Background
The surge protector, also called lightning protector, is an electronic device for providing safety protection for various electronic equipment, instruments and meters and communication lines. In low voltage distribution systems, when a spike current or voltage is suddenly generated in an electrical loop or a communication line due to interference from the outside, a surge protector can conduct shunt, such as overvoltage caused by lightning, in a very short time, so as to avoid damage to other devices in the loop caused by the surge.
The backup protection device is an external separator connected with the front end of the surge protector in series. The backup protection device of the new generation of surge protector has strong breaking capacity and higher surge tolerance, and the short-circuit action current of the backup protection device is far lower than that of the traditional backup protection device under the condition of taking the breaking capacity and the surge tolerance into consideration. The low short-circuit current can be effectively disconnected, and finer short-circuit protection is provided for the surge protector. When the current is more than 10A, the heat and fire burning speed of the surge protector is faster than the heat transfer speed, that is, the surge protector fires when the heat transfer has not reached the trip temperature, the external detacher must break the circuit before the surge protector fires, so as to prevent fire. When the surge protector passes lightning, the external disconnector cannot be tripped by mistake, so that the lightning protection of the electrical equipment is always in an effective state.
In order to ensure the normal and stable operation of the surge protector, the surge protector and the backup protector are connected to the power supply system in a separate serial connection mode, the space occupation rate is large, and in order to solve the problem that the volume is large in the separate serial connection mode, the Chinese patent CN118040627A discloses a special protection integrated surge protector which is used for combining the surge protector and the backup protector. However, the thermal tripping mechanism is complex in structure and untimely in response, and a good breaking effect cannot be effectively achieved after integration, so that the surge protector originally integrated into a whole is caused to have a fire risk.
Meanwhile, the complex structural design is unfavorable for production and processing, and the production efficiency can not be improved well.
Disclosure of utility model
Aiming at the defects existing in the prior art, the utility model aims to provide an integrated surge backup protector.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
The utility model provides an integral type surge backup protector, its includes the casing that has the enclosure space that comprises first casing and second casing, be equipped with the intermediate casing in the casing, just the intermediate casing will the enclosure space is divided into first space and second space, it still includes:
The backup protection module consists of a piezoresistor and a discharge tube, wherein the piezoresistor is arranged in the first space, the discharge tube passes through the middle shell and is arranged in the second space, and 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 trip to form an open circuit after receiving an abnormal temperature rise signal of the backup protection module, and comprises an electric conductor which is connected with the piezoresistor through low-melting-point material in an electrified manner and a power body which continuously gives an impetus for the electric conductor to move towards the tripping direction;
a handle rotatably disposed in the second space,
The release is arranged in the second space and is positioned between the handle and the discharge tube;
The tripping module is arranged in the second space, is in linkage arrangement with the handle, is positioned in front of the action route of the release, and can contact the fixed contact when the moving contact is switched on;
And the second pin is electrically connected with the moving contact of the tripping module.
The power body comprises a main body capable of moving relative to the vertical direction, a slot for bearing the conductor is formed in the main body, a first elastic piece for continuously providing an pushing force for the main body to move towards the tripping direction is arranged at the lower end of the main body, and an indicating piece is arranged at the upper end of the main body.
The upper end of the main body is provided with a chute, and the indicating piece is provided with a sliding block which is in sliding fit with the chute.
The positive and negative sides of the piezoresistor are respectively provided with a first electrode and a second electrode, wherein the first electrode is electrically connected with the conductor of the thermal tripping module through a low-melting-point material, and the second electrode is electrically connected with one pin of the discharge tube.
The intermediate shell is provided with a release mounting groove, the release is arranged in the release mounting groove, one end downside of the release is provided with a second elastic piece, and the second elastic piece continuously provides the movable iron core of the release with the pushing force moving in the direction away from the release module.
Positioning grooves are symmetrically formed in the inner wall of the release mounting groove, and positioning convex blocks are correspondingly arranged on the coil frameworks of the release.
The coil of the release is electrically connected with the discharge tube in parallel.
The middle shell is provided with a notch matched with the discharge tube.
And a support wall is arranged on one side of the notch, which is close to the moving contact, and a static contact electrically connected with the discharge tube is arranged on the inner side of the support wall.
The utility model has the beneficial effects that the backup protection module, the release, the thermal release module and the release module are integrally designed, before assembly, the assembly of the backup protection module and the release module can be directly completed, and then the assembly is sequentially carried out, so that the assembly difficulty is reduced, the production efficiency is improved, and meanwhile, the thermal release module is released to form a circuit breaker directly depending on the abnormal temperature rise of the piezoresistor, so that the response speed is improved.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear are used in the embodiments of the present utility model) are merely for explaining the relative positional relationship, movement conditions, and the like between the components in a certain specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicators are changed accordingly.
As shown in the figure, the utility model discloses an integrated surge backup protector, which comprises a shell 1, a handle, a release, a discharge tube and a tripping module, wherein the shell 1 is composed of a first shell 12 and a second shell 13 and is provided with a closed space, an intermediate shell 2 is arranged in the shell, the closed space is divided into a first space and a second space by the intermediate shell, and the integrated surge backup protector further comprises a piezoresistor and a thermal tripping module 3 which are arranged in the first space, and the handle, the release, the discharge tube and the tripping module which are arranged in the second space.
The backup protection module 4 is composed of a piezoresistor 41 and a discharge tube, the piezoresistor 41 and the discharge tube are directly welded and fixed into a whole, the piezoresistor is reserved before assembly, the piezoresistor is arranged in the first space, the discharge tube passes through the middle shell and is arranged in the second space, and one end of the discharge tube is electrically connected with a static contact.
