Circuit breaker with anti-overheating protection function

Abstract

The invention provides a circuit breaker with an anti-overheating protection function, and relates to the technical field of circuit breakers. And two fixing screw rods are inserted into the shell and are fixed in the distribution box in a threaded manner. Through the arrangement of the second protection assembly, on one hand, when a circuit needs to be connected, a second pressing block is pressed, the second pressing block moves downwards and extrudes a first pressing block, when the first pressing block moves downwards, a clamping groove in a connecting rod is connected with two wire holders in a clamped mode, electrification is completed at the moment, and fingers of a person cannot be scalded under the protection of the second pressing block; on the other hand, when the hand of a person presses a second pressing block, an anti-skid groove can play an anti-skid role, and compared with an existing device, the device has an overheating protection function and is higher in safety; and through the arrangement of the indication assembly, when the connecting rod moves upwards to complete circuit breaking, the first pressing block extrudes the contact switch to complete electrification of the indication lamp, and the indication lamp is turned on at the moment, so that workers are conveniently prompted, and the practicability is high.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and in particular to a circuit breaker with an anti-overheating protection function. Background Art

[0002] A circuit breaker is a switching device that can close, carry and disconnect current under normal circuit conditions and can close, carry and disconnect current under abnormal circuit conditions within a specified time; circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use. The boundary between high and low voltage is relatively vague, and those above 3kV are generally called high-voltage electrical appliances.

[0003] The existing device will cause the circuit breaker to heat up after being overloaded. At this time, personnel are easily burned when resetting the circuit breaker, which poses a great safety hazard. When replacing the existing device, if the fixing screw is stripped or the adjustment part of the fixing screw is damaged, it will be impossible to disassemble it, which will delay maintenance efficiency.

[0004] Therefore, in view of this, research and improvement are conducted on the existing structure and defects, and a circuit breaker with an overheat protection function is provided, in order to achieve a more practical purpose. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a circuit breaker with an anti-overheating protection function to solve the problem that the existing device will cause the circuit breaker to become hot after being overloaded. At this time, personnel are easily burned when resetting the circuit breaker, which poses a great safety hazard; when the existing device is replaced, if the fixing screw is stripped or the adjustment part of the fixing screw is damaged, it will be impossible to disassemble it, which delays the maintenance efficiency.

[0006] The present invention provides a circuit breaker with an overheat protection function, which specifically comprises: a shell; two fixing screws are inserted into the shell, and the two fixing screws are both threadedly fixed in a distribution box; and a first protection component is installed on the shell.

[0007] Furthermore, the first protection component is composed of a terminal block, a connecting tube, a first pressing block, a connecting rod, a force block, a mounting block, a guide rod, an electromagnet and a permanent magnet. The shell is made of plastic. Two terminal blocks are fixed in the shell, and both terminal blocks are connected to the wires. Two connecting tubes are slidably connected to the shell, and both connecting tubes are made of plastic. The upper ends of the two connecting tubes are welded to the first pressing block.

[0008] Furthermore, a connecting rod with a concave rod-shaped structure is fused inside the first pressing block. The connecting rod passes through two connecting tubes. The lower part of the connecting rod is located inside the shell. Two slots are provided on the connecting rod, and the two slots are respectively connected to two L-shaped wiring sockets.

[0009] Furthermore, both ends of the lower side of the connecting rod are polished, and after polishing, both ends of the lower side of the connecting rod are arc-shaped structures; the inner sides of the two wiring blocks are polished, and after polishing, the inner sides of the two wiring blocks are arc-shaped structures.

[0010] Furthermore, a rectangular block-shaped mounting block is welded inside the shell, an electromagnet is fixed on the top surface of the mounting block, and the electromagnet is electrically connected to the connecting rod; four guide rods are welded on the top surface of the mounting block, and the four guide rods are all cylindrical rod-shaped structures, and a permanent magnet slides on the four guide rods together, and the permanent magnet is located directly above the electromagnet, and the permanent magnet has the same magnetic pole as the electromagnet.

[0011] Furthermore, a rectangular block-shaped force-bearing block is welded to the connecting rod. The force-bearing block is made of plastic, and the bottom end surface of the force-bearing block is in contact with the top end surface of the permanent magnet.

[0012] Furthermore, a second protective component is fixed on the top of the shell, and the second protective component is composed of a spring rod, a second pressing block and an anti-slip groove. Two spring rods are fixed to the top surface of the shell, and the upper ends of the two spring rods are fixed to the bottom end surface of the second pressing block. The second pressing block is located directly above the first pressing block, and the second pressing block is made of plastic.

