Mining instrument wire passing sealing structure

Abstract

The utility model relates to the technical field of wire-passing sealing structures, in particular to a wire-passing sealing structure of a mining instrument, which comprises a sealing assembly and a cable channel. The cable channel is of a cylindrical structure made of a sealing elastic material, and the cable channel is located in the middle of the sealing assembly and penetrates through the whole sealing assembly. The sealing assembly comprises an inner core body and a sealing colloid, and the inner core body is embedded in the sealing colloid and forms a cavity with the cable channel; a cavity is formed in the inner core body, a self-extrusion mechanism is arranged in the cavity and comprises a semicircular extrusion ring, an elastic pressing arm and a limiting groove, the limiting groove is formed in the side, close to the cavity, of the inner core body, one end of the elastic pressing arm is connected with the limiting groove through a connecting piece, and the other end of the elastic pressing arm is fixedly connected with the semicircular extrusion ring. According to the utility model, through cooperation of the inner core body, the sealing colloid and the self-extrusion mechanism, the cable and the cable channel are tightly attached, the sealing effect reaches the IP68 protection grade, a simple installation mode is reserved, and sealing of cables of multiple sizes is realized.

Description

Technical Field

[0001] This utility model relates to the field of wire sealing structure technology, and more specifically, to a wire sealing structure for mining instruments. Background Technology

[0002] Currently, the cable outlets of underground mining instruments in coal mines require an IP54 protection rating for sealing. Structurally, these outlets often employ a single-layer rubber gasket seal to ensure a proper seal at the cable exit. While this single-layer seal is simple and easy to use, its sealing reliability is not stable enough, especially when sealing multiple cables. The compressibility of the single-layer rubber gasket can limit the seal's reliability, making it difficult to achieve effective and reliable protection. Replacing the single-layer seal with a double-layer or multi-layer seal improves the reliability of the cable outlet seal, but this complicates installation and is inconvenient. Therefore, there is an urgent need for a cable sealing structure for mining instruments that combines the ease of installation of a single-layer seal with the sealing effect of a double-layer seal. Utility Model Content

[0003] The purpose of this invention is to provide a sealing structure for the wire passage of mining instruments.

[0004] To achieve the above objectives, this utility model provides a sealing structure for a mining instrument cable, including a sealing component and a cable channel. The cable channel is a cylindrical structure made of a sealing elastic material, located in the middle of the sealing component and running through the entire sealing component. The sealing component includes an inner core and a sealing colloid, with the inner core embedded inside the sealing colloid to form a cavity between it and the cable channel. A self-pressing mechanism is provided inside the cavity, comprising a semi-circular pressing ring, an elastic clamping arm, and a limiting groove. The limiting groove is located on the side of the inner core near the cavity, one end of the elastic clamping arm is connected to the limiting groove via a connector, and the other end of the elastic clamping arm is fixedly connected to the semi-circular pressing ring.

[0005] Preferably, the self-extrusion mechanism is symmetrically arranged at the port near the cable channel, and the inner wall of the semi-circular extrusion ring fits against the outer wall of the cable channel.

[0006] Preferably, the curvature of the inner wall of the semi-circular extrusion ring is the same as the curvature of the outer wall of the cable channel.

[0007] Preferably, both ends of the sealing colloid are provided with pyramidal grooves, the number of pyramidal grooves is ≥4, and they are symmetrically arranged on both sides of the port of the cable channel.

[0008] Preferably, the sealing colloid is made of an elastic material, while the inner core is made of a rigid material.

[0009] This utility model has the following beneficial effects:

[0010] This invention provides a sealing structure for cables used in mining instruments, including a sealing component and a cable channel. The cable channel is a cylindrical structure made of a sealing elastic material, located in the center of the sealing component and extending through the entire component. The sealing component includes an inner core and a sealing colloid. The inner core is embedded inside the sealing colloid, forming a cavity between itself and the cable channel. A self-compression mechanism is provided within the cavity. This mechanism includes a semi-circular compression ring, an elastic clamping arm, and a limiting groove. The limiting groove is located on the side of the inner core near the cavity. One end of the elastic clamping arm is connected to the limiting groove via a connector, and the other end is fixedly connected to the semi-circular compression ring. This invention, through the cooperation of the inner core, the sealing colloid, and the self-compression mechanism, ensures a tight seal at the sealing lip between the cable and the cable channel, significantly improving the sealing effect to achieve an IP68 protection rating. It also retains the simple installation method of a single-layer rubber gasket, meeting the sealing requirements of cables of different sizes and enabling sealing of multiple cable sizes.

[0011] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0012] Figure 1 This is a side sectional view of the sealing structure for the mining instrument of this utility model;

[0013] Figure 2 This is a front sectional view of the sealing structure for the mining instrument of this utility model;

[0014] Figure 3 This is a schematic diagram of the self-extrusion mechanism of this utility model;

[0015] Figure 4 This is a schematic diagram of the mining instrument of this utility model;

[0016] Figure label:

[0017] 1. Instrument housing; 2. Internal mounting components; 3. Cables; 4. Cable sealing structure; 5. Pressure cap; 6. Pressure cap seat; 7. Central channel;

[0018] Among them, 401 is the sealing colloid; 402 is the inner core; 403 is the pyramidal groove; 404 is the self-extrusion mechanism; 405 is the cable channel; and 406 is the cavity.

[0019] 4041 is a semi-circular compression ring; 4042 is an elastic clamping arm; 4043 is a limiting groove. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments. Unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The features mentioned above or in the specific examples mentioned in this invention can be combined arbitrarily, and these specific embodiments are only used to illustrate this invention and are not intended to limit the scope of this invention.

