CN217762220U - Check valve - Google Patents

Abstract

The utility model provides a check valve, relate to the technical field of valve design, at the valve body, valve clack mechanism, set up buffer gear on the basis of disk seat, valve clack mechanism includes the valve rod and the valve clack body of being connected with the valve rod, be equipped with the elasticity portion in the buffer gear, move to the in-process of disk seat at the valve clack body, the one end compression elasticity portion of valve rod, can be when valve clack body and disk seat are closed, reduce the impact force that sealed face produced between valve clack body and disk seat, reduce the probability that sealed face warp between valve clack and disk seat, and avoid the noise, and can guarantee that the valve clack in time opens.

Description

Check valve

Technical Field

The utility model relates to a technical field of valve design, more specifically relates to a check valve.

Background

The pipeline in various industrial or civil fields in modern society has the application of valve, and the valve can control and adjust the flow of medium in the pipeline with the pipeline cooperation, and the check valve is the valve that can make medium unidirectional flow and can prevent the medium refluence.

The traditional check valve comprises a valve clack and a valve seat, wherein the medium on two sides of the valve clack has pressure difference, when the medium pressure on one side of the valve clack close to the valve seat is greater than the medium pressure on the other side of the valve clack, the valve clack is opened relative to the valve seat, a gap is generated between the valve clack and the valve seat, the medium flows from one side of the valve clack close to the valve seat to the other side of the valve clack in a one-way mode through the gap, when the medium pressure on the other side of the valve clack is greater than the medium pressure on one side of the valve seat, the valve clack is closed with the valve seat through self gravity and medium pressure, the gap is eliminated, thereby preventing the medium from flowing backwards, when the valve clack and the valve body need to be closed under specific conditions, if the pressure difference of the medium on two sides of the valve clack is small, the thrust applied to the valve seat is small when the valve clack and the valve body are closed under specific conditions, the valve clack and the valve seat is easy to leak under the thrust of the condition of the medium flowing backwards, the sealing surface of the valve seat and the valve seat is also can be increased under the condition that the medium flows backwards, the medium between the sealing surface of the valve seat, thereby the sealing surface is increased, when still receiving spring structure's thrust, the valve clack can't in time be opened, and in addition, the impact force increase still can cause the not hard up between the pipe connection, and the noise that the vibration produced when serious still can influence peripheral personnel work.

SUMMERY OF THE UTILITY MODEL

When taking place the refluence for solving current check valve at the medium, the impact force that sealed face produced between valve clack and disk seat is great, makes sealed face warp between valve clack and disk seat easily, and strikes the problem that noise is big, still for solving under the condition of check valve horizontal installation, when pipeline discharge is lower, the problem that the valve clack can't in time be opened, the utility model provides a check valve can reduce the impact force that sealed face produced between valve clack and disk seat when valve clack and disk seat are closed, reduces the probability that sealed face warp between valve clack and disk seat, avoids the noise moreover, and can guarantee that the valve clack in time opens.

In order to achieve the above technical effects, the technical scheme of the utility model as follows:

a check valve, comprising: the valve comprises a valve rod and a valve clack body, wherein the valve rod is arranged along the axial direction of the valve body, the valve clack body is connected with the valve rod, the valve rod moves in the shaft sleeve seat and drives the valve clack body to axially move, so that a seal or a gap for medium to flow is formed between the valve clack body and one end of the valve seat, an elastic part is arranged in the buffer mechanism, and in the process that the valve clack body moves towards the valve seat, one end of the valve rod compresses the elastic part.

In the technical scheme, consider that the impact force that the sealed face produced between the valve clack body and the disk seat of current check valve is great, make the sealed face between valve clack body and the disk seat warp easily, and the problem that the impact noise is big, still under the condition of check valve horizontal installation, when pipeline discharge is lower, the problem that the valve clack body can't open in time, improve the check valve, add buffer gear in disk seat department, the interior elasticity portion that establishes of buffer gear, when taking place the medium refluence, the valve clack body moves to the disk seat, the one end of the valve rod that is connected with the valve clack body compresses the elasticity portion, under the elasticity cushioning effect of elasticity portion, the impact force that the valve clack body produces at the sealed face in the twinkling of an eye with the disk seat reduces, can reduce the probability that the sealed face between valve clack body and the disk seat warp, and avoid the noise, when the medium flows into from the entrance point of check valve and the medium pressure is not enough to make valve clack body and disk seat's one end form the clearance that supplies the medium to flow into, the elasticity of elasticity portion can promote the valve clack body to open, make the valve clack body and disk seat form the clearance that supplies the medium to flow into, guarantee that the valve clack body in time opens so that the medium flows into.

