Embedded ash discharging ball valve

Abstract

The utility model discloses an embedding type ash discharging ball valve, which relates to the technical field of valves and comprises a valve body, a ball body, a valve seat and an upper valve rod are arranged in the valve body, the upper portion of the upper valve rod is connected with a driving device, a lower valve rod used for supporting the ball body is arranged at the lower end of the ball body, and the ball body comprises a first hemisphere and a second hemisphere which are arranged oppositely. A linkage mechanism is arranged between the upper valve rod and the ball body, and the upper valve rod can rotate to drive the linkage mechanism so as to drive the first hemisphere and the second hemisphere to be closed or separated. The flow resistance is small during opening and closing, the rotating stroke of the valve rod is shortened, the opening and closing torque of the valve can be effectively reduced, accumulated objects on the sealing face can be cleaned through the hemisphere opening and closing type movement mode, and the sealing stability of the valve is guaranteed.

Description

Technical Field

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

[0002] The ash discharge ball valve is a ball valve with a hemispherical opening and closing part. It has the advantages of small opening force and the ability to break through scale obstacles when closed. Therefore, it is widely used in application scenarios where there are large amounts of granular hard solids in the medium, such as boiler pipelines and coal slurry pipelines in power plants.

[0003] In pipeline media such as coal powder, fiber-containing, and tiny solid particles, a smaller torque is required for opening and closing. However, the valve is opened and closed by using the valve stem to drive the hemisphere to rotate, which results in a large flow resistance. A certain amount of particles and dust impurities will still gather on the sealing surface, causing a certain amount of friction during the opening and closing process and damaging the sealing surface. Summary of the invention

[0004] In view of the deficiencies in the prior art, the utility model provides a chimeric ash-discharging ball valve.

[0005] The technical solution provided by the utility model is:

[0006] The embedded ash unloading ball valve includes a valve body, a ball, a valve seat and an upper valve stem are arranged in the valve body, the upper part of the upper valve stem is connected to the driving device, and the lower end of the ball is provided with a lower valve stem for supporting the ball. The ball includes a first hemisphere and a second hemisphere arranged in opposition, and a linkage mechanism is arranged between the upper valve stem and the ball. The rotation of the upper valve stem can drive the linkage mechanism, thereby driving the first hemisphere and the second hemisphere to close or separate.

[0007] The linkage mechanism includes a rocker arm, a linkage shaft, a first crank, and a second crank. One end of the rocker arm is connected to the upper valve stem, and the other end is connected to the linkage shaft. Both ends of the first crank are respectively connected to the linkage shaft and the first hemisphere. Both ends of the second crank are respectively connected to the linkage shaft and the second hemisphere.

[0008] A fixing plate is provided at the lower end of the linkage mechanism, a positioning hole is provided at one end of the fixing plate, a fixing pin is provided in the positioning hole, a pin hole is provided on the inner wall of the valve body, and the fixing plate is fixed by inserting the fixing pin into the pin hole.

[0009] The joining portion of the first hemisphere and the second hemisphere is a tooth-shaped structure.

[0010] A valve seat pressure cover is provided on the outside of the valve seat, a groove is provided on the valve seat close to the valve seat pressure cover, a spring is provided in the groove, one end of the spring presses against the bottom of the groove, and the other end presses against the valve seat pressure cover, and the valve seat pressure cover is connected to the valve body by screws to provide pre-tightening force for the spring.

[0011] The beneficial effects of the utility model are as follows: the utility model sets a linkage mechanism between the upper valve stem and the ball, and the ball is set to a split type. The linkage mechanism is driven by the upper valve stem to control the closing or separation of the two split hemispheres. The flow resistance is small when the valve is opened and closed, and the rotation stroke of the valve stem is shortened, which can effectively reduce the opening and closing torque of the valve. The opening and closing movement of the hemispheres can clean the accumulation on the sealing surface and ensure the stability of the valve seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the cross-sectional structure of an embodiment of the utility model;

[0013] Figure 2 It is a top view of part of the structure of the embodiment of the utility model (valve closed state);

[0014] Figure 3 It is a top view of part of the structure of the embodiment of the utility model (valve open state);

[0015] Figure 4 for Figure 1 A partial enlarged view of . DETAILED DESCRIPTION

[0016] The embodiments of the present utility model will be further described below in conjunction with the accompanying drawings.

[0017] like Figure 1-3 As shown, a mosaic ash unloading ball valve includes a valve body 1, in which a ball 4, a valve seat 9, and an upper valve stem 2 are arranged. The upper part of the upper valve stem 2 is connected to a driving device 12, and a lower valve stem 3 for supporting the ball is provided at the lower end of the ball 4. The ball 4 includes a first hemisphere 21 and a second hemisphere 22 which are arranged in opposition. A linkage mechanism 7 is provided between the upper valve stem 2 and the ball 4. The rotation of the upper valve stem 2 can drive the linkage mechanism 7, thereby driving the first hemisphere 21 and the second hemisphere 22 to close or separate.

