A short-circuit connection structure for three-phase terminals of a transformer

Abstract

The present invention relates to the technical field of line end connection, and discloses a short-circuit connection structure of a three-phase terminal of a transformer, including a shell mechanism, wherein the shell mechanism also includes an equipment shell. The present invention utilizes the high hardness of the combined line to set a limit rod, a rotating baffle and a sliding clamping plate inside the equipment. After a worker twists a plurality of lines into a twisted copper wire state, the worker goes deep into the equipment through a line entry tube. During the insertion process, the outer end of the twisted copper wire will contact a trigger plate, and as the worker applies pressure, the twisted copper wire pushes the trigger plate to move along the inner wall of a control slide groove. After the limit rod enters the control slide groove, the restriction on the rotating baffle will be lost. At this time, a push spring will push the sliding clamping plate to clamp toward the center of the equipment along the inner wall of the equipment shell. After the clamping is completed, the worker inserts the output end into the through hole of the transformer and tightens the clamping screw to complete the line installation.

Description

Technical Field

[0001] The invention relates to the technical field of line end connection equipment, in particular to a short-circuit connection structure of a three-phase terminal of a transformer. Background Art

[0002] During the temperature rise test of large transformers, the low voltage a, b, c three-phase terminals need to be short-circuited. After the temperature rise is over and the power is turned off, the low voltage a, b, c three-phase terminals must be short-circuited and disconnected within 2 minutes for resistance measurement. If the disconnection time exceeds 2 minutes before measuring the resistance value, the calculated temperature rise value will not meet the standard requirements. Therefore, after the transformer temperature rise is over and the power is turned off, the low voltage a, b, c three-phase short-circuit must be effectively disconnected as quickly as possible.

[0003] Among them, due to the increase in the required current, the diameter of the wire will continue to increase. In actual application, there is also a phenomenon that multiple lines share one transformer outlet. At this time, the line will be too thick and difficult to insert into the outlet, and even affect the stability of the voltage after power connection. In response to the above problems, the following solutions are proposed. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a transformer three-phase terminal short-circuit connection structure, including a shell mechanism, the shell mechanism also includes a device shell, the side wall of the device shell is connected with a wire entry tube, and the inner wall of the wire entry tube is slidably connected with a twisted copper wire;

[0005] The clamping mechanism includes a push spring fixedly connected to the inner wall of the device housing, an end of the push spring away from the device housing is fixedly connected to a sliding clamping plate, an outer wall of the sliding clamping plate is slidably connected to the inner wall of the device housing, and a hydraulic groove is opened on the inner wall of the sliding clamping plate;

[0006] The limiting mechanism comprises a control slide bar slidably connected to the inner wall of the through hole at the top of the wire inlet pipe, a limit air bag is fixedly connected to the bottom of the control slide bar, and a linkage rod is fixedly connected to the side wall of the control slide bar.

[0007] Preferably, the shell mechanism also includes an output end fixedly connected to the side wall of the device shell, a reinforcing rib is fixedly connected to the outer wall of the device shell, a control slide groove is opened on the inner wall of the device shell, and a trigger plate is slidably connected to the inner wall of the control slide groove. The clamping force generated by the sliding clamp plate is pushed by the above-mentioned push spring. After the twisted copper wire penetrates into the interior of the device, the twisted copper wire is squeezed to increase the tightening force of the copper wire in the twisted copper wire. In addition, the sliding clamp plate is used to squeeze the twisted copper wire, forcing the twisted copper wire to deform and form a barb shape inside the device, thereby avoiding thermal expansion of the twisted copper wire when transmitting current, and loosening of the wire head after the copper wire contracts coldly, affecting the stability of the voltage transmitted by the device.

[0008] Preferably, the housing mechanism also includes a limit rod fixedly connected to the side wall of the trigger plate, and a rotating baffle is rotatably connected to the inner wall of the device housing. Taking advantage of the high hardness of the combined wire, a limit rod, a rotating baffle and a sliding clamp are arranged inside the device. After the worker twists multiple lines into a twisted copper wire state, the worker goes deep into the device through the wire entry tube. During the deepening process, the outer end of the twisted copper wire will contact the trigger plate, and as the worker applies pressure, the twisted copper wire pushes the trigger plate to move along the inner wall of the control slide groove. After the limit rod enters the control slide groove, the restriction on the rotating baffle will be lost. At this time, the push spring will push the sliding clamp along the inner wall of the device housing to clamp toward the center of the device. After the clamping is completed, the staff extends the output end into the through hole of the transformer and tightens the clamping screw to complete the line installation. Through the application of the above components, the device can be applied to cables of various specifications and various types of twisted wires to avoid the twisted wire being too thick, which affects the installation speed of the equipment.