Preferably, the disk seat passes through the screw thread and is connected with the valve body, increases the stability that disk seat and valve body are connected when guaranteeing that disk seat and valve body are convenient to be dismantled.

Preferably, the one end of disk seat is equipped with sealed boss, and the valve clack body moves towards the disk seat, and the sealed boss of extrusion forms sealedly, can reduce the area of disk seat and the sealed face contact of valve clack body to reduce the required pressure of check valve seal, make sealed effect better.

Preferably, a connecting column is arranged in the through channel, two ends of the connecting column are fixedly connected with the inner surface of the valve seat, and the buffer mechanism is fixed on the connecting column, so that the connection stability of the buffer mechanism and the valve seat is higher.

Preferably, buffer gear includes one end open-ended buffing pad, the buffing pad open end is relative with the one end position of valve rod, the elastic component axial sets up in the buffing pad, one end is towards the buffing pad open end, buffer gear is still including spacing portion and the dog that is used for preventing the elastic component from popping out from the buffing pad, the surface of the one end fixed connection spliced pole of buffing pad, spacing portion sets up in the open end of buffing pad, the dog is located the lower part of spacing portion, dog fixed connection elastic component is towards the one end of buffing pad open end, the dog is under the restriction of spacing portion, the axial activity is in the buffing pad.

Here, elasticity portion axial sets up in the buffer seat, can make elasticity produce in the axial, and elasticity is higher to the push efficiency of valve rod, sets up spacing portion and dog in the buffer gear, promotes the stability that elasticity produced when guaranteeing that the elasticity distribution that the valve rod received is even.

Preferably, the valve clack mechanism further comprises a spring, the spring is sleeved on the outer surface of the valve rod, one end of the spring is connected with the shaft sleeve seat, and the other end of the spring is connected with the valve clack body.

Here, when valve clack body and disk seat need be closed in order to prevent the medium refluence under specific conditions, the valve clack body can also receive the thrust of spring when receiving medium thrust to increase the total thrust that receives when valve clack body and disk seat are closed, increase valve clack body and disk seat closure compactness, reduce the clearance that exists between valve clack body and disk seat, thereby avoid the refluence of medium.

Preferably, the valve clack mechanism still includes the sealing washer, and the sealing washer is located in the clearance that valve rod and valve clack body junction formed, prevents that the medium from leaking in clearance department, reinforcing leakproofness.

Preferably, the valve rod is connected with the valve clack body through threads, the valve clack mechanism further comprises a nut for preventing the valve clack body and the valve rod from being connected and loosened, one end of the valve rod extends out of the valve clack body, and the nut is connected with one end of the valve rod extending out of the valve clack body through threads.

Here, on the basis of valve rod and valve clack body threaded connection, add the nut at the valve rod, make nut locking valve rod and valve clack body, prevent that valve clack body and valve rod are connected not hard up.

Preferably, the valve body further comprises a flow guide cover, the flow guide cover is axially arranged in the cavity along the valve body, the shaft sleeve seat is fixedly connected with the inner surface of the flow guide cover, the flow guide cover is in a streamline shape, and the outer surface of the flow guide cover is fixedly connected with the inner surface of the valve body.

The flow guide cover can enhance the fluidity of the medium in the valve body, ensure the overflowing capacity of the check valve and reduce the pressure loss when the medium flows.

Preferably, the air guide sleeve and the valve body are integrally formed, so that the combination stability of the air guide sleeve and the valve body is enhanced, and the position of the air guide sleeve is not easy to deviate.

Compared with the prior art, the utility model discloses technical scheme's beneficial effect is:

the utility model provides a check valve, consider that current check valve takes place when flowing backwards at the medium, the impact force that sealed face produced between valve clack body and disk seat is great, make sealed face deformation between valve clack body and disk seat easily, and strike the problem that noise is big, still for solving under the condition of check valve horizontal installation, when pipeline discharge is lower, the problem that the valve clack body can't in time be opened, improve the check valve, add buffer gear in disk seat department, establish the elasticity portion in the buffer gear, when taking place the medium refluence, the valve clack body moves towards the disk seat, the one end compression elasticity portion of the valve rod of being connected with the valve clack, under the elasticity cushioning effect of elasticity portion, the impact force that valve clack body and disk seat closure produced in the twinkling of an eye at sealed face reduces, can reduce the probability that sealed face warp between valve clack body and disk seat, and avoid the noise, when the medium from the entrance point inflow of check valve and the medium pressure of medium is not enough to make valve clack body and disk seat's one end form the clearance that supplies the medium inflow, the elasticity of elasticity portion can promote the spring body to open, make the valve clack body open, the one end of valve clack body and supply the clearance of medium inflow, guarantee that the medium inflow in time to flow.

