Handcart type circuit breaker turnover

Abstract

The handcart-type circuit breaker tilting device of this invention features locking pins on both sides of the device mounting mechanism. These locking pins have protruding teeth that engage with the toothed grooves on the extension plates on both sides of the tilting disc. When the clamping screw is rotated, the mounting brackets and locking pins on the device move closer to the extension plates. When the protruding teeth enter the toothed grooves, the sliding frames on both sides are securely locked along the length of the extension plates. The device mounting mechanism adopts a detachable design. Mounting brackets are installed on two mounting rods, and the mounting brackets have connecting bolts that mate with the screw holes on the device, facilitating quick and easy mounting of the device onto the tilting device. Simultaneously, a detachable retaining tube is provided at the end of the mounting rod extending from the mounting bracket, facilitating positioning during device installation and disassembly. This also ensures that the protruding teeth and toothed grooves mutually limit each other, locking the sliding frames on both sides onto the extension plates and guaranteeing that the device's position remains relatively unchanged during repeated tilting operations.

Description

Technical Field

[0001] This invention relates to the technical field of handcart-type circuit breaker maintenance devices, specifically handcart-type circuit breaker switching equipment. Background Technology

[0002] In recent years, handcart-type circuit breakers have been widely used in power systems due to their advantages such as compact structure, flexible operation, and ease of maintenance. Consequently, fault repair of handcart-type circuit breakers has become a common task in current substation maintenance work. During the repair and replacement of handcart-type circuit breaker chassis, a key and tedious step is to repeatedly flip, disassemble, and adjust the handcart-type circuit breaker.

[0003] However, due to the significant weight of circuit breakers, the specialized maintenance tools currently used are prone to slipping at the locked position when performing the flipping operation. This slippage can cause misalignment of the circuit breaker's installation, hindering subsequent installation and commissioning work. This not only increases the difficulty and time cost of maintenance but may also affect the normal operation of the circuit breaker, posing a potential threat to the stability and safety of the power system. Therefore, developing a device that can stably and reliably flip the equipment is of significant practical importance. Summary of the Invention

[0004] The purpose of this invention is to provide a handcart-type circuit breaker flipping device, which uses locking pins and matching toothed grooves on both sides of the device mounting mechanism, along with a clamping screw, to position and clamp the device, thereby achieving relative locking during the flipping process and solving the problems in the prior art.

[0005] The technical solution adopted by this invention to solve its technical problem is: a handcart-type circuit breaker tipping device, characterized in that: it includes a frame, with outwardly extending travel rods installed at both ends of the frame, a travel wheel installed at the end of each travel rod away from the frame, casters corresponding to the travel wheels installed at the bottom of the frame, a vertically arranged push frame installed on one side of the frame, a vertically movable lifting seat installed on the frame, a rotatable tipping disc provided at the end of the lifting seat away from the push frame, the axis of the tipping disc being parallel to the length direction of the travel rods, extension plates installed on both sides of the tipping disc, and a detachable equipment mounting mechanism installed between the two extension plates, the equipment mounting mechanism including two side-by-side mounting rods, each mounting rod having a mounting sleeve installed on it, the mounting sleeve having connecting bolts that mate with screw holes on the equipment, and the two mounting rods passing through... One end of the mounting bracket is equipped with a detachable stop tube, which is arranged perpendicular to the mounting rod. The end of the mounting rod near the extension plate is equipped with a corresponding sliding frame. Two sets of clamping guide wheels are installed side by side in the sliding frame. The extension plate is located between the two sets of clamping guide wheels. A long groove is opened on the extension plate along the length direction. A through groove is opened on the sliding frame to cooperate with the long groove. A locking pin is installed on the mounting bracket. The upper and lower sides of the locking pin near the end of the long groove are provided with inclined surfaces. Each inclined surface is provided with protruding teeth. A toothed groove is provided in the long groove to cooperate with the protruding teeth. The toothed groove is arranged along the length direction of the long groove. A clamping screw is also installed on the stop tube. Rotating the clamping screw can move the mounting bracket and locking pin on the equipment closer to the extension plate. When the protruding teeth on the locking pin enter the long groove and cooperate with the toothed groove, the sliding frames on both sides are locked in the length direction of the extension plate.

