Explosion-proof device for heating surface of boiler

Abstract

The utility model discloses a boiler heating surface explosion-proof device, and belongs to the technical field of safety production. The heating device comprises a boiler fixed heating surface, a boiler rotary heating surface, a T-shaped steel frame, a bearing fixed support, an electric winch, a steel wire rope, a first travel switch and a second travel switch, the boiler fixed heating surface is arranged at the top of a hearth or a flue, and a cover plate of the boiler rotary heating surface covers an opening of the boiler fixed heating surface. The T-shaped steel frame is hinged to the bearing fixing support and the center point of the cover plate, the bearing fixing support is arranged on one side of a fixed heating surface of the boiler, the electric winch is arranged above the T-shaped steel frame, a steel wire rope led out of the electric winch is connected with the T-shaped steel frame, and the first travel switch and the second travel switch are both installed on the steel wire rope. The electric winch drives the rotary heating surface of the boiler to open and close, so that the influence caused by the weight change of the rotary heating surface of the boiler is effectively eliminated, the opening and closing time is more accurate, the opening and closing stability is good, and the safety is higher.

Description

Technical Field

[0001] The utility model belongs to the technical field of safe production and relates to an explosion-proof device for a heating surface of a boiler. Background Art

[0002] A boiler is an energy conversion device. The energy input to the boiler includes chemical energy and electrical energy in the fuel. The boiler outputs steam, high-temperature water or organic heat carrier with a certain amount of thermal energy. Therefore, during the operation of the boiler, due to deflagration or induced draft fan failure, high pressure will be generated in its furnace or flue. If no measures are taken, the pressure will be too high, the risk of safety accidents will increase, and the flue will be easily damaged. Therefore, explosion-proof measures need to be taken for the heating surface of the boiler.

[0003] At present, explosion-proof devices in the form of bursting discs are mostly used to achieve boiler explosion-proof, but the bursting discs will be damaged by themselves after working. Therefore, they need to be replaced after each bursting disc works. On the one hand, the workload is large, and on the other hand, the cost is high. Some technologies use explosion-proof covers with counterweights to achieve boiler explosion-proof. For example, the patent with application number 201910917032.0 discloses an explosion-proof door of a waste heat boiler. When a deflagration occurs inside and a sufficiently large pressure is accumulated, the explosion-proof door cover and the counterweight shaft rotate together and open under the action of the impact force to relieve pressure. After the pressure is relieved, they reset. The explosion-proof door is closed with the outlet cover by its own weight and the weight of the counterweight. However, on the one hand, with the increase of running time, slagging is prone to occur on the explosion-proof door, which requires a greater impact force to open the explosion-proof door. As a result, when the pressure has reached the original set value, the explosion-proof door cannot be pushed open, causing a safety accident. On the other hand, the opening and closing speed of the explosion-proof door is greatly affected by the counterweight. After the explosion-proof door is opened by the impact force, the opening speed of the explosion-proof door will decrease in the second half of the process when it moves to the limit position, and in the closing process of the explosion-proof door, the speed of the first half is slower. As a result, the explosion-proof door cannot be opened to the required position in time, nor can it be closed in time, affecting the operation of the boiler.

[0004] Therefore, it is necessary to provide a boiler heating surface explosion-proof device to achieve the reuse of the explosion-proof device, reduce workload and use costs, and avoid the situation where the pressure reaches the preset value and the pressure cannot be released, causing safety accidents. The cover can also be opened and closed at a relatively uniform speed to reduce the impact on the boiler operation. Utility Model Content

[0005] In order to overcome the problems in the background technology, the electric winch of the utility model reels and releases the wire rope according to the pressure signal, thereby pulling up the rotating heating surface of the boiler to release the pressure, and resetting the rotating heating surface of the boiler at a uniform speed, reducing the impact of the pressure relief process on the operation of the boiler. In addition, the rotating heating surface of the boiler will not be destroyed by itself during operation, and can be reused, reducing the workload and use cost. At the same time, the electric winch works according to the pressure detected by the pressure measuring point. Even if the weight of the rotating heating surface of the boiler changes, it can be pulled up and opened, ensuring that after the pressure reaches the preset value, the rotating heating surface of the boiler is opened, the boiler is depressurized, and the potential safety accidents are reduced.

