when the wind When the speed decreases, that is, when the intake process is about to end, the eccentric impeller 5631 is reset under the action of its own gravity, so that the inclined surface of the cam 565 contacts and pushes the boss 522 on the wider side in the left and right directions, so that the second convex body 521 moves a certain distance into the groove 5111, so that the plane above the second side edge 21311 is misaligned with the bottom of the second convex body 521, thereby releasing the blockade of the upward movement of the shell 2131, completing the conversion of the fulcrum, and making the intake valve better sealed.

[0050] As an embodiment of the present invention, refer to Figure 1The upper valve body 11 and the lower valve body 12 are respectively provided with an air inlet 111 and an air outlet 121, which are respectively located above and below the valve mouth part 23, and the lower end surface of the air inlet 111 is set as a slope with a lower left and a higher right, and the upper end surface of the valve mouth part 23 is set as a slope with a higher left and a lower right, which fits tightly with the lower end of the air inlet 111. On the one hand, such a design further increases the area of ​​the air outlet 121 of the gas channel constructed by the valve mouth part 23, which is conducive to the entry of gas, thereby increasing the compression efficiency and reducing the compression energy consumption; on the other hand, the stronger airflow during air intake can blow off the grease accumulated on the upper surface of the valve mouth part 23, and the setting of the valve mouth part 23 with a higher left and a lower right is more conducive to the discharge of grease, reducing the influence of grease accumulation on the sealing of the air intake valve. The slope of the slope should be selected according to the actual situation. If the slope is too small, the air intake and oil discharge functions are limited; if the slope is too large, the volume of the valve plate 2 will increase, which is not conducive to the tightness of the space of the valve body 1.

[0051] Working principle: Using the lever principle, the valve plate 2 has two lever states:

[0052] 1. Reference Figure 6 When the valve plate 2 is closed, the fulcrum of the lever is on the right fulcrum module 6. At this time, the pressure difference between the external gas and the internal gas of the intake valve is in a laborious state, while the upward elastic force of the spring is in a labor-saving state, thereby making the valve plate 2 fit the valve body 1 more closely, forming a long-term and good seal.

[0053] 2. Reference Figure 8 After the pressure difference reaches the set value, the valve plate 2 opens toward the inside of the valve body 1. At this time, the fulcrum of the lever is transferred from the right fulcrum module 6 to the left fulcrum module 5. The pressure difference is in a labor-saving state, while the elastic force of the spring is in a labor-intensive state, so that the downward drop of the valve mouth 23 is larger, making it easier for external gas to be discharged into the intake valve, thereby reducing the power consumption of the compressor suction.

[0054] Reference Figure 7 , using the principle that the flow intensity of the exhaust gas gradually weakens, the pneumatic component 56 is controlled to make the fulcrum of the lever return from the left fulcrum module 5 to the right fulcrum module 6 again.

[0055] Specifically, when the fulcrum of the lever of the valve plate 2 is on the right fulcrum module 6, the right end 24 should remain stable, that is, the right end 24 is blocked from moving downward, so that after the pressure difference reaches the set value, the left end 21 completes the downward movement first; and when the fulcrum returns to the right fulcrum module 6 again, the upward movement of the right end 24 should be smooth to quickly complete the transfer process of the fulcrum. Therefore, the lower part of the first side edge 241 is set as a plane, and the first convex body 621 has a first inclined surface 6211 and a second inclined surface 6212. When the right end 24 moves downward, the lower plane of the first side edge 241 contacts and pushes the first inclined surface 6211 with a gentler slope in the front-to-back direction, and is subject to greater resistance; when the right end 24 moves upward, the arc surface of the first side edge 241 contacts and pushes the second inclined surface 6212 with a steeper slope in the front-to-back direction, and the resistance is weak and negligible.

[0056] Similarly, the left end 21 should be smooth when going down and blocked when going up. In particular, the blocked here means that when the pneumatic assembly 56 does not reach the set posture, the left end 21 cannot go up, that is, it is in a blocked state. Therefore, the upper part of the second side edge 21311 is set as a plane, and the second convex body 521 has a third inclined surface 5211.

