CN216528699U

CN216528699U - Overcurrent protection setting device

Info

Publication number: CN216528699U
Application number: CN202122752886.3U
Authority: CN
Inventors: 黄文智; 江阳; 涂勇; 曹金林; 王超; 朱朋强
Original assignee: Wuhan Broad Switchgear Co ltd
Current assignee: Wuhan Broad Switchgear Co ltd
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-05-13
Anticipated expiration: 2031-11-10

Abstract

The utility model relates to the technical field of automatic power distribution system protection, and designs an over-current protection setting device through reasonable planning so as to improve the action time and the sensitivity of current protection. Produce subassembly, pulling force including insulating seat, magnetic force and provide subassembly, rotatory subassembly and the yoke that triggers, magnetic force produces the unit mount and is in on the insulating seat, the both sides of insulating seat are fixed with the curb plate respectively, rotatory subassembly that triggers rotates to be connected two the medial surface upper portion of curb plate, and two the top of curb plate is equipped with the limiting plate, the pulling force provides the unit mount and is in on the limiting plate, just the pulling force provide the other end of subassembly with rotatory subassembly that triggers is connected, yoke fixed connection be in the other end of rotatory subassembly that triggers, the yoke is in magnetic force produces the magnetic force of subassembly down with the curb plate laminating or be in the pulling force provide the subassembly under the pulling force with the curb plate separation.

Description

Overcurrent protection setting device

Technical Field

The utility model relates to the technical field of automatic power distribution system protection, in particular to a setting device for over-current protection, which can solve the problems of insensitive response and low reliability of the existing current protection device.

Background

The degree of automation of modern power grids is higher and higher, and the use types of various components such as switches are more and more complete. However, depending on the actual electricity environment and the actual usage, an overcurrent fault often occurs during the electricity usage. The long-time overcurrent fault can cause serious insulation damage to the insulating part and the switch, and the reliable operation of the switch product is seriously influenced.

In view of the above situation, most of the current overcurrent protection devices are applied to system protection, and a common mode is a mode in which a current transformer is used in cooperation with a circuit breaker. For example, a B-type leakage circuit breaker with overcurrent protection disclosed in chinese utility model patent ZL202021334555.7 and an overcurrent protection device of a circuit breaker disclosed in chinese utility model patent ZL201520024557.9, etc. all adopt the circuit breaker to perform overcurrent protection. However, the protection mode that the current transformer is matched with the circuit breaker for use has the following disadvantages: when overcurrent occurs, the time of the protection response of the circuit breaker is long, which is not beneficial to the quick disconnection of fault current; meanwhile, the mutual inductor is too large in size, not only occupies a large amount of space, but also is inconvenient to install and replace.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide an overcurrent protection setting device to solve the problems that a current protection device in the prior art is insensitive in response and low in reliability.

The technical scheme adopted by the utility model to achieve the technical purpose is as follows:

the utility model provides an overcurrent protection setting device which comprises an insulating seat, a magnetic force generating assembly, a tension providing assembly, a rotary triggering assembly and a magnet yoke, wherein the magnetic force generating assembly is installed on the insulating seat, side plates are respectively fixed on two sides of the insulating seat, the rotary triggering assembly is rotatably connected to the upper parts of the inner side surfaces of the two side plates, a limiting plate is arranged at the top of each side plate, the tension providing assembly is installed on the limiting plate, the other end of the tension providing assembly is connected with the rotary triggering assembly, the magnet yoke is fixedly connected to the other end of the rotary triggering assembly, and the magnet yoke is attached to the side plates under the magnetic force action of the magnetic force generating assembly or separated from the side plates under the tension action of the tension providing assembly.

Preferably, the insulating base is of an I-shaped barrel-shaped structure.

Preferably, the magnetic force generating assembly includes an iron core disposed in an inner circumferential surface of the i-shaped barrel structure, and a coil wound on an outer circumferential surface of the i-shaped barrel structure.

Preferably, the coil is a rectangular spiral row coil, hooks are arranged at two ends of the rectangular spiral row coil and are used for being connected with an external cable or a busbar.

