CN217159274U - Multi-module SPD structure - Google Patents

Abstract

The utility model belongs to the technical field of lightning protection equipment, and discloses a multi-module SPD structure, which comprises a shell and a base, wherein at least two independent SPD units are accommodated in the shell; the SPD unit has an independent access end and a shared access end, and all the SPD units are abutted and fixed in the shell through the base. The utility model discloses a carry out the modularized design with a plurality of SPD units, have independent incoming end and the sharing connect the end, can directly the propelling movement install in to the casing to it is fixed to carry out the lock through the drain pan, then can realize the surge earial drainage protection of a plurality of branch roads through single module, also can change its inside SPD unit through the mode of dismantling the base simultaneously, have higher integrated level and adaptability.

Description

Multi-module SPD structure

Technical Field

The utility model belongs to the technical field of lightning protection electrical equipment, concretely relates to multimode SPD structure.

Background

SPD is an indispensable device in electronic equipment lightning protection, and functions to limit transient overvoltage entering a power line and a signal transmission line within a voltage range that the equipment or system can bear, or to discharge lightning current to the ground, thereby protecting the protected equipment or system from impact. And SPD has multiple structure and the form of setting, but the core component among most surge protector all has the condition of deterioration inefficacy, and when appearing damaging or deterioration inefficacy, the SPD structure that originally belongs to the broken circuit forms the short circuit, and electric current continuously leaks from SPD, leads to wherein core component temperature constantly to rise to produce fire hazard potential safety hazard.

In order to effectively avoid the above situations in time, the existing SPD equipment is provided with a thermal tripping mechanism which is used for breaking off in time to form an open circuit when the leakage current is generated to a certain temperature, thereby avoiding fire. The essence of thermal tripping is the tripping of an over-temperature protection action, and the over-temperature protection is the overload protection with the characteristics of time delay tripping and time delay return, and is an overload tripper which acts according to the thermal effect of current flowing through the tripper. This mechanism is generally operated to directly open the circuit, and does not affect other internal functional components. The existing SPD structures are independent structures, a plurality of SPD structures are arranged in a plug-and-socket mode, independent thermal tripping structures and feedback structures are provided, and an integrated SPD structure integrating a plurality of SPD units is lacked.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems existing in the prior art, the utility model provides a multimode SPD structure, this structure has the shell structure of integral type, connects a plurality of external circuits through set up a plurality of SPD units of a plurality of facilities side by side wherein, can realize the earial drainage protection of a plurality of circuits.

The utility model discloses the technical scheme who adopts does:

in a first aspect, the utility model discloses a multi-module SPD structure, which comprises a shell and a base, wherein at least two independent SPD units are accommodated in the shell;

the SPD unit is provided with an independent access end and a shared access end, and all the SPD units are abutted and fixed in the shell through the base.

In combination with the first aspect, the present invention provides a first embodiment of the first aspect, wherein the housing is provided with a status indication module, and the status indication module detects the status of the thermal trip mechanism disposed in each SPD unit.

With reference to the first implementation manner of the first aspect, the present invention provides a second implementation manner of the first aspect, wherein the state indicating module includes a state indicating sheet disposed in the housing, and the state indicating sheet is linked with a thermal trip mechanism in each SPD unit;

when the thermal tripping mechanism acts, the state indicating sheet acts simultaneously and changes the identification information which can be checked for indication.

Combine the second kind implementation mode of first aspect, the utility model provides a third kind implementation mode of first aspect, identification information is the sign of setting on the state indicator piece to be equipped with the window on the casing, look over the change of sign through the window.

In combination with the second embodiment of the first aspect, the present invention provides a fourth embodiment of the first aspect, wherein the state indication module includes a circuit board and a plurality of remote signaling switches disposed on the circuit board, and each remote signaling switch is linked with a corresponding thermal trip mechanism;

and a remote signaling terminal is arranged on the circuit board and is connected with the outside through the remote signaling terminal to receive and transmit data.

