CN216146090U - SPD with backup protection switch - Google Patents
SPD with backup protection switch Download PDFInfo
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- CN216146090U CN216146090U CN202121819701.XU CN202121819701U CN216146090U CN 216146090 U CN216146090 U CN 216146090U CN 202121819701 U CN202121819701 U CN 202121819701U CN 216146090 U CN216146090 U CN 216146090U
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Abstract
The utility model provides an SPD with a backup protection switch, which is characterized by comprising a shell, a power inlet end, an electromagnetic mechanism, a contact mechanism, a gap protection mechanism, a fireproof mechanism, a ground wire end of a multi-piece protection mechanism and a circuit board, wherein a plurality of placing cavities are arranged on the inner side of the shell, the power inlet end, the electromagnetic mechanism, the contact mechanism, the gap protection mechanism, the fireproof mechanism, the multi-piece protection mechanism, the ground wire end and the circuit board are respectively placed in the placing cavities, and the power inlet end is connected with the contact mechanism through a copper wire. Ensuring the normal use of the utility model.
Description
Technical Field
The utility model relates to the field of surge protection devices, in particular to an SPD with a backup protection switch.
Background
When the existing SPD is used, an SPD backup protection switch, a fuse, a circuit breaker and the like are required to be arranged at the front end of the existing SPD, and when thunder flows through the SPD backup protection switch, the fuse, the circuit breaker and the like, a small current breakdown phenomenon or insensitive breaking of a gap protection mechanism can also happen sometimes, so that accident power failure is caused, and the normal use of an electric appliance and the SPD is influenced.
When the existing SPD backup protection switch, the fuse, the circuit breaker and the like are installed, the installation is not easy because of more internal parts and different shapes, and particularly, the installation of the SPD is influenced because a fireproof mechanism with an irregular shape is easy to move when being installed.
When the SPD backup protection switch is struck by lightning, the gap protection mechanism is broken down and simultaneously has sparks, heat generated by the sparks can be dissipated along with the fireproof mechanism, but the sparks are not easy to dissipate, and the SPD backup protection switch is easy to burn.
Disclosure of Invention
According to the technical problems, the utility model provides an SPD with a backup protection switch, which is characterized by comprising a shell, a power inlet end, an electromagnetic mechanism, a contact mechanism, a gap protection mechanism, a fireproof mechanism, a multi-piece protection mechanism, a ground wire end and a circuit board, wherein a plurality of placing cavities are arranged on the inner side of the shell, the power inlet end, the electromagnetic mechanism, the contact mechanism, the gap protection mechanism, the fireproof mechanism, the multi-piece protection mechanism, the ground wire end and the circuit board are respectively placed in the placing cavities, the power inlet end is connected with the contact mechanism through a copper wire, the lower side of the power inlet end is contacted with the fireproof mechanism, the contact mechanism is contacted with the gap protection mechanism, the electromagnetic mechanism is arranged on the upper side of the gap protection mechanism, one end of the electromagnetic mechanism is matched with the contact mechanism for use, the lower end of the contact mechanism is contacted with the gap protection mechanism, and the electromagnetic mechanism is arranged on the upper side of the gap protection mechanism, the electromagnetic mechanism is characterized in that two ends of the electromagnetic mechanism are connected with a gap protection mechanism, the rear side of the gap protection mechanism is connected with a plurality of protection mechanisms, the side surfaces of the plurality of protection mechanisms are connected with a ground wire end, the receiver is connected with a circuit board, a fireproof mechanism is arranged on the lower side of the gap protection mechanism, a connecting sheet is arranged on the lower side of the fireproof mechanism and is contacted with a power inlet end, and the connecting sheet is connected with a resistor through a wire;
the device comprises a placing cavity, a fire-proof mechanism placing cavity, a multi-chip protection mechanism placing cavity, a ground wire end placing cavity, a circuit board placing cavity, a supporting structure and a clamping structure, wherein the placing cavity is divided into a power inlet end placing cavity, an electromagnetic mechanism placing cavity, a contact mechanism placing cavity, a clearance protection mechanism placing cavity, a fire-proof mechanism placing cavity, a multi-chip protection mechanism placing cavity, a ground wire end placing cavity and a circuit board placing cavity;
the gap protection mechanism placing cavity and the fireproof mechanism placing cavity are also internally provided with air deflectors, the air deflectors in the fireproof mechanism placing cavity are provided with limit blocks, and the fireproof mechanism is placed on the air deflectors and two ends of the fireproof mechanism are in contact with the limit blocks; the upper side of the air deflector of the space protection mechanism placing cavity is provided with a partition plate, the partition plate forms a heat dissipation cavity, the space protection mechanism is placed on the upper side of the partition plate, and the front side of the fireproof mechanism placing cavity is provided with a drainage hole.
