Multi-pulse surge protector

Abstract

The invention relates to the technical field of lightning protection equipment, in particular to a multi-pulse surge protector which comprises at least two protection modules arranged in parallel, one protection module is used for being connected with a live wire of a power supply, and the other protection modules are used for being connected with a zero wire. Each protection module comprises at least two stages of protection units which are arranged in parallel, each stage of protection unit comprises a series branch formed by a surge protection element and a backup protection element, the protection module further comprises a fault indication unit, the fault indication unit comprises an indication lamp, and the indication lamp is connected with each stage of protection unit in parallel. According to the surge protector, a user is reminded to replace the whole protection module, so that the user can quickly position and process a fault point, the maintainability and the operation convenience of the surge protector are greatly improved, and the downtime of the system is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of lightning protection equipment, in particular to a multi-pulse surge protector. BACKGROUND

[0002] The surge protector, also known as surge protector or overvoltage protector, is commonly known as "surge" or "lightning protector". It is an electronic device that provides safety protection for various electronic devices, instruments, communication lines. The core function of the surge protector is: when the electrical circuit or communication line suddenly generates peak current or overvoltage due to external interference (such as lightning, power grid switching operation, etc.), the surge protector can conduct in a very short time (nanosecond level) Diversion, the huge energy is discharged into the ground, so as to avoid the damage of the subsequent equipment.

[0003] Because a lightning strike from a cloud to the ground is usually not a single discharge, but a series of subsequent lightning strikes within a very short time (within a few tenths of a second). Under the real multiple lightning strikes, a conventional single-pulse surge protector may be damaged due to the accumulated heat and mechanical stress after the first lightning strike, and the second and third lightning strikes.

[0004] In order to solve the above problems, there are multi-pulse surge protectors on the market. The multi-pulse surge protector is an SPD specially designed and tested to withstand and safely discharge such continuous multiple lightning current pulses. Its core goal is: in a complete lightning event, even if it is subjected to a series of lightning current impacts, it can remain undamaged and continue to provide protection.

[0005] In related technologies, the multi-pulse surge protector includes a live wire branch and a zero line branch. The live wire branch is provided with multiple levels of parallel protection units. Each level of protection unit includes a series branch formed by a surge protection element (such as a pressure sensitive resistor) and a backup protection element (such as a fuse). The protection unit also includes an indication structure for indicating whether the level of protection unit is failed. In actual use, the user needs to observe the indication structure in each level of protection unit to determine whether the level of protection unit is failed, and further determine whether the entire protection module is failed. Such a judgment method is not intuitive enough, which affects the efficiency. SUMMARY

[0006] In order to improve the observation convenience of the failure condition of each protection module of the multi-pulse surge protector, the present application provides a multi-pulse surge protector.

[0007] The multi-pulse surge protector provided by the present application adopts the following technical scheme: The application discloses a multi-pulse surge protector, comprising at least two protection modules arranged in parallel, wherein one of the protection modules is used for connecting a live wire of a power supply, and the rest of the protection modules are used for connecting zero lines; each of the protection modules comprises at least two protection units arranged in parallel; each of the protection units comprises a series branch formed by a surge protection element and a backup protection element; and the protection module further comprises a fault indication unit, wherein the fault indication unit comprises an indicator lamp which is connected in parallel with each of the protection units.

[0008] By adopting the above technical scheme, the fault indication unit is integrated in each protection module, and the indicator lamp is connected in parallel with each of the protection units, so that real-time visual monitoring of the working state of the protection units is realized. When all the backup protection elements in each of the protection units are fused, the indicator lamp starts to light up; when the circuit is normally working, each of the backup protection elements is kept in a conduction state, at this time, the voltage across the indicator lamp is close to zero or is short-circuited by a bypass device, so the indicator lamp does not emit light; when the backup protection element is fused due to overload or short circuit, the originally short-circuited indicator lamp circuit is activated, visual indication is realized, and the user is reminded to replace the entire protection module, so that the user can quickly locate and handle the fault point, the maintainability and operation convenience of the surge protector are greatly improved, and the system downtime is reduced.

