Gate valve for high-temperature gas transmission pipeline

Abstract

The invention discloses a gate valve for a high-temperature gas transmission pipeline, and relates to the technical field of valves. Comprising a main pipe and a connecting pipe, a fixing frame is fixedly arranged on the outer wall of the connecting pipe, a machine base is fixedly arranged on the outer wall of the top of the fixing frame, and a driving motor is fixedly arranged on the outer wall of the top of the machine base. A driving motor is arranged at the top of a fixed frame, the driving motor is started to drive a gear at a speed reducer to rotate, a rack meshed with the gear is driven by the driving motor to move upwards or downwards, a sealing insertion plate is arranged on the outer wall of the rack, and sealing grooves are formed in the outer wall of a connecting pipe and the inner wall of an isolating layer. A plate groove is formed in the bottom of the inner wall of the fixing frame, the sealing groove and the sealing insertion plate are embedded, the plate groove and the sealing insertion plate are embedded, the sealing groove and the plate groove are both communicated with the interior of the pipeline, the sealing insertion plate slides up and down in the plate groove and the sealing groove under driving of a driving motor, and the arranged sealing insertion plate is used for controlling the flow and the flow direction in the pipeline.

Description

Technical Field

[0001] The present invention relates to the field of valve technology, and in particular to a plug-in valve for a high-temperature gas transmission pipeline. Background Art

[0002] The gate valve is the main control equipment, which is often used in metallurgy, mining, building materials, food, and sewage pipes with more impurities or larger particles in the air duct, especially in environmental protection treatment pipes. The gate valve has a wide range of applications. According to different materials and different applied media, the material and shape of this equipment can be changed. Its scope of use has expanded from ordinary fields to a wider range of industries. At present, the gate valves on the market are ordinary non-temperature resistant valves. When high-temperature gas needs to be transmitted, this ordinary temperature gate valve will cause many problems, such as heat loss, valve body deformation, and deterioration of the temperature environment in the production workshop.

[0003] After searching, the publication number is: CN111102369A, which is a closed electric plug-in valve. The invention discloses a closed electric plug-in valve belonging to the field of valve technology, including a valve cavity, the top of the valve cavity is fixedly connected to the bottom of the top plate by bolts, the top wall of the top plate is screwed with a first motor, the output shaft of the first motor is fixedly connected to the top of the first screw rod, the outer wall of the first screw rod is screwed with the inner wall of the threaded sleeve, the front side wall of the threaded sleeve is welded to the top of the rear wall of the valve plate, the left and right side walls of the valve plate are respectively horizontally opened with a first fixed socket and a second fixed socket, the left and right side walls of the valve cavity are respectively fixedly connected with a second motor and a third motor, the output shaft of the second motor is fixedly connected to the second screw rod, the outer wall of the second screw rod is screwed with the inner cavity of the first fixed plug block, the output shaft of the third motor is fixedly connected to the third screw rod, and the outer wall of the third screw rod is screwed with the inner cavity of the second fixed plug block. The present invention provides a more secure fixation for the valve plate, reducing the influence of pipeline vibration on the connection strength between the plug plate and the motor.

[0004] In the above scheme, the inside of the pipeline is sealed by a motor-driven valve, and then the valve plate is limited by setting motors on both sides of the pipeline. The valve manufacturing is relatively complicated, and it only considers the sealing of the inside of the pipeline. It does not take into account that in a high-temperature gas transmission environment, the pipeline is prone to heat loss. In addition, under long-term high-temperature transmission, the valve body is prone to deformation. In addition, the continuous transmission of high-temperature gas is likely to cause the temperature of the production workshop to continue to rise, resulting in a poor working environment in the production workshop. Summary of the invention

[0005] The object of the present invention is to provide a gate valve for a high-temperature gas transmission pipeline, which solves the technical problems raised in the background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a gate valve for a high-temperature gas transmission pipeline, comprising a main pipe and a connecting pipe, the outer wall of the connecting pipe is fixedly provided with a fixed frame, the top outer wall of the fixed frame is fixedly provided with a base, the top outer wall of the base is fixedly provided with a driving motor, the output end of the driving motor is fixedly provided with a reducer, the output end of the reducer is fixedly provided with a connecting shaft, the outer wall of the connecting shaft is fixedly provided with a gear, the bottom of the inner wall of the fixed frame is provided with a plate groove, the top outer wall of the fixed frame is provided with a through hole, the inner wall of the through hole is slidably plugged with a rack, and the bottom outer wall of the rack is fixedly provided with a sealing gate.