[0013] Furthermore, the top surface of the second pressing block is provided with anti-skid grooves in a linear array, and the anti-skid grooves are semi-cylindrical groove structures. The anti-skid grooves provided in the linear array together constitute the anti-skid structure of the second pressing block.

[0014] Furthermore, an indication component is installed on the shell, and the indication component consists of a contact switch and an indicator light. An indicator light is fixed on the top surface of the shell, and a contact switch is fixed on the bottom surface of the second pressing block. The contact switch is electrically connected to the external power supply, and the contact switch is electrically connected to the indicator light. When the connecting rod is detached from the two terminal blocks, the first pressing block contacts the contact switch.

[0015] Furthermore, two auxiliary grooves are formed at the front and rear ends of the shell at one time, and both auxiliary grooves are rectangular groove structures. Two fixing screws pass through the two auxiliary grooves, and the middle parts of the two fixing screws are exposed.

[0016] Furthermore, each of the fixing screw rods is provided with an adjustment hole, and both of the two adjustment holes are circular hole structures, and the two adjustment holes are located at the two auxiliary grooves.

[0017] Compared with the prior art, the present invention has the following beneficial effects: In the present application, through the setting of the second protection component, on the one hand, when the circuit needs to be connected, the second pressing block is pressed, and the second pressing block moves downward and squeezes the first pressing block. When the first pressing block moves downward, the slot on the connecting rod is engaged with the two terminal sockets, and the power is turned on. Under the protection of the second pressing block, the fingers of the person will not be burned; on the other hand, when the person presses his hand on the second pressing block, the anti-slip groove can play an anti-slip role. Compared with the existing device, the present device has an overheating protection function and is safer.

[0018] In the present application, by providing the auxiliary groove and the adjustment hole, on the one hand, when the fixing screw becomes stripped and cannot be disassembled, the staff can use a cutting tool to cut off the fixing screw from the auxiliary groove without damaging the shell during cutting, thereby reducing the maintenance cost; on the other hand, when the adjustment part at the top of the fixing screw is damaged, a round rod can be inserted into the adjustment hole and rotated, at which time the fixing screw can be removed. Compared with the existing device, the present device is more convenient to disassemble.

[0019] In the present application, through the setting of the indicating component, when the connecting rod moves upward to complete the circuit breaking, the first pressing block squeezes the contact switch to complete the power-on of the indicator light. At this time, the indicator light lights up, which is convenient for reminding the staff and has high practicality.

[0020] In the present application, through the setting of the first protection component, when a short circuit occurs in the circuit, the current will increase exponentially. When the current increases, the magnetic force of the electromagnet increases. At this time, the electromagnet will push the permanent magnet to move upward. When the permanent magnet moves upward, it will push the force block and the connecting rod to move upward. When the connecting rod moves upward, it will detach from the two terminal blocks to complete the circuit breaking. Compared with the existing device, the structure of this device is more perfect.

[0021] In the present application, the connecting tube is provided. Since the connecting tube is made of plastic and the two connecting tubes are both sleeved on the connecting rod, the protection of the two connecting tubes can ensure that the exposed part of the connecting rod is shielded, thus avoiding electric shock caused by people touching the connecting rod, and having high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0023] In the attached picture: Figure 1 It shows an axial structural schematic diagram of a circuit breaker with an anti-overheating protection function according to the present invention; Figure 2 It shows a schematic diagram of the main structure of a circuit breaker with an anti-overheating protection function according to the present invention; Figure 3 It shows a schematic diagram of the axial structure of a circuit breaker with an anti-overheat protection function according to the present invention after partial sectioning; Figure 4 It is shown that according to the present invention Figure 3 Schematic diagram of the main structure; Figure 5 The axial structural schematic diagram of the mounting block, the guide rod, the electromagnet and the permanent magnet according to the present invention is shown; Figure 6 It shows an axial structural schematic diagram of the connecting tube, the first pressing block and the connecting rod according to the present invention; Figure 7 It shows a schematic diagram of the axial structure of the indicating assembly according to the present invention; Figure 8 The schematic diagram of the axial structure of the shell after being cut open according to the present invention is shown.

