WO2020186957A1

WO2020186957A1 - Auxiliary skirt and auxiliary skirt mounting method

Info

Publication number: WO2020186957A1
Application number: PCT/CN2020/075928
Authority: WO
Inventors: 马斌
Original assignee: 江苏神马电力股份有限公司
Priority date: 2019-03-21
Filing date: 2020-02-20
Publication date: 2020-09-24

Abstract

The present invention relates to an auxiliary skirt. The auxiliary skirt is mounted on an insulator, the insulator comprising several main skirts. The auxiliary skirt comprises: an insulating support layer, covering the surface of the main skirts and connected as a single body with the main skirts by an adhesive; and an auxiliary skirt, covering the exterior of the insulating support layer and connected as a single body with the main skirts and the insulating support layer by the adhesive. The auxiliary skirt and the main skirts of the insulator are provided with the insulating support layer, thus ensuring that a stable adhesive injection gap is provided between the main skirts and the auxiliary skirt, allowing a sufficient amount of the adhesive to be filled, and ensuring that bonding is firm. Also related is an auxiliary skirt mounting method, which employs a vacuum adhesive injection process, allows air in an accommodating cavity to be completely expelled, allows the adhesive to completely fill bonding surfaces between the auxiliary skirt and the main skirts, and is highly efficient and suitable for batched mounting.

Description

Auxiliary umbrella and installation method of auxiliary umbrella

Technical field

The invention relates to the technical field of power equipment manufacturing, in particular to an auxiliary umbrella and an installation method of the auxiliary umbrella.

Background technique

In the field of high-voltage power transmission, in response to pollution flashover problems, power grid companies use composite insulators more in new construction projects. One type of composite insulators includes porcelain insulators and auxiliary umbrella skirts covering the insulators (main umbrella skirt), such as silicon Rubber umbrella skirt.

In traditional technology, when the auxiliary umbrella is installed, adhesive is applied to the porcelain umbrella skirt, and the silicone rubber umbrella skirt is directly covered on the porcelain umbrella skirt. However, this method has low bonding efficiency, inconvenient installation, and can not be mass-produced, and there may be air bubbles in the glue that are not eliminated, which affects the bonding strength of the silicone rubber umbrella skirt.

Summary of the invention

Based on this, it is necessary to provide an auxiliary umbrella to solve the problem of low bonding efficiency between the auxiliary umbrella skirt and the main umbrella skirt in the traditional technology. An insulator containing the auxiliary umbrella and an installation method of the auxiliary umbrella are also proposed.

An auxiliary umbrella is installed on an insulator, the insulator includes a plurality of main umbrella skirts, and the auxiliary umbrella includes:

The insulating support layer covers the surface of the main umbrella skirt and is connected to the main umbrella skirt by an adhesive as a whole; and

The auxiliary umbrella skirt is wrapped on the outside of the insulating support layer, and is connected to the insulating support layer and the main umbrella skirt by an adhesive as a whole.

In the above-mentioned auxiliary umbrella, the auxiliary umbrella skirt and the main umbrella skirt of the insulator are provided with an insulating support layer to ensure that a stable glue injection gap can be formed between the main umbrella skirt and the auxiliary umbrella skirt, and sufficient adhesive can be filled by vacuum injection. , To ensure the work efficiency when the auxiliary umbrella is installed to the insulator, and at the same time ensure the bonding strength between the auxiliary umbrella and the insulator.

In one of the embodiments, the insulating support layer has a mesh shape, and the grid of the insulating support layer is filled with the adhesive.

In one of the embodiments, the insulating support layer is an integral structure.

In one of the embodiments, the insulating support layer is nylon mesh or glass fiber mesh or resin mesh.

In one of the embodiments, the insulating support layer at least completely covers the surface of a single piece of the main umbrella skirt, and the auxiliary umbrella skirt completely covers at least a single piece of the main umbrella skirt.

In one of the embodiments, the inner surface of the auxiliary umbrella skirt forms a receiving cavity, the main umbrella skirt is integrally received in the receiving cavity, and the shape of the receiving cavity is the same as that of the receiving cavity. The outer surface shape of the corresponding part of the insulator is consistent.

In one of the embodiments, the auxiliary umbrella skirt is a silicone rubber umbrella skirt, the auxiliary umbrella skirt is provided with an opening along the radial direction, and the opening is used to open the auxiliary umbrella skirt and incorporate the main umbrella skirt into the In the containing cavity.

In one of the embodiments, the insulating support layer includes a plurality of support units arranged at intervals on the surface of the main umbrella skirt, and the gap between adjacent support units is filled with the adhesive.

In one of the embodiments, the gaps between the outer surface of the main umbrella skirt and the inner surface of the auxiliary umbrella skirt are uniform everywhere.

