Multi-core high-temperature pressure-bearing connector and preparation method thereof

Abstract

The invention relates to a connector, in particular to a multi-core high-temperature pressure-bearing connector and a preparation method thereof. The multi-core high-temperature pressure-bearing connector comprises a shell and a plurality of contact pins, wherein a plurality of stepped through holes with the same number as the contact pins are formed in the end face of one side of the shell; the contact pin comprises a head part, a stepped insertion part and a tail part; the large end of the stepped insertion part is connected with the tail part, and the small end is connected with the head part; the head part extends into the shell from the large section of the stepped through hole and extends out of the shell from the small section of the stepped through hole; a gap of 0.05-0.1 mm is reserved between the stepped insertion part and the stepped through hole; the gap is filled with an epoxy resin adhesive; a plurality of conical barbs are arranged at the small end of the stepped insertion part, and the small end of the stepped insertion part is in interference fit with the inner wall of the small section of the stepped through hole through the conical barbs. According to the invention, the shell is made into a whole, so that the loading capacity of the product is greatly enhanced; the number of the contact pins is larger, and larger current can pass through the contact pins.

Description

Technical Field

[0001] The invention relates to a connector, and in particular to a multi-core high-temperature pressure-bearing connector and a preparation method thereof. Background Art

[0002] A multi-core high-temperature pressure-bearing connector is a connector with multiple conductive channels. It can maintain stable electrical connection and sealing performance under high temperature and high pressure conditions. It is often used in the field of oil exploration for electrical connection and data transmission between logging instruments and downhole equipment.

[0003] Currently, if Figure 1 As shown in the figure, the shell 01 of the common multi-core high temperature pressure-bearing connector is usually a split structure. During assembly, the pin 03 is inserted into the mounting hole of the shell 01, and then the pin 03 is fixed to the shell 01 using the screw 04 and the pressure plate 02. However, due to the split structure of the shell, the thickness of the pressure-bearing part is insufficient and it is difficult to withstand a large pressure. In addition, the pin and the shell are fitted with a gap, which is prone to leakage under high pressure conditions, causing damage to the equipment. Summary of the invention

[0004] The purpose of the present invention is to solve the technical problem that the existing multi-core connector is difficult to withstand greater pressure during use due to the split structure of the shell, and to provide a multi-core high-temperature pressure-bearing connector and a preparation method thereof.

[0005] To solve the above technical problems, the technical solutions provided by the present invention are as follows:

[0006] A multi-core high-temperature pressure-bearing connector, comprising a housing and a plurality of pins, wherein a plurality of stepped through holes having the same number as the pins are provided on one end surface of the housing;

[0007] The pin includes a head, a stepped insertion portion and a tail; the large end of the stepped insertion portion is connected to the tail, and the small end is connected to the head;

[0008] The head extends from the large section of the stepped through hole into the shell, and extends from the small section of the stepped through hole to the outside of the shell; a gap of 0.05-0.1 mm is left between the stepped insertion portion and the stepped through hole; the gap is filled with epoxy resin adhesive;

[0009] A plurality of conical barbs are arranged on the small end of the stepped insertion portion, and the small end of the stepped insertion portion is interference-fitted with the inner wall of the small section of the stepped through hole through the conical barbs.

[0010] Furthermore, an annular glue storage groove is provided on the small end of the stepped insertion portion.

[0011] Furthermore, a plurality of tapered barbs are evenly distributed on the small end of the stepped insertion portion, and the taper of the tapered barbs is 0.15:2.

[0012] Furthermore, the tail portion is provided with a welding cup.

[0013] Furthermore, an annular groove is provided on the outer side of the shell, and a sealing ring is provided in the annular groove.

[0014] Furthermore, the material of the shell is composed of 70% polyetheretherketone and 30% glass fiber;

[0015] The material of the pin is beryllium copper.

