CN223782084U - A flow-stopping mechanism for a check valve and the check valve itself. - Google Patents

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, which comprise a check valve body, wherein the inner wall of the top of the check valve body is provided with a movable groove, the inner wall of the movable groove is movably provided with a rotating shaft, one end fixedly connected with check plate of movable groove is kept away from to the axis of rotation, and a side wall fixedly connected with connecting rod of check plate, the one end movable mounting that the connecting rod kept away from the check plate has driven wedge. According to the utility model, the hand wheel is rotated to drive 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 block are driven to move downwards together, the driving wedge block is contacted with the driven wedge block and slides along the surface of the driven wedge block, when the lower end of the driving wedge block is contacted with the lower end of the driven wedge block, the upper end of the driving wedge block presses the upper end of the driven wedge block, meanwhile, the spring is compressed, the check plate is effectively propped up, the stability of the check plate is ensured, and the intercepting function is realized.

Description

Shutoff mechanism of check valve and check valve

Technical Field

The utility model relates to the technical field of check valves, in particular to a shutoff mechanism of a check valve and the check valve.

Background

A check valve is a valve device for preventing the backflow of fluid in a pipe. Its main function is to automatically close the valve when the flow direction of the fluid in the pipeline changes, prevent the fluid from flowing back, and ensure the safety and stability of the system. The check valve is generally applied to the fields of pump stations, drainage systems, water supply systems and the like, and can prevent equipment damage, system faults or energy waste caused by fluid backflow. The shutoff function of the check valve is to effectively prevent the backflow of fluid when needed by the design and structure of the valve. The check valve is usually automatic and mainly used for preventing the reverse flow of fluid and ensuring the normal operation of the system. The shut-off mechanism typically relies on certain specific components within the valve, in special cases by forcibly closing the check valve, to ensure that the fluid does not flow back.

In the check valve technology, the check valve commonly used controls the opening and closing of the valve through a spring, however, as the spring is used for a long time, the elasticity of the check valve is reduced, so that the shrinkage performance of the spring is poor, the valve is not tightly closed due to the decline of the spring performance, and the tightness of the check valve is poor, so that liquid backflow or leakage is caused.

For this purpose, we propose a shutoff mechanism of a check valve and a check valve.

Disclosure of utility model

The utility model mainly solves the technical problems in the prior art and provides a shutoff mechanism of a check valve and the check valve.

In order to achieve the above purpose, the utility model adopts the following technical scheme that the shutoff mechanism of the check valve and the check valve comprise a check valve body, wherein a movable groove is formed in the inner wall of the top of the check valve body, a rotating shaft is movably arranged on the inner wall of the movable groove, one end of the rotating shaft, which is far away from the movable groove, is fixedly connected with a check plate, a connecting rod is fixedly connected with one side wall surface of the check plate, one end of the connecting rod, which is far away from the check plate, is movably provided with a driven wedge block, the top end of the check valve body is fixedly provided with a shell, a compressing assembly for compressing the check plate is arranged in the shell, and the compressing assembly comprises a driving wedge block, a threaded rod, a piston and a round rod.

As a preferable technical scheme of the utility model, the inner wall of the check valve body is fixedly provided with the annular baffle plate at the left side of the check plate, one side of the annular baffle plate, which is close to the check plate, is fixedly connected with the 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 plate.

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

As a preferable technical scheme of the utility model, the top end of the check valve body is provided with a strip-shaped opening which is communicated with the shell.

As a preferable technical scheme of the utility model, lifting sliding grooves are formed in the inner walls of the left side and the right side of the shell, sliding blocks are respectively arranged in the two lifting sliding grooves in a sliding manner, one ends of the two sliding blocks, which are opposite, are respectively fixedly connected to the left side wall surface and the right side wall surface of the piston, and the outer wall of the piston is tightly attached to the inner wall of the shell.

As a preferable technical scheme of the utility model, the bottom end of the threaded rod penetrates through the shell and is rotationally connected to the top end wall surface of the piston, the threaded rod is in threaded connection with the check valve body, the top end of the threaded rod is fixedly connected with a rotary hand wheel, the top end of the round rod is fixedly connected to the bottom wall surface of the piston, and the bottom end of the round rod is fixedly connected to the top end wall surface of the driving wedge block.

As a preferable technical scheme of the utility model, the inclined planes of the driven wedge block and the driving wedge block correspond to each other, and the driven wedge block and the driving wedge block are movably abutted.

