Surge protection device with self-checking function

Abstract

The utility model discloses a surge protection device with a self-checking function, which relates to the field of electrical technology and comprises a shell, a protector main body, a heat-conducting fin, a shell, a warning lamp, an expansion block, a first warning component and a second warning component. According to the utility model, when long-time or interval transient overvoltage passes through some components in the protector due to lightning stroke or other reasons, the components generate heat, the heat is transmitted to the heat-conducting fin at the upper end in the shell through the heat-conducting fin arranged in the components, and the expansion block expands when heated, so that the components are prevented from being damaged. The expansion block expands to drive the first warning component and the second warning component to work so as to remind a worker of unfavorable conditions, so that production, test or other important work can be stopped in time, the purpose of automatic detection is achieved, and loss is reduced.

Description

Technical Field

[0001] The utility model relates to the field of electrical technology, in particular to a surge protector with a self-checking function. Background Art

[0002] The main function of a surge protector (SPD) is to protect electrical equipment and electronic systems from transient overvoltages (i.e., surges). In power systems, transient overvoltages are generated due to lightning strikes, switching operations, load mutations, etc. These overvoltages may damage the insulation and semiconductor components of the equipment, and even cause equipment failure or fire. Surge protectors can quickly respond to and suppress these transient overvoltages through their internal nonlinear components, such as zinc oxide varistors and gas discharge tubes, and guide surge currents to the ground wire or other safe grounding points, thereby ensuring that the protected electrical equipment and electronic systems can operate normally, extending their service life, and improving the overall reliability of the system.

[0003] At present, when a surge protector faces a strong lightning strike, the surge protector will immediately activate the built-in fuse, and by cutting off the circuit, it effectively prevents the lightning current from continuing to flow to the equipment in the circuit, thereby avoiding further damage to the circuit.

[0004] However, many surge protectors on the market generally lack automatic detection and early warning mechanisms. This results in the fuse disconnecting action often without warning when a surge occurs. For some important places such as factories or experiments, sudden power outages may seriously disrupt their normal production order or important processes such as experiments, thereby causing great losses. Utility Model Content

[0005] The purpose of the utility model is to provide a surge protector with a self-checking function to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] Surge protector with self-test function, including:

[0008] The outer shell has a protector body disposed inside, a shell is disposed inside the outer shell, the shell is fixedly connected to the outer shell, a warning light is disposed at the bottom of the inner shell, and an observation window is provided on the outer shell;

[0009] The heat conducting plate is located at the upper end of the shell, an expansion block is arranged below the heat conducting plate, a first warning component for alarm is arranged below the expansion block, and a second warning component for alarm is arranged on one side of the first warning component.

[0010] When lightning strikes or other reasons cause long-term or intermittent transient overvoltages to pass through some components in the protector, the components will generate heat, and the heat will be transferred to the heat conducting plate at the upper end of the shell through the internal heat conducting plate. At this time, the expansion block will expand due to heat, and the expansion of the expansion block will drive the first warning component and the second warning component to work, thereby prompting the staff that an adverse situation has occurred. In this way, production, testing or other important work can be stopped in time, the purpose of automatic detection can be achieved, and thus the loss can be reduced.

[0011] A further improvement of the technical solution of the utility model is that: the first warning component includes a cylinder body, a support plate is slidably connected to the cylinder body, a connecting rod is fixedly connected to the side of the support plate close to the expansion block, a pressure plate is fixedly connected to the end of the connecting rod away from the support plate, the pressure plate and the heat conducting plate are used in conjunction with the expansion block, the connecting rod is slidably connected to the cylinder body, a pressure spring is fixedly connected to the side of the support plate close to the connecting rod, the other end of the pressure spring is fixedly connected to the cylinder body, an air inlet pipe and an air outlet pipe are respectively arranged on the cylinder body, a one-way valve is arranged inside the air inlet pipe and the air outlet pipe, and a whistle is arranged at the outlet of the air outlet pipe.

