On-site alarm device for circuit breaker and circuit breaker equipped with on-site alarm device

Abstract

The field alarm device is mounted on a handle of the circuit breaker, and is characterized in that the field alarm device comprises a module shell, a circuit formed by connecting an alarm element, a position switch and a power supply in series is mounted in the module shell, and only when the handle is in a tripping position state, the position switch is switched on, and the alarm element is switched off. When the circuit is switched on, the alarm element sends out an alarm signal. The circuit breaker comprises a circuit breaker shell and a handle extending upwards from the interior of the circuit breaker shell, the swinging positions of the handle correspond to the switching-on state, the tripping state and the switching-off state of the circuit breaker respectively, and the field alarm device is inserted into the handle. The utility model has the advantages of simple structure, low cost and strong market competitiveness, and can help an operator to quickly position the circuit breaker after entering a power distribution room, thereby improving the working efficiency of the circuit breaker; the on-site alarm device is plug-and-play, and the circuit breaker does not need to be improved, so that the on-site alarm device is high in universality; the alarm element can be a light-emitting element or a sound-producing element, so that the requirements of various occasions can be met.

Description

Technical Field

[0001] The utility model belongs to the technical field of low-voltage electrical appliances, and in particular relates to an on-site alarm device for a circuit breaker and a circuit breaker on which the device is installed. Background Art

[0002] Circuit breakers are very important electrical appliances in power supply and distribution lines. They can cut off the current they carry to disconnect the circuit and protect the circuit and electrical equipment. When a fault current is generated and reaches the preset disconnection value, the circuit breaker trips to disconnect the fault current. At this time, the operator needs to enter the site and put the circuit breaker into use after confirming that there is no fault.

[0003] Usually, a power distribution room includes multiple circuit breakers. After an operator enters the power distribution room, he needs to check one by one to locate the circuit breaker that has tripped due to a fault, which is not conducive to the operator's work efficiency. Utility Model Content

[0004] The primary task of the utility model is to provide an on-site alarm device for a circuit breaker, which triggers an on-site alarm signal through the position of a handle, facilitates an operator to quickly locate the circuit breaker, and has a simple structure and low cost.

[0005] Another task of the utility model is to provide a circuit breaker that can quickly indicate a fault and ensure that the above-mentioned effects of the on-site alarm device are fully realized.

[0006] The primary task of the utility model is accomplished in this way: an on-site alarm device for a circuit breaker, the on-site alarm device is installed on the handle of the circuit breaker, the on-site alarm device includes a module housing, a circuit composed of an alarm element, a position switch and a power supply connected in series is installed in the module housing, and only when the handle is in the tripped position state, the circuit is turned on and the alarm element sends an alarm signal.

[0007] In a specific embodiment of the utility model, the position switch is a pair, corresponding to the closing position and the opening position of the handle respectively. When the handle is swung to the closing position or the opening position, the corresponding position switch is switched to the opening state, cutting off the circuit.

[0008] In another specific embodiment of the utility model, the module housing is provided with an inserting cavity, the inserting cavity is used for inserting the handle, and the inserting cavity is also provided with a clamping structure for clamping with the handle.

[0009] In yet another specific embodiment of the present invention, the power source is a battery.

[0010] In another specific embodiment of the present invention, the module housing comprises an upper housing and a lower housing, and the upper housing and the lower housing are spliced ​​together to form the module housing.

[0011] In another specific embodiment of the present invention, the alarm element and the power supply are installed in the upper housing, and the position switch is installed in the lower housing.

[0012] In a further specific embodiment of the present invention, the alarm element is a light emitting element, and a through hole is provided on the top of the upper shell, and the through hole is used to cooperate with the alarm element.

[0013] In a further specific embodiment of the present invention, the alarm element is a sound-generating element.

[0014] In a further specific embodiment of the utility model, conductive copper sheets for achieving electrical connection are respectively provided on the inner walls of the upper shell and the lower shell. When the upper shell and the lower shell are spliced ​​together, the conductive copper sheets electrically connect the alarm element, the position switch and the power supply.

[0015] Another task of the utility model is accomplished in this way: a circuit breaker includes a circuit breaker housing and a handle extending upward from the circuit breaker housing, wherein the swing positions of the handle correspond to the closing, tripping and opening states of the circuit breaker, respectively, and the on-site alarm device is inserted into the handle.

