A high and low voltage distribution cabinet with circuit safety protection function

Abstract

The present invention relates to the field of high and low voltage distribution cabinets, and specifically to a high and low voltage distribution cabinet with circuit safety protection function, including a main seat arranged in the distribution cabinet, and a pushing device, an intermittent pushing mechanism and an auxiliary mechanism arranged in the main seat; a lifting and lowering connecting frame arranged in the main seat; the pushing device comprises a connecting cylinder and a knife switch; the connecting cylinder is arranged on the main seat, an induction push rod is arranged on the connecting cylinder, and a first elastic member connected with the induction push rod is arranged in the connecting cylinder; the knife switch is rotatably arranged on the main seat, the knife switch is transmission-connected with a movable contact piece and a connecting frame, and when the knife switch pulls the connecting frame, the intermittent pushing mechanism controls the connecting frame to move intermittently; the auxiliary mechanism comprises a fixing component and a first control component, the fixing component is used to fix the connecting frame when the connecting frame is in a descending state, and the first control component is used to release the movement restriction of the connecting frame by the fixing component. The present invention solves the problem that the traditional distribution cabinet is easy to accidentally touch the knife switch during the maintenance process, resulting in a circuit breaker.

Description

Technical Field

[0001] The invention relates to the field of high and low voltage distribution cabinets, and in particular to a high and low voltage distribution cabinet with circuit safety protection function. Background Art

[0002] In order to ensure the circuit safety of the distribution cabinet, a circuit breaker mechanism is usually installed inside the distribution cabinet. In addition, operators need to regularly inspect and maintain the distribution cabinet. During the inspection, the operator may accidentally touch the gate, causing the gate to close, affecting the normal connection of the circuit.

[0003] To this end, Chinese patent CN117477381B discloses a circuit safety protection device for a high and low voltage distribution cabinet, which is provided with a positioning spring. The positioning spring drives the telescopic block to slide through its own elastic force. The sliding of the telescopic block drives the switch to rotate through the connecting support rod. At the same time, the movement of the switch and the connecting support rod drives the lifting contact piece on the outer wall of the connecting hole plate to fit closely with the fixed contact piece. By providing a positioning spring, the user is prevented from accidentally touching the switch. There is a gap between the lifting contact piece and the fixed contact piece, which leads to poor contact of the line.

[0004] The existing safety protection device only applies resistance to the rotation of the knife switch through the elastic force of the spring to keep the knife switch open or closed. However, during the inspection process, once the knife switch contacts other objects or the operator touches the knife switch by mistake, the manual knife switch will still be closed, and the positioning spring will keep the knife switch closed, which will still affect the normal connection of the circuit. Summary of the invention

[0005] In view of the above problems, a high and low voltage distribution cabinet with circuit safety protection function is provided. The damping rod, pushing device, intermittent propulsion mechanism and auxiliary mechanism in the mounting base solve the problem that the traditional installation protection device is accidentally touched during maintenance and causes the gate to close.

[0006] In order to solve the problems of the prior art, the present invention provides a high and low voltage power distribution cabinet with circuit safety protection function, comprising a main seat arranged in the power distribution cabinet, and a pushing device, an intermittent pushing mechanism and an auxiliary mechanism arranged in the main seat; the main seat is provided with terminals for inputting and outputting electric energy respectively, and the main seat is provided with a fixed contact piece and a movable contact piece respectively connected with the two terminals, and the movable contact piece can be lifted and lowered and arranged on the main seat; a lifting and lowering connecting frame is arranged in the main seat, and a sensing push rod is located above the connecting frame; the pushing device comprises a connecting cylinder and a switch; the connecting cylinder is arranged on the main seat, and the connecting cylinder An induction coil is wound on it, an induction push rod is arranged on the connecting cylinder which can be raised and lowered, and a first elastic member connected with the induction push rod is arranged in the connecting cylinder; the knife is rotatably arranged on the main seat, the knife is transmission-connected with the movable contact piece and the connecting frame, and when the knife pulls the connecting frame, the intermittent propulsion mechanism controls the connecting frame to move intermittently; a damping rod for controlling the reset of the knife is arranged in the main seat; the auxiliary mechanism comprises a fixing assembly and a first control assembly, the fixing assembly is used to fix the connecting frame when the connecting frame is in a descending state, and the first control assembly is used to release the movement restriction of the connecting frame by the fixing assembly.

[0007] Preferably, a connecting shaft is provided on the knife; a push frame is slidably installed in the main seat, a guide groove is provided on the push frame, and the connecting shaft and the guide groove are slidably matched; a second elastic member is provided on the push frame, and the second elastic member is connected to the connecting frame.

[0008] Preferably, the intermittent propulsion mechanism includes a first mounting seat, a second mounting seat, a first vertical pole, a first clamping assembly, a second clamping assembly and a second control assembly; an extension rod and a third elastic member are provided on the first mounting seat, the extension rod is slidably matched with the second mounting seat, and the two ends of the third elastic member are respectively connected to the first mounting seat and the second mounting seat; the second mounting seat is connected to the connecting frame; the first vertical pole is arranged in the main seat, and the first mounting seat and the second mounting seat are slidably matched with the first vertical pole; the first clamping assembly and the second clamping assembly are respectively arranged on the first mounting seat and the second mounting seat, and the first clamping assembly and the second clamping assembly are respectively used to control the clamping of the first mounting seat and the second mounting seat with the first vertical pole; the second control assembly is used to control the connection and disconnection of the first clamping assembly and the second clamping assembly.