In one of the embodiments, the outer surface of the auxiliary shed is provided with a first through hole and a second through hole, and both the first through hole and the second through hole are insulated from the surrounding of the auxiliary shed The inner cavity of the support layer is connected.

In one of the embodiments, a semi-permeable membrane is provided in the first through hole or the second through hole.

In one of the embodiments, the insulator further includes a rod body, a plurality of the main umbrella skirts extend outward from the rod body, a vacuum tape is provided between the auxiliary umbrella skirt and the rod body, and the vacuum tape protects the The gap between the auxiliary umbrella skirt and the rod body is sealed.

In one of the embodiments, a sealant layer is also provided on the vacuum tape.

In one of the embodiments, the thickness of the insulating support layer is 0.5 mm to 5 mm.

An insulator is also proposed, which has the auxiliary umbrella described in any one of the foregoing.

Aiming at the problems of complicated procedures and low efficiency existing in the installation method of the traditional covered silicone rubber umbrella skirt, an auxiliary umbrella installation method is provided.

An auxiliary umbrella installation method is used to install the auxiliary umbrella on an insulator, the insulator includes a plurality of main umbrella skirts, the auxiliary umbrella includes an auxiliary umbrella skirt covering at least a single piece of the main umbrella skirt, so The auxiliary umbrella skirt is provided with an opening in the radial direction, and its inner surface encloses a receiving cavity for accommodating the main umbrella skirt, and the outer surface of the auxiliary umbrella skirt is provided with a first through hole and a second through hole communicating with the receiving cavity. Hole; the method includes the following steps:

a. Wrap a layer of insulating support layer on the main umbrella skirt, and cover the auxiliary umbrella skirt outside the insulating support layer;

b. Seal the upper and lower ends of the auxiliary umbrella skirt and the insulator and the opening respectively;

c. Utilize the second through hole to vacuum the containing cavity, so that the adhesive enters the containing cavity from the first through hole and fills the containing cavity;

d. Blocking the first through hole and the second through hole respectively.

The above-mentioned installation method adopts a vacuum glue injection process, which can completely drain the air in the receiving cavity, and the adhesive can completely fill the bonding surface between the auxiliary umbrella group and the main umbrella skirt, with high efficiency and suitable for batch installation.

In one of the embodiments, the thickness of the insulating support layer ranges from 0.5 mm to 5 mm.

In one of the embodiments, in the step a, the insulating support layer at least completely covers the surface of a single piece of the main umbrella skirt.

In one of the embodiments, in the step a, the gaps between the outer surface of the main umbrella skirt and the inner surface of the auxiliary umbrella skirt are uniform.

In one of the embodiments, the insulating support layer includes a plurality of support units arranged at intervals on the surface of the main umbrella skirt, and in the step c, the adhesive fills the gap between the adjacent support units , And fill the gap between the support unit and the inner surface of the auxiliary shed, and fill the gap between the support unit and the outer surface of the corresponding part of the main shed.

In one of the embodiments, the insulating support layer has a mesh shape. In step c, the adhesive fills the mesh of the insulating support layer, and fills the insulating support layer and the auxiliary umbrella skirt. The gap between the inner surfaces of the shed, and the gap between the insulating support layer and the outer surface of the corresponding part of the main umbrella skirt.

In one of the embodiments, in the step b, vacuum tape is used for sealing.

In one of the embodiments, the step c includes:

c1. Connect a first pipe to the first through hole, and immerse the first pipe in the adhesive;

c2. Connect the second through hole to a vacuum pump through a second pipe;

c3. Utilize the vacuum pump to vacuum the receiving cavity.

In one of the embodiments, in the step c2, a semi-permeable membrane is provided on the second through hole or in the second pipe.

In one of the embodiments, the step c3 specifically includes:

Closing the control valve of the first pipeline;

Vacuuming, so that a vacuum degree less than or equal to 1000 Pa is formed in the receiving cavity;

The control valve is opened, so that the adhesive enters the containing cavity from the first pipe under the action of negative pressure.

In one of the embodiments, the adhesive has undergone a de-bubble treatment in advance, and the viscosity of the adhesive ranges from 50 mPa·s to 1000 mPa·s.

In one of the embodiments, the insulator is a porcelain insulator, and the auxiliary umbrella skirt is a silicone rubber umbrella skirt.

In one of the embodiments, in the step d, the first through hole and the second through hole are respectively blocked by insulating plugging.

In one of the embodiments, after the step d, it further includes the step of further disposing a sealant on the vacuum tape and curing it to form a sealant layer.

In one of the embodiments, after the step d, it further includes the step:

Remove the vacuum tape;

Sealing glue is used to seal the upper and lower ends of the auxiliary umbrella skirt and the insulator.

