阅读说明：本技术 一种空心支柱绝缘子 (A kind of Hollow Pillar insulator ) 是由 马斌 张俊杰 倪桂炎 于 2019-08-29 设计创作，主要内容包括：本发明提出一种空心支柱绝缘子,包括：空心绝缘管,包覆固定于空心绝缘管外周的伞裙,套接于空心绝缘管两端的法兰,以及设置于空心绝缘管内的端部密封结构。本申请中的空心支柱绝缘子,绝缘管两端采用端部密封结构进行封堵,端部密封结构有两层,一层为封端树脂层,一层为吸湿树脂层,在保证密封性能的同时可以保证绝缘管内的微水含量保持在标准值之下并且不影响绝缘子的内绝缘效果。空心支柱绝缘子内充有0.1～0.15Mpa的干燥气体,微正压的状态可使得绝缘子适用于各种海拔高度而不会出现负压情况。(The present invention proposes a kind of Hollow Pillar insulator, comprising: hollow insulation tube is coated and fixed on the full skirt of hollow insulation tube periphery, is socketed on the flange at hollow insulation tube both ends, and the end seal structure being set in hollow insulation tube.Hollow Pillar insulator in the application, insulation tube both ends are blocked using end seal structure, end seal structure has two layers, one layer is end block resins layer, one layer is moisture-absorption resin layer, can guarantee that the micro-water content in insulation tube is maintained under standard value and does not influence the interior insulation effect of insulator while guaranteeing sealing performance.Dry gas filled with 0.1~0.15Mpa in Hollow Pillar insulator, the state of micro-positive pressure may make insulator to be suitable for various height above sea levels without negative pressure condition.)

1. a kind of Hollow Pillar insulator, comprising: hollow insulation tube is coated and fixed on the full skirt of the hollow insulation tube periphery, And it is socketed on the flange at the hollow insulation tube both ends, which is characterized in that further include being set in the hollow insulation tube End seal structure, the end seal structure include at least two layers, one layer close to the flange of the end seal structure For end block resins layer, one layer far from the flange of the end seal structure is moisture-absorption resin layer, the Hollow Pillar insulation Filled with dry gas in sub.

2. Hollow Pillar insulator according to claim 1, which is characterized in that the hollow insulation tube both ends are all provided with End seal structure is stated, the end seal structure is tightly connected the hollow insulation tube and the flange.

3. Hollow Pillar insulator according to claim 2, which is characterized in that the end seal structure with it is described hollow The contact surface of the contact surface of insulation tube and/or the end seal structure and the flange is equipped at least groove or convex together It rises.

4. Hollow Pillar insulator according to claim 2, which is characterized in that the hollow insulation tube both ends inner wall is in cone Shape.

5. Hollow Pillar insulator according to claim 1, which is characterized in that the end seal structure with it is described hollow Insulation tube thermal expansion coefficient having the same.

6. Hollow Pillar insulator according to claim 1, which is characterized in that the absolute pressure of the gas be 0.1~ 0.15Mpa。

7. Hollow Pillar insulator according to claim 1, which is characterized in that the flange includes ring flange, the method Blue disk is equipped with first through hole, and the first through hole is for being arranged filling-valve, between the first through hole and the filling-valve Gap filling sealer.

8. Hollow Pillar insulator according to claim 7, which is characterized in that the end seal structure is equipped with second Through-hole, the first through hole, second through-hole are connected with the hollow insulation tube inner space.

9. a kind of production method of Hollow Pillar insulator, which comprises the following steps:

S1. hollow insulation tube is made；

S2. hollow insulation tube is vertically placed in the mold for filling hybrid resin, the hybrid resin includes at least sealing end tree Rouge and moisture-absorption resin make described hollow insulation tube one end filled with the hybrid resin, solidify the hybrid resin, the moisture absorption Resin solidification obtains the end seal structure positioned at described hollow insulation tube one end, the end above the end block resins Sealing structure includes at least end block resins layer and moisture-absorption resin layer；

