CN220895400U - Load disconnecting link and switch cabinet - Google Patents

Abstract

The utility model discloses a load disconnecting link and a switch cabinet, wherein the load disconnecting link comprises an arc extinguishing device, an arc striking rod, a transmission device and a main disconnecting link, the arc striking rod is provided with a contact position and an arc pulling position, the arc striking rod is in transmission connection with the transmission device, the main disconnecting link is positioned outside the arc extinguishing device, the main disconnecting link comprises a main contact and a moving contact, the moving contact is provided with a closing position and a separating brake position, the moving contact is in transmission connection with the transmission device, the load disconnecting link is provided with a closing state and a separating brake state, and when the load disconnecting link is switched to the separating brake state, the transmission device firstly drives the moving contact to be switched from the closing position to the separating brake position and then switches the arc striking rod from the contact position to the arc pulling position; when the load disconnecting link is switched to a closing state, the transmission device drives the arc striking rod to switch from an arc striking position to a contact position, and then switches the moving contact from a switching-off position to a switching-on position. The arrangement ensures that the action of the striking rod is always later than that of the moving contact, and the arc is generated in the arc extinguishing device to achieve the arc extinguishing effect.

Description

Load disconnecting link and switch cabinet

Technical Field

The utility model relates to the technical field of power equipment, in particular to a load disconnecting link and a switch cabinet.

Background

With the continuous development of rail transit, the traction power supply mode of urban rail transit is also continuously improved and perfected. At present, in order to ensure the stability of subway operation, the condition that the subway stops due to the faults of a traction substation is avoided, and a bilateral power supply mode is adopted on a positive line. The electric arm of the electric locomotive adopting the bilateral power supply can receive power from two traction substation. In this way, the traction substation needs to be powered off, which will affect the running efficiency. In order to solve the problem, a large bilateral non-stop electric knife switch system is proposed in the industry at present, namely a load switch is selected to replace a common cross-region isolating switch. Therefore, the load switch becomes a core component of the bilateral uninterrupted switch system, and visual monitoring is needed to be carried out on the load switch so as to avoid potential safety hazards.

However, in the prior art, a common isolating switch is connected in series on the line of the direct current breaker so as to form an obvious breakpoint for visual monitoring. On the one hand, the cost is increased due to the addition of the isolating switch. On the other hand, electrical and mechanical interlocking must be designed between the disconnector and the circuit breaker. Because the isolating switch does not have the function of breaking with load, the isolating switch must be firstly opened and then opened in the opening process. In the switching-on process, the isolating switch is switched on firstly, and then the breaker is switched on. The switching-on and switching-off between the breaker and the isolating switch are in sequence, and the problem of error control prevention exists, so that the whole system is complex due to the increase of the interlocking, and the reliability is reduced.

Disclosure of utility model

The utility model mainly aims to provide a load disconnecting link, which aims to drive an arc striking rod and a moving contact to move through a transmission device, so that the action of the arc striking rod is always later than that of the moving contact.

In order to achieve the purpose, the load disconnecting link provided by the utility model comprises an arc extinguishing device, an arc striking rod, a transmission device and a main disconnecting link; wherein,

The arc striking rod is provided with a contact position and an arc striking position, the arc striking rod is in transmission connection with the transmission device, and when the arc striking rod is positioned at the contact position, the arc striking rod is electrically connected with an arc contact of the arc extinguishing device; when the arc striking rod is positioned at the arc striking position, the arc striking rod is disconnected with an arc contact of the arc extinguishing device;

The main switch is positioned outside the arc extinguishing device and comprises a main contact and a moving contact, the moving contact is provided with a switching-on position and a switching-off position, the moving contact is in transmission connection with the transmission device, and when the moving contact is positioned at the switching-on position, the moving contact is electrically connected with the main contact; when the movable contact is positioned at the opening position, the movable contact is disconnected with the main contact;

The load disconnecting link is provided with a closing state and a disconnecting state, and when the load disconnecting link is switched to the disconnecting state, the transmission device drives the moving contact to be switched from the closing position to the disconnecting position and then switches the arc striking rod from the contact position to the arc striking position; when the load disconnecting link is switched to a closing state, the transmission device drives the arc striking rod to be switched from the arc striking position to the contact position, and then switches the moving contact from the opening position to the closing position.

