CN216750395U - High-voltage electric connection through-wall terminal - Google Patents
High-voltage electric connection through-wall terminal Download PDFInfo
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- CN216750395U CN216750395U CN202122950084.3U CN202122950084U CN216750395U CN 216750395 U CN216750395 U CN 216750395U CN 202122950084 U CN202122950084 U CN 202122950084U CN 216750395 U CN216750395 U CN 216750395U
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- bar connecting
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Abstract
The utility model relates to a wall-through terminal for high-voltage electric connection, which comprises a copper conductor and a shaft sleeve; the copper conductor comprises a copper bar connecting part, one end of the copper bar connecting part is provided with an internal threaded hole, the other end of the copper bar connecting part opposite to the internal threaded hole is provided with a cable connecting part, and the copper bar connecting part is provided with an anti-falling groove; the axle sleeve is including cladding insulating block on copper bar connecting portion surface, and the insulating block is stretched out to the internal thread hole one end terminal surface of copper bar connecting portion, the insulating block is inside to have to end the insulating inner flange of position complex with the anticreep groove, the insulating block outside has insulating outer flange, and the insulating outer flange one end hoop that is close to the cable connecting portion is equipped with the sealing washer. The utility model avoids the risk of rotation and loosening of the interface copper bar fixed by a single point through the copper conductor, and improves the reliability of the converter; the through-wall terminal shaft sleeve is directly used for mechanical fixed installation, so that the terminal falling risk caused by loosening of the insert is avoided; through the sealing washer design, realize the sealed of converter, practice thrift the cost of sealing design separately.
Description
Technical Field
The utility model relates to a pull converter's high-pressure adapting unit field, specifically a high-voltage electricity is connected with wearing wall terminal.
Background
In the design of the traction converter of the rail transit locomotive, an external high-voltage interface of the converter is involved, and the converter is used for carrying out high-voltage connection with a whole locomotive after loading, completing high-voltage input and output of the traction converter and realizing the function that the converter supplies power for a traction motor.
When the converter has a sealing design requirement, a high-voltage copper bar or a wiring terminal in the converter needs to penetrate through a sealed box body structure and extend out of a sealing area, and the design requirement of a high-voltage interface is met.
The inner conductor of the high-voltage wall-penetrating terminal for the existing locomotive converter is designed as an internal thread, and is fixed with a single point between conductors connected with an external interface, so that the risk of rotation and loosening exists. The mechanical fixation adopts an insert design, the processing technology is complex, and the risk of loosening the insert exists; the self-sealing structure is not provided, an additional sealing design scheme is required, and otherwise, the sealing design requirement cannot be met.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the connection pine that current locomotive converter exists with high pressure wall terminal and take off the risk, provide a high-voltage electricity is connected with wall terminal.
The utility model discloses a realize through following technical scheme: a wall-through terminal for high-voltage electric connection comprises a copper conductor and a shaft sleeve;
the copper conductor comprises a copper bar connecting part with an internal threaded hole at one end, a cable connecting part is arranged at the other end of the copper bar connecting part opposite to the internal threaded hole, an anti-falling groove is formed in the copper bar connecting part, and at least one cable connecting hole is formed in the cable connecting part;
the axle sleeve is including cladding insulating block on copper bar connecting portion surface, and the internal thread hole one end terminal surface of copper bar connecting portion stretches out insulating block, insulating block inside have with anticreep groove end a complex insulating inner flange, the insulating block outside has insulating outer flange, be equipped with at least one mounting hole on the insulating outer flange, the insulating outer flange one end hoop that is close to cable connecting portion is equipped with the sealing washer.
As the utility model discloses technical scheme's further improvement, copper bar connecting portion are the cylinder structure, and the internal thread hole is located one of them end face, and the cable connecting portion are located one end terminal surface in addition.
As the utility model discloses technical scheme's further improvement, anticreep groove is located copper bar connecting portion whole body, and anticreep groove arranges along copper bar connecting portion whole body hoop.
As the utility model discloses technical scheme's further improvement, the insulating block extends to cable connecting portion department, and spacing cooperation between cable connecting portion and the insulating block.
As a further improvement of the technical scheme of the utility model, the cable connecting portion are flat body of rod structure.
As a further improvement of the technical scheme of the utility model, the insulating block is the cylinder structure.