[0021] Example 1

[0022] like Figure 1-3 As shown, this utility model provides a sealing structure for a mining instrument cable, including a sealing component and a cable channel 405. The cable channel 405 is a cylindrical structure made of a sealing elastic material, located in the middle of the sealing component and passing through the entire sealing component. The sealing component includes an inner core 402 and a sealing colloid 401. The inner core 402 is embedded inside the sealing colloid 401 and forms a cavity 406 between itself and the cable channel 405. A self-pressing mechanism 404 is provided in the cavity 406. The self-pressing mechanism 404 includes a semi-circular pressing ring 4041, an elastic pressing arm 4042, and a limiting groove 4043. The limiting groove 4043 is located on the side of the inner core 402 near the cavity 406. One end of the elastic pressing arm 4042 is connected to the limiting groove 4043 through a connector, and the other end of the elastic pressing arm 4042 is fixedly connected to the semi-circular pressing ring 4041. The aforementioned connecting component is a bolt. The bolt connection allows adjustment of the preload of the self-pressurizing mechanism 404, achieving controllable initial sealing force. The elastic pressing arm 4042 is a spring, which generates a reaction force when compressed.

[0023] The self-extrusion mechanism 404 is symmetrically arranged near the port of the cable channel 405. The inner wall of the semi-circular extrusion ring 4041 fits against the outer wall of the cable channel 405, and the curvature of the inner wall of the semi-circular extrusion ring 4041 is the same as the curvature of the outer wall of the cable channel 405. When the cable passes through the cable channel 405, the cable channel 405 deforms under the action of radial expansion force, pressing the inner wall of the semi-circular extrusion ring 4041 outward, and at the same time triggering the elastic clamping arm 4042 to contract. The contraction resistance of the elastic clamping arm 4042 is positively correlated with the radial expansion force of the cable channel 405. The clamping force of the semi-circular extrusion ring 4041 on the cable channel 405 adaptively increases with the increase of the cable diameter, achieving the sealing effect of cables of different sizes.

[0024] Both ends of the sealing colloid 401 are provided with pyramidal grooves 403, and the number of pyramidal grooves 403 is ≥4, symmetrically arranged on both sides of the port of the cable channel 405. The pyramidal grooves 403 can convert the lateral extrusion pressure into longitudinal pressure, making the fit between the cable and the cable channel 405 tighter and improving the sealing performance.

[0025] The sealing colloid 401 is made of an elastic material, while the inner core 402 is made of a rigid material. When the elastic material of the sealing colloid 401 is compressed, the rigid inner core 402 supports the outer sealing colloid 401, preventing cable displacement caused by excessive deformation and ensuring that the components maintain relative positional stability under high pressure, vibration, or cable torsion. The cavity 406 provides space for larger diameter cables, making it suitable for the installation of cables of various sizes.

[0026] like Figure 4 As shown, this utility model also provides a mining instrument, including an instrument housing 1, an internal mounting component 2, a cable 3, a cable sealing structure 4, a pressure cap 5, a pressure cap seat 6, and a central channel 7. The cable 3 is connected to the internal mounting component 2 of the instrument housing 1 through the central channel 7 and the cable channel 405. The internal mounting component 2 includes a circuit board and a sensor. When the diameter of the cable 3 does not exceed the limit, the elastic clamping arm 4042 is driven by the spring preload, which drives the semi-circular compression ring 4041 to press tightly against the outer wall of the cable channel 405, so that the inner wall of the channel forms a sealed contact with the surface of the cable 3, improving the sealing performance. When the diameter of the cable 3 exceeds the set threshold, the cable channel 405 expands outward under the action of radial expansion force and deforms, squeezing the inner wall of the semi-circular compression ring 4041 and compressing the elastic clamping arm 4042. The resistance of the elastic clamping arm increases, and the reaction force forces the semi-circular compression ring 4041 to press tightly against the cable channel 405, realizing dynamic sealing enhancement and meeting the sealing requirements of cables of various sizes.

[0027] When the pressure cap 5 is tightened in the pressure cap seat 6, it will squeeze one end of the sealing colloid 401. The pyramidal groove 403 inside the sealing colloid 401 will deform and generate radial force, which will press the lip of the cable channel 405 and increase the sealing between the inner wall of the cable channel 405 and the cable 3.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A sealing structure for a mining instrument's thread, characterized in that, It includes a sealing assembly and a cable channel; the cable channel is a cylindrical structure made of a sealing elastic material, located in the middle of the sealing assembly and running through the entire sealing assembly; the sealing assembly includes an inner core and a sealing colloid, the inner core is embedded inside the sealing colloid and forms a cavity between it and the cable channel; a self-extrusion mechanism is provided in the cavity, the self-extrusion mechanism includes a semi-circular extrusion ring, an elastic clamping arm and a limiting groove, the limiting groove is located on the side of the inner core near the cavity, one end of the elastic clamping arm is connected to the limiting groove through a connector, and the other end of the elastic clamping arm is fixedly connected to the semi-circular extrusion ring.

2. The mine instrument wire pass seal of claim 1, wherein, The self-extrusion mechanism is symmetrically positioned at the port near the cable channel, with the inner wall of the semi-circular extrusion ring fitting against the outer wall of the cable channel.

3. The mine instrument wire pass seal of claim 1, wherein, The curvature of the inner wall of the semi-circular extrusion ring is the same as the curvature of the outer wall of the cable channel.

4. The sealing structure for the wire passage of mining instruments according to claim 1, characterized in that, Both ends of the sealing colloid are provided with pyramidal grooves, the number of which is ≥4, and they are symmetrically arranged on both sides of the cable channel port.

5. The sealing structure for the wire passage of mining instruments according to claim 1, characterized in that, The sealing colloid is made of an elastic material, while the inner core is made of a rigid material.

Images