High-temperature gate valve

Abstract

The utility model relates to the technical field of calcium carbide industry, in particular to a high-temperature gate valve which comprises a gate valve body, the gate valve body comprises a high-temperature-resistant upper valve body and a high-temperature-resistant lower valve body, and the high-temperature-resistant upper valve body and the high-temperature-resistant lower valve body are fixedly connected. A sealing cavity is formed in the high-temperature-resistant upper valve body, a valve shaft is arranged in the sealing cavity, a driving device is fixed to the high-temperature-resistant upper valve body, and the first end of the valve shaft is connected to the output end of the driving device. A valve hole is formed in the high-temperature-resistant lower valve body, a valve plate is movably arranged in the valve body, the first end of the valve plate extends into the sealing cavity and is connected to the second end of the valve shaft, and the second end of the valve plate corresponds to the valve hole; and the driving device is used for driving the valve shaft to drive the valve plate to lift, so that the valve plate opens or closes the valve hole. The valve shaft is arranged in the sealing cavity in the high-temperature-resistant upper valve body, so that the valve shaft is protected, smooth operation of the valve plate can be guaranteed, and the service life of the gate valve is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of calcium carbide industry, and particularly refers to a high-temperature slide valve. Background Art

[0002] The high-temperature slide valve used in the calcium carbide industry is mainly used in production. Since the materials are particles and dust, and the working temperature is usually above 800°C. Due to the high working temperature, it is easy to reduce its sealing level, resulting in the leakage of toxic gases such as H2, CO, CO2, CH4, C2H6, C2H4, N2, etc. mixed by high-temperature materials, which may cause danger. In addition, it is easy to cause the operation of the valve to be blocked or even unable to move, thus greatly shortening the service life of the high-temperature slide valve.

[0003] For example, the Chinese utility model patent with the patent publication number CN202209437U discloses an intelligent electric high-temperature slide valve, which includes two parts: a high-temperature resistant upper valve body and a high-temperature resistant lower valve body. The high-temperature resistant lower valve body is provided with a valve plate. The high-temperature resistant upper valve body is provided with two pull rods connected to the valve plate. A gear is arranged outside each pull rod, and the gears of each pull rod are used in cooperation with a worm gear mechanism. An intelligent electric actuator is also arranged on the high-temperature resistant upper valve body, and the intelligent electric actuator is respectively connected to the worm gear mechanisms on both sides. This prior art drives the worm gear mechanisms on both sides to act through the intelligent electric actuator, and then the worm gear mechanisms on both sides drive the gears outside the two pull rods to act, so as to realize the lifting of the valve plate. However, the transmission structure composed of pull rods, gears, and worm gear mechanisms in this prior art is relatively complex, the assembly is more cumbersome, the equipment cost and the assembly labor cost are relatively high, and the transmission structure does not adopt corresponding protection devices, so it is easy to be damaged and easy to cause the operation of the valve plate to be blocked or even unable to move.

[0004] Therefore, there is still room for improvement and development in the prior art. Summary of the Utility Model

[0005] In order to solve the problems of the prior art, the utility model provides a high-temperature slide valve, which has a simple structure, reasonable design, and a long service life.

[0006] In order to achieve the above purpose, the technical scheme applied by the utility model is as follows:

[0007] A high-temperature slide gate valve, comprising a slide gate valve body, the slide gate valve body includes a high-temperature resistant upper valve body and a high-temperature resistant lower valve body, and the high-temperature resistant upper valve body and the high-temperature resistant lower valve body are fixedly connected; a sealing cavity is formed in the high-temperature resistant upper valve body, a valve shaft is arranged in the sealing cavity, a driving device is fixed on the high-temperature resistant upper valve body, and the first end of the valve shaft is connected to the output end of the driving device; a valve hole is arranged on the high-temperature resistant lower valve body, a valve plate is movably arranged in the valve body, the first end of the valve plate extends into the sealing cavity and is connected to the second end of the valve shaft, and the second end of the valve plate is arranged corresponding to the valve hole; the driving device is used to drive the valve shaft to drive the valve plate to lift, so that the valve plate opens or closes the valve hole.

