Nuclear power voltage transformer handcart equipped with fuse alarm device
By designing structures such as insulated contact arms and signal indicator micro switches on the voltage transformer car for nuclear power, the problems of poor insulation performance and insufficient shock resistance caused by exposed fuses are solved, and rapid fault determination and timely alarm are achieved, which improves the safety and reliability of the equipment.
Patent Information
- Application Number
- CN202422079633.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-27
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-08-27
AI Technical Summary
The fuse installation method of existing voltage transformer handcars for nuclear power is exposed, resulting in poor insulation performance, difficulty in quickly and accurately determining the number of faults, and cannot meet the earthquake resistance requirements, and lacks rapid alarm function.
A voltage transformer car for nuclear power with fuse alarm device is designed, including insulated contact arm, signal indicator micro switch, transmission rod and return spring, etc., to realize the internal installation and rapid alarm of the fuse, and to promptly transmit fault information through signal indicator micro switch.
The internal installation of the fuse is realized, the insulation performance and shock resistance are improved, the number of faults can be quickly and accurately judged, and timely alarms are made through signal lights and alarm sounds to ensure the safety of equipment and the convenience of maintenance.
Smart Images
Figure CN223181633U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of voltage transformer hand trucks, and particularly relates to a voltage transformer hand truck for nuclear power plants configured with a fuse alarm device. Background Art
[0002] In the power system, the fuse is an important protection device. When a fault in the voltage transformer hand truck or fuse hand truck in the circuit causes an excessive current, the fuse wire will melt to cut off the circuit and cut off the fault current, thereby protecting electrical equipment and the circuit from damage. The existing fuse core installation method is exposed, and the fixing buckle is exposed in the air. When the voltage of the voltage transformer is too high, the air gap between the buckle and the cabinet body cannot meet the insulation requirements, and it is extremely easy to be dangerous. At the same time, when the application environment of the fuse is complex, it is difficult to quickly and accurately determine which circuit in the system has a fault. The existing conventional products cannot meet the seismic requirements when used in nuclear power plants, and at the same time cannot meet the technical requirements for rapid alarm after the fuse melts. At present, few domestic domestic products are applied in the nuclear power field, and all use joint-venture brand products. Summary of the Utility Model
[0003] The technical problem to be solved by the utility model is to provide a voltage transformer hand truck for nuclear power plants configured with a fuse alarm device that can quickly alarm after the fuse melts and can quickly and accurately determine which circuit in the system has a fault.
[0004] To solve the above technical problem, the utility model includes a hand truck frame. Three voltage transformers are arranged on the front side of the hand truck frame. Corresponding insulating contact arms are arranged on the front side of the hand truck frame corresponding to the voltage transformers. A fuse is arranged inside the insulating contact arm. A fuse striker is arranged inside the fuse. The front section of the insulating contact arm is a contact head, and the contact head is connected to the voltage transformer through the fuse. Transmission rods are slidably arranged at the rear ends of the insulating contact arms. The transmission rods are coaxially arranged with the corresponding fuse strikers, and a signal indicating micro switch is arranged at the other end of the transmission rod.
[0005] To facilitate the installation of the signal indicating micro switch, signal indicating fixed brackets are arranged on one side of the hand truck frame corresponding to the insulating contact arms, and the signal indicating micro switch is installed on one side of the signal indicating fixed bracket.
[0006] To ensure the installation stability of the equipment, improve safety, and meet the seismic requirements, positioning pins are arranged on the front side of the hand truck.
[0007] To realize the function of confirming the position of the hand truck, a position confirmation micro switch is arranged on the front side of the hand truck.
[0008] To achieve the advantages of simple, fast, stable and reliable maintenance and long service life, a lock device is arranged on the hand truck frame.
[0009] To improve the rationality of the setting of the fuse striker, the fuse striker faces away from the contact.
[0010] To ensure the installation stability of the transfer rod, the transfer rod is installed through a return spring.
[0011] To ensure the installation stability of the transfer rod, the return spring is connected to the insulating contact arm.
[0012] To ensure the installation stability of the transfer rod, the return spring is connected to the trolley frame.
[0013] In summary, the advantages of the present utility model are as follows:
[0014] First, after the fuse is overloaded and blown, the fuse striker pops out and hits the transfer rod. The transfer rod moves leftward and touches the signal indication microswitch through the triggering structure. The signal indication microswitch transmits the signal to the background, and then the signal is transmitted in the form of a signal lamp, an alarm sound, etc. for timely alarm.
[0015] Second, in the design of this device, the signal indication microswitch of the fuse is set on the trolley, which can enable the staff to understand the situation of the equipment more timely, facilitate the off - cabinet maintenance and replacement of the components in a timely manner, ensure the safety of on - site operation and maintenance personnel. The fuse is installed inside, with good insulation performance and strong environmental tolerance.
