A fixing device and usage method for a steam drum armored thermocouple

Abstract

The present invention relates to a fixing device for a steam drum armored thermocouple, which includes an adsorption fixing part and a fixing wedge. A magnet is provided at the bottom of the adsorption fixing part for adsorbing and fixing on the outer wall of the boiler steam drum. A fitting groove adapted to the fixing wedge is provided at the bottom of the adsorption fixing part, and the fixing wedge is embedded in the fitting groove of the adsorption fixing part. A fixing groove for fixing the measuring end of the armored thermocouple is provided at the bottom of the fixing wedge, and the measuring end of the armored thermocouple is fixed in the fixing groove and contacts the boiler steam drum. The armored thermocouple is outside the steam drum, and the measuring end is electrically connected to the main body of the armored thermocouple through a compensating wire. The present invention also discloses a using method of the fixing device for the steam drum armored thermocouple. The present invention has the advantages of simple structure, convenient use and maintenance, requires fewer operating personnel, and effectively improves the maintenance and replacement efficiency of the armored thermocouple.

Description

Technical Field

[0001] The present invention relates to a thermocouple, and more particularly to a fixing device and a using method for a sheathed thermocouple of a steam drum. Background Art

[0002] In large steel enterprises with power generation capabilities, boilers for power generation are important equipment. In order to detect whether the temperature of the boiler meets the standard, sheathed thermocouples are generally installed on-site in the boiler. The installation method of the sheathed thermocouple adopts a close-range winding installation (as shown in Figure 1 ), that is, the sheathed thermocouple and the compensating wire connected thereto are wound around the side of the boiler. However, this installation method is very unfavorable for later fault inspection and equipment replacement. Because the operation of the boiler needs to be stopped before replacement and inspection, and at the same time, personnel cooperation is required to build scaffolding and remove the insulation layer, which greatly wastes manpower and material resources and directly affects the continuous and effective operation of the power generation process.

[0003] At present, the winding installation of the sheathed thermocouple has the following disadvantages: First, the outer shell of the sheathed thermocouple is made of stainless steel and is difficult to bend, so that the sheathed thermocouple cannot better adhere to the wall of the steam drum for temperature measurement; Second, the temperature at the installation position of the thermocouple head is high, which easily oxidizes the wiring terminal and increases the inaccuracy of temperature measurement; Third, the large-scale winding installation of the sheathed thermocouple and its compensating wire on the side of the boiler makes the inspection and replacement of the sheathed thermocouple very cumbersome, and a large range of insulation layer needs to be removed.

[0004] However, the damage rate and failure rate of the sheathed thermocouple used for detecting the boiler temperature are relatively high. Each time the boiler is shut down or overhauled annually, a new sheathed thermocouple needs to be replaced. Due to the current winding installation method of the sheathed thermocouple, the disassembly and assembly process is time-consuming and laborious, requiring multiple people to cooperate. Coupled with the harsh environmental conditions, a large amount of manpower and material resources need to be consumed annually for maintenance, and the maintenance workload is large, seriously affecting the maintenance efficiency of instrument maintenance personnel. Therefore, it is necessary to propose a new fixing device for the sheathed thermocouple to solve the above problems. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a fixing device and a using method for a sheathed thermocouple of a steam drum, which have the advantages of simple structure, convenient use and maintenance, require fewer operating personnel, and effectively improve the maintenance and replacement efficiency of the sheathed thermocouple.

[0006] The above technical object of the present invention is achieved through the following technical solutions:

[0007] A fixing device for a sheathed thermocouple of a steam drum includes an adsorption fixing part and a fixing wedge. A magnet is provided at the bottom of the adsorption fixing part, and it is adsorbed and fixed on the outer wall of the boiler steam drum;

[0008] A fitting groove adapted to the fixing wedge is provided at the bottom of the adsorption fixing part. The fixing wedge is embedded in the fitting groove of the adsorption fixing part. A fixing groove for fixing the measuring end of the armored thermocouple is provided at the bottom of the fixing wedge. The measuring end of the armored thermocouple is fixed in the fixing groove and contacts the boiler steam drum. The armored thermocouple is outside the steam drum, and the measuring end is electrically connected to the main body of the armored thermocouple through a compensating wire.

