CN116845841A - Surge protector with built-in fuse - Google Patents

Abstract

The application relates to a surge protector with a built-in fuse, and belongs to the technical field of surge protection. The surge protector with the built-in fuse comprises a shell, a surge protection module and a fuse component, wherein two first isolation cavities are formed in the shell, the surge protection module and the fuse component are respectively located in the two first isolation cavities, and the surge protection module and the fuse component are distributed side by side and are connected in series. The surge protection module is used for preventing instantaneous overvoltage and overcurrent from damaging equipment or devices, and the fuse assembly is used as backup protection of the surge protection module, so that the surge protection module can be timely disconnected from a circuit when fault current cannot be disconnected after the surge protection module fails or when an action mechanism fails. The surge protection module and the fuse assembly are integrated into a whole, so that the problem that the volume of the distribution box is required to be increased due to the fact that the distribution box occupies the space of the distribution box due to the fact that the external SPD backup fuse is used can be effectively solved.

Description

Surge protector with built-in fuse

Technical Field

The application belongs to the technical field of surge protection, and particularly relates to a surge protector with a built-in fuse.

Background

The surge protector, also called a lightning protector, a surge protector, an overvoltage protector and the like, can prevent lightning stroke and provides safety protection for various electronic equipment, instruments, communication lines and the like. The surge protector can limit the instantaneous overvoltage of the power line and the signal transmission line to the voltage range which can be born by the equipment or the system, or discharge the surge current which invades the main loop to the ground, so as to avoid the damage of the equipment or the system caused by the impact.

The fuse is a protection device which is connected with the main circuit when the fault current of the protected circuit exceeds a specified value and the energy flowing through the fuse reaches the rated value of melt fusing; the melt of the fuse is a critical element in controlling the fusing characteristics, which are determined by the material, size and shape of the melt. The surge protector needs to be provided with a fuse for use together, so that the problem that a tripping device cannot break fault current after the surge protector fails or the system is burnt or short-circuited after the tripping device fails is avoided.

In the prior art, a backup fuse for a surge protector is usually installed at the front end of the surge protector, and the backup fuse and the surge protector are connected in parallel in a protected loop after being connected in series, so that the backup fuse has the main effects that after the surge protector fails, the connection between the surge protector and a main loop can be timely disconnected after a tripping device fails to break fault current or a tripping mechanism fails, but the backup fuse and the surge protector are required to be connected independently during installation, thereby the problems of reduction of protection effect, mixed wiring, more complex maintenance, higher cost and the like are caused. And the two are independently arranged, so that the occupied space of the case is larger, and the problems are most remarkable in medium-high voltage systems with the voltages of more than 1000V alternating current and direct current.

Disclosure of Invention

In view of the above, the present application aims to provide a surge protector with built-in fuse, which has insulation performance that can be normally applied to medium-high voltage systems with ac and dc of 1000V or more, and integrates a surge protection module and a fuse assembly, and the surge protector with built-in fuse has smaller volume, smaller occupied space, simple circuit and easy maintenance, and can effectively improve the safety of the application of the high voltage system because the internal devices are provided with independent installation chambers, and the fuse assembly and the surge protection module are connected and matched in the housing before leaving the factory, so that the field installation is more convenient.

The technical scheme of the application is as follows:

the application provides a surge protector with a built-in fuse, which comprises a shell, a surge protection module and the fuse, wherein two first isolation cavities are arranged in the shell, the surge protection module and the fuse are respectively positioned in the two first isolation cavities, and the surge protection module and the fuse are distributed side by side and are connected in series.

As an alternative to the above technical solution, the surge protection device further comprises a switch protection device, wherein the surge protection module, the switch protection device and the fuse assembly are sequentially connected in series.

As an alternative to the above technical solution, the housing further includes a second isolation cavity, the second isolation cavity is adjacent to one end of the two first isolation cavities and is independently disposed, and the switch protection device is located in the second isolation cavity.

As an alternative scheme of the technical scheme, a plurality of supporting parting strips are arranged in the first isolation cavity, and the supporting parting strips are arranged at intervals along the length direction of the first isolation cavity.

As an alternative scheme of the technical scheme, the intelligent remote signaling system further comprises a centralized remote signaling connector and at least two remote signaling alarm components, wherein the at least two remote signaling alarm components are respectively and electrically connected with the centralized remote signaling connector, the fuse component and the surge protection module are respectively and correspondingly provided with the remote signaling alarm components, and when the fuse component or the surge protection module fails, the corresponding remote signaling alarm components can be triggered.

