A preassembled assembly for a variable mounting platform

Abstract

The present application relates to the technical field of transformer substation, and specifically relates to a preassembled combined part of transformer substation, which comprises two wire rods and a mounting seat matched with the wire rods, the mounting seat being used for pre-buried into a concrete base; a connecting assembly is arranged at the bottom of the wire rod and the top of the mounting seat, the connecting assembly being used for connecting the wire rod with the mounting seat inside the concrete base, a pre-grounding module being arranged inside the connecting assembly, the pre-grounding module being used for grounding in advance; an anti-reverse power supply assembly is arranged inside one of the wire rods, the anti-reverse power supply assembly comprising a grounding module and a limiting module. Compared with the prior art, the pre-grounding module inside the connecting assembly cooperates with the grounding module in the anti-reverse power supply assembly, so that the operation stability and emergency disposal capacity of the equipment are enhanced while the power-off automatic closing and power-on automatic isolation are realized, the structure is compact and the response is sensitive, and the equipment has good engineering adaptability and safety and reliability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of distribution transformer rack, and particularly relates to a preassembled assembly of distribution transformer rack. BACKGROUND

[0002] The distribution transformer rack (hereinafter referred to as "distribution transformer rack") as the infrastructure of the distribution network to bear the distribution transformer and related equipment is widely used in urban and rural power distribution systems. The traditional distribution transformer rack is mainly composed of a support structure, an installation platform, a transformer, switchgear and grounding devices, etc., and has the characteristics of simple structure, easy manufacturing and low cost.

[0003] In the prior art, the preassembled lead-in line assembly of the distribution transformer rack disclosed in the Chinese patent document CN218732135U connects the high-voltage line and the transformer through a prefabricated lead-in line. In the connection process, the high-voltage line and the prefabricated lead-in line are fixed by an automatic connection assembly to reduce the traction force at the connection between the high-voltage line and the prefabricated lead-in line, avoid the phenomenon of loosening or falling of the prefabricated lead-in line, ensure the tightness of the connection between the high-voltage line and the prefabricated lead-in line through a terminal plugging assembly, and avoid the situation that the prefabricated lead-in line is exposed to the outside, thereby avoiding the risk of electric leakage. However, like the traditional method, the grounding system of the distribution transformer rack usually adopts fixed grounding or manual grounding. In operation, the grounding is mainly the basic protective grounding of the transformer shell and the ground net, and cannot automatically switch to the anti-back supply protection state in the case of power failure or abnormality. In the maintenance operation, the grounding operation after power failure needs to be performed manually on site, and the grounding action has a delay, which makes it difficult to timely block the risk of back current flowing back to the power grid. Once misfeeding or reverse feeding occurs during power failure maintenance, it is easy to cause equipment damage or personal injury. Therefore, the present application discloses a preassembled assembly of distribution transformer rack. SUMMARY

[0004] Therefore, the present application aims to provide a preassembled assembly of distribution transformer rack to solve the problem that the traditional distribution transformer rack relies on fixed or manual grounding, cannot automatically ground to prevent back supply in the case of power failure or abnormality, and needs manual operation and has a slow response, which easily causes equipment damage and personal injury in the case of misfeeding or reverse feeding.

[0005] In order to achieve the above purpose, the application provides a distribution rack pre-assembled component, which comprises two wire rods and mounting seats matched with the wire rods, the mounting seats are used for being embedded in concrete bases, the wire rods are provided with transformers and wire tensioners, the wire rods are sequentially provided with first, second and third sections of lead-in wires from top to bottom, the top of the first section of lead-in wire is provided with a terminal stopper, the first, second and third sections of lead-in wires are connected by pre-assembled self-locking joints, and the other end of the third section of lead-in wire is connected with the wire tensioner.

[0006] A connecting assembly is arranged at the bottom of the wire rod and the top of the mounting seat, and is used for connecting the wire rod with the mounting seat inside the concrete base, and a pre-grounding module is arranged in the connecting assembly and is used for grounding in advance.

[0007] A reverse power supply prevention assembly is arranged in one of the wire rods, and comprises a grounding module and a limiting module, the grounding module is used for being connected with the pre-grounding module in time after power failure, and the limiting module is used for limiting the grounding module.

