Intercepting mechanism of check valve and check valve

Abstract

The utility model relates to the technical field of check valves, and discloses a shutoff mechanism of a check valve and the check valve.The shutoff mechanism of the check valve comprises a check valve body, a movable groove is formed in the inner wall of the top of the check valve body, a rotating shaft is movably installed on the inner wall of the movable groove, and the end, away from the movable groove, of the rotating shaft is fixedly connected with a check plate; a connecting rod is fixedly connected to the wall face of one side of the non-return plate, and a driven wedge block is movably installed at the end, away from the non-return plate, of the connecting rod. The rotating hand wheel drives the threaded rod to rotate and move downwards, the threaded rod pushes the piston to move downwards, so that the round rod and the driving wedge-shaped block are driven to move downwards together, and the driving wedge-shaped block makes contact with the driven wedge-shaped block and slides along the surface of the driven wedge-shaped block; the upper end of the driving wedge-shaped block can press the upper end of the driven wedge-shaped block, meanwhile, the spring is compressed, the non-return plate is effectively jacked tightly, it is ensured that the non-return plate is stable, and then the closure function is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to check valve technical field especially relates to a check valve's cut off mechanism and check valve. BACKGROUND

[0002] A check valve is a valve device used to prevent fluid from flowing backward in a pipeline. Its main function is to automatically close the valve when the flow direction of fluid in the pipeline changes, preventing fluid from flowing backward and ensuring the safety and stability of the system. Check valves are commonly used in pump stations, drainage systems, water supply systems, and other fields to prevent equipment damage, system failure, or energy waste caused by fluid backflow. The check valve's cut-off function refers to the design and structure of the valve, which can effectively prevent fluid from flowing backward when needed. Check valves usually work automatically and mainly prevent fluid from flowing in the opposite direction to ensure the normal operation of the system. The cut-off mechanism usually relies on certain specific components inside the valve, which can forcibly close the check valve in special circumstances to ensure that fluid does not flow backward.

[0003] In the check valve technology, the commonly used check valve controls the opening and closing of the valve by a spring. However, as the spring is used for a long time, its elasticity will decrease, causing the spring's contraction performance to deteriorate. The decline in spring performance can lead to poor sealing of the valve, resulting in liquid backflow or leakage.

[0004] Therefore, we propose a check valve's cut-off mechanism and check valve. INVENTION CONTENTS

[0005] The utility model mainly solves the technical problem existing in the prior art, and provides a check valve's cut-off mechanism and check valve.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme, a check valve's cut-off mechanism and check valve, including check valve body, the top inner wall of check valve body is equipped with the movable slot, the inner wall of movable slot is movably installed with rotating shaft, the end away from movable slot of rotating shaft is fixedly connected with check plate, the side wall surface of check plate is fixedly connected with connecting rod, the end away from check plate of connecting rod is movably installed with driven wedge, the top of check valve body is fixedly installed with shell, the inside of shell is provided with the compression assembly for compressing check plate, and the compression assembly includes driving wedge, threaded rod, piston and round rod.

[0007] As a preferred technical scheme of the utility model, the inner wall of the check valve body is fixedly installed with an annular baffle on the left side of the check plate, the side of the annular baffle close to the check plate is fixedly connected with a sealing gasket, and the diameter of the check plate is smaller than the inner diameter of the check valve body and larger than the inner diameter of the annular baffle.

[0008] As a preferred technical scheme of the utility model, the top left side wall surface of the driven wedge-shaped block is fixedly connected with a spring, and the other end of the spring is fixedly connected with the check plate.

[0009] As a preferred technical scheme of the utility model, a strip-shaped opening is formed in the top end of the check valve body and the strip-shaped opening is arranged in communication with the shell.

[0010] As a preferred technical scheme of the utility model, lifting sliding grooves are formed in the left and right side inner walls of the shell, sliding blocks are slidably arranged in the two lifting sliding grooves respectively, the opposite ends of the two sliding blocks are fixedly connected to the left and right side wall surfaces of the piston respectively, and the outer wall of the piston is tightly attached to the inner wall of the shell.