As an alternative to the above technical solution, the fuse assembly and the corresponding remote signaling alarm assembly are located in the same first isolation cavity, and the surge protection module and the corresponding remote signaling alarm assembly are located in the same first isolation cavity. By this arrangement, the withstand voltage characteristic of the surge protector can be improved.

As an alternative of the above technical solution, one end of the fuse assembly is provided with a triggering assembly, the triggering assembly includes a telescopic firing pin, and when the fuse assembly fuses, the firing pin can extend out and trigger the corresponding remote signaling alarm assembly.

As an alternative to the above solution, the surge protection module comprises at least two protection elements connected in series.

As an alternative to the above solution, the surge protection module comprises a protection element.

As an alternative to the above solution, the surge protection module comprises at least two protection elements connected in parallel.

As an alternative scheme of the above technical scheme, the surge protection module further comprises a base and an arc-shaped separation elastic piece, the middle part of the separation elastic piece is fixed on the base through a threaded fastener, two protection elements are provided with low-temperature tripping welding tables, and two ends of the separation elastic piece are welded with the two low-temperature tripping welding tables through low-temperature solder respectively.

As an alternative of the above technical solution, the surge protector further includes an arc shielding assembly, the arc shielding assembly includes an arc shielding slider and a first spring, the arc shielding slider is slidably disposed on the base, and the first spring makes the arc shielding slider have a tendency of being inserted between the disengagement elastic piece and the low-temperature trip welding table.

As an alternative of the above technical solution, the housing is provided with an observation hole, the surge protection module is provided with a first identification portion with a fixed position, the arc shielding slide is provided with a second identification portion, the first identification portion and the second identification portion are different in color, and in the sliding process of the arc shielding slide, the first identification portion or the second identification portion can be opposite to the observation hole.

The beneficial effects of the application are as follows:

the surge protector with the built-in fuse is characterized in that the shell is used for accommodating the surge protection module and the fuse assembly, the surge protection module is used for preventing instantaneous overvoltage and lightning surge intruding into a loop, the fuse assembly is used as backup protection for the surge protection module when failure of breaking fault current or failure of an action mechanism occurs, the surge protection module and the main circuit can be timely broken when failure of the action mechanism occurs, and the surge protection module and the fuse assembly are integrated into a whole. In addition, the surge protector with small volume has high breaking, high current capacity and higher insulation pressure resistance, has more outstanding use scene and effect, can be applied to medium-high voltage systems with alternating current and direct current of more than 1000V, and can solve the problem that the surge protector with built-in fuses is lacking in the current market in the medium-high voltage systems.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. The above and other objects, features and advantages of the present application will become more apparent from the accompanying drawings. Like reference numerals refer to like parts throughout the several views of the drawings. The drawings are not intended to be drawn to scale, with emphasis instead being placed upon illustrating the principles of the application.

Fig. 1 is a schematic structural diagram of a surge protector according to a first embodiment of the present application;

fig. 2 is a schematic structural diagram of a surge protector according to a first embodiment of the present application;

fig. 3 is a schematic view of a surge protector according to a first embodiment of the present application;

fig. 4 is a schematic structural diagram of a housing of a surge protector according to a first embodiment of the present application;

fig. 5 is a schematic structural diagram of a case of a surge protector according to a first embodiment of the present application;

fig. 6 is a schematic structural diagram of a cover of a surge protector according to a first embodiment of the present application;

fig. 7 is a schematic diagram of a surge protector according to a first embodiment of the present application;

fig. 8 is a schematic structural diagram of a surge protection module of a surge protector according to a second embodiment of the present application;

fig. 9 is a schematic structural diagram of a surge protection module of a surge protector according to a second embodiment of the present application;

fig. 10 is a schematic diagram III of a surge protection module of a surge protector according to a second embodiment of the present application;

fig. 11 is a schematic structural diagram of a surge protector according to a third embodiment of the present application;

fig. 12 is a schematic view of a surge protector according to a third embodiment of the present application;

fig. 13 is a schematic diagram of a surge protector according to a third embodiment of the present application;

fig. 14 is a schematic view of a surge protector according to a third embodiment of the present application;

fig. 15 is a schematic structural diagram of a cover of a surge protector according to a third embodiment of the present application.