S3. the hollow insulation tube is reversely vertically placed in the mold for filling the hybrid resin, so that the sky The other end of core insulation pipe is filled with the hybrid resin, solidifies the hybrid resin, the moisture-absorption resin solidification is in the envelope It holds above resin, obtains the end seal structure of the hollow insulation tube other end；

S4., second through-hole is set on the end seal structure obtained in the S2 and/or the S3 step, described second The extraneous space with inside the hollow insulation tube of through-hole connection；

S5. in the hollow insulation tube both ends mucilage binding flange, the flange is equipped with first through hole, the first through hole with it is described Second through-hole is connected, and filling-valve is arranged in the first through hole or second through-hole, fills out into the hollow insulation tube Fill dry gas；

S6. the first through hole and second through-hole are blocked using sealing material, is infused on the hollow insulation tube outer peripheral surface Penetrate full skirt.

10. a kind of production method of Hollow Pillar insulator, which comprises the following steps:

S1. hollow insulation tube is made；

S2. in the hollow insulation tube both ends mucilage binding flange, the flange is equipped with first through hole, the first through hole with it is described It is connected inside hollow insulation tube, filling-valve is equipped in the first through hole；

S3. dry gas is filled into the hollow insulation tube by the filling-valve；

S4. the hollow insulation tube is placed vertically, by the filling-valve, hybrid resin is packed into the hollow insulation tube One end, the hybrid resin includes at least end block resins and moisture-absorption resin, solidifies the hybrid resin, and the moisture-absorption resin is solid Change above the end block resins, obtains the end seal structure of described hollow insulation tube one end, the end seal structure is extremely It less include end block resins layer and moisture-absorption resin layer；

S5. the hollow insulation tube is reversely placed vertically, by the filling-valve, the hybrid resin is packed into the sky The other end of core insulation pipe, solidifies the hybrid resin, and the moisture-absorption resin solidification obtains described above the end block resins The end seal structure of the hollow insulation tube other end；

S6. the first through hole is blocked using sealing material, injects full skirt on the hollow insulation tube outer peripheral surface.

Technical field

The present invention relates to power industry power transmission and transformation equipment, more particularly to a kind of Hollow Pillar insulator.

Background technique

Composite insulator is broadly divided into two classes at present, and one kind is hollow combined insulator, and one kind is post composite insulator, Conventional post composite insulator is solid construction.However, the post composite insulator heavier mass of solid construction, is unfavorable for transporting Defeated and installation.

For this purpose, there is technical staff to propose Hollow Pillar insulator, but pure hollow support insulator, in mechanical strength and Have in terms of whole sealing performance to be strengthened.In addition, general Puffer-type insulator needs to increase drying device, internal do is improved Dry degree, but common drying device is metal mesh-like structure at present, reduce built-in electrical insulation apart from while, also result in cost It is higher.

Summary of the invention

Based on this, it is necessary to provide the insulator of a kind of high mechanical strength, good seal performance regarding to the issue above.There is provided one Kind Hollow Pillar insulator, comprising: hollow insulation tube is coated and fixed on the full skirt of hollow insulation tube periphery, and is socketed on sky The flange at core insulation pipe both ends, which is characterized in that further include the end seal structure being set in hollow insulation tube, end part seal Structure includes at least two layers, and end seal structure is end block resins layer close to one layer of flange, and end seal structure is far from flange One layer be moisture-absorption resin layer, filled with dry gas in Hollow Pillar insulator.

Further, hollow insulation tube both ends are equipped with end seal structure, and end seal structure is tightly connected hollow exhausted Edge pipe and flange.

Further, it is set on end seal structure and the contact surface of hollow insulation tube and/or end seal structure and flange There are at least one of groove or protrusion.

Further, hollow insulation tube both ends inner wall is tapered.

Further, end seal structure and hollow insulation tube thermal expansion coefficient having the same.

Further, the absolute pressure of gas is 0.1~0.15Mpa.

Further, flange includes ring flange, and ring flange is equipped with first through hole, and first through hole is used to that filling-valve to be arranged, Gap filling sealer between first through hole and filling-valve.

Further, end seal structure is equipped with the second through-hole, inside first through hole, the second through-hole and hollow insulation tube Space is connected.

