Cable branch box convenient for switching operation

Abstract

The invention relates to the technical field of cable branch boxes, in particular to a cable branch box convenient for switch operation, which comprises a box body and a box door, a groove is horizontally formed in the side, facing the outside of the box body, of the box door, a pressing plate is slidably arranged in the groove in the extending direction of the groove, a gap exists between the pressing plate and the bottom of the groove, a corrugated sleeve is arranged in the gap in the sliding direction of the pressing plate, and the two ends of the corrugated sleeve are fixedly connected with the bottom of the groove and the pressing plate respectively. The corrugated sleeve forms an extrusion cavity, a transmission unit is arranged at the end part of a switch gate of the grounding switch, the transmission unit is pneumatically driven, the extrusion cavity is communicated with the transmission unit, after the extrusion cavity is extruded, air in the extrusion cavity is injected into the transmission unit, and the transmission unit drives the switch gate of the grounding switch to be switched on. And then the box door is rotationally opened. According to the invention, when the box door is opened, the grounding switch is closed.

Description

Technical Field

[0001] The invention relates to the technical field of cable branch boxes, and in particular to a cable branch box which is convenient for switch operation. Background Art

[0002] At present, most of the cable branch boxes have exposed copper at the connection points of the incoming switch posts and the main busbar connections. When working in this situation, operators are prone to electric shock during power supply operations, resulting in injuries to workers and causing inconvenience to use.

[0003] Chinese patent application CN114883990A discloses a cable branch box that is easy to operate safely, including a branch box body, which is divided into two parts, front and rear, in the middle, and a cable branch box front door is installed at the front end of the branch box body, and a cable branch box rear door is installed at the rear end of the cable branch box front door and at the rear end of the branch box body, and heat dissipation louvers are provided on the outer surfaces of the side ends of the branch box body, a main busbar is installed in the middle of the interior of the branch box body, and a No. 1 transparent acrylic plate is installed in front of the main busbar, a No. 2 transparent acrylic plate is installed behind the main busbar, and an outgoing line switch is connected to the bottom of the main busbar, an incoming line switch is installed above the main busbar, and an incoming line switch arc extinguishing cover is provided on the incoming line switch.

[0004] The above scheme isolates the live parts of the cable branch box by shielding with the arc extinguishing cover of the incoming switch and the acrylic plate. However, in daily maintenance, a grounding switch is provided in the cable branch box. When the cable branch box is operating normally, the grounding switch is in the disconnected state. When the cable branch box needs to be inspected and repaired, the grounding switch needs to be adjusted to the grounded state. However, the traditional adjustment method requires manual adjustment. In the prior art, although there is a device that automatically connects the grounding switch when the door of the cable branch box is opened, when the above device closes the grounding switch, the closing state of the grounding switch is synchronized with the opening of the box door. In this way, during the process of opening the box door, if there is a leakage in the cable branch box, and the grounding switch is not completely closed at this time, electric shock is still prone to occur. Summary of the invention

[0005] In view of the above problems, a cable branch box is provided which is convenient for switch operation. When using the cable branch box, a pressing plate needs to be pressed first, and the pressing plate slides in the groove along the extension direction of the groove. The corrugated sleeve between the pressing plate and the bottom of the groove is squeezed by the pressing plate, and the air in the extrusion cavity formed by the corrugated sleeve is injected into the transmission unit. Under the action of the flowing air, the transmission unit drives the switch gate on the grounding switch to rotate, so that the grounding switch is closed after the pressing plate is fully pressed. It is worth noting that before the pressing plate is pressed, the box door arranged on the side wall of the box body cannot be rotated to open, that is, the box door can be opened normally only after the pressing plate is pressed. A handle is arranged on the pressing plate. When pressing the pressing plate, hold the handle with your hand and push it along the extension direction of the groove. After the pressing plate is completely pressed into the groove, turn the handle. If the pressing plate is not completely pressed into the groove, the handle cannot be rotated normally even if it is subjected to external rotational force, that is, the box door cannot be opened normally. After the pressing plate is completely pressed, the handle can be rotated normally. At this time, all the gas in the extrusion chamber flows into the transmission unit, and the transmission unit can drive the grounding switch to close. Then turn the handle again. At this time, the box door is unlocked from the side of the box body, so that the box door can be rotated and opened, ensuring that the grounding switch has been closed when the box door is opened, ensuring that the staff will not get accidental electric shock when performing maintenance.

