Pipeline ball valve

Abstract

The utility model discloses a pipeline ball valve which comprises a pipeline ball valve shell, a pipeline ball valve rod is arranged in the pipeline ball valve shell, a ball valve ball body is connected to the inner wall of the pipeline ball valve shell in a sliding mode, the outer surface of the ball valve ball body is fixedly connected with the bottom end of the pipeline ball valve rod, and a through hole is formed in the upper surface of the pipeline ball valve shell. A through hole is formed in the top end of the pipeline ball valve rod and extends to the position above the through hole, the inner wall of the through hole is in threaded connection with a sealing cover, two O-shaped sealing rings are arranged on the inner ring of the sealing cover, the inner rings of the two O-shaped sealing rings make close contact with the outer surface of the pipeline ball valve rod, a metal sealing ring is arranged in the pipeline ball valve shell, and the metal sealing ring is in threaded connection with the inner wall of the pipeline ball valve rod. A soft sealing ring is arranged in the pipeline ball valve shell, and a fireproof ring is fixedly connected to the outer surface of the metal sealing ring. The pipeline ball valve is provided with a multi-sealing structure, the fireproof effect is improved, the sealing performance inside and outside the pipeline ball valve is guaranteed, and potential safety hazards in practical application are reduced.

Description

Technical Field

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

[0002] Pipeline ball valves are suitable for cutting off or connecting media on pipelines in various working conditions such as petroleum, chemical industry, thermal power plants, etc. The applicable media of pipeline ball valves are petroleum, purified natural gas, sour natural gas, coal gas, water, coal slurry and other media. The driving device operation modes of pipeline ball valves include manual, worm gear drive, pneumatic, electric and gas-liquid linkage.

[0003] However, the current pipeline ball valve has poor fireproof effect in the fire state, and it is difficult to ensure the sealing performance inside and outside the pipeline ball valve, which then poses a safety hazard in actual application. Therefore, we propose a pipeline ball valve to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a pipeline ball valve to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A pipeline ball valve comprises a pipeline ball valve shell, wherein a pipeline ball valve stem is arranged inside the pipeline ball valve shell, a ball valve ball is slidably connected to the inner wall of the pipeline ball valve shell, an outer surface of the ball valve ball is fixedly connected to the bottom end of the pipeline ball valve stem, a through hole is opened on the upper surface of the pipeline ball valve shell, the top end through hole of the pipeline ball valve stem extends to the top of the through hole, a sealing cover is threadedly connected to the inner wall of the through hole, two O-rings are arranged on the inner ring of the sealing cover, the inner rings of the two O-rings are in close contact with the outer surface of the pipeline ball valve stem, a metal sealing ring is arranged inside the pipeline ball valve shell, a soft sealing ring is arranged inside the pipeline ball valve shell, a fireproof ring is fixedly connected to the outer surface of the metal sealing ring, and connecting seats are fixedly connected to the left and right ends of the pipeline ball valve shell.

[0007] As a preferred technical solution of the present application, a wound gasket is fixedly connected to the bottom surface of the sealing cover, and the bottom surface of the wound gasket is in contact with the inner wall of the through hole.

[0008] As a preferred technical solution of the present application, the inner ring of the soft sealing ring contacts the outer surface of the ball of the ball valve, and the outer surface of the fireproof ring contacts the inner wall of the pipeline ball valve shell.

[0009] As a preferred technical solution of the present application, a connection disk is fixedly connected to the upper surface of the sealing cover, and a first threaded connection groove is provided on the upper surface of the connection disk.

[0010] As a preferred technical solution of the present application, two support blocks are fixedly connected to the bottom surface of the pipeline ball valve housing, and the bottom surfaces of the two support blocks are fixedly connected to a mounting plate.

[0011] As a preferred technical solution of the present application, mounting holes are provided on the upper surfaces of the two mounting plates, and second threaded connecting grooves are provided on the side surfaces of the two connecting seats that are away from each other.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The pipeline ball valve has multiple O-rings on the sealing cover to seal the sealing cover and the pipeline ball valve stem. The spiral wound gasket can be used to seal the sealing cover and the pipeline ball valve shell. The soft sealing ring, metal sealing ring and fireproof ring can effectively seal the ball valve body and the pipeline ball valve shell. The pipeline ball valve has a multiple sealing structure, which improves the fireproof effect, ensures the sealing performance inside and outside the pipeline ball valve, and reduces the safety hazards in actual application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the front view of the pipeline ball valve.

[0015] Figure 2 It is a schematic diagram of the three-dimensional structure of the side view of the pipeline ball valve.

[0016] Figure 3 It is a cross-sectional view of the front view of the pipeline ball valve.

[0017] Figure 4 For pipeline ball valve Figure 3 A schematic diagram of the enlarged structure in the middle.

[0018] In the figure: 1. pipeline ball valve shell; 2. pipeline ball valve stem; 3. connecting seat; 4. second threaded connecting groove; 5. ball valve ball; 6. soft sealing ring; 7. metal sealing ring; 8. fireproof ring; 9. spiral wound gasket; 10. sealing cover; 11. O-ring; 12. connecting plate; 13. first threaded connecting groove; 14. support block; 15. mounting plate; 16. mounting hole; 17. through hole. DETAILED DESCRIPTION

[0019] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection, it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two components. The technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present utility model.