The application also provides a kind of production method of Hollow Pillar insulator, comprising the following steps:

S1. hollow insulation tube is made；

S2. hollow insulation tube is vertically placed in the mold for filling hybrid resin, hybrid resin includes at least sealing end tree Rouge and moisture-absorption resin make hollow insulation tube one end filled with hybrid resin, solidify hybrid resin, and moisture-absorption resin solidification is set in sealing end Above rouge, obtain the end seal structure positioned at hollow insulation tube one end, end seal structure include at least end block resins layer and Moisture-absorption resin layer；

S3. hollow insulation tube is reversely vertically placed in the mold for filling hybrid resin, so that hollow insulation tube is another One end is filled with hybrid resin, solidifies hybrid resin, and moisture-absorption resin solidifies above end block resins, and it is another to obtain hollow insulation tube The end seal structure at end；

S4., second through-hole is set on the end seal structure obtained in S2 and/or S3 step, and the connection of the second through-hole is extraneous With the space inside hollow insulation tube；

S5. in hollow insulation tube both ends mucilage binding flange, flange is equipped with first through hole, and first through hole is connected with the second through-hole It is logical, filling-valve is set in first through hole or the second through-hole, fills dry gas into hollow insulation tube；

S6. first through hole and the second through-hole are blocked using sealing material, injects full skirt on hollow insulation tube outer peripheral surface.

The application also provides the production method of another Hollow Pillar insulator, comprising the following steps:

S1. hollow insulation tube is made；

S2. in hollow insulation tube both ends mucilage binding flange, flange is equipped with first through hole, in first through hole and hollow insulation tube Portion is connected, and filling-valve is equipped in first through hole；

S3. dry gas is filled into hollow insulation tube by filling-valve；

S4. hollow insulation tube is placed vertically, by filling-valve, hybrid resin is packed into one end of hollow insulation tube, Hybrid resin includes at least end block resins and moisture-absorption resin, solidifies hybrid resin, and moisture-absorption resin solidifies above end block resins, obtains To the end seal structure of hollow insulation tube one end, end seal structure includes at least end block resins layer and moisture-absorption resin layer；

S5. hollow insulation tube is reversely placed vertically, by filling-valve, hybrid resin is packed into the another of hollow insulation tube One end solidifies hybrid resin, and moisture-absorption resin solidifies above end block resins, obtains the end part seal knot of the hollow insulation tube other end Structure；

S6. first through hole is blocked using sealing material, injects full skirt on hollow insulation tube outer peripheral surface.

The beneficial effect of the application is: the Hollow Pillar insulator in the application, and insulation tube both ends use end part seal knot Structure is blocked, and sealing effect is enhanced, while in order to keep Hollow Pillar interior insulator dry, end seal structure is equipped with two Layer, one layer is end block resins layer, and one layer is moisture-absorption resin layer, can be guaranteed while guaranteeing sealing performance micro- in insulation tube Water content is maintained under standard value and does not influence the interior insulation effect of insulator.Hollow insulation tube end is tapered, can be with Increase sealing surface area, and end seal structure is squeezed by flange, enhancing end seal structure and hollow insulation Sealing performance between pipe improves bonding strong between end seal structure and hollow insulation tube in combination with coarse contact surface Degree.Dry gas filled with 0.1~0.15Mpa in Hollow Pillar insulator, the air pressure are 1~1.5 standard atmospheric pressure, and outer Portion's air pressure difference is little, and the state of micro-positive pressure may make insulator to be suitable for various height above sea levels without negative pressure feelings Condition.

Detailed description of the invention

Fig. 1 is the diagrammatic cross-section of the insulator of one embodiment of the invention.

Fig. 2 is the diagrammatic cross-section of the insulator of another embodiment of the present invention.

Fig. 3 is the diagrammatic cross-section of the insulator of further embodiment of this invention.

Specific embodiment

In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing to the present invention Specific embodiment be described in detail.Many details are explained in the following description in order to fully understand this hair It is bright.But the invention can be embodied in many other ways as described herein, those skilled in the art can be not Similar improvement is done in the case where violating intension of the present invention, therefore the present invention is not limited by the specific embodiments disclosed below.

It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to To another element or it may be simultaneously present centering elements.

Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more phases Any and all combinations of the listed item of pass.

As shown in Figure 1, one embodiment of the invention provides a kind of Hollow Pillar insulator 1000, including hollow insulation tube 1100, it is coated and fixed on the full skirt 1200 of hollow 1100 outer peripheral surface of insulation tube, is socketed on the flange at hollow 1100 both ends of insulation tube 1300, hollow insulation tube 1100 is interior filled with dry gas.End seal structure 1400, end are provided in hollow insulation tube 1100 Sealing structure 1400 is set to the both ends of hollow insulation tube 1100, and end seal structure 1400 is tightly connected hollow insulation tube 1100 With flange 1300.

End seal structure 1400 is double-layer structure, including end block resins layer 1410 and moisture-absorption resin layer 1420, and end is close Seal structure 1400 is end block resins layer 1410 close to one layer of flange 1300, for being tightly connected hollow insulation tube 1100 and flange 1300, one layer far from flange 1300 is moisture-absorption resin layer 1420, for absorbing the moisture in hollow insulation tube 1100.Wherein seal Hold resin layer 1410 that can prevent reaction by the strand both ends addition in epoxy resin, phenolic resin, polyurethane material Small molecule obtains, and the prevention reaction small molecule in end block resins layer 1410 can inhibit linear molecule chain reaction, and it is solid to improve resin The crosslinking degree of matrix after change, thus improve solidify after resin matrix crosslink density, formed solid space reticular structure, improve Modulus, Tg and the compactness of resin matrix, are conducive to the sealing of hollow insulator 1000.Moisture-absorption resin layer 1420 can then select The hygroscopic materials such as polyacrylate, hydrolysate polyacrylonitrile, vinyl acetate co-polymer, modified polyvinylalcohol are selected, are had good Vapor adsorption and storage capacity, be conducive to keep hollow insulation tube 1100 internally dry.

In other embodiments, end seal structure 1400 or three layers, four layers or more layers structure, sealing end It can also increase other structures according to actual needs between resin layer 1410 and moisture-absorption resin layer 1420, only need so that end Sealing structure 1400 is end block resins layer 1410 close to one layer of flange 1300, realize hollow insulation tube 1100 and flange 1300 it Between sealing, be moisture-absorption resin layer 1420 farthest away from one layer of flange 1300, can absorb the inner moisture of hollow insulation tube 1100 , it is not particularly limited herein.

End block resins layer 1410 on the contact surface of flange 1300 be equipped with the first protrusion 1401, correspondingly flange 1300 exists The contact surface is equipped with corresponding first groove 1301, and the first protrusion 1401 and the cooperation of the first groove 1301 can to block Combination between resin layer 1410 and flange 1300 is even closer, improves sealing performance.End block resins layer 1410 with it is hollow absolutely The contact surface of edge pipe 1100 is equipped with the second protrusion 1402, and correspondingly hollow insulation tube 1100 is equipped with corresponding on the contact surface Second groove 1102.In order to make the combination between end block resins layer 1410 and hollow insulation tube 1100 even closer, make second convex It rises and is arranged at an angle between 1402 and hollow insulation tube 1100.By taking underlying end seal structure 1400 as an example, the Two protrusions 1402 are raised obliquely, i.e., are in an angle between the center line of the second protrusion 1402 and the axial direction of hollow insulation tube 1100 Degree, the angle are the acute angle less than 90 °, and the second protrusion 1402, which is obliquely installed, is conducive to end block resins layer 1410 and hollow insulation tube Mutual extrusion between 1100 is conducive to bonding between the two, thus the sealing effect of enhancing between the two.Certainly, at other Embodiment in, which may be obtuse angle, as long as can play enhancing sealing effect, do not do specific limit herein System.

