A wall sleeve auxiliary dismantling device

Abstract

The present invention belongs to the technical field of through-wall conductive connection devices, and relates to a through-wall sleeve auxiliary disassembly device, comprising three trolleys, divided into two end trolleys and one middle trolley, and the bottoms of the three trolleys are respectively provided with four universal wheels and four bolt supports; the two end trolleys are respectively provided with a pair of support frames, and the middle trolley is provided with four pairs of support frames, and the support frames are respectively provided on two rows of transverse guide rails on the trolley through a slider I; a hydraulic rod is provided at one end of the middle trolley, and the other end of the hydraulic rod is connected to the third support frame on the middle trolley, and the hydraulic rod is a bidirectional hydraulic rod. The present invention can protect the through-wall sleeve during the disassembly and reinstallation process, and try to eliminate the damage and secondary damage caused by human factors, and ensure the smooth completion of the on-site overhaul process.

Description

Technical Field

[0001] The invention belongs to the technical field of wall-penetrating conductive connection devices and relates to an auxiliary disassembly device for a wall-penetrating bushing. Background Art

[0002] The wall bushing is an important part of the DC project and is an essential component used to connect the DC valve hall in the converter station with the external high-voltage circuit. At present, the maintenance process of the faulty wall bushing is as follows: remove the faulty bushing and return it to the factory for repair--transport it back to the production site--gantry suspension bushing withstand voltage test (after reinstalling and removing the adjacent primary equipment, conduct withstand voltage test)--restore the wiring. The weight of a single 500kV wall bushing is close to 3 tons, the maximum diameter is close to 1 meter, and the length is more than 13 meters. For the underdeveloped transportation areas in the west, the economy, effectiveness and safety are all low. The converter stations are basically built in the mountains, which is even more inconvenient for large-scale transportation. At present, the dismantling and reinstallation of the wall bushing are basically carried out by cranes and manual intervention. In the work process, coordination is very important. If you are not careful, it will cause secondary damage to the wall bushing and more problems will occur. Therefore, it is very necessary to seek safe and effective bushing on-site overhaul and auxiliary test devices. Summary of the invention

[0003] The technical problem to be solved by this patent application is to provide a tool that can assist in the on-site disassembly and reinstallation of wall bushings, and can perform good positioning and other auxiliary functions during the disassembly and reinstallation of wall bushings.

[0004] The technical scheme is as follows: an auxiliary disassembly device for wall casing, comprising three trolleys, which are divided into two end trolleys and one middle trolley, and the bottoms of the three trolleys are respectively provided with four universal wheels and four bolt supports; the two end trolleys are respectively provided with a pair of support frames, and the middle trolley is provided with four pairs of support frames, and the support frames are respectively provided on two rows of transverse guide rails on the trolley through a slider I;

[0005] The support frame is composed of a pair of screw slider mechanisms, including a rotating wheel, a screw, a slider II, a longitudinal guide rail and a support. The trolley is provided with a support and a longitudinal guide rail, a rotating wheel is provided at one end of the screw, the screw and the rotating wheel are rotatably provided on the support, a slider II is threadedly provided on the screw, the lower end of the slider II is slidably connected to the longitudinal guide rail, a support seat is provided at the upper end of the slider II, and a support wheel is provided at the upper end of the support seat; a slider I is provided at the lower end of the support seat, and the slider I is slidably connected to the transverse guide rail;

[0006] A hydraulic rod is arranged at one end of the intermediate trolley, and the other end of the hydraulic rod is connected to the third support frame on the intermediate trolley. The hydraulic rod is a bidirectional hydraulic rod, which is convenient for disassembly and reinstallation of the wall sleeve.

[0007] Furthermore, the two screws in the pair of screw slider mechanisms are connected by a coupling. Under the action of the coupling, when the rotating wheel is rotated, a pair of support seats will move closer or farther, so that each set of support wheels can have good contact with the outer wall of the sleeve.

[0008] Beneficial effects:

[0009] The present invention can protect the wall bushing during the disassembly and reinstallation process and eliminate the damage and secondary damage caused by human interference as much as possible, thereby ensuring the smooth completion of the on-site overhaul process. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a front view of the present invention in use;

[0011] Figure 2 A top view of the present invention in use;

[0012] Figure 3 is a cross-sectional view of the support frame;

[0013] Figure 4 for Figure 3 A partial enlarged view

[0014] Among them, 1 is a wall sleeve; 2 is an end trolley; 3 is an intermediate trolley; 4 is a universal wheel; 5 is a bolt support; 6 is a rotating wheel; 7 is a lead screw; 8 is a slider II; 9 is a longitudinal guide rail; 10 is a support; 11 is a support seat; 12 is a support wheel; 13 is a hydraulic rod; 14 is a slider I; 15 is a transverse guide rail; 16 is a coupling. DETAILED DESCRIPTION

[0015] like Figures 1 to 4 The wall sleeve auxiliary disassembly device shown in the figure includes three trolleys, which are divided into two end trolleys 2 and one middle trolley 3. The bottoms of the three trolleys 2 are respectively provided with four universal wheels 4 and four bolt supports 5; the heights of the two end trolleys 2 and the one middle trolley 3 are consistent; the two end trolleys 2 are respectively provided with a pair of support frames, and the middle trolley 3 is provided with four pairs of support frames, which are divided into two groups for supporting two sections of wall sleeves to be connected; the support frames are respectively arranged on two rows of horizontal guide rails 15 on the trolley through sliders I; the bolt support 5 is a support that can be screwed in and out and moved up and down like a bolt, which can fix the trolley to prevent the trolley from moving during the disassembly and reinstallation of the wall sleeve.