In one of the embodiments, the outer surface of the auxiliary umbrella skirt includes an upper surface, a lower surface and a side surface connecting the two, and the first through hole and the second through hole are respectively opened on the upper surface and the The lower surface, and the first through hole and the second through hole are staggered in the circumferential direction.

Description of the drawings

1 is a schematic cross-sectional structure diagram of an auxiliary umbrella installed on an insulator according to an embodiment of the present invention;

2 is a schematic diagram of the auxiliary umbrella of an embodiment of the present invention when the auxiliary umbrella is installed on the insulator, and the glue is injected;

Figure 3 is a partial enlarged view of the second through hole of the auxiliary umbrella in Figure 2;

Figure 4 is a schematic structural diagram of an embodiment of the present invention when the auxiliary umbrella skirt is sheathed on the main umbrella skirt but has not yet been sealed;

5 is a schematic top view of the structure shown in FIG. 4;

Fig. 6 is a schematic bottom view of the structure shown in Fig. 4;

7 is a schematic diagram of an insulating support layer on the upper surface of the main umbrella skirt on the insulator according to an embodiment of the present invention;

8 is a schematic diagram of an insulating support layer covered on the lower surface of the main umbrella skirt on the insulator according to an embodiment of the present invention;

Figure 9 is a schematic diagram of the structure shown in Figure 4 after being sealed;

10 is a schematic top view of the structure shown in FIG. 9;

Figure 11 is a schematic bottom view of the structure shown in Figure 10;

Figure 12 is a schematic diagram of the structure of the insulating seal.

detailed description

In order to make the above-mentioned objectives, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following description, many specific details are explained in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or a central element may also exist. When an element is considered to be "connected" to another element, it can be directly connected to the other element or an intermediate element may be present at the same time.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The term "and/or" as used herein includes any and all combinations of one or more related listed items.

The embodiment of the present invention provides an auxiliary umbrella 10 for mounting on the insulator 20. As shown in FIG. 1, the insulator 20 involved in the embodiment of the present invention is preferably a porcelain insulator, and includes a rod body 210 and a plurality of main umbrella skirts 220 extending outward from the rod body 210. In FIG. 1, as an example, only the structure when the insulator 20 is provided with a single-piece main shed 220 is shown, but the number of the main shed 220 is not limited to one, and multiple main sheds 220 can be arranged along the axial direction of the rod body 210. .

As shown in FIGS. 1 to 3, the auxiliary umbrella 10 includes an insulating support layer 110 and an auxiliary umbrella skirt 120. The insulating support layer 110 covers the surface of the main umbrella skirt 220 and is connected to the main umbrella skirt 220 by an adhesive 130. As a whole; the auxiliary umbrella skirt 120 is wrapped on the outside of the insulating support layer 110, and is connected to the insulating support layer 110 and the main umbrella skirt 220 by an adhesive 130 as a whole. An insulating support layer 110 is provided between the auxiliary umbrella skirt 120 and the main umbrella skirt 220 of the insulator 20. The insulating support layer 110 can prevent the auxiliary umbrella skirt 120 from directly adhering to the main umbrella skirt 220, ensuring that the auxiliary umbrella skirt 120 and the main umbrella skirt 220 A stable glue injection gap can be formed therebetween, and enough adhesive 130 can be filled when the adhesive 130 is filled, thereby ensuring a firm bond. Understandably, the adhesive 130 firmly connects the insulating support layer 110, the auxiliary shed 120, and the main shed 220 to each other after curing. In other words, after the auxiliary umbrella 10 is firmly attached to the insulator 20, the adhesive 130 is in a cured state.

The material of the insulating support layer 110 is not limited, and it can be a hard material, or a soft or elastic material. The thickness of the insulating support layer 110 is generally 0.5 mm to 5 mm, so as to form a stable glue injection between the main umbrella skirt 220 and the auxiliary umbrella skirt 120 without greatly affecting the volume of the auxiliary umbrella skirt 120 gap. In actual production, the thickness of the insulating layer 110 can be arbitrarily selected within the above range, such as 0.5 mm, 1 mm, 1.5 mm, 1.8 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm or 5 mm.

In some embodiments, the insulating support layer 110 has a mesh shape, and the grid of the insulating support layer 110 is filled with adhesive 130. Specifically, the insulating support layer 110 may be a mesh element such as nylon mesh, glass fiber mesh, or resin mesh. The preparation technology of similar mesh elements is mature, low cost, wide source, and easy to obtain. The adhesive 130 also fills the mesh of the insulating support layer 110 at the same time, so that multiple bonding points can be formed between the mesh insulating support layer 110 and the auxiliary shed 120, and the insulating support layer 110 and the main shed Multiple bonding points are formed between 220 to improve the reliability of bonding.

