CN216344132U

CN216344132U - Check valve with buffer function

Info

Publication number: CN216344132U
Application number: CN202123127829.2U
Authority: CN
Inventors: 龚绍渊; 龚绍港; 龚进新; 吉宏习
Original assignee: Xinhui Valve Co ltd
Current assignee: Xinhui Valve Co ltd
Priority date: 2021-12-14
Filing date: 2021-12-14
Publication date: 2022-04-19
Anticipated expiration: 2031-12-14

Abstract

The utility model discloses a check valve with a buffering function, which belongs to the field of check valves and comprises a valve body, wherein the top end of the valve body is provided with a sealing plate in a limiting way through a bolt, the bottom end of the sealing plate is provided with a moving groove in a chiseled way, a valve plate is arranged inside the valve body, the top end of the valve plate is fixedly connected with a moving rod, the moving rod is positioned inside the moving groove, the two sides of the sealing plate, which are close to the moving groove, are provided with sliding grooves, the inner wall of each sliding groove is connected with a sliding block in a sliding way, the sliding block is fixedly connected with the moving rod, and the top end of the sealing plate, which is close to the sliding groove, is provided with an air inlet groove in a chiseled way, so that when the check valve is used, when the valve plate is jacked due to overlarge inlet pressure, air flow is flushed into the inner part of a sealing ring due to the difference of internal and external pressure, the sealing ring is bulged and deformed, the moving rod is buffered, and the moving rod is prevented from being damaged due to collision, the service life of the check valve is prolonged.

Description

Check valve with buffer function

Technical Field

The utility model relates to the field of check valves, in particular to a check valve with a buffering function.

Background

The check valve is a valve with a circular opening and closing piece acting by self weight and medium pressure to block medium backflow, belongs to the automatic valve class, and is also called a check valve, a one-way valve, a backflow valve or an isolation valve, the movement modes of the valve clack are divided into a lifting type and a swing type, the existing check valve still has certain problems, and certain inconvenience is brought to the use of the check valve.

However, in the process of using most check valves, when the pressure at the inlet is too high, the valve plate is lifted instantly and stopped by collision resistance, the valve plate and the valve rod are easy to damage during collision, the service life of the check valve is shortened, and the use is affected, so that the technology for improving the structure of the check valve is urgently needed to perfect the equipment.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved

Aiming at the problems in the prior art, the utility model aims to provide a check valve with a buffering function, which can realize that when a valve plate is jacked due to overlarge inlet pressure during the use of the check valve, air flow rushes into the sealing ring due to the difference of internal pressure and external pressure, the sealing ring bulges and deforms, a buffering effect is realized on a moving rod, the moving rod is prevented from being damaged due to collision, and the service life of the check valve is prolonged.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

A check valve with a buffering function comprises a valve body, wherein a sealing plate is installed at the top end of the valve body in a limiting mode through a bolt, a moving groove is formed in the bottom end of the sealing plate in an chiseling mode, a valve plate is arranged inside the valve body, a moving rod is fixedly connected to the top end of the valve plate and located inside the moving groove, sliding grooves are formed in the two sides, close to the moving groove, of the sealing plate, a sliding block is connected to the inner wall of each sliding groove in a sliding mode, the sliding block is fixedly connected with the moving rod, an air inlet groove is formed in the top end, close to the sliding groove, of the sealing plate, a sealing ring is connected to the inner top wall of the moving groove in a gluing mode, an open groove is formed in one end, corresponding to the air inlet groove, of the sealing ring, a connecting groove is formed in the end, close to the top wall of the moving groove, a spring is fixedly connected to the inner wall of the groove, the one end fixedly connected with blotter that the recess was kept away from to the spring can realize when using the check valve, when the valve plate was because inlet pressure is too big and by the time-out, because inside and outside pressure difference for the air current rushes into the inside of sealing washer, and the sealing washer is bloated and is taken place deformation, plays the effect of a buffering to the carriage release lever, avoids the carriage release lever to receive the striking and damage, has prolonged the life of check valve.

Further, the department of contacting each other of carriage release lever and shifting chute is equipped with sealed the pad, distance between carriage release lever top and the interior roof of shifting chute is less than the vertical length of spout, is equipped with sealed the pad through the department of contacting each other with carriage release lever and shifting chute, avoids leaving the space between the inner wall of carriage release lever and shifting chute, establishes the vertical length that is less than the spout through the distance between carriage release lever top and the interior roof of shifting chute, avoids restricting the removal of carriage release lever because of spout length is short excessively.

Further, the mutual contact department of spout and slider is equipped with polishing layer, spout and slider constitute sliding construction, through setting up polishing layer, can make the slider remove in the spout in the same direction as smooth, avoid the card to pause, and through the sliding construction who constitutes between spout and the slider, can carry on spacingly to the removal of carriage release lever, prevent the skew.

Further, the air inlet duct is communicated with the sliding chute, the inside of the sliding chute is a vacuum environment, the inside of the sliding chute is set to be the vacuum environment, when the sliding block moves inside the sliding chute, the air inlet duct is communicated with the sliding chute, and the pressure difference generated by the sliding block moving inside the sliding chute can enable air flow to enter the connecting groove through the air inlet duct, so that the sealing ring can be conveniently unfolded.