The check valve comprises the shutoff mechanism of the check valve.

The utility model provides a shutoff mechanism of a check valve and the check valve. The beneficial effects are as follows:

1. This stop mechanism and check valve of check valve, when using, the check valve body is installed in pipe system, when fluid flows from left side pipeline, the check plate can be opened because of fluidic pressure, allow smooth flow of fluid, if fluid takes place backward flow, the pressure of backward flow makes the check plate sticis on annular baffle, thereby realize the non return function, prevent that fluid from flowing backwards, when needs are stopped, can operate through rotatory hand wheel, rotatory hand wheel passes through screw thread and check valve body coupling, drive the threaded rod rotatory and the downwardly moving, the downwardly moving of threaded rod promotes the piston downwardly, thereby drive round bar and initiative wedge together downwardly moving, initiative wedge contacts with driven wedge, and slide along the surface of driven wedge, when the lower extreme of initiative wedge contacts the lower extreme of driven wedge, the upper end of initiative wedge will be oppressed, simultaneously compression spring, this action will be effectively with the check plate top tightly, ensure that the check plate is stable, and then realize the function, this kind of structural design can not only ensure that the check plate is automatic opening when normal flow, also can be adjusted through rotatory when needs, thereby the purpose that stops can reach the regulation simultaneously.

Drawings

The structures, proportions, sizes, etc. shown in this description are for illustration purposes only and are not intended to limit the scope of the utility model, which is otherwise, used by those skilled in the art to which this utility model pertains.

FIG. 1 is a schematic diagram of the overall structure of the utility model;

FIG. 2 is a schematic diagram of the internal structure of the utility model;

FIG. 3 is a schematic diagram of the internal structure of the utility model;

Fig. 4 is an enlarged view of utility model at a in fig. 2.

Legend description:

10. The check valve comprises a check valve body, 11, a shell, 12, a movable groove, 13, a rotating shaft, 14, a check plate, 15, an annular baffle plate, 16, a connecting rod, 17, a driven wedge block, 18, a spring, 19, a driving wedge block, 20, a threaded rod, 21, a piston, 22, a round rod, 23 and a rotating hand wheel.

Detailed Description

The utility model provides a shutoff mechanism and check valve of check valve, as shown in fig. 1-4, including check valve body 10, movable groove 12 has been seted up to the top inner wall of check valve body 10, movable groove 12's inner wall movable mounting has axis of rotation 13, the one end fixedly connected with check plate 14 of movable groove 12 is kept away from to axis of rotation 13, a side wall fixedly connected with connecting rod 16 of check plate 14, one end movable mounting that the connecting rod 16 kept away from check plate 14 has driven wedge 17, the top fixed mounting of check valve body 10 has casing 11, the inside of casing 11 is provided with the hold-down subassembly that is used for compressing tightly check plate 14, the hold-down subassembly includes initiative wedge 19, threaded rod 20, piston 21 and round bar 22, the inner wall of check valve body 10 is located the left side fixed mounting annular baffle 15 of check plate 14, one side fixedly connected with sealing pad that annular baffle 15 is close to check plate 14, the diameter of the check plate 14 is smaller than the inner diameter of the check valve body 10 and larger than the inner diameter of the annular baffle 15, a spring 18 is fixedly connected to the left side wall surface of the top of the driven wedge block 17, the other end of the spring 18 is fixedly connected with the check plate 14, a strip-shaped opening is formed in the top end of the check valve body 10 and is communicated with the shell 11, lifting sliding grooves are formed in the inner walls of the left side and the right side of the shell 11, sliding blocks are respectively arranged in the two lifting sliding grooves in a sliding manner, one ends of the two sliding blocks, which are opposite, are respectively fixedly connected to the left side wall surface and the right side wall surface of the piston 21, the outer wall of the piston 21 is tightly attached to the inner wall of the shell 11, the bottom end of the threaded rod 20 penetrates through the shell 11 and is rotatably connected to the top end wall surface of the piston 21, the threaded rod 20 is in threaded connection with the check valve body 10, the top end of the threaded rod 20 is fixedly connected with a rotary hand wheel 23, the top end of the round rod 22 is fixedly connected to the bottom wall surface of the piston 21, the bottom of the round rod 22 is fixedly connected to the top end wall surface of the driving wedge block 19, the inclined surfaces of the driven wedge block 17 and the driving wedge block 19 correspond to each other, and the driven wedge block 17 and the driving wedge block 19 are movably abutted.