[0006] The length of the walking rod is greater than the height of the push frame. A rotatable auxiliary bracket is hinged to the upper end of the push frame. A pin is provided on the auxiliary bracket. The push frame has a first insertion hole and a second insertion hole that cooperate with the pin. When the pin is in the first insertion hole, the auxiliary bracket is aligned with the push frame. When the pin is in the second insertion hole, the auxiliary bracket is tilted to the side away from the lifting seat. A lifting grab rod is installed on the inner side of the walking rod through a torsion spring. The torsion spring always tends to push the lifting grab rod to rotate and move closer to the walking rod. When the auxiliary bracket is aligned with the push frame, grasping the lifting grab rod upwards can position the push frame at the bottom of the overall device.

[0007] A lifting nut is installed on the inner side of the walking rod near the walking wheel. A lifting screw is installed inside the lifting nut. A positioning rubber base is installed at the end of the lifting screw that extends downward through the lifting nut. A handwheel is installed at the end of the clamping screw away from the rubber pad.

[0008] A first motor is mounted on the frame, and a lead screw is connected to the output shaft of the first motor. A lead screw nut is fitted onto the lead screw. First scissor arms are provided on both sides of the lead screw nut. A second scissor arm is hinged to each first scissor arm. One end of the first scissor arm is hinged to the bottom of the lifting seat, and the other end of the first scissor arm is fitted with a first grooved wheel. A first guide rod that mates with the first grooved wheel is mounted on the frame. One end of the second scissor arm is hinged to the frame, and the other end of the second scissor arm is fitted with a second grooved wheel. A second guide rod that mates with the second grooved wheel is mounted at the bottom of the lifting seat. When the first motor is started, it can drive the lifting seat to move vertically relative to the frame.

[0009] A second motor is installed inside the lifting seat. A drive gear is provided on the output shaft of the second motor. A slewing bearing is installed between the lifting seat and the tilting disc. The inner ring of the slewing bearing is fixed on the lifting seat. Corresponding to the position of the inner ring, a reinforcing rib plate seat is also provided inside the lifting seat. The outer ring of the slewing bearing is provided with a gear ring that meshes with the drive gear. The tilting disc is fixedly mounted on the outer ring of the slewing bearing. When the second motor is started, it can drive the tilting disc and the equipment mounting mechanism to rotate.

[0010] The end of the mounting rod away from the flip plate is fitted with a first bracket, which contains an insertion screw. The end of the mounting rod is provided with several insertion holes that mate with the insertion screw. A second bracket that mates with the stop tube is installed on the first bracket. The second bracket is provided with a locking bolt that can press down and limit the stop tube. A rubber pressure pad is installed on the end of the clamping screw that protrudes from the stop tube.

[0011] A return spring is installed at one end of the mounting bracket near the sliding frame. When the protruding teeth on the locking pin enter the long groove and cooperate with the tooth groove, the return spring is in a compressed state.

[0012] The positive effects of this invention are as follows: The handcart-type circuit breaker tilting device of this invention, by setting locking pins on both sides of the device mounting mechanism, the locking pins having protruding teeth that cooperate with the toothed grooves on the extension plates on both sides of the tilting disc, when the clamping screw is rotated to move the mounting bracket and locking pins on the device closer to the extension plate, when the protruding teeth enter the toothed grooves, the sliding frames on both sides can be firmly locked in the length direction of the extension plate. The device mounting mechanism adopts a detachable design, with mounting brackets installed on two mounting rods. The mounting brackets are provided with connecting bolts that cooperate with the screw holes on the device, facilitating quick and easy mounting of the device onto the tilting device. At the same time, one end of the mounting rod extending out of the mounting bracket has a detachable stop tube, which facilitates the positioning of the device during installation and disassembly, while ensuring that the protruding teeth and toothed grooves mutually limit each other, locking the sliding frames on both sides onto the extension plate, ensuring that the relative position of the device remains unchanged during repeated tilting operations.

