Live installation and removal equipment and method for overhead line phase sequence signs

Abstract

The present invention relates to the technical field of line identification board installation, and in particular to a live installation and removal device and method for overhead line phase sequence boards, comprising a protective cover and a connecting block, etc.; the protective cover is made of a transparent anti-corrosion material; and a connecting block is provided on both the left and right sides of the protective cover. The present invention realizes convenient hanging of the phase sequence boards by wrapping a steel belt around a steel frame and then inserting one side of the steel belt into a plug-in slot to fasten it to the steel frame, without the need to calibrate the screw holes on the phase sequence boards with the threaded holes on the steel frame base in the existing manner; all the phase sequence boards on the phase sequence boards are temporarily hung on the workers through the cooperation of a hook and a clamping part, thereby increasing the convenience of the workers in carrying the phase sequence boards; the phase sequence boards hooked thereon are hung on the steel frame under the action of gravity by the hook, and the workers do not need to hold the protective cover with their hands before fastening the steel belt, so that both hands of the workers can be used for fastening the steel belt, further improving the convenience in the installation process.

Description

Technical Field

[0001] The present invention relates to the technical field of line identification plate installation, and in particular to a device and method for live installation and removal of overhead line phase sequence plates. Background Art

[0002] The phase sequence plate is hung on the cable steel frame for ground workers to quickly determine the phase sequence of each cable. When hanging the phase sequence plate, workers need to carry the phase sequence plate to the high steel frame and then hang it on the steel frame by bolts or other fixing methods. The existing method of using bolts requires aligning the holes of the phase sequence plate with the screw holes on the steel frame before fixing it. This method is not conducive to the rapid installation of the phase sequence plate. In addition, in windy conditions, since the phase sequence plate is hung at a high position from the ground, the wind at a high position is greater than that on the ground, which makes the phase sequence plate prone to shaking during installation, making calibration more difficult and more detrimental to the rapid installation of the phase sequence plate. At the same time, since there are more cables on the steel frame, the number of phase sequence plates carried also increases, which leads to safety hazards when workers carry too many phase sequence plates when climbing.

[0003] At the same time, in a high-altitude and windy environment, workers may drop the phase sequence plate while fixing it, and the dropped phase sequence plate may easily injure pedestrians on the road. At the same time, when the phase sequence plate is left outdoors for a long time and it rains, the rainwater may easily erode the bolt parts used for locking and fixing, resulting in the rusted bolts being difficult to remove when workers need to remove the phase sequence plate for replacement, making it difficult for workers to remove the phase sequence plate. Summary of the Invention

[0004] In order to overcome the disadvantage of the existing phase sequence plate installation method that the holes of the phase sequence plate need to be aligned with the screw holes on the steel frame for fixing, which is not conducive to the rapid installation of the phase sequence plate, the present invention provides an overhead line phase sequence plate live installation and removal device and method.

[0005] Technical solution: A device for live installation and removal of phase sequence plates on overhead lines, comprising a protective cover and a connecting block; the protective cover is made of transparent, corrosion-resistant material; a connecting block is provided on both the left and right sides of the protective cover; a phase sequence plate is placed inside the protective cover; the device also comprises a steel belt, a card plate, a locking block, a locking assembly and a carrying assembly; a card plate is detachably connected to the protective cover; a number of locking blocks are provided on the card plate; a steel belt for convenient installation and removal of the phase sequence plate is rotatably connected to each connecting block; a locking assembly is connected to the connecting block; a plug interface is provided on each steel belt; the plug interface of each steel belt can be snapped onto the corresponding locking block; a carrying assembly is placed in front of the protective cover to facilitate workers to carry the phase sequence plate.

[0006] As a preferred technical solution of the present invention, the locking assembly includes a bolt and a shield; a bolt is screwed onto the rear side of each connecting block; each connecting block is provided with a storage cavity; each bolt slides in an adjacent storage cavity, and the length of the storage cavity is greater than the length of the bolt; a plug-in slot is provided on the upper side of each connecting block, and each plug-in slot is connected to the adjacent storage cavity; each steel belt is slidably connected to a shield to prevent rainwater from penetrating into the plug-in slot.

[0007] As a preferred technical solution of the present invention, the carrying assembly includes a fixed block and a hook; the fixed block is fixed with a plurality of hooks for workers to carry the phase sequence card; each hook is connected to a clamping portion.

