Equipment for preventing 35kV PT handcart from toppling

Abstract

The invention relates to the technical field of switch cabinet handcart maintenance, in particular to a set of equipment for preventing a 35kV PT handcart from toppling over. Comprising handcart guide rails, walking wheels at the bottom of the PT handcart, a speed measurement mechanism, an unbalanced force application mechanism and a control device. Wherein the speed measuring mechanism is used for detecting the moving speed of the PT handcart on the handcart guide rail; the unbalanced force application mechanism is used for applying resistance to a front walking wheel and a rear walking wheel of the PT handcart when the moving speed of the PT handcart on the inclined guide rail is increased; and the control device is used for controlling the unbalanced force application mechanism and sending out alarm information through the alarm module when the moving speed of the PT handcart on the horizontal guide rail is reduced. According to the invention, speed limit adjustment can be carried out or alarm information can be sent out according to the real-time speed change of the PT handcart, and the practicability is high.

Description

Technical Field

[0001] The present application relates to the technical field of switch cabinet trolley maintenance, and in particular to a set of equipment for preventing a 35kVPT trolley from tipping over. Background Art

[0002] The statements in this section merely provide background technical information related to the present application and do not necessarily constitute prior art.

[0003] The structure of the 35kV PT trolley currently used in the station is basically similar. Its three-phase PT is installed behind the front panel of the PT trolley. The center of gravity of the trolley is high and forward. The matching external cabinet rail has a certain slope. There is a risk of tipping when the trolley is pulled out. To address this problem, the current measures are to post a "two-person operation, prevent tipping" eye-catching sign in front of the switch cabinet door and standardize the operation of on-site personnel; Obviously, the risk of tipping still exists. The tipping of the trolley is mainly due to its high and forward center of gravity. When moving on the horizontal part of the rail, if the vehicle speed decreases, it is easy to tip over with its high and forward center of gravity; when moving on the inclined part of the rail, the main reason is that the trolley tilts downward, and its own gravity along the rail direction drives the trolley to slide down, causing the vehicle speed to be too fast. At the same time, its weight perpendicular to the rail direction reduces the friction between the trolley and the rail, resulting in tipping.

[0004] In view of this, it is necessary to provide a set of equipment to prevent the 35kVPT trolley from tipping over to solve the above technical problems. Summary of the invention

[0005] Based on this, in order to solve the above technical problems, the present application provides a set of equipment to prevent the 35kVPT trolley from tipping over.

[0006] The technical solution adopted by this application to solve the problems existing in the prior art is:

[0007] This application proposes a set of equipment to prevent the 35kVPT trolley from tipping over, including:

[0008] A trolley guide rail, which is connected to the switch cabinet body; the trolley guide rail comprises a horizontal guide rail, an inclined guide rail and a transition section which are connected in sequence;

[0009] Traveling wheels: The PT trolley moves on the trolley guide wheels through the traveling wheels at the bottom, and the traveling wheels include front traveling wheels and rear traveling wheels;

[0010] Also includes:

[0011] The speed measuring mechanism is installed on the horizontal guide rail and the inclined guide rail to detect the moving speed of the PT trolley on the trolley guide rail;

[0012] An unbalanced force-applying mechanism is provided on the inclined guide rail, and is used to apply resistance to the front and rear running wheels of the PT trolley when the moving speed of the PT trolley on the inclined guide rail increases, wherein the resistance applied by the unbalanced force-applying mechanism to the front running wheel is less than the resistance applied to the rear running wheel;

[0013] The control device is used to control the unbalanced force application mechanism and send out an alarm message through the alarm module when the moving speed of the PT trolley on the horizontal guide rail decreases.

[0014] Preferably, the front and rear travel wheels each include a small guide wheel and a large guide wheel, and the small guide wheel and the large guide wheel are both rotatably mounted on the connecting shaft; support parts are fixedly provided on both sides of the large guide wheel, and the support parts are fixedly connected to the PT trolley;

[0015] The inclined guide rail includes an inclined rail surface in the middle and inclined outer walls on both sides, and an inclined frame is provided between the inclined outer wall and the inclined rail surface; a connecting shaft inclined channel for passing the connecting shaft is formed in the middle of the inclined frame along the travel direction of the PT trolley; a large guide wheel inclined channel is formed between the inclined frame and the inclined rail surface, and a small guide wheel inclined channel is formed below the inclined rail surface.

[0016] Preferably, the unbalanced force-applying mechanism comprises a lower opening slot provided at the lower part of the tilting frame, a force-applying part is slidably provided in the lower opening slot, and a sliding plate cooperating with the lower opening slot is provided around the force-applying part; a plurality of force-applying springs are provided in the lower opening slot, and two ends of the force-applying springs are respectively fixedly connected with the lower opening slot and the force-applying part;

[0017] A force-applying airbag is provided in the lower opening groove, the force-applying airbag is connected to the electromagnetic valve pipeline outside the trolley guide rail through a first air path, and the electromagnetic valve is connected to the air storage bag pipeline through a second pipeline; the electromagnetic valve is electrically connected to the control device;

[0018] A pressure relief valve is provided on the first gas path.