[0008] According to the above solution, a slot for the valve plate to pass through is arranged on the high-temperature resistant upper valve body, a high-temperature resistant sealing assembly is arranged in the high-temperature resistant upper valve body, the high-temperature resistant sealing assembly is arranged corresponding to the slot, and the first end of the valve plate passes through the slot and the high-temperature resistant sealing assembly in sequence and then is connected to the second end of the valve shaft.

[0009] According to the above solution, the high-temperature resistant sealing assembly includes a stuffing box, high-temperature resistant graphite or ceramic fiber packing, and a stuffing gland. The first end of the stuffing box is fixed in the high-temperature resistant upper valve body, a filling cavity is arranged in the stuffing box, and the filling cavity is filled with high-temperature resistant graphite or ceramic fiber packing. The second end of the stuffing box is fixed with a stuffing gland, and the stuffing gland is used to position the high-temperature resistant graphite or ceramic fiber packing in the filling cavity; the first end of the valve plate passes through the slot, the high-temperature resistant graphite or ceramic fiber packing, and the stuffing gland in sequence and then is connected to the second end of the valve shaft.

[0010] According to the above solution, a valve seat and a sealing press block are arranged in the high-temperature resistant lower valve body, a guiding chute is formed between the valve seat and the sealing press block, and the second end of the valve plate is slidably arranged in the guiding chute.

[0011] According to the above solution, a wedge block is arranged on the first side of the valve plate close to the valve seat, a wedge groove complementary to the wedge block is arranged on the valve seat, and the wedge block is slidably arranged in the wedge groove; the second side of the valve plate close to the sealing press block is a load-bearing surface.

[0012] According to the above solution, the high-temperature resistant upper valve body includes a shell and a cover plate, the shell and the cover plate are fixedly connected, a sealing cavity is formed between the shell and the cover plate, the valve shaft is movably arranged in the sealing cavity, and the first end of the valve shaft passes through the shell and is connected to the output end of the driving device.

[0013] According to the above solution, a connection head fixedly connected to the valve plate is arranged at the second end of the valve shaft, and a mounting hole fixedly connected to the connection head is arranged on the valve plate.

[0014] According to the above solution, the driving device is fixed on the high-temperature resistant upper valve body through a bracket; the driving device is an electric multi-turn actuator for driving the valve shaft to rotate forward and backward, or an electro-hydraulic push rod actuator for driving the valve shaft to lift, or a pneumatic piston actuator for driving the valve shaft to lift.

[0015] According to the above solution, a cooling device is provided on the high-temperature resistant upper valve body.

[0016] Advantages of the present utility model:

[0017] With such a setting of the present utility model, by using the valve shaft as the transmission structure between the driving device and the valve plate, the structure is simple, the assembly is convenient, and the cost is low; and the valve shaft is arranged in the sealed cavity of the high-temperature resistant upper valve body, playing a role of being protected, which can ensure the smooth operation of the valve plate and greatly extend the service life of the plug valve. Description of the drawings

[0018] Figure 1 is a schematic diagram of the high-temperature plug valve of the present utility model;

[0019] Figure 2 is the internal structure diagram of the high-temperature plug valve of the present utility model;

[0020] Figure 3 is Figure 2 the enlarged view of position A in

[0021] Figure 4 is Figure 2 the sectional view of position B-B in

[0022] Figure 5 is the schematic diagram of the valve plate of the present utility model.

[0023] In the figure:

[0024] 1. High-temperature resistant upper valve body; 11. Shell; 12. Cover plate; 13. Sealed cavity; 2. High-temperature resistant lower valve body; 21. Valve hole; 3. Valve shaft; 4. Valve plate; 41. Mounting hole; 42. Wedge block; 5. High-temperature resistant sealing assembly; 51. Stuffing box; 52. High-temperature resistant graphite or ceramic fiber packing; 53. Packing gland; 6. Connector; 7. Valve seat; 71. Wedge groove; 8. Sealing block; 9. Driving device; 91. Bracket. Specific embodiments

[0025] The technical solution of the present utility model will be described below in conjunction with the drawings and embodiments.

