Conducting and ground wire sag measuring system and method

Abstract

The system comprises a base, a supporting seat is fixedly installed at the top of the base, an equipment groove communicated with the outside is formed in the supporting seat, and a bearing mounting hole is formed in the inner bottom wall of the equipment groove formed in the supporting seat; a rolling bearing is embedded in a bearing mounting hole formed in the supporting seat, a bearing inner ring of the rolling bearing is fixedly connected with a threaded rod, and the threaded rod is connected with a driving assembly. The threaded rod is driven to rotate through the driving assembly, continuous and accurate height adjustment of the vertical observation plate is achieved in cooperation with the guiding effect of the sliding assembly, the problem that adjustment is inaccurate due to cooperation of an adjusting bolt and an internal thread adjusting hole in a comparison file is thoroughly solved, a worker can rapidly adjust an observation part to the optimal observation height, and the working efficiency is improved. The operation steps of repeated adjustment are reduced, and the measurement efficiency and the data accuracy are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power system measurement, and in particular to a conductor and ground wire sag measurement system and method. BACKGROUND

[0002] In a power system transmission line, the conductor and ground wire sag is one of the important parameters reflecting the safe operation of the line, and the size of the sag directly affects the safety distance and transmission performance of the line. Accurate measurement of the conductor and ground wire sag is of great significance to ensure the safe and stable operation of the transmission line.

[0003] The existing utility model with the publication number CN209147903U discloses a transmission line sag measurement device, which relies on a longitudinal support pipe as the main height adjustment component. The height adjustment is achieved by adjusting the cooperation between the adjusting bolt and the internal thread adjusting hole. However, this adjustment structure has obvious defects in actual application. Because of the pitch interval between the adjusting bolt and the internal thread adjusting hole, each adjustment can only achieve a fixed pitch increment of height change, and continuous and accurate fine adjustment is not possible, resulting in low height adjustment accuracy of the longitudinal support pipe. It is difficult to quickly and accurately adjust the observation component to the optimal observation height corresponding to the conductor and ground wire sag. In complex field measurement environments, this inaccurate adjustment problem is more prominent. The staff often needs to adjust repeatedly to approach the ideal observation position, which not only increases the complexity of the measurement operation, prolongs the working time of a single measurement, and reduces the measurement efficiency, but also may cause observation data deviation due to adjustment error, affecting the accuracy of the sag measurement result and bringing potential risks to the safety assessment of the transmission line. Therefore, how to design a conductor and ground wire sag measurement system and method has become a problem we need to solve. SUMMARY

[0004] The present application provides the following technical solution in view of the deficiencies of the prior art: a conductor and ground wire sag measurement system, comprising a base, a support seat is fixedly installed on the top of the base, an equipment slot is formed in the inside of the support seat and is connected with the outside, a bearing mounting hole is formed in the inner bottom wall of the equipment slot in the inside of the support seat, a rolling bearing is embedded in the bearing mounting hole in the inside of the support seat, a threaded rod is fixedly connected to the bearing inner ring of the rolling bearing, a driving assembly is connected to the threaded rod, a vertical observation plate is threadedly connected to the outer surface of the threaded rod, and sliding assemblies are arranged on the opposite sides of the vertical observation plate. The outer surface of the vertical observation plate is hinged with a transverse support rod, the inside of the transverse support rod is slidably connected with a transverse observation plate, the inside of the transverse support rod is fixedly connected with a spring, one end of the spring is fixedly installed with a moving block, the inside of the moving block is fixedly penetrated with a pull rod, the end of the pull rod close to the transverse observation plate is fixedly installed with a neodymium iron boron permanent magnet, and the upper surface of the transverse observation plate is fixedly installed with a long strip iron sheet matched with the neodymium iron boron permanent magnet.

[0005] The inside of the base is provided with a reinforcing assembly and a heat dissipation assembly for dissipating heat of the reinforcing assembly.

[0006] As an improvement of the above technical solution, the reinforcing assembly comprises an electric push rod, the electric push rod is fixedly installed on the inner top wall of the base, the vertically downward telescopic end of the electric push rod is fixedly installed with a lifting plate, the top of the lifting plate is fixedly installed with a first motor, the output end of the first motor penetrating the lifting plate is fixedly installed with a drill rod, and the bottom of the base is provided with a through groove for the drill rod to enter and exit.