[0006] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0007] The boiler heating surface explosion-proof device comprises a boiler fixed heating surface 1, a boiler rotating heating surface 2, a T-shaped steel frame 4, a load-bearing fixed bracket 5, an electric winch 6, a steel wire rope 7, a first travel switch 8, and a second travel switch 9. The boiler fixed heating surface 1 is arranged on the top of the boiler furnace or flue and an opening is provided on the boiler fixed heating surface 1. The boiler rotating heating surface 2 comprises a cover plate and a protrusion. The protrusion is fixedly arranged at the bottom of the cover plate. The cover plate covers the opening provided on the boiler fixed heating surface 1, and the protrusion extends into the opening. One end of the horizontal section of the T-shaped steel frame 4 is hinged to the load-bearing fixed bracket 5, and the vertical section of the T-shaped steel frame 4 is hinged to the center point of the cover plate. The load-bearing fixed bracket 5 is fixedly arranged on one side of the fixed heating surface 1 of the boiler, and the angle between the load-bearing fixed bracket 5 and the fixed heating surface 1 of the boiler is an obtuse angle. The electric winch 6 is fixedly arranged above the T-shaped steel frame 4. The electric winch 6 leads out a steel wire rope 7. The lead-out end of the steel wire rope 7 is connected to the end of the vertical section of the T-shaped steel frame 4. The first travel switch 8 and the second travel switch 9 are both installed on the steel wire rope 7. The first travel switch 8 controls the travel of the electric winch 6 to reel in the steel wire rope 7, and the second travel switch 9 controls the travel of the electric winch 6 to release the steel wire rope 7. A pressure measuring point is arranged on the flue gas side in the flue, and the pressure measuring point is communicatively connected with the electric winch 6.

[0008] Preferably, a membrane water-cooled wall is provided on the protruding portion, and the membrane water-cooled wall is connected to the boiler water circulation system through a first connecting pipe 3, and the first connecting pipe 3 is two high-temperature and high-pressure resistant metal hoses.

[0009] Preferably, the explosion-proof device for the heating surface of the boiler also includes a limiting bracket 10, a shock absorber 11, and a shock absorber arm 12. One end of the shock absorber arm 12 is hinged to the load-bearing fixed bracket 5. The hinge point between the shock absorber arm and the load-bearing fixed bracket 5 and the hinge point between the T-shaped steel frame 4 and the load-bearing fixed bracket 5 are the same. The opposite end of the end where the T-shaped steel frame 4 is hinged to the load-bearing fixed bracket 5 is hinged to one end of the shock absorber 11. The other end of the shock absorber 11 is hinged to the free end of the shock absorber arm 12. The limiting bracket 10 is fixedly installed on the load-bearing fixed bracket 5. The top of the limiting bracket 10 is located on the moving path of the free end of the shock absorber arm 12, and it is pressed against the free end of the shock absorber arm 12 for limiting.

[0010] Preferably, the limiting bracket 10 limits the maximum rotation angle of the shock absorbing arm 12 to 40°.

[0011] Preferably, the limiting bracket 10 is a triangular structure.

[0012] Preferably, a temperature-resistant rubber 13 is provided at the contact position between the limiting bracket 10 and the free end of the shock absorbing arm 12 .

[0013] Preferably, the fixed heating surface 1 of the boiler is a coverless hollow cube structure, and a membrane water-cooled wall is provided on the fixed heating surface 1 of the boiler, and the membrane water-cooled wall is connected to the boiler water circulation system through a second connecting pipe, and the second connecting pipe is a boiler pipe.

[0014] Preferably, the number of pressure measuring points is 4.

[0015] Preferably, the pressure measuring point detects pressure by installing a pressure sensor, and the pressure sensor is communicatively connected with the electric winch 6 .

[0016] Beneficial effects of the utility model:

[0017] 1. The utility model reels in or releases the steel wire rope through an electric winch, thereby driving the boiler's rotating heating surface to open and close at a stable speed, which can keep the boiler's rotating heating surface moving at a relatively fast speed during the entire opening and closing process, has little impact on the normal operation of the boiler, improves the accuracy of the opening and closing timing, and reduces the safety hazards caused by the high-pressure environment in the boiler and the flue.

[0018] 2. The utility model uses a membrane water-cooled wall to cool the protrusion, and at the same time the membrane water-cooled wall is connected to the boiler raw water circulation, without the need for an additional water cooling system. The impact of the high temperature environment on the protrusion can be reduced at a relatively low cost, thereby extending the service life of the boiler's rotating heating surface.