Drawings

Fig. 1 shows a cross-sectional view of a check valve according to an embodiment of the present invention when the check valve is open;

fig. 2 is an enlarged schematic structural view of a buffer mechanism proposed in an embodiment of the present invention;

fig. 3 shows a cross-sectional view of the check valve as proposed in an embodiment of the invention when closed;

fig. 4 is an enlarged schematic structural view of a valve flap mechanism according to an embodiment of the present invention.

Wherein, 1, the valve body; 2. a valve flap mechanism; 21. a valve stem; 22. a valve flap body; 23. a spring; 24. a seal ring; 25. a nut; 3. a valve seat; 31. a through passage; 32. connecting columns; 4. a buffer mechanism; 41. an elastic portion; 42. a buffer seat; 43. a limiting part; 44. a stopper; 5. a cavity; 6. a shaft sleeve seat; 7. and sealing the boss.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent;

for better illustration of the embodiment, some parts in the drawings may be omitted, enlarged or reduced, and do not represent actual dimensions, and the description of directions of the parts such as "up" and "down" is not limited to the patent;

it will be understood by those skilled in the art that certain well-known descriptions of the figures may be omitted.

The technical solution of the present invention is further described with reference to the accompanying drawings and embodiments.

Example 1

The check valve shown in fig. 1 includes: the valve comprises a valve body 1, a valve clack mechanism 2 and a valve seat 3, wherein the valve seat 3 is positioned at the end part of the valve body 1 and is connected with the valve body 1, an axial through channel 31 is arranged in the valve seat 3, one end of the through channel 31 is a medium flow inlet end, referring to figure 2, the valve also comprises a buffer mechanism 4, the buffer mechanism 4 is arranged at the medium flow inlet end, fixedly connected with a valve seat 3, a cavity 5 is arranged inside the valve body 1, a valve clack mechanism 2 is arranged in the cavity 5, a shaft sleeve seat 6 is also arranged in the cavity 5, the shaft sleeve seat 6 is fixedly connected with the valve body 1, referring to fig. 3 and fig. 4, the valve clack mechanism 2 comprises a valve rod 21 arranged along the axial direction of the valve body 1 and a valve clack body 22 connected with the valve rod 21, the valve rod 21 is movably arranged in a shaft sleeve of the shaft sleeve seat 6, and drives the flap body 22 to move axially, so that the flap body 22 forms a seal or a gap for medium to flow into with one end of the valve seat 3, an elastic part 41 is arranged in the buffer mechanism 4, see fig. 3, during the movement of the flapper body 22 toward the valve seat 3, one end of the valve stem 21 compresses the elastic portion 41, in actual practice, when a reverse flow of the medium occurs, the flapper body 22 moves toward the valve seat 3, one end of the stem 21 connected to the flapper body 22 compresses the elastic part 41, under the elastic force buffering action of the elastic part 41, the impact force generated on the sealing surface at the moment when the valve clack body 22 and the valve seat 3 are closed is reduced, the probability of deformation of the sealing surface between the valve clack body 22 and the valve seat 3 can be reduced, and to avoid noise, when the medium flows in from the medium flow inlet end of the check valve and the pressure of the medium is not enough to form a gap for the medium to flow in between the flap body 22 and one end of the valve seat 3, the elastic force of the elastic part 41 can push the valve clack body 22 to open, so that a gap for medium to flow into is formed between the valve clack body 22 and one end of the valve seat 3, and the valve clack body 22 is ensured to be opened timely to enable the medium to flow normally.

Optionally, the elastic portion 41 is a spring, and in practical applications, the elastic portion 41 may also be other elastic materials such as elastic rubber, and is not limited herein.

As a preferred embodiment, disk seat 3 passes through the screw thread to be connected with valve body 1, and is concrete, is equipped with the external screw thread on disk seat 3's the lateral surface, is equipped with the internal thread on the valve body 1, increases the stability that disk seat 3 and valve body 1 are connected when guaranteeing that disk seat 3 and valve body 1 conveniently dismantle.

As a preferred embodiment, one end of the valve seat 3 is provided with a sealing boss 7, the valve flap body 22 moves towards the valve seat 3, the sealing boss 7 is pressed to form a seal, the contact area of the sealing surface of the valve seat 3 and the valve flap body 22 can be reduced, and therefore, the pressure required by the sealing of the check valve is reduced, and the sealing effect is better, and optionally, the contact surface of the valve flap body 22 and the sealing boss 7 is a rough plane, and the sealing effect can be enhanced.