In some embodiments of the utility model, the transmission comprises a spindle, a transmission rod, a connecting rod, a spindle crank, and an arc extinguishing connecting rod;

The transmission rod and the rotating shaft crank are coaxially connected with the main shaft, and the connecting rod is in transmission connection with one end of the transmission rod far away from the main shaft;

The arc-extinguishing connecting rod is provided with a sliding groove, the sliding groove extends along the length direction of the arc-extinguishing connecting rod, one end of the rotating shaft crank, which is far away from the main shaft, is movably arranged in the sliding groove, and the rotating shaft crank can move along the extending direction of the sliding groove;

And one end of the arc extinguishing connecting rod, which is far away from the rotating shaft crank, is in transmission connection with the arc striking rod.

In some embodiments of the present utility model, the number of the arc extinguishing connecting rods is two, the two arc extinguishing connecting rods are arranged at intervals along the axial direction of the main shaft, the sliding grooves are arranged on two opposite surfaces of the two arc extinguishing connecting rods in a penetrating manner, the rotating shaft cranks are movably connected with the two sliding grooves, the arc striking rod is located between the two arc extinguishing connecting rods, and the arc striking rod is in transmission connection with the two arc extinguishing connecting rods.

In some embodiments of the present utility model, the load disconnecting link further includes a bracket, the main shaft and the arc extinguishing connecting rod are movably mounted on the bracket, the transmission device further includes a limiting pin and a limiting rod, two ends of the limiting pin are respectively mounted on opposite surfaces of the two arc extinguishing connecting rods, and the limiting rod is fixedly mounted on the bracket;

When the arc striking rod is positioned at the contact position, the limiting pin and the limiting rod are arranged at intervals; when the arc striking rod is positioned at the arc striking position, the limiting pin is in abutting connection with the limiting rod.

In some embodiments of the present utility model, the load switch includes a spring operating assembly for storing or releasing energy to switch the load switch between a closed state and an open state, and a driving member in driving connection with the spring operating assembly, the driving member being for driving the spring operating assembly to store or release energy, and the spindle passing through the spring operating assembly and the driving member.

In some embodiments of the utility model, the arc extinguishing device comprises a housing, an arc chute, a front arc slider, an electromagnetic assembly, and a rear arc slider;

The shell is provided with an installation cavity with two open ends, one end of the installation cavity is provided with the arc extinguishing grid, the electromagnetic assembly is installed at one end of the installation cavity, which is far away from the arc extinguishing grid, of the installation cavity, one end of the front arc sliding block is abutted with the electromagnetic assembly, and the other end of the front arc sliding block is abutted with the arc extinguishing grid;

The rear arc slide block is abutted with the surface, far away from the front arc slide block, of the arc extinguishing grid, and the rear arc slide block and the front arc slide block are arranged at intervals.

In some embodiments of the present utility model, the front arc slider includes a body and an arc burning block, the body is abutted with the electromagnetic assembly, one end of the arc burning block is detachably connected with the body, and the other end of the arc burning block is abutted with the arc extinguishing gate.

In some embodiments of the utility model, the arc chute is removably mounted to the mounting cavity.