[0019] 3. The utility model sets a limit bracket and a shock absorber so that when the rotating heating surface of the boiler is opened quickly, it will not be unable to close after the pressure is released due to excessive stroke caused by inertia. At the same time, the shock absorber is used for buffering to reduce the rigid collision effect between components, thereby reducing the probability of component damage, extending the service life of the components and reducing costs.

[0020] 4. The rotating heating surface of the boiler of the utility model does not need to achieve explosion-proof effect by self-destruction and can be reused continuously, which is beneficial to improve work efficiency and reduce use cost.

[0021] 5. The utility model transmits signals through pressure measuring points so that the electric winch can judge its own working state through the signals and operate, and controls the travel of the electric winch through the travel switch to realize the automatic operation of the rotating heating surface of the boiler, with high degree of automation and easy use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model, wherein Figure (a) is a schematic diagram of the boiler rotating heating surface in a closed state, and Figure (b) is a schematic diagram of the boiler rotating heating surface in an open state.

[0023] Figure 2 It is a schematic diagram of the membrane water-cooled wall structure of the utility model, wherein Figure (a) is a top view and Figure (b) is a front view.

[0024] Figure 3 The utility model is a schematic diagram of the T-shaped steel frame structure, wherein Figure (a) is a main view and Figure (b) is a top view.

[0025] Figure 4 It is a schematic diagram of the connection between the shock-absorbing frame, the limiting bracket and the load-bearing fixed bracket of the utility model.

[0026] In the figure, 1-fixed heating surface of boiler, 2-rotating heating surface of boiler, 3-first connecting pipe, 4-T-shaped steel frame, 5-load-bearing fixed bracket, 6-electric winch, 7-wire rope, 8-first travel switch, 9-second travel switch, 10-limit bracket, 11-shock absorber, 12-shock absorber arm, 13-heat-resistant rubber. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below in conjunction with specific embodiments.

[0028] like Figure 1 , 4As shown, the boiler heating surface explosion-proof device includes a boiler fixed heating surface 1, a boiler rotating heating surface 2, a T-shaped steel frame 4, a load-bearing fixed bracket 5, an electric winch 6, a wire rope 7, a first travel switch 8, and a second travel switch 9. The boiler fixed heating surface 1 is arranged on the top of the boiler furnace or the flue, and an opening is provided on the boiler fixed heating surface 1. The boiler rotating heating surface 2 includes a cover plate and a protrusion, and the protrusion is fixedly arranged at the bottom of the cover plate. The cover plate covers the opening provided on the boiler fixed heating surface 1, and the protrusion extends into the opening. One end of the horizontal section of the T-shaped steel frame 4 is hinged to the load-bearing fixed bracket 5, and the vertical section of the T-shaped steel frame 4 is hinged to the center point of the cover plate. The load-bearing fixed bracket 5 is fixedly arranged on one side of the fixed heating surface 1 of the boiler, and the angle between the load-bearing fixed bracket 5 and the fixed heating surface 1 of the boiler is an obtuse angle. The electric winch 6 is fixedly arranged above the T-shaped steel frame 4. The electric winch 6 leads out a steel wire rope 7. The lead-out end of the steel wire rope 7 is connected to the end of the vertical section of the T-shaped steel frame 4. The first travel switch 8 and the second travel switch 9 are both installed on the steel wire rope 7. The first travel switch 8 controls the travel of the electric winch 6 to reel in the steel wire rope 7, and the second travel switch 9 controls the travel of the electric winch 6 to release the steel wire rope 7. A pressure measuring point is arranged on the flue gas side in the flue, and the pressure measuring point is communicatively connected with the electric winch 6.