[0007] As an improvement of the above technical solution, the heat dissipation assembly comprises a rotating shaft, one end of the threaded rod penetrates into the inside of the base and is fixedly connected with the rotating shaft, and the outer surface of the rotating shaft is fixedly installed with a fan blade.

[0008] As an improvement of the above technical solution, the driving assembly comprises a second motor, the second motor is fixedly connected with the inner wall of the equipment groove, the output end of the second motor is fixedly installed with a first bevel gear, the first bevel gear is meshingly connected with a second bevel gear, and the second bevel gear is connected with the threaded rod.

[0009] As an improvement of the above technical solution, the sliding assembly comprises a sliding block, one side of the sliding block is fixedly connected with the vertical observation plate, and the inner side wall of the support seat is provided with a sliding groove matched with the sliding block.

[0010] As an improvement of the above technical solution, the vertical observation plate is designed as a hollow structure, and the end of the threaded rod away from the rolling bearing is arranged in the inside of the vertical observation plate.

[0011] As an improvement of the above technical solution, the top of the transverse observation plate is fixedly installed with a fixed plate, and the fixed plate and the vertical observation plate are connected through hand bolts.

[0012] As an improvement of the above technical solution, the top of the base is movably connected with a protective cylinder cover, two hand levers are symmetrically installed on the opposite sides of the protective cylinder cover, and an elastic rubber pad is fixedly installed on the top of the protective cylinder cover.

[0013] The application also provides a method for measuring the sag of a conductor and a ground wire, which comprises the following steps, Step S1: place the base at the preset measurement position under the conductor and ground wire to be measured, operate the reinforcing assembly, start the electric push rod, make the telescopic end of the electric push rod drive the lifting plate to move vertically downward, and then drive the first motor and the drill rod to move downward, the drill rod penetrates through the through slot at the bottom of the base and contacts the ground, the first motor is started, the first motor drives the drill rod to rotate, the drill rod drills into the ground, and the fixing of the base is completed; Step S2: open the protective cylinder cover, hand-tighten the bolts to fix the fixed plate and the vertical observation plate, pull the pull rod, compress the spring with the moving block, separate the neodymium iron boron permanent magnet block from the long iron sheet, adjust the extension length of the horizontal observation plate in the horizontal support rod according to the measurement requirement, loosen the pull rod after the adjustment is completed, and the moving block drives the pull rod and the neodymium iron boron permanent magnet block to reset under the action of the spring, and the neodymium iron boron permanent magnet block is adsorbed and fixed with the long iron sheet; Step S3: start the second motor in the driving assembly, the second motor drives the first bevel gear to rotate, the first bevel gear is meshed with the second bevel gear for transmission, and then drives the threaded rod to rotate in the rolling bearing, when the threaded rod rotates, the vertical observation plate slides in the sliding groove on the inner side wall of the support seat through the sliding block of the sliding assembly, the height adjustment of the vertical observation plate is realized, and until the horizontal observation plate reaches the appropriate observation height; Step S4: during the rotation of the threaded rod, one end of the threaded rod drives the rotating shaft to rotate, the rotating shaft drives the fan blade to rotate, and the fan blade rotation generates air flow to cool the reinforcing assembly in the base; Step S5: the sag of the conductor and ground wire is observed and data recorded through the horizontal observation plate and the vertical observation plate, after the measurement is completed, the fixing of each part is removed in reverse order according to the above steps, and the protective cylinder cover is covered on the base.

[0014] The beneficial effects of the present application are as follows: 1、the present application drives the threaded rod to rotate through the driving assembly, cooperates with the guiding effect of the sliding assembly, realizes the continuous and accurate height adjustment of the vertical observation plate, solves the inaccurate adjustment problem caused by the cooperation of the adjusting bolt and the internal thread adjusting hole in the prior art, the observation component can be quickly adjusted to the best observation height by the staff, the operation steps of repeated adjustment are reduced, and the measurement efficiency and data accuracy are improved.

[0015] 2、the reinforcing assembly of the present application drives the drill rod to drill into the ground through the electric push rod, effectively enhances the stability of the base under complex terrain in the wild, avoids the measurement error caused by the shaking of the base during the measurement process, and simultaneously, the protective cylinder cover not only can protect the equipment, but also can be used as a seat for the staff after being removed, and the practicality and humanized design of the device are improved.