In some embodiments, the insulating support layer 110 is an integral structure, so that when the insulating support layer 110 is covered on the surface of the main umbrella skirt 220, the insulating support layer 110 can be covered outside the main umbrella skirt 220 with only one operation. More convenient. However, the insulating support layer 110 may also be a split type, that is, the insulating support layer 110 may include multiple support units arranged on the surface of the main umbrella skirt 220. For example, the insulating support layer 110 may be supported by three upper, middle and lower parts. The three supporting units are sequentially covered on the main umbrella skirt 220 along the axial direction of the rod body 210 from top to bottom.

Or, in some other embodiments, the insulating support layer 110 is divided into three parts along the circumference of the main umbrella skirt 220, the three parts form a complete ring along the circumference, or the three parts are arranged along the circumference along the circumference. A certain distance, but still based on the stable glue injection gap formed between the auxiliary umbrella skirt 110 and the main umbrella skirt 220. In other embodiments, the split insulating support layer 110 is not limited to three support units, and can also be two, four or more.

As shown in FIG. 1, the insulating support layer 110 completely covers the surface of the single-piece main umbrella skirt 220, and the auxiliary umbrella skirt 120 completely covers the single-piece main umbrella skirt 220 at least. In other words, the exposed surface of the main umbrella skirt 220 is covered by the insulating support layer 110. As shown in FIGS. 7 and 8, the upper and lower surfaces of the main umbrella skirt 220 are covered with the insulating support layer 110. When there are multiple main umbrella skirts 220, each main umbrella skirt 220 is covered with an insulating support layer 110. At this time, all the insulating support layers 110 can be connected as a whole, that is, an integrated structure. The supporting layer 110 has an opening, which is convenient to cover it on the main umbrella skirt 220. After the auxiliary umbrella skirt 120 is covered on the outside of the insulating support layer 110, under the support of the insulating support layer 110, the gaps between the outer surface of the main umbrella skirt 220 and the inner surface of the auxiliary umbrella skirt 120 are uniform. After the adhesive 130 is filled, the bonding strength of the outer surface of the main umbrella skirt 220 and the inner surface of the auxiliary umbrella skirt 120 is relatively uniform, which is beneficial to improve the stability of the combination of the auxiliary umbrella skirt 120 and the main umbrella skirt 220.

In other embodiments, the insulating support layer 110 may only cover a part of the surface of the single-piece main umbrella skirt 220. For example, when the insulating support layer 110 is composed of three supporting units arranged at intervals, the three supporting units are sequentially sleeved on the main shed 220 along the axial direction of the rod 210 from top to bottom. A part of the surface is not covered by the insulating support layer 110, but the existence of the insulating support layer 110 still ensures that when the adhesive 130 is injected, the gap between the outer surface of the main umbrella skirt 220 and the inner surface of the auxiliary umbrella skirt 120 remains stable. At this time, the gap between adjacent support units is also filled with adhesive 130.

Of course, the present invention is not limited to this. In other embodiments, the insulating support layer 110 may also cover all or part of the upper surface of the main umbrella skirt 220, and the corresponding auxiliary umbrella skirt 120 also covers only the main umbrella skirt 220 at this time. The entire upper surface or part of the upper surface.

As shown in Figures 2 and 3, the inner surface of the auxiliary umbrella skirt 120 forms a receiving cavity 121, that is, the contour of the inner surface of the auxiliary umbrella skirt 120 is set to be able to enclose a receiving space, so that the main umbrella skirt 220 can be integrated The ground is contained in the receiving cavity 121, and the shape of the receiving cavity 121 is consistent with the shape of the outer surface of the corresponding part of the insulator 20 covered by the receiving cavity 121. In this way, each area on the surface of the main umbrella skirt 220 is covered and protected by the auxiliary umbrella skirt 120.

In order to facilitate the installation of the auxiliary umbrella skirt 120, the auxiliary umbrella skirt 120 adopts a flexible silicone rubber umbrella skirt, and as shown in FIG. 4, the auxiliary umbrella skirt 120 is provided with an opening 122 along the radial direction. The opening 122 is used for opening the auxiliary shed 120 and receiving the main shed 220 into the receiving cavity 121. After the main umbrella skirt 220 is incorporated into the receiving cavity 121, the opening 122 is closed by the filling body 123. In this embodiment, as shown in FIGS. 4 to 6, fan-shaped recessed areas 128 are provided on both sides of the opening 122. The recessed areas 128 are grooves with a certain depth. The filling body 123 is filled in the recessed area 128, and the filling body 123 The shape and thickness of φ are correspondingly matched with the recessed area 128, and the outer surface of the auxiliary shed 120 is flush after filling, and the effect after filling is shown in Figs. 9-11. Specifically, the filling body 123 is a preformed silicone rubber sheet, which is bonded in the recessed area 128 by an adhesive.