[0006] In order to solve the problems of the prior art, the present invention provides a cable branch box which is convenient for switch operation, comprising a box body with an earthing switch arranged inside and a box door arranged on the box body; a groove is horizontally opened on one side of the box door facing the outside of the box body, a pressing plate is slidably arranged in the groove along the extension direction of the groove, a gap exists between the pressing plate and the bottom of the groove, a corrugated sleeve is arranged in the gap along the sliding direction of the pressing plate, and the two ends of the corrugated sleeve are respectively fixedly connected to the bottom of the groove and the pressing plate, the corrugated sleeve forms an extrusion chamber, a transmission unit is arranged at the switch gate end of the grounding switch, the transmission unit is pneumatically driven, the extrusion chamber is communicated with the transmission unit, after the extrusion chamber is squeezed, the air in the extrusion chamber is injected into the transmission unit, the transmission unit drives the switch gate of the grounding switch to close, when in use, the pressing plate is pressed first, and then the box door is rotated to open.

[0007] Preferably, a first gear is rotatably provided on the box body at the bottom of the box door, a second gear is rotatably provided on the box door, and the second gear is meshed with the first gear, a vane pump is provided at the end of the second gear, an input end of the vane pump is connected to the extrusion chamber, an output end of the vane pump is connected to the outside world, and the first gear rotates synchronously with the switch gate of the grounding switch.

[0008] Preferably, a rotating shaft is provided on the pressing plate, the rotating shaft passes through the pressing plate and extends into the box door, a handle is fixedly provided at one end of the rotating shaft located on the outer side of the pressing plate, and a lifting unit is also provided on the rotating shaft, the lifting unit includes a lifting frame moving in a vertical direction, the lifting frame is provided on the box door, the second gear is installed on the lifting frame, the second gear moves synchronously with the lifting frame, when the handle is in a horizontal state, the lifting frame is in the lowest position, and when the handle is in a vertical state, the lifting frame is in the highest position.

[0009] Preferably, a winding drum is provided on the rotating shaft along the axis of the rotating shaft, the winding drum is key-connected to the rotating shaft and slides along the axis of the rotating shaft, a connecting rope is wound around the winding drum, one end of the connecting rope is fixed on the winding drum, and the other end of the connecting rope is fixedly connected to the upper part of the lifting frame.

[0010] Preferably, a lock unit is arranged in the box body, and the lock unit includes a lock core which moves along the width direction of the box door, and a third gear is rotatably arranged on the upper part of the lock core, and meshing teeth are evenly arranged on the upper part of the lock core along the width direction of the box door, and the third gear is meshed with the meshing teeth on the lock core, and a lock groove is horizontally arranged on the box body, and the lock groove is plug-fitted with the lock core, and the axis of the rotating shaft is colinear with the axis of the third gear, and the third gear rotates synchronously with the rotating shaft.

[0011] Preferably, a reset unit is provided in the groove, and the reset unit includes a spring. The spring is arranged in the gap along the sliding direction of the pressing plate, and the two ends of the spring are fixedly connected to the pressing plate and the bottom of the groove respectively. When the pressing plate is pressed into the groove along the extension direction of the groove, the spring is in a compressed state.

[0012] Preferably, a magnetic ring is fixedly provided at the opening of the groove, and the magnetic ring has an adsorption effect on the pressing plate. When the pressing plate is not subjected to external pressing force, the pressing plate is in contact with the magnetic ring.

[0013] Preferably, a limiting unit is provided on the box body, and the limiting unit includes a limiting rod fixedly provided on the rotating shaft along the radial direction of the rotating shaft, and a first limiting shell and a second limiting shell are sequentially provided in the groove along the pressing direction of the pressing plate, and the rotating shaft moves synchronously with the pressing plate, and the first limiting shell has a rectangular cavity structure, and the second limiting shell has a fan-shaped cavity structure, and when the handle is in a horizontal state, the limiting rod is in a vertical state and is located in the first limiting shell and slidably cooperates with the first limiting shell, and when the handle is in a vertical state, the limiting rod is in a horizontal state, and the limiting rod is located in the second limiting shell.

[0014] Preferably, the transmission unit further comprises a plurality of synchronous wheels, wherein two synchronous wheels are respectively fixedly disposed at the switch gate end of the grounding switch and the end of the first gear, and the synchronous belt is sleeved on the synchronous wheels and cooperates with the synchronous wheels in transmission.

