CN219937773U

CN219937773U - Centrally installed switchgear handcart and bypass uninterrupted power supply system with same

Info

Publication number: CN219937773U
Application number: CN202320072937.4U
Authority: CN
Inventors: 李德高; 刘重义
Original assignee: Dongguan Nabaichuan Electronic Technological Co ltd
Current assignee: Dongguan Nabaichuan Electronic Technological Co ltd
Priority date: 2023-01-10
Filing date: 2023-01-10
Publication date: 2023-10-31
Anticipated expiration: 2033-01-10

Abstract

Put cabinet handcart and have this put cabinet handcart's bypass uninterrupted power supply system in, wherein put cabinet handcart including: the device comprises a chassis, a handcart frame fixedly arranged on the chassis, a contact arm fixedly arranged on the handcart frame and used for being electrically connected with a primary side or secondary side bus bar, and a quick plug-in device fixedly arranged on the handcart frame and mutually corresponding to the contact arm to form a relative pole. The utility model mainly integrates the interface device with the rapid plugging function into the design of a standard handcart of a centrally installed switchgear, realizes the matched use with the centrally installed switchgear on the basis of not changing the structures, the operation modes, the interlocking mechanisms and the like of the inlet cabinet and the outlet cabinet body of the original armored movable metal closed switch equipment, can temporarily replace a circuit breaker handcart to complete the rapid access of a bypass uninterrupted operation cable system to a medium voltage distribution network, and solves the problem that the centrally installed switchgear has no special interface device for bypass operation.

Description

Centrally installed switchgear handcart and bypass uninterrupted power supply system with same

Technical Field

The utility model relates to the technical field of power distribution switch equipment, in particular to a centrally installed switchgear handcart and a bypass uninterrupted power supply system with the same.

Background

KYN28A-12 armoured movable metal closed switch equipment (centrally installed switchgear) is a complete set of power distribution equipment of 3.6-12 kV three-phase alternating current 50Hz single bus and single bus sectioning system. The device is mainly used for controlling, protecting and monitoring power transmission of power plants, small and medium-sized generators, power distribution of industrial and mining enterprises, power reception and transmission of secondary substation of a power system, starting of large-sized high-voltage motors and the like.

The switching device is designed as an LSC1 switching device in GB 3906. The whole cabinet consists of a cabinet body and a centrally-arranged extractable part (i.e. a handcart), and is briefly described as follows:

the cabinet body is divided into four independent compartments, the protection level of the shell is IP4X, and the protection level of each inter-cell and breaker room door is IP2X when the inter-cell and breaker room door is opened. The power distribution device has the functions of overhead outgoing lines, cable incoming and outgoing lines and other functional schemes, and can be formed into various scheme forms after being arranged and combined. The switch equipment can be installed, debugged and maintained from the front, so that the switch equipment can be assembled back to form double arrangement and wall-mounted, the safety and flexibility of the switch equipment are improved, and the occupied area is reduced.

The handcart with the central cabinet in the core component is also formed by assembling thin steel plates after being processed by a CNC machine tool. The handcart is in insulating fit with the cabinet body, and the mechanical interlocking is safe, reliable and flexible. The circuit breaker handcart, the voltage transformer handcart, the metering handcart and the isolation handcart are separated according to different purposes. All kinds of handcarts can be freely exchanged with the same specification according to the module and the building block type change. The handcart has a disconnection position/test position and a working position in the cabinet body, and each position is provided with a positioning device respectively so as to ensure reliable interlocking and operation according to an interlocking misoperation prevention program is needed. The various handcarts are rocked by the worm wheel and the worm to push and withdraw, so that the operation is light and flexible, and the device is suitable for various operators on duty to operate. When the handcart needs to be moved away from the cabinet body, the handcart can be conveniently taken out by using a special transfer trolley to perform various inspections and maintenance; because of the adoption of the middle-arranged type handcart, the whole handcart has small volume, light weight and extremely convenient inspection and maintenance.

The utility model provides a put in can disposing on the cabinet handcart and be provided with two relatively and touch the arm to constitute a vacuum circuit breaker, two touch the arm and be connected with same looks busbar and cable respectively, thereby carry out power transmission, in high voltage power system, put the cabinet handcart in and all have three-phase circuit breaker, thereby can carry out the electricity with three-phase busbar, cable respectively and be connected, thereby carry out the transmission work of electric power, owing to the characteristics of its structure, make it can not possess the thread and install or repacking quick interface device's condition additional.

In order to ensure the power supply reliability of the medium-voltage distribution network, the uninterrupted operation capability of the distribution network in the area is effectively improved, and the power supply company requires: through installing 10kV emergency power interface perception module, form fixed power hot spot and be used as power supply access point or load output point at the distribution network, make the distribution network possess quick, nimble interim networking ability, realize joining in marriage the net maintenance operation mode and progressively follow "take power failure operation as the owner," to including "live working, bypass operation and temporary power supply operation" the conversion of "no power failure operation" mode.

However, the main network main flow equipment-armored movable metal enclosed switchgear (centrally installed switchgear) does not have the condition of on-site installation of a rapid plug interface device due to the structural characteristics of the main network main flow equipment-armored movable metal enclosed switchgear, and a brand new scheme is urgently needed to be redesigned to solve the problems that a bypass cable cannot be rapidly connected to a power-uninterrupted operation system, the maintenance load cannot be transferred to a place, and large-area and long-time power failure of a user is caused by maintenance of a medium-voltage power distribution room.

Disclosure of Invention

The utility model aims to provide a centrally installed switchgear handcart, which can directly replace the centrally installed switchgear handcart, is convenient for uninterrupted operation of a bypass cable, and simultaneously, the utility model also provides a bypass uninterrupted power supply system, and is convenient for uninterrupted operation of the bypass cable.

