CN210224915U - Cable interface sealing mechanism and underwater power transformer - Google Patents
Cable interface sealing mechanism and underwater power transformer Download PDFInfo
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- CN210224915U CN210224915U CN201921541410.1U CN201921541410U CN210224915U CN 210224915 U CN210224915 U CN 210224915U CN 201921541410 U CN201921541410 U CN 201921541410U CN 210224915 U CN210224915 U CN 210224915U
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Abstract
The utility model discloses a cable interface sealing mechanism, including cable business turn over pipe, flexible toper cover, locking clamping ring and locking bolt, fixed connection is imported and exported with the box to cable business turn over pipe, the outer end inboard of cable business turn over pipe sets up into toper flaring structure, cylindrical through-hole is set to flexible toper cover inboard, the toper that matches with toper flaring structure is set to its outside, and flexible toper cover axial length will be greater than toper flaring structure axial length, the locking bolt passes through the bolt through-hole on the locking clamping ring and the outer terminal surface fixed connection of cable business turn over pipe, then flexible toper cover is under the locking bolt effect, it is sealed to compress tightly to form by the locking clamping ring between cable business turn over pipe and cable. And a self-plastic sealing layer is arranged between the flexible conical sleeve and the cable. An underwater power transformer using the sealing mechanism is also disclosed. The utility model discloses can realize the good sealed of cable and box, provide reliable guarantee for really reaching to soak in the underwater power transformer of safe operation for a long time.
Description
Technical Field
The utility model relates to a power assembly technical field especially relates to a cable interface sealing mechanism and power transformer under water.
Background
The 10/0.4kV power transformer is an essential important device in a power distribution system, and the operational reliability of the power transformer directly influences the safety of the power distribution system. Rainy climate and typhoon disaster in coastal areas and south of China often bring huge loss to distribution networks and large-scale power transformers.
In recent years, the concept of an underground transformer is provided by power grid transformation so as to reduce the influence of weather, but the product can only simply prevent water and water for a short time at present, cannot solve the problem that the transformer runs underwater for a long time, and cannot tolerate long-time immersion of flood. The existing underground transformer needs to be placed in a closed pit for solving the problem of transformer water immersion, and accumulated water in the pit needs to be discharged uninterruptedly by means of a water pump. However, in actual operation, when the power grid is powered off due to various reasons, the water pump cannot work, and the transformer is flooded by water for a long time and is damaged. According to statistics, a considerable part of the huge transformer capacity in China is used for replacing damaged transformers every year, and the economic loss is huge.
It is seen that the above-mentioned conventional underground power transformer still has the inconvenience and drawbacks, and further improvement is needed. How to create a new cable interface sealing mechanism and an underwater power transformer, the waterproof performance of the cable interface sealing mechanism is good, the purpose of long-term underwater operation of the transformer is really realized, and the cable interface sealing mechanism becomes an object which is greatly required to be improved in the current industry.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a cable interface sealing mechanism makes its waterproof performance good, for realizing that the transformer provides reliable assurance at long-term operation under water to overcome current secret power transformer's not enough.
In order to solve the technical problem, the utility model provides a cable interface sealing mechanism for realize the sealed of cable and box business turn over mouth department, pass in and out pipe, flexible toper cover, locking clamping ring and locking bolt including the cable.
The cable inlet and outlet pipe is fixedly connected with the inlet and outlet of the box body, the inner side of the outer end of the cable inlet and outlet pipe is provided with a conical flaring structure, the inner side of the flexible conical sleeve is provided with a cylindrical through hole, the outer side of the flexible conical sleeve is provided with a cone matched with the conical flaring structure, the axial length of the flexible conical sleeve is larger than that of the conical flaring structure, the flexible conical sleeve and the locking compression ring are sleeved on the cable, the flexible conical sleeve is positioned at the conical flaring structure, the locking press ring is positioned at the outer side of the flexible conical sleeve, the locking bolt is fixedly connected with the outer end face of the cable inlet and outlet conduit through a bolt through hole on the locking press ring, the flexible conical sleeve is tightly pressed between the cable inlet and outlet guide pipe and the cable by the locking press ring under the action of the locking bolt to form sealing.