[0009] Preferably, the first clamping assembly includes a first clamping block and a first spring; the second clamping assembly includes a second clamping block and a second spring; the first clamping block and the second clamping block are respectively slidably mounted on the first mounting seat and the second mounting seat; the two ends of the first spring are respectively connected to the first clamping block and the first mounting seat, and the two ends of the second spring are respectively connected to the second clamping block and the second mounting seat; at least three first clamping grooves are opened on the first vertical pole, and the multiple first clamping grooves are equidistantly distributed along the extension direction of the first vertical pole.

[0010] Preferably, the second control component includes a first clip-on plate, which is mounted on a first mounting seat; a second through groove is provided on the second mounting seat for the first clip-on plate to pass through; a second oblique groove is provided on the second clamping block; in a working state, when the first mounting seat abuts against the second mounting seat, the second oblique groove on the second clamping block is in a contracted state under the extrusion of the first clip-on plate.

[0011] Preferably, the second control component includes a first bracket and a second clip plate; the first bracket is connected to the second mounting seat, and the first bracket and the first mounting seat are slidably matched; the second clip plate is connected to the first bracket, and the second clip plate is located above the first mounting seat; a first oblique groove is provided on the first clamping block, and a first through groove for the second clip plate to pass through is provided on the first mounting seat.

[0012] Preferably, the fixing assembly includes an extension block, a third clamping block, a third spring and a second vertical pole; the extension block is arranged on the connecting frame; the third clamping block is slidably installed on the extension block; the two ends of the third spring are respectively connected to the third clamping block and the extension block; the second vertical pole is arranged in the main seat, and a second clamping groove cooperating with the third clamping block is opened on the second vertical pole.

[0013] Preferably, the first control assembly includes a third clamping plate, a push plate and a guide rod; the third clamping plate is slidably mounted on the extension block; the push plate and the guide rod are arranged on the third clamping plate; and the guide rod is slidably matched with the extension block.

[0014] Preferably, an unlocking assembly is provided in the main seat, and the unlocking assembly includes a mounting bar and a linear drive; the mounting bar is slidably mounted on the first vertical pole, and a filling block for filling the first card slot is provided on the mounting bar; the linear drive is mounted on the first vertical pole, and the linear drive is used to drive the mounting bar to slide.

[0015] Preferably, a damping assembly for limiting the descent of the push frame is provided in the main seat, and the damping assembly includes a second bracket, a guide bar, a third bracket, a rotation driver and a screw; the second bracket and the guide bar are both arranged in the main seat, and the push frame and the guide bar are slidably matched; the third bracket is slidably mounted on the second bracket, and an elastic band is provided on the third bracket; the rotation driver is arranged on the second bracket, and the rotation driver is used to drive the screw to rotate; the screw is rotationally arranged on the second bracket, and the screw is threadedly connected to the push plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention can realize the function of manual or automatic circuit breaking through the damping rod, the pushing device, the intermittent propulsion mechanism and the auxiliary mechanism in the mounting seat, and when the circuit is manually broken, the operator needs to maintain the closing action for a period of time before the circuit can be broken for a long time, so as to avoid the circuit breaking operation caused by accidentally touching the knife. When manually breaking the circuit, the operator needs to manually close the knife, and use the thrust provided by the operator to overcome the resistance of the damping rod to rotate the knife, and the knife drives the movable contact piece to descend, so that the movable contact piece is disconnected from the fixed contact piece, and the power-off operation is quickly realized. And after breaking the circuit, the operator needs to maintain for a period of time so that the knife can pull the connecting frame downward through the intermittent propulsion mechanism until the connecting frame is fixed by the fixed component, and the knife is restricted to reset by the connecting frame. Otherwise, the knife will reset under the elastic force of the damping rod, and the movable contact piece will abut against the fixed contact piece again to complete the circuit connection. Avoid the situation where the operator accidentally touches the gate during the maintenance process and causes the gate to close. Once a current surge occurs, the induction coil on the connecting tube generates an enhanced induced magnetic field when the current increases. The magnetic force generated by the magnetic field overcomes the elastic force of the first elastic member to push the induction push rod out. After the induction push rod contacts the connecting frame, it pushes the connecting frame downward. The connecting frame directly pushes the knife switch to rotate and drives the movable contact piece to descend. When the connecting frame is in the downward state, the fixing assembly fixes the connecting frame and limits the knife switch through the connecting frame to prevent the knife switch from resetting under the elastic force of the damping rod, thereby quickly completing the power-off operation.

[0018] 2. The connecting shaft, the push frame and the second elastic member of the present invention realize the function of pulling the connecting frame to move through the knife. When the operator manually closes the knife, the knife is pushed to rotate downward, and the knife pushes the push frame downward through the connecting shaft, and the damping rod contracts under the thrust. The push frame pulls the connecting frame downward through the piston rod of the second elastic member, and the induction coil on the connecting cylinder is not affected by the large current. During the downward movement, the connecting frame will be affected by the intermittent propulsion mechanism and move downward intermittently, thereby controlling the downward movement speed of the connecting frame.

