Dual-seal stop valve

Abstract

The utility model relates to the technical field of stop valves, in particular to a dual-seal stop valve which is characterized in that a screw is fixedly connected to the upper inner wall of a rotary cover, a threaded sleeve is in threaded connection with the outer surface of the screw, a lifting seat is fixedly connected to the lower surface of the threaded sleeve, and a telescopic air cylinder is rotationally connected to the lower surface of the screw; a handle is fixedly connected to the outer surface of the rotating cover, a spring is fixedly connected to the upper inner wall of the handle, an adjusting handle is fixedly connected to the end, away from the handle, of the spring, and a limiting frame is fixedly connected to the left end of the adjusting handle. According to the stop valve, the safety risk caused by abnormal conditions such as faults of the driving part is reduced, the use scene of the stop valve is expanded, the actual application value of the stop valve is enhanced, the position of the handle can be limited in the static state, closing or opening of the stop valve caused by mistaken touch of the handle is avoided, and the safety effect of the stop valve is improved.

Description

A double-sealed shut-off valve Technical Field

[0001] This utility model relates to the field of shut-off valve technology, and in particular to a double-sealed shut-off valve. Background Technology

[0002] A shut-off valve is an automated valve used to quickly cut off fluid flow in emergency situations. Its core function is to quickly cut off the medium passage based on the synergistic action of the drive mechanism and valve body structure when abnormal conditions such as leakage, fire, or overpressure occur in the system, so as to prevent the accident from escalating and ensure personnel safety and equipment stability.

[0003] After searching, it was found that the utility model application with application number CN202121305432.5 provides a shut-off valve, which includes a valve body, a valve core and a driving component. The driving component is installed at the upper end of the valve body and is connected to the valve stem for transmission. The valve core is moved by the driving component to achieve sealing and opening of multiple chambers of the valve body. It has a simple structure and multiple functions.

[0004] However, since it is entirely driven by a drive unit during use, the adjustment method for closing and opening the shut-off valve is singular. When an emergency occurs and the shut-off valve needs to be closed, if the drive unit is damaged or there is an external power outage, the drive unit will not be able to work properly and will not be able to close the shut-off valve, which can easily cause safety hazards and property damage. Summary of the Invention

[0005] The purpose of this utility model is to provide a double-sealed shut-off valve, which solves the problem of the shut-off valve having only one closing method, making it easier to manually close the shut-off valve in emergency situations, increasing the applicable scenarios of the shut-off valve, and thus improving the practicality of the shut-off valve.

[0006] To achieve the above objectives, this utility model provides a double-sealed shut-off valve, comprising: a valve body, connecting parts provided on both sides of the valve body, a sealing sleeve fixedly connected to the upper surface of the valve body, and a sealing assembly provided inside the sealing sleeve;

[0007] It also includes a rotating cover; a screw is fixedly connected to the upper inner wall of the rotating cover, a threaded sleeve is threadedly connected to the outer surface of the screw, a lifting seat is fixedly connected to the lower surface of the threaded sleeve, a telescopic cylinder is rotatably connected to the lower surface of the screw, a handle is fixedly connected to the outer surface of the rotating cover, a spring is fixedly connected to the upper inner wall of the handle, an adjusting handle is fixedly connected to the end of the spring away from the handle, a limit frame is fixedly connected to the left end of the adjusting handle, and a locking block is provided on the bottom side wall of the limit frame.

[0008] The sealing assembly includes a first sealing seat, a sealing plate, a second sealing seat, a first sealing gasket, a second sealing gasket, and a third sealing gasket. The lower surface of the first sealing seat is fixedly connected to the sealing plate, the lower surface of the sealing plate is fixedly connected to the second sealing seat, the lower inner wall of the sealing sleeve is fixedly connected to the second sealing gasket, the bottom inner wall of the valve body is fixedly connected to the first sealing gasket, and both sides of the sealing plate are fixedly connected to the third sealing gasket. This facilitates sealing of the valve body through multiple layers of compatible sealing elements, thereby improving the sealing effect of the valve body.

[0009] The inner surface of the sealing sleeve is slidably connected to the first sealing seat, the upper surface of the first sealing seat is fixedly connected to the telescopic cylinder, and the outer surface of the second sealing seat slides against the valve body. This allows the first sealing seat to be moved by the telescopic cylinder during normal use, thereby moving the entire sealing assembly to achieve the closing and opening of the valve body.

[0010] The outer surface of the third sealing gasket abuts against the valve body, the lower surface of the second sealing seat abuts against the first sealing gasket, and the lower surface of the first sealing seat abuts against the second sealing gasket, which facilitates the improvement of the sealing effect through the sealing gasket.

