Plug valve

Abstract

The utility model discloses a plug valve, comprising a valve body, a plug body is arranged in the valve body, the valve body is connected with a valve cover through an external hexagonal bolt, an upper packing and a lower packing are arranged on the side of the plug body, a sealing ring is wrapped around the lower packing, a gasket is arranged on the upper side of the sealing ring, a stuffing box located on the side of the upper packing is arranged on one side of the gasket, an internal hexagonal bolt threadedly connected to the valve body is arranged on the upper side of the stuffing box, and a sealing ring is arranged between the plug body and the valve body. The utility model has the advantage of increasing the sealing performance of the plug valve.

Description

Technical Field

[0001] The utility model relates to the field of plug valves, in particular to a plug valve. Background Art

[0002] Valves are control components in fluid delivery systems and have functions such as shutoff, regulation, diversion, backflow prevention, pressure stabilization, diversion or overflow pressure relief. Plug valves are a type of valve, among which manual plug valves are widely used and have the advantages of simple operation and low maintenance cost. Manual plug valves rotate the plug by manually rotating the handle, but the internal sealing of existing plug valves is not very good, so it needs to be improved. Utility Model Content

[0003] The utility model aims to provide a plug valve to solve the problems raised in the above-mentioned background technology, and has the advantage of increasing the sealing performance of the plug valve.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a plug valve, comprising a valve body, a plug body is arranged in the valve body, the valve body is connected to a valve cover by an external hexagonal bolt, an upper stuffing and a lower stuffing are arranged on the side of the plug body, the lower stuffing is wrapped with a sealing ring, a gasket is arranged on the upper side of the sealing ring, a stuffing box located on the side of the upper stuffing is arranged on one side of the gasket, a hexagonal bolt threadedly connected to the valve body is arranged on the upper side of the stuffing box, and a sealing ring is arranged between the plug body and the valve body.

[0005] By adopting the above technical scheme, the upper packing, lower packing, sealing ring, gasket and stuffing box arranged on the side of the plug body are used to seal the plug body, thereby achieving the purpose of increasing the sealing performance of the plug valve, the stuffing box and the valve body are connected by using hexagon socket bolts, the color value of the sealing ring further enhances the sealing performance between the plug body and the valve body, and the valve cover is connected to the valve body by using hexagon socket bolts.

[0006] As a further solution of the utility model: a wrench seat is arranged above the cock body, and the wrench body is penetrated by the wrench seat.

[0007] By adopting the above technical solution, the arrangement of the wrench body facilitates the rotation of the plug body.

[0008] As a further solution of the utility model: one side of the valve cover is integrally connected to a limiting block, and the wrench body is integrally connected to a limiting rod, and when the limiting rod moves to one side of the limiting block, the movement of the wrench body is limited.

[0009] By adopting the above technical solution, the rotation of the wrench body will drive the limit rod to rotate. When the limit rod rotates to the limit block, the limit block limits the rotation of the limit rod and thus limits the movement of the wrench body.

[0010] Preferably, a first nut is provided in the middle of the plug body.

[0011] As a further solution of the utility model: when the limit block abuts against the limit rod, a U-shaped plate is clamped, and the same screw rod is passed through both ends of the U-shaped plate, and the two ends of the screw rod are threadedly connected with second nuts.

[0012] By adopting the above technical solution, when the limit rod does not need to rotate, the U-shaped plate is clamped on the outer side of the limit block and the limit rod from the side, and then the second nut is tightened to allow the U-shaped plate to squeeze the limit block and the limit rod therebetween, thereby temporarily limiting the rotation. The U-shaped plate is elastic and can be deformed.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The upper packing, lower packing, sealing ring, gasket and stuffing box arranged on the side of the plug body are used to seal the plug body, thereby achieving the purpose of increasing the sealing performance of the plug valve. The stuffing box and the valve body are connected by hexagon socket bolts. The color value of the sealing ring further enhances the sealing performance between the plug body and the valve body. The valve cover is connected to the valve body by hexagon socket bolts. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure after removing the U-shaped plate in the embodiment;

[0016] Figure 2 It is a structural schematic diagram of the connection relationship between the U-shaped plate, the limiting block, the limiting rod, the second nut and the screw rod in the embodiment;

[0017] Figure 3 It is a structural schematic diagram of an embodiment.