The technical scheme adopted by the utility model for solving at least one technical problem is as follows:

the utility model provides a centrally installed switchgear handcart, which comprises: chassis car, fixed mounting be in handcart frame on the chassis car, fixed mounting be in contact arm on the handcart frame, still including, fixed mounting be in on the handcart frame, and with contact arm corresponds each other and constitute the quick plug device of relative utmost point, quick plug device is including:

the wiring unit is electrically connected with the contact arm and comprises a wiring sleeve and a conductive rod arranged in the wiring sleeve, and two ends of the wiring sleeve respectively form a wiring terminal and a plug-in end;

the front end of the interface unit is provided with an opening part for plugging.

Further, the interface unit comprises

The socket rear sleeve is sleeved on the plug end, the inner wall of the socket rear sleeve and the plug end are mutually separated to form a plug space, and the end part of the plug space forms the opening part;

The inner bushing is sleeved in the socket rear sleeve and positioned in the plugging space, and a limiting table for limiting the inner bushing from falling out is arranged at the front end of the socket rear sleeve;

and the plug compression spring is sleeved in the socket rear sleeve and positioned at the rear side of the inner bushing, and provides elastic support for the inner bushing towards the front end of the socket rear sleeve.

Further, the quick plug device is further provided with a sealing cover for sealing the mouth of the interface unit, and the sealing cover comprises:

the front end of the silica gel body is provided with a plug hole which is matched with the plug end and is inserted by the plug end;

the quick-plug front sleeve is sleeved on the silica gel body, and is positioned at the front end of the quick-plug front sleeve, the diameter of which is matched with the inner diameter of the socket rear sleeve, so as to be plugged in the plugging space;

and the end cover is simultaneously connected with the silica gel body and the rear end of the quick-inserting front sleeve.

Further, a guide hole is formed in the end face of the conductive rod, which is located on the plug-in end;

the sealing cover also comprises a guide sleeve arranged in the plug hole, and the guide sleeve is formed with a guide rod facing the outside and corresponding to the guide hole.

Further, the interface unit further includes a locking mechanism, configured to lock the cover, and the locking mechanism includes:

the mounting hole is arranged on the socket rear sleeve, the longitudinal section of the mounting hole is of a structure with wide upper part and narrow lower part, the mounting hole is positioned at the opening of the plugging space and is blocked by the inner bushing which is elastically supported by the plug compression spring and extends out,

positioning marble which is arranged in the mounting hole and has a diameter larger than the diameter of the narrowest opening of the mounting hole,

a movable sleeve sleeved at the front end of the socket rear sleeve, an accommodating ring groove corresponding to the mounting hole and used for accommodating the positioning marble is arranged on the inner wall of the front end of the movable sleeve,

the locking spring is sleeved on the socket rear sleeve and provides elastic thrust towards the front end direction of the socket rear sleeve for the movable sleeve, so that the containing ring groove on the movable sleeve and the mounting hole are in a mutually staggered state, the movable sleeve presses the positioning marble towards the direction of the inserting space,

the positioning piece is arranged on the circumferential surface of the front end of the socket rear sleeve and used for resisting the movable sleeve so as to prevent the movable sleeve from falling out of the socket rear sleeve under the action of elastic thrust;

And a positioning ring groove for embedding the positioning marble is formed in the circumferential surface of the quick-insertion front sleeve.

Further, the locking mechanism is also provided with a locking structure which comprises

A yielding groove which is positioned at the end part of the movable sleeve far away from the positioning piece and is arranged along the axial direction of the movable sleeve,

the locating pin is located the movable sleeve rear side is installed on the socket rear sleeve, the movable sleeve is followed the socket rear sleeve circumference rotates when the back-off groove with the locating pin is in corresponding position, the movable sleeve can overcome locking spring's elastic thrust orientation locating pin direction removes to the holding annular with the mounting hole corresponds each other, the movable sleeve is followed socket rear sleeve circumference rotates the back-off groove with the locating pin dislocation time, the locating pin restriction the movable sleeve orientation locating pin direction removes.

Furthermore, the wiring sleeve is formed by injection molding of epoxy resin materials, the conducting rod is injection molded inside the wiring sleeve, a shielding layer and a sensor electrically connected with the shielding layer are further arranged inside the wiring sleeve, and the other end of the sensor is located outside the wiring sleeve.

Furthermore, the end part of the contact arm is provided with a plum blossom head, the plum blossom head is clamped in a groove at the end part of the prime number contact arm, and the other end of the plum blossom head is connected with the wiring terminal through a conductive copper bar.

Further, a covered insulator is further connected to the handcart frame, and the contact arm and the conductive copper bar are connected to the covered insulator in a threaded mode together, and the connection position of the contact arm and the conductive copper bar is shielded.

Further, a cover plate is further arranged on the handcart frame, the cover plate is made of transparent materials, and one end of the cover plate is hinged to the handcart frame and used for covering the interface unit.

On the other hand, the utility model also provides a bypass uninterrupted power supply system, which comprises

The power transmission system comprises a centrally installed switchgear, a power transmission system and a power transmission system, wherein the centrally installed switchgear is provided with an instrument room, a circuit breaker handcart room, a cable room connected with a cable and a bus room provided with a bus bar, and the circuit breaker handcart room is provided with an original handcart for electrically connecting the cable and the bus bar;

the centrally installed switchgear handcart is used for replacing the original handcart;

the bypass flexible cable is used for power transmission, one end of the bypass flexible cable is fixedly connected with a quick plug connector, the quick plug connector is used for being plugged into the mouth of the interface unit on the middle-placed cabinet handcart, and the other end of the bypass flexible cable is used for being electrically connected with external equipment.

Further, an upper contact box electrically connected with the busbar of the busbar chamber is arranged in the centrally installed switchgear, and a contact is arranged in the upper contact box, so that after the centrally installed switchgear handcart is pushed to a working position, the contact arm is inserted into the upper contact box and is abutted to the contact, and a power supply side uninterrupted power supply system is formed.