[0019] 3. The present invention realizes the function of controlling the intermittent downward movement of the connecting frame when the connecting frame is subjected to a downward pull through the first mounting seat, the second mounting seat, the first vertical rod, the first clamping assembly and the second clamping assembly. The intermittent downward movement of the connecting frame is realized by controlling the alternating clamping of the first clamping assembly and the second clamping assembly through the control assembly, thereby controlling the downward movement speed of the connecting frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of a high and low voltage distribution cabinet with circuit safety protection function.

[0021] Figure 2 It is a three-dimensional schematic diagram of two main sockets in a high and low voltage distribution cabinet with circuit safety protection function.

[0022] Figure 3 The invention is a three-dimensional schematic diagram showing the internal structure of the main seat in a high and low voltage power distribution cabinet with circuit safety protection function in a reset state.

[0023] Figure 4 It is a three-dimensional schematic diagram of the main seat in a high and low voltage distribution cabinet with circuit safety protection function in a power-off state.

[0024] Figure 5 The invention is a three-dimensional schematic diagram of a high and low voltage power distribution cabinet with circuit safety protection function, in which the main seat is closed and the connecting frame is in the process of descending.

[0025] Figure 6 The present invention is a three-dimensional schematic diagram of an intermittent propulsion mechanism in a high and low voltage distribution cabinet with circuit safety protection function.

[0026] Figure 7 The invention discloses a three-dimensional schematic diagram of a first mounting seat and a second mounting seat in a high-low voltage power distribution cabinet with circuit safety protection function when they are in contact with each other.

[0027] Figure 8 The invention discloses a stereoscopic schematic diagram showing a first mounting seat and a second mounting seat in a high and low voltage power distribution cabinet with circuit safety protection function when a first clamping block is in a retracted state.

[0028] Fig. 9 The invention discloses a three-dimensional exploded schematic diagram of a first mounting seat and a second mounting seat in a high- and low-voltage power distribution cabinet with circuit safety protection function.

[0029] Fig.10 It is a three-dimensional schematic diagram of auxiliary mechanisms in a high and low voltage distribution cabinet with circuit safety protection function.

[0030] Fig.11 It is a three-dimensional exploded schematic diagram of the auxiliary mechanism in a high and low voltage distribution cabinet with circuit safety protection function.

[0031] Fig.12 The invention is a three-dimensional exploded schematic diagram of an unlocking component in a high- and low-voltage power distribution cabinet with circuit safety protection function.

[0032] Fig.13 The invention is a three-dimensional schematic diagram of the coordination of a damping component, a connecting shaft and a push frame in a high and low voltage distribution cabinet with circuit safety protection function.

[0033] The numbers in the figure are: 1-cabinet; 2-main seat; 21-terminal; 22-fixed contact piece; 23-movable contact piece; 24-connecting frame; 25-damping rod; 3-pushing device; 31-connecting cylinder; 311-sensing push rod; 312-first elastic member; 32-switch knife; 321-connecting shaft; 322-pushing frame; 323-second elastic member; 33-damping assembly; 331-second bracket; 332-guide strip; 333-third bracket; 3331-elastic belt; 334-rotating drive; 335-screw; 4-intermittent propulsion mechanism; 41-first mounting seat; 411-extension rod; 412-third elastic member; 413-first through slot; 42-second mounting seat; 421-second through slot; 43-first vertical pole; 431-first card slot ;44-first clamping assembly;441-first clamping block;4411-first inclined slot;442-first spring;45-second clamping assembly;451-second clamping block;4511-second inclined slot;452-second spring;46-second control assembly;461-first clamping plate;462-first bracket;453-second clamping plate;47-unlocking assembly;471-mounting strip;4711-filling block;472-linear drive;5-auxiliary mechanism;51-fixing assembly;511-extension block;512-third clamping block;5121-third inclined slot;513-third spring;514-second vertical pole;5141-second clamping slot;52-first control assembly;521-third clamping plate;522-push plate;523-guide rod. DETAILED DESCRIPTION

[0034] 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.

[0035] Reference Figure 1-Figure 5A high and low voltage power distribution cabinet with circuit safety protection function, including a main seat 2 arranged in the power distribution cabinet, and a pushing device 3, an intermittent pushing mechanism 4 and an auxiliary mechanism 5 are arranged in the main seat 2; the main seat 2 is provided with terminals 21 for inputting and outputting electric energy respectively, and the main seat 2 is provided with fixed contacts 22 and movable contacts 23 respectively connected with the two terminals 21, and the movable contacts 23 can be lifted and lowered and arranged on the main seat 2; a lifting and lowering connecting frame 24 is arranged in the main seat 2, and an induction push rod 311 is located above the connecting frame 24; the pushing device 3 includes a connecting cylinder 31 and a switch 32; the connecting cylinder 31 is arranged on the main seat 2, and an induction coil is wound on the connecting cylinder 31, and the connecting cylinder 31 is provided with an induction coil. An induction push rod 311 is provided which can be raised and lowered, and a first elastic member 312 connected to the induction push rod 311 is provided in the connecting tube 31; the knife gate 32 is rotatably provided on the main seat 2, and the knife gate 32 is transmission-connected with the movable contact piece 23 and the connecting frame 24, and when the knife gate 32 pulls the connecting frame 24, the intermittent propulsion mechanism 4 controls the connecting frame 24 to move intermittently; a damping rod 25 for controlling the reset of the knife gate 32 is provided in the main seat 2; the auxiliary mechanism 5 includes a fixing component 51 and a first control component 52, the fixing component 51 is used to fix the connecting frame 24 when the connecting frame 24 is in a descending state, and the first control component 52 is used to release the movement restriction of the fixing component 51 on the connecting frame 24.