[0009] Preferably, the clamping mechanism also includes hydraulic groove 2 slidably connected to the inner wall of hydraulic groove 1, hydraulic groove 2 is opened at the bottom of the sliding clamp, the inner wall of hydraulic groove 2 is through-connected with the inner wall of hydraulic groove 1, piston plate 2 is slidably connected to the inner wall of hydraulic groove 2, and piston plate 1 is slidably connected to the inner wall of hydraulic groove 1.

[0010] Preferably, the clamping mechanism also includes a plurality of support frames fixedly connected to the bottom of the sliding clamp plate, and the end of the support frame away from the sliding clamp plate is rotatably connected to a prying rod, and the side wall of the prying rod is rotatably connected to a contact rod, and the prying rod and the contact rod are arranged inside the device by utilizing the squeezing force between the sliding clamp plate and the twisted copper wire. When the sliding clamp plate is pushed by the spring and contacts the twisted copper wire, the cross-section of the twisted copper wire is roughly circular, and the highest point and the lowest point of the circle will contact the prying rod, and the prying rod is restricted by the support frame, forcing the contact rod to rotate downward. In this process, since the diameter of hydraulic tank one is larger than that of hydraulic tank two, when the prying rod pushes piston plate one to move upward along the inner wall of hydraulic tank one, the liquid inside hydraulic tank one will enter hydraulic tank two. In this process, the downward movement distance of piston plate two will be several times that of piston plate one. Similarly, piston plate two will push the contact rod to rotate along the side wall of the prying rod, so that the contact rod fits the side of the twisted copper wire, avoiding the twisted copper wire. Because the twisted copper wire causes the contact area between the twisted copper wire and the equipment to be too small, it cannot carry excessively high voltage.

[0011] Preferably, the clamping mechanism also includes a limit block fixedly connected to the top of the contact rod, the bottom of the prying rod is fixedly connected to a power board, the end of the prying rod away from the contact rod is rotatably connected to the end of piston plate one, and the end of the contact rod away from the prying rod is rotatably connected to the end of piston plate two.

[0012] Preferably, the limiting mechanism also includes a U-shaped rod slidably connected to the inner wall of the through hole at the top of the wire entry pipe, the end of the linkage rod away from the control slide rod is fixedly connected to the side wall of the U-shaped rod, and the bottom of the U-shaped rod is fixedly connected to an L-shaped rod. When the U-shaped rod moves downward, it will drive the gear rod to move downward synchronously. During this process, the gear rod squeezes the round head of the spring limit rod 1, so that the spring limit rod 1 moves along the inner wall of the limit bracket, and after the device completes clamping, the vertical surface of the spring limit rod 1 will limit the resetting of the gear rod, thereby avoiding the device clamping loosening due to insufficient internal pushing spring pressure after long-term work.

[0013] Preferably, the limiting mechanism also includes a gear rod fixedly connected to the side wall of the U-shaped rod, a limiting bracket fixedly connected to the side wall of the wire entry tube, a spring limiting rod 1 slidably connected to the inner wall of the limiting bracket, a slot is opened at the side wall of the sliding clamp, and the end of the L-shaped rod away from the U-shaped rod is slidably connected to the spring limiting rod 2. Utilizing the characteristic of the sliding clamp moving downward, a limiting mechanism is arranged inside the equipment, and when the sliding clamp moves downward, the vertical rod of the L-shaped rod and the spring limiting rod 2 are forced to enter the slot. After the spring limiting rod 2 enters the slot, the assembly of the sliding clamp and the L-shaped rod is completed due to its own elasticity. As the sliding clamp continues to move downward, the L-shaped rod drives the control sliding rod and the limiting airbag to move downward through the U-shaped rod, the U-shaped rod and the linkage rod, and clamps the outside of the twisted copper wire, providing a buffer space for the connection position between the equipment and the transmission twisted copper wire, and avoiding the phenomenon of wire skin rupture due to multiple bending at the terminal.