[0019] Preferably, the plane where the bottom of the force-applying part is located intersects with the plane where the PT trolley running wheels on the inclined guide rail are located, and the angle between the two planes gradually decreases downward along the inclined guide rail.

[0020] Preferably, the horizontal guide rail includes a horizontal rail surface in the middle and horizontal outer walls on both sides, a horizontal frame is provided between the horizontal outer wall and the horizontal rail surface; a connecting shaft horizontal channel for passing the connecting shaft is formed in the middle of the horizontal frame along the travel direction of the PT trolley; a large guide wheel horizontal channel is formed between the horizontal frame and the horizontal rail surface, and a small guide wheel horizontal channel is formed below the horizontal rail surface;

[0021] The horizontal rail surface, the horizontal outer wall, and the horizontal frame are fixedly connected to the inclined rail surface, the inclined outer wall, and the inclined frame respectively;

[0022] The connecting shaft horizontal channel, the large guide wheel horizontal channel, and the small guide wheel horizontal channel are respectively connected to the connecting shaft inclined channel, the large guide wheel inclined channel, and the small guide wheel inclined channel.

[0023] Preferably, the speed measuring mechanism comprises:

[0024] The speed measuring belt channel comprises a speed measuring belt horizontal channel and a speed measuring belt inclined channel; the speed measuring belt horizontal channel is arranged between the horizontal frame and the horizontal outer wall; the speed measuring belt inclined channel is arranged between the inclined frame and the inclined outer wall; the speed measuring belt inclined channel is connected with the speed measuring belt horizontal channel;

[0025] The guide roller group includes a first rotating roller, a second rotating roller and a plurality of steering rollers; the first rotating roller is fixedly arranged at the front end of the horizontal guide rail; the second rotating roller is fixedly arranged at the end of the inclined guide rail; the steering roller is fixedly arranged at the connection between the horizontal guide rail and the inclined guide rail;

[0026] The speed measuring belt is arranged in the speed measuring belt channel; the two ends of the speed measuring belt are respectively sleeved outside the first rotating roller and the second rotating roller; the steering roller is arranged below the speed measuring belt, and is used to make the horizontal direction of the speed measuring belt parallel to the horizontal guide rail, and the inclined direction is the same as the inclined direction of the inclined guide rail;

[0027] A speed sensor is arranged on the rotating shaft of the first rotating roller and is used to measure the angular velocity of the rotating shaft of the first rotating roller; the speed sensor is fixedly arranged on the outer cover, and the outer cover is fixedly arranged on the horizontal outer wall;

[0028] The speed measuring part is fixed above the speed measuring belt. When the PT trolley moves, it drives the speed measuring part to move, thereby rotating the speed measuring belt. The speed measuring belt drives the first rotating roller to rotate to achieve speed measurement.

[0029] Preferably, one end of the rotating shaft of the first rotating roller is fixedly connected to the mounting plate, and the safety plate is fixedly mounted on the horizontal frame; the other end is externally rotatably sleeved with a rotating ring, the rotating ring is rotatably sleeved in the mounting ring, and the mounting ring is arranged in a speed measuring hole opened on the horizontal outer wall; the mounting ring is fixedly connected to the horizontal outer wall;

[0030] The speed measuring end of the speed measuring sensor is fixedly connected to the rotating ring;

[0031] The speed sensor is electrically connected to the control device.

[0032] Preferably, the speed measuring part comprises a connecting seat fixedly mounted on the speed measuring belt, an outer cylinder is fixedly mounted on the connecting seat; an electromagnet is fixedly mounted in one end of the outer cylinder away from the PT trolley, and a fixing block is fixedly mounted in the other end; a through hole is formed in the middle of the electromagnet and the fixing block;

[0033] An iron sliding block is slidably arranged in the outer cylinder, a compression spring is arranged between the sliding block and the electromagnet, a guide rod is passed through the compression spring, one end of the guide rod is fixedly connected to the sliding block, and the other end passes through the electromagnet and is slidably connected to the electromagnet;

[0034] The other end of the sliding block is provided with a speed measuring rod, one end of the speed measuring rod is fixedly connected to the sliding block, and the other end of the speed measuring rod passes through the fixed block and is slidably connected to the fixed block;

[0035] The electromagnet is electrically connected to the control device.

[0036] Preferably, a horizontal speed measuring groove is provided on the horizontal frame along the moving direction of the speed measuring rod; a horizontal guide groove is provided on the horizontal outer wall along the moving direction of the guide rod;

[0037] The inclined frame is provided with an inclined speed measuring groove along the moving direction of the speed measuring rod; the inclined outer wall is provided with an inclined guide groove along the moving direction of the guide rod;

[0038] Preferably, the first rotating roller and the second rotating roller are both ball bearings.

