CN213242144U - Sealing structure of secondary end of current transformer - Google Patents
Sealing structure of secondary end of current transformer Download PDFInfo
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- CN213242144U CN213242144U CN202022472049.0U CN202022472049U CN213242144U CN 213242144 U CN213242144 U CN 213242144U CN 202022472049 U CN202022472049 U CN 202022472049U CN 213242144 U CN213242144 U CN 213242144U
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- cable head
- current transformer
- waterproof cable
- junction box
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Abstract
The utility model discloses a seal structure of current transformer secondary, become an organic whole through the epoxy pouring including secondary terminal box and the current transformer pouring body, be equipped with the draw-in groove at the tip of secondary terminal box, install secondary silica gel pad in this draw-in groove, the pressfitting has stainless steel secondary apron above the secondary silica gel pad, through stainless steel secondary apron screw with secondary silica gel pad, stainless steel secondary apron be fixed in on the secondary terminal box, one side of secondary terminal box is connected with the waterproof cable head, has placed the silicon rubber sealing washer between waterproof cable head and secondary terminal box, external cable passes the secondary binding post in waterproof cable head and the secondary terminal box and links to each other. A sealed space is formed by the secondary wiring end of the current transformer, so that water seepage is effectively prevented, the phenomenon of electricity stealing is easily caused, and the effects of isolation and sealing are achieved; therefore, the service life of the product is prolonged, the times of maintenance are reduced, and the purpose of reducing the cost is achieved.
Description
Technical Field
The utility model relates to a protection seal structure, concretely relates to seal structure of current transformer secondary.
Background
The open-close type current transformer special for the existing motor car has the common defects of water seepage and easy electricity stealing, and can not be effectively solved all the time, and the secondary wiring cable is a hidden trouble point which is easy to generate electricity stealing and water seepage, so that the structural form of the secondary end of the product needs to be further improved according to the requirements of product intensification, electricity stealing prevention, water prevention and the like.
SUMMERY OF THE UTILITY MODEL
The utility model provides a seal structure of current transformer secondary end, its life who improves the product reduces the number of times of maintaining the maintenance, reaches reduce cost's purpose to the special open-close type current transformer of motor car existence secondary end infiltration and easily steal the electric problem.
In order to achieve the purpose, the technical scheme of the application is as follows: a sealing structure of a secondary end of a current transformer comprises an external cable, a current transformer casting body, a secondary junction box, a secondary wiring terminal, a secondary silica gel pad, a stainless steel secondary cover plate screw, a waterproof cable head and a silicon rubber sealing ring, wherein the secondary junction box and the current transformer casting body are cast into a whole through epoxy resin, a clamping groove is arranged at the end part of the secondary junction box, a secondary silica gel pad is arranged in the clamping groove, a stainless steel secondary cover plate is pressed on the secondary silica gel pad, the secondary silica gel pad and the stainless steel secondary cover plate are fixed on the secondary junction box through stainless steel secondary cover plate screws, one side of the secondary junction box is connected with a waterproof cable head, the silicone rubber sealing ring is placed between the waterproof cable head and the secondary junction box, and the external cable penetrates through the waterproof cable head to be connected with a secondary wiring terminal in the secondary junction box.
Furthermore, the secondary junction box is formed by pouring epoxy resin on the current transformer pouring body.
Further, the waterproof cable head is embedded into threads at the opening of the secondary junction box in a rotating mode.
Furthermore, the silicone rubber sealing ring is pressed by the two ends of the waterproof cable head and the secondary junction box at the same time, and is extruded and deformed to seal a gap between the waterproof cable head and the secondary junction box.
Furthermore, the white steel nut on the waterproof cable head is rotated to extrude the silicon rubber sealing tube in the waterproof cable head, so that the inner wall of the silicon rubber sealing tube tightly presses the outer wall of the external cable, and the external cable and the waterproof cable head are sealed.
Further, the secondary wiring terminal is fastened in the secondary wiring box through a screw.
Furthermore, the joint of the stainless steel secondary cover plate screw and the stainless steel secondary cover plate adopts red paint as a locking mark a, the contact part of the waterproof cable head and the secondary junction box adopts red paint as a locking mark b, and the screwing part of the white steel nut on the waterproof cable head and the waterproof cable head adopts red paint as a locking mark b.