[0024] Reference numerals list 1. Shell; 101. Fixing screw; 102. Auxiliary groove; 103. Adjustment hole; 2. First protection assembly; 201. Terminal block; 202. Connecting tube; 203. First pressing block; 204. Connecting rod; 205. Force bearing block; 206. Mounting block; 207. Guide rod; 208. Electromagnet; 209. Permanent magnet; 3. Second protection assembly; 301. Spring rod; 302. Second pressing block; 303. Anti-slip groove; 4. Indicator assembly; 401. Contact switch; 402. Indicator light. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Unless otherwise defined, all terms (including technical and scientific terms) used in the embodiments of the present invention have the same meanings as commonly understood by those skilled in the art to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless the embodiments of the present invention clearly define such meanings.

[0027] The words "first", "second" and similar words used in the embodiments of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. The words "one", "one" or "the" and similar words do not indicate a quantity limitation, but indicate the existence of at least one. Similarly, the words "include" or "comprise" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. In the following description, the spatial and directional terms such as "upper", "lower", "front", "back", "top", "bottom", "vertical" and "horizontal" may be used to describe the embodiments of the present invention, but it should be understood that these terms are only for the convenience of describing the embodiments shown in the figures, and do not require the actual device to be constructed or operated in a specific orientation. In the following description, the use of terms such as "connect", "couple", "fix" and "attach" may refer to the direct connection between two elements or structures without other elements or structures, or may refer to the indirect connection between two elements or structures through an intermediate element or structure, unless otherwise clearly stated in this article. Embodiment 1:

[0028] As attached Figure 1 To Attachment Figure 8 As shown: The present invention provides a circuit breaker with an overheat protection function, comprising: a housing 1; two fixing screws 101 are inserted into the housing 1, and the two fixing screws 101 are both threadedly fixed in a distribution box; and a first protection component 2 is installed on the housing 1.

[0029] Among them, the first protection component 2 is composed of a terminal block 201, a connecting tube 202, a first pressing block 203, a connecting rod 204, a force block 205, a mounting block 206, a guide rod 207, an electromagnet 208 and a permanent magnet 209. The shell 1 is made of plastic. Two terminal blocks 201 are fixed in the shell 1, and the two terminal blocks 201 are both connected to the wires; two connecting tubes 202 are slidably connected to the shell 1, and the two connecting tubes 202 are both made of plastic. The upper ends of the two connecting tubes 202 are welded to the first pressing block 203.

[0030] Among them, a connecting rod 204 with a concave rod-shaped structure is fused inside the first pressing block 203, and the connecting rod 204 passes through two connecting tubes 202. The lower part of the connecting rod 204 is located inside the shell 1, and two card slots are provided on the connecting rod 204. The two card slots are respectively connected to two L-shaped terminal blocks 201. Because the connecting tube 202 is made of plastic, and the two connecting tubes 202 are both sleeved on the connecting rod 204, the protection of the two connecting tubes 202 can ensure that the exposed part of the connecting rod 204 is blocked, thereby avoiding people touching the connecting rod 204 and causing electric shock, and the safety is high.

[0031] Among them, both ends of the lower side of the connecting rod 204 are polished, and after polishing, both ends of the lower side of the connecting rod 204 are arc-shaped structures; the inner sides of the two terminal blocks 201 are polished, and after polishing, the inner sides of the two terminal blocks 201 are arc-shaped structures. When pressing the first pressing block 203 to realize the connection between the two terminal blocks 201 and the slots on the connecting rod 204, the two slots and the two terminal blocks 201 are connected more smoothly under the guidance of the arc-shaped part.

[0032] Among them, a rectangular block-shaped mounting block 206 is welded inside the shell 1, and an electromagnet 208 is fixed on the top surface of the mounting block 206, and the electromagnet 208 is electrically connected to the connecting rod 204; four guide rods 207 are welded on the top surface of the mounting block 206, and the four guide rods 207 are all cylindrical rod-shaped structures. A permanent magnet 209 slides together on the four guide rods 207, and the permanent magnet 209 is located directly above the electromagnet 208, and the permanent magnet 209 has the same magnetic pole as the electromagnet 208.

[0033] Among them, a rectangular block-shaped force block 205 is welded on the connecting rod 204. The force block 205 is made of plastic. The bottom end surface of the force block 205 is in contact with the top surface of the permanent magnet 209. During use, when a short circuit occurs in the circuit, the current will increase exponentially. When the current increases, the magnetic force of the electromagnet 208 increases. At this time, the electromagnet 208 will push the permanent magnet 209 to move upward. When the permanent magnet 209 moves upward, it will push the force block 205 and the connecting rod 204 to move upward. When the connecting rod 204 moves upward, it will detach from the two terminal blocks 201 to complete the circuit break.

