A three-phase four-wire arc fault protection device

Abstract

The utility model provides a three -phase four -wire electric arc fault protection device relates to electrical safety protection equipment technical field, including electric arc fault protection mechanism, electric arc fault protection mechanism includes electric arc fault protector, is distributed with a plurality of fastening agencies on electric arc fault protection mechanism. The utility model discloses the outside of square plug -in rod is equipped with the connecting sleeve convenient to provide effective sleeve setting effect, cooperate the support plate to telescopic rod installation simultaneously, utilize telescopic rod cooperation spring piece to provide the driving effect to the connecting sleeve, make the connecting sleeve further sleeve setting in the outside of fastening bolt, to facilitate when needing to disassemble bolt, through the external pull -out rotating handle, realize square plug -in rod extension, connecting sleeve sleeve setting in the outside of fastening bolt simultaneously, convenient through the rotation rotating handle drive fastening bolt synchronous rotation, need not help the tool, realized the function of quick disassembly, effectively promoted the convenience of operation, guaranteed the efficiency of operation.

Description

Technical Field

[0001] This utility model relates to the field of electrical safety protection equipment technology, and in particular to a three-phase four-wire arc fault protection device. Background Technology

[0002] Three-phase four-wire power supply systems (L1, L2, L3 live wires + N neutral wire) are widely used in industrial plants, commercial buildings and other scenarios. However, problems such as aging lines, poor contact, and equipment overload can easily cause fault arcs, with temperatures reaching over 4000℃, which is a major cause of electrical fires.

[0003] Existing arc protection devices use bolts to tighten the wire connections. However, these bolts require tools such as screwdrivers, which are unusable when such tools are unavailable. This results in inconvenience and reduced operational efficiency. Utility Model Content

[0004] The purpose of this utility model is to solve the problem that in the existing technology, bolts used for tightening connections all require the use of tools such as screwdrivers, and operation is impossible when tools are unavailable, resulting in insufficient convenience and affecting operational efficiency. Therefore, a three-phase four-wire arc fault protection device is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a three-phase four-wire arc fault protection device, comprising an arc fault protection mechanism, wherein the arc fault protection mechanism includes an arc fault protector, and a plurality of fastening mechanisms are distributed on the arc fault protection mechanism, wherein the fastening mechanism includes a fastening bolt, a clamping plate is provided on the outer side of the fastening bolt, a square insert rod is installed through the inner side of the fastening bolt, a rotating handle is fixedly connected to one end of the square insert rod, a connecting sleeve is movably sleeved on the outer side of the square insert rod, and a plurality of telescopic rods are evenly distributed along the circumferential direction on one side of the connecting sleeve, and a spring is sleeved on the outer side of the telescopic rod.

[0006] Preferably, a rubber sleeve is fitted on the outer side of the rotating handle, and a limit pin is fixedly connected to the inner wall of the rubber sleeve.

[0007] Preferably, one end of the telescopic rod is provided with a support plate, and the support plate is fixedly connected to the outer wall of the square insert rod.

[0008] Preferably, the arc fault protector is provided with wiring ports at both the top and bottom, and one end of the fastening bolt passes through the inside of the wiring port.

[0009] Preferably, the arc fault protector has symmetrical and uniformly spaced mounting slots on its front side, and the inner side of the wiring port is connected to the inner side of the mounting slot.

[0010] Preferably, the clamping plate is movably installed inside the wiring port.

[0011] Preferably, one end of the rotating handle has a through-hole, and one end of the limiting pin is connected to the inside of the through-hole.

[0012] Preferably, the inner side of the connecting sleeve is provided with a fitting groove, and one end of the spring is connected to the inner side of the fitting groove.

[0013] Preferably, a switch handle is movably mounted on the front of the arc fault protector.

[0014] Preferably, the arc fault protector has an upper latch and a lower latch on the back, with the lower latch located below the upper latch.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this utility model, a square insert rod is inserted through the inner side of the fastening bolt, and an internal limiting structure is provided to ensure that it will not fall off when the square insert rod drives the rotating handle for extension and retraction adjustment, thereby improving the efficiency of use. A connecting sleeve is provided on the outer side of the square insert rod to provide effective fitting. At the same time, the telescopic rod is installed with the support plate, and the telescopic rod, together with the spring, provides a pushing force to the connecting sleeve, so that the connecting sleeve is further fitted onto the outer side of the fastening bolt. This makes it convenient to remove the bolt by pulling out the rotating handle from the outside, allowing the square insert rod to extend, and the connecting sleeve to fit onto the outer side of the fastening bolt. This allows the fastening bolt to rotate synchronously by rotating the rotating handle, without the need for tools, achieving a quick disassembly function, effectively improving the convenience of operation and ensuring operational efficiency.

