Multi-stage sealing groove anti-seepage plug valve

Abstract

The utility model discloses a multi-stage sealing groove anti-leakage plug valve which comprises a valve body, a plug cock is arranged in the valve body, a valve cover is arranged at the upper end of the valve body, a sealing cover is arranged at the upper end of the valve cover, a blocking block is arranged at the upper end of the plug cock, a connecting shaft is arranged at the upper end of the blocking block, a connecting hole is formed in the valve cover, a connecting sleeve is arranged in the sealing cover, and a sealing groove is formed in the connecting sleeve. An inner cavity is formed in the connecting sleeve, a threaded block is arranged on the inner wall of the inner cavity, a threaded groove is formed in the upper end of the connecting shaft and is in threaded connection with the inner wall of the inner cavity, a rotating handle is arranged at the upper end of the connecting sleeve, a check block is arranged at the lower end of the plug cock, and a valve seat is arranged in the valve body and located at the lower end of the plug cock. According to the plug valve, the situation that the sealing effect of the plug valve is reduced due to the fact that the plug and the inner wall of the valve body are abraded along with frequent rotation of the plug can be avoided, the service life of the plug valve is prolonged, the plug valve has high sealing performance, and the sealing effect of the plug valve is guaranteed.

Description

A multi-stage sealing groove anti-leakage plug valve Technical Field

[0001] This utility model relates to the field of anti-leakage technology for plug valves, specifically a multi-stage sealing groove anti-leakage plug valve. Background Technology

[0002] A plug valve is a rotary valve with a shut-off element or plunger. It is opened or closed by rotating the plug 90 degrees to connect or separate the passage on the plug from the passage on the valve body. The plug can be cylindrical or conical. In cylindrical plugs, the passage is typically rectangular; while in conical plugs, the passage is trapezoidal. These shapes make plug valves lightweight and compact. Most suitable for use as a medium cut-off and connection, as well as for diversion, but depending on the applicable properties and the erosion resistance of the sealing surface, it can sometimes also be used for throttling. Among them, Chinese Patent No. CN201921602946.X discloses a leak-proof plug valve, specifically relating to the field of plug valve technology, including a valve body, an inlet and an outlet. One end of the valve body is provided with an inlet, and the other end of the valve body is provided with an outlet. The ends of the inlet and outlet are provided with flange end caps. A plug is provided inside the valve body. A plug rod is embedded in the middle position of the upper surface of the valve body. A plug handle is fixedly installed above the plug rod. An auxiliary sealing element is embedded in the valve body. This utility model incorporates an auxiliary sealing element, utilizing the valve ball to achieve a double seal inside the valve body, resulting in a superior sealing effect and preventing internal liquid leakage. Furthermore, the auxiliary sealing element can be closed to facilitate cleaning and maintenance of the stopcock, making operation more convenient for users. Compared to stopcock valves, which are prone to leakage, this design is simple in structure and easy to use.

[0003] Based on the above, the inventors have discovered the following problems: the above-mentioned device can clean and maintain the plug valve, making it convenient for users to operate, but it ignores the fact that during long-term use, the frequent rotation of the plug valve will cause wear between the plug valve and the inner wall of the valve body, thereby reducing the sealing effect of the plug valve. Summary of the Invention

[0004] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage sealing groove anti-leakage plug valve, comprising a valve body, a plug provided inside the valve body, a valve cover provided at the upper end of the valve body, a sealing cover provided at the upper end of the valve cover, a blocking block provided at the upper end of the plug, a connecting shaft provided at the upper end of the blocking block, a connecting hole provided inside the valve cover, a connecting sleeve provided inside the sealing cover, an inner cavity provided inside the connecting sleeve, a threaded block provided on the inner wall of the inner cavity, a threaded groove provided at the upper end of the connecting shaft, the threaded groove being threadedly connected to the inner wall of the inner cavity, a rotating handle provided at the upper end of the connecting sleeve, a stop block provided at the lower end of the plug, a valve seat provided inside the valve body and located at the lower end of the plug, a limiting seat provided inside the valve seat, and a limiting block provided at the upper end of the limiting seat.

[0005] Furthermore, a sealing ring is provided at the joint between the connecting sleeve and the sealing cover, a sealing gasket is provided at the upper end of the plug, and a sealing ring is provided at the upper end of the stop block.