[0016] 3、The heat dissipation assembly of the application is driven synchronously to rotate the rotating shaft and the fan blade during the rotation of the threaded rod through the linkage transmission structure of the threaded rod, forming an air flow that can cool the motor of the reinforcing assembly inside the base. The air flow can quickly take away the heat generated by the motor during operation, effectively balance the internal temperature of the base, avoid the performance degradation of components such as motor insulation performance degradation and operation efficiency reduction caused by high temperature, and provide temperature protection for the stable operation of the reinforcing assembly.

[0017] 4、The transverse observation plate of the application realizes stepless adjustment and quick locking through the sliding fit and magnetic attraction fixing mechanism. The length can be adjusted by pulling the pull rod, and after loosening, it is automatically adsorbed and positioned. With the help of hand-tightening bolts, vibration offset is avoided, no tools are needed, and one person can operate, which is flexible and adaptable to different span of conductor and ground wire measurement scenes, and improves the universality and convenience. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A base and a protective cylinder cover structure of a conductor and ground wire sag measurement system and method according to the application are shown in the schematic diagram. Figure 2 A connected structure cross-sectional structure schematic diagram of a base of a conductor and ground wire sag measurement system and method according to the application is shown in the schematic diagram. Figure 3 A conductor and ground wire sag measurement system and method according to the application is shown in the schematic diagram. Figure 2 An enlarged structure schematic diagram of A in the application is shown in the schematic diagram. Figure 4 A conductor and ground wire sag measurement system and method according to the application is shown in the schematic diagram. Figure 2 An enlarged structure schematic diagram of B in the application is shown in the schematic diagram. Figure 5 A conductor and ground wire sag measurement system and method according to the application is shown in the schematic diagram. Figure 2 An enlarged structure schematic diagram of C in the application is shown in the schematic diagram. Figure 6 A conductor and ground wire sag measurement system and method according to the application is shown in the schematic diagram. Figure 2 An enlarged structure schematic diagram of D in the application is shown in the schematic diagram.

[0019] Mark No. : 1, base; 2, support seat; 3, rolling bearing; 4, threaded rod; 5, driving assembly; 51, second motor; 52, first bevel gear; 53, second bevel gear; 6, vertical observation plate; 7, sliding assembly; 71, sliding block; 72, sliding groove; 8, transverse support rod; 9, transverse observation plate; 10, spring; 11, moving block; 12, pull rod; 13, neodymium iron boron permanent magnet block; 14, long iron sheet; 15, reinforcing assembly; 151, electric push rod; 152, lifting plate; 153, first motor; 154, drill rod; 16, heat dissipation assembly; 161, rotating shaft; 162, fan blade; 17, fixed plate; 18, hand screw bolt; 19, protective cylinder cover; 20, hand pull rod; 21, elastic rubber pad. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0021] As shown in Figures 1-6 , the present application provides a technical scheme: a conductor and ground wire sag measurement system, comprising a base 1, the top of the base 1 is movably connected with a protective cylinder cover 19, two hand pull rods 20 are symmetrically installed on the opposite sides of the protective cylinder cover 19, an elastic rubber pad 21 is fixedly installed on the top of the protective cylinder cover 19, the protective cylinder cover 19 is quickly disassembled through the movable connection structure, and when closed, it can form a sealed protection space to block the erosive medium such as dust and rainwater, prevent bumping the connected structure of the base 1, facilitate transportation, and after disassembly, the elastic rubber pad 21 on the top can provide buffering support and be used as a temporary seat, realizing the double satisfaction of protection function and ergonomics demand.

[0022] Further, the top of the base 1 is fixedly installed with a support seat 2, the support seat 2 is internally provided with a device groove in communication with the outside, the inner bottom wall of the device groove internally provided in the support seat 2 is provided with a bearing mounting hole, a rolling bearing 3 is embedded in the bearing mounting hole internally provided in the support seat 2, a threaded rod 4 is fixedly connected with the bearing inner ring of the rolling bearing 3, a driving assembly 5 is connected with the threaded rod 4, the driving assembly 5 comprises a second motor 51, the second motor 51 is fixedly connected with the inner wall of the device groove, a first bevel gear 52 is fixedly installed at the output end of the second motor 51, a second bevel gear 53 is meshingly connected with the first bevel gear 52, and the second bevel gear 53 is connected with the threaded rod 4. In use, the second motor 51 drives the first bevel gear 52 to rotate, the first bevel gear 52 can drive the second bevel gear 53 to rotate, and the second bevel gear 53 can drive the threaded rod 4 to rotate, so that the threaded rod 4 can rotate more stably.