[0008] Preferably, the connecting assembly comprises a connecting seat fixedly arranged on the top surface of the mounting seat, a plurality of grounding connecting beads are arranged on the bottom periphery of the connecting seat, the grounding connecting beads are connected with external grounding poles, a connecting block is arranged at the bottom end of the wire rod, a limiting connecting groove is arranged on the bottom of the connecting block, the limiting connecting groove is matched with the grounding connecting beads, a grounding connecting disc is arranged on the inner bottom of the connecting block, the grounding connecting disc is connected with the limiting connecting groove, and a first connecting column is arranged on the top middle portion of the grounding connecting disc.

[0009] Preferably, the grounding module comprises a positioning seat fixedly arranged in the wire rod, a first connecting cylinder is arranged on the top of the positioning seat, a second connecting cylinder is arranged in the first connecting cylinder, a driving rod is slidably arranged in the positioning seat, the first connecting cylinder and the second connecting cylinder, a first reset spring is arranged on one side of the driving rod, the driving rod is provided with a second connecting column, the second connecting column penetrates through the wire rod to the inside of the connecting block, one end of the first reset spring is fixedly connected with one side of the inside of the positioning seat, an extrusion ball is arranged on the top outer surface of the positioning seat, and an extrusion space is arranged in the extrusion ball.

[0010] Preferably, one side of the extrusion ball is provided with a second return spring, the other side of the second return spring is fixedly connected with one end of the extrusion space inside the extrusion ball, one side of the second connecting barrel is provided with a notch, and the driving block is rotatably installed at the notch of the second connecting barrel, the side of the driving block close to the driving rod is provided with a gear tooth, the positioning seat, the extrusion ball, the first return spring, the first connecting barrel and the second connecting barrel are all provided as insulators, the driving rod and the driving block are all provided as conductive grounding bodies, and the driving block is connected with an external low-voltage line in communication.

[0011] Preferably, the first connecting column and the second connecting column are in a cut-off state when powered.

[0012] Preferably, the inside top of the wire rod is provided with an electromagnetic coil, the middle of the electromagnetic coil is provided with an iron core, in the powered state, the electromagnetic coil is directly powered by an external control circuit, the iron core is attracted upward, the bottom of the iron core is rotatably installed with a connecting rod on both sides, the other end of the two connecting rods is rotatably installed with a clamping plate, the two clamping plates are arranged on both sides of the extrusion ball respectively, a first guide plate is fixedly installed on one side of the inner wall of the wire rod, a second guide plate is movably installed on the other side of the inner wall of the wire rod, the first guide plate and the second guide plate are oppositely arranged, and the top surface of one side of the first guide plate and the second guide plate is provided as an inclined surface, after power off, the iron core is driven downward by gravity, or a pressure spring is additionally arranged on the top of the iron core to drive it downward.

[0013] Preferably, the limiting module comprises a limiting step arranged on the side of the first guide plate and the second guide plate away from the electromagnetic coil, the limiting step is provided in a straight face shape, the bottom of the two clamping plates is provided with a limiting block away from the extrusion ball, and the top of the limiting block is also provided as a straight face matched with the limiting step.

[0014] Preferably, a groove is formed in one side of the inner wall of the wire rod, the second guide plate is slidably installed in the groove, two third return springs are arranged on the side of the second guide plate away from the first guide plate, and the other end of the third return spring is fixedly connected with the groove.

[0015] Preferably, the inner wall of the positioning hole is fixedly provided with a fixed sleeve, one side of the fixed sleeve is slidably provided with a pressing sleeve, the middle part of the fixed sleeve is provided with a positioning sleeve, the inside of the positioning sleeve is slidably provided with a reverse connecting rod, one end of the reverse connecting rod is fixedly connected with one end of the second guide plate, the reverse connecting rod and one side of the positioning sleeve are both provided with a driving groove, the inside of the driving groove is slidably provided with a reverse driving plate, the inside of the pressing sleeve is provided with two first trigger blocks in an inclined manner on both sides, both sides of the reverse driving plate are provided with second trigger blocks matched with the first trigger blocks, when the pressing sleeve moves towards the fixed sleeve, the reverse connecting rod moves towards the pressing sleeve under the movement of the reverse driving plate.

[0016] Preferably, one side of the reverse connecting rod close to the pressing sleeve is provided with a fourth reset spring, the other end of the fourth reset spring is fixedly connected with one side of the pressing sleeve.