Icon: 10-a surge protector; 11-a housing; 12-a surge protection module; 14-a fuse; 15-a switch-like protection device; 16-centralized remote signaling connection; 110-a box; 111-cover; 112-a first isolation chamber; 113-a second isolation chamber; 114-supporting the division bars; 115-observation hole; 120-a protective element; 121-a base; 122-disengaging the shrapnel; 123-threaded fasteners; 124-a low-temperature tripping welding table; 125-limit posts; 126-low temperature trip weld; 130-arc shielding assembly; 131-arc shielding slide blocks; 132-a first spring; 133-a first identification portion; 134-a second identification part; 140-a trigger assembly; 141-firing pin; 160-remote signaling alert component.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Example 1

Referring to fig. 1 and 2, a first embodiment of the present application provides a surge protector 10 with a built-in fuse, which can provide safety protection under lightning surge for various electronic devices, instruments and meters, etc.

As shown in fig. 3, the surge protector 10 is mainly composed of a housing 11, a surge protection module 12 and a fuse assembly 14, wherein the surge protection module 12 and the fuse assembly 14 are disposed in the housing 11, and each component is described in detail below.

Referring to fig. 4-6, the housing 11 is generally composed of two parts, namely a case 110 and a cover 111, wherein one side of the case 110 is opened to facilitate placement of other components, the cover 111 can be arranged on the case 110 in a covering manner, and the opening of the case 110 is closed to enable the other components to be in a relatively closed environment, and the internal structures of the case 110 and the cover 111 are not limited.

The shape of the housing 11 is not limited, and may be set as necessary, for example, the housing 11 may have a substantially rectangular parallelepiped shape, a cylindrical shape, an irregular shape, or the like. The housing 11 is made of an insulating material such as plastic or the like.

Two first isolation cavities 112 are arranged in the shell 11, the cross section of each first isolation cavity 112 is approximately rectangular, the two first isolation cavities 112 are arranged side by side, and the two first isolation cavities 112 are isolated by a partition plate.

The structure of the surge protection module 12 is not limited and reference may be made to the prior art, for example, the surge protection module 12 is mainly composed of a varistor and a low-temperature welded assembly. Taking the surge protection module 12 as an example, a voltage limiting device such as a varistor is adopted as the surge protection module 12, the surge protection module 12 can bear the impact of multiple instantaneous lightning surges within a tolerance range based on the electrical characteristics of the surge protection module, and then the surge protection module is restored to a high-resistance state and automatically reset, so that the surge protection module can be repeatedly used. If a lightning surge is excessive, or its lifetime expires, the protector may fail and the cryowelded assembly is disengaged.

The structure of the fuse assembly 14 is not limited, and reference may be made to the prior art in which the fuse assembly 14 is internally provided with a melt. When the current flowing through the fuse assembly 14 is normal and within the withstand range, the fuse assembly 14 can operate normally; when the current flowing through the fuse assembly 14 exceeds a preset current threshold for a certain period of time, the melt melts, breaking the current and opening the connected circuit.

The structure of the surge protection module 12 and the fuse assembly 14, which are not mentioned, may be referred to in the prior art, and will not be described herein.

The surge protection module 12 is located in one of the first isolation chambers 112, the fuse assembly 14 is located in the other first isolation chamber 112, the surge protection module 12 and the fuse assembly 14 are distributed side by side, the surge protection module 12 and the fuse assembly 14 are connected in series with each other through wires or conductive sheets, and an end of the surge protection module 12 away from the fuse assembly 14 and an end of the fuse assembly 14 away from the surge protection module 12 may be provided with an electrode tab so as to be electrically connected with an external circuit.

The height of the first isolation cavity 112 may be greater than the height of the surge protection module 12 or the fuse assembly 14 to prevent the two components from interfering with each other. Of course, in other embodiments, the height of the first isolation cavity 112 may also be less than the height of the surge protection module 12 or the fuse assembly 14.

In order to make the surge protection module 12 and the fuse assembly 14 integrated, the size of the surge protector 10 is smaller, and in some embodiments, the fuse assembly 14 can be designed smaller, to meet large current requirements with smaller volumes, and can be integrated within the housing 11, and improvements can be made in three ways to reduce the volume of the fuse assembly 14, relative to conventional fuses.

