Plug-in assembly for cable penetration

Abstract

The utility model belongs to the technical field of cable crossing equipment, and discloses a plugging assembly for cable crossing, which comprises a junction box fixedly connected to the side surface of an oil pipe and an upper plug plugged with the junction box, the junction box is connected with an underground cable, and the upper plug is connected with a ground cable. An underground cable and a ground cable are connected through the junction box and the upper plug to form a passage; the junction box and the upper plug are located in an annular space between the oil pipe and the sleeve, the junction box is integrally in a long strip shape, the section of the junction box is in a sector ring shape, the inner side face, making contact with the oil pipe, of the junction box is concave inwards, and therefore it is guaranteed that the junction box can be completely attached to the oil pipe. By arranging the junction box and the upper plug, the junction box with the sector-ring-shaped cross section can be tightly attached and fixed to the outer wall of the oil pipe and can also adapt to the annular space between the oil pipe and the sleeve, and the long and narrow upper plug is matched with the junction box; the defect that a conventional cable penetrating device cannot be installed due to the fact that the annulus face is specific in shape and small in area is fundamentally overcome.

Description

Technical Field

[0001] This utility model belongs to the technical field of cable crossing equipment, specifically relating to a plug-in assembly for cable crossing. Background Technology

[0002] With the development of my country's petroleum exploration and development, the development of offshore oil wells and low-pressure oil wells has intensified, and the supporting electric submersible pump (ESP) integrated oil recovery technology has also developed rapidly. In existing technologies, a cable puller is typically used to connect the cables, transmitting surface power to the downhole ESP, which then drives the ESP to lift crude oil along the tubing to the surface. The tubing and the cable puller are independently installed within the casing. However, for smaller wellheads, the narrow annulus between the tubing and casing prevents sufficient installation space for the cable puller, rendering conventional cable pullers unusable. Summary of the Invention

[0003] In view of this, the present invention aims to provide a plug-in assembly for cable crossing, so as to solve the technical problem in the prior art that the narrow annular space between the oil pipe and the sleeve makes it impossible to reserve enough installation space for the cable crossing device.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A plug-in assembly for cable crossing includes a junction box fixedly connected to the side of the tubing and an upper plug that plugs into the junction box. The junction box is connected to the downhole cable, and the upper plug is connected to the surface cable. The junction box and the upper plug connect the downhole cable and the surface cable to form a passage. The junction box and the upper plug are located in the annular space between the tubing and the casing. The junction box is generally elongated and has a fan-shaped cross-section. The inner side of the junction box that contacts the tubing is concave, thereby ensuring that the junction box and the tubing can fit completely together.

[0006] Furthermore, the junction box includes a main housing, with an upper sealing plate and a lower sealing block at the upper and lower ends of the main housing, respectively. The upper sealing plate has three evenly distributed positioning holes, which are arranged in an arc shape and partially surround the outside of the oil pipe. A positioning cylinder is provided inside the positioning hole, and the positioning cylinder is connected and fixed to the upper sealing plate by a locking sleeve. An insulating connecting cylinder is threaded inside the positioning cylinder, and a conductive cylinder and a first insulating conductive rod are sequentially arranged in the vertical direction inside the insulating connecting cylinder.

[0007] Furthermore, the lower end of the positioning cylinder extends into the interior of the main body shell, the upper end of the positioning cylinder protrudes above the upper sealing plate, and the upper end of the positioning cylinder is provided with an external thread. The upper end of the insulating connecting cylinder forms a limiting step, which abuts against the outer end face of the positioning cylinder to achieve positioning of the insulating connecting cylinder.

[0008] Furthermore, the conductive cylinder is threadedly connected to the insulating connecting cylinder, and the outer wall of the conductive cylinder is in close contact with the inner wall of the insulating connecting cylinder. The upper end face of the conductive cylinder is flush with the bottom surface of the insertion interface, so that the conductive cylinder and the insertion interface are connected. The upper and lower ends of the conductive cylinder are respectively provided with a first accommodating space and a second accommodating space, and the first accommodating space and the second accommodating space are connected through a connecting channel.

[0009] Furthermore, the upper end of the first insulating conductive rod is located inside the insulating connecting cylinder, and the lower end of the first insulating conductive rod extends to the outside of the insulating connecting cylinder. The first insulating conductive rod includes a first conductive rod, and the insertion section of the upper part of the first conductive rod is inserted into the second receiving space. A threaded hole is opened axially at the center position of the end face of the insertion section of the first conductive rod. The body of the tension screw passes through the connecting channel and is threadedly connected to the first conductive rod. The nut of the tension screw is located in the first receiving space and abuts against the bottom surface of the first receiving space. The first insulating conductive rod is fixed to the conductive cylinder by the tension screw.

