Pressure regulating system for gas collecting pipe of coke oven

Abstract

The invention relates to the technical field of coke oven production, in particular to a coke oven gas collecting pipe pressure adjusting system which comprises a gas collecting pipe, a gas suction pipe and a gas pipe, the side wall of the gas collecting pipe is fixedly communicated with a plurality of hollow rods, and corrugated buffer pipes are fixedly installed at the multiple ends of the gas suction pipe; the ends, away from the gas suction pipe, of the multiple buffer pipes are fixedly connected with the multiple hollow rods correspondingly, one end of the gas pipe fixedly communicates with the gas suction pipe, and butterfly valves are arranged on the surfaces of multiple pipelines of the gas suction pipe correspondingly. The butterfly valve comprises a valve rod, a valve fixedly installed at the bottom end of the valve rod and a hand wheel fixedly installed at the top end of the valve rod through a plurality of connecting rods, rotating openings are formed in the surfaces of a plurality of pipelines of the air suction pipe, and the valve rods are installed in the rotating openings in a sealed and rotating mode. Through cooperation of the butterfly valves and the gas suction pipe, the problem that the pressure of the gas collecting pipe fluctuates severely due to the fact that a large amount of raw gas is instantly generated during coal charging of the coke oven can be effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of coke oven production, in particular to a coke oven gas collecting pipe pressure regulating system. Background Art

[0002] The coke oven is a combination of porous chamber coking units that plays a core role in coking production. It converts coal into coke through a series of complex physical and chemical reactions. The gas collecting pipe is the collection channel for coke oven gas. It is responsible for collecting the raw gas produced by the carbonization chambers of the coke oven during the coking process and transporting it to subsequent gas purification and chemical product recovery sections. The matching pressure regulation system aims to maintain the gas collecting pipe pressure within a stable and reasonable range by controlling parameters such as gas flow and pressure in the gas collecting pipe, thereby ensuring the safe and efficient operation of coke oven production and stable processing in subsequent sections.

[0003] With the widespread application of large-scale coke ovens in coking production in China, a large amount of raw coal gas will instantly flow into the gas collection system when the coke ovens are loaded with coal, causing the pressure in the gas collection pipe to increase sharply. The existing pressure regulation system is not only difficult to effectively control the pressure, but will cause large fluctuations in the gas collection pipe pressure. Since the coke ovens have extremely high requirements for the stability of the operating pressure of the gas collection pipe, excessive pressure fluctuations will not only affect the normal operation and service life of the coke ovens themselves, but will also produce adverse chain reactions on subsequent work sections. In particular, when the pressure is too high, smoke and fire will appear from the furnace door, seriously endangering the on-site operating environment and safe production. Summary of the Invention

[0004] The purpose of the present invention is to solve the following shortcomings in the prior art: the existing pressure regulating system not only has poor pressure control effect, but also causes large pressure fluctuations. The coke oven has strict requirements on the pressure stability of the gas collecting pipe. Excessive pressure fluctuations will affect the operation and life of the coke oven and trigger a chain reaction in subsequent work sections. When the pressure is too high, the furnace door will smoke and fire, which seriously threatens on-site safety and the production environment. A coke oven gas collecting pipe pressure regulating system is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A coke oven gas collecting pipe pressure regulating system comprises a gas collecting pipe, an E-shaped intake pipe, and a gas pipe. The side wall of the gas collecting pipe is fixedly connected to a plurality of hollow rods. The multiple ends of the intake pipe are fixedly mounted with corrugated buffer pipes. The ends of the multiple buffer pipes away from the intake pipe are respectively fixedly connected to the multiple hollow rods. One end of the gas pipe is fixedly connected to the intake pipe. The multiple pipe surfaces of the intake pipe are provided with butterfly valves. The butterfly valves include a valve stem, a valve fixedly mounted at the bottom end of the valve stem, and a handwheel fixedly mounted at the top end of the valve stem via multiple connecting rods. The multiple pipe surfaces of the intake pipe are provided with rotating ports. The multiple valve stems are respectively and sealingly rotatably mounted in the rotating ports. A flow stabilizing grid is provided in the gas pipe, and the flow stabilizing grid is composed of a plurality of metal sheets which are equidistantly and vertically fixedly installed in the gas pipe.