[0017] The beneficial effects of the present application are as follows:

[0018] 1. The preassembled combination of the distribution transformer rack, by setting the pre-grounding module in the connecting assembly, cooperating with the grounding module in the anti-reverse power supply assembly, the pre-grounding module realizes the basic grounding of the wire rod and the ground net, ensures the integrity of the grounding path; in operation, the anti-reverse power supply assembly can realize the contact of the second connecting column and the first connecting column through mechanical triggering when power failure or abnormality occurs, form rapid grounding, effectively prevent reverse current from flowing back to the power grid, protect personnel and equipment safety, the structure automatically closes when power failure and automatically isolates when power on, at the same time, enhances the operation stability and emergency disposal ability of the equipment, the compact structure, sensitive response, good engineering adaptability and safety and reliability.

[0019] 2. The preassembled combination of the distribution transformer rack, by setting the electromagnetic coil, the core, the clamping plate and the guide plate, when the system is normally powered, the core is attracted upward by electromagnetic force, the clamping plate is opened and does not interfere with the extrusion ball, and electrical isolation is maintained; once power failure, the core quickly moves downward under the action of gravity or spring, the clamping plate rotates with the connecting rod and symmetrically presses the extrusion ball, triggers the grounding mechanism to close, forms a reliable grounding path, avoids equipment damage and personal injury caused by reverse power supply, the structure responds quickly, is mechanically reliable, does not need manual intervention, effectively improves the system automation and power supply safety.

[0020] 3. This type of pre-assembled transformer platform assembly, through the setting of a limit module, achieves reliable locking of the clamping mechanism in the power-off state, preventing clamping failure due to external force or vibration, and ensuring the stability of the grounding closed state. This module, combined with the opposing sliding structure of the first guide plate and the second guide plate, and the second guide plate working with the third reset spring to form reset damping, enhances the holding force of the clamping position. When the system needs to be reset, the reverse drive mechanism is controlled by the external pressing action, driving the reverse connecting rod to move the second guide plate in the opposite direction, thereby releasing the clamping movement path and unlocking the grounding state. This structural design has dual functions of mechanical self-locking and manual release control. The operation process does not require external power supply, ensuring reliability even in power failure or abnormal environments. At the same time, the internal triggering structure of the pressing sleeve, in conjunction with the spring feedback system, can achieve rapid reset and reuse, effectively improving the safety, stability and convenience of the anti-backflow grounding mechanism, and providing a key protection and intelligent closed-loop control foundation for the entire electrical system. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the side structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the rod structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the internal structure of the rod of the present invention;

[0026] Figure 5 This is a schematic diagram of the connection component structure of the present invention;

[0027] Figure 6 This is a schematic diagram of the internal cross-sectional structure of the rod of the present invention;

[0028] Figure 7 For the present invention Figure 6 Enlarged structural diagram at point A in the middle;

[0029] Figure 8 This is a schematic diagram of the grounding module structure of the present invention;

[0030] Figure 9 For the present invention Figure 8 Enlarged structural diagram at point B;

[0031] Figure 10 Figure 2 is a schematic diagram of a partial structure of the limit module of the application.

[0032] Figure 2 is a schematic diagram of a partial structure of the limit module of the application.

[0033] 1, wire rod; 2, transformer; 3, wire tightener; 4, first section of lead-in wire; 5, second section of lead-in wire; 6, third section of lead-in wire; 7, mounting seat; 8, connecting seat; 9, grounding connecting bead; 10, connecting block; 11, limit connecting groove; 12, grounding connecting disc; 13, first connecting column; 14, second connecting column; 15, positioning seat; 16, extruded ball; 17, driving rod; 18, first return spring; 19, first connecting cylinder; 20, second connecting cylinder; 21, driving block; 22, tooth; 23, second return spring; 24, electromagnetic coil; 25, iron core; 26, connecting rod; 27, clamping plate; 28, first guide plate; 29, second guide plate; 30, limit step; 31, limit block; 32, positioning hole; 33, third return spring; 34, fixed sleeve; 35, pressing sleeve; 36, positioning sleeve; 37, reverse connecting rod; 38, driving groove; 39, first trigger block; 40, reverse driving plate; 41, second trigger block; 42, fourth return spring. DETAILED DESCRIPTION

[0034] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to specific examples.

[0035] It should be noted that, unless otherwise defined, technical terms or scientific terms used in the present application should be understood as their common meanings to those having ordinary skills in the art to which the present application pertains. The terms "first", "second" and similar terms used in the present application do not indicate any order, number or importance, but are only used to distinguish different components. The terms "include" or "contain" and similar terms mean that the components or objects before the terms encompass the components or objects listed after the terms and their equivalents, without excluding other components or objects. The terms "connect" or "connected" and similar terms do not mean physical or mechanical connection, but can include electrical connection, whether direct or indirect. The terms "upper", "lower", "left", "right" and the like only represent relative positional relationships, which can change when the absolute positions of the described objects change.

