Coal lock lower valve seat convenient to disassemble and maintain

Abstract

The utility model discloses a coal lock lower valve seat convenient to disassemble and maintain, and relates to the technical field of gasification furnace coal lock devices. Comprising a valve seat body and a valve body, a step groove is formed in the butt joint portion of the valve seat body, a first sealing ring and a disc spring are arranged in the step groove, an assembly cavity is formed in the butt joint portion of the valve body, and the butt joint portion of the valve seat body is arranged in the assembly cavity; according to the coal lock lower valve seat convenient to disassemble and maintain, the arranged disc spring can store certain potential energy and release part of potential energy, the pressure between the valve seat body and the valve body can be kept to meet the sealing requirement, a certain gap can be reserved, the gap between the valve seat body and the valve body is increased, meanwhile, the arranged blowing opening is externally connected with a blowing system, and the blowing effect is good. And a gap between the valve seat body and the valve main body, the surface of the valve core and the middle valve cavity are intermittently purged, so that the adhesion and accumulation of coal ash are not easy to generate between the valve seat body and the valve main body and on the surface of the valve core, and the convenience during disassembly is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal lock devices for gasifiers, in particular to a coal lock lower valve seat which is easy to disassemble and maintain. Background Art

[0002] The coal lock is a pressure vessel for intermittently adding coal from the coal bunker to the gasifier. It is connected to the coal bunker at the top and the gasifier at the bottom. The middle of the structure is a cylindrical cylinder, and the upper part is connected to a butterfly head. The upper and lower inlets are controlled by upper and lower valves of the coal lock, and the side is connected to the coal lock filling and pressure relief pipelines and the transmission shaft that drives the lower valve of the coal lock. The coal lock is a key equipment for pressurized coal adding of the gasifier, and is responsible for the feeding of the gasifier. During the circulating feeding period, the lower valve of the coal lock must be closed tightly before the coal adding operation can be carried out.

[0003] When the coal lock maintenance cycle comes, the coal lock lower valve seat and lower valve head need to be replaced. During the more than one year of operation, dust and tar have accumulated inside and the gap is small, making disassembly difficult. With the use of special tools such as hammering and gas cutting and baking, the disassembly time is as short as two days and as long as five to six days, which greatly restricts the maintenance time of the coal lock. Utility Model Content

[0004] The utility model provides a coal lock lower valve seat which is easy to disassemble and maintain, so as to solve the problems in the background technology.

[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a coal lock lower valve seat that is easy to disassemble and maintain, comprising a valve seat body and a valve body, the docking portion of the valve seat body being provided with a step groove, a first sealing ring and a disc spring being respectively arranged in the step groove, the docking portion of the valve body being provided with an assembly cavity, the docking portion of the valve seat body being placed in the assembly cavity, and the valve seat body being fastened to the valve body by bolts, the disc spring being located between the joint surfaces of the valve seat body and the valve body, a purge port being provided at the docking portion of the valve seat body, and a sealing plug being threadedly connected to the end of the purge port, a valve core being provided in the valve body, and a valve stem being connected to the valve core, and the tail end of the valve stem extending outside the valve body.

[0006] Furthermore, a second sealing ring is arranged in the valve body, and the second sealing ring and the first sealing ring are respectively located on both sides of the valve core.

[0007] Furthermore, an axial hole is provided at the top of the valve body, and the tail end of the valve stem extends outward from the axial hole.

[0008] Furthermore, a shaft sleeve is arranged in the shaft hole, and the shaft sleeve is movably connected to the valve stem.

[0009] Furthermore, a mechanical seal is arranged in the shaft hole, and the mechanical seal is sleeved with the valve stem.

[0010] Furthermore, a valve cover is clamped on the top of the mechanical seal, and the valve cover is locked on the valve body by bolts.