[0026] As Figures 1 to 5As shown in the figure, the high-temperature knife gate valve of the present utility model includes a knife gate valve body, and the knife gate valve body includes a high-temperature resistant upper valve body 1 and a high-temperature resistant lower valve body 2. The bottom of the high-temperature resistant upper valve body 1 is fixedly connected to the top of the high-temperature resistant lower valve body 2. A sealing cavity 13 is formed inside the high-temperature resistant upper valve body 1. A valve shaft 3 is arranged inside the sealing cavity 13. A driving device 9 is fixed on the high-temperature resistant upper valve body 1. The first end of the valve shaft 3 is connected to the output end of the driving device 9. A valve hole 21 is arranged on the high-temperature resistant lower valve body 2. A valve plate 4 is movably arranged inside the valve body 2. The first end of the valve plate 4 extends into the sealing cavity 13 and is connected to the second end of the valve shaft 3. The second end of the valve plate 4 is arranged corresponding to the valve hole 21. The driving device 9 is used to drive the valve shaft 3 to drive the valve plate 4 to lift, so that the valve plate 4 opens or closes the valve hole 21. With such a setting, by using the valve shaft 3 as the transmission structure between the driving device 9 and the valve plate 4, the structure is simple, the assembly is convenient, and the cost is low. Moreover, the valve shaft 3 is arranged in the sealing cavity 13 inside the high-temperature resistant upper valve body 1, playing a role of being protected, which can ensure the smooth operation of the valve plate 4 and greatly extend the service life of the knife gate valve.

[0027] Preferably, both the high-temperature resistant upper valve body 1 and the high-temperature resistant lower valve body 2 are made of 310S austenitic chromium-nickel stainless steel, and the high-temperature resistant upper valve body 1 and the high-temperature resistant lower valve body 2 are welded and fixed by a high-temperature resistant material. Its unique properties of oxidation resistance, corrosion resistance, and high-temperature resistance enable continuous operation under harsh working conditions such as high dust and high temperature, greatly improving the service life of the valve body.

[0028] In this embodiment, a slot for the valve plate 4 to pass through is arranged at the bottom of the high-temperature resistant upper valve body 1. A high-temperature resistant sealing component 5 is arranged inside the high-temperature resistant upper valve body 1. The high-temperature resistant sealing component 5 is arranged corresponding to the slot. The first end of the valve plate 4 passes through the slot and the high-temperature resistant sealing component 5 in sequence and is then connected to the second end of the valve shaft 3. With such a setting, the high-temperature resistant sealing component 5 can prevent toxic gases such as H2, CO, CO2, CH4, C2H6, C2H4, N2, etc. generated by high-temperature materials from entering the sealing cavity 13, corroding the valve shaft 3, causing the operation of the valve plate 4 to be blocked, or even unable to move. More specifically, it can ensure the smooth operation of the valve plate 4 and greatly extend the service life of the knife gate valve.

[0029] In this embodiment, the high-temperature resistant sealing assembly 5 includes a stuffing box 51, high-temperature resistant graphite or ceramic fiber packing 52, and a stuffing gland 53. The first end of the stuffing box 51 is fixed inside the high-temperature resistant upper valve body 1. A filling cavity is provided inside the stuffing box 51, and the filling cavity is filled with high-temperature resistant graphite or ceramic fiber packing 52. The second end of the stuffing box 51 is fixed with a stuffing gland 53, and the stuffing gland 53 is used to position the high-temperature resistant graphite or ceramic fiber packing 52 in the filling cavity. The first end of the valve plate 4 sequentially passes through the slot, the high-temperature resistant graphite or ceramic fiber packing 52, and the stuffing gland 53 and is then connected to the second end of the valve shaft 3. With such a setting, the sealing assembly 5 composed of the stuffing box 51, the high-temperature resistant graphite or ceramic fiber packing 52, and the stuffing gland 53 has the advantages of good sealing performance, oxidation resistance, corrosion resistance, high temperature resistance, and long service life.