1. Standard requirements, gG products, in GB/T13539.2 national standard, are temperature rise power consumption, fusing time, threshold and I of the products ² t, even the overall dimensions, are mandatory. The product of the fuse component 14 as the lightning protection backup protection has no mandatory requirement in the standard, and the parameters mainly needing to be considered are only the requirements of lightning impulse and breaking capacity; other parameters may not be of concern in designing the fuse assembly 14 in this embodiment, and therefore the acceptable physical dimensions may be evaluated based on actual electrical requirements.

2. The breaking capacity of the traditional fuse can reach 120kA at maximum, and in order to meet the maximum breaking of 120kA under high voltage, the traditional fuse is generally designed into an inserted structural design with a base, and the size of the traditional fuse is larger. As the anti-lightning backup protection fuse assembly 14 only needs to consider the anti-surge current impact characteristic, so that the space for reducing the product size is provided, and the application designs the fuse assembly 14 into a cylindrical integrated design so as to meet the requirement of small volume.

3. The minimum breaking range, gG class products, the national standard GB 13539.1 mandates that the minimum breaking is started from 2I n, the through-flow time is long when the minimum breaking is performed, and the product size is required to be larger. The lightning protection product is designed according to class a, the minimum breaking through-flow time is short, the product size can be designed into a small volume according to the minimum breaking current time, in the application, the minimum breaking of the fuse assembly 14 is increased, so that the through-flow time during the minimum breaking is short, and the product size of the fuse assembly 14 is correspondingly reduced.

The surge protector 10 provided in this embodiment has the characteristics of high voltage, high breaking and high through-flow, and the size of the fuse assembly 14 is small.

In addition, in order to reduce the leakage current, improve the voltage withstand capability and increase the service life of the power surge protector, a switch protection device 15 is usually disposed in the circuit, in this embodiment, the switch protection device 15 may use a gas discharge tube, the working principle of the gas discharge tube is gas discharge, when the applied voltage increases to exceed the insulation strength between the inner electrodes, the gap between the two electrodes breaks down the discharge, the original insulation state is converted into the conductive state, and the voltage between the two electrodes of the discharge tube is maintained at the residual voltage level determined by the discharge arc channel after the conduction. In the prior art, since the switch-type protection device 15 and the fuse assembly 14 are separately provided, the switch-type protection device 15 is typically provided at one end of the surge protection module 12 or one end of the fuse assembly 14, in such a way that an additional connection member needs to be added between the surge protection module 12 and the fuse assembly 14.

In this embodiment, as shown in fig. 7, a switch-like protection device 15 is disposed between the surge protection module 12 and the fuse assembly 14, and both ends of the switch-like protection device 15 are electrically connected to the surge protection module 12 and the fuse assembly 14, respectively, that is, the surge protection module 12, the switch-like protection device 15 and the fuse assembly 14 are sequentially connected in series. By the arrangement, the number of connecting pieces of the surge protector 10 can be reduced, the switch type protection device 15 can be far away from the piezoresistor of the surge protector module 12, electromagnetic interference between strong electricity is avoided, and reliability is higher.

In order to place the switch-type protection device 15, in the present embodiment, the following scheme may be adopted, but is not limited to: the housing 11 further comprises a second isolation cavity 113, the second isolation cavity 113 being adjacent to one end of the two first isolation cavities 112, the first isolation cavities 112 and the second isolation cavities 113 being isolated from each other and being arranged independently, the switch-like protection device 15 being located in the second isolation cavity 113, the connection of the switch-like protection device 15 to the connection piece of the surge protection module 12 or the switch-like protection device 15 to the fuse assembly 14 being achieved by means of a conducting strip or wire through the partition plates of the first isolation cavities 112 and the second isolation cavities 113.

The second isolation cavity 113 may have a smaller size, and may be slightly larger than the size of the switch-type protection device 15, so as to limit the switch-type protection device 15. The second isolation chamber 113 is isolated from the first isolation chamber 112, and electrical isolation is achieved between the switch-like protection device 15 and the surge protection module 12, and between the switch-like protection device 15 and the fuse assembly 14, without mutual influence.

In some other embodiments, the surge protector 10 does not include the switch-type protection device 15, or it is also possible to place the switch-type protection device 15 in other locations, for example, where the surge protection module 12 is directly connected to the fuse assembly 14, and the switch-type protection device 15 is disposed at the front end of the surge protection module 12 or at the rear end of the fuse assembly 14.