[0015] Preferably, the handle, the box body, the box door and the pressing plate are all coated with insulating paint on the outside.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. When the present invention is used, the pressing plate needs to be pressed first, and the pressing plate slides in the groove along the extension direction of the groove. The corrugated sleeve between the pressing plate and the bottom of the groove is squeezed under the action of the pressing plate, and the air in the extrusion cavity formed by the corrugated sleeve is injected into the transmission unit. Under the action of the flowing air, the transmission unit drives the switch gate on the grounding switch to rotate, so that the grounding switch is closed after the pressing plate is fully pressed. It is worth noting that before the pressing plate is pressed, the box door arranged on the side wall of the box body cannot be rotated to open, that is, only after the pressing plate is pressed, the box door can be opened normally. A handle is arranged on the pressing plate. When the pressing plate is pressed, When the door is opened, the operator holds the handle with his hand and pushes it in the extension direction of the groove. After the pressing plate is completely pressed into the groove, the handle is turned. If the pressing plate is not completely pressed into the groove, the handle cannot be turned normally even by external rotational force, that is, the door cannot be opened normally. After the pressing plate is completely pressed, the handle can be turned normally. At this time, all the gas in the extrusion chamber flows into the transmission unit, and the transmission unit can drive the grounding switch to close. Then turn the handle again. At this time, the door is unlocked from the side of the box body, so that the door can be turned and opened, ensuring that the grounding switch has been closed when the door is opened, ensuring that the staff will not get accidental electric shock when performing maintenance.

[0017] 2. A handle is provided on the pressing plate, and a lifting unit and a locking unit are provided on a rotating shaft connected to the handle, so that when the handle is rotated, the lifting unit can lift the second gear so that the second gear is disengaged from the first gear, and at the same time the handle can also unlock the lock, thereby smoothly opening the door.

[0018] 3. A spring and a magnet are arranged in the groove so that the pressing plate can be completely reset when reset, ensuring that the second gear can mesh smoothly after being separated from the first gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of a cable branch box that is convenient for switch operation.

[0020] Figure 2 The present invention is a three-dimensional schematic diagram of a cable branch box with the box body removed for easy switch operation.

[0021] Figure 3 It is a cable branch box that is easy to operate on and off. Figure 2 A local enlarged schematic diagram of point A in the middle.

[0022] Figure 4 It is a cable branch box that is easy to operate on and off. Figure 2 A local enlarged schematic diagram of point B in the middle.

[0023] Figure 5 It is a cutaway three-dimensional schematic diagram of a cable branch box for easy switch operation.

[0024] Figure 6 It is a cable branch box that is easy to operate on and off. Figure 5 A partial enlarged schematic diagram of point C in the middle.

[0025] Figure 7 It is a cable branch box that is easy to operate on and off. Figure 5 A local enlarged schematic diagram of point D in the middle.

[0026] Figure 8 It is a cable branch box that is easy to operate on and off. Figure 5 A partial enlarged schematic diagram of point E in the middle.

[0027] Fig. 9 The present invention is a three-dimensional schematic diagram of a cable branch box which is convenient for switch operation, with the synchronous wheel, synchronous belt, box door and box body removed.

[0028] Fig.10 It is a cable branch box that is easy to operate on and off. Fig. 9 A partial enlarged schematic diagram of point F in the middle.

[0029] Fig.11 The present invention is a three-dimensional schematic diagram of a box door of a cable branch box which is convenient for switch operation and is not provided with a pressing plate.

[0030] The numbers in the figure are: 1. Box body; 11. Earthing switch; 2. Box door; 21. Groove; 3. Pressing plate; 31. Corrugated sleeve; 32. Rotating shaft; 33. Handle; 34. Lifting unit; 341. Lifting frame; 342. Connecting rope; 343. Winding disk; 35. Guide groove; 36. Lock unit; 361. Lock core; 362. Third gear; 3621. Inserting groove; 4. Transmission unit; 41. First gear; 42. Second gear; 43. Vane pump; 44. Synchronous wheel; 45. Synchronous belt; 5. Reset unit; 51. Spring; 52. Magnetic ring; 6. Limiting unit; 61. Limiting rod; 62. First limiting shell; 63. Second limiting shell. DETAILED DESCRIPTION

[0031] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] Reference Figure 1 , Figure 2 , Figure 7 and Fig.11 : A cable branch box for convenient switch operation, comprising a box body 1 with an earthing switch 11 arranged inside and a box door 2 arranged on the box body 1; a groove 21 is horizontally opened on one side of the box door 2 facing the outside of the box body 1, and a pressing plate 3 is slidably arranged in the groove 21 along the extension direction of the groove 21, and there is a gap between the pressing plate 3 and the bottom of the groove 21, and a corrugated sleeve 31 is arranged in the gap along the sliding direction of the pressing plate 3, and the two ends of the corrugated sleeve 31 are respectively fixedly connected to the bottom of the groove 21 and the pressing plate 3, and the corrugated sleeve 31 forms an extrusion chamber, and a transmission unit 4 is arranged at the switch gate end of the grounding switch 11, and the transmission unit 4 is pneumatically driven, and the extrusion chamber is communicated with the transmission unit 4. After the extrusion chamber is squeezed, the air in the extrusion chamber is injected into the transmission unit 4, and the transmission unit 4 drives the switch gate of the grounding switch 11 to close. When in use, the pressing plate 3 is pressed first, and then the box door 2 is rotated to open.