[0009] Optionally, the protection module further comprises a ground wire terminal block and a ground wire connecting piece which are electrically connected, the ground wire terminal block is used for connecting a ground wire, the ground wire connecting piece comprises at least two connecting portions which are connected in series with the protection units respectively, the ground wire connecting piece is provided with a stamping hole, the hole wall of the stamping hole is connected with a limiting piece, the ground wire terminal block is provided with a through hole through which the limiting piece passes, and the limiting piece abuts against the surface of the ground wire terminal block away from the ground wire connecting piece.

[0010] By adopting the above technical scheme, the reliable series connection between the ground wire connection and the protection units is ensured by the electrical connection design of the ground wire terminal block and the ground wire connecting piece, and the matching structure of the stamping hole, the limiting piece and the through hole, and the parallel connection of the protection units is realized. In the actual processing process, the limiting piece is formed by stamping, and the limiting piece is abutted against the surface of the ground wire terminal block by stamping. The mechanical connection mode enhances the stability and safety of the ground wire circuit, prevents the connection from loosening due to vibration or external force, and thus ensures the effective discharge path of the surge current and improves the overall protection performance of the protector.

[0011] Optionally, the protection unit comprises at least two line outlet connecting plates which are electrically connected with different surge protection elements respectively, and the connecting portion comprises a bending segment and a guiding segment which are connected, the bending segment and the guiding segment are both arranged in an inclined manner and have opposite inclined directions, the guiding segment is used for slidingly abutting against the line outlet connecting plate, and the line outlet connecting plate abuts against the connection position of the bending segment and the guiding segment.

[0012] By adopting the technical scheme, the smooth sliding contact and the close connection between the protection unit and the ground wire connecting part are realized through the inclined design of the bending section and the guiding section in the ground wire connecting part. This structure not only simplifies the installation process and facilitates the plugging of the outlet connecting plate, but also improves the conductivity and mechanical strength of the electrical connection, reduces the contact resistance and the risk of heat accumulation, and further optimizes the performance of the surge protection element.

[0013] Optionally, at least one module connecting piece is further included, the protection module further includes a shell, the protection unit is arranged on the shell, a placement groove is formed on the shell, and two ends of the module connecting piece are respectively arranged in the placement grooves of adjacent shells. The module connecting piece is detachably connected with the shell.

[0014] By adopting the technical scheme, the flexible and convenient assembly and disassembly of multiple protection modules are realized through the detachable connection design of the module connecting piece and the placement groove on the shell. This modular structure adapts to the needs of different application scenarios, facilitates the expansion or replacement of the protection module, and improves the overall configurability and maintenance efficiency of the surge protection system.

[0015] Optionally, at least one connecting buckle is further included, a clamping groove is formed on the shell, and two ends of the connecting buckle are respectively clamped and fixed with the clamping grooves of adjacent shells. The clamping groove and the placement groove are respectively formed on the two end portions of the shell.

[0016] By adopting the technical scheme, an additional mechanical fixing mode is provided through the cooperation of the connecting buckle and the clamping groove of the shell, and the connection strength between adjacent protection modules is enhanced. In combination with the placement groove structure, this design ensures the firmness and stability of the module assembly, prevents accidental disconnection during use, and improves the structural reliability and installation flexibility of the surge protector.

[0017] Optionally, at least one module parallel piece is further included, the protection module further includes a ground wire connecting plate, the ground wire connecting plate is used for connecting the ground wire, the ground wire connecting plate is connected in series with each protection unit, two ends of the module parallel piece are respectively electrically connected with the ground wire connecting plates of adjacent protection modules, and the module parallel piece is detachably connected with the ground wire connecting plate.

[0018] By adopting the technical scheme, the electrical connection between the ground wire connecting plates of adjacent protection modules is realized through the module parallel piece, a unified ground wire discharge loop is formed, and the parallel connection of each protection module is realized. This detachable parallel design not only ensures the balanced shunt of the surge current among multiple modules, but also facilitates the independent maintenance or replacement of a single module, thereby improving the modularity and overall maintenance convenience of the system.

[0019] Optionally, the protection module further comprises a shell, the protection unit, the ground wire terminal block and the module parallel piece are arranged on the shell, a pressing piece is slidingly arranged on the shell, a pressing elastic piece is connected between the pressing piece and the shell to slide the pressing piece to press the module parallel piece on the ground wire terminal block, a clamping block is arranged on the pressing piece, a clamping groove is arranged on the module parallel piece for inserting the clamping block, a guide surface is formed on the surface of the module parallel piece and is arranged obliquely, and the guide surface is used to slidingly abut against the pressing piece to drive the pressing piece to slide away from the ground wire terminal block.