[0010] Furthermore, the lower end of the first conductive rod is provided with a first connecting cylinder with a coaxial axis. The opening direction of the first connecting cylinder is away from the first conductive rod. The three-phase armored cable in the well penetrates the entire lower sealing block at the center position of the lower sealing block end face in the vertical direction and is dispersed into three independent underground cables. The free end of the underground cable forms a stripped head and is inserted into the first connecting cylinder to realize the connection between the junction box and the underground cable.

[0011] Furthermore, the first insulating conductive rod near the first connecting cylinder and the downhole cable near the first connecting cylinder are both covered with a first insulating reinforcing layer;

[0012] Furthermore, the upper plug includes a connecting tube, the upper end of which is fitted with a connector. The connector has two hollow cylindrical openings at both ends. The upper end of the connecting tube is inserted into the lower opening of the connector and threaded. The lower end of the connecting tube is fitted with a connecting screw cap. The lower opening of the connecting tube protrudes outward to form an annular step, which limits the connecting screw cap. The part of the connecting screw cap that extends beyond the connecting tube includes a threaded connection section in the middle of the connecting screw cap and a sealing section at the bottom of the connecting screw cap. The threaded connection section in the middle of the connecting screw cap has an internal thread.

[0013] Furthermore, a second insulating conductive rod is provided at the lower end of the cavity inside the connecting tube. The second insulating conductive rod includes a second conductive rod coaxial with the connecting tube. The lower end of the second conductive rod extends beyond the connecting screw cap and has a pin formed at the lower end. A second connecting cylinder coaxial with the upper end of the second conductive rod is provided. The opening direction of the second connecting cylinder is opposite to the second conductive rod. The ground cable passes through the connector and extends into the connecting tube. Its end has a stripping head and is inserted into the second connecting cylinder, thereby realizing the connection between the ground cable and the upper plug.

[0014] Furthermore, the second insulating conductive rod is divided into an upper section, a middle section, and a lower section due to the different dimensions of the second insulating layer. The upper section of the second insulating conductive rod has a gap between it and the cavity wall inside the connecting pipe; the middle section of the second insulating conductive rod is threaded into the connecting pipe; and the lower section of the second insulating conductive rod protrudes from the lower end of the connecting pipe, with a gap between it and the connecting screw cap.

[0015] The beneficial effects of this utility model are as follows:

[0016] Compared to existing technologies, by incorporating a junction box and upper plug, the junction box, with its fan-shaped cross-section, not only fits snugly against the outer wall of the tubing but also adapts to the annular space between the tubing and casing. The elongated upper plug, working in conjunction with the junction box, fundamentally solves the problem of the limited area and specific shape of the annular space, which prevents the installation of conventional cable runners. Furthermore, the tubing provides support and fixation for the junction box, preventing collisions and damage between the junction box and the inner tubing or outer casing during oil production. On the other hand, the connection between the junction box and upper plug is stable, providing excellent power transmission performance, and can replace conventional cable runners. Its simple structure also allows for rapid installation. Additionally, the overall structure of the connector is compact, and the junction box and upper plug incorporate multiple sealing structures to effectively prevent well fluid or gas from entering. Attached Figure Description

[0017] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration:

[0018] Figure 1 This is a schematic diagram of the junction box in Embodiment 1 of this utility model;

[0019] Figure 2 This is a schematic diagram of the upper sealing plate in Embodiment 1 of this utility model;

[0020] Figure 3 This is a cross-sectional view of the junction box in Embodiment 1 of this utility model;

[0021] Figure 4 for Figure 3 Enlarged view at point A1;

[0022] Figure 5 This is a cross-sectional view of the conductive cylinder in Embodiment 1 of this utility model;

[0023] Figure 6 This is a schematic diagram of the upper plug in Embodiment 1 of this utility model;

[0024] Figure 7 This is a cross-sectional view of the upper plug in Embodiment 1 of this utility model.