[0013] This design effectively solves the problem of slippage that occurs when existing maintenance tools are subjected to the heavy weight and strong pulling force of circuit breakers during repeated flipping operations. It ensures the precise positioning of the equipment during the flipping process, avoids subsequent installation and commissioning work being unable to proceed smoothly due to installation position deviations, greatly improves the reliability and success rate of maintenance work, and ensures the stable operation of circuit breakers and even the entire power system. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is the front view of the present invention; Figure 3 yes Figure 2 Top view; Figure 4 yes Figure 2 The right view; Figure 5 yes Figure 2 Rear view; Figure 6 This is a schematic diagram of the structure of the equipment mounting mechanism on the flip plate; Figure 7 This is a schematic diagram of the sliding bracket mounted on the extension plate; Figure 8 This is a schematic diagram showing the usage status of the mounting mechanism and the equipment. Figure 9 This is a schematic diagram showing the state in which the protruding teeth on the locking pin enter the long groove and engage with it. Figure 10 This is a simplified schematic diagram showing the tooth not yet engaging with the tooth groove. Figure 11 This is a schematic diagram of the structure with auxiliary supports installed on the push frame; Figure 12 This is a partial structural diagram of the inner side of the walking pole; Figure 13 This is a schematic diagram showing the state in which the front end of the walking rod tilts up when the auxiliary support is tilted relative to the push frame. Figure 14 This is a schematic diagram of the inverted storage state when the auxiliary support is aligned with the push frame; Figure 15 This is a structural diagram of the frame and the lifting seat; Figure 16 This is a partial sectional view of the lifting seat; Figure 17 This is a schematic diagram of the connection structure between the mounting rod and the stop tube. Detailed Implementation

[0015] The handcart-type circuit breaker switching device of the present invention, such as Figure 1-6As shown, the device includes a frame 1, which serves as the structure and mounting base for the entire device. Outwardly extending travel rods 2 are installed at both ends of the frame 1. Travel wheels 3 are installed at the ends of each travel rod 2 away from the frame 1. Universal wheels 4, corresponding to the travel wheels 3, are installed at the bottom of the frame 1. A vertically arranged push frame 20 is installed on one side of the frame 1. The entire device can be moved by pulling the push frame 20.

[0016] The frame 1 is equipped with a vertically movable lifting seat 5. At the end of the lifting seat 5 furthest from the push frame 20, there is a rotatable tilting plate 6. The axis of the tilting plate 6 is parallel to the length direction of the traveling rod 2. The tilting plate 6 is used to mount the circuit breaker equipment to be inspected. The lifting seat 5 can achieve its own vertical lifting and lowering through existing lifting cylinders, lifting motors, or other devices to adapt to the installation and operation of circuit breakers at different heights. The tilting plate 6 can achieve its own rotational drive through existing rotary motors or positioners, driving the circuit breaker equipment to rotate synchronously. The parallel arrangement of the axis of the tilting plate 6 to the length direction of the traveling rod 2 ensures the stability of the entire device when the equipment is mounted.

[0017] Extension plates 7 are installed on both sides of the flip plate 6, and a detachable equipment mounting mechanism is installed between the extension plates 7 on both sides to realize the mounting and flipping operation of circuit breakers of different sizes and types, such as... Figure 6-10 As shown, the equipment mounting mechanism includes two mounting rods 8 arranged side by side, which can be respectively mounted on the extension plates 7 on both sides. Each mounting rod 8 is fitted with a mounting bracket 9, which is provided with connecting bolts 10 that mate with the screw holes on the equipment. The mounting bracket 9 can be mounted on the circuit breaker equipment through the connecting bolts 10, and the circuit breaker equipment can be raised and lifted by the lifting seat 5 through the mounting rod 8 passing through the mounting bracket 9.

