Integrated surge backup protector

Abstract

The integrated surge backup protector comprises a shell and a middle shell, the middle shell divides a closed space into a first space and a second space, the integrated surge backup protector further comprises a backup protection module, the backup protection module is composed of a piezoresistor and a discharge tube, the piezoresistor is arranged in the first space, the discharge tube penetrates through the middle shell to be arranged in the second space, and the discharge tube is arranged in the middle shell. One end of the discharge tube is electrically connected with a static contact; the thermal tripping module is arranged on one side of the backup protection module, can be tripped to form an open circuit after receiving an abnormal temperature rise signal of the backup protection module, and comprises an electric conductor which is electrically connected with the piezoresistor through a low-melting-point material and a power body which continuously provides a driving force for the electric conductor to move towards the tripping direction; a handle and a release; a tripping module; and two pins. Through the integrated design of the backup protection module, the release, the thermal release module and the release module, the assembly of the backup protection module and the release module can be directly completed before assembly, and then the backup protection module and the release module are sequentially installed, so that the installation difficulty is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model specifically relates to an integrated surge backup protector. Background Art

[0002] Surge protector, also called lightning arrester, is an electronic device that provides safety protection for various electronic equipment, instruments and meters, and communication lines. In low-voltage power distribution systems, when a spike current or voltage suddenly occurs in an electrical circuit or communication line due to external interference, the surge protector can conduct and shunt in a very short time, such as overvoltage caused by lightning, thereby preventing the surge from damaging other equipment in the circuit.

[0003] The backup protection device is an external disconnector connected in series with the front end of the surge protector. The new generation of surge protector backup protection devices has strong breaking capacity and higher surge tolerance. Taking into account the breaking capacity and surge tolerance, its short-circuit operating current is much lower than that of the traditional backup protection device. It can effectively disconnect low short-circuit currents and provide more sophisticated short-circuit protection for the surge protector. When the surge protector deteriorates (subjected to lightning current shock or transient overvoltage shock), causing the starting voltage to drop below the power supply voltage, the power frequency leakage current will increase rapidly. When this current is only a few amperes, the thermal tripping mechanism of the surge protector can disconnect the circuit; when the current is greater than 10A, the surge protector heats up and catches fire faster than the heat transfer speed, that is, the surge protector has caught fire before the heat transfer reaches the tripping temperature. This external disconnector must disconnect the circuit before the surge protector catches fire to prevent the occurrence of fire. When lightning current passes through the surge protector, this external disconnector will not trip by mistake, so that the lightning protection of electrical equipment is always in an effective state.

[0004] In the current conventional circuit, a surge protector is generally required, and in order to ensure the normal and stable operation of the surge protector, a backup protector is required. The two are connected to the power supply system in a separate series connection, which occupies a large space. In order to solve the problem that the two are connected in series in a separate way and have a large volume, Chinese patent CN118040627A discloses a special protection integrated surge protector, which proposes to combine the surge protector and the backup protector together. However, it has a complex thermal trip mechanism structure and untimely response. After integration, it cannot effectively achieve a good disconnection effect, which leads to the risk of fire in the originally integrated surge protector.

[0005] At the same time, the complex structural design is not conducive to production and processing, and cannot improve production efficiency well. Utility Model Content

[0006] In view of the deficiencies in the prior art, the purpose of the utility model is to provide an integrated surge backup protector.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] An integrated surge backup protector, comprising a housing having a closed space formed by a first housing and a second housing, wherein an intermediate housing is provided inside the housing, and the intermediate housing divides the closed space into a first space and a second space, and further comprising:

[0009] A backup protection module, which is composed of a varistor and a discharge tube, wherein the varistor is placed in the first space, the discharge tube passes through the intermediate housing and is placed in the second space, and one end of the discharge tube is electrically connected to a static contact;

[0010] The thermal trip module is arranged on one side of the backup protection module and can trip to form a circuit break after receiving an abnormal temperature rise signal from the backup protection module, and includes a conductor electrically connected to the varistor through a low melting point material and a power body that continuously gives the conductor a driving force to move in the tripping direction;

[0011] A handle is rotatably placed in the second space,

[0012] A release device is arranged in the second space and located between the handle and the discharge tube;

[0013] The trip module is arranged in the second space and is linked with the handle. The trip module is located in front of the action path of the trip device, and its moving contact can contact with the static contact when closing the circuit breaker.

[0014] Two pins, a first pin is electrically connected to the thermal trip module, and a second pin is electrically connected to the moving contact of the trip module.

[0015] The power body comprises a main body movable in a relative vertical direction, the main body is provided with a slot for carrying a conductor, the lower end of the main body is provided with a first elastic member for continuously giving the main body a driving force to move in a tripping direction, and the upper end of the main body is provided with an indicator.

[0016] An oblique groove is arranged at the upper end of the main body, and a sliding block which forms a sliding match with the oblique groove is arranged on the indicating member.

[0017] The front and back sides of the varistor are respectively provided with a first electrode and a second electrode, wherein the first electrode is electrically connected to the conductor of the thermal trip module through a low melting point material, and the second electrode is electrically connected to a pin of the discharge tube.

