Safe explosion-proof cracking furnace

Abstract

According to the safe explosion-proof cracking furnace applied to the field of cracking processing, through the pressure relief cylinder, when the air pressure in the furnace body reaches a pressure relief threshold value, the explosion-proof valve is started, gas in the furnace body is transferred into the pressure relief cylinder through the gas transfer pipe, the piston piece is driven to ascend, and the sealing cover and the sealing ring are indirectly driven to move upwards; the sealing cover is arranged on the top of the furnace body, so that a notch is formed between the top of the furnace body and the sealing cover, pressure in the furnace body can be quickly and efficiently released, gas is cached through the caching cover, and environmental hidden dangers are avoided; the sealing cover is extruded by the outwards extending movable rod, so that the sealing connectivity of the furnace body and the sealing ring is enhanced, and when pressure relief is needed in the furnace body, the extending movable frame is retracted into the cavity, so that the movable rod is separated from the surface of the sealing ring under the action of the elastic piece, and subsequent jacking pressure relief operation of the sealing ring is facilitated.

Description

Technical Field

[0001] The invention relates to a safe explosion-proof cracking furnace, in particular to a safe explosion-proof cracking furnace used in the field of cracking processing. Background Art

[0002] A cracking furnace is a device used to crack organic compounds. Usually, high temperature, high pressure and other conditions are used to make organic compounds undergo a series of reactions to obtain different molecular structures and substances, including but not limited to alkanes, olefins, aromatic hydrocarbons, etc. Cracking furnaces have important applications in the fields of petrochemicals and chemical industries. However, there are also some problems with the use of cracking furnaces. On the one hand, due to the reaction under high temperature and high pressure, the operation is difficult and special attention should be paid to safety issues; on the other hand, cracking furnaces also pose certain risks to the environment and health, and emissions and waste treatment need to be done well.

[0003] The specification of Chinese invention patent CN202311399040.3 discloses an environmentally friendly intermittent cracking furnace, which solves the problem that the material to be cracked will accumulate at the bottom of the inner tank of the cracking furnace, making it difficult to distribute it evenly, resulting in poor heating uniformity of the material to be cracked. At the same time, the cracking furnace may also be coked, resulting in low pyrolysis efficiency of the device.

[0004] When the existing cracking furnace is working, it is usually in a high temperature and high pressure environment. When dealing with explosion-proof treatment, it is usually achieved by only one explosion-proof valve. However, when the pressure inside the cracking furnace is actually released to prevent explosion, the pressure relief volume of the explosion-proof valve is small, and the effective pressure relief operation cannot be completed in a short time, and the possibility of explosion still exists. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is how to provide a fast and effective pressure relief operation method for the cracking furnace at a node on the verge of explosion to assist it in completing the efficient pressure relief operation, thereby achieving explosion-proof safety of the cracking furnace.

[0006] In order to solve the above problems, the present invention provides a safe explosion-proof cracking furnace, comprising a furnace body, a feed pipe is obliquely installed on the surface of the furnace body, a fixed cover near the top of the furnace body surface is connected to a buffer cover, a driving motor is installed at the center of the top of the buffer cover, an output end of the driving motor is connected to a rotating rod extending into the furnace body, a stirring member is installed on the surface of the rotating rod located in the furnace body, a sealing cover is installed on the top of the furnace body, a sealing ring that fits the inner wall of the furnace body is installed on the inner side wall of the sealing cover, and a plurality of pressure relief valves are installed through the top of the sealing cover. Cylinder, an arc-shaped air transfer pipe is installed on the surface of the pressure relief cylinder, an explosion-proof valve is installed on the surface of the air transfer pipe, and a piston plate and a spacer arranged up and down are installed on the inner wall of the pressure relief cylinder, wherein the diameter of the piston plate is 0.95 times the inner diameter of the pressure relief cylinder, the spacer is fixedly connected to the inner wall of the pressure relief cylinder, and the bottom of the piston plate is connected with a guide rope that movably penetrates the spacer, the inner wall of the furnace body and the inner wall of the sealing cover are both installed with a V-shaped piece through an articulated ball, and the V-shaped piece is formed by two short rods connected by an articulated ball, and the tail end of the guide rope is connected to the surface of the articulated ball in the V-shaped piece.