In combination with the fourth embodiment of the first aspect, the present invention provides the fifth embodiment of the first aspect, wherein the SPD unit comprises a support layer fastened to each other, a piezoresistor is arranged in the support layer, a connection terminal is arranged at the second connection end of the piezoresistor, and the first connection end of the piezoresistor is connected to a conductive insertion sheet arranged in the housing;

the thermal tripping mechanism is provided with a conductor, and the conductor is connected with the second connecting end of the piezoresistor and the wiring terminal respectively through a hot melting conductive structure to realize series connection.

With reference to the fifth implementation manner of the first aspect, the present invention provides a sixth implementation manner of the first aspect, wherein the thermal trip mechanism includes a push rod, a spring and a fastener, one end of the push rod is bent upward and faces the state indication sheet, and the other end of the push rod is connected to the spring;

the fastener enters from the opening at the bottom of the bracket layer and pushes the spring to compress the spring, and the spring always gives the pushing force for the push rod to push the state indicating sheet to act.

Combine the sixth implementation mode of first aspect, the utility model provides a seventh implementation mode of first aspect, the fastener has the fixture block, and the trompil department on support layer is equipped with the groove of dodging that holds the fixture block, makes the fixture block through dodging the groove and get into in the support layer and continue to rotate the fastener and make the fixture block support to realize spacingly at support layer inner wall through rotating the fastener.

Combine the fifth implementation mode of first aspect, the utility model provides an eighth implementation mode of first aspect, the push rod has the action end to be equipped with the remote signalling preforming in the casing, the action end catches on the remote signalling preforming all the time and drives the remote signalling preforming and promote the linkage of remote signalling switch when the push rod action.

Combine first aspect and first to eight kind implementation modes of first aspect, the utility model provides a ninth implementation mode of first aspect, still be equipped with independent lightning protection module in the casing, the lightning protection module includes the support layer by the base lock equally, be equipped with the lightning protection device in the support layer, this lightning protection device has independent incoming end and connects the output with other SPD unit sharing.

It is worth to be noted that the SPD structure is an integrated anti-surge device in which a plurality of piezoresistors are arranged in the same shell. The whole SPD structure is connected in series in a single bleeder circuit, the piezoresistors in the SPD structure are arranged in parallel, after a single piezoresistor fails, other piezoresistors can achieve the same effect, and piezoresistors of different types can be adopted according to requirements, so that the effect of multi-path failure protection is achieved.

However, if only one varistor fails, the circuit may have a hidden trouble that cannot be eliminated, and even if other varistors are kept in the state, a larger problem may occur. The push rod in this embodiment has a portion connected to the incoming/outgoing circuit of the single piezo-resistor by a thermally fused conductive structure for on/off feedback. The hot-melt conductive structure includes various types, but is generally a low-temperature soldering structure.

The connection mode includes various modes, namely the push rod is provided with a conductive part and only needs to be connected with any terminal of the piezoresistor through low-temperature soldering. Or the push rod does not have a conductive part per se, but has a bearing end face, and the hot-melt conductive structure is arranged on the bearing end face and is directly connected with the terminal of the piezoresistor.

However, in any of the above structures, when the corresponding varistor generates heat abnormally, the portion melts and loses the connection restriction effect. The push rod has a movement trend, and once the limit force is lost, the push rod can act in time and simultaneously push the state indicating sheet to act so as to change the state of the push rod due to the fact that the hot melting conductive structure is limited and cannot act. And the SPD structure is provided with an area which can display the corresponding state indicating sheet, and once the position or the state of the state indicating sheet is changed, the on-off condition of the internal circuit of the SPD structure can be easily checked from the outside.

Because the state indicating sheet is matched with all push rods, namely all the push rods can push the state indicating sheet to act when acting, the single piezoresistor can feed back outwards after failing, a worker can reach the site in time and replace the single or a plurality of piezoresistors in the SPD structure, and the SPD structure is reset for continuous use.

