Direct-push type furnace discharge fire-blocking door of calcium carbide furnace

Abstract

The utility model relates to the technical field of calcium carbide furnaces, in particular to a calcium carbide furnace direct-push type discharge fire damper door, which comprises a calcium carbide furnace, a fire damper plate, a driving cylinder and a cover plate, the front side of the calcium carbide furnace is provided with a furnace mouth communicated inside and outside, and a lower guide rail is fixedly mounted on the front side of the lower part of the calcium carbide furnace corresponding to the position below the furnace mouth. The structure is reasonable and compact, the calcium carbide furnace direct-pushing type furnace discharging fire-blocking door is installed on the front left portion of a furnace discharging robot, the robot can be prevented from being blocked when grabbing a tool, the piston rod of the driving mechanism can enable the fire-blocking door to move left and right between the lower guide rail and the upper guide rail, the opening and closing functions are rapidly and effectively achieved, and the service life of the fire-blocking door is prolonged. The fire blocking door has the advantages that the fire blocking door is fast in opening and closing effect, the risk that hot materials splash to burn equipment in emergency can be avoided, the overhaul frequency of the equipment in front of the furnace is reduced, the abnormal operation time of the calcium carbide furnace is shortened, and the safety operation risk existing when personnel replace and repair the equipment can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of calcium carbide furnaces, and is a direct-pushing tapping fire door for a calcium carbide furnace. Background Art

[0002] The tapping system of the calcium carbide furnace has three independent furnace eyes, and the three furnace eyes are alternately tapped every 1 hour. In front of the furnace eyes, there are equipment such as a fire baffle, an intelligent robot, a tapping track, a tapping fume hood, a fire door, a tapping trolley and a calcium carbide pot, a hoist, a steel wire rope, and a cooling circulating water pipe.

[0003] During the tapping process of the intelligent robot, when the furnace eye is just opened, due to the change of the material layer in the calcium carbide furnace, the carbon monoxide gas generated by the internal reaction of the furnace expands and flushes through the material layer and quickly escapes from the furnace mouth. After the material layer sinks, it collapses to the furnace eye opening and ejects slag, causing burns to the robot body and damage to the circuit, resulting in chaotic tapping order or abnormal production indicators. In severe cases, it will lead to reduced load production of the calcium carbide furnace. When tapping, the hot slag (the temperature of the calcium carbide melt is above 800 °C) splashes onto the equipment in front of the furnace, causing the internal accessories of the equipment to burn and fall off, and the deformation of the equipment body. When the operator cleans the slag on the equipment, there are risks of mechanical injury and burns, and the circuit is frequently burned out, resulting in robot failure and unable to operate normally. Temporarily, it takes 4 to 6 hours to replace the burned-out accessories, and 2 people cooperate to complete the accessory replacement operation and position correction work, resulting in waste of equipment materials and increased labor of personnel. In severe cases, the slag splashes onto the tapping robot body and causes a fire, increasing the production cost and safety risks during the maintenance process.

[0004] The Chinese patent document with the publication number of CN210286764U discloses a remotely controlled fire door device for a calcium carbide furnace, which includes a fire door, a fixing frame, a driving device and a remote control unit. A fixing frame is fixedly installed outside the furnace mouth of the calcium carbide furnace. The fixing frame includes a column, an upper guide rail, a lower guide rail and a limit column. A column is fixedly installed to the left of the furnace mouth of the calcium carbide furnace, and an upper guide rail with the left part located to the left of the furnace mouth of the calcium carbide furnace is fixedly installed above the furnace mouth of the calcium carbide furnace. The lower side of the left end of the upper guide rail is fixedly installed together with the upper end of the column, and the lower side of the right end of the upper guide rail is fixedly installed together with the upper end of the limit column located to the right of the furnace mouth of the calcium carbide furnace. A lower guide rail with the left part located to the left of the furnace mouth of the calcium carbide furnace is provided below the furnace mouth of the calcium carbide furnace corresponding to the position between the column and the limit column, and the right end of the lower guide rail is fixedly installed with the left side of the lower end of the corresponding limit column. A fire door capable of blocking the material spraying from the furnace eye of the calcium carbide furnace is installed on the lower guide rail corresponding to the right side of the column. A driving device capable of moving the fire door left and right between the lower guide rail and the upper guide rail is installed on the left side of the lower part of the fire door, and the driving device is electrically connected to a control unit capable of sending instructions. It is not convenient to observe the internal state of the calcium carbide furnace when the fire door is closed.