In other embodiments, the opening 122 is only a straight seam along the radial direction of the auxiliary umbrella skirt 120. After the main umbrella skirt 220 is included in the receiving cavity 121, no filling body is required, and the auxiliary umbrella skirt 120 at the opening 122 is directly inserted. It can be glued together; or the shape of the opening 122 and the filling body 123 can be non-fan shapes, straight bars with the same width, etc.; or the filling body 123 can also be raw rubber, which is preformed to match the shape of the recessed area 128 During installation, the opening 122 is closed by high temperature vulcanization and fixing in the recessed area 128. Here, there is no specific restriction on the shape of the opening 122 or the filling body 123, as long as the auxiliary umbrella skirt 120 can be closed in cooperation with each other in the circumferential direction.

As shown in FIG. 2, the outer surface of the auxiliary umbrella skirt 120 is also provided with a first through hole 124 and a second through hole 125, and the first through hole 124 and the second through hole 125 are both insulated and supported by the auxiliary umbrella skirt 120. The inner cavity of the layer 110 is connected. That is, both the first through hole 124 and the second through hole 125 are in communication with the aforementioned receiving cavity 121. One of the first through hole 124 and the second through hole 125 is used as a glue injection hole, and the other is used as an exhaust hole or a vacuum hole. The installer can fill the adhesive 130 into the accommodating cavity 121 by manually injecting glue; it can also complete the filling of the adhesive 130 by vacuuming. The use of vacuum negative pressure to fill the adhesive has the advantage of high efficiency. It is suitable for batch installation and can completely drain the air in the receiving cavity 121 so that the adhesive 130 can fill the receiving cavity 121. The adhesive 130 is in a non-cured state during glue injection and has fluidity.

It should be noted that in this embodiment, the terms first and second are only used to distinguish one element from another element. For example, without departing from the scope of the present invention, a first element may be referred to as a second element, and similarly, the second element may be referred to as a first element.

In the embodiment of the present invention, when the adhesive 130 is filled by vacuum, the gap between the auxiliary umbrella skirt 120 and the rod body 210 and the opening 122 need to be sealed separately to facilitate the vacuum injection. The adhesive 130 filled into the accommodating cavity 121 has undergone a de-bubble treatment in advance, and there is no air bubbles in the adhesive 130 that affect the electrical performance of the main umbrella skirt 220. The viscosity of the adhesive 130 ranges from 50 mPa·s to 1000 mPa·s. The fluidity of the adhesive 130 in this viscosity range is good, which is good for filling the containing cavity 121 and ensures that the adhesive 130 can be evenly distributed in the containing cavity 121.

Furthermore, a semi-permeable membrane 1251 is also provided in the first through hole 124 or the second through hole 125. The semipermeable membrane 1251 is a thin film that allows air to pass but does not allow the adhesive 130 to pass. In this way, during subsequent vacuum injection and glue injection, the adhesive 130 will not overflow from the accommodating cavity 121, thereby saving the adhesive 130 and avoiding the problem of the adhesive 130 being discharged from the second pipe 1262.

Specifically, as shown in FIGS. 2 and 3, the second through hole 125 is provided with a semi-permeable membrane 1251 and the adhesive 130 is filled with a vacuum as an example for description. At this time, the second through hole 125 is used as a vacuum hole, and the first through hole 124 is used as a glue injection hole. As shown in Figure 2, the first pipe 1261 is connected to the first through hole 124 and extends into the adhesive 130, the second through hole 125 is connected to the vacuum pump 1263 through the second pipe 1262, and the first pipe 1261 is closed. The valve 12611 then evacuates the receiving cavity 121. After the vacuum is completed, the valve 12611 is opened to allow the adhesive 130 to enter through the first through hole 124 and fill the receiving cavity 121. In other embodiments, as shown in FIG. 2, when the adhesive 130 is filled into the receiving cavity 121 by vacuuming, the semi-permeable membrane 1251 may also be provided in the second pipe connected to the second through hole 125 In 1262. In addition, in other embodiments, as shown in FIG. 2, the second through hole 125 and the second pipe 1262 may both be provided with a semi-permeable membrane 1251.

After the adhesive 130 is filled, the first through hole 124 and the second through hole 125 are respectively sealed by the insulating plug 40 shown in FIG. 12, and the adhesive 130 in the receiving cavity 121 is isolated from the outside. The adhesive 130 is not affected by environmental factors, and the effect after sealing is shown in FIG. 1. The insulating seal plug 40 uses a rubber plug, which is flexible and easy to insert.