[0008] As a preferred technical solution of the present invention, it also includes a baffle and a handle; the fixed block is fixed with a baffle for limiting the movement of the steel belt; and the baffle is fixed with a plurality of handles.

[0009] As a preferred technical solution of the present invention, a sealing sheet is also included; a sealing sheet is fixedly connected to the rear side of each connecting block through a flexible strip to prevent the bolts from rusting.

[0010] As a preferred technical solution of the present invention, the front end of each bolt is larger than the rear side of the receiving cavity.

[0011] As a preferred technical solution of the present invention, each shield is made of elastic rubber material.

[0012] As a preferred technical solution of the present invention, it also includes a limit block; each connecting block is fixedly connected to a plurality of limit blocks; and there is a distance between the protective cover and the phase sequence plate.

[0013] As a preferred technical solution of the present invention, the protective cover is provided with a plurality of rotating parts for preventing the connection between the steel belt and the steel frame from loosening.

[0014] A method for live installation and removal of overhead line phase sequence sign equipment comprises the following steps:

[0015] S1: Assemble, install the phase sequence plates into the protective cover respectively, and then insert the card plate into the protective cover to fix the phase sequence plates;

[0016] S2: Carrying: After passing the undisassembled steel belt through the hook, use the fixed block and baffle to limit the steel belt, then buckle the hook on the worker and carry it to the phase sequence sign hanging area;

[0017] S3: Installation, first hook the hook on the steel frame, then the worker pulls the steel belt from the hook to the steel frame position, unscrews the locking block to loosen the steel belt, the worker turns the steel belt toward the steel frame and around the steel frame, and finally inserts the steel belt into the socket, screws the bolt through the socket, locks the steel belt, and fastens the protective cover and phase sequence plate to the steel frame.

[0018] The beneficial effects of the present invention are as follows: the present invention realizes that after the steel belt is passed through the steel frame, one side of the steel belt is inserted into the plug-in slot to fasten it to the steel frame, eliminating the need to align the screw holes on the phase sequence plate with the threaded holes on the steel frame base in the existing manner, thereby realizing convenient hanging of the phase sequence plate;

[0019] All phase sequence plates on it can be temporarily hung on the worker through the cooperation of hook and clamping part, which increases the convenience of the worker to carry;

[0020] The phase sequence plate hung on the hook is suspended on the steel frame under the action of gravity. Workers do not need to hold the protective cover with their hands before tightening the steel belt. Workers can use both hands to tighten the steel belt, further improving the convenience of the installation process.

[0021] The hook supports the unreleased steel belt, so that even if the phase sequence sign slips out of your hand, it will not fall and injure pedestrians on the road, thus improving the safety of hanging the phase sequence sign.

[0022] The plug slot is covered by a shield to prevent rainwater from entering the slot, thereby preventing the bolts from being corroded and making it easier for subsequent workers to remove and replace the phase sequence plate;

[0023] The swing angle of the protective cover is limited by the limit block, so that the front and rear swing angles of the protective cover cannot exceed 90 degrees, thereby preventing the protective cover from hitting the steel frame and being damaged;

[0024] The protective cover hits the limit block and shakes it, shaking off the dust on its surface to prevent the dust from affecting the road workers' observation of the cable phase sequence. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the live installation and removal equipment and method of overhead line phase sequence signs of the present invention;

[0026] Figure 2 is a cross-sectional view of the protective cover of the present invention;

[0027] Figure 3 It is a schematic diagram of the three-dimensional structure of the carrying assembly of the present invention;

[0028] Figure 4 This is a diagram showing the hanging state of the carrying assembly of the present invention;

[0029] Figure 5 is a cross-sectional view of the connecting block of the present invention;

[0030] Figure 6 Schematic diagram of the three-dimensional structure of the sealing sheet of the present invention;

[0031] Figure 7 It is a schematic diagram of the three-dimensional structure of the limit block of the present invention.

[0032] The markings in the figure are: 1-protective cover, 1001-rotating part, 2-connecting block, 2001-storage cavity, 2002-plug-in slot, 3-phase sequence plate, 4-steel belt, 4001-plug-in interface, 101-fixed block, 102-card plate, 103-locking block, 104-sealing piece, 105-baffle, 106-hook, 10601-clamping part, 107-handle, 108-bolt, 109-blocking cover, 201-limiting block. DETAILED DESCRIPTION

[0033] The present invention will be further described below with reference to the accompanying drawings and examples.

