CN114233899B

CN114233899B - Stop check valve

Info

Publication number: CN114233899B
Application number: CN202111530042.2A
Authority: CN
Inventors: 龙成毅; 陈先兵; 曾小舸; 孟海波; 邵燕; 赵旭峰; 陈景明; 郭洪婧; 刘家鑫
Original assignee: 719th Research Institute of CSIC
Current assignee: 719th Research Institute of CSIC
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2023-03-28
Anticipated expiration: 2041-12-08
Also published as: CN114233899A

Abstract

The invention discloses a stop check valve, which relates to the technical field of fluid machinery, and comprises: a valve body including a water inlet and a valve cavity; the valve clack is arranged in the valve cavity, can move in the valve cavity to seal or open the water inlet buffer assembly, is arranged in the valve cavity, is at least partially connected with the valve clack, and is used for slowing down the moving speed of the valve clack; and the stop device is arranged on the valve cavity and can press the valve clack to seal the water inlet. According to the stop check valve in the embodiment of the invention, the buffering structure and the stop assembly are arranged at the valve clack, so that the valve clack is prevented from being violently collided due to the impact of a medium when being closed and opened, the check valve is prevented from generating noise when being used, and the service life of the check valve is prolonged. And the pipeline can be manually cut off when the pipeline is abnormal, so that the controllability is improved.

Description

Stop check valve

Technical Field

The invention relates to the technical field of fluid machinery, in particular to a stop check valve.

Background

The water pump has high utilization rate in various fields as a conventional water flow transmission device, but the water pump is generally connected with a water pipe and conveys water outwards through the water pipe when in use. However, because the inner wall of the pipe inside the water pipe is smooth, water flows freely in the pipe, and when the valve opened by the water pump is suddenly closed, the water flow generates pressure on the valve and the pipe wall. And the subsequent water flow can make the pressure at the valve reach the maximum rapidly under the action of inertia, so that the valve is damaged, namely, the water hammer effect is generated. The pump supply will typically have a check valve installed at the valve.

However, in the prior art, the check valve flap is impacted by a medium when opening and closing, so that the check valve flap collides with the limiting mechanism violently to cause large noise, and the damage to the check valve cannot be avoided so that the service life of the check valve is shortened.

Disclosure of Invention

In view of the shortcomings in the prior art, it is an object of the present invention to provide a stop check valve.

In order to achieve the purpose, the invention adopts the technical scheme that: a check valve, comprising:

a valve body including a water inlet and a valve cavity;

a valve flap disposed within the valve chamber and movable within the valve chamber to seal or open the water inlet

The buffer component is arranged in the valve cavity, at least part of the buffer component is connected with the valve clack, and the buffer component is used for slowing down the moving speed of the valve clack;

and the stop device is arranged on the valve cavity and can press the valve clack to seal the water inlet.

In some embodiments, the buffer assembly comprises:

the air guide sleeve is connected with the water inlet through a connecting rod;

the damping cylinder is arranged in the air guide sleeve in a sealing mode, a damping hole is formed in the damping cylinder, the movable end of the damping cylinder is connected with the valve clack, and the valve clack can drive the movable end of the damping cylinder to move along the X direction.

In some embodiments, the nacelle outer side structure is streamlined.

In some embodiments, the cushioning assembly further comprises:

and one end of the spring is arranged at the bottom of the air guide sleeve, and the other end of the spring is connected with the valve clack.

In some embodiments, the cut-off device comprises:

the push rod is arranged in the valve cavity, and the push rod part is arranged in the flow guide cover in a penetrating way;

the driving assembly is arranged on the valve cavity and used for controlling the push rod to horizontally move along the X direction so as to press the valve clack, and the X direction is the length direction of the push rod.

In some embodiments, the drive assembly comprises:

the manual wheel is arranged outside the valve cavity;

the connecting rod mechanism is arranged on the manual wheel and connected with the push rod, and the manual wheel can control the connecting rod mechanism to apply horizontal acting force in the X direction to the push rod through rotation.

In some embodiments, the linkage mechanism comprises:

the valve rod is connected with the manual wheel, the manual wheel can rotate to enable the valve rod to move in the valve cavity in the Y direction, and the Y direction is the length direction of the valve rod;

and the two ends of the connecting rod are respectively movably connected with the push rod and the valve rod, and the valve rod can move up and down along the Y direction to change the posture of the connecting rod.

In some embodiments, the linkage mechanism further comprises:

the valve rod limiting part is arranged on the valve cavity and provided with a limiting hole for the valve rod to pass through along the Y direction.

In some embodiments, the drive assembly further comprises:

and the push rod bracket is supported at the water outlet of the valve body, and the push rod is connected with the push rod bracket in a sliding manner.