The multiple protection mechanisms are connected with a ground wire end through copper wires.
The copper wire is a connecting structure woven by copper wires.
Clearance protection mechanism comprises epitheca, inferior valve, screening glass, packing ring, install a screening glass in the epitheca, install another screening glass in the inferior valve, epitheca, inferior valve pass through the buckle fixed together, are fixed with the packing ring between two screening glasses, epitheca and inferior valve downside are seted up flutedly respectively, and the through-hole is constituteed to two recesses, and clearance protection mechanism places when placing the chamber this through-hole and cut apart the heat dissipation intracavity that the board formed corresponding.
Be provided with the baffle between clearance protection mechanism and the fire prevention mechanism, clearance protection mechanism downside is installed to the baffle upside and fire prevention mechanism is installed, spacing card is installed respectively to baffle upside, downside, spacing card is injectd clearance protection mechanism and fire prevention mechanism position.
The multi-sheet protection mechanism is a multi-sheet graphite gap machine, the multi-sheet graphite gap mechanism is composed of a supporting structure, a plurality of graphite structures, an inner connecting frame and an outer connecting frame, the graphite structures are composed of two graphite sheets, the two graphite sheets are connected through the inner connecting frame, the two adjacent graphite structures are connected through the outer connecting frame, each supporting structure is composed of a bottom plate, a partition plate and side plates, the partition plate is installed on the upper side of the bottom plate, the graphite structures are installed on two sides of the partition plate, the side plates are installed on the side faces of the bottom plate and are of a 7-shaped structure, mounting holes are formed in the side plates, the inner connecting frame of the graphite structure on the outermost side is connected with the connecting plate, and the connecting plate penetrates through the mounting holes and is connected with the ground wire end.
The multi-chip protection mechanism comprises a multi-chip piezoresistor mechanism and a thermal tripping protection mechanism, the multi-chip piezoresistor mechanism is connected with the side face through the thermal tripping mechanism and the ground wire end, the multi-chip piezoresistor mechanism is formed by connecting a plurality of piezoresistors in parallel, and the thermal tripping protection mechanism connecting plate penetrates through the mounting hole and is connected with the ground wire end.
The thermal tripping protection mechanism is composed of a push rod spring, a push rod support and a thermal tripping protection copper sheet, the thermal tripping protection copper sheet is fixed on the upper side of the push rod support, the push rod spring is installed on the lower side of the push rod support, the push rod support is installed on the shell, and the push rod spring is located between the push rod support and the shell. The multi-piece graphite clearance mechanism comprises a supporting copper sheet, an alloy graphite sheet, a Teflon ring, an insulating sleeve, a fixing bolt, a capacitor, a limiting groove, a limiting bulge, a circuit board mounting groove and a circuit board, wherein the circuit board mounting groove is formed in the upper side of the supporting copper sheet, the limiting groove and a fixing screw hole are formed in the upper side of the supporting copper sheet, the limiting bulge is arranged in the limiting groove, the fixing bolt is arranged in the fixing screw hole, the insulating sleeve is sleeved on the fixing bolt, the mounting bulge is arranged on the insulating sleeve, the mounting groove is formed by the mounting bulge and the insulating sleeve, the alloy graphite sheet is placed in the mounting groove, the number of the alloy graphite sheets is N, the number of N is more than or equal to 2, the Teflon ring is placed on the mounting bulge, the circuit board is mounted in the circuit board mounting groove, the capacitor and a support leg are mounted on the circuit board and connected with the support leg, the legs are joined to an N-1 alloy graphite sheet, the last of which is not joined to the legs.
