Metal sealing ball valve with oil injection sealing of valve seat

Abstract

The utility model discloses a metal sealing ball valve with a valve seat for oil injection sealing, which comprises a valve body, the valve seat is fixedly connected inside the valve body, a first oil injection hole is arranged on the valve body, a second oil injection hole is arranged on the valve seat, the first oil injection hole is communicated with the second oil injection hole, a ball body is arranged inside the valve body, and the ball body is connected with the valve seat. The valve seat is in contact with the spherical surface of the ball body, the second oil injection hole is far away from the first oil injection hole and is communicated to the spherical surface of the ball body, the ball body is fixedly connected with an upper valve shaft, a through round hole is formed in the left side of the valve body, and the upper valve shaft passes through the left side round hole of the valve body and is provided with a driving device far away from the ball body. The driving device is fixedly connected with a support close to the upper valve shaft, and a filler pressing block is fixedly connected in the support close to the driving device. By means of the structure, the valve body, the valve seat, the first oil injection hole, the second oil injection hole and the ball body are arranged, abrasion can be reduced, sealing reliability of a sealing pair is enhanced, and zero leakage is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a metal sealing ball valve with an oil-filled sealing valve seat. Background Art

[0002] Ball valves are widely used in various media working conditions due to their simple structure and small flow resistance when opened. The structure of a ball valve generally includes a valve body, a valve cover, a valve seat, a valve stem, a ball, a transmission mechanism, a seal and a mounting part. The valve seat is composed of a floating valve seat and a fixed valve seat. The valve seat sealing surface cooperates with the ball sealing surface to form a ball valve sealing pair.

[0003] At present, metal sealing valves have the problem of poor sealing in practical applications, especially when users need to repair urgently, which affects the safety of maintenance and operators. It is necessary to add effective sealing devices to carry out maintenance, which prolongs the maintenance time and maintenance cost. The structure of the metal sealing ball valve is improved, and a method is proposed to achieve reliable cutting of the ball valve by adding grease, thereby improving the reliability of the valve. Utility Model Content

[0004] The utility model provides a metal sealing ball valve with oil-filled sealing of a valve seat, which can reduce wear, enhance the reliability of sealing of a sealing pair, and achieve zero leakage.

[0005] In order to achieve the above-mentioned purpose, a metal-sealed ball valve with a valve seat oil-filled seal is provided, comprising a valve body, the valve seat is fixedly connected to the inside of the valve body, a first oil-filling hole is arranged on the valve body, a second oil-filling hole is arranged on the valve seat, the first oil-filling hole and the second oil-filling hole are communicated, a ball is arranged inside the valve body, the valve seat is in contact with the spherical surface of the ball, the second oil-filling hole is away from the first oil-filling hole and is communicated to the spherical surface of the ball, and the ball is fixedly connected to the valve shaft. By arranging the first oil-filling hole and the second oil-filling hole on the valve body and the valve seat and allowing the first oil-filling hole and the second oil-filling hole to communicate when the valve is closed, it is convenient to inject lubricating oil from the outside to lubricate the surface of the ball, avoid wear between the sealing pair, reduce the friction coefficient between the ball and the valve seat, avoid torque overload of the driving device, and at the same time, grease can fill the leakage points between the metal sealing pairs, thereby hindering the circulation of the medium and achieving zero leakage of the sealing pair.

[0006] According to the metal-sealed ball valve with oil-filled sealing of the valve seat, a through circular hole is provided on the left side of the valve body, the upper valve shaft passes through the circular hole on the left side of the valve body, and a driving device is provided on the upper valve shaft away from the ball. The driving device is provided to facilitate driving the upper valve shaft to rotate, thereby driving the ball to rotate, thereby realizing control of the opening and closing of the valve.

[0007] According to the metal-sealed ball valve with oil-filled valve seat seal, the drive device is fixedly connected to the bracket near the upper valve shaft, the inside of the bracket is fixedly connected to the packing block near the drive device, the upper valve shaft passes through the packing block and the bracket, and the end of the packing block away from the drive device is in the circular hole on the left side of the valve body. The bracket is provided to facilitate the connection of the valve body, and the packing block is provided to facilitate the squeezing of the packing, thereby ensuring the sealing effect of the first sealing ring and preventing liquid or gas leakage in the valve body.

[0008] According to the metal-sealed ball valve with oil-filled sealing of the valve seat, the cylindrical surface of the upper valve shaft is slidably connected to the stuffing sleeve, and the stuffing sleeve is in contact with the right side surface of the stuffing pressing block.