[0018] Two mounting rods 8 extend out of the mounting bracket 9 and are provided with detachable baffles 11. The baffles 11 are arranged perpendicular to the mounting rods 8. The baffles 11 can form a barrier and limit the other side of the circuit breaker equipment. The baffles 11, the two mounting rods 8 on both sides and the flip plate 6 form a barrier and limit the installation of the circuit breaker equipment around its perimeter.

[0019] To enable adjustable installation of the mounting rod 8 along its length on the extension plate 7 to accommodate circuit breaker devices of different widths, a matching sliding frame 12 is provided at one end of the mounting rod 8 near the extension plate 7. Two sets of clamping guide wheels 13 are installed side by side inside the sliding frame 12. The extension plate 7 is located between the two sets of clamping guide wheels 13. The installation limit and movement guidance of the sliding frame 12 on the extension plate 7 are achieved through the clamping guide wheels 13.

[0020] To achieve relative locking of the sliding frame 12 on the extension plate 7, a long slot 14 is provided on the extension plate 7 along its length. A locking pin 15 is installed on the mounting bracket 9. The locking pin 15 has inclined surfaces 19 on both the upper and lower sides near the end of the long slot 14, and each inclined surface 19 is provided with protruding teeth 16. A toothed groove 17 is provided in the long slot 14 to cooperate with the protruding teeth 16. The toothed groove 17 is arranged along the length of the long slot 14. When the protruding teeth 16 enter the toothed groove 17 and cooperate, the locking pin 15 can be locked in the length of the extension plate 7 due to the limiting effect of the toothed groove 17. As long as the protruding teeth 16 on the locking pin 15 do not separate from the toothed groove 17, the sliding frames 12 on both sides can be fixed on the extension plate 7, ensuring that they will not slide relative to the extension plate 7 under the action of gravity when the circuit breaker equipment is repeatedly rotated.

[0021] To ensure that the protruding teeth 16 on the locking pin 15 can engage in the toothed groove 17 without separating, a clamping screw 18 is also installed on the baffle tube 11. Rotating the clamping screw 18 can move the mounting bracket 9 and the locking pin 15 on the equipment closer to the extension plate 7. When the protruding teeth 16 on the locking pin 15 enter the long groove 14 and engage with the toothed groove 17, the sliding brackets 12 on both sides are locked in the length direction of the extension plate 7.

[0022] When using the handcart-type circuit breaker turning device described in this invention, move the entire device to the location to be inspected, remove the mounting bracket 9 and install it on both sides of the circuit breaker device, adjust the position of the sliding brackets 12 on both sides on the extension plate 7 so that the mounting rod 8 is arranged correspondingly to the mounting bracket 9, push the device to move so that the mounting rod 8 is inserted into the mounting bracket 9, and install the stop tube 11 at the end of the mounting rod 8 that extends out of the mounting bracket 9 to form an installation enclosure for the circuit breaker device.

[0023] Then, the clamping screw 18 on the baffle 11 is rotated to position and clamp the circuit breaker equipment towards the flipping disc 6. During the clamping process, the locking pin 15 of the mounting bracket 9 on the equipment moves the sliding bracket 12 and extends into the toothed groove 17 in the long slot 14 for positioning. Through the mutual limiting of the convex tooth 16 and the toothed groove 17, the locking pin 15 is locked on the extension plate 7, that is, the mounting rod 8 and the sliding bracket 12 are simultaneously locked on the extension plate 7. When the equipment is flipped later, the cooperating convex tooth 16 and toothed groove 17 can also support the weight of the equipment itself, preventing the sliding bracket 12 from moving relative to the extension plate 7. This ensures that the position of the mounting rod 8 on both sides of the sliding bracket 12 remains relatively unchanged. When the circuit breaker equipment is repeatedly flipped, the position of the circuit breaker equipment itself will not move, ensuring the accurate positioning of the equipment during the flipping process. This avoids the inability to carry out subsequent installation and commissioning work smoothly due to installation position deviation, greatly improving the reliability and success rate of maintenance work, and ensuring the stable operation of the circuit breaker and even the entire power system.