[0039] Compared with the prior art, the beneficial effects of this application are:

[0040] 1. The small guide wheel of the traveling wheel is under the guide rail of the PT trolley when the PT trolley is pulled out, protecting the PT trolley from tipping over.

[0041] 2. The speed of the PT trolley during the pulling process is monitored by the speed measuring mechanism, and the alarm module will give timely reminders when there is a risk of tipping.

[0042] 3. In the inclined guide rail section of the trolley guide rail, an unbalanced force-applying mechanism is used to apply different resistances to the front and rear travel wheels, respectively, to effectively control the gravity acceleration component caused by the tilt of the PT trolley and prevent it from tipping over. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The drawings in the specification, which constitute a part of the present application, are used to provide further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0044] Figure 1 This is a schematic diagram of the overall structure of a set of equipment to prevent the 35kVPT trolley from tipping over in this application.

[0045] Figure 2 This is a schematic diagram of the travel wheel connection structure at the bottom of the PT trolley, a set of equipment for preventing the 35kV PT trolley from tipping over in this application.

[0046] Figure 3 This is a schematic diagram of the overall structure of a set of horizontal guide rails for preventing the 35kVPT trolley from tipping over in this application.

[0047] Figure 4 for Figure 3 A partial enlarged view of area A in the middle.

[0048] Figure 5 for Figure 4 The overall structure diagram after removing the speed measuring mechanism.

[0049] Figure 6 for Figure 5 Schematic diagram of the internal cross-section structure after removing part of the horizontal outer wall.

[0050] Figure 7 This is a schematic diagram of the overall structure of a set of equipment speed measuring belts for preventing the 35kVPT trolley from tipping over in this application.

[0051] Figure 8 This is a schematic diagram of the overall structure of a set of equipment tilting guide rails to prevent the 35kVPT trolley from tipping over in this application.

[0052] Fig. 9 for Figure 8 A partial enlarged view of area B in the middle.

[0053] Fig.10 This is a schematic diagram of the cross-sectional structure of a tilting frame of a device for preventing a 35kVPT trolley from tipping over in this application.

[0054] Fig.11 for Fig.10 Schematic diagram of the cross-sectional structure of the middle tilt frame at another angle.

[0055] Fig.12 This is a schematic diagram of the overall structure of the speed measuring part of a set of equipment for preventing a 35kVPT trolley from tipping over in this application.

[0056] Fig.13 for Fig.12 Schematic diagram of the internal cross-section structure of the middle speed measuring unit.

[0057] Fig.14 This is a schematic diagram of the connection structure of a set of force-applying airbags for preventing a 35kVPT trolley from tipping over.

[0058] In the figure:

[0059] 1. PT trolley, 10. Support part, 11. Small guide wheel, 12. Large guide wheel, 13. Connecting shaft,

[0060] 2. Horizontal guide rail, 20. Horizontal rail surface, 21. Horizontal channel of small guide wheel, 22. Horizontal channel of large guide wheel, 23. Horizontal channel of speed measuring belt, 24. Horizontal frame, 25. Horizontal channel of connecting shaft, 26. Horizontal guide groove, 27. Horizontal speed measuring groove, 28. Horizontal outer wall,

[0061] 3. Inclined guide rail, 30. Inclined rail surface, 31. Inclined channel for small guide wheel, 32. Inclined channel for large guide wheel, 33. Inclined channel for speed measuring belt,

[0062] 34. tilting frame, 340. lower opening slot, 341. force applying part, 342. force applying spring, 343. guide slot, 344. guide strip,

[0063] 35. Inclined channel of connecting shaft, 36. Inclined guide groove, 37. Inclined speed measuring groove, 38. Inclined outer wall,

[0064] 4. Transition section,

[0065] 5. Speed ​​measuring mechanism, 50. Speed ​​measuring hole, 51. Mounting ring, 52. Rotating ring, 53. First rotating roller, 54. Second rotating roller, 55. Steering roller, 56. Speed ​​measuring belt,

[0066] 57. Speed ​​measuring part, 570. Connecting seat, 571. Outer cylinder, 572. Electromagnet, 573. Sliding block, 574. Compression spring, 575. Fixed block, 576. Speed ​​measuring rod, 577. Columnar channel, 578. Guide rod,

[0067] 58. Fixed axis;

[0068] 6. Solenoid valve, 7. Pressure relief valve, 8. Force-applying airbag, 9. Air storage bag, 10. First air path, 11. Second air path. DETAILED DESCRIPTION

[0069] The present application is further described below in conjunction with the accompanying drawings and embodiments.

[0070] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0071] In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present disclosure, and do not specifically refer to any part or element in the present disclosure and should not be understood as limitations on the present disclosure.

