A Sealing and Insulating Structure for a Large Current Subsurface Female Connector

Abstract

The present invention discloses a sealing and insulating structure for an underground high-current bus joint, which includes an outer tube (1). A group of live rings (2) evenly distributed along the axial direction are arranged inside the outer tube. Sealing and insulating rings (3) are provided at both the upper and lower ends of each live ring; a connecting ear (4) is provided on one side of each live ring, and the connecting ears on a group of live rings are arranged in a triangular shape; a wiring hole (5) is provided on each connecting ear; a wire (6) is inserted into the wiring hole, and the wire and the wiring hole are first crimped and then welded; the other ends of the wires connected to each live ring respectively pass through the wire passing holes (8) of their respective sector-shaped insulating plates (7) and are led out from the top of the outer tube. The present invention uses multiple sector-shaped insulating plates to be spliced into a cylindrical structure, which improves the processability, installation operability and reliability of the product; the key positions such as joints are further insulated by pouring insulating glue; the outer tube is connected to the upper body by hanging nails, which can greatly reduce the wall thickness of the outer tube and leave enough space for the sector-shaped insulating plates.

Description

Technical Field

[0001] The present invention relates to a sealing and insulating structure for an underground large-current female joint, belonging to the technical field of underground instrument structures. Background Art

[0002] In the fields of oil and gas field or coal mine exploration, geothermal logging, and ocean survey, processes such as underground wet docking are often used to supply power to underground instruments for construction operations such as logging, perforation, and coring. The underground live wet joint needs to solve the problems of reliable power supply and long-term sealing and insulation. For existing multi-core wet joints, due to various factors such as the outer diameter of the instrument and the outer diameter of the wire, the structure is relatively complex and the reliability is not satisfactory. Therefore, there are still deficiencies in the existing technology and it needs to be further improved. Summary of the Invention

[0003] The purpose of the present invention is to provide a sealing and insulating structure for an underground large-current female joint to achieve reliable large-current power supply between multiple groups of large-diameter wires and live rings, thereby overcoming the deficiencies of the existing technology.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A sealing and insulating structure for an underground large-current female joint of the present invention includes an outer tube. A group of live rings are evenly distributed along the axial direction inside the outer tube, and sealing and insulating rings are provided at both the upper and lower ends of each live ring; a connecting ear is provided on one side of each live ring, and the connecting ears on a group of live rings are arranged in a triangle; a wiring hole is provided on each connecting ear; a wire is inserted into the wiring hole, and the wire is first crimped and then welded to the wiring hole; the other ends of the wires connected to each live ring respectively pass through the wire-passing holes of their respective sector-shaped insulating plates and are led out from the top of the outer tube.

[0006] In the above-mentioned sealing and insulating structure for an underground large-current female joint, a wiring groove is provided at the position corresponding to the connecting ear on the sector-shaped insulating plate, and insulating glue is injected into the wiring groove.

[0007] In the above-mentioned sealing and insulating structure for an underground large-current female joint, the top end of the sector-shaped insulating plate is connected to the upper body through a group of screws, and the bottom end of the sector-shaped insulating plate is connected to the lower body through a group of screws.

[0008] In the above-mentioned sealing and insulating structure for an underground large-current female joint, the live ring and the sealing and insulating ring are sealed and connected through a trapezoidal ring groove.

[0009] In the above-mentioned sealing and insulating structure for an underground large-current female joint, the top end of the outer tube is connected to the upper body through a group of hanging nails, the bottom end of the outer tube is threadedly connected to the cone head, and the upper end of the cone head is inserted into the lower body.

[0010] In the above-mentioned sealing and insulating structure for underground large-current bus joints, sealing rings are provided at the connection between the outer tube and the upper body and at the connection between the tapered head and the lower body.

[0011] Due to the adoption of the above technical solutions, compared with the prior art, the present invention uses multiple sector-shaped insulating plates spliced into a cylindrical structure, which improves the processability, installation operability and reliability of the product; the sector-shaped insulating plates are made of high-strength insulating materials to ensure the sealing strength at the grooves on both sides of the live ring; and the insulation between the live ring and the outer tube and between the wire and the outer tube is ensured; the key positions such as the joints are further insulated by potting insulating glue; the outer tube is connected to the upper body by hanging nails, canceling the original threaded connection structure, which can greatly reduce the wall thickness of the outer tube and leave enough space for the sector-shaped insulating plates. The present invention is particularly applicable to relevant structures for supplying power to underground instruments using processes such as underground wet butt joints. Brief Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of the present invention;

