CN110783743A

CN110783743A - Novel 25kV high-voltage box electric connector

Info

Publication number: CN110783743A
Application number: CN201911111051.0A
Authority: CN
Inventors: 衡启林; 谢莉; 刘向阳
Original assignee: Chengdu Hongming Electronics Co Ltd
Current assignee: Chengdu Hongming Electronics Co Ltd
Priority date: 2019-11-14
Filing date: 2019-11-14
Publication date: 2020-02-11

Abstract

The invention discloses a novel 25kV high-voltage box electric connector which comprises a plug shell and a socket shell, wherein the socket shell is mutually spliced with the plug shell, the plug shell comprises a plug seat plate and a plug splicing part, an anti-misoperation splicing boss is convexly arranged on the outer side wall of the plug splicing part, and a plurality of contact element mounting cylinders A are arranged in a splicing cavity A of the plug splicing part; the socket shell is internally provided with a plug cavity B, a false plug-in preventing concave surface is arranged in the plug cavity B of the socket shell, a plurality of contact mounting cylinder B is arranged in the plug cavity A, a high-voltage contact pin contact element is assembled in the contact mounting cylinder A in a matching manner, one end of the high-voltage contact pin contact element is provided with a contact pin contact part, a high-voltage jack contact element is assembled in the contact mounting cylinder B in a matching manner, and the other end of the high-voltage jack contact element is provided with. The invention adopts a creepage structure, can be applied to high voltage of more than 25kV, has simple and safe operation, can prevent misplug, and has the advantages of small volume, light weight, no glue filling, easy operation, convenient maintenance and the like.

Description

Novel 25kV high-voltage box electric connector

Technical Field

The invention relates to a 25kV high-voltage box electric connector, in particular to a novel 25kV high-voltage box electric connector.

Background

The connector is a functional element for making, breaking or converting a circuit or an optical channel by the action of an electric signal or an optical signal and a mechanical force, is used for connecting the electric signal or the optical signal between devices, assemblies, equipment and systems, transmitting the signal or electromagnetic energy, and keeping the signal distortion and the energy loss from system to system unchanged. With the development of scientific technology, electronic devices become more complex and have higher functional requirements, and therefore new and higher requirements on the performance and reliability of connectors are also put forward. Such as long life, high reliability, miniaturization, light weight, adoption of new technology, convenience for users, suitability for maintenance, cost saving and investment saving, etc. This makes the process links such as structural design, manufacturing process, assembly of connector technological degree of difficulty increase, and unreliable factor increases, and becomes more complicated. At present, high-voltage connectors used in domestic equipment (equipment) mostly adopt a glue pouring structure technology, a lead and a connector are in a screw compression joint structure technology and the like, so that the product manufacturing period is long and the manufacturing cost is high; the product parts cannot be replaced, the maintainability is poor, and only the whole set of product can be scrapped when the product parts have problems; the operation is complex, and the personal safety of operators is affected under high-pressure environment.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the novel 25kV high-voltage box electric connector which is small in size, light in weight, free of glue filling, easy to operate and convenient to maintain.

The purpose of the invention is realized by the following technical scheme:

a novel 25kV high-voltage box electric connector comprises a plug shell and a socket shell which is mutually spliced with the plug shell, wherein the plug shell comprises a plug seat plate and a plug splicing part, an anti-misoperation splicing boss is convexly arranged on the outer side wall of the plug splicing part, a splicing cavity A is formed in the plug splicing part, and a plurality of contact element mounting cylinders A are arranged in the splicing cavity A of the plug splicing part; the socket comprises a socket shell and a plurality of contact mounting cylinders A, wherein the socket shell is internally provided with a plug cavity B which is in plug connection with a plug, the plug cavity B of the socket shell is internally provided with an anti-misplug concave surface which is matched with an anti-misplug boss, the plug cavity A of the plug connection part is internally provided with a plurality of contact mounting cylinders B, the number of the contact mounting cylinders B is equal to that of the contact mounting cylinders A, the contact mounting cylinders B correspond to the contact mounting cylinders A one by one, the end parts of the contact mounting cylinders B are provided with plug-in parts, and the contact mounting cylinders A are provided with plug-in grooves which; the cooperation is equipped with the high-pressure contact pin contact in the contact installation section of thick bamboo A, high-pressure contact pin contact one end has contact pin contact site, the high-pressure contact pin contact other end has connecting cylinder A, the cooperation is equipped with the high-pressure jack contact in the contact installation section of thick bamboo B, high-pressure jack contact one end has connecting cylinder B, the high-pressure jack contact other end has the grafting cylinder of pegging graft with contact pin contact site correspondence.

