Overhead line phase sequence board live-line mounting and dismounting equipment and method

Abstract

The invention relates to the technical field of line signboard installation, in particular to an overhead line phase sequence board live-line installation and removal device and method. The protective cover is made of a transparent anti-corrosion material; the left side and the right side of the protective cover are each provided with a connecting block. According to the invention, after the steel strip bypasses the steel frame, one side of the steel strip is inserted into the insertion groove to be tightened on the steel frame, and a screw hole in the phase sequence board and a threaded hole in a steel frame base do not need to be calibrated in an existing mode, so that the phase sequence board is conveniently hung; all the phase sequence boards on the hanging rack are temporarily hung and buckled on the body of a worker through the cooperation of the hook and the clamping part, so that the carrying convenience of the worker is improved; the hook and the phase sequence board hooked on the hook are hung on the steel frame under the action of gravity, so that a worker does not need to hold the protective cover by hands and then tighten the steel belt, both hands of the worker can be used for tightening the steel belt, and the convenience in the mounting process is further improved.

Description

Technical Field

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

[0002] The phase sequence plate is hung on the cable steel frame to enable 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 altitude from the ground, the wind at a high altitude is greater than that on the ground, which makes the phase sequence plate easy to shake during the installation process, 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 to climb.

[0003] At the same time, in a high-altitude and windy environment, workers may drop the phase sequence plates while fixing them, and the dropped phase sequence plates may easily injure pedestrians on the road. At the same time, when the phase sequence plates are 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 subsequent workers need to dismantle the phase sequence plates for replacement, making it difficult for workers to dismantle the phase sequence plates. Summary of the invention

[0004] In order to overcome the disadvantage that the existing phase sequence plate installation method requires the holes of the phase sequence plate 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 live installation and removal device for phase sequence plates of overhead lines, comprising a protective cover and a connecting block; the protective cover is made of transparent anti-corrosion material; a connecting block is arranged on the left and right sides of the protective cover; a phase sequence plate is placed inside the protective cover; it also comprises a steel belt, a card plate, a locking block, a locking assembly and a carrying assembly; the protective cover is detachably connected to a card plate; a number of locking blocks are arranged on the card plate; each connecting block is rotatably connected to a steel belt for convenient installation and removal of the phase sequence plate; the connecting block is connected to a locking assembly; each steel belt is provided with a plug interface; the other end of each steel belt can be clamped on the corresponding locking block; a carrying assembly is placed in front of the protective cover for 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 on 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 groove is provided on the upper side of each connecting block, and each plug-in groove is connected to the adjacent storage cavity; a shield is slidably connected to each steel belt to prevent rainwater from penetrating into the plug-in groove.

[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 with 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 fixedly connected to a baffle for limiting the movement of the steel belt; and the baffle is fixedly connected to 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 baffle is made of elastic rubber material.

[0012] As a preferred technical solution of the present invention, it also includes a limit block; each connection 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 installing and removing an overhead line phase sequence plate live equipment comprises the following steps: S1: Assemble, install the phase sequence plates into the protective cover respectively, and then plug the card into the protective cover to fix the phase sequence plates; 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; 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 plug-in slot, screws the bolt through the plug-in interface, locks the steel belt, and fastens the protective cover and phase sequence plate to the steel frame.

[0015] Beneficial effects of the present invention: The present invention realizes convenient hanging of the phase sequence plate by passing the steel belt around the steel frame and inserting one side of the steel belt into the plug-in slot to fasten it to the steel frame without calibrating the screw holes on the phase sequence plate and the threaded holes on the steel frame base in the existing way; All phase sequence plates on the device are temporarily hung on the worker through the cooperation of the hook and the clamping part, which increases the convenience of the worker to carry; The phase sequence plate hung on the hook is hung 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, so that workers can use both hands to tighten the steel belt, further improving the convenience of the installation process; The hook holds 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; The plug slot is covered by a shield to prevent rainwater from entering the plug slot, thereby preventing the bolts from being corroded, making it easier for subsequent workers to remove and replace the phase sequence plate; 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; The protective cover hits the limit block and causes it to vibrate, 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

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the live installation and removal equipment and method of overhead line phase sequence plate of the present invention; Figure 2 is a cross-sectional view of the protective cover of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the carrying assembly of the present invention; Figure 4 It is a diagram showing the hanging state of the carrying assembly of the present invention; Figure 5 is a cross-sectional view of a connection block of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the sealing sheet of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the limiting block of the present invention.