[0024] Furthermore, the length of the walking rod 2 is greater than the height of the push frame 20, in order to reduce the storage space of the entire device when it is not in use, such as... Figure 11 As shown, a rotatable auxiliary bracket 21 is hinged to the upper end of the push frame 20. A pin 22 is provided on the auxiliary bracket 21. The push frame 20 has a first insertion hole 23 and a second insertion hole 24 that cooperate with the pin 22. When the pin 22 is located in the first insertion hole 23, the auxiliary bracket 21 is superimposed on the push frame 20. When the pin 22 is located in the second insertion hole 24, the auxiliary bracket 21 is tilted and located on the side away from the lifting seat 5.

[0025] The inner side of the walking rod 2 is equipped with a lifting gripping rod 26 via a torsion spring 25. The torsion spring 25 always tends to push the lifting gripping rod 26 to rotate closer to the walking rod 2. When the auxiliary support 21 is superimposed on the push frame 20, grasping the lifting gripping rod 26 upwards can position the push frame 20 at the bottom of the overall device.

[0026] When the device needs to be stored, first rotate the auxiliary bracket 21 to align it with the push frame 20, and then insert the pin 22 into the first socket 23 to lock it in place. The position of the auxiliary bracket 21 at this point will not interfere with the contact between the push frame 20 and the ground. Then, the operator can pull the lifting lever 26 with both hands to overcome the spring force of the torsion spring 25 and rotate it to a position perpendicular to the walking rod 2. Using the caster wheel 4 as the center of rotation, the entire device can be flipped so that the push frame 20 is in contact with the ground at the bottom of the device, effectively reducing its storage volume.

[0027] When the device needs to move and the front wheels 3 need to cross low obstacles, the auxiliary bracket 21 can be rotated to an inclined position relative to the push frame 20, and the pin 22 can be inserted into the second socket 24 for locking. Figure 13 As shown, after the auxiliary support 21 is locked, its relatively tilted position makes it easier for the staff to press down and lift the front end of the walking rod 2, so as to ensure that the device can be moved to the designated maintenance position.

[0028] Furthermore, after the device is moved to the maintenance position, its movement can be locked, such as... Figure 12 As shown, a lifting nut 27 is installed on the inner side of the walking rod 2 near the walking wheel 3. A lifting screw 28 is installed inside the lifting nut 27. A positioning rubber base 29 is installed at the end of the lifting screw 28 that extends downward through the lifting nut 27.

[0029] When the device is in motion, the positioning rubber base 29 maintains sufficient clearance from the ground to prevent interference with its normal movement. When the device is in position and the movement of the wheels 3 is no longer required, the operator can rotate the lifting screw 28 to lower the positioning rubber base 29 to contact the ground and lift the wheels 3 off the ground. The friction between the positioning rubber base 29 and the ground allows for relative locking of the device.

[0030] Furthermore, in order to achieve vertical lifting and lowering movement of the lifting seat 5 relative to the frame 1, and to ensure that it can be adapted to circuit breaker settings at different installation heights, such as... Figure 15 As shown, a first motor 30 is mounted on the frame 1, and a lead screw 31 is connected to the output shaft of the first motor 30. The lead screw 31 is mounted on the frame 1 through a bearing seat. A nut 32 is fitted onto the lead screw 31, and the nut 32 can move along the length of the lead screw 31 when the lead screw 31 rotates. First scissor lifts 33 are provided on both sides of the nut 32, and a second scissor lift 34 is hinged to each first scissor lift 33. One end of the first scissor lift 33 is hinged to the bottom of the lifting seat 5, and the other end of the first scissor lift 33 is fitted with a first grooved wheel 35. A first guide rod 36 that mates with the first grooved wheel 35 is mounted on the frame 1. One end of the second scissor lift 34 is hinged to the frame 1, and the other end of the second scissor lift 34 is fitted with a second grooved wheel 37. A second guide rod 38 that mates with the second grooved wheel 37 is mounted on the bottom of the lifting seat 5. When the first motor 30 is started, it can drive the lifting seat 5 to move vertically relative to the frame 1.

