Thermal protection circuit breaker

Abstract

The utility model relates to the technical field of circuit breakers, and discloses a thermal protection circuit breaker which comprises a circuit breaker body, a counting mechanism is arranged on one side of the circuit breaker body and comprises a supporting plate, a first pawl, a second pawl, a ratchet wheel and a plurality of counting stickers, and the front face of the ratchet wheel is fixedly connected with the counting stickers. According to the utility model, through the arrangement of the counting mechanism, when a circuit is short-circuited, the circuit breaker body cuts off a power supply, then the operating rod falls down, the operating rod drives the second pawl to push the ratchet wheel to rotate in the falling process, and then the first pawl abuts against one side wall of the ratchet wheel, so that the ratchet wheel is driven to rotate; the rotation of the ratchet wheel drives the counting sticker to rotate, and the arranged indicating rod can indicate the next counting sticker, thereby achieving the purpose of counting, facilitating the understanding of the operation frequency of the circuit breaker body in daily work, and facilitating the evaluation of the overload protection function of the circuit breaker body.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a thermal protection circuit breaker. Background Art

[0002] A thermal protection circuit breaker is a thermal protection device used to protect electrical equipment. Its main function is to cut off the power supply in time when the equipment is overloaded or short-circuited to prevent the equipment from being damaged or causing safety accidents such as fire. Its working principle is based on the characteristics of current and time. When the current exceeds the set value and lasts for a certain period of time, the thermal protection circuit breaker will automatically cut off the power supply to protect the equipment.

[0003] In the application number "201020608463.3", a "leakage circuit breaker" is disclosed. This application solves the problem of high energy consumption of electrical components in existing circuit breakers. In practice, when the circuit breaker is overloaded, the circuit breaker will cut off the power supply, causing the operating lever to jump. Some circuit breakers are inconvenient to record the number of times the operating lever jumps, and it is impossible to accurately understand the operation frequency and usage status of the circuit breaker in daily work. The installation and disassembly of some circuit breakers are time-consuming, and screws and other parts are usually used to fix the circuit breaker. When the equipment fails and requires emergency maintenance, the circuit breaker cannot be disassembled quickly, which may result in the failure to eliminate the fault in time, thereby affecting the normal operation of the electrical system. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a thermal protection circuit breaker, which solves the problems that the circuit breaker is inconvenient to record the number of times the operating rod jumps and cannot be quickly installed and disassembled.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a thermal protection circuit breaker, including a circuit breaker body, a counting mechanism is provided on one side of the circuit breaker body, the counting mechanism includes a support plate, a first pawl, a second pawl, a ratchet and a counting sticker, a plurality of counting stickers are fixedly connected to the front of the ratchet, an indicator rod is fixedly connected to one side wall of the support plate, a first pawl is rotatably connected to the top of one side wall of the support plate, the first pawl is affixed to one side wall of the ratchet, and the second pawl is affixed to the other side wall of the ratchet.

[0006] Preferably, an operating rod is rotatably connected to the front of the circuit breaker body, a side wall of the second pawl is rotatably connected to a side wall of the operating rod, and a back side of the ratchet is rotatably connected to a side wall of the circuit breaker body.

[0007] Preferably, a thermal protector is provided inside the circuit breaker body, the thermal protector is electrically connected to the circuit breaker body, and an arc extinguishing chamber is provided on the top of the thermal protector.

[0008] Preferably, a mounting mechanism is provided on the back side of the circuit breaker body, the mounting mechanism comprises a fixed support, a fixed plate, a reset spring and an observation slot, and two fixed plates are provided on the front side of the fixed support.

[0009] Preferably, one of the fixing plates is fixedly connected to one side of the front face of the fixing support, and the other fixing plate is slidably connected to the other side of the front face of the fixing support.

[0010] Preferably, a back plate is fixedly connected to the back of the circuit breaker body, a plurality of locking grooves are provided on both sides of the back plate, and a plurality of fixing columns are fixedly connected to the inner sides of the two fixing plates.

[0011] Preferably, an observation groove is provided inside the back plate, and an abutment plate is laterally slidably connected inside the observation groove.

[0012] Preferably, two return springs are fixedly connected between the two fixing plates.

[0013] Beneficial Effects

[0014] The utility model provides a thermal protection circuit breaker. Compared with the prior art, it has the following beneficial effects:

[0015] 1. In the utility model, through the counting mechanism, when a short circuit occurs in the circuit, the circuit breaker body will cut off the power supply, and then the operating rod will fall down. During the falling process of the operating rod, the second pawl will be driven to push the ratchet to rotate, and then the first pawl will be against the side wall of the ratchet, so that the ratchet can only rotate counterclockwise. The rotation of the ratchet drives the counting sticker to rotate, and cooperates with the indicator rod, which can indicate the next counting sticker, so as to achieve the purpose of counting, facilitate understanding of the operating frequency of the circuit breaker body in daily work, and facilitate evaluation of the overload protection function of the circuit breaker body.