[0006] Preferably, a slow flow component is provided in each of the multiple pipes of the intake pipe, and the slow flow component is used to slow down the flow rate of the gas.

[0007] Preferably, the slow flow assembly includes two rotating shafts and two slow flow plates fixedly mounted on the two rotating shafts respectively. The intake pipe is symmetrically provided with mounting grooves for accommodating the two slow flow plates respectively. The two rotating shafts are rotatably mounted in the two mounting grooves respectively and are staggered. The two rotating shafts are controlled to rotate together by the pressure assembly.

[0008] Preferably, the pressing assembly includes a movable plate and two threaded rods vertically fixedly installed on the lower surface of the movable plate. The top end of the rotating shaft passes through the suction pipe and is provided with a threaded groove that matches the thread on the surface of the threaded rod. The bottom ends of the two threaded rods are respectively threaded in the two threaded grooves. The movable plate is connected to the pipeline of the suction pipe through a telescopic component. A pressing rod is fixedly installed on the top of the movable plate. The top end of each pressing rod is in sliding contact with the lower surface of each handwheel respectively. The lower surface of the handwheel is provided with a pressing groove with a longitudinal cross-section of an isosceles trapezoid.

[0009] Preferably, a mounting opening is provided at the top end of the push rod, a round rod is horizontally rotatably mounted in the mounting opening, a push wheel is fixedly sleeved on the round rod, and the push wheel is in rolling contact with the hand wheel.

[0010] Preferably, the telescopic component includes two L-shaped rods, two hollow columns and two telescopic springs. The pipe surface of the intake pipe is symmetrically fixed with fixed blocks. The two hollow columns are respectively fixedly installed on the surfaces of the two fixed blocks. The two L-shaped rods are respectively slidably inserted in the two hollow columns, and the ends of the two L-shaped rods close to each other are fixedly connected to the movable plate. The two telescopic springs are respectively located in the two hollow columns, and the two ends of the telescopic springs are respectively fixedly connected to the bottom end of the L-shaped rod and the surface of the fixed block.

[0011] Preferably, a plurality of groups of cover components are provided on the surface of the gas collecting pipe, and the plurality of groups of cover components are used to cover a plurality of buffer tubes respectively.

[0012] Preferably, multiple groups of the cover assemblies are respectively mounted on multiple hollow rods, and the cover assemblies include multiple metal rings. Two adjacent metal rings are fixedly connected by elastic cloth, the metal ring close to the gas collecting pipe is fixedly connected to the gas collecting pipe by two fixing rods, and the metal ring away from the gas collecting pipe is controlled to move by an air pressure assembly.

[0013] Preferably, the pneumatic assembly includes two cross rods fixedly mounted on the surfaces of two hollow columns and two movable rods, one end of the cross rod is provided with a through opening fixedly connected to the inside of the hollow column, the L-shaped rod sliding seal is inserted in the hollow column, the two movable rods are sliding seal inserted in the two through openings, and one end of each is fixedly connected to the surface of the metal ring away from the gas collecting pipe.

