Lightning protection piezoresistor with explosion-proof function

Abstract

The utility model relates to a lightning protection type piezoresistor with an explosion-proof function, which comprises an explosion-proof box, a resistor body arranged in the explosion-proof box through a fixing mechanism, and two leads arranged on the resistor body, one side of the explosion-proof box is provided with an opening for the leads to pass through, and the other side of the explosion-proof box is provided with an opening for the leads to pass through. The top of the explosion-proof box is in threaded connection with an explosion-proof cover plate, the fixing mechanism comprises a plurality of groups of fixing assemblies arranged in the explosion-proof box, and the resistor body can be suspended and fixed in the explosion-proof box through the arranged fixing mechanism in the use process, so that the pressure generated by an external object on the resistor body can be further reduced, and the explosion-proof effect is improved. And meanwhile, a certain heat dissipation effect can be achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of varistors, and particularly relates to a lightning protection varistor with an explosion-proof function. Background Art

[0002] A varistor refers to a voltage-limiting element that is sensitive to voltage changes. Its characteristics are: at a specified temperature, when the voltage exceeds a certain critical value, its resistance value will decrease sharply, and the current passing through it will increase sharply. The voltage and current are not linearly related. Therefore, the varistor is also known as a non-linear resistor.

[0003] Pressure is one of the main reasons for the explosion of varistors. In some cases, the pressure may exceed the working range, resulting in the explosion of the varistor. Therefore, during the use or transportation of varistors, it is necessary to set a housing to protect the varistor. Referring to the explosion-proof housing of a high heat dissipation varistor with the publication number CN214672050U, although a housing is set during the use of this patent, the varistor body is in close contact with the housing. When the housing is under pressure, the pressure will act on the varistor body, and effective protection cannot be achieved. Content of the Utility Model

[0004] The purpose of the utility model is to provide a lightning protection varistor with an explosion-proof function that has a simple structure and a reasonable design in order to solve the above problems.

[0005] The utility model realizes the above purpose through the following technical solutions:

[0006] A lightning protection varistor with an explosion-proof function includes an explosion-proof box, a resistor body installed in the explosion-proof box through a fixing mechanism, and two leads installed on the resistor body. The fixing mechanism includes multiple groups of fixing components arranged in the explosion-proof box. The fixing component includes a clamping block, a fixing rod installed on one side of the clamping block, and a first spring sleeved outside the fixing rod. Two ends of the first spring are respectively fixedly connected with one side of the clamping block and the inner wall of the explosion-proof box. A fixing groove for cooperating with the resistor body is opened on one side of the clamping block. One end of the fixing rod extends to the outside of the explosion-proof box, and a moving mechanism for driving the fixing rod to move is installed outside the explosion-proof box.

[0007] As a further optimized solution of the utility model, the moving mechanism includes a fixing plate and a winding mechanism installed outside the explosion-proof box, a pulling rope installed on one side of the fixing plate, and connecting holes opened in multiple fixing rods. One end of the pulling rope passes through the multiple connecting holes in sequence and is fixedly connected with the outside of the winding mechanism.

[0008] As a further optimized solution of the utility model, the winding mechanism includes a rotating column rotatably connected to the outside of the explosion-proof box, a winding roller installed on the outside of the rotating column, and a rotating mechanism installed on one side of the rotating column for driving the rotation of the rotating column. One end of the pulling rope is fixedly installed on the outside of the winding roller.

[0009] As a further optimized solution of the utility model, the rotating mechanism includes a rotating rod, a square groove opened inside the rotating column, a square plate slidably connected inside the square groove and having a T-shaped structure, and a second spring installed on the inner wall of the square groove. One end of the second spring is fixedly connected to one side of the square plate, and the other side of the square plate extends to the outside of the rotating column and is fixedly connected to one side of the rotating rod. A limiting mechanism for limiting the rotating rod is installed outside the explosion-proof box.

[0010] As a further optimized solution of the utility model, the limiting mechanism includes a connecting plate installed on one side of the explosion-proof box, and a clamping groove opened on one side of the connecting plate and used in cooperation with the rotating rod.

