A circuit breaker for electrical construction

Abstract

The present invention discloses a circuit breaker for electrical construction, which includes a protective sleeve. Protective covers are fixedly connected to both sides of the protective sleeve. Connecting pieces are fixedly installed inside the two groups of protective covers. Three connecting contact pieces are fixedly connected to the opposite ends of the two groups of connecting pieces. A cavity is formed inside the protective sleeve. Through the setting of the fusing structure, the position of the support ring can be moved left and right to change the area covered by the conductive liquid on the fuse wire, thereby achieving the effect of adjusting the thickness of the fusing area of the fuse wire, that is, changing the resistance value of the fuse wire, enabling it to adapt to different working conditions, realizing the adjustment of the fusing current of different circuits, with a wider adaptation range. At the same time, through the setting of the rubber closing, when adjusting the fusing area of the fuse wire, it can tightly fit the inner wall of the movable groove and the side wall of the movable block, avoiding the leakage of the conductive liquid and ensuring the sealing performance.

Description

Technical Field

[0001] The present invention belongs to the technical field of circuit devices, and specifically relates to a circuit breaker for electrical construction. Background Technique

[0002] During the construction of electrical engineering, various electrical devices are required, and the safety setting of the circuit has always been the top priority in the construction process. Therefore, to protect the safety of workers and equipment, devices that can quickly cut off the current in the circuit in case of overload, high voltage, etc. are usually installed in power supply devices such as electrical boxes. The common safety protector for cutting off the current is a circuit breaker, also known as a fuse, which means that when the current exceeds the specified value, the fuse melts with the heat generated by itself to disconnect the circuit.

[0003] Existing fuses are divided into two types, namely disposable fuses and resettable fuses. Once the disposable fuse burns out, it is necessary to open the device to replace the fuse wire or replace the whole device, which is very inconvenient; while the resettable fuse, the main form is a bimetallic thermal relay, and its fusing component is composed of bimetallic sheets with different thermal deformation coefficients. When the current is too large and the temperature of the bimetallic sheet is too high, the bimetallic sheet disconnects due to deformation until it cools down and then reconnects; both of these methods cause the metal wire to melt at a high temperature after the current increases for a period of time, and a long response time is required, which is likely to cause irreversible damage to the electrical equipment during this period; secondly, although the existing fusing devices have various specifications, the thickness of the fuse body in each of them is fixed, so each fusing device corresponds to a working condition and is applicable to a specific current circuit, thus unable to meet the working conditions of various electrical equipment in engineering construction. Summary of the Invention

[0004] The purpose of the present invention is to provide a circuit breaker for electrical construction to solve the problems mentioned in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] An open circuit protector for electrical construction includes a protective sleeve. Both sides of the protective sleeve are fixedly connected with protective covers. Inside each of the two protective covers, a connecting piece is fixedly installed. At one end of the two connecting pieces facing each other, three connecting contacts are fixedly connected. A cavity is formed inside the protective sleeve. On both sides of the middle of the cavity, a support frame is fixedly installed. Inside the inner sides of the two support frames, three corresponding mounting frames are fixedly connected. Inside each mounting frame, a slider is movably sleeved. At one end of the two sliders facing each other, a fusing structure is fixedly connected. At the end of the slider away from the fusing structure, one end of a return spring is fixedly connected. The other end of the return spring is fixedly connected with the support frame. In the middle of one end of the slider away from the fusing structure, a first conductive rod whose middle part is movably sleeved with the support frame is fixedly connected. In the middle of one end of the other slider away from the fusing structure, a second conductive rod movably sleeved with the support frame is fixedly connected. At the end of the first conductive rod away from the slider, a hinge sleeve is hinged. In the middle of the hinge sleeve, a conductive rod is movably sleeved. In the middle of the conductive rod, a rotating shaft movably sleeved with the protective sleeve is fixedly connected. One end of the rotating shaft extends out of the protective sleeve, and at the end where the rotating shaft extends out, a pointer is fixedly connected.