[0016] Due to the adoption of the above structure, the utility model has the following beneficial effects: first, the on-site alarm device only includes an alarm element, a pair of position switches and a power supply, has a simple structure, low cost, strong market competitiveness, and can help the operator quickly locate the circuit breaker after entering the power distribution room, thereby improving the work efficiency; second, the on-site alarm device is plug-and-play, does not require improvement of the circuit breaker, and has high versatility; third, the alarm element can select a light-emitting element or a sound-emitting element, which can meet the needs of various occasions; fourth, the circuit breaker can ensure that the above-mentioned effects of the on-site alarm device are fully reflected. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the on-site alarm device when the circuit breaker involved in the utility model is in the tripping position state;

[0018] Figure 2 A side schematic diagram of the interior of the on-site alarm device involved in the utility model;

[0019] Figure 3 Another side schematic diagram of the interior of the on-site alarm device involved in the utility model;

[0020] Figure 4 It is a schematic diagram of the internal electrical connection of the on-site alarm device involved in the utility model when it is in the tripping position state;

[0021] Figure 5 It is a schematic diagram of the on-site alarm device when the circuit breaker involved in the utility model is in the closed position state;

[0022] Figure 6 It is a schematic diagram of the internal electrical connection of the on-site alarm device involved in the utility model when it is in the closed position;

[0023] Figure 7 It is a schematic diagram of the on-site alarm device when the circuit breaker involved in the utility model is in the open position state;

[0024] Figure 8 The utility model is a schematic diagram of the internal electrical connection of the on-site alarm device when it is in the open position state. DETAILED DESCRIPTION

[0025] The specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings, but the description of the embodiments is not a limitation of the technical solution. Any changes in form rather than substance based on the concept of the present invention should be regarded as the protection scope of the present invention.

[0026] In the following description, all concepts related to directionality (or orientation) such as up, down, left, right, front and back are referring to the position state of the figure being described, and are intended to facilitate public understanding. Therefore, they should not be understood as special limitations on the technical solutions provided by the present utility model.

[0027] like Figure 1 , is a schematic diagram of a circuit breaker. The circuit breaker includes a circuit breaker housing 1, a handle 11 extending upward from the circuit breaker housing 1, and a cofferdam 12 arranged on the outer edge of the corresponding handle 11. A contact system, an operating mechanism, a tripper and an arc extinguishing chamber are arranged inside the circuit breaker housing 1. When the circuit breaker is closed or opened, the operator drives the operating mechanism to operate by operating the handle 11, and the operating mechanism drives the contact system to close or open. When opening, the arc generated on the contact system enters the arc extinguishing chamber and is extinguished in the arc extinguishing chamber. In the closed state, the operating handle 11 swings to the right, and after the closing is in place, the handle 11 is in the right swing state position; in the open state, the operating handle 11 swings to the left, and after the opening is in place, the handle 11 is in the left swing state position. When a fault current is generated in the circuit breaker, the tripper operates, the tripper triggers the operating mechanism to disintegrate, and the contact system opens, and the handle 11 is in the tripping position state. The tripping position of the handle 11 is between the closing position and the opening position of the handle 11 .

[0028] like Figures 1 to 4 The circuit breaker further comprises an on-site alarm device 100, which is inserted into the handle 11. When the handle 11 is in the tripping position, the on-site alarm device 100 generates an alarm signal, which may be light or sound. Since the on-site alarm device 100 is a plug-and-play type, there is no need to modify the circuit breaker, and the practicability is high.

[0029] The on-site alarm device 100 includes a module housing, in which an alarm element 102, a position switch 103 and a power supply 104 are installed. The alarm element 102, the position switch 103 and the power supply 104 are connected to a circuit. When the handle 11 is in the closing position or the opening position, the position switch 103 disconnects the circuit, the alarm element 102 is not powered, and it cannot send out an alarm signal; when the handle 11 is in the tripping position, the position switch 103 conducts the circuit, the alarm element 102 is powered by the power supply 104, and it sends out an alarm signal, which helps the operator to quickly locate the circuit breaker after entering the power distribution room, thereby improving the operator's work efficiency.

[0030] The position switches 103 are a pair, corresponding to the closing position and the opening position of the handle 11, that is, when the handle 11 is in the closing position, a position switch 103 corresponding to the position cuts off the circuit; when the handle 11 is in the opening position, a position switch 103 corresponding to the position cuts off the circuit, and when the handle 11 is in the tripping position, both position switches 103 do not switch the circuit, the circuit is in the conducting state, and the power supply 104 supplies power to the alarm element 102. In other words, the position switch 103 has a normally closed contact inside, and when the condition is met, the contact is disconnected, and when the condition is not met, the contact is in the closed state.

[0031] Preferably, the alarm element 102 is a light-emitting element, which generates light when in operation, for example, the alarm element 102 is a lamp.

[0032] Preferably, the alarm element 102 is a sound-generating element, which generates sound when in operation, for example, the alarm element 102 is a speaker. The power source 104 is a battery, for example, a button battery.

[0033] The module shell of the on-site alarm device 100 has a plug-in cavity 101, and the plug-in cavity 101 is used for inserting the handle 11, that is, the on-site alarm device 100 is installed by inserting the handle 100 into the plug-in cavity 101. In order to improve the installation reliability of the handle 11 and the plug-in cavity 101, a snap-on structure is also provided on the plug-in cavity 101.