Further, a lower contact box electrically connected with the cable of the cable chamber is arranged in the middle cabinet, and a contact is arranged in the lower contact box, so that after the middle cabinet handcart is pushed to a working position, the contact arm is inserted into the lower contact box and is abutted to the contact, and a power supply system without power failure for load measurement is formed.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model mainly integrates a quick plug device with a quick plug function into the design of a standard handcart of a centrally installed switchgear, and integrates the quick plug device into a special handcart with two different structures of an interface handcart special for the wire inlet switchgear and an interface handcart special for the wire outlet switchgear, and on the basis of not changing the structures, the operation modes, the interlocking mechanisms and the like of the wire inlet switchgear and the wire outlet switchgear body of the original armored movable metal closed switch equipment (centrally installed switchgear), the quick plug device is matched with the centrally installed switchgear, can temporarily replace a circuit breaker handcart to complete the quick access of a bypass uninterrupted operation cable system to a medium voltage distribution network, and solves the problem that the centrally installed switchgear has no bypass operation special interface device.

The quick plug device and the sealing cover adopt the ethylene propylene diene monomer material with high strength and excellent electrical performance as the insulating material, and are matched with the epoxy resin with higher strength, corrosion resistance and excellent electrical performance, the quick plug port adopts the stainless steel material design with high mechanical strength, difficult deformation, damage and firmness and durability to manufacture the quick plug interface device, the special handcart with the quick plug function, which is matched with the special interface handcart of the wire inlet and outlet cabinets, is realized, and the practical problem that the centrally installed switchgear does not have the on-site quick plug interface device due to the structural characteristics is solved.

According to the utility model, under the cooperation of the bypass cable system module, the special interface handcart module of the incoming/outgoing line cabinet and the middle-placed cabinet module, the medium-voltage power generation vehicle can be easily and quickly connected into the power distribution network system by utilizing the mutual connection of the quick plug connector of the bypass cable system, the quick plug connector of the special interface handcart of the incoming/outgoing line cabinet, the middle-placed cabinet and the fixed contact, so that the problem that the bypass operation cable system cannot be quickly connected into the medium-voltage power distribution network system is solved, and the problem that a large area and a long time power failure of a user are caused by the power failure of a main bus or the power failure of a load side of the medium-voltage power distribution system when the fault or the overhaul of a high-voltage incoming cable of the medium-voltage power distribution network, the fault or the overhaul of a main bus and the fault or the overhaul of a circuit breaker handcart are solved.

Under the cooperation of the bypass cable system module, the middle-placed cabinet handcart module and the middle-placed cabinet module, the middle-placed cabinet handcart can be easily and quickly connected into a single-loop cable chamber or a bus chamber by utilizing the quick plug connector of the bypass cable system, the quick plug connector of the middle-placed cabinet handcart and the interconnection of movable and static contacts of the middle-placed cabinet body, so that the problem that a bypass operation cable system cannot be quickly connected into a middle-voltage distribution network system is solved, and the problems that a user of the middle-voltage distribution system is large in area and has long-time power failure caused by the failure or maintenance of a high-voltage main bus of the middle-voltage distribution network, the failure or maintenance of a circuit breaker handcart and the failure or maintenance of a high-voltage incoming cable of the middle-voltage distribution network are solved

The utility model utilizes the structural characteristics of the existing equipment, adopts the standardized design concept, has strong universality, is convenient to operate, has novel structure and is simple and ingenious in design.

The utility model is further described below with reference to the drawings and embodiments of the specification.

Drawings

Fig. 1 is a schematic diagram of the structure of the present utility model.

Fig. 2 is a schematic diagram of a second embodiment of the present utility model.

Fig. 3 is a schematic structural diagram of the quick plugging device in the present utility model.

Fig. 4 is an exploded view of the quick connect and disconnect device of the present utility model.

Fig. 5 is a cross-sectional view of an exploded structure of the quick connect and disconnect device of the present utility model.

Fig. 6 is a second cross-sectional view of the explosive structure of the quick connect and disconnect device of the present utility model.

Fig. 7 is a cross-sectional view of the present utility model with the cover over the interface unit.

Fig. 8 is a partial enlarged view of a portion a in fig. 7.

Fig. 9 is a schematic view of an exploded construction of the closure of the present utility model.

Fig. 10 is a schematic diagram of an exploded structure of an interface unit according to the present utility model.

Fig. 11 is a schematic view of an exploded construction of the terminal member of the present utility model.

Fig. 12 is a schematic structural view of a test location of the outlet cabinet cart.

Fig. 13 is a schematic structural view of the operational position of the outlet cabinet trolley.

Fig. 14 is a schematic structural view of a test position of the incoming line cabinet handcart.

Fig. 15 is a schematic view of the structure of the service position of the incoming line cabinet handcart.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It should be noted that all directional indications (such as up, down, left, right, front, and rear are used in the embodiments of the present utility model) are merely for explaining the relative positional relationship, movement conditions, and the like between the components in a certain specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly.

In addition, the descriptions of "first," "second," etc. in the embodiments of the present utility model are provided for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

The embodiment of the utility model provides a centrally installed switchgear handcart 1, as shown in fig. 1-2, which comprises a chassis 2 for an 800-width cabinet, a handcart frame 3 arranged on the chassis 2, and a 1250A contact arm 4 arranged on the handcart frame 3, wherein a plum blossom contact 41 is clamped at the front end of the contact arm 4 and is used for being electrically connected with a bus bar 63 of a bus bar chamber or a cable chamber, and meanwhile, a quick plug-in device 5 forming an opposite pole with the contact arm 4 is also arranged on the handcart frame 3; as shown in fig. 3-4, the quick connect-disconnect device 5 includes a wiring unit 51 and an interface unit 52, wherein the wiring unit 51 is connected with the contact arm 4 through a conductive member 511, specifically, the wiring unit 51 is connected with a conductive copper bar through a bolt, and the other end of the conductive copper bar is connected with the contact arm 4 through a bolt, so that the quick connect-disconnect device 5 is electrically connected with the contact arm 4; at the front end of the interface unit 52, several mouths 521 are provided for the external cables 62 to plug into each other.