[0036] As Figures 1 to 10As shown, the matching transformer rack pre-assembled assembly includes two wire poles 1 and a mounting seat 7 matched with the wire poles 1, the mounting seat 7 is used for pre-buried in the concrete base, the wire poles 1 are provided with a transformer 2 and a tightener 3, the two wire poles 1 are sequentially provided from top to bottom with a first section of lead-in wire 4, a second section of lead-in wire 5 and a third section of lead-in wire 6, the top of the first section of lead-in wire 4 is provided with a terminal plug, the connection parts between the first section of lead-in wire 4, the second section of lead-in wire 5 and the third section of lead-in wire 6 are all provided with pre-assembled self-locking joints for connection, the other end of the third section of lead-in wire 6 is connected with the tightener 3; a connecting assembly is arranged at the bottom of the wire pole 1 and the top of the mounting seat 7, the connecting assembly is used for connecting the wire pole 1 with the mounting seat 7 inside the concrete base, a pre-grounding module is arranged inside the connecting assembly, the pre-grounding module is used for grounding in advance; an anti-reverse power supply assembly is arranged inside one of the wire poles 1, the anti-reverse power supply assembly includes a grounding module and a limiting module, the grounding module is used for timely connecting with the pre-grounding module after power failure, and the limiting module is used for limiting the grounding module;

[0037] At the construction site, first, the mounting seat 7 is pre-buried in the concrete base, the mounting seat 7 is pre-provided with a butt joint structure for subsequent quick connection with the wire pole 1, the pre-grounding module is embedded at the top of the mounting seat 7 for early grounding, after the concrete solidifies, the wire pole 1 is directly installed on the mounting seat 7 through the connecting assembly at the bottom, the internal structure of the connecting assembly ensures that the wire pole 1 is fixed firmly, during the installation process, the transformer 2 and the tightener 3 on the wire pole 1 are also fixed in place at the same time, then, the first section of lead-in wire 4, the second section of lead-in wire 5 and the third section of lead-in wire 6 are sequentially arranged from top to bottom of the wire pole 1 according to the set position, each section of lead-in wire is connected by the self-locking pre-assembled joint, so that the cable structure is neat, the contact is tight and the maintenance is convenient, and the top terminal plug effectively protects the joint from rainwater and dust invasion;

[0038] During normal power supply operation, the current is transmitted from top to bottom through the lead-in wire to the transformer 2, and then output through the tightener 3; once the system is powered off or fails, the anti-reverse power supply assembly arranged inside one of the wire poles 1 responds immediately, the grounding module inside the anti-reverse power supply assembly is quickly connected with the pre-grounding module in the mounting seat 7 under the drive of the internal mechanism, the emergency grounding operation is completed, and the risk of any possible reverse current back feeding to the line is blocked; the limiting module ensures that the movement path of the grounding module is accurate, the grounding action is quickly in place and cannot be mis-triggered or jammed, and the electrical safety of the equipment in the power-off state is fully guaranteed, which is especially suitable for the case that reverse power supply (such as user-side distributed power supply) is more and more in the distribution network.

[0039] As Figures 3 to 5As shown, the connecting assembly comprises a connecting seat 8 fixedly installed on the top surface of the mounting seat 7, the bottom periphery of the connecting seat 8 is provided with a plurality of grounding connecting beads 9 connected with an external grounding electrode, the bottom end of the wire pole 1 is provided with a connecting block 10, the bottom of the connecting block 10 is provided with a limiting connecting groove 11 matched with the grounding connecting beads 9, the inner bottom of the connecting block 10 is provided with a grounding connecting disc 12 connected with the limiting connecting groove 11, and the top middle of the grounding connecting disc 12 is provided with a first connecting column 13;

[0040] In the installation process, the mounting seat 7 is pre-buried in the concrete base in advance, the top surface of the mounting seat 7 is provided with the connecting seat 8, the bottom periphery of the connecting seat 8 is uniformly distributed with a plurality of grounding connecting beads 9, these connecting beads have been pre-connected with an external ground network or grounding electrode reliably to form an input end of the ground network, when the wire pole 1 needs to be installed, the connecting block 10 provided at the bottom thereof will be aligned downward to the mounting seat 7 as a plug-in main body, in the downward insertion process, the limiting connecting groove 11 at the bottom of the connecting block 10 will be automatically aligned with the corresponding grounding connecting bead 9 to ensure the consistent plug-in direction, after being inserted in place, the grounding connecting disc 12 at the inner bottom of the connecting block 10 will be in direct contact with the grounding connecting bead 9 on the connecting seat 8 to form a double effect of structural contact + electrical conduction, thereby ensuring that the grounding passage of the wire pole 1 body is unobstructed; the first connecting column 13 provided at the center of the grounding connecting disc 12 serves as an access point of a subsequent anti-falling grounding module;