[0034] Example 1

[0035] like Figures 1-6 As shown, a live installation and removal device for overhead line phase sequence plates includes a protective cover 1 and a connecting block 2; the protective cover 1 is made of a transparent anti-corrosion material; a connecting block 2 is provided on the left and right sides of the protective cover 1; a phase sequence plate 3 is placed inside the protective cover 1;

[0036] It also includes a steel belt 4, a card plate 102, a locking block 103, a locking assembly and a carrying assembly; the protective cover 1 is detachably connected to the card plate 102; two locking blocks 103 are provided on the card plate 102; each connecting block 2 is rotatably connected to a steel belt 4; the connecting block 2 is connected to the locking assembly; each steel belt 4 is provided with a plug interface 4001; the plug interface 4001 of each steel belt 4 can be clipped onto the corresponding locking block 103; a carrying assembly is placed in front of the protective cover 1.

[0037] The locking assembly includes a bolt 108 and a shield 109; a bolt 108 is screwed onto the rear side of each connecting block 2; each connecting block 2 is provided with a receiving cavity 2001; each bolt 108 slides in an adjacent receiving cavity 2001, and the length of the receiving cavity 2001 is greater than the length of the bolt 108; a plug-in slot 2002 is provided on the upper side of each connecting block 2, and each plug-in slot 2002 is connected to the adjacent receiving cavity 2001; a shield 109 is slidably connected to each steel belt 4.

[0038] The carrying assembly includes a fixing block 101 and a hook 106 ; two hooks 106 are fixedly connected to the fixing block 101 ; and each hook 106 is connected to a clamping portion 10601 .

[0039] It also includes a baffle 105 and a handle 107 ; the baffle 105 is fixedly connected to the fixing block 101 ; and two handles 107 are fixedly connected to the baffle 105 .

[0040] A sealing sheet 104 is also included; a sealing sheet 104 is fixedly connected to the rear side of each connection block 2 via a flexible strip.

[0041] The front end of each bolt 108 is larger than the rear side of the receiving cavity 2001, so as to prevent the bolt 108 from falling during the installation process and injuring pedestrians on the ground.

[0042] Each shield 109 is made of elastic rubber material to improve the sealing between the shield 109 and the connecting block 2 and prevent rainwater from penetrating into the plug-in slot 2002.

[0043] Before the workers carry the phase sequence sign 3 to the cable steel frame for hanging, they first put the phase sequence sign 3 into the corresponding protective cover 1, and then fix the phase sequence sign 3 on the protective cover 1 by screws. The protective cover 1 is used to reduce the erosion and fading of the phase sequence sign 3 during use, thereby reducing subsequent maintenance costs. The workers then carry the protective cover 1 with the phase sequence sign 3 to the cable steel frame for hanging. During this process, in order to facilitate the workers to hang the phase sequence sign 3 on the cable steel frame, the locking block 103 on the clamping plate 102 is unscrewed to release the fixing of the locking block 103 to the steel belt 4, and then the steel belt 4 is rotated with the connection point between the steel belt 4 and the protective cover 1 as the rotation axis. After the rotation, the steel belt 4 unfolds as shown Figure 3 In the state shown, the worker only needs to pass the steel belt 4 around the steel frame and then insert the other side of the steel belt 4 into the plug-in slot 2002. Then, by tightening the bolt 108 on the connecting block 2, the bolt 108 passes through the plug-in interface 4001 and enters the storage cavity 2001, thereby fastening the steel belt 4 to the steel frame. By tightening and adjusting the position of the bolt 108 on the plug-in interface 4001, the steel belt 4 can adapt to steel frames of different sizes. There is no need to calibrate the screw holes on the phase sequence plate 3 and the threaded holes on the steel frame base, so that the phase sequence plate 3 can be conveniently hung. It should be noted that: at this time, the cable is in the current transmission state, so by wearing insulating At the same time, after the protective device is installed, since the front end of the bolt 108 is larger than the rear side of the storage cavity 2001, the bolt 108 cannot be completely withdrawn from the storage cavity 2001, and the bolt 108 on the connecting block 2 cannot be removed from the connecting block 2. There is no need for workers to carry the bolt 108, avoiding the influence of the environment when working at height. That is, the worker needs to hold the steel frame with one hand to ensure safety, and use the other hand to perform installation work, and the bolt 108 is likely to slip out of the hand and injure pedestrians on the road. That is, the above method also avoids the phenomenon of the bolt 108 slipping out of the hand during the tightening process, thereby improving the safety of the phase sequence plate 3 during the installation process.