The utility model has the beneficial effects that: the utility model improves the prior structure, and the back protection switch is arranged in the SPD, and the improved back protection switch is internally provided with a power frequency current and lightning current bi-pass loop, thereby realizing the quick breaking of power frequency small current and no tripping of lightning current impact, and achieving the effects of fire protection of the power frequency small current surge protector and continuous work of the lightning current impact surge protector.
The utility model improves the existing structure, the connecting sheet and the resistor are added at the power inlet end, when in use, the current at the power inlet end is weakened through the connecting sheet and the resistor, and the resistor is connected with the circuit board, so that the current board is prevented from being damaged by heavy current.
The gap protection mechanism placing cavity and the fireproof mechanism placing cavity are internally provided with the air deflector, the limiting block and the heat dissipation cavity, the limiting block facilitates installation of the fireproof mechanism, and the situation that the fireproof mechanism shakes during installation to influence the assembly of the fireproof mechanism is avoided; the heat dissipation cavity is opposite to the through hole of the gap protection mechanism, when the gap protection mechanism is broken down, heat and sparks can be transferred to the fireproof mechanism along the heat dissipation cavity and the air deflector and then flow out to the outside along the flow discharge port, and therefore too high internal heat and internal combustion are avoided.
The copper wire is a connecting structure woven by copper wires, so that the current conduction effect and the current conduction stability of the utility model are improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a gap protection mechanism placing cavity and a fireproof mechanism placing cavity of the utility model;
FIG. 3 is a schematic diagram of a spacer structure of the gap protection mechanism of the present invention;
FIG. 4 is a schematic structural view of a multi-piece graphite gap mechanism according to the present invention;
FIG. 5 is a schematic view of a support structure of the multi-piece graphite gap mechanism of the present invention;
FIG. 6 is a schematic side view of a multi-piece graphite gap mechanism according to the present invention;
FIG. 7 is a schematic structural view of a multi-piece graphite gap mechanism according to the present invention.
Fig. 8 is a thermal trip protection structure of the present invention.
As shown in the figure: the device comprises a shell 1, a power inlet end 2, an electromagnetic mechanism 3, a contact mechanism 4, a gap protection mechanism 5, a fireproof mechanism 6, a multi-sheet graphite gap mechanism 7, a ground wire end 8, a circuit board 9, a placing cavity 10, a partition plate 11, a thermal trip protection mechanism 12, a supporting structure 7-1, a graphite structure 7-2, an inner connecting frame 7-3, an outer connecting frame 7-4, a bottom plate 7-11, a partition plate 7-12 and side plates 7-13. 7-1% of supporting copper sheets, 7-2% of alloy graphite sheets, 7-3% of tetrafluoro rings, 7-4% of insulating sleeves and 7-5% of fixing bolts.