[0005] The Chinese patent document with the publication number CN216869183U discloses a deformation prevention and fire blocking device for an electric arc furnace, which includes an electric arc furnace, a fire blocking door, a turtleback net, refractory castable, and a cylinder. There is a furnace opening on the electric arc furnace, and a fire blocking door is hinged on the electric arc furnace corresponding to the position of the furnace opening. A turtleback net is fixedly installed on the inner side of the fire blocking door, and refractory castable is poured on the turtleback net. A fixing bolt is fixedly installed on the outer side of the lower end of the fire blocking door, and the telescopic end of the cylinder is fixed together with the fixing bolt. The construction process of this fire blocking door is relatively complex and the construction period is long. During use, the refractory castable will fall off, resulting in a short service life of the fire blocking door and increasing the maintenance frequency of the fire blocking door.

[0006] The Chinese patent document with the publication number CN210569985U discloses a rapid anti-spray slag and fire blocking device, which includes an out-of-furnace fire blocking screen, an electric arc furnace, a fire blocking door, moving wheels, a traction rope, and a moving track. There is an electric arc furnace in the center of the upper end of the out-of-furnace fire blocking screen, and there is a furnace opening in front of the electric arc furnace that can communicate with the inside of the electric arc furnace; a moving track in the left-right direction is provided on the upper end surface of the out-of-furnace fire blocking screen corresponding to the front position of the electric arc furnace. The left end of the moving track is to the left of the furnace opening, and the right end of the moving track is to the right of the furnace opening. A moving groove that penetrates left and right is provided at the upper end of the moving track. A fire blocking door that can block the furnace opening is provided in front of the furnace opening corresponding to the position above the moving groove. At least two moving wheels are provided at left and right intervals at the lower end of the fire blocking door, and the lower ends of the moving wheels are located in the moving groove; a traction rope is fixedly installed at the front end of the fire blocking door. When this fire blocking door is opened and closed, the staff needs to pull the traction rope left and right, which is not only inconvenient to operate but also poses a risk of scalding the staff.

[0007] The Chinese patent document with the publication number CN220270086U discloses an emergency device for the out-of-furnace opening of an electric arc furnace, which is applied to an electric arc furnace. There is a left-right through out-of-furnace opening on the right side of the electric arc furnace, and it includes a fire blocking plate, a front guiding mechanism, a rear guiding mechanism, and a driving mechanism. A fire blocking plate with its right side located to the right of the electric arc furnace is provided in the out-of-furnace opening. A U-shaped sliding groove that penetrates left and right and opens downward is provided on the lower side of the middle of the fire blocking plate. A rear guiding mechanism is provided on the rear side of the right part of the fire blocking plate. The rear guiding mechanism includes a guide rail, a fixed rod, a connecting arm, a rotating shaft, and a guiding wheel. A guide rail is fixedly installed on the rear right side of the rear part of the electric arc furnace corresponding to the position behind the out-of-furnace opening. A guiding groove that opens forward is provided on the front side of the guide rail. The guiding groove includes a lifting section, a transition section, and a sealing section that are connected in sequence from top to bottom. Both the lifting section and the sealing section are vertically arranged, and the right part of the transition section is inclined upward relative to the left part. Two front-back fixed rods are fixedly installed at upper and lower intervals on the rear side of the right part of the fire blocking plate corresponding to the position to the right of the electric arc furnace. A connecting arm with its right part inclined upward relative to the left part is fixed at the rear end of each fixed rod. A rotating shaft with its rear end located in the sealing section is rotatably installed on the right part of each connecting arm. A guiding wheel is fixedly installed on the outer side of the rear end of each rotating shaft. A front guiding mechanism with the same structure as the rear guiding mechanism and symmetrically arranged is provided on the front side of the right part of the fire blocking plate, and a driving mechanism that can make the guiding wheel move up and down in the rear guiding groove is provided on the upper right side of the electric arc furnace.