[0007] In the above-mentioned safe explosion-proof cracking furnace, through the pressure relief cylinder, when the gas pressure in the furnace body reaches the pressure relief threshold, the explosion-proof valve can be started to transfer the gas in the furnace body to the pressure relief cylinder through the gas transfer pipe, driving the piston plate to rise, and indirectly driving the sealing cover and the sealing ring to move up, so that a gap is formed between the top of the furnace body and the sealing cover, so that the pressure in the furnace body can be quickly and efficiently released.

[0008] As a further improvement of the present application, the height of the sealing ring is smaller than the movement value of the piston plate, and the air inlet end of the air transfer pipe is located below the isolation plate, the air outlet end of the air transfer pipe is located between the isolation plate and the piston plate, and an air outlet hole is provided on the top wall of the pressure relief cylinder.

[0009] As a further improvement of the present application, the sealing cover is slidably sealedly connected to the rotating rod, and the distance between the top end of the sealing cover and the inner top wall of the buffer cover is greater than the stretching height value of the V-shaped member.

[0010] As a further improvement of the present application, a restraining frame is installed on the inner wall of the furnace body through an L-shaped bracket, and the guide rope is wound around the surface of the restraining frame, and the restraining frame is located below the sealing ring.

[0011] As a further improvement of the present application, the tail end of the feed pipe passes through the interior of the buffer cover, an exhaust pipe is installed through the bottom of the buffer cover, and the buffer cover is made of heat-insulating material.

[0012] As a further improvement of the present application, an explosion-proof safety system is also included. The explosion-proof safety system includes a processor installed on the surface of the furnace body, and the processor is connected to a pressure detection module and an explosion-proof demand input module. The pressure detection module is connected to the explosion-proof valve and the pressure sensor signal installed in the furnace body, and is used to start venting to the gas transfer pipe when the pressure value in the furnace body reaches a pressure relief threshold. The explosion-proof demand input module includes a display screen installed on the surface of the furnace body, which is used to input the corresponding pressure relief threshold according to the cracking needs.

[0013] As another improvement of the present application, a cavity is provided inside the rotating rod, the inner wall of the cavity is coated with a temperature-insulating coating, a return spring is installed on the top wall of the cavity, the tail end of the return spring is connected to an extrusion cone, a symmetrical extension frame is slidably installed on the top of the extrusion cone, and electromagnetic blocks are installed on the surfaces of the extension frames close to each other, the surface of the rotating rod is provided with a sliding groove matching the extension frame, the surface of the rotating rod is slidably connected to a movable rod, and the movable rod is located below the extrusion cone, and the parts of adjacent movable rods located in the cavity are connected by elastic parts.

[0014] As another improvement supplement to the present application, in the initial state, the tail end of the extrusion cone is located in an encirclement formed by multiple movable rods, there is a distance between the axes of the two extended movable frames and the position where the return spring contacts the top of the extrusion cone, the tail end of the movable rod is connected to a movable ball, and the vertical projection of the movable ball in the jacking state of the sealing cover is located on the inner side of the sealing ring.

[0015] As another improved supplement of the present application, a displacement sensor is installed inside the sealing cover, and two electromagnetic blocks are connected to the displacement sensor signal, and the displacement value of a single upward movement of the extrusion cone is smaller than the displacement value of a single upward movement of the sealing cover.