[0036] The present invention can realize the function of manual or automatic circuit breaking through the damping rod 25, the pushing device 3, the intermittent propulsion mechanism 4 and the auxiliary mechanism 5 in the main seat 2, and when manually disconnecting, the operator needs to maintain the closing action for a period of time before the circuit breaker can be disconnected for a long time, so as to avoid the circuit breaking operation caused by accidentally touching the switch blade 32. The cabinet 1 of the power distribution cabinet is provided with a transformer and at least two main seats 2, and the fixed contact piece 22 is connected to the main seat 2. When manually disconnecting, the operator needs to manually close the switch blade 32, and the thrust provided by the operator overcomes the resistance of the damping rod 25 to rotate the switch blade 32, and the switch blade 32 drives the movable contact piece 23 to descend, so that the movable contact piece 23 is disconnected from the fixed contact piece 22, and the power-off operation is quickly realized. And after disconnecting, the operator needs to maintain for a period of time, so that the switch blade 32 can pull the connecting frame 24 downward through the intermittent propulsion mechanism 4, until the connecting frame 24 is fixed by the fixing component 51, and the switch blade 32 is restricted from resetting through the connecting frame 24. Otherwise, the knife switch 32 will reset under the elastic force of the damping rod 25, and the movable contact piece 23 will contact the fixed contact piece 22 again to complete the circuit connection. This prevents the operator from accidentally touching the gate during the maintenance process and causing it to close. Once the current surges, the induction coil on the connecting tube 31 generates an enhanced induced magnetic field when the current increases. The magnetic force generated by the magnetic field overcomes the elastic force of the first elastic member 312 to push the induction push rod 311 out. After the induction push rod 311 contacts the connecting frame 24, it pushes the connecting frame 24 downward. The connecting frame 24 directly pushes the knife switch 32 to rotate and drives the movable contact piece 23 to descend. When the connecting frame 24 is in the downward state, the fixing assembly 51 fixes the connecting frame 24 and limits the knife switch 32 through the connecting frame 24 to prevent the knife switch 32 from resetting under the elastic force of the damping rod 25 and quickly complete the power-off operation.

[0037] Reference Figure 3-Figure 5 : The knife 32 is provided with a connecting shaft 321; a push frame 322 is slidably installed in the main seat 2, and the push frame 322 is provided with a guide groove, and the connecting shaft 321 slides with the guide groove; the push frame 322 is provided with a second elastic member 323, and the second elastic member 323 is connected to the connecting frame 24.

[0038] The present invention realizes the function of pulling the connecting frame 24 to move through the knife gate 32 through the connecting shaft 321, the push frame 322 and the second elastic member 323. The second elastic member 323 is preferably a nitrogen spring, and the piston rod of the nitrogen spring is connected to the connecting frame 24. When the operator manually closes the knife gate 32, the knife gate 32 is pushed to rotate downward, and the knife gate 32 pushes the push frame 322 to move downward through the connecting shaft 321, and the damping rod 25 contracts under the thrust. The push frame 322 pulls the connecting frame 24 downward through the piston rod of the second elastic member 323, and the induction coil on the connecting cylinder 31 is not affected by the large current. The connecting frame 24 will be affected by the intermittent propulsion mechanism 4 during the downward movement and intermittently move downward, thereby controlling the downward movement speed of the connecting frame 24. After the operator manually closes the knife gate 32, the operator needs to maintain the closing action until the connecting frame 24 completes the downward movement. Only after the fixing assembly 51 fixes the connecting frame 24 can the connecting frame 24 prevent the push frame 322 and the knife gate 32 from resetting under the elastic force of the damping rod 25.

[0039] Reference Figure 3 , Figure 6-Figure 8 : The intermittent propulsion mechanism 4 includes a first mounting seat 41, a second mounting seat 42, a first vertical rod 43, a first clamping assembly 44, a second clamping assembly 45 and a second control assembly 46; an extension rod 411 and a third elastic member 412 are provided on the first mounting seat 41, the extension rod 411 is slidably matched with the second mounting seat 42, and the two ends of the third elastic member 412 are respectively connected to the first mounting seat 41 and the second mounting seat 42; the second mounting seat 42 is connected to the connecting frame 24; the first vertical rod 43 is arranged in the main seat 2, and the first mounting seat 41 and the second mounting seat 42 are slidably matched with the first vertical rod 43; the first clamping assembly 44 and the second clamping assembly 45 are respectively arranged on the first mounting seat 41 and the second mounting seat 42, and the first clamping assembly 44 and the second clamping assembly 45 are respectively used to control the first mounting seat 41 and the second mounting seat 42 to clamp with the first vertical rod 43; the second control assembly 46 is used to control the connection and disconnection of the first clamping assembly 44 and the second clamping assembly 45.