[0011] The outer surfaces of the first sealing seat and the lifting seat are both fixedly connected with guide blocks. The outer surface of the guide blocks is slidably connected to the sealing sleeve, and the outer surface of the lifting seat is slidably connected to the sealing sleeve. This facilitates the guidance of the movement of the lifting seat and the first sealing seat, improves the stability of the lifting seat and the first sealing seat when they move, and prevents the lifting seat and the first sealing seat from rotating with the screw.

[0012] The outer surface of the sealing sleeve is provided with a groove, and the inner surface of the groove engages with the locking block, so as to limit the position of the limiting frame by the interaction force between the locking block and the groove, and prevent external factors from accidentally touching the handle and causing the rotating cover to rotate.

[0013] The top of the limiting frame is rotatably connected to the handle, and the inner surface of the rotating cover is rotatably connected to the sealing sleeve. This allows the limiting frame to be rotated by adjusting the handle, causing the locking block to disengage from the locking slot and removing the restriction on the limiting frame. This makes it easier to rotate the rotating cover by the handle, which in turn moves the lifting seat under the interaction of the screw and the threaded sleeve, thereby moving the first sealing seat and enabling manual adjustment of the valve body's opening and closing.

[0014] The outer surface of the lifting seat is slidably connected to the sealing sleeve, which facilitates the movement of the lifting seat.

[0015] This utility model discloses a double-sealed shut-off valve. By adding a manual closing function, the shut-off valve can be quickly closed manually in emergency situations without relying on a drive component. This improves the shut-off valve's responsiveness in sudden situations, reduces safety risks caused by abnormal situations such as drive component failure or external power outages, expands the application scenarios of the shut-off valve, enhances its practical application value, and can restrict the position of the handle in a static state to prevent accidental contact with the handle from causing the shut-off valve to close or open, thus increasing the safety of the shut-off valve. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0017] Figure 1 is an overall structural diagram of this utility model.

[0018] Figure 2 is a cross-sectional view of this utility model.

[0019] Figure 3 is an enlarged view of point A in Figure 2.

[0020] Figure 4 is a partial exploded view of the structure of this utility model.

[0021] In the diagram: 1. Valve body; 2. Connector; 3. Sealing sleeve; 4. First sealing seat; 5. Sealing plate; 6. Second sealing seat; 7. First sealing gasket; 8. Second sealing gasket; 9. Third sealing gasket; 10. Rotating cover; 11. Screw; 12. Threaded sleeve; 13. Lifting seat; 14. Telescopic cylinder; 15. Handle; 16. Spring; 17. Adjusting handle; 18. Limiting bracket; 19. Locking block; 20. Locking groove; 21. Guide block. Detailed Implementation

[0022] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0023] The first embodiment of this application is as follows:

[0024] Please refer to Figures 1-4. The double-sealed shut-off valve of this embodiment includes: a valve body 1, connecting parts 2 are provided on both sides of the valve body 1, a sealing sleeve 3 is fixedly connected to the upper surface of the valve body 1, and a sealing component is provided inside the sealing sleeve 3.

[0025] It also includes a rotating cover 10; the inner surface of the rotating cover 10 is rotatably connected to the sealing sleeve 3, a screw 11 is fixedly connected to the upper inner wall of the rotating cover 10, a threaded sleeve 12 is threadedly connected to the outer surface of the screw 11, a lifting seat 13 is fixedly connected to the lower surface of the threaded sleeve 12, a telescopic cylinder 14 is rotatably connected to the lower surface of the screw 11, a handle 15 is fixedly connected to the outer surface of the rotating cover 10, a spring 16 is fixedly connected to the upper inner wall of the handle 15, the spring 16 can ensure that the locking block 19 is always connected to the locking groove 20 without external interference to limit the position of the limiting frame 18, an adjusting handle 17 is fixedly connected to the end of the spring 16 away from the handle 15, the left end of the adjusting handle 17 is fixedly connected to the limiting frame 18, the top of the limiting frame 18 is rotatably connected to the handle 15, a locking block 19 is provided on the bottom side wall of the limiting frame 18, a locking groove 20 is provided on the outer surface of the sealing sleeve 3, and the inner surface of the locking groove 20 engages with the locking block 19.

[0026] When the telescopic cylinder 14 malfunctions and cannot adjust the sealing assembly, hold the adjustment handle 17 and the handle 15. The adjustment handle 17 drives the limit frame 18 to rotate, causing the locking block 19 to disengage from the locking groove 20, thereby removing the restriction on the limit frame 18. The handle 15 rotates the rotating cover 10, which drives the screw 11 to rotate. The rotation of the screw 11 drives the threaded sleeve 12 to move downward, thereby driving the lifting seat 13 to move downward, and then driving the first sealing seat 4 to move downward, thus achieving the sealing of the valve body 1 by the entire sealing assembly.

