Self-cleaning waterproof annular electric connector

Abstract

The invention discloses a self-cleaning waterproof annular electric connector, and relates to the technical field of electric connectors, the self-cleaning waterproof annular electric connector comprises an annular connector used for connecting an inner pipe and an outer pipe and a hole-shaped connector, the annular connector is installed at the outer end of the inner pipe, and the hole-shaped connector is installed in one end of the outer pipe. After the inner pipe and the outer pipe are connected in an inserted mode, the annular connector is inserted into the hole-shaped connector. The annular connector comprises an insulation base body a, and a plurality of cleaning rubber rings and water absorption rubber rings which are distributed at equal intervals are embedded in the outer wall of the insulation base body a. In the plugging process of the annular connector and the hole-type connector, the cleaning rubber ring is used for scraping mud on the inner wall of the hole-type connector, the water absorption rubber ring is used for wiping water, so that dryness of the interior of the electric connector is guaranteed, short circuit is avoided, meanwhile, the cleaning operation is synchronously achieved in the plugging process of the electric connector, the operation is simple, and the working efficiency is improved. And the use convenience is high, and the cleaning work before insertion is reduced, so that the working efficiency is obviously improved.

Description

Technical Field

[0001] The invention relates to the technical field of electric connectors, in particular to a self-cleaning waterproof annular electric connector. Background Art

[0002] An electrical connector is an electromechanical component used to connect electrical circuits. Its main functions include transmitting signals, connecting devices, protecting circuits, and facilitating maintenance. It can ensure that current, voltage, optical signals, etc. are not distorted during transmission, and connect different electronic devices, components, and equipment. According to the shape of the interface, it can be divided into annular electrical connectors and rectangular electrical connectors, such as an electrical connector with prior art publication number CN107293895B and a quick-plug waterproof circular electrical connector with publication number CN105244687B. Annular electrical connectors are widely used in many industries, especially in drilling and exploration industries, where power needs to be transmitted between internal and external pipelines. The finished products of existing pipelines are generally limited in length. Therefore, during the construction process, pipelines need to be connected in order to achieve a longer transmission distance.

[0003] The use of annular electrical connectors can solve the problem of non-directional plug-in connection of pipelines and realize electrical transmission. Although the internal seamless steel pipe can ensure sealing when plugged in, when the two sections of the steel pipe are separated, the mud in the pipeline will splash onto the annular connector. If it is not cleaned before the next use, it will cause an electrical short circuit after plugging in. If you want to avoid the above situation, you need to manually clean the mud splashed inside the annular connector before each use. Due to the limited internal space of the annular connector, special cleaning tools are required for manual cleaning, which is time-consuming and labor-intensive. This causes great inconvenience to the actual use of each cleaning operation. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a self-cleaning waterproof annular electrical connector. Through the arrangement of the annular connector and the hole-type connector, the cleaning operation can be simultaneously implemented during the plug-in process of the electrical connector. This not only makes the operation simple, but also reduces the cleaning work before plug-in, thereby improving work efficiency and bringing great convenience to the use of the present invention.

[0005] To achieve the above object, the technical solution adopted by the present invention is: a self-cleaning waterproof annular electrical connector, comprising an annular connector and a hole-type connector for connecting an inner tube and an outer tube, wherein the annular connector is installed at the outer end of the inner tube, and the hole-type connector is installed inside one end of the outer tube, and after the inner tube and the outer tube are plugged together, the annular connector is inserted inside the hole-type connector; The annular connector comprises an insulating base a, which is made by injection molding technology, and the injection molding material of the insulating base a is polyetheretherketone (PEEK) material, and the outer wall of one end of the insulating base a close to the outer tube is inlaid with a plurality of cleaning rubber rings and a plurality of water-absorbing rubber rings distributed at equal intervals, and the water-absorbing rubber ring is located on the side of the cleaning rubber ring away from the outer tube; The hole-type connector includes an insulating base b, which is made by injection molding technology. The injection molding material of the insulating base b is polyetheretherketone (PEEK) material. The end of the insulating base b close to the inner tube and the side of the cleaning rubber ring facing the outer tube are both chamfered, which is used to squeeze the cleaning rubber ring at one end of the insulating base b to scrape off the mud on the inner wall of the insulating base b and squeeze the water-absorbing rubber ring to absorb the moisture on the inner wall of the insulating base b when the insulating base a is inserted into the insulating base b.