[0040] The present invention realizes the function of controlling the intermittent downward movement of the connecting frame 24 when the connecting frame 24 is subjected to a downward pull through the first mounting seat 41, the second mounting seat 42, the first vertical rod 43, the first clamping assembly 44 and the second clamping assembly 45. When the induction coil on the connecting cylinder 31 is not affected by the large current, and when the push frame 322 pulls the connecting frame 24 downward through the piston rod of the second elastic member 323, the connecting frame 24 drives the second mounting seat 42 downward. At this time, the first mounting seat 41 is clamped with the first vertical rod 43 through the first clamping assembly 44 to limit the movement of the first mounting seat 41, and the third elastic member 412 is stretched under the pulling action of the second mounting seat 42. When the second mounting seat 42 moves to the specified position, the second clamping assembly 45 is clamped with the first vertical rod 43 to limit the downward movement of the second mounting seat 42 and the connecting frame 24. When the distance between the first mounting seat 41 and the second mounting seat 42 reaches a specified value, the second control component 46 releases the clamping state of the first clamping component 44, and the first mounting seat 41 moves toward the second mounting seat 42 under the elastic force of the third elastic member 412, and the movement of the first mounting seat 41 is guided by the extension rod 411 and the first vertical rod 43. When the first mounting seat 41 abuts against the second mounting seat 42, the second control component 46 releases the clamping state of the second clamping component 45, and the second mounting seat 42 and the connecting frame 24 move downward under the elastic force of the second elastic member 323. The second control component 46 controls the alternating clamping of the first clamping component 44 and the second clamping component 45, so as to realize the intermittent downward movement of the connecting frame 24, thereby controlling the downward movement speed of the connecting frame 24.

[0041] Reference Figure 7-Figure 9 : The first clamping assembly 44 includes a first clamping block 441 and a first spring 442; the second clamping assembly 45 includes a second clamping block 451 and a second spring 452; the first clamping block 441 and the second clamping block 451 are slidably installed on the first mounting seat 41 and the second mounting seat 42 respectively; the two ends of the first spring 442 are respectively connected to the first clamping block 441 and the first mounting seat 41, and the two ends of the second spring 452 are respectively connected to the second clamping block 451 and the second mounting seat 42; at least three first clamping grooves 431 are opened on the first vertical pole 43, and the multiple first clamping grooves 431 are equidistantly distributed along the extension direction of the first vertical pole 43.

[0042] The present invention realizes the function of controlling the first mounting seat 41 and the second mounting seat 42 to alternately engage with the first vertical rod 43 through the first clamping block 441, the first spring 442, the second clamping block 451, the second spring 452 and the first clamping groove 431. When the induction coil on the connecting cylinder 31 is not affected by the large current, and the push frame 322 pulls the connecting frame 24 downward through the piston rod of the second elastic member 323, the connecting frame 24 drives the second mounting seat 42 downward. At this time, the first clamping block 441 on the first mounting seat 41 is engaged with the first clamping groove 431 on the first vertical rod 43 under the elastic force of the first spring 442, limiting the movement of the first mounting seat 41, and the third elastic member 412 is elongated under the pulling action of the second mounting seat 42. When the second mounting seat 42 moves to the specified position, the second clamping block 451 on the second mounting seat 42 is engaged with the next first clamping groove 431 on the first vertical rod 43, limiting the downward movement of the second mounting seat 42 and the connecting frame 24. At this time, the distance between the first mounting seat 41 and the second mounting seat 42 is the same as the distance between two adjacent first card slots 431. The second control component 46 controls the first card block 441 to separate from the first card slot 431, thereby releasing the movement restriction of the first mounting seat 41. The first mounting seat 41 moves toward the second mounting seat 42 under the elastic force of the third elastic member 412. When the first mounting seat 41 abuts against the second mounting seat 42, the second control component 46 controls the second clamping block 451 to separate from the first clamping slot 431, thereby releasing the movement restriction of the second mounting seat 42. The second mounting seat 42 and the connecting frame 24 move downward under the elastic force of the second elastic member 323. When the first clamping block 441 on the first mounting seat 41 moves to the first clamping slot 431 where the original second clamping block 451 is clamped, the first clamping block 441 is clamped with the first clamping slot 431 under the elastic force of the first spring 442, and the second mounting seat 42 continues to move downward until it moves to the next first clamping slot 431 and stops moving under the restriction of the second clamping component 45.

[0043] Reference Figure 8 The second control component 46 includes a first clamping plate 461, which is mounted on the first mounting seat 41; a second through groove 421 is provided on the second mounting seat 42 for the first clamping plate 461 to pass through; a second inclined groove 4511 is provided on the second clamping block 451; in the working state, when the first mounting seat 41 abuts against the second mounting seat 42, the second inclined groove 4511 on the second clamping block 451 is in a contracted state under the squeezing action of the first clamping plate 461.