[0041] The ground module comprises a positioning seat 15 fixedly installed inside the wire rod 1, the top of the positioning seat 15 is provided with a first connecting barrel 19, the inside of the first connecting barrel 19 is provided with a second connecting barrel 20, the inside of the positioning seat 15, the first connecting barrel 19 and the second connecting barrel 20 is slidably installed with a driving rod 17, one side of the driving rod 17 is sleeved with a first reset spring 18, the driving rod 17 is provided with a second connecting column 14, the second connecting column 14 penetrates through the inside of the wire rod 1 to the connecting block 10, one end of the first reset spring 18 is fixedly connected with the inside of one side of the positioning seat 15, the top outer surface of the positioning seat 15 is sleeved with a squeezing ball 16, the inside of the squeezing ball 16 is provided with a squeezing space, one side of the squeezing ball 16 is provided with a second reset spring 23, the other side of the second reset spring 23 is fixedly connected with one end of the squeezing space in the inside of the squeezing ball 16, one side of the second connecting barrel 20 is provided with a notch, and the driving block 21 is rotatably installed at the notch of the second connecting barrel 20, the side, close to the driving rod 17, of the driving block 21 is provided with a gear tooth 22, the positioning seat 15, the squeezing ball 16, the first reset spring 18, the first connecting barrel 19 and the second connecting barrel 20 are all provided as insulators, the driving rod 17 and the driving block 21 are all provided as conductive grounding bodies, the driving block 21 is connected with the outside low-voltage line in communication, when the squeezing ball 16 is squeezed, the driving block 21 is pushed to drive the driving rod 17 to move downward, the second connecting column 14 is brought into contact with the first connecting column 13, and grounding operation is performed, the first connecting column 13 and the second connecting column 14 are provided as a cut-off state when electrified;

[0042] When the system is in normal operation, the ground module inside the wire rod 1 is in a standby state, at this time the first connecting column 13 and the second connecting column 14 are separated from each other, the ground passage is not closed, the system is normally powered, at the same time, the extrusion ball 16 is in the original state under the action of the second reset spring 23, no deformation occurs, the driving block 21 remains stationary, the internal conductive driving rod 17 maintains the upward state under the tension of the first reset spring 18, and is not in contact with the bottom grounding column, forming insulation isolation, when power failure or anti-feed situation occurs outside, the operation triggers the action, the extrusion ball 16 is pressed and deformed under force, the second reset spring 23 inside it is compressed, this action makes the driving block 21 on one side of the ball body rotate, the gear teeth 22 engage to push the driving rod 17 to slide downward, realizing stable guided movement in the slide way inside the first connecting cylinder 19 and the second connecting cylinder 20, as the driving rod 17 goes down, the second connecting column 14 connected to the lower end thereof also moves downward synchronously, and finally precisely docks with the first connecting column 13 on the grounding structure of the mounting seat 7, forming a reliable metal conduction path, realizing overall grounding of the equipment and blocking the reverse feedback path of the reverse current, at this time, the driving block 21 can also provide linkage signal feedback due to the connection with the external low-voltage line, and cooperate with the external protection device to realize system alarm, interlocking control or automatic switching, after the system recovers to normal or the operation is released, the extrusion ball 16 is released, the second reset spring 23 and the first reset spring 18 act respectively to reset the extrusion ball 16, reset the driving block 21 and drive the driving rod 17 to move upward, and disconnect the contact between the first connecting column 13 and the second connecting column 14, the system returns to the electrically isolated state.