[0014] Compared with the prior art, the present invention has the following beneficial effects: Through the coordination between multiple butterfly valves and E-type suction pipes, the butterfly valves can be opened at the moment of coal loading to increase the area of ​​the raw gas outlet channel and quickly export a large amount of new raw gas. This can effectively solve the problem of large amounts of raw gas being instantly generated when the coke oven is loaded with coal, which causes drastic fluctuations in the gas collecting pipe pressure. The buffer tube has good elasticity. When a large amount of raw gas rushes in at the moment of coal loading, the buffer tube can temporarily accommodate some of the raw gas through its own expansion and contraction deformation, reducing the impact of the airflow on the subsequent pipelines and butterfly valves, playing a buffering role and making the airflow more stable. At the same time, during normal production, it can also buffer and adjust small fluctuations in the airflow to maintain a relatively stable pressure in the gas collecting pipe. The flow stabilizing grid can sort out the raw gas discharged from the suction pipe, making the airflow distribution more uniform, avoiding local turbulence, further stabilizing the pressure of the gas collecting pipe, and helping to improve the efficiency of the subsequent gas processing section; When the butterfly valve is in the open state, the two slow-flow plates in the suction pipe will be in a horizontal state and stored in two installation grooves respectively. When the butterfly valve is in the closed state, the two slow-flow plates will be in a vertical state in the pipe, which can effectively slow down the flow rate of the gas and prevent the high-speed gas from hitting the valve, which will affect the sealing of the valve. When the butterfly valve is open, the shroud assembly does not cover the buffer tube. When the butterfly valve is closed, the shroud assembly will cover the buffer tube, thereby protecting the buffer tube while maintaining the buffer effect and optimizing system operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front perspective structural diagram of a coke oven gas collecting pipe pressure regulating system proposed by the present invention; Figure 2 This is a schematic diagram of a partial three-dimensional cross-sectional structure of a suction pipe in a coke oven gas collecting pipe pressure regulating system proposed by the present invention; Figure 3 This is a schematic diagram of the partial three-dimensional structure of the suction pipe and gas pipe of a coke oven gas collecting pipe pressure regulating system proposed by the present invention; Figure 4 This is a partial three-dimensional structural diagram of a slow flow component in a coke oven gas collecting pipe pressure regulating system proposed by the present invention; Figure 5 This is a partial three-dimensional structural diagram of a butterfly valve in a coke oven gas collecting pipe pressure regulating system proposed by the present invention; Figure 6 This is a schematic diagram of a partial three-dimensional cross-sectional structure of a gas pipe in a coke oven gas collecting pipe pressure regulating system proposed by the present invention; Figure 7 This is a partial three-dimensional structural diagram of a gas collecting pipe in a coke oven gas collecting pipe pressure regulating system proposed by the present invention; Figure 8 This is a partial three-dimensional structural diagram of a housing component in a coke oven gas collecting pipe pressure regulating system proposed by the present invention; Figure 9 This is a partial three-dimensional structural diagram of the rotating shaft and slow flow plate of a coke oven gas collecting pipe pressure regulating system proposed by the present invention; Figure 10 for Figure 1 A in the middle is an enlarged structural diagram; Figure 11 for Figure 4 Enlarged structural diagram at point B in the middle.

[0016] In the figure: 1 gas collecting pipe, 2 suction pipe, 3 gas pipe, 4 hollow rod, 5 buffer tube, 6 valve stem, 7 valve, 8 handwheel, 9 rotating shaft, 10 slow flow plate, 11 mounting groove, 12 movable plate, 13 threaded rod, 14 threaded groove, 15 push rod, 16 push groove, 17 push wheel, 18 L-shaped rod, 19 hollow column, 20 telescopic spring, 21 fixing block, 22 metal ring, 23 elastic cloth, 24 fixing rod, 25 cross bar, 26 movable rod, 27 through port, 28 metal sheet, 29 mounting port, 30 connecting rod. DETAILED DESCRIPTION

[0017] 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.

[0018] Reference Figures 1-11A coke oven gas collecting pipe pressure regulating system includes a gas collecting pipe 1, an E-shaped intake pipe 2, and a gas pipe 3. The side wall of the gas collecting pipe 1 is fixedly connected to multiple hollow rods 4. Corrugated buffer pipes 5 are fixedly installed at multiple ends of the intake pipe 2. The ends of the multiple buffer pipes 5 away from the intake pipe 2 are respectively fixedly connected to the multiple hollow rods 4. The buffer pipes 5 have good elasticity. When a large amount of raw gas flows in at the moment of coal loading, the buffer pipes 5 can temporarily accommodate some of the raw gas through their own expansion and contraction deformation, thereby reducing the impact of the airflow on subsequent pipelines and butterfly valves, and playing a buffering role. The airflow is made smoother. At the same time, during normal production, it can also buffer and adjust small fluctuations in the airflow to maintain relative stability of the pressure in the gas collecting pipe 1. One end of the gas pipe 3 is fixedly connected to the intake pipe 2. Butterfly valves are provided on the surfaces of multiple pipes of the intake pipe 2. The multiple butterfly valves are controlled to switch by a control system. The butterfly valve includes a valve stem 6, a valve 7 fixedly installed at the bottom end of the valve stem 6, and a handwheel 8 fixedly installed at the top end of the valve stem 6 through multiple connecting rods 30. Rotating ports are opened on the surfaces of multiple pipes of the intake pipe 2, and multiple valve stems 6 are respectively sealed and rotatably installed in the rotating ports.