[0014] The present invention has the following beneficial effects:

[0015] (1) The present invention utilizes the high hardness of the combined wire to set a limit rod, a rotating baffle and a sliding clamp inside the device. After the worker twists multiple lines into a twisted copper wire state, the worker goes deep into the device through the wire entry tube. During the deepening process, the outer end of the twisted copper wire will contact the trigger plate, and as the worker applies pressure, the twisted copper wire pushes the trigger plate to move along the inner wall of the control slide. After the limit rod enters the control slide, the limit on the rotating baffle will be lost. At this time, the push spring will push the sliding clamp along the inner wall of the device shell to clamp toward the center of the device. After the clamping is completed, the worker extends the output end into the through hole of the transformer and tightens the clamping screw to complete the line installation. Through the application of the above components, the device can be applied to cables of various specifications and various types of twisted wires, avoiding the occurrence of twisted wires that are too thick and affecting the installation speed of the device.

[0016] (2) The present invention utilizes the clamping force generated by the push spring to push the sliding clamp plate. After the twisted copper wire is extended into the interior of the device, the twisted copper wire is squeezed to increase the tightening force of the copper wire in the twisted copper wire. In addition, the sliding clamp plate is used to squeeze the twisted copper wire to force the twisted copper wire to deform and form a barb shape inside the device, thereby preventing the twisted copper wire from thermally expanding when transmitting current and loosening the wire end after the copper wire contracts coldly, thereby affecting the stability of the voltage transmitted by the device.

[0017] (3) The present invention utilizes the squeezing force between the sliding clamp and the twisted copper wire, and a prying rod and a contact rod are arranged inside the device. When the sliding clamp is pushed by the spring to contact the twisted copper wire, the cross-section of the twisted copper wire is roughly circular, and the highest point and the lowest point of the circle will contact the prying rod, and the prying rod is restricted by the support frame, forcing the contact rod to rotate downward. In this process, since the diameter of hydraulic tank one is larger than the diameter of hydraulic tank two, when the prying rod pushes piston plate one to move upward along the inner wall of hydraulic tank one, the liquid inside hydraulic tank one will enter hydraulic tank two. In this process, the downward movement distance of piston plate two will be several times that of piston plate one upward movement. Similarly, piston plate two will push the contact rod to rotate along the side wall of the prying rod, so that the contact rod fits the side of the twisted copper wire, avoiding the twisted copper wire. Because the twisting of the copper wire causes the contact area between the twisted copper wire and the device to be too small, it cannot bear excessively high voltage.

[0018] (4) The present invention utilizes the characteristic of the sliding clamp plate moving downward, and a limiting mechanism is arranged inside the device. When the sliding clamp plate moves downward, the vertical rod of the L-shaped rod and the spring limiting rod 2 are forced to enter the slot. After the spring limiting rod 2 enters the slot, due to its own elasticity, the assembly of the sliding clamp plate and the L-shaped rod is completed. As the sliding clamp plate continues to move downward, the L-shaped rod drives the control sliding rod and the limiting airbag to move downward through the U-shaped rod, the U-shaped rod and the linkage rod, and clamps the outside of the twisted copper wire, providing a buffer space for the connection position between the device and the transmission twisted copper wire, thereby avoiding the phenomenon of wire skin rupture due to multiple bending at the terminal. In addition, when the U-shaped rod moves downward, it will drive the gear rod to move downward synchronously. In this process, the gear rod squeezes the round head of the spring limiting rod 1, so that the spring limiting rod 1 moves along the inner wall of the limiting bracket. After the device completes the clamping, the vertical surface of the spring limiting rod 1 will limit the reset of the gear rod, thereby avoiding the phenomenon of the device clamping loosening due to insufficient internal pushing spring pressure after long-term operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the internal components of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the internal components of the housing mechanism of the present invention;

[0023] Figure 4 For the present invention Figure 3 A is an enlarged schematic diagram;

[0024] Figure 5 It is a cross-sectional schematic diagram of the clamping mechanism of the present invention;

[0025] Figure 6 It is a schematic diagram of the internal components of the clamping mechanism of the present invention;

[0026] Figure 7 For the present invention Figure 3 A magnified schematic diagram of B;

[0027] Figure 8 It is a schematic diagram of the internal components of the limiting mechanism of the present invention;

[0028] Fig. 9 For the present invention Figure 8 A magnified schematic diagram of middle C;

[0029] Fig.10 For the present invention Figure 8 A magnified schematic diagram of D in the middle.

