CN220870154U

CN220870154U - Axial flow type check valve

Info

Publication number: CN220870154U
Application number: CN202322776054.4U
Authority: CN
Inventors: 吴大海; 陈必龙; 贾从庆
Original assignee: Zhejiang Mingsheng Valve Co ltd
Current assignee: Zhejiang Mingsheng Valve Co ltd
Priority date: 2023-10-13
Filing date: 2023-10-13
Publication date: 2024-04-30
Anticipated expiration: 2033-10-13

Abstract

The utility model discloses an axial flow type check valve, which comprises a valve body, wherein the valve body comprises a valve seat arranged at an inlet end, a valve clack in sealing fit with the valve seat, a valve rod connected to the valve clack and a guide cover integrally formed with the valve body, a second sleeve is arranged in the guide cover, and one end of the valve rod is in sliding fit with the second sleeve; the elastic component, the elastic component is including the cover establish the spring on the valve rod, install the second stopper on the second axle sleeve and set up the first stopper on the valve rod, be provided with the sliding sleeve on the second stopper, install the ball on the sliding sleeve, install the location spring pin on the first stopper, and location spring pin tip is provided with the steel ball, steel ball and ball contact and sliding fit. The utility model can prevent the pressure difference change caused by medium flow, so that the valve rod can frequently slide and vibrate, the service life of the valve is prolonged, and the noise generated by the valve is reduced.

Description

Axial flow type check valve

Technical Field

The utility model relates to a check valve, in particular to an axial flow type check valve.

Background

The axial flow check valve has the function of preventing the medium from flowing reversely, and the structure of the valve mainly comprises a valve body, a valve cover, a valve clack, a spring and the like, when the flow direction of the medium is opposite to the flow direction set by the valve, the valve clack can be impacted by the medium flow and is closed rapidly, so that the one-way flow of the system is maintained, the condition of the medium flowing reversely is avoided, but when the valve clack is in an open state, the valve clack is always in dynamic force balance due to the continuous change of the pressure difference generated by the medium flow, and the valve rod is caused to slide and vibrate frequently, so that abrasion and noise can be caused, and the service life of the valve can be influenced by the vibration and the noise.

Disclosure of utility model

The utility model aims to overcome the defects and shortcomings of the prior art and provides an axial flow check valve.

The technical scheme adopted by the utility model is as follows: the axial flow type check valve comprises a valve body, wherein the valve body comprises a valve seat arranged at an inlet end, a valve clack in sealing fit with the valve seat, a valve rod connected to the valve clack and a guide cover integrally formed with the valve body, a second sleeve is arranged in the guide cover, and one end of the valve rod is in sliding fit with the second sleeve; the elastic component, the elastic component is including the cover establish the spring on the valve rod, install the second stopper on the second axle sleeve and set up the first stopper on the valve rod, be provided with the sliding sleeve on the second stopper, install the ball on the sliding sleeve, install the location spring pin on the first stopper, and location spring pin tip is provided with the steel ball, steel ball and ball contact and sliding fit.

Through adopting above-mentioned technical scheme, the cooperation between steel ball and the ball has regulatory function, but the valve aperture is adjusted, and the valve rod can not receive pressure differential and frequently slide when the medium flows to the up-and-down motion of valve clack can be restricted to the location spring pin, noise reduction and wearing and tearing, and increase of service life.

The utility model further provides that the sliding sleeves are arranged at intervals along the length direction of the second limiting block, rolling grooves are formed in the sliding sleeves, solid lubricating grease is arranged at the bottoms of the sliding sleeves, and the balls are arranged on the rolling grooves and are in contact with the solid lubricating grease.

Through adopting above-mentioned technical scheme, be provided with solid grease's sliding sleeve and can let the ball have self-lubricating function, do not need frequent maintenance to extension valve's life, owing to the design of rolling groove and ball, can disperse the pressure on the valve rod, reduce the direct friction between valve rod and the second collar, thereby improved the wear resistance of valve.

The solid grease of the present utility model is further provided in an annular shape.

The utility model further provides that the positioning spring pins are arranged at intervals along the length direction of the first limiting block, and the steel balls can axially stretch along the positioning spring pins and can freely rotate in the positioning spring pins.

Through adopting above-mentioned technical scheme, through the length of locating spring pin and the position of steel ball, can adjust and restrict the aperture of valve, reach more accurate valve control effect.

The utility model is further characterized in that the valve clack is provided with a fixed convex column in stop fit with the first shaft sleeve, the inlet end is provided with the first shaft sleeve, and the first shaft sleeve comprises a buffer cushion and an anti-slip ring which are mutually matched with the fixed convex column.