[0044] The present invention controls the second clamping block 451 to shrink when the first mounting seat 41 abuts against the second mounting seat 42 through the first clamping plate 461, the second through slot 421 and the second oblique slot 4511, so as to achieve the effect of releasing the movement restriction of the second mounting seat 42. In the process of the intermittent propulsion mechanism 4 controlling the intermittent movement of the connecting frame 24, when the first mounting seat 41 and the second mounting seat 42 are close to each other, the first clamping plate 461 on the first mounting seat 41 passes through the second through slot 421 on the second mounting seat 42. After the first clamping plate 461 contacts the second oblique slot 4511 on the second clamping block 451, the inclined surface of the second oblique slot 4511 is squeezed, and the second spring 452 shrinks under the squeezing action, thereby pushing the second clamping block 451 to shrink. When the first mounting seat 41 abuts against the second mounting seat 42, the second oblique slot 4511 on the second clamping block 451 is in a shrinking state under the squeezing action of the first clamping plate 461, so as to release the movement restriction of the second mounting seat 42.

[0045] Reference Figure 7-Figure 9 : The second control component 46 includes a first bracket 462 and a second clamping plate 453; the first bracket 462 is connected to the second mounting seat 42, and the first bracket 462 is slidably matched with the first mounting seat 41; the second clamping plate 453 is connected to the first bracket 462, and the second clamping plate 453 is located above the first mounting seat 41; a first inclined groove 4411 is provided on the first clamping block 441, and a first through groove 413 for the second clamping plate 453 to pass through is provided on the first mounting seat 41.

[0046] The present invention controls the first clamping block 441 to retract when the distance between the first mounting seat 41 and the second mounting seat 42 reaches a specified value through the first bracket 462, the second clamping plate 453, the first inclined groove 4411 and the first through groove 413, so as to release the movement restriction of the first mounting seat 41. In the process of the intermittent propulsion mechanism 4 controlling the intermittent movement of the connecting frame 24, when the first clamping block 441 on the first mounting seat 41 is clamped with the first clamping groove 431, the second mounting seat 42 and the connecting frame 24 move downward under the elastic force of the second elastic member 323. The second mounting seat 42 drives the first bracket 462 and the second clamping plate 453 to move downward, and the second clamping plate 453 contacts the first inclined groove 4411 of the first clamping block 441 and squeezes the first clamping block 441. The first spring 442 shrinks under the squeezing force. When the second mounting seat 42 moves to the next first clamping groove 431, the distance between the first mounting seat 41 and the second mounting seat 42 reaches a specified value. The first clamping block 441 is in a contracted state under the squeezing action of the second clamping plate 453, and the first clamping block 441 is separated from the first clamping groove 431, thereby releasing the movement restriction of the first mounting seat 41.

[0047] Reference Figure 3-Figure 5 , Fig.10 and Fig.11The fixing assembly 51 comprises an extension block 511, a third clamping block 512, a third spring 513 and a second vertical rod 514; the extension block 511 is arranged on the connecting frame 24; the third clamping block 512 is slidably mounted on the extension block 511; the two ends of the third spring 513 are respectively connected to the third clamping block 512 and the extension block 511; the second vertical rod 514 is arranged in the main seat 2, and a second clamping groove 5141 cooperating with the third clamping block 512 is opened on the second vertical rod 514.

[0048] The present invention realizes the function of fixing the connecting frame 24 when the connecting frame 24 is in a downward movement state through the extension block 511, the third clamping block 512, the third spring 513 and the second vertical rod 514. The top of the second vertical rod 514 is provided with an oblique notch for guiding the movement of the third clamping block 512. During the downward movement of the connecting frame 24, the extension block 511 is driven to move, and the extension block 511 drives the third clamping block 512 to move. When the third clamping block 512 contacts the oblique notch at the top of the second vertical rod 514, the third clamping block 512 is squeezed, and the third spring 513 contracts under the squeezing action until the third clamping block 512 is aligned with the second clamping groove 5141. The third clamping block 512 is clamped with the second clamping groove 5141 under the elastic force of the third spring 513, and then the movement of the connecting frame 24 is restricted.

[0049] Reference Figure 3-Figure 5 , Fig.10 and Fig.11 : The first control assembly 52 includes a third clamping plate 521, a push plate 522 and a guide rod 523; the third clamping plate 521 is slidably mounted on the extension block 511; the push plate 522 and the guide rod 523 are arranged on the third clamping plate 521; the guide rod 523 is slidably matched with the extension block 511.

[0050] The present invention realizes the function of removing the movement restriction of the fixing component 51 on the connecting frame 24 through the third clamping plate 521, the push plate 522 and the guide rod 523. After the power is turned off, the operator inspects the electrical components in the power distribution cabinet. After the inspection is completed, the operator presses the push plate 522, and the push plate 522 drives the third clamping plate 521 to move downward, and guides the third clamping plate 521 through the guide rod 523, so that the third clamping plate 521 can stably squeeze the third inclined groove 5121 on the third clamping block 512, thereby making the third clamping block 512 in a contracted state. The push frame 322 is reset under the elastic force of the damping rod 25, and during the reset process, the push frame 322 supports the connecting frame 24 and props up the connecting frame 24.

[0051] Reference Figure 6 and Fig.12: An unlocking assembly 47 is provided in the main seat 2, and the unlocking assembly 47 includes a mounting strip 471 and a linear driver 472; the mounting strip 471 is slidably mounted on the first vertical pole 43, and a filling block 4711 for filling the first card slot 431 is provided on the mounting strip 471; the linear driver 472 is installed on the first vertical pole 43, and the linear driver 472 is used to drive the mounting strip 471 to slide.