[0008] The Chinese patent document with the publication number CN217636771U discloses an emergency device for preventing the ejection of materials during the tapping of an electric arc furnace, including an electric arc furnace, a sliding track, a fire baffle, a driving device, and a long strip groove. There is a furnace door on the front side of the electric arc furnace, and sliding tracks are respectively arranged on the left and right sides of the furnace door. Inside the sliding track corresponding to the upper position of the furnace door, a fire baffle that can slide downward to block the furnace door is slidably connected. Above the fire baffle, there is a driving device that can drive the fire baffle to slide up and down. In the middle of the fire baffle, there is a U-shaped long strip groove with an opening downward and running through from front to back. The fire baffles disclosed in the above two patent documents both use steel wire ropes during the lifting and lowering process. However, during the lifting and lowering process of the fire baffle, the steel wire ropes in the high-temperature environment will undergo plastic deformation, reducing the bearing capacity and service life. The steel wire ropes are prone to embrittlement and breakage, and the grease in the steel wire ropes will be evaporated and oxidized, easily causing the steel wire ropes to rust. Summary of the Invention

[0009] The utility model provides a direct-push tapping fire door for an electric arc furnace, which overcomes the deficiencies of the above-mentioned prior art and can effectively solve the problems that the existing fire door of the electric arc furnace is prone to deformation, resulting in frequent jamming, slow opening and closing speed, and easy burning of the tapping robot body and damage to the circuit.

[0010] The technical solution of the utility model is achieved by the following measures: A direct-push tapping fire door for an electric arc furnace includes an electric arc furnace, a fire baffle, a driving cylinder, and a cover plate. There is a furnace opening that is internally and externally connected on the front side of the electric arc furnace. A lower guide rail is fixedly installed on the front side of the lower part of the electric arc furnace corresponding to the lower position of the furnace opening, and an upper guide rail is fixedly installed on the front side of the upper part of the electric arc furnace corresponding to the upper position of the furnace opening. The lower side of the fire baffle is slidably installed on the upper side of the lower guide rail, and the upper side of the fire baffle is slidably installed on the lower side of the upper guide rail. The left end of the driving cylinder is installed on the front side of the electric arc furnace to the left of the furnace opening, and the right end of the piston rod of the driving cylinder is hingedly installed on the front side of the right part of the fire baffle. A through hole running through from front to back is provided in the middle front side of the fire baffle corresponding to the lower position of the driving cylinder, and a cover plate that can open and close the through hole is provided on the front side of the fire baffle corresponding to the position of the through hole.

[0011] The following is a further optimization and / or improvement of the above-mentioned technical solution of the utility model:

[0012] An articulated shaft can be fixedly installed on the front side of the lower part of the fire baffle corresponding to the lower position of the above-mentioned through hole, and an L-shaped connecting plate is fixedly installed on the front side of the fire baffle corresponding to the position between the upper part of the through hole and the driving cylinder. An arc-shaped guiding groove with an opening downward is formed between the rear side of the connecting plate and the front side of the fire baffle. The outer side of the upper part of the cover plate is located in the guiding groove, and the lower part of the cover plate is rotatably installed together with the articulated shaft. A limiting plate is fixedly installed at the right end of the guiding groove corresponding to the right side position of the cover plate.