Further, as shown in FIG. 2, the outer surface of the auxiliary umbrella skirt 120 includes an upper surface 1201, a lower surface 1202, and a side surface 1203 connecting the two. The first through hole 124 is opened on the lower surface 1202, and the second through hole 125 is opened on The upper surface 1201, and the first through hole 124 and the second through hole 125 are staggered in the circumferential direction. Specifically, in this embodiment, the first through hole 124 and the second through hole 125 are offset by 180 degrees in the circumferential direction, so that the connection line between the first through hole 124 and the second through hole 125 is connected to the rod 210 of the insulator 20 Axial cross. When the adhesive 130 is filled into the receiving cavity 121 by vacuuming, the adhesive 130 flows obliquely upward after entering from the first through hole 124, and the flow path of the adhesive 130 in the receiving cavity 121 is longer, which is conducive to sufficient The space of the receiving cavity 121 is completely filled with the adhesive 130, and no air bubbles remain, and the filling effect is better.

Furthermore, as shown in FIG. 1, there is a vacuum tape 30 between the auxiliary umbrella skirt 120 and the rod body 210 of the insulator 20, and the vacuum tape 30 seals the gap between the auxiliary umbrella skirt 120 and the rod body 210. The upper and lower ends of the auxiliary umbrella skirt 120 connecting with the rod body 210 have gaps. The vacuum tape 30 is used to seal the two gaps, thereby isolating the adhesive 130 from the outside and prolonging the life of the adhesive 130. The vacuum tape 30 can seal the above-mentioned gap by winding multiple turns on the rod body 210, which is easy to implement. In addition, when the adhesive 130 is filled by the vacuum injection method, the vacuum tape 30 may be used to seal the gap in advance to facilitate subsequent vacuuming operations; of course, in other embodiments, the gap may also be sealed by other methods.

Furthermore, a sealant layer is also provided on the vacuum tape 30. A sealant layer may be further provided on the vacuum tape 30. The sealant may be RTV (Room Temperature Vulcanized Silicone Rubber) or other resin glue that can be cured at room temperature to improve the sealing effect.

As shown in FIG. 1, an embodiment of the present invention also provides an insulator including the auxiliary umbrella 10 of the above embodiment. The auxiliary umbrella 10 and the insulator 20 described above are included. Specifically, the insulating support layer 110 of the auxiliary umbrella 10 covers the surface of the main umbrella skirt 220, and is connected to the main umbrella skirt 220 as a whole by the adhesive 130; the material of the insulating support layer 110 is not limited, and it can be a rigid material, It can also be a soft or elastic material. The auxiliary umbrella skirt 120 covers the outside of the insulating support layer 110 and is connected to the insulating support layer 110 and the main umbrella skirt 220 by an adhesive 130 as a whole. In the insulator 20 of this embodiment, the main umbrella skirt 220 is covered with an auxiliary umbrella 10, an insulating support layer 110 is provided between the main umbrella skirt 220 and the auxiliary umbrella skirt 120 of the auxiliary umbrella 10, and the insulating support layer 110 can ensure the auxiliary umbrella skirt 120 A stable glue injection gap can be formed between the main umbrella skirt 220, and enough adhesive 130 can be filled to ensure that the auxiliary umbrella skirt 120 is firmly bonded, and the insulator 20 can resist pollution flashover, ice flashover, and rain flashover. ability.

Another embodiment of the present invention provides an auxiliary umbrella installation method for installing the auxiliary umbrella on the insulator. As shown in FIG. 1 and FIG. 2, the auxiliary umbrella 10 of this embodiment is installed on the insulator 20. The insulator 20 is preferably a porcelain insulator, and includes a rod body 210 and a plurality of main umbrella skirts 220 extending outward from the rod body 210. The auxiliary umbrella 10 is preferably a silicone rubber umbrella skirt, including an auxiliary umbrella skirt 120 covering at least a single piece of the main umbrella skirt 220. As shown in FIGS. 2 and 3, the inner surface of the auxiliary umbrella skirt 120 is enclosed to accommodate the main umbrella skirt 220. Receiving cavity 121. The outer surface of the auxiliary umbrella skirt 120 is provided with a first through hole 124 and a second through hole 125 communicating with the receiving cavity 121. As shown in FIG. 4, the auxiliary umbrella skirt 120 is provided with an opening 122 in the radial direction.

As shown in FIGS. 2 and 3, the inner surface of the auxiliary umbrella skirt 120 forms a receiving cavity 121, that is, the contour of the inner surface of the auxiliary umbrella skirt 120 is set to be able to enclose a receiving space. The main umbrella skirt 220 is integrally received in the receiving cavity 121, and the shape of the receiving cavity 121 is preferentially set to be consistent with the shape of the outer surface of the corresponding part of the insulator 20 covered by the receiving cavity 121. In this way, each area on the surface of the main umbrella skirt 220 is covered and protected by the auxiliary umbrella skirt 120.

