A blade-type 1U surge protector

Abstract

The present application relates to a kind of blade type 1U surge protector, belong to the technical field of surge protector, blade type 1U surge protector, including inner shell, varistor and tripping assembly, the varistor is arranged in one side of inner shell, the tripping assembly is slidably arranged in the other side of inner shell, one side of the varistor is provided with first electrode piece, the other side is provided with second electrode piece, the first electrode piece is used to be electrically connected with pin spring piece A, the tripping assembly is provided with welding piece, the welding piece is located in the length direction of varistor in one side of inner shell, the second electrode piece is welded with welding piece, constitutes tripping point, the welding piece is used to be electrically connected with pin spring piece B, elastic element is arranged between the tripping assembly and inner shell.The present application has the advantages that the thickness of surge protector is further reduced, the required installation space is reduced, and the thickness of surge protector is designed to be not more than 10mm according to the standard of single-piece circuit breaker slot width.

Description

Technical Field

[0001] This invention relates to the field of surge protector technology, and in particular to a blade-type 1U surge protector. Background Technology

[0002] A surge protector is a device used to protect electrical equipment from damage caused by lightning or transient overvoltage fluctuations. A 1U surge protector refers to a surge protection device with a unit height of 1.75 inches or 44.45 mm standard rack height.

[0003] In related technologies, such as Chinese patent document CN218771267U, a 1U pluggable DC surge protector is disclosed. It includes a tripping component located between a low-temperature trip spring and a varistor, and an inner shell. One side of the inner shell has a varistor placement slot for mounting the varistor; the other side has a tripping component placement slot for mounting the tripping component. The low-temperature trip spring is connected to the tripping component. A low-temperature pin hole is provided through the varistor placement slot and the tripping component placement slot. The low-temperature pin of the varistor is located at the low-temperature pin hole and is low-temperature welded to one end of the low-temperature trip spring to form a low-temperature tripping point. The surge protector also includes microswitches and remote signaling pins integrated on both sides of a circuit board. The tripping component is connected to an elastic element. The high-temperature pin of the varistor is connected to pin spring a, and the low-temperature trip spring is connected to pin spring b. When tripped, the elastic element pulls the tripping cutoff assembly toward the micro switch, causing the low-temperature tripping spring to disengage from the low-temperature pin of the varistor, thus achieving tripping and power-off. The thickness of this product can be integrated up to 12mm.

[0004] Currently, industry standards stipulate that the width of a single circuit breaker slot should not exceed 10mm. To facilitate the structural design of the system backend, the size of the surge protector must be consistent with the size of the intelligent circuit breaker used in conjunction with it. However, in related technologies, the thinnest surge protector is 12mm, which makes it impossible to meet the design requirements. Summary of the Invention

[0005] To further reduce the thickness of surge protectors and thus the required installation space, and to meet the standard requirement that the thickness of surge protectors should not exceed 10mm according to the design of the slot width of a single circuit breaker, this invention provides a blade-type 1U surge protector.

[0006] The blade-type 1U surge protector provided by this invention adopts the following technical solution: A blade-type 1U surge protector includes an inner shell, a varistor, and a tripping assembly. The varistor is disposed on one side of the inner shell, and the tripping assembly is slidably disposed on the other side of the inner shell. The sliding direction of the tripping assembly is parallel to the length direction of the inner shell. A first electrode is disposed on one side of the varistor, and a second electrode is disposed on the other side. The first electrode is used for electrical connection with a pin spring A. The tripping assembly is provided with a welding piece located on one side of the varistor along the length direction of the inner shell. The second electrode is welded to the welding piece to form a tripping point. The welding piece is used for electrical connection with a pin spring B. An elastic element is disposed between the tripping assembly and the inner shell. The elastic element is used to pull the tripping assembly to move the welding piece and separate it from the second electrode when tripping.

[0007] Preferably, the second electrode sheet is provided with electrode sheet leads, which are welded to the welding sheet.

[0008] Preferably, the welding piece includes a first connecting piece and a second connecting piece connected to the first connecting piece. The first connecting piece is connected to the tripping assembly. The electrode pins are soldered through the first connecting piece. The first connecting piece has through holes for the electrode pins to pass through. The second connecting piece is located on the side of the first connecting piece away from the varistor. The second connecting piece is electrically connected to the pin spring B through braided copper wire.

[0009] Preferably, the tripping assembly includes a sliding plate slidably disposed on the side of the inner shell away from the varistor, the first connecting piece being connected to the sliding plate, and the elastic element being disposed between the sliding plate and the inner shell, for pulling the sliding plate to move the first connecting piece and separate it from the electrode pin during tripping.