The utility model also provides a switch cabinet, which comprises a cabinet body and a load knife switch, wherein the load knife switch comprises an arc extinguishing device, an arc striking rod, a transmission device and a main knife switch,

The arc striking rod is provided with a contact position and an arc striking position, the arc striking rod is in transmission connection with the transmission device, and when the arc striking rod is positioned at the contact position, the arc striking rod is electrically connected with an arc contact of the arc extinguishing device; when the arc striking rod is positioned at the arc striking position, the arc striking rod is disconnected with an arc contact of the arc extinguishing device;

The main switch is positioned outside the arc extinguishing device and comprises a main contact and a moving contact, the moving contact is provided with a switching-on position and a switching-off position, the moving contact is in transmission connection with the transmission device, and when the moving contact is positioned at the switching-on position, the moving contact is electrically connected with the main contact; when the movable contact is positioned at the opening position, the movable contact is disconnected with the main contact;

The load disconnecting link is provided with a closing state and a disconnecting state, and when the load disconnecting link is switched to the disconnecting state, the transmission device drives the moving contact to be switched from the closing position to the disconnecting position and then switches the arc striking rod from the contact position to the arc striking position; when the load disconnecting link is switched to a closing state, the transmission device drives the arc striking rod to be switched from the arc striking position to the contact position, and then switches the moving contact from the opening position to the closing position;

the cabinet body is provided with a cavity, and the load disconnecting link is arranged in the cavity.

In some embodiments of the utility model, the switch cabinet further comprises a first camera device, a controller and a display screen; the first camera device is arranged outside the arc extinguishing device and is used for collecting image information of the moving contact and the main contact fracture; the controller is electrically connected with the transmission device and the first camera device; the display screen is electrically connected with the first camera device and is used for displaying image information acquired by the first camera device; and/or the number of the groups of groups,

The switch cabinet further comprises a cabinet door for opening or closing the cavity, the cabinet door is provided with an observation window, and the observation window corresponds to the positions of the moving contact and the main contact fracture.

According to the technical scheme, the arc striking rod and the moving contact are driven to move by the transmission device, the transmission device is in transmission connection with the arc striking rod, so that the arc striking rod has a contact position and an arc striking position, and when the arc striking rod is positioned at the contact position, the arc striking rod is electrically connected with the arc contact of the arc extinguishing device; when the arc striking rod is positioned at the arc striking position, the arc striking rod is disconnected with an arc contact of the arc extinguishing device; the main disconnecting link is positioned outside the arc extinguishing device and comprises a main contact and a moving contact, wherein the moving contact is in transmission connection with the transmission device, so that the moving contact has a closing position and a separating position, and when the moving contact is positioned at the closing position, the moving contact is electrically connected with the main contact; when the movable contact is positioned at the opening position, the movable contact is disconnected with the main contact; the load disconnecting link is provided with a closing state and a disconnecting state, and when the load disconnecting link is switched to the disconnecting state, the transmission device firstly drives the moving contact to switch from a closing position to a disconnecting position and then switches the arc striking rod from a contact position to an arc striking position; when the load disconnecting link is switched to a closing state, the transmission device drives the arc striking rod to switch from an arc striking position to a contact position, and then switches the moving contact from a switching-off position to a switching-on position. So set up, only need through transmission drive arc striking pole and moving contact motion to reduce isolator's setting, and then reduced the cost of load switch, simultaneously, through transmission pivoted mechanical structure design, realize that the main switch divides earlier, the function of branch behind the arc extinguishing contact, thereby ensure the motion sequence of main contact and arc striking pole, and then avoid preventing the mistake control problem, improved the reliability of load switch.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an embodiment of a load switch of the present utility model;

FIG. 2 is a schematic view of a part of the structure of FIG. 1;

FIG. 3 is a partial schematic view of the structure of FIG. 2;

Fig. 4 is a schematic view of a partial structure of the load knife switch in fig. 1 in a closed state;

fig. 5 is an exploded view of the arc extinguishing device of fig. 1;

FIG. 6 is a schematic view of the front arc runner of FIG. 5;

Fig. 7 is a schematic structural diagram of an embodiment of the switch cabinet of the present utility model.