[0020] By adopting the above technical scheme, when the module parallel piece is installed, the module parallel piece abuts against the guide surface to drive the pressing piece to slide away from the ground wire terminal block, so that the end of the module parallel piece slides between the pressing piece and the ground wire terminal block, until the module parallel piece slides to align the clamping block with the clamping groove, the pressing piece slides to insert the clamping block into the clamping groove under the elastic force of the pressing elastic piece, and the pressing piece presses the module parallel piece on the ground wire terminal block. Through the cooperation of the pressing piece, the pressing elastic piece, the clamping block and the clamping groove, an automatic pressing and locking mechanism is provided to ensure that the module parallel piece and the ground wire terminal block always maintain close contact. The design of the guide surface makes the installation process smoother, and the pressing elastic piece continuously applies pressure to prevent the connection from loosening, thereby significantly improving the stability and safety of the electrical connection.

[0021] Optionally, the shell is provided with an accommodating hole penetrating through the shell for inserting and passing out the module parallel piece, the shell is further provided with two unlocking pieces, the two unlocking pieces are respectively used to block the accommodating holes of the shell on both sides in the arrangement direction, the shell is provided with an unlocking groove in communication with the accommodating holes, the pressing piece is slidingly arranged in the unlocking groove, the unlocking groove is used for inserting the unlocking piece, a transmission piece is rotatably arranged in the unlocking groove, the rotation axis of the transmission piece extends in a direction perpendicular to the sliding direction of the pressing piece, the two ends of the transmission piece are respectively an abutting portion and a transmission portion, the unlocking piece is used to abut and push the abutting portion, the transmission portion is used to abut and push the pressing piece to slide away from the module parallel piece, and a reset elastic piece is connected between the transmission piece and the shell to rotate the transmission portion away from the pressing piece.

[0022] By adopting the technical scheme, when the multi-pulse surge protector is normally working, the unlocking piece blocks the containing hole, and plays the roles of insulation, dust prevention, etc., when maintenance or replacement of the internal structure of the multi-pulse surge protector is needed, the unlocking piece is detached from the containing hole, the unlocking piece is inserted into the unlocking slot, the end of the unlocking piece abuts against the pushing abutment portion, the transmission piece is driven to rotate, the transmission portion abuts against the pushing compression piece, the pushing compression piece is slid to be separated from the module parallel piece, at this time, the module parallel piece is not compressed, and the clamping block exits the clamping slot, at this time, the adjacent protection modules can be separated. Through the combination of the unlocking piece, the transmission piece and the reset elastic piece, a quick and safe unlocking mechanism is realized, which is used for releasing the module parallel piece. When the unlocking piece is inserted, the pushing compression piece is separated through the transmission piece, which is convenient for dismounting operation, and this design simplifies the maintenance process, and improves the convenience of user operation and the safety of the equipment.

[0023] Optionally, a limiting slot for inserting and rotating the end of the unlocking piece is formed in the slot wall of the unlocking slot, the slot wall of the limiting slot is used for abutting against the end of the unlocking piece, and the transmission piece is rotatably arranged in the limiting slot. An inclined sliding surface is formed on the abutment portion, and the end of the unlocking piece is used for slidingly abutting against the sliding surface to drive the transmission piece to rotate.

[0024] By adopting the technical scheme, when the unlocking piece is inserted into the unlocking slot to a certain depth, the unlocking piece is rotated, the end of the unlocking piece slidingly abuts against the sliding surface, the transmission piece is driven to rotate and push the pushing compression piece to slide away from the module parallel piece until the end of the unlocking piece abuts against the slot wall of the limiting slot, at this time, the unlocking piece will not be detached from the unlocking slot when the hands of the user are released. Through the refined design of the limiting slot and the sliding surface, the accuracy and smoothness of the unlocking process are further optimized. The limiting slot guides the correct insertion and rotation of the unlocking piece, and the sliding surface reduces the friction loss, so that the transmission piece can reliably act, thereby prolonging the service life of the unlocking mechanism and improving the durability of the surge protector under frequent maintenance.