In this embodiment, as shown in fig. 4-11, the wiring unit 51 includes a wiring sleeve 512 and a conductive rod 513, and two ends of the conductive rod respectively form a wiring terminal 514 and a plugging terminal 515, wherein the conductive rod 513 is located in the wiring sleeve 512 and the portion located in the wiring terminal 514 is connected with the conductive copper bar through a bolt. The wire sleeve 512 is made of epoxy resin material, the conductive rod 513 is integrally molded inside the wire sleeve 512, and the shielding layer 5121 and the sensor 5122 are simultaneously molded inside the wire sleeve 512, as shown in fig. 6 and 11, one end of the sensor 5122 is connected with the shielding layer 5121 through a bolt, and the other end is positioned outside the wire sleeve 512 so as to be connected with an external monitoring system.

As shown in fig. 3-6 and 10, the interface unit 52 includes a socket rear sleeve 522, an inner bushing 524, and a plug compression spring 526, wherein the socket rear sleeve 522 is sleeved on the plugging end 515, and the inner diameter of the socket rear sleeve 522 is larger than the diameter of the plugging end 515, so that the inner wall of the socket rear sleeve 522 and the plugging end 515 are mutually spaced to form a plugging space 523, it should be noted that an insert 5123 is further formed on the connection sleeve 512, the connection sleeve 512 is connected on the handcart frame 3 through the insert 5123, one end of the socket rear sleeve 522 is connected with a flange 5221, the socket rear sleeve 522 is connected on the insert 5123 through the flange 5221, so as to connect the socket rear sleeve 522 with the connection sleeve 512, and the front end of the socket rear sleeve 522 forms a mouth 521 for plugging with the external cable 62, at this time, it should be understood that the plugging end 515 of the connection sleeve 512 is located in the socket rear sleeve 522 and is exposed at the mouth 521, so as to facilitate plugging with the external cable 62; plug compression spring 526 and inner bushing 524 are once sleeved inside socket rear housing 522, and plug compression spring 526 is located at the rear side of inner bushing 524, so that elastic support is provided for inner bushing 524 towards the front end of socket rear housing 522, so that inner bushing 524 extends towards the front end of socket rear housing 522 under the action of elastic support, and meanwhile, a limiting table 525 is arranged at the front end of socket rear housing 522, so that inner bushing 524 is limited and blocked, and is prevented from being pushed out under the action of plug compression spring 526 inside socket rear housing 522.

In the use process, the connection sleeve 512 is exposed at the front end opening 521 of the socket rear sleeve 522, so that the connection sleeve can be connected with an external cable 62 in an inserting mode, specifically, the front end of the external cable 62 is fixedly connected with the quick plug 71, the quick plug 71 is inserted into the inserting space 523 and then is connected with the inserting end 515 in an inserting mode, at this time, the quick plug 71 is firstly contacted with the inner bushing 524 in the inserting process of the quick plug 71 into the inserting space 523 through the opening 521, and the plug compression spring 526 is used for blocking in the inserting process, so that a certain resistance exists in the inserting process, and the inserting stability is enhanced.

In this embodiment, the interface unit 52 further has a cover 53 for closing the opening 521, and the cover 53 is inserted into the interface unit 52 to protect the plugging end 515 when the interface unit is not in operation. As shown in fig. 5-6 and 9, the front end of the silica gel 531 is provided with a plug hole 532 which is mutually matched with the plug end 515, the quick plug front sleeve 533 is sleeved on the silica gel 531, the diameter of the quick plug front sleeve is mutually matched with the inner diameter of the socket rear sleeve 522, the quick plug front sleeve can be inserted into the plug space 523 to seal the sealed space at the opening 521, the end cover 534 is simultaneously connected on the silica gel 531 and the rear end of the quick plug front sleeve 533 to form the sealing cover 53, a slot 5311 is arranged on the rear end of the silica gel 531, a clamp spring 5341 is arranged in the end cover 534 to clamp the end cover 534 on the silica gel 531, and the rear end of the quick plug front sleeve 533 is connected on the end cover 534 through a bolt to form the whole sealing cover 53. In the use process, the quick-plug front sleeve 533 is inserted into the plug space 523, at this time, the plug hole 532 corresponds to the plug end 515 and accommodates the plug end 515 therein, so that the mouth 521 is plugged, and the plug end 515 is protected by the silica gel 531.

In this embodiment, in order to facilitate the insertion of the cap 53 into the insertion hole 532, a guide sleeve 535 is disposed in the insertion hole 532, a guide rod 536 is formed on the end surface of the guide sleeve 535 facing the outside of the insertion hole 532, a guide hole 5131 corresponding to the guide rod 536 is correspondingly formed on the end surface of the conductive rod 513, and when the cap 53 is inserted into the insertion space 523, the insertion end 515 is gradually accommodated in the insertion hole 532, and the guide rod 536 is inserted into the guide hole 5131 in advance to guide, thereby facilitating the insertion of the cap 53 into the mouth 521 and the blocking of the insertion space 523.

