Intelligent petroleum burner state monitoring and early warning device

Abstract

The invention belongs to the technical field of petroleum combustion detection equipment, and discloses an intelligent petroleum burner state monitoring and early warning device which comprises a protection box, a monitor is fixedly installed on the inner wall of the protection box, a fixing plate is arranged below the monitor, the fixing plate is fixedly connected with the inner wall of the protection box, and the monitor is fixedly connected with the inner wall of the protection box. An air bag is arranged in the fixing plate, a traction plate is fixedly installed on one side of the air bag, a fixed pulley is fixedly installed on the inner wall of the protection box, and through the arrangement of the air bag, in the process that the air bag is heated to expand, the traction plate fixedly installed on one side of the air bag is connected with the fixed pulley and the vent hole on the inner wall of the protection box through a round rope; when the air bag is expanded, the traction plate can move along with the air bag, the ventilation holes in the bottom of the protection box are rapidly closed through the transmission effect of the round rope, and burning hot air is effectively prevented from continuously entering the protection box.

Description

Technical Field

[0001] The invention belongs to the technical field of petroleum combustion detection equipment, in particular to an intelligent petroleum burner state monitoring and early warning device. Background Art

[0002] The petrochemical industry involves flammable, explosive or toxic gases in the production and management process. These gases can pose a serious threat to life and property safety. Therefore, real-time monitoring and early warning of the status of oil burners are particularly important. At the same time, as an important equipment in the petrochemical industry, the operating status of oil burners directly affects production efficiency and product quality.

[0003] For detection and early warning devices, especially those intelligent oil burner status monitoring and early warning devices deployed in the petrochemical industry, regular inspection and maintenance are the key links to ensure their long-term stable operation and prevent failures.

[0004] When flammable and explosive gas leaks accompanied by open flames during the production process of the petrochemical industry, the hot gas from the combustion will continue to enter the interior of the device unimpeded, causing the temperature inside the device to rise sharply, posing a serious threat to key equipment such as internal monitors. The continuous high temperature environment will accelerate the aging and damage of the electronic components inside the monitor, reducing its performance and reliability. In extreme cases, high temperature may even directly cause the monitor to fail, thereby losing the ability to monitor and warn of the burner status in real time. Due to the continuous damage of hot gas to equipment such as monitors, the life of these devices will be shortened, requiring more frequent repairs and replacements, which not only increases maintenance costs, but may also affect production progress and efficiency. Therefore, it needs to be improved and optimized. Summary of the invention

[0005] In order to solve the problem in the above background technology that when flammable and explosive gases leak with open flames in the petrochemical industry, the internal monitor of the device faces the risk of high temperature damage, the present invention provides an intelligent oil burner status monitoring and early warning device.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an intelligent petroleum burner status monitoring and early warning device, comprising a protection box, a monitor is fixedly installed on the inner wall of the protection box, a fixing plate is arranged below the monitor, the fixing plate is fixedly connected to the inner wall of the protection box, an air bag is arranged inside the fixing plate, a traction plate is fixedly installed on one side of the air bag, a fixed pulley is fixedly installed on the inner wall of the protection box, a plurality of ventilation holes are opened at the bottom of the protection box, a telescopic plate is slidably installed on the bottom inner wall of the protection box, the telescopic plate and the traction plate are connected by a round rope transmission, and the round rope is in contact with the fixed pulley.

[0007] Preferably, a moving block is provided on the back side of the protection box, and rectangular plates are respectively provided on the top and bottom of the moving block, and the two rectangular plates are respectively fixedly connected to the moving block by a plurality of nuts and bolts, and a rectangular top block is fixedly installed on the top of the rectangular plate located below, and vertical plates are fixedly installed on the sides of the two rectangular plates close to each other, and a mounting groove is opened on one side of the vertical plate, and a screw rod is rotatably installed on the inner wall of the mounting groove, and a slider is threadedly sleeved on the outer wall of the screw rod, a clamping plate 1 is fixedly installed on the front side of the slider, and a clamping plate 2 is fixedly installed on the front side of the vertical plate, and latch columns are respectively fixedly installed on the sides of the clamping plate 1 and the clamping plate 2 close to each other.