As the utility model discloses technical scheme's further improvement, insulating outer flange outer fringe is the quadrangle, and the mounting hole on the insulating outer flange is four, and is located four tetragonal bights respectively.
As the utility model discloses technical scheme's further improvement, insulating outer flange is located the middle part of insulating block.
As the technical scheme of the utility model further improve, copper bar connecting portion and cable connecting portion in the copper conductor all adopt the red copper material to make.
As the further improvement of the technical proposal of the utility model, the insulating block, the insulating inner flange and the insulating outer flange in the shaft sleeve are all made of unsaturated polyester glass fiber reinforced molding plastic.
High voltage electricity is connected with wearing wall terminal compares with prior art, has following beneficial effect:
1) through the copper conductor, a cabinet external interface copper bar is cancelled, the risk that the interface copper bar fixed by a single point is rotated and loosened is avoided, and the reliability of the converter is improved;
2) the through-wall terminal shaft sleeve is directly used for mechanical fixed installation, so that the terminal falling risk caused by loosening of the insert is avoided;
3) through the sealing washer design, realize the sealed of converter, practice thrift the cost of sealed design separately.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is the utility model discloses a high voltage electricity is connected with the schematic structure of wall terminal. In the figure, (a) is a schematic structural view in one of the view directions. In the figure, (b) is a schematic structural view in another view direction.
Fig. 2 is a front view of the through-wall terminal for high-voltage electrical connection.
Fig. 3 is a right side view of fig. 2.
Fig. 4 is a left side view of fig. 2.
Fig. 5 is a longitudinal sectional view of fig. 2.
Fig. 6 is a usage status diagram of the wall-through terminal for high voltage electrical connection of the present invention.
In the figure: 1-copper conductor, 101-internal thread hole, 102-copper bar connecting part, 103-cable connecting part, 104-cable connecting hole and 105-anti-drop groove; 2-shaft sleeve, 201-insulating block, 202-insulating inner flange, 203-insulating outer flange, 204-mounting hole and 205-sealing ring; 3-copper bar; 4-a cable; and 5, mounting the plate.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 5, the present invention provides a specific embodiment of a wall-through terminal for high-voltage electrical connection, which includes a copper conductor 1 and a shaft sleeve 2;
the copper conductor 1 comprises a copper bar connecting part 102 with an internal threaded hole 101 at one end, a cable connecting part 103 is arranged at the other end of the copper bar connecting part 102 opposite to the internal threaded hole 101, an anti-falling groove 105 is arranged on the copper bar connecting part 102, and at least one cable connecting hole 104 is arranged on the cable connecting part 103;
the shaft sleeve 2 comprises an insulating block 201 coated on the outer surface of the copper bar connecting portion 102, one end face of one end of an internal thread hole 101 of the copper bar connecting portion 102 extends out of the insulating block 201, an insulating inner flange 202 matched with the anti-falling groove 105 in a stop mode is arranged inside the insulating block 201, an insulating outer flange 203 is arranged outside the insulating block 201, at least one mounting hole 204 is formed in the insulating outer flange 203, and a sealing ring 205 is arranged at one end, close to the cable connecting portion 103, of the insulating outer flange 203 in the circumferential direction.
In the embodiment, the through-wall terminal for high-voltage electric connection comprises a copper conductor 1 and a shaft sleeve 2, wherein the shaft sleeve 2 is an insulating structure at the periphery of the copper conductor 1. In this embodiment, the end surface of the copper bar connecting portion 102 having the internal threaded hole 101 is a planar structure, and is an electrical connection surface of the copper conductor 1, so as to be conveniently connected with the horizontal copper bar 3. The cable connection hole 104 of the cable connection portion 103 is used for connecting with the cable 4 of the locomotive.
During specific implementation, a sealing groove is annularly formed in one end, close to the cable connecting portion 103, of the insulating outer flange 203, the sealing ring 205 is embedded in the sealing groove, and the sealing ring 205 protrudes out of the plane of the insulating outer flange 203 by a certain height.
In the embodiment, the copper conductor 1 and the shaft sleeve 2 are nested, the copper bar connecting part 102 is provided with the anti-falling groove 105 in advance, and in the casting process of the shaft sleeve 2, the anti-falling groove 105 is filled with an insulating material, so that the anti-falling and anti-rotation positioning effects between the copper conductor 1 and the shaft sleeve 2 are achieved. Specifically, the copper bar connecting portion 102 and the cable connecting portion 103 are of an integrated structure, wherein the insulating block 1, the inner insulating flange 202 and the outer insulating flange 203 are of an integrated structure.
