CN219139940U

CN219139940U - Rubber flap check valve with high sealing performance

Info

Publication number: CN219139940U
Application number: CN202222560224.0U
Authority: CN
Inventors: 张荣武; 张宇; 刘姗姗; 江鸿
Original assignee: Tongling Wusong Valve Co ltd
Current assignee: Tongling Wusong Valve Co ltd
Priority date: 2022-09-27
Filing date: 2022-09-27
Publication date: 2023-06-06
Anticipated expiration: 2032-09-27

Abstract

The utility model discloses a rubber flap check valve with high tightness, which relates to the technical field of check valves and comprises a valve body, wherein a medium flow passage is formed in the valve body, a movable cavity is formed in the middle position of the medium flow passage, two supporting ring frames are welded on the inner wall of the movable cavity along the horizontal direction, a connecting rod is slidably arranged on the middle part of the two supporting ring frames, a front cone block and a rear rubber flap sleeve are respectively arranged at two ends of the connecting rod, the cross section of the medium flow passage is in a transverse hourglass shape, and the rear rubber flap sleeve is matched with the inner wall at one end of the medium flow passage. In the use process, the rear rubber valve sleeve is driven to block one end of the medium flow channel by utilizing the instant generation of medium backflow, the connecting sleeve is driven to move downwards again by utilizing the pressure of the medium backflow, and the connecting sleeve is clamped by the spherical blocking groove and the blocking ball, so that the rear rubber valve sleeve can completely block one end of the medium flow channel without falling off, and the integral structure has higher tightness.

Description

Rubber flap check valve with high sealing performance

Technical Field

The utility model relates to the technical field of check valves, in particular to a rubber flap check valve with high sealing performance.

Background

The check valve is one of the connecting members between the pipes, the pipes and the devices, and its main function is to prevent the medium flowing therein from flowing back, and depending on the sealing member in the check valve, including the valve stem/valve plate or the rubber flap, the rubber flap structure is the simplest, and the rebound resilience and plasticity of the rubber material are mainly utilized.

The rubber material is softer in texture, deformation of the manufactured rubber flap or rubber sleeve under the action of external force cannot be accurately controlled, and in addition, the sealing piece made of the rubber material has better sealing performance, but the deformation of the rubber material is based on the external force, the rubber flap in the check valve is required to depend on pressure difference at two sides of the rubber flap, in the actual use process, when the pressure generated at the moment of medium backflow is larger, the pressure is slowly reduced, even the deformation process of the rubber flap is difficult to maintain, so that the sealing performance of the whole check valve is lower and lower, and the problem that backflow cannot be caused cannot occur.

The present application proposes a solution to the above technical problem.

Disclosure of Invention

The utility model aims to provide a rubber flap check valve with high tightness, which is used for solving the problems that the tightness of the rubber flap to a medium in a flow passage inside the check valve is lower and even the backflow of the medium cannot be kept because of the change of external force in the current process of using the rubber flap as a sealing element in the check valve.

The aim of the utility model can be achieved by the following technical scheme: the novel valve comprises a valve body, a medium flow passage is formed in the valve body, a movable cavity is formed in the middle position of the medium flow passage, two supporting ring frames are welded on the inner wall of the movable cavity along the horizontal direction, connecting rods are slidably mounted on the middle parts of the supporting ring frames, a front cone block and a rear rubber valve sleeve are respectively mounted at two ends of each connecting rod, the cross section of the medium flow passage is in a transverse hourglass shape, the rear rubber valve sleeve is matched with the inner wall of one end of the medium flow passage, and a stop block is mounted on the outer wall of one side, close to the front cone block, of each connecting rod.

Further provided is that: the valve body is located the position directly over the movable cavity and is provided with a pressure cavity, a sliding block is slidably arranged in the pressure cavity along the vertical direction, the valve body is located the position above the medium flow channel and is provided with a front flow channel and a rear flow channel respectively, and the front flow channel and the rear flow channel are communicated with the pressure cavity and the medium flow channel respectively.

Further provided is that: the front runner is positioned at the joint position of the pressure cavity and is higher than the joint position of the rear runner.

Further provided is that: the connecting guide rod is arranged at the center point of the lower surface of the sliding block and downwards penetrates into the movable cavity, the connecting sleeve is arranged at the tail end of the connecting guide rod, and the movable groove is formed in the connecting sleeve.

