High-temperature-resistant plug

Abstract

The utility model discloses a high-temperature-resistant plug, which comprises an electric connector, a sealing layer, a tail cover and a sealing cover, the electric connector is connected with the sealing layer, one end of the tail cover is connected with the electric connector, the other end of the tail cover is connected with the sealing cover, a cavity A is arranged in the tail cover, and the sealing layer is arranged in the cavity A. The aerogel used in the utility model plays a decisive role in heat insulation, and when the ambient temperature is high, the temperature of the back temperature surface is reduced to about 1 / 3 of the ambient temperature by the heat insulation heat of the aerogel. Aerogel is made into a specific shape to be attached to the inner wall of the tail cover, then the tail cover attached with the aerogel is screwed to the tail end of the connector, then flame-retardant heat-insulation silicon rubber is poured into the tail cover glue pouring opening, and after the silicon rubber is completely cured, the tail cover glue pouring opening is sealed through a sealing cover. The high-temperature-resistant plug disclosed by the utility model is compact in structure and strong in heat insulation and heat resistance, so that the plug can work for a long time in a high-temperature environment.

Description

Technical Field

[0001] The utility model belongs to the technical field of ignition path plugs, in particular to a high-temperature resistant plug. Background Art

[0002] Currently, ignition path plugs are widely used in aviation, aerospace, and other technical fields, and high-temperature ignition path plugs are also widely used. Existing ignition path plugs can only ensure normal operation under normal temperature conditions, but are prone to damage when used in temperatures above 125°C, and their high-temperature operating temperature is too low. Therefore, there is a need for an ignition path plug with a higher operating temperature limit and a simple and compact structure.

[0003] Patent document CN112768982A discloses a heat-resistant and pressure-resistant electrical connector for a liquid resistivity sensor. The connector includes a housing, a first pin, a second pin, a third pin, a fourth pin, and an insulator. The connector does not disclose a detachable, high-temperature-resistant structure.

[0004] Patent document CN208423246U discloses an electrical connector comprising a socket and a plug, wherein the socket comprises a round base and a protective cover. The electrical connector lacks a corresponding high-temperature resistant structure and is easily damaged when used under high-temperature conditions. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a high temperature resistant plug.

[0006] The utility model is achieved through the following technical solutions.

[0007] The utility model provides a high-temperature resistant plug, which includes an electrical connector, a sealing layer, a tail cover and a sealing cover. The electrical connector is connected to the sealing layer, one end of the tail cover is connected to the electrical connector, and the other end of the tail cover is connected to the sealing cover. A cavity A is provided in the tail cover, and the sealing layer is provided in the cavity A.

[0008] Preferably, one end of the tail cover is a small end, and the other end of the tail cover is a large end. An internal thread is provided on one side of the small end, a groove A is provided on one side of the large end, an external thread A is provided on the groove A, and a positioning member A is provided in the tail cover. The positioning member A is provided on the side of the electrical connector, and the positioning member A is placed at the small end.

[0009] Preferably, a coating layer is provided in the cavity A, the sealing layer is connected to the tail cover through the coating layer, the sealing cover has a U-shaped cross section, an internal thread B is provided on the sealing cover, and the sealing cover is threadedly connected to the tail cover through the internal thread B.

[0010] Preferably, the electrical connector includes a contact A, a contact B, a resistor pin and a base, one end of the contact A is connected to the base, one end of the contact B passes through the base for connection, and the other end of the contact B is connected to the resistor pin. A pyrotechnic current limiting resistor is set at one end of the resistor pin, and the other end of the resistor pin extends into the sealing layer for connection.

[0011] Preferably, the electrical connector further comprises a screw sleeve and a shell, the base is arranged in the shell, the shell is connected to the tail cover, and the screw sleeve is arranged on one side of the shell.

[0012] Preferably, an external thread B is provided on the housing, and the external thread B is provided on the outer wall of the housing at one end close to the tail cover, and the electrical connector is threadably connected to the tail cover via the external thread B.

[0013] Preferably, a positioning member B is provided on the inner wall of the sealing cover, and the positioning member B is provided on one side of the cavity A.

[0014] The beneficial effects of the present invention are:

[0015] By completely sealing the silicone rubber and aerogel within the space enclosed by the tail cover and the inner cavity of the sealing cover, the utility model can reduce the resistance temperature of the pyrotechnic device inside the ignition path plug to below 120°C when the ambient temperature is 300°C, ensuring that the ignition path plug can operate for 30 minutes in a high-temperature environment of 300°C. The utility model can ensure the normal use of the ignition path plug under normal temperature conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the utility model;

[0017] Figure 2 It is a structural diagram of the utility model;

[0018] In the figure: 1-electrical connector, 11-screw sleeve, 12-housing, 13-external thread B, 2-pyrotechnic current limiting resistor, 3-sealing layer, 4-coating layer, 5-tail cover, 51-cavity A, 52-small end, 53-large end, 54-internal thread, 55-groove A, 56-external thread A, 57-positioning piece A, 6-sealing cover, 61-internal thread B, 62-positioning piece B, 7-contact piece A, 8-contact piece B, 9-resistor pin, 10-base. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the described solution.

[0020] Example:

[0021] like Figure 1 、 2As shown, a high-temperature resistant plug includes an electrical connector 1, a sealing layer 3, a tail cover 5 and a sealing cover 6. The electrical connector 1 is connected to the sealing layer 3, one end of the tail cover 5 is connected to the electrical connector 1, and the other end of the tail cover 5 is connected to the sealing cover 6. A cavity A51 is set in the tail cover 5, the tail cover 5 is made of metal, and the sealing layer 3 is set in the cavity A51.

