CN210769890U - Flange butt joint structure and insulating pillar - Google Patents
Flange butt joint structure and insulating pillar Download PDFInfo
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- CN210769890U CN210769890U CN201921424113.9U CN201921424113U CN210769890U CN 210769890 U CN210769890 U CN 210769890U CN 201921424113 U CN201921424113 U CN 201921424113U CN 210769890 U CN210769890 U CN 210769890U
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Abstract
The utility model discloses a flange butt joint structure, which comprises a first flange and a second flange, wherein the first flange and the second flange are fixedly connected by bolts, and sealing objects are coated at the two ends of the bolts; on the ring flange of butt joint department, be first region, second region, third region in proper order from inside to outside along the radial of ring flange, in first region, first flange and second flange laminating are equipped with the sealing washer between and, and in the second region, first flange and second flange set up the through-hole that corresponds, and the bolt passes the through-hole, and the third region holds supplementary sheath, the laminating of internal surface, upper surface and the lower surface and the third region of supplementary sheath. The two ends of the bolt are coated with sealing objects for sealing, so that the bolt and the nut are not contacted with air and are prevented from being corroded; the auxiliary sheath can prevent water vapor from invading from the butt joint surface of the flange, isolate the water vapor permeation channel and improve the whole sealing property and the corrosion resistance of the flange butt joint structure. The utility model discloses still disclose an adopt above-mentioned flange butt joint structure's insulating pillar.
Description
Technical Field
The utility model relates to a transmission of electricity insulating apparatus specifically is a flange butt joint structure and insulating pillar.
Background
At present, the hollow insulator is widely applied to the power industry. When the flanges of the insulating support columns connected by the hollow insulators are butted, a common sealing method is to mount a sealing ring on the butting surface of the flanges or adopt a sealing structure added with an adhesive. The connection between the flange adopts bolt and nut's connection fixed mode, and bolt, nut even sealing washer expose in the air, and long-term so can lead to the interface rust corrosion of above-mentioned part and flange, especially in coastal area corrosion rate faster, finally lead to sealing performance bad, and steam gets into from the flange interface, corrodes the sealing washer, leads to the phenomenon of product gas leakage, influences inside electrical equipment's normal operating.
SUMMERY OF THE UTILITY MODEL
To the deficiency of the prior art, one of the purposes of the utility model is to provide a flange butt joint structure, this flange butt joint structure bolt both ends cladding sealing object seals, makes bolt and nut not and then avoid corroding with air direct contact. The auxiliary sheath can prevent water vapor from invading from the butt joint surface of the flange, isolate the water vapor permeation channel and improve the whole sealing property and the corrosion resistance of the flange butt joint structure.
In order to realize the purpose of the utility model, the utility model adopts the following technical means: a flange butt joint structure comprises a first flange and a second flange, wherein the first flange and the second flange are fixedly connected by bolts, and sealing objects are coated at two ends of the bolts; on the ring flange of butt joint department, be first region, second region, third region in proper order from inside to outside along the radial of ring flange, in first region, first flange and second flange laminating are equipped with the sealing washer between and, and in the second region, first flange and second flange set up the through-hole that corresponds, and the bolt passes the through-hole, and the third region holds supplementary sheath, the laminating of internal surface, upper surface and the lower surface and the third region of supplementary sheath.
Preferably, the upper surface and/or the lower surface of the auxiliary sheath is provided with protrusions. The fixed relation of auxiliary sheath and flange has been strengthened to bellied setting, makes the contact surface of auxiliary sheath and flange laminate more. The form of the protrusion is not limited, and may be square or spherical, and other shapes. Because the auxiliary sheath is completely attached to the third area of the flange, the first flange and the second flange are designed to be in the same matching mode according to the protruding mode of the auxiliary sheath so as to achieve the attaching effect.
Preferably, the auxiliary sheath is provided with an opening, a first connecting portion and a second connecting portion which are matched with each other are arranged at two ends of the opening respectively, and when the first connecting portion is connected with the second connecting portion, the auxiliary sheath is closed in the circumferential direction of the flange plate. The opening design of the auxiliary sheath facilitates the installation of the auxiliary sheath and has convenience. The form of the first connection portion and the second connection portion may also take various connection forms, such as glue joint and lap joint, and is not particularly limited as long as the auxiliary sheath can be closed in the circumferential direction of the flange.