[0019] A flow stabilizing grid is provided in the gas pipe 3. The flow stabilizing grid is composed of a plurality of metal sheets 28 equidistantly and vertically fixedly installed in the gas pipe 3. The flow stabilizing grid can sort out the raw gas discharged through the suction pipe 2, making the airflow distribution more uniform, avoiding local turbulence, further stabilizing the pressure of the gas collecting pipe 1, and helping to improve the efficiency of the subsequent gas processing section.

[0020] During normal coking production in the coke oven, only one butterfly valve among the multiple pipes of the intake pipe 2 is in the open state, so that only one pipe is inhaling. When the coke oven starts to be loaded with coal, the remaining butterfly valves can be controlled to open, so that multiple pipes can be inhaled, thereby increasing the area of ​​the raw gas outlet channel, and introducing a large amount of raw gas instantaneously generated during coal loading into the intake pipe 2 and entering the subsequent work section. The raw gas in the gas collecting pipe 1 can be smoothly discharged, reducing the pressure of the gas collecting pipe 1, reducing the pressure fluctuation of the gas collecting pipe 1, and stabilizing the pressure of the gas collecting pipe 1.

[0021] The multiple pipelines of the intake pipe 2 are all provided with a slow flow component, which is used to slow down the flow rate of the gas. The slow flow component includes two rotating shafts 9 and two slow flow plates 10 fixedly sleeved on the two rotating shafts 9. The pipeline of the intake pipe 2 is symmetrically provided with mounting grooves 11 for accommodating the two slow flow plates 10. The two rotating shafts 9 are rotatably installed in the two mounting grooves 11 and are staggered. The two rotating shafts 9 are controlled to rotate together by the pressing component. The pressing component includes a movable plate 12 and two threaded rods 13 vertically fixedly installed on the lower surface of the movable plate 12. The top of the rotating shaft 9 passes through the intake pipe 2 and is provided with a threaded groove 14 adapted to the surface thread of the threaded rod 13. The bottom ends of the two threaded rods 13 are respectively threadedly installed in the two threaded grooves 14. The movable plate 12 is connected to the intake pipe 2 through a telescopic component. The pipeline connection, the telescopic component includes two L-shaped rods 18, two hollow columns 19 and two telescopic springs 20. The pipeline surface of the suction pipe 2 is symmetrically fixed with a fixed block 21, and the two hollow columns 19 are respectively fixedly installed on the surface of the two fixed blocks 21. The two L-shaped rods 18 are respectively slidably inserted in the two hollow columns 19, and the ends of the two L-shaped rods 18 close to each other are fixedly connected to the movable plate 12. The two telescopic springs 20 are respectively located in the two hollow columns 19, and the two ends of the telescopic springs 20 are respectively fixedly connected to the bottom end of the L-shaped rod 18 and the surface of the fixed block 21. The top of the movable plate 12 is fixedly installed with a push rod 15, and the top of each push rod 15 is respectively in sliding contact with the lower surface of each handwheel 8, and the lower surface of the handwheel 8 is provided with a push groove 16 with an isosceles trapezoidal longitudinal section.

[0022] When the valve 7 in the butterfly valve is in the closed state, the top of the push rod 15 will be located in the push groove 16, the two telescopic springs 20 will be in a natural state, and the two slow flow plates 10 will be in a vertical state in the pipeline of the suction pipe 2. When the valve 7 in the butterfly valve is opened, the hand wheel 8 will also rotate. As the hand wheel 8 rotates, the top of the push rod 15 will slide in contact with the groove wall of the push groove 16, and gradually move downward with the moving plate 12 and the two threaded rods 13 under the action of the inclined surface pressure. Since the two threaded rods 13 cannot rotate, the two slow flow plates 10 located in the pipeline of the suction pipe 2 will gradually rotate to enter the two mounting grooves under the cooperation of the thread on the surface of the threaded rod 13 and the thread groove 14. 11, and when the valve 7 changes from an open state to a closed state, as the handwheel 8 rotates, the top of the push rod 15 will slide in contact with the lower surface of the handwheel 8. When the valve 7 is rotated to a closed state, the push rod 15 will correspond to the position of the push groove 16, and the pressing force applied by the handwheel 8 to the push rod 15 will disappear. The push rod 15, the movable plate 12 and the threaded rod 13 will quickly move up and reset under the elastic potential energy of the two telescopic springs 20, and the two slow flow plates 10 will rotate out of the mounting grooves 11 again. That is, when the valve 7 is closed, the two slow flow plates 10 will rotate out of the two mounting grooves 11, and when the valve 7 is opened, the two slow flow plates 10 will enter the two mounting grooves 11.