[0025] The following labels are shown in the attached diagram:

[0026] Junction box 1, main body shell 101, upper sealing plate 102, positioning hole 1021, lower sealing block 103, injection hole 1031, positioning cylinder 104, insulating connecting cylinder 105, plug interface 1051, conductive cylinder 106, first accommodating space 1061, second accommodating space 1062, connecting channel 1063, first insulating conductive rod 107, first conductive rod 1071, first connecting cylinder 1072, first insulating layer 1073, first insulating reinforcing layer 108, armored cable 109, downhole cable 110, sealing molding 111, clamping plate 112, tensioning screw 113, upper plug 2, connecting pipe 201, connector 202, connecting screw cap 203, second insulating conductive rod 204, second conductive rod 2041, second connecting cylinder 2042, pin 2043, ground cable 205, steel pipe 206, compression fitting 207, second insulating reinforcing layer 208. Detailed Implementation

[0027] Example 1, see details Figures 1-7 .

[0028] A plug-in assembly for cable crossing includes a junction box 1 fixedly connected to the side of the tubing and an upper plug 2 plugged into the junction box 1. The junction box 1 is connected to the downhole cable, and the upper plug 2 is connected to the surface cable. The downhole cable and the surface cable are connected through the junction box 1 and the upper plug 2 to form a passage.

[0029] like Figure 1 As shown, the junction box 1 is elongated and has a fan-shaped cross-section, meaning the inner surface of the junction box 1 that contacts the oil pipe is concave, ensuring a complete fit between the junction box 1 and the oil pipe. The junction box 1 includes a hollow main body shell 101 with openings at both ends. An upper sealing plate 102 and a lower sealing block 103 are welded to the upper and lower openings of the main body shell 101, respectively, sealing both ends of the main body shell 101. It should be noted that in this embodiment, the upper surface of the upper sealing plate 102 is flush with the upper opening of the main body shell 101, and the lower sealing block 103 extends downwards and forms a certain taper. This taper serves as a guide, facilitating the positioning and installation of the junction box 1.

[0030] The upper sealing plate 102 has three evenly distributed positioning holes 1021, which are arranged in an arc shape and partially surround the outside of the oil pipe. A positioning cylinder 104 is installed inside each positioning hole 1021. The positioning cylinder 104 is connected and fixed to the upper sealing plate 102 by a locking sleeve. The lower end of the positioning cylinder 104 extends into the main housing 101, while the upper end protrudes above the upper sealing plate 102. The upper end of the positioning cylinder 104 has an external thread. An insulating connecting cylinder 105 is internally threaded onto the positioning cylinder 104. The upper end of the insulating connecting cylinder 105 forms a limiting step, which abuts against the outer end face of the positioning cylinder 104 to position the insulating connecting cylinder 105. Two O-ring seals are provided between the positioning cylinder 104 and the insulating connecting cylinder 105; this is existing technology and will not be described in detail.

[0031] An insertion interface 1051 is formed in the cavity at the upper end of the insulating connecting cylinder 105. A conductive cylinder 106 and a first insulating conductive rod 107 are sequentially arranged in the vertical direction inside the insulating connecting cylinder 105. The conductive cylinder 106 is threadedly connected to the insulating connecting cylinder 105, and the outer wall of the conductive cylinder 106 is in close contact with the inner wall of the insulating connecting cylinder 105. The upper end face of the conductive cylinder 106 is flush with the bottom surface of the insertion interface 1051, so that the conductive cylinder 106 and the insertion interface 1051 are connected. The conductive cylinder 106 has a first accommodating space 1061 and a second accommodating space 1062 at its upper and lower ends, respectively. The first accommodating space 1061 and the second accommodating space 1062 are connected by a connecting channel 1063. The axes of the first accommodating space 1061, the second accommodating space 1062 and the connecting channel 1063 coincide. In addition, it should be noted that the inner diameter of the connecting channel 1063 is smaller than the inner diameter of the first accommodating space 1061, and both the first accommodating space 1061 and the second accommodating space 1062 are provided with elastic electrode rings.

[0032] The upper end of the first insulating conductive rod 107 is located inside the insulating connecting cylinder 105, and the lower end of the first insulating conductive rod 107 extends to the outside of the insulating connecting cylinder 105. The first insulating conductive rod 107 includes a first conductive rod 1071 coaxial with the second receiving space 1062. The diameter of the first conductive rod 1071 is the same as the inner diameter of the second receiving space 1062, and the upper insertion section of the first conductive rod 1071 is inserted into the second receiving space 1062. A threaded hole is opened axially at the center position of the end face of the insertion section of the first conductive rod 1071. The body of the tension screw 113 passes through the connecting channel 1063 and is threadedly connected to the first conductive rod 1071. The nut of the tension screw 113 is located inside the first receiving space 1061 and abuts against the bottom surface of the first receiving space 1061. The first insulating conductive rod 107 is fixed to the conductive cylinder 106 by the tension screw 113.