[0016] Third, the trolley structure of this embodiment is more compact, reasonable, with high reliability and strong practicability, improving the safety and reliability of the circuit. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The following further describes the present utility model in detail with reference to the drawings and specific embodiments:
[0018] Figure 1 is the front - view structural schematic diagram of the present utility model;
[0019] Figure 2 is Figure 1 the left - view structural schematic diagram;
[0020] Figure 3 is Figure 1 the right - view structural schematic diagram. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0021] Referring to the attached Figures 1-3, A voltage transformer trolley for nuclear power with a configured fuse alarm device, which includes a trolley frame 1. Three voltage transformers 7 are arranged on the front side of the trolley frame 1. Corresponding insulating contact arms 4 are arranged on the front side of the trolley frame 1 corresponding to the voltage transformers. A fuse 5 is arranged inside the insulating contact arm 4. The front end of the insulating contact arm is a contact 6, and the contact 6 is connected to the voltage transformer 7 through the fuse 5; Signal indication fixed brackets 2 are arranged on one side of the trolley frame 1 corresponding to the insulating contact arms, and signal indication micro switches 3 are installed on one side of the signal indication fixed brackets 2.
[0022] Reference Figure 1 , The fuse 5 includes a fuse striker 8. The fuse striker is preferably in the direction away from the contact 6. Transfer rods 9 with self-limiting rings are slidably arranged at the rear ends of the insulating contact arms 4. The transfer rods 9 are coaxially arranged with the corresponding fuse strikers 8. The transfer rods 9 are installed through return springs 10. The return springs can be connected to the insulating contact arms or the trolley frame, aiming to stably hold the transfer rods 9 in the installation position. One end of the transfer rod 9 is close to the corresponding fuse striker 8, and the other end of the transfer rod is close to the triggering structure of the signal indication micro switch 3.
[0023] Reference Figure 1 and 3 , A positioning pin 11 is arranged on the front side of the trolley. After the trolley reaches the working position, the positioning pin is inserted into the limiting bending plate hole of the cabinet body, which can improve the installation stability of this device, prevent the trolley from shifting, ensure the installation stability of the equipment, improve safety, and meet the seismic requirements.
[0024] Reference Figure 1 , A position confirmation micro switch 12 is arranged on the front side of the trolley. When the trolley runs to the working position, the bump on the cabinet body contacts the position confirmation micro switch 12, the position point is switched, and the signal is transmitted to the background to realize the trolley position confirmation function.
[0025] Working principle: When the fuse is overloaded and blown, the fuse striker 8 pops out and hits the transfer rod. The transfer rod moves leftward and touches the signal indication micro switch through the triggering structure. The signal indication micro switch transmits the signal to the background, and then it is transmitted in the form of a signal lamp, an alarm sound, etc. for timely alarm.
[0026] Reference Figure 2 , A locking device 13 is arranged on the trolley frame. The locking device uses a structural design with simple structure and large mechanical strength, achieving the advantages of simple maintenance, quickness, stable reliability, and long service life.
[0027] In the design of this device, the signal indicating microswitch 3 of the fuse is arranged on the handcart, which can enable the staff to understand the situation of the equipment more timely, facilitate the off-cabinet maintenance and replacement of components in a timely manner, ensure the safety of on-site operation and maintenance personnel. The fuse is installed inside, with good insulation performance and strong environmental tolerance.
[0028] The handcart structure of this embodiment is more compact, reasonable, highly reliable and practical, improving the safety and reliability of the circuit.
[0029] Certainly, the above description is not a limitation of the present utility model, and the present utility model is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the essence of the present utility model should also fall within the protection scope of the present utility model.
Claims
1. A voltage transformer handcart for nuclear power plants configured with a fuse alarm device, characterized in that: It includes a trolley frame, and three voltage transformers are arranged on the front side of the trolley frame. Corresponding insulating contact arms are arranged on the front side of the trolley frame corresponding to the voltage transformers. A fuse is arranged inside the insulating contact arm, and a fuse striker is built in the fuse. The front end of the insulating contact arm is a contact, and the contact is connected to the voltage transformer through the fuse; transfer rods are slidably arranged at the rear ends of the insulating contact arms, the transfer rods are coaxially arranged with the corresponding fuse strikers, and a signal indicating microswitch is arranged at the other end of the transfer rod; one end of the transfer rod is close to the corresponding fuse striker, and the other end of the transfer rod is close to the triggering structure of the signal indicating microswitch.
2. The voltage transformer handcart for nuclear power with a configured fuse alarm device as claimed in claim 1, wherein : Signal indicating fixed brackets are arranged on one side of the trolley frame corresponding to the insulating contact arms, and a signal indicating microswitch is installed on one side of the signal indicating fixed bracket.
3. The voltage transformer trolley for nuclear power with a configured fuse alarm device according to claim 2, characterized in that : A positioning pin is arranged on the front side of the trolley.
4. The voltage transformer handcart for nuclear power with a configured fuse alarm device as described in claim 2, wherein : A position confirmation microswitch is arranged on the front side of the trolley.
5. The voltage transformer handcart for nuclear power with a configured fuse alarm device as claimed in claim 3, characterized in that : A locking device is arranged on the trolley frame.
6. The voltage transformer handcart for nuclear power with a configured fuse alarm device as described in claim 1, characterized in that : The fuse striker faces away from the contact.
7. A voltage transformer handcart for nuclear power plants configured with a fuse alarm device as claimed in claim 1, characterized in that : The transfer rod is installed through a return spring.
8. A voltage transformer handcart for nuclear power with a configured fuse alarm device as claimed in claim 7, characterized in that : The return spring is connected to the insulating contact arm.
9. A voltage transformer handcart for nuclear power plants configured with a fuse alarm device as claimed in claim 7, characterized in that : The return spring is connected to the trolley frame.