Furthermore, the anti-loose mark a is a cross symbol, and the anti-loose mark b is a straight symbol.
Furthermore, the screw thread fastening torque values of the stainless steel secondary cover plate screw and the stainless steel secondary cover plate, the waterproof cable head and the secondary junction box, and the white steel nut on the waterproof cable head and the waterproof cable head are 3-3.5 N.m.
The utility model discloses owing to adopt above technical scheme, can gain following technological effect:
1. compact structure, preparation convenience: the secondary junction box is directly poured on the current transformer pouring body, so that the structure of the secondary junction box is optimized, the structure is not influenced, and meanwhile, the integral structure of the transformer pouring body and the secondary junction box is utilized, the purposes of compact structure, firmness and stability in sealing are achieved, the manufacturing is simple and rapid, and the production efficiency is effectively improved.
2. Ageing resistance, water resistance are strong, and it is insulating reliable: the secondary terminal box is formed by pouring epoxy resin, the epoxy resin is an excellent electrical insulating material, the secondary silica gel pad is passed through, the stainless steel secondary cover plate and the stainless steel secondary cover plate screw are sealed by the waterproof cable head and the external cable to form a sealed space, rainwater infiltration is effectively prevented, and the sealed secondary wiring end structure can avoid the performance degradation phenomenon in the normal use process and ensure that the product performance is more stable and reliable.
3. Isolation and sealing functions: when an external cable is inserted into the waterproof cable head, a sealed space is formed by the secondary wiring end of the current transformer, so that water seepage is effectively prevented, the phenomenon of electricity stealing is easily caused, and the effects of isolation and sealing are achieved; therefore, the service life of the product is prolonged, the times of maintenance are reduced, and the purpose of reducing the cost is achieved.
Drawings
FIG. 1 is a front view of a sealing structure of a secondary side of a current transformer;
FIG. 2 is a side view of a seal configuration for the secondary side of a current transformer;
the sequence numbers in the figures illustrate: 1 is an external cable; 2, casting a current transformer; 3 is a secondary junction box; 4 is a secondary wiring terminal; 5 is a secondary silica gel pad; 6 is a stainless steel secondary cover plate; 7 is a stainless steel secondary cover plate screw; 8 is a waterproof cable head, 9 is a silicon rubber sealing tube, and 10 is a silicon rubber sealing ring.
Detailed Description
The invention will be described in further detail with reference to the following figures and specific embodiments: the present application is further described by taking this as an example.
Example 1
The utility model provides a pair of seal structure of current transformer secondary end is the new product that designs according to national standard completely, utilize the secondary terminal box of pouring together with current transformer, through secondary silica gel pad, stainless steel secondary cover plate screw, waterproof cable head and external cable, form a waterproof seal structure of current transformer secondary end, thereby optimize secondary terminal structure, the effectual infiltration that prevents, the phenomenon of easily stealing the electricity, reach the isolation, sealed effect, guarantee that the performance degradation phenomenon can not appear in long-term use, guarantee that product property ability is more reliable and more stable.
As shown in fig. 1-2, a sealing structure of a secondary end of a current transformer comprises an external cable, a current transformer casting body, a secondary junction box, a secondary wiring terminal, a secondary silica gel pad, a stainless steel secondary cover plate screw, a waterproof cable head, a silicon rubber sealing tube and a silicon rubber sealing ring, wherein the secondary junction box is formed by pouring epoxy resin on a pouring body of the current transformer, the current transformer and the pouring body form an integral structure, a clamping groove is arranged at the end part of the secondary junction box, a secondary silica gel pad is arranged in the clamping groove, a stainless steel secondary cover plate is pressed on the secondary silica gel pad, the secondary silica gel pad and the stainless steel secondary cover plate are fixed on the secondary junction box through stainless steel secondary cover plate screws, one side of the secondary junction box is connected with a waterproof cable head which is embedded into threads at the opening of the secondary junction box in a rotating mode; a silicone rubber sealing ring is arranged between the waterproof cable head and the secondary junction box, and the silicone rubber sealing ring is extruded and deformed under the pressure of the two ends of the waterproof cable head and the two ends of the secondary junction box simultaneously so as to seal the gap between the waterproof cable head and the secondary junction box; the external cable penetrates through the waterproof cable head to be connected with a secondary wiring terminal in the secondary wiring box, and the secondary wiring terminal is fastened in the secondary wiring box through a screw; the white steel nut on the waterproof cable head is rotated to extrude the silicone rubber sealing tube in the waterproof cable head, so that the inner wall of the silicone rubber sealing tube tightly presses the outer wall of the external cable, and the external cable and the waterproof cable head are sealed. Thus, a complete waterproof sealing structure of the secondary end of the current transformer is formed.