In order to guarantee the mechanical strength of Hollow Pillar insulator 1000, hollow 1100 middle part bulkhead of insulation tube can be kept In the case that thickness is constant, increases the wall thickness at hollow 1100 both ends of insulation tube, set taper knot for hollow 1100 both ends of insulation tube Structure.It is i.e. thicker by the wall thickness of close end, along end to hollow 1100 center position of insulation tube, the wall thickness of hollow insulation tube 1100 by It is decrescence small.Individually increase end wall thickness, keep the wall thickness of rest part constant, can increase under the premise of keeping lower cost The mechanical strength of strong Hollow Pillar insulator 1000.Since the stress point of Hollow Pillar insulator 1000 essentially consists in flange in the bottom 1300 with the junction of hollow insulation tube 1100, therefore can only thicken hollow insulation tube 1100 and be connected with flange in the bottom 1300 One end wall thickness, can further control cost.

End seal structure 1400 can be directly molded on hollow insulation tube by the modes such as being injection moulded, being pressed and molded 1100 end can also carry out preforming to end seal structure 1400, then pass through adhesive for end seal structure 1400 are sealingly mounted at hollow 1100 end of insulation tube.In order to further enhance the sealing performance of Hollow Pillar insulator 1000, Coarse processing is carried out to the surface that hollow insulation tube 1100 is contacted with end seal structure 1400, polishing, or molding can be passed through Etc. modes form Rough Horizontal Plane on the inner wall of hollow insulation tube 1100 and/or the side of end seal structure 1400, to make The sealed connection obtained between the two is more firm.

In order to guarantee at different ambient temperatures, it is able to maintain between end seal structure 1400 and hollow insulation tube 1100 Good sealing, by the type selecting of material and the adjustment of formula, so that end seal structure 1400 and hollow insulation tube 1100 Between thermal expansion coefficient having the same.For example, using the raw material of hollow insulation tube 1100 as end seal structure 1400 Raw material, the material of the two is identical, then thermal expansion coefficient must be the same；Or hollow insulation tube 1100 is under normal conditions Resin reinforced composites, end seal structure 1400 can be using the resin bases of the hollow insulation tube 1100 of production as former material Material, the thermal expansion coefficient of the two are also essentially identical, naturally it is also possible to by the addition of small powder, the thermal expansion coefficient of material is adjusted, It only needs so that being with identical or essentially identical thermal expansion coefficient between end seal structure 1400 and hollow insulation tube 1100 It can.

Filled with dry gas inside Hollow Pillar insulator 1000, the absolute pressure of dry gas is 0.1~0.15Mpa, The pressure of i.e. 1~1.5 standard atmospheric pressure, it is little with external pressure difference, it is less prone to leakage problem, and the shape of micro-positive pressure State may make insulator to be suitable for various height above sea levels, and be not in negative pressure condition, can be while reducing air-proof condition Meet requirement.

Flange 1300 includes ring flange 1310, and ring flange 1310 is provided centrally with first through hole 1311, first through hole 1311 For filling-valve 1700 to be arranged.It, can be in ring flange 1310 far from hollow exhausted for the ease of the installation and use of filling-valve 1700 A third groove 1312 is arranged in the end face of edge pipe 1100, and a step is formed between third groove 1312 and first through hole 1311 Face 13121, third groove 1312 and first through hole 1311 are coaxially disposed.The outer diameter of filling-valve 1700 is greater than first through hole 1311 Diameter is less than the diameter of third groove 1312, so that filling-valve 1700 can be set on step surface 13121.In other embodiments In, first through hole 1311 can be not provided with only being connected to exterior space and end seal structure 1400 in 1310 center of ring flange ；Third groove 1312 and first through hole 1311 can also be different axis setting, only need so that being connected between the two.It fills out Filling valve 1700 may be disposed in third groove 1312, i.e., filling-valve 1700 is submerged completely in flange 1300, and such setting can be with So that multiple Hollow Pillar insulators 1000 connect in which can be convenient.

In order to fix filling-valve 1700 while seal first through hole 1311, third groove 1312, using sealer, (figure is not Show) block gap between filling-valve 1700 and first through hole 1311, third groove 1312.Sealer can be selected common close Closure material, such as silicon rubber, polyurethane, polytetrafluoroethylene (PTFE), are not specifically limited herein.In other embodiments, it can also incite somebody to action Filling-valve 1700 is set as detachable structure, after completion of the filling removes filling-valve 1700, then to first through hole 1311 It is sealed with third groove 1312.

