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CN-120722025-B - Switch cabinet test terminal

CN120722025BCN 120722025 BCN120722025 BCN 120722025BCN-120722025-B

Abstract

The invention relates to the technical field of connection joints, in particular to a switch cabinet test terminal, which comprises a connector body, a terminal connector and a plastic deformation structure, wherein a first conductor is arranged in the connector body, a second conductor is arranged in the terminal connector, a radial bulge part is arranged outside the terminal connector, a plastic deformation cavity is formed in the radial bulge part, the plastic deformation structure comprises a plastic deformation space between the radial bulge part and the first conductor, the terminal connector is provided with a conical cavity which forms a locking connection relation with the connector body and enables the first conductor and the second conductor to be in butt joint and conduct electricity, the plastic deformation structure also comprises a spring compressed in the plastic deformation space, axial thrust pushes an axial variable combination to drive the terminal connector to retract in the axial direction, meanwhile, the spring releases energy storage to accelerate the retraction movement of the terminal connector, and the second conductor is separated from the first conductor along with the terminal connector, so that the power-off protection is automatically completed.

Inventors

  • SHI LIHAO

Assignees

  • 浙江益豪电气有限公司

Dates

Publication Date
20260508
Application Date
20250701

Claims (9)

  1. 1. The switch cabinet test terminal is characterized by comprising a connector body (1), a terminal connector (2) and a plastic deformation structure (5), wherein a first conductor (3) is arranged in the connector body (1), a second conductor (4) is arranged in the terminal connector (2), a radial bulge (202) is arranged outside the terminal connector (2), a plastic deformation cavity (203) is formed in the radial bulge (202), the plastic deformation structure (5) comprises a plastic deformation space (501) between the radial bulge (202) and the first conductor (3), the terminal connector (2) is provided with a conical cavity (201) which is in locking connection with the connector body (1) and enables the first conductor (3) and the second conductor (4) to be in butt joint and conducting, the connector body (1) is provided with a conical part (101) which is in locking connection with the conical cavity (201), the plastic deformation structure (5) also comprises a spring (503) compressed in the plastic deformation space (501), one end of the radial bulge (202) facing the plastic deformation space (501) is provided with an axial variable combination (2021), one end of the spring (503) is provided with a solid expansion thermal expansion material in the expansion thermal expansion cavity (503) in a thermal expansion state, and applies axial thrust to the axial variable combination (2021) to drive the second conductor (4) to separate from the first conductor (3).
  2. 2. The switch cabinet test terminal according to claim 1, characterized in that the axial variable combination (2021) is composed of an annular variable cavity (20211) formed on the radial bulge (202) and a plastic baffle (20212) covered on the outer end of the annular variable cavity (20211), one end of the spring (503) abutting on the axial variable combination (2021) abuts on the plastic baffle (20212), and after the plastic baffle (20212) is broken, the abutting end of the spring (503) and the plastic baffle (20212) enters the annular variable cavity (20211).
  3. 3. The switch cabinet test terminal according to claim 2, characterized in that a variable through slot (504) is arranged between the shaping deformation cavity (203) and the plastic deformation space (501), and the variable through slot (504) is inclined towards the direction of the first conductor (3).
  4. 4. A switch cabinet test terminal according to claim 3, characterized in that one end of the moulding deformation cavity (203) far away from the variable through slot (504) is provided with an expansion part (2301) with gradually increased volume, one end of the moulding deformation cavity (203) near the variable through slot (504) is provided with a contraction part (2302) with gradually decreased volume towards the variable through slot (504), and the total volume of the moulding deformation cavity (203) is larger than the volume of the moulding deformation space (501).
  5. 5. The switch cabinet test terminal according to claim 4, wherein the tail end of the extension part (2301) is provided with an indent region (2303), the terminal connector (2) is provided with an extension part (205) gradually far away from the radial protruding part (202), the extension part (205) is provided with a second through hole (204), the second conductor (4) is fixed in the second through hole (204), the second conductor (4) is fixed with a heat conducting copper ring (7), the outer wall surface of the heat conducting copper ring (7) is attached to the wall of the second through hole (204), and heat generated when the second conductor (4) conducts electricity is accumulated in the indent region (2303) through the heat conducting copper ring (7).
  6. 6. The switchgear test terminal according to claim 5, characterized in that the plastic deformation structure (5) further comprises plastic deformation grooves (505) provided on the radial projections (202), the plastic deformation grooves (505) being inclined towards the direction of the variable through grooves (504) and approaching the plastic deformation chamber (203).
  7. 7. The switchgear test terminal according to claim 6, characterized in that the connector body (1) is provided with a first through hole (102), the first conductor (3) is filled and locked in the first through hole (102), and both ends of the first conductor (3) reach both ends of the first through hole (102) and are fixed.
  8. 8. The switchgear test terminal according to claim 7, characterized in that the first conductor (3) is provided with a quick docking hole (301), one end of the second conductor (4) is provided with a first connection end (401) extending into the quick docking hole (301) and forming an electrical conduction with the first conductor (3), and the other end of the second conductor (4) is provided with a second connection end (402) for connection to the switchgear test terminal through the extension (205) of the terminal connection body (2).
  9. 9. The switchgear test terminal according to claim 8, characterized in that the extension (205) of the terminal connection body (2) is sleeved with two insulating sleeves (6), wherein the end of one insulating sleeve (6) reaches the end of the extension (205).