[0018] The intermediate housing is provided with a release installation slot, the release is arranged in the release installation slot, and a second elastic member is provided on the lower side of one end of the release, and the second elastic member continuously provides a driving force for the moving iron core of the release to move away from the release module.

[0019] The inner wall of the release installation slot is symmetrically provided with positioning slots, and the coil frame of the release is correspondingly provided with positioning protrusions.

[0020] The coil of the release is electrically connected in parallel with the discharge tube.

[0021] The intermediate housing has a notch matched with the discharge tube.

[0022] A support wall is provided on one side of the notch close to the moving contact, and a static contact electrically connected to the discharge tube is arranged on the inner side of the support wall.

[0023] The beneficial effects of the utility model are as follows: by integrating the backup protection module, the release, the thermal trip module and the trip module into an integrated design, the backup protection module and the trip module can be directly assembled before assembly, and then installed in sequence, thereby reducing the difficulty of installation and improving production efficiency. At the same time, the thermal trip module is tripped directly by the abnormal temperature rise of the varistor to form a short circuit, thereby improving the response speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the utility model.

[0025] Figure 2 It is an explosion diagram of the utility model.

[0026] Figure 3 It is a schematic diagram of the structure in the first space of the utility model.

[0027] Figure 4 It is a schematic diagram of the structure in the second space of the utility model.

[0028] Figure 5 It is a schematic diagram of the structure of the thermal release module.

[0029] Figure 6 It is a schematic diagram of the structure of the intermediate shell. DETAILED DESCRIPTION

[0030] 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 of 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.

[0031] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] As shown in the figure, the utility model discloses an integrated surge backup protector, which includes a shell 1 with a closed space composed of a first shell 12 and a second shell 13, an intermediate shell 2 is arranged in the shell, and the intermediate shell divides the closed space into a first space and a second space, and also includes a varistor and a thermal trip module 3 arranged in the first space and a handle, a trip device, a discharge tube and a trip module arranged in the second space.

[0033] The backup protection module 4 is composed of a varistor 41 and a discharge tube, which are directly welded and fixed into a whole and are used as a backup before assembly. The varistor is placed in the first space, and the discharge tube passes through the intermediate shell and is placed in the second space, and one end of the discharge tube is electrically connected to a static contact.

[0034] The thermal trip module 3 is arranged on one side of the backup protection module, and can trip to form a short circuit after receiving an abnormal temperature rise signal from the backup protection module. It includes a conductor electrically connected to the varistor through a low-melting-point material and a power body that continuously gives the conductor a driving force to move in the tripping direction. The thermal trip module can be fixed to the backup protection module as a whole by welding.

[0035] The handle 5 can be rotatably placed in the second space, with a portion of the handle exposed from the housing for easy manual operation.

[0036] The release device 7 is arranged in the second space and is located between the handle and the discharge tube. The coil of the release device is electrically connected in parallel with the discharge tube.

[0037] The trip module 6 is assembled from various parts to form a complete structure and can be used directly as a module. The trip module is a conventional technical means in the field of circuit breakers, so this application does not describe the structure in detail. It is arranged in the second space and is linked with the handle. It is located in front of the action path of the tripper, and its moving contact 61 can contact the static contact when closing the circuit breaker.

[0038] Two pins, a first pin is electrically connected to the thermal trip module, and a second pin is electrically connected to the moving contact of the trip module.

[0039] The present application makes subsequent assembly more convenient and quick by modularizing the design of each system. It only needs to place the connected thermal trip module and the backup protection module into the first shell, and insert the intermediate shell between the varistor and the discharge tube to divide the interior into two spaces. Then, the tripper, the trip module and the handle are placed in turn to complete the assembly, which greatly improves the production efficiency and has high space utilization, and can reduce the volume of the entire surge backup protector.

[0040] The power body includes a main body 31 that can move in a relatively vertical direction, a slot for carrying a conductor is provided on the main body, a first elastic member is provided at the lower end of the main body for continuously giving the main body a driving force to move in the tripping direction, an indicator 32 is provided at the upper end of the main body, and the conductor 33 is a metal sheet with one end bent, the bent end of which is embedded in the slot, and the other end is electrically connected to a pin, and the conductor is electrically connected to the varistor to achieve a complete circuit design, and the conductor and the varistor are connected by a low melting point material, which melts when the varistor has an abnormal temperature rise, and then quickly disconnects under the action of the first elastic member, so that the varistor is no longer connected to the conductor, forming a short circuit here, which plays a protective role.

[0041] The first elastic member is a spring, one end of which is in contact with the main body, and the other end of which is in contact with the device housing or other fixed structure. When the backup protection module remains in a normal state, the spring is always in a stretched or compressed state, continuously giving the main body a force to move in the direction of breaking away from the conductive connection state with the backup protection module.

[0042] An inclined groove 311 is provided at the upper end of the main body, and the indicator is provided with a slider that forms a sliding fit with the inclined groove. By utilizing the sliding fit between the slider and the inclined groove, when the main body is separated from the conductive connection state with the backup protection module, the indicator is driven to move along the inclined groove, and then moves to the observation port 11 of the shell to achieve the indication effect.