[0016] A method for preparing a multi-core high-temperature pressure-bearing connector comprises the following steps:

[0017] S1. Apply a layer of epoxy resin adhesive with a thickness of 0.05-0.1 mm on the stepped insertion portion of the pin and the outer surface of the conical barb;

[0018] S2. Fix the tail of the pin in the tooling, and extend the head of the pin from the stepped through hole to the outside of the housing through the tooling, so that the large end of the stepped insertion portion is completely inserted into the large section of the stepped through hole, and the installation of the pin is completed;

[0019] S3, repeating the above steps S1 to S2 to complete the pre-assembly of the multi-core high temperature pressure-bearing connector;

[0020] S4. After pre-installation, place the multi-core high temperature pressure-bearing connector at room temperature for preliminary curing for 16-18 hours;

[0021] S5. After the initial curing is completed, place the multi-core high temperature pressure-bearing connector in an oven, adjust the oven temperature to 60°C, and cure the multi-core high temperature pressure-bearing connector for 2 hours to complete the preparation of the multi-core high temperature pressure-bearing connector.

[0022] Further, the tooling includes a mounting portion and a hand-held portion connected to each other;

[0023] An installation hole matched with the tail of the pin is provided at one end of the installation part away from the hand-held part, and the end of the installation part away from the hand-held part can abut against the large end of the stepped insertion part.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The preparation method of the multi-core high-temperature pressure-bearing connector provided by the present invention is to open a stepped through hole on the shell, set a stepped insertion part at the position where the pin is matched with the shell, and set a conical barb on the small section of the stepped insertion part of the pin, so that the pin can be fixed in the stepped through hole by the large end of the stepped insertion part matching with the large section of the stepped through hole, and the interference fit between the conical barb and the inner wall of the stepped through hole; compared with the method of fixing the pin by screws, pressure plates and shells in the prior art, the present invention can fix the pin and the shell without using screws and pressure plates, and can increase the number of pins in the multi-core high-temperature pressure-bearing connector, so that the connector can pass a larger working current; by filling the gap between the stepped through hole and the stepped insertion part of the shell with epoxy resin adhesive, the gap between the stepped through hole and the stepped insertion part can be sealed, so as to prevent leakage and fix the pin at the same time.

[0026] 2. The preparation method of the multi-core high-temperature pressure-bearing connector provided by the present invention, the shell of the present invention can withstand a pressure of 60MPa (from left to right); and because the material of the shell is composed of 70% polyetheretherketone and 30% glass fiber, the maximum operating temperature of the shell is 230°C, the material of the pin is beryllium bronze, the maximum operating temperature of beryllium bronze is 300°C, and the maximum operating temperature of the epoxy resin adhesive is 150°C, so that the connector can be used at an ambient temperature of 150°C; because polyetheretherketone has excellent insulation properties, the connector can be used under high temperature and high pressure conditions while the insulation performance between the pins can also meet the requirements, and at the same time, it can ensure that the insulation resistance between all the pins and the shell is not less than 500MΩ under high temperature and high oil pressure conditions.

[0027] 3. The preparation method of the multi-core high-temperature pressure-bearing connector provided by the present invention makes the shell into a whole, so that the pressure-bearing capacity of the product is greatly enhanced; the number of pins is larger, and a larger current can pass; in the context of the current miniaturization of instruments, the application prospects are broad. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a multi-core high temperature pressure-bearing connector in the prior art;

[0029] Figure 1 Explanation of the reference numerals: 01 is a housing, 02 is a pressure plate, 03 is a pin, and 04 is a screw.