[0006] In a preferred embodiment, the annular connector further comprises a plurality of contacts a, the contacts a are made of brass material after gold plating, the contact a as a whole is annular in structure, the contact a is fixed on the outer wall of the insulating substrate a by injection molding, a copper sheet a is fixed on one side of the contact a, and the copper sheet a extends from one end of the insulating substrate a away from the outer tube; The end of the copper sheet a is provided with a through hole a for welding electric wires.

[0007] In a preferred embodiment, the female connector further comprises a plurality of contacts b, which are fixed on the inner wall of the insulating substrate b by injection molding, and the plurality of contacts b are evenly spaced, the inner diameter of the insulating substrate b is consistent with the inner diameter of the contacts b, and there shall be no gap between the contact surfaces of the contacts b and the insulating substrate b; A copper sheet b is fixed at one end of the contact piece b. The copper sheet b extends from one end of the insulating substrate b away from the inner tube. A through hole b is opened at one end of the copper sheet b for welding the wire.

[0008] In a preferred embodiment, the outer wall of the contact a is processed with a drum spring installation groove, and a drum spring contact is installed in the drum spring installation groove. After the annular connector and the hole connector are plugged together, the contact b squeezes the drum spring contact to generate deformation, which is used to strengthen the connection between the annular connector and the hole connector. The drum spring contact is made of elastic metal, specifically, a beryllium bronze metal sheet is bent, and then vacuum aging and gold-plated. The inner diameter of the drum spring contact is smaller than the outer diameter of the drum spring mounting groove so that the drum spring contact is fixed on the contact a.

[0009] In a preferred embodiment, the water-absorbing rubber ring is made of a hydrophilic material, such as water-absorbing cotton, and the cleaning rubber ring is made of a high-hardness rubber material.

[0010] In a preferred embodiment, a plurality of sealing rings a distributed at equal intervals are fixed to the outer wall of the inner tube, and after the annular connector and the hole-type connector are plugged in, the inner wall of the outer tube is sealed by squeezing the sealing rings a.

[0011] In a preferred embodiment, a sealing ring b is fixed to the outer wall of the insulating substrate a. The sealing ring b is located on the side of the water-absorbing rubber ring away from the cleaning rubber ring and is used to be squeezed by the contact piece b to achieve sealing after the annular connector and the hole connector are plugged together.

[0012] In a preferred embodiment, the outer wall of the insulating substrate a is provided with a plurality of grooves a for mounting the contact piece a, the sealing ring b, the water-absorbing rubber ring, and the cleaning rubber ring; The inner wall of the insulating base b is provided with a plurality of grooves b, the contact piece b is installed inside some of the grooves b, and after the annular connector and the hole-type connector are plugged in, the water-absorbing rubber ring and the cleaning rubber ring are located inside one of the grooves b to prevent the insulating base b from squeezing the water-absorbing rubber ring and the cleaning rubber ring.

[0013] In a preferred embodiment, a clamping ring is provided on the outer wall of the inner tube, and the annular connector is fixed to the outer wall of the inner tube via the clamping ring, and the clamping ring is located on the side of the sealing ring a away from the outer tube.

[0014] In a preferred embodiment, a screw ring is provided inside the opening of one end of the outer tube facing the inner tube, and the hole-type connector is fixed to the inner wall of the outer tube by the screw ring.

[0015] Compared with the prior art, the present invention provides a self-cleaning waterproof annular electrical connector, which has the following beneficial effects: 1. In view of the inconvenience caused by manually cleaning the mud inside the electrical connector in the prior art, the annular connector and the hole-type connector in the present invention can not only realize the function of connecting the inner tube and the outer tube, but also can use the cleaning rubber ring to scrape off the mud on the inner wall of the hole-type connector during the plug-in process of the annular connector and the hole-type connector, and use the water-absorbing rubber ring to wipe off the moisture, so as to ensure the dryness of the inside of the electrical connector and avoid short circuit. At the same time, the cleaning operation is synchronously realized during the plug-in process of the electrical connector, which is not only simple to operate, but also reduces the cleaning work before plug-in, improves work efficiency, and also brings great convenience to the use of the present invention.

[0016] 2. The present invention realizes sealing by squeezing the sealing ring a through the inner wall of the outer tube after insertion, and squeezing the sealing ring b in the annular connector through the inner wall of the hole-type connector after insertion, which is beneficial to prevent the inner wall of the outer tube from being damp after being wiped dry, thereby improving safety.