In order to enable the sealing position to be loosened and found in time, the joint of the stainless steel secondary cover plate screw and the stainless steel secondary cover plate adopts red paint to be anti-loosening mark a, the contact position of the waterproof cable head and the secondary junction box adopts red paint to be anti-loosening mark b, the screwing position of the white steel nut on the waterproof cable head and the waterproof cable head adopts red paint to be anti-loosening mark b, the anti-loosening mark a is a cross symbol, and the anti-loosening mark b is a straight symbol.
The screw thread fastening torque values of the stainless steel secondary cover plate screw and the stainless steel secondary cover plate, the waterproof cable head and the secondary junction box, and the white steel nut on the waterproof cable head and the waterproof cable head are 3-3.5N.m, the elastic performance of the secondary silica gel pad, the silicone rubber sealing ring and the silicone rubber sealing tube is fully utilized, and the sealing is more reliable.
The sealing structure has the advantages of stable insulation, moisture and water resistance, maintenance free, small volume, simple structure, full sealing, and greatly improved power supply reliability, can be widely applied to current transformers for electric locomotives or motor cars of various types, and realizes electrical programming, standardization and localization of a train electrical system.
The embodiment also provides a method for sealing the secondary end of the current transformer, which comprises the following specific steps:
s1, a secondary junction box is poured on a current transformer pouring body through epoxy resin, and the secondary junction box and the current transformer pouring body are of an integrated structure, so that the structure of a secondary wiring end is optimized, and the effects of compact and sealed structure, firmness and stability, simple and rapid manufacture and production efficiency improvement are achieved on the premise of not influencing the structure.
S2, placing a secondary silica gel pad in a clamping groove of the secondary junction box to play a role in sealing the secondary junction box, pressing a stainless steel secondary cover plate on the secondary silica gel pad, and fixing the secondary silica gel pad and the stainless steel secondary cover plate on the secondary junction box by using 4 stainless steel secondary cover plate screws, wherein the thread fastening torque value is preferably 3-3.5 N.m; and a joint of the stainless steel secondary cover plate screw and the stainless steel secondary cover plate is provided with a locking mark a by red paint, and the locking mark a can be a cross symbol.
S3, embedding the waterproof cable head into a thread at the opening of the side face of the secondary junction box in a rotating mode, wherein the fastening torque value of the thread at the opening is preferably 3-3.5N.m, placing a silicon rubber sealing ring between the waterproof cable head and the secondary junction box, and extruding and deforming the silicon rubber sealing ring under the pressure of the two ends of the waterproof cable head and the two ends of the secondary junction box so as to seal the gap between the waterproof cable head and the secondary junction box; and a contact part of the waterproof cable head and the secondary junction box is provided with a locking mark b made of red paint, and the locking mark b can be a linear symbol.
S4, one end of the external cable penetrates through the waterproof cable head to be connected to a secondary wiring terminal in a secondary wiring box, a white steel nut on the upper portion of the waterproof cable head is rotated, the screw thread fastening torque value of the position is preferably 3-3.5N.m, a silicon rubber sealing tube in the waterproof cable head is extruded, the inner wall of the silicon rubber sealing tube tightly presses the outer wall of the external cable, and therefore sealing of the external cable and the waterproof cable head is achieved; and a red paint is adopted at the screwing position of the white steel nut and the waterproof cable head to make a locking mark b, and the locking mark b can be a linear symbol.