Preferably, the rotary triggering assembly comprises a rotating shaft and a supporting piece, the two ends of the rotating shaft are respectively and rotatably connected to the inner side surfaces of the two side plates, and the two ends of the supporting piece are respectively provided with a connecting block which is used for being rotatably connected with the rotating shaft.

As preferred, support piece divide into first installation department, connecting portion and second installation department from top to bottom, first installation department through set up at its both ends the connecting hole with the pulling force provides the subassembly and is connected, offer the slotted hole that is used for connecting the outside warning part that triggers on the connecting portion, the yoke is fixed to be set up the medial surface of second installation department, the connecting block sets up first installation department with between the connecting portion.

Preferably, the connecting portion has an arc structure that gradually bulges from a bottom end of the first mounting portion to a top end of the second mounting portion.

Preferably, the pulling force provides the subassembly and includes support, knob, slide mechanism and spring, the support level sets up, just the one end fixed mounting of support is in the upper surface of limiting plate, the knob sets up the other end of support, slide mechanism is movably to be set up on the support, slide mechanism's one end with the knob is connected, slide mechanism's the other end with spring fixed connection, the tensile end of spring is connected on the rotatory trigger subassembly.

Preferably, the sliding mechanism comprises a sliding block and a screw rod, the upper end of the sliding block is connected to the support in a sliding mode, the lower end of the sliding block is fixedly connected to the spring, one end of the screw rod is connected to the knob in a matched mode, and the other end of the screw rod is fixedly connected with the sliding block.

Preferably, the limiting plate is provided with a notch facilitating the rotation of the rotation trigger assembly.

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

the utility model provides an overcurrent protection setting device, which is essentially an electromagnetic induction system for an overcurrent relay, wherein a setting value of a system current to be protected is set for a tension providing assembly, the tension providing assembly provides certain tension to enable a rotary trigger assembly to be attached to a limiting plate (namely a magnet yoke is separated from two side plates) under a normal working state, and when the current in the system exceeds the set setting value, the magnet yoke is attached to the two side plates by increasing the magnetic force generated by a magnetic force generating assembly, so that a support piece is driven to rotate, an external warning component is triggered to alarm or an external moving component is driven to move, and the purpose of protecting the system is achieved. Compared with the prior art, the overcurrent protection setting device has the advantages that the action time of current protection is short, the sensitivity is high, and different protection current values can be adjusted and set through the knob.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an over-current protection setting device according to the present invention;

FIG. 2 is a schematic diagram of another overall structure of an over-current protection setting device according to the present invention;

FIG. 3 is a front view of an over-current protection tuning apparatus of the present invention;

fig. 4 is a schematic view of the magnetic force generating assembly of the present invention mounted on the insulating base.

Shown in the figure:

1-insulating seat, 2-iron core, 3-coil, 4-side plate, 5-limiting plate, 6-rotating shaft, 7-supporting piece, 8-magnetic yoke, 9-support, 10-knob, 11-sliding block, 12-screw rod, 13-spring, 14-notch, 15-slotted hole and 16-connecting block.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

As shown in fig. 1-2, the present embodiment relates to an overcurrent protection setting device, which comprises an insulating base 1, a magnetic force generating assembly, a tension providing assembly, a rotary trigger assembly and a magnetic yoke 8, the magnetic force generating assembly is arranged on the insulating seat 1, side plates 4 are respectively fixed on two sides of the insulating seat 1, the rotary trigger assembly is rotatably connected to the upper parts of the inner side surfaces of the two side plates 4, and the top of the two side plates 4 is provided with a limit plate 5, the tension providing component is arranged on the limit plate 5, and the other end of the tension providing component is connected with the rotary triggering component, the magnet yoke 8 is fixedly connected with the other end of the rotary triggering component, the yoke 8 is attached to the side plate 4 under the magnetic force of the magnetic force generating assembly or separated from the side plate 4 under the tensile force of the tensile force providing assembly.

The overcurrent protection setting device according to this embodiment is substantially an electromagnetic induction system of an overcurrent protection relay, and when in use, an external warning component or a movable component (such as a signal switch) is connected to the rotary trigger assembly, and the function of the overcurrent protection setting device is to drive the external warning component or the movable component to rapidly move through the movement of the rotary trigger assembly so as to generate a warning signal or a switching electric signal, thereby achieving the purpose of overcurrent protection. Compared with the existing structure of matching the current transformer with the circuit breaker, the structure has the advantages of quick action time and sensitive response.