In some embodiments, a valve sleeve is disposed at the water inlet, and the valve sleeve can cooperate with the valve flap to seal the water inlet.

Compared with the prior art, the invention has the advantages that:

(1) According to the stop check valve in the embodiment of the invention, the buffering structure is arranged at the valve clack, so that the valve clack is prevented from being violently collided due to the impact of a medium when being closed and opened, the check valve is prevented from generating noise when being used, and the service life of the check valve is prolonged.

(2) The stop check valve in the embodiment of the invention is provided with an independent stop valve, and the stop valve can close the water pump.

(3) In the embodiment of the invention, the damping cylinder and the spring are adopted as the buffering component, and the buffering action of the damping cylinder and the spring is utilized to slow down the speed of the valve clack for sealing the water inlet or opening the water inlet.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a cross-sectional view of a check valve in an embodiment of the present invention;

FIG. 2 is a side view of a check valve in an embodiment of the present invention.

In the figure: 1. a valve body; 11. a water inlet; 12. a water outlet; 13. a valve cavity; 14. a pod; 2. a valve flap; 3. a buffer assembly; 31. a damping cylinder; 32. a spring; 4. a cut-off device; 41. a push rod; 42. a drive assembly; 43. a hand-operated wheel; 44. a link mechanism; 441. a valve stem; 442. a connecting rod; 443. a valve stem stop; 45. a push rod support; 5. and (3) valve housing.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

As shown in fig. 1 and 2, the present application provides a check valve, which includes: valve body 1, valve flap 2 and cut-off device 4, wherein:

a valve body 1 comprising a water inlet 11 and a valve cavity 13; a valve flap 2, which is arranged in the valve chamber 13, is movable in the valve chamber 13 to seal or open the water inlet 11. The buffer component 3 is arranged in the valve cavity 13, at least part of the buffer component 3 is connected with the valve clack 2, and the buffer component 3 is used for slowing down the moving speed of the valve clack 2; and the stop device 4 is arranged on the valve cavity 13, and the stop device 4 can press the valve clack 2 to seal the water inlet 11.

In this application, valve clack 2 can be opened and receive when closing according to rivers about pressure difference and remove in order to seal or open water inlet 11 by oneself. However, since the valve flap 2 is connected to the movable end of the damper assembly 3, the valve flap is affected by the damper assembly 3 to slow down the movement rate thereof, regardless of the sealing action or the opening action. It should be noted that the left direction of the valve flap 2 refers to a direction close to the water inlet 11, and the right direction refers to a direction away from the water inlet 11. As shown in fig. 1, the left-right direction is the X direction in fig. 1.

Specifically, the buffer assembly 3 includes: the air guide sleeve 14 and the damping cylinder 31, the damping cylinder 31 is arranged in the air guide sleeve 14, and the air guide sleeve 14 and the damping cylinder 31 enclose a sealed buffer cavity. The movable end of the damping cylinder 31 is connected with the valve clack 2, and a damping hole is formed in the damping cylinder 31.

It is worth mentioning that a valve sleeve 5 is arranged at the water inlet 11, and the valve sleeve 5 can cooperate with the valve flap 2 to seal the water inlet 11.

Preferably, the damping assembly 3 further comprises: one end of the spring 32 is arranged at the bottom of the air guide sleeve 14, and the other end of the spring is abutted against the valve clack 2.

It will be appreciated that the damping cylinder 31 is provided in the sealed pod 14 and the enclosed medium within the cylinder can only be discharged through the small damping holes and gaps. When the water pump is opened, water flow applies right pressure to the valve clack 2, the valve clack 2 is opened rightwards, and the closed medium in the cylinder generates proper buffer pressure to act on the valve clack 2 to resist against the right inertia force borne by the valve clack 2, so that the aim of speed reduction and braking is fulfilled, the valve clack 2 cannot violently collide with the limiting surface of the air guide sleeve 5 at the completely opened tail end, and noise and impact are reduced. On the contrary, when the pump stops (or due to failure), the pressure on the right side of the valve clack 2 is greater than the pressure on the left side of the valve clack 2, the medium (such as water flow in the valve body 1) flows back, the valve clack 2 moves leftwards rapidly under the pushing of the medium force and the spring force, but when the valve clack 2 approaches the water inlet 11, along with the reduction of the spring force restored by the spring 32 and the action of the damping cylinder 31, the medium outside the cylinder (generally, the medium oil in the damping cylinder) can only flow into the damping cylinder slowly through the tiny damping holes and gaps, the generated medium pushing force is slow, and the impact force of the valve clack 2 is reduced. The collision impact force of the valve clack 2 and the water inlet 11 is reduced, and the noise is reduced.