[0044] It is also taken into consideration that workers may have difficulty in taking and putting away phase sequence signs 3 when carrying multiple protective covers 1 and when installing them. Therefore, after putting the phase sequence signs 3 into the protective cover 1, the workers pass the unfolded steel belts 4 through the hooks 106 in turn, so that the phase sequence signs 3 are hung on the hooks 106 under the action of the steel belts 4, and the steel belts 4 are blocked by the fixed blocks 101 to prevent them from falling off directly from the hooks 106. In the process of workers carrying the protective cover 1 and the phase sequence signs 3 to the steel frame, the hooks 106 can be used to temporarily hook all the phase sequence signs 3 on them to the workers, thereby increasing the convenience of the workers in carrying them. At the same time, the workers can also pull out the clamping part 10601 and plug it into the hook 106 to form a closed loop, thereby improving the stability of the hook 106 hanging on the workers.

[0045] When workers carry the protective cover 1 and climb toward the steel frame, the protective cover 1 is prone to shaking, causing the steel belts 4 to deviate and overlap with each other without restriction, resulting in the subsequent workers having to straighten the overlapped steel belts 4 one by one before they can remove the single protective cover 1. At the same time, the deviated steel belt 4 is also prone to get stuck on the fixed block 101, causing the steel belt 4 to be tightened and difficult to pull off. In order to facilitate subsequent workers to pull the steel belt 4 off from the hook 106, a baffle 105 is provided on the fixed block 101, and the baffle 105 and the hook 106 can only accommodate the thickness of one steel belt 4. The baffle 105 is used to restrict the steel belt 4 between the baffle 105 and the hook 106, avoiding the overlap of two adjacent steel belts 4, and at the same time preventing the steel belt 4 from getting stuck on the fixed block 101, making it convenient for subsequent workers to remove the protective cover 1 and fix the phase sequence plate 3.

[0046] It is also considered that when the worker is winding the steel belt 4 around the steel frame, the strong wind in the high altitude environment will continuously blow towards the phase sequence plate 3 and the protective cover 1, which may cause the protective cover 1 and the phase sequence plate 3 to fall off easily when they are not completely fastened to the steel frame. At this time, the worker will hold the handle 107 to remove the hook 106 and then hook it on the steel frame. Figure 3 As shown, the worker can then release the handle 107, so that the hook 106 and the phase sequence plate 3 hung thereon are in the form of Figure 4 As shown, when the hook 106 is hung on the steel frame, the clamping portion 10601 is pulled out and inserted and clamped on the hook 106, as shown in FIG. Figure 4As shown, the hook 106 and the clamping part 10601 cooperate to form a closed loop buckle to be hung on the steel frame, so that when encountering a strong wind environment, even if the hook 106 shakes, it will not fall directly. At this time, the worker does not need to hold the protective cover 1 with his hands before tightening the steel belt 4, so that the worker can use both hands to tighten the steel belt 4, thereby improving the convenience during the installation process. At the same time, the worker first unlocks and releases the steel belt 4 on one side from the locking block 103, and then tightens the steel belt 4 on the steel frame. In this process, even if the phase sequence sign 3 falls out of hand, the steel belt 4 on the other side is hooked on the hook 106 in an unlocked state, so that the phase sequence sign 3 that falls out of hand is supported by the hook 106 hooked on the steel frame, thereby avoiding the phenomenon of falling out during the hanging process of the phase sequence sign 3, and improving the safety when hanging the phase sequence sign 3.

[0047] It is also taken into consideration that when the phase sequence plate 3 is facing an outdoor rainy scene, rainwater is easy to flow into the plug-in slot 2002 and then into the storage cavity 2001, and then directly contact the bolt 108. The bolt 108 used to lock the steel belt 4 is easy to corrode and rust when eroded by rainwater, which causes subsequent workers to need to replace and disassemble the phase sequence plate 3. The rusted bolt 108 is difficult to remove, which makes it difficult for workers to disassemble the phase sequence plate 3. In order to avoid this phenomenon, when the steel belt 4 is inserted into the plug-in slot 2002, the worker pushes the shield 109 to fit the upper side of the connecting block 2, so that the shield 109 seals the plug-in slot 2002, so that when rainwater contacts the connecting block 2, the rainwater cannot pass through the shield 109. 9 enters the plug-in slot 2002, thereby preventing rainwater from entering the storage chamber 2001, thereby preventing the bolt 108 from being corroded, making it easier for subsequent workers to remove and replace the phase sequence plate 3. At the same time, the head of the bolt 108 is also corroded and rusted, making it impossible for workers to screw the bolt 108 through the head of the bolt 108. By taking advantage of the fact that the length of the storage chamber 2001 is greater than the length of the bolt 108, the bolt 108 is tightened and embedded in the storage chamber 2001. At this time, the worker covers the storage chamber 2001 with the sealing sheet 104, thereby completely sealing the storage chamber 2001, preventing rainwater from corroding every part of the bolt 108, and facilitating the subsequent disassembly work of the workers.