[0017] 3. The present invention realizes the connection between the fixed annular connector and the female connector by utilizing the drum spring contact in the annular connector to squeeze the inner wall of the female connector. Under the setting of the drum spring contact, the annular connector and the female connector in the present invention can be fixed with the help of the drum spring contact after being plugged in any direction. That is, the present invention has the characteristic of non-directional plug-in connection, which can further improve the convenience of the present invention when used. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the inner tube and the outer tube after being plugged in using the ring connector and the hole connector; Figure 2 It is a schematic diagram of the process of plugging the inner tube and the outer tube using the ring connector and the hole connector; Figure 3 It is a schematic diagram of the annular connector of the present invention being installed on the outer wall of the inner tube and the hole-type connector being installed inside the outer tube; Figure 4 It is a schematic diagram of the structure of the annular connector of the present invention; Figure 5 It is a schematic diagram of the structure of the hole type connector of the present invention; Figure 6 It is a three-dimensional diagram of the annular connector and the hole-type connector of the present invention; Figure 7 is a schematic diagram of an insulating substrate b and a groove b of the present invention; Figure 8 is a schematic diagram of an insulating substrate a and a groove a of the present invention; Fig. 9 It is a schematic diagram of the structure of the contact piece a and the copper sheet a of the present invention; Fig.10 for Fig. 9 Schematic diagram of the middle contact a and the copper sheet a in the AA direction; Fig.11 It is a schematic structural diagram of a drum spring contact member of the present invention; Fig.12 for Fig.11 BB direction schematic diagram of the middle drum spring contact; Fig.13 It is a schematic diagram of the drum spring contact of the present invention being installed behind the outer wall of the contact member a; Fig.14 for Fig.13 Schematic diagram of the CC direction of the drum spring contact; Fig.15 It is a cross-sectional view of the water-absorbing rubber ring of the present invention; Fig.16 is a cross-sectional view of the cleaning rubber ring of the present invention; Fig.17 is a cross-sectional view of the contact member b and the copper sheet b of the present invention; Fig.18 for Fig.17 Schematic diagram of the DD direction of the middle contact b and the copper sheet b.

[0019] In the figure: 1. Ring connector; 2. Hole connector; 3. Inner tube; 4. Clamp ring; 5. Outer tube; 6. Screw ring; 7. Sealing ring a; 11. Contact piece a; 111. Copper sheet a; 112. Drum spring mounting groove; 12. Drum spring contact piece; 13. Sealing ring b; 14. Water-absorbing rubber ring; 15. Cleaning rubber ring; 16. Insulating substrate a; 17. Groove a; 21. Contact piece b; 211. Copper sheet b; 22. Insulating substrate b; 23. Groove b. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] In order to address the shortcomings of the existing technology, such as Figure 1-3 As shown, the present invention provides a self-cleaning waterproof annular electrical connector, comprising an annular connector 1 and a hole-type connector 2 for connecting an inner tube 3 and an outer tube 5, the outer wall of the inner tube 3 is provided with a clamping ring 4, the annular connector 1 is fixed to the outer wall of the inner tube 3 by the clamping ring 4, and the outer wall of the inner tube 3 is fixed with a plurality of sealing rings a7 distributed at equal intervals, after the annular connector 1 and the hole-type connector 2 are plugged in, the inner wall of the outer tube 5 is sealed by squeezing the sealing ring a7, the clamping ring 4 is located on the side of the sealing ring a7 away from the outer tube 5, and a screw ring 6 is provided inside the opening of one end of the outer tube 5 facing the inner tube 3, and the hole-type connector 2 is fixed to the inner wall of the outer tube 5 by the screw ring 6.

[0022] Among them, Figure 4 and Figure 6 As shown, the annular connector 1 includes an insulating base a16, a contact a11, a drum spring contact 12, a sealing ring b13, a water-absorbing rubber ring 14 and a cleaning rubber ring 15. The insulating base a16 is made by injection molding technology. The injection molding material of the insulating base a16 is polyetheretherketone (PEEK). PEEK is a high-performance thermoplastic polymer with good high temperature resistance, high strength, chemical corrosion resistance, and electrical insulation performance. The insulating base a16 prepared by PEEK can meet the requirements of electrical connectors for strength, electrical insulation, and high temperature resistance. Figure 8As shown, the outer wall of the insulating substrate a16 is also provided with a plurality of grooves a17 for mounting the contact piece a11, the sealing ring b13, the water-absorbing rubber ring 14, and the cleaning rubber ring 15. The contact piece a11 is fixed on the outer wall of the insulating substrate a16 by injection molding, and the number of the contact pieces a11 is multiple, and the multiple contact pieces a11 are evenly spaced. The contact piece a11 is made of brass material and is gold-plated. Fig. 9 , Fig.10 As shown, the contact piece a11 is an annular structure as a whole, and a flat copper sheet a111 is fixed on one side of the contact piece a11. The copper sheet a111 extends from one end of the insulating base a16 away from the outer tube 5, and a through hole a is opened at the end of the copper sheet a111. The setting of the through hole a helps to weld the wire and the copper sheet a111 together.