Further, the material of sealing washer is HNBR hydrogenated nitrile rubber, the cross-section of connecting groove in the sealing washer is the annular, establishes HNBR hydrogenated nitrile rubber for the material through with the sealing washer, can make the sealing washer have splendid anticorrosive, tear-resistant and resistance to compression deformation characteristic, avoids leading to the sealing washer to be torn when filling the sealing washer inside because of gas.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages that:

(1) this scheme can realize when using the check valve, when the valve plate because inlet pressure is too big and when being jacked up, because inside and outside pressure difference for the air current rushes into the inside of sealing washer, and the sealing washer is bloated and is taken place deformation, plays the effect of a buffering to the carriage release lever, avoids the carriage release lever to receive the striking and damage, has prolonged the life of check valve.

(2) The mutual contact department of carriage release lever and shifting chute is equipped with sealed the pad, and the distance between carriage release lever top and the interior roof of shifting chute is less than the vertical length of spout, is equipped with sealed the pad through the mutual contact department with carriage release lever and shifting chute, avoids leaving the space between the inner wall of carriage release lever and shifting chute, establishes the vertical length that is less than the spout through the distance between with carriage release lever top and the interior roof of shifting chute, avoids restricting the removal of carriage release lever because of spout length weak point.

(3) The mutual contact department of spout and slider is equipped with polishing layer, and the spout constitutes sliding construction with the slider, through setting up polishing layer, can make the slider remove in the spout in the same direction as smooth, avoids the card to pause, and through the sliding construction who constitutes between spout and the slider, can carry on spacingly to the removal of carriage release lever, prevents the skew.

(4) The air inlet duct is communicated with the sliding chute, the inside of the sliding chute is a vacuum environment, the inside of the sliding chute is set to be the vacuum environment, the sliding block can be enabled to be communicated with the sliding chute when moving inside the sliding chute, and the sliding block can enable air flow to enter the inside of the connecting groove through the air inlet duct due to the pressure difference generated by movement of the sliding block in the sliding chute, so that the sealing ring can be conveniently propped open.

(5) The material of sealing washer is HNBR hydrogenated nitrile rubber, and the cross-section of connecting groove is the annular in the sealing washer, establishes HNBR hydrogenated nitrile rubber through the material with the sealing washer for the sealing washer has splendid anticorrosive, tear resistance and resistance to compression deformation characteristic, avoids leading to the sealing washer to be torn when filling the sealing washer inside because of the gas.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic top view of the cross-sectional structure of the present invention taken along line B-B;

FIG. 3 is an enlarged view of a portion A of FIG. 1 according to the present invention.

The reference numbers in the figures illustrate:

1. a valve body; 2. a closing plate; 3. a moving groove; 4. a valve plate; 5. a travel bar; 6. a chute; 7. a slider; 8. an air inlet groove; 9. a seal ring; 10. an open slot; 11. connecting grooves; 12. a groove; 13. a spring; 14. a cushion pad.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

referring to fig. 1-3, a check valve with a buffering function comprises a valve body 1, a sealing plate 2 is installed at the top end of the valve body 1 in a limiting manner through a bolt, a moving groove 3 is formed at the bottom end of the sealing plate 2, a valve plate 4 is arranged inside the valve body 1, a moving rod 5 is fixedly connected to the top end of the valve plate 4, the moving rod 5 is located inside the moving groove 3, sliding grooves 6 are formed in the two sides, close to the moving groove 3, of the sealing plate 2, sliding blocks 7 are connected to the inner wall of the sliding grooves 6 in a sliding manner, the sliding blocks 7 are fixedly connected to the moving rod 5, an air inlet groove 8 is formed in the top end, close to the sliding grooves 6, of the sealing plate 2, an inner top wall of the moving groove 3 is connected with a sealing ring 9 in a gluing manner, an open groove 10 is formed in one end, corresponding to the air inlet groove 8, a connecting groove 11 is formed in one end, close to the open groove 10, of the sealing ring 9, a groove 12 is formed in the top wall, close to the moving groove 3, inner wall department fixedly connected with spring 13 of recess 12, spring 13 keeps away from one end fixedly connected with blotter 14 of recess 12, can realize when using the check valve, when valve plate 4 was because inlet pressure is too big and when being jacked up, because inside and outside pressure difference for the air current rushed into the inside of sealing washer 9, sealing washer 9 was bloated and is taken place deformation, play the effect of a buffering to carriage release lever 5, avoid carriage release lever 5 to receive the striking and damage, prolonged the life of check valve.