[0031] The grooved wheel and guide rod provide necessary guidance. The first motor 30 is installed on the frame 1. Through the lifting device composed of the lead screw 31, lead screw nut 32 and scissor fork, the lifting seat 5 can be moved vertically relative to the frame 1. This allows the height of the equipment mounting mechanism to be flexibly adjusted according to the height requirements of different equipment, thereby enhancing the versatility and adaptability of the tilting device.

[0032] Furthermore, in order to achieve the rotational drive of the flip disk 6, such as Figure 16 As shown, a second motor 39 is installed inside the lifting seat 5, and a drive gear 40 is provided on the output shaft of the second motor 39. A slewing bearing 41 is installed between the lifting seat 5 and the tilting plate 6, wherein the inner ring of the slewing bearing 41 is fixed on the lifting seat 5. Corresponding to the position of the inner ring, a reinforcing rib plate seat 42 is also provided inside the lifting seat 5 to improve the connection strength of the slewing bearing on the lifting seat 5, as well as the load-bearing capacity after the equipment is mounted.

[0033] The outer ring of the slewing bearing 41 is provided with a gear ring 43 that meshes with the drive gear 40. The tilting disc 6 is fixedly mounted on the outer ring of the slewing bearing 41. When the second motor 39 is started, it can drive the tilting disc 6 and the equipment mounting mechanism to rotate through the cooperating drive gear 40 and gear ring 43. The above structure realizes the horizontal angle adjustment of the circuit breaker equipment after mounting, further meeting the diverse needs of tilting angle during the maintenance and installation of different equipment.

[0034] Furthermore, in order to adapt the retaining pipe 11 to different positions on the mounting rod 8 to form the necessary enclosure according to the size and type of the circuit breaker equipment to be mounted, such as... Figure 17 As shown, a first mounting bracket 44 is installed at the end of the mounting rod 8 away from the flip plate 6. The first mounting bracket 44 contains a screw 45, and the end of the mounting rod 8 has several insertion holes 46 that mate with the screw 45. A second mounting bracket 47 that mates with the baffle tube 11 is installed on the first mounting bracket 44. The second mounting bracket 47 has a locking bolt 48 that can press down and limit the baffle tube 11. By selecting different insertion holes 46 for positioning and installation of the screw 45, the mounting brackets can be positioned at different locations on the mounting rod 8. By rotating the locking bolt 48, the baffle tube 11 can be locked in the second mounting brackets 47 on both sides, achieving the positioning and installation of the baffle tube 11 on the mounting rods 8 on both sides, forming a positioning enclosure for the circuit breaker equipment. The above structure not only enables the positioning and mounting of different types of circuit breaker equipment but also facilitates disassembly and assembly by workers, improving the efficiency of equipment disassembly, assembly, and maintenance.

[0035] To prevent scratches or collision damage between the screw and the equipment surface when the screw is rotated to clamp and position the equipment, a rubber pad 49 is installed at one end of the screw 18 that protrudes from the baffle tube 11. The rubber pad 49 provides protection and cushioning to a certain extent.

[0036] To facilitate the rotation of the clamping screw 18 and improve the operating efficiency of the equipment, a handwheel 51 is installed at the end of the clamping screw 18 away from the rubber pressure pad 49. When clamping and positioning the equipment, simply rotate the handwheel 51 manually to quickly clamp and position the equipment.

[0037] Furthermore, in order to allow the locking pin 15 on the mounting bracket 9 to move axially away from the toothed groove 17 after the circuit breaker equipment is installed and removed from the equipment mounting mechanism, a return spring 50 is installed at the end of the mounting bracket 9 near the sliding frame 12. When the protruding tooth 16 on the locking pin 15 enters the elongated groove 14 and engages with the toothed groove 17, the return spring 50 is in a compressed state. After the circuit breaker equipment is removed, the clamping screw 18 no longer limits the length of the locking pin 15. Under the pushing force of the return spring 50, the locking pin 15 on the mounting bracket 9 can move away from the position of the elongated groove 14 in the extension plate 7, facilitating the disassembly and assembly of the device.