Preferably, the auxiliary sheath is sealingly secured to the third region using an adhesive. The structure can ensure that the inner surface of the auxiliary sheath is better attached to the flange, and further improves the sealing property of the flange butt joint structure.
Preferably, the first region and the second region form a step therebetween, and the surface of the flange is provided with a protective coating in the second region and/or the third region. The step is formed between the first area and the second area so as to facilitate the arrangement of the protective coating of the second area; in the second area and/or the third area, the surface of the flange plate is provided with a protective coating, so that the self corrosion resistance of the flange can be enhanced, and a gap is prevented from being generated after the butt joint surface of the flange is corroded, so that water vapor invades into the insulator and influences the electrical performance of electrical equipment.
Preferably, the protective coating is a plasma-electroplated ceramic coating. The plasma plating ceramic coating is a technology for strengthening and modifying the surface of a material, and can ensure that the surface of the flange has the performances of wear resistance, corrosion resistance, high-temperature oxidation resistance, electric insulation, heat insulation, radiation protection, wear reduction, sealing and the like.
Preferably, the second region is provided with a first protective coating which is flush with the first region at the interface of the flanges. First protective coating sets up with first regional parallel and level, has realized the improvement of the leakproofness and the anticorrosive nature in bolt region.
Preferably, the third region is provided with a second protective coating, and the second protective coating is provided with a gap along the outer peripheral surface of the flange plate to accommodate the auxiliary sheath. The arrangement of the second protective coating realizes long-term effective contact between the third area and the auxiliary sheath, and the auxiliary sheath cannot be not attached to the flange due to corrosion of the third area, so that the sealing property is lost.
Preferably, the first region of the first flange and/or the second flange is provided with a groove, and the sealing ring is arranged in the groove. And the multiple sealing design further obstructs a water vapor invasion path.
The second purpose of the present invention is to provide an insulating pillar which can meet the electrical performance requirements of the electrical equipment installed inside the insulating pillar, and thus can safely operate the insulating pillar.
In order to realize the purpose of the utility model, the utility model adopts the following technical means: an insulating support column comprises two hollow insulators, and the two hollow insulators adopt the flange butt joint structure.
Drawings
Fig. 1 is a schematic cross-sectional view of a flange docking structure 100 according to a first embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a first flange 101 according to a first embodiment of the present invention;
fig. 3 is a perspective view of the auxiliary sheath 105 according to the first embodiment of the present invention;
fig. 4 is a schematic cross-sectional view of a flange butting structure 200 according to a second embodiment of the present invention;
fig. 5 is a schematic cross-sectional view of a second flange 202 after spraying a protective coating according to a second embodiment of the present invention;
fig. 6 is a schematic cross-sectional view of an auxiliary sheath 205 according to a second embodiment of the present invention;
fig. 7 is a schematic cross-sectional view of an insulating pillar 1000 according to a third embodiment of the present invention.
Detailed Description
As required, detailed embodiments of the present invention will be disclosed herein. However, it is to be understood that the disclosed embodiments are merely exemplary of the invention, which may be embodied in various forms. Therefore, specific details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present invention in virtually any appropriately detailed manner, including employing various features disclosed herein in connection with which such features may not be explicitly disclosed.
The first embodiment is as follows:
as shown in fig. 1 to 3, a flange butting structure 100 of the present embodiment includes a first flange 101 and a second flange 102, where the first flange 101 and the second flange 102 are fixedly connected by bolts 103, and two ends of the bolts 103 are covered with a sealant 104. In this embodiment, the flange plates of the first flange 101 and the second flange 102 are provided with sinking grooves 108, the bolts 103 and the nuts are sunk into the sinking grooves 108, and the gaps of the sinking grooves 108 are filled with the sealing materials 104. In other embodiments, the first flange and the second flange may not have the sink grooves, and the two ends of the bolt protrude from the flange plate, so that only the region where the two ends of the bolt contact with the air needs to be covered with the sealing material.
In this embodiment, the sealant 104 is room temperature vulcanized silicone rubber, and in other embodiments, the sealant can be any liquid sealant that can be cured at room temperature or under slight heating, and the specific type of sealant is not limited herein. Or, the sealing plug can be matched with the sinking groove and the bolt and is fixed by interference fit or adhesive bonding.