[0009] In one embodiment, the cross-section of the fixing wedge is an inverted trapezoid, and the cross-section of the fitting groove of the adsorption fixing part is also an inverted trapezoid. The fixing wedge and the adsorption fixing part are in interference fit;

[0010] The fixing groove is at the bottom of the fixing wedge, and the cross-section of the fixing groove is semicircular, which is adapted to the shape of the measuring end of the armored thermocouple; the depth of the fixing groove is less than or equal to the thickness of the measuring end. When the adsorption fixing part contacts the outer wall of the boiler steam drum, the measuring end closely adheres to the outer wall of the boiler steam drum.

[0011] In one embodiment, limiting wire groove parts for facilitating the passing of the compensating wire are respectively provided at both ends of the adsorption fixing part. The bottom end of the limiting wire groove part faces the fixing wedge, and the top end of the limiting wire groove part faces above the adsorption fixing part.

[0012] In one embodiment, the limiting wire groove part is hinged to the adsorption fixing part to facilitate adjusting the inclination angle of the limiting wire groove part.

[0013] In one embodiment, the adsorption fixing part is further provided with a disassembly and assembly bracket. Both ends of the disassembly and assembly bracket are respectively hinged to the middle part of the side surface of the adsorption fixing part. A threaded through hole for pushing the fixing wedge is provided in the middle of the disassembly and assembly bracket. A screw passes through the disassembly and assembly bracket and abuts against the fixing wedge to push the fixing wedge into the fitting groove or push the fixing wedge out of the fitting groove.

[0014] In one embodiment, the rotation angle of the disassembly and assembly bracket is 0 - 180°.

[0015] In one embodiment, a placement groove for receiving the screw is provided at the top end of the adsorption fixing part.

[0016] A usage method of a fixing device for a steam drum armored thermocouple is as follows:

[0017] Installation: Adsorb and fix the adsorption fixing part on the outer side wall of the boiler steam drum. Among them, the fitting groove faces the outer side wall. Fix the measuring end of the armored thermocouple to the fixing wedge. Dock the fixing wedge along the outer side of the boiler steam drum with the fitting groove of the adsorption fixing part. The fixing wedge is embedded in the fitting groove. At this time, the measuring end of the armored thermocouple is in close contact with the outer side wall of the boiler steam drum. The compensating wire of the measuring end passes through the limit wire groove part and is electrically connected to the main body of the armored thermocouple. The main body of the armored thermocouple is electrically connected to the control system through the compensating wire. Among them, a quick connector is arranged between the main body of the armored thermocouple and the control system;

[0018] Then cover the insulation layer outside the boiler steam drum. The adsorption fixing part, the fixing wedge and the measuring end of the armored thermocouple are between the insulation layer and the boiler steam drum;

[0019] Disassembly and replacement: First, separate the main body of the armored thermocouple from the control system through the quick connector. Only remove the insulation layer above the adsorption fixing part to expose the adsorption fixing part and the fixing wedge. Take out the fixing wedge from the adsorption fixing part and separate the measuring end of the armored thermocouple from the fixing wedge to complete the disassembly of the armored thermocouple. Install the new armored thermocouple according to the installation steps, and then cover the insulation layer above the adsorption fixing part again.

[0020] In one embodiment, in the installation step, when the adsorption fixing part is connected to the fixing wedge, first embed one end of the fixing wedge into the fitting groove of the adsorption fixing part, rotate the disassembly and assembly bracket to the horizontal state, so that the fixing wedge is between the disassembly and assembly bracket and the adsorption fixing part. Screw in the screw at the threaded through hole in the middle of the disassembly and assembly bracket. The screw abuts against the fixing wedge. Continue to rotate the screw to push the fixing wedge into the fitting groove, and then take out the screw to complete the connection between the adsorption fixing part and the fixing wedge.

[0021] In one embodiment, in the disassembly and replacement step, when disassembling the fixing wedge, rotate the disassembly and assembly bracket to the end of the fixing wedge without compensating wire. Screw in the screw at the threaded through hole in the middle of the disassembly and assembly bracket. The screw abuts against the fixing wedge. Continue to rotate the screw to push the fixing wedge out of the adsorption fixing part, and then take out the screw to complete the removal of the adsorption fixing part and the fixing wedge.