Reference numerals illustrate:

Reference numerals	Name of the name	Reference numerals	Name of the name
				100	Arc extinguishing device	340	Rotating shaft crank
110	Outer casing	350	Arc extinguishing connecting rod
				111	Mounting cavity	351	Sliding groove
112	Left cover plate	360	Limiting pin
				113	Right cover plate	370	Limiting rod
120	Arc extinguishing grid	400	Main knife switch
				130	Front arc slider	410	Main contact
131	Body	420	Moving contact
				132	Arc burning block	500	Support frame
140	Electromagnetic assembly	600	Spring operating assembly
				150	Rear arc slider	700	Driving piece
200	Arc striking rod	800	Cabinet body
				300	Transmission device	810	Chamber chamber
310	Main shaft	900	Cabinet door
				320	Transmission rod	910	Viewing window
330	Connecting rod

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the technical solutions should be considered that the combination does not exist and is not within the scope of protection claimed by the present utility model.

Referring to fig. 1 to 4, the present utility model provides a load switch, which includes an arc extinguishing device 100, an arc striking rod 200, a transmission device 300 and a main switch 400; the striking rod 200 is in transmission connection with the transmission device 300, the main switch 400 is located outside the arc extinguishing device 100, the main switch 400 comprises a main contact 410 and a moving contact 420, and the moving contact 420 is in transmission connection with the transmission device 300.

The arc extinguishing device 100 may be of various types, and the arc extinguishing device 100 may be configured to perform arc extinguishing by magnetic quenching, the arc extinguishing device 100 may be configured to cut an arc into a plurality of short arcs by a metal grid, and the arc extinguishing device 100 may be configured to perform arc extinguishing by a cooling method, which is not shown here.

The striking rod 200 has a contact position and an arc striking position, and when the striking rod 200 is positioned at the contact position, the striking rod 200 is electrically connected with the arc contact of the arc extinguishing device 100; when the striking rod 200 is positioned at the striking position, the striking rod 200 is disconnected from the arc contact of the arc extinguishing device 100. The movement of the striking rod 200 may be varied, the striking rod 200 may be rotated relative to the arc extinguishing device 100, or the striking rod 200 may be slid relative to the arc extinguishing link 350, which is not particularly limited herein.

The moving contact 420 has a closing position and a separating position, and when the moving contact 420 is located at the closing position, the moving contact 420 is electrically connected with the main contact 410; when the movable contact 420 is located at the opening position, the movable contact 420 is disconnected from the main contact 410; the moving contact 420 may be rotated with respect to the main contact 410, and the moving contact 420 may also be slid with respect to the main contact 410, which is not particularly limited herein.

The load disconnecting link has a closing state and a disconnecting state, when the load disconnecting link is switched to the disconnecting state, the transmission device 300 firstly drives the moving contact 420 to switch from a closing position to a disconnecting position and then switches the arc striking rod 200 from a contact position to an arc striking position; when the load disconnecting link is switched to the closing state, the transmission device 300 drives the arc striking rod 200 to switch from the arc striking position to the contact position, and then switches the moving contact 420 from the opening position to the closing position.

The transmission device 300 can be composed of two driving motors and a controller, wherein the two driving motors are respectively connected with the arc striking rod 200 and the moving contact 420 in a transmission way and are electrically connected with the controller, and the controller controls the two driving motors to work so that the motion of the arc striking rod 200 and the moving contact 420 has a sequence; the transmission device 300 may also be composed of a sliding block and a driving motor, wherein the sliding block is provided with a movable groove, the arc striking rod 200 is movably arranged in the movable groove, the moving contact 420 is arranged on the surface of the sliding block, the driving motor is in transmission connection with the sliding block, the sliding block can push the moving contact 420 to move through the arrangement of the movable groove, and then the sliding block pushes the arc striking rod 200 to move after the groove wall of the movable groove is abutted with the arc striking rod 200, so that the movement of the arc striking rod 200 and the movement of the moving contact 420 are in sequence; this is not a list.