[0023] When the valve 7 is closed, the two slow flow plates 10 located in the pipeline of the intake pipe 2 are rotated out of the installation groove 11. The originally relatively smooth gas flow channel is blocked by the slow flow plates 10, and the gas can no longer flow smoothly in a straight line. The slow flow plates 10 divide the flow channel into multiple parts, and the gas needs to flow around the slow flow plates 10, which greatly increases the resistance to gas flow. According to the principles of fluid mechanics, as the resistance increases, the gas flow rate will decrease, thereby avoiding the gas directly hitting the closed valve 7 at high speed.

[0024] The presence of the slow flow plate 10 causes the airflow to disperse when it encounters them. The originally concentrated high-speed airflow is dispersed into multiple relatively low-speed airflows, which flow through different sides of the slow flow plate 10. In this way, the kinetic energy of the gas is dispersed, and its impact force on the valve 7 is also reduced, thereby reducing the adverse effects on the sealing of the valve 7. If the high-speed airflow directly hits the valve 7, the strong impact force may cause the sealing components of the valve 7 to be displaced or deformed, thereby destroying its sealing performance. The slow flow plate 10 effectively avoids this situation.

[0025] A mounting opening 29 is provided at the top of the push rod 15, and a round rod is horizontally rotatably installed in the mounting opening 29. A push wheel 17 is fixedly sleeved on the round rod. The push wheel 17 is in rolling contact with the hand wheel 8. The push wheel 17 can reduce the friction between the contact surface of the push rod 15 and the hand wheel 8.

[0026] The surface of the gas collecting pipe 1 is provided with multiple groups of covering components, which are used to cover multiple buffer tubes 5 respectively. The multiple groups of covering components are respectively sleeved on multiple hollow rods 4. The covering components include multiple metal rings 22. Two adjacent metal rings 22 are fixedly connected by elastic cloth 23. The metal ring 22 close to the gas collecting pipe 1 is fixedly connected to the gas collecting pipe 1 through two fixed rods 24. The metal ring 22 away from the gas collecting pipe 1 is controlled to move by a pneumatic component. The pneumatic component includes two cross bars 25 and two moving rods 26 respectively fixedly mounted on the surfaces of two hollow columns 19. One end of the cross bar 25 is provided with a through hole 27 fixedly connected to the hollow column 19. The L-shaped rod 18 is slidingly sealed and inserted in the hollow column 19. The two moving rods 26 are slidingly sealed and inserted in the two through holes 27, and one end is fixedly connected to the surface of the metal ring 22 away from the gas collecting pipe 1.

[0027] When the valve 7 is closed, the covering assembly will also cover the buffer tube 5 corresponding to the position of the valve 7, and when the valve 7 is open, the covering assembly will not cover the buffer tube 5 corresponding to the position of the valve 7.

[0028] When the valve 7 is in the closed state, the push rod 15 is not subjected to external force, so that the two telescopic springs 20 are in a natural state, and the L-shaped rod 18 is at the highest point. At this time, the space volume between the end of the L-shaped rod 18 in the hollow column 19 and the surface of the fixed block 21 is the largest. When the valve 7 is in the open state, the push rod 15 will gradually move downward, and the two telescopic springs 20 will gradually shrink. The L-shaped rod 18 will move in the hollow column 19, and the space volume between the end of the L-shaped rod 18 in the hollow column 19 and the surface of the fixed block 21 will gradually decrease, and the pressure will increase. The gas in the hollow column 19 will squeeze into the through port 27 and push the moving rod 26 in the through port 27 to move away from the gas collecting pipe 1 The metal ring 22 moves toward the direction close to the gas collecting pipe 1. At this time, the spacing between the multiple metal rings 22 will gradually decrease, and the multiple elastic cloths 23 will also fold, so that the buffer tube 5 will gradually be exposed to the outside. When the valve 7 is gradually closed, the push rod 15 will gradually move up and reset under the elastic potential energy of the two telescopic springs 20. The volume of the space between the end of the L-shaped rod 18 in the hollow column 19 and the surface of the fixed block 21 will gradually increase, and the pressure will decrease. The gas in the through port 27 will be sucked into the hollow column 19, and the moving rod 26 will also move the metal ring 22 away from the gas collecting pipe 1 in the direction away from the gas collecting pipe 1, so that the multiple metal rings 22 and the multiple elastic cloths 23 will cover the buffer tube 5 again.