[0057] During the working process, the posture of the valve disc 2 will be tilted. To prevent the valve disc 2 from falling off, the left end 21 and the right end 24 should be pressed against the left groove 511 and the right groove 611 when moving in the left groove 511 and the right groove 611. Therefore, the left end 21 includes an end 211, a third spring 212, and an extension 213. The elastic deformation of the third spring 212 makes the distance between the end 211 and the extension 213 a floating value, thereby making the length of the valve disc 2 when deflected able to be compensated. In addition, a clamping edge 6111 is provided on the right groove 611. The clamping edge 6111 cooperates with the second protrusion 521 on the left clamp 52 in the clamping groove 5111 and the lower edge 5112 on the left groove 511 to construct the limit downward position of the valve disc 2.

[0058] The principle of the pneumatic assembly 56 releasing the sealed state of the left end 21 is as follows: when air is inhaled, the impeller 562 and the stationary impeller 563 will rotate in the counterclockwise direction under the influence of the gas flow in the valve body 1, driving the main shaft 561 and the cam 565 fixed to the main shaft 561 to rotate. The cam 565 has an inclined surface facing the bearing 564. When the cam 565 rotates to the set angle, its own inclined surface will gradually move away from the protruding column 522 on the left clamp 52, and will not affect the protruding column 522. When the airflow weakens, that is, the air intake process is about to end, the cam 565 will rotate clockwise and return to its original position under the drive of the eccentric impeller 5631, and push the protruding column 522 toward the bearing 564 for a certain distance, thereby causing a certain deviation between the second protruding body 521 on the left clamp 52 and the second side edge 21311, so that the sealed state of the left end 21 is released, and the left end 21 can move upward under the elastic force of the first spring 3. The above-mentioned setting angle and original position are respectively obtained by arranging the upper boss 512 and the lower boss 513 on the left main body 51 .

[0059] 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 variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An intake valve assembly for a gas compressor, comprising a valve body (1), a valve plate (2), a first spring (3), and a lift limiter (4), characterized in that: It also comprises a left fulcrum module (5) and a right fulcrum module (6), the valve body (1) comprising an upper valve body (11) and a lower valve body (12), the valve plate (2) comprising, from left to right, a left end (21), a spring portion (22), a valve mouth portion (23), and a right end (24), the left end (21) and the right end (24) being respectively placed in the left fulcrum module (5) and the right fulcrum module (6), the spring portion (22) being above the first spring (3); The right end (24) is clamped by the right fulcrum module (6) and hinged to the right fulcrum module (6) when the valve plate (2) is closed; the valve mouth portion (23) is opened toward the inside of the valve body (1) after receiving a set pressure difference, and the left end (21) and the right end (24) respectively move downward along the left fulcrum module (5) and the right fulcrum module (6); when the gas flow rate of the valve mouth portion (23) reaches a set value, the left end (21) is hinged to the left fulcrum module (5); and when the gas flow rate of the valve mouth portion (23) is less than the set value, the first spring (3) pushes the spring portion (22) upward and restores the hinge connection between the right end (24) and the right fulcrum module (6); The right fulcrum module (6) comprises a right main body (61), a right clamp (62), a second spring (63), a right baffle (64), and a right fixing block (65); the right main body (61) is connected to the right inner wall of the lower valve body (12); a right groove (611) is provided on the right main body (61); the right groove (611) wraps around the right end (24); the two right clamps (62) are symmetrically inserted into the front and rear sides of the right main body (61); the two second springs (63) are respectively connected to the other ends of the opposite ends of the two right clamps (62); the two right baffles (64) are symmetrically connected to the front of the right main body (61); , rear surface, the right fixing block (65) is attached to a side of the right baffle (64) away from the right main body (61), the front and rear sides of the right end (24) are symmetrically provided with first side edges (241), the first side edges (241) are provided as a semi-cylindrical structure, and the lower part of the first side edges (241) is provided as a plane, the first convex body (621) is provided on the opposite side of the two right clamping members (62), the first convex body (621) includes a first inclined surface (6211) and a second inclined surface (6212) from top to bottom, and the angle between the first inclined surface (6211) and the vertical surface is greater than that between the second inclined surface (6212); The right clamp (62) further comprises a right support rod (622), the right support rod (622) being inserted into the second spring (63) and passing through the right blocking plate (64) and the right fixing block (65), and a thread is arranged at one end of the right support rod (622) away from the first side edge (241).