[0023] Further, such as Figure 9-14 As shown, a drum spring installation groove 112 is processed on the outer wall of the contact piece a11, and the drum spring contact piece 12 is installed in the drum spring installation groove 112. After the annular connector 1 and the hole-type connector 2 are plugged in, the contact piece b21 squeezes the drum spring contact piece 12 to produce deformation, which is used to strengthen the connection between the annular connector 1 and the hole-type connector 2; and the drum spring contact piece 12 is made of elastic metal. In this embodiment, beryllium bronze is selected. Beryllium bronze is a Wuxi bronze with beryllium as the main alloy component. Beryllium bronze has high hardness, elastic limit, fatigue limit and wear resistance. It also has good corrosion resistance, thermal conductivity and electrical conductivity. It does not generate sparks when impacted and has high safety. The drum spring contact piece 12 is made of a metal sheet made of beryllium bronze, and its cross-sectional shape is as follows: Fig.12 As shown, it is then vacuum aging treated and gold-plated, and the inner diameter of the drum spring contact 12 is smaller than the outer diameter of the drum spring mounting groove 112. After the annular connector 1 and the female connector 2 are plugged in, the bulging part of the drum spring contact 12 is squeezed by the inner wall of the female connector 2, so that the drum spring contact 12 can use its own elastic force to apply pressure to the inner wall of the female connector 2, so as to achieve the effect of fixing the annular connector 1 and the female connector 2.

[0024] The water absorbing rubber ring 14 and the cleaning rubber ring 15 are located on the outer wall of one end of the insulating substrate a16 close to the outer tube 5. Figure 4 The water-absorbing rubber ring 14 and the cleaning rubber ring 15 are both provided in multiple numbers, and the multiple cleaning rubber rings 15 are evenly spaced and the multiple water-absorbing rubber rings 14 are evenly spaced. The water-absorbing rubber ring 14 is located on the side of the cleaning rubber ring 15 away from the outer tube 5. The shape of the water-absorbing rubber ring 14 is as shown in FIG. Fig.15As shown, the absorbent rubber ring 14 is made of hydrophilic material, such as absorbent cotton, which is a fiber material with excellent water absorption performance, usually made of pure cotton or a blend of cotton and synthetic fibers, and has excellent water absorption performance. The cleaning rubber ring 15 is made of high-hardness rubber material so that it can use its own hardness to scrape off the mud stuck on the inner wall of the hole-type connector 2. The shape of the cleaning rubber ring 15 is as shown in FIG. Fig.16 shown.

[0025] like Figure 5-7 As shown, the hole-type connector 2 includes an insulating base b22 and a plurality of contacts b21. The inner wall of the insulating base b22 is provided with a plurality of grooves b23. The contacts b21 are installed inside some of the grooves b23. The insulating base b22 is made by injection molding technology. The injection molding material of the insulating base b22 is polyetheretherketone (PEEK). The insulating base b22 made of this material can meet the requirements of the electrical connector for strength, electrical insulation, and high temperature resistance. The contacts b21 are fixed on the inner wall of the insulating base b22 by injection molding. The plurality of contacts b21 are evenly spaced. The inner diameter of the insulating base b22 is consistent with that of the contacts b21, and there shall be no gap between the contact surfaces of the contacts b21 and the insulating base b22. Fig.17 and Fig.18 As shown, a copper sheet b211 is fixed at one end of the contact piece b21, and the copper sheet b211 extends from one end of the insulating base b22 away from the inner tube 3. A through hole b is opened at one end of the copper sheet b211 for welding wires.