[0017] 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 sheet, 105-baffle, 106-hook, 10601-clamping part, 107-handle, 108-bolt, 109-baffle cover, 201-limiting block. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0019] Example 1

[0020] like Figure 1-Figure 6 As shown, an overhead line phase sequence plate live installation and removal device 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 arranged on the left and right sides of the protective cover 1; a phase sequence plate 3 is placed in the protective cover 1; It also includes a steel belt 4, a clamping plate 102, a locking block 103, a locking assembly and a carrying assembly; the clamping plate 102 is detachably connected to the protective cover 1; two locking blocks 103 are arranged on the clamping plate 102; each connecting block 2 is rotatably connected to a steel belt 4; the connecting block 2 is connected to a locking assembly; each steel belt 4 is provided with a plug interface 4001; the other end of each steel belt 4 can be clamped on the corresponding locking block 103; a carrying assembly is placed in front of the protective cover 1.

[0021] The locking assembly includes a bolt 108 and a shield 109; a bolt 108 is screwed on the rear side of each connecting block 2; a storage cavity 2001 is provided on each connecting block 2; each bolt 108 slides in an adjacent storage cavity 2001, and the length of the storage 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 storage cavity 2001; a shield 109 is slidably connected to each steel belt 4.

[0022] 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 .

[0023] 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 .

[0024] 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.

[0025] The front end of each bolt 108 is larger than the rear side of the storage cavity 2001, so as to prevent the bolt 108 from falling during the installation process and injuring pedestrians on the ground.

[0026] 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 .

[0027] Before 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 by fixing the clamping plate 102 on the protective cover 1 with screws. The protective cover 1 is used to reduce the phenomenon of erosion and fading of the phase sequence sign 3 during use, thereby reducing subsequent maintenance costs. Then, the workers 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, and then tighten the bolt 108 on the connecting block 2 to make the bolt 108 pass through the plug-in port 4001 and enter the storage cavity 2001, so that the steel belt 4 is fastened to the steel frame, and the position of the bolt 108 on the plug-in port 4001 is adjusted by tensioning, so that the steel belt 4 can adapt to steel frames of different sizes, and 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 as to realize the convenient hanging of the phase sequence plate 3. It should be noted that: at this time, the cable is in the current transmission state, so by wearing insulating At the same time, 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, which avoids being affected by the environment during high-altitude operations. That is, workers need to hold the steel frame with one hand to ensure safety and use the other hand to perform installation operations, and the bolt 108 may 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.

[0028] 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 phase sequence signs 3 into protective covers 1, workers pass the unfolded steel belts 4 through hooks 106 one by one, so that phase sequence signs 3 are hung on hooks 106 under the action of steel belts 4, and the steel belts 4 are blocked by fixed blocks 101 to prevent them from falling off directly from hooks 106. When workers carry protective covers 1 and phase sequence signs 3 to the steel frame, they can use hooks 106 to temporarily buckle all phase sequence signs 3 on them to the workers, thereby increasing the convenience for workers to carry. At the same time, 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 buckled on the workers.

[0029] 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 need for subsequent workers to straighten the overlapped steel belts 4 one by one before they can take out a single protective cover 1. At the same time, the deviated steel belt 4 is also easy 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 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 overlapping of two adjacent steel belts 4, and at the same time preventing the steel belt 4 from getting stuck on the fixed block 101, so that subsequent workers can remove the protective cover 1 and fix the phase sequence plate 3.

[0030] It is also considered that when the worker winds the steel belt 4 around the steel frame, the strong wind in the high altitude 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 when they are not completely fastened to the steel frame. At this time, the worker holds the handle 107 to remove the hook 106 and then hooks 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 in the figure, 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 the figure. Figure 4 As shown, the hook 106 and the clamping part 10601 cooperate to form a closed loop buckle to hang 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 support 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 the 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 the hand is supported by the hook 106 hooked on the steel frame, thereby avoiding the phenomenon of falling out during the process of hanging the phase sequence sign 3, and improving the safety of hanging the phase sequence sign 3.

[0031] It is also considered that when the phase sequence plate 3 faces an outdoor rainy scene, rainwater is easy to flow into the plug-in slot 2002 and then enter the storage chamber 2001, and then directly contact the bolt 108, and 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 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 on 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 10 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. The length of the storage chamber 2001 is greater than the length of the bolt 108, so that the bolt 108 is tightened and embedded in the storage chamber 2001. At this time, the worker covers the sealing sheet 104 on the storage chamber 2001, 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.

[0032] Example 2

[0033] 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).