[0033] When the cable branch box is operating normally, the grounding switch 11 is in the disconnected state. When the staff needs to inspect the cable branch box, they need to close the grounding switch 11 in the cable branch box. In the traditional closing method, the box door 2 on the box body 1 is opened and the grounding switch 11 is closed synchronously. After the box door 2 is fully opened, the grounding switch 11 is closed. If there is leakage in the box body 1, the grounding switch 11 is in the disconnected state when the box door 2 is just opened. This may easily cause the charged box body 1 to cause harm to the staff. In order to avoid the above problems, the closing structure of the existing grounding switch 11 is improved. The specific working principle is as follows. When using it, the pressing plate 3 needs to be pressed first, and the pressing plate 3 slides in the groove 21 along the extension direction of the groove 21. The corrugated sleeve 31 between the pressing plate 3 and the bottom of the groove 21 is squeezed under the action of the pressing plate 3, and the air in the extrusion cavity formed by the corrugated sleeve 31 is injected into the transmission unit 4. The transmission unit 4 drives the switch gate on the grounding switch 11 to rotate under the action of the flowing air. The switch 11 is closed after the pressing plate 3 is fully pressed. It is worth noting that before the pressing plate 3 is pressed, the box door 2 arranged on the side wall of the box body 1 cannot be rotated to open, that is, only after the pressing plate 3 is pressed, the box door 2 can be opened normally. A handle 33 is provided on the pressing plate 3. When pressing the pressing plate 3, the handle 33 is grasped by hand and pushed along the extension direction of the groove 21. After the pressing plate 3 is fully pressed into the groove 21, the handle 33 is rotated. If the pressing plate 3 is not fully pressed into the groove 21, the handle 33 is The box door 2 cannot be rotated normally even by external rotational force, that is, the box door 2 cannot be opened normally. After the pressing plate 3 is fully pressed, the handle 33 can be rotated normally. At this time, the gas in the extrusion chamber all flows into the transmission unit 4, and the transmission unit 4 can drive the grounding switch 11 to close. Then, the handle 33 is turned again. At this time, the box door 2 is unlocked from the side of the box body 1, so that the box door 2 can be rotated and opened, ensuring that the grounding switch 11 has been closed when the box door 2 is opened, ensuring that the staff will not accidentally get an electric shock when performing maintenance.

[0034] Reference Figure 2 , Figure 8 and Fig. 9 : A first gear 41 is rotatably provided on the box body 1 at the bottom of the box door 2, a second gear 42 is rotatably provided on the box door 2, and the second gear 42 and the first gear 41 are meshed with each other, a vane pump 43 is provided at the end of the second gear 42, an input end of the vane pump 43 is connected to the extrusion chamber, an output end of the vane pump 43 is connected to the outside, and the first gear 41 rotates synchronously with the switch gate of the grounding switch 11.

[0035] When the box door 2 is closed on the box body 1, the second gear 42 arranged on the box door 2 and the first gear 41 on the box body 1 are in a state of mutual meshing. When the box door 2 needs to be opened, the staff needs to first press the pressing plate 3 along the extension direction of the groove 21, so that the pressing plate 3 slides into the groove 21, and the gas in the extrusion chamber formed by the corrugated sleeve 31 flows into the vane pump 43 through the input end of the vane pump 43. The vane pump 43 rotates under the action of the flowing airflow, that is, the driving end of the vane pump 43 drives the second gear 42, and the second gear 42 is meshed with the first gear 41 at this time. In this way, after the second gear 42 rotates, the first gear 41 can be driven to rotate. Since the first gear 41 rotates synchronously with the switch gate of the grounding switch 11, after the first gear 41 rotates, the switch gate of the grounding switch 11 rotates synchronously, so that the grounding switch 11 completes the closing.

[0036] Reference Figure 6 , Figure 8 and Fig. 9 A rotating shaft 32 is arranged on the pressing plate 3, and the rotating shaft 32 passes through the pressing plate 3 and extends into the box door 2. A handle 33 is fixedly arranged at one end of the rotating shaft 32 located on the outer side of the pressing plate 3. A lifting unit 34 is also arranged on the rotating shaft 32. The lifting unit 34 includes a lifting frame 341 which moves along the vertical direction. The lifting frame 341 is arranged on the box door 2, and the second gear 42 is installed on the lifting frame 341. The second gear 42 moves synchronously with the lifting frame 341. When the handle 33 is in a horizontal state, the lifting frame 341 is located at the lowest position. When the handle 33 is in a vertical state, the lifting frame 341 is located at the highest position.

