A pull-out interlocking device and a ring main unit

Abstract

The application provides a lifting interlocking device and a ring main unit, which comprises an interlocking seat, an interlocking rod, an interlocking baffle, a locking rod assembly and an upper lifting assembly. The interlocking baffle and the interlocking rod are oppositely and spacedly arranged and the lower ends of the interlocking baffle and the interlocking rod penetrate through the interlocking seat. The upper end of the interlocking rod corresponds to a grounding switch operating rod. A cam is arranged on the grounding switch operating rod and can abut against the upper end of the interlocking rod. The lower end of the interlocking rod is connected with a first pull rope. The tail end of the first pull rope is connected with the locking rod assembly and is used for pulling the locking rod assembly to move. The lower end of the interlocking baffle is connected with a second pull rope. The tail end of the second pull rope is connected with the upper lifting assembly. A first reset spring is arranged on the interlocking rod and is used for driving the interlocking rod to move upward and reset. A second reset spring is arranged on the interlocking baffle and is used for driving the interlocking baffle to move downward and block the grounding switch operating rod. The application realizes that the interlocking transmission is not limited by distance and direction and improves the reliability of the interlocking function.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ring main unit, and particularly relates to a lifting interlocking device and a ring main unit. BACKGROUND

[0002] In a power transmission and distribution system, a ring main unit is a very important electrical device in the power system. Once misoperation occurs, it may cause damage to the device, or even cause a power system failure. It has been proven that it is difficult to prevent misoperation accidents from happening simply by relying on rules and regulations to restrict human operation. Therefore, the regulations require that the ring main unit must have perfect and reliable "five-prevention" functions to ensure the safe operation of the power grid and the personal safety.

[0003] The ring main unit generally has three switch positions, namely closing, opening and grounding. Before use, the ring main unit is generally in the grounding position. To supply power to the ring main unit, the grounding operation must be performed first, that is, the ring main unit is operated to the opening position, and then the ring main unit is operated to the closing position, that is, the power supply is completed. When the ring main unit is running, the cable test door must be closed, and the live body is enclosed in the cable test compartment to protect personal safety. When the cable test door is opened, the grounding switch cannot be operated to open.

[0004] The utility model with publication number CN208954889U discloses an interlocking mechanism and a ring main unit, which comprises an interlocking plate, an opening plate, an interlocking support, an interlocking rod, an interlocking hanging plate, a reset mechanism and a guide mechanism. The upper and lower ends of the interlocking rod are connected with the interlocking support and the interlocking hanging plate respectively. The opening plate is arranged on the interlocking support, and the interlocking plate is arranged above the opening plate and in contact with the opening plate. When the interlocking plate rotates around the fixed point, the interlocking support, the interlocking rod and the interlocking hanging plate will move up and down in the vertical direction through the opening plate, the reset mechanism and the guide mechanism. Although the interlocking mechanism realizes the interlocking of the grounding switch and the cable test door, it can only be used for specific structure arrangement, and has strict requirements for the distance and direction of interlocking transmission. When the structure size and assembly of the parts have errors, it is difficult to ensure the reliability of the interlocking function. SUMMARY

[0005] The present application aims to solve the defects in the prior art and provides a lifting interlocking device and a ring main unit, which realizes interlocking transmission without distance and direction restrictions and improves the reliability of the interlocking function.

[0006] To achieve the above object, the present application provides a lifting interlocking device, comprising an interlocking seat, an interlocking rod, an interlocking baffle, a locking rod assembly and an upper top assembly, the interlocking baffle and the interlocking rod are oppositely spaced and the lower ends of both penetrate the interlocking seat, the upper end of the interlocking rod corresponds to a grounding switch operating rod, the grounding switch operating rod is provided with a cam, the cam can abut against the upper end of the interlocking rod, the lower end of the interlocking rod is connected with a first pull rope, the end of the first pull rope is connected with the locking rod assembly, for pulling the locking rod assembly to move, the lower end of the interlocking baffle is connected with a second pull rope, the end of the second pull rope is connected with the upper top assembly, the interlocking rod is provided with a first reset spring, for driving the interlocking rod to move upward to reset, the interlocking baffle is provided with a second reset spring, for driving the interlocking baffle to move downward to block the grounding switch operating rod.

[0007] In the present application, the first pull rope and the second pull rope are used as the main transmission mode of interlocking, so that the interlocking transmission is not limited by direction and distance, and the problem of unstable interlocking function caused by assembly and machining errors is avoided, thereby greatly improving the work efficiency and the reliability of the equipment; by arranging the interlocking baffle, the interlocking rod, the locking rod assembly and the upper top assembly and connecting them in series through the first pull rope and the second pull rope, the linkage cooperation between the components is realized, and the interlocking effect is realized.