In order to better realize the invention, a contact element assembly cavity A penetrates through the interior of the contact element mounting cylinder A, the contact element assembly cavity A penetrates through the socket board, and the high-voltage contact pin contact element is provided with a boss, a contact pin connecting middle part, a needle cylinder A and a step part A between a contact part of the contact pin and the connection cylinder A in sequence; the contact part of the contact pin is positioned in an insertion groove of a contact part assembly cavity A, the contact part assembly cavity A is provided with a contact pin connection middle matching hole matched with the contact middle part of the contact pin, the contact part assembly cavity A is provided with a needle cylinder hole A matched with the needle cylinder A, the contact part assembly cavity A is provided with a connecting cylinder hole A matched with the connecting cylinder A, a step hole A matched with the step part A is formed between the connecting cylinder hole A and the needle cylinder hole A, and the boss is tightly matched and positioned in the contact pin connection middle matching hole; the high-voltage contact pin contact piece is integrally made of a conductive material.

Preferably, a contact fitting cavity B is formed in the contact mounting barrel B in a penetrating manner, and a step part B, a needle barrel B and a contact pin middle part B are sequentially arranged between the connecting barrel B and the inserting needle barrel of the high-voltage jack contact; the contact element assembly cavity B is provided with a connecting cylinder hole B matched with the connecting cylinder B, the contact element assembly cavity B is provided with a needle cylinder hole B matched with the needle cylinder B, the contact element assembly cavity B is provided with a contact pin middle matching hole matched with the contact pin middle B, the contact element assembly cavity B is provided with an insertion needle cylinder hole matched with the insertion needle cylinder, the side part of the insertion needle cylinder is symmetrically provided with strip-shaped gaps, the insertion needle cylinder hole is positioned in the insertion part of the contact element mounting cylinder B, and a step hole B matched with the step part B is formed between the connecting cylinder hole B and the needle cylinder hole B; the high-voltage jack contact piece is integrally made of a conductive material.

Preferably, the outer diameter of the middle part of the contact pin connection is smaller than the outer diameter of the boss, the outer diameter of the middle part of the contact pin connection is smaller than the outer diameter of the needle cylinder A, one end of the middle part of the contact pin connection is tightly matched and inserted in the boss, the other end of the middle part of the contact pin connection is tightly matched and inserted in the needle cylinder A, and an elastic clamping claw matched with the middle part of the contact pin connection is assembled in a contact pin connection middle matching hole of the contact mounting.

Preferably, the outer diameter of the middle part B of the contact pin is smaller than that of the needle cylinder B, the outer diameter of the middle part B of the contact pin is smaller than that of the insertion needle cylinder, one end of the middle part B of the contact pin is tightly matched and inserted into the needle cylinder B, the other end of the middle part B of the contact pin is tightly matched and inserted into the insertion needle cylinder, and the elastic clamping claw matched with the middle part B of the contact pin is assembled in the middle matching hole of the contact pin of the contact mounting.

Preferably, the elastic clamping jaw is integrally cylindrical, the side part of the elastic clamping jaw is vertically provided with a notch, two sides of the elastic clamping jaw are symmetrically provided with elastic clamping jaw sheet grooves, and the elastic clamping jaw is outwards turned over at the position where the elastic clamping jaw sheet groove is located.

Preferably, the number of the contact mounting cylinders B is six, the number of the contact mounting cylinders A is one to one, the plug shell and the socket shell are mutually inserted, and an inserting sealing gasket is arranged between the plug shell and the socket shell.

Preferably, a plug external piece is closely matched and inserted in the connecting cylinder A of the high-voltage contact pin, and a socket external piece is closely matched and inserted in the connecting cylinder B of the high-voltage jack contact piece.