[0007] Preferably, a limiting device is fixedly provided on the top outer wall of the fixed frame, and the limiting device includes a connecting frame and an adjusting frame. A fixing plate is fixedly provided on the top outer wall of the fixed frame, and the connecting frame is located above the fixing plate. Two bolt holes are provided on the outer wall of one side of the connecting frame, and adjusting bolts are inserted into the inner walls of the two bolt holes. Limiting rings are fixedly provided on the outer walls of one end of the two adjusting bolts close to the adjusting frame, and two limiting caps are fixedly provided on the outer wall of one side of the adjusting frame close to the connecting frame. Limiting grooves are provided on the outer walls of the two limiting caps, and the limiting rings are engaged with the limiting grooves. Two fixed shafts are fixedly provided on the inner wall of the adjusting frame, and pressure wheels are rotatably provided on the outer walls of the two fixed shafts.

[0008] Preferably, an isolation layer is fixedly provided on the inner walls of the main pipe and the connecting pipe, an annular cavity is formed between the isolation layer, the main pipe and the connecting pipe, and the isolation layer is made of SUS310 material.

[0009] Preferably, a second cooling air inlet pipe is fixedly provided on the outer wall of the connecting pipe, and the second cooling air inlet pipe extends into the annular cavity. A first cooling air inlet pipe is fixedly provided on the outer wall of the main pipe, and the first cooling air inlet pipe extends into the annular cavity.

[0010] Preferably, a sealing groove and a plurality of air outlet holes are provided on the inner wall of the isolation layer, and the sealing groove is communicated with the plate groove.

[0011] Preferably, two sealing brushes are fixedly provided at the bottom of the inner wall of the fixed frame, and the two sealing brushes are respectively located at two sides of the plate groove.

[0012] Preferably, the rack extends into the interior of the fixed frame, and the rack is meshed with the gear.

[0013] Preferably, the sealing plug plate is located inside the fixed frame, the sealing plug plate is plugged into the plate groove, the lower half of the sealing plug plate is semicircular, the sealing plug plate is adapted to the inner wall of the connecting pipe, and the sealing plug plate is used to seal the inner wall of the connecting pipe.

[0014] Preferably, the sealing plug plate is plugged into the sealing groove.

[0015] Preferably, the clamping wheel is close to the rack, and the bottom outer wall of the adjustment frame is slidably connected to the top outer wall of the fixed frame.

[0016] Compared with the related art, the gate valve for high-temperature gas transmission pipeline provided by the present invention has the following beneficial effects: 1. The present invention provides a gate valve for a high-temperature gas transmission pipeline, wherein a driving motor is arranged on the top of a fixed frame, the driving motor is started to drive the gear at the reducer to rotate, and the rack meshing with the gear moves upward or downward under the drive of the driving motor, a sealing gate is arranged on the outer wall of the rack, a sealing groove is provided on the outer wall of the connecting pipe and the inner wall of the isolation layer, a plate groove is provided on the bottom of the inner wall of the fixed frame, the sealing groove is engaged with the sealing gate, the plate groove is engaged with the sealing gate, the sealing groove and the plate groove are both connected with the inside of the pipeline, the sealing gate slides up and down inside the plate groove and the sealing groove under the drive of the driving motor, and the provided sealing gate is used for flow control and flow direction control inside the pipeline.