[0008] Optionally, the locking rod assembly comprises a locking seat, a locking rod body, a fixed plate and a first pipe opening, the locking seat is provided with a through hole, the locking rod body is movably arranged in the through hole, the side surface of the locking rod body is provided with the fixed plate, and the first pipe opening is fixedly arranged on the locking seat, the end of the first pull rope is arranged in the first pipe opening and connected with the fixed plate, the abutment of the cam against the interlocking rod downward can tighten the first end of the first pull rope, and the end of the first pull rope pulls the locking rod body to move axially to lock.

[0009] In the present application, the first pipe opening is used to provide mounting support for the first pull rope, and the tightening or relaxation of the first pull rope can drive the locking rod body to move axially on the locking seat through the fixed plate, so as to realize the locking or unlocking effect.

[0010] Optionally, the locking seat is a "J" type frame structure, the through holes are arranged on the two opposite side surfaces of the locking seat, the locking rod body is arranged in the two through holes, and a strip-shaped hole is arranged on the top surface of the locking seat along the length direction of the locking rod body, the lower end of the fixed plate extends into the strip-shaped hole and is connected with the side surface of the locking rod body.

[0011] In the present application, the locking seat is arranged as a "J" type frame structure, which can reduce the production cost under the premise of ensuring the normal function of the locking seat, and facilitates the hole processing.

[0012] Optionally, the upper top assembly comprises a top plate base, a top plate body and a lock plate, the top plate body is vertically movably arranged on the top plate base, the lock plate is fixedly arranged at the lower end of the top plate body, a first lock hole is formed on the lock plate and matched with the lock rod, a second pipe opening is arranged on the side of the top plate base, the end of the second pull rope extends downward to the top plate body, is bent upward, is arranged in the second pipe opening and is connected with the top plate body, a third reset spring is arranged between the upper part of the top plate body and the upper part of the top plate base.

[0013] In the application, the top plate base is used to provide a mounting base for the top plate body, the top plate body can move downward under the action of the second pull rope, and the top plate body moves upward and resets under the action of the third reset spring when the second pull rope releases the tension on the top plate body.

[0014] Optionally, two first through holes are vertically and spaced apart arranged on the side of the top plate base, two long strip holes are vertically and spaced apart arranged on the side of the top plate body, the positions of the two first through holes and the two long strip holes are one-to-one corresponding, a mounting shaft is arranged in the first through hole and the corresponding long strip hole, and the long strip hole and the corresponding mounting shaft can vertically move.

[0015] In the application, the position of the mounting shaft and the corresponding first through hole is fixed, the mounting shaft and the corresponding long strip hole can vertically move under the action of the second pull rope and the third reset spring, and the distance between the top plate body and the top plate base remains unchanged due to the positioning effect of the mounting shaft, thereby ensuring the stable movement of the top plate body.

[0016] Optionally, the pull type interlocking device further comprises a pipe opening mounting plate, a third pipe opening, a fourth pipe opening and a connecting piece, the pipe opening mounting plate is arranged below the interlocking base, the lower end of the interlocking block and the interlocking rod both passes through the pipe opening mounting plate, the connecting piece is fixedly embedded in the lower end of the interlocking rod, the third pipe opening and the fourth pipe opening pass through and are fixedly arranged on the pipe opening mounting plate, the positions of the third pipe opening, the fourth pipe opening, the interlocking block and the interlocking rod are spaced apart, the first end of the first pull rope is connected with the connecting piece, and the first end of the second pull rope is connected with the lower end of the interlocking block.

[0017] In the application, the pipe opening mounting plate is used to provide a mounting base for the third pipe opening and the fourth pipe opening, and can also limit and guide the lower end of the interlocking block and the interlocking rod, and a connecting hole is formed on the connecting piece to facilitate the connection with the first end of the first pull rope.

[0018] Optionally, the upper end of the interlocking baffle is provided with an arc-shaped blocking part capable of shielding or exposing the grounding switch operating rod with the lifting of the interlocking baffle, the middle part of the interlocking baffle is provided with a connecting hole, a connecting shaft is fixedly arranged in the connecting hole, one end of the second reset spring is connected with the connecting shaft, and the other end is connected with the pipe mouth mounting plate.

[0019] In the application, the interlocking baffle is used to block the grounding switch operating rod, so that the grounding switch operating rod in the blocked state cannot be operated by the handle, when the interlocking baffle moves upward under the tension of the second pull rope, the upper end of the interlocking baffle moves out of the area of the grounding switch operating rod, so that the user can operate the grounding switch operating rod through the handle, and at the same time, the second reset spring is in a stretched state, when the second pull rope no longer tensions the interlocking baffle, the second reset spring can drive the interlocking baffle to achieve the blocking effect.