It should be noted that the pushing is used to refer to the linkage relationship between the pushing rod and the state indicating sheet, and those skilled in the art should understand that various direct or indirect force transmission modes are equivalent alternatives. Simultaneously, the state indication piece is not complete lamellar structure yet, have the state and indicate the function and can with all push rods cooperations can, occupy in order to reduce the space and then can adopt lamellar structure as far as possible to have the contact surface of broad and a plurality of push rod cooperations, still have thin characteristics simultaneously and do not occupy too much space.

In contrast to the prior art, the fastening element is an axial thrust device. The spring is gradually compressed or stretched as the fastener is driven in. And because the push rod is arranged on the conductor, the problem that the connection stability is influenced by the steep thrust increase caused by side installation can be avoided due to the continuously increased thrust.

The structure of this kind of quick installation, can directly take off the fastener when needing to be changed and then drag out the spring of inside can. If except that this kind of needs coating cooling fixed connected mode of hot melt, can directly take off the back with inside whole tripping device, change the installation in the trompil, then can change inside tripping device under the prerequisite of not taking apart whole casing, convenient operation.

(1) The utility model discloses a carry out the modularized design with a plurality of SPD units, have independent incoming end and the sharing connects the end, can directly push to install in the casing to carry out the lock through the drain pan and fix, then can realize the surge discharge protection of a plurality of branch roads through single module, also can change its inside SPD unit through the mode of dismantling the base simultaneously, have higher integrated level and adaptability;

(2) the utility model can change the state when any piezoresistor is abnormally heated and tripped by the integral state indicating sheet, thereby feeding back the circuit on-off condition in the whole SPD structure in time and ensuring the use safety of the SPD structure to the maximum extent;

(3) the utility model discloses a be provided with soft part, can arrange the spring and the push rod of certain length in narrow and small space, utilize two adjacent sides of piezo-resistor to have compacter inner structure design, and adopt standard length's spring to provide stronger dropout thrust simultaneously, make it in time promote its outwards pop out after hot melt conductive structure became invalid, thereby in time feed back this SPD inner circuit state

(4) The utility model discloses a fastener and the moving part that can dismantle fast can realize installing fast in the SPD unit, can enough realize compression or tensile process to having elastic moving part simultaneously in the installation, make it exert external force to the dropout part continuation increase that sets up in the SPD structure, avoid the external force of sudden increase to cause its connection position unstability to drop.

Drawings

Figure 1 is a first axial side view of the SPD structure of the present invention;

fig. 2 is a second axial side view of the SPD structure of the present invention;

FIG. 3 is a front view of the SPD structure of the present invention with the housing half-sectioned;

FIG. 4 is a first axial side view of the SPD structure of the present invention with the housing half-sectioned;

FIG. 5 is a top view of the SPD structure of the present invention with the housing half-sectioned;

FIG. 6 is a second axial view of the SPD structure of the present invention with the housing half-sectioned;

FIG. 7 is an elevation view of the present invention with the housing and base removed and the fastener installed;

FIG. 8 is a first isometric view of the present invention with the housing and base removed and the fastener installed;

FIG. 9 is a second axial side view of the present invention with the housing and base removed and the fastener installed;

fig. 10 is an enlarged partial schematic view of a in fig. 9 according to the present invention;

fig. 11 is a schematic diagram of the state after thermal trip in the SPD structure of the present invention;

fig. 12 is a top schematic view of the SPD structure after thermal trip;

fig. 13 is an isometric view of the SPD structure after thermal trip;

fig. 14 is a first isometric view of a single SPD unit of the present invention disposed on a top plate;

fig. 15 is a second axial view of a single SPD unit of the present invention disposed on the top plate;

fig. 16 is a bottom view of a single SPD unit of the present invention disposed on the top plate;

FIG. 17 is an isometric view of a single SPD unit of the present invention disposed on the top plate and with the fastener ejected;

fig. 18 is an enlarged schematic view of a portion B of fig. 17 according to the present invention;

fig. 19 is a front view of the thermal trip mechanism of the present invention in connection with a varistor;

fig. 20 is an isometric view of the thermal trip mechanism of the present invention in connection with a varistor;

figure 21 is a first exploded view of the SPD structure of the present invention;

figure 22 is a second exploded view of the SPD structure of the present invention.