[0072] Figure 1The overall structure diagram of a set of equipment for preventing a 35kVPT trolley from tipping over in this application is shown in FIG. The set of equipment for preventing a 35kVPT trolley from tipping over in this application includes:

[0073] A trolley guide rail, which is connected to the switch cabinet body; the trolley guide rail comprises a horizontal guide rail 2, an inclined guide rail 3 and a transition section 4 which are connected in sequence;

[0074] Travel wheels, such as Figure 2 As shown, the PT trolley 1 moves on the trolley guide wheel through the bottom running wheels, and the running wheels include front running wheels and rear running wheels;

[0075] The speed measuring mechanism 5 is provided on the horizontal guide rail 2 and the inclined guide rail 3 and is used to detect the moving speed of the PT trolley 1 on the trolley guide rail;

[0076] An unbalanced force applying mechanism is provided on the inclined guide rail 3, and is used to apply resistance to the front and rear running wheels of the PT trolley 2 when the moving speed of the PT trolley 2 on the inclined guide rail 3 increases, wherein the resistance applied by the unbalanced force applying mechanism to the front running wheel is less than the resistance applied to the rear running wheel;

[0077] The control device is used to control the unbalanced force applying mechanism and send out an alarm message through the alarm module when the moving speed of the PT trolley 1 on the horizontal guide rail 2 decreases.

[0078] refer to Figure 2 The front and rear travel wheels each include a small guide wheel 11 and a large guide wheel 12, and the small guide wheel 11 and the large guide wheel 12 are both rotatably mounted on a connecting shaft 13; support parts 10 are fixedly provided on both sides of the large guide wheel 12, and the support parts 10 are fixedly connected to the PT trolley 2;

[0079] refer to Figure 8 as well as Fig. 9 The inclined guide rail 3 includes an inclined rail surface 30 in the middle and inclined outer walls 38 on both sides, and an inclined frame 34 is provided between the inclined outer wall 38 and the inclined rail surface 30; a connecting shaft inclined channel 35 for passing the connecting shaft 13 is formed in the middle of the inclined frame 34 along the travel direction of the PT trolley 1; a large guide wheel inclined channel 32 is formed between the inclined frame 34 and the inclined rail surface 30, and a small guide wheel inclined channel 31 is formed below the inclined rail surface 30.

[0080] Refer to Fig.10 as well as Fig.11The unbalanced force-applying mechanism comprises a lower opening groove 340 arranged at the lower part of the tilting frame 34, a force-applying part 341 is slidably arranged in the lower opening groove 340, and a slide plate cooperating with the lower opening groove 340 is arranged around the force-applying part 341; a plurality of force-applying springs 342 are arranged in the lower opening groove 340, and the two ends of the force-applying springs 342 are respectively fixedly connected with the lower opening groove 340 and the force-applying part 341; a force-applying airbag 8 is arranged in the lower opening groove 340, and the force-applying airbag 8 is connected with the solenoid valve 6 pipeline outside the trolley guide rail through the first air circuit 10, and the solenoid valve 6 is connected with the air storage bag 9 pipeline through the second pipeline 11; the solenoid valve 6 is electrically connected with the control device; a pressure relief valve 7 is arranged on the first air circuit 10; the plane where the bottom of the force-applying part 341 is located intersects with the plane where the walking wheels of the PT trolley 1 on the tilting guide rail 3 are located, and the angle between the two planes gradually decreases downward along the tilting guide rail 3.

[0081] The most common position for the PT trolley 1 to tip over is when it moves on the inclined guide rail 3. This is because when on the inclined guide rail 3, the weight of the PT trolley 1 itself has a gravity component in the direction of the inclined guide rail 3, which causes the PT trolley 1 to have an acceleration when moving downward, and the speed is increased too quickly, causing the PT trolley to tip over. Therefore, a common technical means in the prior art to prevent the PT trolley 1 from tipping over on the inclined guide rail 3 is to limit its moving speed. However, when the PT trolley 1 moves too fast, a reaction force is applied to the front of the PT trolley 1 to limit its moving speed. If the reaction force acts on its front running wheel, the PT trolley 1 is more likely to tip over; if the reaction force is applied to the rear running wheel, then even if the reaction force is large, at most the PT trolley 1 will stop instead of tipping over, because at this time the PT trolley 1 is on the inclined guide rail 3 and is tilted itself.

[0082] It should be noted that, in the present application, the front running wheels of the PT trolley 1 refer to the frontmost set of running wheels in the direction of pulling the PT trolley 1 out of the switch cabinet, that is, a set of running wheels located outside the switch cabinet.

[0083] The unbalanced force applying mechanism in this application is set based on the above reasons. Fig.10 and Fig.11 When the control device controls the solenoid valve 6 to open, the gas in the air storage bag 9 enters the force-applying air bag 8, and the force-applying air bag 8 squeezes the force-applying part 341, so that the force-applying part 341 squeezes the front and rear running wheels. Since the plane where the bottom of the force-applying part 341 is located intersects with the plane where the running wheels of the PT trolley 1 on the inclined guide rail 3 are located, the angle between the two planes gradually decreases downward along the inclined guide rail 3, so the resistance of the rear running wheel is greater than that of the front running wheel, thereby limiting the speed of the PT trolley 1 and preventing it from tipping over.