In further improvement, the bottom of the conical flaring structure is provided with a counter bore platform.
In a further improvement, a check ring is arranged at the counter bore platform.
In a further improvement, the flexible conical sleeve is a deformable sealing sleeve made of silicon rubber.
In a further improvement, the shore hardness of the flexible conical sleeve is 45 degrees.
In a further improvement, the cable further comprises a self-plastic sealing layer arranged between the flexible conical sleeve and the cable.
The self-plastic sealing layer is made of a strong-tensile self-adhesive interactive rubber material.
The improvement is further that at least 3 evenly distributed bolt through holes are formed in the locking compression ring.
The improvement is further realized, the locking clamping ring is in under the fastening of locking bolt, the locking clamping ring with the gap between cable business turn over pipe outer end face is 2 ~ 5mm, and is more preferred 3 mm.
The utility model also provides an underwater power transformer, including box and business turn over the cable of box, the cable adopts foretell cable interface sealing mechanism with the sealed of box business turn over mouth department.
After adopting such design, the utility model discloses following advantage has at least:
1. the utility model discloses a set up deformable flexible toper cover to and rather than supporting cable business turn over pipe, locking clamping ring and the locking bolt of using area toper flaring structure, this wedge seal structure is simple, with low costs, can realize the good sealed effect of cable and box business turn over mouth department.
2. Still through setting up from moulding the sealing layer, because from moulding the strong drawing self-adhesion type interact of sealing layer, can realize this from moulding the sealing layer and cable outward appearance and the inboard chemical integration between the flexible toper cover, better realization cable and the sealed between the flexible toper cover, further promotion cable interface seals the effect, realizes really sealed the guarantee that provides reliable for cable interface under water.
3. And by arranging the counter bore platform and the metal check ring, the flexible taper sleeve can be ensured to be filled between the cable inlet and outlet guide pipe and the cable as far as possible, and the flexible taper sleeve is prevented from being extruded without limit.
4. Still be 2 ~ 5mm through setting for the gap between locking clamping ring and the cable business turn over pipe outer end face, can play the airtight rat bite-proof effect of metal, provide reliable assurance for power transformer is used for the underground.
5. The utility model discloses power transformer is through adopting this application modified cable interface sealing mechanism under water, can be good realize the cable and the sealing between the power transformer box under water, guarantee the waterproof function of box, reach real can soak in the underwater power transformer of safe operation under water for a long time, thoroughly solve the national difficult problem under china's coast and the south rainy weather.
Drawings
The foregoing is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clear, the present invention will be further described in detail with reference to the accompanying drawings and the detailed description.
Fig. 1 is a schematic structural diagram of a use state of the cable interface sealing mechanism of the present invention.
Fig. 2 is a schematic structural diagram of the flexible tapered sleeve in the cable interface sealing mechanism of the present invention.
Detailed Description
Referring to fig. 1 and 2, the cable interface sealing mechanism of the present embodiment is used for sealing the inlet and the outlet of the cable 1 and the transformer tank 2, and includes a cable inlet and outlet conduit 3, a flexible conical sleeve 4, a locking compression ring 5, and a locking bolt 6.
The cable inlet and outlet conduit 3 is fixedly connected with the inlet and outlet of the box body 2, and the joint of the cable inlet and outlet conduit 3 and the box body 2 is arranged in a right-angle step shape, so that the contact area between the outer wall of the conduit and the inlet and outlet edges of the box body is increased, and the airtightness is improved. In this embodiment, the cable inlet and outlet conduit 3 is made of stainless steel pipe and is fixedly connected with the inlet and outlet of the box body 2 made of weather-resistant steel plates by welding. The inner side of the outer end of the cable inlet and outlet conduit 3 is provided with a conical flaring structure. A plurality of bolt fixing holes are arranged on the outer end face of the cable inlet and outlet guide pipe 3.