[0034] The module housing includes an upper housing 200 and a lower housing 300. The upper housing 200 and the lower housing 300 are spliced ​​to form a module housing. The alarm element 102 and the power supply 104 are installed in the upper housing 200, and a pair of position switches 103 are installed in the lower housing 300. Usually, the alarm element 102, the position switch 103 and the power supply 104 are electrically connected through wires. In order to facilitate installation, a conductive sheet can be used to replace the wire. For example, a conductive sheet for achieving electrical connection is provided on the inner wall of the upper housing 200 and the lower housing 300. When the upper housing 200 and the lower housing 300 are spliced, the conductive sheets located in the upper housing 200 and the lower housing 300 are plugged into each other, and then the conductive sheet can achieve electrical connection between the alarm element 102, the position switch 103 and the power supply 104. This arrangement is more convenient for installation and maintenance.

[0035] Continue to see Figure 2 , Figure 3 The top of the upper housing 200 has a through hole, which is used to cooperate with the alarm element 102. When the alarm element 102 is a light-emitting element, the through hole facilitates the transmission of the light beam to the outside, making it convenient for the operator to see the light beam, thereby achieving the alarm effect. Of course, if the alarm element 102 is a sound-emitting element, the through hole can also facilitate the transmission of the sound to the outside.

[0036] See Figure 5 , 6 At this time, the circuit breaker is in the closed state, and the handle 11 is in the left swing position. At this time, the position switch 103 on the left is in contact with the circuit breaker housing 1 and triggers the position switch 103 on the left to switch to the disconnected state. At this time, since the circuit is not conductive, the alarm element 102 does not send out an alarm signal.

[0037] See Figure 7 , 8 At this time, the circuit breaker is in the open state, and the handle 11 is in the right swing position. At this time, the position switch 103 on the right side contacts the circuit breaker housing 1 and triggers the position switch 103 on the right side to switch to the open state. At this time, since the circuit is not conductive, the alarm element 102 does not send out an alarm signal.

[0038] More specifically, the position switch 103 is push-fitted with the cofferdam 12 .

Claims

1. An on-site alarm device for a circuit breaker, the on-site alarm device (100) being mounted on a handle (11) of the circuit breaker, characterized in that: The on-site alarm device (100) comprises a module housing, in which a circuit consisting of an alarm element (102), a position switch (103) and a power source (104) connected in series is installed. Only when the handle (11) is in a tripped position state, the circuit is turned on and the alarm element (102) sends out an alarm signal.

2. The on-site alarm device for a circuit breaker according to claim 1, characterized in that: The position switches (103) are a pair, corresponding to the closing position and the opening position of the handle (11), respectively. When the handle (11) is swung to the closing position or the opening position, a corresponding position switch (103) is switched to an opening state, thereby cutting off the circuit.

3. The on-site alarm device for a circuit breaker according to claim 1, characterized in that: The module housing is provided with an inserting cavity (101), and the inserting cavity (101) is used for inserting the handle (11). The inserting cavity (101) is also provided with a clamping structure for clamping with the handle (11).

4. The on-site alarm device for a circuit breaker according to claim 1, characterized in that: The power source (104) is a battery.

5. The on-site alarm device for a circuit breaker according to claim 1, characterized in that: The module housing comprises an upper housing (200) and a lower housing (300), and the upper housing (200) and the lower housing (300) are spliced ​​together to form a module housing.

6. The on-site alarm device for a circuit breaker according to claim 5, characterized in that: The alarm element (102) and the power source (104) are installed in the upper housing (200), while the position switch (103) is installed in the lower housing (300).

7. The on-site alarm device for a circuit breaker according to claim 6, characterized in that: The alarm element (102) is a light-emitting element, and a through hole is provided on the top of the upper shell (200), and the through hole is used to cooperate with the alarm element (102).

8. The on-site alarm device for a circuit breaker according to claim 6, characterized in that: The alarm element (102) is a sound-generating element.

9. The on-site alarm device for a circuit breaker according to claim 6, characterized in that: Conductive copper sheets for achieving electrical connection are respectively provided on the inner walls of the upper shell (200) and the lower shell (300). When the upper shell (200) and the lower shell (300) are spliced ​​together, the conductive copper sheets electrically connect the alarm element (102), the position switch (103) and the power source (104).

10. A circuit breaker, comprising a circuit breaker housing (1) and a handle (11) extending upward from the circuit breaker housing (1), wherein the swing positions of the handle (11) correspond to the closing, tripping and opening states of the circuit breaker, respectively, and characterized in that: The handle (11) is inserted with the on-site alarm device (100) described in any one of claims 1 to 9.

Images