[0030] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0031] In the figure: 1. Shell mechanism; 101. Equipment shell; 102. Wire inlet pipe; 103. Twisted copper wire; 104. Output end; 105. Reinforcement rib; 106. Control slide; 107. Trigger plate; 108. Limit rod; 109. Rotating baffle; 2. Clamping mechanism; 201. Push spring; 202. Sliding clamp; 203. Hydraulic groove 1; 204. Hydraulic groove 2; 205. Piston plate 1; 206. 6. Piston plate 2; 207. Support frame; 208. Pry rod; 209. Contact rod; 210. Limit block; 211. Power board; 3. Limiting mechanism; 301. Control slide bar; 302. Limiting airbag; 303. Linking rod; 304. U-shaped rod; 305. L-shaped rod; 306. Gear rod; 307. Limiting bracket; 308. Spring limiting rod 1; 309. Slot; 310. Spring limiting rod 2. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] For example, see Figure 1 - Figure 3 The present invention is a short-circuit connection structure of a three-phase terminal of a transformer, comprising a housing mechanism 1, the housing mechanism 1 also comprising a device housing 101, a wire entry tube 102 is connected through the side wall of the device housing 101, and a twisted copper wire 103 is slidably connected to the inner wall of the wire entry tube 102;

[0034] The clamping mechanism 2 includes a push spring 201 fixedly connected to the inner wall of the device housing 101, and one end of the push spring 201 away from the device housing 101 is fixedly connected to a sliding clamp 202, and the outer wall of the sliding clamp 202 is slidably connected to the inner wall of the device housing 101, and a hydraulic groove 203 is opened on the inner wall of the sliding clamp 202;

[0035] The limiting mechanism 3 includes a control slide bar 301 slidably connected to the inner wall of the through hole at the top of the wire entry tube 102 , a limiting airbag 302 is fixedly connected to the bottom of the control slide bar 301 , and a linkage rod 303 is fixedly connected to the side wall of the control slide bar 301 .

[0036] The housing mechanism 1 also includes an output terminal 104 fixedly connected to the side wall of the device housing 101, a reinforcing rib 105 fixedly connected to the outer wall of the device housing 101, a control slide groove 106 is opened on the inner wall of the device housing 101, and a trigger plate 107 is slidably connected to the inner wall of the control slide groove 106. The clamping force generated by the sliding clamp 202 is pushed by the above-mentioned push spring 201. After the twisted copper wire 103 penetrates into the interior of the device, the twisted copper wire 103 is squeezed to increase the tightening force of the copper wire in the twisted copper wire 103. In addition, the sliding clamp 202 is used to squeeze the twisted copper wire 103, forcing the twisted copper wire 103 to deform and form a barb shape inside the device, so as to avoid the twisted copper wire 103 from causing thermal expansion of the copper wire when transmitting current, and loosening of the wire head after the copper wire contracts coldly, thereby affecting the stability of the voltage transmitted by the device.

[0037] The housing mechanism 1 also includes a limit rod 108 fixedly connected to the side wall of the trigger plate 107, and a rotating baffle 109 is rotatably connected to the inner wall of the device housing 101. By utilizing the high hardness of the combined wire, the limit rod 108, the rotating baffle 109 and the sliding clamp 202 are arranged inside the device. After the worker twists the multiple lines into a state of twisted copper wires 103, the worker goes deep into the device through the wire entry tube 102. During the deepening process, the outer end of the twisted copper wire 103 will contact the trigger plate 107, and as the worker applies pressure, the twisted copper wire 103 pushes the trigger plate 107. 7 moves along the inner wall of the control slide groove 106. After the limit rod 108 enters the control slide groove 106, the restriction on the rotating baffle 109 will be lost. At this time, the push spring 201 will push the sliding clamp 202 along the inner wall of the device housing 101 to clamp the device center. After the clamping is completed, the staff extends the output end 104 into the through hole of the transformer and tightens the clamping screw to complete the line installation. Through the application of the above components, the device can be applied to cables of various specifications and various types of twisted wires to avoid the twisted wire being too thick and affecting the installation speed of the equipment.

