Controllable check valve

Abstract

The utility model discloses a controllable check valve which comprises a valve body with an installation cavity, a valve clack, a rocker, a fork-shaped piece and a valve cover, the valve clack rotates along with the rocker and has an opening state and a closing state, and when the valve clack is in the opening state, a controllable opening and closing assembly used for fixing the valve clack to be in the opening state is arranged between the rocker and the valve body. The controllable opening and closing assembly has an opening state and a closing state, and when the controllable opening and closing assembly is in the closing state, the rocker and the controllable opening and closing assembly are matched to fix the valve clack to be in the opening state; when the controllable opening and closing assembly is in the opening state, the controllable opening and closing assembly does not interfere with rotation of the rocker. The controllable opening and closing assembly is provided with a control end located outside the valve body, and the control end controls the controllable opening and closing assembly to be switched between the opening state and the closing state. The automatic non-return valve has the following advantages and effects that automatic non-return and controllable closing of the valve can be realized, so that the use requirements of special scenes are met, the use cost is reduced, and the universal adaptability of the valve is improved.

Description

Technical Field

[0001] The utility model relates to a valve, in particular to a controllable check valve. Background Art

[0002] A check valve is a valve with a circular disc as the opening and closing part. It blocks the backflow of the medium by its own weight and the pressure of the medium. It is an automatic valve and is also called a non-return valve, one-way valve, reflux valve or isolation valve. The disc movement mode is divided into lifting type and swing type.

[0003] The application fields and application conditions of check valves are very wide, and there are many special use scenarios with special requirements. For example, in many working conditions, when the pipeline needs to be inspected and maintained or cleaned, it is necessary to ensure the two-way conduction of the pipeline for maintenance or cleaning. At this time, the one-way structure check valve will interfere with the orderly progress of the above work, resulting in the inability of the existing check valves on the market to adapt to the above-mentioned special working conditions. Therefore, it is necessary to replace other more expensive types of valves that will not interfere with the above operations, which greatly increases the user's use cost and reduces the universal adaptability of existing check valves. Utility Model Content

[0004] The purpose of the utility model is to provide a controllable check valve, which can realize automatic non-return and controllable closing of the valve, so as to adapt to the use requirements of special scenes, reduce the use cost and improve the universal adaptability of the valve.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions: a controllable check valve, comprising a valve body with an installation cavity, a valve disc arranged in the installation cavity, a rocker connecting the valve disc, a fork-shaped piece fixedly arranged in the installation cavity and hinged to the rocker, and a valve cover arranged on the valve body, the valve disc has an open state and a closed state as the rocker rotates, when the valve disc is in the open state, a controllable separation and combination component for fixing the valve disc in the open state is arranged between the rocker and the valve body, the controllable separation and combination component has a separation state and a closing state, when the controllable separation and combination component is in the closing state, the rocker rotates toward one side of the controllable separation and combination component and cooperates with the controllable separation and combination component to fix the valve disc in the open state; when the controllable separation and combination component is in the separation state, the controllable separation and combination component does not interfere with the normal rotation of the rocker; the controllable separation and combination component has a control end located outside the valve body, and the control end controls the controllable separation and combination component to switch between the separation state and the closing state.

[0006] By adopting the above technical solution, the control end arranged outside the valve body can control the controllable separation and combination component to switch between the open state and the closed state at any time. When the controllable separation and combination component is in the open state, it will not interfere with the normal rotation of the rocker and the valve disc, so that the valve can be in a normal automatic non-return state. When it is necessary to control the valve to be in a two-way open state, the controllable separation and combination component is controlled to be in the closed state, and the fluid medium impacts the valve disc to drive the rocker to rotate toward one side of the controllable separation and combination component. Under the action of the controllable separation and combination component, it cooperates with the rocker to fix the valve disc to remain in the open state. The above structure is used to realize the switching of the valve between automatic non-return and controllable closure, so as to adapt to the use requirements of special scenarios, reduce the use cost, and improve the universal adaptability of the valve.

[0007] It is further configured as follows: the controllable separation and combination component includes a separation and combination seat arranged on the valve body and located in the installation cavity, a fixed claw moving with the rocker, a separation and combination claw slidably arranged on the separation and combination seat and reciprocating toward one side of the fixed claw movement path, and a clamping spring driving the separation and combination claw to move toward one side of the fixed claw movement path; a guiding structure for guiding the separation and combination claw to move away from the fixed claw movement path is formed between the separation and combination claw and the fixed claw; when the fixed claw rotates toward the separation and combination claw, the separation and combination claw is guided by the provided guiding structure to retract and return to its original position, thereby forming a snap-fit ​​fixation between the two.

[0008] By adopting the above technical solution, the rocker drives the fixed claw to rotate toward one side of the controllable separation and combination component. When the fixed claw contacts the separation and combination claw, the separation and combination claw is driven to retract under the action of the guiding structure so that the fixed claw can pass over the separation and combination claw. The retracted separation and combination claw is reset and extended under the action of the tightening spring to cooperate with the fixed claw to form a snap fit, thereby realizing the opening and fixing function of the valve disc. The structure is simple and the production cost is lower.