[0017] 2. The present invention provides a gate valve for a high-temperature gas transmission pipeline, in which an isolation layer is provided on the inner walls of a connecting pipe and a main pipe, and an annular cavity is formed between the isolation layer, the connecting pipe and the main pipe. The isolation layer is an isolation layer made of SUS310 material wrapped around the transmission pipeline to wrap the high-temperature pipeline, and a first cooling air inlet pipe is provided outwardly on the outer wall of the main pipe, and a second cooling air inlet pipe is fixedly provided on the outer wall of the connecting pipe. A separate hair dryer is used to blow air into the annular cavity. After the wind enters the annular cavity, it flows along the inner high-temperature pipeline at a high speed in a spiral state, and enters the high-temperature pipeline through a small hole opened on the inner wall of the isolation layer after rotating 360 degrees. Because the external fan continuously blows air into the isolation layer, the inner high-temperature pipeline is isolated from the outside by the isolation layer to prevent the loss of high temperature. At the same time, the external fan blows air to the inner high-temperature pipeline and then rotates for one circle to enter the high-temperature pipeline, so that the high-temperature gas does not lose to the outside, thereby achieving the purpose of heat preservation.

[0018] 3. The present invention provides a gate valve for a high-temperature gas transmission pipeline. When the driving motor is started to drive the sealing gate to seal or open the inside of the pipeline, the adjusting bolt arranged on the outer wall of the connecting frame is turned. During the rotation of the adjusting bolt, the adjusting frame is driven to approach the rack. The clamping wheel inside the adjusting frame is in full contact with the rack, thereby increasing the friction between the rack and the clamping wheel, limiting the rack, and ensuring the stability of the rack. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the air outlet of the present invention; Figure 3 It is an exploded view of a part of the structure of the fixed frame of the present invention; Figure 4 This is a partial structural cross-sectional view of the main pipe of the present invention; Figure 5 This is a schematic diagram of the structure of the connection frame of the present invention; Figure 6 It is an exploded view of the connection frame of the present invention; Figure 7 For the present invention Figure 3 A magnified view of the structure at center; Figure 8 For the present invention Figure 4 A magnified view of the structure at B in the middle; Fig. 9 For the present invention Figure 6 Enlarged view of the structure at point C in the middle.

[0020] In the figure: 1. main pipe; 101. first cooling air inlet pipe; 2. connecting pipe; 201. sealing groove; 202. air outlet hole; 203. second cooling air inlet pipe; 3. fixed frame; 301. plate groove; 302. through hole; 303. sealing brush; 4. machine base; 5. driving motor; 6. reducer; 7. connecting shaft; 8. gear; 9. rack; 10. sealing plug plate; 11. fixing plate; 12. connecting frame; 13. bolt hole; 14. adjusting bolt; 15. limiting ring; 16. adjusting frame; 17. limiting cap; 18. limiting groove; 19. fixing shaft; 20. clamping wheel; 21. annular cavity. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] Embodiment 1:

[0023] See also Figure 1-Figure 9The present invention provides a technical solution: a gate valve for a high-temperature gas transmission pipeline, comprising a main pipe 1 and a connecting pipe 2, a fixing frame 3 is fixedly arranged on the outer wall of the connecting pipe 2, a base 4 is fixedly arranged on the top outer wall of the fixing frame 3, a driving motor 5 is fixedly arranged on the top outer wall of the base 4, a reducer 6 is fixedly arranged on the output end of the driving motor 5, a connecting shaft 7 is fixedly arranged on the output end of the reducer 6, a gear 8 is fixedly arranged on the outer wall of the connecting shaft 7, a plate groove 301 is opened at the bottom of the inner wall of the fixing frame 3, a through hole 302 is opened on the top outer wall of the fixing frame 3, a rack 9 is slidably inserted into the inner wall of the through hole 302, and a close-fitting gear 8 is fixedly arranged on the bottom outer wall of the rack 9 The sealing plug plate 10 and the top outer wall of the fixed frame 3 are fixedly provided with a limiting device, the limiting device includes a connecting frame 12 and an adjusting frame 16, the top outer wall of the fixed frame 3 is fixedly provided with a fixing plate 11, the connecting frame 12 is located above the fixing plate 11, one side outer wall of the connecting frame 12 is provided with two bolt holes 13, the inner walls of the two bolt holes 13 are plugged with adjusting bolts 14, the outer walls of the two adjusting bolts 14 near one end of the adjusting frame 16 are fixedly provided with a limiting ring 15, the outer wall of the adjusting frame 16 near one side of the connecting frame 12 is fixedly provided with two limiting caps 17, the outer walls of the two limiting caps 17 are provided with limiting grooves 18, the limiting rings 15 are embedded with the limiting grooves 18, and the adjusting Two fixed shafts 19 are fixedly provided on the inner wall of the segment frame 16, and the outer walls of the two fixed shafts 19 are rotatably provided with a clamping wheel 20. The inner walls of the main pipe 1 and the connecting pipe 2 are fixedly provided with an isolation layer, and an annular cavity 21 is formed between the isolation layer and the main pipe 1 and the connecting pipe 2. The isolation layer is made of SUS310 material. A second cooling air inlet pipe 203 is fixedly provided on the outer wall of the connecting pipe 2, and the second cooling air inlet pipe 203 extends to the inside of the annular cavity 21. A first cooling air inlet pipe 101 is fixedly provided on the outer wall of the main pipe 1, and the first cooling air inlet pipe 101 extends to the inside of the annular cavity 21. A sealing groove 201 and a plurality of air outlet holes 202 are opened on the inner wall of the isolation layer. The sealing groove 201 is connected with the plate groove 301, and two sealing brushes 303 are fixedly arranged at the bottom of the inner wall of the fixed frame 3. The two sealing brushes 303 are respectively located on both sides of the plate groove 301. The rack 9 extends into the fixed frame 3, and the rack 9 is meshed with the gear 8. The sealing plug plate 10 is located inside the fixed frame 3, and the sealing plug plate 10 is plugged into the plate groove 301. The lower half of the sealing plug plate 10 is semicircular, and the sealing plug plate 10 is adapted to the inner wall of the connecting pipe 2. The sealing plug plate 10 is used to seal the inner wall of the connecting pipe 2. The sealing plug plate 10 is plugged into the sealing groove 201, and the clamping wheel 20 is close to the rack 9. The bottom outer wall of the adjustment frame 16 is slidably connected to the top outer wall of the fixed frame 3.

[0024] In this embodiment, a driving motor 5 is arranged on the top of the fixed frame 3, and the driving motor 5 is started to drive the gear 8 at the reducer 6 to rotate. The rack 9 meshing with the gear 8 moves upward or downward under the drive of the driving motor 5, and a sealing plug plate 10 is arranged on the outer wall of the rack 9. A sealing groove 201 is provided on the outer wall of the connecting pipe 2 and the inner wall of the isolation layer, and a plate groove 301 is provided on the bottom of the inner wall of the fixed frame 3. The sealing groove 201 is engaged with the sealing plug plate 10, and the plate groove 301 is engaged with the sealing plug plate 10. The sealing groove 201 and the plate groove 301 are both connected to the inner wall of the pipeline. The sealing plug plate 10 is driven by the driving motor 5 to slide up and down inside the plate groove 301 and the sealing groove 201. The sealing plug plate 10 is used for flow control and flow direction control inside the pipeline. An isolation layer is provided on the inner wall of the connecting pipe 2 and the main pipe 1. An annular cavity 21 is formed between the isolation layer and the connecting pipe 2 and the main pipe 1. The isolation layer is an isolation layer made of SUS310 material wrapped around the conveying pipe to wrap the high-temperature pipe. A first cooling air inlet pipe 101 is provided outwardly on the outer wall of the main pipe 1, and a second cooling air inlet pipe is fixedly provided on the outer wall of the connecting pipe 2. 203, a separate blower is used to blow air into the annular cavity 21. After the air enters the annular cavity 21, it flows along the inner high-temperature pipe in a spiral state at high speed, and enters the high-temperature pipe through the small hole on the inner wall of the isolation layer after rotating 360 degrees. Because the external blower continuously blows air into the isolation layer, the inner high-temperature pipe is isolated from the outside by the isolation layer to prevent the loss of high temperature. At the same time, the external blower blows air into the inner high-temperature pipe and then rotates one circle to enter the high-temperature pipe, so that the high-temperature gas does not lose to the outside, thereby achieving the purpose of heat preservation. By arranging a connecting frame 12 and an adjusting frame 16 on the top of the fixed frame 3, Two fixed shafts 19 are arranged on the inner wall of the adjusting frame 16, and clamping wheels 20 are rotatably arranged on the outer walls of the two fixed shafts 19, and the clamping wheel 20 is close to the rack 9. When the driving motor 5 is started to drive the sealing plug plate 10 to seal or open the inside of the pipeline, the adjusting bolt 14 arranged on the outer wall of the connecting frame 12 is turned. During the rotation of the adjusting bolt 14, the adjusting frame 16 is driven to approach the rack 9, and the clamping wheel 20 inside the adjusting frame 16 is completely in contact with the rack 9, thereby increasing the friction between the rack 9 and the clamping wheel 20, limiting the rack 9, and ensuring the stability of the rack 9.