Detailed Description
Example 1
The present invention provides
A SPD with a backup protection switch is characterized by comprising a shell, a power inlet end, an electromagnetic mechanism, a contact mechanism, a gap protection mechanism, a fireproof mechanism, a multi-piece protection mechanism, a ground wire end and a circuit board, wherein a plurality of placing cavities are formed in the inner side of the shell, the power inlet end, the electromagnetic mechanism, the contact mechanism, the gap protection mechanism, the fireproof mechanism, the multi-piece protection mechanism, the ground wire end and the circuit board are respectively placed in the placing cavities, the power inlet end is connected with the contact mechanism through a copper wire, the lower side of the power inlet end is contacted with the fireproof mechanism, the contact mechanism is contacted with the gap protection mechanism, the electromagnetic mechanism is installed on the upper side of the gap protection mechanism, one end of the electromagnetic mechanism is matched with the contact mechanism for use, the lower end of the contact mechanism is contacted with the gap protection mechanism, the electromagnetic mechanism is arranged on the upper side of the gap protection mechanism, and the two ends of the electromagnetic mechanism are connected with the gap protection mechanism, the rear side of the gap protection mechanism is connected with the multiple protection mechanisms, the side faces of the multiple protection mechanisms are connected with a ground wire end, the receiver is connected with the circuit board, the fireproof mechanism is installed on the lower side of the gap protection mechanism, the connecting sheet is installed on the lower side of the fireproof mechanism and is contacted with the power inlet end, and the connecting sheet is connected with the resistor through a wire;
the device comprises a placing cavity, a fire-proof mechanism placing cavity, a multi-chip protection mechanism placing cavity, a ground wire end placing cavity, a circuit board placing cavity, a supporting structure and a clamping structure, wherein the placing cavity is divided into a power inlet end placing cavity, an electromagnetic mechanism placing cavity, a contact mechanism placing cavity, a clearance protection mechanism placing cavity, a fire-proof mechanism placing cavity, a multi-chip protection mechanism placing cavity, a ground wire end placing cavity and a circuit board placing cavity;
the gap protection mechanism placing cavity and the fireproof mechanism placing cavity are also internally provided with air deflectors, the air deflectors in the fireproof mechanism placing cavity are provided with limit blocks, and the fireproof mechanism is placed on the air deflectors and two ends of the fireproof mechanism are in contact with the limit blocks; the upper side of the air deflector of the space protection mechanism placing cavity is provided with a partition plate, the partition plate forms a heat dissipation cavity, the space protection mechanism is placed on the upper side of the partition plate, and the front side of the fireproof mechanism placing cavity is provided with a drainage hole.
The multiple protection mechanisms are connected with a ground wire end through copper wires.
The copper wire is a connecting structure woven by copper wires.
Clearance protection mechanism comprises epitheca, inferior valve, screening glass, packing ring, install a screening glass in the epitheca, install another screening glass in the inferior valve, epitheca, inferior valve pass through the buckle fixed together, are fixed with the packing ring between two screening glasses, epitheca and inferior valve downside are seted up flutedly respectively, and the through-hole is constituteed to two recesses, and clearance protection mechanism places when placing the chamber this through-hole and cut apart the heat dissipation intracavity that the board formed corresponding.
Be provided with the baffle between clearance protection mechanism and the fire prevention mechanism, clearance protection mechanism downside is installed to the baffle upside and fire prevention mechanism is installed, spacing card is installed respectively to baffle upside, downside, spacing card is injectd clearance protection mechanism and fire prevention mechanism position.
The multi-sheet protection mechanism is a multi-sheet graphite gap machine, the multi-sheet graphite gap mechanism is composed of a supporting structure, a plurality of graphite structures, an inner connecting frame and an outer connecting frame, the graphite structures are composed of two graphite sheets, the two graphite sheets are connected through the inner connecting frame, the two adjacent graphite structures are connected through the outer connecting frame, each supporting structure is composed of a bottom plate, a partition plate and side plates, the partition plate is installed on the upper side of the bottom plate, the graphite structures are installed on two sides of the partition plate, the side plates are installed on the side faces of the bottom plate and are of a 7-shaped structure, mounting holes are formed in the side plates, the inner connecting frame of the graphite structure on the outermost side is connected with the connecting plate, and the connecting plate penetrates through the mounting holes and is connected with the ground wire end.
The multi-chip protection mechanism comprises a multi-chip piezoresistor mechanism and a thermal tripping protection mechanism, the multi-chip piezoresistor mechanism is connected with the side face through the thermal tripping mechanism and the ground wire end, the multi-chip piezoresistor mechanism is formed by connecting a plurality of piezoresistors in parallel, and the thermal tripping protection mechanism connecting plate penetrates through the mounting hole and is connected with the ground wire end.
