32-core coaxial electric connector plug for petroleum logging

Abstract

The utility model discloses a 32-core coaxial electric connector plug for petroleum logging, which is characterized in that an inner insulating base and an inner insulating covered bowl which are detachably butted are sleeved in a shielding cylinder, a plurality of first core needle holes are correspondingly formed in the inner insulating base and the inner insulating covered bowl in a penetrating manner, and the aperture is enlarged at the butting position to form two steps. The first core pin is inserted into the hole, and two first protruding blocks are arranged on the periphery of the first core pin and abut against the two steps in the hole respectively. The shielding cylinder is sleeved with an outer insulation base and an outer insulation covered bowl which are detachably connected in a butt joint mode, a plurality of second core needle holes are correspondingly formed in the outer insulation base and the outer insulation covered bowl in a penetrating mode, and the hole diameter is enlarged at the butt joint position to form two steps. The second core pin is inserted into the hole, and two second protruding blocks are arranged on the periphery of the second core pin and abut against the two steps in the hole respectively. The plug is designed to be detachable, so that the inner and outer insulating bases and the covered bowl as well as the inner and outer core needles can be conveniently detached. When the core pin is damaged, the core pin can be replaced independently, the connector plug does not need to be scrapped integrally, and the problem that cost is increased due to the fact that the core pin is difficult to replace and repair after being damaged is effectively solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrical connectors, and particularly relates to a 32-core coaxial electrical connector plug for oil logging. Background Art

[0002] In the field of oil exploration and development, logging technology, as an important means to obtain underground geological information, its accuracy and reliability are directly related to the subsequent evaluation of oil and gas resources and the formulation of exploitation strategies. With the increase of exploration depth and the increasing complexity of geological conditions, higher standards are put forward for the performance of logging instruments and their accessories. Among them, as a key component connecting the detection instrument and the signal processing unit in the logging system, the performance of the electrical connector directly affects the signal transmission quality and the accuracy of detection results. Coaxial electrical connectors are widely used in the process of oil logging due to their unique structural advantages. Through the coaxial structure between its inner and outer conductors, this type of connector can effectively suppress external electromagnetic interference, reduce signal attenuation, and effectively filter out impurity signals and currents, so as to ensure that the logging equipment can obtain clear and accurate current curves and provide a reliable basis for geological interpretation.

[0003] At present, the mainstream 32-core coaxial electrical connector plugs on the market generally adopt a forced interference fit structure to fix the core pins and the base body in design. Although this design ensures the connection stability and sealing performance to a certain extent, it also has significant deficiencies. Specifically, when some core pins are damaged due to long-term use or improper operation, it is extremely difficult or even impossible to replace the damaged core pins individually because of the tight interference fit between the core pins and the base body. In this case, in order to maintain the normal progress of logging work, users often have to scrap the entire electrical connector plug and replace it with a new one, resulting in waste of resources and increasing the cost of logging operations. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the utility model provides a 32-core coaxial electrical connector plug for oil logging, aiming to solve the problem of increased cost caused by difficult replacement and repair after the core pins are damaged.

[0005] In order to solve the above technical problems, the utility model is realized through the following technical solutions:

[0006] A 32-core coaxial electrical connector plug for oil logging, comprising a shielding cylinder, an inner insulating base and an inner insulating cover bowl which are detachably docked and sleeved inside the shielding cylinder. A number of first core pin holes are correspondingly and penetratingly formed on the inner insulating base and the inner insulating cover bowl, and the diameter of the first core pin holes becomes larger at the docking position of the inner insulating base and the inner insulating cover bowl to form two steps. First core pins are inserted into the first core pin holes, and two first bumps are arranged on the outer periphery of the first core pins, and the two first bumps respectively abut against the two steps in the first core pin holes;

[0007] An outer insulating base and an outer insulating cover bowl which are detachably docked are sleeved outside the shielding cylinder. A number of second core pin holes are correspondingly and penetratingly formed on the outer insulating base and the outer insulating cover bowl, and the diameter of the second core pin holes becomes larger at the docking position of the outer insulating base and the outer insulating cover bowl to form two steps. Second core pins are inserted into the second core pin holes, and two second bumps are arranged on the outer periphery of the second core pins, and the two second bumps respectively abut against the two steps in the second core pin holes;

[0008] The shielding cylinder, the inner insulating base, the inner insulating cover bowl, the outer insulating base and the outer insulating cover bowl are all coaxially arranged.