[0029] When the butterfly valve is closed and the system is in a non-working or low-flow state, the cover assembly covers the buffer tube 5, which can prevent the buffer tube 5 from being physically damaged by external mechanical collisions, scratches by debris, etc., thereby extending the service life of the buffer tube 5, and can to a certain extent block the erosion of the buffer tube 5 by dust, corrosive gases, etc. Because there are dust, sulfur-containing gases and other corrosive components in the coke oven production environment, the cover assembly can reduce the contact between these substances and the buffer tube 5, thereby reducing the aging and corrosion rate of the buffer tube 5 material.

[0030] At the same time, the internal gas environment of the buffer tube 5 can be maintained relatively stable. After the butterfly valve is closed, external airflow is prevented from interfering with the residual gas in the buffer tube 5, and the pressure balance in the buffer tube 5 is avoided from being destroyed by external airflow disturbance, thereby ensuring that the buffer tube 5 can quickly and effectively play a buffering role when it works next time.

[0031] The operator can quickly judge the working status of the butterfly valve and the operation status of the system by observing the status of the cover assembly. When the cover assembly is seen covering the buffer tube 5, the operator can intuitively know that the butterfly valve is in a closed state and the system is in a relatively stable non-working or low-flow stage, which is conducive to timely grasping the system working conditions and making reasonable operation arrangements. If the buffer tube 5 has an abnormality, the presence of the cover assembly can help narrow the scope of troubleshooting. If a problem is found in the buffer tube 5 in the cover assembly, it can be more accurately located whether the buffer tube 5 itself changes in performance during the closure of the butterfly valve or is affected by external factors, thereby improving the efficiency of troubleshooting and resolution.

[0032] In the present invention, when the coke oven is in normal coking production, only one butterfly valve among the multiple pipes of the intake pipe 2 is in an open state, so that only one pipe is inhaling. When the coke oven starts to be loaded with coal, the remaining butterfly valves can be controlled to open, so that multiple pipes are inhaled, thereby increasing the area of ​​the raw gas outlet channel, and introducing a large amount of raw gas instantaneously generated during coal loading into the intake pipe 2 and entering the subsequent work section. The raw gas in the gas collecting pipe 1 can be smoothly discharged, the pressure of the gas collecting pipe 1 can be reduced, the pressure fluctuation of the gas collecting pipe 1 can be reduced, and the pressure of the gas collecting pipe 1 can be stabilized.

[0033] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A coke oven gas collecting pipe pressure regulating system, comprising a gas collecting pipe (1), an E-type air intake pipe (2) and a gas pipe (3), characterized in that: The side wall of the gas collecting pipe (1) is fixedly connected to a plurality of hollow rods (4), and the plurality of ends of the intake pipe (2) are fixedly installed with corrugated buffer tubes (5), and the ends of the plurality of buffer tubes (5) away from the intake pipe (2) are respectively fixedly connected to the plurality of hollow rods (4), and one end of the gas pipe (3) is fixedly connected to the intake pipe (2). The surfaces of the plurality of pipes of the intake pipe (2) are provided with butterfly valves, and the butterfly valves include a valve stem (6), a valve (7) fixedly installed at the bottom end of the valve stem (6), and a hand wheel (8) fixedly installed at the top end of the valve stem (6) through a plurality of connecting rods (30). The surfaces of the plurality of pipes of the intake pipe (2) are provided with rotating ports, and the plurality of valve stems (6) are respectively sealed and rotatably installed in the rotating ports; A flow stabilizing grid is provided in the gas pipe (3), and the flow stabilizing grid is composed of a plurality of metal sheets (28) equidistantly and vertically fixedly installed in the gas pipe (3).