2. The air intake valve assembly of a gas compressor according to claim 1, characterized in that: The left end (21) comprises an end portion (211), a third spring (212), and an extension portion (213); the end portion (211) is on the left side of the spring portion (22); the third spring (212) is inserted into the end portion (211); the extension portion (213) comprises a shell (2131) and an extension rod (2132); the shell (2131) is sleeved on the end portion (211); and the extension rod (2132) is connected to the inside of the shell (2131).

3. The air intake valve assembly of a gas compressor according to claim 2, characterized in that: The front and rear sides of the shell (2131) are symmetrically provided with second side edges (21311), and the upper side of the second side edge (21311) is set as a plane. The left fulcrum module (5) comprises a left main body (51), a left clamping member (52), a fourth spring (53), a left baffle (54), a left fixing block (55), and a pneumatic component (56). The left main body (51) is connected to the left inner wall of the lower valve body (12), and a left groove (511) is formed on the left main body (51). The left groove (511) wraps around the shell (2131). The two left clamping members (52 ) are symmetrically inserted into the front and rear sides of the left main body (51), the two fourth springs (53) are respectively connected to the other ends of the opposite ends of the two left clamps (52), the two left baffles (54) are symmetrically connected to the front and rear surfaces of the left main body (51), the left fixing block (55) is attached to the side of the left baffle (54) away from the left main body (51), the pneumatic assembly (56) is installed above the left main body (51), and a second convex body (521) is provided on the opposite side of the two left clamps (52), and a third inclined surface (5211) is provided on the second convex body (521).

4. The air intake valve assembly of a gas compressor according to claim 3, characterized in that: The pneumatic assembly (56) comprises a main shaft (561), a movable impeller (562), a stationary impeller (563), a bearing (564), and a cam (565). The two main shafts (561) are respectively inserted into the front and rear sides of the left main body (51). The movable impeller (562) is sleeved on the protruding end of the main shaft (561). The stationary impeller (563), the bearing (564), and the cam (565) are sequentially connected to the main shaft (561) in a direction from the protruding end to the protruding end of the main shaft (561).

5. The air intake valve assembly of a gas compressor according to claim 4, characterized in that: The end surface of the cam (565) close to the end where the main shaft (561) extends into is a plane, and the other end surface of the cam (565) is an inclined surface. A boss (522) is arranged above the left clamp (52), and the boss (522) is between the bearing (564) and the cam (565). An upper boss (512) and a lower boss (513) are symmetrically arranged on the front and rear end surfaces of the left main body (51). The upper boss (512) and the lower boss (513) are arranged above and to the right of the main shaft (561), respectively. The stationary impeller (563) includes an eccentric impeller (5631), and the eccentric impeller (5631) is located between the upper boss (512) and the lower boss (513).

6. The air intake valve assembly of a gas compressor according to claim 3, characterized in that: The left groove (511) and the right groove (611) are parallel to each other. A clamping groove (5111) is provided on the left groove (511), and the clamping groove (5111) wraps around the left clamping member (52). A clamping edge (6111) is provided below the right groove (611), and the clamping groove (5111) is parallel to the clamping edge (6111).

7. An intake valve assembly for a gas compressor according to claim 6, characterized in that: The left groove (511) and the right groove (611) are configured as rectangular grooves, the right side surface (242) of the right end (24) and the left side surface (21312) of the shell (2131) are both configured as arc surfaces, the left groove (511) and the right groove (611) respectively have a protruding lower edge (5112) and an upper edge (6112), and the lower edge (5112) and the upper edge (6112) are both rounded.

8. The air intake valve assembly of a gas compressor according to claim 1, characterized in that: An air inlet (111) and an air outlet (121) are respectively provided on the upper valve body (11) and the lower valve body (12); the air inlet (111) and the air outlet (121) are respectively located above and below the valve opening portion (23); the lower end surface of the air inlet (111) is arranged as an inclined surface which is lower on the left and higher on the right, and the upper end surface of the valve opening portion (23) is arranged as an inclined surface which is higher on the left and lower on the right.

Images