Preferably, the end face of the water inlet 11 opposite to the valve flap 2 is provided with a soft sealing gasket, and the soft sealing gasket on the end face of the stop check valve with a soft sealing structure can also play a certain role in buffering, preventing impact and reducing noise.

It will be appreciated that the shut-off device 4 is adapted to shut off the valve manually to shut off the medium when shut-off is required.

In some embodiments, said shut-off means 4 comprise: a push rod 41 and a drive assembly 42.

The push rod 41 is arranged in the valve cavity 13, and part of the push rod 41 penetrates through the air guide sleeve 14; and the driving assembly 42 is arranged on the valve cavity 13, and the driving assembly 42 is used for controlling the push rod 41 to horizontally move along the X direction so as to press the valve clack 2. The X direction is the length direction of the push rod 41.

Specifically, the drive assembly 42 includes: a manual wheel 43 provided outside the valve chamber 13; the link mechanism 44 is disposed on the manual wheel 43, the link mechanism 422 is connected to the push rod 41, and the manual wheel 43 can control the link mechanism 44 to apply a horizontal acting force in the X direction to the push rod 41 through rotation.

It is worth mentioning that the link mechanism 44 includes: a valve rod 441, which is connected with the manual wheel 43, wherein the manual wheel 43 can rotate to make the valve rod 441 move in the Y direction in the valve cavity 13; and a connecting rod 442 having both ends movably connected to the push rod 41 and the valve rod 441, respectively, wherein the valve rod 441 can move up and down along the Y direction to change the posture of the connecting rod 442. The link mechanism 44 is provided with a valve rod stopper 443, which is disposed on the valve cavity 13, and the valve rod stopper 443 is provided with a stopper hole along the Y direction for the valve rod 441 to pass through. The Y direction is a longitudinal direction of the stem 441.

The drive assembly 42 further includes: and a push rod bracket 45 supported at the water outlet 12 of the valve body 1, wherein the push rod 41 is connected with the push rod bracket 45 in a sliding manner.

It is worth to explain that, when the upstream end of the valve breaks down or needs to stop the pump for maintenance, the valve clack 2 realizes the non-return function and is in a closed state due to the combined action of the medium force and the spring force behind the valve; in order to prevent the downstream medium from leaking due to unstable pressure, the valve flap 2 needs to be pressed by the push rod at this time, so the manual wheel 43 is rotated clockwise, the nut of the valve rod 441 rotates immediately, the valve rod 441 only moves downwards due to the limitation of the valve rod limiting piece 443, the connecting rod 442 is driven to move downwards, the degree of freedom of the push rod 41 is limited by the flow guide cover, and the push rod 41 moves leftwards under the pushing of the horizontal component force of the connecting rod 442, presses the valve flap 2, cuts off the medium in the pipeline, and the valve is in a closed state, so that the valve realizes a stop function.

Preferably, the stop check valve adopts an anti-scouring structure, and a sealing surface is welded with a scouring-resistant material. When the valve is opened, the fluid can not erode the sealing surface, the damage of cavitation to the sealing surface is reduced, and the service life of the valve is prolonged. The transmission screw thread that valve rod 441 and manual wheel 43 contacted sets up in the valve outside, and the transmission screw thread does not contact with working medium, can not receive the erosion of sea water or other aggressive media, and the transmission part can not take place to sting the phenomenon because of aggressive media's erosion, can not influence the transmission stability of valve, guarantees the life of valve.

In use, as shown in fig. 1, when the pipeline is opened, water flow (or other medium) reaches the water inlet 11, the pressure at the left end of the valve flap 2 in the X direction is increased, so that the valve flap 2 moves rightwards in the X direction, at this time, due to the fact that the movable end of the buffer assembly 3 is fixedly connected with the valve flap 2, the valve flap 2 compresses the spring 32 and the movable end of the damping cylinder 31 is compressed rightwards, and the spring generates a buffer force (namely elastic force) towards the water inlet 11 (namely, towards the left in the X direction) on the valve flap 2 due to the elastic deformation effect of the spring. And because the damping cylinder 31 and the air guide sleeve 14 form a closed buffer cavity, oil medium is arranged in the buffer cavity, and when the movable end moves rightwards along with the valve clack 2, the medium in the buffer cavity can be compressed, so that the medium in the cavity enters the damping cylinder 31, at the moment, because a plurality of fine damping holes are formed in the damping cylinder 31, the medium in the cavity cannot enter the damping cylinder 31 quickly, and only can enter the damping cylinder from the damping holes, and the medium which cannot enter the damping cylinder 31 quickly can generate a buffer force in the opposite direction to the movable end. This makes the movable end moving in a short time receive the buffer force fed back by these mediums, which results in the opening speed and impact force of the valve clack 2 being slowed down and weakened, and the buffer effect is achieved. On the contrary, when pipeline rivers become littleer, valve clack 2 is greater than the left side at X direction right side pressure, and valve clack 2 removes with closed water inlet to water inlet 11, and the expansion end is also along with removing this moment, and buffer chamber medium space grow, intracavity medium from the interior flow buffer chamber of damping cylinder 31, receive the unable fast outflow of damping hole influence equally for the expansion end receives X direction suction right, makes the unable fast movement of valve clack 2 of being connected with the expansion end to water inlet 11. Similarly, the spring is also moved to the left in the X direction with the free end, and is stretched when the spring 32 exceeds its original shape. The restoring force of the spring 32 generates a rightward pulling force on the valve clack 2 and the movable end of the damping cylinder 31 to realize a buffering effect.