[0009] Further, the outer insulating base and the outer insulating cover bowl are detachably connected by bolts. A limiting step is arranged on the inner wall of the outer insulating base, and a limiting boss is arranged on the outer periphery of the shielding cylinder. The limiting boss is located at the limiting step, and the limiting boss is abutted against the limiting step by the outer insulating cover bowl.

[0010] Further, a number of first pin holes are radially formed on the outer walls of the inner insulating base and the inner insulating cover bowl. Second pin holes corresponding to the first pin holes are radially and penetratingly formed on the outer wall of the shielding cylinder. A groove corresponding to the second pin hole is axially formed on the inner wall of the outer insulating cover bowl. Limiting pins are inserted into the first pin holes and the second pin holes, and one end of the limiting pin abuts against the groove.

[0011] Further, a first insulating tube is sleeved on the outer wall of the first core pin between the two first bumps.

[0012] Further, a second insulating tube is sleeved on the outer wall of the second core pin between the two second bumps.

[0013] Further, the diameter of the first core pin hole becomes larger at the position close to the tail of the inner insulating base, and a heat shrinkable tube is sleeved on the first core pin at the position where the diameter of the first core pin hole becomes larger.

[0014] Further, the second core pin holes are arranged in two circular arrays.

[0015] Further, there are 28 second core pin holes, evenly distributed in each circle.

[0016] Further, the soldering cup directions of each of the first core pins and the second core pins are both arranged outward.

[0017] Compared with the prior art, the present utility model has at least the following beneficial effects:

[0018] A 32-core coaxial electrical connector plug for oil well logging provided by the present utility model has a stepped structure where the diameter of the first core pin hole on the inner insulating base becomes larger at one end close to the inner insulating cover bowl, and the diameter of the first core pin hole on the inner insulating cover bowl becomes larger at one end close to the inner insulating base, and these two stepped structures cooperate with two first bumps provided on the outer periphery of the first core pin to form a limit for the first core pin. When a certain first core pin is damaged and needs to be replaced, only need to separate the inner insulating cover bowl from the inner insulating base, extract the damaged first core pin, and reinstall the new first core pin to complete the replacement. The diameter of the second core pin hole on the outer insulating base becomes larger at one end close to the outer insulating cover bowl to form a step, and the diameter of the second core pin hole on the outer insulating cover bowl becomes larger at one end close to the outer insulating base to form a step, and these two stepped structures cooperate with two second bumps provided on the outer periphery of the second core pin hole to form a limit for the second core pin. When some second core pins are damaged and need to be replaced, only need to separate the outer insulating cover bowl from the outer insulating base, extract the damaged second core pins, and reinstall the new second core pins to achieve repair and replacement. That is to say, when a certain core pin is found to be damaged, the corresponding inner insulating cover bowl or outer insulating cover bowl can be separately removed, and the damaged core pin can be directly taken out and replaced, without the need to replace the connector plug as a whole, thereby greatly saving costs, improving the operation efficiency, effectively solving the problem that it is difficult to separately replace the core pin in the traditional forced press-fit structure, and improving the flexibility and economy of the well logging operation.

[0019] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, makes the following detailed description. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the specific embodiments of the present utility model, the following will briefly introduce the drawings required for use in the description of the specific embodiments. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of a 32-core coaxial electrical connector plug for oil well logging of the present utility model;

[0022] Figure 2 is Figure 1 the A-A cross-sectional view in

[0023] Figure 3 is Figure 1 the B-B cross-sectional view in

[0024] Figure 4 is Figure 3 the C-C cross-sectional view in

[0025] Figure 5 the right view of a 32-core coaxial electrical connector plug for oil logging of the present utility model;

[0026] Figure 6 is Figure 5 the D-D cross-sectional view in

[0027] Figure 7 the left view of a 32-core coaxial electrical connector plug for oil logging of the present utility model;

[0028] Figure 8 the left view and cross-sectional view of the outer insulating cover bowl in a 32-core coaxial electrical connector plug for oil logging of the present utility model;

[0029] Figure 9 the left view and cross-sectional view of the inner insulating cover bowl in a 32-core coaxial electrical connector plug for oil logging of the present utility model;