Further, the main principle of the overcurrent protection setting device related to the embodiment is that the dynamic balance problem of the pulling force applied to the rotary trigger assembly and the magnetic force is utilized, in a normal state, the magnetic force is smaller than or equal to the pulling force, the rotary trigger assembly is attached to the limiting plate 5 under the action of the pulling force providing assembly, once the current in the system is too large, the magnetic force generating assembly generates the magnetic force larger than the pulling force, the magnet yoke 8 is attached to the side plate 4, and the rotary trigger assembly moves, so that the external warning component or the movable component is driven to move rapidly. The magnetic force generating assembly in this embodiment is composed of an iron core 2 and a coil 3, the pulling force providing assembly is composed of a support 9, a knob 10, a slider 11, a lead screw 12 and a spring 13, and the rotation triggering assembly is composed of a rotating shaft 6 and a support member 7.

As shown in fig. 4, the insulator base 1 is an i-shaped barrel structure, the magnetic force generating assembly includes an iron core 2 and a coil 3, the iron core 2 is disposed in an inner circumferential surface of the i-shaped barrel structure 1, and the coil 3 is wound on an outer circumferential surface of the i-shaped barrel structure 1.

Optionally, two threaded holes are respectively formed at two ends of the iron core 2, and the iron core 2, the insulating base 1 and the side plate 4 are connected through the threaded holes.

Optionally, the coil 3 is a rectangular spiral row coil, hooks are arranged at two ends of the rectangular spiral row coil 3, and the hooks are used for being connected with an external cable or a busbar to form a closed current, so that a magnetic force is generated by the magnetic force generating assembly.

As shown in fig. 1, the rotation triggering assembly includes a rotating shaft 6 and a supporting member 7, two ends of the rotating shaft 6 are respectively rotatably connected to the inner side surfaces of the two side plates 4, and two ends of the supporting member 7 are respectively provided with a connecting block 16 for rotatably connecting with the rotating shaft 6.

Optionally, support piece 7 divide into first installation department, connecting portion and second installation department from top to bottom, the connecting hole that is used for rotating the connection with spring 13 is offered at the both ends of first installation department, offer the slotted hole 15 that is used for connecting the outside warning part that triggers on the connecting portion, yoke 8 is fixed to be set up the medial surface of second installation department, connecting block 16 sets up first installation department with between the connecting portion. So configured, under the pulling force of the spring 13, the support 7 can drive the yoke 8 to rotate on the rotating shaft 6.

Optionally, connecting portion be by the bottom of first installation department to the arc structure that the top of second installation department is swelled gradually, the purpose that sets up like this makes and leaves certain clearance between support piece 7's second installation department and two curb plates 4 to in installation yoke 8 and be convenient for yoke 8 and two curb plates 4 laminating or separation.

As shown in fig. 3, the pulling force providing assembly includes a support 9, a knob 10, a sliding mechanism and a spring 13, the support 9 is horizontally disposed, one end of the support 9 is fixedly mounted on the upper surface of the limiting plate 5, the knob 10 is disposed at the other end of the support 9, the sliding mechanism is movably disposed on the support 9, one end of the sliding mechanism is connected to the knob 10, the other end of the sliding mechanism is fixedly connected to the spring 13, and the stretching end of the spring 13 is connected to the rotation triggering assembly.

Optionally, the sliding mechanism is composed of a sliding block 11 and a screw rod 12, the upper end of the sliding block 11 is slidably connected to the support 9, the lower end of the sliding block 11 is fixedly connected to the spring 13, one end of the screw rod 12 is connected to the knob 10 in a matched manner, and the other end of the screw rod 12 is fixedly connected to the sliding block 11. So set up, when the knob 10 is rotated, drive the lead screw 12 and move about, then the slide mechanism moves about under the sliding connection of slider 11 and support 9 to drive the taut and release of spring 13.

It can be understood that the limiting plate 5 is provided with a notch 14 for facilitating the rotation of the rotation trigger assembly.