[0025] In summary, the present application has at least one of the following beneficial technical effects: 1. The user is reminded to replace the entire protection module, which facilitates the user to quickly locate and process the fault point, greatly improves the maintainability and operation convenience of the surge protector, and reduces the system downtime. 2. Through the cooperation of the pushing compression piece, the compression elastic piece and the clamping block and the clamping slot, an automatic compression and locking mechanism is provided, which ensures that the module parallel piece and the ground terminal block always maintain close contact. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 FIG. 1 is a structural schematic diagram of Embodiment 1 of the present application.

[0027] Figure 2is a schematic view of the internal structure of the protection module in Embodiment 1 of the present application.

[0028] Figure 3 is a schematic view of the structure of the ground wire connecting piece in Embodiment 1 of the present application.

[0029] Figure 4 is a side view of the highlight fault indication unit in Embodiment 1 of the present application.

[0030] Figure 5 is a schematic view of the structure of the module parallel connecting piece in Embodiment 1 of the present application.

[0031] Figure 6 is a schematic view of the structure of the protection module of the module connecting piece in Embodiment 1 of the present application.

[0032] Figure 7 is a schematic view of Embodiment 2 of the present application.

[0033] Figure 8 is a partial sectional view of Embodiment 2 of the present application along the arrangement direction of the protection modules.

[0034] Figure 9 is a partial schematic view of the hidden casing of Embodiment 2 of the present application.

[0035] Figure 10 is Figure 9 the enlarged view at A in FIG. 1.

[0036] BRIEF DESCRIPTION OF THE DRAWINGS 1. protection module; 11. protection unit; 111. surge protection element; 112. backup protection element; 113. outgoing line connecting plate; 12. fault indication unit; 121. indicator lamp; 13. ground wire connecting plate; 131. perforation; 14. ground wire connecting piece; 141. connecting portion; 142. punched hole; 143. limiting piece; 15. casing; 151. placement groove; 152. clamping groove; 153. accommodating hole; 154. unlocking groove; 155. limiting groove; 2. module connecting piece; 3. connecting buckle; 4. module parallel connecting piece; 41. clamping groove; 42. guide surface; 5. pressing piece; 51. clamping block; 6. pressing elastic piece; 7. unlocking piece; 8. transmission piece; 81. abutting portion; 811. sliding surface; 82. transmission portion; 9. reset elastic piece. DETAILED DESCRIPTION

[0037] The present application will be further described below. Figures 1-10 The present application will be further described below.

[0038] Embodiment 1 Embodiment 1 of the present application discloses a multi-pulse surge protector. Referring to Figure 1 and Figure 2, the multi-pulse surge protector comprises at least two protection modules 1 connected in parallel, one of which is used for connecting the live wire of the power supply, and the rest are used for connecting the zero line. Each protection module 1 comprises at least two protection units 11 connected in parallel, each protection unit 11 comprises a series branch formed by a surge protection element 111 and a backup protection element 112, and the corresponding parameter values of the backup protection elements 112 in each protection unit 11 are sequentially increased.

[0039] Through the above arrangement, each protection module 1 can protect the live wire and the zero line respectively, and the multi-stage parallel protection units 11 can respond to lightning pulses in stages, and the design of the increasing parameter values of the backup protection elements 112 can make the surge protector better cope with lightning of different intensities, avoid the problem of premature failure of the traditional single-parameter backup protection element 112 under multiple surge impacts, improve the tolerance to multi-pulse surges and the overall reliability, prolong the service life of the equipment, and reduce the cost.

[0040] Referring to Figure 1 In the embodiment, four protection modules 1 are provided, i.e., the present application is a 4P multi-pulse surge protector.

[0041] Referring to Figure 2 In the embodiment, the protection unit 11 is provided with three levels, and the three backup protection elements 112 have a unified incoming line. The backup protection elements 112 of each level are electrically connected to different surge protection elements 111 through a wiring board, and the surge protection elements 111 of each level are connected to a unified ground wire, so as to realize the series connection of the three protection units 11. When the surge current passes through, it is first discharged through the surge protection element 111, and if the surge current is too large, the backup protection element 112 will act to cut off the circuit to prevent damage to the surge protection element 111.