[0007] The fusing structure includes a fuse wire fixedly connected to the two sliders on both sides and a corrugated pipe with one end fixedly connected to the slider. At the end of the corrugated pipe away from the slider, a support ring is fixedly connected. Inside the support ring, a rubber closing fixedly connected with the fuse wire is movably sleeved. The inside of the corrugated pipe is filled with conductive liquid.

[0008] The return spring is in a stretched state under working conditions.

[0009] There are two groups of the conductive rods intersecting left and right, and the connecting contacts are elastic metal conductive sheets.

[0010] The middle part of the fuse wire is conical, and the end close to the corrugated pipe is the thin end. The rubber closing is made of elastic heat-resistant rubber and can automatically close under its own elastic force until it reaches the closed state.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] 1. Through the settings of the fusing structure, the return spring, and the slider, the present invention can keep the fuse wire in a straight and taut state all the time. After the local part of the fuse wire gets hot and softens, it is pulled to both sides, making the fuse wire quickly become thinner, thus achieving the effect of increased heat generation and rapid fusing, avoiding the need for a long response time and irreversible damage to electrical equipment during this period.

[0013] 2. By providing the fusing structure, connecting contact piece, conductive rod, and second conductive rod, when a set of fusing wires melts, the reset springs on both sides will move towards both sides under their own resilience, quickly separating the fusing wires and causing them to melt rapidly, thus avoiding damage to electrical equipment. When the slider moves towards both sides, it will also drive the first conductive rod to move synchronously, thereby pushing the conductive rod movably connected to the first conductive rod to deflect, so that the bottom end of the conductive rod at this time contacts and conducts electricity with the connecting contact piece at the bottom of the right connecting piece. At the same time, the upper end of the conductive rod contacts and conducts electricity with a set of second conductive rods in the middle. At this time, the current can complete the circuit conduction through structures such as the middle fusing structure, avoiding manual replacement of fusing wires or circuit breakers, and being able to automatically and quickly conduct the circuit to ensure the normal operation of other equipment.

[0014] 3. By providing the fusing structure, the position of the support ring can be moved left and right to change the area covered by the conductive liquid on the fusing wires, thereby achieving the effect of adjusting the thickness of the fusing area of the fusing wires, that is, changing the resistance value of the fusing wires, enabling them to adapt to different working conditions, realizing the adjustment of the fusing current of different circuits, with a wider adaptation range. At the same time, through the rubber closing setting, when adjusting the fusing area of the fusing wires, it can tightly fit the inner wall of the movable groove and the side wall of the movable block, avoiding the leakage of the conductive liquid and ensuring the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a top view of the structure of the present invention.

[0016] Figure 2 It is an overall schematic diagram of the structure of the present invention.

[0017] Figure 3 For the present invention Figure 2 An enlarged view of part A in the figure.

[0018] Figure 4 For the present invention Figure 2 An enlarged view of part B in the figure.

[0019] Figure 5 It is a front view of the structure of the present invention.

[0020] In the figure: 1 - protective sleeve; 2 - protective cover; 3 - connecting piece; 4 - connecting contact piece; 5 - cavity; 6 - support frame; 7 - mounting frame; 8 - slider; 9 - fusing structure; 91 - fusing wire; 92 - bellows; 93 - support ring; 94 - rubber closing; 95 - conductive liquid; 10 - reset spring; 11 - first conductive rod; 12 - hinge sleeve; 13 - conductive rod; 14 - rotating shaft; 15 - pointer; 16 - second conductive rod. DETAILED DESCRIPTION OF THE INVENTION

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] As Figures 1 to 5 shown, an embodiment of the present invention provides a circuit breaker for electrical construction, including a protective sleeve 1. Both sides of the protective sleeve 1 are fixedly connected with protective covers 2. Inside both groups of protective covers 2, connection pieces 3 are fixedly installed. One end of each of the two groups of connection pieces 3 facing each other is fixedly connected with three connection contacts 4. A cavity 5 is formed inside the protective sleeve 1, and support frames 6 are fixedly installed on both sides in the middle of the cavity 5.

