Medium-voltage emergency opening device

Abstract

A medium-voltage emergency opening device provided by the present invention comprises an opening assembly and a button assembly, the opening assembly is movably installed on one side of the button assembly through a shaft portion, the opening assembly comprises an opening box, a spring and a guide rod, and the button assembly comprises a button box, a fixed support, a knob and a button. A guide rod is arranged in the opening box in the length direction of the opening box in a penetrating mode, a reset spring is arranged between the guide rod and the opening box, the reset guide rod, the rotary knob and the button are fixedly installed on one side of the button box, fixing supports are installed on the upper side and the lower side of the button box, one end of each fixing support is fixed to the explosion door, and an ejector pin is installed on one side of the button. The shaft part is provided with a stress rod, one side of the rotary knob is provided with a stirring sheet, the rotary knob drives the stirring sheet to rotate to abut against the stress rod and drive the opening assembly to rotate to a preset position, at the moment, the ejector pin and the guide rod are located on the same extension line, and the effect that the medium-voltage switch cabinet conducts mechanical opening rapidly and safely in an emergency is achieved.

Description

Technical Field

[0001] This invention relates to a medium-voltage emergency tripping device. Background Technology

[0002] Medium-voltage switchgear plays a crucial role in power systems, with its internal circuit breakers responsible for controlling the on / off state of circuits. Under normal operating conditions, the circuit breakers operate by opening and closing via electrical control signals. However, in certain emergency situations, such as serious internal faults in the switchgear, electric shock hazards to operators, or malfunctions of the electrical tripping system, a rapid and reliable means of disconnecting the main circuit power supply is needed to ensure the safety of personnel and equipment.

[0003] In existing technology, medium-voltage switchgear circuit breaker doors typically lack mechanical emergency tripping devices. In emergencies, especially when the electrical tripping function fails, operators must open the switchgear door and manually perform the mechanical tripping operation. This method poses significant safety hazards, as opening the door may expose operators to live components or fault arcs. Furthermore, opening the door and performing manual operation wastes valuable time and could potentially escalate the fault or worsen personal injury.

[0004] Therefore, there is a lack of existing technologies that can achieve rapid and safe mechanical tripping in emergency situations without opening the switch cabinet door. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a medium-voltage emergency tripping device that enables medium-voltage switchgear to quickly and safely perform mechanical tripping in emergency situations. This objective is achieved as follows:

[0006] This invention proposes a medium-voltage emergency tripping device, including a tripping assembly and a button assembly. The tripping assembly is movably mounted on one side of the button assembly via a shaft. The tripping assembly includes a tripping box, a spring, and a guide rod. The button assembly includes a button box, a fixed bracket, a knob, and a button. A guide rod is provided through the interior of the tripping box along its length. A return spring is provided between the guide rod and the tripping box to reset the guide rod. The knob and button are fixedly mounted on one side of the button box. Fixed brackets are installed on both the upper and lower sides of the button box. One end of the fixed bracket is fixed to an explosion-proof door. A pin is installed on one side of the button. A force-bearing rod is installed on the shaft. A toggle piece is installed on one side of the knob. The knob drives the toggle piece to rotate, so as to abut the force-bearing rod and drive the tripping assembly to rotate to a preset position. At this time, the pin and the guide rod are on the same extension line.

[0007] Furthermore, the button assembly and the trip assembly are bolted to the inside of the explosion-proof door, while the knob and button protrude from the outside of the explosion-proof door.

[0008] Furthermore, the other end of the fixed bracket is rotatably connected to the shaft, so that the tripping assembly can rotate 0-90 degrees relative to the button assembly.

[0009] Furthermore, the button box has an arched structure, the switch box is located on the inner side of the arched structure, and the fixing brackets are respectively fixed on the inner side of the arched structure and secured with bolts.

[0010] Furthermore, protective covers are installed on the outside of both the knobs and buttons.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention integrates the tripping assembly and the button assembly, and cleverly uses the knob to drive the toggle plate to rotate to abut the force rod, thereby driving the tripping assembly to rotate to the preset position, so that the pin is aligned with the guide rod, thereby realizing that in an emergency, mechanical tripping operation can be performed without opening the switch cabinet door, while preventing accidental touch, and greatly improving the safety of operation.