Further, the mounting hole 204 on the external insulating flange 203 is a through hole structure, the external insulating flange 203 is located above the mounting plate 5 of the current transformer, and the bolt penetrates through the mounting hole 204 on the external insulating flange 203 and the mounting plate 5 and is fastened with a nut below the mounting plate 5, so as to perform a mechanical fixing function. The material of the shaft sleeve 2 is selected to meet the requirement of the installation moment. When the outer insulating flange 203 is fastened to the mounting plate 5 through the mounting hole 204, the seal ring 205 at one end of the outer insulating flange 203 can be tightly fitted to the mounting plate 5, and the converter case is sealed by the seal ring 205.
The through-wall terminal for high-voltage electric connection can be applied to a new eight-shaft locomotive converter, is installed in the converter as shown in fig. 6, and is specifically installed at the external interface of the input, output and intermediate direct-current loop of the converter, so that the function of high-voltage electric connection between the inside and the outside of the converter in a sealed design is realized. Because the copper bar 3 and the internal thread hole 101 are passed through by the bolt between the converter internal circuit and the copper bar connecting part 102 for circuit connection, because the copper bar 3 has another fixed point in the converter, the principle of determining a straight line according to two points does not have the risk of rotation loosening caused by single-point fixation. The insulator 201 penetrates through the mounting plate 5 of the converter box body, bolts penetrate through the mounting holes 204 in the insulating outer flange 203 and the mounting plate 5 and are fastened with nuts below the mounting plate 5, the sealing ring 205 at one end of the insulating outer flange 203 can be tightly matched with the mounting plate 5 during fastening, and sealing with the converter box body is achieved through the sealing ring 205. The cable connection portion 103 is electrically connected to the lower cable 4 through the cable connection hole 104.
The embodiment further provides a specific implementation manner of the copper bar connecting portion 102, that is, the copper bar connecting portion 102 is a cylindrical structure, the internal threaded hole 101 is located on one end face thereof, and the cable connecting portion 103 is located on the other end face.
For the convenience of processing, the anti-falling groove 105 is located around the copper bar connecting portion 102, and the anti-falling groove 105 is arranged along the circumference of the copper bar connecting portion 102.
In order to further realize the rotation prevention between the copper conductor 1 and the shaft sleeve 2, the insulating block 201 extends to the cable connecting part 103, and the cable connecting part 103 is in limit fit with the insulating block 201. Specifically, the cable connection portion 103 adopts another structure other than a cylinder, so that the rotation between the cable connection portion 103 and the shaft sleeve 2 along the center line can be effectively avoided.
As shown in fig. 3, the present embodiment further provides a specific embodiment of the spacing fit between the cable connecting portion 103 and the insulating block 201, that is, the cable connecting portion 103 is a flat rod structure. After the shaft sleeve 2 is cast, the cable connecting part 103 is of a flat rod structure, so that relative rotation between the two parts can be effectively avoided.
Specifically, the insulation block 201 is a cylindrical structure.
As shown in fig. 3 and 4, the outer edge of the external insulation flange 203 is quadrilateral, and the number of the mounting holes 204 on the external insulation flange 203 is four, and the four mounting holes are respectively located at four corners of the quadrilateral. The stable connection between the shaft sleeve 2 and the mounting plate 3 can be effectively realized through the four mounting holes 204.
As shown in fig. 5, the external insulation flange 203 is located in the middle of the insulation block 201.
Further, the copper bar connecting part 102 and the cable connecting part 103 in the copper conductor 1 are both made of red copper materials. Specifically, the copper conductor 1 is a copper bar T2Y, and the raw materials conform to the standards GB/T5231-2001 and GB/T4423-2007. The copper conductor 1 is connected with the copper bar 3 or the cable 4 outside the cabinet, can bear the moment of 62 N.m, the copper bar is not deformed, and the copper conductor 1 and the shaft sleeve 2 are not rotated or loosened.
Further, the insulating block 201, the insulating inner flange 202 and the insulating outer flange 203 in the shaft sleeve 2 are all made of unsaturated polyester glass fiber reinforced plastic. Specifically, the shaft sleeve 2 is made of unsaturated polyester glass fiber reinforced molding compound, and the raw material meets the standard JB/T7770-1995. The outer insulating flange 203 is mounted on the mounting plate 5 in the current transformer by using M6 bolts, the mounting part of the outer insulating flange 203 can bear the moment of 12 N.m, and the insulating material of the shaft sleeve does not crack and is not damaged mechanically.