[0013] The above cover plate can be fan-shaped, the left side surface of the cover plate is a vertical surface, and the right part of the right side surface of the cover plate is inclined upward relative to the left part.

[0014] The lower guide rail described above can be in a V shape with the opening facing downwards, and the upper guide rail is in a V shape with the opening facing upwards. Two lower mounting seats are fixedly installed at left and right intervals on the lower side of the fire baffle. Each lower mounting seat rotatably mounts a lower V-shaped roller, and each lower V-shaped roller is rollingly mounted on the outer side of the upper part of the lower guide rail. An upper mounting seat is fixedly installed on the upper side of the left part of the fire baffle. An upper V-shaped roller is rotatably installed in the upper mounting seat, and the upper V-shaped roller is rollingly mounted on the outer side of the lower part of the upper guide rail.

[0015] At least one left limit post can be fixedly installed at upper and lower intervals on the front side of the calcium carbide furnace corresponding to the left side position of the fire baffle. A right limit post is fixedly installed on the front side of the calcium carbide furnace corresponding to the position right of the furnace mouth, and the right limit post corresponds to the piston rod of the driving cylinder.

[0016] The air inlet and air outlet of the driving cylinder described above can be fixedly communicated with metal hoses, and a control valve is installed on each metal hose.

[0017] The structure of the present utility model is reasonable and compact. The direct-push type tapping fire door of the calcium carbide furnace is installed in the front left of the tapping robot, which can avoid hindering the robot's grasping tool. The piston rod of the driving mechanism can make the fire door move left and right between the lower guide rail and the upper guide rail, quickly and effectively realizing the opening and closing functions, providing favorable conditions for the normal tapping order. The opening and closing effect of the fire door in this application is fast, which can avoid the risk of hot material splashing and burning the equipment in case of emergencies, reduce the maintenance frequency of the front-of-furnace equipment, shorten the abnormal operation time of the calcium carbide furnace, and can also avoid the safety operation risk when personnel replace and repair the equipment. Description of the Drawings

[0018] Appendix Figure 1 It is the front view cross-sectional structure schematic diagram of Embodiments 1 to 6 of the present utility model.

[0019] Appendix Figure 2 It is the left view cross-sectional structure schematic diagram of Embodiments 1 to 6 of the present utility model.

[0020] The codes in the drawings are respectively: 1 is the calcium carbide furnace, 2 is the fire baffle, 3 is the driving cylinder, 4 is the cover plate, 5 is the upper guide rail, 6 is the lower guide rail, 7 is the observation hole, 8 is the hinge shaft, 9 is the connecting plate, 10 is the guide groove, 11 is the limit plate, 12 is the lower mounting seat, 13 is the lower V-shaped roller, 14 is the upper mounting seat, 15 is the upper V-shaped roller, 16 is the left limit post, 17 is the right limit post, 18 is the metal hose, 19 is the control valve. Detailed Embodiment

[0021] The present utility model is not limited by the following embodiments, and the specific implementation manner can be determined according to the technical solution of the present utility model and the actual situation.

[0022] In the present utility model, for the convenience of description, the description of the relative positional relationship of each component is based on the layout mode of the attached drawings of the specification. For example, the positional relationships such as front, rear, upper, lower, left, and right are determined according to the layout direction of the attached drawings of the specification. Figure 1 The layout mode of the attached drawings of the specification is used for description. For example, the positional relationships such as front, rear, upper, lower, left, and right are determined according to the layout direction of the attached drawings of the specification. Figure 1 is determined.