[0023] On the inner sides of both groups of support frames 6, three corresponding mounting frames 7 are fixedly connected. Inside each mounting frame 7, a slider 8 is movably sleeved. One end of each of the two groups of sliders 8 facing each other is fixedly connected with a fusing structure 9. One end of a return spring 10 is fixedly connected to the end of the slider 8 away from the fusing structure 9, and the other end of the return spring 10 is fixedly connected to the support frame 6. In the middle of the end of one side slider 8 away from the fusing structure 9, a first conductive rod 11 whose middle is movably sleeved with the support frame 6 is fixedly connected. In the middle of the end of the other side slider 8 away from the fusing structure 9, a second conductive rod 16 movably sleeved with the support frame 6 is fixedly connected. One end of the first conductive rod 11 away from the slider 8 is hinged with a hinge sleeve 12. A conductive rod 13 is movably sleeved in the middle of the hinge sleeve 12. A rotating shaft 14 movably sleeved with the protective sleeve 1 is fixedly connected to the middle of the conductive rod 13. One end of the rotating shaft 14 extends out of the protective sleeve 1, and a pointer 15 is fixedly connected to the end where the rotating shaft 14 extends out. Through the setting of the pointer, people can observe the deflection situation of the conductive rod 13 from the outside of the protective sleeve, and thus analyze which group of fusing structures is connected to the circuit at this time, so as to analyze whether there is an overload of current or other situations during the construction process, and at the same time, the specific working state of the circuit breaker can be analyzed.

[0024] As Figure 3 shown, the fusing structure 9 includes a fuse wire 91 fixedly connected to the two side sliders 8 and a bellows 92 whose one end is fixedly connected to the slider 8. One end of the bellows 92 away from the slider 8 is fixedly connected with a support ring 93. Inside the support ring 93, a rubber closing 94 movably sleeved with the fuse wire 91 is fixedly connected. The inside of the bellows 92 is filled with conductive liquid.

[0025] The reset spring 10 is in a stretched state during operation. By setting the reset spring 10, the fuse wire 91 can always be in a straight and taut state. Thus, after the fuse wire 91 locally heats up and softens, it is pulled to both sides, causing the fuse wire 91 to quickly become thinner, thereby achieving the effect of increased heating and rapid fusing, avoiding the need for a long response time and irreversible damage to the electrical equipment during this period.

[0026] There are two sets of conductive rods 13 that intersect left and right. The connecting contact piece 4 is an elastic metal conductive sheet. The setting of the conductive rods 13 enables the circuit breaker to quickly switch to the next set of fusing structures 9 for circuit conduction through the deflection of the conductive rods 13 after a certain set of fusing structures 9 melts, avoiding the cumbersome manual replacement. And the connecting contact piece 4 being an elastic metal conductive sheet can ensure good contact between the conductive rods 13 and the connecting contact piece 4.

[0027] The middle part of the fuse wire 91 is conical, and the end close to the bellows 92 is the thin end. The rubber closing is made of elastic heat-resistant rubber and can automatically close under its own elastic force until it reaches the closed state. By setting the middle part of the fuse wire 91 to be conical, the position of the support ring 93 can be moved left and right to change the area covered by the conductive liquid 95 on the fuse wire 91, thereby achieving the effect of adjusting the thickness of the fusing area of the fuse wire 91, that is, changing the resistance value of the fuse wire 91, enabling it to adapt to different working conditions, realizing the adjustment of the fusing current of different circuits, with a wider adaptation range. At the same time, through the setting of the rubber closing, when adjusting the fusing area of the fuse wire, it can tightly fit the inner wall of the movable groove and the side wall of the movable block, avoiding leakage of the conductive liquid 95 and ensuring the sealing performance.