[0018] In the figure: 1. valve body; 2. external hexagonal bolt; 3. valve cover; 4. first nut; 5. spanner seat; 6. plug body; 7. upper packing; 8. lower packing; 9. internal hexagonal bolt; 10. stuffing box; 11. sealing ring; 12. gasket; 13. sealing ring; 14. spanner body; 15. limit block; 16. limit rod; 17. second nut; 18. U-shaped plate; 19. screw. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In the embodiment of the utility model,

[0021] A plug valve, such as Figure 1-Figure 3 As shown, it includes a valve body 1, in which a plug body 6 is arranged, and the valve body 1 is connected to a valve cover 3 through an external hexagonal bolt 2, and an upper packing 7 and a lower packing 8 are arranged on the side of the plug body 6, and the lower packing 8 is wrapped with a sealing ring 11, and a gasket 12 is arranged on the upper side of the sealing ring 11, and a stuffing box 10 located on the side of the upper packing 7 is arranged on one side of the gasket 12, and a hexagonal bolt 9 threadedly connected to the valve body 1 is arranged on the upper side of the stuffing box 10, and a sealing ring 13 is arranged between the plug body 6 and the valve body 1.

[0022] A wrench seat 5 is disposed above the cock body 6 , and a wrench body 14 is penetrated through the wrench seat 5 .

[0023] One side of the valve cover 3 is integrally connected to a limit block 15 , and the wrench body 14 is integrally connected to a limit rod 16 . When the limit rod 16 moves to one side of the limit block 15 , the movement of the wrench body 14 is limited.

[0024] A first nut 4 is disposed in the middle of the plug body 6 .

[0025] When the limiting block 15 is in contact with the limiting rod 16 , a U-shaped plate 18 is clamped therein. A same screw rod 19 is passed through both ends of the U-shaped plate 18 . Both ends of the screw rod 19 are threadedly connected with second nuts 17 .

[0026] Working principle:

[0027] The upper packing 7, the lower packing 8, the sealing ring 11, the gasket 12 and the stuffing box 10 arranged on the side of the plug body 6 are used to seal the plug body 6, so as to achieve the purpose of increasing the sealing performance of the plug valve. The stuffing box 10 and the valve body 1 are connected by the hexagon socket bolts 9. The color value of the sealing ring 13 further enhances the sealing performance between the plug body 6 and the valve body 1. The valve cover 3 is connected to the valve body 1 by the hexagon socket bolts 2.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A plug valve, comprising a valve body (1), wherein a plug body (6) is arranged in the valve body (1), characterized in that: The valve body (1) is connected to the valve cover (3) via an external hexagonal bolt (2); an upper packing (7) and a lower packing (8) are arranged on the side of the plug body (6); the lower packing (8) is wrapped with a sealing ring (11); a gasket (12) is arranged on the upper side of the sealing ring (11); a stuffing box (10) located on the side of the upper packing (7) is arranged on one side of the gasket (12); a hexagonal bolt (9) threadedly connected to the valve body (1) is arranged on the upper side of the stuffing box (10); a sealing ring (13) is arranged between the plug body (6) and the valve body (1).

2. The plug valve according to claim 1, characterized in that: A wrench seat (5) is arranged above the cock body (6), and a wrench body (14) is penetrated through the wrench seat (5).

3. The plug valve according to claim 2, characterized in that: One side of the valve cover (3) is integrally connected to a limit block (15), and the spanner body (14) is integrally connected to a limit rod (16). When the limit rod (16) moves to one side of the limit block (15), the spanner body (14) is limited from moving.

4. The plug valve according to claim 1, characterized in that: A first nut (4) is provided in the middle of the cock body (6).

5. The plug valve according to claim 3, characterized in that: When the limiting block (15) abuts against the limiting rod (16), a U-shaped plate (18) is clamped, and the two ends of the U-shaped plate (18) are penetrated by a same screw rod (19), and the two ends of the screw rod (19) are threadedly connected with a second nut (17).

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