[0084] refer to Figure 3, Figure 4 , Figure 5 and Figure 6 The horizontal guide rail 2 includes a horizontal rail surface 20 in the middle and horizontal outer walls 28 on both sides, and a horizontal frame 24 is arranged between the horizontal outer wall 28 and the horizontal rail surface 20; a connecting shaft horizontal channel 25 for passing the connecting shaft 13 is formed in the middle of the horizontal frame 24 along the traveling direction of the PT trolley 1; a large guide wheel horizontal channel 22 is formed between the horizontal frame 24 and the horizontal rail surface 20, and a small guide wheel horizontal channel 21 is formed below the horizontal rail surface 20; the horizontal rail surface 20, the horizontal outer wall 28, and the horizontal frame 24 are fixedly connected with the inclined rail surface 30, the inclined outer wall 38, and the inclined frame 34 respectively; the connecting shaft horizontal channel 25, the large guide wheel horizontal channel 22, and the small guide wheel horizontal channel 21 are connected with the connecting shaft inclined channel 35, the large guide wheel inclined channel 32, and the small guide wheel inclined channel 31 respectively.

[0085] Also refer to Figure 7 , the speed measuring mechanism 5 comprises:

[0086] The speed measuring belt channel includes a speed measuring belt horizontal channel 23 and a speed measuring belt inclined channel 33; the speed measuring belt horizontal channel 23 is arranged between the horizontal frame 24 and the horizontal outer wall 28; the speed measuring belt inclined channel 33 is arranged between the inclined frame 34 and the inclined outer wall 38; the speed measuring belt inclined channel 33 is connected to the speed measuring belt horizontal channel 23;

[0087] The guide roller group includes a first rotating roller 53, a second rotating roller 54 and a plurality of steering rollers 55; the first rotating roller 53 is fixedly arranged at the front end of the horizontal guide rail 2; the second rotating roller 54 is fixedly arranged at the end of the inclined guide rail 3; the steering roller 55 is fixedly arranged at the connection between the horizontal guide rail 2 and the inclined guide rail 3;

[0088] The speed measuring belt 56 is arranged in the speed measuring belt channel; the two ends of the speed measuring belt are respectively sleeved outside the first rotating roller 53 and the second rotating roller 54; the steering roller 55 is arranged below the speed measuring belt 56, and is used to make the speed measuring belt 56 parallel to the horizontal guide rail 2 in horizontal direction and the inclined direction is the same as the inclined direction of the inclined guide rail 3;

[0089] A speed sensor is provided on the rotation axis of the first rotating roller 53 to measure the angular velocity of the rotation axis of the first rotating roller 53; the speed sensor is fixed on the outer cover, and the outer cover is fixed on the horizontal outer wall 28;

[0090] The speed measuring part 57 is fixedly arranged above the speed measuring belt 56. When the PT trolley 1 moves, the speed measuring part 57 is driven to move, so that the speed measuring belt 56 rotates, and the speed measuring belt 56 drives the first rotating roller 53 to rotate to achieve speed measurement.

[0091] refer to Figure 5 and Figure 6In some embodiments, one end of the rotating shaft of the first rotating roller 53 is fixedly connected to the mounting plate, and the safety plate is fixedly mounted on the horizontal frame 24; the other end is externally rotatably sleeved with a rotating ring 52, and the rotating ring 52 is rotatably sleeved in the mounting ring 51, and the mounting ring 51 is disposed in a speed measuring hole 50 opened on the horizontal outer wall 28; the mounting ring 51 is fixedly connected to the horizontal outer wall 28; the speed measuring end of the speed sensor is fixedly connected to the rotating ring 52; and the speed sensor is electrically connected to the control device.

[0092] refer to Fig.12 and Fig.13 The speed measuring part 57 includes a connecting seat 570 fixedly arranged on the speed measuring belt 56, and an outer cylinder 571 is fixedly arranged on the connecting seat 570; an electromagnet 572 is fixedly arranged in one end of the outer cylinder 571 away from the PT trolley 1, and a fixed block 575 is fixedly arranged in the other end; through holes are opened in the middle of the electromagnet 572 and the fixed block 575; an iron sliding block 573 is slidably arranged in the outer cylinder 571, a compression spring 574 is arranged between the sliding block 573 and the electromagnet 572, and a guide rod 578 is penetrated in the compression spring 574, one end of the guide rod 578 is fixedly connected to the sliding block 573, and the other end passes through the electromagnet 572 and is slidably connected to the electromagnet 572; a speed measuring rod 576 is arranged at the other end of the sliding block 573, one end of the speed measuring rod 576 is fixedly connected to the sliding block 573, and the other end passes through the fixed block 575 and is slidably connected to the fixed block 575; the electromagnet 572 is electrically connected to the control device.