[0029] During the normal operation of the boiler, the pressure measuring point detects the pressure in the flue in real time. When the pressure is normal, the pressure measuring point transmits a signal to the electric winch 6, and the electric winch 6 does not run. The rotating heating surface 2 of the boiler remains in a covered state with the fixed heating surface 1 of the boiler. When an abnormal situation occurs in the flue (explosion, etc.), the pressure increases instantly, and the pressure measuring point detects a large pressure and transmits a signal to the electric winch 6. The electric winch 6 receives the pressure signal transmitted by the pressure measuring point and determines that the pressure signal has exceeded the preset threshold value, indicating that pressure relief is required at this time. The electric winch 6 is started to reel in the steel wire rope 7. The reeling of the steel wire rope 7 will pull the T-shaped steel frame 4 to rotate clockwise around its hinge point with the load-bearing fixed bracket 5 (such as Figure 1 ), thereby driving the boiler rotating heating surface 2 hinged to the vertical section of the T-shaped steel frame 4 to move, opening the boiler rotating heating surface 2, and releasing the pressure through the opening on the boiler fixed heating surface 1. When the electric winch 6 is in the process of winding the wire rope 7, the first stroke switch 8 is triggered, and the electric winch 6 is controlled to stop the winding action. At this time, the boiler rotating heating surface 2 is pulled by the wire rope 7 and remains in the open state. The boiler heating surface is in a pressure relief state. When the pressure relief is completed, the pressure measuring point detects that the pressure in the flue has returned to a normal level, and transmits the pressure signal to the electric winch 6. After receiving the pressure signal, the electric winch 6 determines that the pressure is lower than or equal to the preset threshold value, and then the electric winch 6 starts to run and releases the wire rope 7. As the length of the released wire rope 7 increases, the T-shaped steel frame 4 rotates counterclockwise around its hinge point with the load-bearing fixed bracket 5 (such as Figure 1), the boiler rotating heating surface 2 moves under the action of the T-shaped steel frame 4 and its own gravity to cover the opening opened on the boiler fixed heating surface 1. When the boiler rotating heating surface 2 covers the opening, the second stroke switch 9 is triggered to control the electric winch 6 to stop the wire-releasing action, so as to avoid excessive wire-releasing by the electric winch 6, which causes the steel wire rope 7 to pile up and entangle, and to keep the steel wire rope 7 in a taut state, so as to facilitate the next quick opening of the boiler rotating heating surface 2. Since the electric winch 6 can maintain a high speed and rotate at a uniform speed, the boiler rotating heating surface 2 is moved by the pulling force of the steel wire rope 7, which means that the weight of the boiler rotating heating surface 2 increases, and the electric winch 6 can also pull it open by winding the steel wire rope 7 to release the pressure in time, and the opening and closing movement speed of the boiler rotating heating surface 2 is relatively uniform, which can achieve rapid opening and closing, and reduce the impact of the pressure release process on the normal operation of the boiler.

[0030] The built-in control program of the electric winch 6 is a cyclic control mode, and a cyclic program is: the electric winch 6 reels the wire rope 7 → the electric winch 6 releases the wire rope 7 → the program ends. That is, the electric winch 6 needs to reel in the wire rope as a pre-action to release the wire rope 7, otherwise it will not start the operation of releasing the wire rope 7 unless it is switched to manual control. The electric winch is also provided with a manual reset button, which can be manually reset to the program end state during the program execution.

[0031] The protruding portion is provided with a membrane water-cooled wall, and the membrane water-cooled wall is connected to the boiler water circulation system through a first connecting pipe 3, and the first connecting pipe 3 is two high-temperature and high-pressure resistant metal hoses.

[0032] In order to ensure the normal operation of the boiler, the boiler product itself is equipped with a water cooling circulation system. After the membrane water-cooled wall on the protrusion is connected to the original water circulation system of the boiler, the protrusion can be water-cooled, reducing the probability of the protrusion being damaged in a high-temperature environment, which is beneficial to extending the service life of the boiler's rotating heating surface.

[0033] The explosion-proof device for the heating surface of the boiler also includes a limiting bracket 10, a shock absorber 11, and a shock absorber arm 12. One end of the shock absorber arm 12 is hinged to the load-bearing fixed bracket 5. The hinge point between the shock absorber arm and the load-bearing fixed bracket 5 and the hinge point between the T-shaped steel frame 4 and the load-bearing fixed bracket 5 are the same. The opposite end of the one end of the T-shaped steel frame 4 and the load-bearing fixed bracket 5 is hinged to one end of the shock absorber 11, and the other end of the shock absorber 11 is hinged to the free end of the shock absorber arm 12. The limiting bracket 10 is fixedly installed on the load-bearing fixed bracket 5. The top of the limiting bracket 10 is located on the moving path of the free end of the shock absorber arm 12, and it is pressed against the free end of the shock absorber arm 12 for limiting.

[0034] The limiting bracket 10 limits the maximum rotation angle of the shock absorbing arm 12 to 40°.

[0035] The limiting bracket 10 is a triangular structure.