[0011] As a further optimized solution of the utility model, an explosion-proof cover plate is threadedly connected to the top of the explosion-proof box.

[0012] The beneficial effect of the utility model is that during the use of the utility model, the resistor body can be suspended and fixed in the explosion-proof box through the provided fixing mechanism, which can not only further reduce the pressure generated by external objects on the resistor body, but also play a certain role in heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is the overall structural schematic diagram of the utility model;

[0014] Figure 2 is the partial structural schematic diagram of the utility model;

[0015] Figure 3 is the structural schematic diagram after the installation of the utility model;

[0016] Figure 4 is the Figure 1 enlarged structural schematic diagram at A in the utility model;

[0017] Figure 5 is the Figure 2 enlarged structural schematic diagram at B in the utility model.

[0018] In the figure: 1. Explosion-proof box; 2. Resistor body; 3. Fixed rod; 4. Pulling rope; 5. Lead wire; 6. Explosion-proof cover plate; 7. Fixed plate; 8. Clamping block; 10. Winding roller; 11. Rotating column; 12. Square plate; 13. Rotating rod; 14. Connecting plate; 15. Clamping groove; 16. Second spring; 17. First spring. Detailed implementation manners

[0019] The present application will be further described in detail below with reference to the accompanying drawings. It is necessary to point out here that the following specific implementation manners are only used to further illustrate the present application and should not be construed as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0020] As Figure 1 - Figure 5 shown, a lightning protection varistor with explosion-proof function includes an explosion-proof box 1, a resistor body 2 installed in the explosion-proof box 1 through a fixing mechanism, and two leads 5 installed on the resistor body 2. An opening for the lead 5 to pass through is provided on one side of the explosion-proof box 1. An explosion-proof cover plate 6 is threadedly connected to the top of the explosion-proof box 1. Insulation layers are provided on the inner walls of the explosion-proof box 1 and the explosion-proof cover plate 6, so as to play a certain role in lightning protection. The fixing mechanism includes multiple groups of fixing components arranged in the explosion-proof box 1. The fixing component includes a clamping block 8, a fixing rod 3 installed on one side of the clamping block 8, and a first spring 17 sleeved outside the fixing rod 3. Two ends of the first spring 17 are respectively fixedly connected to one side of the clamping block 8 and the inner wall of the explosion-proof box 1. A fixing groove for cooperating with the resistor body 2 is provided on one side of the clamping block 8. One end of the fixing rod 3 extends to the outside of the explosion-proof box 1. A moving mechanism for driving the fixing rod 3 to move is installed outside the explosion-proof box 1. The moving mechanism includes a fixing plate 7 and a winding mechanism installed outside the explosion-proof box 1, a pulling rope 4 installed on one side of the fixing plate 7, connection holes opened in multiple fixing rods 3, and one end of the pulling rope 4 sequentially passes through the multiple connection holes and is fixedly connected to the outside of the winding mechanism. The winding mechanism includes a rotating column 11 rotatably connected to the outside of the explosion-proof box 1, a winding roller 10 installed on the outside of the rotating column 11, and a rotating mechanism installed on one side of the rotating column 11 for driving the rotating column 11 to rotate. One end of the pulling rope 4 is fixedly installed on the outside of the winding roller 10. The rotating mechanism includes a rotating rod 13, a square groove opened in the rotating column 11, a square plate 12 slidably connected inside the square groove and having a T-shaped structure, and a second spring 16 installed on the inner wall of the square groove. One end of the second spring 16 is fixedly connected to one side of the square plate 12. The other side of the square plate 12 extends to the outside of the rotating column 11 and is fixedly connected to one side of the rotating rod 13. A limiting mechanism for limiting the rotating rod 13 is installed outside the explosion-proof box 1. The limiting mechanism includes a connecting plate 14 installed on one side of the explosion-proof box 1, and a card slot 15 opened on one side of the connecting plate 14 and cooperating with the rotating rod 13. When it is necessary to disassemble the resistor body 2, the rotating mechanism can be rotated. At this time, under the action of the first spring 17, the clamping block 8 will be separated from the resistor body 2, and the resistor body 2 can be taken out.