The main switch 400 is located outside the arc extinguishing device 100 such that a worker can observe the state of the main switch 400 by naked eyes. When the main knife switch 400 is in the switch-off state, the main knife switch 400 can form an obvious breakpoint to ensure complete power off of the circuit, and the arc extinguishing device 100 has the function of realizing arc extinguishing under the load condition breaking.

According to the technical scheme, the arc striking rod 200 and the moving contact 420 are driven to move by the transmission device 300, the transmission device 300 is in transmission connection with the arc striking rod 200, so that the arc striking rod 200 has a contact position and an arc striking position, and when the arc striking rod 200 is positioned at the contact position, the arc striking rod 200 is electrically connected with the arc contact of the arc extinguishing device 100; when the arc striking rod 200 is positioned at the arc striking position, the arc striking rod 200 is disconnected with the arc contact of the arc extinguishing device 100; the main switch 400 is located outside the arc extinguishing device 100, the main switch 400 includes a main contact 410 and a moving contact 420, the moving contact 420 is in transmission connection with the transmission device 300, so that the moving contact 420 has a closing position and an opening position, and when the moving contact 420 is located at the closing position, the moving contact 420 is electrically connected with the main contact 410; when the movable contact 420 is located at the opening position, the movable contact 420 is disconnected from the main contact 410; the load disconnecting link has a closing state and a disconnecting state, and when the load disconnecting link is switched to the disconnecting state, the transmission device 300 drives the moving contact 420 to switch from a closing position to a disconnecting position and then switches the arc striking rod 200 from a contact position to an arc striking position; when the load switch is switched to the on state, the transmission device 300 drives the arc striking rod 200 to switch from the arc striking position to the contact position, and then switches the moving contact 420 from the off position to the on position.

So set up, only need through transmission 300 drive striking rod 200 and moving contact 420 motion to reduce isolator's setting, and then reduced the cost of load switch, simultaneously, through transmission pivoted mechanical structure design, realize that main switch 400 divides earlier, the function of branch behind the arc extinguishing contact, thereby ensure the motion sequence of main contact 410 and striking rod 200, and then avoid preventing the mistake control problem, improved the reliability of load switch.

Referring to fig. 1 to 4, in some embodiments of the present utility model, the transmission device 300 includes a main shaft 310, a transmission rod 320, a connecting rod 330, a rotating shaft crank 340 and an arc extinguishing connecting rod 350; the transmission rod 320 and the rotating shaft crank 340 are coaxially connected with the main shaft 310, and the connecting rod 330 is in transmission connection with one end of the transmission rod 320 far away from the main shaft 310; the arc extinguishing connecting rod 350 is provided with a sliding groove 351, the sliding groove 351 extends along the length direction of the arc extinguishing connecting rod 350, one end of the rotating shaft crank 340 away from the main shaft 310 is movably arranged in the sliding groove 351, and the rotating shaft crank 340 can move along the extending direction of the sliding groove 351; the end of the arc extinguishing link 350 remote from the rotary shaft crank 340 is in driving connection with the arc striking rod 200.

In this way, the spindle 310 rotates to drive the rotating shaft crank 340 and the transmission rod 320 to rotate, and since the rotating shaft crank 340 is connected with the arc extinguishing connecting rod 350 through the sliding groove 351, the rotating shaft crank 340 will drive the arc extinguishing connecting rod 350 to move until the groove wall of the sliding groove 351 is abutted with the rotating shaft crank 340, and then the arc extinguishing connecting rod 350 moves to drive the arc striking rod 200 to move, so that the arc striking rod 200 and the moving contact 420 move in sequence.