[0022] In summary, the present invention has the following beneficial effects:

[0023] The present invention directly fixes the measuring end of the armored thermocouple on the surface of the boiler steam drum through the adsorption fixing part and the fixing wedge, so that the measuring end is in close contact with the steam drum, which is beneficial to improving the accuracy of temperature measurement. Since the fixed position of the measuring end of the present invention is greatly reduced, it is beneficial to the later maintenance and replacement of the armored thermocouple. The number of operators required is small, and the efficiency of maintaining and replacing the armored thermocouple is effectively improved. Brief Description of the Drawings

[0024] Figure 1 is a schematic diagram of the installation of a conventional armored thermocouple;

[0025] Figure 2 is a schematic diagram of the installation of the armored thermocouple of the present invention;

[0026] Figure 3 is a schematic diagram of the adsorption fixing part and the fixing wedge of the present invention;

[0027] Figure 4 is a top view schematic diagram of the adsorption fixing part of the present invention provided with a limit wire groove part and a disassembly and assembly bracket.

[0028] In the figure: 1 - armored thermocouple, 2 - steam drum, 3 - heat insulation layer, 4 - adsorption fixing part, 5 - quick connector, 6 - control system, 7 - fixing wedge, 8 - limit wire groove part, 9 - disassembly and assembly bracket, 10 - threaded through hole, 11 - placement groove. Detailed implementation manners

[0029] The present invention will be described in detail below with reference to the drawings and embodiments.

[0030] It should be noted that the orientation words such as "upper" and "lower" involved in this article are determined relative to the perspective of the drawings, and are only for the convenience of description and cannot be construed as a limitation to the technical solution.

[0031] In conventional operations, the installation method of the armored thermocouple 1 at the steam drum 2 of the boiler is to wind the measuring end of the armored thermocouple 1 and the corresponding compensating wire around the steam drum 2 of the boiler, aiming to fix the measuring end on the outer wall of the steam drum 2 of the boiler. However, the outer shell of the measuring end is made of alloy material and is not easy to bend. Therefore, the measuring end cannot be closely attached to the outer wall of the steam drum 2 of the boiler, which affects the measurement effect. Moreover, obviously, this winding installation method is not conducive to later maintenance and replacement. Because once a new armored thermocouple 1 needs to be replaced, the heat insulation layer 3 at the position where the measuring end and the compensating wire are wound needs to be removed. The removal area is very large, and the heat insulation layer 3 to be removed surrounds the side of the steam drum 2, and the removal difficulty is also relatively large. Moreover, the difficulty of reinstalling the measuring end later is also relatively large.

[0032] As Figures 1 - 4 shown, in view of the defects existing in the conventional installation method of the armored thermocouple 1, the present invention proposes a fixing device for the steam drum armored thermocouple, including an adsorption fixing part 4 and a fixing wedge 7. A magnet is provided at the bottom of the adsorption fixing part 4, and it is adsorbed and fixed on the outer wall of the steam drum 2 of the boiler;

[0033] A fitting groove adapted to the fixing wedge 7 is provided at the bottom of the adsorption fixing part 4. The fixing wedge 7 is embedded in the fitting groove of the adsorption fixing part 4. A fixing groove for fixing the measuring end of the armored thermocouple 1 is provided at the bottom of the fixing wedge 7. The measuring end of the armored thermocouple 1 is fixed in the fixing groove and is in contact with the boiler steam drum 2. The armored thermocouple 1 is outside the steam drum 2, and the measuring end is electrically connected to the main body of the armored thermocouple 1 through a compensating wire.

[0034] Specifically, the adsorption fixing part 4 is connected to the outer wall of the steam drum 2 for a long time, and the adsorption fixing part 4 is generally not disassembled. In order to facilitate the fixing of the measuring end, the present invention provides a fitting groove on the bottom surface of the adsorption fixing part 4, that is, the surface in contact with the steam drum 2. Specifically, the cross-section of the fitting groove is also an inverted trapezoid, that is, a quadrangular prism with a trapezoidal bottom surface. As Figure 3 shown, the cross-section of the fixing wedge 7 is also an inverted trapezoid with the upper base larger than the lower base. The fixing wedge 7 and the adsorption fixing part 4 can be in interference fit, clearance fit or transition fit. When the fixing wedge 7 and the adsorption fixing part 4 are in interference fit, the material requirement of the fixing wedge 7 is mainly high temperature resistance. When the fixing wedge 7 and the adsorption fixing part 4 are in clearance fit or transition fit, in addition to being made of high temperature resistant material, the fixing wedge 7 also needs to be a magnetically adsorbable material to facilitate the stable connection between the fixing wedge 7 and the adsorption fixing part 4.