[0020] Optionally, the interlocking seat is a hollow three-dimensional structure, the top surface and the bottom surface of the interlocking seat are both provided with a second through hole, the interlocking rod is arranged in the two second through holes, the first reset spring is arranged on the interlocking rod between the two second through holes, the lower end of the first reset spring is fixed with the interlocking seat, and the upper end of the first reset spring is compressed with the downward movement of the interlocking rod, the upper part and the lower part of the side surface of the interlocking seat are both formed with a mounting lug, the two mounting lugs are both provided with a third through hole, and the interlocking baffle is arranged in the two third through holes.

[0021] In the application, the interlocking seat provides the mounting and guiding effect for the interlocking rod and the interlocking baffle, the first reset spring is compressed and stores elastic potential energy in the downward movement process of the interlocking rod, when the distal end of the operating cam is away from the interlocking rod, the first reset spring that recovers from deformation can drive the interlocking rod to move upward and reset.

[0022] The application provides a ring network cabinet, which comprises a cabinet body, a cable test door, a load switch mechanism and the lifting interlocking device, the load switch mechanism is fixedly arranged in the cabinet body, the grounding switch operating rod is arranged on the load switch mechanism, the inner end of the grounding switch operating rod is used for connecting a grounding switch, a grounding switch operating hole is formed in the cabinet body, the outer end of the grounding switch operating rod is arranged outside the grounding switch operating hole, the cable test door is rotatably arranged on the lower part of the cabinet body, a cable test compartment is formed in the cable test door, a top plate support is fixedly arranged on the top of the cable test door, a second lock hole is formed in the top plate support, the lock rod assembly can be locked with the second lock hole, and the upper end of the top plate support can abut against the upper top assembly.

[0023] When the cable test door is closed by rotating upward, the top plate support lifts the upper top assembly, the second pull rope is pulled tight, the lower end of the interlocking stop piece is lifted upward under the action of the second pull rope, the interlocking stop piece exits the area of the grounding switch operation hole, the handle can operate the grounding switch operation rod, when the grounding switch operation rod is operated to open, the cam rotates, the distal end of the cam abuts against the interlocking rod, the interlocking rod moves downward, the first pull rope is pulled tight, the second lock hole is locked by the locking rod assembly driven by the first pull rope, and the cable test door cannot be opened.

[0024] When the grounding switch operation rod is operated to close, the cam rotates, the proximal end of the cam abuts against the interlocking rod, the interlocking rod moves upward under the action of the first reset spring, the first pull rope is relaxed, the locking rod assembly exits the second lock hole, the cable test door can be opened, the opening of the cable test door causes the top plate support to disengage from the upper top assembly, the upper top assembly disengages from the second pull rope, the interlocking stop piece is no longer pulled upward and moves downward under the action of the second reset spring to block the area of the grounding switch operation hole, and the handle cannot operate the grounding switch operation rod. The proximal end of the cam, i.e., the position closest to the rotation center on the profile edge of the cam.

[0025] Optionally, the number of the cable test door, the load switch mechanism and the pull-type interlocking device is at least two, and at least two of the cable test door, the load switch mechanism and the pull-type interlocking device are arranged in the cabinet in a one-to-one corresponding manner.

[0026] In the application, at least two cable test doors, load switch mechanisms and pull-type interlocking devices are arranged on the same cabinet, each cable test compartment is relatively independent, and more complex power supply requirements can be met.

[0027] Advantages:

[0028] The first pull rope and the second pull rope are used as the main transmission mode of interlocking, the interlocking transmission is not limited by direction and distance, problems of unstable interlocking function caused by assembly and machining errors are avoided, work efficiency and equipment reliability are greatly improved, the interlocking stop piece, the interlocking rod, the locking rod assembly and the upper top assembly are arranged in series through the first pull rope and the second pull rope, linkage between components is realized, and the interlocking effect is realized. BRIEF DESCRIPTION OF DRAWINGS

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of a pull-type interlocking device disclosed in this invention;

[0031] Figure 2 This is a schematic diagram of the connection between a pull-type interlocking device and a load switch mechanism disclosed in this invention;

[0032] Figure 3 This is a partial structural diagram of a pull-type interlocking device disclosed in this invention;

[0033] Figure 4 This is a schematic diagram of a second partial structure of a pull-type interlocking device disclosed in this invention;

[0034] Figure 5 This is a front view of the internal structure of a ring main unit disclosed in this invention;

[0035] Figure 6 This is a side view of the internal structure of a ring main unit disclosed in this invention;

[0036] Figure 7 for Figure 1 A magnified view of a portion at point A;

[0037] Figure 8 for Figure 2 A magnified view of a portion at point B;

[0038] Figure 9 for Figure 5 A magnified view of a portion at point C;

[0039] Figure 10 for Figure 6 A magnified view of a portion at point D;

[0040] Figure 11 for Figure 6 A magnified view of a portion at point E.