In this embodiment, the flange at the butt joint includes a first region 10A, a second region 20A, and a third region 30A in order from inside to outside in the radial direction of the flange. In the first region 10A, the first flange 101 and the second flange 102 are in contact with each other with a seal ring 106 interposed therebetween. In the second region 20A, the first flange 101 and the second flange 102 are provided with corresponding through holes 107, the diameter of the through hole 107 is slightly larger than the diameter of the shaft portion of the bolt 103, so that the bolt 103 passes through the through hole 107 and the clearance between the bolt 103 and the inner wall of the through hole 107 is small, and thus the clearance is negligible. In other embodiments, this gap may be filled by applying an adhesive around the shaft portion of the bolt 103.
In this embodiment, the third region 30A houses the auxiliary sheath 105, and the inner surface 1053, the upper surface 1051, and the lower surface 1052 of the auxiliary sheath 105 conform to the third region 30A. The third region 30A has a specific configuration in which an annular groove is formed along the outer peripheral surface of the flange plate after the first flange 101 and the second flange 102 are butted against each other. The auxiliary sheath 105 is made of an elastic material, such as a rubber material, a polyurethane elastomer, etc., so that the elastic material is deformed to a certain extent, i.e., compressed, by contact with the flange, so that the auxiliary sheath 105 has a sealing effect. In other embodiments, the auxiliary sheath may be made of other non-elastic materials as long as the sealing performance is achieved.
In this embodiment, the two ends of the bolt 103 of the flange butting structure 100 are sealed by the sealing material 104, so that the bolt 103 and the nut are not in direct contact with air and thus are prevented from being corroded. The auxiliary sheath 105 can prevent water vapor from invading from the butt joint surface of the flange, isolate the water vapor permeation channel and improve the whole tightness and corrosion resistance of the flange butt joint structure 100.
In this embodiment, the auxiliary sheath 105 is provided with an opening, the two ends of the opening are respectively provided with a first connecting portion 1054 and a second connecting portion 1055 which are matched with each other, and when the first connecting portion 1054 is connected with the second connecting portion 1055, the auxiliary sheath 105 is closed in the circumferential direction of the flange. Specifically, the connection mode is a hole pin type snap connection mode. As shown in fig. 3, the first connecting portion 1054 is provided with a pin, the second connecting portion 1055 is provided with a through hole, and the pin of the first connecting portion 1054 is inserted into the through hole of the second connecting portion 1055 to complete the connection.
In other embodiments, the first and second connecting portions may be provided with cooperating steps or with cooperating grooves and protrusions to assist in the secure connection in an adhesive manner. Alternatively, the connection may be made directly by gluing or sewing. The opening design of the auxiliary sheath 105 facilitates the installation of the auxiliary sheath 105, and is convenient. The form of the first connecting portion 1054 and the second connecting portion 1055 may also take various forms of connection, and is not particularly limited as long as the auxiliary sheath 105 can be closed in the circumferential direction of the flange.
In this embodiment, the auxiliary sheath 105 is fixed in the third area 30A by using an adhesive, which enables the inner surface 1053 of the auxiliary sheath 105 to be better attached to the flange, thereby further improving the sealing performance of the flange butting structure 100; meanwhile, the fixed connection of the auxiliary sheath 105 is further strengthened, the auxiliary sheath 105 is guaranteed not to fall off and fail, and long-term sealing performance protection is provided for the flange butt joint structure 100.
In this embodiment, the type of the adhesive may be an epoxy adhesive, a polyurethane adhesive, a room temperature vulcanized silicone rubber, and the like, which can achieve the purpose of bonding, and is not limited herein.
In other embodiments, the auxiliary sheath may be mounted by only using the above technical means of sealing and fixing the auxiliary sheath in the third area by using an adhesive, or only using the above technical means of providing the first connecting portion and the second connecting portion and fixedly connecting the first connecting portion and the second connecting portion by using a lap joint or an adhesive joint, and the above single technical means can achieve the purpose of sealing and fixing.
Example two:
as shown in fig. 4-6, a flange docking structure 200 according to a second embodiment of the present invention is different from the flange docking structure 100 in that an auxiliary sheath 205, a protective coating 208, and a first region 10B, a second region 20B, and a third region 30B of a flange docking surface are provided.