2. A coke oven gas collecting pipe pressure regulating system according to claim 1, characterized in that: A plurality of pipes of the air intake pipe (2) are each provided with a flow-slowing component, and the flow-slowing component is used to slow down the flow rate of the gas.

3. A coke oven gas collecting pipe pressure regulating system according to claim 2, characterized in that: The slow flow assembly comprises two rotating shafts (9) and two slow flow plates (10) respectively fixedly sleeved on the two rotating shafts (9); mounting grooves (11) respectively used for accommodating the two slow flow plates (10) are symmetrically opened in the pipe of the intake pipe (2); the two rotating shafts (9) are respectively rotatably mounted in the two mounting grooves (11) and are staggered; the two rotating shafts (9) are controlled to rotate together by the pressing assembly.

4. A coke oven gas collecting pipe pressure regulating system according to claim 3, characterized in that: The pressing assembly comprises a movable plate (12) and two threaded rods (13) vertically fixedly mounted on the lower surface of the movable plate (12); the top end of the rotating shaft (9) passes through the air intake pipe (2) and is provided with a threaded groove (14) adapted to the surface thread of the threaded rod (13); the bottom ends of the two threaded rods (13) are respectively threadedly mounted in the two threaded grooves (14); the movable plate (12) is connected to the pipeline of the air intake pipe (2) through a telescopic component; a pressing rod (15) is fixedly mounted on the top end of the movable plate (12); the top end of each pressing rod (15) is in sliding contact with the lower surface of each hand wheel (8); and the lower surface of the hand wheel (8) is provided with a pressing groove (16) having an isosceles trapezoidal longitudinal section.

5. A coke oven gas collecting pipe pressure regulating system according to claim 4, characterized in that: The top end of the push rod (15) is provided with a mounting opening (29), a round rod is horizontally rotatably mounted in the mounting opening (29), a push wheel (17) is fixedly sleeved on the round rod, and the push wheel (17) is in rolling contact with the hand wheel (8).

6. A coke oven gas collecting pipe pressure regulating system according to claim 4, characterized in that: The telescopic component comprises two L-shaped rods (18), two hollow columns (19) and two telescopic springs (20); a fixed block (21) is symmetrically fixedly installed on the pipe surface of the suction pipe (2); the two hollow columns (19) are respectively fixedly installed on the surfaces of the two fixed blocks (21); the two L-shaped rods (18) are respectively slidably inserted into the two hollow columns (19); and the ends of the two L-shaped rods (18) close to each other are fixedly connected to the movable plate (12); the two telescopic springs (20) are respectively located in the two hollow columns (19), and the two ends of the telescopic springs (20) are respectively fixedly connected to the bottom end of the L-shaped rod (18) and the surface of the fixed block (21).

7. A coke oven gas collecting pipe pressure regulating system according to claim 6, characterized in that: The surface of the gas collecting pipe (1) is provided with a plurality of groups of covering components, and the plurality of groups of covering components are respectively used to cover a plurality of buffer tubes (5).

8. The coke oven gas collecting pipe pressure regulating system according to claim 7, characterized in that: Multiple groups of the cage components are respectively sleeved on multiple hollow rods (4), and the cage components include multiple metal rings (22). Two adjacent metal rings (22) are fixedly connected by elastic cloth (23). The metal ring (22) close to the gas collecting pipe (1) is fixedly connected to the gas collecting pipe (1) by two fixing rods (24), and the metal ring (22) away from the gas collecting pipe (1) is controlled to move by a pneumatic component.

9. The coke oven gas collecting pipe pressure regulating system according to claim 8, characterized in that: The pneumatic assembly comprises two cross bars (25) and two movable bars (26) respectively fixedly mounted on the surfaces of two hollow columns (19); one end of the cross bar (25) is provided with a through hole (27) fixedly connected to the inside of the hollow column (19); the L-shaped bar (18) is inserted in a sliding and sealing manner in the hollow column (19); the two movable bars (26) are respectively inserted in a sliding and sealing manner in the two through holes (27), and one end of each of the two movable bars is fixedly connected to the surface of the metal ring (22) away from the gas collecting pipe (1).

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