In the figure: 1-shell, 2-wiring port, 3-window, 4-base, 5-support layer, 6-state indicating sheet, 7-push rod, 8-wiring terminal, 9-spring, 10-fastener, 10.1-fixture block, 10.2-cross groove, 10.3-stop block, 10.4-vertical rod, 11-piezoresistor, 12-circuit board, 13-remote signaling terminal, 14-conductive insert sheet, 15-top plate, 16-first connecting end, 17-remote signaling press sheet, 18-second connecting end and T-conductive block.

Detailed Description

The present invention will be further explained with reference to the drawings and the embodiments.

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of the application is used, the description is only for convenience and simplicity, and the indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present application. Furthermore, the appearances of the terms "first," "second," and the like in the description herein are only used for distinguishing between similar elements and are not intended to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like when used in the description of the present application do not require that the components be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should also be noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly and may include, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Example 1:

the present embodiment provides an SPD structure, as shown in fig. 1 to 22, which protects an external leakage circuit by arranging a plurality of piezoresistors 11 in parallel in a housing 1. The external structure of the SPD structure is shown in fig. 1 and 2, having a separate housing 1, with terminals 8 provided on the outside of the housing 1 for connection to external cables. And internal block diagrams are shown in fig. 21 and 22.

The bottom of the housing 1 of the SPD structure is provided with an opening, an internal module is inserted from the side opening, and the internal module is buckled and fixed through a base 4. The side surface of the shell 1 is provided with a plurality of access ends and an access end, and the access ends and the access end are provided with wiring terminals 8 which are pressed and fixed by bolts.

The internal structure of the SPD structure is shown in fig. 3-6 with the housing 1 of the SPD structure half-cut, and it can be seen that a plurality of layers of brackets 5 are secured to the base 4, with one varistor 11 in each layer of brackets 5. This support layer 5 is an independent functional area promptly, and the lateral wall sets up for the fretwork, and the inner structure can be looked over to the outside.

The two ends of the bracket layer 5 are provided with connecting terminals 8, a parallel branch formed by an air release tube or a lightning protection component is used in the bracket layer 5 at the outermost side in fig. 4, and the connecting end of the whole SPD structure is arranged at the connecting terminal 8 of the bracket layer 5.

Furthermore, three additional support layers 5 arranged side by side are arranged in the whole SPD structure, a piezoresistor 11 is arranged in each support layer 5, and a branch circuit is formed by the piezoresistors 11.

The tops of all the support layers 5 are covered by the same top plate 15, sliding grooves are formed in the top plate 15, and the state indicating sheets 6 are matched through the sliding grooves.

Here, the status indicator sheet 6 is a sheet structure having at least three outgoing ends in three channels of the chute, but not limited thereto.

The status indication sheet 6 has a panel on the other side, which is marked with a distinct logo, or painted with a bright color such as red, or covered with a clear pattern, so as to be displayed at the window 3 provided on the housing 1.

Here, the slide groove has a stop strip, and when the three outgoing end portions of the status indicator sheet 6 are inserted into the corresponding channels, the three outgoing end portions are continuously slid inward so as to abut against the stop strip, which is the initial status of the status indicator sheet 6.

The push rods 7, which are arranged in each carrier layer 5 with the varistor 11, have a projecting end which projects from the upper end of the sliding track on the carrier layer 5 side and is bent into the guide plate 15, aligned with the corresponding passage of the slide groove of the plate 15.

In this embodiment, the push rod 7 is an integrated structure, but not limited thereto, and the implementation manner of a multi-section structure or a linked multi-section structure is also included. The push rod 7 has two ends, wherein the end located inside the carrier layer 5 is connected to an internally provided spring 9, which is always urged in the upward direction in the figure by the spring 9.