[0012] The device is designed with a knob and a button. The knob is used to pre-position the tripping component, and the button is used to trigger the tripping action. The operation logic is clear and facilitates a quick response in emergency situations. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the tripping component of a medium-voltage emergency tripping device;

[0014] Figure 2 This is a three-dimensional structural diagram of the tripping component of a medium-voltage emergency tripping device in a preset position.

[0015] Figure 3 This is a three-dimensional structural diagram of the protective sleeve of a medium-voltage emergency tripping device;

[0016] Figure 4 This is a three-dimensional structural diagram of a medium-voltage emergency tripping device;

[0017] Figure 5 This is a front structural diagram of the button assembly of a medium-voltage emergency tripping device;

[0018] Figure 6 This is a side view of the button assembly of a medium-voltage emergency tripping device;

[0019] In the diagram: 1. Circuit breaker assembly, 2. Button assembly, 3. Circuit breaker box, 4. Spring, 5. Guide rod, 6. Button box, 7. Fixed bracket, 8. Knob, 9. Button, 10. Explosion-proof door, 11. Force rod, 12. Toggle plate, 13. Shaft, 14. Pin, 15. Protective sleeve. Detailed Implementation

[0020] To enhance understanding of the present invention, the present invention will be further described in detail below with reference to embodiments and accompanying drawings. These embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0021] Example 1

[0022] Please refer to Figure 1-6 This invention provides a medium-voltage emergency tripping device, which enables the circuit breaker to be mechanically tripped quickly and safely in the event of an emergency in a medium-voltage switchgear without opening the explosion-proof door 10 of the switchgear. The device mainly includes a tripping assembly 1 and a button assembly 9 2. Specifically, the tripping assembly 1 is movably mounted on one side of the button assembly 9 2 via a shaft 13. This movable mounting allows the tripping assembly 1 to rotate relative to the button assembly 9 2, thereby achieving alignment with the mechanical tripping mechanism of the circuit breaker.

[0023] The tripping assembly 1 specifically includes a tripping box 3, a spring 4, and a guide rod 5. The guide rod 5 is installed inside the tripping box 3 along its length. The guide rod 5 directly acts on the mechanical tripping mechanism of the circuit breaker. In order to ensure that the guide rod 5 can automatically reset after completing the tripping action, a reset spring 4 is installed between the guide rod 5 and the tripping box 3. When the external force is released, the reset spring 4 pushes the guide rod 5 back to the initial position, preparing for the next emergency tripping.

[0024] The button 9 assembly 2 includes a button box 6, a fixing bracket 7, a knob 8, and a button 9. The button box 6 is used to fix and support the button 9 assembly 2. The knob 8 and the button 9 are fixedly installed on one side of the button box 6, the side facing the operator. Fixing brackets 7 are installed on both the upper and lower sides of the button box 6. One end of these fixing brackets 7 is fixedly connected to the explosion-proof door 10 of the switch cabinet, thereby firmly installing the entire device on the explosion-proof door 10.