In this embodiment, as shown in fig. 7-10, a locking mechanism 527 is disposed on the interface unit 52, and the locking mechanism 527 is used to lock the plug 71 inserted into the plugging space 523 and plugged into the external cable 62, so as to ensure the firmness of plugging. Specifically, a mounting hole 5227, which is wider at the top and narrower at the bottom, is formed in the front end of the socket rear cover 522, and at this time, the opening end of the mounting hole 5227 located in the insertion space 523 is blocked by an inner bushing 524 that is elastically supported and protrudes; the locking mechanism 527 further comprises a positioning ball 5271, a movable sleeve 5272, a locking spring 5274 and a positioning piece 5275 which are arranged in the mounting hole 5227, wherein the movable sleeve 5272 is sleeved on the front end of the socket rear sleeve 522, a containing annular groove 5273 which corresponds to the mounting hole 5227 and is used for containing the positioning ball 5271 is formed in the front end position of the inner wall of the movable sleeve 5272, the locking spring 5274 is sleeved on the socket rear sleeve 522 and is positioned on the rear side of the movable sleeve 5272 and is used for providing elastic thrust to the front end of the socket rear sleeve 522, so that the containing annular groove 5273 of the movable sleeve 5272 and the mounting hole 5227 are mutually staggered, the positioning ball 5271 is pressed towards the inserting space 523 in the process of dislocation, and at the moment, the positioning piece 5275 is arranged on the circumferential surface of the front end of the socket rear sleeve 522 and is used for resisting the movable sleeve 5272. Specifically, as shown in fig. 10, the front end of the socket rear sleeve 522 is provided with a mounting position 5222, so that the socket rear sleeve 522 forms a stepped shaft structure with a smaller front end diameter, the locking spring 5274 is sleeved on the mounting position 5222 and is blocked by a shaft shoulder 5223 on the mounting position 5222, correspondingly, the mounting hole 5227 is also provided with a front end of the mounting position 5222, the movable sleeve 5272 is also sleeved on the mounting position 5222 of the socket rear sleeve 522, the locking spring 5274 is covered in the mounting position 5222, the positioning piece 5275 is a clamp spring, and a slot 5224 is arranged at the front end of the mounting position 5222, so that the positioning piece 5275 limits the movable sleeve 5272 and prevents the movable sleeve 5272 from falling out from the mounting position. In an initial state, the inner bushing 524 is elastically supported by the plug compression spring 526 toward the front end of the socket rear housing 522 and seals the opening of the mounting hole 5227 within the insertion space 523, so that a part of the positioning marble 5271 is positioned within the mounting hole 5227 and the other part thereof is positioned within the receiving groove 5273, and at this time, the locking spring 5274 of the movable housing 5272 is compressed by the positioning marble 5271. At this time, a positioning ring groove 5331 is formed on the circumferential surface of the quick-insert front sleeve 533, and the positioning ring groove 5331 corresponds to and embeds the positioning marble 5271 in the positioning ring groove, during the process of inserting the cover 53 into the insertion space 523, the quick-insert front sleeve 533 contacts the inner bushing 524 in advance and compresses the plug compression spring 526 during the process of inserting the cover 53 into the insertion space 523 through the opening 521, so that the inner bushing 524 gradually moves toward the inner direction of the insertion space 523, during the moving process, under the condition that the positioning ring groove 5331 on the quick-insert front sleeve 533 corresponds to the mounting hole 5227, the constraint of the positioning marble 5271 at one end of the insertion space 523 is released, and the same positioning marble 5271 correspondingly contacts the constraint of the movable sleeve 5272, so that the movable sleeve 5272 moves under the elastic pushing of the locking spring 5274, and the accommodating ring groove 5273 is gradually dislocated with the mounting hole 5227, during the dislocating process, the positioning marble 5271 is pressed toward the inner direction of the insertion space 523, and the positioning marble 5271 is further inserted into a part of the positioning marble 5271, thereby realizing the firm insertion of the positioning marble 5271 into the insertion space. It will be appreciated that the circumferential surface of the quick plug 71 attached to the flexible cable 7 is also provided with a circumferential groove, so that locking can be performed under the action of the positioning ball 5271, thereby ensuring the stability of the plug. It will be appreciated that when the cover 53 needs to be withdrawn from the plugging space 523, the movable sleeve 5272 needs to compress the locking spring 5274, so that the accommodating ring groove 5273 and the mounting hole 5227 are located at corresponding positions, and the positioning marble 5271 can be withdrawn from the accommodating ring groove 5273, and at this time, the cover 53 or the quick plug 71 can be withdrawn from the plugging space 523.

In this embodiment, in order to ensure that the movable sleeve 5272 is erroneously operated to cause the movable sleeve 5272 to compress the locking spring 5274, so that the positioning marble 5271 can be retracted, and the cover 53 inserted in the insertion space 523 or the quick plug 71 is withdrawn in the insertion space 523, as shown in fig. 4 and 10, a relief groove 5276 is formed at the end of the movable sleeve 5272 away from the positioning member 5275, the relief groove 5276 is formed along the axial direction of the movable sleeve 5272, that is, the relief groove 5276 is elongated, and has an opening above the end surface of the movable sleeve 5272; a positioning pin 5277 is installed on the socket rear sleeve 522 and is located at the rear end of the movable sleeve 5272, the positioning pin 5277 limits the movable sleeve 5272, the movable sleeve 5272 is prevented from overcoming the elastic force of the locking spring 5274 to be certain in the direction of the positioning pin 5277, and therefore misoperation can be avoided, and the positioning marble 5271 is loosened on the component inserted in the insertion space 523. In a state that the movable sleeve 5272 is rotated so that the relief groove 5276 corresponds to the positioning pin 5277, the relief groove 5276 is provided with a space for the positioning pin 5277 to move the movable sleeve 5272 in the axial direction of the socket rear sleeve 522 toward the positioning pin 5277, so that the accommodating ring groove 5273 corresponds to the mounting hole 5227, and the positioning ball 5271 is conveniently contacted to lock the component inserted into the insertion space 523.