[0036] like Figure 1 As shown, in the process from Figure (a) to Figure (b), the electric winch 6 reels the wire rope 7, and the wire rope 7 pulls the T-shaped steel frame 4 to rotate clockwise around the hinge point between it and the load-bearing fixed bracket 5, and the rotating heating surface 2 of the boiler is opened. Since the T-shaped steel frame 4 is connected to the shock absorbing arm 12 through the shock absorber 11, during the rotation of the T-shaped steel frame 4, the shock absorbing arm 12 also rotates in the clockwise direction. The limit bracket 10 is located on the moving path of the free end of the shock absorbing arm 12, and the shock absorbing arm 12 is blocked by the limit bracket 10 and cannot continue to move. At this time, the first travel switch 8 is also triggered to control the electric winch 6 to stop working, and since the boiler The rotating heating surface 2 of the boiler and the T-shaped steel frame 4 both have a certain dead weight. During the rapid pulling-up process, the rotating heating surface 2 of the boiler and the T-shaped steel frame 4 will generate a certain inertia. When the electric winch 6 stops working, the rotating heating surface 2 of the boiler may continue to move due to inertia, which may cause the rotating heating surface 2 of the boiler to have an excessive stroke, and may be unable to close or close too slowly. The limiting bracket 10 limits the movement of the rotating heating surface 2 of the boiler within a certain range, thereby avoiding the aforementioned situation. Installing the shock absorber 11 can reduce the vibration caused by the collision between the shock absorber arm 12 and the limiting bracket 10, reduce the probability of component damage, and make the device more stable.

[0037] A temperature-resistant rubber 13 is provided at the contact position between the limiting bracket 10 and the free end of the shock absorbing arm 12 .

[0038] Since the limit bracket 10 limits the position by blocking the movement of the shock absorbing arm 12 during the opening process of the rotating heating surface 2 of the boiler, when the shock absorbing arm 12 rotates at a faster speed, it will collide with the limit bracket 10. By providing the temperature-resistant rubber 13, the collision effect between the shock absorbing arm 12 and the limit bracket 10 is buffered, thereby reducing the probability of component damage caused by rigid collision.

[0039] The boiler fixed heating surface 1 is a coverless hollow cube structure, and a membrane water-cooled wall is arranged on the boiler fixed heating surface 1. The membrane water-cooled wall is connected to the boiler water circulation system through a second connecting pipe, and the second connecting pipe is a boiler pipe.

[0040] The fixed heating surface 1 of the boiler is cooled by a membrane water-cooled wall, thereby reducing the probability of the fixed heating surface 1 of the boiler being continuously affected by high temperature and thus being damaged.

[0041] There are 4 pressure measuring points.

[0042] The pressure measuring point detects the pressure by installing a pressure sensor, and the pressure sensor is communicatively connected with the electric winch 6 .

[0043] Multiple pressure measuring points can expand the pressure detection range. As long as the pressure signal transmitted to the electric winch 6 by one of the pressure measuring points is lower than the preset threshold, the electric winch 6 will start to reel in the wire rope 7 to open the boiler rotating heating surface 2, thereby enhancing safety and further reducing the situation where the boiler rotating heating surface 2 is not opened in time due to uneven pressure.

[0044] Working process of the utility model: during the normal operation of the boiler, the rotating heating surface of the boiler and the fixed heating surface of the boiler remain in a closed state. When an abnormal situation such as deflagration occurs, the pressure measuring point transmits the pressure detection signal to the electric winch. The electric winch receives the signal and determines that it is higher than or equal to the preset threshold value, then the electric winch starts to reel in the wire rope, pulls up the rotating heating surface of the boiler by reeling in the wire rope, opens the rotating heating surface of the boiler, and releases pressure through the opening on the fixed heating surface of the boiler. The reeling in the wire rope pulls up the rotating heating surface of the boiler until the shock absorbing arm is supported by the limit bracket, and at the same time, the first A travel switch is triggered to control the electric winch to stop, and the rotating heating surface of the boiler remains in the open state to relieve pressure. When the pressure is released, the pressure measuring point transmits the pressure signal to the electric winch. The electric winch receives the signal and determines that it is lower than the preset threshold value, and then starts to release the wire rope, so that the rotating heating surface of the boiler returns to the covering state with the fixed heating surface of the boiler. After the rotating heating surface of the boiler reaches the covering position, the second travel switch is triggered to control the electric winch to stop, and the boiler continues to operate normally. After that, the abnormal pressure increase occurs again, and the explosion-proof device repeats the above process.