[0033] The lower end of the first conductive rod 1071 is welded with a coaxial first connecting cylinder 1072, such as... Figure 4 As shown, the opening direction of the first connecting cylinder 1072 is opposite to that of the first conductive rod 1071, and the diameter of the first connecting cylinder 1072 is larger than the diameter of the first conductive rod 1071. The exposed section of the first conductive rod 1071 is also covered with a first insulating layer 1073. In this embodiment, the material of the first insulating layer 1073 is polyetheretherketone (PEEK). The upper part of the first insulating layer 1073 is attached to the insulating connecting cylinder 105, and three O-ring seals are provided between them.

[0034] The three-phase armored cable 109 in the well penetrates the entire lower sealing block 103 at the center of the end face of the lower sealing block 103 in the vertical direction and is distributed into three independent underground cables 110. The free end of the underground cable 110 forms a stripped end and is inserted into the first connecting tube 1072 to realize the connection between the junction box 1 and the underground cable.

[0035] like Figure 4 As shown, the first insulating conductive rod 107 near the first connecting cylinder 1072 and the downhole cable 110 near the first connecting cylinder 1072 are both covered by a first insulating reinforcement layer 108. In this embodiment, the first insulating reinforcement layer 108 comprises three layers: an inner layer of polytetrafluoroethylene pressure-sensitive tape, a middle layer of polytetrafluoroethylene pressure-sensitive tape, and an outer layer of cold shrink tubing. The first insulating reinforcement layer 108 not only further improves the insulation and sealing effect at the connection between the first insulating conductive rod 107 and the downhole cable 110, but also ensures the stability of the connection and enhances the overall integrity between the two.

[0036] A vertical injection hole 1031 is provided in the lower sealing block 103. After the overall assembly of the junction box 1 is completed, epoxy resin is injected into the main body housing 101 through the injection hole 1031 to fill the internal space of the main body housing 101, forming a solid seal 111. On the one hand, it can support the main body housing 101 and effectively enhance the deformation resistance of the main body housing 101. On the other hand, it separates the three downhole cables 110 and their matching positioning cylinder 104 and their internal components to prevent interference between them.

[0037] like Figure 3 As shown, the main body housing 101 has a limiting member on its side. The limiting member includes four clamping plates 112 evenly distributed on both sides of the main body housing 101. A gap is left between the clamping plates 112 on the same side to form a limiting groove. In this embodiment, two sets of limiting members are provided and are spaced apart from each other. The binding strap (such as a cable tie) passes through the limiting grooves on both sides to bind and fix the junction box 1 to the oil pipe.

[0038] like Figure 6 , Figure 7 As shown, the upper plug 2 includes a connecting tube 201 with a circular cross-section. In this embodiment, a connector 202 is fitted onto the upper end of the connecting tube 201. The connector 202 has hollow cylindrical openings at both ends. The upper end of the connecting tube 201 is inserted into the lower opening of the connector 202 and threaded together. An O-ring seal is provided at the connection point. A connecting screw cap 203 is fitted onto the lower end of the connecting tube 201. An annular step is formed by the outward protrusion of the lower opening of the connecting tube 201, which limits the positioning of the connecting screw cap 203. The portion of the connecting screw cap 203 extending beyond the connecting tube 201 includes a threaded connection section in the middle of the connecting screw cap 203 and a sealing section at the bottom of the connecting screw cap 203. The threaded connection section in the middle of the connecting screw cap 203 has internal threads.

[0039] A second insulating conductive rod 204 is provided at the lower end of the internal cavity of the connecting tube 201. The second insulating conductive rod 204 includes a second conductive rod 2041 coaxial with the connecting tube 201. The lower end of the second conductive rod 2041 extends beyond the connecting screw cap 203 and forms a pin 2043 at the lower end. A second connecting cylinder 2042 coaxially is welded to the upper end of the second conductive rod 2041. The diameter of the second connecting cylinder 2042 is larger than the diameter of the second conductive rod 2041, and the opening direction of the second connecting cylinder 2042 is opposite to that of the second conductive rod 2041. The second conductive rod 2041 is covered with a second insulating layer 2044 except for the pin 2043. The second insulating conductive rod 204 is divided into an upper section, a middle section, and a lower section due to the different sizes of the second insulating layer 2044. The upper section of the second insulating conductive rod 204 is spaced from the cavity wall of the inner cavity of the connecting pipe 201. The middle section of the second insulating conductive rod 204 is threaded to the connecting pipe 201, and two O-ring seals are provided at the connection. The lower section of the second insulating conductive rod 204 is exposed at the lower end of the connecting pipe 201, and there is a gap between the lower section of the second insulating conductive rod 204 and the connecting screw cap 203.

