Explosion-proof piezoresistor

Abstract

The utility model belongs to the technical field of piezoresistors, and particularly relates to an explosion-proof piezoresistor which comprises a resistor shell, an electrode body is arranged on the resistor shell, a coating assembly is arranged between the resistor shell and the electrode body, the coating assembly comprises an outer sleeve pad, a coating sleeve and a first electrode sleeve, the outer side of the resistor shell is fixedly connected with a second electrode sleeve, and the second electrode sleeve is fixedly connected with the outer side of the resistor shell. The second electrode sleeve sleeves the outer side of the electrode body, and the outer sleeve pad sleeves the outer side of the second electrode sleeve; the second electrode sleeve sleeves the outer side of the electrode body, the outer sleeve pad sleeves the outer side of the second electrode sleeve, one side of the coating sleeve is located on the outer side of the outer sleeve pad, the other side of the coating sleeve is located on the outer side of the resistor shell, the electrode body and the resistor shell are in reinforced connection through the second electrode sleeve, and the outer side of the electrode body and the resistor shell is coated with the first electrode sleeve. The first extension edge and the second extension edge of the coating sleeve extend to increase the coverage area, so that the connecting part between the electrode and the shell is reinforced, the sealing effect is improved, and the explosion-proof performance is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of varistor, and in particular relates to an explosion-proof varistor. Background Art

[0002] An explosion-proof varistor is a resistor device with nonlinear volt-ampere characteristics. It is mainly used to clamp voltage when the circuit is subjected to overvoltage and absorb excess current to protect sensitive devices. The resistor body material of the varistor is a semiconductor. A varistor with explosion-proof function can prevent the risk of explosion caused by changes in the external environment. It has a corrosion-resistant and explosion-proof shell material to protect the internal varistor.

[0003] The connection between the electrode and the shell of a varistor usually requires a reliable sealing and connection method to ensure that the internal varistor material is not affected by the external environment. Some varistors use soft sealing materials such as rubber or silicone to seal the connection between the electrode and the shell, which directly extends from the shell and covers the electrode. If the covering position has warped edges, it will directly affect the use of the varistor and reduce the sealing performance. Utility Model Content

[0004] The utility model provides an explosion-proof varistor, which has the characteristics of strengthening the connection part between the electrode and the shell, improving the sealing effect, and further improving the explosion-proof performance.

[0005] The utility model provides the following technical solutions: an explosion-proof varistor, comprising a resistor shell, an electrode body is arranged on the resistor shell, a covering component is arranged between the resistor shell and the electrode body, the covering component comprises an outer sleeve, a covering sleeve and a first electrode sleeve, a second electrode sleeve is fixedly connected to the outside of the resistor shell, the second electrode sleeve is sleeved on the outside of the electrode body, and the outer sleeve is sleeved on the outside of the second electrode sleeve, one side of the covering sleeve is located on the outside of the outer sleeve, and the other side of the covering sleeve is located on the outside of the resistor shell.

[0006] The covering sleeve has a first extended edge and a second extended edge, the first extended edge is fixedly connected to the resistor shell, and the second extended edge is fixedly connected to the outer sleeve pad.

[0007] The outer jacket gasket is fixedly connected to the resistor shell, and the first electrode sleeve is fixed on the outside of the outer jacket gasket.

[0008] Wherein, the first electrode sleeve is provided with an annular groove, and a clamping ring is inserted into the annular groove.

[0009] The first electrode sleeve is provided with a covering cavity, the covering cavity is communicated with the interior of the outer sleeve pad, and the second electrode sleeve is inserted into the covering cavity.

[0010] The first electrode sleeve is provided with an electrode cavity, the electrode cavity is communicated with the covering cavity, and the electrode body is located in the electrode cavity.

[0011] The beneficial effects of the utility model are:

[0012] The coating component includes an outer sleeve, a coating sleeve and a first electrode sleeve. The resistor is composed of a resistor shell and an electrode body. At the connection portion between the two, the second electrode sleeve is sleeved on the outside of the electrode body, and the outer sleeve is sleeved on the outside of the second electrode sleeve. One side of the coating sleeve is located on the outside of the outer sleeve, and the other side of the coating sleeve is located on the outside of the resistor shell. The second electrode sleeve is used to strengthen the connection between the electrode body and the resistor shell, and the first electrode sleeve is coated on the outside, so that the first extension edge and the second extension edge of the coating sleeve can be extended to increase the coverage area, thereby strengthening the connection between the electrode and the shell, improving the sealing effect, and further improving the explosion-proof performance.