[0041] Figure label:

[0042] 1, interlocking seat; 2, interlocking rod; 21, first reset spring; 22, first pull rope; 3, interlocking stop sheet; 31, second reset spring; 32, second pull rope; 33, arc-shaped stop part; 34, connecting shaft; 4, locking rod assembly; 41, locking seat; 42, locking rod body; 43, fixed plate; 44, first pipe orifice; 5, upper top assembly; 51, top plate seat; 52, top plate body; 53, lock plate; 54, second pipe orifice; 55, third reset spring; 56, long strip hole; 57, mounting shaft; 6, load switch mechanism; 61, grounding switch operating rod; 62, cam; 7, pipe orifice mounting plate; 71, third pipe orifice; 72, fourth pipe orifice; 73, connecting sheet; 8, cabinet body; 9, cable test door; 91, top plate support.

[0043] The purposes, functional features and advantages of the present application will be further described with reference to the embodiments in combination with the accompanying drawings. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0045] In the description of the present application, the words such as setting, mounting, connecting and the like should be understood in a broad sense, and those skilled in the art can determine the specific meanings of the words in the present application in combination with the specific content of the technical solutions.

[0046] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0047] Reference is made to Figure 1 , Figure 2 , Figure 7 and Figure 8According to the embodiment of the application, the pull-type interlocking device comprises an interlocking seat 1, an interlocking rod 2, an interlocking baffle 3, a locking rod assembly 4 and an upper top assembly 5, the interlocking baffle 3 and the interlocking rod 2 are oppositely spaced and the lower ends of the interlocking baffle 3 and the interlocking rod 2 penetrate the interlocking seat 1, the upper end of the interlocking rod 2 corresponds to a grounding switch operating rod 61, the grounding switch operating rod 61 is provided with a cam 62, the cam 62 can abut against the upper end of the interlocking rod 2, specifically, when the distal end of the cam 62 rotates to the lowest point, the cam 62 can abut against the upper end of the interlocking rod 2, when the proximal end of the cam 62 rotates to the lowest point, the cam 62 does not abut against the upper end of the interlocking rod 2, the lower end of the interlocking rod 2 is connected with a first pull rope 22, the tail end of the first pull rope 22 is connected with the locking rod assembly 4, for pulling the locking rod assembly 4 to move, the lower end of the interlocking baffle 3 is connected with a second pull rope 32, the tail end of the second pull rope 32 is connected with the upper top assembly 5, the interlocking rod 2 is provided with a first reset spring 21, for driving the interlocking rod 2 to move upward to reset, the interlocking baffle 3 is provided with a second reset spring 31, for driving the interlocking baffle 3 to move downward to block the grounding switch operating rod 61.

[0048] In the application, the first pull rope 22 and the second pull rope 32 are used as the main transmission mode of interlocking, so that the interlocking transmission is not limited by direction and distance, and the problem of unstable interlocking function caused by assembly and machining errors is avoided, and the working efficiency and the reliability of the equipment are greatly improved.

[0049] Specifically, the first pull rope 22 and the second pull rope 32 each comprise an internal stainless steel wire rope and an external polytetrafluoroethylene wear-resistant layer, in the stretching transmission process, the polytetrafluoroethylene wear-resistant layer remains fixed, only the internal stainless steel wire rope is stretched, and the minimum bending radius of the first pull rope 22 and the second pull rope 32 is 50 mm, so as to ensure that the stainless steel wire rope can normally transmit.

[0050] Referring to Figure 4In some embodiments of the present application, the locking rod assembly 4 comprises a locking seat 41, a locking rod body 42, a fixing plate 43 and a first pipe 44, the locking seat 41 is provided with a through hole, the locking rod body 42 is movably arranged in the through hole, the fixing plate 43 is arranged on the side surface of the locking rod body 42, the first pipe 44 is fixedly arranged on the locking seat 41, the end of the first pull rope 22 is arranged in the first pipe 44 and connected with the fixing plate 43, the first pull rope 22 is pulled by the abutting of the cam 62 and the downward movement of the interlocking rod 2, and the end of the first pull rope 22 pulls the locking rod body 42 to move axially to be locked.