[0012] The above-mentioned technical scheme is adopted. In this scheme, when the expansion block is heated, the expansion block will expand and press the pressure plate downward. At this time, the pressure spring is in a stretched state. The pressure plate will drive the support plate fixed to it to move downward and squeeze the air inside the cylinder body, so that the air flows out from the air outlet of the cylinder body. When flowing out, the air will pass through the whistle, thereby driving the whistle to work and emit a sound prompt, thereby achieving the purpose of the alarm. When the expansion block is reset, the pressure spring is reset, the support plate moves upward, and the external air is input through the air inlet.

[0013] A further improvement of the technical solution of the utility model is that: the second warning component includes a box body, the box body is fixedly connected to the outer shell, a support rod is fixedly connected below the pressure plate, the support rod is slidably connected to the cylinder body and the shell respectively, a first movable plate is provided at the other end of the support rod, the first movable plate is slidably connected to the box body, an elastic spring is fixedly connected below the first movable plate, the other end of the elastic spring is fixedly connected to the second movable plate, the second movable plate is slidably connected to the box body, a switch button is provided at the bottom end of the box body, and the switch button is electrically connected to the warning light.

[0014] The above-mentioned technical solution is adopted. In this solution, when the pressure plate moves downward, the pressure plate will drive the connecting rod to move together. At this time, with the cooperation of the first movable plate, the elastic spring and the second movable plate, the second movable plate will first squeeze the switch button, and the warning light will turn on. Then when the pressure plate moves downward again, the elastic spring will be compressed; when the expansion block shrinks, the pressure plate rises until the second movable plate leaves the switch button and the warning light turns off. This setting can achieve that when the expansion block is heated, the warning light will always be in a normally on state, thereby achieving the purpose of alarm.

[0015] A further improvement of the technical solution of the utility model is that a reinforcing rib is arranged between the support rod and the first movable plate, and the reinforcing rib is fixedly connected to the support rod and the first movable plate respectively.

[0016] By adopting the above technical solution, reinforcing ribs are provided between the support rod and the first movable plate to enhance the structural strength, thereby improving the rigidity and stability of the overall structure.

[0017] A further improvement of the technical solution of the utility model is that a rubber sealing layer is provided on the surface of the support plate away from the connecting rod.

[0018] The above technical solution is adopted, in which a rubber sealing layer is provided on the surface of the support plate away from the connecting rod to protect the air tightness inside the cylinder body and prevent inaccurate automatic detection results of the device due to loose air tightness.

[0019] A further improvement of the technical solution of the utility model is that a filter screen is arranged at the air inlet of the cylinder body.

[0020] The above technical solution is adopted, in which a filter is provided to prevent dust from entering, thereby causing the inside of the whistle to be blocked by accumulated dust, thereby causing damage to the device.

[0021] A further improvement of the technical solution of the utility model is that the material of the heat conducting sheet is copper.

[0022] The above technical solution is adopted. In this solution, the material of the heat conducting sheet is set to copper because copper has the characteristics of good thermal conductivity and strong corrosion resistance, thereby extending the service life of the heat conducting sheet.

[0023] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0024] 1. The utility model provides a surge protector with a self-checking function. When a long-term or intermittent transient overvoltage passes through some components in the protector due to lightning strikes or other reasons, the components will generate heat, and the heat will be transferred to the heat conducting sheet at the upper end of the shell through the internal heat conducting sheet. At this time, the expansion block will expand when heated, and the expansion of the expansion block will drive the first warning component and the second warning component to work, thereby prompting the staff that an adverse situation has occurred. In this way, production, testing or other important work can be stopped in time, and the purpose of automatic detection can be achieved, thereby reducing losses.

[0025] 2. The utility model provides a surge protector with a self-checking function. When the expansion block is heated, the expansion block will expand and press the pressure plate downward. At this time, the pressure spring is in a stretched state. The pressure plate will drive the support plate fixedly connected thereto to move downward and squeeze the air inside the cylinder body, so that the air flows out from the air outlet of the cylinder body. When flowing out, the air will pass through the whistle, thereby driving the whistle to work and emit a sound prompt, thereby achieving the purpose of the alarm. When the expansion block is reset, the pressure spring is reset, the support plate moves upward, and the external air is input through the air inlet.