[0034] Among them, a second protection component 3 is fixed on the top of the shell 1, and the second protection component 3 is composed of a spring rod 301, a second pressing block 302 and an anti-slip groove 303. Two spring rods 301 are fixed to the top surface of the shell 1, and the upper ends of the two spring rods 301 are fixed to the bottom end surface of the second pressing block 302. The second pressing block 302 is located directly above the first pressing block 203. The second pressing block 302 is made of plastic. When the circuit needs to be connected, press the second pressing block 302. At this time, the second pressing block 302 moves downward and squeezes the first pressing block 203. When the first pressing block 203 moves downward, the slot on the connecting rod 204 is connected with the two terminal blocks 201. At this time, the power is turned on, and under the protection of the second pressing block 302, people's fingers will not be scalded.

[0035] Among them, the top surface of the second pressing block 302 is provided with anti-skid grooves 303 in a linear array, and the anti-skid grooves 303 are semi-cylindrical groove structures. The anti-skid grooves 303 opened in a linear array together constitute the anti-skid structure of the second pressing block 302. During use, when a person presses his hand on the second pressing block 302, the anti-skid grooves 303 can play an anti-skid role.

[0036] Among them, an indication component 4 is installed on the shell 1, and the indication component 4 consists of a contact switch 401 and an indicator light 402. An indicator light 402 is fixed on the top surface of the shell 1, and a contact switch 401 is fixed on the bottom surface of the second pressing block 302. The contact switch 401 is electrically connected to the external power supply, and the contact switch 401 is electrically connected to the indicator light 402. When the connecting rod 204 is separated from the two terminal blocks 201, the first pressing block 203 contacts the contact switch 401. During use, when the connecting rod 204 moves upward to complete the circuit breaking, the first pressing block 203 squeezes the contact switch 401 to complete the power-on of the indicator light 402. At this time, the indicator light 402 lights up, which is convenient for reminding the staff.

[0037] Among them, two auxiliary grooves 102 are formed at the front end face and the rear end face of the shell 1 at one time. The two auxiliary grooves 102 are both rectangular groove structures. The two fixing screws 101 pass through the two auxiliary grooves 102. At this time, the middle parts of the two fixing screws 101 are exposed. When the fixing screws 101 are stripped and cannot be disassembled, the staff can use a cutting tool to cut off the fixing screws 101 from the auxiliary grooves 102. The shell 1 will not be damaged during cutting, thereby reducing maintenance costs. Embodiment 2:

[0038] On the basis of the first embodiment, it also includes: each fixing screw 101 is provided with an adjustment hole 103, the two adjustment holes 103 are both circular hole structures, the two adjustment holes 103 are located at two auxiliary grooves 102, when the adjustment part at the top of the fixing screw 101 is damaged, a round rod can be inserted into the adjustment hole 103 and rotated, and the fixing screw 101 can be removed at this time.

[0039] The specific usage and function of this embodiment are as follows: During use, when a short circuit occurs in the circuit, the current will increase exponentially. When the current increases, the magnetic force of the electromagnet 208 will increase. At this time, the electromagnet 208 will push the permanent magnet 209 to move upward. When the permanent magnet 209 moves upward, it will push the force block 205 and the connecting rod 204 to move upward. When the connecting rod 204 moves upward, it will detach from the two terminal blocks 201 to complete the circuit break. At the same time, when the connecting rod 204 moves upward to complete the circuit break, the first pressing block 203 squeezes the contact switch 401 to complete the power-on of the indicator light 402. At this time, the indicator light 402 lights up, which is convenient for reminding the staff. When the circuit needs to be connected, press the second pressing block 302 At this time, the second pressing block 302 moves downward and squeezes the first pressing block 203. When the first pressing block 203 moves downward, the card slot on the connecting rod 204 is connected with the two terminal blocks 201. At this time, the power is turned on, and under the protection of the second pressing block 302, the fingers of the personnel will not be burned. During the disassembly and assembly process, when the fixing screw 101 is stripped and cannot be disassembled, the staff can use a cutting tool to cut off the fixing screw 101 from the auxiliary groove 102, and the housing 1 will not be damaged during cutting, thereby reducing the maintenance cost. When the adjustment part at the top of the fixing screw 101 is damaged, a round rod can be inserted into the adjustment hole 103 and rotated, and the fixing screw 101 can be removed at this time.

[0040] The above are only specific implementations of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and the protection scope of the present disclosure shall be based on the protection scope of the claims.