The thermal tripping protection mechanism is composed of a push rod spring, a push rod support and a thermal tripping protection copper sheet, the thermal tripping protection copper sheet is fixed on the upper side of the push rod support, the push rod spring is installed on the lower side of the push rod support, the push rod support is installed on the shell, and the push rod spring is located between the push rod support and the shell. The multi-piece graphite clearance mechanism comprises a supporting copper sheet, an alloy graphite sheet, a Teflon ring, an insulating sleeve, a fixing bolt, a capacitor, a limiting groove, a limiting bulge, a circuit board mounting groove and a circuit board, wherein the circuit board mounting groove is formed in the upper side of the supporting copper sheet, the limiting groove and a fixing screw hole are formed in the upper side of the supporting copper sheet, the limiting bulge is arranged in the limiting groove, the fixing bolt is arranged in the fixing screw hole, the insulating sleeve is sleeved on the fixing bolt, the mounting bulge is arranged on the insulating sleeve, the mounting groove is formed by the mounting bulge and the insulating sleeve, the alloy graphite sheet is placed in the mounting groove, the number of the alloy graphite sheets is N, the number of N is more than or equal to 2, the Teflon ring is placed on the mounting bulge, the circuit board is mounted in the circuit board mounting groove, the capacitor and a support leg are mounted on the circuit board and connected with the support leg, the legs are joined to an N-1 alloy graphite sheet, the last of which is not joined to the legs.
Example 2
When the lightning stroke protection device is used, the switch is turned on, when the lightning stroke current is not large, the current enters the lightning stroke protection device from the power input end, then flows through the power input end and the connecting sheet, enters the resistor, weakens the current, passes through the resistor and then passes through the contact mechanism and the gap protection mechanism by the copper wire, at the moment, the static contact of the contact mechanism is connected with the static contact of the gap mechanism, the static contact respectively transmits the current to the electromagnetic mechanism and the gap mechanism, and because the two sides of the electromagnetic mechanism are respectively connected with the protection sheets on the two sides of the upper gap mechanism, the circuit is not communicated.
When lightning current is too large, a static contact of the contact mechanism is connected with a static contact of the gap mechanism, the equipment normally operates, current enters the equipment from the current inlet mechanism, the current enters the contact mechanism from the current inlet mechanism through a movable contact, then enters the static contact in the gap mechanism from the static contact in the contact mechanism, the current enters the gap mechanism, due to the fact that the current is too large, gap air seen by a protective sheet gasket of the gap protection mechanism breaks down, the current conducts and connects an upper protective sheet and a lower protective sheet, the current enters the electromagnetic mechanism from the static contact in the gap mechanism, a coil of the electromagnetic mechanism is electrified to generate a magnetic field, an ejector pin in a coil support moves to impact the switch mechanism, a hook of the switch mechanism is tripped, the surge protector is disconnected, and the electrical equipment is protected. At the moment, because of current breakdown, the inside of the heat dissipation device is filled with heat and sparks, particularly, the through hole on the side face of the gap protection mechanism is opposite to the heat dissipation cavity, the heat and the sparks in the inside enter the heat dissipation cavity, and the heat and the sparks can be transferred to the fireproof mechanism along the heat dissipation cavity and the air deflector, so that the too high inside heat in the heat dissipation device is avoided, and the inside combustion in the heat dissipation device is also avoided.