The operating principle of the overcurrent protection setting device in this embodiment is as follows:

the pulling force acting on the support 7 is adjusted by rotating the knob 10, and a value (setting value) of the protection current required by the system is set. Under normal operating condition, provide certain pulling force for spring 13 through knob 10 and make support piece 7 laminate in the breach 14 of limiting plate 5 (namely yoke 8 and two curb plates 4 separation), when the electric current in the system exceeded the setting value that sets for, the magnetic force that the electromagnetic induction system that comprises iron core 2 and coil 3 produced will surpass this pulling force, then yoke 8 and two curb plates 4 laminate (it needs to explain here, the device is the clearance between yoke 8 and two curb plates 4 under normal condition is 1mm), and then drive support piece 7 and take place to rotate, thereby trigger the outside warning part that is connected with support piece 7 and report to the police or drive outside moving part motion, reach protection system's purpose.

In summary, the current protection setting device provided in this embodiment can improve the operation time and sensitivity of current protection, and at the same time, can adjust and set different protection current values by rotating the knob 10, and can be widely applied to an automated power distribution system.

The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a device is set in overcurrent protection, its characterized in that, set the device and include insulator seat, magnetic force production subassembly, pulling force provide subassembly, rotatory trigger subassembly and yoke, magnetic force production unit mount is in on the insulator seat, the both sides of insulator seat are fixed with the curb plate respectively, rotatory trigger subassembly rotates to be connected two the medial surface upper portion of curb plate, and two the top of curb plate is equipped with the limiting plate, the pulling force provides the unit mount and is in on the limiting plate, just the pulling force provide the other end of subassembly with rotatory trigger subassembly is connected, yoke fixed connection be in the other end of rotatory trigger subassembly, the yoke is in magnetic force produce the subassembly magnetic force effect down with the curb plate laminating or under the pulling force of pulling force provide the subassembly with the curb plate separation.

2. The overcurrent protection setting device according to claim 1, wherein the insulating base is an i-shaped barrel structure.

3. The overcurrent protection setting apparatus according to claim 2, wherein the magnetic force generating assembly includes an iron core and a coil, the iron core is disposed in an inner circumferential surface of the i-shaped barrel structure, and the coil is wound around an outer circumferential surface of the i-shaped barrel structure.

4. The overcurrent protection setting device according to claim 3, wherein the coil is a rectangular spiral row coil, and hooks are provided at both ends of the rectangular spiral row coil and used for connecting with an external cable or a busbar.

5. The overcurrent protection setting device according to claim 1, wherein the rotary trigger assembly includes a rotating shaft and a support member, two ends of the rotating shaft are respectively rotatably connected to inner side surfaces of the two side plates, and two ends of the support member are respectively provided with a connecting block for rotatably connecting with the rotating shaft.

6. The over-current protection setting device according to claim 5, wherein the supporting member is divided into a first mounting portion, a connecting portion and a second mounting portion from top to bottom, the first mounting portion is connected to the pulling force providing assembly through connecting holes formed at both ends of the first mounting portion, the connecting portion is provided with a slot for connecting an external triggering warning component, the magnetic yoke is fixedly disposed on an inner side surface of the second mounting portion, and the connecting block is disposed between the first mounting portion and the connecting portion.

7. The overcurrent protection setting apparatus according to claim 6, wherein the connecting portion has an arc-shaped structure that gradually bulges from a bottom end of the first mounting portion to a top end of the second mounting portion.

8. The overcurrent protection setting device according to claim 1, wherein the tension providing assembly includes a support, a knob, a sliding mechanism, and a spring, the support is horizontally disposed, one end of the support is fixedly mounted on the upper surface of the limiting plate, the knob is disposed at the other end of the support, the sliding mechanism is movably disposed on the support, one end of the sliding mechanism is connected to the knob, the other end of the sliding mechanism is fixedly connected to the spring, and the tension end of the spring is connected to the rotation triggering assembly.

9. The over-current protection setting device according to claim 8, wherein the sliding mechanism comprises a slider and a lead screw, an upper end of the slider is slidably connected to the support, a lower end of the slider is fixedly connected to the spring, one end of the lead screw is fittingly connected to the knob, and the other end of the lead screw is fixedly connected to the slider.

10. The overcurrent protection setting device according to claim 1, wherein the limiting plate is provided with a notch for facilitating the rotation of the rotary trigger assembly.