[0051] In the present application, the first pipe 44 is used to provide mounting support for the first pull rope 22, and the tensioning or relaxation of the first pull rope 22 can drive the axial movement of the locking rod body 42 on the locking seat 41 through the fixing plate 43, so as to realize the locking or unlocking effect.

[0052] Referring to Figure 4 In some embodiments of the present application, the locking seat 41 is a “J” type frame structure, the two opposite side surfaces of the locking seat 41 are provided with the through holes, the locking rod body 42 is arranged in the two through holes, and the top surface of the locking seat 41 is provided with a strip-shaped hole along the length direction of the locking rod body 42, the lower end of the fixing plate 43 extends into the strip-shaped hole and is connected with the side surface of the locking rod body 42.

[0053] In the present application, the locking seat 41 is arranged as a “J” type frame structure, which can reduce the production cost under the premise of ensuring the normal function of the locking seat 41 and facilitate the hole processing.

[0054] Referring to Figure 1 and Figure 4 In some embodiments of the present application, the upper top assembly 5 comprises a top plate seat 51, a top plate body 52 and a lock plate 53, the top plate body 52 is vertically movably arranged on the top plate seat 51, the lock plate 53 is fixedly arranged on the lower end of the top plate body 52, the lock plate 53 is provided with a first lock hole matched with the locking rod, the side surface of the top plate seat 51 is provided with a second pipe 54, the end of the second pull rope 32 extends downward to the top plate body 52, is bent upward, is arranged in the second pipe 54 and is connected with the top plate body 52 through the downward pulling, and the upper part of the top plate body 52 and the upper part of the top plate seat 51 are provided with a third reset spring 55.

[0055] In the present application, the top plate base 51 is used to provide a mounting base for the top plate body 52, which can be moved downward under the action of the second pull rope 32, and moved upward to reset under the action of the third reset spring 55 when the second pull rope 32 releases the tension on the top plate body 52.

[0056] Referring to Figure 4 In some embodiments of the present application, the side of the top plate base 51 is vertically spaced apart to form two first through holes, and the side of the top plate body 52 is vertically spaced apart to form two long holes 56, the two first through holes and the two long holes 56 correspond one-to-one in position, and a mounting shaft 57 is arranged in the first through hole and the corresponding long hole 56, and the long hole 56 and the corresponding mounting shaft 57 can move vertically.

[0057] In the present application, the mounting shaft 57 is fixed in position with the corresponding first through hole, and under the action of the second pull rope 32 and the third reset spring 55, the mounting shaft 57 and the corresponding long hole 56 can move vertically, and due to the positioning effect of the mounting shaft 57, the distance between the top plate body 52 and the top plate base 51 remains unchanged, ensuring stable movement of the top plate body 52.

[0058] Referring to Figure 1 In some embodiments of the present application, the pull-type interlocking device further comprises a pipe mounting plate 7, a third pipe 71, a fourth pipe 72 and a connecting piece 73, the pipe mounting plate 7 is arranged below the interlocking base 1, the interlocking stop piece 3 and the lower end of the interlocking rod 2 both pass through the pipe mounting plate 7, the connecting piece 73 is fixedly embedded in the lower end of the interlocking rod 2, the third pipe 71 and the fourth pipe 72 are fixedly arranged on the pipe mounting plate 7, and the positions of the third pipe 71, the fourth pipe 72, the interlocking stop piece 3 and the interlocking rod 2 are all spaced apart, the first end of the first pull rope 22 is connected to the connecting piece 73, and the first end of the second pull rope 32 is connected to the lower end of the interlocking stop piece 3.

[0059] In the present application, the pipe mounting plate 7 is used to provide a mounting base for the third pipe 71 and the fourth pipe 72, and can also serve as a limiting guide for the lower end of the interlocking stop piece 3 and the interlocking rod 2, and a connecting hole is formed in the connecting piece 73 to facilitate connection with the first end of the first pull rope 22.

[0060] Referring to Figure 1 and Figure 3In some embodiments of the present application, the upper end of the interlocking baffle 3 is provided with an arc-shaped baffle 33 capable of covering or exposing the grounding switch operating rod 61 with the lifting of the interlocking baffle 3, the middle part of the interlocking baffle 3 is provided with a connecting hole, a connecting shaft 34 is fixedly arranged in the connecting hole, one end of the second reset spring 31 is connected with the connecting shaft 34, and the other end is connected with the pipe mounting plate 7.