[0008] Preferably, a mounting block is fixedly mounted on the back of the protection box, latch grooves are respectively provided on both sides of the mounting block, the two latch columns are respectively slidably connected to the corresponding latch grooves, and the clamping plate 1 and the clamping plate 2 are both in contact with both sides of the moving block.

[0009] Preferably, two rectangular limiting grooves and two arc-shaped limiting grooves are formed on the back side of the vertical plate, the two rectangular limiting grooves are located in the middle of the two arc-shaped limiting grooves, and the mounting groove is located in the middle of the two rectangular limiting grooves.

[0010] Preferably, two cylinders are fixedly mounted on the back of the clamping plate 1, the two cylinders respectively penetrate the corresponding arc-shaped limiting grooves and are slidably connected to the corresponding arc-shaped limiting grooves, and the two cylinders are fixedly connected to the front side of the screw rod.

[0011] Preferably, two convex blocks are fixedly mounted on the front side of the sliding block, and the two convex blocks are respectively matched with the corresponding rectangular limiting grooves and are slidably connected with the corresponding rectangular limiting grooves.

[0012] Preferably, a first connecting rod is hingedly mounted on the back of the vertical plate, a second connecting rod is hingedly mounted on the inner wall of the screw rod, and the second connecting rod is hingedly mounted to the slider.

[0013] Preferably, a plurality of reinforcing ribs are fixedly installed on the front side of the moving block, and the plurality of reinforcing ribs are divided into two groups, one group is located at the top of the front side of the moving block, and the other group is located at the bottom of the front side of the moving block, and the two groups of reinforcing ribs are in contact with the corresponding rectangular plates respectively.

[0014] Preferably, a threaded rod is threadedly installed on the inner wall of the moving block, and a limit sliding rod is slidably installed on the inner wall of the moving block, and the limit sliding rod and the threaded rod both penetrate the moving block.

[0015] Preferably, a sliding groove is provided at the bottom of the fixing plate, and the traction plate passes through the sliding groove and is slidably connected to the sliding groove.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention arranges an airbag. During the process of the airbag expanding due to heat, a traction plate is fixedly installed on one side of the airbag. The traction plate is connected to the fixed pulley and the vent hole on the inner wall of the protection box through a round rope, thereby forming an ingenious transmission system. When the airbag expands, the traction plate will move accordingly, and through the transmission action of the round rope, the vent hole at the bottom of the protection box is quickly closed, which not only effectively blocks the hot air from the combustion from continuously entering the interior of the protection box and prevents the situation from further deteriorating, but also greatly reduces the safety risks such as explosion caused by the accumulation of hot air.

[0017] The present invention realizes the control of the clamping plate 1 and the clamping plate 2 through the threaded connection of the screw rod and the slider, and can easily clamp and fix the protection box. When disassembly or maintenance is required, the slider can be moved along the axis direction of the screw rod by simply rotating the screw rod, driving the clamping plate 1 to approach or move away from the clamping plate 2, thereby realizing the quick release or clamping of the protection box. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the explosion structure of the protection box and the moving block of the present invention; Figure 3 This is a schematic diagram of the protection box structure of the present invention; Figure 4 This is a schematic diagram of the ventilation hole structure of the present invention; Figure 5 This is a schematic diagram of the rectangular plate structure of the present invention; Figure 6 It is a schematic diagram of the round rope structure of the present invention; Figure 7 It is a structural schematic diagram of the connecting rod 1 and the connecting rod 2 of the present invention; Figure 8 This is a schematic diagram of the rectangular limit groove structure of the present invention; Fig. 9 It is a schematic diagram of the local explosion structure of the present invention.