[0011] Compared with the prior art, the utility model provides a coal lock lower valve seat that is easy to disassemble and maintain, and has the following beneficial effects:

[0012] The coal lock lower valve seat which is easy to disassemble and maintain is provided with a disc spring which can store a certain potential energy and release part of the potential energy, so as to maintain the pressure between the valve seat body and the valve body to meet the sealing requirement, and also leave a certain gap to increase the gap between the valve seat body and the valve body. At the same time, the provided purge port is connected to an external blowing system to intermittently purge the gap between the valve seat body and the valve body, the valve core surface, and the middle valve cavity, so that coal ash is not easily bonded or accumulated between the valve seat body and the valve body and on the valve core surface, thereby improving the convenience during disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 This is an exploded view of the valve seat body of the utility model;

[0015] Figure 3 It is a diagram of the valve body part of the utility model.

[0016] In the figure: 1. valve seat body; 11. stepped groove; 12. first sealing ring; 13. disc spring; 14. purge port; 15. plug; 2. valve body; 21. assembly cavity; 22. valve core; 23. valve stem; 24. second sealing ring; 25. shaft hole; 26. shaft sleeve; 27. mechanical seal; 28. valve cover. 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] See also Figure 1-Figure 3The utility model discloses a coal lock lower valve seat which is easy to disassemble and maintain, comprising a valve seat body 1 and a valve body 2, the butt joint of the valve seat body 1 is provided with a stepped groove 11, a first sealing ring 12 and a disc spring 13 are respectively arranged in the stepped groove 11, an assembly cavity 21 is provided at the butt joint of the valve body 2, the butt joint of the valve seat body 1 is placed in the assembly cavity 21, and the valve seat body 1 is fastened to the valve body 2 by bolts, the disc spring 13 is located between the joint surfaces of the valve seat body 1 and the valve body 2, a purge port 14 is provided at the butt joint of the valve seat body 1, and a sealing plug 15 is threadedly connected to the end of the purge port 14, and the disc spring 13 can store a certain amount of Potential energy, releasing part of the potential energy, can maintain the pressure between the valve seat body 1 and the valve body 2 to meet the sealing requirements, and can also leave a certain gap to increase the gap between the valve seat body 1 and the valve body 2. At the same time, the purge port 14 is connected to an external blowing system to intermittently purge the gap between the valve seat body 1 and the valve body 2, the surface of the valve core 22, and the middle valve cavity, so that it is not easy for coal ash to stick and accumulate between the valve seat body 1 and the valve body 2 and on the surface of the valve core 22, thereby improving the convenience during disassembly. A valve core 22 is provided in the valve body 2, and a valve stem 23 is connected to the valve core 22, and the tail end of the valve stem 23 extends to the outside of the valve body 2.

[0019] Specifically, a second sealing ring 24 is disposed in the valve body 2 , and the second sealing ring 24 and the first sealing ring 12 are respectively located on both sides of the valve core 22 .

[0020] In this embodiment, the second sealing ring 24 and the first sealing ring 12 work together to ensure the sealing between the valve core 22 and the middle valve cavity.

[0021] Specifically, an axial hole 25 is formed at the top of the valve body 2 , and the tail end of the valve stem 23 extends outward from the axial hole 25 .

[0022] In this embodiment, the shaft hole 25 is provided to facilitate the valve stem 23 to be externally connected to a driving mechanism, so as to open and close the valve through a power actuator.

[0023] Specifically, a shaft sleeve 26 is disposed in the shaft hole 25 , and the shaft sleeve 26 is movably sleeved with the valve stem 23 .

[0024] In this embodiment, the shaft sleeve 26 is a sleeve-type part installed on the mechanical shaft. The shaft sleeve 26 will withstand pressure and wear to reduce the wear and friction of the valve stem 23 and play a protective role.

[0025] Specifically, a mechanical seal 27 is disposed in the shaft hole 25 , and the mechanical seal 27 is sleeved with the valve stem 23 .