[0018] The linkage mechanism 7 can be any transmission structure that can reduce the rotation stroke of the valve stem, such as a gear transmission structure, a crank transmission structure, etc. In this embodiment, the linkage mechanism 7 includes a rocker arm 26, a linkage shaft 27, a first crank 28, and a second crank 29. One end of the rocker arm 26 is connected to the upper valve stem 2, and the other end is connected to the linkage shaft 27. The two ends of the first crank 28 are respectively connected to the linkage shaft 27 and the first hemisphere 28, and the two ends of the second crank 29 are respectively connected to the linkage shaft 27 and the second hemisphere 22.

[0019] like Figure 2-3As shown, when the valve is opened, the upper valve stem 2 rotates 45° counterclockwise, the rocker rod 26 drives the linkage shaft 27 to rotate 90° clockwise, the first crank 28 drives the first hemisphere 21 to rotate 90° counterclockwise, and the second crank 29 drives the second hemisphere 22 to rotate 90° clockwise to complete the opening. Conversely, the valve can be closed. With this structure, the flow resistance is small when the valve is opened and closed, and the rotation stroke of the valve stem is shortened, which can effectively reduce the opening and closing torque of the valve. The hemispherical opening and closing movement can clean the accumulation on the sealing surface and ensure the stability of the valve seal. Compared with the gear transmission structure, the crank transmission structure is not easily affected by particulate matter in the medium and is not easy to get stuck.

[0020] Furthermore, a fixing plate 5 is provided at the lower end of the linkage mechanism 7, a positioning hole 24 is provided at one end of the fixing plate 5, a fixing pin 25 is provided in the positioning hole 24, a pin hole 6 is provided on the inner wall of the valve body 1, and the fixing plate 5 is fixed by inserting the fixing pin 25 into the pin hole 6. The fixing plate 5 provides support for the linkage mechanism 7 to prevent it from falling off or transmission failure due to impact of the medium, thereby ensuring smooth opening and closing of the valve.

[0021] In this embodiment, the joint between the first hemisphere 21 and the second hemisphere 22 is a tooth-shaped structure 23. The tooth-shaped structure enables the two hemispheres to be closed more tightly and less likely to leak.

[0022] like Figure 4 As shown, a valve seat gland 13 is provided on the outside of the valve seat 6, a groove 32 is provided on the side of the valve seat 6 close to the valve seat gland, a spring 33 is provided in the groove 32, one end of the spring 33 presses against the bottom of the groove 32, and the other end presses against the valve seat gland 13, the valve seat gland 13 is connected to the valve body 1 by screws to provide a pre-tightening force for the spring 33, and the piston valve seat 6 can still ensure a stable seal during the opening and closing process of the two hemispheres.

[0023] The embodiments should not be regarded as limiting the present invention, and any non-creative improvements made based on the spirit of the present invention should be regarded as falling within the protection scope of the present invention.

Claims

1. A chimeric ash discharge ball valve, comprising a valve body, a ball, a valve seat, and an upper valve stem arranged in the valve body, the upper portion of the upper valve stem being connected to a driving device, and a lower valve stem for supporting the ball being arranged at the lower end of the ball, characterized in that: The sphere includes a first hemisphere and a second hemisphere that are arranged in a split manner. A linkage mechanism is provided between the upper valve stem and the sphere. The rotation of the upper valve stem can drive the linkage mechanism, thereby driving the first hemisphere and the second hemisphere to close or separate.

2. The embedded ash discharge ball valve according to claim 1 is characterized in that: The linkage mechanism includes a rocker arm, a linkage shaft, a first crank, and a second crank. One end of the rocker arm is connected to the upper valve stem, and the other end is connected to the linkage shaft. Both ends of the first crank are respectively connected to the linkage shaft and the first hemisphere. Both ends of the second crank are respectively connected to the linkage shaft and the second hemisphere.

3. The embedded ash discharge ball valve according to claim 1 is characterized in that: A fixing plate is provided at the lower end of the linkage mechanism, a positioning hole is provided at one end of the fixing plate, a fixing pin is provided in the positioning hole, a pin hole is provided on the inner wall of the valve body, and the fixing plate is fixed by inserting the fixing pin into the pin hole.

4. The embedded ash discharge ball valve according to claim 1 is characterized in that: The joining portion of the first hemisphere and the second hemisphere is a tooth-shaped structure.

5. The embedded ash discharge ball valve according to claim 1 is characterized in that: A valve seat pressure cover is provided on the outside of the valve seat, a groove is provided on the valve seat close to the valve seat pressure cover, a spring is provided in the groove, one end of the spring presses against the bottom of the groove, and the other end presses against the valve seat pressure cover, and the valve seat pressure cover is connected to the valve body by screws to provide pre-tightening force for the spring.

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