[0009] It is further configured as follows: the separation and combination seat is seal-rotatably arranged on the valve body and extends outward through the valve body to form the control end, and a positioning structure is provided between the separation and combination seat and the valve body.

[0010] By adopting the above technical solution, by setting the separation and combination seat as a rotating structure to control the engagement or separation of the fixed claw and the separation and combination claw, the controllable separation and combination component can be switched between the open state and the closed state; and by setting a positioning structure to position the controllable separation and combination component in the two states, it can avoid misoperation and provide a mechanical feedback of the operation, so that the operator can achieve more precise control.

[0011] It is further configured as follows: the positioning structure includes a slide groove arranged on the wall of the installation cavity corresponding to the position of the separation and combination seat, a positioning ball slidably arranged in the slide groove, a driving spring that drives the positioning ball to press against the separation and combination seat, and two positioning grooves arranged at the position of the slide groove corresponding to the separation and combination seat. The two positioning grooves can be used for the positioning balls to be embedded in the separation and combination seat to form positioning as the separation and combination seat rotates. When the positioning ball is embedded in one of the positioning grooves, the fixing claw is fixed with the separation and combination claw; when the positioning ball is embedded in the other positioning groove, the fixing claw is separated from the separation and combination claw.

[0012] By adopting the above technical solution, the separation of the positioning ball and the positioning groove can be achieved by applying a large steering force to the separation and combination seat through the control end, so as to operate the separation and combination seat to rotate; when the positioning groove rotates to a position corresponding to the positioning ball, the positioning ball is embedded in the positioning groove under the action of the driving spring to form a positioning and provide a feedback sound during embedding, so as to ensure the accuracy of control.

[0013] It is further configured that: the guiding structure includes a guiding inclined surface formed on the fixing claw and a matching inclined surface formed on the separation and combination claw and matching with the guiding inclined surface.

[0014] By adopting the above technical solution, the cooperation between the guiding inclined surface and the matching inclined surface is used to change the direction of force, so that the moving fixed claw can drive the separation and combination claw to move.

[0015] In summary, the utility model has the following beneficial effects: the utility model can realize automatic non-return and controllable closing of the valve, so as to adapt to the use requirements of special scenes, reduce the use cost, and improve the universal adaptability of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment;

[0017] Figure 2 for Figure 1 Enlarged view of part A in the middle.

[0018] In the figure: 1. installation cavity; 2. valve body; 3. valve disc; 4. rocker; 5. fork-shaped piece; 6. valve cover; 7. controllable separation and combination assembly; 71. separation and combination seat; 72. fixing claw; 73. separation and combination claw; 74. tightening spring; 8. control end; 9. guide structure; 91. guide slope; 92. matching slope; 10. positioning structure; 101. slide groove; 102. positioning ball; 103. drive spring; 104. positioning groove. DETAILED DESCRIPTION

[0019] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0020] refer to Figure 1 and Figure 2A controllable check valve comprises a valve body 2 having an installation cavity 1, a valve disc 3 arranged in the installation cavity 1, a rocker 4 fixedly connected to the valve disc 3, a fork-shaped member 5 fixedly arranged on the inner wall of the installation cavity 1 and hinged to the rocker 4, and a valve cover 6 fixedly arranged on the valve body 2. The valve disc 3 rotates with the rocker 4 and has an open state and a closed state. When the valve disc 3 is in the open state, a controllable separation and combination component 7 for fixing the valve disc 3 in the open state is arranged between the rocker 4 and the valve body 2. The controllable separation and combination component 7 has an open state and a closed state. When the controllable separation and combination component 7 is in the closed state, the rocker 4 rotates toward one side of the controllable separation and combination component 7 to cooperate with the controllable separation and combination component 7 to fix the valve disc 3 in the open state; when the controllable separation and combination component 7 is in the open state, the controllable separation and combination component 7 does not interfere with the normal rotation of the rocker 4. The controllable separation and combination component 7 has a control end 8 located outside the valve body 2, and the control end 8 controls the controllable separation and combination component 7 to switch between the open state and the closed state.

[0021] The controllable separation and combination assembly 7 includes a separation and combination seat 71 disposed on the valve body 2 and located in the installation cavity 1, a fixed claw 72 integrally disposed on the rocker 4, a separation and combination claw 73 slidably disposed on the separation and combination seat 71 and reciprocating toward one side of the movement path of the fixed claw 72, and a pressing spring 74 driving the separation and combination claw 73 to move toward one side of the movement path of the fixed claw 72. One end of the pressing spring 74 is fixedly connected to the separation and combination seat 71, and the other end is fixedly connected to the separation and combination claw 73.