[0040] The ground cable 205 passes through the connector 202 and extends into the connecting pipe 201. Its end has a stripped end that is inserted into the second connecting cylinder 2042, thus connecting the ground cable 205 to the upper plug 2. The end of the ground cable 205 furthest from the second connecting cylinder 2042 is wrapped with a steel pipe 206. A gap is left between the steel pipe 206 and the stripped end of the ground cable 205. A compression fitting 207 is fitted over the steel pipe 206, through which the ground cable 205 is connected, fixed, and sealed to the upper opening of the connector 202.

[0041] The second insulating conductive rod 204, near the connector 202, and the ground cable 205, away from the steel pipe 206, are covered with a second insulating reinforcement layer 208. In this embodiment, the second insulating reinforcement layer 208 comprises two layers: an inner layer of perfluoroethylene propylene pressure-sensitive tape and an outer layer of polytetrafluoroethylene pressure-sensitive tape. The second insulating reinforcement layer 208 effectively insulates and seals the connection between the ground cable 205 and the second connecting cylinder 2042, improving the strength and stability of the connection. Furthermore, it effectively protects both the second insulating conductive rod 204 and the ground cable 205.

[0042] During installation, first, assemble the junction box 1 and the upper plug 2 separately. Then, align the upper plug 2 with the junction box 1 and tighten the upper plug 2. That is, the external thread at the upper end of the positioning cylinder 104 engages with the internal thread in the threaded connection section of the connecting screw cap 203. During tightening, the pin 2043 passes through the upper insertion interface 1051 of the insulating connecting cylinder 105 and is inserted into the first receiving space 1061 at the upper end of the conductive cylinder 106. At the same time, the lower section of the second insulating conductive rod 204 is inserted into the insertion interface 1051 of the insulating connecting cylinder 105, thereby completing the connection between the junction box 1 and the upper plug 2. Finally, bind and fix the junction box 1 and the oil pipe. In addition, it should be further noted that there are two O-ring seals between the lower section of the second insulating conductive rod 204 and the insertion interface 1051 of the insulating connecting cylinder 105, and one O-ring seal between the bottom sealing section of the connecting screw cap 203 and the positioning cylinder 104.

[0043] By setting up junction box 1 and upper plug 2, on the one hand, the junction box 1, with its fan-shaped cross-section, can not only be tightly fixed to the outer wall of the oil pipe, but also adapt to the annular space between the oil pipe and the casing. The narrow upper plug 2, in conjunction with junction box 1, fundamentally solves the drawback of the specific shape and small area of ​​the annular surface, which makes it impossible to install conventional cable pullers. In addition, the oil pipe supports and fixes junction box 1, preventing the junction box from colliding with the inner oil pipe or the outer casing during oil extraction and causing damage. On the other hand, the connection between junction box 1 and upper plug 2 is stable, with good power transmission performance, and can replace conventional cable pullers. Moreover, its simple structure allows for rapid installation.

[0044] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A plug-in assembly for cable crossing, characterized in that, It includes a junction box fixedly connected to the side of the tubing and an upper plug that plugs into the junction box. The junction box is connected to the downhole cable, and the upper plug is connected to the surface cable. The junction box and the upper plug connect the downhole cable and the surface cable to form a passage. The junction box and the upper plug are located in the annular space between the tubing and the casing. The junction box is long and narrow with a fan-shaped cross-section. The inner side of the junction box that contacts the tubing is concave, thereby ensuring that the junction box and the tubing can fit together completely.

2. The plug-in assembly for cable crossing according to claim 1, characterized in that, The junction box includes a main housing. The upper and lower ends of the main housing are respectively provided with an upper sealing plate and a lower sealing block. The upper sealing plate has three evenly distributed positioning holes. The three positioning holes are arranged in an arc shape and partially surround the outside of the oil pipe. A positioning cylinder is provided in the positioning hole. The positioning cylinder and the upper sealing plate are connected and fixed by a locking sleeve. An insulating connecting cylinder is threaded inside the positioning cylinder. A conductive cylinder and a first insulating conductive rod are sequentially arranged in the vertical direction inside the insulating connecting cylinder.