As a preferred embodiment, a connection column 32 is arranged in the through channel 31, two ends of the connection column 32 are fixedly connected to the inner surface of the valve seat 3, and the buffer mechanism 4 is fixed on the connection column 32, so that the connection stability between the buffer mechanism 4 and the valve seat 3 is higher, specifically, the connection column 32 is a beam or a bracket, in practical application, the buffer mechanism 4 can be connected with the valve seat 3 through a grid structure in addition to the connection column, and the connection mode between the buffer mechanism 4 and the valve seat 3 is not limited specifically here.

As a preferred embodiment, the buffer mechanism 4 includes a buffer seat 42 with an open end, the open end of the buffer seat 31 is opposite to one end of the valve rod 21, the elastic portion 41 is axially disposed in the buffer seat 42, and one end of the elastic portion faces the open end of the buffer seat 42, the buffer mechanism 4 further includes a limiting portion 43 and a stopper 44 for preventing the elastic portion 41 from popping out from the buffer seat 42, one end of the buffer seat 42 is fixedly connected to the surface of the connecting column 32, the limiting portion 43 is disposed in the open end of the buffer seat 42, the stopper 44 is located at the lower portion of the limiting portion 43, the stopper 44 is fixedly connected to one end of the elastic portion 41 facing the open end of the buffer seat 42, the stopper 44 is axially movable in the buffer seat 42 under the limitation of the limiting portion 43, the elastic portion 41 is axially disposed in the buffer seat 42, so as to enable the elastic force to be generated in the axial direction, the pushing efficiency of the valve rod 21 by the elastic force is higher, the limiting portions 43 and 44 are disposed in the buffer mechanism 4, so as to ensure that the uniform distribution of the elastic force received by the valve rod 21 is promoted, optionally, both the buffer seat 42 and the stopper is cylindrical body, and the diameter of the buffer seat 42 is larger than that the diameter of the valve rod 21.

Example 2

Referring to fig. 3 and 4, as a preferred embodiment, the valve flap mechanism 2 further includes a spring 23, the spring 23 is sleeved on the outer surface of the valve rod 21, one end of the spring 23 is connected to the shaft sleeve seat 6, and the other end of the spring 23 is connected to the valve flap body 22, when the spring 23 compresses and expands between the shaft sleeve seat 6 and the valve flap body 22, the spring can indirectly control the valve flap body 22 and one end of the valve seat 3 to form a seal or a gap for a medium to flow into, in practical implementation, when the valve flap body 22 and the valve seat 3 need to be closed under a specific condition to prevent the medium from flowing backwards, the valve flap body 22 can receive the thrust of the spring 23 while receiving the thrust of the medium, so as to increase the total thrust received when the valve flap body 22 and the valve seat 3 are closed, increase the tightness between the valve flap body 22 and the valve seat 3, and reduce the gap between the valve flap body 22 and the valve seat 3, thereby preventing the medium from flowing backwards.

In a preferred embodiment, the flap mechanism 2 further includes a sealing ring 24, and the sealing ring 24 is disposed in a gap formed at the connection between the valve stem 21 and the flap body 22.

Optionally, the sealing ring 24 is made of graphite, the graphite material has good sealing performance and oil-proof and corrosion-proof functions, and the service life of the valve can be prolonged.

As a preferred embodiment, the valve rod 21 is connected with the valve flap body 22 through a screw thread, the valve flap mechanism 2 further includes a nut 25 for preventing the valve flap body 22 from being connected with the valve rod 21 loosely, one end of the valve rod 21 extends from the valve flap body 22, the nut 25 is connected with one end of the valve rod 21 extending from the valve flap body 22 through a screw thread, and on the basis of the screw thread connection of the valve rod 21 and the valve flap body 22, the nut 25 is additionally arranged at the valve rod 21, so that the nut 25 locks the valve rod 21 and the valve flap body 22, and the valve flap body 22 is prevented from being connected with the valve rod 21 loosely.

Optionally, a clamping piece for clamping the valve rod 21 is arranged at one end of the nut 25, so that the valve rod 21 and the valve clack body 22 can be better prevented from being connected loosely.