Specifically, referring to fig. 1 to 4, the number of arc extinguishing links 350 is two, the two arc extinguishing links 350 are disposed at intervals along the axial direction of the spindle 310, sliding grooves 351 are disposed on opposite surfaces of the two arc extinguishing links 350, the rotating shaft cranks 340 are movably connected with the two sliding grooves 351, the arc striking rod 200 is located between the two arc extinguishing links 350, and the arc striking rod 200 is in transmission connection with the two arc extinguishing links 350. So set up, two arc extinguishing connecting rods 350 centre gripping striking rod 200 drives striking rod 200 motion to make the motion of striking rod 200 more stable.

Further, referring to fig. 1 to 4, the load switch further includes a bracket 500, the main shaft 310 and the arc extinguishing connecting rods 350 are movably mounted on the bracket 500, the transmission device 300 further includes a limiting pin 360 and a limiting rod 370, two ends of the limiting pin 360 are respectively mounted on opposite surfaces of the arc extinguishing connecting rods 350, and the limiting rod 370 is fixedly mounted on the bracket 500; when the striking rod 200 is at the contact position, the limiting pin 360 and the limiting rod 370 are spaced apart; when the striking rod 200 is positioned at the striking position, the limiting pin 360 is abutted against the limiting rod 370. So set up, avoid arc extinguishing connecting rod 350 motion stroke too big through the setting of spacer pin 360 and gag lever post 370 to lead to the excessive motion of striking rod 200 so that striking rod 200 and arc extinguishing device 100 take place to interfere, and then lead to striking rod 200 or arc extinguishing device 100 to damage.

Referring to fig. 1 to 4, in some embodiments of the present utility model, the load switch includes a spring operating assembly 600 and a driving member 700, the spring operating assembly 600 is used for storing or releasing energy to switch the load switch between a closed state and an open state, the driving member 700 is in transmission connection with the spring operating assembly 600, the driving member 700 is used for driving the spring operating assembly 600 to store or release energy, and the spindle 310 is disposed through the spring operating assembly 600 and the driving member 700. With this arrangement, the spring operating mechanism is coaxial with the main rotating shaft 310 of the main switch 400 and the main rotating shaft 310 of the arc striking rod 200 inside the arc extinguishing device 100, and the spring operating mechanism acts rapidly to drive the main switch 400 and the arc striking rod 200 to perform rapid opening and closing operations. The driving member 700 moves to drive the spring operating mechanism to store energy, the spring operating mechanism full of energy is released under the action of inertia, and the main shaft 310 rotates rapidly under the action of the spring operating mechanism, and drives the moving contact 420 and the arc striking rod 200 to move rapidly.

Referring to fig. 1 to 6, in some embodiments of the present utility model, the arc extinguishing device 100 includes a housing 110, an arc chute 120, a front arc slider 130, an electromagnetic assembly 140, and a rear arc slider 150; the housing 110 has a mounting cavity 111 with two open ends, an arc extinguishing grid 120 is arranged at one open end of the mounting cavity 111, the electromagnetic component 140 is mounted at one open end of the mounting cavity 111 far away from the arc extinguishing grid 120, one end of the front arc sliding block 130 is abutted with the electromagnetic component 140, and the other end of the front arc sliding block 130 is abutted with the arc extinguishing grid 120; the rear arc runner 150 abuts against a surface of the arc chute 120 remote from the front arc runner 130, and the rear arc runner 150 is spaced apart from the front arc runner 130.

So configured, the arc contacts of the arc extinguishing device 100 are operative to draw a load current into the installation cavity 111 after the main switch 400 is opened, and then the arc striking rod 200 is pulled apart and forms an arc under the action of the transmission device 300, the arc is blown into the arc extinguishing grid 120 by the electromagnetic assembly 140, and the arc extinguishing grid 120 elongates and cools the arc, so that natural extinction is achieved in the air.

Considering that the end of the front arc slider 130 is easy to burn out, referring to fig. 6, the front arc slider 130 includes a body 131 and an arc burning block 132, the body 131 is abutted against the electromagnetic assembly 140, one end of the arc burning block 132 is detachably connected with the body 131, and the other end of the arc burning block 132 is abutted against the arc extinguishing grid 120. So set up, this preceding electric arc slider 130 adopts body 131 and burns arc piece 132 to make burn arc piece 132 for the end of preceding electric arc slider 130, and then when the end of preceding electric arc module burns out only need change burn arc piece 132 can, just so reduced the maintenance cost of load switch.