Preferably, the connecting cylinder a is fitted with a sealing plug matching with the plug outer connector in the cylinder, and the connecting cylinder B is fitted with a sealing plug matching with the socket outer connector in the cylinder.

Preferably, a sealing ring is sleeved outside the pin contact part of the high-voltage pin contact piece, and the sealing ring is tightly attached to the boss.

Compared with the prior art, the invention has the following advantages and beneficial effects:

(1) the plug shell and the socket shell are designed into complex creepage structures, the high-voltage contact piece interval is 15mm multiplied by 15mm, the designed structures are not filled with glue, and the voltage resistance of products is more than or equal to 25 kV; the electric connector adopts a high-voltage wire compression joint structure, so that the operation is simple and the connection is more reliable.

(2) The product of the invention is not glue-pouring, the operation is easier, the technical index requirement of withstand voltage being more than or equal to 25kV is met, the part of the plug shell for installing the contact pin assembly is designed into a coaxial 2-step cylinder, and the structural design of creepage size is increased; the socket shell mounting jack component part is designed into a coaxial 2-step cylinder, and the creepage size is increased; when the plug is connected with the socket in an inserting mode (in the working process), the plug shell is provided with the pin inserting assembly, and the pin inserting assembly is sleeved (covered) outside the small cylinder of the socket shell provided with the jack assembly, so that the size of a creepage structure is structurally increased, and the high-voltage resistance of a product is improved; meanwhile, the sealing ring is arranged on the contact pin, so that the product is ensured not to generate high-voltage electric arc under the high-voltage working condition.

(3) The invention designs a novel high-voltage box connector which has reliable performance, small structural size, light weight, no glue filling, easy operation, convenient maintenance, simple operation and safety. In the aspect of arc prevention design, glue filling and sealing technology is not needed, a floating structure and a clamping claw structure are arranged in the electric connector, and compared with a traditional product which adopts a screw pressing line or a glue filling structure, the electric connector is easier to operate and more convenient to maintain.

(4) The invention is fixed by the bouncing and contracting of the floating elastic claw, and the high-voltage contact piece and the high-voltage lead are taken and disassembled, so that the operation is simple, and the product is convenient to maintain.

(5) In order to facilitate maintenance and facilitate operation, the high-voltage contact pin and the high-voltage jack adopt a structural design capable of being quickly detached, the high-voltage contact pin (the high-voltage jack) and the high-voltage lead adopt a compression joint structural design, and the plug and the socket adopt a steel wire thread insert to be connected with a screw rod in a locking way.

(6) The plug shell and the socket shell are designed with structures for preventing misplug and misplug so as to ensure that each circuit of a multi-core high-voltage product has correct functions and ensure the normal work of the product; meanwhile, the high-voltage box socket mounting structure is designed outside the cavity instead of four corners of the inner wall of the conventional cavity, so that the inside of the cavity of the high-voltage box connector is more easily sealed; the product has more delicate and beautiful appearance design.

Drawings

Fig. 1 is a schematic perspective view of a plug housing;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is a schematic structural view of a high voltage contact pin contact;

fig. 4 is a schematic perspective view of the socket housing;

FIG. 5 is a cross-sectional view of FIG. 4;

FIG. 6 is a schematic diagram of a high voltage socket contact;

fig. 7 is a schematic perspective view of the plug housing and the socket housing after being plugged;

FIG. 8 is a partial cross-sectional view of the plug housing and the receptacle housing after mating;

FIG. 9 is a schematic structural view of the elastic claw;

fig. 10 is a schematic perspective view of the sealing plug;

fig. 11 is a schematic view of the construction of the insert gasket.

Wherein, the names corresponding to the reference numbers in the drawings are:

1-plug housing, 2-plug base plate, 21-screw hole, 3-plug socket, 31-socket cavity a, 32-mis-plug boss, 4-contact mounting barrel a, 41-contact mounting cavity a, 5-socket housing, 51-socket cavity B, 52-mis-plug concave surface, 6-contact mounting barrel B, 61-contact mounting cavity B, 7-high-voltage socket contact, 71-connecting barrel B, 72-step B, 73-needle barrel B, 74-needle middle B, 75-socket needle barrel, bar notch, 8-high-voltage needle contact, 81-needle contact, 82-boss 751, 83-needle connection middle, 84-needle barrel a, 85-step a, 86-connecting barrel a, 9-sealing plug, 10-elastic sealing plug jaw, 101-elastic claw, 11-sealing ring, 12-plug sealing gasket, 13-plug external piece, 14-socket external piece.