[0009] According to the metal-sealed ball valve with oil-filled valve seat seal, the packing sleeve is provided with a first sealing ring away from the packing block, the first sealing ring is ringed on the cylindrical surface of the upper valve shaft, and the first sealing ring is inside the circular hole on the left side of the valve body. The first sealing ring is provided to facilitate sealing of the left end of the valve body.

[0010] According to the metal-sealed ball valve with oil-filled sealing of the valve seat, the valve body is fixedly connected to the gland away from the valve seat, and the gland is away from contact with the surface of the valve seat.

[0011] According to the metal-sealed ball valve with oil-filled valve seat seal, a through circular hole is provided on the right side of the valve body, the cylindrical surface of the through circular hole of the valve body is fixedly connected to the lower valve shaft, a circular groove is provided on the right side surface of the valve body, the circular hole on the right side of the valve body is at the center of the circular groove, and a second sealing ring is provided in the circular groove on the right side of the valve body. The second sealing ring is provided to facilitate sealing of the right side of the valve body, thereby ensuring the sealing of the entire valve body.

[0012] According to the metal-sealed ball valve with oil-filled valve seat seal, the right side surface of the valve body is fixedly connected to the end cover, the left side of the end cover is stuck in the through hole on the right side of the valve body, and the end cover passes through the second sealing ring. The end cover is provided to facilitate the fixing of the second sealing ring.

[0013] The beneficial effects of the utility model are as follows: by arranging the valve body, the valve seat, the first oil filling hole, the second oil filling hole and the ball, wear can be reduced, the reliability of the sealing pair can be enhanced, and zero leakage can be achieved.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0016] Figure 1 This is a schematic diagram of the overall structure of a metal-sealed ball valve with oil-filled valve seat seal according to the utility model;

[0017] Figure 2 This is a schematic diagram of the overall cross-sectional structure of a metal-sealed ball valve with oil-filled valve seat seal according to the utility model;

[0018] Figure 3 This is an enlarged view of the local structure at A of a metal-sealed ball valve with oil-filled valve seat seal of the utility model;

[0019] Figure 4 This is an enlarged view of the local structure at B of a metal-sealed ball valve with oil-filled valve seat seal of the utility model;

[0020] Figure 5 It is an enlarged view of the local structure at position C of a metal-sealed ball valve with a valve seat oil-filled seal according to the utility model.

[0021] Legend:

[0022] 1. Driving device; 2. Bracket; 3. Upper valve shaft; 4. Packing block; 5. Packing sleeve; 6. Valve body; 7. Ball; 8. Gland; 9. Valve seat; 10. Lower valve shaft; 11. End cover; 12. First sealing ring; 13. First oil filling hole; 14. Second oil filling hole; 15. Second sealing ring. DETAILED DESCRIPTION

[0023] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0024] Reference Figure 1-5 The utility model embodiment is a metal sealed ball valve with valve seat oil filling seal, which includes a valve body 6, the valve body 6 is fixedly connected to the valve seat 9, the valve body 6 is provided with a first oil filling hole 13, the valve seat 9 is provided with a second oil filling hole 14, the first oil filling hole 13 and the second oil filling hole 14 are communicated with each other, a ball 7 is provided inside the valve body 6, the valve seat 9 and the spherical surface of the ball 7 are in contact, the second oil filling hole 14 is away from the first oil filling hole 13 and is connected to the spherical surface of the ball 7, the ball 7 is fixedly connected to the upper valve shaft 3, the valve body 6 is fixedly connected to the pressure cover 8 away from the valve seat 9, the pressure cover 8 is away from the valve seat 9 surface contact, when the valve is closed, grease enters the ball valve sealing pair through the first oil filling hole 13 and the second oil filling hole 14, ensures zero leakage of the valve, and then realizes the replacement of the pipeline cut-off valve, realizes multiple uses of one valve, reduces the number of valve groups, reduces the space occupied by pipelines, realizes the centralization and refinement of the system, and improves the utilization efficiency of equipment.

[0025] A through circular hole is arranged on the left side of the valve body 6, and the upper valve shaft 3 passes through the left circular hole of the valve body 6. A driving device 1 is arranged on the upper valve shaft 3 away from the ball 7. The driving device 1 drives the ball 7 to rotate through the upper valve shaft 3 to realize the opening and closing of the ball valve.

[0026] A through circular hole is provided on the right side of the valve body 6, and the cylindrical surface of the through circular hole of the valve body 6 is fixedly connected to the lower valve shaft 10. A circular groove is provided on the right side surface of the valve body 6, and the circular hole on the right side of the valve body 6 is at the center of the circular groove. A second sealing ring 15 is provided in the circular groove on the right side of the valve body 6. The right side surface of the valve body 6 is fixedly connected to the end cover 11, and the left side of the end cover 11 is stuck in the through circular hole on the right side of the valve body 6, and the end cover 11 passes through the second sealing ring 15.