[0019] In the figure: 1. protection box; 101. mounting block; 1011. latch slot; 102. monitor; 103. fixing plate; 1031. sliding slot; 104. airbag; 1041. traction plate; 105. fixed pulley; 106. round rope; 107. telescopic plate; 108. vent; 2. moving block; 201. rectangular plate; 2011. rectangular top block; 202. reinforcing rib; 3. vertical plate; 301. mounting slot; 302. rectangular limit slot; 303. arc limit slot; 4. screw rod; 401. slider; 4011. convex block; 5. connecting rod one; 501. connecting rod two; 6. clamping plate one; 7. clamping plate two; 8. latch column; 9. threaded rod; 10. limit slide rod. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] like Figures 1 to 9 As shown, the present invention provides an intelligent petroleum burner state monitoring and early warning device, a monitor 102 is fixedly installed on the inner wall of the protection box 1, a fixing plate 103 is arranged below the monitor 102, the fixing plate 103 is fixedly connected to the inner wall of the protection box 1, an air bag 104 is arranged inside the vertical plate 3, a traction plate 1041 is fixedly installed on one side of the air bag 104, a fixed pulley 105 is fixedly installed on the inner wall of the protection box 1, a plurality of vents 108 are opened at the bottom of the protection box 1, a telescopic plate 107 is slidably installed on the inner wall of the bottom of the protection box 1, the telescopic plate 107 and the traction plate 1041 are connected by a round rope 106 for transmission, and the round rope 106 is in contact with the fixed pulley 105.

[0022] By setting up the airbag 104, during the process of the airbag 104 expanding due to heat, a traction plate 1041 is fixedly installed on one side of the airbag, and the traction plate 1041 is connected to the fixed pulley 105 and the vent 108 on the inner wall of the protection box 1 through a round rope 106, forming an ingenious transmission system. When the airbag 104 expands, the traction plate 1041 will move accordingly, and through the transmission action of the round rope 106, the vent 108 at the bottom of the protection box 1 will be quickly closed, which not only effectively prevents the hot air from burning from continuously entering the interior of the protection box 1 and prevents the situation from further deteriorating, but also greatly reduces the safety risks such as explosion caused by heat accumulation.

[0023] like Figures 7 to 9 As shown, it includes a protection box 1, a moving block 2 is arranged on the back of the protection box 1, and rectangular plates 201 are respectively arranged on the top and bottom of the moving block 2, the two rectangular plates 201 are respectively fixedly connected to the moving block 2 by a plurality of nuts and bolts, and a rectangular top block 2011 is fixedly installed on the top of the rectangular plate 201 located at the bottom, and vertical plates 3 are fixedly installed on the sides of the two rectangular plates 201 close to each other, and a mounting groove 301 is opened on one side of the vertical plate 3, a screw rod 4 is rotatably installed on the inner wall of the mounting groove 301, and a slider 401 is threadedly sleeved on the outer wall of the screw rod 4, a clamping plate 1 6 is fixedly installed on the front of the slider 401, and a clamping plate 2 7 is fixedly installed on the front of the vertical plate 3, and a latch column 8 is respectively fixedly installed on the sides of the clamping plate 1 6 and the clamping plate 2 7 close to each other.

[0024] By fixing rectangular plates 201 on the top and bottom of the moving block 2 respectively, and the two moving blocks 2 are tightly connected to the moving block 2 by nuts and bolts, the stability and reliability of the entire structure are ensured. A rectangular top block 2011 is also fixed on the top of the rectangular plate 201 located below, which not only enhances the strength of the structure, but also provides convenience for subsequent clamping and fixing. The vertical plates 3 are respectively fixedly installed on the side where the two rectangular plates 201 are close to each other, providing necessary support for clamping the protection box 1. A mounting groove 301 is opened on one side of the vertical plate 3, so that the screw rod 4 can rotate smoothly and is connected to the slider 401 through a thread, thereby realizing precise control of the clamping plate 1 6. The screw rod 4 serves as a transmission component, and a slider 401 is threadedly sleeved on its outer wall. When the screw rod 4 rotates, the slider 401 will move along the axial direction of the screw rod 4, thereby driving the clamping plate 1 6 to approach or move away from the clamping plate 2 7, thereby realizing the clamping and fixing of the protection box 1. The clamping plate 1 6 and the clamping plate 2 7 are respectively fixed with latch columns 8 on the sides where the clamping plate 1 6 and the clamping plate 2 7 are close to each other. When the clamping plate 1 6 and the clamping plate 2 7 are tightly fitted, the latch columns 8 will be inserted into the corresponding latch holes, thereby achieving a firm fixation of the protective box 1.