[0025] Button 9 assembly 2 and trip assembly 1 are bolted to the inside of explosion-proof door 10, while knob 8 and button 9 protrude from the outside of explosion-proof door 10, allowing operators to operate knob 8 and button 9 directly from the outside when explosion-proof door 10 is closed, thus avoiding the safety risks that may arise from opening explosion-proof door 10. A pin 14 is mounted on one side of button 9, which directly contacts and pushes guide rod 5. When button 9 is pressed, pin 14 moves forward. A bearing is mounted on shaft 13. The force lever 11 is a component on the tripping assembly 1 used to receive the force from the knob 8. A toggle piece 12 is mounted on one side of the knob 8. When the operator rotates the knob 8, the knob 8 drives the toggle piece 12 to rotate. During rotation, the toggle piece 12 abuts against the force lever 11, causing the tripping assembly 1 to rotate around the shaft 13. Through the knob 8 driving the toggle piece 12 to rotate and abut against the force lever 11, the tripping assembly 1 is rotated to a preset position. In this preset position, the pin 14 and the guide rod 5 are in the same position. On the extended line, when button 9 is pressed, the ejector pin 14 will accurately push the guide rod 5, thereby triggering the mechanical tripping action of the circuit breaker. The other end of the fixed bracket 7 is rotatably connected to the shaft 13, so that the tripping assembly 1 can rotate 0-90 degrees relative to the button 9 assembly 2, which greatly facilitates the installation and commissioning of the device. The angle of the tripping assembly 1 can be precisely adjusted according to the position of the mechanical tripping mechanism of different models of circuit breakers to ensure the precise alignment of the ejector pin 14 and the guide rod 5. The button box 6 has an arched structure, and the tripping box 3 is located on the inner side of the arched structure. The fixed bracket 7 is fixed on the inner side of the arched structure and fixed with bolts. The arched structure makes the entire device structure more compact. At the same time, the arched structure can provide a certain degree of protection for the internal tripping box 3 to prevent external impact or accidental touch. In order to further improve the protection level of the device and prevent misoperation, protective sleeves 15 are installed on the outside of the knob 8 and the button 9. The protective sleeves 15 can effectively prevent dust, moisture and other substances from entering the device, and can also prevent accidental touch from causing misoperation to a certain extent.

[0026] The working principle of this invention is as follows:

[0027] When an emergency occurs in the switchgear requiring mechanical tripping, the operator first removes the protective cover 15, rotates the knob 8 on the outside of the explosion-proof door 10, and the knob 8 rotates the actuating plate 12. The actuating plate 12 contacts the force rod 11 on the tripping assembly 1, thereby causing the tripping assembly 1 to rotate around the shaft 13. The tripping assembly 1 rotates to the preset position, aligning the guide rod 5 inside with the pin 14 on the button assembly 2, i.e., the pin 14 and the guide rod 5 are on the same extension line. At this time, the operator presses the button on the outside of the explosion-proof door 10. Button 9 pushes the ejector pin 14 forward, which in turn pushes the guide rod 5. The guide rod 5 overcomes the elastic force of the reset spring 4 and moves inward, directly acting on the mechanical tripping mechanism of the circuit breaker, thereby realizing the emergency tripping of the circuit breaker. After the tripping action is completed, button 9 is released, and the ejector pin 14 is reset under the action of its own reset mechanism. At the same time, the guide rod 5 is reset under the action of the reset spring 4, and the device returns to the standby state. The whole process does not require opening the explosion-proof door 10, which greatly improves the safety and efficiency of the emergency tripping operation.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A medium-voltage emergency tripping device, characterized in that, The device includes a tripping assembly and a button assembly. The tripping assembly is movably mounted on one side of the button assembly via a shaft. The tripping assembly includes a tripping box, a spring, and a guide rod. The button assembly includes a button box, a fixed bracket, a knob, and a button. A guide rod is provided through the interior of the tripping box along its length. A return spring is provided between the guide rod and the tripping box to reset the guide rod. The knob and button are fixedly mounted on one side of the button box. Fixed brackets are installed on both the upper and lower sides of the button box. One end of the fixed bracket is fixed to an explosion-proof door. A pin is installed on one side of the button. A force-bearing rod is installed on the shaft. A toggle piece is installed on one side of the knob. The knob drives the toggle piece to rotate, so as to contact the force-bearing rod and drive the tripping assembly to rotate to a preset position. At this time, the pin and the guide rod are on the same extension line.

2. The medium-voltage emergency tripping device according to claim 1, characterized in that, The button assembly and the trip assembly are bolted to the inside of the explosion-proof door, and the knob and button both protrude from the outside of the explosion-proof door.

3. A medium-voltage emergency tripping device according to claim 2, characterized in that, The other end of the fixed bracket is rotatably connected to the shaft so that the tripping assembly can rotate 0-90 degrees relative to the button assembly.

4. A medium-voltage emergency tripping device according to claim 3, characterized in that, The button box has an arched structure, the switch box is located on the inner side of the arched structure, and the fixing brackets are respectively fixed on the inner side of the arched structure and fixed with bolts.

5. A medium-voltage emergency tripping device according to claim 4, characterized in that, The knobs and buttons are all fitted with protective covers on the outside.

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