[0010] Preferably, the elastic element includes a spring for pulling the sliding plate to move the first connecting piece away from the electrode pin when the trip is triggered. The spring extends in a direction parallel to the sliding direction of the sliding plate. One end of the spring is disposed on the sliding plate, and the other end is disposed on the inner shell.

[0011] Preferably, the surge protector further includes a housing, wherein the inner housing, the varistor, and the tripping assembly are all located inside the housing, and a support shell is provided on the side of the inner housing away from the welding piece, the support shell being located inside the housing.

[0012] Preferably, the varistor is square and the side length of the varistor is 34mm.

[0013] Preferably, memory metal sheets are provided on opposite sides of the electrode pins, and the arrangement direction of the two memory metal sheets is parallel to the width direction of the through hole. The memory metal sheets are located on the side of the first connecting piece away from the varistor. The initial state of the memory metal sheets is a bent state. When the memory metal sheets stretch into a straight state under the increase of temperature, the distance between the two memory metal sheets at one end is less than the width of the through hole.

[0014] Preferably, the shape memory metal sheet reaches the deformation temperature when the electrode pin temperature reaches the tripping temperature.

[0015] In summary, the present invention has the following beneficial technical effects: When electrical equipment generates a surge current or voltage due to lightning, switch operation, equipment failure, or other reasons, the varistor heats up, causing the temperature of the second electrode to rise. Then, the solder between the second electrode and the welding piece melts. Under the traction of the elastic element, the tripping assembly moves the welding piece towards the surge protector's connector, separating the welding piece from the second electrode, thus tripping and disconnecting the power. In this invention, the tripping point formed by the welding piece and the second electrode is located on the side of the varistor, allowing for a more compact design of the varistor, inner shell, and tripping assembly, reducing the surge protector's thickness to 9.8mm. This reduces the required installation space, meeting the standard requirement that the surge protector's thickness not exceed 10mm for single-piece circuit breaker slot width design. Attached Figure Description

[0016] Figure 1 This is the first exploded view of the overall structure of Embodiment 1 of the present invention.

[0017] Figure 2 This is a second exploded view of the overall structure of Embodiment 1 of the present invention.

[0018] Figure 3 This is a partial exploded view of the structure of Embodiment 1 of the present invention.

[0019] Figure 4 This is a partial structural schematic diagram of Embodiment 1 of the present invention.

[0020] Figure 5 This is a partial structural cross-sectional view of Embodiment 2 of the present invention.

[0021] Figure 6 yes Figure 5 Enlarged view of section A.

[0022] Explanation of reference numerals in the attached drawings: 1. Inner shell; 2. Varistor; 3. First electrode plate; 4. Second electrode plate; 5. Welding plate; 51. First connecting plate; 52. Second connecting plate; 6. Outer shell; 7. Electrode plate pin; 8. Through hole; 9. Sliding plate; 10. Spring; 11. Support shell; 12. Memory metal plate; 13. Varistor mounting groove; 14. Tripping assembly mounting groove; 15. Connecting ear; 16. Braided copper wire. Detailed Implementation

[0023] The following combination Figures 1-6 The present invention will be described in further detail below.

[0024] Example 1: This invention discloses a blade-type 1U surge protector. (Refer to...) Figure 1 and Figure 2 The blade-type 1U surge protector includes a housing 6, an inner housing 1, a varistor 2, and a tripping assembly. The housing 6 is composed of two housings assembled together, with the inner housing 1 fixedly installed inside the housing 6. One side of the inner housing 1 has a varistor mounting groove 13, and the other side has a tripping assembly mounting groove 14. The varistor 2 is installed in the varistor mounting groove 13. The varistor 2 is square with a side length of 34mm, a maximum current Imax of 40kA, and a forward voltage of 100V, ensuring a 40kA current flow. The tripping assembly is slidably installed in the tripping assembly mounting groove 14, with the sliding direction of the tripping assembly parallel to the length direction of the inner housing 1, which is parallel to the length of the housing 6. Both the varistor 2 and the tripping assembly are located inside the housing 6.