[0026] 3. The utility model provides a surge protector with a self-checking function. When the pressure plate moves downward, the pressure plate will drive the connecting rod to move together. At this time, with the cooperation of the first movable plate, the elastic spring and the second movable plate, the second movable plate will first squeeze the switch button. At this time, the warning light is turned on. Then, when the pressure plate moves downward again, the elastic spring will be compressed. When the expansion block shrinks, the pressure plate rises until the second movable plate leaves the switch button and the warning light is turned off. This arrangement can ensure that when the expansion block is heated, the warning light will always be in a normally on state, thereby achieving the purpose of alarm. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The utility model is further described below in conjunction with the accompanying drawings.

[0028] Figure 1 This is a first structural schematic diagram of the utility model;

[0029] Figure 2 It is a second structural schematic diagram of the utility model;

[0030] Figure 3 It is a schematic diagram of the first cross-sectional structure of the utility model;

[0031] Figure 4 It is a schematic diagram of the second cross-sectional structure of the utility model;

[0032] Figure 5 It is a schematic diagram of the enlarged structure of point A of the utility model;

[0033] Figure 6 It is a schematic diagram of the enlarged structure of point B of the utility model.

[0034] In the figure: 1. outer shell; 2. shell body; 3. protector body; 4. warning light; 5. heat conductive sheet; 6. expansion block; 7. cylinder body; 8. support plate; 9. connecting rod; 10. pressure plate; 11. pressure spring; 12. air inlet pipe; 13. air outlet pipe; 14. box body; 15. support rod; 16. first movable plate; 17. elastic spring; 18. second movable plate; 19. switch button; 20. reinforcing rib; 21. rubber sealing layer. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with the embodiments:

[0036] Example

[0037] like Figure 1 , Figure 2 As shown, the utility model provides a surge protector with a self-checking function, comprising:

[0038] A housing 1, a protector body 3 is arranged inside the housing 1, a shell 2 is arranged inside the housing 1, the shell 2 is fixedly connected to the housing 1, a warning light 4 is arranged at the bottom of the housing 1, and an observation window is opened on the housing 1;

[0039] The heat conducting sheet 5 is located at the upper end of the shell 2, an expansion block 6 is arranged below the heat conducting sheet 5, a first warning component for alarm is arranged below the expansion block 6, and a second warning component for alarm is arranged on one side of the first warning component.

[0040] In this embodiment, when lightning strikes or other reasons cause long-term or intermittent transient overvoltages to pass through some components in the protector, the components will generate heat, and the heat will be transferred to the heat conducting sheet 5 at the upper end of the shell 2 through the internal heat conducting sheet 5. At this time, the expansion block 6 will expand due to heat, and the expansion of the expansion block 6 will drive the first warning component and the second warning component to work, thereby reminding the staff that an adverse situation has occurred. In this way, production, testing or other important work can be stopped in time, the purpose of automatic detection can be achieved, and losses can be reduced.

[0041] like Figure 3 , Figure 4 , Figure 6 As shown, in the present embodiment, preferably, the first warning component includes a cylinder body 7, a support plate 8 is slidably connected inside the cylinder body 7, a connecting rod 9 is fixedly connected to the side of the support plate 8 close to the expansion block 6, a pressure plate 10 is fixedly connected to the end of the connecting rod 9 away from the support plate 8, the pressure plate 10 and the heat conducting plate 5 are used in conjunction with the expansion block 6, the connecting rod 9 is slidably connected to the cylinder body 7, a pressure spring 11 is fixedly connected to the side of the support plate 8 close to the connecting rod 9, the other end of the pressure spring 11 is fixedly connected to the cylinder body 7, an air inlet pipe 12 and an air outlet pipe 13 are respectively provided on the cylinder body 7, a one-way valve is provided inside the air inlet pipe 12 and the air outlet pipe 13, and a whistle is provided at the outlet of the air outlet pipe 13.

[0042] When the expansion block 6 is heated, the expansion block 6 will expand and press the pressure plate 10 downward. At this time, the pressure spring 11 is in a stretched state. The pressure plate 10 will drive the support plate 8 fixedly connected thereto to move downward and squeeze the air inside the cylinder 7, so that the air flows out from the air outlet of the cylinder 7. When the air flows out, it will pass through the whistle, thereby driving the whistle to work and emit a sound prompt, thereby achieving the purpose of the alarm. When the expansion block 6 is reset, the pressure spring 11 is reset, the support plate 8 moves upward, and the external air is input through the air inlet.