[0006] Furthermore, the side of the plug has a through hole, and the through hole is vertically aligned with the stop block.

[0007] Furthermore, the stop block is semi-disc shaped, the limiting seat is also semi-disc shaped, and the stop block and the limiting seat are symmetrically distributed in the horizontal direction.

[0008] Furthermore, the limiting block is in the shape of a quarter-disc.

[0009] Furthermore, the outer cross-sectional diameter of the plug is equal to the inner diameter of the connecting hole.

[0010] Furthermore, the sealing cap and the valve cover are fixed together by bolts, the valve cover and the valve body are also fixed together by bolts, and the valve body includes a flow hole, the through hole and the flow hole are aligned horizontally.

[0011] Compared with the prior art, the beneficial effects of this utility model are: this multi-stage sealing groove anti-leakage plug valve is reasonable and has the following advantages:

[0012] Through the interaction of components such as the connecting sleeve, threaded groove, and stop, when the plug is opened, it is guided to move upward and rotate. During this process, there is no direct large-area frictional contact between the plug and the inner wall of the valve body, resulting in less wear on the components. This means that the plug valve's components are less prone to damage or leakage, effectively extending the lifespan of the plug valve in long-term use, while also improving the reliability and operating efficiency of the equipment. When the plug valve is closed, as the plug moves downward toward the valve seat, the outer wall of the plug gradually and tightly fits against the inner wall of the valve body, ensuring a sealing effect when the plug valve is closed.

[0013] With the cooperation of the plug, when the connecting shaft moves upward and drives the plug towards the connecting hole, the communication between the valve body and the connecting hole can be cut off, ensuring the sealing performance when the connecting shaft rotates and ensuring the sealing effect of the plug valve. Furthermore, the design of the sealing ring, sealing gasket, and sealing ring effectively improves the sealing effect of the plug valve during operation. Attached Figure Description

[0014] Figure 1 is a schematic diagram of the external three-dimensional structure of this utility model;

[0015] Figure 2 is a schematic diagram of the cross-sectional structure of this utility model;

[0016] Figure 3 is an exploded structural diagram of the present invention as shown in Figure 2;

[0017] Figure 4 is an enlarged structural schematic diagram of point A of this utility model;

[0018] Figure 5 is an enlarged schematic diagram of the internal structure of the valve seat of this utility model.

[0019] In the diagram: 1. Rotary handle; 2. Sealing cap; 3. Plug; 4. Valve cover; 5. Valve body; 6. Connecting sleeve; 7. Connecting shaft; 8. Plug; 9. Through hole; 10. Valve seat; 11. Connecting hole; 12. Flow hole; 14. Inner cavity; 15. Sealing ring; 16. Threaded groove; 17. Sealing gasket; 18. Sealing ring; 19. Stop block; 20. Limit seat; 21. Limit block. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please refer to Figures 1-5, which show one technical solution provided by this utility model.

[0022] Example

[0023] In this embodiment, a multi-stage sealing groove anti-leakage plug valve includes a valve body 5, a plug 8 inside the valve body 5, a valve cover 4 at the upper end of the valve body 5, a sealing cover 2 at the upper end of the valve cover 4, a blocking block 3 at the upper end of the plug 8, a connecting shaft 7 at the upper end of the blocking block 3, a connecting hole 11 inside the valve cover 4, a connecting sleeve 6 inside the sealing cover 2, an inner cavity 14 inside the connecting sleeve 6, a threaded block on the inner wall of the inner cavity 14, a threaded groove 16 at the upper end of the connecting shaft 7, the threaded groove 16 being threadedly connected to the inner wall of the inner cavity 14, a rotating handle 1 at the upper end of the connecting sleeve 6, a stop block 19 at the lower end of the plug 8, a valve seat 10 inside the valve body 5 and located at the lower end of the plug 8, a limiting seat 20 inside the valve seat 10, and a limiting block 21 at the upper end of the limiting seat 20.