The inner side of the flexible conical sleeve 4 is provided with a cylindrical through hole, the outer side of the flexible conical sleeve is provided with a cone matched with the conical flaring structure, and the axial length of the flexible conical sleeve 4 is larger than that of the conical flaring structure. The flexible conical sleeve 4 is a deformable sealing sleeve made of silicon rubber. The Shore hardness of the flexible conical sleeve 4 is 45 degrees, and the flexible conical sleeve also has flame-retardant and explosion-proof functions.
The locking clamping ring 5 is a stainless steel clamping ring, and a plurality of bolt through holes corresponding to the bolt fixing holes on the outer end face of the cable inlet and outlet conduit 3 are formed in the stainless steel clamping ring. In this embodiment, the locking compression ring 5 is provided with 4 bolt through holes which are uniformly distributed.
The locking bolt 6 is a high-strength stainless steel bolt.
During the use, this flexible taper sleeve 4 and locking clamping ring 5 are all established on cable 1, this flexible taper sleeve 4 is located this toper flaring structure department, this locking clamping ring 5 is located the outside of this flexible taper sleeve 4, this locking bolt 6 is connected with the bolt fastening hole on this cable business turn over pipe 3 outer terminal surface through the bolt through-hole on this locking clamping ring 5, realize fixing locking clamping ring 5 on cable business turn over pipe 3, compress tightly flexible taper sleeve 4 between cable business turn over pipe 3 and cable 1 simultaneously, form good sealed.
In a preferred embodiment, the bottom of the conical flaring structure is provided with a counter bore platform. The counter bore platform is provided with a metal retainer ring 7, which can ensure the filling of the flexible conical sleeve 4 between the cable inlet and outlet conduit 3 and the cable 1 as much as possible and prevent the flexible conical sleeve from being extruded without limit.
In a preferred embodiment, the cable interface sealing mechanism further comprises a self-plastic sealing layer 8 disposed between the flexible cone-shaped sleeve 4 and the cable 1.
In this embodiment, the self-plastic sealing layer 8 is made of a strong-tensile self-adhesive interactive rubber material. This mutual rubber material of strong tensile self-adhesion type when using, through tensile parcel in cable 1 and the corresponding position department of flexible taper sleeve 4, realizes the fusion reaction of this mutual rubber material and cable sheath, accomplishes the flexible seal to the cable sheath, and the rethread is fixed in the inboard of flexible taper sleeve 4, fuses the reaction with the taper sleeve inner wall, forms not only waterproof but also good sealed effect of gas-tight.
The cable interface sealing mechanism can be used for sealing the cable of the underground power transformer and the inlet and outlet of the transformer box body, and the underground power transformer can achieve the function of long-term soaking underwater safe operation by the good sealing effect, so that the use target of the underwater power transformer is really realized.
In addition, the underwater power transformer adopts the mode of installing a plurality of cables in parallel, so that each cable is arranged in the independent closed inlet and outlet guide pipe, and waterproof and airtight sealing is independently realized, thus the technical effect of blocking the cable accident spreading can be achieved.
The box body of the underwater power transformer is made of weather-resistant steel for water-resistant anti-corrosion treatment, and the effect that the service life of the underwater power transformer is not less than 30 years can be achieved.
In order to meet the cable sealing requirements of different diameters, the cable interface sealing mechanism is provided with cable inlet and outlet guide pipes 3 of different specifications, a flexible conical sleeve 4, a metal retainer ring 7 and a locking compression ring 5. The matching among the above parts should all reach: the locking clamping ring 5 is fastened by the locking bolt 6, and the gap between the locking clamping ring 5 and the outer end face of the cable inlet and outlet conduit 3 is 2-5 mm, preferably 3 mm. The structure can form a metal sealing rat-proof function, and the safety of the power transformer is further improved.
Of course, the cable interface sealing mechanism can also be used for other equipment needing cable sealing, and has the advantages of simple structure, low cost, good sealing effect and wide application.
Through calculation and demonstration, the underwater power transformer adopting the cable interface sealing mechanism can resist 10-meter water pressure, can block various dangerous conditions such as explosion, dust and various pollution, has the functions of flame retardance and rat bite prevention, completely meets the requirement of long-term underwater operation of the transformer, and meets the urgent market demand of the state.