[0011] As a preferred technical scheme of the utility model, the bottom end of the threaded rod penetrates through the shell and is rotatably connected to the top end wall surface of the piston, the threaded rod is screw-connected with the check valve body, a rotating hand wheel is fixedly connected to the top end of the threaded rod, a circular rod is fixedly connected to the bottom wall surface of the piston, and the bottom end of the circular rod is fixedly connected to the top end wall surface of the driving wedge-shaped block.

[0012] As a preferred technical scheme of the utility model, the inclined surfaces of the driven wedge-shaped block and the driving wedge-shaped block correspond to each other and the driven wedge-shaped block and the driving wedge-shaped block are in movable abutment.

[0013] The utility model provides a kind of check valve's cut-off mechanism and check valve.

[0014] The utility model provides a kind of check valve's cut-off mechanism and check valve.

[0015] 1, the cut-off mechanism of a kind of check valve and check valve, when using, check valve body is installed in pipeline system, when fluid flows from left pipe, check plate will open due to the pressure of fluid, allow fluid to flow smoothly, if fluid backflow, the pressure of backflow makes check plate tightly press on annular baffle, to realize check function, prevent fluid backflow, when needing cut-off, can be operated by rotating hand wheel, rotating hand wheel is connected with check valve body by thread, drive threaded rod rotation and move downward, the downward movement of threaded rod promotes piston to move downward, to drive circular rod and driving wedge-shaped block move downward together, driving wedge-shaped block contacts with driven wedge-shaped block, and along the surface of driven wedge-shaped block sliding, when the lower end of driving wedge-shaped block contacts the lower end of driven wedge-shaped block, the upper end of driving wedge-shaped block will press the upper end of driven wedge-shaped block, while compressing spring, this action will effectively top tightly check plate, ensure that check plate is stable, to realize cut-off function, this structure design not only can ensure that check plate is automatically opened when normal flow, can also be accurately adjusted by rotating hand wheel when needing cut-off, to achieve the purpose of cut-off. BRIEF DESCRIPTION OF DRAWINGS

[0016] The structure, proportion, size and the like shown in the specification are only used to cooperate with the content disclosed in the specification, so as to be understood and read by those skilled in the art, and do not have technical substantial significance for the implementation of the utility model.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0019] Figure 3 It is a schematic diagram of the internal structure of the utility model;

[0020] Figure 4 It is a schematic diagram of the internal structure of the utility model Figure 2 It is an enlarged view of A in the utility model.

[0021] Legend:

[0022] 10, check valve body; 11, shell; 12, movable groove; 13, rotating shaft; 14, check plate; 15, annular baffle; 16, connecting rod; 17, driven wedge block; 18, spring; 19, driving wedge block; 20, threaded rod; 21, piston; 22, round rod; 23, rotary hand wheel. DETAILED DESCRIPTION

[0023] A check valve and a cut-off mechanism of a check valve, such as Figures 1-4As shown, including check valve body 10, the top inner wall of check valve body 10 is provided with a movable groove 12, the inner wall of movable groove 12 is movably installed with a rotating shaft 13, one end of rotating shaft 13 away from movable groove 12 is fixedly connected with a check plate 14, one side wall of check plate 14 is fixedly connected with a connecting rod 16, one end of connecting rod 16 away from check plate 14 is movably installed with a driven wedge 17, the top end of check valve body 10 is fixedly installed with a shell 11, the inside of shell 11 is provided with a compression assembly for compressing check plate 14, the compression assembly includes a driving wedge 19, a threaded rod 20, a piston 21 and a round rod 22, the inner wall of check valve body 10 is fixedly installed with an annular baffle 15 on the left side of check plate 14, the side of annular baffle 15 close to check plate 14 is fixedly connected with a sealing gasket, the diameter of check plate 14 is smaller than the inner diameter of check valve body 10 and larger than the inner diameter of annular baffle 15, the top left side wall of driven wedge 17 is fixedly connected with a spring 18, the other end of spring 18 is fixedly connected with check plate 14, the top end of check valve body 10 is provided with a strip-shaped port and the strip-shaped port is communicatively arranged with shell 11, the left and right inner walls of shell 11 are provided with lifting sliding grooves, two sliding blocks are respectively slidably arranged in the two lifting sliding grooves, the opposite ends of the two sliding blocks are respectively fixedly connected to the left and right side walls of piston 21, and the outer wall of piston 21 is tightly attached to the inner wall of shell 11, the bottom end of threaded rod 20 penetrates through shell 11 and is rotatably connected to the top end wall of piston 21, and threaded rod 20 is threadedly connected with check valve body 10, the top end of threaded rod 20 is fixedly connected with a rotating hand wheel 23, the top end of round rod 22 is fixedly connected to the bottom wall of piston 21, the bottom end of round rod 22 is fixedly connected to the top end wall of driving wedge 19, the inclined surfaces of driven wedge 17 and driving wedge 19 correspond and driven wedge 17 and driving wedge 19 movably abut.