[0016] 2. In this utility model, a rubber sleeve is fitted on the outside of the rotating handle, and a limiting pin is fixedly connected to the inside of the rubber sleeve. The limiting pin is inserted and connected to the inside of the rotating handle, which achieves effective insulation and protection, and helps to improve the safety during operation. Attached Figure Description

[0017] Figure 1 This utility model provides a three-dimensional structural schematic diagram of a three-phase four-wire arc fault protection device; Figure 2 This utility model presents another structural schematic diagram of a three-phase four-wire arc fault protection device. Figure 3 This utility model provides a partially exploded structural diagram of a three-phase four-wire arc fault protection device. Figure 4An exploded view of the fastening mechanism of a three-phase four-wire arc fault protection device is provided for this utility model. Figure 5 This utility model Figure 4 A magnified structural diagram at point A in the diagram.

[0018] Legend: 1. Arc fault protection mechanism; 101. Arc fault protector; 102. Wiring port; 103. Mounting slot; 104. Switch handle; 105. Upper buckle; 106. Lower buckle; 2. Fastening mechanism; 201. Fastening bolt; 202. Pressure plate; 203. Square insert rod; 204. Connecting sleeve; 205. Rotating handle; 206. Rubber sleeve; 207. Limit pin; 208. Support plate; 209. Telescopic rod; 210. Spring component. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0021] Example 1: As Figures 1-5 As shown, this utility model provides a technical solution: a three-phase four-wire arc fault protection device, including an arc fault protection mechanism 1, the arc fault protection mechanism 1 including an arc fault protector 101, a plurality of fastening mechanisms 2 distributed on the arc fault protection mechanism 1, the fastening mechanism 2 including fastening bolts 201, a clamping plate 202 provided on the outer side of the fastening bolts 201, a square insert rod 203 throughly installed on the inner side of the fastening bolts 201, a rotating handle 205 fixedly connected to one end of the square insert rod 203, a connecting sleeve 204 movably sleeved on the outer side of the square insert rod 203, and a connecting sleeve 204... Several telescopic rods 209 are evenly distributed along the circumference of the side. A spring 210 is sleeved on the outer side of the telescopic rod 209. A rubber sleeve 206 is sleeved on the outer side of the rotating handle 205. A limit pin 207 is fixedly connected to the inner wall of the rubber sleeve 206. A support plate 208 is provided at one end of the telescopic rod 209. The support plate 208 is fixedly connected to the outer wall of the square insert rod 203. An insertion hole is opened through one end of the rotating handle 205. One end of the limit pin 207 is connected through the inner side of the insertion hole. A fitting slot is opened on the inner side of the connecting sleeve 204. One end of the spring 210 is connected to the inner side of the fitting slot.

[0022] In this embodiment, three live wires and a neutral wire are connected to the top and bottom of the arc fault protector 101 for easy protection. Fastening bolts 201 penetrate the front of the arc fault protector 101 and are distributed across it, facilitating the limiting and fixing of the connected lines. A clamping plate 202 presses against the line connector, providing further limiting. A square insert 203 is inserted through the inside of the fastening bolts 201 and has an internal limiting structure to prevent it from falling off when the handle 205 is adjusted for extension and retraction, thus improving usability. The outer side of the square insert 203... A connecting sleeve 204 is provided to facilitate effective fitting. It works in conjunction with the support plate 208 to install the telescopic rod 209. The telescopic rod 209, in conjunction with the spring 210, provides a pushing force to the connecting sleeve 204, allowing it to be further fitted onto the outside of the fastening bolt 201. This facilitates disassembly of the bolt by pulling out the rotating handle 205, extending the square insert rod 203. Simultaneously, the connecting sleeve 204, fitted onto the outside of the fastening bolt 201, allows the fastening bolt 201 to rotate synchronously by rotating the rotating handle 205, eliminating the need for tools and enabling quick disassembly. This significantly improves operational convenience and efficiency. A rubber sleeve 206 is fitted onto the outside of the rotating handle 205, with a limiting pin 207 fixedly connected to the inside of the rubber sleeve 206. The limiting pin 207, inserted into the inside of the rotating handle 205, provides effective insulation and protection, enhancing safety during operation.

[0023] Example 2: As Figures 1-5 As shown, the arc fault protector 101 has wiring ports 102 at both the top and bottom. One end of the fastening bolt 201 passes through the inside of the wiring port 102. The front of the arc fault protector 101 has symmetrical and evenly spaced mounting slots 103. The inside of the wiring port 102 is connected to the inside of the mounting slot 103. The clamping plate 202 is movably installed inside the wiring port 102. The front of the arc fault protector 101 has a switch handle 104 movably installed. The back of the arc fault protector 101 has an upper buckle 105 and a lower buckle 106 respectively, with the lower buckle 106 located below the upper buckle 105.

[0024] In this embodiment, the wiring ports 102 are distributed at the upper and lower positions of the arc fault protector 101, facilitating the connection of wires and improving the ease of connection. The mounting slots 103, distributed on the front of the arc fault protector 101, provide space for the installation of the fastening bolts 201, and also facilitate the insertion of the rotating handle 205 into the inner edge of the mounting slot 103, aiding in later removal and use. The switch handle 104 can automatically drop in case of a fault, providing protection; after fault repair, it can be pushed back up for continued use. The upper latch 105 and lower latch 106 are located on the back of the arc fault protector 101 for easy locking and connection. The lower latch 106 is movable and uses a spring structure to push it into place on the mounting plate for installation and use.