And the other end part is a push head which is inserted into a channel of the sliding groove of the top plate 15 in a sliding way, the push rod 7 is pushed by the spring 9, and the push head pushes the state indicating sheet 6 on the top plate 15 to act.

Because the direction of the sliding groove is vertical to the stress direction of the push rod 7, a bendable bending part is arranged between the push rod 7 and the push head. The figure shows that the bending part is a push rod 7 part with a through groove at the center, the thickness of the push rod is reduced, and the middle part is hollow, so that the push rod has better bending performance compared with other parts of the push rod 7.

Meanwhile, the sliding rails of the support layer 5 and the sliding grooves of the top plate 15 are respectively provided with a limiting structure, the limiting structures are limited during installation, when the pushing head is pushed in the sliding rails from bottom to top, the pushing head automatically turns to the inside of the sliding groove channel of the top plate 15, and when the spring 9 pushes the pushing head to continue to act, the deformation of the bending part of the pushing head is limited by the limiting structures.

It should be noted that, by selecting the material type, the material of the push rod 7 itself does not have the amount of compression deformation in the length direction, and although the bending part can be bent to both sides, when the bending part is limited, the push rod can directly transmit the pushing force to the push head after receiving the pushing force in the length direction.

Furthermore, the middle part of the push rod 7 is provided with a conductive block T, and the conductive block T can be made of metal or nonmetal materials and is fixed on the push rod 7 by embedding or bonding.

In the carrier layer 5, the varistor 11 has a first connection 16 and a second connection 18. Wherein the second connecting end 18 is adjacent to the terminal 8 of the corresponding carrier layer 5 and the push rod 7 is between the two structures. In the initial state, the gap between the two sides of the push rod 7 is small, so that the conductive block T is just positioned between the second connecting end 18 and the metal part of the connecting terminal 8. And the three structures are connected and fixed by using a low-temperature soldering process so as to form a passage.

And the second connecting terminal 18 passes through the support layer 5 and is connected with the conductive insert 14 arranged on the upper part of the base 4. As shown in fig. 7, it can be seen that the conductive insert 14 has a plurality of sockets, and the second connection terminal 18 of each varistor 11 is inserted into the corresponding socket to achieve electrical connection and is uniformly connected out through the connection terminal 8 disposed in the outermost support layer 5.

It can be stated that in the initial position, as shown in fig. 11 and 12, both the varistor 11 and the connection terminal 8 are fixed in the respective carrier layer 5. Two black frame portions in fig. 11 are low-temperature soldering connection portions between the conductive block T of the push rod 7 and the metal conductors on the two sides, and the push rod 7 is fixed due to the low-temperature soldering structure, at this time, the spring 9 is in a compressed state, and the panel with an obvious mark cannot be seen in the window 3 of the housing 1, which indicates that the SPD structure is in a normal working state at this time.

Once the piezoresistor 11 is degraded or failed in the process of leakage, a power frequency current continuously flows into a certain access end, and the piezoresistor 11 in the corresponding support layer 5 continuously generates heat, so that a hot-melting conductive structure (namely, a low-temperature soldering structure) on the push rod 7 at the corresponding position is melted. At this time, the compressed spring 9 can immediately push the push rod 7 to move upwards, and the upper part of the push rod in a horizontal state pushes the state indicator sheet 6 to act, so that a clear mark appears in the window 3, and a worker can judge that the failed piezoresistor 11 exists in the SPD structure according to the mark.

Further, the present embodiment provides another feedback mechanism. A circuit board 12 is provided on the base 4, the circuit board 12 extending horizontally on the bottom surface by a length sufficient to cover the lower portion of each of the rack layers 5. And a remote signaling switch is arranged on the circuit board 12 corresponding to each bracket layer 5, the top of the remote signaling switch is provided with a movable end part, and a remote signaling pressing sheet 17 is arranged on the movable end part.