[0026] Furthermore, the end of the insulating substrate b22 close to the inner tube 3 and the side of the cleaning rubber ring 15 facing the outer tube 5 are both processed with chamfers, such as Figure 7 and Fig.16 The chamfered setting can utilize the chamfered end of the insulating base b22 to squeeze the cleaning rubber ring 15 to scrape off the mud on the inner wall of the insulating base b22 and push the water absorbing rubber ring 14 to absorb the water on the inner wall of the insulating base b22 when the insulating base a16 is inserted into the insulating base b22.

[0027] In addition, it is worth noting that in this embodiment, the number of cleaning rubber rings 15 and the number of water absorbing rubber rings 14 are both set to two. Figure 4 The cleaning effect of the two cleaning rubber rings 15 and the cleaning effect of the two water absorbing rubber rings 14 can already meet the basic cleaning requirements. If the cleaning is difficult, the number of cleaning rubber rings 15 and water absorbing rubber rings 14 can be flexibly increased according to the actual situation, which is within the protection scope of the present invention.

[0028] When in use, the female connector 2 installed in the outer tube 5 is at the bottom, and the annular connector 1 installed on the inner tube 3 is at the top. When the connectors are separated, the mud in the inner tube 3 will splash onto the female connector 2.

[0029] When the annular connector 1 and the female connector 2 are plugged in: first, the cleaning rubber ring 15 of the annular connector 1 enters the inner wall of the female connector 2 through the guiding effect of the chamfer of the insulating base b22 in the female connector 2, and by squeezing the cleaning rubber ring 15, a certain positive pressure is generated to push the mud on the inner wall of the female connector 2 downward. After the action of the two cleaning rubber rings 15 in the present invention, the mud in the female connector 2 can be basically cleaned up; then, the water-absorbing rubber ring 14 in the annular connector 1 enters the inner wall of the female connector 2 through the guiding effect of the chamfer of the insulating base b22 in the female connector 2, and utilizes the water-absorbing characteristics of the water-absorbing rubber ring 14 to absorb the small amount of water stains remaining in the female connector 2. The two water-absorbing rubber rings 14 in the present invention can thoroughly clean the residual water stains in the female connector 2; then, a sealing ring b13 is fixed on the outer wall of the insulating base a16, and the sealing ring b13 is located on the side of the water-absorbing rubber ring 14 away from the cleaning rubber ring 15. The sealing ring b13 enters the inner wall of the female connector 2 through the guiding effect of the chamfer of the insulating base b22 in the female connector 2, and squeezes the sealing ring b13 through the inner wall of the insulating base b22 to compress the gap, forming a sealing effect, thereby preventing the discharged water vapor from returning and entering the interior of the connector; finally, the drum spring contact 12 fixed on the contact a11 is in contact with the contact b21, and reliable and stable contact is achieved through the pressure generated by the deformation of the drum spring contact 12.

[0030] The water-absorbing rubber ring 14 and the cleaning rubber ring 15 of the present invention clean the inside of the connector during the plugging process, eliminating the cleaning operation of the traditional connector before plugging, greatly improving work efficiency, and simplifying the operation, thereby improving the convenience of operation.

[0031] When the annular connector 1 and the female connector 2 are plugged in place, the cleaning rubber ring 15 and the water-absorbing rubber ring 14 of the annular connector 1 enter a groove b23 of the insulating base b22 on the female connector 2, so as to avoid squeezing the cleaning rubber ring 15 and the water-absorbing rubber ring 14 and affecting the cleaning effect when plugged in next time. After being plugged in place, the sealing ring a7 at the front end of the inner tube 3 and the inner wall of the outer tube 5 are squeezed to achieve a sealing function. The present invention strengthens the sealing effect under the joint action of the sealing ring b13 and the sealing ring a7, thereby improving the safety of the present invention when used.

[0032] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A self-cleaning waterproof annular electrical connector, characterized in that: It comprises a ring-shaped connector (1) and a hole-shaped connector (2) for connecting an inner tube (3) and an outer tube (5); The annular connector (1) comprises an insulating base a (16), wherein the outer wall of one end of the insulating base a (16) close to the outer tube (5) is inlaid with a plurality of cleaning rubber rings (15) distributed at equal intervals and a plurality of water-absorbing rubber rings (14) distributed at equal intervals, and the water-absorbing rubber rings (14) are located on a side of the cleaning rubber ring (15) away from the outer tube (5); The female connector (2) comprises an insulating base b (22), wherein an end of the insulating base b (22) close to the inner tube (3) and a side of the cleaning rubber ring (15) facing the outer tube (5) are both chamfered, so that when the insulating base a (16) is inserted into the insulating base b (22), the chamfered end of the insulating base b (22) is used to squeeze the cleaning rubber ring (15) to scrape off the mud on the inner wall of the insulating base b (22) and squeeze the water-absorbing rubber ring (14) to absorb the moisture on the inner wall of the insulating base b (22).