[0025] like Figure 5 As shown, a mounting block 101 is fixedly installed on the back of the protective box 1, and latch grooves 1011 are respectively opened on both sides of the mounting block 101. Two latch columns 8 are slidingly connected to the corresponding latch grooves 1011 respectively, and the clamping plate 1 6 and the clamping plate 2 7 are both in contact with both sides of the moving block 2.

[0026] Latch grooves 1011 are provided on both sides of the mounting block 101, and the two latch grooves 1011 are slidably connected with the corresponding latch columns 8, ensuring that the latch columns 8 can move steadily and smoothly in the latch grooves 1011, and making the entire device more secure and reliable when connected and fixed.

[0027] like Figures 7 to 9 As shown, two rectangular limit grooves 302 and two arc-shaped limit grooves 303 are provided on the back of the vertical plate 3, the two rectangular limit grooves 302 are located in the middle of the two arc-shaped limit grooves 303, the mounting groove 301 is located in the middle of the two rectangular limit grooves 302, two cylinders are fixedly installed on the back of the clamping plate 6, the two cylinders respectively penetrate the corresponding arc-shaped limit grooves 303 and are slidably connected with the corresponding arc-shaped limit grooves 303, the two cylinders are fixedly connected to the front of the screw rod 4, and two convex blocks 4011 are fixedly installed on the front of the slider 401, the two convex blocks 4011 are respectively adapted to the corresponding rectangular limit grooves 302 and are slidably connected with the corresponding rectangular limit grooves 302.

[0028] By providing two rectangular limit grooves 302 and two arc limit grooves 303, the two rectangular limit grooves 302 are arranged in the middle position of the two arc limit grooves 303, so that the overall structure is more compact and reasonable, and the two cylinders are fixedly installed on the back side of the clamping plate 6, the two cylinders not only respectively penetrate the corresponding arc limit grooves 303 and are slidably connected with the arc limit grooves 303, thereby realizing flexible adjustment of the clamping plate 6, but the two cylinders are also fixedly connected with the front side of the screw rod 4, so that the rotation of the screw rod 4 can drive the clamping plate 6 to move, and the two convex blocks 4011 are fixedly installed on the front side of the slider 401, the two convex blocks 4011 are respectively adapted to the corresponding rectangular limit grooves 302, and are slidably connected with the rectangular limit grooves 302, which not only limits the moving direction of the slider 401, but also ensures the stability and smoothness of the slider 401 during the movement.

[0029] like Figure 7 As shown, a connecting rod 1 5 is hingedly installed on the back of the vertical plate 3 , a connecting rod 2 501 is hingedly installed on the inner wall of the screw rod 4 , and the connecting rod 2 501 is hingedly installed with the slider 401 .

[0030] Through the hinged action of connecting rod 1 5 and connecting rod 2 501, when the slider 401 moves along the axis of the screw rod 4, connecting rod 1 5 and connecting rod 2 501 rotate along the hinged point. When connecting rod 1 5 and connecting rod 2 501 contact the rectangular top block 2011, the slider 401 cannot continue to move. At this time, the clamping plate 1 6 and the clamping plate 2 7 on the moving block 2 have clamped and fixed the mounting block 101.

[0031] like Figure 1 to Figure 2 As shown, a plurality of reinforcing ribs 202 are fixedly installed on the front of the moving block 2. The plurality of reinforcing ribs 202 are divided into two groups, one group is located at the top of the front of the moving block 2, and the other group is located at the bottom of the front of the moving block 2. The two groups of reinforcing ribs 202 are in contact with the corresponding rectangular plates 201 respectively.

[0032] The introduction of the reinforcing ribs 202 significantly enhances the structural strength of the moving block 2. By adding an additional supporting structure, the moving block 2 can be more stable when subjected to external pressure or impact force and is less likely to be deformed or damaged, thereby ensuring the stability and durability of the device in harsh working environments.