A convex actuating end is also provided at the lower part of the push rod 7, and one end of the remote signaling pressing sheet 17 extends into the bracket layer 5 and abuts against the actuating end. As shown in fig. 11, the remote signaling pad 17 is held against the remote signaling switch at one end and has a through slot in the middle for the movable end of the remote signaling switch to pass through and an enlarged end stop at the end where it passes through.

The end of the remote signaling pressing sheet 17 is abutted against the action end, and is limited by the action end to keep the inclined state all the time. Once the push rod 7 acts, the action end can drive the remote signaling pressing sheet 17 upwards to rotate by the abutting end of the remote signaling switch, so that the movable end of the remote signaling switch is driven to move outwards, and the signal of an internal circuit is changed to achieve the feedback effect.

The circuit board 12 can collect relevant current changes in real time, the circuit board is communicated with an external circuit through a remote signaling terminal 13 arranged on the outermost side, a rear-end monitoring system can receive signals in real time through circuit feedback to warn, and maintenance personnel can judge which SPD structure fails and replace the SPD structure according to the state indicator sheet 6 after the circuit board reaches the site.

Further, in the present embodiment, for convenience of installation, an opening is formed at a lower portion of each of the rack layers 5, and the opening corresponds to the sliding track of the push rod 7. A cylindrical fastener 10 is fitted to the opening, and fig. 15 and 16 show the internal structure with the base 4 and the housing 1 removed.

Specifically, when the device is installed, other components such as the piezoresistor 11 and the like are installed in place, then the push rod 7 is installed in the shell 1, and the conductor is fixedly connected with the end parts at two sides through low-temperature soldering. After the stability, the shell 1 is buckled, the bottom of the shell 1 is provided with an opening corresponding to the push rod 7, at the moment, the spring 9 and the fastener 10 are sequentially inserted into the opening, and the push rod 7 is always pushed upwards by the spring 9 through the extrusion and locking of the fastener 10, so that the tripping tendency is kept.

Furthermore, one end of the fastener 10 is a vertical rod 10.4, and is connected with the spring 9 through the vertical rod 10.4 for limiting. And a fixture block 10.1 is arranged on the outer wall of the fastener 10, the fixture block 10.1 is provided with an arc-shaped surface and a plane, the arc-shaped surface is an insertion end surface, and the lower end is a plane and can abut against the inner wall of the opening.

The casing 1 of the whole SPD unit is formed by mutually buckling two parts, and an avoiding groove communicated with the opening at the other side is also arranged on the opening formed at the bottom of the casing during buckling. The overall cross-sectional dimension of the fastener 10 is close to the dimension of the opening, as the latch 10.1 is arranged to block the entrance into the opening. The avoiding groove can just accommodate the fixture block 10.1, so that the fastener 10 can smoothly penetrate into the opening after the fixture block 10.1 is aligned with the avoiding groove by rotation.

After the fixture block 10.1 is completely sunk into the opening, the fastener 10 is rotated to enable the fixture block 10.1 to be pushed against the inner wall of the shell 1 by the spring 9, and therefore clamping and fixing are achieved.

Further, a stop block 10.3 is further arranged at the end of the outer side of the fastener 10, the volume of the stop block 10.3 is larger than the size of the whole avoiding groove, and when the stop block 10.3 is completely sunk into the opening, the stop block 10.3 abuts against the outside of the shell 1, so that the fastener 10 cannot be completely sunk into the opening, and transitional insertion is avoided.

Furthermore, a sunken groove is formed in the end face of the tail portion of the fastening piece 10, a cross groove 10.2 is formed in the sunken groove, and a cross tool can extend into the sunken groove and be inserted into the cross groove 10.2 to achieve clamping. Rotation of the fastener 10 by the cross tool allows for easier installation or removal.

Alternatively, the fastener 10 may be secured by a threaded engagement. The outer surface of the fastener 10 is provided with external threads, the fastener 10 is screwed to realize thread limiting with the opening, the stop block 10.3 is used for preventing the fastener from completely sinking into the opening and being incapable of falling out, and the same effect can be achieved.