[0093] Also refer to Figure 4 and Fig. 9 The horizontal frame 24 is provided with a horizontal speed measuring groove 27 along the moving direction of the speed measuring rod 576; the horizontal outer wall 28 is provided with a horizontal guide groove 26 along the moving direction of the guide rod 578; the inclined frame 24 is provided with an inclined speed measuring groove 37 along the moving direction of the speed measuring rod 576; the inclined outer wall 38 is provided with an inclined guide groove 36 along the moving direction of the guide rod 578;

[0094] In some embodiments, both the first rotating roller 53 and the second rotating roller 54 are ball bearings.

[0095] Working steps:

[0096] When the PT trolley 1 is pulled out from the switch cabinet:

[0097] refer to Fig.13 , the control device controls the electromagnet 572 to be energized, the guide rod 578 protrudes from the inclined guide groove 36 or the horizontal guide groove 26, and the guide rod 578 is manually moved to the switch cabinet exit of the PT trolley 1;

[0098] The control device controls the electromagnet 572 to be powered off, and the speed measuring rod 576 extends into the horizontal speed measuring slot 27;

[0099] Manually pull the PT trolley 1;

[0100] When on the horizontal guide rail 2, the speed measuring rod 576 moves with the movement of the PT trolley 1, and the speed measuring belt 56 moves together, so as to realize the real-time speed measurement of the PT trolley 1 during the movement; when the speed of the PT trolley 1 on the horizontal guide rail 2 decreases, the control device controls the alarm module to emit an alarm prompt sound, prompting the staff to speed up the PT trolley 1 to prevent tipping;

[0101] When the PT trolley 1 enters the inclined guide rail 3 from the horizontal guide rail 2, the control device will not limit the speed of the PT trolley 1, that is, it will not apply resistance to the front running wheel through the unbalanced force mechanism. This is because if the front running wheel is limited in speed at the front at this time, it is easy to cause the PT trolley 1 to tip over. During this process, the speed measuring mechanism 5 measures the moving speed of the PT trolley 1 in real time. When the moving speed of the PT trolley decreases, the control device controls the alarm module to emit an alarm prompt sound to remind the staff to speed up the PT trolley 1 to prevent tipping. This is because on the one hand, the front wheel of the PT trolley has entered the inclined guide rail 3, and the PT trolley 1 is already in a tilted state as a whole, and it is impossible to slow down. On the other hand, since the rear running wheel is still on the horizontal guide rail 2, the tilt degree of the PT trolley 1 is not high. If it slows down suddenly, due to its high and forward center of gravity, the PT trolley 1 will still be in danger of tipping over.

[0102] When on the inclined guide rail 3, that is, when both the front and rear wheels are on the inclined guide rail 3, the control device controls the solenoid valve 6 to open for a period of time, and the gas in the air storage bag 9 enters the force-applying air bag 8. The force-applying air bag 8 squeezes the force-applying part 341, so that the force-applying part 341 squeezes the front and rear wheels. Since the plane where the bottom of the force-applying part 341 is located intersects with the plane where the PT trolley 1 wheels on the inclined guide rail 3 are located, the angle between the two planes gradually decreases downward along the inclined guide rail 3, so the rear wheel is subject to greater resistance than the front wheel, thereby limiting the speed of the PT trolley 1 and preventing it from tipping over. It should be noted that by controlling the opening time of the solenoid valve 6 through the control device, the degree of squeezing of the front and rear running wheels by the force-applying part 341 can be controlled. These are related to the size and specifications of each component. In practice, technicians can adjust them according to actual conditions. In addition, regarding the air bag 9, pressurized gas is provided in the air bag 9 and a pressure gauge is installed. When the pressure is insufficient, pressurization can be applied. In some embodiments, the air bag 9 is an air tank. This is a common technical means used by technicians in this field and will not be repeated here.

[0103] In the present application, the alarm module is arranged in the control device, and the control device can be arranged near the guide rail of the trolley.

[0104] When the PT trolley 1 is about to be pushed out from the inclined guide rail 3, the control device controls the electromagnet 572 to be energized, and the speed measuring rod 576 is withdrawn from the horizontal speed measuring groove 27;

[0105] When the PT trolley 1 is pushed out from the trolley rail, refer to Fig.14 , the pressure relief valve 7 is opened manually, the gas in the force-applying airbag 7 is discharged, and the force-applying part 341 is reset.

[0106] When the PT trolley 1 is pushed into the switch cabinet:

[0107] The control device controls the electromagnet 572 to be energized, the guide rod 578 protrudes from the inclined guide slot 36 or the horizontal guide slot 26, and the speed measuring rod 576 is withdrawn from the horizontal speed measuring slot 27; the PT trolley 1 is manually pushed into the switch cabinet.