Furthermore, the surge protector 10 may present a risk of insulation breakdown during a lightning strike surge or during long term loading at medium-high voltages. Thus, in this embodiment, the following modifications may be made using, but are not limited to: a plurality of supporting division bars 114 may be disposed in the first isolation cavity 112, and the plurality of supporting division bars 114 are disposed at intervals along the length direction of the first isolation cavity 112. The length of the first isolation cavity 112 may be aligned with the length of the surge protection module 12 and the length of the fuse assembly 14.

The number of supporting spacers 114 within each first isolated cavity 112 is not limited, e.g., two, three, four, etc. The structure and location of the supporting division bar 114 are not limited, and for example, the supporting division bar 114 may be a bar-shaped plate, a triangle plate, a C-shaped plate, or the like. In this embodiment, the supporting spacer 114 in the first isolation chamber 112 corresponding to the surge protection module 12 may be a strip-shaped plate vertically disposed on one side of the partition between the two first isolation chambers 112. The supporting spacer bars 114 in the first isolation cavity 112 corresponding to the fuse assembly 14 may be C-shaped, and disposed at two sides and bottom of the first isolation cavity 112, respectively, and the fuse assembly 14 may be embedded in the supporting spacer bars 114.

The supporting division bar 114 can increase the insulation distance, cool the electric arc to achieve the purpose of extinguishing the electric arc rapidly, and the supporting division bar 114 can also play the role of reinforcing ribs, so that the structural strength of the first isolation cavity 112 is higher, and the overall strength and the anti-beating impact capability of the surge protector 10 are higher.

Of course, in some other embodiments, the support bars 114 are not disposed within the first isolation chamber 112, or it is possible that one of the first isolation chambers 112 is disposed with the support bars 114 and the other first isolation chamber 112 is not disposed with the support bars 114.

Example two

The second embodiment of the present application provides a surge protector with built-in fuse 10, and the surge protector 10 is further improved on the basis of the first embodiment, and the part which is not mentioned in the present embodiment can refer to the first embodiment or the prior art.

Compared with the first embodiment, the improvement point of the present embodiment is that: as shown in fig. 8-10, the surge protection module 12 includes at least two protection elements 120, where the protection elements 120 may be piezoresistors or transient suppression diodes, and the number of the protection elements 120 may be set according to requirements, for example, two, three, four, etc., and in this embodiment, the number of the protection elements 120 is two, and the two protection elements 120 are connected in series.

In some other embodiments, other technical solutions may also be adopted, for example: the surge protection module 12 contains only one protection element 120; or the surge protection module 12 comprises at least two protection elements 120 and the at least two protection elements 120 are connected in parallel with each other.

The surge protection module 12 may be provided with a notch, the notch is located between the two protection elements 120, a baffle is disposed in the corresponding first isolation cavity 112, and the baffle is inserted into the notch, so that the two protection elements 120 may be separated by the baffle, so that the two protection elements 120 may not affect each other.

By the arrangement, the surge protection module 12 is thinner and smaller in volume, and the electric design meets the requirements of medium-high voltage protection of more than 1000V of alternating current and direct current.

Each protection element 120 may be correspondingly provided with a release spring 122, and the release springs 122 corresponding to the two protection elements 120 may be independently provided or may be integrally formed.

In this embodiment, the surge protection module 12 further includes a base 121 and a disengaging spring 122, and a middle portion of the disengaging spring 122 is fixed to one side of the base 121 by a threaded fastener 123 such as a screw, a bolt, or the like. In the prior art, the release spring 122 is generally fixed to the base 121 by adopting an interference fit or a clamping connection, and the release spring 122 is unstable in this way and is easy to deform or move in production, so that the surge protection module 12 is not easy to trip or is too easy to trip in practical application, and the failure rate is higher. The middle part of the release spring 122 is fixed by the threaded fastener 123, so that the actions of the two sides of the release spring 122 are not affected each other, and the connection between the release spring 122 and the base 121 is more firm.

The number of the threaded fasteners 123 is not limited, for example, one, two, three, etc., and in this embodiment, the middle portion of the release spring 122 is fixed to the base 121 by two threaded fasteners 123. Specifically, a fixing hole may be provided on the release spring 122, a threaded hole is provided on the base 121, and a threaded fastener 123 passes through the fixing hole and is in threaded engagement with the threaded hole, where the threaded fastener 123 compresses and fixes the release spring 122 on the base 121.