[0034] It also includes a limit block 201; two limit blocks 201 are fixedly connected to each connection 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.

[0035] 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 between the steel belt 4 and the steel frame by 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, thereby 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 it is difficult to judge the phase sequence of the cable. In order to avoid this phenomenon, in a strong wind environment, due to the protective cover 1 There is a gap between 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 windy 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 coordination with the airflow to achieve a self-cleaning effect. Furthermore, in order to prevent the protective cover 1 from hitting the steel frame due to excessive rotation angle, 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 facilitating ground workers to observe the phase sequence of the cable.

[0036] A method for installing and removing an overhead line phase sequence plate live equipment comprises the following steps: S1: Assembling, respectively inserting the phase sequence plates 3 into the protective cover 1, and then plugging the clamping plate 102 into the protective cover 1 to fix the phase sequence plates 3; S2: Carrying, after the undisassembled steel belt 4 passes 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 hanging area of ​​the phase sequence sign 3; 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, the worker turns the steel belt 4 toward the steel frame and around the steel frame, and finally inserts the steel belt 4 into the plug-in slot 2002, screws the bolt 108 through the plug-in port 4001, locks the steel belt 4, and fastens the protective cover 1 and the phase sequence plate 3 to the steel frame.

[0037] Although the present invention is described in detail with reference to the above embodiments, it is obvious to those skilled in the art through this disclosure that various changes or modifications may be made to the present invention without departing from the principle and spirit of the present invention defined by the claims. Therefore, the detailed description of the embodiments of the present disclosure is only used to explain, not to limit the present invention, but the scope of protection is limited by the content of the claims.

Claims

1. An overhead line phase sequence plate live installation and removal device, comprising a protective cover (1) and a connection block (2); the protective cover (1) is made of a transparent anti-corrosion material; a connection 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); the device is characterized in that: The invention also comprises a steel belt (4), a clamping plate (102), a locking block (103), a locking assembly and a carrying assembly; the protective cover (1) is detachably connected to the clamping plate (102); a plurality of locking blocks (103) are arranged on the clamping plate (102); each connecting block (2) is rotatably connected to a steel belt (4) for conveniently installing and removing a phase sequence plate (3); the connecting block (2) is connected to a locking assembly; each steel belt (4) is provided with a plug interface (4001); the other end of each steel belt (4) can be clamped to the corresponding locking block (103); and a carrying assembly is placed in front of the protective cover (1) for facilitating workers to carry the phase sequence plate (3).

2. The equipment for installing and removing live phase sequence signs of overhead lines according to claim 1 is characterized in that: The locking assembly comprises a bolt (108) and a shield (109); a bolt (108) is screwed onto the rear side of each connection block (2); a storage cavity (2001) is provided on each connection block (2); each bolt (108) slides in an adjacent storage cavity (2001), and the length of the storage cavity (2001) is greater than the length of the bolt (108); a plug-in slot (2002) is provided on the upper side of each connection block (2), and each plug-in slot (2002) is connected to an adjacent storage cavity (2001); and a shield (109) is slidably connected to each steel belt (4) for preventing rainwater from penetrating into the plug-in slot (2002).

3. The equipment for installing and removing live phase sequence signs of overhead lines 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 facilitating workers to carry the phase sequence plate (3); and each hook (106) is connected to a clamping portion (10601).

4. The equipment for installing and removing live phase sequence signs of overhead lines according to claim 3 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).

5. The equipment for installing and removing live phase sequence signs of overhead lines according to claim 2 is characterized in that: It also includes a sealing sheet (104); a sealing sheet (104) is fixedly connected to the rear side of each connection block (2) via a flexible strip to prevent the bolts (108) from rusting.

6. The equipment for installing and removing live phase sequence signs of overhead lines according to claim 5 is characterized in that: The front end of each bolt (108) is larger than the rear side of the storage cavity (2001).

7. The equipment for installing and removing live phase sequence signs of overhead lines according to claim 2 is characterized in that: Each baffle (109) is made of elastic rubber material.

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

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

10. A method for installing and removing equipment for phase sequence plates on overhead lines under power, characterized by: The method uses the overhead line phase sequence plate live installation and removal device described in claim 9, and comprises the following steps: S1: Assembling, respectively inserting the phase sequence plates (3) into the protective cover (1), and then inserting the clamping plate (102) into the protective cover (1) to fix the phase sequence plates (3); 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), 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, unscrews the locking block (103) to loosen the steel belt (4), and then the worker turns 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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