Referring to fig. 1, a sealing pad is disposed at a contact position between the moving rod 5 and the moving slot 3, a distance between the top end of the moving rod 5 and the inner top wall of the moving slot 3 is smaller than a vertical length of the sliding slot 6, the sealing gasket is arranged at the mutual contact part of the moving rod 5 and the moving groove 3, so that a gap is prevented from being left between the moving rod 5 and the inner wall of the moving groove 3, the distance between the top end of the moving rod 5 and the inner top wall of the moving groove 3 is set to be smaller than the vertical length of the sliding groove 6, so that the situation that the moving rod 5 is limited due to the fact that the length of the sliding groove 6 is too short is avoided, a polishing layer is arranged at the contact position of the sliding groove 6 and the sliding block 7, the sliding groove 6 and the sliding block 7 form a sliding structure, and through the arrangement of the polishing layer, the sliding block 7 can move smoothly in the sliding groove 6 to avoid blocking, and the sliding structure formed between the sliding groove 6 and the sliding block 7 can limit the movement of the moving rod 5 to prevent deviation.

Referring to fig. 2-3, the air inlet duct 8 is communicated with the chute 6, the inside of the chute 6 is a vacuum environment, when the slider 7 moves inside the chute 6, the air inlet duct 8 is communicated with the chute 6, and a pressure difference generated by the movement of the slider 7 inside the chute 6 enables an air flow to enter the inside of the connecting groove 11 through the air inlet duct 8, so as to open the sealing ring 9, the sealing ring 9 is made of HNBR hydrogenated nitrile rubber, the cross section of the connecting groove 11 in the sealing ring 9 is annular, and the sealing ring 9 is made of HNBR hydrogenated nitrile rubber, so that the sealing ring 9 has excellent corrosion resistance, tear resistance and compression deformation resistance, and the sealing ring 9 is prevented from being torn due to the gas filled inside the sealing ring 9.

In the utility model, when a related technician uses the device, when the pressure of an inlet in the valve body 1 is overlarge, the valve plate 4 is jacked up, the valve plate 4 drives the movable rod 5 to move, the movable rod 5 drives the sliding block 7 to move at the inner wall of the sliding groove 6, the inner part of the sliding groove 6 is in a vacuum environment, so that when the sliding block 7 moves, air flow is driven to enter the connecting groove 11 through the air inlet groove 8 and the open groove 10 through the pressure difference between the inside and the outside, the sealing ring 9 is propped open to deform and is propped against the outer wall of the movable rod 5, meanwhile, the top end of the movable rod 5 is contacted with the buffer pad 14, the spring 13 is compressed, a buffer and shock absorption effect can be realized on the movement of the movable rod 5, when the movable rod 5 moves downwards, the sealing ring 9 restores to the original shape, the influence on the elasticity of the sealing ring 9 due to long-term use is avoided, compared with the prior art, the utility model can realize that when the check valve is used, when the valve plate 4 is jacked up due to the overlarge pressure of the inlet, due to the internal and external pressure difference, air flow rushes into the sealing ring 9, the sealing ring 9 bulges and deforms, the movable rod 5 is buffered, the movable rod 5 is prevented from being damaged due to impact, and the service life of the check valve is prolonged.

The foregoing is only a preferred embodiment of the present invention; the scope of the utility model is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.

Claims

1. A check valve with a buffering function comprises a valve body (1), and is characterized in that: the top of the valve body (1) is provided with a sealing plate (2) in a limiting mode through a bolt, the bottom of the sealing plate (2) is provided with a moving groove (3) in a chiseling mode, a valve plate (4) is arranged inside the valve body (1), the top end of the valve plate (4) is fixedly connected with a moving rod (5), the moving rod (5) is located inside the moving groove (3), sliding grooves (6) are formed in the two sides, close to the moving groove (3), of the sealing plate (2), sliding blocks (7) are connected to the inner wall of the sliding grooves (6) in a sliding mode, the sliding blocks (7) are fixedly connected with the moving rod (5), the top end, close to the sliding grooves (6), of the sealing plate (2) is provided with an air inlet groove (8) in a chiseling mode, the inner top wall of the moving groove (3) is connected with a sealing ring (9) in a gluing mode, one end, corresponding to the air inlet groove (8), of the sealing ring (9) is provided with an open groove (10), connecting groove (11) have been seted up to the one end that sealing washer (9) are close to open slot (10), roof department that closing plate (2) are close to shifting chute (3) cuts a groove (12), the inner wall department fixedly connected with spring (13) of groove (12), the one end fixedly connected with blotter (14) of groove (12) are kept away from in spring (13).

2. The check valve with a buffering function as claimed in claim 1, wherein: the mutual contact department of carriage release lever (5) and shifting chute (3) is equipped with sealed the pad, distance between carriage release lever (5) top and the interior roof of shifting chute (3) is less than the vertical length of spout (6).

3. The check valve with a buffering function as claimed in claim 1, wherein: the polishing layer is arranged at the contact position of the sliding groove (6) and the sliding block (7), and the sliding groove (6) and the sliding block (7) form a sliding structure.

4. The check valve with a buffering function as claimed in claim 1, wherein: the air inlet groove (8) is communicated with the sliding groove (6), and the inside of the sliding groove (6) is in a vacuum environment.

5. The check valve with a buffering function as claimed in claim 1, wherein: the material of sealing washer (9) is HNBR hydrogenated nitrile rubber, the cross-section of connecting groove (11) is the annular in sealing washer (9).