Further provided is that: the connecting sleeve is positioned at the lower side of the movable groove and is provided with a spherical blocking groove, and the connecting rod is provided with a blocking ball matched with the spherical blocking groove. Further provided is that:

the utility model has the following beneficial effects:

1. in the use process, when the rear rubber valve sleeve does not interfere with normal flow of a medium, pressure generated when the medium flows back instantaneously acts on the rear rubber valve sleeve, so that the rear rubber valve sleeve blocks one end of a medium flow channel, and the backflow prevention effect is achieved;

2. in addition, when the medium flows, the medium also enters the pressure cavity along the front runner or the rear runner, so that the connecting sleeve is driven to move downwards or upwards under the action of pressure, and in the medium backflow process, the medium enters the pressure cavity through the rear runner, and when the connecting sleeve is driven to move upwards under the action of the sliding block, the connecting rod is clamped through the spherical blocking groove and the blocking ball, so that the rear rubber valve sleeve is ensured not to be separated from the inner wall of the medium runner.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a rubber flap check valve with high sealing performance according to the present utility model;

FIG. 2 is a cut-away view of a valve body member of a rubber flap check valve having high tightness in accordance with the present utility model;

FIG. 3 is a front view of FIG. 2 of a high tightness rubber flap check valve according to the present utility model;

fig. 4 is a cut-away view of a joint sleeve component in a rubber flap check valve with high tightness according to the present utility model.

In the figure: 1. a valve body; 2. a media flow path; 3. a rear rubber flap sleeve; 4. a connecting rod; 5. a front cone block; 6. a front flow passage; 7. a pressure chamber; 8. a rear flow passage; 9. a support ring frame; 10. a connecting sleeve; 11. a movable cavity; 12. a stop block; 13. a movable groove; 14. a spherical baffle groove; 15. a blocking ball; 16. connecting a guide rod; 17. a sliding block.

Detailed Description

The technical solutions of the present utility model will be clearly and completely described in connection with the embodiments, and it is obvious that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

The back flow valve has the function of blocking the medium flowing channel by utilizing the back rubber valve sleeve in the medium back flow process on the premise of not interfering the medium to normally flow, and therefore, the following technical scheme is provided:

referring to fig. 1, 2 and 3, a rubber flap check valve with high tightness comprises a valve body 1, a medium flow channel 2 is arranged in the valve body 1, a movable cavity 11 is arranged in the middle of the medium flow channel 2, two supporting ring frames 9 are welded on the inner wall of the movable cavity 11 along the horizontal direction, a connecting rod 4 is slidably arranged on the middle part of the two supporting ring frames 9, a front cone block 5 and a rear rubber flap sleeve 3 are respectively arranged at two ends of the connecting rod 4, the cross section of the medium flow channel 2 is in a transverse hourglass shape, the rear rubber flap sleeve 3 is matched with the inner wall of one end of the medium flow channel 2, a stop block 12 is arranged on the outer wall of one side, close to the front cone block 5, of the connecting rod 4, a pressure cavity 7 is arranged on the position right above the movable cavity 11, a sliding block 17 is slidably arranged in the pressure cavity 7, a front flow channel 6 and a rear flow channel 8 are respectively arranged on the position above the medium flow channel 2, and the front flow channel 6 and the rear flow channel 8 are respectively communicated with the pressure cavity 7 and the medium flow channel 2.

Work and principle: the medium flows in the medium flow channel 2 in the mode of flowing along the direction from the front cone block 5 to the rear rubber valve sleeve 3 when the integral structure is arranged between the pipelines or the pipelines and the equipment, and then flows along the direction from the rear rubber valve sleeve 3 to the front cone block 5 when the medium flows back, in the process, the medium pushes the rear rubber valve sleeve 3 to move towards the movable cavity 11, so that one end of the medium flow channel 2 is blocked under the action of the rear rubber valve sleeve 3, and the medium backflow can be prevented.

Example two

For the working principle described in the embodiment, when the rear rubber valve sleeve blocks one end of the medium flow channel, in order to avoid that the rear rubber valve sleeve is separated from the medium flow channel when the pressure difference at two sides of the rear rubber valve sleeve is lost, the medium still flows back, and therefore the following technical scheme is highlighted:

referring to fig. 1, 3 and 4, the front runner 6 is located at a position higher than the rear runner 8 at a position of the pressure chamber 7, a connecting guide rod 16 is installed at a central point of the lower surface of the sliding block 17, the connecting guide rod 16 penetrates downwards into the movable chamber 11, a connecting sleeve 10 is installed at the end position of the connecting guide rod 16, a movable groove 13 is formed in the connecting sleeve 10,

the joint sleeve 10 is provided with a spherical blocking groove 14 at the lower side of the movable groove 13, and the connecting rod 4 is provided with a blocking ball 15 matched with the spherical blocking groove 14.