[0024] The application also proposes a check valve, which includes the above-mentioned check valve flow stopping mechanism, and the specific structure of the check valve flow stopping mechanism is referred to the above-mentioned embodiments. Since the check valve adopts all the technical solutions of the above-mentioned embodiments, it also has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0025] The utility model discloses a working principle: when using, check valve body 10 is installed in the pipeline system, when fluid flows from left pipeline, check plate 14 can open because of the pressure of fluid, and the smooth flow of fluid is allowed, if fluid backflow, the pressure of backflow makes check plate 14 press tightly on annular baffle 15, thereby realizes check function, prevents fluid backflow, when needing to intercept, can operate through rotating hand wheel 23, and rotating hand wheel 23 is connected with check valve body 10 through screw thread, drives screw rod 20 to rotate and moves downward, and the downshift of screw rod 20 promotes piston 21 to go down, thereby drives round bar 22 and driving wedge 19 to move down together, and driving wedge 19 contacts with driven wedge 17, and slides along the surface of driven wedge 17, when the lower end of driving wedge 19 contacts the lower end of driven wedge 17, the upper end of driving wedge 19 will press the upper end of driven wedge 17, and spring 18 is compressed simultaneously, and this action will effectively top check plate 14, and ensure that check plate 14 is stable, and then realizes intercept function, and this structure design not only can ensure that check plate 14 opens automatically when normal flow, but also can be accurately adjusted through rotating hand wheel when needing to intercept, to reach the purpose of intercepting.

[0026] The utility model discloses a working principle: when using, check valve body 10 is installed in the pipeline system, when fluid flows from left pipeline, check plate 14 can open because of the pressure of fluid, and the smooth flow of fluid is allowed, if fluid backflow, the pressure of backflow makes check plate 14 press tightly on annular baffle 15, thereby realizes check function, prevents fluid backflow, when needing to intercept, can operate through rotating hand wheel 23, and rotating hand wheel 23 is connected with check valve body 10 through screw thread, drives screw rod 20 to rotate and moves downward, and the downshift of screw rod 20 promotes piston 21 to go down, thereby drives round bar 22 and driving wedge 19 to move down together, and driving wedge 19 contacts with driven wedge 17, and slides along the surface of driven wedge 17, when the lower end of driving wedge 19 contacts the lower end of driven wedge 17, the upper end of driving wedge 19 will press the upper end of driven wedge 17, and spring 18 is compressed simultaneously, and this action will effectively top check plate 14, and ensure that check plate 14 is stable, and then realizes intercept function, and this structure design not only can ensure that check plate 14 opens automatically when normal flow, but also can be accurately adjusted through rotating hand wheel when needing to intercept, to reach the purpose of intercepting.