Through adopting above-mentioned technical scheme, the cooperation of fixed projection and first axle sleeve can reduce vibration from top to bottom when the valve clack is sealed, makes the valve more stable, and impact and the vibration of blotter and antiskid circle in-process can reduce the valve and close to reduce the wearing and tearing between valve clack and the disk seat, improved the wear resistance of valve.

The utility model is further characterized in that the valve seat is provided with a soft sealing block in sealing fit with the valve clack.

By adopting the technical scheme, the valve clack and the valve seat are sealed, and vibration between the valve clack and the valve seat is further reduced.

The utility model further provides that the valve clack is provided with a limit column in limit fit with the spring.

Through adopting above-mentioned technical scheme, the setting of spacing post can guarantee that the spring is spacing to be in suitable operating condition, avoids the spring to influence the operating performance of valve because of excessive compression or lax.

The utility model is further characterized in that the air guide sleeve is provided with an adjusting hole.

The beneficial effects of the utility model are as follows: the axial flow check valve provided by the utility model can prevent the pressure difference change caused by medium flow, so that the valve rod frequently slides and vibrates, the service life of the valve is prolonged, and the noise generated by the valve is reduced.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that it is within the scope of the utility model to one skilled in the art to obtain other drawings from these drawings without inventive faculty.

FIG. 1 is a cross-sectional view of the overall structure of the present utility model;

FIG. 2 is a cross-sectional view of the valve flap of the present utility model;

FIG. 3 is an enlarged schematic view of the portion A in FIG. 1;

fig. 4 is an enlarged schematic view of the B part in fig. 1.

In the figure, 1, a valve body; 2. an inlet end; 3. a valve seat; 31. a soft sealing block; 32. a first sleeve; 321. a cushion pad; 322. an anti-slip ring; 4. a valve flap; 41. fixing the convex column; 42. a valve stem; 421. a first limiting block; 4211. a limit spring pin; 4212. steel balls; 43. a limit column; 44. a spring; 5. a guide cover; 51. an adjustment aperture; 6. a second sleeve; 61. a second limiting block; 62. a sliding sleeve; 621. a rolling groove; 63. solid grease; 64. and (3) rolling balls.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present utility model more apparent.

It should be noted that, in the embodiments of the present utility model, all the expressions "first" and "second" are used to distinguish two entities with the same name but different entities or different parameters, and it is noted that the "first" and "second" are only used for convenience of expression, and should not be construed as limiting the embodiments of the present utility model, and the following embodiments are not described one by one.

The terms of direction and position in the present utility model, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer only to the direction or position of the drawing. Accordingly, directional and positional terms are used to illustrate and understand the utility model and are not intended to limit the scope of the utility model.

As shown in fig. 1 to 4, an axial flow check valve according to an embodiment of the present utility model comprises a valve body 1, wherein the valve body 1 comprises a valve seat 3 arranged at an inlet end 2, a valve clack 4 in sealing fit with the valve seat 3, a valve rod 42 connected to the valve clack 4, and a guide cover 5 integrally formed with the valve body 1, a second shaft sleeve 6 is arranged in the guide cover 5, and one end of the valve rod 42 is in sliding fit with the second shaft sleeve 6; the elastic component comprises a spring 44 sleeved on the valve rod 42, a second limiting block 61 installed on the second shaft sleeve 6 and a first limiting block 421 arranged on the valve rod 42, a sliding sleeve 62 is arranged on the second limiting block 61, a ball 64 is installed on the sliding sleeve 62, a positioning spring pin 4211 is installed on the first limiting block 421, a steel ball 4212 is arranged at the end part of the positioning spring pin 4211, and the steel ball 4212 is in contact with the ball 64 and in sliding fit. The cooperation among the positioning spring pin 4211, the steel balls 4212 and the balls 64 has the adjusting and limiting functions, the positioning spring pin 4211 is pushed to displace through larger medium pressure difference, the opening degree of the valve and the position of the positioning spring pin 4211 cannot be changed along with small change of the pressure difference, the steel balls 4212 and the balls 64 of the positioning spring pin 4211 slide to adjust the opening degree of the valve, the valve rod 42 cannot frequently slide due to the pressure difference when the medium flows, and the positioning spring pin 4211 can limit the up-and-down movement of the valve clack 4, so that noise and abrasion are reduced, and the service life is prolonged.

As shown in fig. 1 to 4, a rolling groove 621 is provided in the sliding sleeve 62, a solid grease 63 is provided at the bottom of the sliding sleeve 62, and balls 64 are mounted on the rolling groove 621 and contact the solid grease 63. The sliding sleeve 62 provided with the solid lubricating grease 63 can enable the balls 64 to have a self-lubricating function, frequent maintenance is not needed, and therefore the service life of the valve is prolonged, and due to the design of the rolling groove 621 and the balls 64, the pressure on the valve rod 42 can be dispersed, and direct friction between the valve rod 42 and the second sleeve 6 is reduced, so that the wear resistance of the valve is improved.