[0016] To summarize, the present application uses a pressure relief cylinder to activate the explosion-proof valve when the air pressure in the furnace body reaches the pressure relief threshold, and transfers the gas in the furnace body to the pressure relief cylinder through the gas transfer pipe, driving the piston plate to rise, and indirectly driving the sealing cover and the sealing ring to move up, so that a gap is formed between the top of the furnace body and the sealing cover, so that the pressure in the furnace body can be released quickly and efficiently, and the gas can be cached through the buffer cover to avoid environmental hazards. In addition, through the cooperation of the extended movable frame, movable rod and extrusion cone in the cavity, when the sealing cover does not need to be lifted, the sealing cover can be squeezed by the extended movable rod to strengthen the sealing connection between the furnace body and the sealing ring, and when pressure relief is needed in the furnace body, the extended movable frame is retracted into the cavity, so that the movable rod can be separated from the surface of the sealing ring under the action of the elastic member, so as to facilitate the subsequent lifting and pressure relief operation of the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the first implementation method of the present application; Figure 2 This is a schematic diagram of the internal structure of the furnace body according to the first embodiment of the present application; Figure 3 This is a schematic diagram of the installation of the sealing cover and the sealing ring according to the first embodiment of the present application; Figure 4 This is an internal diagram of the pressure relief cylinder of the first embodiment of the present application; Figure 5 This is a diagram of the pressure relief state of the pressure relief cylinder in the first embodiment of the present application; Figure 6 This is a diagram showing the sealing cover lifting and pressure relief state of the first embodiment of the present application; Figure 7 This is an installation diagram of a rotating rod, a movable rod and an extended movable frame according to a second embodiment of the present application; Figure 8 This is a diagram of the internal structure of the cavity according to the second embodiment of the present application; Fig. 9 This is an installation diagram of the movable rod and the elastic member of the second embodiment of the present application; Fig.10 This is a diagram showing the state in which the extrusion cone of the second embodiment of the present application falls and drives the movable rod to extend outward.

[0018] Description of the numbers in the figure: 1. Furnace body; 101. Feed pipe; 2. Drive motor; 3. Buffer cover; 31. Exhaust pipe; 4. Rotating rod; 5. Sealing cover; 51. Sealing ring; 6. Pressure relief cylinder; 61. Rotating air pipe; 62. Piston plate; 63. Isolation plate; 64. V-shaped piece; 65. Guide rope; 7. Restraining frame; 8. Extending movable frame; 9. Movable rod; 10. Return spring; 11. Extrusion cone; 91. Elastic piece. DETAILED DESCRIPTION

[0019] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0020] The first implementation method: Figure 1-4A safe explosion-proof cracking furnace is shown, comprising a furnace body 1, a feed pipe 101 is obliquely installed on the surface of the furnace body 1, a buffer cover 3 is connected to a fixed cover near the top of the furnace body 1, a driving motor 2 is installed at the center of the top of the buffer cover 3, an output end of the driving motor 2 is connected to a rotating rod 4 extending into the furnace body 1, a stirring member is installed on the rod surface of the rotating rod 4 located in the furnace body 1, a sealing cover 5 is installed on the top of the furnace body 1, a sealing ring 51 that fits the inner wall of the furnace body 1 is installed on the inner side wall of the sealing cover 5, a plurality of pressure relief cylinders 6 are installed through the top of the sealing cover 5, and the surface of the pressure relief cylinder 6 is installed There is an arc-shaped air transfer pipe 61, and an explosion-proof valve is installed on the surface of the air transfer pipe 61. The inner wall of the pressure relief cylinder 6 is installed with a piston plate 62 and an isolation plate 63 arranged up and down, wherein the diameter of the piston plate 62 is 0.95 times the inner diameter of the pressure relief cylinder 6, and the isolation plate 63 is fixedly connected to the inner wall of the pressure relief cylinder 6. The bottom of the piston plate 62 is connected with a guide rope 65 that movably passes through the isolation plate 63. The inner wall of the furnace body 1 and the inner wall of the sealing cover 5 are both installed with a V-shaped part 64 through an articulated ball, and the V-shaped part 64 is formed by two short rods connected by an articulated ball, and the tail end of the guide rope 65 is connected to the surface of the articulated ball in the V-shaped part 64.