As shown in fig. 4 to 7, in the present embodiment, a step is formed between the first region 10B and the second region 20B, and a protective coating 208 is provided on the surface of the flange in the second region 20B and the third region 30B. The step formed between the first region 10B and the second region 20B is to facilitate the provision of a protective coating for the second region 20B; in second region 20B and third region 30B, the surface of ring flange sets up protective coating 208, can strengthen the anticorrosive ability of flange self, prevents that the flange from producing the gap after the face is corroded, makes inside steam invade the insulator, influences electrical equipment's electrical property.
In this embodiment, as shown in fig. 6, the upper surface and/or the lower surface of the auxiliary sheath 205 is provided with a spherical protrusion 2051. The number of the spherical protrusions 2051 is not limited, and the arrangement of the spherical protrusions 2051 enhances the fixation relationship between the auxiliary sheath 205 and the flange, so that the contact surface between the auxiliary sheath 205 and the flange is more fit. In other embodiments, the form of the protrusion 2051, without limitation, may be square or other shape.
In this embodiment, a step is also formed between the second region 20B and the third region 30B, and the effect after spraying the protective coating 208 is as shown in fig. 5, and a spherical groove 2083 is provided on the protective coating 208 in cooperation with the spherical protrusion 2051 of the auxiliary sheath 205.
In other embodiments, without spraying the protective coating, since the auxiliary sheath 205 is completely attached to the third area 30B of the flange, the first flange and the second flange are designed with the same mating grooves according to the form of the protrusion 2051 of the auxiliary sheath 205 to achieve the attaching effect. It can be understood that in the present embodiment, the spherical protrusion 2051 is disposed on the auxiliary sheath 205, and the spherical groove should be disposed at a position on the first flange 201 and the second flange 202, which is in contact with the spherical protrusion 2051 of the auxiliary sheath 205, so that the spherical protrusion 2051 is completely embedded in the spherical groove, and a minimum gap and a sufficient fit between the auxiliary sheath 205 and the flange are ensured to the maximum extent.
In this embodiment, the protective coating 208 is a plasma-electroplated ceramic coating. The plasma plating ceramic coating is a technology for strengthening and modifying the surface of a material, and can ensure that the surface of the flange has the performances of wear resistance, corrosion resistance, high-temperature oxidation resistance, electric insulation, heat insulation, radiation protection, wear reduction, sealing and the like.
In this embodiment, the second zone 20B is provided with a first protective coating 2081, and the first protective coating 2081 is flush with the first zone 10B at the interface of the flanges. The first protective coating 2081 is flush with the first region 10B, and improves the sealing property and corrosion resistance of the region between the bolt 203 and the through hole 207.
In this embodiment, the third region 30B is provided with a second protective coating 2082, and the second protective coating 2082 has a gap along the outer periphery of the flange to accommodate the auxiliary sheath 205. It can be understood that the third region 30B has a specific structure that after the first flange 201 and the second flange 202 are butted, an annular groove is formed along the outer peripheral surface of the flange plate, and after the second protective coating 2082 is sprayed, a new smaller annular groove is formed on the basis of the original annular groove. The second protective coating 2082 is arranged to realize long-term effective contact between the third area 30B and the auxiliary sheath 205, and the auxiliary sheath 205 does not lose tightness due to non-fit contact between the third area 30B and the flange due to corrosion.
In other embodiments, the surface of the flange plate can be provided with the protective coating only in one of the second area and the third area, the corrosion resistance and the sealing performance of the butt joint surface of the flange plate can also be ensured, and the protective coatings are arranged in the second area and the third area, so that the dual-guarantee effect can be realized. In addition, in other embodiments, the second region and the third region may not form a step, as long as the spraying of the protective coating and the installation of the auxiliary sheath can be completed.
In this embodiment, as shown in fig. 5, the first region 20B of the second flange 202 is provided with a groove 209, and the sealing ring 206 is disposed in the groove 209. And the multiple sealing design further obstructs the approach of water vapor invasion.
In other embodiments, the first region of the first flange may be provided with a groove, or the first regions of the first flange and the second flange may be provided with corresponding grooves, so that the sealing ring can be arranged in the groove.
Example three:
as shown in fig. 7, the third embodiment of the present invention provides an insulating pillar 1000, which includes two hollow insulators 300, and the two hollow insulators 300 adopt the flange butt-joint structure 200.