[0028] During use, in the initial state, inside the protective sleeve, the current sequentially passes through the bottommost connecting contact piece 4 in the left connecting piece 3, the second conductive rod 16, the fusing structure 9, the first conductive rod 11, the conductive rod 13, and the middle connecting contact piece 4 in the right connecting piece 3 to achieve the current path and conduct electricity. When a situation such as connecting a device with too large a power access occurs, causing the circuit overload to increase, it will cause the fuse wire 91 to heat up and melt quickly and disconnect. At this time, when the bottommost set of fuse wires 91 melts, the two reset springs 10 will move to both sides under their own spring-back action, quickly separating the fuse wire and causing it to quickly fuse, avoiding damage to the electrical equipment.

[0029] When the slider 8 moves to both sides, it will also drive the first conductive rod 11 to move synchronously, thereby pushing the conductive rod 13 movably connected to the first conductive rod 11 to deflect, so that the bottom end of the conductive rod 13 contacts and conducts electricity with the connection contact piece 4 at the bottom of the right connection piece 3. At the same time, the upper end of the conductive rod 13 contacts and conducts electricity with the middle group of second conductive rods 16. At this time, the current can complete the conduction of the circuit through structures such as the middle fuse structure 9, avoiding manual replacement of the fuse or circuit breaker, and can automatically and quickly conduct the circuit to ensure the normal operation of other devices.

Claims

1. A circuit breaker protector for electrical construction, comprising a protective cover (1), both sides of the protective cover (1) are fixedly connected with protective caps (2), and connecting pieces (3) are fixedly installed inside both groups of protective caps (2), characterized in that: Three connection contacts (4) are fixedly connected to the opposite ends of the two groups of the connection pieces (3). A cavity (5) is formed inside the protective sleeve (1). On both sides of the middle of the cavity (5), support frames (6) are fixedly installed. Three corresponding mounting frames (7) are fixedly connected to the inner sides of the two support frames (6). A slider (8) is movably sleeved inside each mounting frame (7). A fusing structure (9) is fixedly connected to the opposite ends of the two sliders (8). One end of a return spring (10) is fixedly connected to the end of the slider (8) away from the fusing structure (9), and the other end of the return spring (10) is fixedly connected to the support frame (6). In the middle of the end of one side of the slider (8) away from the fusing structure (9), a first conductive rod (11) whose middle part is movably sleeved with the support frame (6) is fixedly connected. In the middle of the end of the other side of the slider (8) away from the fusing structure (9), a second conductive rod (16) movably sleeved with the support frame (6) is fixedly connected. One end of the first conductive rod (11) away from the slider (8) is hinged with a hinge sleeve (12). A conductive rod (13) is movably sleeved in the middle of the hinge sleeve (12). A rotating shaft (14) movably sleeved with the protective sleeve (1) is fixedly connected to the middle of the conductive rod (13). One end of the rotating shaft (14) extends out of the protective sleeve (1), and a pointer (15) is fixedly connected to the extended end of the rotating shaft (14). The fusing structure (9) includes a fuse wire (91) fixedly connected to the two side sliders (8) and a bellows (92) with one end fixedly connected to the slider (8). One end of the bellows (92) away from the slider (8) is fixedly connected to a support ring (93). A rubber closing (94) movably sleeved with the fuse wire (91) is fixedly connected to the inner side of the support ring (93). The inside of the bellows (92) is filled with conductive liquid. The middle part of the fuse wire (91) is conical, and the end close to the bellows (92) is the thin end. The rubber closing is made of elastic heat-resistant rubber and can automatically close under its own elastic force until it reaches the closed state.

2. An open circuit protector for electrical construction according to claim 1, characterized in that: The return spring (10) is in a stretched state in the working state.

3. An open circuit protector for electrical construction according to claim 1, characterized in that: Two groups of the conductive rods (13) are arranged in a left-right staggered manner. The connection contacts (4) are elastic metal conductive sheets.

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