[0035] A fixing groove is also provided at the bottom of the fixing wedge 7 for fixing the measuring end of the armored thermocouple 1. It should be noted that the depth of the fixing groove is less than or equal to the thickness of the measuring end. Preferably, the depth of the fixing groove is equal to the thickness of the measuring end. When the adsorption fixing part 4 is in contact with the outer wall of the boiler steam drum 2, the measuring end is in close contact with the outer wall of the boiler steam drum 2. The fixing wedge 7 and the measuring end can be connected by red glue. Red glue is a polyolefin compound that cures when heated. Among them, as Figure 3 shown, the cross-section of the fixing groove is semi-circular and is adapted to the shape of the measuring end of the armored thermocouple 1.

[0036] When installing the measuring end of the armored thermocouple 1, first connect the measuring end of the armored thermocouple 1 to the fixing wedge 7, and then insert the fixing wedge 7 into the fitting groove of the adsorption fixing part 4 to fix the measuring end on the outer side wall of the boiler steam drum 2, and the measuring end is close to the outer side wall of the boiler steam drum 2 to ensure the measurement accuracy. Since there is no need to wind around the steam drum 2, the terminal of the connection between the measuring end and the compensating wire does not directly contact the steam drum 2, effectively reducing the oxidation of the terminal and also being beneficial to improving the temperature measurement accuracy.

[0037] Furthermore, both ends of the adsorption fixing part 4 are respectively provided with limiting wire groove parts 8 facilitating the passing of compensating wires. The bottom end of the limiting wire groove part 8 faces the fixing wedge 7, and the top end of the limiting wire groove part 8 faces above the adsorption fixing part 4. Moreover, the limiting wire groove part 8 is hinged to the adsorption fixing part 4 to facilitate adjusting the inclination angle of the limiting wire groove part 8.

[0038] Specifically, the function of the limiting wire groove part 8 is to arrange the routing of the compensating wires, preventing the compensating wires from being randomly stacked under the heat insulation layer 3. After the connection between the fixing wedge 7 and the adsorption fixing part 4 is completed, one end of the compensating wire can be passed through the limiting wire groove part 8 and connected to the measuring end.

[0039] Furthermore, the adsorption fixing part 4 is also provided with a disassembly and assembly bracket 9. Both ends of the disassembly and assembly bracket 9 are respectively hinged to the middle of the side surface of the adsorption fixing part 4. The rotation angle of the disassembly and assembly bracket 9 is 0 - 180°. A threaded through hole 10 for pushing the fixing wedge 7 is provided in the middle of the disassembly and assembly bracket 9. A screw passes through the disassembly and assembly bracket 9 and abuts against the fixing wedge 7 to push the fixing wedge 7 into the fitting groove or push the fixing wedge 7 out of the fitting groove. Among them, the disassembly and assembly bracket 9 is detachably connected to the adsorption fixing part 4.

[0040] Specifically, the function of the disassembly and assembly bracket 9 is to cooperate with the screw to push the fixing wedge 7 into or out of the adsorption fixing part 4. The rotation angle of the disassembly and assembly bracket 9 of 0 - 180° is with reference to the adsorption fixing part 4. When the rotation angle of the disassembly and assembly bracket 9 is 0° or 180°, the disassembly and assembly bracket 9 is exactly at one end of the adsorption fixing part 4. The length of the disassembly and assembly bracket 9 is at least greater than the sum of the length of the fixing wedge 7 and half of the length of the adsorption fixing part 4. The length of the screw is at least greater than the length of the adsorption fixing part 4.

[0041] Furthermore, a placing groove 11 for storing the screw is provided at the top end of the adsorption fixing part 4 to prevent the screw from being lost.