In some embodiments, the seat 121 and the release spring 122 may be further provided with a limiting post 125 and a limiting hole, for example, the seat 121 is provided with the limiting post 125 and the release spring 122 is provided with the limiting hole, or the seat 121 is provided with the limiting hole and the release spring 122 is provided with the limiting post 125, and the number of the limiting posts 125 and the limiting holes is not limited and corresponds to each other one by one. When the release spring 122 is mounted on the base 121, the limit post 125 is inserted into the limit hole first, so that the release spring 122 is positioned, the fixing hole is opposite to the threaded hole, and then the release spring 122 is fixed by using the threaded fastener 123, so that the release spring 122 is mounted more accurately and smoothly. The positions of the limiting post 125 and the limiting hole are not limited as long as the positions of the two are matched.

The release spring 122 may be in an arc shape, two ends of the release spring 122 are respectively provided with a low-temperature release welding part 126, two protection elements 120 are respectively provided with a low-temperature release welding table 124, the low-temperature release welding tables 124 and the low-temperature release welding parts 126 are in one-to-one correspondence, and the low-temperature release welding tables 124 and the low-temperature release welding parts 126 are welded by low-temperature solder. This connection may refer to the prior art, in which, at low temperature or normal temperature, the low temperature trip welding stage 124 and the low temperature trip welding portion 126 are kept in a connected state all the time, when the instantaneous overvoltage or overcurrent exceeds the electrical parameter range of the surge protection module 12 or the surge protection module 12 fails, the temperature of the device increases, and the low temperature solder melts, so that the low temperature trip welding stage 124 and the low temperature trip welding portion 126 are separated from contact, i.e. the protection element 120 is disconnected from the separation spring piece 122, and the surge protection module 12 fails.

In addition, when the low temperature trip welding stage 124 and the low temperature trip welding portion 126 are separated, in order to effectively disconnect the two, the arc shielding assemblies 130 are generally used for shielding, and the number of the arc shielding assemblies 130 is matched with that of the low temperature trip welding stages 124, that is, each low temperature trip welding stage 124 is correspondingly provided with one arc shielding assembly 130. The structure of the arc shielding assembly 130 may employ, but is not limited to, the following: including an arc-covering slider 131 and a first spring 132.

The arc shielding sliding block 131 is made of insulating materials, and is located between the separation elastic sheet 122 and the base 121, the shape of the arc shielding sliding block 131 is not limited, the arc shielding sliding block 131 is in sliding connection with the base 121, and the sliding fit mode of the arc shielding sliding block 131 and the base 121 is not limited, for example, a sliding rail is arranged on the base 121, a sliding groove is arranged on the arc shielding sliding block 131, and the sliding rail is matched with the sliding groove, so that the arc shielding sliding block 131 can slide along the sliding rail relative to the base 121.

The first springs 132 may be compression springs or tension springs, in this embodiment, the first springs 132 are tension springs, one ends of the first springs 132 are fixedly connected with the arc shielding sliding blocks 131, the other ends of the first springs are fixedly connected with the base 121, and each arc shielding sliding block 131 may be connected with a plurality of first springs 132.

The tension spring is stretched in the initial state, the tension spring has a shrinkage trend, so that the first spring 132 enables the arc shielding slider 131 to have a trend of being inserted between the release spring piece 122 and the low-temperature trip welding table 124, namely, after the low-temperature trip welding portion 126 is separated from the low-temperature trip welding table 124, the first spring 132 can push the arc shielding slider 131 to slide along the base 121, so that the arc shielding slider 131 is inserted between the low-temperature trip welding portion 126 and the low-temperature trip welding table 124, and abnormal contact cannot occur between the low-temperature trip welding portion 126 and the low-temperature trip welding table 124 due to the fact that the arc shielding slider 131 is separated from the low-temperature trip welding portion 126.

Example III

Referring to fig. 11 and 12, a third embodiment of the present application provides a surge protector with built-in fuse 10, and the surge protector 10 is further improved based on the first embodiment or the second embodiment, and the non-mentioned part of the present embodiment can refer to the first embodiment or the second embodiment or the prior art.