[0025] Reference Figure 1 and Figure 3 One side of the varistor 2 is welded with a first electrode plate 3, and the other side is welded with a second electrode plate 4. Specifically, the first electrode plate 3 is a high-temperature electrode plate, and the second electrode plate 4 is a low-temperature electrode plate. The first electrode plate 3 is located on the side of the varistor 2 near the bottom wall of the varistor mounting groove 13, and is used for electrical connection with the pin spring A. The tripping assembly is provided with a welding piece 5, which is located on one side of the varistor 2 along the length of the inner shell 1. Specifically, the welding piece 5 is located on the side of the varistor 2 near the surge protector plug terminal. The plug end of the surge protector refers to the end where the plug spring A and plug spring B are located in the surge protector; the second electrode plate 4 has an integrally formed electrode plate pin 7 on the side near the plug end of the surge protector. The electrode plate pin 7 is inverted L-shaped and is welded to the welding plate 5 to form a tripping point. The welding plate 5 is used to electrically connect with the plug spring B; an elastic element is provided between the tripping assembly and the inner shell 1. The elastic element is used to pull the tripping assembly to move the welding plate 5 and separate it from the electrode plate pin 7 of the second electrode plate 4 when tripping.

[0026] When electrical equipment generates a surge current or voltage due to lightning, switch operation, equipment failure, etc., the varistor 2 heats up, causing the temperature of the second electrode plate 4 and the electrode plate pin 7 to rise. When the temperature rises to the point where the solder between the electrode plate pin 7 and the solder piece 5 melts, under the traction of the elastic element, the tripping assembly moves the solder piece 5 toward the direction closer to the surge protector's plug-in end, causing the solder piece 5 to separate from the electrode plate pin 7, thus achieving tripping and power disconnection. In this invention, the tripping point formed by the solder piece 5 and the electrode plate pin 7 is set on the side of the varistor 2, which can further make the varistor 2, inner shell 1, and tripping assembly more compact, reducing the thickness of the surge protector to 9.8mm. This reduces the required installation space for the protector, meeting the standard requirement that the thickness of the surge protector should not exceed 10mm according to the design of the slot width of a single-piece circuit breaker, allowing the size of the surge protector to be adapted to the size of a single-piece circuit breaker.

[0027] Reference Figure 2 and Figure 3 The tripping assembly includes a sliding plate 9, which is slidably disposed in the tripping assembly mounting groove 14. The inner shell 1 extends from the side of the sliding plate 9 near the surge protector plug-in end. The welding piece 5 is fixedly connected to the side of the sliding plate 9 near the surge protector plug-in end. Connecting ears 15 are integrally formed on opposite sides of the end of the sliding plate 9 away from the welding piece 5. An elastic element is disposed between the connecting ears 15 on the sliding plate 9 and the inner shell 1, which is used to pull the sliding plate 9 to move the welding piece 5 and separate it from the electrode pin 7 on the second electrode piece 4 when tripping.

[0028] Reference Figure 2 and Figure 3 To facilitate the movement of the welding piece 5 by the traction sliding plate 9 during tripping, so that the welding piece 5 is separated from the electrode pin 7, the elastic element includes a spring 10. The spring 10 corresponds one-to-one with the connecting ear 15. The spring 10 is located on the side of the corresponding connecting ear 15 near the surge protector plug end. The extension direction of the spring 10 is parallel to the sliding direction of the sliding plate 9. One end of the spring 10 is fixed on the corresponding connecting ear 15, and the other end is fixed on the inner wall of the tripping assembly mounting groove 14.

[0029] When the surge protector is working normally, the electrode pin 7 is soldered to the solder pad 5 to fix the sliding plate 9 relatively. At this time, the spring 10 is in a stretched state, so that the sliding plate 9 always tends to move towards the surge protector's plug-in end. When the temperature of the second electrode 4 and the electrode pin 7 rises to the point that the solder between the electrode pin 7 and the solder pad 5 melts, the stretched spring 10 pulls the sliding plate 9, causing the sliding plate 9 to move the solder pad 5 towards the surge protector's plug-in end, thereby separating the solder pad 5 from the electrode pin 7 and realizing tripping and power disconnection.

[0030] Reference Figure 2 and Figure 3 Specifically, the welding piece 5 includes a first connecting piece 51 and a second connecting piece 52. The first connecting piece 51 is fixedly connected to the side of the sliding plate 9 near the surge protector plug-in end. The first connecting piece 51 is located on the side of the inner shell 1 and the varistor 2 near the surge protector plug-in end. The plane of the first connecting piece 51 is perpendicular to the length direction of the outer shell 6. The electrode pin 7 is soldered to the first connecting piece 51. The second connecting piece 52 is fixed to the side of the first connecting piece 51 away from the varistor 2. The plane of the second connecting piece 52 is parallel to the length direction of the outer shell 6. The second connecting piece 52 is electrically connected to the pin spring B through the braided copper wire 16.