[0108] The present application discloses a set of equipment for preventing a 35kV PT trolley from tipping over. The running wheels of the PT trolley 1 are arranged in the form of a large guide wheel 12 and a small guide wheel 11. The small guide wheel 11 is located below the trolley guide rail during the process of pulling out the PT trolley 1, thereby protecting the PT trolley from tipping over. At the same time, the speed of the PT trolley 1 during the pulling out process is monitored by a speed measuring mechanism 5, and an alarm module can give a timely reminder when there is a risk of tipping over. An unbalanced force-applying mechanism is used in the inclined guide rail 3 sections of the trolley guide rail to apply different resistances to the front running wheels and the rear running wheels, respectively, thereby effectively controlling the gravity acceleration component caused by the tilt of the PT trolley 1 and preventing it from tipping over. The structure is simple and the practicability is strong.

[0109] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0110] Although the above describes the specific implementation methods of the present application in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present application. Technical personnel in the relevant field should understand that on the basis of the technical solution of the present application, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the present application.

Claims

1. A set of equipment to prevent the 35kVPT trolley from tipping over, including: A trolley guide rail, the trolley guide rail is connected to the switch cabinet body; the trolley guide rail comprises a horizontal guide rail (2), an inclined guide rail (3) and a transition section (4) which are connected in sequence; Traveling wheels, the PT trolley (1) moves on the trolley guide wheels via the traveling wheels at the bottom, the traveling wheels comprising a front traveling wheel and a rear traveling wheel; It is characterized by further comprising: A speed measuring mechanism (5) is provided on the horizontal guide rail (2) and the inclined guide rail (3) and is used to detect the moving speed of the PT trolley (1) on the trolley guide rail; An unbalanced force applying mechanism is arranged on the inclined guide rail (3) and is used to apply resistance to the front and rear running wheels of the PT trolley (2) when the moving speed of the PT trolley (2) on the inclined guide rail (3) increases, wherein the resistance applied by the unbalanced force applying mechanism to the front running wheel is smaller than the resistance applied to the rear running wheel; The control device is used for controlling the unbalanced force application mechanism and sending an alarm message through an alarm module when the moving speed of the PT trolley (1) on the horizontal guide rail (2) decreases.

2. The device for preventing a 35kVPT trolley from tipping over according to claim 1 is characterized in that: The front running wheel and the rear running wheel both comprise a small guide wheel (11) and a large guide wheel (12), and the small guide wheel (11) and the large guide wheel (12) are both rotatably mounted on a connecting shaft (13); support parts (10) are fixedly provided on both sides of the large guide wheel (12), and the support parts (10) are fixedly connected to the PT trolley (2); The inclined guide rail (3) comprises an inclined rail surface (30) in the middle and inclined outer walls (38) on both sides; an inclined frame (34) is provided between the inclined outer wall (38) and the inclined rail surface (30); a connecting shaft inclined channel (35) for passing the connecting shaft (13) is formed in the middle of the inclined frame (34) along the travel direction of the PT trolley (1); a large guide wheel inclined channel (32) is formed between the inclined frame (34) and the inclined rail surface (30); and a small guide wheel inclined channel (31) is formed below the inclined rail surface (30).

3. The device for preventing a 35kVPT trolley from tipping over according to claim 2 is characterized in that: The unbalanced force applying mechanism comprises a lower opening groove (340) arranged at the lower part of the tilting frame (34); a force applying part (341) is slidably arranged in the lower opening groove (340); a sliding plate cooperating with the lower opening groove (340) is arranged around the force applying part (341); a plurality of force applying springs (342) are arranged in the lower opening groove (340); two ends of the force applying springs (342) are respectively fixedly connected to the lower opening groove (340) and the force applying part (341); A force-applying airbag (8) is provided in the lower opening groove (340), and the force-applying airbag (8) is connected to a solenoid valve (6) pipeline outside the trolley guide rail through a first air path (10), and the solenoid valve (6) is connected to a pipeline of an air storage bag (9) through a second pipeline (11); the solenoid valve (6) is electrically connected to a control device; The first gas path (10) is provided with a pressure relief valve (7).

4. The device for preventing a 35kVPT trolley from tipping over according to claim 3 is characterized in that: The plane where the bottom of the force-applying part (341) is located intersects with the plane where the running wheels of the PT trolley (1) on the inclined guide rail (3) are located, and the angle between the two planes gradually decreases downward along the inclined guide rail (3).

5. The device for preventing a 35kVPT trolley from tipping over according to claim 2 is characterized in that: The horizontal guide rail (2) comprises a horizontal rail surface (20) in the middle and horizontal outer walls (28) on both sides; a horizontal frame (24) is provided between the horizontal outer wall (28) and the horizontal rail surface (20); a connecting shaft horizontal channel (25) for passing the connecting shaft (13) is formed in the middle of the horizontal frame (24) along the travel direction of the PT trolley (1); a large guide wheel horizontal channel (22) is formed between the horizontal frame (24) and the horizontal rail surface (20); and a small guide wheel horizontal channel (21) is formed below the horizontal rail surface (20); The horizontal rail surface (20), the horizontal outer wall (28), and the horizontal frame (24) are respectively fixedly connected to the inclined rail surface (30), the inclined outer wall (38), and the inclined frame (34); The connecting shaft horizontal channel (25), the large guide wheel horizontal channel (22), and the small guide wheel horizontal channel (21) are respectively connected to the connecting shaft inclined channel (35), the large guide wheel inclined channel (32), and the small guide wheel inclined channel (31).

