Self-tightening lead sealing device

Abstract

The utility model mainly relates to a self-tightening lead sealing device, which comprises a device main body, the device main body comprises a cavity wall, and the cavity wall is sequentially provided with a taper hole and an unthreaded hole from inside to outside; a conical sealing head is arranged at the conical hole, and the conical surface of the sealing head and the cavity conical hole form a linear sealing structure; a conical hole is formed in the sealing head, and a conical soft plug matched with the conical hole is arranged in the conical hole; the two ends of the lead penetrate through the taper hole and the unthreaded hole to be connected with the inside and the outside of the cavity wall. The lead sealing device provided by the utility model is simple in structure and convenient to disassemble and assemble, the sealing capability is increased along with the increase of the pressure in the cavity, and the lead sealing device is suitable for sealing sensor leads in various high-pressure equipment.

Description

Technical Field

[0001] This utility model relates to the field of sealing technology, and more specifically, to a self-tightening lead wire sealing device. Background Technology

[0002] In industries such as petrochemicals and energy, there are numerous high-voltage equipment. With the increasing need for intelligent production management, these equipment require a large number of intelligent monitoring units, such as sensors. Sealing the sensor leads has always been a challenging problem in the industry.

[0003] Currently, the main method for sealing sensor leads is resin curing, which involves filling the central hole through which the lead passes with resin. However, this method is difficult to achieve a good sealing effect in high-pressure applications, and the resin will gradually age over time, greatly reducing its sealing performance. Utility Model Content

[0004] To address the issue that existing resin curing methods struggle to achieve adequate sealing under high pressure, this invention provides a self-tightening lead wire sealing device that can effectively seal the lead wire under high pressure.

[0005] To solve the above-mentioned technical problems, the present invention provides a solution through the following technical method:

[0006] A self-tightening lead wire sealing device includes a device body, which includes a cavity. The cavity has a conical hole and a smooth hole sequentially formed from the inside to the outside. A conical sealing head is provided at the conical hole, and the conical surface of the sealing head and the conical hole of the cavity form a line sealing structure. A conical hole is provided on the sealing head, and a conical soft plug that mates with the conical hole is provided inside the conical hole. A lead wire is provided inside the conical soft plug, and the two ends of the lead wire pass through the conical hole and the smooth hole to connect the inside and outside of the cavity wall.

[0007] The conical hole is fitted with a conical soft plug. As the pressure inside the cavity wall increases, the medium inside the cavity wall squeezes the conical soft plug towards the tip of the cone, making the sealing surface tighter and tighter, thus achieving the purpose of sealing.

[0008] Preferably, a threaded hole is formed in the tapered hole towards the inner cavity, and a fastening nut is set at the threaded hole to press the sealing head tight. The fastening nut has a central hole for the lead wire to pass through.

[0009] The fastening nut provides the force needed for initial sealing, preventing poor sealing performance of the sealing head under low pressure.

[0010] Preferably, the center hole on the fastening nut is a stepped hole, with the larger diameter near the sealing head.

[0011] Preferably, the major diameter of the center hole on the fastening nut is not less than the major diameter of the tapered hole on the sealing head.

[0012] The central hole allows the medium inside the cavity to enter the fastening nut. When the large diameter of the central hole is not smaller than the large diameter of the conical hole on the sealing head, the conical soft plug 4 is subjected to more uniform extrusion pressure, thereby achieving a better sealing effect.

[0013] Preferably, the length of the sealing head does not exceed the depth of the threaded hole.

[0014] The length of the sealing head does not exceed the depth of the threaded hole, allowing the sealing head to be fully installed inside the cavity wall, forming a good fit with the fastening nut.

[0015] Preferably, the tapered soft stopper is made of rubber material.

[0016] The rubber material has a certain degree of elasticity, ensuring that the lead wire will not be damaged under high voltage conditions.

[0017] The beneficial effects of this utility model are as follows:

[0018] The device has a simple structure, is easy to assemble and disassemble, and its sealing capacity increases with the increase of pressure inside the cavity, making it suitable for sealing the internal sensor leads of various high-voltage equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0020] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are merely illustrative of this utility model and are not intended to limit it.