[0022] A guide structure 9 is formed between the separation claw 73 and the fixed claw 72 to guide the separation claw 73 to move away from the fixed claw 72 movement path. When the fixed claw 72 rotates toward the separation claw 73, the separation claw 73 is guided by the provided guide structure 9 to retract and return to the original position to form a snap-fit ​​fixation between the two. The separation seat 71 is sealed and rotatably provided on the valve body 2 and extends outward through the valve body 2 to form the control end 8. A positioning structure 10 and a sealing ring are provided between the separation seat 71 and the valve body 2.

[0023] The positioning structure 10 comprises a slide groove 101 provided on the wall of the installation cavity 1 corresponding to the position of the separation seat 71, a positioning ball 102 slidably provided in the slide groove 101, a driving spring 103 driving the positioning ball 102 to press against the separation seat 71, and two positioning grooves 104 provided on the separation seat 71 corresponding to the slide groove 101. The two positioning grooves 104 can be inserted into the positioning ball 102 to form a positioning when the separation seat 71 rotates. When the positioning ball 102 is inserted into one of the positioning grooves 104, the fixing claw 72 is fixedly engaged with the separation claw 73; when the positioning ball 102 is inserted into the other positioning groove 104, the fixing claw 72 is separated from the separation claw 73.

[0024] The guide structure 9 includes a guide inclined surface 91 formed on the fixing claw 72 and a matching inclined surface 92 formed on the separation and engagement claw 73 and matching with the guide inclined surface 91 .

[0025] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A controllable check valve, comprising a valve body (2) having a mounting cavity (1), a valve flap (3) disposed in the mounting cavity (1), a rocker (4) connected to the valve flap (3), a fork-shaped member (5) fixedly disposed in the mounting cavity (1) and hingedly connected to the rocker (4), and a valve cover (6) disposed on the valve body (2), characterized in that: The valve flap (3) rotates with the rocker (4) and has an open state and a closed state. When the valve flap (3) is in the open state, a controllable splitting and combining component (7) is provided between the rocker (4) and the valve body (2) for fixing the valve flap (3) in the open state. The controllable splitting and combining component (7) has an open state and a closed state. When the controllable splitting and combining component (7) is in the closed state, the rocker (4) rotates toward one side of the controllable splitting and combining component (7) to cooperate with the controllable splitting and combining component (7) to fix the valve flap (3) in the open state. When the controllable splitting and combining component (7) is in the open state, the controllable splitting and combining component (7) does not interfere with the normal rotation of the rocker (4). The controllable splitting and combining component (7) has a control end (8) located outside the valve body (2). The control end (8) controls the controllable splitting and combining component (7) to switch between the open state and the closed state.

2. The controllable check valve according to claim 1, characterized in that: The controllable separation and combination component (7) comprises a separation and combination seat (71) arranged on the valve body (2) and located in the installation cavity (1), a fixed claw (72) moving with the rocker (4), a separation and combination claw (73) slidably arranged on the separation and combination seat (71) and reciprocating toward one side of the movement path of the fixed claw (72), and a clamping spring (74) driving the separation and combination claw (73) to move toward one side of the movement path of the fixed claw (72), a guiding structure (9) for guiding the separation and combination claw (73) to move away from one side of the movement path of the fixed claw (72) is formed between the separation and combination claw (73) and the fixed claw (72), and when the fixed claw (72) rotates toward the separation and combination claw (73), the separation and combination claw (73) is guided by the provided guiding structure (9) to retract and return to its original position, so as to form a snap-fit ​​fixation between the two.

3. The controllable check valve according to claim 2, characterized in that: The separation and combination seat (71) is sealingly rotatably arranged on the valve body (2) and extends outward through the valve body (2) to form the control end (8). A positioning structure (10) is provided between the separation and combination seat (71) and the valve body (2).

4. The controllable check valve according to claim 3, characterized in that: The positioning structure (10) comprises a slide groove (101) arranged on the wall of the installation cavity (1) corresponding to the position of the separation and combination seat (71), a positioning ball (102) slidably arranged in the slide groove (101), a driving spring (103) driving the positioning ball (102) to press against the separation and combination seat (71), and two positioning grooves (104) arranged on the separation and combination seat (71) at the position corresponding to the slide groove (101), the two positioning grooves (104) can be provided with the positioning ball (102) to be embedded in the two positioning grooves (104) when the separation and combination seat (71) rotates to form a positioning, when the positioning ball (102) is embedded in one of the positioning grooves (104), the fixing claw (72) and the separation and combination claw (73) are fixed by snapping; when the positioning ball (102) is embedded in the other positioning groove (104), the fixing claw (72) and the separation and combination claw (73) are separated.

5. The controllable check valve according to claim 2, characterized in that: The guide structure (9) comprises a guide inclined surface (91) formed on the fixing claw (72) and a matching inclined surface (92) formed on the separation and combination claw (73) and matching with the guide inclined surface (91).

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