Example 3

Referring to fig. 1 and 2, as a preferred embodiment, the valve body 1 further includes a dome 101, the dome 101 is axially disposed in the cavity 5 along the valve body 1, the sleeve seat 6 is fixedly connected to an inner surface of the dome 101, the dome 101 is in a streamline shape, an outer surface of the dome 101 is fixedly connected to an inner surface of the valve body 1, specifically, the dome 101 is in a circular truncated cone shape and is internally hollow, an upper bottom surface and a lower bottom surface of the dome 101 are both open, and the lower bottom surface corresponds to the valve flap body 22, the arrangement of the dome 101 can enhance the fluidity of a medium in the valve body 1, ensure the flow capacity of the check valve, and reduce the pressure loss when the medium flows.

In a preferred embodiment, the pod 101 is integrally formed with the valve body 1, so that the stability of the combination of the pod and the valve body is enhanced, and the position of the pod is not easy to shift.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A check valve, comprising: the valve body (1), the valve clack mechanism (2) and the valve seat (3), wherein the valve seat (3) is located at the end part of the valve body (1) and connected with the valve body (1), an axial through channel (31) is arranged in the valve seat (3), one end of the through channel (31) is a medium flow inlet end, the valve seat is characterized by further comprising a buffer mechanism (4), the buffer mechanism (4) is arranged at the medium flow inlet end and fixedly connected with the valve seat (3), a cavity (5) is arranged in the valve body (1), the valve clack mechanism (2) is arranged in the cavity (5), a shaft sleeve seat (6) is further arranged in the cavity (5), the shaft sleeve seat (6) is fixedly connected with the valve body (1), the valve clack mechanism (2) comprises a valve rod (21) axially arranged along the valve body (1) and a valve clack body (22) connected with the valve rod (21), the valve rod (21) moves in the shaft sleeve seat (6) and drives the valve clack body (22) to axially move, so that the valve body (22) and a gap for medium to flow is formed between the valve clack mechanism (4) and one end of the valve clack mechanism (22) and one end of the valve seat (21) in the valve body is compressed by the elastic clack mechanism, and the valve clack mechanism (41) moves towards one end of the valve rod (3).

2. Non-return valve according to claim 1, characterized in that the valve seat (3) is connected to the valve body (1) by means of a thread.

3. The non-return valve according to claim 2, characterized in that the valve seat (3) is provided at one end with a sealing boss (7), and the flap body (22) is moved towards the valve seat (3) pressing the sealing boss (7) to form a seal.

4. The non-return valve according to claim 1, characterized in that a connecting column (32) is provided in the through-passage (31), both ends of the connecting column (32) are fixedly connected to the inner surface of the valve seat (3), and the damper mechanism (4) is fixed to the connecting column (32).

5. The check valve according to claim 4, wherein the buffer mechanism (4) includes a buffer seat (42) having an open end, the open end of the buffer seat (42) is opposite to one end of the valve rod (21), the elastic portion (41) is axially disposed in the buffer seat (42), and one end of the elastic portion faces the open end of the buffer seat (42), the buffer mechanism (4) further includes a limiting portion (43) and a stopper (44) for preventing the elastic portion (41) from popping out of the buffer seat (42), one end of the buffer seat (42) is fixedly connected to the surface of the connection post (32), the limiting portion (43) is disposed at the open end of the buffer seat (42), the stopper (44) is disposed at a lower portion of the limiting portion (43), the stopper (44) is fixedly connected to one end of the elastic portion (41) facing the open end of the buffer seat (42), and the stopper (44) is axially movable in the buffer seat (42) under the limitation of the limiting portion (43).

6. The check valve according to claim 1, wherein the flap mechanism (2) further comprises a spring (23), the spring (23) is sleeved on the outer surface of the valve rod (21), one end of the spring (23) is connected with the shaft sleeve seat (6), and the other end is connected with the flap body (22).

7. The check valve according to claim 6, characterized in that the flap mechanism (2) further comprises a seal ring (24), the seal ring (24) being provided in a gap formed at a junction of the stem (21) and the flap body (22).

8. The check valve of claim 7, wherein the valve stem (21) is threadedly connected to the valve body (22), and the valve clack mechanism (2) further comprises a nut (25) for preventing the valve body (22) from being loosely connected to the valve stem (21), wherein one end of the valve stem (21) extends from the valve body (22), and the nut (25) is threadedly connected to the end of the valve stem (21) extending from the valve body (22).

9. The check valve according to claim 1, characterized in that the valve body (1) further comprises a flow guide cover (101), the flow guide cover (101) is axially arranged in the cavity (5) along the valve body (1), the shaft sleeve seat (6) is fixedly connected with the inner surface of the flow guide cover (101), the flow guide cover (101) is in a streamline shape, and the outer surface of the flow guide cover (101) is fixedly connected with the inner surface of the valve body (1).

10. Check valve according to claim 9, characterized in that the dome (101) is integrally formed with the valve body (1).

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