Electromagnetic protection device for circuit equipment

Abstract

The invention relates to the technical field of electromagnetic protection, in particular to an electromagnetic protection device for circuit equipment, which is miniaturized in appearance, simple and reliable in structure, high in environmental adaptability, high in anti-interference capability and comprehensive in protection point subdivision, and integrates line protection, fault indication and electric appliance switch related to integrated aviation special protection devices and push-pull type spring interaction. The working state is clear at a glance, the electrical part and the mechanical part are physically positioned on the front layer and the rear layer in the circuit breaker shell, are separated by a partition plate in the middle and do not interfere with each other, the two chambers are respectively provided with an independent contact structure and are equivalent to series connection in a circuit, short circuit of the circuit can be ensured when any contact is disconnected, and the contact closing action is high in reliability; the circuit breaker has a temperature compensation function, the operating environment temperature can reach-55 DEG C to + 125 DEG C, the circuit breaker has an external force interference resisting function, a button of the circuit breaker is matched with an internal unlocking mechanism through a guide groove, and the functions of internal disconnection and manual disconnection can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic protection, and in particular to an electromagnetic protection device for circuit equipment. Background Art

[0002] The electromagnetic protection device used for circuit equipment is mainly an electromagnetic protector, which is a commonly used electrical protection device, mainly used to protect when the circuit has overload, short circuit and other faults.

[0003] The working principle of the electromagnetic protector is to generate electromagnetic attraction when the circuit current is abnormal, causing the contacts inside the protector to disconnect, thereby cutting off the fault circuit to protect the electrical equipment.

[0004] At present, the circuit protection devices of equipment adopt traditional protection circuits, such as adding fuses at the input end of the circuit board, adding slow-start circuits, and selecting DCDC modules with overvoltage, undervoltage and overcurrent protection functions. These are basically processed at the circuit board level. When a fault occurs, it is troublesome to disassemble and assemble, which is not only time-consuming and labor-intensive, but also increases the difficulty of troubleshooting dramatically.

[0005] Based on this, it is urgent to select a circuit protection device that can meet the stability and safety of the front-stage circuit, which should be installed at the front end of the chassis power input and can be easily plugged in and replaced.

[0006] Electromagnetic circuit breakers can respond quickly to current changes in the protected circuit, have temperature stability, and will not be significantly affected by changes in ambient temperature to affect the circuit breaker's response speed to overload. There is no cooling period from the end of the overload to its reset, and it has overload trip points, overload delay time and surge handling capabilities. For equipment that often needs to withstand huge inrush currents, you can also choose an electromagnetic circuit breaker with a special inrush structure. Summary of the invention

[0007] In view of the above-mentioned shortcomings of the prior art, the present invention provides an electromagnetic protection device for circuit equipment, which can effectively solve the problem of inconvenience in use of the prior art.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides an electromagnetic protection device for circuit equipment, comprising a base and a partition installed in the base, a push-pull spring interactive unit installed at one end of the base, and an electromagnetic and mechanical dual-chamber control unit arranged in the base, wherein the electromagnetic and mechanical dual-chamber control unit comprises an electromagnetic control unit and a mechanical control unit, wherein the mechanical control unit is connected to the push-pull spring interactive unit, and the electromagnetic control unit and the mechanical control unit are arranged on both sides of the partition, and a temperature compensation mechanism is also installed in the base.

[0009] Furthermore, the push-pull spring interactive unit includes a mounting base installed on the top of the base, a spring arranged in the mounting base, and a button installed at one end of the spring away from the mounting base, and a contact head is installed at the end of the spring away from the button.

[0010] Furthermore, the electromagnetic control unit generates magnetic force through electromagnetic induction to control the on and off of the contacts. The current passes through the delay tube and then flows through the electromagnetic coil, generating magnetic force on the electromagnetic coil to adsorb the contacts. When the current increases abnormally and lasts for a period of time, the adsorption capacity of the contacts increases, causing the contacts to disconnect.

[0011] Furthermore, the mechanical control unit includes a double-control structure and a double-contact structure, the double-control structure includes a mechanical switch and an electromagnetic switch, and the double-contact structure includes two groups of contacts located opposite to each other.