[0031] The welding piece 5 is designed as two parts: a first connecting piece 51 and a second connecting piece 52. This facilitates connection with the electrode pin 7 and the spring contact B, respectively. This helps to reduce the thickness of the structure and the required installation space for the surge protector. This achieves the standard requirement that the thickness of the surge protector should not exceed 10mm according to the design of the slot width of a single circuit breaker.

[0032] Reference Figure 3 and Figure 4 The electrode pins 7 are soldered to the first connecting piece 51. The first connecting piece 51 has a through hole 8 for the electrode pins 7 to pass through near the surge protector's connector. Due to structural thickness limitations, the soldering surface is small; therefore, the through-soldering connection between the electrode pins 7 and the first connecting piece 51 ensures welding strength. Simultaneously, positioning the electrode pins 7 and the solder piece 5 on the side of the varistor 2 and inner shell 1 near the surge protector's connector helps ensure stable performance of the surge protector under line fault or operational load testing. In other embodiments, the electrode pins 7 and the first connecting piece 51 can be connected by surface mounting.

[0033] Reference Figure 2 Specifically, the surge protector of the present invention has a length of 178.5 mm. A support shell 11 is fixed on the side of the inner shell 1 away from the welding piece 5. The support shell 11 is located between the two shells of the outer shell 6. As the length of the surge protector increases, the support shell 11 can support the side of the outer shell 6 away from the plug end, preventing the outer shell 6 of the surge protector from deformation.

[0034] The implementation principle of Embodiment 1 of this invention is as follows: When electrical equipment generates a peak current or voltage due to lightning, switching operation, equipment failure, etc., the varistor 2 heats up, causing the temperature of the second electrode plate 4 and the electrode plate pin 7 to rise. When the temperature rises to the point that the solder between the electrode plate pin 7 and the welding plate 5 melts, under the pulling action of the spring 10, the sliding plate 9 drives the welding plate 5 to move towards the surge protector plug-in end, causing the first connecting piece 51 to separate from the electrode plate pin 7, thereby achieving tripping and power disconnection. In this invention, the tripping point formed by the welding plate 5 and the electrode plate pin 7 is set on the side of the varistor 2 and the inner shell 1. The structure is novel and can further make the varistor 2, the inner shell 1 and the tripping assembly more compact, reducing the thickness of the surge protector to 9.8mm. This reduces the installation space required for the surge protector and meets the standard requirement that the thickness of the surge protector should not exceed 10mm according to the design of the slot width of a single circuit breaker, thus meeting the installation height requirements of the DC power distribution unit and expansion unit 1U of the switching power supply system.

[0035] Example 2: Reference Figure 5 and Figure 6 The difference between this embodiment and Embodiment 1 is that a memory metal sheet 12 is fixed on opposite sides of the electrode pin 7 away from the varistor 2. The arrangement direction of the two memory metal sheets 12 is parallel to the width direction of the through hole 8. The memory metal sheets 12 extend along the length direction of the through hole 8. The memory metal sheets 12 are located on the side of the first connecting piece 51 away from the varistor 2. The initial state of the memory metal sheet 12 is a bent state, so that when the electrode pin 7 and the first connecting piece 51 are soldered together, the memory metal sheets 12 can be soldered together. The bent setting of the memory metal sheet 12 increases the contact area with the solder and improves the welding effect between the electrode pin 7 and the first connecting piece 51.

[0036] Reference Figure 5 and Figure 6 The shape memory metal sheet 12 is tilted, with the side of the shape memory metal sheet 12 away from the electrode pin 7 tilted towards the varistor 2. When the temperature of the electrode pin 7 reaches the tripping temperature, the shape memory metal sheet 12 reaches the deformation temperature. When the shape memory metal sheet 12 extends into a straight state at high temperature, the distance between the two shape memory metal sheets 12 at their opposite ends is less than the width of the through hole 8, so that the shape memory metal sheet 12 will not interfere with the first connecting piece 51 after extending into a straight state. Specifically, after the shape memory metal sheet 12 extends at high temperature, there is a very small gap between it and the inner wall of the through hole 8, so that when the electrode pin 7 is tripped from the first connecting piece 51, the shape memory metal sheet 12 can scrape away the molten solder.

[0037] Reference Figure 5 and Figure 6The shape memory metal sheet 12 is made of a specially treated nickel-titanium alloy sheet, which makes its transformation temperature close to the melting temperature of tin.