[0043] like Figure 3 , Figure 5 As shown, preferably, the second warning component includes a box body 14, the box body 14 is fixedly connected to the outer shell 1, a support rod 15 is fixedly connected below the pressure plate 10, the support rod 15 is slidably connected to the cylinder body 7 and the shell 2 respectively, a first movable plate 16 is provided at the other end of the support rod 15, the first movable plate 16 is slidably connected to the box body 14, an elastic spring 17 is fixedly connected below the first movable plate 16, the other end of the elastic spring 17 is fixedly connected to a second movable plate 18, the second movable plate 18 is slidably connected to the box body 14, a switch button 19 is provided at the bottom end of the box body 14, and the switch button 19 is electrically connected to the warning light 4.

[0044] When the pressure plate 10 moves downward, the pressure plate 10 will drive the connecting rod 9 to move together. At this time, with the cooperation of the first movable plate 16, the elastic spring 17 and the second movable plate 18, the second movable plate 18 will first squeeze the switch button 19. At this time, the warning light 4 is turned on. Then, when the pressure plate 10 moves downward again, the elastic spring 17 will be compressed. When the expansion block 6 shrinks, the pressure plate 10 rises until the second movable plate 18 leaves the switch button 19 and the warning light 4 is turned off. This arrangement can achieve that when the expansion block 6 is heated, the warning light 4 will always be in a normally on state, thereby achieving the purpose of alarm.

[0045] like Figure 5 As shown, preferably, a reinforcing rib 20 is provided between the support rod 15 and the first movable plate 16 , and the reinforcing rib 20 is fixedly connected to the support rod 15 and the first movable plate 16 , respectively.

[0046] By providing the reinforcing ribs 20 between the support rod 15 and the first movable plate 16 , the structural strength can be enhanced, thereby improving the rigidity and stability of the overall structure.

[0047] like Figure 6 As shown, preferably, a rubber sealing layer 21 is provided on the surface of the support plate 8 away from the connecting rod 9 .

[0048] The rubber sealing layer 21 is provided on the surface of the support plate 8 away from the connecting rod 9 in order to protect the air tightness inside the cylinder body 7 and prevent the automatic detection result of the device from being inaccurate due to the loose air tightness.

[0049] like Figure 3 As shown, preferably, a filter screen is provided at the air inlet of the cylinder body 7.

[0050] The filter can be provided to prevent dust from entering and clogging the inside of the whistle with accumulated dust, thereby causing damage to the device.

[0051] like Figure 4 As shown, preferably, the material of the heat conducting sheet 5 is copper.

[0052] The heat conducting sheet 5 is made of copper because copper has the characteristics of good thermal conductivity and strong corrosion resistance, thereby extending the service life of the heat conducting sheet 5 .

[0053] The following is a detailed description of the working principle of the surge protector with self-test function.

[0054] like Figure 1-6As shown, when lightning strikes or other reasons cause some components in the protector to have long-term or intermittent transient overvoltages, the components will heat up, and the heat will be transferred to the heat conducting sheet 5 at the upper end of the shell 2 through the internal heat conducting sheet 5. At this time, the expansion block 6 will expand when it encounters heat, and the expansion of the expansion block 6 will drive the first warning component and the second warning component to work, thereby prompting the staff that an unfavorable situation has occurred, so that production, testing or other important work can be stopped in time, achieving the purpose of automatic detection, thereby reducing losses. When the expansion block 6 is heated, the expansion block 6 will expand and press the pressure plate 10 downward. At this time, the pressure spring 11 is in a stretched state. The pressure plate 10 will drive the support plate 8 fixedly connected thereto to move downward and squeeze the air inside the cylinder 7, so that the air flows out from the air outlet of the cylinder 7. When the air flows out, it will pass through the whistle, thereby driving the whistle to work and emit a sound prompt, thereby achieving the purpose of alarming. When the expansion block 6 is reset, the pressure spring 11 is reset, and the support plate 8 moves upward to input the external air through the air inlet. When the pressing plate 10 moves downward, the pressing plate 10 will drive the connecting rod 9 to move together. At this time, under the cooperation of the first movable plate 16, the elastic spring 17 and the second movable plate 18, the second movable plate 18 will first squeeze the switch button 19, and the warning light 4 will turn on. Then when the pressing plate 10 moves downward again, the elastic spring 17 will be compressed. When the expansion block 6 shrinks, the pressing plate 10 rises until the second movable plate 18 leaves the switch button 19, and the warning light 4 is turned off. This setting can achieve that when the expansion block 6 is heated, the warning light 4 will always be in a constant light state, thereby achieving the purpose of alarm. By providing a reinforcing rib 20 between the support rod 15 and the first movable plate 16, the structural strength can be enhanced, thereby improving the rigidity and stability of the overall structure. By providing a rubber sealing layer 21 on the surface of the support plate 8 away from the connecting rod 9, it is to protect the air tightness in the cylinder 7 and prevent the automatic detection result of the device from being inaccurate due to the lax air tightness. By providing a filter, dust can be prevented from entering, thereby causing the whistle to be blocked by accumulated dust inside, thereby causing damage to the device. The heat conducting sheet 5 is made of copper because copper has the characteristics of good thermal conductivity and strong corrosion resistance, thereby extending the service life of the heat conducting sheet 5 .