[0038] For example 2, please refer to Figure 4 - Fig.10 The present invention is a short-circuit connection structure for three-phase terminals of a transformer. On the basis of Example 1, the clamping mechanism 2 also includes a hydraulic groove 204 slidably connected to the inner wall of the hydraulic groove 1 203. A hydraulic groove 204 is provided at the bottom of the sliding clamp 202. The inner wall of the hydraulic groove 204 is through-connected with the inner wall of the hydraulic groove 1 203. A piston plate 206 is slidably connected to the inner wall of the hydraulic groove 204. A piston plate 1 205 is slidably connected to the inner wall of the hydraulic groove 1 203.

[0039] The clamping mechanism 2 also includes a plurality of support frames 207 fixedly connected to the bottom of the sliding clamp plate 202. The end of the support frame 207 away from the sliding clamp plate 202 is rotatably connected to a prying rod 208. The side wall of the prying rod 208 is rotatably connected to a contact rod 209. The prying rod 208 and the contact rod 209 are arranged inside the device by utilizing the squeezing force between the sliding clamp plate 202 and the twisted copper wire 103. When the sliding clamp plate 202 is pushed by the push spring 201 to contact the twisted copper wire 103, since the cross-section of the twisted copper wire 103 is roughly circular, the highest point and the lowest point of the circle will contact the prying rod 208, and the prying rod 208 is restricted by the support frame 207, forcing the contact rod 209 to move downward. During the rotation, since the diameter of hydraulic groove 1 203 is larger than the diameter of hydraulic groove 2 204, when the prying rod 208 pushes piston plate 1 205 to move upward along the inner wall of hydraulic groove 1 203, the liquid inside hydraulic groove 1 203 will enter hydraulic groove 2 204. During this process, the downward movement distance of piston plate 206 will be several times that of piston plate 1 205 moving upward. Similarly, piston plate 206 will push contact rod 209 to rotate along the side wall of prying rod 208, so that contact rod 209 fits the side of twisted copper wire 103, avoiding the twisted copper wire 103, because the twisting of the copper wire causes the contact area between the twisted copper wire 103 and the equipment to be too small, and therefore cannot bear excessively high voltage.

[0040] The clamping mechanism 2 also includes a limit block 210 fixedly connected to the top of the contact rod 209, and the bottom of the prying rod 208 is fixedly connected to a power board 211. The end of the prying rod 208 away from the contact rod 209 is rotatably connected to the end of the piston plate 1 205, and the end of the contact rod 209 away from the prying rod 208 is rotatably connected to the end of the piston plate 206.

[0041] The limiting mechanism 3 also includes a U-shaped rod 304 slidably connected to the inner wall of the through hole at the top of the wire entry pipe 102, and the end of the linkage rod 303 away from the control slide rod 301 is fixedly connected to the side wall of the U-shaped rod 304, and the bottom of the U-shaped rod 304 is fixedly connected to an L-shaped rod 305. When the U-shaped rod 304 moves downward, it will drive the gear rod 306 to move downward synchronously. In this process, the gear rod 306 squeezes the round head of the spring limit rod 308, so that the spring limit rod 308 moves along the inner wall of the limit bracket 307. After the device completes the clamping, the vertical surface of the spring limit rod 308 will limit the reset of the gear rod 306, so as to avoid the device from being loosened due to insufficient pressure of the internal push spring 201 after long-term operation.

[0042] The limiting mechanism 3 also includes a toothed rod 306 fixedly connected to the side wall of the U-shaped rod 304, a limiting bracket 307 fixedly connected to the side wall of the wire entry tube 102, a spring limiting rod 1 308 slidably connected to the inner wall of the limiting bracket 307, a slot 309 is provided on the side wall of the sliding clamp 202, and a spring limiting rod 2 310 is slidably connected to the end of the L-shaped rod 305 away from the U-shaped rod 304. By utilizing the characteristic that the sliding clamp 202 moves downward, a limiting mechanism 3 is arranged inside the device. When the sliding clamp 202 moves downward, the vertical rod and the spring of the L-shaped rod 305 are forced to move downward. The second limiting rod 310 enters the slot 309. After the spring limiting rod 310 enters the slot 309, due to its own elasticity, the assembly of the sliding clamp 202 and the L-shaped rod 305 is completed. As the sliding clamp 202 continues to move downward, the L-shaped rod 305 drives the control slide rod 301 and the limiting airbag 302 to move downward through the U-shaped rod, U-shaped rod 304 and the linkage rod 303, clamping the outside of the twisted copper wire 103, providing a buffer space for the connection position between the equipment and the transmission twisted copper wire 103, and avoiding the phenomenon of wire skin rupture due to multiple bending at the terminal.