[0013] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a top view of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the outer jacket pad in the utility model;

[0017] Figure 4 It is a schematic diagram of the structure of the first electrode sleeve in the utility model;

[0018] In the figure: 1, resistor shell; 11, electrode body; 2, coating assembly; 21, outer sleeve; 22, coating sleeve; 221, first extended edge; 222, second extended edge; 23, first electrode sleeve; 231, annular groove; 232, coating cavity; 233, electrode cavity; 24, clamping ring; 3, second electrode sleeve. DETAILED DESCRIPTION

[0019] See also Figure 1-Figure 4 The utility model provides the following technical solution: it includes a resistor shell 1, an electrode body 11 is provided on the resistor shell 1, a covering component 2 is provided between the resistor shell 1 and the electrode body 11, the covering component 2 includes an outer sleeve 21, a covering sleeve 22 and a first electrode sleeve 23, a second electrode sleeve 3 is fixedly connected to the outside of the resistor shell 1, the second electrode sleeve 3 is sleeved on the outside of the electrode body 11, and the outer sleeve 21 is sleeved on the outside of the second electrode sleeve 3, one side of the covering sleeve 22 is located on the outside of the outer sleeve 21, and the other side of the covering sleeve 22 is located on the outside of the resistor shell 1.

[0020] In this embodiment: the coating component 2 includes an outer jacket gasket 21, a coating sleeve 22 and a first electrode sleeve 23, the resistor is composed of a resistor shell 1 and an electrode body 11, and at the connection portion between the two, the second electrode sleeve 3 is sleeved on the outside of the electrode body 11, and the second electrode sleeve 3 is used to strengthen the connection between the resistor shell 1 and the electrode body 11, and the outer jacket gasket 21 is sleeved on the outside of the second electrode sleeve 3, one side of the coating sleeve 22 is located on the outside of the outer jacket gasket 21, and the other side of the coating sleeve 22 is located on the outside of the resistor shell 1, the second electrode sleeve 3 is used to strengthen the connection at the position of the electrode body 11 and the resistor shell 1, and the first electrode sleeve 23 is coated on the outside, the coating sleeve 22 has a first extended edge 221 and a second extended edge 222, the first extended edge 221 is fixedly connected to the resistor shell 1, and the second extended edge 222 is fixedly connected to the outer The sleeve gasket 21 is fixedly connected so that the first extension edge 221 and the second extension edge 222 of the covering sleeve 22 can be extended to increase the coverage area, thereby strengthening the connection part between the electrode and the shell, improving the sealing effect, and further improving the explosion-proof performance. The first electrode sleeve 23 is connected to the outside of the electrode body 11. The first electrode sleeve 23 is provided with an electrode cavity 233. The electrode cavity 233 is connected to the covering cavity 232. The electrode body 11 is located in the electrode cavity 233. The clamping ring 24 is inserted into the annular groove 231. The clamping ring 24 is made of elastic material. When the clamping ring 24 enters the annular groove 231, it can hold one side of the first electrode sleeve 23, thereby tightly attaching the inner end face of the first electrode sleeve 23 to the outer side of the second electrode sleeve 3, thereby improving the sealing performance.

[0021] The covering sleeve 22 has a first extended edge 221 and a second extended edge 222. The first extended edge 221 is fixedly connected to the resistor shell 1, and the second extended edge 222 is fixedly connected to the outer sleeve pad 21. The first extended edge 221 and the second extended edge 222 of the covering sleeve 22 can be extended to increase the coverage area, thereby strengthening the connection part between the electrode and the outer shell.

[0022] The outer jacket gasket 21 is fixedly connected to the resistor shell 1, and the first electrode sleeve 23 is fixed outside the outer jacket gasket 21; the second electrode sleeve 3 is used to strengthen the connection between the electrode body 11 and the resistor shell 1, and the first electrode sleeve 23 is covered on the outside for use.

[0023] The first electrode sleeve 23 is provided with an annular groove 231, and a clamping ring 24 is inserted into the annular groove 231; the clamping ring 24 is inserted into the annular groove 231, and the clamping ring 24 is made of elastic material. When the clamping ring 24 enters the annular groove 231, it can hold one side of the first electrode sleeve 23, and then the inner end face of the first electrode sleeve 23 is tightly attached to the outer side of the second electrode sleeve 3.