[0012] Furthermore, the mechanical control unit realizes the on and off of the control device through the physical position change of the spring and the contact. The button cooperates with the internal unlocking mechanism through the guide groove. When the electromagnetic chamber detects an abnormality and disconnects the circuit breaker due to overload, even if the push-pull spring is stuck by external stress, the mechanical chamber contact will still be disconnected synchronously and the spring will be released. When the external interference disappears, the spring interaction unit can be restored to the correct state.

[0013] Furthermore, the temperature compensation mechanism is a thermal bimetallic strip, specifically comprising a primary and a secondary thermal bimetallic strip, and the primary and the secondary bimetallic strips move synchronously when the temperature changes.

[0014] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects: 1. Small appearance, simple and reliable structure, strong environmental adaptability, strong anti-interference ability, comprehensive protection point segmentation, integrated line protection, fault indication, electrical switch, special aviation protection device, push-pull spring interaction, working status is clear at a glance; 2. The electrical part and the mechanical part are each in a chamber, physically located in the front and back layers of the circuit breaker housing, separated by a partition in the middle, without interfering with each other. The two chambers each have an independent contact structure, which is equivalent to a series connection in the circuit. Any contact disconnection can ensure a short circuit, and the contact closing action has high reliability; 3. It has temperature compensation function, and the ambient temperature can reach -55℃~+125℃. In order to ensure the environmental adaptability of the circuit breaker, a temperature compensation mechanism is designed in the structure using a thermal bimetallic strip. When the temperature changes, it moves synchronously with the main bimetallic strip to achieve temperature compensation and ensure the locking amount of the circuit breaker in high and low temperature environments; 4. It has the function of resisting external interference. The button of the circuit breaker cooperates with the internal unlocking mechanism through the guide groove to realize the internal disconnection and manual disconnection functions. When the circuit breaker is overloaded and disconnected, even if the button is still in a closed state under the action of external force, the internal part can be unlocked normally to ensure the tripping of the internal mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall first-view structure of the present invention; Figure 2 It is a schematic diagram of the overall second viewing angle structure of the present invention; Figure 3 It is a schematic diagram of the overall internal cross-sectional structure of the device of the present invention; Figure 4 It is a schematic diagram of the installation structure of the temperature compensator of the present invention; Figure 5 It is a schematic diagram of the installation structure of the double-control switch of the present invention.

[0016] The numbers in the figure represent: 1. Push-pull spring interactive unit; 2. Electromagnetic control unit; 3. Mechanical control unit; 4. Partition; 5. Temperature compensation mechanism; 6. Double control structure; 7. Double contact structure. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the embodiments.

[0018] Embodiment 1:

[0019] Reference Figure 1-5 , which is the first embodiment of the present invention. The electromagnetic circuit breaker is suitable for various common working voltages, AC: AC115V / 400Hz, 220V / 50Hz, 380V / 50Hz; DC: DC28V, DC48V, DC270V, etc. The electronic circuit breaker proposed in this patent has a miniaturized appearance, a simple and reliable structure, strong environmental adaptability, and comprehensive protection point segmentation. It is a protective device that integrates line protection, fault indication, and electrical switches.

[0020] Figure 1 The figure shows the dimensional diagram of the electromagnetic circuit breaker proposed by the present invention. The present invention includes the following units: a push-pull spring interactive unit 1; an electromagnetic and mechanical dual-chamber control unit; a temperature compensation mechanism 5, which is selected according to the power of the load and is generally connected in series at the power input end. The action characteristics of the circuit breaker can be changed by changing the number of turns of the electromagnetic coil and the parameters of the delay tube, thereby realizing the diversification of current specifications and tripping curves, accurate current setting, and small action repetition error. It is widely used in aviation power distribution systems, primary power distribution, secondary power distribution, aircraft power supplies and other airborne equipment overcurrent and short-circuit protection.

[0021] Embodiment 2:

[0022] This embodiment is different from the first embodiment in that: Figure 2 The figure shows a push-pull type spring interactive unit 1. When the spring is compressed and released, the position and stress of the push-pull type interactive button will change. When it can be seen visually, the on and off of the device can be determined directly by the button state. When it cannot be seen visually, the on and off of the device can be determined by touching the button to sense its stress change.

[0023] The remaining structures are the same as those of Example 1.