[0021] The tail end of the feed pipe 101 passes through the interior of the buffer cover 3, and an exhaust pipe 31 is installed through the bottom of the buffer cover 3. The buffer cover 3 is made of heat-insulating material.

[0022] Specifically, during cracking, the processed material is fed into the furnace body 1 through the feed pipe 101, and then the drive motor 2 is started to drive the rotating rod 4 and the stirring member on the surface to rotate, so as to stir the processed material in the furnace body 1 to prevent coking in the furnace body 1; When the pressure in the furnace body 1 reaches the pressure relief threshold, the explosion-proof valve is activated to transport the gas in the furnace body 1 to the gas transfer pipe 61, and then the gas quickly enters the space between the isolation plate 63 and the piston plate 62, which has a lifting effect on the piston plate 62 (even if there is a gap between the piston plate 62 and the inner wall of the pressure relief cylinder 6, the cross-sectional area of ​​the gas outlet end of the gas transfer pipe 61 is larger than the gap area between the piston plate 62 and the inner wall of the pressure relief cylinder 6. Therefore, when a large amount of gas enters the gas transfer pipe 61 in a short period of time, it can normally play a gas accumulation effect and thus play a lifting role, such as Figure 5 As shown in FIG. 1 ), the guide rope 65 is stretched, and under the guidance of the restraining frame 7, the hinge ball in the V-shaped member 64 is stretched and pulled, so that the V-shaped member 64 is opened, and then the sealing cover 5 is lifted, so that the sealing ring 51 is also moved up synchronously with the sealing cover 5, so that a gap is formed between the top of the furnace body 1 and the middle of the sealing cover 5, so that the gas can be quickly released (as shown in FIG. Figure 6 As shown), it has the effect of relieving the pressure inside the furnace body 1; After the pressure relief is completed, the pressure inside the furnace body 1 drops, the explosion-proof valve is closed, the gas supply inside the gas transfer pipe 61 stops, the piston plate 62 loses its lifting function, and falls back to its original position after a short period of time, and the sealing cover 5 and the sealing ring 51 fall synchronously and seal the top of the furnace body 1; The gas released from the gap formed after the sealing ring 51 leaves the top of the furnace body 1 enters the interior of the buffer cover 3, which can avoid environmental hazards caused by gas leakage. At the same time, the gas with waste heat can be transferred to the waste heat recovery equipment through the exhaust pipe 31 for waste heat recovery, thereby achieving energy-saving effect.

[0023] The height of the sealing ring 51 is smaller than the movement value of the piston plate 62, and the air inlet end of the air transfer pipe 61 is located below the isolation plate 63, and the air outlet end of the air transfer pipe 61 is located between the isolation plate 63 and the piston plate 62. The top wall of the pressure relief cylinder 6 is provided with an air outlet.

[0024] Specifically, after the pressure relief is completed, the gas above the piston plate 62 can be released into the buffer cover 3 through the gap between the piston plate 62 and the inner wall of the pressure relief cylinder 6 and the air outlet hole; Since the height of the sealing ring 51 is smaller than the movement value of the piston plate 62, after the piston plate 62 moves up, it can drive the sealing ring 51 away from the top of the furnace body 1 to form a gap for pressure relief and explosion prevention.

[0025] The sealing cover 5 is slidably sealedly connected to the rotating rod 4 , and the distance between the top end of the sealing cover 5 and the inner top wall of the buffer cover 3 is greater than the stretching height value of the V-shaped member 64 .

[0026] Specifically, the vertical gap between the sealing cover 5 and the buffer cover 3 ensures that there is a gap between the sealing cover 5 and the buffer cover 3 even after the sealing cover 5 is lifted, which will not affect the smooth lifting of the sealing cover 5.