[0042] Referring to Figure 2 The surge protection element 111 is a pressure-sensitive resistor, such as a zinc oxide pressure-sensitive resistor, which has a non-linear voltage-current characteristic and presents a high resistance state under normal voltage. When a surge voltage is encountered, the resistance of the surge protection element 111 rapidly decreases to discharge the surge current, thereby playing a protection role. Of course, the surge protection element 111 can also be a gas discharge tube, which utilizes the principle of gas discharge to ionize and conduct under the action of a surge voltage to discharge the surge current.

[0043] Referring to Figure 2 The backup protection element 112 is a fuse, which will melt and cut off the circuit when the current in the circuit is too large to protect other elements. The backup protection element 112 can also be a circuit breaker, which can automatically cut off the circuit when an overload, short circuit or other fault occurs in the circuit. The amperages of the three backup protection elements 112 are sequentially increased, which are low-amperage fuses, medium-amperage fuses and high-amperage fuses.

[0044] Referring toFigure 2 With Figure 3 The protection unit 11 includes three outlet connecting plates 113 respectively electrically connected with different surge protection elements 111. The protection module 1 further includes a ground wire connecting piece 14, which includes three connecting portions 141. Each connecting portion 141 includes a connecting bent section and a guiding section, both of which are obliquely arranged and oppositely inclined, so that the connecting position of the bent section and the guiding section protrudes towards the outlet connecting plate 113. The guiding section is used to slide against the outlet connecting plate 113, so that the outlet connecting plate 113 can be smoothly slid along the guiding section to the connecting position of the bent section and the guiding section during installation, and the outlet connecting plate 113 is in contact with the connecting position of the bent section and the guiding section. Such a design facilitates the plugging of the outlet connecting plate 113 and achieves close contact with the connecting portion 141, thereby improving the stability of the electrical connection.

[0045] Referring to Figure 2 With Figure 3 The protection module 1 further includes a ground wire terminal plate 13 electrically connected with the ground wire connecting piece 14, which is used to connect the ground wire. The ground wire connecting piece 14 is provided with a punched hole 142, and the hole wall of the punched hole 142 is connected with a limiting piece 143. The ground wire terminal plate 13 is provided with a through hole 131 through which the limiting piece 143 passes, and the limiting piece 143 is in contact with the surface of the ground wire terminal plate 13 away from the ground wire connecting piece 14. In the actual processing process, the limiting piece 143 is directly formed on the ground wire connecting piece 14 by punching, and the punched hole 142 is also formed at the same time. The limiting piece 143 is then in contact with the surface of the ground wire terminal plate 13 by punching, achieving stable electrical connection and preventing disconnection. The ground wire terminal plate 13 is usually made of metal with good electrical conductivity, such as copper or aluminum. Its function is to introduce the surge current into the ground wire.

[0046] Referring to Figure 1 With Figure 4 The protection module 1 further includes a fault indication unit 12, which includes an indicating lamp 121. One end of the indicating lamp 121 is connected with the incoming wire end of the backup protection element 112, and the other end is connected with the outgoing wire end of each backup protection element 112, so that the indicating lamp 121 is connected in parallel with each protection unit 11. The indicating lamp 121 can be a light-emitting diode, which has the advantages of low power consumption, long service life and high luminous efficiency.

[0047] When all the backup protection elements 112 in each protection unit 11 are fused, the indicating lamp 121 starts to light, reminding the user to replace the entire protection module 1. When the circuit is working normally, each backup protection element 112 remains in a conducting state, and at this time the voltage across the indicating lamp 121 is close to zero or is short-circuited by a bypass device, so the indicating lamp 121 will not emit light. When the backup protection element 112 is fused due to overload or short circuit, the originally short-circuited indicating lamp 121 circuit is activated, achieving visual indication.

[0048] Referring to Figure 5 The multi-pulse surge protector further comprises three module parallel pieces 4, two ends of each module parallel piece 4 are electrically connected with the ground terminal blocks 13 of the adjacent protection modules 1 respectively. The module parallel pieces 4 are detachably connected with the ground terminal blocks 13. The module parallel pieces 4 can be metal strips, which are detachably connected with the ground terminal blocks 13 of the adjacent protection modules 1 by bolt connection in the embodiment, so as to realize the parallel connection of the protection modules 1, form a unified ground discharge loop, and ensure the balanced shunt of the surge current among the multiple modules. In other embodiments, the module parallel pieces 4 can be detachably connected with the ground terminal blocks 13 of the adjacent protection modules 1 by plugging and the like.