[0037] The lifting frame 341 has a highest position and a lowest position in its vertical movement stroke. When the box door 2 is closed on the box body 1, the handle 33 is in a horizontal state. At this time, the lifting frame 341 is in the lowest position, and the first gear 41 and the second gear 42 are meshed with each other. After the pressing plate 3 is pressed, the second gear 42 drives the first gear 41 to rotate, so that the switch of the grounding switch 11 is closed. Then the handle 33 is rotated, and the end of the rotating shaft 32 located in the box door 2 is connected to the lock unit 36. After the handle 33 is rotated, the lock unit 36 ​​can be unlocked, so that the box door 2 can be opened. When the handle 33 is rotated to unlock, it can also drive the lifting unit 34 to operate, that is, the handle 33 is rotated. After that, the lifting frame 341 rises in the vertical direction. At this time, the second gear 42 arranged on the lifting frame 341 rises synchronously with the lifting frame 341, and the second gear 42 is disengaged from the first gear 41. When the handle 33 is rotated from the horizontal state to the vertical state, the lock unit 36 ​​is unlocked, and the lifting frame 341 also drives the second gear 42 to completely disengage from the first gear 41, so that the unlocked door 2 can be opened smoothly. If the lifting unit 34 is not provided, when the door 2 needs to be opened, since the first gear 41 and the second gear 42 are always in a meshing state, the first gear 41 and the second gear 42 in meshing will lock the door 2, causing the door 2 to be unable to be opened normally. A guide groove 35 is provided on the box door 2 in the vertical direction, and the lifting frame 341 is slidably set in the guide groove 35 in the vertical direction. The guide groove 35 limits the moving direction of the lifting frame 341, that is, under the guidance of the guide groove 35, the lifting frame 341 can only slide along the extension direction of the guide groove 35, that is, the lifting frame 341 can only move in the vertical direction, so as to avoid the lifting frame 341 from shaking during the lifting process, causing the first gear 41 to rotate slightly, which in turn causes the first gear 41 and the second gear 42 to fail to engage smoothly when the box door 2 is closed for the second time.

[0038] Reference Figure 6 : A winding drum 343 is sleeved on the rotating shaft 32 along the axis of the rotating shaft 32. The winding drum 343 is key-connected to the rotating shaft 32 and slides along the axis direction of the rotating shaft 32. A connecting rope 342 is wound around the winding drum 343. One end of the connecting rope 342 is fixed on the winding drum 343, and the other end of the connecting rope 342 is fixedly connected to the upper part of the lifting frame 341.

[0039] The winding disk 343 is rotatably arranged in the box door 2, and the winding disk 343 cannot move along the axial direction of the rotating shaft 32. Since the winding disk 343 is key-connected with the rotating shaft 32, when the rotating shaft 32 rotates, the rotating shaft 32 can drive the winding disk 343 to rotate, and the rotated winding disk 343 can reel in the connecting rope 342. Although the rotation angle of the rotating disk is 90 degrees, it is only necessary to disengage the first gear 41 and the second gear 42, so there is no need to lift the second gear 42 to a higher height. The rotation angle of the rotating disk is 90 degrees because the angle required for the handle 33 to rotate from a horizontal state to a vertical state is 90 degrees, and the rotating disk rotates synchronously with the rotating shaft 32, so the maximum rotation angle of the rotating disk during rotation is 90 degrees.

[0040] Reference Figure 2 , Figure 3 , Figure 5 , Figure 6 and Fig.10 A lock unit 36 ​​is arranged in the box body 1, and the lock unit 36 ​​includes a lock core 361 which moves along the width direction of the box door 2. A third gear 362 is rotatably arranged on the upper part of the lock core 361. Meshing teeth are evenly arranged on the upper part of the lock core 361 along the width direction of the box door 2. The third gear 362 meshes with the meshing teeth on the lock core 361. A lock groove is horizontally arranged on the box body 1. The lock groove is plug-fitted with the lock core 361. The axis of the rotating shaft 32 is colinear with the axis of the third gear 362. The third gear 362 rotates synchronously with the rotating shaft 32.