As shown in fig. 3, the solid grease 63 has a ring shape.

As shown in fig. 3, the positioning spring pins 4211 are disposed at intervals along the length direction of the first limiting block 421, and the steel balls 4212 can axially expand and contract along the positioning spring pins 44 and can freely rotate in the positioning spring pins 4211. The opening degree of the valve can be regulated and limited by positioning the length of the spring pin 4211 and the position of the steel ball 4212, so that a more accurate valve control effect is achieved.

As shown in fig. 1 and 4, the valve clack 4 is provided with a fixing boss 41 in stop fit with the first shaft sleeve 32, the inlet end 2 is provided with the first shaft sleeve 32, and the first shaft sleeve 32 comprises a buffer pad 321 and an anti-slip ring 322 which are mutually matched with the fixing boss 41. The cooperation of fixed projection 41 and first axle sleeve 32 can reduce the vibration from top to bottom when valve clack 4 seals, makes the valve more stable, and blotter 321 and antiskid circle 322 can reduce the impact and the vibration of valve in-process of closing to reduce the wearing and tearing between valve clack 4 and the disk seat 3, improved the wear resistance of valve.

As shown in fig. 1, the valve seat 3 is provided with a soft sealing block 31 in sealing engagement with the valve flap 4. The valve flap 4 and the valve seat 3 are sealed, and vibration between the valve flap 4 and the valve seat 3 is further reduced.

As shown in fig. 1 and 2, the valve clack 4 is provided with a limit post 43 in limit fit with a spring 44. The limiting post 43 can ensure that the spring 44 is limited in a proper working state, and the operation performance of the valve is prevented from being influenced by excessive compression or relaxation of the spring 44.

As shown in fig. 1, the air guide sleeve 5 is provided with an adjusting hole 51, and the adjusting hole 51 prevents the valve clack 4 and the air guide sleeve 5 from being sucked by pressure difference.

The foregoing disclosure is illustrative of the present utility model and is not to be construed as limiting the scope of the utility model, which is defined by the appended claims.

Claims

1. An axial flow check valve, comprising:

The valve comprises a valve body (1), wherein the valve body (1) comprises a valve seat (3) arranged at an inlet end (2), a valve clack (4) in sealing fit with the valve seat (3), a valve rod (42) connected to the valve clack (4) and a guide cover (5) integrally formed with the valve body (1), a second shaft sleeve (6) is arranged in the guide cover (5), and one end of the valve rod (42) is in sliding fit with the second shaft sleeve (6);

The elastic component, elastic component is including cover establish spring (44) on valve rod (42), install second stopper (61) on second collar (6) and set up first stopper (421) on valve rod (42), be provided with sliding sleeve (62) on second stopper (61), install ball (64) on sliding sleeve (62), install location spring pin (4211) on first stopper (421), and location spring pin (4211) tip is provided with steel ball (4212), steel ball (4212) and ball (64) contact and sliding fit.

2. The axial flow check valve according to claim 1, wherein the sliding sleeve (62) is arranged at intervals along the length direction of the second limiting block (61) and is internally provided with a rolling groove (621), the bottom of the sliding sleeve (62) is provided with solid lubricating grease (63), and the balls (64) are mounted on the rolling groove (621) and are in contact with the solid lubricating grease (63).

3. The axial flow check valve of claim 2, wherein the solid grease (63) is annular in shape.

4. The axial flow check valve according to claim 2, wherein the positioning spring pins (4211) are arranged at intervals along the length direction of the first limiting block (421), and the steel balls (4212) can axially stretch along the positioning spring pins (4211) and can freely rotate in the positioning spring pins (4211).

5. The axial flow check valve according to claim 1, characterized in that the valve flap (4) is provided with a fixing boss (41) in blocking engagement with the first shaft sleeve (32), the inlet end (2) is provided with the first shaft sleeve (32), and the first shaft sleeve (32) comprises a buffer pad (321) and a non-slip ring (322) which are engaged with the fixing boss (41).

6. An axial flow check valve according to claim 1 or 5, characterised in that the valve seat (3) is provided with a soft sealing block (31) in sealing engagement with the valve flap (4).

7. The axial flow check valve according to claim 1, characterized in that the valve flap (4) is provided with a limit post (43) in limit fit with a spring (44).

8. The axial flow check valve according to claim 1, characterized in that the guide sleeve (5) is provided with an adjusting hole (51).