[0013] Figure 2 is Figure 1 the A-A sectional structural diagram of

[0014] Figure 3 is Figure 1 the B-B sectional structural diagram of

[0015] Figure 4 is Figure 1 the C-C sectional structural diagram of

[0016] Figure 5 is Figure 1 the D-D sectional structural diagram of

[0017] Figure 6 is Figure 1 the E-E sectional structural diagram of

[0018] Figure 7 is Figure 1 the F partial enlarged structural diagram of

[0019] Figure 8 is the three-dimensional diagram of the present invention with the outer tube and one sector-shaped insulating plate removed;

[0020] Figure 9 is the connection diagram of the live ring and the wire of the present invention;

[0021] Figure 10 is the schematic diagram of the spaced arrangement of the live ring and the sealing insulating ring of the present invention;

[0022] Figure 11 is the structural diagram of the sector-shaped insulating plate of the present invention;

[0023] Figure 12 It is a schematic diagram of the outer tube of the present invention.

[0024] The reference signs in the drawings are: 1 - outer tube, 2 - live ring, 3 - sealing insulating ring, 4 - connecting ear, 5 - wiring hole, 6 - wire, 7 - sector insulating plate, 8 - wire passing hole, 9 - wiring groove, 10 - insulating glue, 11 - screw, 12 - upper body, 13 - lower body, 14 - trapezoidal ring groove, 15 - hanging nail, 16 - tapered head, 17 - sealing ring, 18 - screw hole, 19 - hanging nail hole. Detailed implementation manners

[0025] The present invention will be further described in detail below with reference to the drawings and embodiments.

[0026] A sealing and insulating structure for an underground high - current bus connector of the present invention, as Figures 1 to 12 shown, includes an outer tube 1. A group of live rings 2 evenly distributed along the axial direction are arranged inside the outer tube 1. Sealing insulating rings 3 are provided at both the upper and lower ends of each live ring 2; A connecting ear 4 is provided on one side of each live ring 2, and the connecting ears 4 on a group of live rings 2 are arranged in a triangle; A wiring hole 5 is provided on each connecting ear 4; A wire 6 is inserted into the wiring hole 5, and the wire 6 is first crimped and then welded to the wiring hole 5; The other ends of the wires 6 connected to each live ring 2 respectively pass through the wire passing holes 8 of their respective sector insulating plates 7 and are led out from the top of the outer tube 1. Wiring grooves 9 are provided at positions corresponding to the connecting ears 4 on the sector insulating plates 7, and insulating glue 10 is injected into the wiring grooves 9. The top end of the sector insulating plate 7 is connected to the upper body 12 through a group of screws 11, and the bottom end of the sector insulating plate 7 is connected to the lower body 13 through a group of screws 11. The live ring 2 and the sealing insulating ring 3 are hermetically connected through a trapezoidal ring groove 14. The top end of the outer tube 1 is connected to the upper body 12 through a group of hanging nails 15, the bottom end of the outer tube 1 is threadedly connected to the tapered head 16, and the upper end of the tapered head 16 is inserted into the lower body 13; Sealing rings 17 are provided at the connection between the outer tube 1 and the upper body 12 and at the connection between the tapered head 16 and the lower body 13. Embodiment

[0027] In this example, as Figures 1 to 12 shown, taking the sealing and insulating structure for a high - current bus connector connecting three wires as an example, the present invention will be described in detail.

[0028] In this example, three charged rings 2 are adopted. The three charged rings 2 are evenly distributed along the axial direction of the outer tube 1. Both ends of the three charged rings 2 are separated by sealed insulating rings 3. Sealed insulating rings 3 are also provided above the top charged ring 2 and below the bottom charged ring 2. The charged ring 2 made of metal structure and the sealed insulating ring 3 made of non-metal structure are pressed and connected into an integral sealed structure by a trapezoidal ring groove 14. Each charged ring 2 is provided with a connecting ear 4 for connecting with the wire 6. The connecting ears 4 on the three charged rings 2 are arranged staggeredly, and the top view positions of the three connecting ears 4 are arranged in a triangular structure. The copper core of the wire 6 passes through the wiring hole 5 on the connecting ear 4 and is first crimped and then welded to the wiring hole 5 to ensure reliable connection. The three wires 6 respectively pass out from the top of the wire passing holes 8 on the sector insulating plate 7. The sector insulating plate 7 is provided with a wiring groove 9. The connecting ear 4 on one side of the charged ring 2 is inserted into the wiring groove 9 and then connected to the connecting ear 4. After connection, the wiring groove 9 is filled with insulating glue 10 to ensure insulation and stability at the joint. The three sector insulating plates 7 are combined into a cylindrical shape. Both the upper and lower ends of the sector insulating plate 7 are provided with screw holes 18. The upper end of the combined cylindrical sector insulating plate 7 is connected to the upper body 12 by screws 11, and the lower end is connected to the lower body 13 by screws 11. The screws 11 are countersunk screws. After the screws 11 are tightened, they should be lower than the outer circle of the cylinder to facilitate the installation of the outer tube 1. The lower end of the outer tube 1 is provided with an internal thread, and the upper end of the taper head 16 is provided with an external thread. The upper end of the taper head 16 is threadedly connected to the lower end of the outer tube 1, and a set of sealing rings 17 are provided at the connection. The lower end of the combined cylindrical sector insulating plate 7 is inserted from the upper end of the outer tube 1, and the hanging hole 19 at the upper end of the outer tube 1 is connected to the upper body 12 through a hanging nail 15.