[0024] The first electrode sleeve 23 is provided with a covering cavity 232, which is communicated with the inside of the outer sleeve 21, and the second electrode sleeve 3 is inserted into the covering cavity 232; by setting the outer sleeve 21 and the first electrode sleeve 23, the connection position can be strengthened.

[0025] The first electrode sleeve 23 is provided with an electrode cavity 233, which is connected with the covering cavity 232, and the electrode body 11 is located in the electrode cavity 233; when the first electrode sleeve 23 is in use, the electrode cavity 233 acts to tightly adhere the inner end surface of the first electrode sleeve 23 to the outer side of the second electrode sleeve 3, thereby improving the sealing performance.

[0026] The working principle and use process of the utility model are as follows: the resistor is composed of a resistor shell 1 and an electrode body 11. At the connection portion between the two, a second electrode sleeve 3 is sleeved on the outside of the electrode body 11. The second electrode sleeve 3 strengthens the connection between the resistor shell 1 and the electrode body 11, and an outer sleeve 21 is sleeved on the outside of the second electrode sleeve 3. One side of the covering sleeve 22 is located on the outside of the outer sleeve 21, and the other side of the covering sleeve 22 is located on the outside of the resistor shell 1. The second electrode sleeve 3 is used to strengthen the connection between the electrode body 11 and the resistor shell 1, and the first electrode sleeve 23 is covered on the outside. The covering sleeve 22 has a first extended edge 221 and a second extended edge 222. The first extended edge 221 is fixedly connected to the resistor shell 1, and the second extended edge 222 is fixedly connected to the outer sleeve 21, so that the covering sleeve 22 is The first extended edge 221 and the second extended edge 222 of the covering sleeve 22 can be extended to increase the coverage area, thereby strengthening the connection part between the electrode and the shell, improving the sealing effect, and further improving the explosion-proof performance. The first electrode sleeve 23 is connected to the outside of the electrode body 11. The first electrode sleeve 23 is provided with an electrode cavity 233. The electrode cavity 233 is connected to the covering cavity 232. The electrode body 11 is located in the electrode cavity 233. The clamping ring 24 is inserted into the annular groove 231. The clamping ring 24 is made of elastic material. When the clamping ring 24 enters the annular groove 231, it can hold one side of the first electrode sleeve 23, thereby tightly attaching the inner end face of the first electrode sleeve 23 to the outer side of the second electrode sleeve 3, thereby improving the sealing performance.

Claims

1. An explosion-proof varistor, comprising a resistor shell (1), wherein an electrode body (11) is provided on the resistor shell (1), characterized in that: A covering component (2) is provided between the resistor shell (1) and the electrode body (11), the covering component (2) comprising an outer sleeve (21), a covering sleeve (22) and a first electrode sleeve (23); a second electrode sleeve (3) is fixedly connected to the outside of the resistor shell (1); the second electrode sleeve (3) is sleeved on the outside of the electrode body (11), and the outer sleeve (21) is sleeved on the outside of the second electrode sleeve (3); one side of the covering sleeve (22) is located on the outside of the outer sleeve (21), and the other side of the covering sleeve (22) is located on the outside of the resistor shell (1).

2. The explosion-proof varistor according to claim 1, characterized in that: The covering sleeve (22) has a first extended edge (221) and a second extended edge (222); the first extended edge (221) is fixedly connected to the resistor shell (1); and the second extended edge (222) is fixedly connected to the outer sleeve pad (21).

3. The explosion-proof varistor according to claim 1, characterized in that: The outer jacket gasket (21) is fixedly connected to the resistor shell (1), and the first electrode sleeve (23) is fixed on the outside of the outer jacket gasket (21).

4. The explosion-proof varistor according to claim 1, characterized in that: The first electrode sleeve (23) is provided with an annular groove (231), and a clamping ring (24) is inserted into the annular groove (231).

5. The explosion-proof varistor according to claim 1, characterized in that: The first electrode sleeve (23) is provided with a covering cavity (232), the covering cavity (232) is communicated with the interior of the outer sleeve (21), and the second electrode sleeve (3) is inserted into the covering cavity (232).

6. The explosion-proof varistor according to claim 5, characterized in that: The first electrode sleeve (23) is provided with an electrode cavity (233), the electrode cavity (233) is communicated with the covering cavity (232), and the electrode body (11) is located in the electrode cavity (233).

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