[0023] Further, the outer surface of the threaded rod 4 is threadedly connected with a vertical observation plate 6, the opposite sides of the vertical observation plate 6 are both provided with a sliding assembly 7, the sliding assembly 7 comprises a sliding block 71, one side of the sliding block 71 is fixedly connected with the vertical observation plate 6, the inner side wall of the support base 2 is provided with a sliding groove 72 matched with the sliding block 71, and the sliding block 71 and the sliding groove 72 can guide the vertical observation plate 6 to move more stably. The vertical observation plate 6 is designed in a hollow manner, and one end of the threaded rod 4 away from the rolling bearing 3 is arranged inside the vertical observation plate 6.

[0024] Further, the outer surface of the vertical observation plate 6 is hingedly connected with a horizontal support rod 8, the inside of the horizontal support rod 8 is slidingly connected with a horizontal observation plate 9, the inside of the horizontal support rod 8 is fixedly connected with a spring 10, one end of the spring 10 is fixedly installed with a moving block 11, the inside of the moving block 11 is fixedly penetrated with a pull rod 12, one end of the pull rod 12 close to the horizontal observation plate 9 is fixedly installed with a neodymium iron boron permanent magnet block 13, and the upper surface of the horizontal observation plate 9 is fixedly installed with a long strip iron sheet 14 matched with the neodymium iron boron permanent magnet block 13. The top of the horizontal observation plate 9 is fixedly installed with a fixed plate 17, the fixed plate 17 and the vertical observation plate 6 are connected through a hand screw bolt 18, the hand screw bolt 18 facilitates the separation of the fixed plate 17 and the vertical observation plate 6 from each other, so that the vertical observation plate 6 can be placed in a rotating manner.

[0025] Further, the inside of the base 1 is provided with a reinforcing assembly 15 and a heat dissipation assembly 16 for dissipating heat of the reinforcing assembly 15, and the inside of the base 1 is installed with a heat dissipation net. The reinforcing assembly 15 comprises an electric push rod 151 fixedly installed on the inner top wall of the base 1, a lifting plate 152 fixedly installed on the vertically downward telescopic end of the electric push rod 151, a first motor 153 fixedly installed on the top of the lifting plate 152, a drill rod 154 fixedly installed on the output end of the first motor 153 penetrating the lifting plate 152, and a through slot provided on the bottom of the base 1 for the drill rod 154 to enter and exit. In use, the electric push rod 151 provides stable axial thrust, and cooperates with the rotating drilling action of the drill rod 154 driven by the first motor 153, so that the drill rod 154 can be deeply embedded into the ground soil to form a multi-point rigid anchoring structure, effectively resist the overturning moment caused by the wind load in the field environment and the uneven ground, and greatly improve the installation stability of the base 1. The heat dissipation assembly 16 comprises a rotating shaft 161, one end of the threaded rod 4 penetrates into the inside of the base 1 and is fixedly connected with the rotating shaft 161, a fan blade 162 is fixedly installed on the outer surface of the rotating shaft 161, the rotating power of the threaded rod 4 is used to synchronously drive the fan blade 162 to rotate, directional air flow circulation is formed, heat generated during the work of the reinforcing assembly 15 can be timely taken away, the working temperature of the first motor 153 and other key components is controlled within the rated range, and the reliability of long-term operation of the system is ensured.