Compared with the first embodiment, the improvement point of the present embodiment is that: as shown in fig. 13 and 14, the surge protector 10 further includes a centralized remote signaling connector 16 and at least two remote signaling alarm assemblies 160, where the number of the remote signaling alarm assemblies 160 can be determined according to the number of the fuse assemblies 14 and the protection elements 120 of the surge protector 10, and generally speaking, the fuse assemblies 14 are correspondingly provided with one remote signaling alarm assembly 160, and each protection element 120 of the surge protector module 12 is correspondingly provided with one remote signaling alarm assembly 160. For example, in the first embodiment, the surge protection module 12 includes two protection elements 120, and thus, each protection element 120 corresponds to one remote signaling alert assembly 160, then in this case, the surge protector 10 is provided with three remote signaling alert assemblies 160, one of the remote signaling alert assemblies 160 being mated with the fuse assembly 14, and the other two of the remote signaling alert assemblies 160 being mated with the two protection elements 120, respectively.

The plurality of remote signaling alarm components 160 are disposed in the independent first isolation cavity 112, that is, the fuse component 14 and the corresponding remote signaling alarm component 160 are disposed in the same first isolation cavity 112, and the two protection elements 120 and the corresponding remote signaling alarm component 160 are disposed in the same first isolation cavity 112, so that the voltage withstanding characteristic of the surge protector 10 can be improved.

Each remote signaling warning component 160 is electrically connected to the centralized remote signaling connector 16, and any one of the remote signaling warning components 160 is triggered to transmit to the centralized remote signaling connector 16, and the centralized remote signaling connector 16 may be externally connected to a control system, a display system or an alarm system to timely notify the staff.

The remote signaling warning assembly 160 may be configured to trigger the corresponding remote signaling warning assembly 160 to notify personnel when the fuse assembly 14 or any of the cold welds fail, as described in detail below.

The triggering mode of the remote signaling alarm component 160 is not limited, and the remote signaling alarm component 160 is usually provided with a triggering part, which can be a button or a turning plate, etc., and the remote signaling alarm component 160 can be triggered by pressing the triggering part.

In this embodiment, the triggering manner of the remote signaling alarm component 160 corresponding to the fuse component 14 may be, but is not limited to, the following scheme: one end of the fuse assembly 14 is provided with a trigger assembly 140, the trigger assembly 140 comprising a retractable striker 141, the striker 141 being capable of extending and triggering a corresponding remote signaling alert assembly 160 when the fuse assembly 14 is blown.

Specifically, the triggering assembly 140 includes a striker 141 and a second spring, where the striker 141 is telescopically disposed at one end of the fuse assembly 14, and the second spring may be a compression spring or a tension spring, and both ends of the second spring are respectively connected to the striker 141 and the fuse assembly 14, so that the striker 141 has a tendency to protrude toward the triggering portion of the remote signaling alarm assembly 160. In addition, a limiting part may be disposed between the striker 141 and the fuse assembly 14, when the fuse assembly 14 fails without fusing, the limiting part fixes the striker 141, the striker 141 cannot extend, and at this time, if the second spring is a compression spring, the second spring is compressed; when the fuse assembly 14 is in fusing failure, the limiting part fails, and the firing pin 141 extends towards the triggering part under the pushing of the second spring, so that the remote signaling warning assembly 160 is triggered. The structure of the limiting portion and the linkage structure of the limiting portion and the fuse assembly 14 are not limited, as long as the limiting portion no longer limits the extension of the striker 141 when the fuse assembly 14 fuses and fails. For example, the limiting portion is connected to the melt and the striker 141, respectively, and when the melt melts, the limiting portion is separated from the melt, but the limiting portion can move along with the striker 141.

Of course, the trigger assembly 140 is just one implementation of enabling the striker 141 to extend, and in other embodiments, the striker 141 may extend and retract in other manners, for example, a solenoid valve may be disposed at one end of the fuse assembly 14, and the solenoid valve may be capable of controlling the extension or retraction of the striker 141.

In this embodiment, the remote signaling alarm assembly 160 is triggered by the arc shielding assembly 130, specifically, a trigger rod is disposed on the arc shielding slider 131, a trigger portion of the remote signaling alarm assembly 160 adopts a flap structure, that is, one end of the flap is in running fit with the remote signaling alarm assembly 160, when the remote signaling alarm assembly 160 rotates to a certain angle, the remote signaling alarm assembly 160 can be triggered, and along with the sliding of the arc shielding slider 131, the trigger rod can squeeze the trigger portion of the remote signaling alarm assembly 160, so that the remote signaling alarm assembly 160 is triggered. Of course, in other embodiments, other patterns of triggers are possible.