The thermal tripping module 3 is arranged on one side of the backup protection module, can trip to form an open circuit after receiving an abnormal temperature rise signal of the backup protection module, comprises a conductor connected with the piezoresistor through low-melting-point material and a power body for continuously providing an impetus for the conductor to move towards the tripping direction, and can be integrally welded with the backup protection module.
And the handle 5 is rotatably arranged in the second space, and part of the handle is exposed out of the shell, so that the manual operation is facilitated.
And the release 7 is arranged in the second space and positioned between the handle and the discharge tube, and a coil of the release is electrically connected with the discharge tube in parallel.
The trip module 6 is assembled by all parts to form a complete structure, and can be directly used as a module, and the trip module belongs to the conventional technical means in the field of circuit breakers, so the trip module is not described in detail, is arranged in the second space, is in linkage arrangement with the handle, is positioned in front of the action route of the trip, and the moving contact 61 of the trip module can be contacted with the fixed contact during switching-on.
And the second pin is electrically connected with the moving contact of the tripping module.
According to the application, through modular design of each system, the assembly is more convenient and quick in the subsequent assembly, only the connected thermal tripping module and the backup protection module are required to be placed in the first shell, the intermediate shell is inserted between the piezoresistor and the discharge tube, so that the interior is divided into two spaces, then the tripping device, the tripping module and the handle are placed in sequence, the assembly can be completed, the production efficiency is greatly improved, the space utilization rate is high, and the volume of the whole surge backup protector can be reduced.
The power body comprises a main body 31 which can move relative to the vertical direction, a slot for bearing a conductor is formed in the main body, a first elastic piece which is continuously arranged at the lower end of the main body and is used for providing a pushing force for the main body to move towards the tripping direction is arranged at the upper end of the main body, an indicator 32 is arranged at the upper end of the main body, the conductor 33 is a metal sheet with one bent end, the bent end of the conductor is embedded in the slot, the other end of the conductor is electrically connected with a pin, the conductor is electrically connected with a piezoresistor, a complete loop design is realized, the conductor is connected with the piezoresistor through a low-melting-point material, the conductor is fused when the abnormal temperature of the piezoresistor rises, the piezoresistor is rapidly disconnected under the action of the first elastic piece, the piezoresistor is not conducted with the conductor, and an open circuit is formed at the position, so that the protection is achieved.
The first elastic piece is a spring, one end of the first elastic piece is in contact with the main body, the other end of the first elastic piece is in contact with the equipment shell or other fixed structures, and the spring is always in a stretching or compressing state under the condition that the backup protection module is kept in a normal state, and continuously gives force for the main body to move in a direction of being separated from a conductive connection state of the backup protection module.
The main part upper end is equipped with chute 311, the indicator be equipped with the chute constitutes slip complex slider, utilizes the cooperation of sliding of slider and chute, when the main part break away from with the conductive connection state direction of reserve protection module, this indicator is driven along the chute and removes, and then moves to the viewing aperture 11 department at the casing, realizes the effect of instruction.
The front and back surfaces of the piezoresistor 41 are respectively provided with a first electrode 411 and a second electrode 412, wherein the first electrode is electrically connected with the conductor of the thermal tripping module through a low-melting-point material, and the second electrode is electrically connected with one pin of the discharge tube.
Piezoresistors are common protection sensitive devices, and when the piezoresistors are subjected to overvoltage, and the voltage is higher than the clamping voltage, the piezoresistors conduct leakage current due to breakdown. In order to avoid the condition of residual current caused by the deterioration or the fault of the piezoresistor, a thermal tripping mechanism is adopted to protect the piezoresistor, so that the piezoresistor is prevented from heating and igniting.
The intermediate shell is provided with a release mounting groove 21, the release is arranged in the release mounting groove, one end downside of the release is provided with a second elastic piece 9, the second elastic piece continuously provides the movable iron core of the release with the pushing force for moving away from the release module direction, the second elastic piece is a torsion spring, and the force for restoring the movable iron core is provided.
The release is of an action structure with an electromagnetic coil, a group of movable iron cores capable of axially sliding are arranged in the release, and the movable iron cores push or attract corresponding movable contacts on an external release module to act, so that a circuit breaking effect is achieved.
The action signal is due to the fact that the coil in parallel connection with the circuit generates an induction magnetic field which pushes the movable iron core 71 to act when the power frequency current occurs. If the thermal tripping module cannot act in time under a certain condition, the tripping device is used as a backup protector, so that the reliability is improved.
The inner wall symmetry of release mounting groove is equipped with constant head tank 211, correspond on the coil skeleton of release and be equipped with the location lug, play spacing effect to the position of release, avoid the position of release to take place the skew, influence the effect of protection.
The middle shell is provided with a notch 22 which is matched with the discharge tube, the discharge tube is avoided by arranging the notch, meanwhile, the discharge tube is arranged in the second space, the mutual isolation between the thermal tripping module and the tripping module can be realized, and the influence of electric arcs during breaking on the thermal tripping module is avoided.
The gap is equipped with the supporting wall 23 near one side of moving contact, with the static contact of discharge tube electricity connection is set up in the supporting wall is inboard for support static contact 421, avoid the static contact to shift and lead to the phenomenon of contact failure to appear.
The examples should not be construed as limiting the utility model, but any modifications based on the spirit of the utility model should be within the scope of the utility model.