The special backup protection switch and the multi-piece protection mechanism are arranged in the surge protection device, the surge tolerance capacity to the 10|350 mu S waveform can reach 15KA, the surge protection device has a wider power frequency overload protection range, the surge protection device has excellent comprehensive performance in the aspects of high short-circuit breaking and low short-circuit instantaneous action, the SPD can be protected from being damaged by TOV, high short-circuit current with the amplitude value up to 50KA can be cut off, low short-circuit current with the amplitude value more than 3A can be cut off in extreme time, the tripping contact mechanism is arranged in the SPD, the voltage at two ends of the SPD is lower when the surge occurs, the size modulus is realized, the installation space is greatly saved, and better self protection can be performed.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. While the utility model has been described with respect to the above embodiments, it will be understood by those skilled in the art that the utility model is not limited to the above embodiments, which are described in the specification and illustrated only to illustrate the principles of the utility model, but that various changes and modifications may be made without departing from the spirit and scope of the utility model as defined by the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (9)
1. A SPD with a backup protection switch is characterized by comprising a shell, a power inlet end, an electromagnetic mechanism, a contact mechanism, a gap protection mechanism, a fireproof mechanism, a multi-piece protection mechanism, a ground wire end and a circuit board, wherein a plurality of placing cavities are formed in the inner side of the shell, the power inlet end, the electromagnetic mechanism, the contact mechanism, the gap protection mechanism, the fireproof mechanism, the multi-piece protection mechanism, the ground wire end and the circuit board are respectively placed in the placing cavities, the power inlet end is connected with the contact mechanism through a copper wire, the lower side of the power inlet end is contacted with the fireproof mechanism, the contact mechanism is contacted with the gap protection mechanism, the electromagnetic mechanism is installed on the upper side of the gap protection mechanism, one end of the electromagnetic mechanism is matched with the contact mechanism for use, the lower end of the contact mechanism is contacted with the gap protection mechanism, the electromagnetic mechanism is arranged on the upper side of the gap protection mechanism, and the two ends of the electromagnetic mechanism are connected with the gap protection mechanism, the rear side of the gap protection mechanism is connected with the multiple protection mechanisms, the side faces of the multiple protection mechanisms are connected with a ground wire end, the circuit board is connected with the receiver, the fireproof mechanism is installed on the lower side of the gap protection mechanism, the connecting sheet is installed on the lower side of the fireproof mechanism and is contacted with the power inlet end, and the connecting sheet is connected with the resistor through a wire;
the device comprises a placing cavity, a fire-proof mechanism placing cavity, a multi-chip protection mechanism placing cavity, a ground wire end placing cavity, a circuit board placing cavity, a supporting structure and a clamping structure, wherein the placing cavity is divided into a power inlet end placing cavity, an electromagnetic mechanism placing cavity, a contact mechanism placing cavity, a clearance protection mechanism placing cavity, a fire-proof mechanism placing cavity, a multi-chip protection mechanism placing cavity, a ground wire end placing cavity and a circuit board placing cavity;
the gap protection mechanism placing cavity and the fireproof mechanism placing cavity are also internally provided with air deflectors, the air deflectors in the fireproof mechanism placing cavity are provided with limit blocks, and the fireproof mechanism is placed on the air deflectors and two ends of the fireproof mechanism are in contact with the limit blocks; the upper side of the air deflector of the space protection mechanism placing cavity is provided with a partition plate, the partition plate forms a heat dissipation cavity, the space protection mechanism is placed on the upper side of the partition plate, and the front side of the fireproof mechanism placing cavity is provided with a drainage hole.
2. The SPD with its own backup protection switch according to claim 1, wherein said multichip protection mechanism is connected through copper wires and ground terminals.
3. The SPD with the backup protection switch according to claim 2, wherein the copper wire is a connection structure made of copper wire weaving.
4. The SPD with the backup protection switch according to claim 1, wherein the gap protection mechanism comprises an upper shell, a lower shell, a protection sheet and a gasket, the protection sheet is arranged in the upper shell, the other protection sheet is arranged in the lower shell, the upper shell and the lower shell are fixed together through a buckle, the gasket is fixed between the two protection sheets, the lower sides of the upper shell and the lower shell are respectively provided with a groove, the two grooves form a through hole, and the through hole corresponds to a heat dissipation cavity formed by the partition plate when the gap protection mechanism is placed in the placing cavity.