Considering that the housing 110 is a wearing part in the load switch, referring to fig. 6, the housing 110 includes a left cover plate 112 and a right cover plate 113, the left cover plate 112 and the right cover plate 113 enclose a mounting cavity 111, and the left cover plate 112 is detachably connected with the right cover plate 113.

Further, the left cover plate 112 is symmetrically disposed with the right cover plate 113. So set up for whole shell 110 just the part quantity is few, simple structure, and is with low costs.

Referring to fig. 1 to 6, in some embodiments of the present utility model, the arc chute 120 is detachably mounted in the mounting cavity 111. By the arrangement, the arc extinguishing bars 120 can be independently maintained and replaced, so that the maintenance performance of the load disconnecting link is improved.

Referring to fig. 7, the present utility model further provides a switch cabinet, which includes a cabinet body 800 and a load switch, and the specific structure of the load switch refers to the above embodiments. Wherein the cabinet 800 is provided with a chamber 810, and the load switch is installed in the chamber 810.

In some embodiments of the utility model, the switch cabinet further comprises a first camera device not shown, a controller not shown, and a display screen not shown; the first camera device is installed outside the arc extinguishing device 100, and is used for collecting image information of the fracture of the moving contact 420 and the main contact 410; the controller is electrically connected with the transmission device 300 and the first camera device; the display screen is electrically connected with the first camera device and is used for displaying image information acquired by the first camera device. By the arrangement, a worker can check the image information of the ports of the movable contact 420 and the main contact 410 through the display screen, so that the state of the load disconnecting link can be known rapidly.

Referring to fig. 7, the switchgear further includes a cabinet door 900 for opening or closing the chamber 810, and the cabinet door 900 is provided with a viewing window 910, and the viewing window 910 corresponds to the position of the fracture of the moving contact 420 and the main contact 410. So set up, isolate arc extinguishing device 100, striking rod 200, transmission 300 and main switch 400 with external environment through cabinet body 800 to cabinet body 800 plays the effect of protection to arc extinguishing device 100, striking rod 200, transmission 300 and main switch 400, and the staff can observe the position of moving contact 420 and main contact 410 fracture through observation window 910 simultaneously, thereby quick knowing the state of load switch.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (10)

1. The load disconnecting link is characterized by comprising an arc extinguishing device, an arc striking rod, a transmission device and a main disconnecting link; wherein,

The arc striking rod is provided with a contact position and an arc striking position, the arc striking rod is in transmission connection with the transmission device, and when the arc striking rod is positioned at the contact position, the arc striking rod is electrically connected with an arc contact of the arc extinguishing device; when the arc striking rod is positioned at the arc striking position, the arc striking rod is disconnected with an arc contact of the arc extinguishing device;

The main switch is positioned outside the arc extinguishing device and comprises a main contact and a moving contact, the moving contact is provided with a switching-on position and a switching-off position, the moving contact is in transmission connection with the transmission device, and when the moving contact is positioned at the switching-on position, the moving contact is electrically connected with the main contact; when the movable contact is positioned at the opening position, the movable contact is disconnected with the main contact;

The load disconnecting link is provided with a closing state and a disconnecting state, and when the load disconnecting link is switched to the disconnecting state, the transmission device drives the moving contact to be switched from the closing position to the disconnecting position and then switches the arc striking rod from the contact position to the arc striking position; when the load disconnecting link is switched to a closing state, the transmission device drives the arc striking rod to be switched from the arc striking position to the contact position, and then switches the moving contact from the opening position to the closing position.