[0049] Referring to Figure 2 With Figure 4 With Figure 5 The protection module 1 further comprises a shell 15, and the protection unit 11, the ground terminal block 13, the ground connecting piece 14 and the module parallel piece 4 are fixedly installed on the shell 15. The shell 15 can be made of plastic or metal, and serves to protect the internal components. The protection unit 11 has an outer shell. The shell 15 is provided with an accommodation hole 153 through which the module parallel piece 4 is inserted and passed out, and two ends of each module parallel piece 4 are inserted into the accommodation holes 153 of the two adjacent shells 15 respectively. The shell 15 is further provided with two blocking pieces which are buckled to block the accommodation holes 153 of the shells 15 on both sides in the arrangement direction. The ground terminal block 13 and the ground connecting piece 14 are hidden inside the shell 15.

[0050] Referring to Figure 6 The multi-pulse surge protector further comprises three groups of module connecting pieces 2, and the number of each group of module connecting pieces 2 is at least two. The shell 15 is provided with a placing groove 151 corresponding to each module connecting piece 2, and two ends of the module connecting piece 2 are placed in the placing grooves 151 of the adjacent shells 15 respectively. The module connecting piece 2 is detachably connected with the shell 15. The shape of the placing groove 151 is matched with the two ends of the module connecting piece 2, and the module connecting piece 2 can be a metal plate or a plastic plate, which is detachably connected with the shell 15 by bolt connection, so as to facilitate the assembly and disassembly of the multiple protection modules 1.

[0051] Referring to Figure 1 With Figure 6The multi-pulse surge protector also includes three sets of connecting clips 3, with at least two clips in each set. The housing 15 has corresponding snap-fit ​​grooves 152 on each connecting clip 3, and both ends of the connecting clip 3 are snapped into and fixed to the snap-fit ​​grooves 152 of adjacent housings 15. The snap-fit ​​grooves 152 and placement grooves 151 are respectively located at two ends of the housing 15. The connecting clips 3 can be plastic or metal clips, and their ends are elastic, allowing for a tight snap-fit ​​with the snap-fit ​​grooves 152, enhancing the connection strength between adjacent protection modules 1 and preventing accidental disconnection during use.

[0052] The assembly principle of a multi-pulse surge protector according to Embodiment 1 of this application is as follows: First, the surge protection element 111 and the backup protection element 112 are installed on the housing 15 and the electrical connection is completed. Then, the module parallel component 4 is installed on the housing 15. Finally, the module connector 2 and the connecting buckle 3 are installed on the housing 15.

[0053] Example 2: Reference Figure 7 and Figure 8 Unlike Embodiment 1, this embodiment features an unlocking groove 154 on the housing 15 that communicates with the receiving hole 153. An inner clamping member 5 is slidably mounted on the unlocking groove 154, sliding along the arrangement direction of the module parallel member 4 and the grounding terminal block 13. A clamping elastic member 6 connects the clamping member 5 to the housing 15, allowing the clamping member 5 to slide and press the module parallel member 4 against the grounding terminal block 13. The clamping member 5 can be a metal plate or a plastic plate, and the clamping elastic member 6 can be a spring. In this embodiment, the clamping elastic member 6 is a tension spring; the spring hook is not shown in the figure.

[0054] Reference Figure 8 A locking block 51 is integrally formed on the surface of the clamping member 5 near the module parallel member 4, and a slot 41 is provided on the module parallel member 4 for the locking block 51 to be inserted. An inclined guide surface 42 is formed on the surface of the module parallel member 4, which is used to slide against the clamping member 5 and drive the clamping member 5 to slide away from the ground terminal block 13.

[0055] When installing the parallel module 4, the guide surface 42 of the parallel module 4 slides against the clamping member 5, causing the clamping member 5 to slide away from the grounding terminal block 13. This allows the end of the parallel module 4 to slide between the clamping member 5 and the grounding terminal block 13 until the parallel module 4 slides until the locking block 51 aligns with the slot 41. Under the elastic force of the clamping elastic member 6, the clamping member 5 slides until the locking block 51 inserts into the slot 41, pressing the parallel module 4 firmly onto the grounding terminal block 13, ensuring the stability of the electrical connection. The locking block 51 and the slot 41 cooperate to prevent the parallel module 4 from slipping off the grounding terminal block 13 along the disassembly / removal direction.