[0038] The device described in this invention features precise positioning, ensuring the circuit breaker remains stable during repeated flipping, significantly improving the reliability and success rate of maintenance work and effectively guaranteeing the stable operation of the circuit breaker and power system. The flexibly adjustable lifting seat 5 and flipping plate 6 can adapt to different height and angle requirements, enhancing the versatility and adaptability of the handcart-type circuit breaker flipping device and meeting diverse maintenance scenarios. The convenient storage and mobility design saves space and facilitates transfer between different locations, improving work efficiency. The detachable equipment mounting mechanism and retainer positioning design allow for quick mounting of different types of circuit breakers and easy disassembly, greatly improving the efficiency of equipment disassembly and maintenance. Furthermore, detailed designs such as rubber pressure pads provide protection for the equipment, ensuring the smooth progress of maintenance work in all aspects.

[0039] Furthermore, the invention features a compact overall structure and a reasonable layout of components. While meeting various functional requirements such as equipment flipping, mounting, height and angle adjustment, it minimizes space occupation. The connections and cooperation between the components are clear, facilitating installation, disassembly and maintenance, reducing equipment maintenance costs and management difficulty, and promoting its widespread application in power systems.

[0040] The technical solutions of this invention are not limited to the embodiments described herein. All technical contents not described in detail herein are well-known technologies.

Claims

1. A handcart-type circuit breaker tipping device, characterized in that: The device includes a frame (1), with outwardly extending travel rods (2) installed at both ends of the frame (1). Each travel rod (2) has a travel wheel (3) installed at the end furthest from the frame (1). Universal casters (4) are installed at the bottom of the frame (1) corresponding to the travel wheels (3). A vertically arranged push frame (20) is installed on one side of the frame (1). A vertically movable lifting seat (5) is installed on the frame (1). A rotatable tilting disc (6) is provided at the end of the lifting seat (5) furthest from the push frame (20). The axis of the tilting disc (6) is parallel to the length direction of the travel rods (2). Extension plates (7) are installed on both sides of the tilting disc (6). A detachable equipment mounting mechanism is installed between the extension plates (7) on both sides. The mounting mechanism includes two hanging rods (8) arranged side by side. Each hanging rod (8) is fitted with a hanging sleeve (9). The hanging sleeve (9) is provided with connecting bolts (10) that mate with the screw holes on the equipment. One end of each hanging rod (8) that extends out of the hanging sleeve (9) is provided with a detachable stop tube (11). The stop tube (11) is arranged perpendicular to the hanging rod (8). The end of the hanging rod (8) near the extension plate (7) is provided with a matching sliding frame (12). Two sets of clamping guide wheels (13) are installed side by side in the sliding frame (12). The extension plate (7) is located between the two sets of clamping guide wheels (13). A long groove (14) is opened on the extension plate (7) along the length direction. The sliding frame (12) is provided with a groove (14) that matches the long groove (14). The mounting bracket (9) is equipped with a locking pin (15) and the locking pin (15) has inclined surfaces (19) on the upper and lower sides near the end of the long groove (14). Each inclined surface (19) has a tooth (16) arranged on it. The long groove (14) has a tooth groove (17) that matches the tooth (16). The tooth groove (17) is arranged along the length of the long groove (14). The stop tube (11) is also equipped with a clamping screw (18). Rotating the clamping screw (18) can move the mounting bracket (9) and the locking pin (15) on the equipment closer to the extension plate (7). When the tooth (16) on the locking pin (15) enters the long groove (14) and matches the tooth groove (17), the sliding brackets (12) on both sides are locked in the length direction of the extension plate (7).