[0033] like Figure 1 As shown, a threaded rod 9 is threadedly installed on the inner wall of the moving block 2 , and a limit slide rod 10 is slidably installed on the inner wall of the moving block 2 , and both the limit slide rod 10 and the threaded rod 9 pass through the moving block 2 .

[0034] By rotating the threaded rod 9, the moving block 2 threadedly connected to the threaded rod 9 can move vertically in the up and down directions along the axis of the threaded rod 9, so that the moving block 2 drives the protection box 1 to move. When inspection or maintenance and replacement is required, it is more convenient. By setting the limiting slide bar 10, the moving block 2 can be guided and limited to prevent the threaded rod 9 from shifting during rotation.

[0035] like Figure 6 As shown, a sliding groove 1031 is formed at the bottom of the vertical plate 3 , and the traction plate 1041 passes through the sliding groove 1031 and is slidably connected to the sliding groove 1031 .

[0036] By providing the sliding groove 1031 , the traction plate 1041 can be extended out of the fixing plate 103 , so that the expansion of the airbag 104 after being heated can drive the traction plate 1041 to move.

[0037] The working principle and use process of the present invention: By rotating the screw 4, the slider 401 can be accurately controlled to move along the axial direction of the screw 4. This movement in turn drives the clamping plate 1 6 to approach or move away from the clamping plate 2 7, thereby clamping and fixing the protective box 1. When the clamping plate 1 6 and the clamping plate 2 7 are tightly fitted, the pin column 8 will automatically be inserted into the corresponding pin groove 1011, thereby ensuring that the protective box 1 is firmly fixed.

[0038] During the production process of the petrochemical industry, the monitor 102 will continuously monitor the status of the burner and changes in the surrounding environment. If leakage of flammable and explosive gases or abnormal conditions such as open flames are detected, the monitor 102 will immediately issue a warning signal to remind the operator to take timely measures. As the burning gas increases, if hot air enters the protection box 1 through the vent 108, the monitor 102 will detect this abnormal situation in time and issue a more urgent warning signal. When the monitor 102 detects that hot air has entered the protection box 1, the airbag 104 will quickly inflate. The inflated airbag 104 closes the vent 108 at the bottom of the protection box 1 through the transmission action of the traction plate 1041 and the round rope 106, thereby effectively preventing the hot air from continuing to enter the protection box 1, and effectively protecting the monitor 102.

[0039] In an emergency, if the protective box 1 needs to be released quickly for inspection or replacement, the operator can rotate the threaded rod 9 to make the moving block 2 move vertically in the up and down directions along the axis of the threaded rod 9. In this way, the moving block 2 can drive the protective box 1 to move to a position convenient for inspection or replacement. Before releasing the protective box 1, the operator needs to rotate the screw rod 4 first to move the slider 401, thereby driving the clamping plate 1 6 to separate from the clamping plate 2 7. In this way, the protective box 1 can be released smoothly. After completing the inspection and replacement, the operator needs to rotate the screw rod 4 in the opposite direction to move the slider 401 along the screw rod 4, thereby adjusting the distance between the clamping plate 1 6 and the clamping plate 2 7. When the clamping plate 1 6 and the clamping plate 2 7 are tightly fitted again, the pin column 8 will automatically be inserted into the corresponding pin slot 1011 to achieve a firm fixation of the protective box 1. Finally, the operator needs to move the protective box 1 back to its original position.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent petroleum burner state monitoring and early warning device, comprising a protection box (1), characterized in that: A monitor (102) is fixedly mounted on the inner wall of the protection box (1), a fixed plate (103) is arranged below the monitor (102), the fixed plate (103) is fixedly connected to the inner wall of the protection box (1), an air bag (104) is arranged inside the fixed plate (103), a traction plate (1041) is fixedly mounted on one side of the air bag (104), a fixed pulley (105) is fixedly mounted on the inner wall of the protection box (1), a plurality of ventilation holes (108) are provided at the bottom of the protection box (1), a telescopic plate (107) is slidably mounted on the inner wall of the bottom of the protection box (1), the telescopic plate (107) and the traction plate (1041) are connected to each other by a round rope (106), and the round rope (106) is in contact with the fixed pulley (105).