[0026] The application also provides a method for measuring the sag of a conductor and ground wire, comprising the following steps: Step S1: Place the base 1 under the preset measurement position of the conductor and ground wire to be measured, operate the reinforcing assembly 15, start the electric push rod 151, make the telescopic end of the electric push rod 151 drive the lifting plate 152 to move vertically downward, and then drive the first motor 153 and the drill rod 154 to move downward, the drill rod 154 penetrates through the through slot at the bottom of the base 1 and contacts the ground, the first motor 153 is started, the first motor 153 drives the drill rod 154 to rotate, the drill rod 154 drills into the ground, and the fixing of the base 1 is completed; Step S2: Open the protective cylinder cover 19, hand-tighten the bolt 18 to fix the fixed plate 17 and the vertical observation plate 6, pull the pull rod 12, compress the spring 10 with the moving block 11, separate the neodymium-iron-boron permanent magnet block 13 from the long iron sheet 14, adjust the extension length of the horizontal observation plate 9 in the horizontal support rod 8 according to the measurement requirement, loosen the pull rod 12 after the adjustment is completed, and the moving block 11 drives the pull rod 12 and the neodymium-iron-boron permanent magnet block 13 to reset under the elastic force of the spring 10, the neodymium-iron-boron permanent magnet block 13 is adsorbed and fixed with the long iron sheet 14; Step S3: Start the second motor 51 in the driving assembly 5, the second motor 51 drives the first bevel gear 52 to rotate, the first bevel gear 52 is in meshing transmission with the second bevel gear 53, and then drives the threaded rod 4 to rotate in the rolling bearing 3, when the threaded rod 4 rotates, the vertical observation plate 6 slides in the sliding groove 72 on the inner side wall of the support seat 2 through the sliding block 71 of the sliding assembly 7, the height adjustment of the vertical observation plate 6 is realized, and until the horizontal observation plate 9 reaches the appropriate observation height; Step S4: During the rotation of the threaded rod 4, one end of the threaded rod 4 drives the rotating shaft 161 to rotate, the rotating shaft 161 drives the fan blade 162 to rotate, and the fan blade 162 rotates to generate air flow to cool the reinforcing assembly 15 in the base 1; Step S5: The sag of the conductor and ground wire is observed and data recorded through the horizontal observation plate 9 and the vertical observation plate 6, after the measurement is completed, the fixing of each component is removed in reverse order according to the above steps, and the protective cylinder cover 19 is covered on the base 1.

[0027] The above examples are only used to illustrate the technical solutions of the present application, but not limit it.

Claims

1. A conductor and ground line sag measurement system comprising a base (1), characterised in that: The top of the base (1) is fixedly provided with a supporting seat (2), an equipment slot communicating with the outside is formed in the supporting seat (2), a bearing mounting hole is formed in the inner bottom wall of the equipment slot in the supporting seat (2), a rolling bearing (3) is embedded in the bearing mounting hole in the supporting seat (2), a threaded rod (4) is fixedly connected to the bearing inner ring of the rolling bearing (3), a driving assembly (5) is connected to the threaded rod (4), a vertical observation plate (6) is threadedly connected to the outer surface of the threaded rod (4), and sliding assemblies (7) are arranged on the opposite sides of the vertical observation plate (6). A horizontal supporting rod (8) is hingedly connected to the outer surface of the vertical observation plate (6), a horizontal observation plate (9) is slidably connected to the inside of the horizontal supporting rod (8), a spring (10) is fixedly connected to the inside of the horizontal supporting rod (8), a moving block (11) is fixedly connected to one end of the spring (10), a pull rod (12) is fixedly arranged in the inside of the moving block (11), a neodymium-iron-boron permanent magnet block (13) is fixedly arranged at the end of the pull rod (12) close to the horizontal observation plate (9), and a long iron sheet (14) matched with the neodymium-iron-boron permanent magnet block (13) is fixedly arranged on the upper surface of the horizontal observation plate (9). The inside of the base (1) is provided with a reinforcing assembly (15) and a heat dissipation assembly (16) for dissipating heat of the reinforcing assembly (15).

2. A conductor / ground line sag measurement system as claimed in claim 1, characterized in that: The reinforcing assembly (15) comprises an electric push rod (151) fixedly arranged on the inner top wall of the base (1), a lifting plate (152) fixedly arranged at the vertically downward telescopic end of the electric push rod (151), a first motor (153) fixedly arranged on the top of the lifting plate (152), a drill rod (154) fixedly arranged at the output end of the first motor (153) penetrating through the lifting plate (152), and a penetrating groove formed in the bottom of the base (1) for the drill rod (154) to pass through.