[0022] One end of the tail cover 5 is a small end 52, and the other end of the tail cover 5 is a large end 53. An internal thread 54 is provided on one side of the small end 52, and a groove A55 is provided on one side of the large end 53. An external thread A56 is provided on the groove A55. A positioning member A57 is provided in the tail cover 5, and the positioning member A57 is provided on the side of the electrical connector 1, and the positioning member A57 is placed at the small end 52.

[0023] A coating layer 4 is disposed within the cavity A51, through which the sealing layer 3 is connected to the tail cover 5. The coating layer 4 is made of aerogel. The sealing cover 6 has a U-shaped cross-section and is provided with an internal thread B61. The sealing cover 6 is threadedly connected to the tail cover 5 via the internal thread B61 and is positioned in the groove A55. A positioning member B62 is disposed on the inner wall of the sealing cover 6, positioned toward one side of the cavity A51. The width of the positioning member B62 is greater than the width of the large end 53.

[0024] The electrical connector 1 includes a contact A7, a contact B8, a resistor pin 9 and a base 10. One end of the contact A7 is connected to the base 10, one end of the contact B8 passes through the base 10 for connection, and the other end of the contact B8 is connected to the resistor pin 9. After the resistor pin is formed, it is inserted into the connecting contact B8. A pyrotechnic current limiting resistor 2 is set at one end of the resistor pin 9, and one end of the resistor pin 9 extends into the contact B8 for connection. The pyrotechnic current limiting resistor 2 is placed in the sealing layer 3. The pyrotechnic current limiting resistor 2 is completely enclosed in the inner cavity containing aerogel and silicone rubber. The sealing layer 3 is made of silicone rubber.

[0025] The electrical connector 1 further includes a screw sleeve 11 and a housing 12 . The base 10 is disposed in the housing 12 . The housing 12 is connected to the tail cover 5 . The screw sleeve 11 is disposed on one side of the housing 12 .

[0026] In electrical connector 1, contacts A7 and B8 are used to connect to the mating end circuit. Resistor pin 9 shorts the contacts at the rear end of connector 1, providing current limiting protection and continuity in the electrical system. Screw thread 11 secures connector 1 to the mating socket after docking, and housing 12 protects the internal components of connector 1. Electrical connector 1 is a high-temperature connector with a temperature range of -65 to 450°C and an operating time of 30 minutes.

[0027] The housing 12 is provided with an external thread B13 , which is provided on an outer wall of the housing 12 at one end close to the tail cover 5 . The electrical connector 1 is threadedly connected to the tail cover 5 via the external thread B13 .

[0028] A positioning member B62 is provided on the inner wall of the sealing cover 6 , and the positioning member B62 is provided close to one side of the cavity A51 .

Claims

1. A high temperature resistant plug, characterized by: The invention comprises an electrical connector (1), a sealing layer (3), a tail cover (5) and a sealing cover (6); the electrical connector (1) is connected to the sealing layer (3); one end of the tail cover (5) is connected to the electrical connector (1); the other end of the tail cover (5) is connected to the sealing cover (6); a cavity A (51) is provided in the tail cover (5); and the sealing layer (3) is provided in the cavity A (51).

2. The high temperature resistant plug according to claim 1, characterized in that: One end of the tail cover (5) is a small end (52), and the other end of the tail cover (5) is a large end (53). An internal thread (54) is provided on one side of the small end (52), and a groove A (55) is provided on one side of the large end (53). An external thread A (56) is provided on the groove A (55). A positioning member A (57) is provided in the tail cover (5), and the positioning member A (57) is provided on one side of the electrical connector (1). The positioning member A (57) is placed at the small end (52).

3. The high temperature resistant plug according to claim 1, characterized in that: A coating layer (4) is provided in the cavity A (51), the sealing layer (3) is connected to the tail cover (5) via the coating layer (4), the sealing cover (6) has a U-shaped cross section, an internal thread B (61) is provided on the sealing cover (6), and the sealing cover (6) is threadedly connected to the tail cover (5) via the internal thread B (61).

4. The high temperature resistant plug according to claim 1, characterized in that: The electrical connector (1) comprises a contact member A (7), a contact member B (8), a resistor pin (9) and a base (10); one end of the contact member A (7) is connected to the base (10); one end of the contact member B (8) passes through the base (10) for connection; the other end of the contact member B (8) is connected to the resistor pin (9); one end of the resistor pin (9) is provided with a pyrotechnic current-limiting resistor (2); and one end of the resistor pin (9) extends into the sealing layer (3) for connection.

5. The high temperature resistant plug according to claim 4, characterized in that: The electrical connector (1) further comprises a screw sleeve (11) and a shell (12); the base (10) is arranged in the shell (12); the shell (12) is connected to the tail cover (5); and the screw sleeve (11) is arranged on one side of the shell (12).

6. The high temperature resistant plug according to claim 5, characterized in that: An external thread B (13) is provided on the housing (12), and the external thread B (13) is provided on the outer wall of the housing (12) at one end close to the tail cover (5). The electrical connector (1) is threadedly connected to the tail cover (5) via the external thread B (13).

7. The high temperature resistant plug according to claim 1, characterized in that: A positioning member B (62) is provided on the inner wall of the sealing cover (6), and the positioning member B (62) is provided close to one side of the cavity A (51).

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