[0048] Example 2

[0049] On the basis of Example 1, Figure 5 and Figure 7 As shown, the protective cover (1) and the connecting block 2 are rotatably connected via a rotating portion (1001).

[0050] It also includes a limit block 201; two limit blocks 201 are fixedly connected to each connecting block 2, the limit blocks 201 are made of rubber, and the limit blocks 201 are located on the rotation path of the protective cover 1. The limit blocks 201 made of rubber can buffer and absorb energy of the rotating protective cover 1 to avoid excessive impact force between the protective cover 1 and the limit blocks 201; there is a distance between the protective cover 1 and the phase sequence plate 3.

[0051] When the phase sequence plate 3 is placed outdoors for a long time, considering that the impact of the wind on the protective cover 1 in a strong wind environment will directly act on the steel belt 4, causing the steel belt 4 and the steel frame to be loose, the protective cover 1 and the connecting block 2 are rotatably connected through the rotating part 1001, so that the protective cover 1 can be rotated on the connecting block 2 when it is blown by the wind, thereby reducing the force acting on the steel belt 4 and the steel frame by the rotation. At the same time, when the protective cover 1 is used outdoors for a long time, a large amount of dust will easily adhere to the surface of the protective cover 1, making the protective cover 1 blurred. Workers on the road cannot observe the phase sequence plates 3 of different colors through the protective cover 1, and thus it is difficult to judge the phase sequence of the cable. In order to avoid this phenomenon, in a strong wind environment, since the protective cover 1 There is a gap between the protective cover 1 and the phase sequence plate 3, so that the protective cover 1 and the phase sequence plate 3 can move relative to each other in a strong wind environment, and then the phase sequence plate 3 can be used to shake the protective cover 1, so that the dust on the protective cover 1 is shaken off, and the shaken-off dust is blown away in cooperation with the airflow to achieve a self-cleaning effect. Furthermore, in order to prevent the protective cover 1 from rotating too much and hitting the steel frame, the rotation angle of the protective cover 1 is limited by the limit block 201, so that the protective cover 1 can never hit the steel frame, thereby protecting the protective cover 1. At the same time, when the protective cover 1 hits the limit block 201, the protective cover 1 is shaken again, and the dust on the protective cover 1 falls off again by shaking, further improving the dust cleaning effect, thereby making it easier for ground workers to observe the phase sequence of the cable.

[0052] A method for live installation and removal of overhead line phase sequence sign equipment comprises the following steps:

[0053] S1: Assembling, respectively install the phase sequence plates 3 into the protective cover 1, and then insert the clamping plate 102 into the protective cover 1 to fix the phase sequence plates 3;

[0054] S2: Carrying: After passing the undisassembled steel belt 4 through the hook 106, the steel belt 4 is restrained by the fixing block 101 and the baffle 105. Then, the hook 106 is buckled on the worker and carried to the hanging area of ​​the phase sequence sign 3;

[0055] S3: Installation, first hook the hook 106 on the steel frame, then the worker pulls the steel belt 4 from the hook 106 to the steel frame position, unscrews the locking block 103 to loosen the steel belt 4, and the worker rotates the steel belt 4 toward the steel frame and around the steel frame. Finally, the worker inserts the steel belt 4 into the plug-in slot 2002, tightens the bolt 108 through the plug-in interface 4001, locks the steel belt 4, and fastens the protective cover 1 and the phase sequence plate 3 to the steel frame.

[0056] Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art from this disclosure that various changes or modifications may be made to the present invention without departing from the principles and spirit of the invention as defined in the claims. Therefore, the detailed description of the disclosed embodiments is intended to be illustrative only and not to limit the present invention, which is to be defined by the claims.