When the copper conductor 1 adopts a red copper bar T2Y and the shaft sleeve 2 adopts unsaturated polyester glass fiber reinforced molding compound, the technical conditions which can be achieved are rated voltage AC 3000V, rated current AC 1700A and dielectric strength test AC 10kV 50Hz 1 min; the environment conditions which can be adapted to are that the altitude is less than or equal to 2500m, the working environment temperature is-40 ℃ to +70 ℃, the storage temperature is-40 ℃ to +70 ℃, the relative humidity is not more than 95% (the average minimum temperature in the month is 25 ℃), the pollution level PD2, the overvoltage level OV2, and the impact and vibration GB/T21563 and 20181 class B.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. A wall-through terminal for high-voltage electric connection is characterized by comprising a copper conductor (1) and a shaft sleeve (2);
the copper conductor (1) comprises a copper bar connecting part (102) with an internal threaded hole (101) at one end, a cable connecting part (103) is arranged at the other end of the copper bar connecting part (102) opposite to the internal threaded hole (101), an anti-drop groove (105) is formed in the copper bar connecting part (102), and at least one cable connecting hole (104) is formed in the cable connecting part (103);
the shaft sleeve (2) comprises an insulating block (201) coated on the outer surface of the copper bar connecting portion (102), one end face of an inner threaded hole (101) of the copper bar connecting portion (102) extends out of the insulating block (201), an insulating inner flange (202) matched with the anti-falling groove (105) in a stop position is arranged inside the insulating block (201), an insulating outer flange (203) is arranged outside the insulating block (201), at least one mounting hole (204) is formed in the insulating outer flange (203), and a sealing ring (205) is arranged in the circumferential direction of one end, close to the cable connecting portion (103), of the insulating outer flange (203).
2. The wall-through terminal for high-voltage electrical connection according to claim 1, wherein the copper bar connecting portion (102) is a cylindrical structure, the internal threaded hole (101) is located on one end face, and the cable connecting portion (103) is located on the other end face.
3. The through-wall terminal for high-voltage electrical connection according to claim 2, wherein the anti-drop groove (105) is located around the copper bar connecting portion (102), and the anti-drop groove (105) is circumferentially arranged around the copper bar connecting portion (102).
4. The wall-through terminal for high-voltage electrical connection according to claim 1, wherein the insulation block (201) extends to the cable connection portion (103), and the cable connection portion (103) and the insulation block (201) are in limited fit.
5. A through-wall terminal for high-voltage electrical connection according to claim 4, characterized in that the cable connection part (103) is a flat bar structure.
6. A through-wall terminal for high-voltage electrical connection according to claim 1, characterized in that the insulating block (201) is of a cylindrical structure.
7. The through-wall terminal for high-voltage electrical connection as claimed in claim 1, wherein the outer edge of the external insulation flange (203) is quadrilateral, and the number of the mounting holes (204) on the external insulation flange (203) is four, and the four mounting holes are respectively located at four corners of the quadrilateral.
8. A through-wall terminal for high-voltage electrical connection according to claim 1, characterized in that the external insulating flange (203) is located in the middle of the insulating block (201).
9. The through-wall terminal for high-voltage electrical connection according to any one of claims 1 to 8, wherein the copper bar connecting part (102) and the cable connecting part (103) of the copper conductor (1) are made of red copper.
10. A through-wall terminal for high-voltage electrical connection according to any of claims 1 to 8, characterized in that the insulating block (201), the inner insulating flange (202) and the outer insulating flange (203) of the bushing (2) are made of unsaturated polyester glass fiber reinforced plastic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122950084.3U CN216750395U (en) | 2021-11-29 | 2021-11-29 | High-voltage electric connection through-wall terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122950084.3U CN216750395U (en) | 2021-11-29 | 2021-11-29 | High-voltage electric connection through-wall terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216750395U true CN216750395U (en) | 2022-06-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122950084.3U Active CN216750395U (en) | 2021-11-29 | 2021-11-29 | High-voltage electric connection through-wall terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216750395U (en) |
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2021
- 2021-11-29 CN CN202122950084.3U patent/CN216750395U/en active Active
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