[0029] When connecting the wires, strip the insulating skins of the three wires 6 successively by corresponding lengths, then insert one end of the wire 6 into the middle hole of the upper body 12 and pass through the wire passing holes 8 on the three corresponding sector insulating plates 7 until it passes out from the corresponding wiring groove 9 on the sector insulating plate 7; then combine the three sector insulating plates 7 into a cylindrical shape, and reliably connect the copper core of the wire 6 with the connecting ear 4 on the corresponding charged ring 2; after connection, pour and seal insulating glue 10 into the wiring groove 9; fix the two ends of the three sector insulating plates 7 to the upper body 12 and the lower body 13 respectively by screws 11; finally, put on the outer tube 1 and screw on the hanging nail 15 and the taper head 16.

[0030] Due to the adoption of the above technical solutions, this invention patent has the following characteristics:

[0031] 1. The circumferential three-lobe spliced insulating plate greatly simplifies the entire sealed insulating structure, improving the processability, installation operability and reliability of the entire structure;

[0032] 2. The three sector insulating plates are made of high-strength materials to ensure the sealing strength at the two sides of the charged ring groove;

[0033] 3. The three sector-shaped insulating plates are made of non-metallic materials to ensure the insulation between the live ring and the outer tube, and between the copper core and the outer tube. Insulating glue is potted at key positions to further improve the insulation performance.

[0034] 4. The upper end of the outer tube is connected to the upper body using hanging nails, canceling the original threaded connection structure at this place, significantly reducing the wall thickness on the left side of the outer tube, and leaving enough space for the insulating plate.

[0035] The invention is applicable to the sealing insulation structure of large current downhole female connectors, and is particularly applicable to related structures that supply power to downhole instruments using processes such as downhole wet docking, belonging to the technical field of downhole instrument structures.

Claims

1. A sealing and insulating structure for an underground high-current bus connector, comprising an outer tube (1), characterized in that: A group of live rings (2) evenly distributed along the axial direction are arranged inside the outer tube (1), and sealing and insulating rings (3) are arranged at both the upper and lower ends of each live ring (2); A connecting ear (4) is arranged on one side of each live ring (2), and the connecting ears (4) on a group of live rings (2) are arranged in a triangle; A wiring hole (5) is arranged on each connecting ear (4); A wire (6) is inserted into the wiring hole (5), and the wire (6) is first crimped and then welded to the wiring hole (5); The other ends of the wires (6) connected to each live ring (2) respectively pass through the wire passing holes (8) of their respective sector-shaped insulating plates (7) and are led out from the top of the outer tube (1); A wiring groove (9) is arranged at the position corresponding to the connecting ear (4) on the sector-shaped insulating plate (7), and insulating glue (10) is injected into the wiring groove (9); The top end of the sector-shaped insulating plate (7) is connected to the upper body (12) through a group of screws (11), and the bottom end of the sector-shaped insulating plate (7) is connected to the lower body (13) through a group of screws (11); The top end of the outer tube (1) is connected to the upper body (12) through a group of hanging nails (15), the bottom end of the outer tube (1) is threadedly connected to the cone head (16), and the upper end of the cone head (16) is inserted into the lower body (13); Sealing rings (17) are arranged at the connection between the outer tube (1) and the upper body (12) and at the connection between the cone head (16) and the lower body (13).

2. The sealing and insulating structure for an underground high-current bus connector according to claim 1, characterized in that: The live ring (2) and the sealing and insulating ring (3) are hermetically connected through a trapezoidal ring groove (14).

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