[0016] The support frame is composed of a pair of screw and slider mechanisms, including a rotating wheel 6, a screw 7, a slider II8, a longitudinal guide rail 9 and a support 10. The trolley is provided with a support 10 and a longitudinal guide rail 9. A rotating wheel 6 is provided at one end of the screw 7. The screw 7 and the rotating wheel 6 are rotatably arranged on the support 10. A slider II8 is threadedly connected to the screw 7. The lower end of the slider II8 is slidably connected to the longitudinal guide rail 9. A support seat 11 is provided at the upper end of the slider II8, and a support wheel 12 is provided at the upper end of the support seat 11; a slider I14 is provided at the lower end of the support seat 11, and the slider I14 is slidably connected to the transverse guide rail 15; a hydraulic rod 13 is provided at one end of the intermediate trolley 3, and the other end of the hydraulic rod 13 is connected to the third support frame on the intermediate trolley (the three support frames starting from the end where the hydraulic rod 13 is connected to the intermediate trolley 3), and the hydraulic rod 13 is a bidirectional hydraulic rod. There is a fixing mechanism between the longitudinal guide rail on the middle trolley and the longitudinal guide rail on the end trolley and the slider I, which is similar to the guide rail locking mechanism on a lathe.

[0017] Furthermore, the two screws 7 in the pair of screw slider mechanisms are connected via a coupling 16 .

[0018] How it works:

[0019] This technical solution is to realize the on-site dismantling and reinstallation of the wall sleeve by three trolleys with linear guides and several groups of support wheels 12 with adjustable wheel spacing. The three trolleys are placed on the ground, fixed after a relatively simple preliminary alignment, and the wall sleeve is placed on the trolley by a crane. The spacing of each group of support wheels is adjusted, that is, the rotating wheel 6 on the screw slider mechanism is rotated. When the support 10 is fixed, the screw 7 will cause the slider II8 to slide back and forth, driving the support seat 11 and the support wheel 12 to move; under the action of the coupling, when the rotating wheel 6 is rotated, a pair of support seats 11 will move closer or farther, so that each group of support wheels can have good contact with the outer wall of the sleeve.

[0020] After ensuring that all the support wheels 12 are under load, the connecting bolts on the flange of the wall sleeve can be removed. After all the bolts are removed, the guide rail fixing mechanism at the movable end of the intermediate trolley and the guide rail fixing mechanism on the end trolley are loosened. By extending the hydraulic rod 13 on the intermediate trolley to both sides, the two sections of the wall sleeve can be smoothly disengaged along their axis without damaging the structural components such as the wall sleeve tap. The intermediate process can be paused at any time without affecting the working state and causing no secondary damage.

[0021] The reinstallation process is achieved by extending the hydraulic rod 13 on the middle trolley (the hydraulic rod 13 is a bidirectional hydraulic rod) to achieve the reinstallation of the wall sleeve. If there is a slight misalignment of the axis, the height of the axis of the wall sleeve can be changed by adjusting the spacing of the support wheels to ensure that the wall sleeve can be reinstalled smoothly. The operating principle of adjusting the spacing of each group of support wheels is to rotate the wheel 6 on the screw slider mechanism. When the support 10 is fixed, the screw 7 will cause the slider II8 to slide back and forth, driving the support seat 11 and the support wheel 12 to move; under the action of the coupling, when the wheel 6 is rotated, a pair of support seats 11 will move closer or farther, and the support wheel 12 will cause the wall sleeve to move up and down, so that the neutral lines of the two sections of the wall sleeve are in the same straight line. If there is a deviation in the horizontal direction of the two sections of the wall sleeve, the horizontal adjustment can be achieved by moving the end trolley (with universal wheels at the bottom).

[0022] The wall bushing tap is a structure similar to the principle of a plug and a socket. When the wall bushing is assembled, it can fit tightly together, so that both ends of the wall bushing can smoothly conduct 500kV high voltage and large current.

Claims

1. A wall bushing auxiliary disassembly device, characterized in that: It includes three trolleys, which are divided into two end trolleys and one middle trolley. The bottoms of the three trolleys are respectively provided with four universal wheels and four bolt supports; the two end trolleys are respectively provided with a pair of support frames, and the middle trolley is provided with four pairs of support frames, and the support frames are respectively provided on two rows of transverse guide rails on the trolley through sliders I; The support frame is composed of a pair of screw slider mechanisms, including a rotating wheel, a screw, a slider II, a longitudinal guide rail and a support. The trolley is provided with a support and a longitudinal guide rail, a rotating wheel is provided at one end of the screw, the screw and the rotating wheel are rotatably provided on the support, a slider II is threadedly provided on the screw, the lower end of the slider II is slidably connected to the longitudinal guide rail, a support seat is provided at the upper end of the slider II, and a support wheel is provided at the upper end of the support seat; a slider I is provided at the lower end of the support seat, and the slider I is slidably connected to the transverse guide rail; A hydraulic rod is provided at one end of the intermediate trolley, and the other end of the hydraulic rod is connected to the third support frame on the intermediate trolley, and the hydraulic rod is a bidirectional hydraulic rod; The two screws in the pair of screw slider mechanisms are connected via a coupling.

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