6. The device for preventing the 35kVPT trolley from tipping over according to claim 5 is characterized in that: The speed measuring mechanism (5) comprises: The speed measuring belt channel comprises a speed measuring belt horizontal channel (23) and a speed measuring belt inclined channel (33); the speed measuring belt horizontal channel (23) is arranged between the horizontal frame (24) and the horizontal outer wall (28); the speed measuring belt inclined channel (33) is arranged between the inclined frame (34) and the inclined outer wall (38); the speed measuring belt inclined channel (33) is connected to the speed measuring belt horizontal channel (23); The guide roller group comprises a first rotating roller (53), a second rotating roller (54) and a plurality of steering rollers (55); the first rotating roller (53) is fixedly arranged at the front end of the horizontal guide rail (2); the second rotating roller (54) is fixedly arranged at the end of the inclined guide rail (3); the steering roller (55) is fixedly arranged at the connection between the horizontal guide rail (2) and the inclined guide rail (3); A speed measuring belt (56) is arranged in the speed measuring belt channel; the two ends of the speed measuring belt are respectively sleeved outside the first rotating roller (53) and the second rotating roller (54); the steering roller (55) is arranged below the speed measuring belt (56) to make the speed measuring belt (56) parallel to the horizontal guide rail (2) in horizontal direction and the same inclination direction as the inclined guide rail (3) in inclined direction; A speed sensor is arranged on the rotating shaft of the first rotating roller (53) and is used to measure the angular velocity of the rotating shaft of the first rotating roller (53); the speed sensor is fixedly arranged on the outer cover, and the outer cover is fixedly arranged on the horizontal outer wall (28); The speed measuring part (57) is fixedly arranged above the speed measuring belt (56). When the PT trolley (1) moves, the speed measuring part (57) is driven to move, thereby causing the speed measuring belt (56) to rotate. The speed measuring belt (56) drives the first rotating roller (53) to rotate to achieve speed measurement.

7. The device for preventing the 35kVPT trolley from tipping over according to claim 6 is characterized in that: One end of the rotating shaft of the first rotating roller (53) is fixedly connected to the mounting plate, and the safety plate is fixedly mounted on the horizontal frame (24); the other end is externally rotatably sleeved with a rotating ring (52), and the rotating ring (52) is rotatably sleeved in the mounting ring (51), and the mounting ring (51) is arranged in a speed measuring hole (50) opened on the horizontal outer wall (28); the mounting ring (51) is fixedly connected to the horizontal outer wall (28); The speed measuring end of the speed measuring sensor is fixedly connected to the rotating ring (52); The speed sensor is electrically connected to the control device.

8. The device for preventing a 35kVPT trolley from tipping over according to claim 6 is characterized in that: The speed measuring part (57) comprises a connecting seat (570) fixedly arranged on the speed measuring belt (56), and an outer cylinder (571) is fixedly arranged on the connecting seat (570); an electromagnet (572) is fixedly arranged in one end of the outer cylinder (571) away from the PT trolley (1), and a fixing block (575) is fixedly arranged in the other end; a through hole is provided in the middle of the electromagnet (572) and the fixing block (575); An iron sliding block (573) is slidably disposed in the outer cylinder (571), a compression spring (574) is disposed between the sliding block (573) and the electromagnet (572), a guide rod (578) is inserted into the compression spring (574), one end of the guide rod (578) is fixedly connected to the sliding block (573), and the other end of the guide rod (578) passes through the electromagnet (572) and is slidably connected to the electromagnet (572); The other end of the sliding block (573) is provided with a speed measuring rod (576), one end of the speed measuring rod (576) is fixedly connected to the sliding block (573), and the other end of the speed measuring rod (576) passes through the fixed block (575) and is slidably connected to the fixed block (575); The electromagnet (572) is electrically connected to the control device.

9. The device for preventing a 35kVPT trolley from tipping over according to claim 8 is characterized in that: A horizontal speed measuring groove (27) is provided on the horizontal frame (24) along the moving direction of the speed measuring rod (576); a horizontal guide groove (26) is provided on the horizontal outer wall (28) along the moving direction of the guide rod (578); An inclined speed measuring groove (37) is provided on the inclined frame (24) along the moving direction of the speed measuring rod (576); and an inclined guide groove (36) is provided on the inclined outer wall (38) along the moving direction of the guide rod (578).

10. The device for preventing a 35kVPT trolley from tipping over according to claim 6 is characterized in that: The first rotating roller (53) and the second rotating roller (54) are both ball bearings.

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