3. A conductor / ground sag measurement system as set forth in claim 1, wherein: The heat dissipation assembly (16) comprises a rotating shaft (161), one end of the threaded rod (4) penetrates into the inside of the base (1) and is fixedly connected with the rotating shaft (161), and a fan blade (162) is fixedly arranged on the outer surface of the rotating shaft (161).

4. A conductor / ground sag measurement system as set forth in claim 1, wherein: The driving assembly (5) comprises a second motor (51) fixedly connected with the inner wall of the equipment slot, a first bevel gear (52) fixedly arranged at the output end of the second motor (51), a second bevel gear (53) meshingly connected with the first bevel gear (52), and the second bevel gear (53) connected with the threaded rod (4).

5. A conductor and ground line sag measurement system as claimed in claim 1, characterized in that: The sliding assembly (7) comprises a sliding block (71) fixedly connected with the vertical observation plate (6) on one side, and a sliding groove (72) matched with the sliding block (71) is formed in the inner side wall of the supporting seat (2).

6. A conductor / ground sag measurement system as set forth in claim 1, further comprising: The vertical observation plate (6) is designed in a hollow manner, and one end of the threaded rod (4) away from the rolling bearing (3) is arranged in the inside of the vertical observation plate (6).

7. A conductor / ground sag measurement system as set forth in claim 1, further comprising: The top of the transverse observation plate (9) is fixedly provided with a fixed plate (17), and the fixed plate (17) is connected with the vertical observation plate (6) through a hand screw bolt (18).

8. A conductor / ground sag measurement system as set forth in claim 1, further comprising: The top of the base (1) is movably connected with a protective cylinder cover (19), two hand levers (20) are symmetrically arranged on the two opposite sides of the protective cylinder cover (19), and the top of the protective cylinder cover (19) is fixedly provided with an elastic rubber pad (21).

9. A method for measuring the sag of a conductor or ground wire, comprising the system for measuring the sag of a conductor or ground wire according to any one of claims 1-8. Step S1: Place the base (1) at a preset measurement position below the conductor or ground wire to be measured, operate the reinforcing assembly (15), start the electric push rod (151), and make the telescopic end of the electric push rod (151) drive the lifting plate (152) to vertically move downwards, thereby driving the first motor (153) and the drill rod (154) to move downwards, the drill rod (154) penetrates through the through slot in the bottom of the base (1) and contacts the ground, the first motor (153) is started, and the first motor (153) drives the drill rod (154) to rotate, so that the drill rod (154) is drilled into the ground, and the fixing of the base (1) is completed. Step S2: Open the protective cylinder cover (19), fix the fixed plate (17) and the vertical observation plate (6) through the hand screw bolt (18), pull the pull rod (12), compress the spring (10), separate the neodymium-iron-boron permanent magnet block (13) from the long iron sheet (14), adjust the extension length of the transverse observation plate (9) in the transverse support rod (8) according to the measurement requirement, loosen the pull rod (12) after the adjustment is completed, and reset the pull rod (12) and the neodymium-iron-boron permanent magnet block (13) under the elastic force of the spring (10), and the neodymium-iron-boron permanent magnet block (13) is adsorbed and fixed with the long iron sheet (14). Step S3: Start the second motor (51) in the driving assembly (5), the second motor (51) drives the first bevel gear (52) to rotate, the first bevel gear (52) is meshed and driven with the second bevel gear (53), thereby driving the threaded rod (4) to rotate in the rolling bearing (3), when the threaded rod (4) rotates, the vertical observation plate (6) slides in the sliding groove (72) in the inner side wall of the support seat (2) through the sliding block (71) of the sliding assembly (7), the height of the vertical observation plate (6) is adjusted, and until the transverse observation plate (9) reaches a suitable observation height. Step S4: In the rotating process of the threaded rod (4), one end of the threaded rod (4) drives the rotating shaft (161) to rotate, the rotating shaft (161) drives the fan blade (162) to rotate, and the fan blade (162) rotates to generate air flow to cool the reinforcing assembly (15) in the base (1). Step S5: The sag of the conductor or ground wire is observed and data recorded through the transverse observation plate (9) and the vertical observation plate (6), after the measurement is completed, the fixing of each component is sequentially removed in the reverse order of the above steps, and the protective cylinder cover (19) is covered on the base (1).

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