The above description is only for the preferred embodiment of the present invention, and not intended to limit the present invention in any way, and those skilled in the art can make various modifications, equivalent changes and modifications using the above-described technical content, all of which fall within the scope of the present invention.
Claims (10)
1. A cable interface sealing mechanism is used for realizing the sealing of an inlet and an outlet of a cable and a box body and is characterized by comprising a cable inlet and outlet guide pipe, a flexible conical sleeve, a locking press ring and a locking bolt,
the cable inlet and outlet pipe is fixedly connected with the inlet and outlet of the box body, the inner side of the outer end of the cable inlet and outlet pipe is provided with a conical flaring structure, the inner side of the flexible conical sleeve is provided with a cylindrical through hole, the outer side of the flexible conical sleeve is provided with a cone matched with the conical flaring structure, the axial length of the flexible conical sleeve is larger than that of the conical flaring structure, the flexible conical sleeve and the locking compression ring are sleeved on the cable, the flexible conical sleeve is positioned at the conical flaring structure, the locking press ring is positioned at the outer side of the flexible conical sleeve, the locking bolt is fixedly connected with the outer end face of the cable inlet and outlet conduit through a bolt through hole on the locking press ring, the flexible conical sleeve is tightly pressed between the cable inlet and outlet guide pipe and the cable by the locking press ring under the action of the locking bolt to form sealing.
2. The cable interface seal mechanism of claim 1, wherein a counter bore platform is provided at a bottom of the conically flared structure.
3. The cable interface seal mechanism of claim 2, wherein a retaining ring is disposed at the counterbore platform.
4. The cable port seal mechanism of claim 1 wherein said flexible tapered sleeve is a deformable boot seal made of silicone rubber.
5. The cable interface sealing mechanism of claim 4, wherein the flexible tapered sleeve has a shore hardness of 45 degrees.
6. The cable interface seal mechanism of any one of claims 1 to 5, further comprising a self-molding seal layer disposed between the flexible tapered sleeve and the cable.
7. The cable interface sealing mechanism of claim 6, wherein the self-molding sealing layer is made of a strong tensile self-adhesive interactive rubber material.
8. The cable port sealing mechanism of claim 1, wherein the locking collar has at least 3 evenly distributed bolt through holes.
9. The cable interface sealing mechanism according to claim 1, wherein the locking press ring is fastened by the locking bolt, and a gap between the locking press ring and the outer end face of the cable inlet/outlet conduit is 2-5 mm.
10. An underwater power transformer comprising a box body and a cable entering and exiting the box body, wherein the cable and the inlet and outlet of the box body are sealed by the cable interface sealing mechanism of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921541410.1U CN210224915U (en) | 2019-09-17 | 2019-09-17 | Cable interface sealing mechanism and underwater power transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921541410.1U CN210224915U (en) | 2019-09-17 | 2019-09-17 | Cable interface sealing mechanism and underwater power transformer |
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| CN210224915U true CN210224915U (en) | 2020-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921541410.1U Active CN210224915U (en) | 2019-09-17 | 2019-09-17 | Cable interface sealing mechanism and underwater power transformer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10845542B1 (en) | 2019-08-19 | 2020-11-24 | Afl Telecommunications Llc | Cable node transition assemblies |
| CN114614434A (en) * | 2022-01-27 | 2022-06-10 | 北京航天发射技术研究所 | Cable leading-out waterproof sealing device and method based on high-pressure underwater environment test |
-
2019
- 2019-09-17 CN CN201921541410.1U patent/CN210224915U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10845542B1 (en) | 2019-08-19 | 2020-11-24 | Afl Telecommunications Llc | Cable node transition assemblies |
| CN114614434A (en) * | 2022-01-27 | 2022-06-10 | 北京航天发射技术研究所 | Cable leading-out waterproof sealing device and method based on high-pressure underwater environment test |
| CN114614434B (en) * | 2022-01-27 | 2024-03-05 | 北京航天发射技术研究所 | Waterproof sealing device and method for leading-out of environment test cable based on high-pressure water |
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