[0023] The present utility model will be further described below in conjunction with embodiments and the accompanying drawings:

[0024] Embodiment 1: As shown in the attached drawings Figure 1 and 2 , the direct-push type out-of-furnace fire baffle for the calcium carbide furnace includes a calcium carbide furnace 1, a fire baffle 2, a driving cylinder 3, and a cover plate 4. There is a furnace opening that is internally and externally connected on the front side of the calcium carbide furnace 1. A lower guide rail 6 is fixedly installed on the front lower side of the calcium carbide furnace 1 corresponding to the position below the furnace opening, and an upper guide rail 5 is fixedly installed on the front upper side of the calcium carbide furnace 1 corresponding to the position above the furnace opening. The lower side of the fire baffle 2 is slidably installed on the upper side of the lower guide rail 6, and the upper side of the fire baffle 2 is slidably installed on the lower side of the upper guide rail 5. The left end of the driving cylinder 3 is installed on the front side of the calcium carbide furnace 1 to the left of the furnace opening, and the right end of the piston rod of the driving cylinder 3 is hingedly installed on the front right part of the fire baffle 2. An observation hole 7 that penetrates through from front to back is provided in the middle front side of the fire baffle 2 corresponding to the position below the driving cylinder 3, and a cover plate 4 capable of opening and closing the observation hole 7 is provided on the front side of the fire baffle 2 corresponding to the position of the observation hole 7.

[0025] According to requirements, the specification of the fire baffle 2 is 20mm * 800mm * 800mm, both the upper guide rail 5 and the lower guide rail 6 are angle irons of 50mm * 50mm * 2000mm, and the driving cylinder 3 is a known prior art, such as MBT80 - 800Z - XB6, and the stroke of this cylinder is 800mm. During the use process, the direct-push type out-of-furnace fire baffle for the calcium carbide furnace is installed in the front left of the out-of-furnace robot, which can avoid hindering the grasping tool of the robot. The piston rod of the driving mechanism can make the fire baffle 2 move left and right between the lower guide rail 6 and the upper guide rail 5, quickly and effectively realizing the opening and closing functions, providing favorable conditions for the normal out-of-furnace order. The opening and closing effect of the fire baffle of this application is fast, which can avoid the risk of hot material splashing and burning the equipment in case of emergencies, reduce the maintenance frequency of the front-of-furnace equipment, shorten the abnormal operation time of the calcium carbide furnace 1, and can also avoid the safety operation risk when personnel replace and repair the equipment.

[0026] According to actual needs, the above-mentioned direct-push type out-of-furnace fire baffle for the calcium carbide furnace can be further optimized and / or improved:

[0027] Embodiment 2: As an optimization of the above embodiment, as shown in the attached drawings Figure 1 and 2As shown in the figure, a hinge shaft 8 is fixedly installed on the front side of the lower part of the fire baffle 2 corresponding to the position below the observation hole 7. An L-shaped connecting plate 9 is fixedly installed on the front side of the fire baffle 2 corresponding to the position between the upper part of the observation hole 7 and the driving cylinder 3. An arc-shaped guiding groove 10 with a downward opening is formed between the rear side of the connecting plate 9 and the front side of the fire baffle 2. The outer side of the upper part of the cover plate 4 is located in the guiding groove 10. The lower part of the cover plate 4 is rotatably installed with the hinge shaft 8. A limiting plate 11 is fixedly installed at the right end of the guiding groove 10 corresponding to the right side position of the cover plate 4.

[0028] During the use process, the guiding groove 10 formed by the connecting plate 9 and the fire baffle 2 and the limiting plate 11 can fix the cover plate 4, and the cover plate 4 can be limited in the guiding groove 10 by its own gravity. When it is necessary to open the observation hole 7, the staff only needs to use a steel bar to make the cover plate 4 rotate counterclockwise, so that the cover plate 4 is separated from the guiding groove 10, and then the observation hole 7 can be opened. When it is necessary to close the observation hole 7, the staff only needs to use a steel bar to make the cover plate 4 rotate clockwise, so that the cover plate 4 rotates into the guiding groove 10, and then the observation hole 7 can be closed. The opening and closing of the observation hole 7 are more convenient.