[0041] An insertion groove 3621 is provided at the end of the third gear 362. The insertion groove 3621 is a non-circular structure. The insertion groove 3621 is plugged into the rotating shaft 32. When the handle 33 slides into the groove 21 along the extension direction of the groove 21 along the pressing plate 3, the end of the rotating shaft 32 away from the handle 33 gradually approaches the insertion groove 3621, and slides into the insertion groove 3621 after the pressing plate 3 is completely pressed. At this time, when the handle 33 is turned, the handle 33 can drive the third gear 362 to rotate through the rotating shaft 32. When the handle 33 is in a horizontal state, the lock core 361 and the lock slot are in an inserted state, and the box door 2 cannot be opened at this time. When the cable branch box needs to be repaired, the pressing plate 3 is pressed down first, and the grounding switch 11 is closed. Then the handle 33 is rotated, and the handle 33 drives the third gear 362 to rotate through the rotating shaft 32. Since the meshing teeth on the third gear 362 and the lock core 361 are meshed with each other, after the third gear 362 is rotated, the lock core 361 can move along the width direction of the box door 2, and the handle 33 is moved from the horizontal state to the horizontal state. During the process of rotating from the vertical state to the vertical state, the lock core 361 slides out of the lock slot under the drive of the third gear 362, so that the box door 2 is unlocked, and then the box door 2 can be pulled open by the handle 33. After the inspection is completed, the box door 2 is opened in the same way. After the box door 2 is closed, the handle 33 is rotated from the vertical state to the horizontal state, and the lifting unit 34 lowers the second gear 42, so that the second gear 42 and the first gear 41 are engaged with each other. At the same time, the third gear 362 rotates synchronously with the rotating shaft 32 to push the lock core 361 into the lock slot.

[0042] Reference Figure 3 and Figure 7 : A reset unit 5 is arranged in the groove 21, and the reset unit 5 includes a spring 51. The spring 51 is arranged in the gap along the sliding direction of the pressing plate 3. The two ends of the spring 51 are fixedly connected to the pressing plate 3 and the bottom of the groove 21 respectively. When the pressing plate 3 is pressed into the groove 21 along the extension direction of the groove 21, the spring 51 is in a compressed state.

[0043] After the pressing plate 3 is pressed, the spring 51 located in the gap is compressed. When the handle 33 is rotated from the horizontal state to the vertical state, the box door 2 is unlocked. At this time, the first gear 41 and the second gear 42 are disengaged. At the same time, the spring 51 located in the gap is always in a compressed state. When the inspection is completed and the box door 2 is closed, the staff puts the handle 33 in a horizontal position. At this time, the lifting frame 341 drives the second gear 42 to descend and mesh with the first gear 41 located on the box body 1. At the same time, the spring 51 drives the pressing plate 3 to pop out along the extension direction of the groove 21 under the action of its own reset elastic force. At this time, the extrusion chamber is gradually restored under the pull of the pressing plate 3, that is, the extrusion chamber is in an inflated state, and the outside air enters the vane pump 43 from the output end of the vane pump 43, and after driving the blades in the vane pump 43, it flows out from the input end of the vane pump 43 and fills the extrusion chamber. When the extrusion plate completes the reset, the switch gate of the grounding switch 11 is smoothly disconnected, and the cable branch box can work smoothly.

[0044] Reference Figure 7 A magnetic ring 52 is fixedly arranged at the opening of the groove 21. The magnetic ring 52 has an adsorption effect on the pressing plate 3. When the pressing plate 3 is not subjected to external pressing force, the pressing plate 3 is in contact with the magnetic ring 52.

[0045] Since the spring 51 will be fatigued after long-term use, that is, after the pressing plate 3 is pressed multiple times, the elastic force of the spring 51 begins to decay. The elastic force of the spring 51 is the key driving force for driving the extrusion chamber to be inflated. If the elastic force of the spring 51 decays, the extrusion chamber will not be fully inflated. In this way, it is easy for the switch gate of the grounding switch 11 to be unable to be completely disconnected. Some grounding switches 11 have two gates, and the switch gate switches between the two gates. The two gates correspond to the grounding state and the power-on state of the cable branch box respectively. If the pressing plate 3 is not fully inflated due to the elastic force of the spring 51, the pressure of the spring 51 will be reduced. If the pressing plate 3 is not completely reset, the grounding switch 11 cannot be switched smoothly, and the cable branch box cannot be powered on smoothly. In order to avoid the above situation, a magnetic ring 52 is provided on the groove 21. When the spring 51 pushes the pressing plate 3 to reset, the pressing plate 3 gradually approaches the magnetic ring 52. The magnetic ring 52 attracts the pressing plate 3 by magnetic force, thereby ensuring that the pressing plate 3 can be completely reset, and the number of rotations of the second gear 42 in the forward and reverse directions does not change, thereby ensuring that the second gear 42 can still mesh smoothly after being separated from the first gear 41.

[0046] Reference Figure 6 , Fig. 9 and Fig.10: A limiting unit 6 is arranged on the box body 1, and the limiting unit 6 includes a limiting rod 61 fixedly arranged on the rotating shaft 32 along the radial direction of the rotating shaft 32. A first limiting shell 62 and a second limiting shell 63 are sequentially arranged in the groove 21 along the pressing direction of the pressing plate 3. The rotating shaft 32 moves synchronously with the pressing plate 3. The first limiting shell 62 has a rectangular cavity structure, and the second limiting shell 63 has a fan-shaped cavity structure. When the handle 33 is in a horizontal state, the limiting rod 61 is in a vertical state and is located in the first limiting shell 62 and slidably cooperates with the first limiting shell 62. When the handle 33 is in a vertical state, the limiting rod 61 is in a horizontal state, and the limiting rod 61 is located in the second limiting shell 63.