[0052] The present invention can simultaneously release the movement restriction of the first mounting seat 41 and the second mounting seat 42 by the first clamping assembly 44 and the second clamping assembly 45 through the mounting bar 471 and the linear driver 472. A controller for human-machine interaction is provided on the main seat 2. The linear driver 472 is preferably a micro electric push rod, and the linear driver 472 is electrically connected to the controller. When the current of the induction coil on the connecting cylinder 31 increases, the magnetic field increases, and then the magnetic force overcomes the elastic force of the first elastic member 312 to push the induction push rod 311 out. At the same time, when the controller senses the increase in current, it sends a signal to the linear driver 472, and the linear driver 472 drives the mounting bar 471 to move, and the mounting bar 471 drives the filling block 4711 to move toward the first card slot 431, and the first card slot 431 is filled by the filling block 4711, and then the first card block 441 and the second card block 451 are both pushed out of the first card slot 431, so as to prevent the first clamping assembly 44 and the second clamping assembly 45 from hindering the movement of the connecting frame 24. The connecting frame 24 rapidly descends under the pushing action of the sensing push rod 311, and pushes the pushing frame 322 to move downward synchronously. The pushing frame 322 pushes the connecting shaft 321 on the knife switch 32, thereby pushing the knife switch 32 to rotate. At the same time, the pushing frame 322 also pushes the movable contact piece 23 downward to quickly complete the power-off operation.

[0053] Reference Figure 3 , Figure 5 and Fig.13 : A damping assembly 33 for limiting the descent of the push frame 322 is provided in the main seat 2, and the damping assembly 33 includes a second bracket 331, a guide bar 332, a third bracket 333, a rotation driver 334 and a screw 335; the second bracket 331 and the guide bar 332 are both arranged in the main seat 2, and the push frame 322 and the guide bar 332 are slidably matched; the third bracket 333 is slidably installed on the second bracket 331, and an elastic band 3331 is provided on the third bracket 333; the rotation driver 334 is arranged on the second bracket 331, and the rotation driver 334 is used to drive the screw 335 to rotate; the screw 335 is rotatably arranged on the second bracket 331, and the screw 335 is threadedly connected to the push plate 522.

[0054] The present invention realizes the function of limiting the descent of the push frame 322 through the second bracket 331, the guide bar 332, the push plate 522, the rotary driver 334 and the screw 335. The rotary driver 334 is preferably a servo motor, and the servo motor is electrically connected to the controller. When the current of the induction coil on the connecting cylinder 31 exceeds the threshold value, the induction push rod 311 will not extend under the support of the damping rod 25. When the current of the induction coil on the connecting cylinder 31 exceeds the threshold value, but the current intensity does not reach the dangerous value that requires power off, the induction push rod 311 will expand and contract under the magnetic field force of the induction coil, and then cause the fixed contact piece 22 and the movable contact piece 23 to swing frequently. For this reason, a damping component 33 that limits the descent of the push frame 322 is provided. When a large current is transmitted, the elastic force provided by the elastic band 3331 prevents the induction push rod 311 and the push frame 322 from moving downward. When the current surges, the elastic band 3331 is deformed under the push of the push frame 322. After the fixing assembly 51 fixes the connecting frame 24, the controller sends a signal to the rotary driver 334, and the rotary driver 334 drives the screw rod 335 to rotate, thereby controlling the third bracket 333 to move downward, so as to prevent the elastic band 3331 from being stretched for a long time.

[0055] 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 high and low voltage distribution cabinet with circuit safety protection function, characterized in that: A main seat (2) is provided in the power distribution cabinet, and a pushing device (3), an intermittent pushing mechanism (4) and an auxiliary mechanism (5) are provided in the main seat (2); The main base (2) is provided with terminals (21) for inputting and outputting electric energy respectively, and the main base (2) is provided with fixed contacts (22) and movable contacts (23) respectively connected to the two terminals (21), and the movable contacts (23) are arranged on the main base (2) in a manner that they can be raised and lowered; A lifting and lowering connecting frame (24) is provided in the main seat (2), and the sensing push rod (311) is located above the connecting frame (24); The pushing device (3) comprises a connecting cylinder (31) and a knife (32); The connecting tube (31) is arranged on the main seat (2), and an induction coil is wound on the connecting tube (31). An induction push rod (311) is arranged on the connecting tube (31) so as to be able to rise and fall. A first elastic member (312) connected to the induction push rod (311) is arranged in the connecting tube (31); The switch blade (32) is rotatably arranged on the main seat (2), the switch blade (32) is transmission-connected with the movable contact piece (23) and the connecting frame (24), and when the switch blade (32) pulls the connecting frame (24), the intermittent propulsion mechanism (4) controls the connecting frame (24) to move intermittently; A damping rod (25) for controlling the reset of the knife switch (32) is provided in the main seat (2); The auxiliary mechanism (5) comprises a fixing component (51) and a first control component (52); the fixing component (51) is used to fix the connecting frame (24) when the connecting frame (24) is in a descending state; and the first control component (52) is used to release the movement restriction of the connecting frame (24) by the fixing component (51).