[0026] In this embodiment, the mechanical seal 27 is a shaft sealing device that achieves leakage prevention by means of one or more pairs of end faces that slide relative to each other perpendicular to the shaft and are kept in contact under the action of fluid pressure and the elastic force (or magnetic force) of a compensation mechanism and is equipped with an auxiliary seal.

[0027] Specifically, a valve cover 28 is clamped on the top of the mechanical seal 27, and the valve cover 28 is fixed to the valve body 2 by bolts.

[0028] In this embodiment, the valve cover 28 is used to compress the mechanical seal 27 to ensure the sealing between the mechanical seal 27 and the valve stem 23 .

[0029] When in use, the disc spring 13 can store a certain amount of potential energy and release part of the potential energy, so as to maintain the pressure between the valve seat body 1 and the valve body 2 to meet the sealing requirements, and also leave a certain gap to increase the gap between the valve seat body 1 and the valve body 2. At the same time, the purge port 14 is connected to an external blowing system to intermittently purge the gap between the valve seat body 1 and the valve body 2, the surface of the valve core 22, and the middle valve cavity, so that it is not easy for coal ash to stick and accumulate between the valve seat body 1 and the valve body 2 and on the surface of the valve core 22, thereby improving the convenience during disassembly.

[0030] To sum up, the coal lock lower valve seat which is easy to disassemble and maintain has a disc spring 13 which can store a certain amount of potential energy and release part of the potential energy, so as to maintain the pressure between the valve seat body 1 and the valve body 2 to meet the sealing requirements, and can also leave a certain gap to increase the gap between the valve seat body 1 and the valve body 2. At the same time, the purge port 14 is connected to an external blowing system to intermittently purge the gap between the valve seat body 1 and the valve body 2, the surface of the valve core 22, and the middle valve cavity, so that it is not easy for coal ash to stick and accumulate between the valve seat body 1 and the valve body 2 and on the surface of the valve core 22, thereby improving the convenience during disassembly.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coal lock lower valve seat that is easy to disassemble and maintain, comprising a valve seat body (1) and a valve body (2), characterized in that: The butt joint of the valve seat body (1) is provided with a stepped groove (11), and a first sealing ring (12) and a disc spring (13) are respectively arranged in the stepped groove (11); the butt joint of the valve body (2) is provided with an assembly cavity (21), the butt joint of the valve seat body (1) is placed in the assembly cavity (21), and the valve seat body (1) is fastened to the valve body (2) by bolts, the disc spring (13) is located between the joint surfaces of the valve seat body (1) and the valve body (2); the butt joint of the valve seat body (1) is provided with a purge port (14), and the end of the purge port (14) is threadedly connected with a sealing plug (15); a valve core (22) is arranged in the valve body (2), and a valve stem (23) is connected to the valve core (22), and the tail end of the valve stem (23) extends outside the valve body (2).

2. The coal lock lower valve seat that is easy to disassemble and maintain according to claim 1 is characterized in that: A second sealing ring (24) is arranged in the valve body (2), and the second sealing ring (24) and the first sealing ring (12) are respectively located on two sides of the valve core (22).

3. The coal lock lower valve seat that is easy to disassemble and maintain according to claim 1 is characterized in that: An axial hole (25) is provided at the top of the valve body (2), and the tail end of the valve stem (23) extends outward from the axial hole (25).

4. The coal lock lower valve seat that is easy to disassemble and maintain according to claim 3 is characterized in that: A shaft sleeve (26) is disposed in the shaft hole (25), and the shaft sleeve (26) is movably sleeved with the valve stem (23).

5. The coal lock lower valve seat that is easy to disassemble and maintain according to claim 3 is characterized in that: A mechanical seal (27) is disposed in the shaft hole (25), and the mechanical seal (27) is sleeved with the valve stem (23).

6. The coal lock lower valve seat that is easy to disassemble and maintain according to claim 5 is characterized in that: A valve cover (28) is clamped on the top of the mechanical seal (27), and the valve cover (28) is fixed to the valve body (2) by bolts.

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