[0038] The implementation principle of Embodiment 2 of the present invention is as follows: When the electrode pin 7 is soldered to the first connecting piece 51, the solder will solder the memory metal piece 12 together, increasing the welding stability of the electrode pin 7 and the first connecting piece 51. As the temperature drops, the memory metal piece 12 is in a bent state. When the temperature of the electrode pin 7 rises to the point that the soldering position gradually melts, the memory metal piece 12 gradually deforms and stretches straight. When the sliding plate 9 drives the welding piece 5 to move away from the electrode pin 7, the memory metal piece 12 slides relative to the inner wall of the through hole 8, scraping off the molten solder, which helps to prevent the molten solder from sticking together and can ensure tripping and power disconnection in a narrow space.

[0039] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A blade-type 1U surge protector, characterized in that: The device includes an inner shell (1), a varistor (2), and a tripping assembly. The varistor (2) is disposed on one side of the inner shell (1), and the tripping assembly is slidably disposed on the other side of the inner shell (1). The sliding direction of the tripping assembly is parallel to the length direction of the inner shell (1). A first electrode plate (3) is disposed on one side of the varistor (2), and a second electrode plate (4) is disposed on the other side. The first electrode plate (3) is used to electrically connect with the pin spring A. The tripping assembly is provided with a welding piece (5). The welding piece (5) is located on one side of the varistor (2) along the length direction of the inner shell (1). The second electrode plate (4) is welded to the welding piece (5) to form a tripping point. The welding piece (5) is used to electrically connect with the pin spring B. An elastic element is disposed between the tripping assembly and the inner shell (1). The element is used to pull the tripping assembly to move the welding piece (5) and separate it from the second electrode piece (4) when the tripping occurs. The second electrode piece (4) is provided with electrode pins (7). The welding piece (5) includes a first connecting piece (51) and a second connecting piece (52) connected to the first connecting piece (51). The first connecting piece (51) is connected to the tripping assembly. The first connecting piece (51) has a through hole (8) for the electrode pins (7) to pass through. Memory metal pieces (12) are provided on opposite sides of the electrode pins (7). The memory metal pieces (12) are initially in a bent state. When the memory metal pieces (12) stretch into a straight state under increased temperature, the distance between the two memory metal pieces (12) at one end is less than the width of the through hole (8).

2. The blade-type 1U surge protector according to claim 1, characterized in that: The electrode pins (7) are welded to the welding plate (5).

3. A blade-type 1U surge protector according to claim 2, characterized in that: The electrode pins (7) are soldered through the first connecting piece (51), and the second connecting piece (52) is located on the side of the first connecting piece (51) away from the varistor (2). The second connecting piece (52) is electrically connected to the pin spring B through a braided copper wire (16).

4. A blade-type 1U surge protector according to claim 3, characterized in that: The tripping assembly includes a sliding plate (9) slidably disposed on the side of the inner shell (1) away from the varistor (2), the first connecting piece (51) is connected to the sliding plate (9), and the elastic element is disposed between the sliding plate (9) and the inner shell (1) for pulling the sliding plate (9) to move the first connecting piece (51) and separate it from the electrode pin (7) when tripping.

5. A blade-type 1U surge protector according to claim 4, characterized in that: The elastic element includes a spring (10) for pulling the sliding plate (9) to move the first connecting piece (51) away from the electrode pin (7) when the trip is triggered. The extension direction of the spring (10) is parallel to the sliding direction of the sliding plate (9). One end of the spring (10) is disposed on the sliding plate (9), and the other end is disposed on the inner shell (1).

6. A blade-type 1U surge protector according to claim 1, characterized in that: The surge protector also includes a housing (6), the inner housing (1), the varistor (2) and the tripping assembly are all located inside the housing (6), and a support shell (11) is provided on the side of the inner housing (1) away from the welding piece (5), and the support shell (11) is located inside the housing (6).

7. A blade-type 1U surge protector according to any one of claims 1-6, characterized in that: The varistor (2) is square and has a side length of 34 mm.

8. A blade-type 1U surge protector according to claim 3, characterized in that: The two memory metal sheets (12) are arranged in a direction parallel to the width direction of the through hole (8), and the memory metal sheets (12) are located on the side of the first connecting piece (51) away from the varistor (2).

9. A blade-type 1U surge protector according to claim 8, characterized in that: When the temperature of the electrode pin (7) reaches the tripping temperature, the memory metal sheet (12) reaches the deformation temperature.

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