[0025] Working principle: A driving motor 5 is arranged on the top of the fixed frame 3, and the driving motor 5 is started to drive the gear 8 at the reducer 6 to rotate. The rack 9 meshing with the gear 8 moves upward or downward under the drive of the driving motor 5. A sealing plug plate 10 is arranged on the outer wall of the rack 9. A sealing groove 201 is provided on the outer wall of the connecting pipe 2 and the inner wall of the isolation layer. A plate groove 301 is provided on the bottom of the inner wall of the fixed frame 3. The sealing groove 201 is engaged with the sealing plug plate 10, and the plate groove 301 is engaged with the sealing plug plate 10. The sealing groove 201 and the plate groove 301 are both connected to the inside of the pipeline. The sealing plug plate 10 is driven by the driving motor 5 in the plate groove 301 and the sealing plug plate 10. The inside of the groove 201 slides up and down, and the sealing plug plate 10 is used for flow control and flow direction control inside the pipeline. An isolation layer is provided on the inner wall of the connecting pipe 2 and the main pipe 1, and an annular cavity 21 is formed between the isolation layer and the connecting pipe 2 and the main pipe 1. The isolation layer is an isolation layer made of SUS310 material wrapped around the conveying pipeline, wrapping the high-temperature pipeline, and a first cooling air inlet pipe 101 is provided outwardly on the outer wall of the main pipe 1, and a second cooling air inlet pipe 203 is fixedly provided on the outer wall of the connecting pipe 2. A separate hair dryer is used to blow air into the annular cavity 21. After the air enters the annular cavity 21, it flows along the inner high-temperature pipeline in a spiral state at high speed and rotates 360 degrees. After the temperature reaches a certain level, the air enters the high-temperature pipe through the small hole on the inner wall of the isolation layer. Because the external fan continuously blows air into the isolation layer, the internal high-temperature pipe is isolated from the outside by the isolation layer to prevent the loss of high temperature. At the same time, the external fan blows air to the internal high-temperature pipe and then rotates for a circle to enter the high-temperature pipe, so that the high-temperature gas does not lose to the outside, thereby achieving the purpose of heat preservation. A connecting frame 12 and an adjusting frame 16 are arranged on the top of the fixed frame 3, two fixed shafts 19 are arranged on the inner wall of the adjusting frame 16, and pressure wheels 20 are rotatably arranged on the outer walls of the two fixed shafts 19. The pressure wheels 20 are close to the rack 9. When the driving motor 5 is started, the sealing plug plate 10 is driven to seal or When opening, the adjusting bolt 14 provided on the outer wall of the connecting frame 12 is turned. During the rotation of the adjusting bolt 14, the adjusting frame 16 is driven to approach the rack 9. The clamping wheel 20 inside the adjusting frame 16 is in full contact with the rack 9, thereby increasing the friction between the rack 9 and the clamping wheel 20, limiting the position of the rack 9, and ensuring the stability of the rack 9. The opening control of the sealing plug plate 10 is performed by scanning the rack 9 by a photoelectric switch, and transmitting the scanning pulse (the number of teeth of the rack 9) to the controller PLC system. The PLC control system compares the number of input scanning pulses with the host computer command, and stops the action output of the sealing plug plate 10 in time when the command number of the host computer is reached.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0027] 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 gate valve for a high-temperature gas transmission pipeline, comprising a main pipe (1) and a connecting pipe (2), characterized in that: A fixed frame (3) is fixedly provided on the outer wall of the connecting pipe (2), a base (4) is fixedly provided on the top outer wall of the fixed frame (3), a driving motor (5) is fixedly provided on the top outer wall of the base (4), a reducer (6) is fixedly provided on the output end of the driving motor (5), a connecting shaft (7) is fixedly provided on the output end of the reducer (6), a gear (8) is fixedly provided on the outer wall of the connecting shaft (7), a plate groove (301) is provided on the bottom of the inner wall of the fixed frame (3), a through hole (302) is provided on the top outer wall of the fixed frame (3), a rack (9) is slidably inserted into the inner wall of the through hole (302), and a sealing plug plate (10) is fixedly provided on the bottom outer wall of the rack (9).