[0030] In this embodiment, a valve seat 7 and a sealing block 8 are provided inside the high-temperature resistant lower valve body 2. A guiding chute is formed between the valve seat 7 and the sealing block 8, and the second end of the valve plate 4 is slidably disposed in the guiding chute. With such a setting, the guiding chute plays a guiding role when the valve shaft 3 drives the valve plate 4 to move up and down.

[0031] In this embodiment, a wedge block 42 is provided on the first side of the valve plate 4 close to the valve seat 7, and a wedge groove 71 complementary to the wedge block 42 is provided on the valve seat 7. The wedge block 42 is slidably disposed in the wedge groove 71. The second side of the valve plate 4 close to the sealing block 8 is a load-bearing surface. With such a setting, it can enhance the sealing performance between the valve plate 4 and the valve seat 7 due to the gravity generated by the material when the valve plate 4 is loaded, and it can also prevent the material dust from staying on the sealing surface, so that the valve plate 4 will not deviate or jam during the movement process.

[0032] In this embodiment, the high-temperature resistant upper valve body 1 includes a housing 11 and a cover plate 12. The housing 11 and the cover plate 12 are fixedly connected, and a sealing cavity 13 is formed between the housing 11 and the cover plate 12. The valve shaft 3 is movably disposed in the sealing cavity 13, and the first end of the valve shaft 3 passes through the housing 11 and is connected to the output end of the driving device 9. With such a setting, its structure is simple and the assembly is convenient. Moreover, it can prevent the toxic gases mixed with H2, CO, CO2, CH4, C2H6, C2H4, N2, etc. generated by the high-temperature materials from entering the sealing cavity 13.

[0033] In this embodiment, a connection head 6 fixedly connected to the valve plate 4 is provided at the second end of the valve shaft 3, and a mounting hole 41 fixedly connected to the connection head 6 is provided on the valve plate 4. With such a setting, its structure is simple and the assembly is convenient.

[0034] In this embodiment, the driving device 9 is fixed to the top of the high-temperature resistant upper valve body 1 through a bracket 91; the driving device 9 is an electric multi-turn actuator for driving the valve shaft 3 to rotate forward and backward, or an electro-hydraulic push rod actuator for driving the valve shaft 3 to lift and lower, or a pneumatic piston actuator for driving the valve shaft 3 to lift and lower. With such a setting, when the driving device 9 is an electric multi-turn actuator for driving the valve shaft 3 to rotate forward and backward, the valve shaft 3 is preferably a screw or a worm, which is threadedly connected to the connecting head 6. The forward and backward rotation of the valve shaft 3 causes the connecting head 6 to move up and down along the valve shaft 3, thereby driving the valve plate 4 to lift and lower; when the driving device 9 is an electro-hydraulic push rod actuator for driving the valve shaft 3 to lift and lower, the valve shaft 3 is preferably a push rod, which is fixedly connected to the connecting head 6. The telescopic movement of the valve shaft 3 drives the connecting head 6 to drive the valve plate 4 to lift and lower; when the driving device 9 is a pneumatic piston actuator for driving the valve shaft 3 to lift and lower, the valve shaft 3 is preferably a piston rod, which is fixedly connected to the connecting head 6. The telescopic movement of the valve shaft 3 drives the connecting head 6 to drive the valve plate 4 to lift and lower.

[0035] It should be noted that fixing the driving device 9 to the top of the high-temperature resistant upper valve body 1, away from the heat source of the high-temperature resistant lower valve body 2, it is less affected by heat and has a longer service life.

[0036] In this embodiment, a cooling device is provided on the high-temperature resistant upper valve body 1. With such a setting, the heat in the sealing cavity 13 can be dissipated through the cooling device, further protecting the valve shaft 3.