[0043] As shown in Figures 4 to 9 The inside top of the wire rod 1 is provided with an electromagnetic coil 24, the middle part of the electromagnetic coil 24 is provided with an iron core 25, under the energized state, the electromagnetic coil 24 is directly powered by the external control circuit, the iron core 25 is attracted upward, the bottom sides of the iron core 25 are both rotatably installed with linkage rods 26, the other ends of the two linkage rods 26 are both rotatably installed with clamping plates 27, the two clamping plates 27 are respectively arranged on the two sides of the extrusion ball 16, one side of the inner wall of the wire rod 1 is fixedly installed with a first guide plate 28, the other side of the inner wall of the wire rod 1 is movably installed with a second guide plate 29, the first guide plate 28 and the second guide plate 29 are oppositely arranged, the top surface of one side of the first guide plate 28 and the second guide plate 29 is an inclined surface, after power failure, the iron core 25 is driven downward by gravity, or a pressure spring is additionally arranged on the top of the iron core 25 to drive it downward,

[0044] When the system is in normal power supply state, the electromagnetic coil 24 is continuously powered by connecting with the external control circuit, and the magnetic field generated thereby firmly attracts the iron core 25 to the middle position of the electromagnetic coil 24, keeping the suspended state; at this time, the two connecting rods 26 connected below the iron core 25 are spread to both sides due to the fulcrum effect of the rotating shaft, driving the clamping plates 27 away from the extrusion balls 16, and no triggering action occurs, and the extrusion balls 16 are in a natural resting state. Once the system is powered off, the control circuit is disconnected, or the line fails or is manually disconnected, the electromagnetic coil 24 loses power immediately, and the magnetic force disappears. The iron core 25 rapidly falls downward under the action of gravity. In order to accelerate the response, an additional downward pressure can be provided by adding a pressure spring at the top of the iron core 25. When the iron core 25 falls, it drives the two connecting rods 26 to rotate synchronously, and the two clamping plates 27 connected to the distal end of the connecting rod 26 move inward along the guide plate channel and symmetrically press the two extrusion balls 16 arranged on the inner wall of the wire rod 1. Under the extrusion of the clamping plates 27, the two extrusion balls 16 are compressed and forced, driving the internal driving block 21 to rotate. The teeth 22 on the driving block 21 engage and push the driving rod 17 to slide downward, finally driving the second connecting column 14 to penetrate to the bottom of the wire rod 1 and form physical contact with the first connecting column 13 in the connecting structure of the mounting seat 7, completing the closing of the grounding path. The system immediately takes effect to prevent the grounding line from being reversed, block any feedback current, and protect equipment and personnel safety. When the system is re-powered, the electromagnetic coil 24 re-adsorbs the iron core 25, and the connecting rod 26 and the clamping plate 27 are reset. Under the action of the reset spring, the driving rod 17 and the extrusion ball 16 return to the original position, the system exits the grounding state, and the normal operation is restored.

[0045] As shown in Figure 4 , Figure 6 , Figure 7 , Figure 10 , the limiting module includes a limiting step 30 arranged on the side of the first guide plate 28 and the second guide plate 29 away from the electromagnetic coil 24. The limiting step 30 is arranged in a straight face shape. The bottom of each of the two clamping plates 27 is provided with a limiting block 31. The top of the limiting block 31 is also arranged in a straight face shape matching the limiting step 30. A recess is formed in the side of the inner wall of the wire rod 1. The second guide plate 29 is slidingly arranged in the recess. The side of the second guide plate 29 away from the first guide plate 28 is provided with two third reset springs 33. The other end of the third reset spring 33 is fixedly connected with the recess. A positioning hole 32 is formed in the middle position of the recess.

[0046] When the electromagnetic coil 24 is powered off, the iron core 25 moves downward under the action of gravity or the top pressure spring. The connecting rod 26 clamps the extrusion ball 16 with the clamping plate 27. The limiting blocks 31 on both sides reach below the two first guide plates 28 and the second guide plate 29. At this time, the iron core 25 has fallen to the bottom of the fixed stroke. The limiting blocks 31 on both sides contact and abut against the limiting step 30, preventing reset.

[0047] The inner wall of the positioning hole 32 is fixedly provided with a fixed sleeve 34, one side of the fixed sleeve 34 is slidably provided with a pressing sleeve 35, the middle of the fixed sleeve 34 is provided with a positioning sleeve 36, the inside of the positioning sleeve 36 is slidably provided with a reverse connecting rod 37, one end of the reverse connecting rod 37 is fixedly connected with one end of the second guide plate 29, the reverse connecting rod 37 and one side of the positioning sleeve 36 are both provided with a driving groove 38, the inside of the driving groove 38 is slidably provided with a reverse driving plate 40, the inside of the pressing sleeve 35 is provided with two first trigger blocks 39 in an inclined shape, the two sides of the reverse driving plate 40 are both provided with second trigger blocks 41 matched with the first trigger blocks 39, when the pressing sleeve 35 moves towards the fixed sleeve 34, the reverse connecting rod 37 moves towards the pressing sleeve 35 under the movement of the reverse driving plate 40, one side of the reverse connecting rod 37 close to the pressing sleeve 35 is provided with a fourth reset spring 42, the other end of the fourth reset spring 42 is fixedly connected with one side of the pressing sleeve 35;