[0026] The utility model discloses a working principle: when using, check valve body 10 is installed in the pipeline system, when fluid flows from left pipeline, check plate 14 can open because of the pressure of fluid, and the smooth flow of fluid is allowed, if fluid backflow, the pressure of backflow makes check plate 14 press tightly on annular baffle 15, thereby realizes check function, prevents fluid backflow, when needing to intercept, can operate through rotating hand wheel 23, and rotating hand wheel 23 is connected with check valve body 10 through screw thread, drives screw rod 20 to rotate and moves downward, and the downshift of screw rod 20 promotes piston 21 to go down, thereby drives round bar 22 and driving wedge 19 to move down together, and driving wedge 19 contacts with driven wedge 17, and slides along the surface of driven wedge 17, when the lower end of driving wedge 19 contacts the lower end of driven wedge 17, the upper end of driving wedge 19 will press the upper end of driven wedge 17, and spring 18 is compressed simultaneously, and this action will effectively top check plate 14, and ensure that check plate 14 is stable, and then realizes intercept function, and this structure design not only can ensure that check plate 14 opens automatically when normal flow, but also can be accurately adjusted through rotating hand wheel when needing to intercept, to reach the purpose of intercepting.

Claims

1. A shut-off mechanism for a check valve comprising a check valve body (10) characterised in that: The inner wall of the check valve body (10) is provided with a movable groove (12), the inner wall of the movable groove (12) is movably provided with a rotating shaft (13), one end of the rotating shaft (13) away from the movable groove (12) is fixedly connected with a check plate (14), one side wall of the check plate (14) is fixedly connected with a connecting rod (16), one end of the connecting rod (16) away from the check plate (14) is movably provided with a driven wedge (17), the top end of the check valve body (10) is fixedly provided with a shell (11), the inside of the shell (11) is provided with a compression assembly for compressing the check plate (14), the compression assembly comprises a driving wedge (19), a threaded rod (20), a piston (21) and a round rod (22).

2. A shut-off mechanism for a check valve according to claim 1, wherein: The inner wall of the check valve body (10) is provided with a movable groove (12), the inner wall of the movable groove (12) is movably provided with a rotating shaft (13), one end of the rotating shaft (13) away from the movable groove (12) is fixedly connected with a check plate (14), one side wall of the check plate (14) is fixedly connected with a connecting rod (16), one end of the connecting rod (16) away from the check plate (14) is movably provided with a driven wedge (17), the top end of the check valve body (10) is fixedly provided with a shell (11), the inside of the shell (11) is provided with a compression assembly for compressing the check plate (14), the compression assembly comprises a driving wedge (19), a threaded rod (20), a piston (21) and a round rod (22).

3. A shut-off mechanism for a check valve according to claim 1, wherein: The top left side wall of the driven wedge (17) is fixedly connected with a spring (18), the other end of the spring (18) is fixedly connected with the check plate (14).

4. A shut-off mechanism for a check valve according to claim 1, wherein: The top end of the check valve body (10) is provided with a strip-shaped port, and the strip-shaped port is in communication with the shell (11).

5. A shut-off mechanism for a check valve according to claim 1, wherein: The left and right inner walls of the shell (11) are provided with lifting sliding grooves, two sliding blocks are slidably arranged in the two lifting sliding grooves, respectively, the opposite ends of the two sliding blocks are fixedly connected to the left and right side walls of the piston (21), respectively, and the outer wall of the piston (21) is tightly attached to the inner wall of the shell (11).

6. A shut-off mechanism for a check valve according to claim 1, wherein: The bottom end of the threaded rod (20) penetrates through the shell (11) and is rotatably connected to the top end wall of the piston (21), the threaded rod (20) is threadedly connected with the check valve body (10), the top end of the threaded rod (20) is fixedly connected with a rotating hand wheel (23), the top end of the round rod (22) is fixedly connected to the bottom wall of the piston (21), and the bottom end of the round rod (22) is fixedly connected to the top end wall of the driving wedge (19).

7. A shut-off mechanism for a check valve according to claim 1, wherein: The inclined surfaces of the driven wedge (17) and the driving wedge (19) correspond to each other, and the driven wedge (17) and the driving wedge (19) movably abut.

8. A check valve characterized by A cutoff mechanism comprising a check valve as claimed in any one of claims 1-7.

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