In other embodiments, the flange docking structure may be the flange docking structure 100 or the flange docking structure in other embodiments; the number of the hollow insulators is at least two, specifically, may be three, four, five, or the like, as long as the performance of the electrical device can be satisfied.
In this embodiment, the hollow insulator 300 is a composite insulator, and includes an insulating tube, flanges sleeved at two ends of the insulating tube, and a high-temperature vulcanized silicone rubber skirt injection-molded on the insulating tube. In other embodiments, the hollow insulator may be of other kinds, such as a porcelain insulator or a rigid plastic insulator.
The insulating strut 1000 adopts the flange butt joint structure, so that water vapor can be prevented from invading from the butt joint surface of the flange, a water vapor permeation channel is isolated, the butt joint surface of the flange and the bolt joint part can be protected from being corroded, the sealing property and the corrosion resistance of the insulating strut 1000 are improved, the electrical performance requirement of electrical equipment installed inside the insulating strut can be met, and the insulating strut can safely operate.
While the invention has been described with reference to the above disclosure, it will be understood by those skilled in the art that various changes and modifications in the above-described structures and materials, including combinations of features disclosed herein either individually or in any combination, will be apparent to one skilled in the art from the disclosure herein. These variants and/or combinations fall within the technical field of the present invention and are intended to be protected by the following claims.
Claims (10)
1. The utility model provides a flange butt joint structure, includes first flange and second flange, its characterized in that: the first flange and the second flange are fixedly connected by bolts, and sealing objects are coated at two ends of each bolt; on the ring flange of butt joint department, follow the radial from inside to outside of ring flange is first region, second region, third region in proper order first region, first flange with the laminating of second flange is equipped with the sealing washer between and the second region, first flange with the second flange sets up the through-hole that corresponds, the bolt passes the through-hole, auxiliary sheath is held in the third region, auxiliary sheath's internal surface, upper surface and lower surface with the laminating of third region.
2. The flange mating structure of claim 1, wherein: the upper surface and/or the lower surface of the auxiliary sheath is provided with a protrusion.
3. The flange mating structure of claim 1, wherein: the auxiliary sheath is provided with an opening, a first connecting portion and a second connecting portion which are matched with each other are arranged at two ends of the opening respectively, and when the first connecting portion is connected with the second connecting portion, the auxiliary sheath is closed in the circumferential direction of the flange plate.
4. The flange mating structure of claim 1, wherein: the auxiliary sheath is fixed on the third area in a sealing mode through bonding agents.
5. The flange mating structure of claim 1, wherein: and a step is formed between the first area and the second area, and a protective coating is arranged on the surface of the flange plate in the second area and/or the third area.
6. The flange mating structure of claim 5, wherein: the protective coating is a plasma plating ceramic coating.
7. The flange mating structure of claim 5, wherein: the second area is provided with a first protective coating, and the first protective coating is flush with the first area at the butt joint of the flange plates.
8. The flange mating structure of claim 5, wherein: and a second protective coating is arranged in the third area, and a gap is reserved along the outer peripheral surface of the flange plate for accommodating the auxiliary sheath.
9. The flange mating structure of claim 1, wherein: the first area of first flange and/or second flange sets up the recess, the sealing washer set up in the recess.
10. The utility model provides an insulating pillar, includes two hollow insulators, its characterized in that: the two hollow insulators adopt the flange butt joint structure of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921424113.9U CN210769890U (en) | 2019-08-29 | 2019-08-29 | Flange butt joint structure and insulating pillar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921424113.9U CN210769890U (en) | 2019-08-29 | 2019-08-29 | Flange butt joint structure and insulating pillar |
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| Publication Number | Publication Date |
|---|---|
| CN210769890U true CN210769890U (en) | 2020-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921424113.9U Active CN210769890U (en) | 2019-08-29 | 2019-08-29 | Flange butt joint structure and insulating pillar |
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| CN (1) | CN210769890U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113833854A (en) * | 2021-08-25 | 2021-12-24 | 中国华能集团清洁能源技术研究院有限公司 | Seal assembly |
-
2019
- 2019-08-29 CN CN201921424113.9U patent/CN210769890U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113833854A (en) * | 2021-08-25 | 2021-12-24 | 中国华能集团清洁能源技术研究院有限公司 | Seal assembly |
| CN113833854B (en) * | 2021-08-25 | 2024-02-06 | 中国华能集团清洁能源技术研究院有限公司 | Seal assembly |
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