[0021] It should be noted that for this lightning protection varistor with explosion-proof function, when in use, the resistor body 2 is placed between multiple fixing components. While pulling the rotating rod 13, rotate the rotating rod 13 at the same time. At this time, the rotating column 11 will be driven to rotate. Driven by the rotating column 11, the winding roller 10 will rotate, so as to wind the pulling rope 4 outside the winding roller 10. During the process of winding the pulling rope 4, multiple fixing rods 3 will drive multiple clamping blocks 8 to move towards the side close to the resistor body 2, so that the resistor body is fixed in the multiple clamping blocks 8 under the action of the fixing groove. When the rotating rod 13 rotates to one side of the connecting plate 14, the rotating rod 13 can be placed in the clamping groove 15. Release the rotating rod 13, and the rotating rod 13 can be fixed under the action of the clamping groove 15 to prevent the rotating rod 13 from rotating. Under the action of multiple clamping blocks 8, the resistor body 2 can be suspended and fixed in the explosion-proof box 1. Since the resistor body 2 is suspended, when an external object accumulates on the explosion-proof box 1 or collides with the explosion-proof box 1, the pressure transmitted to the resistor body 2 through the explosion-proof box 1 can be reduced, thus playing a certain explosion-proof role. At the same time, it can also play a certain heat dissipation effect.

[0022] The above-mentioned embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A lightning protection varistor with explosion-proof function, comprising an explosion-proof box (1), a resistor body (2) installed in the explosion-proof box (1) through a fixing mechanism, and two leads (5) installed on the resistor body (2), characterized in that, The fixing mechanism includes a plurality of fixing components arranged inside the explosion-proof box (1). The fixing components include a clamping block (8), a fixing rod (3) installed on one side of the clamping block (8), and a first spring (17) sleeved outside the fixing rod (3). Both ends of the first spring (17) are fixedly connected to one side of the clamping block (8) and the inner wall of the explosion-proof box (1). A fixing groove for cooperating with the resistor body (2) is formed on one side of the clamping block (8). One end of the fixing rod (3) extends to the outside of the explosion-proof box (1), and a moving mechanism for driving the fixing rod (3) to move is installed outside the explosion-proof box (1).

2. The lightning protection varistor with explosion-proof function according to claim 1, characterized in that: The moving mechanism includes a fixing plate (7) and a winding mechanism installed outside the explosion-proof box (1), a pulling rope (4) installed on one side of the fixing plate (7), and connecting holes formed inside a plurality of fixing rods (3). One end of the pulling rope (4) sequentially passes through the plurality of connecting holes and is fixedly connected to the outside of the winding mechanism.

3. The lightning protection varistor with explosion-proof function according to claim 2, characterized in that: The winding mechanism includes a rotating column (11) rotatably connected to the outside of the explosion-proof box (1), a winding roller (10) installed on the outside of the rotating column (11), and a rotating mechanism installed on one side of the rotating column (11) for driving the rotating column (11) to rotate. One end of the pulling rope (4) is fixedly installed on the outside of the winding roller (10).

4. The lightning protection varistor with explosion-proof function according to claim 3, characterized in that: The rotating mechanism includes a rotating rod (13), a square groove formed inside the rotating column (11), a square plate (12) slidably connected inside the square groove and having a T-shaped structure, and a second spring (16) installed on the inner wall of the square groove. One end of the second spring (16) is fixedly connected to one side of the square plate (12). The other side of the square plate (12) extends to the outside of the rotating column (11) and is fixedly connected to one side of the rotating rod (13). A limiting mechanism for limiting the rotating rod (13) is installed outside the explosion-proof box (1).

5. The lightning protection varistor with explosion-proof function according to claim 4, characterized in that: The limiting mechanism includes a connecting plate (14) installed on one side of the explosion-proof box (1), and a clamping groove (15) formed on one side of the connecting plate (14) and cooperating with the rotating rod (13).

6. A lightning protection varistor with explosion-proof function according to claim 1, characterized in that: An explosion-proof cover plate (6) is threadedly connected to the top of the explosion-proof box (1).

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