[0048] After the device is in a power-off state, the iron core 25 has fallen to the lowest position and the clamping action is completed, the two side limiting blocks 31 abut against the limiting steps 30 to form mechanical locking, preventing the clamping plate 27 from being accidentally loosened under external interference, the guide plate is fixed at the clamping position under the action of the spring, forming an anti-falling power supply grounding closed state, if the grounding needs to be released and the whole system needs to be restored to the standby state, the operator can press the pressing sleeve 35 to make it slide into the fixed sleeve 34, the pressing action will drive the first trigger blocks 39 inside to mesh with the second trigger blocks 41 on the reverse driving plate 40, pushing the reverse driving plate 40 to slide in the driving groove 38 and at the same time driving the reverse connecting rod 37 connected thereto to slide in the pressing direction, this action will drive the second guide plate 29 fixed at the tail end of the reverse connecting rod 37 to slide outward as a whole, forcing the second guide plate 29 to disengage from the original clamping guiding state, releasing the movement space of the clamping plate 27; at the same time, the fourth reset spring 42 at the tail of the reverse connecting rod 37 stores energy in a stressed state, when the operator releases the pressing sleeve 35, the spring rebounds to push the reverse connecting rod 37 and the guide plate to automatically reset, the system completes the structure unlocking, grounding release and position recovery, providing preparation conditions for the electromagnetic system to be powered on again and the next round of closed grounding, realizing the closed-loop control of the whole anti-falling power supply mechanism.

[0049] Those skilled in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to limit the scope (including claims) of the present application to these examples; under the idea of the present application, the above embodiments or technical features in different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as described above. In order to be brief, they are not provided in detail.

[0050] The present application is intended to cover all such alternatives, modifications, and variations as fall within the broad scope of the appended claims. Accordingly, any and all such alternatives, modifications, equivalents, improvements and the like are intended to be encompassed by the present application.

Claims

1. A matching bench preassembled assembly, characterized by, The utility model relates to a kind of line pole and its installation seat, including: Two line poles (1) and the mounting seat (7) matched with the line pole (1), the mounting seat (7) is used to pre-bury into concrete pedestal, transformer (2) and tightener (3) are provided on the line pole (1), first section of the line pole (1) is sequentially provided with first section of the line (4), second section of the line (5), third section of the line (6) from top to bottom, the top of first section of the line (4) is provided with terminal obturator, the junction of first section of the line (4), second section of the line (5), third section of the line (6) is all provided with prefabricated self-locking connector and is connected, the other end of third section of the line (6) is connected with the tightener (3); Connecting assembly, the connecting assembly is arranged at the bottom of the line pole (1) and the top of the mounting seat (7), the connecting assembly is used for connecting the line pole (1) with the mounting seat (7) inside concrete pedestal, the inside of the connecting assembly is provided with pre-grounding module, the pre-grounding module is used for grounding in advance; Anti-supplying assembly, the anti-supplying assembly is arranged in one of the line pole (1), the anti-supplying assembly includes grounding module and limiting module, the grounding module is used to drive and connect with pre-grounding module in time after power failure, the limiting module is used for limiting the grounding module; The connecting assembly includes fixedly installed connecting seat (8) on the top surface of the mounting seat (7), the bottom circumference of the connecting seat (8) is provided with a plurality of grounding connecting beads (9), a plurality of the grounding connecting beads (9) are connected with external grounding electrode, the bottom of the connecting block (10) is provided with a limiting connection groove (11), the limiting connection groove (11) is matched with the grounding connecting bead (9), the inside bottom of the connecting block (10) is provided with grounding connecting disc (12), the grounding connecting disc (12) is connected with the limiting connection groove (11), the top middle part of the grounding connecting disc (12) is provided with first connecting column (13); The grounding module includes positioning seat (15) fixedly installed in the line pole (1), the top of the positioning seat (15) is provided with first connecting cylinder (19), the inside of the first connecting cylinder (19) is provided with second connecting cylinder (20), the inside of the positioning seat (15), first connecting cylinder (19), second connecting cylinder (20) is slidably installed with driving rod (17), one side of the driving rod (17) is provided with first reset spring (18), the driving rod (17) is provided with second connecting column (14), the second connecting column (14) penetrates the line pole (1) to the inside of the connecting block (10), one end of the first reset spring (18) is fixedly connected with the inside one side of the positioning seat (15), the top outer surface of the positioning seat (15) is provided with extrusion ball (16), the inside of the extrusion ball (16) is provided with extrusion space.