[0061] In the present application, the interlocking baffle 3 is used to block the grounding switch operating rod 61 to ensure that the grounding switch operating rod 61 in the blocked state cannot be operated by the handle, when the interlocking baffle 3 moves upward under the tension of the second pull rope 32, the upper end of the interlocking baffle 3 moves out of the area of the grounding switch operating rod 61, so that the user can operate the grounding switch operating rod 61 through the handle, while the second reset spring 31 is in a stretched state, when the second pull rope 32 no longer tensions the interlocking baffle 3, the second reset spring 31 can drive the interlocking baffle 3 to achieve the blocking effect.

[0062] Referring to Figure 1 and Figure 3 In some embodiments of the present application, the interlocking seat 1 is a hollow three-dimensional structure, the top surface and the bottom surface of the interlocking seat 1 are both provided with a second through hole, the interlocking rod 2 is arranged through the two second through holes, the first reset spring 21 is arranged on the interlocking rod 2 between the two second through holes, the lower end of the first reset spring 21 is fixed with the interlocking seat 1, the upper end of the first reset spring 21 is compressed with the downward movement of the interlocking rod 2, the upper part and the lower part of the side surface of the interlocking seat 1 are both formed with a mounting lug, the two mounting lugs are both provided with a third through hole, and the interlocking baffle 3 is arranged through the two third through holes.

[0063] In the present application, the interlocking seat 1 provides a mounting and guiding effect for the interlocking rod 2 and the interlocking baffle 3, the first reset spring 21 is compressed and stores elastic potential energy during the downward movement of the interlocking rod 2, when the distal end of the operating cam 62 is away from the interlocking rod 2, the first reset spring 21 which restores deformation can drive the interlocking rod 2 to move upward and reset.

[0064] Referring to Figure 5 , Figure 6 and Figures 9-11According to the embodiment of the application, the ring main unit comprises a cabinet 8, a cable test door 9, a load switch mechanism 6 and the pull-type interlocking device described above, the load switch mechanism 6 is fixedly arranged in the cabinet 8, the grounding switch operating rod 61 is arranged on the load switch mechanism 6, the inner end of the grounding switch operating rod 61 is used for connecting a grounding switch, a grounding switch operating hole is formed in the cabinet 8, the outer end of the grounding switch operating rod 61 extends out of the grounding switch operating hole, the cable test door 9 is rotatably arranged at the lower part of the cabinet 8, a cable test compartment is formed in the cable test door 9, a top plate support 91 is fixedly arranged at the top of the cable test door 9, a second locking hole is formed in the top plate support 91, the locking rod assembly 4 can be locked with the second locking hole, and the upper end of the top plate support 91 can abut against the upper top assembly 5.

[0065] Specifically, the cable test compartment is arranged to test the insulation resistance of the cable before the cable is put into operation or during maintenance, for example, using a megohmmeter to check whether the cable insulation is intact, and to apply high voltage to the cable for withstand voltage test without disassembling the cable, so as to verify whether the insulation strength meets the standard, thereby providing safety for the installation, maintenance and test of the cable, and providing a convenient operation space while ensuring the reliability of system operation and personnel safety.

[0066] Referring to Figure 5 In some embodiments of the application, the number of the cable test door 9, the load switch mechanism 6 and the pull-type interlocking device is at least two, and at least two of the cable test door 9, the load switch mechanism 6 and the pull-type interlocking device are arranged in the cabinet 8 in one-to-one correspondence.

[0067] In the application, by arranging at least two cable test doors 9, load switch mechanisms 6 and pull-type interlocking devices, at least two cable test compartments can be arranged on the same cabinet 8, each cable test compartment is relatively independent, and more complex power supply requirements can be met.

[0068] The application works when the cable test door 9 is turned upward to be closed, the top plate support 91 moves upward and lifts the lock plate 53, so that the top plate body 52 connected with the lock plate 53 can move upward relative to the top plate seat 51, the third reset spring 55 is compressed, the end of the second pull rope 32 is pulled tight, so that the lower end of the interlocking baffle 3 connected with the first end of the second pull rope 32 moves upward due to the pulling effect, the second reset spring 31 is stretched, the arc-shaped blocking part 33 of the interlocking baffle 3 exits the area of the grounding switch operation hole upward, and the operator can operate the grounding switch operating rod 61 through the handle to ground trip, when the grounding trip operation is performed, the cam 62 rotates to the far end thereof to abut against the upper end of the interlocking rod 2, so that the interlocking rod 2 generates downward displacement, the first reset spring 21 is compressed, the first end of the first pull rope 22 is pulled tight, and the end of the first pull rope 22 can pull the fixed plate 43 to move the locking rod body 42 on the locking seat 41, so that the locking rod body 42 can be inserted into the second lock hole of the top plate support 91, so that the cable test door 9 cannot be opened after the grounding trip, thereby reducing the security risks.