[0024] Embodiment 3:

[0025] Reference Figure 1-5 , which is the third embodiment of the present invention, and this embodiment is different from the second embodiment in that: Figure 3 The figure shows an electromagnetic / mechanical dual-chamber control unit, in which the electromagnetic control unit 2 generates magnetic force to control the on and off of the contacts through electromagnetic induction. The current flows through the electromagnetic coil after passing through the delay tube, and generates magnetic force on the electromagnetic coil to adsorb the contacts. When the current increases abnormally and lasts for a period of time, the adsorption capacity of the contacts increases, causing the contacts to disconnect. The number of turns of the electromagnetic coil and the parameters of the delay tube can be changed according to the power selection of the load to change the action characteristics of the circuit breaker, thereby realizing the diversification of current specifications and tripping curves, accurate current setting, and small action repetition error; The mechanical control unit 3 is connected to the push-pull spring interaction unit, and the control device is turned on and off by changing the physical position of the spring and the contact. The button cooperates with the internal unlocking mechanism through the guide groove to realize the manual disconnection function. At the same time, the mechanical room is designed with an anti-external interference function. When the electromagnetic room detects an abnormality and disconnects the circuit breaker due to overload, even if the push-pull spring is stuck by external stress, the contacts in the mechanical room will still be disconnected synchronously and the spring will be released. When the external interference disappears, the spring interaction unit can be restored to the correct state.

[0026] In addition, the device has a temperature compensation function. A temperature compensation mechanism 5 (i.e., a thermal bimetallic strip) is designed in the structure. The contacts and springs in the device all use a bimetallic strip structure with complementary temperature response, so that the main and auxiliary bimetallic strips can be displaced synchronously when the temperature changes, ensuring the locking amount of the circuit breaker in a wide range of temperature environments. The final normal operating environment temperature can reach -55℃~+125℃.

[0027] The remaining structure is the same as that of Example 2.

[0028] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electromagnetic protection device for circuit equipment, comprising a base and a partition (4) installed in the base, characterized in that: Also includes: A push-pull spring interaction unit (1) is installed at one end of a machine base, and an electromagnetic and mechanical dual-chamber control unit is arranged in the machine base, the electromagnetic and mechanical dual-chamber control unit comprises an electromagnetic control unit (2) and a mechanical control unit (3), the mechanical control unit (3) is connected to the push-pull spring interaction unit (1), the electromagnetic control unit (2) and the mechanical control unit (3) are arranged on both sides of a partition (4), and a temperature compensation mechanism (5) is also installed in the machine base.

2. The electromagnetic protection device for circuit equipment according to claim 1, characterized in that: The push-pull spring interaction unit (1) comprises a mounting seat mounted on the top of the machine base, a spring arranged in the mounting seat, and a button mounted on an end of the spring away from the mounting seat, wherein a contact head is mounted on the end of the spring away from the button.

3. The electromagnetic protection device for circuit equipment according to claim 1, characterized in that: The electromagnetic control unit (2) generates magnetic force to control the on and off of the contacts through electromagnetic induction. The current flows through the electromagnetic coil after passing through the delay tube, generating magnetic force on the electromagnetic coil to attract the contacts. When the current increases abnormally and lasts for a period of time, the adsorption capacity of the contacts increases, causing the contacts to be disconnected.

4. The electromagnetic protection device for circuit equipment according to claim 1, characterized in that: The mechanical control unit (3) comprises a double control structure (6) and a double contact structure (7), the double control structure comprising a mechanical switch and an electromagnetic switch, and the double contact structure (7) comprising two groups of contacts located opposite each other in the upper and lower positions.

5. The electromagnetic protection device for circuit equipment according to claim 1, characterized in that: The mechanical control unit (3) realizes the on and off of the control device through the physical position change of the spring and the contact. The button cooperates with the internal unlocking mechanism through the guide groove. When the electromagnetic chamber detects an abnormality and disconnects the circuit breaker due to overload, even if the push-pull spring is stuck by external stress, the mechanical chamber contact will still be disconnected synchronously and the spring will be released. When the external interference disappears, the spring interaction unit can be restored to the correct state.

6. The electromagnetic protection device for circuit equipment according to claim 1, characterized in that: The temperature compensation mechanism (5) is a thermal bimetallic strip, specifically comprising a primary and a secondary thermal bimetallic strip, and the primary and the secondary bimetallic strips move synchronously when the temperature changes.

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