The application also provides a check valve, which comprises the shutoff mechanism of the check valve, and the specific structure of the shutoff mechanism of the check valve refers to the embodiment, and as the check valve adopts all the technical schemes of all the embodiments, the check valve also has all the beneficial effects brought by the technical schemes of the embodiments, and the detailed description is omitted.

The check valve body 10 is arranged in a pipeline system in use, when fluid flows out from a left pipeline, the check plate 14 is opened due to the pressure of the fluid, the fluid is allowed to smoothly flow, if the fluid flows back, the back pressure enables the check plate 14 to be tightly pressed on the annular baffle 15, so that the check function is realized, the fluid is prevented from flowing back, when the shut-off is required, the check plate 14 can be operated by rotating the hand wheel 23, the rotating hand wheel 23 is connected with the check valve body 10 through threads, the threaded rod 20 is driven to rotate and move downwards, the piston 21 is pushed downwards by the downward movement of the threaded rod 20, the round rod 22 and the driving wedge 19 are driven to move downwards together, the driving wedge 19 is contacted with the driven wedge 17 and slides along the surface of the driven wedge 17, when the lower end of the driving wedge 19 is contacted with the lower end of the driven wedge 17, the upper end of the driving wedge 19 is pressed against the driven wedge 17, meanwhile, the spring 18 is compressed, the check plate 14 is effectively pressed against the check plate 14, the stability is ensured, and the function is realized.

The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims.

Claims (8)

1. A shutoff mechanism of a check valve comprises a check valve body (10) and is characterized in that a movable groove (12) is formed in the inner wall of the top of the check valve body (10), a rotating shaft (13) is movably mounted on the inner wall of the movable groove (12), one end, far away from the movable groove (12), of the rotating shaft (13) is fixedly connected with a check plate (14), a connecting rod (16) is fixedly connected with one side wall surface of the check plate (14), one end, far away from the check plate (14), of the connecting rod (16) is movably mounted with a driven wedge block (17), a shell (11) is fixedly mounted at the top end of the check valve body (10), a compression assembly used for compressing the check plate (14) is arranged in the shell (11), and the compression assembly comprises a driving wedge block (19), a threaded rod (20), a piston (21) and a round rod (22).

2. The shutoff mechanism of a check valve according to claim 1, wherein the inner wall of the check valve body (10) is fixedly provided with an annular baffle plate (15) on the left side of the check plate (14), one side of the annular baffle plate (15) close to the check plate (14) is fixedly connected with a sealing gasket, and the diameter of the check plate (14) is smaller than the inner diameter of the check valve body (10) and larger than the inner diameter of the annular baffle plate (15).

3. A shutoff mechanism of a check valve according to claim 1, wherein a spring (18) is fixedly connected to the left side wall surface of the top of the driven wedge block (17), and the other end of the spring (18) is fixedly connected with the check plate (14).

4. A shutoff mechanism of a check valve as set forth in claim 1, wherein a strip-shaped opening is provided at the top end of the check valve body (10) and is communicated with the housing (11).

5. The shutoff mechanism of the check valve of claim 1, wherein lifting sliding grooves are formed in the inner walls of the left side and the right side of the shell (11), sliding blocks are respectively arranged in the two lifting sliding grooves in a sliding mode, one ends, opposite to the two sliding blocks, of the two sliding blocks are respectively fixedly connected to the wall surfaces of the left side and the right side of the piston (21), and the outer wall of the piston (21) is tightly attached to the inner wall of the shell (11).

6. The shutoff mechanism of the check valve of claim 1, wherein the bottom end of the threaded rod (20) penetrates through the shell (11) to be rotationally connected to the top end wall surface of the piston (21), the threaded rod (20) is in threaded connection with the check valve body (10), the top end of the threaded rod (20) is fixedly connected with a rotary hand wheel (23), the top end of the round rod (22) is fixedly connected to the bottom wall surface of the piston (21), and the bottom end of the round rod (22) is fixedly connected to the top end wall surface of the driving wedge block (19).

7. A shutoff mechanism of a check valve according to claim 1, wherein the inclined surfaces of the driven wedge block (17) and the driving wedge block (19) correspond to each other, and the driven wedge block (17) and the driving wedge block (19) are movably abutted.

8. A check valve comprising a shutoff mechanism of the check valve as claimed in any one of claims 1 to 7.