[0043] A specific application of this embodiment is: before use, the present invention ensures that workers screw multiple lines into a state of twisted copper wire 103. By utilizing the high hardness of the combined wire, a limit rod 108, a rotating baffle 109 and a sliding clamp 202 are set inside the device, and the wire tube 102 penetrates into the inside of the device. During the penetration process, the outer end of the twisted copper wire 103 will contact the trigger plate 107, and as the worker applies pressure, the twisted copper wire 103 pushes the trigger plate 107 to move along the inner wall of the control slide 106. After the limit rod 108 enters the control slide 106, the limit on the rotating baffle 109 will be lost. At this time, the push spring 201 will push the sliding clamp 202 along the device. The inner wall of the equipment housing 101 is clamped toward the center of the equipment. After the clamping is completed, the staff extends the output terminal 104 into the through hole of the transformer and tightens the clamping screw to complete the line installation. The clamping force generated by the sliding clamp 202 is pushed by the above-mentioned push spring 201. After the twisted copper wire 103 penetrates into the interior of the equipment, the twisted copper wire 103 is squeezed to increase the tightening force of the copper wire in the twisted copper wire 103. In addition, the sliding clamp 202 is used to squeeze the twisted copper wire 103, forcing the twisted copper wire 103 to deform and form a barb shape inside the equipment to prevent the twisted copper wire 103 from causing thermal expansion of the copper wire during the transmission of current, and loosening of the wire head after the copper wire contracts coldly, affecting the stability of the transmission voltage of the equipment.

[0044] By utilizing the squeezing force between the sliding clamp plate 202 and the twisted copper wire 103, a prying rod 208 and a contact rod 209 are arranged inside the device. When the sliding clamp plate 202 is pushed by the spring 201 to contact the twisted copper wire 103, since the cross section of the twisted copper wire 103 is roughly circular, the highest point and the lowest point of the circle will contact the prying rod 208, and the prying rod 208 is restricted by the support frame 207, forcing the contact rod 209 to rotate downward. In this process, since the diameter of the hydraulic groove 1 203 is larger than the diameter of the hydraulic groove 2 204, when the prying rod 208 pushes When the piston plate 1 205 moves upward along the inner wall of the hydraulic groove 1 203, the liquid inside the hydraulic groove 1 203 will enter the inside of the hydraulic groove 2 204. During this process, the downward movement distance of the piston plate 206 will be several times that of the upward movement of the piston plate 1 205. Similarly, the piston plate 206 will push the contact rod 209 to rotate along the side wall of the prying rod 208, so that the contact rod 209 fits the side of the twisted copper wire 103, avoiding the twisted copper wire 103, because the twisting of the copper wire causes the contact area between the twisted copper wire 103 and the equipment to be too small, and therefore cannot carry excessively high voltage.

[0045] Taking advantage of the downward movement of the sliding clamp 202, a limiting mechanism 3 is provided inside the device. When the sliding clamp 202 moves downward, the vertical rod of the L-shaped rod 305 and the second spring limiting rod 310 are forced to enter the slot 309. After the second spring limiting rod 310 enters the slot 309, the assembly of the sliding clamp 202 and the L-shaped rod 305 is completed due to its own elasticity. As the sliding clamp 202 continues to move downward, the L-shaped rod 305 drives the control sliding rod 301 and the limiting airbag 302 to move downward through the U-shaped rod 304 and the linkage rod 303, thereby clamping the outside of the twisted copper wire 103. The connection position between the equipment and the transmission twisted copper wire 103 provides a buffer space to prevent the wire skin from breaking due to multiple bending at the terminal; in addition, when the U-shaped rod 304 moves downward, the gear rod 306 will be driven to move downward synchronously. During this process, the gear rod 306 squeezes the round head of the spring limit rod 308, causing the spring limit rod 308 to move along the inner wall of the limit bracket 307. After the equipment completes the clamping, the vertical surface of the spring limit rod 308 will limit the reset of the gear rod 306, preventing the equipment from loosening due to insufficient pressure of the internal push spring 201 after long-term operation.