[0055] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A surge protector with a self-checking function, characterized in that: include: A housing (1), wherein a protector body (3) is arranged inside the housing (1), a shell (2) is arranged inside the housing (1), the shell (2) is fixedly connected to the housing (1), a warning light (4) is arranged at the bottom end of the housing (1), and an observation window is opened on the housing (1); A heat conducting sheet (5), the heat conducting sheet (5) being located at the upper end of the housing (2), an expansion block (6) being arranged below the heat conducting sheet (5), a first warning component for alarming being arranged below the expansion block (6), and a second warning component for alarming being arranged on one side of the first warning component.

2. The surge protector with self-test function according to claim 1, characterized in that: The first warning component comprises a cylinder body (7), a support plate (8) is slidably connected inside the cylinder body (7), a connecting rod (9) is fixedly connected to the side of the support plate (8) close to the expansion block (6), a pressure plate (10) is fixedly connected to the end of the connecting rod (9) away from the support plate (8), the pressure plate (10) and the heat conducting plate (5) are used in conjunction with the expansion block (6), the connecting rod (9) is slidably connected to the cylinder body (7), a pressure spring (11) is fixedly connected to the side of the support plate (8) close to the connecting rod (9), the other end of the pressure spring (11) is fixedly connected to the cylinder body (7), an air inlet pipe (12) and an air outlet pipe (13) are respectively arranged on the cylinder body (7), a one-way valve is arranged inside the air inlet pipe (12) and the air outlet pipe (13), and a whistle is arranged at the outlet of the air outlet pipe (13).

3. The surge protector with self-checking function according to claim 2, characterized in that: The second warning component comprises a box body (14), the box body (14) is fixedly connected to the outer shell (1), a support rod (15) is fixedly connected below the pressure plate (10), the support rod (15) is slidably connected to the cylinder body (7) and the shell (2) respectively, a first movable plate (16) is arranged at the other end of the support rod (15), the first movable plate (16) is slidably connected to the box body (14), an elastic spring (17) is fixedly connected below the first movable plate (16), the other end of the elastic spring (17) is fixedly connected to the second movable plate (18), the second movable plate (18) is slidably connected to the box body (14), a switch button (19) is arranged at the bottom end of the box body (14), and the switch button (19) is electrically connected to the warning light (4).

4. The surge protector with self-checking function according to claim 3, characterized in that: A reinforcing rib (20) is provided between the support rod (15) and the first movable plate (16), and the reinforcing rib (20) is fixedly connected to the support rod (15) and the first movable plate (16) respectively.

5. The surge protector with self-checking function according to claim 4, characterized in that: A rubber sealing layer (21) is provided on the surface of the support plate (8) at a side away from the connecting rod (9).

6. The surge protector with self-checking function according to claim 5, characterized in that: A filter screen is arranged at the air inlet of the cylinder body (7).

7. The surge protector with self-checking function according to claim 6, characterized in that: The material of the heat conducting sheet (5) is copper.

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