[0029] Embodiment Three: As an optimization of the above embodiment, as shown in the appendix Figure 1 、 2 As shown in the figure, the cover plate 4 is fan-shaped. The left side surface of the cover plate 4 is a vertical surface, and the right part of the right side surface of the cover plate 4 is inclined upward relative to the left part.

[0030] During the use process, through such a setting, when it is necessary to open the observation hole 7, the staff only needs to use a steel bar to make the cover plate 4 rotate counterclockwise, so that the cover plate 4 is separated from the guiding groove 10, and then the observation hole 7 can be opened. When it is necessary to close the observation hole 7, the staff only needs to use a steel bar to make the cover plate 4 rotate clockwise, so that the cover plate 4 rotates into the guiding groove 10, and then the observation hole 7 can be closed. The opening and closing of the observation hole 7 are more convenient. The cover plate 4 is limited in the guiding groove 10 by its own gravity, which is convenient for the rotation of the cover plate 4.

[0031] Embodiment Four: As an optimization of the above embodiment, as shown in the appendix Figure 1 、 2 As shown in the figure, the lower guide rail 6 is V-shaped with an upward opening, and the upper guide rail 5 is V-shaped with a downward opening. Two lower mounting seats 12 are fixedly installed on the lower side of the fire baffle 2 at left and right intervals. A lower V-shaped roller 13 is rotatably installed in each lower mounting seat 12, and each lower V-shaped roller 13 is rollingly installed on the outer side of the upper part of the lower guide rail 6. An upper mounting seat 14 is fixedly installed on the upper side of the left part of the fire baffle 2. An upper V-shaped roller 15 is rotatably installed in the upper mounting seat 14, and the upper V-shaped roller 15 is rollingly installed on the outer side of the lower part of the upper guide rail 5.

[0032] During use, with such a setting, the left and right movement of the fire baffle 2 can be made smoother, reducing the resistance between the fire baffle 2 and the guide rail, thereby reducing the load on the driving cylinder 3. The lower guide rail 6 is in a V shape with the opening facing downwards, and the upper guide rail 5 is in a V shape with the opening facing upwards. In this way, the fire baffle 2 can be limited by the V-shaped rollers and the guide rail, preventing the fire baffle 2 from tilting during the left and right movement and avoiding the separation of the fire baffle 2 from the guide rail, reducing the failure rate.

[0033] Embodiment Five: As an optimization of the above embodiment, as shown in the attached Figure 1 , 2 , at least one left limit post 16 is fixedly installed at the front side of the calcium carbide furnace 1 at intervals above and below the left side position of the fire baffle 2, and a right limit post 17 is fixedly installed at the front side of the calcium carbide furnace 1 corresponding to the right side position of the furnace mouth. The right limit post 17 corresponds to the piston rod of the driving cylinder 3.

[0034] During use, when the piston rod of the driving cylinder 3 is fully retracted, the left side of the fire baffle 2 contacts the left limit post 16. When the piston rod of the driving cylinder 3 is fully extended, the right side of the fire baffle 2 contacts the right limit post 17. Since the self-weight of the fire baffle 2 is relatively large, this can avoid the impact of the inertia of the fire baffle 2 on the driving cylinder 3 during the left and right movement, extending the service life of the driving cylinder 3. According to requirements, the left limit post 16 can be an L-shaped plate or a rod-shaped structure with a rectangular cross-section, and the right limit post can be a rod-shaped structure with a circular or rectangular cross-section. The right limit post can also be an L-shaped plate.

[0035] Embodiment Six: As an optimization of the above embodiment, as shown in the attached Figure 1 , both the air inlet and the air outlet of the driving cylinder 3 are fixedly connected and communicated with a metal hose 18, and a control valve 19 is installed on each metal hose 18.

[0036] During use, with such a setting, it can avoid the inlet and outlet pipes from being damaged by high-temperature gases or high-temperature furnace materials, extending the service life. By setting the control valve 19, the pressure of the compressed air in the metal hose 18 can be controlled within 0.4 Mpa to 0.65 Mpa, and the telescopic speed of the piston rod of the driving cylinder 3 can be adjusted, thereby adjusting the opening and closing speed of the fire baffle 2, making the control of the fire baffle 2 more flexible.