[0047] When the handle 33 is in a horizontal state and the pressing plate 3 is not pressed, the limiting plate arranged on the rotating shaft 32 is in a vertical state, and the limiting rod 61 is located in the first limiting shell 62, and the first limiting shell 62 has a rectangular cavity structure. In this way, the limiting rod 61 in the first limiting shell 62 in a vertical state cannot rotate, and can only slide along the extension direction of the groove 21 with the rotating shaft 32. When the handle 33 drives the pressing plate 3 to slide into the groove 21 along the extension direction of the groove 21, the limiting rod 61 moves from the first limiting shell 62 toward the second limiting shell 63. When the pressing plate 3 is fully pressed into the groove 21, the limiting rod 61 slides into the second limiting shell 63. Since the second limiting shell 63 has a fan-shaped cavity structure, the limiting rod 61 entering the second limiting shell 63 can rotate the second limiting shell 63. When the limiting rod 61 enters the second limiting shell 63, the end of the rotating shaft 32 is plugged into the insertion groove 3621 at the end of the third gear 362. Then, the handle 33 is rotated so that the handle 33 is rotated from the horizontal state to the vertical state. Driven by the rotating shaft 32, the limiting rod 61 is also The second limiting shell 63 is rotated 90 degrees in the second limiting shell 63, so that the second limiting shell 63 can limit the limiting rod 61, that is, at this time, the rotating shaft 32 cannot move along the extension direction of the groove 21, that is, at this time, the spring 51 cannot drive the pressing plate 3 to return to the initial position, and due to the elastic force of the spring 51, a large pressure is generated between the limiting rod 61 and the side wall of the second limiting shell 63, that is, the friction between the limiting rod 61 and the second limiting shell 63 is large, which prevents the lifting frame 341 and the second gear 42 from driving the rotating winding disk 343 to rotate under the action of gravity. This ensures that the box door 2 can be opened smoothly. After the inspection is completed, the handle 33 is rotated 90 degrees so that the handle 33 is rotated from a vertical state to a horizontal state. The limit rod 61 rotates synchronously with the rotating shaft 32. At this time, although the limit rod 61 is in the second limit shell 63, it can also fit into the rectangular cavity structure in the first limit shell 62. At this time, the handle 33 is released, and under the action of the spring 51, the rotating shaft 32 slides out of the insertion groove 3621 of the third gear 362, and the limit rod 61 on the rotating shaft 32 slides from the second limit shell 63 into the first limit shell 62.

[0048] Reference Figure 4 The transmission unit 4 further comprises a plurality of synchronous wheels 44, wherein two synchronous wheels 44 are respectively fixedly disposed at the switch gate end of the grounding switch 11 and the end of the first gear 41, and a synchronous belt 45 is sleeved on the synchronous wheel 44 and cooperates with the synchronous wheel 44 in transmission.

[0049] When the extrusion chamber is squeezed and the air in the extrusion chamber flows into the vane pump 43, the vane pump 43 drives the second gear 42 to rotate, thereby rotating the first gear 41. Under the transmission of the synchronous wheel 44 and the synchronous belt 45, the switch gate of the grounding switch 11 is closed.

[0050] Reference Figure 1 - Fig.11 : The handle 33, the box body 1, the box door 2 and the pressing plate 3 are all coated with insulating paint.

[0051] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A cable branch box that facilitates switch operation, comprising a box body (1) having an earthing switch (11) disposed therein and a box door (2) disposed on the box body (1); It is characterized in that A groove (21) is horizontally provided on one side of the box door (2) facing the outside of the box body (1), and a pressing plate (3) is slidably provided in the groove (21) along the extension direction of the groove (21). A gap exists between the pressing plate (3) and the bottom of the groove (21). A corrugated sleeve (31) is provided in the gap along the sliding direction of the pressing plate (3), and two ends of the corrugated sleeve (31) are respectively fixedly connected to the bottom of the groove (21) and the pressing plate (3). The corrugated sleeve (31) forms an extrusion chamber. A transmission unit (4) is provided at the switch gate end of the grounding switch (11). The transmission unit (4) is pneumatically driven. The extrusion chamber is communicated with the transmission unit (4). After the extrusion chamber is squeezed, the air in the extrusion chamber is injected into the transmission unit (4), and the transmission unit (4) drives the switch gate of the grounding switch (11) to close. When in use, the pressing plate (3) is pressed first, and then the box door (2) is rotated to open.