Claims

1. A circuit breaker with an overheat protection function, characterized in that: include: A shell (1); two fixing screws (101) are plugged into the shell (1), and the two fixing screws (101) are both threadedly fixed in the distribution box; a first protection component (2) is installed on the shell (1); the first protection component (2) is composed of a wiring seat (201), a connecting pipe (202), a first pressing block (203), a connecting rod (204), a force block (205), a mounting block (206), a guide rod (207), an electromagnet (208) and a permanent magnet (209); the shell (1) is made of plastic material, and two wiring seats (201) are fixed in the shell (1), and the two wiring seats (201) are both connected to electric wires; two connecting pipes (202) are slidably connected to the shell (1), and the two connecting pipes (202) are both made of plastic material, and the upper ends of the two connecting pipes (202) are fused to the first pressing block (203).

2. A circuit breaker with overheat protection function as claimed in claim 1, characterized in that: A connecting rod (204) with a concave rod-shaped structure is welded inside the first pressing block (203), the connecting rod (204) passes through the two connecting tubes (202), the lower part of the connecting rod (204) is located inside the housing (1), and two slots are provided on the connecting rod (204), and the two slots are respectively engaged with two L-shaped wiring sockets (201).

3. A circuit breaker with overheat protection function as claimed in claim 2, characterized in that: Both ends of the lower side of the connecting rod (204) are polished, and both ends of the lower side of the connecting rod (204) are arc-shaped structures after polishing; the inner sides of the two wiring seats (201) are polished, and both inner sides of the two wiring seats (201) are arc-shaped structures after polishing.

4. A circuit breaker with overheat protection function as claimed in claim 3, characterized in that: A mounting block (206) of a rectangular block structure is welded inside the housing (1); an electromagnet (208) is fixed on the top surface of the mounting block (206); the electromagnet (208) is electrically connected to the connecting rod (204); four guide rods (207) are welded on the top surface of the mounting block (206); the four guide rods (207) are all cylindrical rod-shaped structures; a permanent magnet (209) slides on the four guide rods (207); the permanent magnet (209) is located directly above the electromagnet (208); and the permanent magnet (209) and the electromagnet (208) have the same magnetic pole.

5. A circuit breaker with overheat protection function as claimed in claim 4, characterized in that: A rectangular block-shaped force-bearing block (205) is welded to the connecting rod (204). The force-bearing block (205) is made of plastic. The bottom end surface of the force-bearing block (205) is in contact with the top end surface of the permanent magnet (209).

6. A circuit breaker with overheat protection function as claimed in claim 5, characterized in that: A second protection component (3) is fixed on the top of the shell (1), and the second protection component (3) is composed of a spring rod (301), a second pressing block (302) and an anti-slip groove (303). Two spring rods (301) are fixed on the top surface of the shell (1), and the upper ends of the two spring rods (301) are fixed to the bottom end surface of the second pressing block (302). The second pressing block (302) is located directly above the first pressing block (203), and the second pressing block (302) is made of plastic.

7. A circuit breaker with overheat protection function as claimed in claim 6, characterized in that: The top surface of the second pressing block (302) is provided with anti-skid grooves (303) in a linear array, the anti-skid grooves (303) are semi-cylindrical groove-shaped structures, and the anti-skid grooves (303) provided in the linear array together constitute the anti-skid structure of the second pressing block (302).

8. A circuit breaker with overheat protection function as claimed in claim 7, characterized in that: An indicating assembly (4) is mounted on the housing (1), the indicating assembly (4) comprising a contact switch (401) and an indicating lamp (402); an indicating lamp (402) is fixed to the top surface of the housing (1); a contact switch (401) is fixed to the bottom surface of the second pressing block (302); the contact switch (401) is electrically connected to an external power supply; the contact switch (401) is electrically connected to the indicating lamp (402); when the connecting rod (204) is detached from the two wiring seats (201), the first pressing block (203) contacts the contact switch (401).

9. A circuit breaker with overheat protection function as claimed in claim 8, characterized in that: The front and rear surfaces of the housing (1) are formed with two auxiliary grooves (102) at one time, and both of the two auxiliary grooves (102) are rectangular groove structures. The two fixing screws (101) pass through the two auxiliary grooves (102), and at this time, the middle parts of the two fixing screws (101) are exposed.

10. A circuit breaker with overheat protection function as claimed in claim 9, characterized in that: Each of the fixing screw rods (101) is provided with an adjustment hole (103), and the two adjustment holes (103) are both circular hole structures. The two adjustment holes (103) are located at the two auxiliary grooves (102).

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