Low-temperature high-voltage-resistant high-airtightness electric connector

Abstract

The invention discloses a low-temperature high-voltage-resistant high-airtightness electric connector, which comprises a first shell, a second shell, a connecting flange, an insulating block, a first electrode, a second electrode, a first cable, a second cable and a cable sealing body, and is characterized in that the connecting flange is hermetically connected between the first shell and the second shell; the insulating block is in threaded bonding with the inner wall of the connecting flange through low-temperature resin, the first electrode and the second electrode are fixedly connected and then penetrate through the insulating block, the end, away from the second electrode, of the first electrode is connected with a first cable, and the end, away from the first electrode, of the second electrode is connected with a second cable; and cable sealing bodies are arranged at the joint of the first electrode and the first cable and the joint of the second electrode and the second cable. The electric connector has the advantages that leakage is avoided, safe and reliable connection of internal and external high-voltage signals at low temperature is ensured, and the stability and reliability of signal and energy transmission of the electric connector under the working conditions of extremely low temperature, high voltage and high air tightness are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric connectors, and in particular to a low-temperature, high-voltage, and high-airtightness electric connector. Background Art

[0002] An electrical connector is a device that provides connection and separation functions between electrical terminals, carries signals and transmits energy. It is an indispensable electrical connector in the electrical hub. In cutting-edge technology systems such as aviation, aerospace and nuclear energy, electrical connectors are required to adapt to various complex and harsh working environment conditions, such as high and low temperature resistance, high and low air pressure resistance, high impact and vibration resistance, and low outgassing.

[0003] At present, domestic electrical connector products for room temperature range are relatively mature. Ordinary electrical connectors developed for room temperature conditions will have many fault problems in low temperature environments, such as signal interruption and leakage. The reason is that in harsh working environments such as low temperature, low pressure, and high voltage, the air tightness of electrical connectors at low temperatures and the Paschen discharge performance at low pressure are greatly reduced. The design and manufacturing process of existing electrical connectors still adopts traditional design ideas, and their sealing performance is still unstable and needs to be improved urgently. Summary of the invention

[0004] The technical problem to be solved by the present invention is how to improve the stability and reliability of signal and energy transmission of the electrical connector under extremely low temperature, high voltage and high airtightness conditions.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A low-temperature, high-voltage, and high-airtightness electrical connector comprises a first shell, a second shell, a connecting flange, an insulating block, a first electrode, a second electrode, a first cable, a second cable, and a cable sealing body. The connecting flange is sealedly connected between the first shell and the second shell. The insulating block is bonded to the inner wall thread of the connecting flange by a low-temperature resin. The first electrode is fixed to the second electrode and passes through the insulating block. The first electrode extending into the insulating block is bonded to the insulating block thread by a low-temperature resin. The second electrode extending into the insulating block is bonded to the insulating block thread by a low-temperature resin. The end of the first electrode away from the second electrode is connected to the first cable extending into the first shell. The end of the second electrode away from the first electrode is connected to the second cable extending into the second shell. A cable sealing body is provided at the connection between the first electrode and the first cable and at the connection between the second electrode and the second cable.

[0007] The electrical connector avoids leakage through structural optimization design and sealing design, ensuring safe and reliable connection of internal and external high-voltage signals at low temperatures, improving the stability and reliability of signal and energy transmission of the electrical connector under extremely low temperature, high voltage and high airtightness conditions.

[0008] Preferably, the connecting flange is fixed to the first shell and the second shell by welding.

[0009] Preferably, the insulating block is made of G10 material.

[0010] Preferably, the insulating block is provided with a plurality of threaded holes, so that the first electrode and the second electrode can be threadedly bonded to the threaded holes.

[0011] Preferably, the threaded hole is a stepped threaded hole, the small-diameter end is threadedly bonded to the first electrode, and the large-diameter end is threadedly bonded to the second electrode.

[0012] Preferably, the threaded holes are evenly distributed along the circumference of the center of the insulating block.

[0013] Preferably, the first electrode and the second electrode are fixed by welding.

[0014] Preferably, the cable sealing body is integrally cast with low-temperature epoxy resin.

[0015] Preferably, the second electrode is a copper connecting sleeve.

[0016] Preferably, the first shell and the second shell are both stainless steel cylinders.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The electrical connector avoids leakage through structural optimization design and sealing design, ensuring safe and reliable connection of internal and external high-voltage signals at low temperatures, improving the stability and reliability of signal and energy transmission of the electrical connector under extremely low temperature, high voltage and high airtightness conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of embodiment 1 of the present invention. DETAILED DESCRIPTION

[0020] In order to facilitate those skilled in the art to understand the technical solution of the present invention, the technical solution of the present invention is further described in conjunction with the accompanying drawings of the specification.

[0021] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0022] In this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise clearly and specifically limited.

[0023] See also Figure 1 This embodiment discloses a low-temperature, high-voltage, and high-airtightness electrical connector, including a first shell 1, a second shell 2, a connecting flange 3, an insulating block 4, a first electrode 5, a second electrode 6, a first cable 7, a second cable 8, and a cable sealing body 9.

[0024] In this embodiment, the first shell 1 and the second shell 2 are both stainless steel cylinders, and the connecting flange 3 is sealed and welded between the first shell 1 and the second shell 2 .

[0025] The insulating block 4 is made of G10 material, and is threadedly bonded to the inner wall of the connecting flange by low-temperature resin. The first electrode 5 and the second electrode 6 are welded and fixed and penetrate the insulating block 4, and the first electrode 5 extending into the insulating block 4 is threadedly bonded to the insulating block 4 by low-temperature resin, and the second electrode 6 extending into the insulating block 4 is threadedly bonded to the insulating block 4 by low-temperature resin. The end of the first electrode 5 away from the second electrode 6 is connected to the first cable 7 extending into the first shell 1, and the end of the second electrode 6 away from the first electrode 5 is connected to the second cable 8 extending into the second shell 2.