[0024] Through the design of the connecting sleeve 6 and the threaded groove 16, rotating the connecting sleeve 6 can drive the connecting shaft 7, the plug 8, and the stop 19 to move vertically on one side of the limiting seat 20. When the stop 19 moves upward to be aligned with the horizontal direction of the limiting block 21, continuing to rotate the connecting sleeve 6 can drive the connecting shaft 7 and the plug 8 to continue rotating, causing the stop 19 to rotate 90 degrees within the valve seat 10. At this time, the connecting shaft 7 and the plug 8 rotate in the same direction, thereby allowing the through hole 9 and the flow hole 12 to be connected horizontally, opening the plug valve. When the connecting sleeve 6 rotates in the opposite direction, with the cooperation of the limiting block 21 and the stop 19, it can drive the stop 19 to rotate in the opposite direction to a position vertically aligned with the initial position. Continuing to rotate the connecting sleeve 6, with the cooperation of the limiting block 21 and the limiting seat 20, it can drive the stop 19, the plug 8, and the connecting shaft 7 to move downward vertically, thereby closing the valve. A plug valve; wherein, since the plug 8 and the inner wall of the valve body 5 have a matching trapezoidal cross-section as shown in Figure 2, when the plug 8 moves upward, the outer wall of the plug 8 gradually releases the tight fit with the inner wall of the valve body 5. When the plug 8 is rotated again, friction will not occur between the plug 8 and the inner wall of the valve body 5, reducing wear between the plug 8 and the inner wall of the valve body 5, thereby improving the service life of the plug valve. When the plug 8 moves downward toward the valve seat 10, the outer wall of the plug 8 gradually fits tightly with the inner wall of the valve body 5, ensuring the sealing effect when the plug valve is closed. When the plug 8 moves upward, it drives the block 3 to move in the same direction. When the block 3 fits with the inner wall of the connecting hole 11, it can ensure the sealing effect of the plug valve when the connecting shaft 7 is rotated. Furthermore, the sealing effect of the plug valve is effectively improved through the design of the sealing ring 15, the sealing gasket 17, and the sealing ring 18.

[0025] The handle 1 allows for easy rotation of the connecting sleeve 6.

[0026] Among them, the connecting sleeve 6 is provided with a sealing ring 15 at the contact point with the sealing cover 2, the upper end of the plug 8 is provided with a sealing gasket 17, and the upper end of the stop block 19 is provided with a sealing ring 18.

[0027] The design of the sealing ring 15 ensures the sealing performance of the plug valve when the connecting sleeve 6 is rotated. The design of the sealing gasket 17 ensures the sealing effect when the plug 8 moves downward, i.e., when the plug 8 cuts off the through-hole 12. The design of the sealing ring 18 cuts off the through-connection between the valve seat 10 and the inner wall of the valve body 5 when the plug 8 moves upward. Combined with the design of the plug block 3, the sealing state inside the valve body 5 is ensured when the plug valve is opened, i.e. when the through hole 9 and the through-hole 12 are connected. This allows the plug valve to maintain a sealed state at all times during operation.

[0028] The plug 8 has a through hole 9 on its side, and the through hole 9 is vertically aligned with the stop block 19.

[0029] The stop block 19 is semi-disc shaped, and the limiting seat 20 is also semi-disc shaped. The stop block 19 and the limiting seat 20 are symmetrically distributed in the horizontal direction.

[0030] The limiting block 21 is in the shape of a quarter-circle disk;

[0031] By cooperating with the limiting seat 20 and the limiting block 21, the movement trajectory of the stop block 19 can be restricted, and the limiting seat 20 and the limiting block 21 are distributed as shown in Figure 5.

[0032] Wherein, the outer cross-sectional diameter of the plug 3 is equal to the inner diameter of the connecting hole 11;

[0033] Since the outer cross-sectional diameter of the plug 3 is equal to the diameter of the connecting hole 11, when the connecting shaft 7 moves upward, as shown in Figure 2, it can drive the plug 3 to move towards the connecting hole 11, thereby cutting off the communication between the valve body 5 and the connecting hole 11, ensuring the sealing performance when the connecting shaft 7 rotates, and thus ensuring the sealing effect of the plug valve.

[0034] The sealing cap 2 is fixed to the valve cover 4 by bolts, and the valve cover 4 is also fixed to the valve body 5 by bolts. The valve body 5 includes a flow hole 12, and the through hole 9 is aligned with the flow hole 12 in the horizontal direction.