2. The intelligent petroleum burner state monitoring and early warning device according to claim 1 is characterized in that: A moving block (2) is arranged on the back of the protection box (1), and rectangular plates (201) are arranged on the top and bottom of the moving block (2), respectively. The two rectangular plates (201) are fixedly connected to the moving block (2) by a plurality of nuts and bolts, respectively. A rectangular top block (2011) is fixedly installed on the top of the rectangular plate (201) located at the bottom, and a vertical plate (3) is fixedly installed on the sides of the two rectangular plates (201) close to each other. A mounting groove (301) is opened on one side of the vertical plate (3), and a screw rod (4) is rotatably installed on the inner wall of the mounting groove (301). A slider (401) is threadedly sleeved on the outer wall of the screw rod (4), and a clamping plate 1 (6) is fixedly installed on the front of the slider (401). A clamping plate 2 (7) is fixedly installed on the front of the vertical plate (3), and a latch column (8) is fixedly installed on the sides of the clamping plate 1 (6) and the clamping plate 2 (7) close to each other.

3. The intelligent petroleum burner state monitoring and early warning device according to claim 2 is characterized in that: A mounting block (101) is fixedly mounted on the back of the protection box (1), and latch grooves (1011) are respectively provided on both sides of the mounting block (101), and the two latch columns (8) are respectively slidably connected to the corresponding latch grooves (1011), and the clamping plate 1 (6) and the clamping plate 2 (7) are both in contact with both sides of the moving block (2).

4. The intelligent petroleum burner state monitoring and early warning device according to claim 2 is characterized in that: The back side of the vertical plate (3) is provided with two rectangular limiting grooves (302) and two arc-shaped limiting grooves (303); the two rectangular limiting grooves (302) are located in the middle of the two arc-shaped limiting grooves (303); and the mounting groove (301) is located in the middle of the two rectangular limiting grooves (302).

5. The intelligent petroleum burner state monitoring and early warning device according to claim 4 is characterized in that: Two cylinders are fixedly mounted on the back of the clamping plate 1 (6), the two cylinders respectively penetrate the corresponding arc-shaped limit grooves (303) and are slidably connected to the corresponding arc-shaped limit grooves (303), and the two cylinders are fixedly connected to the front of the screw rod (4).

6. The intelligent petroleum burner state monitoring and early warning device according to claim 4 is characterized in that: Two convex blocks (4011) are fixedly mounted on the front side of the sliding block (401), and the two convex blocks (4011) are respectively matched with corresponding rectangular limiting grooves (302) and are slidably connected with the corresponding rectangular limiting grooves (302).

7. The intelligent petroleum burner state monitoring and early warning device according to claim 2 is characterized in that: A connecting rod 1 (5) is hingedly mounted on the back of the vertical plate (3), a connecting rod 2 (501) is hingedly mounted on the inner wall of the screw rod (4), and the connecting rod 2 (501) is hingedly mounted on the slider (401).

8. The intelligent petroleum burner state monitoring and early warning device according to claim 2 is characterized in that: A plurality of reinforcing ribs (202) are fixedly mounted on the front face of the moving block (2); the plurality of reinforcing ribs (202) are divided into two groups, one group being located at the top of the front face of the moving block (2), and the other group being located at the bottom of the front face of the moving block (2); the two groups of reinforcing ribs (202) are in contact with corresponding rectangular plates (201), respectively.

9. The intelligent petroleum burner state monitoring and early warning device according to claim 2 is characterized in that: A threaded rod (9) is threadedly mounted on the inner wall of the moving block (2), and a limit sliding rod (10) is slidably mounted on the inner wall of the moving block (2), and both the limit sliding rod (10) and the threaded rod (9) penetrate the moving block (2).

10. The intelligent petroleum burner state monitoring and early warning device according to claim 1 is characterized in that: A sliding groove (1031) is provided at the bottom of the fixing plate (103), and the traction plate (1041) passes through the sliding groove (1031) and is slidably connected to the sliding groove (1031).

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