Ball valve

Abstract

The utility model discloses a ball valve which comprises a valve body, a valve rod is arranged above the valve body, the valve body comprises an O-shaped ring located in the circumferential direction of the valve rod, a conical sealing ring located above the O-shaped ring is arranged in the circumferential direction of the valve rod, a conical sealing seat is arranged above the conical sealing ring, and the conical sealing seat is connected with the O-shaped ring. A disc spring is installed above the conical sealing seat, a pressing sleeve is arranged above the disc spring, padding is arranged on one side of the pressing sleeve and one side of the conical sealing seat, and iron pads are arranged between the padding and the pressing sleeve and between the padding and the conical sealing seat. The utility model has the advantage of preventing the filler from losing efficacy due to the extrusion of the filler by the pressure of the middle cavity.

Description

Technical Field

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

[0002] The existing ball valve is composed of a valve body, a bypass cover, a ball, a valve stem, a gland nut, a wrench, a sealing ring and a packing ring. The valve is opened or closed by operating the ball to rotate around the center line of the valve body through the valve stem.

[0003] At present, the filler is easily failed under the pressure extrusion of the middle cavity, so it needs to be improved. Utility Model Content

[0004] The utility model aims to provide a ball valve to solve the problems raised in the above background technology, which has the advantage of preventing the packing from being squeezed and rendered ineffective due to the pressure in the middle cavity.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a ball valve, comprising a valve body, a valve stem is arranged above the valve body, the valve body comprises an O-ring located in the circumference of the valve stem, a conical sealing ring located above the O-ring is arranged in the circumference of the valve stem, a conical sealing seat is arranged above the conical sealing ring, a disc spring is installed above the conical sealing seat, a compression sleeve is arranged above the disc spring, packing is arranged on one side of the compression sleeve and the conical sealing seat, and an iron gasket is arranged between the packing, the compression sleeve and the conical sealing seat.

[0006] By adopting the above technical solution, the iron gasket arranged between the packing and the compression sleeve and the conical sealing seat can prevent the packing from failing easily under the pressure extrusion of the middle cavity. The arrangement of the O-ring and the conical sealing ring increases the overall sealing performance. The conical sealing seat squeezes the conical sealing ring below to deform it and thus increase the sealing performance. The arrangement of the compression sleeve and the disc spring squeezes the conical sealing seat below to increase the overall sealing performance.

[0007] Preferably, the top of the valve stem is connected to a handle, the upper part of the valve stem is threadedly connected to a first nut on one side of the handle, the valve stem is provided with a locking plate on one side of the handle, and the valve stem is threadedly connected to a first nut on one side of the gasket.

[0008] Preferably, a pressure plate is installed above the filler.

[0009] Preferably, the valve body is connected to a sub-body located on one side of the valve body by bolts, and the lower end of the valve stem is connected to a ball.

[0010] Preferably, valve seats are installed on the inner sides of the valve body and the auxiliary body, and the ball is located in the valve seat.

[0011] As a further solution of the utility model: a plurality of ladder-shaped blocks are integrally connected to one side of the valve seat, and the valve body is provided with a ladder-shaped groove for accommodating the ladder-shaped blocks.

[0012] By adopting the above technical solution, the arrangement of the ladder-shaped block and the ladder-shaped groove increases the connection strength between the valve seat and the valve body.

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

[0014] The iron gasket arranged between the packing, the compression sleeve and the conical sealing seat can prevent the packing from failing easily under the pressure of the middle cavity. The arrangement of the O-ring and the conical sealing ring increases the overall sealing performance. The conical sealing seat squeezes the conical sealing ring below to deform it and thus increase the sealing performance. The arrangement of the compression sleeve and the disc spring squeezes the conical sealing seat below to increase the overall sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an embodiment.

[0016] In the figure: 1. valve body; 2. ball; 3. bolt; 4. nut; 5. sub-body; 6. valve seat; 7. packing; 8. O-ring; 9. conical sealing ring; 10. conical sealing seat; 11. disc spring; 12. pressing sleeve; 13. pressing plate; 14. iron washer; 15. ladder block; 16. locking plate; 17. handle; 18. ladder groove; 19. valve stem. DETAILED DESCRIPTION

[0017] 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.

[0018] In the embodiment of the utility model,

[0019] A ball valve, such as Figure 1 As shown, it includes a valve body 1, a valve stem 19 is arranged above the valve body 1, the valve body 1 includes an O-ring 8 located in the circumference of the valve stem 19, a conical sealing ring 9 is arranged in the circumference of the valve stem 19 and located above the O-ring 8, a conical sealing seat 10 is arranged above the conical sealing ring 9, a disc spring 11 is installed above the conical sealing seat 10, a pressing sleeve 12 is arranged above the disc spring 11, a packing 7 is arranged on one side of the pressing sleeve 12 and the conical sealing seat 10, and an iron gasket 14 is arranged between the packing 7, the pressing sleeve 12 and the conical sealing seat 10.

[0020] The top of the valve stem 19 is connected to a handle 17, the upper part of the valve stem 19 is threadedly connected to a first nut 4 on one side of the handle 17, the valve stem 19 is provided with a locking plate 16 on one side of the handle 17, and the valve stem 19 is threadedly connected to a first nut 4 on one side of the gasket.

[0021] A pressure plate 13 is installed above the filler 7 .

[0022] The valve body 1 is connected to a sub-body 5 located at one side of the valve body 1 through a bolt 3 , and the lower end of the valve stem 19 is connected to a ball 2 .

[0023] A valve seat 6 is installed on the inner side of the valve body 1 and the auxiliary body 5 , and the ball 2 is located in the valve seat 6 .

[0024] A plurality of ladder blocks 15 are integrally connected to one side of the valve seat 6 , and the valve body 1 is provided with a ladder groove 18 for accommodating the ladder blocks 15 .

[0025] 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 ball valve, comprising a valve body (1), characterized in that: A valve stem (19) is arranged above the valve body (1), and the valve body (1) includes an O-ring (8) located in the circumference of the valve stem (19), and a conical sealing ring (9) is arranged in the circumference of the valve stem (19) and located above the O-ring (8), and a conical sealing seat (10) is arranged above the conical sealing ring (9), and a disc spring (11) is installed above the conical sealing seat (10), and a pressing sleeve (12) is arranged above the disc spring (11), and a packing (7) is arranged on one side of the pressing sleeve (12) and the conical sealing seat (10), and an iron gasket (14) is arranged between the packing (7), the pressing sleeve (12) and the conical sealing seat (10).

2. A ball valve according to claim 1, characterized in that: The top of the valve stem (19) is connected to a handle (17), the upper part of the valve stem (19) is threadedly connected to a first nut (4) located on one side of the handle (17), the valve stem (19) is provided with a locking plate (16) located on one side of the handle (17), and the valve stem (19) is threadedly connected to the first nut (4) located on one side of the gasket.

3. A ball valve according to claim 1, characterized in that: A pressing plate (13) is installed above the filler (7).

4. A ball valve according to claim 1, characterized in that: The valve body (1) is connected to a sub-body (5) located on one side of the valve body (1) via a bolt (3), and the lower end of the valve stem (19) is connected to a ball (2).

5. A ball valve according to claim 4, characterized in that: A valve seat (6) is installed on the inner sides of the valve body (1) and the auxiliary body (5), and the ball (2) is located inside the valve seat (6).

6. A ball valve according to claim 5, characterized in that: A plurality of ladder-shaped blocks (15) are integrally connected to one side of the valve seat (6), and the valve body (1) is provided with a ladder-shaped groove (18) for accommodating the ladder-shaped blocks (15).

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