2. The matching station of claim 1, wherein, One side of the extrusion ball (16) is provided with a second reset spring (23), the other side of the second reset spring (23) is fixedly connected with one end of the extrusion space inside the extrusion ball (16), one side of the second connecting barrel (20) is provided with a notch, and the driving block (21) is rotatably installed at the notch of the second connecting barrel (20), one side of the driving block (21) close to the driving rod (17) is provided with a gear (22), the positioning seat (15), the extrusion ball (16), the first reset spring (18), the first connecting barrel (19) and the second connecting barrel (20) are all provided as insulators, the driving rod (17) and the driving block (21) are all provided as conductive grounding bodies, the driving block (21) is connected with the external low-voltage line, when the extrusion ball (16) is extruded, the driving block (21) pushes the driving rod (17) downward, drives the second connecting column (14) to contact the first connecting column (13), and grounding operation is performed.

3. The matching station of claim 2, wherein, The first connecting column (13) and the second connecting column (14) are in a disconnected state when powered.

4. The collocated bench prepackaged assembly of claim 3, wherein, The inside top of the wire rod (1) is provided with an electromagnetic coil (24), the middle of the electromagnetic coil (24) is provided with an iron core (25), in the powered state, the electromagnetic coil (24) is directly powered by the external control circuit, the iron core (25) is attracted upward, the bottom of the iron core (25) is rotatably provided with a connecting rod (26) on both sides, the other end of the two connecting rods (26) is rotatably provided with a clamping plate (27), the two clamping plates (27) are arranged on both sides of the extrusion ball (16), one side of the inner wall of the wire rod (1) is fixedly provided with a first guide plate (28), the other side of the inner wall of the wire rod (1) is movably provided with a second guide plate (29), the first guide plate (28) and the second guide plate (29) are oppositely arranged, one side top surface of the first guide plate (28) and the second guide plate (29) is provided as an inclined surface, after power-off, the iron core (25) is driven downward by gravity, or a pressure spring is additionally arranged on the top of the iron core (25) to drive it downward.

5. The collocated bench pre-assembled assembly of claim 4, wherein, The limiting module includes a limiting step (30) arranged on the side of the first guide plate (28) and the second guide plate (29) away from the electromagnetic coil (24), the limiting step (30) is provided in a straight face shape, the bottom of the two clamping plates (27) is provided with a limiting block (31) away from the extrusion ball (16), and the top of the limiting block (31) is also provided as a straight face matched with the limiting step (30).

6. The collocated bench pre-assembled assembly of claim 5, wherein, One side of the inner wall of the wire rod (1) is provided with a groove, the second guide plate (29) is slidably installed in the groove, and the side of the second guide plate (29) away from the first guide plate (28) is provided with two third reset springs (33), the other end of the third reset spring (33) is fixedly connected with the groove, and a positioning hole (32) is arranged at the middle position of the groove.

7. The collocated bench pre-assembled assembly of claim 6, wherein, The inner wall of the positioning hole (32) is fixedly installed with a fixing sleeve (34), one side of the fixing sleeve (34) is slidably installed with a pressing sleeve (35), the middle part of the fixing sleeve (34) is provided with a positioning sleeve (36), the inside of the positioning sleeve (36) is slidably installed with a reverse connecting rod (37), one end of the reverse connecting rod (37) is fixedly connected with one end of the second guide plate (29), the reverse connecting rod (37) and one side of the positioning sleeve (36) are both provided with a driving groove (38), the inside of the driving groove (38) is slidably installed with a reverse driving plate (40), the inside of the pressing sleeve (35) is provided with two first trigger blocks (39) in an inclined shape on both sides, both sides of the reverse driving plate (40) are provided with second trigger blocks (41) matched with the first trigger blocks (39), when the pressing sleeve (35) moves towards the fixing sleeve (34), the reverse connecting rod (37) moves towards the pressing sleeve (35) under the movement of the reverse driving plate (40).

8. The collocated bench pre-assembled assembly of claim 7, wherein, One side of the reverse connecting rod (37) close to the pressing sleeve (35) is provided with a fourth reset spring (42), the other end of the fourth reset spring (42) is fixedly connected with one side of the pressing sleeve (35).

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