2. A high and low voltage distribution cabinet with circuit safety protection function according to claim 1, characterized in that: A connecting shaft (321) is provided on the knife gate (32); A push frame (322) is slidably mounted in the main seat (2), a guide groove is provided on the push frame (322), and the connecting shaft (321) is slidably matched with the guide groove; A second elastic member (323) is provided on the pushing frame (322), and the second elastic member (323) is connected to the connecting frame (24).

3. A high and low voltage distribution cabinet with circuit safety protection function according to claim 1 or 2, characterized in that: The intermittent propulsion mechanism (4) comprises a first mounting seat (41), a second mounting seat (42), a first vertical rod (43), a first clamping assembly (44), a second clamping assembly (45) and a second control assembly (46); An extension rod (411) and a third elastic member (412) are provided on the first mounting seat (41), the extension rod (411) is slidably matched with the second mounting seat (42), and two ends of the third elastic member (412) are respectively connected to the first mounting seat (41) and the second mounting seat (42); The second mounting seat (42) is connected to the connecting frame (24); The first vertical rod (43) is arranged in the main seat (2), and the first mounting seat (41) and the second mounting seat (42) are slidably matched with the first vertical rod (43); The first clamping assembly (44) and the second clamping assembly (45) are respectively arranged on the first mounting seat (41) and the second mounting seat (42), and the first clamping assembly (44) and the second clamping assembly (45) are respectively used to control the clamping of the first mounting seat (41) and the second mounting seat (42) with the first vertical pole (43); The second control component (46) is used to control the connection and disconnection of the first clamping component (44) and the second clamping component (45).

4. A high and low voltage distribution cabinet with circuit safety protection function according to claim 3, characterized in that: The first clamping assembly (44) comprises a first clamping block (441) and a first spring (442); The second clamping assembly (45) comprises a second clamping block (451) and a second spring (452); The first clamping block (441) and the second clamping block (451) are slidably mounted on the first mounting seat (41) and the second mounting seat (42) respectively; Two ends of the first spring (442) are respectively connected to the first clamping block (441) and the first mounting seat (41), and two ends of the second spring (452) are respectively connected to the second clamping block (451) and the second mounting seat (42); At least three first clamping grooves (431) are provided on the first vertical rod (43), and the plurality of first clamping grooves (431) are distributed at equal distances along the extension direction of the first vertical rod (43).

5. The high and low voltage distribution cabinet with circuit safety protection function according to claim 3 is characterized in that: The second control assembly (46) comprises a first clamping plate (461), and the first clamping plate (461) is mounted on the first mounting seat (41); The second mounting seat (42) is provided with a second through slot (421) for the first clamping plate (461) to pass through; The second clamping block (451) is provided with a second inclined groove (4511).

6. A high and low voltage distribution cabinet with circuit safety protection function according to claim 4, characterized in that: The second control assembly (46) comprises a first bracket (462) and a second clamping plate (453); The first bracket (462) is connected to the second mounting seat (42), and the first bracket (462) is slidably matched with the first mounting seat (41); The second clamping plate (453) is connected to the first bracket (462); The first clamping block (441) is provided with a first inclined groove (4411), and the first mounting seat (41) is provided with a first through groove (413) for the second clamping plate (453) to pass through.

7. A high and low voltage power distribution cabinet with circuit safety protection function according to claim 1, characterized in that: The fixing assembly (51) comprises an extension block (511), a third clamping block (512), a third spring (513) and a second vertical rod (514); The extension block (511) is arranged on the connecting frame (24); The third clamping block (512) is slidably mounted on the extension block (511); Two ends of the third spring (513) are respectively connected to the third clamping block (512) and the extension block (511); The second vertical rod (514) is arranged in the main seat (2), and a second clamping groove (5141) matching with the third clamping block (512) is provided on the second vertical rod (514).

8. A high and low voltage power distribution cabinet with circuit safety protection function according to claim 7, characterized in that: The first control assembly (52) comprises a third clamping plate (521), a push plate (522) and a guide rod (523); The third clamping plate (521) is slidably mounted on the extension block (511); The push plate (522) and the guide rod (523) are arranged on the third clamping plate (521); The guide rod (523) is slidably matched with the extension block (511).

9. A high and low voltage power distribution cabinet with circuit safety protection function according to claim 4, characterized in that: An unlocking assembly (47) is provided inside the main seat (2), and the unlocking assembly (47) comprises a mounting strip (471) and a linear drive (472); The mounting strip (471) is slidably mounted on the first vertical pole (43), and a filling block (4711) is provided on the mounting strip (471); The linear drive (472) is used to drive the mounting bar (471) to slide.

10. A high and low voltage power distribution cabinet with circuit safety protection function according to claim 2, characterized in that: A damping assembly (33) is provided in the main seat (2), and the damping assembly (33) comprises a second bracket (331), a guide bar (332), a third bracket (333), a rotation driver (334), and a screw rod (335); The second bracket (331) and the guide bar (332) are both arranged in the main seat (2), and the push bracket (322) and the guide bar (332) are slidably matched; The third bracket (333) is slidably mounted on the second bracket (331), and an elastic band (3331) is provided on the third bracket (333); The rotary driver (334) is disposed on the second bracket (331), and the rotary driver (334) is used to drive the screw rod (335) to rotate; The screw rod (335) is rotatably disposed on the second bracket (331), and the screw rod (335) is threadedly connected to the push plate (522).

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