[0027] The sealing assembly includes a first sealing seat 4, a sealing plate 5, a second sealing seat 6, a first sealing gasket 7, a second sealing gasket 8, and a third sealing gasket 9. The lower surface of the first sealing seat 4 is fixedly connected to the sealing plate 5, the lower surface of the sealing plate 5 is fixedly connected to the second sealing seat 6, the lower inner wall of the sealing sleeve 3 is fixedly connected to the second sealing gasket 8, the bottom inner wall of the valve body 1 is fixedly connected to the first sealing gasket 7, the two sides of the sealing plate 5 are fixedly connected to the third sealing gasket 9, the inner surface of the sealing sleeve 3 is slidably connected to the first sealing seat 4, the upper surface of the first sealing seat 4 is fixedly connected to the telescopic cylinder 14, the outer surface of the second sealing seat 6 slides against the valve body 1, the outer surface of the third sealing gasket 9 abuts against the valve body 1, the lower surface of the second sealing seat 6 abuts against the first sealing gasket 7, the lower surface of the first sealing seat 4 abuts against the second sealing gasket 8, and guide blocks 21 are fixedly connected to the outer surfaces of the first sealing seat 4 and the lifting seat 13. The outer surface of the guide blocks 21 is slidably connected to the sealing sleeve 3, and the outer surface of the lifting seat 13 is slidably connected to the sealing sleeve 3.

[0028] During normal use, the telescopic cylinder 14 drives the first sealing seat 4 to move, thereby moving the sealing assembly to close and open the valve body 1. The valve body 1 is sealed by the tight contact between the first sealing seat 4 and the second sealing gasket 8, the second sealing seat 6 and the first sealing gasket 7, and the third sealing gasket 9 and the valve body 1. The two arc-shaped sealing plates 5 are designed to improve the sealing effect of the valve body 1. At the same time, the arc-shaped sealing plates 5 can disperse the pressure of the fluid on the sealing plates 5 and improve the stress resistance of the sealing plates 5.

[0029] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A double-sealed shut-off valve, comprising: A valve body, characterized in that: connecting parts are provided on both sides of the valve body, a sealing sleeve is fixedly connected to the upper surface of the valve body, and a sealing assembly is provided inside the sealing sleeve; it also includes a rotating cover; a screw is fixedly connected to the upper inner wall of the rotating cover, a threaded sleeve is threadedly connected to the outer surface of the screw, a lifting seat is fixedly connected to the lower surface of the threaded sleeve, a telescopic cylinder is rotatably connected to the lower surface of the screw, a handle is fixedly connected to the outer surface of the rotating cover, a spring is fixedly connected to the upper inner wall of the handle, an adjusting handle is fixedly connected to the end of the spring away from the handle, a limit frame is fixedly connected to the left end of the adjusting handle, and a locking block is provided on the bottom side wall of the limit frame.

2. The double-sealed shut-off valve as described in claim 1, characterized in that: The sealing assembly includes a first sealing seat, a sealing plate, a second sealing seat, a first sealing gasket, a second sealing gasket, and a third sealing gasket. The lower surface of the first sealing seat is fixedly connected to the sealing plate, the lower surface of the sealing plate is fixedly connected to the second sealing seat, the lower inner wall of the sealing sleeve is fixedly connected to the second sealing gasket, the bottom inner wall of the valve body is fixedly connected to the first sealing gasket, and both sides of the sealing plate are fixedly connected to the third sealing gasket.

3. The double-sealed shut-off valve as described in claim 2, characterized in that: The inner surface of the sealing sleeve is slidably connected to the first sealing seat, the upper surface of the first sealing seat is fixedly connected to the telescopic cylinder, and the outer surface of the second sealing seat is slidably connected to the valve body.

4. A double-sealed shut-off valve as described in claim 2, characterized in that: The outer surface of the third sealing gasket abuts against the valve body, the lower surface of the second sealing seat abuts against the first sealing gasket, and the lower surface of the first sealing seat abuts against the second sealing gasket.

5. A double-sealed shut-off valve as described in claim 2, characterized in that: Guide blocks are fixedly connected to the outer surfaces of the first sealing seat and the lifting seat, and the outer surfaces of the guide blocks are slidably connected to the sealing sleeve.

6. A double-sealed shut-off valve as described in claim 1, characterized in that: The outer surface of the sealing sleeve is provided with a groove, and the inner surface of the groove engages with the locking block.

7. A double-sealed shut-off valve as described in claim 1, characterized in that: The top of the limiting frame is rotatably connected to the handle, and the inner surface of the rotating cover is rotatably connected to the sealing sleeve.

8. A double-sealed shut-off valve as described in claim 1, characterized in that: The outer surface of the lifting seat is slidably connected to the sealing sleeve.

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