[0027] The driving device 1 is fixedly connected to the bracket 2 near the upper valve shaft 3, and the inside of the bracket 2 is fixedly connected to the packing block 4 near the driving device 1. The upper valve shaft 3 passes through the packing block 4 and the bracket 2, and the end of the packing block 4 away from the driving device 1 is in the circular hole on the left side of the valve body 6.

[0028] The cylindrical surface of the upper valve shaft 3 is slidingly connected to the stuffing sleeve 5, the stuffing sleeve 5 is in contact with the right surface of the stuffing block 4, and the stuffing sleeve 5 is provided with a first sealing ring 12 away from the stuffing block 4. The first sealing ring 12 is ringed on the cylindrical surface of the upper valve shaft 3, and the first sealing ring 12 is inside the circular hole on the left side of the valve body 6.

[0029] Working principle: When the valve is closed, the first oil filling hole 13 and the second oil filling hole 14 are connected. At this time, the external lubricating oil is injected into the connection between the ball 7 and the valve seat 9 through the first oil filling hole 13 and the second oil filling hole 14, and the sealing surface of the ball 7 is lubricated, reducing the wear between the ball 7 and the valve seat 9, and also reducing the friction coefficient between the ball 7 and the valve seat 9, avoiding torque overload of the drive device 1, and the grease will fill the leakage point, hinder the circulation of the medium, and achieve zero leakage of the sealing pair.

[0030] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A metal-sealed ball valve with oil-filled valve seat seal, characterized in that: The invention comprises a valve body (6), wherein the valve body (6) is fixedly connected to a valve seat (9), a first oil injection hole (13) is arranged on the valve body (6), a second oil injection hole (14) is arranged on the valve seat (9), the first oil injection hole (13) and the second oil injection hole (14) are communicated with each other, a ball (7) is arranged inside the valve body (6), the spherical surfaces of the valve seat (9) and the ball (7) are in contact, the second oil injection hole (14) is away from the first oil injection hole (13) and communicates with the spherical surface of the ball (7), and the ball (7) is fixedly connected to the upper valve shaft (3).

2. A metal-sealed ball valve with oil-filled valve seat seal according to claim 1, characterized in that: A through circular hole is provided on the left side of the valve body (6), the upper valve shaft (3) passes through the circular hole on the left side of the valve body (6), and a driving device (1) is provided on the upper valve shaft (3) away from the ball (7).

3. A metal-sealed ball valve with oil-filled valve seat seal according to claim 2, characterized in that: The drive device (1) is fixedly connected to the bracket (2) near the upper valve shaft (3); the inside of the bracket (2) is fixedly connected to the packing block (4) near the drive device (1); the upper valve shaft (3) passes through the packing block (4) and the bracket (2); and the end of the packing block (4) away from the drive device (1) is in the circular hole on the left side of the valve body (6).

4. A metal-sealed ball valve with oil-filled valve seat seal according to claim 1, characterized in that: The cylindrical surface of the upper valve shaft (3) is slidably connected to a packing sleeve (5), and the packing sleeve (5) is in contact with the right side surface of the packing pressing block (4).

5. A metal-sealed ball valve with oil-filled valve seat seal according to claim 4, characterized in that: The packing sleeve (5) is provided with a first sealing ring (12) away from the packing pressing block (4); the first sealing ring (12) is ringed on the cylindrical surface of the upper valve shaft (3); the first sealing ring (12) is inside the circular hole on the left side of the valve body (6).

6. A metal-sealed ball valve with oil-filled valve seat seal according to claim 1, characterized in that: The valve body (6) is fixedly connected to the gland (8) away from the valve seat (9), and the gland (8) is in surface contact away from the valve seat (9).

7. A metal-sealed ball valve with oil-filled valve seat seal according to claim 1, characterized in that: A through circular hole is provided on the right side of the valve body (6); the cylindrical surface of the through circular hole of the valve body (6) is fixedly connected to the lower valve shaft (10); a circular groove is provided on the right side surface of the valve body (6); the circular hole on the right side of the valve body (6) is located at the center of the circular groove; and a second sealing ring (15) is provided in the circular groove on the right side of the valve body (6).

8. The metal-sealed ball valve with oil-filled valve seat seal according to claim 1, characterized in that: The right side surface of the valve body (6) is fixedly connected to an end cover (11), the left side of the end cover (11) is clamped in a through circular hole on the right side of the valve body (6), and the end cover (11) passes through a second sealing ring (15).

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