[0027] A restraining frame 7 is installed on the inner wall of the furnace body 1 through an L-shaped bracket, and the guide rope 65 is wound around the surface of the restraining frame 7 . The restraining frame 7 is located below the sealing ring 51 .

[0028] Specifically, the restraining frame 7 is designed to restrain the moving direction of the guide rope 65 , and is designed to be located below the sealing ring 51 to avoid blocking the displacement of the sealing ring 51 .

[0029] It also includes an explosion-proof safety system, which includes a processor installed on the surface of the furnace body 1, to which a pressure detection module and an explosion-proof demand input module are connected. The pressure detection module is connected to the explosion-proof valve and a pressure sensor signal installed in the furnace body 1, and is used to start venting to the gas transfer pipe 61 when the pressure value in the furnace body 1 reaches a pressure relief threshold. The explosion-proof demand input module includes a display screen installed on the surface of the furnace body 1, which is used to input the corresponding pressure relief threshold according to the cracking needs.

[0030] Specifically, the pressure relief thresholds under different cracking requirements are transmitted through the display screen to adapt to the pressure relief and explosion-proof requirements of different cracking products. In addition, the pressure sensor is installed in the furnace body 1 to monitor the pressure conditions in the door of the furnace body 1, so as to open the explosion-proof valve in time when the pressure relief threshold is reached, and use the pressure relief cylinder 6 for rapid pressure relief.

[0031] The second implementation method: Figure 7-9 It is shown that a cavity is provided inside the rotating rod 4, the inner wall of the cavity is coated with a temperature-insulating paint, a reset spring 10 is installed on the top wall of the cavity, the tail end of the reset spring 10 is connected to an extrusion cone 11, a symmetrical extension frame 8 is slidably installed on the top of the extrusion cone 11, and electromagnetic blocks are installed on the surfaces of the extension frames 8 close to each other, the surface of the rotating rod 4 is provided with a sliding groove matching the extension frame 8, the surface of the rotating rod 4 is slidably connected to a movable rod 9, and the movable rod 9 is located below the extrusion cone 11, and the parts of adjacent movable rods 9 located in the cavity are connected by elastic members 91.

[0032] In the initial state, the tail end of the extrusion cone 11 is located in the encirclement formed by multiple movable rods 9, and there is a distance between the axes of the two extended movable frames 8 and the position where the return spring 10 contacts the top of the extrusion cone 11. The tail end of the movable rod 9 is connected to a movable ball, and the vertical projection of the movable ball of the sealing cover 5 in the jacking state is located on the inner side of the sealing ring 51.

[0033] A displacement sensor is installed inside the sealing cover 5 , and two electromagnetic blocks are connected to the displacement sensor signal. The displacement value of a single upward movement of the extrusion cone 11 is smaller than the displacement value of a single upward movement of the sealing cover 5 .

[0034] Different from the first embodiment, this embodiment improves the tightness of the fit between the sealing ring 51 and the inner wall of the furnace body 1 .