[0020] See also Figure 1-4 In the utility model, a pipeline ball valve comprises a pipeline ball valve housing 1, a pipeline ball valve stem 2 is arranged inside the pipeline ball valve housing 1, a ball valve body 5 is slidably connected to the inner wall of the pipeline ball valve housing 1, the outer surface of the ball valve body 5 is fixedly connected to the bottom end of the pipeline ball valve stem 2, a through hole 17 is opened on the upper surface of the pipeline ball valve housing 1, the top through hole 17 of the pipeline ball valve stem 2 extends to the top of the through hole 17, a sealing cover 10 is threadedly connected to the inner wall of the through hole 17, and the inner ring of the sealing cover 10 is provided with two O-type sealing Ring 11, the inner rings of the two O-rings 11 are in close contact with the outer surface of the pipeline ball valve stem 2, a metal sealing ring 7 is arranged inside the pipeline ball valve shell 1, a soft sealing ring 6 is arranged inside the pipeline ball valve shell 1, and a fireproof ring 8 is fixedly connected to the outer surface of the metal sealing ring 7. The left and right ends of the pipeline ball valve shell 1 are fixedly connected with a connecting seat 3. The normal installation of the pipeline ball valve stem 2 is ensured by the setting of the through hole 17, and the sealing cover 10 is used to seal the through hole 17 and the pipeline ball valve stem 2.

[0021] The bottom surface of the sealing cover 10 is fixedly connected with a spiral wound gasket 9, the bottom surface of the spiral wound gasket 9 contacts the inner wall of the through hole 17, the inner ring of the soft sealing ring 6 contacts the outer surface of the ball valve ball 5, the outer surface of the fireproof ring 8 is in close contact with the inner wall of the pipeline ball valve shell 1, and the spiral wound gasket 9 set by the sealing cover 10 will achieve better sealing, and the inner ring of the soft sealing ring 6 and the outer surface of the ball valve ball 5 will be used to improve the sealing effect between the ball valve ball 5 and the pipeline ball valve shell 1.

[0022] A connecting plate 12 is fixedly connected to the upper surface of the sealing cover 10, and a first threaded connecting groove 13 is provided on the upper surface of the connecting plate 12. Two supporting blocks 14 are fixedly connected to the bottom surface of the pipeline ball valve shell 1, and mounting plates 15 are fixedly connected to the bottom surfaces of the two supporting blocks 14. Mounting holes 16 are provided on the upper surfaces of the two mounting plates 15. Second threaded connecting grooves 4 are provided on the side surfaces of the two connecting seats 3 that are away from each other. Through the connecting plate 12 and the first threaded connecting groove 13, they can be connected and installed with worm gear transmission, pneumatic, electric, gas-liquid linkage and other components respectively. By using the mounting plate 15 and the mounting hole 16, and in cooperation with the supporting block 14, the support for the pipeline ball valve shell 1 can be deepened to enhance the stability of the pipeline ball valve shell 1.

[0023] The working principle of the utility model is: firstly, the ball valve ball 5 is installed inside the pipeline ball valve shell 1, and then the pipeline ball valve stem 2 and the sealing cover 10 are installed in sequence, and the O-ring 11 can be used to seal the sealing cover 10 and the pipeline ball valve stem 2, and the spiral wound gasket 9 can seal the sealing cover 10 and the pipeline ball valve shell 1, and then the soft sealing ring 6, the metal sealing ring 7 and the fireproof ring 8 are used to seal the ball valve ball 5 and the pipeline ball valve shell 1, so that multiple sealing can be performed inside and outside the ball valve.

[0024] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and utility model concept of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, so it is intended to include all changes that fall within the meaning and scope of the equivalent elements of the claims in the utility model. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0025] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A pipeline ball valve, characterized in that: The pipeline ball valve comprises a pipeline ball valve housing (1), wherein a pipeline ball valve stem (2) is arranged inside the pipeline ball valve housing (1), a ball valve ball (5) is slidably connected to the inner wall of the pipeline ball valve housing (1), the outer surface of the ball valve ball (5) is fixedly connected to the bottom end of the pipeline ball valve stem (2), a through hole (17) is opened on the upper surface of the pipeline ball valve housing (1), the top end through hole (17) of the pipeline ball valve stem (2) extends to the top of the through hole (17), and a sealing cover is threadedly connected to the inner wall of the through hole (17) (10), the inner ring of the sealing cover (10) is provided with two O-rings (11), the inner rings of the two O-rings (11) are in close contact with the outer surface of the pipeline ball valve stem (2), the interior of the pipeline ball valve shell (1) is provided with a metal sealing ring (7), the interior of the pipeline ball valve shell (1) is provided with a soft sealing ring (6), the outer surface of the metal sealing ring (7) is fixedly connected with a fireproof ring (8), and the left and right ends of the pipeline ball valve shell (1) are fixedly connected with a connecting seat (3).

2. A pipeline ball valve according to claim 1, characterized in that: A wound gasket (9) is fixedly connected to the bottom surface of the sealing cover (10), and the bottom surface of the wound gasket (9) is in contact with the inner wall of the through hole (17).

3. A pipeline ball valve according to claim 1, characterized in that: The inner ring of the soft sealing ring (6) is in contact with the outer surface of the ball valve ball (5), and the outer surface of the fireproof ring (8) is in close contact with the inner wall of the pipeline ball valve shell (1).

4. A pipeline ball valve according to claim 1, characterized in that: A connection plate (12) is fixedly connected to the upper surface of the sealing cover (10), and a first threaded connection groove (13) is provided on the upper surface of the connection plate (12).

5. The pipeline ball valve according to claim 1, characterized in that: Two support blocks (14) are fixedly connected to the bottom surface of the pipeline ball valve housing (1), and a mounting plate (15) is fixedly connected to the bottom surfaces of the two support blocks (14).

6. A pipeline ball valve according to claim 5, characterized in that: The upper surfaces of the two mounting plates (15) are each provided with a mounting hole (16), and the side surfaces of the two connecting seats (3) that are away from each other are each provided with a second threaded connection groove (4).

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