[0030] Figure 10 the schematic diagram and cross-sectional view of the shielding cylinder in a 32-core coaxial electrical connector plug for oil logging of the present utility model;

[0031] Figure 11 the schematic diagram of the second core pin in a 32-core coaxial electrical connector plug for oil logging of the present utility model;

[0032] Figure 12 the schematic diagram of the first core pin in a 32-core coaxial electrical connector plug for oil logging of the present utility model;

[0033] Figure 13 the schematic diagram of the cooperation between the outer insulating base and the outer insulating cover bowl in a 32-core coaxial electrical connector plug for oil logging of the present utility model;

[0034] Figure 14 the schematic diagram of the cooperation between the inner insulating base and the inner insulating cover bowl in a 32-core coaxial electrical connector plug for oil logging of the present utility model.

[0035] In the figure: 1 - shielding cylinder; 2 - inner insulating base; 3 - inner insulating cover bowl; 4 - first core pin hole; 5 - first core pin; 6 - first convex block; 7 - outer insulating base; 8 - outer insulating cover bowl; 9 - second core pin hole; 10 - second core pin; 11 - second convex block; 12 - limiting boss; 13 - groove; 14 - limiting pin; 15 - first insulating tube; 16 - second insulating tube; 17 - heat shrinkable tube. Detailed implementation manner

[0036] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0037] Combined with Figures 1 to 14 As shown in the figure, the embodiment of the present utility model provides a 32-core coaxial electrical connector plug for oil well logging, including a shielding cylinder 1. An inner insulating base 2 and an inner insulating cover bowl 3 which are detachably docked are sleeved inside the shielding cylinder 1. A plurality of first core pin holes 4 are correspondingly and throughly formed on the inner insulating base 2 and the inner insulating cover bowl 3. The diameter of the first core pin holes 4 becomes larger at the docking position of the inner insulating base 2 and the inner insulating cover bowl 3 to form two steps. A first core pin 5 is inserted into the first core pin holes 4. Two first convex blocks 6 are arranged on the outer periphery of the first core pin 5, and the two first convex blocks 6 respectively abut against the two steps in the first core pin holes 4. The inner diameter of the shielding cylinder 1 is slightly larger than the outer diameter of the inner insulating base 2 so that the inner insulating base 2 and the inner insulating cover bowl 3 can be smoothly sleeved in. Specifically, as Figure 14 shown, the diameter of the first core pin holes 4 on the inner insulating base 2 becomes larger at one end close to the inner insulating cover bowl 3 to form a step, and the diameter of the first core pin holes 4 on the inner insulating cover bowl 3 becomes larger at one end close to the inner insulating base 2 to form a step. These two step structures cooperate with the two first convex blocks 6 arranged on the outer periphery of the first core pin 5 to form a limit for the first core pin 5. If a certain first core pin 5 is damaged and needs to be replaced, only need to separate the inner insulating cover bowl 3 from the inner insulating base 2, pull out the damaged first core pin 5, and reinstall the new first core pin 5.

[0038] An outer insulation base 7 and an outer insulation cover bowl 8 which are detachably butted are sleeved outside the shielding cylinder 1. A plurality of second core pin holes 9 are correspondingly and penetratingly formed in the outer insulation base 7 and the outer insulation cover bowl 8, and the diameter of the second core pin holes 9 becomes larger at the butting position of the outer insulation base 7 and the outer insulation cover bowl 8 to form two steps. A second core pin 10 is inserted into the second core pin holes 9, and two second bumps 11 are arranged on the outer periphery of the second core pin 10. The two second bumps 11 respectively abut against the two steps in the second core pin holes 9. The shielding cylinder 1, the inner insulation base 2, the inner insulation cover bowl 3, the outer insulation base 7 and the outer insulation cover bowl 8 are all coaxially arranged. Similarly, as Figure 13 shown, the diameter of the second core pin hole 9 on the outer insulation base 7 becomes larger at one end close to the outer insulation cover bowl 8 to form a step, and the diameter of the second core pin hole 9 on the outer insulation cover bowl 8 becomes larger at one end close to the outer insulation base 7 to form a step. These two step structures cooperate with the two second bumps 11 arranged on the outer periphery of the second core pin hole 9 to form a limit for the second core pin 10. When some of the second core pins 10 are damaged and need to be replaced, only need to separate the outer insulation cover bowl 8 from the outer insulation base 7, pull out the damaged second core pin 10, and reinstall the new second core pin 10 to realize maintenance and replacement.