[0035] Working principle: Through the design of the connecting sleeve 6 and the threaded groove 16, rotating the connecting sleeve 6 can drive the connecting shaft 7, the plug 8, and the stop 19 to move vertically on one side of the limiting seat 20. When the stop 19 moves upward to be aligned with the horizontal direction of the limiting block 21, continuing to rotate the connecting sleeve 6 can drive the connecting shaft 7 and the plug 8 to continue rotating, causing the stop 19 to rotate 90 degrees within the valve seat 10. At this time, the connecting shaft 7 and the plug 8 rotate in the same direction, thereby allowing the through hole 9 and the flow hole 12 to be connected horizontally, opening the plug valve. When the connecting sleeve 6 rotates in the opposite direction, with the cooperation of the limiting block 21 and the stop 19, it can drive the stop 19 to rotate in the opposite direction to a position vertically aligned with the initial position. Continuing to rotate the connecting sleeve 6, with the cooperation of the limiting block 21 and the limiting seat 20, it can drive the stop 19, the plug 8, and the connecting shaft 7 to move downward vertically. When the plug valve is closed, the outer wall of the plug 8 gradually releases its tight contact with the inner wall of the valve body 5 as the plug 8 moves upward, as shown in Figure 2, the outer wall of the plug 8 gradually releases its tight contact with the inner wall of the valve body 5. This prevents friction between the plug 8 and the inner wall of the valve body 5 when the plug 8 is rotated, reducing wear and extending the service life of the plug valve. When the plug 8 moves downward toward the valve seat 10, its outer wall gradually closes tightly with the inner wall of the valve body 5, ensuring a tight seal when the plug valve is closed. Furthermore, when the plug 8 moves upward, it moves the plug block 3 in the same direction. When the plug block 3 is in contact with the inner wall of the connecting hole 11, it ensures the sealing effect of the plug valve when the connecting shaft 7 is rotated. The design of the sealing ring 15, sealing gasket 17, and sealing ring 18 further enhances the sealing effect of the plug valve.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A multi-stage sealing groove anti-leakage plug valve, comprising a valve body (5), characterized in that: The valve body (5) is provided with a stopcock (8), the valve body (5) is provided with a valve cover (4) at the upper end, the valve cover (4) is provided with a sealing cover (2) at the upper end, the stopcock (8) is provided with a plug (3) at the upper end, the plug (3) is provided with a connecting shaft (7) at the upper end, the valve cover (4) is provided with a connecting hole (11), the sealing cover (2) is provided with a connecting sleeve (6), the connecting sleeve (6) is provided with an inner cavity (14), and the inner wall of the inner cavity (14) is provided with The connecting shaft (7) has a threaded block, and the upper end of the connecting shaft (7) is provided with a threaded groove (16). The threaded groove (16) is threadedly connected to the inner wall of the inner cavity (14). The upper end of the connecting sleeve (6) is provided with a rotating handle (1). The lower end of the plug (8) is provided with a stop block (19). The valve body (5) is provided with a valve seat (10) located at the lower end of the plug (8). The valve seat (10) is provided with a limit seat (20). The upper end of the limit seat (20) is provided with a limit block (21).

2. The multi-stage sealing groove anti-leakage plug valve according to claim 1, characterized in that: The connecting sleeve (6) is fitted with a sealing ring (15) at the sealing cover (2), the upper end of the stop (8) is provided with a sealing gasket (17), and the upper end of the stop block (19) is provided with a sealing ring (18).

3. A multi-level sealed groove leak-proof faucet valve according to claim 2, characterized in that: The plug (8) has a through hole (9) on its side, and the through hole (9) is vertically aligned with the stop block (19).

4. The multi-stage sealing groove anti-leakage plug valve according to claim 3, characterized in that: The stop block (19) is in the shape of a semi-circular disk, and the limiting seat (20) is also in the shape of a semi-circular disk. The stop block (19) and the limiting seat (20) are symmetrically distributed in the horizontal direction.

5. A multi-level sealed groove leak-proof faucet valve according to claim 4, characterized in that: The limiting block (21) is in the shape of a quarter-circle disk.

6. A multi-level sealed groove leak-proof faucet valve according to claim 5, characterized in that: The outer cross-sectional diameter of the plug (3) is equal to the inner diameter of the connecting hole (11).

7. A multi-stage sealing groove anti-leakage plug valve according to claim 6, characterized in that: The sealing cap (2) and the valve cap (4) are fixed by bolts, and the valve cap (4) and the valve body (5) are also fixed by bolts. The valve body (5) includes a flow hole (12), and the through hole (9) and the flow hole (12) are aligned in the horizontal direction.

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