2. The load knife switch of claim 1, wherein the transmission comprises a spindle, a transmission rod, a connecting rod, a spindle crank, and an arc extinguishing connecting rod;

The transmission rod and the rotating shaft crank are coaxially connected with the main shaft, and the connecting rod is in transmission connection with one end of the transmission rod far away from the main shaft;

The arc-extinguishing connecting rod is provided with a sliding groove, the sliding groove extends along the length direction of the arc-extinguishing connecting rod, one end of the rotating shaft crank, which is far away from the main shaft, is movably arranged in the sliding groove, and the rotating shaft crank can move along the extending direction of the sliding groove;

And one end of the arc extinguishing connecting rod, which is far away from the rotating shaft crank, is in transmission connection with the arc striking rod.

3. The load knife switch of claim 2, wherein the number of the arc extinguishing connecting rods is two, the two arc extinguishing connecting rods are arranged at intervals along the axial direction of the main shaft, the sliding grooves are formed in the two opposite surfaces of the two arc extinguishing connecting rods in a penetrating manner, the rotating shaft cranks are movably connected with the two sliding grooves, the arc striking rods are located between the two arc extinguishing connecting rods, and the arc striking rods are in transmission connection with the two arc extinguishing rods.

4. The load disconnecting link of claim 3, further comprising a bracket, wherein the main shaft and the arc extinguishing connecting rods are movably mounted on the bracket, the transmission device further comprises a limiting pin and a limiting rod, two ends of the limiting pin are respectively mounted on the opposite surfaces of the two arc extinguishing connecting rods, and the limiting rod is fixedly mounted on the bracket;

When the arc striking rod is positioned at the contact position, the limiting pin and the limiting rod are arranged at intervals; when the arc striking rod is positioned at the arc striking position, the limiting pin is in abutting connection with the limiting rod.

5. The load knife switch of claim 2, wherein the load knife switch comprises a spring operating assembly and a driving member, the spring operating assembly is used for storing or releasing energy to enable the load knife switch to be switched between a closing state and a separating state, the driving member is in transmission connection with the spring operating assembly, the driving member is used for driving the spring operating assembly to store or release energy, and the main shaft penetrates through the spring operating assembly and the driving member.

6. The load knife switch of claim 1, wherein the arc extinguishing device comprises a housing, an arc chute, a front arc runner, an electromagnetic assembly, and a rear arc runner;

The shell is provided with an installation cavity with two open ends, one end of the installation cavity is provided with the arc extinguishing grid, the electromagnetic assembly is installed at one end of the installation cavity, which is far away from the arc extinguishing grid, of the installation cavity, one end of the front arc sliding block is abutted with the electromagnetic assembly, and the other end of the front arc sliding block is abutted with the arc extinguishing grid;

The rear arc slide block is abutted with the surface, far away from the front arc slide block, of the arc extinguishing grid, and the rear arc slide block and the front arc slide block are arranged at intervals.

7. The load knife switch of claim 6, wherein the front arc slider comprises a body and an arc burning block, the body is abutted with the electromagnetic assembly, one end of the arc burning block is detachably connected with the body, and the other end of the arc burning block is abutted with the arc extinguishing gate.

8. The load blade of claim 6, wherein the arc chute is removably mounted to the mounting cavity.

9. A switchgear characterized in that it comprises a cabinet body provided with a chamber and a load switch according to any one of claims 1 to 8, said load switch being mounted in said chamber.

10. The switchgear cabinet of claim 9 further comprising a first camera device, a controller, and a display screen; the first camera device is arranged outside the arc extinguishing device and is used for collecting image information of the moving contact and the main contact fracture; the controller is electrically connected with the transmission device and the first camera device; the display screen is electrically connected with the first camera device and is used for displaying image information acquired by the first camera device; and/or the number of the groups of groups,

The switch cabinet further comprises a cabinet door for opening or closing the cavity, the cabinet door is provided with an observation window, and the observation window corresponds to the positions of the moving contact and the main contact fracture.