[0035] Specifically, when the pressure in the furnace body 1 is below the pressure relief threshold, the electromagnetic blocks are in a mutually repelling state, and at this time, the bottom of the sealing cover 5 is pressed on the surface of the extended movable frame 8, so that the extended movable frame 8 is at the bottom of the sliding groove, and then drives the extrusion cone 11 to squeeze the movable rod 9, so that the outwardly extending part of the rod body of the movable rod 9 is squeezed on the surface of the sealing ring 51, which has a squeezing effect and strengthens the overall sealing of the furnace body 1; Before the sealing cover 5 is lifted, that is, when the explosion-proof valve is opened, the electromagnetic blocks are in a state of mutual attraction. At this time, the extrusion cone 11 is subjected to the inertia of the reset spring 10, and moves upward to drive the extrusion cone 11 to leave the encirclement formed by the multiple movable rods 9. At this time, under the action of the elastic member 91, the movable rod 9 is reset and separated from the surface of the sealing ring 51, and the restraining effect on the sealing ring 51 is lost. Then the gas in the furnace body 1 enters the rotating gas pipe 61 and indirectly drives the sealing cover 5 to move upward through the upward movement of the piston plate 62. In this process, the electromagnetic blocks are attracted to each other and are stored in the rotating Inside the movable rod 4, the sealing cover 5 will not be intercepted laterally when it moves up, and because the movement displacement value of the extrusion cone 11 after resetting is smaller than the movement displacement value of the sealing cover 5 and smaller than the length value of the sliding groove, the electromagnetic block and the extended movable frame 8 are located below the sealing cover 5 in the vertical direction after the jacking. When the sealing cover 5 moves down subsequently, the displacement sensor can switch the working state of the electromagnetic block in time, switch to a mutually exclusive state, and extend out of the sliding groove. When the sealing cover 5 moves down, it can drive the extrusion cone 11 to move down and gradually drive the movable rod 9 to extend outward (such as Fig.10 As shown), the sealing ring 51 has an extrusion effect.

[0036] In summary, the present application uses the pressure relief cylinder 6 to activate the explosion-proof valve when the air pressure in the furnace body 1 reaches the pressure relief threshold, transfer the gas in the furnace body 1 to the pressure relief cylinder 6 through the gas transfer pipe 61, and use the gap between the inner wall of the pressure relief cylinder 6 and the piston plate 62 and the difference between the gas outlet end of the gas transfer pipe 61 to drive the piston plate 62 to rise, indirectly drive the sealing cover 5 and the sealing ring 51 to move up, so that a gap is formed between the top of the furnace body 1 and the sealing cover 5, so that the pressure in the furnace body 1 can be quickly and efficiently released, and the gas is cached through the buffer cover 3 to avoid environmental hidden dangers. In addition, by cooperating with the extending movable frame 8, the movable rod 9 and the extruding cone 11 in the cavity, when the sealing cover 5 does not need to be lifted, the extending movable rod 9 can be used to squeeze the sealing cover 5 so as to strengthen the sealing connection between the furnace body 1 and the sealing ring 51, and when pressure relief is required in the furnace body 1, the extending movable frame 8 can be retracted into the cavity, and the extruding cone 11 can be lifted and reset under the action of the reset spring 10, so that the movable rod 9 can be separated from the surface of the sealing ring 51 under the action of the elastic member 91, so as to facilitate the subsequent lifting and pressure relief operation of the sealing ring 51.

[0037] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A safe explosion-proof cracking furnace, comprising a furnace body (1), a feed pipe (101) being obliquely mounted on the surface of the furnace body (1), characterized in that: A buffer cover (3) is connected to a fixed cover at a position near the top of the furnace body (1); a driving motor (2) is installed at the center of the top circle of the buffer cover (3); an output end of the driving motor (2) is connected to a rotating rod (4) extending into the furnace body (1); a stirring member is installed on the surface of the rotating rod (4) located in the furnace body (1); a sealing cover (5) is installed on the top of the furnace body (1); a sealing ring (51) is installed on the inner side wall of the sealing cover (5) and is in contact with the inner wall of the furnace body (1); a plurality of pressure relief cylinders (6) are installed through the top of the sealing cover (5); an arc-shaped air transfer pipe (61) is installed on the surface of the pressure relief cylinder (6); and the air transfer pipe (61) is installed on the surface of the pressure relief cylinder (6). An explosion-proof valve is installed on the surface of the pressure relief cylinder (61), and a piston plate (62) and a spacer (63) are installed on the inner wall of the pressure relief cylinder (6), wherein the diameter of the piston plate (62) is 0.95 times the inner diameter of the pressure relief cylinder (6), and the spacer (63) is fixedly connected to the inner wall of the pressure relief cylinder (6), and the bottom of the piston plate (62) is connected to a guide rope (65) that movably penetrates the spacer (63), and the inner wall of the furnace body (1) and the inner wall of the sealing cover (5) are both installed with a V-shaped member (64) through a hinged ball, and the V-shaped member (64) is formed by two short rods connected by a hinged ball, and the tail end of the guide rope (65) is connected to the surface of the hinged ball in the V-shaped member (64).