Detailed Description

The present invention will be described in further detail with reference to the following examples:

examples

As shown in fig. 1-11, a novel 25kV high-voltage box electric connector comprises a plug housing 1 and a socket housing 5 mutually inserted with the plug housing 1, wherein the plug housing 1 comprises a plug seat plate 2 and a plug insertion part 3, an anti-misplug boss 32 is convexly arranged on the outer side wall of the plug insertion part 3, a plug cavity a31 is formed inside the plug insertion part 3, and a plurality of contact mounting cylinders a4 are arranged in the plug cavity a31 of the plug insertion part 3. The socket shell 5 is internally provided with a plug cavity B51 which is plugged with the plug plugging part 3, a wrong plugging prevention concave surface 52 which is matched with the wrong plugging prevention boss 32 is arranged in the plug cavity B51 of the socket shell 5, when the socket shell is used, the plug shell 1 and the socket shell 5 are plugged with each other, the plug plugging part 3 is matched and inserted into the plug cavity B51 of the socket shell 5, the wrong plugging prevention concave surface 52 of the socket shell 5 and the wrong plugging prevention boss 32 of the plug plugging part 3 are mutually fooled or misplug matched, and the condition of wrong plugging can be effectively avoided. A plurality of contact mounting cylinders B6 are arranged in a plug cavity A31 of the plug insertion part 3, the number of the contact mounting cylinders B6 is equal to that of the contact mounting cylinders A4, the contact mounting cylinders B6 are in one-to-one correspondence, insertion parts are arranged at the ends of the contact mounting cylinders B6, and insertion grooves matched with the insertion parts of the contact mounting cylinders B6 for insertion are formed in the contact mounting cylinders A4, as shown in FIG. 8, the insertion parts of the contact mounting cylinders B6 are correspondingly inserted into the insertion grooves of the contact mounting cylinders A4, so that the accurate matching degree of insertion between the pin contact parts 81 and the plug needle cylinder 75 can be ensured, electric arcs can be prevented from occurring when the pin contact parts 81 are inserted into the plug needle cylinder 75, and the interference of the electric arcs on other parts can be effectively prevented.

As shown in fig. 8, a high-voltage pin contact 8 is fitted into the contact mounting cylinder a4, a pin contact portion 81 is provided at one end of the high-voltage pin contact 8, a connection cylinder a86 is provided at the other end of the high-voltage pin contact 8, a high-voltage socket contact 7 is fitted into the contact mounting cylinder B6, a connection cylinder B71 is provided at one end of the high-voltage socket contact 7, and a socket cylinder 75 corresponding to the pin contact portion 81 is provided at the other end of the high-voltage socket contact 7. As shown in fig. 1, the edge of the plug seat board 2 is penetrated and opened with four screw holes 21, the four screw holes 21 are arranged in a rectangular shape, as shown in fig. 4, four embedded steel wire thread inserts are embedded in the socket shell 5, the four embedded steel wire thread inserts correspond to the four screw holes 21 one by one, the four screw holes 21 are correspondingly penetrated by the four screws, the four embedded steel wire thread inserts are used for realizing the threaded connection and locking of the plug seat board 2 and the socket shell 5, during the use, after the plug shell 1 and the socket shell 5 are mutually inserted, the plug shell 1 can be reinforced by the four screws to be connected with the socket shell 5.