Working principle: when the medium normally circulates, the medium flows along the medium flow channel 2 and enters the pressure cavity 7 along the front flow channel 6, so that the sliding block 17 moves downwards, the connecting rod 4 is positioned at the upper side of the movable groove 13, and the connecting rod 4 is not blocked by the connecting sleeve 10;

however, when the medium flows back, the medium enters the pressure intensity 7 from the back flow channel 8, drives the sliding block 17 to move upwards, so that the connecting sleeve 10 can be driven, and meanwhile, when the back rubber valve sleeve 3 is driven to block one end of the medium flow channel 2 under the pressure effect generated by the medium backflow, and when the sliding block 17 moves upwards, the connecting sleeve 10 is driven to move upwards, meanwhile, the blocking ball 15 is blocked by the spherical blocking groove 14, and in the process, the connecting rod 4 is blocked by the spherical blocking groove 14 and the blocking ball 15, so that the back rubber valve sleeve 3 cannot move when the medium flow channel 2 is blocked;

when the medium flows again normally, the medium enters the pressure chamber 7 and the medium flow channel 2 along the front flow channel 6 again, firstly the sliding block 17 drives the connecting sleeve 10 to move downwards, so that the blocking ball 15 is separated from the spherical blocking groove 14, and the connecting rod 4 can slide normally in the movable groove 13.

To sum up: when the medium flows, the medium also enters the pressure cavity along the front runner or the rear runner, so that the connecting sleeve is driven to move downwards or upwards under the action of pressure, and in the medium backflow process, the medium enters the pressure cavity through the rear runner, and when the connecting sleeve is driven to move upwards under the action of the sliding block, the connecting rod is clamped through the spherical blocking groove and the blocking ball, so that the rear rubber valve sleeve is ensured not to be separated from the inner wall of the medium runner.

The foregoing is merely illustrative and explanatory of the utility model, as it is well within the scope of the utility model as claimed, as it relates to various modifications, additions and substitutions for those skilled in the art, without departing from the inventive concept and without departing from the scope of the utility model as defined in the accompanying claims.

In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the utility model disclosed above are intended only to assist in the explanation of the utility model. The preferred embodiments are not intended to be exhaustive or to limit the utility model to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best understand and utilize the utility model. The utility model is limited only by the claims and the full scope and equivalents thereof.

Claims

1. The utility model provides a rubber lamella check valve with high leakproofness, includes valve body (1), its characterized in that, medium runner (2) have been seted up to valve body (1) inside, movable cavity (11) have been seted up on the intermediate position of medium runner (2), two support ring frame (9) have been welded along the horizontal direction on movable cavity (11) inner wall, two slidable mounting has connecting rod (4) on support ring frame (9) mid portion, preceding cone piece (5) and back rubber lamella cover (3) are installed respectively at connecting rod (4) both ends, the transversal hourglass form of personally submitting of medium runner (2), match between back rubber lamella cover (3) and the medium runner (2) one end inner wall, install dog (12) on one side outer wall that connecting rod (4) are close to preceding cone piece (5).

2. The rubber flap check valve with high tightness according to claim 1, wherein the valve body (1) is located right above the movable cavity (11) and is provided with a pressure cavity (7), a sliding block (17) is slidably mounted in the pressure cavity (7) along the vertical direction, the valve body (1) is located above the medium runner (2) and is provided with a front runner (6) and a rear runner (8) respectively, and the front runner (6) and the rear runner (8) are communicated with the pressure cavity (7) and the medium runner (2) respectively.

3. A rubber flap check valve with high tightness according to claim 2, characterized in that the front flow channel (6) is located at a higher interface position of the pressure chamber (7) than the rear flow channel (8) is located at an interface position of the pressure chamber (7).

4. The rubber flap check valve with high tightness according to claim 2, wherein a connecting guide rod (16) arranged downwards is arranged at the center point of the lower surface of the sliding block (17), the connecting guide rod (16) penetrates downwards into the movable cavity (11), a connecting sleeve (10) is arranged at the tail end position of the connecting guide rod (16), and a movable groove (13) is formed in the connecting sleeve (10).

5. The rubber flap check valve with high tightness according to claim 4, wherein the connecting sleeve (10) is provided with a spherical blocking groove (14) at the lower side of the movable groove (13), and the connecting rod (4) is provided with a blocking ball (15) matched with the spherical blocking groove (14).