In summary, in the check valve in the embodiment of the present invention, the valve flap 2 is provided with the buffer structure, so that the valve flap 2 does not collide violently due to the impact of the medium when being closed and opened, the check valve does not generate noise when being used, and the service life of the check valve is also prolonged. The stop check valve in the embodiment of the invention is provided with an independent stop device, and the stop valve can close the water pump by the independent stop valve. In the embodiment of the invention, the damping cylinder and the spring are adopted as the buffering component, and the buffering action of the damping cylinder and the spring is utilized to slow down the speed of the valve clack for sealing the water inlet or opening the water inlet.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly and encompass, for example, both fixed and removable coupling as well as integral coupling; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A check valve, comprising:

a valve body (1) comprising a water inlet (11) and a valve cavity (13);

a valve flap (2) arranged in the valve chamber (13) and movable in the valve chamber (13) to seal or open the water inlet (11)

The buffer assembly (3) is arranged in the valve cavity (13), the buffer assembly (3) is used for slowing down the moving speed of the valve clack (2), the buffer assembly (3) comprises a flow guide cover and a damping cylinder (31), the flow guide cover is connected with the water inlet (11) through a connecting rod, the damping cylinder (31) is arranged in the flow guide cover in a sealing mode, a damping hole is formed in the damping cylinder (31), the movable end of the damping cylinder (31) is connected with the valve clack (2), and the valve clack (2) can drive the movable end of the damping cylinder (31) to move along the X direction;

the stop device (4) is arranged on the valve cavity (13), and the stop device (4) can press the valve clack (2) to seal the water inlet (11).

2. The check valve of claim 1, wherein the shroud outer side surface configuration is streamlined.

3. The stop-check valve according to claim 1, characterized in that said damping assembly (3) further comprises:

and one end of the spring (32) is arranged at the bottom of the air guide sleeve, and the other end of the spring is connected with the valve clack (2).

4. The non-return stop valve according to claim 1, characterized in that said shut-off means (4) comprise:

the push rod (41) is arranged in the valve cavity (13), and part of the push rod (41) penetrates through the air guide sleeve;

the driving assembly (42) is arranged on the valve cavity (13), the driving assembly (42) is used for controlling the push rod (41) to horizontally move along the X direction so as to press the valve clack (2), and the X direction is the length direction of the push rod (41).

5. The check valve of claim 4, wherein the drive assembly (42) comprises:

a manual wheel (43) which is arranged outside the valve cavity (13);

and the connecting rod mechanism (44) is arranged on the manual wheel (43), the connecting rod mechanism (44) is connected with the push rod (41), and the manual wheel (43) can be controlled by rotating the connecting rod mechanism (44) to apply horizontal acting force in the X direction to the push rod (41).

6. The check valve as recited in claim 5, wherein the linkage (44) comprises:

the valve rod (441) is connected with the manual wheel (43), the manual wheel (43) can make the valve rod (441) move in the Y direction in the valve cavity (13) through rotation, and the Y direction is the length direction of the valve rod (441);

and the two ends of the connecting rod (442) are respectively movably connected with the push rod (41) and the valve rod (441), and the valve rod (441) can move up and down along the Y direction to change the posture of the connecting rod (442).

7. The check valve of claim 6, wherein the linkage (44) further comprises:

and the valve rod limiting piece (443) is arranged on the valve cavity (13), and a limiting hole for the valve rod (441) to pass through is formed in the valve rod limiting piece (443) along the Y direction.

8. The check valve of claim 4, wherein the drive assembly (42) further comprises:

and the push rod bracket (45) is supported at the water outlet (12) of the valve body (1), and the push rod (41) is connected with the push rod bracket (45) in a sliding way.

9. The check valve of claim 1, wherein: and a valve sleeve (5) is arranged at the water inlet (11), and the valve sleeve (5) can be matched with the valve clack (2) to seal the water inlet (11).