3. The plug-in assembly for cable crossing according to claim 2, characterized in that, The lower end of the positioning cylinder extends into the interior of the main body housing, while the upper end of the positioning cylinder protrudes above the upper sealing plate. The upper end of the positioning cylinder is provided with an external thread, and the upper end of the insulating connecting cylinder forms a limiting step. The limiting step abuts against the outer end face of the positioning cylinder, thereby positioning the insulating connecting cylinder.

4. The plug-in assembly for cable crossing according to claim 3, characterized in that, The conductive cylinder is threadedly connected to the insulating connecting cylinder, and the outer wall of the conductive cylinder is in close contact with the inner wall of the insulating connecting cylinder. The upper end face of the conductive cylinder is flush with the bottom surface of the insertion interface, so that the conductive cylinder and the insertion interface are connected. The upper and lower ends of the conductive cylinder are respectively provided with a first accommodating space and a second accommodating space, and the first accommodating space and the second accommodating space are connected through a connecting channel.

5. The plug-in assembly for cable crossing according to claim 4, characterized in that, The upper end of the first insulating conductive rod is located inside the insulating connecting cylinder, and the lower end of the first insulating conductive rod extends to the outside of the insulating connecting cylinder. The first insulating conductive rod includes a first conductive rod, and the insertion section of the upper part of the first conductive rod is inserted into the second receiving space. A threaded hole is opened axially at the center position of the end face of the insertion section of the first conductive rod. The body of the tension screw passes through the connecting channel and is threadedly connected to the first conductive rod. The nut of the tension screw is located in the first receiving space and abuts against the bottom surface of the first receiving space. The first insulating conductive rod is fixed to the conductive cylinder by the tension screw.

6. The plug-in assembly for cable crossing according to claim 5, characterized in that, The lower end of the first conductive rod is provided with a first connecting cylinder with a coaxial axis. The opening direction of the first connecting cylinder is away from the first conductive rod. The three-phase armored cable in the well penetrates the entire lower sealing block at the center position of the lower sealing block end face in the vertical direction and is distributed into three independent underground cables. The free end of the underground cable forms a stripped end and is inserted into the first connecting cylinder to realize the connection between the junction box and the underground cable.

7. The plug-in assembly for cable crossing according to claim 6, characterized in that, The first insulating conductive rod at one end near the first connecting cylinder and the underground cable at one end near the first connecting cylinder are both covered with the first insulating reinforcement layer.

8. The plug-in assembly for cable crossing according to any one of claims 1 to 7, characterized in that, The upper plug includes a connecting tube, the upper end of which is fitted with a connector. The connector has two hollow cylindrical openings at both ends. The upper end of the connecting tube is inserted into the lower opening of the connector and threaded. The lower end of the connecting tube is fitted with a connecting screw cap. The lower opening of the connecting tube protrudes outward to form an annular step, which limits the connecting screw cap. The part of the connecting screw cap that extends beyond the connecting tube includes a threaded connection section in the middle of the connecting screw cap and a sealing section at the bottom of the connecting screw cap. The threaded connection section in the middle of the connecting screw cap has internal threads.

9. The plug-in assembly for cable crossing according to claim 8, characterized in that, The lower end of the cavity inside the connecting tube is provided with a second insulating conductive rod. The second insulating conductive rod includes a second conductive rod coaxial with the connecting tube. The lower end of the second conductive rod extends beyond the connecting screw cap and has a pin formed at the lower end. The upper end of the second conductive rod is provided with a second connecting cylinder coaxial with the second conductive rod. The opening direction of the second connecting cylinder is opposite to the second conductive rod. The ground cable passes through the connector and extends into the connecting tube. Its end has a stripping head and is inserted into the second connecting cylinder, thereby realizing the connection between the ground cable and the upper plug.

10. The plug-in assembly for cable crossing according to claim 9, characterized in that, The second insulating conductive rod is divided into an upper section, a middle section, and a lower section due to the different dimensions of the second insulating layer. The upper section of the second insulating conductive rod is spaced apart from the cavity wall inside the connecting tube. The middle section of the second insulating conductive rod is threadedly connected to the connecting tube. The lower section of the second insulating conductive rod protrudes from the lower end of the connecting tube and is spaced apart from the connecting screw cap.

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