[0037] The embodiments of the present invention have been described above in conjunction with the accompanying drawings. However, the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many forms without departing from the purpose of the present invention and the scope protected by the claims. All of these are within the protection scope of the present invention.

Claims

1. A high-temperature slide gate valve, comprising a slide gate valve body, characterized in that: The slide gate valve body includes a high-temperature resistant upper valve body and a high-temperature resistant lower valve body, and the high-temperature resistant upper valve body and the high-temperature resistant lower valve body are fixedly connected; A sealing cavity is formed in the high-temperature resistant upper valve body, a valve shaft is arranged in the sealing cavity, a driving device is fixed on the high-temperature resistant upper valve body, and the first end of the valve shaft is connected to the output end of the driving device; A valve hole is provided on the high-temperature resistant lower valve body, a valve plate is movably arranged in the valve body, the first end of the valve plate extends into the sealing cavity and is connected to the second end of the valve shaft, and the second end of the valve plate is arranged corresponding to the valve hole; The driving device is used to drive the valve shaft to drive the valve plate to lift, so that the valve plate opens or closes the valve hole.

2. The high-temperature slide gate valve according to claim 1, characterized in that: A slot for the valve plate to pass through is provided on the high-temperature resistant upper valve body, a high-temperature resistant sealing assembly is arranged in the high-temperature resistant upper valve body, the high-temperature resistant sealing assembly is arranged corresponding to the slot, and the first end of the valve plate passes through the slot and the high-temperature resistant sealing assembly in sequence and then is connected to the second end of the valve shaft.

3. The high-temperature plug valve according to claim 2, characterized in that: The high-temperature resistant sealing assembly includes a stuffing box, high-temperature resistant graphite or ceramic fiber packing, and a packing gland. The first end of the stuffing box is fixed in the high-temperature resistant upper valve body, a filling cavity is arranged in the stuffing box, the filling cavity is filled with high-temperature resistant graphite or ceramic fiber packing, and a packing gland is fixed at the second end of the stuffing box. The packing gland is used to position the high-temperature resistant graphite or ceramic fiber packing in the filling cavity; the first end of the valve plate passes through the slot, the high-temperature resistant graphite or ceramic fiber packing, and the packing gland in sequence and then is connected to the second end of the valve shaft.

4. The high-temperature plug valve according to claim 1, characterized in that: A valve seat and a sealing block are arranged in the high-temperature resistant lower valve body, a guiding chute is formed between the valve seat and the sealing block, and the second end of the valve plate is slidably arranged in the guiding chute.

5. The high-temperature slide gate valve according to claim 4, characterized in that: A wedge block is arranged on the first side of the valve plate close to the valve seat, a wedge groove complementary to the wedge block is arranged on the valve seat, and the wedge block is slidably arranged in the wedge groove; the second side of the valve plate close to the sealing block is a load bearing surface.

6. The high-temperature slide gate valve according to claim 1, wherein: The high-temperature resistant upper valve body includes a shell and a cover plate, the shell and the cover plate are fixedly connected, a sealing cavity is formed between the shell and the cover plate, the valve shaft is movably arranged in the sealing cavity, and the first end of the valve shaft passes through the shell and is connected to the output end of the driving device.

7. The high-temperature plug valve according to claim 6, wherein: A connecting head fixedly connected to the valve plate is arranged at the second end of the valve shaft, and a mounting hole fixedly connected to the connecting head is arranged on the valve plate.

8. The high-temperature slide gate valve according to claim 6, characterized in that: The driving device is fixed on the high-temperature resistant upper valve body through a bracket; the driving device is an electric multi-turn actuator for driving the valve shaft to rotate forward and backward, or an electro-hydraulic push rod actuator for driving the valve shaft to lift, or a pneumatic piston actuator for driving the valve shaft to lift.

9. The high-temperature slide gate valve according to claim 1, characterized in that: A cooling device is arranged on the high-temperature resistant upper valve body.

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