[0026] Specifically, the insulating block 4 has a plurality of threaded holes evenly distributed in a circumferential manner along the center of the insulating block 4 , so that the first electrode 5 and the second electrode 6 can be threadedly bonded to the threaded holes.

[0027] Furthermore, the threaded hole is a stepped threaded hole, the small-diameter end is threadedly bonded to the first electrode 5 , and the large-diameter end is threadedly bonded to the second electrode 6 .

[0028] By setting the insulating block 4, the interference of irrelevant electromagnetic signals can be shielded, and the need to design multiple sealing rubber rings for multiple wiring harnesses can be avoided, thereby saving space, improving assembly efficiency, and playing the function of sealing the wiring harness and the housing.

[0029] In this embodiment, the second electrode 6 is a copper connecting sleeve.

[0030] A cable sealing body 9 is provided at the connection between the first electrode 5 and the first cable 7 and at the connection between the second electrode 6 and the second cable 8. The cable sealing body 9 is an integrally cast low-temperature epoxy resin, which further improves the sealing performance of the electrical connector.

[0031] Specifically, the electrical connector has been tested and has the following performances:

[0032] 1. Withstand voltage: At room temperature, the medium gas is air, and the withstand voltage is greater than 30kV;

[0033] 2. Vacuum leakage rate: At room temperature, the leakage rate is <10-9Pa m3 / s;

[0034] 3. Paschen-DC: 21kV, in helium atmosphere (1, 10, 100, 1000, 10000Pa), 10kV / / min.

[0035] The installation process of this embodiment is: first, the first electrode 5 and the second electrode 6 are welded and fixed to form an electrode structure, and then the electrode structure is passed through the stepped threaded hole on the insulating block 4, the first electrode 5 is bonded to the small-diameter end thread, and the second electrode 6 is bonded to the large-diameter end thread, and then the connecting flange 3 is bonded to the outer wall of the insulating block 4 through a low-temperature resin thread, and then, the first cable 7 and the second cable 8 are correspondingly inserted into the first shell 1 and the second shell 2, and then the first electrode 5 and the first cable 7 are welded and fixed, and the second electrode 6 and the second cable 8 are welded, and then the first shell 1 and the second shell 2 and the connecting flange 3 are welded and fixed, and finally, low-temperature epoxy resin is poured into the connection between the first electrode 5 and the first cable 7 in the first shell 1, and after the low-temperature epoxy resin is cured to form a cable sealing body 9, low-temperature epoxy resin is poured into the connection between the second electrode 6 and the second cable 8 in the second shell 2, and the low-temperature epoxy resin is cured to form a cable sealing body 9, and the installation of the electrical connector is completed.

[0036] In summary, the electrical connector avoids leakage through structural optimization design and sealing design, ensuring safe and reliable connection of internal and external high-voltage signals at low temperatures, and improving the stability and reliability of signal and energy transmission of the electrical connector under extremely low temperature, high voltage and high airtightness conditions.

[0037] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any reference numerals in the claims should not be regarded as limiting the claims involved.

[0038] The above-described embodiments merely represent implementation methods of the invention. The protection scope of the present invention is not limited to the above-described embodiments. For those skilled in the art, several modifications and improvements may be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A low temperature, high voltage and high airtightness electrical connector, characterized in that: It includes a first shell, a second shell, a connecting flange, an insulating block, a first electrode, a second electrode, a first cable, a second cable and a cable sealing body. The connecting flange is sealedly connected between the first shell and the second shell. The insulating block is bonded to the inner wall thread of the connecting flange by low-temperature resin. The first electrode and the second electrode are fixedly connected and penetrate the insulating block. The first electrode extending into the insulating block is bonded to the insulating block thread by low-temperature resin. The second electrode extending into the insulating block is bonded to the insulating block thread by low-temperature resin. The end of the first electrode away from the second electrode is connected to the first cable extending into the first shell. The end of the second electrode away from the first electrode is connected to the second cable extending into the second shell. A cable sealing body is provided at the connection between the first electrode and the first cable and at the connection between the second electrode and the second cable.

2. The low-temperature, high-voltage and high-airtightness electrical connector according to claim 1, characterized in that: The connecting flange is welded and fixed to the first shell and the second shell.

3. The low-temperature, high-voltage and high-airtightness electrical connector according to claim 1, characterized in that: The insulating block is made of G10 material.

4. The low-temperature, high-voltage, and high-airtightness electrical connector according to claim 1, characterized in that: The insulating block is provided with a plurality of threaded holes, so that the first electrode and the second electrode can be threadedly bonded with the threaded holes.

5. The low-temperature, high-voltage and high-airtightness electrical connector according to claim 4, characterized in that: The threaded hole is a stepped threaded hole, the small-diameter end is threadedly bonded to the first electrode, and the large-diameter end is threadedly bonded to the second electrode.

6. The low-temperature, high-voltage, and high-airtightness electrical connector according to claim 4, characterized in that: The threaded holes are evenly distributed in a circle along the center of the insulating block.

7. The low-temperature, high-voltage, and high-airtightness electrical connector according to claim 1, characterized in that: The first electrode and the second electrode are fixed by welding.

8. The low-temperature, high-voltage, and high-airtightness electrical connector according to claim 1, characterized in that: The cable sealing body is integrally cast with low-temperature epoxy resin.

9. The low-temperature, high-voltage and high-airtightness electrical connector according to claim 1, characterized in that: The second electrode is a copper connecting sleeve.

10. The low temperature, high voltage and high airtightness electrical connector according to claim 1, characterized in that: The first shell and the second shell are both stainless steel cylinders.

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