The installation method of the auxiliary umbrella of this embodiment includes the following steps:

a. Put the auxiliary umbrella skirt 120 on the corresponding main umbrella skirt 220. 4-6, the auxiliary umbrella skirt 120 is opened by the opening 122 and the main umbrella skirt 220 is placed in the receiving cavity 121, so that the auxiliary umbrella skirt 120 is sleeved on the main umbrella skirt 220, as shown in FIGS. 1 and 2.

In FIG. 1, as an example, only the structure when the insulator 20 is provided with a single-piece main shed 220 is shown, but the number of the main shed 220 is not limited to one, and multiple main sheds 220 can be arranged along the axial direction of the rod body 210. . At this time, the auxiliary umbrella skirt 120 correspondingly has a plurality of receiving cavities 121 for accommodating the corresponding main umbrella skirt 220 respectively.

The accommodating cavity 121 can be filled with an adhesive 130, and the auxiliary shed 120 and the corresponding main shed 220 are firmly bonded by the adhesive 130. Further, in order to prevent the auxiliary umbrella skirt 120 from being put on the corresponding main umbrella skirt 220, the auxiliary umbrella skirt 120 is directly attached to the main umbrella skirt 220, which affects the subsequent injection of the adhesive 130. Before step a, it can also include steps:

a1. Cover the main umbrella skirt 220 with an insulating support layer 110. Referring to FIGS. 7 and 8, the main umbrella skirt 220 is first covered with an insulating support layer 110. In this step, after the auxiliary umbrella skirt 120 is covered on the outside of the insulating support layer 110, under the support of the insulating support layer 110, the auxiliary umbrella skirt 120 will not directly adhere to the surface of the main umbrella skirt 220. The gaps between the inner surface of the auxiliary umbrella skirt and the outer surface of the main umbrella skirt 220 are uniform, so that after the subsequent adhesive 130 is filled, the bonding strength between the inner surface of the auxiliary umbrella skirt 120 and the outer surface of the main umbrella skirt 220 is relatively Even, it is beneficial to improve the stability of the combination of the auxiliary umbrella skirt 120 and the main umbrella skirt 220.

In this step, the insulating support layer 110 at least completely covers the surface of the single-piece main umbrella skirt 220, that is, the exposed surface of the main umbrella skirt 110 is covered by the insulating support layer 110, as shown in Figure 1, Figure 7 and Figure 8. As shown, the upper and lower surfaces of the main umbrella skirt 110 are both covered with an insulating support layer 110. At this time, the insulating support layer 110 can be an integrated structure, so that when the insulating support layer 110 is covered on the surface of the main umbrella skirt 220, the insulating support layer 110 can be covered outside the main umbrella skirt 220 with only one action, which is more convenient for installation . However, the insulating support layer 110 may also be a split type, that is, the insulating support layer 110 may include multiple support units arranged on the surface of the main umbrella skirt 220. For example, the insulating support layer 110 may be supported by three upper, middle and lower parts. The unit is composed of the main umbrella skirt 220 sequentially from top to bottom along the axial direction of the rod body 210. Or, in other embodiments, the insulating support layer 110 is divided into three parts along the circumference of the main shed 220, and the three parts form a complete loop along the circumference, or the three parts are along the circumference between each other. There is a certain distance, but it is still subject to a stable glue injection gap formed between the auxiliary umbrella skirt 110 and the main umbrella skirt 220. In other embodiments, the split insulating support layer 110 is not limited to three support units, and may also be two, four or more. When multiple main umbrella skirts 220 are provided, each main umbrella skirt 220 is covered with an insulating support layer 110. At this time, all the insulating support layers 110 can be connected as a whole, which can be an integrated structure.

In other embodiments, the insulating support layer 110 may also partially cover the surface of the main umbrella skirt 220. For example, the insulating support layer 110 may include multiple support units arranged at intervals on the surface of the main umbrella skirt 220. For example, the insulating support layer 110 is composed of upper, middle, and lower support units, and the surface of the main umbrella skirt 220 has a partial area. Not covered by the insulating support layer 110, the insulating support layer 110 can also prevent the auxiliary umbrella skirt 120 from being put on the corresponding main umbrella skirt 220, and the auxiliary umbrella skirt 120 is directly attached to the main umbrella skirt 220, so that the main umbrella skirt 220 A gap is formed between the outer surface and the inner surface of the auxiliary shed 120 and remains stable.

a2. Sleeve the auxiliary umbrella skirt 120 outside the insulating support layer 110. As shown in FIGS. 1, 2 and 9 to 11, the auxiliary umbrella skirt 120 is wrapped on the outside of the insulating support layer 110.