As shown in fig. 2 and 8, a contact mounting cavity a41 is formed through the contact mounting barrel a4, and a contact mounting cavity a41 penetrates through the socket plate 2, and as shown in fig. 3, the high-voltage pin contact 8 has a boss 82, a pin connecting middle part 83, a needle cylinder a84 and a step part a85 between a pin contact part 81 and a connecting barrel a86 in sequence. The contact pin contact part 81 is positioned in the insertion groove of the contact piece assembly cavity A41, the contact piece assembly cavity A41 is provided with a contact pin connection middle matching hole matched with the contact pin connection middle 83, the contact piece assembly cavity A41 is provided with a needle cylinder hole A matched with the needle cylinder A84, the contact piece assembly cavity A41 is provided with a connecting cylinder hole A matched with the connecting cylinder A86, a step hole A matched with the step part A85 is formed between the connecting cylinder hole A and the needle cylinder hole A, and the boss 82 is tightly matched and positioned in the contact pin connection middle matching hole. The high-voltage pin contact 8 is entirely made of an electrically conductive material. As shown in fig. 3, the outer diameter of the pin connecting middle part 83 is smaller than the outer diameter of the boss 82, the outer diameter of the pin connecting middle part 83 is smaller than the outer diameter of the syringe a84, one end of the pin connecting middle part 83 is tightly fitted and plugged in the boss 82, the other end of the pin connecting middle part 83 is tightly fitted and plugged in the syringe a84, the elastic claw 10 matched with the pin connecting middle part 83 is assembled in the pin connecting middle part matching hole of the contact mounting tube a4, and the elastic claw 10 at this position is favorable for tightly assembling and maintaining the position accuracy of the pin connecting middle part 83.

As shown in fig. 5 and 8, a contact mounting barrel B6 has a contact mounting cavity B61 penetrating therein, and as shown in fig. 6, the high-voltage jack contact 7 has a step B72, a barrel B73 and a pin center B74 in sequence between a connector barrel B71 and a plug barrel 75. The contact assembly cavity B61 is provided with a connecting cylinder hole B matched with the connecting cylinder B71, the contact assembly cavity B61 is provided with a cylinder hole B matched with the cylinder B73, the contact assembly cavity B61 is provided with a contact pin middle matching hole matched with the contact pin middle B74, the contact assembly cavity B61 is provided with a plug cylinder hole matched with the plug cylinder 75, the lateral part of the plug cylinder 75 is symmetrically provided with strip-shaped gaps 751 (the strip-shaped gaps 751 can increase the elastic force of the plug cylinder 75 and facilitate the smooth insertion of a contact part 81 of a contact pin), the plug cylinder hole is positioned in the plug part of the contact mounting cylinder B6, and a step hole B matched with the step part B72 is formed between the connecting cylinder hole B and the cylinder hole B. The high-voltage socket contact 7 is entirely made of an electrically conductive material. As shown in fig. 6, the outer diameter of the middle B74 of the pin is smaller than that of the cylinder B73, the outer diameter of the middle B74 of the pin is smaller than that of the cylinder 75, one end of the middle B74 of the pin is closely fitted and inserted into the cylinder B73, the other end of the middle B74 of the pin is closely fitted and inserted into the cylinder 75, the elastic claw 10 matched with the middle B74 of the pin is fitted in the middle fitting hole of the pin of the contact mounting cylinder B6, and the elastic claw 10 at this position is favorable for closely fitting and maintaining the position accuracy of the middle B74 of the pin.

As shown in fig. 9, the elastic claw 10 of the present invention is preferably cylindrical, the side of the elastic claw 10 is vertically provided with a gap, two sides of the elastic claw 10 are symmetrically provided with elastic claw sheet grooves, and the elastic claw 10 is provided with an elastic claw sheet 101 at the position of the elastic claw sheet groove in an outward turning manner. The invention is fixed by the bouncing and contracting of the floating elastic claw 10, and the operation is simple and the product maintenance is convenient when the high-voltage contact element and the high-voltage lead are taken and disassembled.

As shown in fig. 8 and 11, the number of the contact mounting cylinders B6 is six and the number of the contact mounting cylinders a4 is one-to-one, the plug housing 1 and the receptacle housing 5 are inserted into each other, and the insertion gaskets 12 are provided between the plug housing 1 and the receptacle housing 5, and the insertion gaskets 12 are advantageous for preventing high-voltage arcs from being generated.

As shown in fig. 8, the connector barrel a86 of the high-voltage pin contact 8 is fitted with the plug external connector 13, and the connector barrel B71 of the high-voltage socket contact 7 is fitted with the socket external connector 14. The connector barrel a86 is fitted with a sealing plug 9 (see fig. 10) that mates with the plug extension 13 and the connector barrel B71 is fitted with a sealing plug 9 that mates with the receptacle extension 14. The pin contact part 81 of the high-voltage pin contact element 8 is externally sleeved with a sealing ring 11, the sealing ring 11 is tightly attached to the boss 82, and the sealing ring 11 can prevent electric arcs from being generated.