In the use process, the locking mechanism 527 can prevent the movable sleeve 5272 from causing the positioning marble 5271 to withdraw in the process of misoperation through the anti-loosening structure, so that the components inserted in the insertion space 523 are loosened.

According to the centrally installed switchgear handcart 1 provided by the embodiment, the quick plug device 5 which is opposite to the contact arm 4 is arranged on the handcart frame 3, the wiring unit 51 of the quick plug device 5 is electrically connected with the contact arm 4 through the conductive copper bar, the interface unit 52 can be plugged with the external bypass flexible cable 7, the centrally installed switchgear handcart 1 is suitable for armored movable metal closed switch equipment (centrally installed switchgear), and the problem that a large area of a user and a long-time power failure are caused by power failure of the load side of a medium-voltage distribution system due to the failure or overhaul of the high-voltage wire inlet cable 62 and the failure or overhaul of the circuit breaker handcart 1 are solved.

The centrally installed switchgear handcart 1 can directly replace the original wire outlet cabinet circuit breaker handcart 1, and also can directly replace the wire inlet cabinet circuit breaker handcart 1, and the centrally installed switchgear 6 does not need any modification, operation mode and interlocking mechanism.

Example 1

In this embodiment, as shown in fig. 1-2, the structure of the handcart 1 is substantially the same as that described above, and in this embodiment, the contact arm 4 is further provided with an insulating member 31, where the insulating member 31 is a covered insulator, and the covered insulator is fixed on the handcart frame 3 by a bolt, and meanwhile, the contact arm 4 is mounted on the covered insulator by a bolt, and correspondingly, the conductive copper bar is connected on the insulator by a bolt, and is connected with the contact arm 4, and in this embodiment, the covered member of the insulator shields the position where the conductive copper bar is connected with the contact arm 4, so as to protect the contact arm.

Example two

In this embodiment, as shown in fig. 1, the structure of the cart 1 is substantially the same as that described above, and only the structure of the cart frame 3 is optimized, and a cover plate 32 is further provided on the cart frame 3, wherein the cover plate 32 is made of a transparent material, and the upper end of the cover plate 32 is hinged on the cart frame 3, so that the interface units 52 can be turned over along the pivot, and the interface units 52 are covered in the process of turning toward the cart frame 3, so that the interface units 52 are protected.

The utility model also provides a bypass uninterrupted power supply system which is used for supplying power to the bypass uninterrupted power supply when the high-voltage main bus fails or overhauls, the high-voltage wire inlet cable fails or overhauls, and a load measuring user can be ensured to avoid the problem of long-time large-area power failure.

As shown in fig. 12-15, a bypass uninterruptible power supply system comprises a centrally installed switchgear 6, a centrally installed switchgear cart 1 and a bypass flexible circuit 7. The middle-placed cabinet 6 is used for power transmission and comprises an instrument room A, a circuit breaker handcart room B, a cable room C connected with a cable and a bus bar room D provided with a bus bar, wherein the circuit breaker handcart room B is provided with an original handcart for electrically connecting the cable and the bus bar;

The centrally installed switchgear handcart 1 is used for replacing the original handcart, and comprises: the chassis car 2, fixed mounting be in handcart frame 3 on the chassis car 2, fixed mounting be in contact arm 4 on the handcart frame 3, still including, fixed mounting be in on the handcart frame 3 and with contact arm 4 corresponds each other and constitutes the quick plug device 5 of relative utmost point, quick plug device 5 is including: a wiring unit 51, wherein the wiring unit 51 is electrically connected with the contact arm 4, and comprises a wiring sleeve 512 and a conductive rod 513 arranged in the wiring sleeve, and two ends of the wiring sleeve 512 respectively form a wiring terminal 514 and a plugging terminal 515; an interface unit 52, wherein a port 521 for plugging is arranged at the front end of the interface unit 52;

the bypass flexible cable 7 is used for power transmission, one end of the bypass flexible cable is fixedly connected with a quick plug connector 71, the quick plug connector 71 is used for being plugged into the mouth 521 of the interface unit 52, and the other end of the bypass flexible cable is used for being electrically connected with external equipment.

In the use process, the normal power supply system is that an original handcart is used in the centrally installed switchgear 6, so that the high-voltage main bus is electrically connected with the high-voltage inlet cable, and power transmission is performed. If the high-voltage main bus is in fault or overhauled, the original handcart in the middle-mounted cabinet 6 is pushed out in the fault or overhauled process of the incoming cable, and is replaced by the middle-mounted handcart 1 with the rapid plug interface device, so that the power supply system is converted into a bypass uninterrupted power supply system.

Specifically, in the bypass uninterruptible power supply system, the centrally installed switchgear handcart 1 is transported to the side of the centrally installed switchgear 6 by a special transport vehicle and pushed into a test position, after the centrally installed switchgear is locked, the quick connector 71 and the mouth 521 of the interface unit 52 are cleaned, and then the quick connector 71 is inserted into the mouth 521 of the interface unit 52 by applying silica gel, so that the flexible cable 7 is electrically connected with the handcart 1.

The middle-placed cabinet handcart 1 is pushed to a working position and locked by rotating a pushing handle above the handcart 1, at the moment, a contact arm 4 of the handcart is mutually spliced with a contact box of a main bus or a cable, at the moment, the other end of the flexible cable 7 is connected with external equipment, and the equipment can be power supply equipment such as a power generation car, a generator and the like or can be connected with a power utilization user for load measurement, so that the problem that a bypass line is not powered off in the process of maintaining or overhauling a medium-high voltage main bus and a medium-high voltage wire feeding cable, and normal power utilization of the power utilization user is ensured, and the occurrence of long-time and large-area power failure is avoided.

It can be understood that the uninterrupted power supply system provided by the embodiment of the utility model is mainly used for realizing uninterrupted power by-pass in the process of failure or maintenance of the main bus or the incoming cable, and can realize uninterrupted power supply in the process of overhauling or maintenance without large-area and long-time power outage, thereby ensuring life production.