[0037] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effects. Non-essential technical features can be added or subtracted according to actual needs to meet the requirements of different situations.

Claims

1. A direct push fire-blocking door for a calcium carbide furnace, characterized in that It includes a calcium carbide furnace, a fire baffle, a driving cylinder and a cover plate. The front side of the calcium carbide furnace is provided with a furnace mouth connected inside and outside. A lower guide rail is fixedly installed on the front side of the lower part of the calcium carbide furnace corresponding to the position below the furnace mouth, and an upper guide rail is fixedly installed on the front side of the upper part of the calcium carbide furnace corresponding to the position above the furnace mouth. The lower side of the fire baffle is slidably installed on the upper side of the lower guide rail, and the upper side of the fire baffle is slidably installed on the lower side of the upper guide rail. The left end of the driving cylinder is installed on the front side of the calcium carbide furnace on the left side of the furnace mouth, and the right end of the piston rod of the driving cylinder is hingedly installed on the front side of the right part of the fire baffle. An observation hole that passes through from front to back is provided on the front side of the middle part of the fire baffle corresponding to the position below the driving cylinder, and a cover plate that can open and close the observation hole is provided on the front side of the fire baffle corresponding to the position of the observation hole.

2. The direct push fire-blocking door for calcium carbide furnace according to claim 1 is characterized in that A hinge shaft is fixedly installed on the front side of the lower part of the fire baffle corresponding to the position below the observation hole, and an L-shaped connecting plate is fixedly installed on the front side of the fire baffle corresponding to the position above the observation hole and between the driving cylinder. An arc-shaped guide groove opening downward is formed between the rear side of the connecting plate and the front side of the fire baffle. The outer side of the upper part of the cover plate is located in the guide groove, and the lower part of the cover plate is rotatably installed together with the hinge shaft. A limit plate is fixedly installed on the right end of the guide groove corresponding to the right side of the cover plate.

3. The direct push fire-blocking door for calcium carbide furnace according to claim 2 is characterized in that The cover plate is fan-shaped, the left side of the cover plate is a vertical surface, and the right part of the right side of the cover plate is inclined upward relative to the left part.

4. The calcium carbide furnace direct push fire-blocking door according to claim 1, 2 or 3, characterized in that The lower guide rail is in a V-shape with an opening downward, and the upper guide rail is in a V-shape with an opening upward. Two lower mounting seats are fixedly installed at intervals on the left and right sides of the lower side of the fire baffle, and a lower V-shaped roller is rotatably installed in each lower mounting seat. Each lower V-shaped roller is rollingly installed on the outer side of the upper portion of the lower guide rail. An upper mounting seat is fixedly installed on the upper left side of the fire baffle, and an upper V-shaped roller is rotatably installed in the upper mounting seat. The upper V-shaped roller is rollingly installed on the outer side of the lower portion of the upper guide rail.

5. The direct-push fire-blocking door for calcium carbide furnace according to claim 4 is characterized in that At least one left limit column is fixedly installed at upper and lower intervals on the front side of the calcium carbide furnace corresponding to the left side of the fire baffle, and a right limit column is fixedly installed on the front side of the calcium carbide furnace corresponding to the right side of the furnace mouth, and the right limit column corresponds to the piston rod of the driving cylinder.

6. The calcium carbide furnace direct push fire-blocking door according to claim 1, 2, 3 or 5, characterized in that The air inlet and the air outlet of the driving cylinder are both fixedly connected with metal hoses, and each metal hose is installed with a control valve.

7. The direct push fire-blocking door for calcium carbide furnace according to claim 4 is characterized in that The air inlet and the air outlet of the driving cylinder are both fixedly connected with metal hoses, and each metal hose is installed with a control valve.

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