Before the insertion and use, six high-voltage pin contact elements 8 are correspondingly assembled in a contact element assembly cavity A41 of the plug shell 1, and a pin connecting middle part 83 of each high-voltage pin contact element 8 is tightly assembled in a pin connecting middle part matching hole of a contact element mounting cylinder A4 through an elastic claw 10; six high-voltage socket contacts 7 are correspondingly fitted in the contact fitting cavities B61 of the socket housing 5, and the pin central portions B74 of the high-voltage socket contacts 7 are tightly fitted in the pin central fitting holes of the contact mounting barrel B6 by the resilient claws 10. When the plug is inserted, the plug housing 1 and the socket housing 5 are correspondingly inserted, the insertion part of the contact mounting cylinder B6 is correspondingly inserted into the insertion groove of the contact mounting cylinder a4, and the pin contact part 81 of the high-voltage pin contact 8 is correspondingly inserted into the insertion needle cylinder 75 of the high-voltage jack contact 7, so that the one-to-one electrical insertion between all the high-voltage pin contacts 8 on the plug housing 1 and all the high-voltage jack contacts 7 of the socket housing 5 is realized, and a signal circuit is conducted. In order to prevent the plug housing 1 and the socket housing 5 from falling off after being plugged, the plug housing 1 and the socket housing 5 are fixedly connected through four screws.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a novel 25kV high voltage box electric connector, includes plug housing (1) and socket shell (5) of pegging graft each other with plug housing (1), its characterized in that: the plug shell (1) comprises a plug seat plate (2) and a plug plugging part (3), wherein an anti-misplugging boss (32) is convexly arranged on the outer side wall of the plug plugging part (3), a plugging cavity A (31) is formed inside the plug plugging part (3), and a plurality of contact mounting cylinders A (4) are arranged in the plugging cavity A (31) of the plug plugging part (3); an inserting cavity B (51) which is inserted with the plug inserting part (3) is formed in the socket shell (5), an anti-misinserting concave surface (52) which is matched with the anti-misinserting boss (32) is arranged in the inserting cavity B (51) of the socket shell (5), a plurality of contact mounting cylinders B (6) are arranged in the inserting cavity A (31) of the plug inserting part (3), the number of the contact mounting cylinders B (6) is equal to that of the contact mounting cylinders A (4) and corresponds to that of the contact mounting cylinders A (4), inserting parts are formed in the end parts of the contact mounting cylinders B (6), and inserting grooves which are matched with the inserting parts of the contact mounting cylinders B (6) for inserting are formed in the contact mounting cylinders A (4); the cooperation is equipped with high-pressure contact pin contact member (8) in contact member installation section of thick bamboo A (4), high-pressure contact pin contact member (8) one end has contact pin contact portion (81), high-pressure contact pin contact member (8) other end has connecting cylinder A (86), the cooperation is equipped with high-pressure jack contact member (7) in contact member installation section of thick bamboo B (6), high-pressure jack contact member (7) one end has connecting cylinder B (71), high-pressure jack contact member (7) other end has and corresponds grafting cylinder (75) of pegging graft with contact pin contact portion (81).

2. A novel 25kV high voltage box electrical connector according to claim 1, wherein: a contact fitting cavity A (41) penetrates through the interior of the contact mounting barrel A (4), the contact fitting cavity A (41) penetrates through the socket board (2), and the high-voltage contact pin (8) is sequentially provided with a boss (82), a contact pin connecting middle part (83), a needle cylinder A (84) and a step part A (85) between a contact part (81) of the contact pin and a connecting barrel A (86); the contact pin contact part (81) is positioned in an insertion groove of a contact piece assembly cavity A (41), the contact piece assembly cavity A (41) is provided with a contact pin connection middle part matching hole matched with a contact pin connection middle part (83), the contact piece assembly cavity A (41) is provided with a needle cylinder hole A matched with a needle cylinder A (84), the contact piece assembly cavity A (41) is provided with a connection cylinder hole A matched with a connection cylinder A (86), and a step hole A matched with a step part A (85) is formed between the connection cylinder hole A and the needle cylinder hole A; the high-voltage contact pin contact piece (8) is integrally made of a conductive material.