2. A cable branch box that facilitates switch operation according to claim 1, characterized in that: A first gear (41) is rotatably arranged on the box body (1) at the bottom of the box door (2), a second gear (42) is rotatably arranged on the box door (2), and the second gear (42) and the first gear (41) are meshed with each other, a vane pump (43) is arranged at the end of the second gear (42), an input end of the vane pump (43) is communicated with the extrusion chamber, an output end of the vane pump (43) is communicated with the outside, and the first gear (41) rotates synchronously with the switch gate of the grounding switch (11).

3. A cable branch box for convenient switch operation according to claim 2, characterized in that: A rotating shaft (32) is rotatably arranged on the pressing plate (3), the rotating shaft (32) passes through the pressing plate (3) and extends into the box door (2), a handle (33) is fixedly arranged at one end of the rotating shaft (32) located outside the pressing plate (3), and a lifting unit (34) is also arranged on the rotating shaft (32), the lifting unit (34) comprises a lifting frame (341) that moves in a vertical direction, the lifting frame (341) is arranged on the box door (2), a second gear (42) is mounted on the lifting frame (341), the second gear (42) moves synchronously with the lifting frame (341), when the handle (33) is in a horizontal state, the lifting frame (341) is located at the lowest position, and when the handle (33) is in a vertical state, the lifting frame (341) is located at the highest position.

4. A cable branch box for convenient switch operation according to claim 3, characterized in that: A winding disk (343) is sleeved on the rotating shaft (32) along the axis of the rotating shaft (32). The winding disk (343) is key-connected to the rotating shaft (32) and slides along the axis of the rotating shaft (32). A connecting rope (342) is wound around the winding disk (343). One end of the connecting rope (342) is fixed to the winding disk (343), and the other end of the connecting rope (342) is fixedly connected to the upper part of the lifting frame (341).

5. A cable branch box for convenient switch operation according to claim 3, characterized in that: A lock unit (36) is arranged in the box body (1), and the lock unit (36) comprises a lock core (361) that moves along the width direction of the box door (2). A third gear (362) is rotatably arranged on the upper part of the lock core (361). Meshing teeth are evenly arranged on the upper part of the lock core (361) along the width direction of the box door (2). The third gear (362) and the meshing teeth on the lock core (361) mesh with each other. A lock groove is horizontally arranged on the box body (1). The lock groove and the lock core (361) are plug-fitted. The axis of the rotating shaft (32) is colinear with the axis of the third gear (362). The third gear (362) rotates synchronously with the rotating shaft (32).

6. A cable branch box for convenient switch operation according to claim 1, characterized in that: A reset unit (5) is arranged in the groove (21), and the reset unit (5) comprises a spring (51). The spring (51) is arranged in the gap along the sliding direction of the pressing plate (3), and the two ends of the spring (51) are respectively fixedly connected to the pressing plate (3) and the bottom of the groove (21). When the pressing plate (3) is pressed into the groove (21) along the extension direction of the groove (21), the spring (51) is in a compressed state.

7. A cable branch box for convenient switch operation according to claim 6, characterized in that: A magnetic ring (52) is fixedly arranged at the opening of the groove (21), and the magnetic ring (52) has an adsorption effect on the pressing plate (3). When the pressing plate (3) is not subjected to external pressing force, the pressing plate (3) is in contact with the magnetic ring (52).

8. A cable branch box for convenient switch operation according to claim 3, characterized in that: A limiting unit (6) is arranged on the box body (1), and the limiting unit (6) comprises a limiting rod (61) fixedly arranged on the rotating shaft (32) along the radial direction of the rotating shaft (32); a first limiting shell (62) and a second limiting shell (63) are arranged in sequence in the groove (21) along the pressing direction of the pressing plate (3); the rotating shaft (32) moves synchronously with the pressing plate (3); the first limiting shell (62) has a rectangular cavity structure, and the second limiting shell (63) has a fan-shaped cavity structure; when the handle (33) is in a horizontal state, the limiting rod (61) is in a vertical state and is located in the first limiting shell (62) and slidably cooperates with the first limiting shell (62); when the handle (33) is in a vertical state, the limiting rod (61) is in a horizontal state and is located in the second limiting shell (63).

9. A cable branch box for convenient switch operation according to claim 2, characterized in that: The transmission unit (4) further comprises a plurality of synchronous wheels (44), wherein two synchronous wheels (44) are respectively fixedly arranged at the switch gate end of the grounding switch (11) and the end of the first gear (41), and a synchronous belt (45) is sleeved on the synchronous wheel (44) and cooperates with the synchronous wheel (44) in transmission.

10. A cable branch box for convenient switch operation according to claim 3, characterized in that: The handle (33), the box body (1), the box door (2) and the pressing plate (3) are all coated with insulating paint on the outside.

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