[0039] In summary, when a certain core pin is found to be damaged, the corresponding inner insulation cover bowl 3 or outer insulation cover bowl 8 can be separately removed, the damaged core pin can be directly taken out and replaced, and there is no need to replace the connector plug as a whole, thus greatly saving costs, improving the operation efficiency, effectively solving the problem that it is difficult to separately replace the core pin in the traditional forced press-fit structure, and improving the flexibility and economy of the logging operation.

[0040] Exemplarily, the inner insulation base 2, the inner insulation cover bowl 3, the outer insulation base 7 and the outer insulation cover bowl 8 are all made of high-performance insulating materials, such as ceramics, to ensure good electrical insulation performance.

[0041] In a realizable manner, the outer insulation base 7 and the outer insulation cover bowl 8 are detachably connected by bolts. Combining Figure 13 shown, a limit step is arranged on the inner wall of the outer insulation base 7, and a limit boss 12 is arranged on the outer periphery of the shielding cylinder 1. The limit boss 12 is located at the limit step, and the limit boss 12 is abutted against the limit step by the outer insulation cover bowl 8.

[0042] Specifically, when it is necessary to replace the core needle or perform other maintenance work, only the bolt connection of the outer insulation component needs to be disassembled, and the internal components can be conveniently processed. On the inner wall of the outer insulation base 7, a circle of limiting steps is designed. The function of the limiting steps is to provide a positioning reference to ensure that the shielding cylinder 1 can be correctly aligned when inserted into the outer insulation base 7 and prevent it from moving in the axial direction. On the outer circumference of the shielding cylinder 1, at the position corresponding to the limiting steps, a limiting boss 12 is designed. The diameter of the limiting boss 12 is slightly larger than the rest of the shielding cylinder 1, and its height matches the depth of the limiting steps. When the shielding cylinder 1 is inserted into the outer insulation base 7, the limiting boss 12 will naturally abut against the limiting steps to achieve axial positioning. When the outer insulation cover bowl 8 is connected to the outer insulation base 7 by bolts, it will press the limiting boss 12 of the shielding cylinder 1, making the limiting boss 12 abut against the limiting steps.

[0043] In an implementable manner, in combination with Figure 4 、 Figure 9 and Figure 10 as shown, a number of first pin holes are radially opened on the outer walls of the inner insulation base 2 and the inner insulation cover bowl 3. A second pin hole corresponding to the first pin hole is radially and throughly opened on the outer wall of the shielding cylinder 1. A groove 13 corresponding to the second pin hole is axially opened on the inner wall of the outer insulation cover bowl 8. A limiting pin 14 is inserted into the first pin hole and the second pin hole, and one end of the limiting pin 14 abuts against the groove 13.

[0044] That is to say, a number of first pin holes are radially opened on the outer walls of the inner insulation base 2 and the inner insulation cover bowl 3, that is, these first pin holes are perpendicular to the central axis of the inner insulation base and the cover bowl and are evenly distributed along the circumferential direction thereof. These first pin holes are used to connect with the external shielding cylinder 1 to achieve stable assembly and positioning. As Figure 10 shown, a second pin hole corresponding to the first pin hole is radially and throughly opened on the outer wall of the shielding cylinder 1. The second pin hole corresponds to the first pin holes on the inner insulation base and the inner insulation cover bowl to ensure accurate docking during assembly. The design of the second pin hole allows the limiting pin to pass through, thereby firmly connecting the inner insulation part (including the base and the cover bowl) to the shielding cylinder 1.

[0045] The inner wall of the outer insulating cover bowl 8 is axially provided with grooves 13 corresponding to the second pin holes. These grooves are located at positions opposite to the second pin holes and are used for one end of the limit pin to extend in. The design of the grooves 13 enables the end of the limit pin 14 to be firmly embedded in the grooves 13 after being inserted into the first pin hole and the second pin hole. The cooperation between the limit pin 14 and the grooves 13 realizes the circumferential positioning of the inner insulating base 2 and the inner insulating cover bowl 3, avoiding the circumferential rotation of the inner insulating base 2 and the inner insulating cover bowl 3. That is, the limit pin 14 is inserted into the first pin hole and the second pin hole, and one end of it abuts in the grooves 13. As a key component for connection and fixation, the limit pin ensures the limit connection between the inner insulating base, the inner insulating cover bowl, the shielding cylinder and the outer insulating cover bowl.