3. A novel 25kV high voltage box electrical connector according to claim 1, wherein: a contact fitting cavity B (61) penetrates through the interior of the contact mounting barrel B (6), and a step part B (72), a needle barrel B (73) and a needle inserting middle part B (74) are sequentially arranged between the connecting barrel B (71) and the inserting needle barrel (75) of the high-voltage jack contact (7); the contact piece assembling cavity B (61) is provided with a connecting cylinder hole B matched with the connecting cylinder B (71), the contact piece assembling cavity B (61) is provided with a needle cylinder hole B matched with the needle cylinder B (73), the contact piece assembling cavity B (61) is provided with a needle pin middle matching hole matched with the needle pin middle part B (74), the contact piece assembling cavity B (61) is provided with an inserting needle cylinder hole matched with the inserting needle cylinder (75), strip-shaped notches (751) are symmetrically formed in the side part of the inserting needle cylinder (75), and a step hole B matched with the step part B (72) is formed between the connecting cylinder hole B and the needle cylinder hole B; the high-voltage jack contact piece (7) is integrally made of a conductive material.

4. A novel 25kV high voltage box electrical connector according to claim 2, wherein: the outer diameter of the middle pin connecting part (83) is smaller than that of the boss (82), the outer diameter of the middle pin connecting part (83) is smaller than that of the needle cylinder A (84), one end of the middle pin connecting part (83) is tightly matched and inserted in the boss (82), the other end of the middle pin connecting part (83) is tightly matched and inserted in the needle cylinder A (84), and an elastic claw (10) matched with the middle pin connecting part (83) is assembled in a middle pin connecting part matching hole of the contact mounting cylinder A (4).

5. A novel 25kV high voltage box electrical connector according to claim 3, wherein: the outer diameter of the middle part B (74) of the contact pin is smaller than that of the needle cylinder B (73), the outer diameter of the middle part B (74) of the contact pin is smaller than that of the insertion needle cylinder (75), one end of the middle part B (74) of the contact pin is tightly matched and inserted in the needle cylinder B (73), the other end of the middle part B (74) of the contact pin is tightly matched and inserted in the insertion needle cylinder (75), and the elastic clamping claw (10) matched with the middle part B (74) of the contact pin is assembled in the middle matching hole of the contact pin of the contact mounting cylinder B (6).

6. A novel 25kV high voltage box electrical connector as claimed in claim 4 or 5, wherein: the elastic clamping jaw is characterized in that the elastic clamping jaw (10) is integrally cylindrical, a gap is vertically formed in the side part of the elastic clamping jaw (10), elastic jaw sheet grooves are symmetrically formed in two sides of the elastic clamping jaw (10), and elastic jaw sheets (101) are outwards turned at positions, located in the elastic jaw sheet grooves, of the elastic clamping jaw (10).

7. A novel 25kV high voltage box electrical connector according to claim 1, wherein: the number of the contact mounting cylinders B (6) and the number of the contact mounting cylinders A (4) are six and in one-to-one correspondence, the plug shell (1) and the socket shell (5) are mutually spliced, and an inserting sealing gasket (12) is arranged between the plug shell (1) and the socket shell (5).

8. A novel 25kV high voltage box electrical connector according to claim 1, wherein: a plug external connector (13) is closely matched and inserted in a connecting cylinder A (86) of the high-voltage pin contact element (8), and a socket external connector (14) is closely matched and inserted in a connecting cylinder B (71) of the high-voltage jack contact element (7).

9. The novel 25kV high voltage box electrical connector of claim 8, wherein: the connecting cylinder A (86) is internally provided with a sealing plug (9) matched with the plug external connector (13) in a matching way, and the connecting cylinder B (71) is internally provided with a sealing plug (9) matched with the socket external connector (14) in a matching way.

10. A novel 25kV high voltage box electrical connector according to claim 2, wherein: and a sealing ring (11) is sleeved outside a pin contact part (81) of the high-voltage pin contact element (8), and the sealing ring (11) is tightly attached to the boss (82).