[0056] Referring to Figure 7 , the blocking pieces are the unlocking pieces 7, which are used to block the accommodating holes 153 of the shell 15 on both sides in the arrangement direction when the multi-pulse surge protector is working normally. The unlocking pieces 7 can be plastic plugs or metal plugs.

[0057] Referring to Figure 8 , the slot wall of the unlocking slot 154 is provided with a limiting slot 155 for inserting and rotating the end of the unlocking piece 7, and the slot wall of the limiting slot 155 is used to abut against the end of the unlocking piece 7. The transmission piece 8 is rotatably installed in the limiting slot 155, and the rotation axis of the transmission piece 8 extends in a direction perpendicular to the sliding direction of the pressing piece 5.

[0058] Referring to Figure 9 and Figure 10 , the two ends of the transmission piece 8 are respectively the abutting part 81 and the transmission part 82, the unlocking piece 7 is used to abut and push the abutting part 81, and the transmission part 82 is used to abut and push the pressing piece 5 to slide away from the module parallel piece 4. The transmission part 82 of the transmission piece 8 is connected with the reset elastic piece 9, which is a torsion spring, and is sleeved on the rotation axis of the transmission piece 8, so that the transmission part 82 of the transmission piece 8 rotates away from the pressing piece 5. The transmission piece 8 can be a metal or plastic lever. The pressing piece 5 is provided with a transmission slot for inserting the transmission part 82.

[0059] Referring to Figure 9 and Figure 10 , the abutting part 81 is formed with an inclined sliding surface 811, and the end of the unlocking piece 7 is used to slide against the sliding surface 811 to drive the transmission piece 8 to rotate to push the pressing piece 5.

[0060] When it is necessary to maintain or replace the internal structure of the multi-pulse surge protector, the unlocking piece 7 is removed from the accommodating hole 153 and inserted into the unlocking slot 154. When the unlocking piece 7 is inserted to a certain depth in the unlocking slot 154 (it cannot be inserted any further), the unlocking piece 7 is rotated, the end of the unlocking piece 7 slides against the sliding surface 811 to drive the transmission piece 8 to rotate and push the pressing piece 5 to slide away from the module parallel piece 4 until the end of the unlocking piece 7 abuts against the slot wall of the limiting slot 155. At this time, the hands of the user are released, and the unlocking piece 7 will not come out of the unlocking slot 154. At this time, the module parallel piece 4 is not pressed, and the clamping block 51 is out of the clamping slot 41, so that the adjacent protection module 1 can be separated.

[0061] In other embodiments, the sliding surface 811 can not be provided, and the insertion of the unlocking piece 7 can directly trigger the rotation of the transmission piece 8. However, this design requires the application of continuous force to the unlocking piece 7, and the hands cannot be released.

[0062] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A multi-pulse surge protector, characterized by: The protection module (1) comprises at least two protection modules (1) arranged in parallel, one of which is used for connecting the live wire of the power supply, and the rest are used for connecting the zero line, each of the protection modules (1) comprises at least two protection units (11) arranged in parallel, each of the protection units (11) comprises a series branch formed by a surge protection element (111) and a backup protection element (112), and the protection module (1) further comprises a fault indication unit (12), the fault indication unit (12) comprises an indicator light (121), and the indicator light (121) is connected in parallel with each protection unit (11).

2. A multi-pulse surge protector according to claim 1, wherein: The protection module (1) further comprises an electrically connected ground terminal block (13) and a ground connection piece (14), the ground terminal block (13) is used for connecting the ground wire, the ground connection piece (14) comprises at least two connection parts (141) connected in series with each protection unit (11), the ground connection piece (14) is provided with a punching hole (142), the hole wall of the punching hole (142) is connected with a limiting piece (143), the ground terminal block (13) is provided with a through hole (131) through which the limiting piece (143) passes, and the limiting piece (143) abuts against the surface of the ground terminal block (13) away from the ground connection piece (14).