2. The handcart-type circuit breaker switching device according to claim 1, characterized in that: The length of the walking rod (2) is greater than the height of the push frame (20). A rotatable auxiliary bracket (21) is hinged to the upper end of the push frame (20). A pin (22) is provided on the auxiliary bracket (21). The push frame (20) has a first insertion hole (23) and a second insertion hole (24) that cooperate with the pin (22). When the pin (22) is located in the first insertion hole (23), the auxiliary bracket (21) coincides with the push frame (20). When located in the second socket (24), the auxiliary bracket (21) is tilted on the side away from the lifting seat (5). The inner side of the walking rod (2) is equipped with a lifting grab bar (26) by a torsion spring (25). The torsion spring (25) always tends to push the lifting grab bar (26) to rotate closer to the walking rod (2). When the auxiliary bracket (21) coincides with the push frame (20), grasping the lifting grab bar (26) upwards can make the push frame (20) located at the bottom of the overall device.

3. The handcart-type circuit breaker switching device according to claim 1, characterized in that: A lifting nut (27) is installed on the inner side of the walking rod (2) near the walking wheel (3). A lifting screw (28) is installed inside the lifting nut (27). A positioning rubber base (29) is installed at the end of the lifting screw (28) that extends downward through the lifting nut (27).

4. The handcart-type circuit breaker switching device according to claim 1, characterized in that: A first motor (30) is installed on the frame (1). A lead screw (31) is connected to the output shaft of the first motor (30). A lead screw nut (32) is installed on the lead screw (31). A first scissor bar (33) is provided on both sides of the lead screw nut (32). A second scissor bar (34) is hinged on each of the first scissor bars (33). One end of the first scissor bar (33) is hinged to the bottom of the lifting seat (5). A first grooved wheel (35) is installed on the other end of the first scissor bar (33). A first guide rod (36) that cooperates with the first grooved wheel (35) is installed on the frame (1). One end of the second scissor bar (34) is hinged to the frame (1). A second grooved wheel (37) is installed on the other end of the second scissor bar (34). A second guide rod (38) that cooperates with the second grooved wheel (37) is installed at the bottom of the lifting seat (5). When the first motor (30) is started, it can drive the lifting seat (5) to move vertically relative to the frame (1).

5. The handcart-type circuit breaker switching device according to claim 1, characterized in that: The lifting seat (5) is equipped with a second motor (39), and the output shaft of the second motor (39) is provided with a drive gear (40). A slewing bearing (41) is installed between the lifting seat (5) and the tilting disc (6). The inner ring of the slewing bearing (41) is fixed on the lifting seat (5). Corresponding to the position of the inner ring, a reinforcing rib plate seat (42) is also provided in the lifting seat (5). The outer ring of the slewing bearing (41) is provided with a gear ring (43) that meshes with the drive gear (40). The tilting disc (6) is fixedly installed on the outer ring of the slewing bearing (41). When the second motor (39) is started, it can drive the tilting disc (6) and the equipment mounting mechanism to rotate.

6. The handcart-type circuit breaker switching device according to claim 1, characterized in that: The end of the hanging rod (8) away from the flip plate (6) is fitted with a first card seat (44). The first card seat (44) is provided with a plug screw (45). The end of the hanging rod (8) is provided with several insertion holes (46) that cooperate with the plug screw (45). A second card seat (47) that cooperates with the stop tube (11) is installed on the first card seat (44). The second card seat (47) is provided with a locking bolt (48) that can press down and limit the stop tube (11). A rubber pressure pad (49) is installed at the end of the clamping screw (18) that goes out of the stop tube (11). A handwheel (51) is installed at the end of the clamping screw (18) away from the rubber pressure pad (49).

7. The handcart-type circuit breaker switching device according to claim 1, characterized in that: A return spring (50) is installed at one end of the mounting bracket (9) near the sliding frame (12). When the protruding tooth (16) on the locking pin (15) enters the long groove (14) and cooperates with the tooth groove (17), the return spring (50) is in a compressed state.

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