The sealing method can effectively prevent water seepage and easily avoid electricity stealing, and achieves the effects of isolation and sealing. Therefore, the service life of the product is prolonged, the times of maintenance are reduced, and the purpose of reducing the cost is achieved. The performance degradation phenomenon can be avoided in the long-term use process, and the product performance is more stable and reliable.
The above, only for the utility model discloses create the concrete implementation way of preferred, nevertheless the utility model discloses the protection scope of creation is not limited to this, and any person skilled in this technical field is in the utility model discloses create the technical scope of disclosure, according to the utility model discloses the technical scheme of creation and utility model design equivalence replacement or change all should be covered in the protection scope of creation of the utility model.
Claims (9)
1. A sealing structure of a secondary end of a current transformer is characterized by comprising an external cable, a current transformer pouring body, a secondary junction box, a secondary wiring terminal, a secondary silica gel pad, a stainless steel secondary cover plate screw, a waterproof cable head and a silicon rubber sealing ring, wherein the secondary junction box and the current transformer casting body are cast into a whole through epoxy resin, a clamping groove is arranged at the end part of the secondary junction box, a secondary silica gel pad is arranged in the clamping groove, a stainless steel secondary cover plate is pressed on the secondary silica gel pad, the secondary silica gel pad and the stainless steel secondary cover plate are fixed on the secondary junction box through stainless steel secondary cover plate screws, one side of the secondary junction box is connected with a waterproof cable head, the silicone rubber sealing ring is placed between the waterproof cable head and the secondary junction box, and the external cable penetrates through the waterproof cable head to be connected with a secondary wiring terminal in the secondary junction box.
2. The sealing structure of the secondary terminal of the current transformer according to claim 1, wherein the secondary junction box is molded on the current transformer molding body by epoxy resin.
3. The sealing structure of the secondary terminal of the current transformer according to claim 1, wherein the waterproof cable head is rotatably inserted into a thread at the opening of the secondary junction box.
4. The sealing structure of the secondary terminal of the current transformer according to claim 1, wherein the silicone rubber sealing ring is pressed by the two ends of the waterproof cable head and the secondary junction box, and is deformed by compression, thereby completing sealing of the gap between the waterproof cable head and the secondary junction box.
5. The sealing structure of the secondary terminal of the current transformer according to claim 1, wherein the silicone rubber sealing tube inside the waterproof cable head is pressed by rotating the white steel nut on the waterproof cable head, so that the inner wall of the silicone rubber sealing tube tightly presses the outer wall of the external cable, thereby forming a seal between the external cable and the waterproof cable head.
6. The sealing structure of the secondary terminal of the current transformer according to claim 1, wherein the secondary connection terminal is fastened in the secondary connection box by a screw.
7. The sealing structure of the secondary end of the current transformer according to claim 1, wherein a joint of the stainless steel secondary cover plate screw and the stainless steel secondary cover plate adopts red paint as a locking mark a, a contact of the waterproof cable head and the secondary junction box adopts red paint as a locking mark b, and a screwing part of the white steel nut on the waterproof cable head and the waterproof cable head adopts red paint as a locking mark b.
8. The sealing structure of the secondary terminal of the current transformer according to claim 7, wherein the anti-loose mark a is a cross symbol, and the anti-loose mark b is a straight symbol.
9. The sealing structure of the secondary end of the current transformer according to claim 1, wherein the screw thread fastening torque values of the stainless steel secondary cover plate screw and the stainless steel secondary cover plate, the waterproof cable head and the secondary junction box, and the white steel nut on the waterproof cable head and the waterproof cable head are 3-3.5 N.m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022472049.0U CN213242144U (en) | 2020-10-30 | 2020-10-30 | Sealing structure of secondary end of current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022472049.0U CN213242144U (en) | 2020-10-30 | 2020-10-30 | Sealing structure of secondary end of current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213242144U true CN213242144U (en) | 2021-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022472049.0U Active CN213242144U (en) | 2020-10-30 | 2020-10-30 | Sealing structure of secondary end of current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213242144U (en) |
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2020
- 2020-10-30 CN CN202022472049.0U patent/CN213242144U/en active Active
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