[0045] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the utility model.

Claims

1. A boiler heating surface explosion-proof device, characterized in that: The boiler heating surface explosion-proof device comprises a boiler fixed heating surface (1), a boiler rotating heating surface (2), a T-shaped steel frame (4), a load-bearing fixed bracket (5), an electric winch (6), a steel wire rope (7), a first travel switch (8), and a second travel switch (9). The boiler fixed heating surface (1) is arranged on the top of the boiler furnace or flue and an opening is provided on the boiler fixed heating surface (1). The boiler rotating heating surface (2) comprises a cover plate and a protrusion. The protrusion is fixedly arranged at the bottom of the cover plate. The cover plate covers the opening provided on the boiler fixed heating surface (1), and the protrusion extends into the opening. One end of the horizontal section of the T-shaped steel frame (4) is hinged to the load-bearing fixed bracket (5), and the vertical section of the T-shaped steel frame (4) is hinged to the center point of the cover plate. The frame (5) is fixedly arranged on one side of the fixed heating surface (1) of the boiler, and the angle between the load-bearing fixed bracket (5) and the fixed heating surface (1) of the boiler is an obtuse angle. The electric winch (6) is fixedly arranged above the T-shaped steel frame (4). The electric winch (6) leads out a steel wire rope (7), and the lead-out end of the steel wire rope (7) is connected to the end of the vertical section of the T-shaped steel frame (4). The first travel switch (8) and the second travel switch (9) are both installed on the steel wire rope (7). The first travel switch (8) controls the travel of the electric winch (6) to reel in the steel wire rope (7), and the second travel switch (9) controls the travel of the electric winch (6) to release the steel wire rope (7). A pressure measuring point is arranged on the flue and the smoke side of the furnace, and the pressure measuring point is connected to the electric winch (6) for communication.

2. A boiler heating surface explosion-proof device according to claim 1, characterized in that: The protruding portion is provided with a membrane-type water-cooled wall, and the membrane-type water-cooled wall is connected to the boiler water circulation system through a first connecting pipe (3), and the first connecting pipe (3) is two high-temperature and high-pressure resistant metal hoses.

3. The explosion-proof device for heating surface of a boiler according to claim 1, characterized in that: The explosion-proof device for the heating surface of the boiler also includes a limiting bracket (10), a shock absorber (11), and a shock absorber arm (12); one end of the shock absorber arm (12) is hinged to the load-bearing fixed bracket (5); the hinge point between the shock absorber arm and the load-bearing fixed bracket (5) and the hinge point between the T-shaped steel frame (4) and the load-bearing fixed bracket (5) are the same; the opposite end of the hinged end of the T-shaped steel frame (4) and the load-bearing fixed bracket (5) is hinged to one end of the shock absorber (11); the other end of the shock absorber (11) is hinged to the free end of the shock absorber arm (12); the limiting bracket (10) is fixedly mounted on the load-bearing fixed bracket (5); the top of the limiting bracket (10) is located on the moving path of the free end of the shock absorber arm (12), and is pressed against the free end of the shock absorber arm (12) for limiting.

4. A boiler heating surface explosion-proof device according to claim 3, characterized in that: The limiting bracket (10) limits the maximum rotation angle of the shock absorbing arm (12) to 40°.

5. The explosion-proof device for heating surface of a boiler according to claim 3, characterized in that: The limiting bracket (10) is a triangular structure.

6. The explosion-proof device for heating surface of a boiler according to claim 3, characterized in that: A temperature-resistant rubber (13) is provided at the contact position between the limit bracket (10) and the free end of the shock-absorbing arm (12).

7. The explosion-proof device for heating surface of a boiler according to claim 1, characterized in that: The boiler fixed heating surface (1) is a coverless hollow cube structure, and the boiler fixed heating surface (1) is provided with a membrane water-cooled wall, and the membrane water-cooled wall is connected to the boiler water circulation system through a second connecting pipe, and the second connecting pipe is two boiler tubes.

8. The explosion-proof device for heating surface of a boiler according to claim 1, characterized in that: There are 4 pressure measuring points.

9. A boiler heating surface explosion-proof device according to any one of claims 1 to 8, characterized in that: The pressure measuring point detects pressure by installing a pressure sensor, and the pressure sensor is communicatively connected with the electric winch (6).

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