5. The SPD with the backup protection switch according to claim 1, wherein a partition plate is arranged between the gap protection mechanism and the fire protection mechanism, the fire protection mechanism is arranged on the upper side of the partition plate and is arranged on the lower side of the gap protection mechanism, and limit cards are respectively arranged on the upper side and the lower side of the partition plate and limit the positions of the gap protection mechanism and the fire protection mechanism.
6. The SPD with the backup protection switch according to claim 1, wherein the multi-piece protection mechanism is a multi-piece graphite gap machine, the multi-piece graphite gap machine is composed of a supporting structure, a graphite structure, an inner connecting frame and an outer connecting frame, the graphite structure is multiple, the graphite structure is composed of two graphite pieces, the two graphite pieces are connected through the inner connecting frame, the two adjacent graphite structures are connected through the outer connecting frame, the supporting structure is composed of a bottom plate, a partition plate and side plates, the partition plate is installed on the upper side of the bottom plate, the graphite structures are installed on two sides of the partition plate, the side plates are 7-shaped structures and are provided with installation holes, the inner connecting frame of the graphite structure on the outermost side is connected with the connecting plate, and the connecting plate penetrates through the installation holes and is connected with a ground wire end.
7. The SPD with a backup protection switch according to claim 1, wherein the multi-chip protection mechanism is a multi-chip piezoresistor mechanism and a thermal trip protection mechanism, the multi-chip piezoresistor mechanism is connected with the side surface through the thermal trip mechanism and the ground terminal, the multi-chip piezoresistor mechanism is formed by connecting a plurality of piezoresistors in parallel, and the connecting plate of the thermal trip protection mechanism penetrates through the mounting hole and is connected with the ground terminal.
8. The SPD with a backup protection switch according to claim 7, wherein the thermal trip protection mechanism comprises a push rod spring, a push rod bracket and a thermal trip protection copper sheet, the thermal trip protection copper sheet is fixed on the upper side of the push rod bracket, the push rod spring is installed on the lower side of the push rod bracket, the push rod bracket is installed on the shell, and the push rod spring is located between the push rod bracket and the shell.
9. The SPD with a backup protection switch according to claim 6, wherein the multi-piece graphite gap mechanism comprises a supporting copper sheet, an alloy graphite sheet, a Teflon ring, an insulating sleeve, a fixing bolt, a capacitor, a limiting groove, a limiting protrusion, a circuit board mounting groove and a circuit board, the circuit board mounting groove is formed on the upper side of the supporting copper sheet, the limiting groove and a fixing screw hole are formed on the upper side of the supporting copper sheet, the limiting protrusion is arranged in the limiting groove, the fixing bolt is arranged in the fixing screw hole, the insulating sleeve is sleeved on the fixing bolt, the insulating sleeve is provided with the mounting protrusion, the mounting protrusion and the insulating sleeve form a mounting groove, the alloy graphite sheet is arranged in the mounting groove, the number of the alloy graphite sheets is N, the number of N is more than or equal to 2, the Teflon ring is arranged on the mounting protrusion, the circuit board mounting groove is arranged in the circuit board mounting groove, the circuit board is provided with a capacitor and a support leg, the capacitor is connected with the support leg, the support leg is connected with the N-1 alloy graphite sheet, and the last alloy graphite sheet is not connected with the support leg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121819701.XU CN216146090U (en) | 2021-08-05 | 2021-08-05 | SPD with backup protection switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121819701.XU CN216146090U (en) | 2021-08-05 | 2021-08-05 | SPD with backup protection switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216146090U true CN216146090U (en) | 2022-03-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121819701.XU Active CN216146090U (en) | 2021-08-05 | 2021-08-05 | SPD with backup protection switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216146090U (en) |
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2021
- 2021-08-05 CN CN202121819701.XU patent/CN216146090U/en active Active
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