Furthermore, in some embodiments, the surge protector 10 may also be provided with a mechanical indicating assembly that can mechanically alert the operator.

Specifically, as shown in fig. 13-15, the mechanical indication assembly includes an observation hole 115, a first identification portion 133 and a second identification portion 134, the observation hole 115 is disposed on the housing 11, the first identification portion 133 is disposed on the surge protection module 12 such as the base 121, the second identification portion 134 is disposed on the arc shielding sliding block 131, the position of the first identification portion 133 is always kept unchanged, and the position of the second identification portion 134 can be changed along with the sliding of the arc shielding sliding block 131.

The first recognition portion 133 and the second recognition portion 134 are different in color, for example, the first recognition portion 133 is red, the second recognition portion 134 is green, and the like, and the first recognition portion 133 or the second recognition portion 134 can be made to face the observation hole 115 during the sliding of the arc shielding slider 131. Specifically, when the protection element 120 is not failed, the arc shielding slider 131 is kept still, the second recognition portion 134 shields the first recognition portion 133, the second recognition portion 134 is opposite to the observation hole 115, and the worker can only see the second recognition portion 134 from the observation hole 115; when the protection element 120 fails, the arc shielding slider 131 slides, the second recognition portion 134 is no longer opposed to the observation hole 115, the first recognition portion 133 is exposed, and the first recognition portion 133 is opposed to the observation hole 115, so that the worker can see the first recognition portion 133 from the observation hole 115. The worker can more intuitively determine whether the surge protection module 12 has failed and which protection element 120 has failed based on the color seen from the viewing aperture 115.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. The utility model provides a built-in fuse's surge protector, its characterized in that includes shell, surge protection module and fuse subassembly, be provided with two first isolation chamber in the shell, surge protection module with the fuse subassembly is located two respectively first isolation intracavity, surge protection module with the fuse subassembly distributes side by side and is connected in series each other.

2. The fused surge protector device of claim 1, further comprising a switch-like protection device, wherein said surge protection module, said switch-like protection device, and said fuse assembly are serially connected in sequence.

3. The fused surge protector device of claim 2 wherein said housing further comprises a second isolation chamber, said second isolation chamber being disposed independently adjacent one end of both said first isolation chambers, said switch-like protection device being located within said second isolation chamber.

4. The surge protector with built-in fuse according to claim 1, wherein a plurality of supporting division bars are arranged in the first isolation cavity, and the plurality of supporting division bars are arranged at intervals along the length direction of the first isolation cavity.

5. The fused surge protector of claim 1, further comprising a centralized remote signaling connector and at least two remote signaling alert assemblies, at least two of said remote signaling alert assemblies being respectively electrically connected to said centralized remote signaling connector, said fuse assemblies and said surge protection modules being respectively provided with remote signaling alert assemblies, said fuse assemblies or said surge protection modules being capable of triggering said respective remote signaling alert assemblies when said fuse assemblies or said surge protection modules fail; the fuse assembly and the corresponding remote signaling alarm assembly are located in the same first isolation cavity, and the surge protection module and the corresponding remote signaling alarm assembly are located in the same first isolation cavity.

6. The fused surge protector of claim 5 wherein said fuse assembly has an end provided with a trigger assembly, said trigger assembly comprising a retractable striker, said striker being capable of extending and triggering a corresponding said remote signaling warning assembly when said fuse assembly is fused.

7. The fused surge protector of claim 1 wherein said surge protection module comprises at least one protection element or at least two protection elements in series or at least two protection elements in parallel.

8. The surge protector with built-in fuse according to claim 7, wherein the surge protector module further comprises a base and an arc-shaped release spring piece, the middle part of the release spring piece is fixed on the base through a threaded fastener, the two protection elements are provided with low-temperature trip welding tables, and two ends of the release spring piece are welded with the two low-temperature trip welding tables through low-temperature solder respectively.

9. The fused surge protector of claim 8 further comprising an arc shielding assembly comprising an arc shielding slide slidably disposed in said housing and a first spring that causes said arc shielding slide to have a tendency to insert between said disengagement dome and said low temperature trip welding station.

10. The surge protector with built-in fuse according to claim 9, wherein the housing is provided with an observation hole, the surge protection module is provided with a first identification part with a fixed position, the arc shielding slide block is provided with a second identification part, the first identification part and the second identification part are different in color, and the first identification part or the second identification part can be made to face the observation hole in the sliding process of the arc shielding slide block.