The present invention is not limited to the above-mentioned alternative embodiments, and various other products can be obtained by anyone under the teaching of the present invention. The above detailed description should not be taken as limiting the scope of the invention, which is defined in the following claims, and which can be used to interpret the claims.

Claims (10)

1. A multi-module SPD architecture, comprising: the SPD device comprises a shell (1) and a base (4), wherein at least two independent SPD units are accommodated in the shell (1);

the SPD units are provided with independent access ends and shared access ends, and all the SPD units are abutted and fixed in the shell (1) through the base (4).

2. The multi-module SPD structure according to claim 1, wherein: and a state indicating module is arranged on the shell (1), and the state of a thermal tripping mechanism arranged in each SPD unit is detected through the state indicating module.

3. A multi-module SPD architecture according to claim 2, characterized in that: the state indicating module comprises a state indicating sheet (6) arranged in the shell (1), and the state indicating sheet (6) is linked with a thermal tripping mechanism in each SPD unit;

when the thermal tripping mechanism acts, the state indicating sheet (6) acts simultaneously and changes the viewable identification information to indicate.

4. A multi-module SPD architecture according to claim 3, characterized in that: the identification information is an identification arranged on the state indicating sheet (6), a window (3) is arranged on the shell (1), and the change of the identification is checked through the window (3).

5. A multi-module SPD structure according to claim 3, wherein: the state indicating module comprises a circuit board (12) and a plurality of remote signaling switches arranged on the circuit board (12), and each remote signaling switch is linked with a corresponding thermal tripping mechanism;

the circuit board (12) is provided with a remote signaling terminal (13) which is connected with the outside for data transmission and reception through the remote signaling terminal (13).

6. A multi-module SPD structure according to claim 5, characterized in that: the SPD unit comprises support layers (5) which are buckled with each other, a piezoresistor (11) is arranged in each support layer (5), a connecting terminal (8) is arranged at a second connecting end (18) of the piezoresistor (11), and a first connecting end (16) of the piezoresistor (11) is connected with a conductive inserting sheet (14) arranged in the shell (1);

the thermal tripping mechanism is provided with a conductor, and the conductor is connected with the second connecting end (18) of the piezoresistor (11) and the wiring terminal (8) respectively through a hot melting conductive structure to realize series connection.

7. The multi-module SPD structure of claim 6, wherein: the thermal tripping mechanism comprises a push rod (7), a spring (9) and a fastener (10), one end of the push rod (7) is bent upwards and faces the state indicating sheet (6), and the other end of the push rod is connected with the spring (9);

the fastener (10) enters from the opening at the bottom of the bracket layer (5) and pushes the spring (9) to compress the spring, and the spring (9) always provides the pushing force for the push rod (7) to push the state indicating sheet (6) to act.

8. The multi-module SPD structure according to claim 7, wherein: the fastener (10) is provided with a clamping block (10.1), an avoiding groove for accommodating the clamping block (10.1) is formed in the opening of the bracket layer (5), the clamping block (10.1) enters the bracket layer (5) through the avoiding groove by rotating the fastener (10), and the fastener (10) continues to rotate so that the clamping block (10.1) abuts against the inner wall of the bracket layer (5) to realize limiting.

9. The multi-module SPD structure according to claim 7, wherein: the push rod (7) is provided with an action end, a remote signaling pressing sheet (17) is arranged in the shell (1), the action end always hooks the remote signaling pressing sheet (17) and drives the remote signaling pressing sheet (17) to push the remote signaling switch to be linked when the push rod (7) acts.

10. A multi-module SPD structure according to any one of claims 1-8, characterized in that: an independent lightning protection module is further arranged in the shell (1), the lightning protection module comprises a support layer (5) which is also buckled by the base (4), a lightning protection device is arranged in the support layer (5), and the lightning protection device is provided with an independent access end and an access end shared by other SPD units.

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