[0030] Figure 2 It is a structural schematic diagram of an embodiment of the present invention;

[0031] Figure 3 It is a structural schematic diagram of a housing in an embodiment of the present invention;

[0032] Figure 4This is a schematic diagram of the structure of the pin in the embodiment of the present invention;

[0033] Figure 5 It is a structural schematic diagram of a tooling in an embodiment of the present invention;

[0034] Figures 2 to 5 Explanation of the reference numerals: 1 is a shell, 2 is a pin, 21 is a head, 22 is a stepped insertion portion, 23 is a tail, 231 is a solder cup, 3 is a stepped through hole, 4 is a conical barb, 5 is an annular glue storage groove, 6 is an annular groove, 7 is a tooling, 71 is a mounting portion, 72 is a hand-held portion, and 73 is a mounting hole. DETAILED DESCRIPTION

[0035] The technical solutions in the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] like Figure 2 As shown, a multi-core high-temperature pressure-bearing connector is used in an environment with a temperature not higher than 100°C and a pressure not higher than 60MPa; it includes a shell 1 and a plurality of pins 2, the shell 1 is made of 70% polyetheretherketone and 30% glass fiber; the pin 2 is made of beryllium bronze; Figure 3 As shown, a plurality of stepped through holes 3 having the same number as the pins 2 are provided on one end surface of the housing 1;

[0037] like Figure 4 As shown, the pin 2 includes a head 21, a stepped insertion portion 22 and a tail 23; the large end of the stepped insertion portion 22 is connected to the tail 23, and the small end is connected to the head 21;

[0038] like Figure 2 As shown, the head 21 extends into the shell 1 from the large section of the stepped through hole 3, and extends to the outside of the shell 1 from the small section of the stepped through hole 3; a gap of 0.05-0.1mm is left between the stepped insertion portion 22 and the stepped through hole 3; the gap is filled with epoxy resin adhesive; the epoxy resin adhesive is EAE-120HP high temperature resistant adhesive, which can withstand a high temperature of 150°C;

[0039] like Figure 2 and Figure 4 As shown, a plurality of evenly distributed conical barbs 4 are provided on the small end of the stepped insertion portion 22, and the taper of the conical barbs 4 is 0.15:2; the small end of the stepped insertion portion 22 is interference fit with the inner wall of the small section of the stepped through hole 3 through the conical barbs 4.

[0040] like Figure 4As shown, an annular adhesive storage groove 5 is provided on the small end of the stepped insertion portion 22, which is used to provide expansion space when the epoxy resin adhesive filled in the gap expands due to solidification, so that the epoxy resin adhesive will not damage the shell due to volume expansion.

[0041] like Figure 2 and Figure 4 As shown, the tail portion 23 is provided with a solder cup 231, and the solder cup 231 is used for soldering connection with a circuit board or other components.

[0042] like Figure 2 and Figure 4 As shown, in order to meet the sealing performance between the multi-core high-temperature pressure-bearing connector and the equipment, an annular groove 6 is opened on the outer side of the shell 1, and a sealing ring is arranged in the annular groove 6.

[0043] The present invention also provides a method for preparing a multi-core high-temperature pressure-bearing connector, comprising the following steps:

[0044] S1. Use a brush to apply a layer of epoxy resin adhesive with a thickness of 0.05-0.1 mm on the stepped insertion portion 22 of the pin 2 and the outer surface of the conical barb 4;

[0045] S2, fix the tail 23 of the pin 2 in the tooling 7, extend the head 21 of the pin 2 from the stepped through hole 3 to the outside of the housing 1 through the tooling 7, and make the large end of the stepped insertion portion 22 completely inserted into the large section of the stepped through hole 3, thus completing the installation of the pin 2;

[0046] S3, repeating the above steps S1 to S2 to complete the pre-assembly of the multi-core high temperature pressure-bearing connector;

[0047] S4. After pre-installation, place the multi-core high temperature pressure-bearing connector at room temperature for preliminary curing for 16-18 hours;

[0048] S5. After the initial curing is completed, place the multi-core high temperature pressure-bearing connector in an oven, adjust the oven temperature to 60°C, and cure the multi-core high temperature pressure-bearing connector for 2 hours to complete the preparation of the multi-core high temperature pressure-bearing connector.