[0069] When the operator operates the grounding switch operating rod 61 through the handle to close, the cam 62 rotates to the near end thereof to abut against the upper end of the interlocking rod 2, the first reset spring 21 recovers the deformation to drive the interlocking rod 2 to move upward, the first end of the first pull rope 22 becomes loose, the locking rod body 42 exits from the second lock hole, and the cable test door 9 can be opened, when the cable test door 9 is opened, the top plate support 91 no longer provides the jacking effect to the lock plate 53, under the action of the gravity of the top plate body 52 and the elongation of the third reset spring 55 recovering the deformation, the top plate body 52 moves downward relative to the top plate seat 51, so that the end of the second pull rope 32 becomes loose, the first end of the second pull rope 32 no longer provides the upward pulling effect to the interlocking baffle 3, under the action of the gravity of the interlocking baffle 3 and the contraction of the second reset spring 31 recovering the deformation, the interlocking baffle 3 moves downward, so that the arc-shaped blocking part 33 blocks the area of the grounding switch operation hole, and the operator cannot operate the grounding switch operating rod 61 through the handle, thereby ensuring that the grounding switch operating rod 61 cannot be operated in the opened state of the cable test door 9.

[0070] The above is only the preferred embodiment of the application, and does not limit the patent scope of the application, and any equivalent structural transformation, direct / indirect application in other related technical fields under the inventive concept of the application and according to the content of the specification and drawings are included in the patent protection scope of the application.

Claims

1. A pull-up interlock device, characterized by, The utility model relates to a ground switch locking device, including interlock seat (1), interlock rod (2), interlock baffle (3), locking rod assembly (4) and upper top assembly (5), interlock baffle (3) and interlock rod (2) are opposite interval arrangement and all the lower end of the interlock baffle (3) and the interlock rod (2) are through interlock seat (1), the upper end of interlock rod (2) corresponds and has ground switch operating lever (61), ground switch operating lever (61) is provided with cam (62), cam (62) can be with the upper end of interlock rod (2) and abuts, the lower end of interlock rod (2) is connected with first pull rope (22), the end of first pull rope (22) is connected with locking rod assembly (4), is used for traction locking rod assembly (4) moves, the lower end of interlock baffle (3) is connected with second pull rope (32), the end of second pull rope (32) is connected with upper top assembly (5), interlock rod (2) is provided with first reset spring (21), is used for driving interlock rod (2) and moves up reset, interlock baffle (3) is provided with second reset spring (31), is used for driving interlock baffle (3) and moves down and blocks ground switch operating lever (61); Locking rod assembly (4) includes locking seat (41), locking rod body (42), fixed plate (43) and first pipe orifice (44), the locking seat (41) is opened and has through hole, the locking rod body (42) is movably arranged in the through hole, the side of locking rod body (42) is provided with fixed plate (43), the first pipe orifice (44) is fixedly arranged on the locking seat (41), the end of first pull rope (22) is arranged in the first pipe orifice (44) and is connected with fixed plate (43), the cam (62) abuts the lower end of interlock rod (2) and can tighten the first end of first pull rope (22), the end of first pull rope (22) pulls locking rod body (42) and moves along the axial direction and is locked; The upper top assembly (5) includes a top plate seat (51), a top plate body (52), and a lock plate (53). The top plate body (52) is vertically movably arranged on the top plate seat (51). The lock plate (53) is fixedly arranged on the lower end of the top plate body (52). The lock plate (53) is provided with a first lock hole matched with the locking rod. The side of the top plate seat (51) is provided with a second pipe orifice (54). The end of the second pull rope (32) extends downward to the top plate body (52), is bent upward, is arranged in the second pipe orifice (54), and is connected with the top plate body (52) by pulling downward. The third reset spring (55) is arranged between the upper part of the top plate body (52) and the upper part of the top plate seat (51).

2. A pull-up interlock device according to claim 1, wherein The locking seat (41) is a "J" type frame structure, two opposite sides of the locking seat (41) are provided with the through holes, the locking rod body (42) is arranged in the two through holes, and a strip hole is formed in the top surface of the locking seat (41) along the length direction of the locking rod body (42). The lower end of the fixing plate (43) extends into the strip hole and is connected with the side surface of the locking rod body (42).

3. A pull-up interlock device according to claim 1, wherein The side surface of the top plate seat (51) is vertically spaced apart to be provided with two first through holes, the side surface of the top plate body (52) is vertically spaced apart to be provided with two strip holes (56), the two first through holes correspond to the two strip holes (56) one by one, the first through hole and the corresponding strip hole (56) are provided with a mounting shaft (57), and the strip hole (56) and the corresponding mounting shaft (57) can be vertically moved.