Claims

1. An overhead line phase sequence plate live installation and removal device, comprising a protective cover (1) and a connecting block (2); the protective cover (1) is made of a transparent anti-corrosion material; a connecting block (2) is provided on both the left and right sides of the protective cover (1); a phase sequence plate (3) is placed inside the protective cover (1); and the device is characterized in that: The invention also includes a steel belt (4), a card plate (102), a locking block (103), a locking assembly and a carrying assembly; the protective cover (1) is detachably connected to the card plate (102); a plurality of locking blocks (103) are provided on the card plate (102); each connecting block (2) is rotatably connected to a steel belt (4) for conveniently installing and removing the phase sequence plate (3); the locking assembly is connected to the connecting block (2); each steel belt (4) is provided with a plug interface (4001); the plug interface (4001) of each steel belt (4) can be plugged into the corresponding locking block (103); a carrying assembly is placed in front of the protective cover (1) for facilitating workers to carry the phase sequence plate (3); The locking assembly includes a bolt (108) and a shield (109); a bolt (108) is screwed onto the rear side of each connecting block (2); a receiving cavity (2001) is provided on each connecting block (2); each bolt (108) slides in an adjacent receiving cavity (2001), and the length of the receiving cavity (2001) is greater than the length of the bolt (108); a plug-in slot (2002) is provided on the upper side of each connecting block (2), and each plug-in slot (2002) is communicated with an adjacent receiving cavity (2001); and a shield (109) is slidably connected to each steel belt (4) to prevent rainwater from penetrating into the plug-in slot (2002).

2. The live installation and removal equipment for overhead line phase sequence signs according to claim 1 is characterized in that: The carrying assembly comprises a fixed block (101) and a hook (106); a plurality of hooks (106) are fixedly connected to the fixed block (101) for workers to carry the phase sequence plate (3); and each hook (106) is connected to a clamping portion (10601).

3. The live installation and removal equipment for overhead line phase sequence signs according to claim 2 is characterized in that: It also includes a baffle (105) and a handle (107); the baffle (105) for limiting the movement of the steel belt (4) is fixedly connected to the fixed block (101); and a plurality of handles (107) are fixedly connected to the baffle (105).

4. The live installation and removal equipment for overhead line phase sequence signs according to claim 3 is characterized in that: It also includes a sealing sheet (104); the rear side of each connecting block (2) is fixed with a sealing sheet (104) via a flexible strip to prevent the bolts (108) from rusting.

5. The live installation and removal equipment for overhead line phase sequence signs according to claim 4 is characterized in that: The front end of each bolt (108) is larger than the rear side of the receiving cavity (2001).

6. The live installation and removal equipment for overhead line phase sequence signs according to claim 1 is characterized in that: Each baffle (109) is made of elastic rubber.

7. The device for installing and removing live phase sequence signs of overhead lines according to claim 5 is characterized in that: The protective cover (1) and the connecting block (2) are rotatably connected via a rotating portion (1001).

8. The device for installing and removing live phase sequence signs of overhead lines according to claim 7 is characterized in that: It also includes a limiting block (201); each connecting block (2) is fixedly connected to a plurality of limiting blocks (201), the limiting blocks (201) are made of rubber material, and the limiting blocks (201) are located on the rotation path of the protective cover (1); there is a distance between the protective cover (1) and the phase sequence plate (3).

9. A method for installing and removing a live phase sequence plate on an overhead line, characterized by: The method uses the live installation and removal device for overhead line phase sequence signs according to claim 8, and comprises the following steps: S1: Assembling, respectively inserting the phase sequence plate (3) into the protective cover (1), and then inserting the clamping plate (102) into the protective cover (1) to fix the phase sequence plate (3); S2: Carrying, after passing the undisassembled steel belt (4) through the hook (106), the steel belt (4) is restricted by the fixing block (101) and the baffle (105), and then the hook (106) is buckled on the worker and carried to the phase sequence plate (3) installation area; S3: Installation, first hook the hook (106) on the steel frame, then the worker pulls the steel belt (4) from the hook (106) to the steel frame position, unscrews the locking block (103) to loosen the steel belt (4), and rotates the steel belt (4) toward the steel frame and around the steel frame. Finally, the worker inserts the steel belt (4) into the plug slot (2002), screws the bolt (108) through the plug interface (4001), locks the steel belt (4), and fastens the protective cover (1) and the phase sequence plate (3) to the steel frame.

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