[0016] 2. In the utility model, through the provided installation mechanism, the user pushes one of the fixing plates so that one of the fixing plates is away from the other fixing plate, the user places the circuit breaker body on the fixed support, and then moves the circuit breaker body close to the other fixing plate, so that the multiple fixing posts on the other fixing plate are respectively inserted into the locking grooves, and then the user loosens one of the fixing plates so that the multiple fixing posts on one of the fixing plates are inserted into the multiple locking grooves on the back plate, which can lock the circuit breaker body more conveniently. In conjunction with the provided observation groove, when the multiple fixing posts on one of the fixing plates are inserted into the locking grooves, the multiple fixing posts push the push plate, so that the push plate is pushed from one side wall of the observation groove to the other side wall of the observation groove. The user can observe whether the push plate is pushed to the other side wall of the observation groove to determine whether it is installed in place, which can achieve the purpose of rapid installation and disassembly. When the circuit needs to be maintained or troubleshooted, rapid replacement of the circuit breaker body can shorten the power outage time and reduce the impact on users. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the three-dimensional structure of a thermal protection circuit breaker proposed by the utility model;

[0018] Figure 2 This is a front structural sectional view of a thermal protection circuit breaker proposed by the utility model;

[0019] Figure 3 This is a bottom view structural diagram of a thermal protection circuit breaker proposed by the utility model;

[0020] Figure 4 A thermal protection circuit breaker proposed by the utility model Figure 1 Schematic diagram of part of the mechanism at A in the middle.

[0021] Legend:

[0022] 1. Circuit breaker body; 2. Thermal protector; 3. Arc extinguishing chamber; 4. Operating lever; 5. Installation mechanism; 501. Fixed support; 502. Fixed plate; 503. Reset spring; 504. Observation slot; 505. Abutment plate; 506. Fixed column; 507. Back plate; 508. Locking slot; 6. Counting mechanism; 601. Support plate; 602. First pawl; 603. Ratchet; 604. Counting sticker; 605. Indicator rod; 606. Second pawl. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-Figure 4 The utility model provides two technical solutions, which specifically include the following embodiments:

[0025] Embodiment 1:

[0026] A thermal protection circuit breaker includes a circuit breaker body 1, a counting mechanism 6 is provided on one side of the circuit breaker body 1, the counting mechanism 6 includes a support plate 601, a first pawl 602, a second pawl 606, a ratchet 603 and a counting sticker 604, a plurality of counting stickers 604 are fixedly connected to the front of the ratchet 603, numbers are sprayed on the counting stickers 604, and can be used in conjunction with an indicator rod 605. When one end of the indicator rod 605 points to one of the counting stickers 604, the number of times the current circuit breaker body 1 is powered off is displayed, a side wall of the support plate 601 is fixedly connected to the indicator rod 605, and the support plate The top of one side wall of 601 is rotatably connected to a first pawl 602, which fits one side wall of the ratchet 603, and the other side wall of the ratchet 603 is fitted with a second pawl 606. Torsion springs are installed inside the first pawl 602 and the second pawl 606, so that one end of the first pawl 602 and the second pawl 606 can always be against the side wall of the ratchet 603. When the user needs to re-count, the first pawl 602 and the second pawl 606 are opened respectively, and then the ratchet 603 is rotated, and one of the counting stickers 604 is placed on one side of the indicator rod 605 to re-count.

[0027] During operation, when a short circuit occurs in the circuit, the circuit breaker body 1 will cut off the power supply, and then the operating rod 4 will fall. During the falling process of the operating rod 4, the second pawl 606 will be driven to push the ratchet 603 to rotate, and then the first pawl 602 will press against a side wall of the ratchet 603, so that the ratchet 603 can only rotate counterclockwise. The rotation of the ratchet 603 drives the counting sticker 604 to rotate, and cooperates with the indicator rod 605, which can indicate the next counting sticker 604, thereby achieving the purpose of counting, making it convenient to understand the operating frequency of the circuit breaker body 1 in daily work, and to facilitate the evaluation of the overload protection function of the circuit breaker body 1.

[0028] Embodiment 2:

[0029] On the basis of the first embodiment, the front of the circuit breaker body 1 is rotatably connected to the operating rod 4, the side wall of the second pawl 606 is rotatably connected to the side wall of the operating rod 4, the back of the ratchet 603 is rotatably connected to the side wall of the circuit breaker body 1, and a thermal protector 2 is arranged inside the circuit breaker body 1, and the thermal protector 2 is electrically connected to the circuit breaker body 1, and an arc extinguishing chamber 3 is arranged on the top of the thermal protector 2. The thermal protector 2 monitors the temperature of the circuit and can adjust the current in real time during the operation of the equipment to ensure that the equipment operates within a safe range. When the circuit is overloaded, the arc extinguishing chamber 3 in the circuit breaker body 1 extinguishes the arc and randomly causes the operating rod 4 to jump. It should be noted that the thermal protector 2 adjusts the current by referring to the existing technology, and a mounting mechanism 5 is arranged on the back of the circuit breaker body 1. The mounting mechanism 5 includes a fixed support 501, a fixed plate 502, and a reset spring Spring 503 and observation slot 504, two fixing plates 502 are arranged on the front of the fixed support 501, one of the fixing plates 502 is fixedly connected to one side of the front of the fixed support 501, and the other fixing plate 502 is slidably connected to the other side of the front of the fixed support 501, a back plate 507 is fixedly connected to the back of the circuit breaker body 1, a plurality of locking slots 508 are provided on both sides of the back plate 507, a plurality of fixing columns 506 are fixedly connected to the inner sides of the two fixing plates 502, an observation slot 504 is provided inside the back plate 507, a butt plate 505 is lateraly slidably connected inside the observation slot 504, two reset springs 503 are fixedly connected between the two fixing plates 502, and the two reset springs 503 can make one of the fixing plates 502 always close to the other fixing plate 502, and provide clamping force when the circuit breaker body 1 is installed;

[0030] The user pushes one of the fixing plates 502 so that the one of the fixing plates 502 is away from the other fixing plate 502, and the user places the circuit breaker body 1 on the fixing support 501, and then moves the circuit breaker body 1 close to the other fixing plate 502 so that the multiple fixing columns 506 on the other fixing plate 502 are respectively inserted into the locking grooves 508, and then the user loosens one of the fixing plates 502 so that the multiple fixing columns 506 on the one of the fixing plates 502 are inserted into the multiple locking grooves 508 on the back plate 507, so that the circuit breaker can be locked more conveniently. The main body 1 is equipped with an observation slot 504. When the multiple fixing columns 506 on one of the fixing plates 502 are inserted into the locking slot 508, the multiple fixing columns 506 push the abutment plate 505, so that the abutment plate 505 is pushed from one side wall of the observation slot 504 to the other side wall of the observation slot 504. The user can observe whether the abutment plate 505 is pushed to the other side wall of the observation slot 504 to determine whether it is installed in place, which can achieve the purpose of quick installation and disassembly. When the circuit needs to be maintained or troubleshooted, quick replacement of the circuit breaker body 1 can shorten the power outage time and reduce the impact on users.

Claims

1. A thermal protection circuit breaker, comprising a circuit breaker body (1), characterized in that: A counting mechanism (6) is provided on one side of the circuit breaker body (1), and the counting mechanism (6) comprises a support plate (601), a first ratchet (602), a second ratchet (606), a ratchet wheel (603) and a counting sticker (604); a plurality of counting stickers (604) are fixedly connected to the front of the ratchet wheel (603); an indicator rod (605) is fixedly connected to one side wall of the support plate (601); a first ratchet (602) is rotatably connected to the top of one side wall of the support plate (601); the first ratchet (602) is attached to one side wall of the ratchet wheel (603); and a second ratchet (606) is attached to the other side wall of the ratchet wheel (603).

2. A thermal protection circuit breaker according to claim 1, characterized in that: The front side of the circuit breaker body (1) is rotatably connected to an operating rod (4), a side wall of the second ratchet (606) is rotatably connected to a side wall of the operating rod (4), and the back side of the ratchet (603) is rotatably connected to a side wall of the circuit breaker body (1).

3. A thermal protection circuit breaker according to claim 1, characterized in that: A thermal protector (2) is arranged inside the circuit breaker body (1); the thermal protector (2) is electrically connected to the circuit breaker body (1); and an arc extinguishing chamber (3) is arranged on the top of the thermal protector (2).

4. A thermal protection circuit breaker according to claim 1, characterized in that: The back of the circuit breaker body (1) is provided with a mounting mechanism (5), the mounting mechanism (5) comprising a fixed support (501), a fixed plate (502), a reset spring (503) and an observation slot (504), and the front of the fixed support (501) is provided with two fixed plates (502).

5. A thermal protection circuit breaker according to claim 4, characterized in that: One of the fixing plates (502) is fixedly connected to one side of the front face of the fixing support (501), and the other fixing plate (502) is slidably connected to the other side of the front face of the fixing support (501).

6. A thermal protection circuit breaker according to claim 5, characterized in that: A back plate (507) is fixedly connected to the back of the circuit breaker body (1), a plurality of locking grooves (508) are provided on both sides of the back plate (507), and a plurality of fixing columns (506) are fixedly connected to the inner sides of the two fixing plates (502).

7. A thermal protection circuit breaker according to claim 6, characterized in that: An observation slot (504) is provided inside the back plate (507), and a stop plate (505) is laterally slidably connected inside the observation slot (504).

8. A thermal protection circuit breaker according to claim 4, characterized in that: Two return springs (503) are fixedly connected between the two fixing plates (502).

Images