[0049] like Figure 5 As shown, the tool 7 includes a connected mounting portion 71 and a hand-holding portion 72; a mounting hole 73 adapted to the tail portion 23 of the pin 2 is provided at one end of the mounting portion 71 away from the hand-holding portion 72, and the end of the mounting portion 71 away from the hand-holding portion 72 can abut against the large end of the stepped insertion portion 22.

[0050] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A multi-core high temperature pressure-bearing connector, characterized in that: It comprises a housing (1) and a plurality of plug pins (2), wherein a plurality of stepped through holes (3) equal in number to the number of the plug pins (2) are provided on one end surface of the housing (1); The insertion pin (2) comprises a head portion (21), a stepped insertion portion (22) and a tail portion (23); the large end of the stepped insertion portion (22) is connected to the tail portion (23), and the small end is connected to the head portion (21); The head (21) extends from the large section of the stepped through hole (3) into the interior of the housing (1), and extends from the small section of the stepped through hole (3) to the exterior of the housing (1); a gap of 0.05-0.1 mm is left between the stepped insertion portion (22) and the stepped through hole (3); and the gap is filled with epoxy resin adhesive; A plurality of conical barbs (4) are provided on the small end of the stepped insertion portion (22), and the small end of the stepped insertion portion (22) is interference-fitted with the inner wall of the small section of the stepped through hole (3) through the conical barbs (4).

2. The multi-core high temperature pressure-bearing connector according to claim 1, characterized in that: An annular glue storage groove (5) is provided on the small end of the stepped insertion portion (22).

3. The multi-core high temperature pressure-bearing connector according to claim 1, characterized in that: A plurality of tapered barbs (4) are evenly distributed on the small end of the stepped insertion portion (22), and the tapering of the tapered barbs (4) is 0.15:

2.

4. The multi-core high temperature pressure-bearing connector according to claim 1, characterized in that: The tail portion (23) is provided with a welding cup (231).

5. The multi-core high temperature pressure-bearing connector according to claim 1, characterized in that: An annular groove (6) is provided on the outer side of the housing (1), and a sealing ring is provided in the annular groove (6).

6. The multi-core high temperature pressure-bearing connector according to claim 1, characterized in that: The material of the shell (1) consists of 70% polyetheretherketone and 30% glass fiber; The material of the plug pin (2) is beryllium copper.

7. A method for preparing a multi-core high-temperature pressure-bearing connector, characterized in that: The steps include: S1. Apply a layer of epoxy resin adhesive with a thickness of 0.05-0.1 mm on the outer surface of the stepped insertion portion (22) and the conical barb (4) of the pin (2); S2, fix the tail (23) of the plug pin (2) in the tooling (7), extend the head (21) of the plug pin (2) from the stepped through hole (3) to the outside of the housing (1) through the tooling (7), and make the large end of the stepped insertion portion (22) completely inserted into the large section of the stepped through hole (3), thereby completing the installation of the plug pin (2); S3, repeating the above steps S1 to S2 to complete the pre-assembly of the multi-core high temperature pressure-bearing connector; S4. After pre-installation, place the multi-core high temperature pressure-bearing connector at room temperature for preliminary curing for 16-18 hours; S5. After the initial curing is completed, place the multi-core high temperature pressure-bearing connector in an oven, adjust the oven temperature to 60°C, and cure the multi-core high temperature pressure-bearing connector for 2 hours to complete the preparation of the multi-core high temperature pressure-bearing connector.

8. The method for preparing a multi-core high temperature pressure-bearing connector according to claim 7, characterized in that: The tool (7) comprises a mounting portion (71) and a hand-held portion (72) connected to each other; The end of the mounting portion (71) away from the hand-held portion (72) is provided with a mounting hole (73) adapted to the tail portion (23) of the plug pin (2), and the end of the mounting portion (71) away from the hand-held portion (72) can abut against the large end of the stepped insertion portion (22).

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