[0046] As a preferred embodiment, as Figure 6 shown, a first insulating tube 15 is sleeved on the outer wall of the first core pin 5 between the two first bumps 6. The main function of the first insulating tube 15 is to provide electrical insulation and avoid the occurrence of creepage at the docking position of the inner insulating base 2 and the inner insulating cover bowl 3.

[0047] It should be understood that the first insulating tube 15 should have a certain elasticity and toughness so that it can be easily sleeved into the core pin hole and closely fit the outer wall of the core pin. During the installation process, it is necessary to ensure that the insulating tube is not damaged or deformed.

[0048] As a preferred embodiment, as Figure 3 shown, a second insulating tube 16 is sleeved on the outer wall of the second core pin 10 between the two second bumps 11. Similarly, like the first insulating tube 15, the main function of the second insulating tube 16 is to provide electrical insulation and avoid the occurrence of creepage at the docking position of the outer insulating base 7 and the outer insulating cover bowl 8.

[0049] In a realizable manner, the diameter of the first core pin hole 4 becomes larger at a position near the tail of the inner insulating base 2, and a heat shrinkable tube 17 is sleeved on the first core pin 5 at the corresponding position where the diameter of the first core pin hole 4 becomes larger. By changing the aperture size, it is easier to realize the cooperative installation with the heat shrinkable tube 17, and the heat shrinkable tube 17 can prevent creepage, thus ensuring the reliability and insulation of the connection.

[0050] Preferably, the second core pin holes 9 are arranged in two circular arrays. By arranging the second core pin holes 9 in two circular arrays, the limited space inside the connector can be utilized more effectively. This layout enables more core pins to be arranged compactly together, thus supporting more signal channels and meeting the requirements of complex data transmission in oil logging. The layout of the circular array helps to reduce electromagnetic interference and signal crosstalk between the core pins. The design of the circular array enables the standardized production of the connector during the manufacturing process. At the same time, during the maintenance process, due to the clear and orderly layout of the core pins, it is also easier to carry out fault troubleshooting and replacement.

[0051] Preferably, there are 28 second pin holes 9, with 14 evenly distributed in each circle. The 14 second pin holes 9 in each circular array are evenly distributed, ensuring the full utilization of the internal space of the connector and the balance of signal transmission.

[0052] Preferably, the soldering cup directions of each first pin and the second pins 10 are all set outwards. The soldering cup direction being outwards makes the soldering process more intuitive and convenient. During the manufacturing process, technicians can more easily solder wires to the soldering cups without complex operations or additional tools, reducing the soldering difficulty and error rate, and improving production efficiency and product quality. The soldering cup direction being outwards also helps to improve the reliability of soldering. Since the soldering cups are directly exposed to the outside, it is easier to control the soldering quality and depth during the soldering process, ensuring a good electrical connection between the wires and the soldering cups. During the use of the connector, if wire repair or replacement is required, the design with the soldering cup direction outwards also provides convenience. Technicians can more easily access the soldering cups and perform necessary operations without disassembling the entire connector or damaging its internal structure.

[0053] More preferably, the first pin holes 4 in the inner insulating cover bowl 3 are waist-shaped holes, and the second pin holes 9 in the outer insulating cover bowl 8 are waist-shaped holes. The pins are milled with flattened planes to cooperate with the corresponding waist-shaped holes, so as to make the soldering cup directions of the socket pins evenly distributed along the circumference and all outwards, facilitating the soldering use by the user unit.

[0054] The overall volume of the product in this embodiment is small (with a diameter of only 23 mm), and it adopts a modular design, which is convenient for later replacement and repair, and will not cause the entire socket to be scrapped due to problems with individual parts.