In one embodiment, the centrally installed switchgear handcart 1 provided in the embodiment is used as an interface handcart 1 special for an outlet cabinet, as shown in fig. 12-13, so as to solve the problem that a large area and long-time power failure of a user are caused by power failure of a load side of a medium-voltage distribution system due to faults or overhauling of a high-voltage main bus and faults or overhauling of an original handcart.

The circuit scheme of the outlet cabinet comprises a bypass flexible cable 7, a quick plug 71, an outlet cabinet special interface handcart 1 and a centrally installed cabinet 6, wherein an instrument room A, a breaker handcart 1 room B, a cable room C and a bus room D are respectively arranged on the centrally installed cabinet 6, and a lower contact box which is electrically connected with a main cable of the cable room is arranged in the centrally installed cabinet.

In the embodiment, the original handcart 1 of the centrally installed switchgear is operated according to the interlocking misoperation prevention program of the centrally installed switchgear to exit the operation, and the centrally installed switchgear 6 is pulled out by a special transfer trolley.

The special interface handcart 1 of the outgoing line cabinet is transported to the front of the centrally installed switchgear by a special transport vehicle and locked, and the special interface handcart 1 of the outgoing line cabinet is pushed into the breaker chamber of the centrally installed switchgear 6 and locked at the test position of the handcart 1. The bypass flexible cable 7 has one end provided with a quick plug 71 and the other end connected with a power generation device, wherein the power generation device can be a high-voltage power generation vehicle or a power generator, etc., the movable transparent cover plate 32 assembly in the special interface handcart 1 for the outlet cabinet is operated to expose the sealing cover 53 at the bottom position, the sealing cover 53 is pulled out of the body of the interface unit 52, after the quick plug 71 and the mouth 521 of the interface unit 52 are cleaned, a cleaning towel is taken to clean and then the silica gel is smeared, the quick plug 71 is aligned with the mouth 521 of the interface unit 52 and is slowly pressed into the locking position, and the state shown in fig. 12 is completed.

In this embodiment, the pushing mechanism in the chassis 2 in the outlet cabinet special interface handcart 1 is rocked to push the handcart 1 to the working position. After the handcart 1 reaches the working position, the pushing handle is not moved, and the position indicator lamp of the cabinet 6 displays the corresponding position. At this time, the tulip contact 41 on the contact arm 4 is inserted into the lower contact box 61 and abuts against the lower contact therein, thereby completing the state shown in fig. 13.

In the embodiment, the operation method of the special interface handcart 1 for the outlet cabinet is characterized in that under the cooperation of the bypass cable 62 system module, the special interface handcart 1 module for the outlet cabinet and the middle cabinet module, the bypass cable 62 system quick plug connector, the special interface handcart 1 for the outlet cabinet quick plug connector and the middle cabinet 6 movable and static contacts are connected with each other, so that a medium-voltage power generation vehicle can be easily and quickly connected into the cable chamber C of the single-loop outlet cabinet, the problem that the bypass operation cable 62 system cannot be quickly connected into a medium-voltage distribution network system is solved, and the problem that a large area of a user and a long-time power failure are caused by power failure of the load side of the single-loop outlet cabinet of the medium-voltage distribution system when the high-voltage main bus of the medium-voltage distribution network is in fault or overhauling, and the circuit breaker handcart 1 is in fault or overhauling is solved.

In another embodiment, as shown in fig. 14-15, the centrally installed switchgear handcart 1 provided in this embodiment is used as an interface handcart special for an incoming switchgear, as shown in fig. 14-15, the interface handcart 1 special for an incoming switchgear is suitable for an armored movable metal closed switch device (centrally installed switchgear) incoming switchgear, and solves the problem that a large area and long-time power failure of a user are caused by failure or maintenance of a high-voltage incoming cable 62 of the incoming switchgear and failure or maintenance of a main bus of a medium-voltage distribution system caused by failure or maintenance of the circuit breaker handcart 1.

The circuit scheme of the incoming cabinet comprises a bypass flexible cable 7, a quick plug 71, an incoming cabinet special interface handcart 1 and an intermediate cabinet 6, wherein an instrument room A, a breaker handcart 1 room B, a cable room C and a bus room D are respectively arranged on the intermediate cabinet 6, and meanwhile, an upper contact box communicated with the bus room is arranged in the intermediate cabinet.

In the embodiment, the primary circuit breaker handcart 1 of the centrally installed switchgear is operated according to a centrally installed switchgear interlocking misoperation prevention program to exit the operation, and the centrally installed switchgear 6 is pulled out by a special transfer trolley.

The special interface handcart 1 of the incoming line cabinet is transported to the front of the centrally installed switchgear by a special transfer trolley, and the special interface handcart 1 of the outgoing line cabinet is pushed into the breaker chamber of the centrally installed switchgear 6 to be locked at the test position of the handcart 1. One end of the bypass flexible cable 7 is provided with a quick plug 71, and the other end of the bypass flexible cable is connected with electric equipment for load measurement; the movable transparent cover plate 32 assembly in the special interface handcart 1 for the wire inlet cabinet is operated to expose the sealing cover 53 at the bottom position, the sealing cover 53 is pulled out of the interface unit 52 body, after the cleaning towel is taken to clean the quick plug 71 and the opening 521 of the interface unit 52, the silica gel is smeared, the quick plug 71 is aligned with the opening 521 of the interface unit 52 and is slowly pressed into the locking position, and the state shown in fig. 14 is completed.

In this embodiment, the pushing mechanism in the chassis 2 in the special interface handcart 1 of the wire inlet cabinet is rocked to push the handcart 1 to the working position. After the handcart 1 reaches the working position, the pushing handle is not moved, and the position indicator lamp of the cabinet 6 displays the corresponding position. At this time, the tulip contact 41 on the contact arm 4 is inserted into the upper contact box 61 and abuts against the contact located therein, thereby completing the state shown in fig. 15.