Description

Switch cabinet test terminal Technical Field The invention relates to the technical field of connecting joints, in particular to a switch cabinet test terminal. Background The switch cabinet is used as key node equipment of a power system, and the insulation performance of the switch cabinet directly influences the safety of a power grid. In the factory and operation, the insulation strength needs to be verified through a partial discharge test, a power frequency withstand voltage test and the like. The switch cabinet test terminal is a core conversion component for realizing test loop connection, and needs to simultaneously meet the requirements of high insulation strength (> 10 kV/mm) low partial discharge capacity (< 5 pC) repeated plugging reliability and physical compatibility of a switch cabinet inner cone interface, and consists of a connector body on the switch cabinet and a terminal connector (which can be understood as a connecting joint) matched with the connector body, wherein one end connector of the switch cabinet test terminal is connected to the connector body when the switch cabinet test terminal is used, and the other end of the switch cabinet test terminal is connected to terminal equipment. The existing switch cabinet test terminal adopts a conical sleeve structure to realize connection, and has the following problems that the shell or plastic or rubber insulating layer of the switch cabinet test terminal is softened and cracked due to high temperature generated by a certain factor when conducting electricity, the insulating property is lost, and the short circuit risk is caused. And the metal conductor is annealed and softened, namely the mechanical strength of the copper/aluminum conductor is reduced at a continuous high temperature, the contact pressure is reduced, and the temperature rise is further increased, so that a vicious circle is formed. The fire hazard is that fire is caused when the temperature exceeds the ignition point of combustible materials (such as cable jackets and peripheral equipment). Disclosure of Invention In order to solve the problems, the invention provides a switch cabinet test terminal, which comprises a connector body, a terminal connector and a plastic deformation structure, wherein a first conductor is arranged in the connector body, a second conductor is arranged in the terminal connector, a radial bulge part is arranged outside the terminal connector, a plastic deformation cavity is formed in the radial bulge part, the plastic deformation structure comprises a plastic deformation space between the radial bulge part and the first conductor, the terminal connector is provided with a conical cavity which forms a locking connection relationship with the connector body and enables the first conductor and the second conductor to be in butt joint and conductive, the connector body is provided with a conical part which forms the locking connection relationship with the conical cavity, the plastic deformation structure further comprises a spring compressed in the plastic deformation space, one end of the radial bulge part facing the plastic deformation space is provided with an axial variable combination, one end of the spring is propped against the axial variable combination, and the other end of the spring is propped against the first conductor. As a further preferable mode, the axial variable combination is composed of an annular variable cavity formed on the radial protruding portion and a plastic baffle plate covered at the outer end of the annular variable cavity, one end of the spring, which is propped against the axial variable combination, is propped against the plastic baffle plate, and after the plastic baffle plate is broken, the propped end of the spring and the plastic baffle plate enters the annular variable cavity. As a further preferable mode, a variable through groove is formed between the plastic deformation cavity and the plastic deformation space, and the variable through groove is inclined towards the direction of the first conductor. As a further preferable mode, one end of the plastic deformation cavity far away from the variable through groove is provided with an expansion part with gradually increased volume, one end of the plastic deformation cavity near the variable through groove is provided with a shrinkage part with gradually decreased volume towards the variable through groove, and the total volume of the plastic deformation cavity is larger than the volume of the plastic deformation space. As a further preferable mode, the tail end of the expansion part is provided with a concave area, the terminal connecting body is provided with an extension part gradually far away from the radial protruding part, a second through hole is formed in the extension part, the second conductor is fixed in the second through hole, a heat conducting copper ring is fixed on the second conductor, the outer wall surface of the heat conducting copper rin