[0042] The present invention also provides a using method of the fixing device for the steam drum armored thermocouple, and the specific steps are as follows:

[0043] Installation: Adsorb and fix the adsorption fixing part 4 on the outer side wall of the boiler steam drum 2. Among them, the fitting groove faces the outer side wall. Fix the measuring end of the armored thermocouple 1 to the fixing wedge 7. Align the fixing wedge 7 along the outer side surface of the boiler steam drum 2 with the fitting groove of the adsorption fixing part 4, and the fixing wedge 7 is embedded in the fitting groove. At this time, the measuring end of the armored thermocouple 1 is in close contact with the outer side wall of the boiler steam drum 2. The compensating wire at the measuring end passes through the limiting wire groove part 8 and is electrically connected to the main body of the armored thermocouple 1. The main body of the armored thermocouple 1 is electrically connected to the control system 6 through the compensating wire. Among them, a quick joint 5 is provided between the main body of the armored thermocouple 1 and the control system 6;

[0044] Then, a heat insulation layer 3 is covered outside the boiler steam drum 2, and the measuring ends of the adsorption fixing part 4, the fixing wedge 7 and the armored thermocouple 1 are located between the heat insulation layer 3 and the boiler steam drum 2;

[0045] Disassembly and replacement: First, separate the main body of the armored thermocouple 1 from the control system 6 through the quick connector 5. Only remove the heat insulation layer 3 above the adsorption fixing part 4 to expose the adsorption fixing part 4 and the fixing wedge 7. Take out the fixing wedge 7 from the adsorption fixing part 4, separate the measuring end of the armored thermocouple 1 from the fixing wedge 7 to complete the disassembly of the armored thermocouple 1. Then, install the new armored thermocouple 1 according to the installation steps, and re-cover the heat insulation layer 3 above the adsorption fixing part 4.

[0046] In the installation steps, when the adsorption fixing part 4 is connected to the fixing wedge 7, first embed one end of the fixing wedge 7 into the fitting groove of the adsorption fixing part 4, rotate the disassembly and assembly bracket 9 to the horizontal state, so that the fixing wedge 7 is located between the disassembly and assembly bracket 9 and the adsorption fixing part 4. Screw in the screw rod at the threaded through hole 10 in the middle of the disassembly and assembly bracket 9. The screw rod abuts against the fixing wedge 7. Continue to rotate the screw rod to push the fixing wedge 7 into the fitting groove, and then take out the screw rod to complete the connection between the adsorption fixing part 4 and the fixing wedge 7.

[0047] In the disassembly and replacement steps, when disassembling the fixing wedge 7, rotate the disassembly and assembly bracket 9 to the end of the fixing wedge 7 without supplementary wires. Screw in the screw rod at the threaded through hole 10 in the middle of the disassembly and assembly bracket 9. The screw rod abuts against the fixing wedge 7. Continue to rotate the screw rod to push the fixing wedge 7 out of the adsorption fixing part 4, and then take out the screw rod to complete the disassembly of the adsorption fixing part 4 and the fixing wedge 7.