In other embodiments, as shown in Fig. 2, being examined for the ease of the operation conditions to Hollow Pillar insulator 1000 It surveys, it can be in an end seal structure 1400 of Hollow Pillar insulator 1000 along hollow 1100 axial direction of insulation tube Second through-hole 1411 is set, and first through hole 1311, the second through-hole 1411 are connected with hollow 1100 inner space of insulation tube, simultaneously Filling device 1700 can be used as air extractor use.It is of course also possible to all be arranged in two end seal structures 1400 Second through-hole 1411, in addition the second through-hole 1411 can not also be axially arranged along hollow insulation tube 1100, the second through-hole 1411 Path can be curve, only need so that first through hole 1311, the second through-hole 1411 are connected with hollow 1100 inner space of insulation tube It is logical.

The present invention also provides the production methods of Hollow Pillar insulator 1000, are realized with can be convenient according to this method hollow The production of support insulator 1000.The production method of one embodiment of the invention, in conjunction with Fig. 2, comprising the following steps:

S1. it makes to obtain enhancing composite material hollow insulation tube 1100 by modes such as pultrusion, windings.

S2. hollow insulation tube 1100 is vertically placed in the mold for filling hybrid resin, hybrid resin is in hollow insulation Curing molding in managing obtains the hollow insulation tube 1100 that one end is equipped with end seal structure 1400.Wherein hybrid resin is sealing end The mixture of resin and moisture-absorption resin, wherein end block resins and moisture-absorption resin are immiscible, and the density of the two is different, wherein The density of moisture-absorption resin is less than the density of end block resins, and in the stationary case, moisture-absorption resin can be migrated spontaneously to sealing end and be set Above rouge, i.e. the solidification of moisture-absorption resin layer 1420 above end block resins layer 1410, therefore moisture-absorption resin layer 1420 can with it is hollow 1100 inner space of insulation tube directly contacts, to realize moisture absorption.The end seal structure 1400 obtained by mold can Think solid construction, or center sets the structure of through-hole and/or groove, and the through-hole and/or groove can be used for setting and fill out Filling valve 1700, i.e. filling-valve 1700 can be set in flange 1300, it also can be set in end seal structure 1400, or It is set in flange 1300 and end seal structure 1400, the not office of the through-hole and/or groove number in end seal structure 1400 Be limited to 1, or 2,3 or more, specific number can be adjusted according to the actual situation.

S3., the hollow insulation tube 1100 obtained by step S2 is reversely vertically placed on to the mold for filling hybrid resin Interior, so that the other end of hollow insulation tube 1100 is also filled with hybrid resin, when same resin solidification, moisture-absorption resin layer 1420 is solid Change above end block resins layer 1410, obtains the end seal structure 1400 of hollow 1100 other end of insulation tube.

S4. if the end seal structure 1400 that is obtained by S2 and/or S3 step is do not set through-hole and/or groove solid Structure, then be arranged the second through-hole 1411 by way of punching on end seal structure 1400, and the second through-hole 1411 is connected to outer Space inside boundary and hollow insulation tube 1100, wherein the quantity of the second through-hole 1411 can be more than one.

S5. in the 1100 both ends mucilage binding flange 1300 of hollow insulation tube obtained by S4 step, flange 1300 includes flange Disk 1310, ring flange 1310 are equipped with first through hole 1311, and wherein first through hole 1311 is connected with the second through-hole 1411. Filling-valve 1700 is set in one through-hole 1311, by filling-valve 1700 by vacuum state in hollow insulation tube 1100, then Dry gas is filled into hollow insulation tube 1100, until the air pressure in hollow insulation tube 1100 reaches 0.1~0.15Mpa.

S6. after gas filling is completed, filling-valve 1700 is directly directly sealed in by first through hole by sealing material In 1311, Hollow Pillar insulator 1000 can be detected convenient for subsequent.Filling-valve 1700 can certainly be removed, then First through hole 1311 and the second through-hole 1411 are sealed using sealing material, is not particularly limited herein.After completing seal operation, Full skirt 1200 is injected on hollow 1100 outer peripheral surface of insulation tube.