[0025] The working principle of this embodiment is as follows: In use, the arc fault protector 101 is first connected to three live wires and a neutral wire at the top and bottom respectively for easy protection. Fastening bolts 201 pass through the front of the arc fault protector 101 and are distributed on it, facilitating the limiting and fixing of the connected wires. Wiring ports 102 are distributed at the top and bottom of the arc fault protector 101, providing convenient connection points for the wires. Mounting slots 103 on the front of the arc fault protector 101 provide space for the fastening bolts 201 and also facilitate the insertion of a portion of the rotating handle 205 into the inner edge of the mounting slot 103, aiding in later removal for use. The switch handle 104 automatically lowers during a fault, providing protection; after fault repair, it can be pushed back up for continued use. The upper latch 105 and lower latch 106 are located on the back of the arc fault protector 101 to facilitate snap-fit ​​connection. The lower latch 106 is movable and uses a spring structure to push it into place on the mounting plate for installation. The clamping plate 202 presses against the line connector to provide further limiting effect. The square insert 203 is inserted through the inside of the fastening bolt 201 and has an internal limiting structure to ensure that it will not fall off when the square insert 203 drives the rotating handle 205 for telescopic adjustment, thereby improving the performance. The outer side of the square insert 203 has a connecting sleeve 204 for effective sleeve installation. It also works with the support plate 208 to install the telescopic rod 209. The telescopic rod 209 works with the spring... The spring 210 provides a pushing force to the connecting sleeve 204, causing the connecting sleeve 204 to be further fitted onto the outside of the fastening bolt 201. This facilitates the extension of the square insert 203 by pulling out the rotating handle 205 when the bolt needs to be disassembled. Simultaneously, the connecting sleeve 204, fitted onto the outside of the fastening bolt 201, allows the fastening bolt 201 to rotate synchronously by rotating the rotating handle 205, achieving quick disassembly without the need for tools. This effectively improves operational convenience and ensures operational efficiency. A rubber sleeve 206 is fitted onto the outside of the rotating handle 205, and a limiting pin 207 is fixedly connected to the inside of the rubber sleeve 206. The limiting pin 207 is inserted and connected to the inside of the rotating handle 205, achieving effective insulation protection.

[0026] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A three-phase four-wire arc fault protection device, comprising an arc fault protection mechanism (1), characterized in that: The arc fault protection mechanism (1) includes an arc fault protector (101). Several fastening mechanisms (2) are distributed on the arc fault protection mechanism (1). The fastening mechanism (2) includes a fastening bolt (201). A clamping plate (202) is provided on the outside of the fastening bolt (201). A square insert rod (203) is installed through the inside of the fastening bolt (201). A rotating handle (205) is fixedly connected to one end of the square insert rod (203). A connecting sleeve (204) is movably sleeved on the outside of the square insert rod (203). Several telescopic rods (209) are evenly distributed along the circumference on one side of the connecting sleeve (204). A spring (210) is sleeved on the outside of the telescopic rod (209).

2. The three-phase four-wire arc fault protection device according to claim 1, characterized in that: The outer side of the rotating handle (205) is fitted with a rubber sleeve (206), and the inner wall of the rubber sleeve (206) is fixedly connected with a limit pin (207).

3. The three-phase four-wire arc fault protection device according to claim 1, characterized in that: One end of the telescopic rod (209) is provided with a support plate (208), and the support plate (208) is fixedly connected to the outer wall of the square insert rod (203).

4. The three-phase four-wire arc fault protection device according to claim 1, characterized in that: The arc fault protector (101) is provided with wiring ports (102) at both the top and bottom, and one end of the fastening bolt (201) passes through the inside of the wiring port (102).

5. The three-phase four-wire arc fault protection device according to claim 4, characterized in that: The arc fault protector (101) has symmetrical and uniformly spaced mounting slots (103) on its front side, and the inner side of the wiring port (102) is connected to the inner side of the mounting slot (103).

6. The three-phase four-wire arc fault protection device according to claim 5, characterized in that: The clamping plate (202) is movably installed inside the wiring port (102).

7. The three-phase four-wire arc fault protection device according to claim 2, characterized in that: One end of the rotating handle (205) has a through insertion hole, and one end of the limiting pin (207) is connected to the inside of the insertion hole.

8. The three-phase four-wire arc fault protection device according to claim 1, characterized in that: The inner side of the connecting sleeve (204) is provided with a fitting slot, and one end of the spring (210) is connected to the inner side of the fitting slot.

9. The three-phase four-wire arc fault protection device according to claim 1, characterized in that: The arc fault protector (101) has a switch handle (104) movably mounted on its front side.

10. The three-phase four-wire arc fault protection device according to claim 5, characterized in that: The arc fault protector (101) has an upper buckle (105) and a lower buckle (106) on the back, with the lower buckle (106) located below the upper buckle (105).

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