2. A self-cleaning waterproof annular electrical connector according to claim 1, characterized in that: The annular connector (1) further comprises a plurality of contact members a (11), wherein the contact members a (11) are fixed on the outer wall of the insulating base a (16), a copper sheet a (111) is fixed on one side of the contact members a (11), and the copper sheet a (111) extends from an end of the insulating base a (16) away from the outer tube (5); The end of the copper sheet a (111) is provided with a through hole a for welding electric wires.

3. A self-cleaning waterproof annular electrical connector according to claim 2, characterized in that: The female connector (2) further comprises a plurality of contact members b (21), wherein the contact members b (21) are fixed at equal intervals on the inner wall of the insulating base b (22), and the inner diameter of the insulating base b (22) is consistent with the inner diameter of the contact members b (21); A copper sheet b (211) is fixed to one end of the contact piece b (21), and the copper sheet b (211) extends from one end of the insulating base b (22) away from the inner tube (3). A through hole b is provided at one end of the copper sheet b (211) for welding electric wires.

4. A self-cleaning waterproof annular electrical connector according to claim 3, characterized in that: The outer wall of the contact piece a (11) is processed with a drum spring installation groove (112), and a drum spring contact piece (12) is installed in the drum spring installation groove (112); after the annular connector (1) and the hole connector (2) are plugged together, the contact piece b (21) squeezes the drum spring contact piece (12) to generate deformation, so as to strengthen the connection between the annular connector (1) and the hole connector (2); The drum spring contact piece (12) is made of elastic metal, and the inner diameter of the drum spring contact piece (12) is smaller than the outer diameter of the drum spring mounting groove (112), so as to fix the drum spring contact piece (12) on the contact piece a (11).

5. The self-cleaning waterproof annular electrical connector according to claim 1, characterized in that: The water-absorbing rubber ring (14) is made of a hydrophilic material, and the cleaning rubber ring (15) is made of a high-hardness rubber material.

6. A self-cleaning waterproof annular electrical connector according to claim 1, characterized in that: The outer wall of the inner tube (3) is fixed with a plurality of sealing rings a (7) distributed at equal intervals, and after the annular connector (1) and the hole-type connector (2) are plugged together, the sealing rings a (7) are squeezed by the inner wall of the outer tube (5) to achieve sealing.

7. A self-cleaning waterproof annular electrical connector according to claim 3, characterized in that: A sealing ring b (13) is fixed to the outer wall of the insulating base a (16). The sealing ring b (13) is located on a side of the water-absorbing rubber ring (14) away from the cleaning rubber ring (15) and is used to be squeezed by the contact piece b (21) to achieve sealing after the annular connector (1) and the hole connector (2) are plugged together.

8. A self-cleaning waterproof annular electrical connector according to claim 7, characterized in that: The outer wall of the insulating base a (16) is provided with a plurality of grooves a (17) for mounting the contact piece a (11), the sealing ring b (13), the water-absorbing rubber ring (14), and the cleaning rubber ring (15); The inner wall of the insulating base b (22) is provided with a plurality of grooves b (23), the contact member b (21) is installed inside some of the grooves b (23), and after the annular connector (1) and the hole-type connector (2) are plugged together, the water-absorbing rubber ring (14) and the cleaning rubber ring (15) are located inside one of the grooves b (23), so as to prevent the insulating base b (22) from squeezing the water-absorbing rubber ring (14) and the cleaning rubber ring (15).

9. A self-cleaning waterproof annular electrical connector according to claim 6, characterized in that: The annular connector (1) is mounted on the outer end of the inner tube (3); a clamping ring (4) is provided on the outer wall of the inner tube (3); the annular connector (1) is fixed to the outer wall of the inner tube (3) via the clamping ring (4); and the clamping ring (4) is located on a side of the sealing ring a (7) away from the outer tube (5).

10. The self-cleaning waterproof annular electrical connector according to claim 7, characterized in that: The hole-type connector (2) is installed inside one end of the outer tube (5); a screw ring (6) is provided inside the opening of one end of the outer tube (5) facing the inner tube (3); and the hole-type connector (2) is fixed to the inner wall of the outer tube (5) via the screw ring (6).

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