Above-mentioned production method is solidified hybrid resin in hollow 1100 end of insulation tube, end seal structure by mold 1400 solidifications are completed and then are filled with dry gas into hollow insulation tube 1100 by way of punching, and this method institute is passed through Obtained 1400 surface of end seal structure is smooth and is connected firmly between hollow insulation tube 1100, obtained hollow branch Column insulator 1000 has good sealing performance.

The present invention also provides the production methods of another embodiment, in conjunction with Fig. 1, comprising the following steps:

S1. it makes to obtain enhancing composite material hollow insulation tube 1100 by modes such as pultrusion, windings.

S2. in hollow 1100 both ends mucilage binding flange 1300 of insulation tube, flange 1300 includes ring flange 1310, ring flange 1310 It is equipped with first through hole 1311, first through hole 1311 is connected to hollow 1100 inside of insulation tube and exterior space, first through hole 1311 Interior setting filling-valve 1700.

S3. by filling-valve 1700 by hollow 1100 inside vacuum state of insulation tube, then to hollow insulation tube Filling dry gas in 1100 is until the air pressure in hollow insulation tube 1100 reaches 1~1.5Mpa.

S4. hollow insulation tube 1100 is placed vertically, by filling-valve 1700, hybrid resin is filled to hollow insulation tube 1100 one end obtains the end seal structure 1400 of hollow 1100 one end of insulation tube, moisture-absorption resin layer after solidifying hybrid resin 1420 are located at 1410 top of end block resins layer.

S5. the reversed vertical placement of hollow insulation tube 1100 is filled hybrid resin to hollow exhausted by filling-valve 1700 The other end of edge pipe 1100 obtains the end seal structure 1400 of hollow 1100 other end of insulation tube after solidifying hybrid resin, inhales Wet resin layer 1420 is located at 1410 top of end block resins layer.

S6. after completion of the filling, first through hole 1311 is blocked using sealing material, after filling-valve 1700 being dismantled Filling-valve 1700 can also directly be sealed in end seal structure 1400 and flange 1300, not do specific limit herein by sealing System.Finally, injecting full skirt 1200 on hollow 1100 outer peripheral surface of insulation tube.

In other embodiments, as shown in figure 3, in S4 step, when potting resin, filling-valve 1700 can also be protruded into Inside hollow insulation tube 1100, first end block resins are filled to hollow 1100 end of insulation tube by filling-valve 1700, obtain band There is the end block resins layer 1410 of the second through-hole 1411.Pass through second after the solidification of end block resins layer 1410, then with filling-valve 1700 Through-hole 1411 fills moisture-absorption resin into hollow insulation tube 1100, so that moisture-absorption resin fills full second through-hole 1411 and covers envelope Hold 1410 surface of resin layer, obtain directly solidify above end block resins layer 1410 with the moisture-absorption resin layer of the second through-hole 1411 1420.In this embodiment, it is provided with through-hole 1411 in the end seal structure 1400 at 1000 both ends of Hollow Pillar insulator, And end block resins are filled in through-hole 1411.For ease of understanding, it is shown in underlying end seal structure 1400 in Fig. 3 End block resins layer 1410 and moisture-absorption resin layer 1420 illustrate only end block resins layer in the end seal structure 1400 being located above 1410.End seal structure 1400 is layered by filling-valve 1700 and is perfused and solidifies in hollow 1100 end of insulation tube, is passed through This perfusion filling mode can not consider that the formula for both mixing and how adjusting between moisture-absorption resin and end block resins makes Migration layering the problem of, the requirement to material is lower, and saves process, and production easy to process reduces cost.

Each technical characteristic of above embodiments can be combined arbitrarily, for simplicity of description, not to above-described embodiment In each technical characteristic it is all possible combination be all described, as long as however, the combination of these technical characteristics be not present lance Shield all should be considered as described in this specification.

Only several embodiments of the present invention are expressed for above embodiments, and the description thereof is more specific and detailed, but can not Therefore it is construed as limiting the scope of the patent.It should be pointed out that for those of ordinary skill in the art, In Under the premise of not departing from present inventive concept, various modifications and improvements can be made, and these are all within the scope of protection of the present invention. Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.