2. A gate valve for a high-temperature gas transmission pipeline according to claim 1, characterized in that: A limiting device is fixedly provided on the top outer wall of the fixed frame (3), and the limiting device comprises a connecting frame (12) and an adjusting frame (16). A fixing plate (11) is fixedly provided on the top outer wall of the fixed frame (3), and the connecting frame (12) is located above the fixing plate (11). Two bolt holes (13) are provided on one side outer wall of the connecting frame (12), and adjusting bolts (14) are inserted into the inner walls of the two bolt holes (13). Limiting rings (15) are fixedly provided on the outer walls of one end of the two adjusting bolts (14) close to the adjusting frame (16). Two limiting caps (17) are fixedly provided on the outer wall of one side of the adjusting frame (16) close to the connecting frame (12), and limiting grooves (18) are provided on the outer walls of the two limiting caps (17), and the limiting rings (15) are engaged with the limiting grooves (18). Two fixing shafts (19) are fixedly provided on the inner wall of the adjusting frame (16), and pressure wheels (20) are rotatably provided on the outer walls of the two fixing shafts (19).

3. The gate valve for a high-temperature gas transmission pipeline according to claim 1, characterized in that: The inner walls of the main pipe (1) and the connecting pipe (2) are both fixedly provided with an isolation layer, an annular cavity (21) is formed between the isolation layer and the main pipe (1) and the connecting pipe (2), and the isolation layer is made of SUS310 material.

4. A gate valve for a high-temperature gas transmission pipeline according to claim 3, characterized in that: A second cooling air inlet pipe (203) is fixedly provided on the outer wall of the connecting pipe (2), and the second cooling air inlet pipe (203) extends into the interior of the annular cavity (21); a first cooling air inlet pipe (101) is fixedly provided on the outer wall of the main pipe (1), and the first cooling air inlet pipe (101) extends into the interior of the annular cavity (21).

5. The gate valve for a high-temperature gas transmission pipeline according to claim 3, characterized in that: The inner wall of the isolation layer is provided with a sealing groove (201) and a plurality of air outlet holes (202), and the sealing groove (201) is connected to the plate groove (301).

6. The gate valve for a high-temperature gas transmission pipeline according to claim 1, characterized in that: Two sealing brushes (303) are fixedly arranged at the bottom of the inner wall of the fixed frame (3), and the two sealing brushes (303) are respectively located on two sides of the plate groove (301).

7. The gate valve for a high-temperature gas transmission pipeline according to claim 1, characterized in that: The rack (9) extends into the interior of the fixed frame (3), and the rack (9) meshes with the gear (8).

8. The gate valve for a high-temperature gas transmission pipeline according to claim 1, characterized in that: The sealing plug plate (10) is located inside the fixed frame (3), the sealing plug plate (10) is plugged into the plate groove (301), the lower half of the sealing plug plate (10) is semicircular, the sealing plug plate (10) is adapted to the inner wall of the connecting pipe (2), and the sealing plug plate (10) is used to seal the inner wall of the connecting pipe (2).

9. The gate valve for a high-temperature gas transmission pipeline according to claim 5, characterized in that: The sealing plug plate (10) is plugged into the sealing groove (201).

10. The gate valve for a high-temperature gas transmission pipeline according to claim 2, characterized in that: The pressing wheel (20) is close to the rack (9), and the bottom outer wall of the adjustment frame (16) is slidably connected to the top outer wall of the fixed frame (3).

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