In this embodiment, the operation method of the special interface handcart 1 for the incoming line cabinet is that under the cooperation of the bypass cable 62 system module, the special interface handcart 1 module for the incoming line cabinet and the middle cabinet module, the bypass cable 62 system quick plug connector, the special interface handcart 1 for the incoming line cabinet quick plug connector, the middle cabinet 6 movable contact and the fixed contact are connected with each other, so that a medium-voltage power generation vehicle can be easily and quickly connected into the main bus chamber D of the power distribution system, the problem that the bypass operation cable 62 system cannot be quickly connected into the medium-voltage power distribution system is solved, and therefore the problem that a large area of a user is powered off for a long time due to the fact that the medium-voltage power distribution system main bus is caused when the high-voltage incoming cable 62 of the medium-voltage power distribution network is in fault or overhauling, and the circuit breaker handcart 1 is in fault or overhauling is solved.

Under the cooperation of the bypass cable 62 system module, the inlet wire cabinet special interface handcart 1 module and the middle cabinet module, the bypass cable 62 system quick plug connector, the inlet wire cabinet special interface handcart 1 quick plug connector and the middle cabinet 6 movable and static contacts are connected with each other, so that a medium-voltage power generation vehicle can be easily and quickly connected into a main bus room D of a power distribution system, the problem that the bypass operation cable 62 system cannot be quickly connected into the medium-voltage power distribution system is solved, and the problem that a large area of a user is powered off for a long time due to the fact that the main bus of the medium-voltage power distribution system is powered off when the medium-voltage power distribution network high-voltage inlet cable 62 fails or overhauls or the circuit breaker handcart 1 fails is solved.

Various other corresponding changes and modifications will occur to those skilled in the art from the disclosure herein, and all such changes and modifications are intended to be included within the scope of the present utility model.

Claims

1. In put cabinet handcart, it is including: chassis car, fixed mounting be in handcart frame on the chassis car, fixed mounting be in contact arm on the handcart frame, its characterized in that still includes, fixed mounting be in on the handcart frame, and with contact arm corresponds each other and constitute the quick plug device of relative utmost point, quick plug device is including:

2. The centrally installed switchgear handcart according to claim 1, wherein the interface unit comprises a socket rear sleeve sleeved on the plug-in end, the inner wall of the socket rear sleeve and the plug-in end are mutually spaced to form a plug-in space, and the end part of the plug-in space forms the opening part;

3. The centrally installed switchgear trolley of claim 2, wherein the quick connect disconnect device further comprises a cover for closing the mouth of the interface unit, the cover comprising:

4. The centrally installed switchgear handcart according to claim 3, wherein a guide hole is formed in the end face of the conductive rod located on the plug-in end;

5. A mid-ambry handcart according to claim 3, wherein the interface unit further comprises a locking mechanism for locking the cover, comprising:

6. The centrally installed switchgear handcart according to claim 5, wherein said locking mechanism is further provided with a locking structure comprising

the locating pin is located the movable sleeve rear side, installs on the socket rear cover, the movable sleeve is followed socket rear cover circumference rotates when the back-off groove with the locating pin is in corresponding position, the movable sleeve can overcome locking spring's elastic thrust orientation locating pin direction removes, thereby the holding annular with the mounting hole corresponds each other the back-off groove with the locating pin dislocation is time, the locating pin restriction the movable sleeve orientation locating pin direction removes.

7. The centrally installed switchgear handcart according to claim 1, wherein the wiring sleeve is formed by injection molding of an epoxy resin material, the conducting rod is injection molded inside the wiring sleeve, a shielding layer and a sensor electrically connected with the shielding layer are further arranged inside the wiring sleeve, and the other end of the sensor is located outside the wiring sleeve.

8. The centrally installed switchgear trolley of any one of claims 1-7, wherein the contact arm ends are provided with quincuncial heads, the quincuncial heads are clamped into grooves of prime contact arm ends, and the other ends of the quincuncial heads are connected with the wiring terminals through conductive copper bars.

9. The centrally installed switchgear handcart according to claim 8, wherein a covered insulator is further connected to the handcart frame, and the contact arm and the conductive copper bar are screwed together on the covered insulator, and a connection part of the contact arm and the conductive copper bar is shielded.

10. The centrally installed switchgear handcart according to claim 8, wherein a cover plate is further disposed on the handcart frame, and the cover plate is made of transparent material, and one end of the cover plate is hinged on the handcart frame for covering the interface unit.

11. A bypass uninterrupted power supply system is characterized by comprising

a mid-ambry handcart according to claim 1, for replacing said original handcart;

the bypass flexible cable is used for power transmission, one end of the bypass flexible cable is fixedly connected with a quick plug connector, the quick plug connector is used for being plugged into the mouth of the interface unit of the centrally installed switchgear handcart, and the other end of the bypass flexible cable is used for being electrically connected with external equipment.

12. The bypass uninterruptible power supply system of claim 11, wherein an upper contact box electrically connected with a busbar of the busbar chamber is arranged in the centrally installed switchgear, and contacts are arranged in the upper contact box, and after the centrally installed switchgear handcart is pushed to a working position, the contact arms are inserted into the upper contact box and are abutted with the contacts, so that the uninterruptible power supply system on a power supply side is formed.

13. The bypass uninterruptible power supply system of claim 11, wherein a lower contact box electrically connected with a cable of the cable chamber is arranged in the centrally installed switchgear, and contacts are arranged in the lower contact box, and after the centrally installed switchgear handcart is pushed to a working position, the contact arms are inserted into the lower contact box and are abutted against the contacts, so that the load uninterruptible power supply system is formed.