[0021] Example 1

[0022] like Figure 1 As shown, this embodiment provides a self-tightening lead-wire sealing device, including a device body P. The device body P includes a cavity wall 1, with a conical hole and a smooth hole sequentially formed from the inside to the outside of the cavity wall 1. A conical sealing head 5 is provided at the conical hole, and the conical surface of the sealing head 5 and the conical hole of the cavity form a line sealing structure. A conical hole is provided on the sealing head 5, and a conical soft plug 4 that mates with the conical hole is provided inside the conical soft plug 4. A lead wire 3 is provided inside the conical soft plug 4, and the two ends of the lead wire 3 pass through the conical hole and the smooth hole to connect the inside and outside of the cavity wall 1. As the pressure inside the cavity wall 1 increases, the medium inside the cavity wall 1 squeezes the conical soft plug 4 towards the conical tip, pressing the sealing surface tighter and tighter to achieve the purpose of sealing.

[0023] In this embodiment, a threaded hole is formed in the tapered hole towards the inner cavity, and a fastening nut 2 is installed at the threaded hole to press the sealing head 5 tight. The fastening nut 2 has a central hole for the lead wire to pass through. The fastening nut 2 can provide the force required for initial sealing and prevent poor sealing effect of the sealing head 5 when the pressure is low.

[0024] In this embodiment, the central hole on the fastening nut 2 is a stepped hole, with the larger diameter near the sealing head. The larger diameter of the central hole on the fastening nut 2 is not smaller than the larger diameter of the tapered hole on the sealing head 5, while the length of the sealing head 5 does not exceed the depth of the threaded hole. By setting the larger diameter of the central hole, the medium in the cavity enters the fastening nut 2 and applies a uniform compressive force to the tapered soft plug 4, resulting in a better sealing effect.

[0025] In this embodiment, the conical soft plug 4 is made of rubber. The rubber material has a certain degree of elasticity, ensuring that the lead wire will not be damaged under high voltage conditions.

[0026] During installation, the lead wire 3 can be first cured into the tapered hole of the sealing head 5 with rubber material, and then the above part can be placed into the threaded hole of the cavity 1. The lead wires at both ends of the sealing head 5 pass through the light hole on the cavity wall 1 and the center hole of the fastening nut 2, respectively.

[0027] In summary, the above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall fall within the scope of the patent of the present utility model.

Claims

1. A self-tightening lead seal device, characterized by: The device body (P) comprises a cavity wall (1) which is provided with a taper hole and a light hole from inside to outside in sequence; a tapered sealing head (5) is arranged at the taper hole, and the taper surface of the sealing head (5) and the taper hole of the cavity wall (1) form a linear sealing structure; a tapered hole is formed in the sealing head (5), and a tapered soft plug (4) matched with the tapered hole is arranged in the tapered hole; a lead wire (3) is arranged in the tapered soft plug (4), and the lead wire (3) is connected to the inside and outside of the cavity wall (1) through the taper hole and the light hole.

2. A self-tightening lead seal device according to claim 1, wherein: A threaded hole is formed in the taper hole in the direction of the inner cavity, a fastening nut (2) is arranged at the threaded hole, the sealing head (5) is pressed tightly, and a central hole for the lead wire (3) to pass through is formed in the fastening nut (2).

3. A self-tightening lead seal device as defined in claim 2 wherein: The central hole in the fastening nut (2) is a stepped hole, and the diameter near the sealing head is large.

4. A self-tightening lead seal device as defined in claim 3 wherein: The diameter of the central hole in the fastening nut (2) is not less than the diameter of the tapered hole in the sealing head (5).

5. A self-tightening lead seal device as defined in claim 1, wherein: The length of the sealing head (5) is not more than the depth of the threaded hole.

6. A self-tightening lead seal device as defined in claim 1, wherein: The tapered soft plug (4) is made of rubber material.

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