[0043] The front and back sides of the varistor 41 are respectively provided with a first electrode 411 and a second electrode 412 , wherein the first electrode is electrically connected to the conductor of the thermal trip module through a low melting point material, and the second electrode is electrically connected to a pin of the discharge tube.

[0044] Varistors are commonly used to protect sensitive devices. When they are subjected to overvoltage, when their voltage is high enough to be greater than the clamping voltage, they will break down and conduct current. In order to avoid residual current caused by degradation or failure of the varistor, a thermal trip mechanism is used to protect it from heating and fire.

[0045] The intermediate shell is provided with a release installation groove 21, the release is arranged in the release installation groove, and a second elastic member 9 is provided on the lower side of one end thereof, the second elastic member continuously gives a driving force to the moving iron core of the release away from the tripping module. The second elastic member is a torsion spring, which gives the moving iron core a force to reset.

[0046] The release is an action structure with an electromagnetic coil, which has a set of axially slidable moving iron cores inside. The moving iron cores push or attract the corresponding moving contacts on the external release module to move, thereby achieving a circuit-breaking effect.

[0047] The action signal is that the coil connected in parallel to the circuit will generate an induced magnetic field that drives the moving iron core 71 when the power frequency current appears. If the thermal release module cannot be activated in time under certain conditions, the releaser is used as a backup protector to increase reliability.

[0048] The inner wall of the release installation slot is symmetrically provided with positioning slots 211, and the coil frame of the release is correspondingly provided with positioning protrusions to limit the position of the release, thereby preventing the position of the release from being offset and affecting the protection function.

[0049] The intermediate shell has a notch 22 adapted to the discharge tube. The notch is provided to avoid the discharge tube. The discharge tube is placed in the second space, and the thermal trip module and the trip module can be isolated from each other to avoid the arc during disconnection from affecting the thermal trip module.

[0050] A support wall 23 is provided on one side of the notch close to the moving contact, and a static contact electrically connected to the discharge tube is arranged on the inner side of the support wall to support the static contact 421 to avoid poor contact caused by displacement of the static contact.

[0051] The embodiments should not be regarded as limiting the present invention, but any improvements based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. An integrated surge backup protector, comprising a housing having a closed space formed by a first housing and a second housing, characterized in that: An intermediate shell is disposed inside the shell, and the intermediate shell divides the enclosed space into a first space and a second space, and further includes: A backup protection module, which is composed of a varistor and a discharge tube, wherein the varistor is placed in the first space, the discharge tube passes through the intermediate housing and is placed in the second space, and one end of the discharge tube is electrically connected to a static contact; The thermal trip module is arranged on one side of the backup protection module and can trip to form a circuit break after receiving an abnormal temperature rise signal from the backup protection module, and includes a conductor electrically connected to the varistor through a low melting point material and a power body that continuously gives the conductor a driving force to move in the tripping direction; The handle can be rotatably placed in the second space, A release device is arranged in the second space and located between the handle and the discharge tube; The trip module is arranged in the second space and is linked with the handle. The trip module is located in front of the action path of the trip device, and its moving contact can contact with the static contact when closing the circuit breaker. Two pins, a first pin is electrically connected to the thermal trip module, and a second pin is electrically connected to the moving contact of the trip module.

2. The integrated surge backup protector according to claim 1, characterized in that: The power body comprises a main body movable in a relative vertical direction, the main body is provided with a slot for carrying a conductor, the lower end of the main body is provided with a first elastic member for continuously giving the main body a driving force to move in a tripping direction, and the upper end of the main body is provided with an indicator.

3. The integrated surge backup protector according to claim 2, characterized in that: An oblique groove is arranged at the upper end of the main body, and a sliding block which forms a sliding match with the oblique groove is arranged on the indicating member.

4. The integrated surge backup protector according to claim 1, characterized in that: The front and back sides of the varistor are respectively provided with a first electrode and a second electrode, wherein the first electrode is electrically connected to the conductor of the thermal trip module through a low melting point material, and the second electrode is electrically connected to a pin of the discharge tube.

5. The integrated surge backup protector according to claim 1, characterized in that: The intermediate housing is provided with a release installation slot, the release is arranged in the release installation slot, and a second elastic member is provided on the lower side of one end of the release, and the second elastic member continuously provides a driving force for the moving iron core of the release to move away from the release module.

6. The integrated surge backup protector according to claim 5, characterized in that: The inner wall of the release installation slot is symmetrically provided with positioning slots, and the coil frame of the release is correspondingly provided with positioning protrusions.

7. The integrated surge backup protector according to claim 1, characterized in that: The coil of the release is electrically connected in parallel with the discharge tube.

8. The integrated surge backup protector according to claim 1, characterized in that: The intermediate housing has a notch matched with the discharge tube.

9. The integrated surge backup protector according to claim 8, characterized in that: A support wall is provided on one side of the notch close to the moving contact, and a static contact electrically connected to the discharge tube is arranged on the inner side of the support wall.

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