[0055] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0056] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0057] In the present utility model, unless otherwise clearly defined or limited, terms such as "connected" and "coupled" shall be construed broadly. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or capable of communicating with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication between two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0058] In the present utility model, unless otherwise clearly defined or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0059] In the present utility model, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0060] Finally, it should be noted that the above-described embodiments are only specific embodiments of the present utility model, used to illustrate the technical solutions of the present utility model, rather than limiting it. The protection scope of the present utility model is not limited thereto. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: any person skilled in the art within the technical scope disclosed by the present utility model can still modify the technical solutions described in the foregoing embodiments or can easily think of changes, or make equivalent replacements for some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model, and should all be covered by the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A 32-core coaxial electrical connector plug for oil well logging, characterized in that: The invention comprises a shielding tube (1), wherein an inner insulating base (2) and an inner insulating cover bowl (3) which are disassembled and connected to each other are sleeved inside the shielding tube (1), a plurality of first core needle holes (4) are correspondingly opened through the inner insulating base (2) and the inner insulating cover bowl (3), and the diameter of the first core needle hole (4) becomes larger at the connection position between the inner insulating base (2) and the inner insulating cover bowl (3) to form two steps, a first core needle (5) is inserted into the first core needle hole (4), and two first protrusions (6) are arranged on the outer periphery of the first core needle (5), and the two first protrusions (6) respectively abut against the two steps in the first core needle hole (4); The outer shell of the shielding tube (1) is provided with an outer insulating base (7) and an outer insulating cover bowl (8) which are disassembled and connected to each other. The outer insulating base (7) and the outer insulating cover bowl (8) are provided with a plurality of second core needle holes (9) correspondingly through-opened, and the diameter of the second core needle hole (9) becomes larger at the connection position between the outer insulating base (7) and the outer insulating cover bowl (8) to form two steps. A second core needle (10) is inserted into the second core needle hole (9), and two second protrusions (11) are provided on the outer periphery of the second core needle (10), and the two second protrusions (11) respectively abut against the two steps in the second core needle hole (9); The shielding cylinder (1), the inner insulating base (2), the inner insulating cover bowl (3), the outer insulating base (7) and the outer insulating cover bowl (8) are all coaxially arranged.

2. A 32-core coaxial electrical connector plug for oil well logging according to claim 1, characterized in that: The outer insulating base (7) and the outer insulating cover bowl (8) are detachably connected by bolts, the inner wall of the outer insulating base (7) is provided with a limiting step, the outer periphery of the shielding tube (1) is provided with a limiting boss (12), the limiting boss (12) is located at the limiting step, and the limiting boss (12) is pressed against the limiting step by the outer insulating cover bowl (8).

3. A 32-core coaxial electrical connector plug for oil well logging according to claim 2, characterized in that: The outer walls of the inner insulating base (2) and the inner insulating cover bowl (3) are radially provided with a plurality of first pin holes, the outer wall of the shielding cylinder (1) is radially provided with second pin holes corresponding to the first pin holes, the inner wall of the outer insulating cover bowl (8) is axially provided with grooves (13) corresponding to the second pin holes, and the first pin holes and the second pin holes are inserted with limit pins (14), and one end of the limit pin (14) is against the groove (13).

4. A 32-core coaxial electrical connector plug for oil well logging according to claim 1, characterized in that: A first insulating tube (15) is sleeved on the outer wall of the first core needle (5) located between the two first protrusions (6).

5. The 32-core coaxial electrical connector plug for oil well logging according to claim 1, characterized in that: A second insulating tube (16) is sleeved on the outer wall of the second core needle (10) located between the two second protrusions (11).

6. A 32-core coaxial electrical connector plug for oil well logging according to claim 1, characterized in that: The diameter of the first core needle hole (4) increases at a position close to the tail of the inner insulating base (2), and a heat shrink tube (17) is sleeved on the first core needle (5) at the position corresponding to the increased diameter of the first core needle hole (4).

7. A 32-core coaxial electrical connector plug for oil well logging according to claim 1, characterized in that: The second core pinholes (9) are arranged in two circles of annular arrays.

8. A 32-core coaxial electrical connector plug for oil well logging according to claim 7, characterized in that: The second core needle holes (9) have 28 in total, with 14 holes evenly distributed in each circle.

9. A 32-core coaxial electrical connector plug for oil well logging according to claim 1, characterized in that: The welding cup of each of the first core needle and the second core needle (10) is arranged to face outwards.

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