[0048] The above is only the preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A fixing device for a steam drum armored thermocouple, characterized in that, it includes an adsorption fixing part (4) and a fixing wedge (7). A magnet is provided at the bottom of the adsorption fixing part (4) and is adsorbed and fixed on the outer wall of the boiler steam drum (2); a fitting groove adapted to the fixing wedge (7) is provided at the bottom of the adsorption fixing part (4). The fixing wedge (7) is embedded in the fitting groove of the adsorption fixing part (4). A fixing groove for fixing the measuring end of the armored thermocouple (1) is provided at the bottom of the fixing wedge (7). The measuring end of the armored thermocouple (1) is fixed in the fixing groove and is in contact with the boiler steam drum (2). The armored thermocouple (1) is outside the steam drum (2), and the measuring end is electrically connected to the main body of the armored thermocouple (1) through a compensating wire; the cross-section of the fixing wedge (7) is an inverted trapezoid, and the cross-section of the fitting groove of the adsorption fixing part (4) is also an inverted trapezoid. The fixing wedge (7) and the adsorption fixing part (4) are in interference fit; the fixing groove is at the bottom of the fixing wedge (7), and the cross-section of the fixing groove is semicircular and is adapted to the shape of the measuring end of the armored thermocouple (1); the depth of the fixing groove is less than or equal to the thickness of the measuring end. When the adsorption fixing part (4) is in contact with the outer wall of the boiler steam drum (2), the measuring end closely adheres to the outer wall of the boiler steam drum (2); the adsorption fixing part (4) is further provided with a disassembly and assembly bracket (9). The two ends of the disassembly and assembly bracket (9) are respectively hinged to the middle of the side surface of the adsorption fixing part (4). A threaded through hole (10) for pushing the fixing wedge (7) is provided in the middle of the disassembly and assembly bracket (9). A screw passes through the disassembly and assembly bracket (9) and abuts against the fixing wedge (7) to push the fixing wedge (7) into the fitting groove or push the fixing wedge (7) out of the fitting groove. The rotation angle of the disassembly and assembly bracket (9) is 0 - 180°; 2. The fixing device for a steam drum armored thermocouple according to claim 1, characterized in that, limiting wire groove parts (8) for facilitating the passing of compensating wires are respectively provided at both ends of the adsorption fixing part (4). The bottom end of the limiting wire groove part (8) faces the fixing wedge (7), and the top end of the limiting wire groove part (8) faces above the adsorption fixing part (4); 3. The fixing device for a steam drum armored thermocouple according to claim 2, characterized in that, the limiting wire groove part (8) is hinged to the adsorption fixing part (4) to facilitate adjusting the inclination angle of the limiting wire groove part (8); 4. The fixing device for a steam drum armored thermocouple according to claim 1, characterized in that, a placing groove (11) for receiving the screw is provided at the top end of the adsorption fixing part (4); 5. A using method of a fixing device for a steam drum armored thermocouple, applicable to the fixing device for a steam drum armored thermocouple according to claim 1, characterized in that, the specific steps are as follows: Installation: Adsorb and fix the adsorption fixing part (4) on the outer wall of the boiler drum (2). Among them, the fitting groove faces the outer wall. Fix the measuring end of the armored thermocouple (1) to the fixing wedge (7). Align the fixing wedge (7) with the fitting groove of the adsorption fixing part (4) along the outer side of the boiler drum (2). The fixing wedge (7) is inserted into the fitting groove. At this time, the measuring end of the armored thermocouple (1) is in close contact with the outer wall of the boiler drum (2). The compensating wire at the measuring end passes through the limit wire groove part (8) and is electrically connected to the main body of the armored thermocouple (1). The main body of the armored thermocouple (1) is electrically connected to the control system (6) through the compensating wire. Among them, a quick connector (5) is arranged between the main body of the armored thermocouple (1) and the control system (6); Then cover the heat insulation layer (3) outside the boiler drum (2). The adsorption fixing part (4), the fixing wedge (7) and the measuring end of the armored thermocouple (1) are located between the heat insulation layer (3) and the boiler drum (2); Disassembly and replacement: First, separate the main body of the armored thermocouple (1) from the control system (6) through the quick connector (5). Only remove the heat insulation layer (3) above the adsorption fixing part (4) to expose the adsorption fixing part (4) and the fixing wedge (7). Take out the fixing wedge (7) from the adsorption fixing part (4). Separate the measuring end of the armored thermocouple (1) from the fixing wedge (7) to complete the disassembly of the armored thermocouple (1). Install the new armored thermocouple (1) according to the installation steps, and then cover the heat insulation layer (3) above the adsorption fixing part (4).

6. The usage method according to claim 5, characterized in that, In the installation step, when the adsorption fixing part (4) is connected to the fixing wedge (7), first insert one end of the fixing wedge (7) into the fitting groove of the adsorption fixing part (4). Rotate the disassembly and assembly bracket (9) to the horizontal state so that the fixing wedge (7) is located between the disassembly and assembly bracket (9) and the adsorption fixing part (4). Screw in the screw at the threaded through hole (10) in the middle of the disassembly and assembly bracket (9). The screw abuts against the fixing wedge (7). Continue to rotate the screw to push the fixing wedge (7) into the fitting groove, and then take out the screw to complete the connection between the adsorption fixing part (4) and the fixing wedge (7).

7. The usage method according to claim 5, characterized in that, In the disassembly and replacement step, when disassembling the fixing wedge (7), rotate the disassembly and assembly bracket (9) to the end of the fixing wedge (7) without compensating wire. Screw in the screw at the threaded through hole (10) in the middle of the disassembly and assembly bracket (9). The screw abuts against the fixing wedge (7). Continue to rotate the screw to push the fixing wedge (7) out of the adsorption fixing part (4), and then take out the screw to complete the disassembly of the adsorption fixing part (4) and the fixing wedge (7).

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