4. A pull-up interlock device according to claim 1, wherein The pull-type interlocking device further comprises a pipe mounting plate (7), a third pipe (71), a fourth pipe (72) and a connecting piece (73). The pipe mounting plate (7) is arranged below the interlocking seat (1), the lower end of the interlocking baffle (3) and the interlocking rod (2) are arranged out of the pipe mounting plate (7), the connecting piece (73) is fixedly arranged at the lower end of the interlocking rod (2), the third pipe (71) and the fourth pipe (72) are arranged through and fixed on the pipe mounting plate (7), the positions of the third pipe (71), the fourth pipe (72), the interlocking baffle (3) and the interlocking rod (2) are spaced apart, the first pull rope (22) is connected with the connecting piece (73) at the upper end, and the second pull rope (32) is connected with the lower end of the interlocking baffle (3) at the upper end.

5. A pull-up interlock device according to claim 4, wherein The upper end of the interlocking baffle (3) is provided with an arc-shaped baffle (33), the arc-shaped baffle (33) can shield or expose the grounding switch operating rod (61) along with the lifting of the interlocking baffle (3), a connecting hole is formed in the middle part of the interlocking baffle (3), a connecting shaft (34) is fixedly arranged in the connecting hole, one end of the second reset spring (31) is connected with the connecting shaft (34), and the other end is connected with the pipe mounting plate (7).

6. A pull-up interlock device as defined in claim 1, wherein The interlocking seat (1) is a hollow three-dimensional structure, the top surface and the bottom surface of the interlocking seat (1) are provided with second through holes, the interlocking rod (2) is arranged in the two second through holes, the first reset spring (21) is arranged on the interlocking rod (2) between the two second through holes, the lower end of the first reset spring (21) is fixed with the interlocking seat (1), the upper end of the first reset spring (21) is compressed along with the downward movement of the interlocking rod (2), the upper part and the lower part of the side surface of the interlocking seat (1) are formed with mounting lugs, third through holes are formed in the two mounting lugs, and the interlocking baffle (3) is arranged in the two third through holes.

7. A ring main unit, characterized in that The cabinet (8) is internally fixed with the load switch mechanism (6), the ground switch operating rod (61) is arranged on the load switch mechanism (6), the inner end of the ground switch operating rod (61) is used for being connected with a ground switch, a ground switch operating hole is formed in the cabinet (8), the outer end of the ground switch operating rod (61) is arranged outside the ground switch operating hole, the cable test door (9) is rotatably arranged at the lower part of the cabinet (8), the cable test door (9) is internally formed with a cable test compartment, the top of the cable test door (9) is fixedly provided with a top plate support (91), the top plate support (91) is internally formed with a second locking hole, the locking rod assembly (4) can be locked with the second locking hole, and the upper end of the top plate support (91) can be abutted with the upper top assembly (5). When the cable test door (9) is closed by being upwardly rotated, the top plate support (91) lifts the upper top assembly (5), the second pull rope (32) is pulled tight, the lower end of the interlocking baffle (3) is lifted upwardly under the action of the second pull rope (32), the interlocking baffle (3) exits the area of the ground switch operating hole, the ground switch operating rod (61) can be operated by a handle, when the ground switch operating rod (61) is operated to be tripped, the cam (62) is rotated, the distal end of the cam (62) is abutted against the interlocking rod (2), the interlocking rod (2) is moved downwardly, the first pull rope (22) is pulled tight, the first pull rope (22) drives the locking rod assembly (4) to lock the second locking hole, and the cable test door (9) cannot be opened. When the ground switch operating rod (61) is operated to be closed, the cam (62) is rotated, the proximal end of the cam (62) is abutted against the interlocking rod (2), under the action of the first reset spring (21), the interlocking rod (2) is moved upwardly, the first pull rope (22) is relaxed, the locking rod assembly (4) exits the second locking hole, the cable test door (9) can be opened, the opening of the cable test door (9) causes the top plate support (91) to release the abutment with the upper top assembly (5), the upper top assembly (5) releases the pulling tight of the second pull rope (32), the interlocking baffle (3) is no longer pulled upwardly and is moved downwardly under the action of the second reset spring (31) to block the area of the ground switch operating hole, and the handle cannot operate the ground switch operating rod (61).

8. The ring main unit according to claim 7, characterized in that The number of the cable test door (9), the load switch mechanism (6) and the pull-type interlocking device is at least two, and at least two cable test doors (9), load switch mechanisms (6) and pull-type interlocking devices are correspondingly and spacedly arranged in the cabinet (8).

Images