3. A multi-pulse surge protector according to claim 2, wherein: The protection unit (11) comprises at least two line outlet connecting plates (113) electrically connected with different surge protection elements (111), the connection part (141) comprises a bending section and a guide section connected together, the bending section and the guide section are both arranged in an inclined manner and have opposite inclined directions, the guide section is used for slidingly abutting against the line outlet connecting plate (113), and the line outlet connecting plate (113) abuts against the connection part of the bending section and the guide section.

4. A multi-pulse surge protector as claimed in claim 1, wherein: Further comprising at least one module connection piece (2), the protection module (1) further comprises a shell (15), the protection unit (11) is arranged on the shell (15), the shell (15) is provided with a placing groove (151), and the two ends of the module connection piece (2) are respectively placed in the placing grooves (151) of the adjacent shells (15). The module connection piece (2) is detachably connected with the shell (15).

5. A multi-pulse surge protector as claimed in claim 4, wherein: Further comprising at least one connecting buckle (3), the shell (15) is provided with a clamping groove (152), and the two ends of the connecting buckle (3) are respectively clamped and fixed with the clamping grooves (152) of the adjacent shells (15). The clamping groove (152) and the placing groove (151) are respectively arranged on the two end portions of the shell (15).

6. A multi-pulse surge protector as claimed in claim 1, wherein: Further comprising at least one module parallel connection piece (4), the protection module (1) further comprises a ground terminal block (13), the ground terminal block (13) is used for connecting the ground wire, the ground terminal block (13) is connected in series with each protection unit (11), the two ends of the module parallel connection piece (4) are respectively electrically connected with the ground terminal blocks (13) of the adjacent protection modules (1), and the module parallel connection piece (4) is detachably connected with the ground terminal block (13).

7. A multi-pulse surge protector as claimed in claim 6, wherein: The protection module (1) further comprises a shell (15), the protection unit (11), the ground wire terminal block (13) and the module parallel piece (4) are arranged on the shell (15), a pressing piece (5) is slidably arranged on the shell (15), a pressing elastic piece (6) is connected between the pressing piece (5) and the shell (15) to slide the pressing piece (5) to press the module parallel piece (4) on the ground wire terminal block (13), a clamping block (51) is arranged on the pressing piece (5), a clamping groove (41) is formed on the module parallel piece (4) for inserting the clamping block (51), an inclined guide surface (42) is formed on the surface of the module parallel piece (4), and the guide surface (42) is used for slidingly abutting against the pressing piece (5) to drive the pressing piece (5) to slide away from the ground wire terminal block (13).

8. A multi-pulse surge protector according to claim 7, wherein: The shell (15) is provided with an accommodating hole (153) extending therethrough for inserting and passing out the module parallel piece (4), the shell (15) is further provided with two unlocking pieces (7), the two unlocking pieces (7) are respectively used for plugging the accommodating holes (153) of the shells (15) located on both sides in the arrangement direction, the shell (15) is provided with an unlocking groove (154) in communication with the accommodating hole (153), the pressing piece (5) is slidably arranged in the unlocking groove (154), the unlocking groove (154) is used for inserting the unlocking piece (7), a transmission piece (8) is rotatably arranged in the unlocking groove (154), the rotation axis of the transmission piece (8) extends in a direction perpendicular to the sliding direction of the pressing piece (5), the two ends of the transmission piece (8) are respectively an abutting portion (81) and a transmission portion (82), the unlocking piece (7) is used for abutting and pushing the abutting portion (81), the transmission portion (82) is used for abutting and pushing the pressing piece (5) to slide to disengage the module parallel piece (4), and a reset elastic piece (9) is connected between the transmission piece (8) and the shell (15) to rotate the transmission portion (82) of the transmission piece (8) away from the pressing piece (5).

9. A multi-pulse surge protector as claimed in claim 8, wherein: A limiting groove (155) is formed in the groove wall of the unlocking groove (154) for inserting and rotating the end of the unlocking piece (7), the groove wall of the limiting groove (155) is used for abutting against the end of the unlocking piece (7), the transmission piece (8) is rotatably arranged in the limiting groove (155), an inclined sliding surface (811) is formed on the abutting portion (81), the end of the unlocking piece (7) is used for slidingly abutting against the sliding surface (811) to drive the transmission piece (8) to rotate.

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