2. A safe explosion-proof cracking furnace according to claim 1, characterized in that: The height of the sealing ring (51) is smaller than the movement value of the piston plate (62), the air inlet end of the air transfer pipe (61) is located below the isolation plate (63), the air outlet end of the air transfer pipe (61) is located between the isolation plate (63) and the piston plate (62), and the top wall of the pressure relief cylinder (6) is provided with an air outlet hole.

3. A safe explosion-proof cracking furnace according to claim 1, characterized in that: The sealing cover (5) is slidably sealedly connected to the rotating rod (4), and the distance between the top end of the sealing cover (5) and the inner top wall of the buffer cover (3) is greater than the stretching height value of the V-shaped member (64).

4. A safe explosion-proof cracking furnace according to claim 1, characterized in that: A restraining frame (7) is installed on the inner wall of the furnace body (1) via an L-shaped bracket, and a guide rope (65) is wound around the surface of the restraining frame (7). The restraining frame (7) is located below the sealing ring (51).

5. The safe explosion-proof cracking furnace according to claim 1, characterized in that: The tail end of the feed pipe (101) passes through the interior of the buffer cover (3), an exhaust pipe (31) is installed through the bottom of the buffer cover (3), and the buffer cover (3) is made of a heat-insulating material.

6. A safe explosion-proof cracking furnace according to claim 1, characterized in that: The invention also includes an explosion-proof safety system, which includes a processor installed on the surface of the furnace body (1), the processor being connected to a pressure detection module and an explosion-proof demand input module, the pressure detection module being connected to the explosion-proof valve and a pressure sensor signal installed in the furnace body (1), and being used to start venting gas into the gas transfer pipe (61) when the pressure value in the furnace body (1) reaches a pressure relief threshold, and the explosion-proof demand input module including a display screen installed on the surface of the furnace body (1), and being used to input a corresponding pressure relief threshold according to cracking requirements.

7. The safe explosion-proof cracking furnace according to claim 1, characterized in that: A cavity is provided inside the rotating rod (4), the inner wall of the cavity is coated with a temperature-insulating coating, a return spring (10) is installed on the top wall of the cavity, the tail end of the return spring (10) is connected to an extrusion cone (11), a symmetrical extension frame (8) is slidably installed on the top of the extrusion cone (11), and electromagnetic blocks are installed on the surfaces of the extension frames (8) close to each other, a sliding groove matching the extension frame (8) is provided on the surface of the rotating rod (4), a movable rod (9) is slidably connected to the surface of the rotating rod (4), and the movable rod (9) is located below the extrusion cone (11), and the adjacent parts of the movable rod (9) located in the cavity are connected by an elastic member (91).

8. A safe explosion-proof cracking furnace according to claim 7, characterized in that: In the initial state, the tail end of the extrusion cone (11) is located in an encirclement formed by a plurality of movable rods (9), and there is a distance between the axes of the two extending movable frames (8) and the position where the return spring (10) contacts the top of the extrusion cone (11). The tail end of the movable rod (9) is connected to a movable ball, and the vertical projection of the movable ball is located on the inner side of the sealing ring (51) when the sealing cover (5) is in the lifted state.

9. A safe explosion-proof cracking furnace according to claim 8, characterized in that: A displacement sensor is installed inside the sealing cover (5), and two electromagnetic blocks are connected to the displacement sensor signal. The displacement value of a single upward movement of the extrusion cone (11) is smaller than the displacement value of a single upward movement of the sealing cover (5).

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