[0046] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A transformer three-phase terminal short-circuit connection structure, comprising a housing mechanism (1), the housing mechanism (1) further comprising a device housing (101), a wire entry tube (102) penetratingly connected to a side wall of the device housing (101), a twisted copper wire (103) slidably connected to an inner wall of the wire entry tube (102), characterized in that: Also includes: A clamping mechanism (2), the clamping mechanism (2) comprising a push spring (201) fixedly connected to the inner wall of the device housing (101), one end of the push spring (201) away from the device housing (101) being fixedly connected to a sliding clamping plate (202), the outer wall of the sliding clamping plate (202) being slidably connected to the inner wall of the device housing (101), and a hydraulic groove (203) being provided on the inner wall of the sliding clamping plate (202); A limiting mechanism (3), the limiting mechanism (3) comprising a control slide bar (301) slidably connected to the inner wall of the through hole at the top of the wire inlet tube (102), the bottom of the control slide bar (301) being fixedly connected to a limiting air bag (302), and the side wall of the control slide bar (301) being fixedly connected to a linkage rod (303); The housing mechanism (1) further comprises an output end (104) fixedly connected to a side wall of the device housing (101); a reinforcing rib (105) is fixedly connected to the outer wall of the device housing (101); a control slide groove (106) is provided on the inner wall of the device housing (101); and a trigger plate (107) is slidably connected to the inner wall of the control slide groove (106); The housing mechanism (1) further comprises a limit rod (108) fixedly connected to the side wall of the trigger plate (107), and a rotating baffle (109) is rotatably connected to the inner wall of the device housing (101).

2. A transformer three-phase terminal short-circuit connection structure according to claim 1, characterized in that: The clamping mechanism (2) also includes a hydraulic groove 2 (204) slidably connected to the inner wall of the hydraulic groove 1 (203); a hydraulic groove 2 (204) is provided at the bottom of the sliding clamp (202); the inner wall of the hydraulic groove 2 (204) is connected to the inner wall of the hydraulic groove 1 (203); a piston plate 2 (206) is slidably connected to the inner wall of the hydraulic groove 2 (204); and a piston plate 1 (205) is slidably connected to the inner wall of the hydraulic groove 1 (203).

3. A transformer three-phase terminal short-circuit connection structure according to claim 2, characterized in that: The clamping mechanism (2) further comprises a plurality of support frames (207) fixedly connected to the bottom of the sliding clamp plate (202); one end of the support frame (207) away from the sliding clamp plate (202) is rotatably connected to a prying rod (208); and a contact rod (209) is rotatably connected to the side wall of the prying rod (208).

4. A transformer three-phase terminal short-circuit connection structure according to claim 3, characterized in that: The clamping mechanism (2) further comprises a limit block (210) fixedly connected to the top of the contact rod (209); the bottom of the prying rod (208) is fixedly connected to a power board (211); one end of the prying rod (208) away from the contact rod (209) is rotatably connected to the end of the first piston plate (205); and one end of the contact rod (209) away from the prying rod (208) is rotatably connected to the end of the second piston plate (206).

5. A transformer three-phase terminal short-circuit connection structure according to claim 4, characterized in that: The limiting mechanism (3) further comprises a U-shaped rod (304) slidably connected to the inner wall of the through hole at the top of the wire inlet pipe (102); one end of the linkage rod (303) away from the control slide rod (301) is fixedly connected to the side wall of the U-shaped rod (304); and the bottom of the U-shaped rod (304) is fixedly connected to an L-shaped rod (305).

6. A transformer three-phase terminal short-circuit connection structure according to claim 5, characterized in that: The limiting mechanism (3) further comprises a gear rod (306) fixedly connected to the side wall of the U-shaped rod (304); a limiting bracket (307) is fixedly connected to the side wall of the wire entry tube (102); a spring limiting rod 1 (308) is slidably connected to the inner wall of the limiting bracket (307); a slot (309) is provided on the side wall of the sliding clamp (202); and a spring limiting rod 2 (310) is slidably connected to the end of the L-shaped rod (305) away from the U-shaped rod (304).

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