In steps a1 and a2, the insulating support layer 110 may both have a mesh shape. Specifically, the insulating support layer 110 may be a mesh element such as nylon mesh, glass fiber mesh, or resin mesh. The preparation technology of similar mesh elements is mature, low cost, wide source, and easy to obtain.

b. Seal the upper and lower ends of the auxiliary umbrella skirt 120 and the insulator 20 and the openings respectively. The upper and lower ends of the auxiliary umbrella skirt 120 connecting with the rod body 210 have gaps. In this step, as shown in Figures 9 to 11, the two gaps are sealed to isolate the receiving cavity 121 from the outside at the two gaps. In the subsequent step c, a vacuum can be formed in the receiving cavity 121. Specifically, the vacuum tape 30 is used to seal the two gaps, so as to isolate the adhesive 130 in the receiving cavity 121 from the outside, and extend the life of the adhesive 130. The vacuum tape 30 can seal the above-mentioned gap by winding multiple turns on the rod body 210, which is easy to implement.

Referring to FIGS. 9 to 11, the sealing at the opening 121 is realized by the filling body 123. Specifically, the filling body 123 is filled into the opening 122, and the filling body 123 and the auxiliary umbrella skirt 120 are combined into one body using a heating vulcanization process. In other embodiments, the filling body 123 may be adhered to the opening 122 with an adhesive to achieve sealing, or the vacuum tape 30 may be used for bonding and sealing.

In this embodiment, as shown in FIGS. 4 to 6, fan-shaped recessed areas 128 are provided on both sides of the opening 122. The recessed areas 128 are grooves with a certain depth. The filling body 123 is filled in the recessed area 128, and the filling body 123 The shape and thickness of φ are correspondingly matched with the recessed area 128, and the outer surface of the auxiliary shed 120 is flush after filling, and the effect after filling is shown in Figs. 9-11. Specifically, the filling body 123 is a preformed silicone rubber sheet, which is bonded in the recessed area 128 by an adhesive.

In other embodiments, the opening 122 is only a straight seam along the radial direction of the auxiliary umbrella skirt 120. After the main umbrella skirt 220 is placed in the receiving cavity 121, no filling body is required, and the auxiliary umbrella skirt 120 at the opening 122 is directly inserted. It can be glued together; or the shape of the opening 122 and the filling body 123 can be non-fan shapes, straight bars with the same width, etc.; or the filling body 123 can also be raw rubber, which is preformed to match the shape of the recessed area 128 During installation, the opening 122 is closed by high temperature vulcanization and fixing in the recessed area 128. Here, there is no specific restriction on the shape of the opening 122 or the filling body 123, as long as the auxiliary umbrella skirt 120 can be closed in cooperation with each other in the circumferential direction.

c. Utilize the second through hole 125 to vacuum the receiving cavity 121 so that the adhesive 130 enters the receiving cavity 121 from the first through hole 124 and fills the receiving cavity 121. As shown in Figures 2 and 3, the first through hole 124 is used as a glue injection port, and the second through hole 125 is used as a vacuum hole, that is, glue is injected by means of vacuum negative pressure to complete the injection of glue into the receiving cavity 121. Steps of the agent 130. It can be understood that in this step, the injected adhesive 130 is in a non-cured state and has fluidity.

Specifically, this step c includes sub-steps:

c1. Connect the first pipe 1261 to the first through hole 124, and immerse the first pipe 1261 in the adhesive 130. As shown in FIG. 2, after the connection of the first pipe 1261 is completed, the first pipe 1261 is extended into the container containing the adhesive 130. The first pipeline 1261 may be equipped with a control valve 12611 to close or open the first pipeline 1261.

c2. Connect the second through hole 125 to the vacuum pump 1263 through the second pipe 1262, as shown in FIG. 2.

In step c2, a semi-permeable membrane 1251 is provided in the second through hole 125 or the second pipe 1262. The semi-permeable membrane 1251 is a film that allows air to pass through but does not allow the adhesive 130 to pass, so that the adhesive 130 will not overflow from the receiving cavity 121 during subsequent vacuuming, thereby saving the adhesive 130 and avoiding considering bonding The agent 130 is discharged from the second pipe 1262.

c3. Utilize the vacuum pump 1263 to vacuum the receiving chamber 121.

Further, step c3 specifically includes:

Close the control valve 12611 of the first pipeline 126;

Vacuum, so that a vacuum of 1000 Pa is formed in the receiving cavity 121;

The control valve 12611 is opened, so that the adhesive 130 enters the receiving cavity 121 from the first pipe 1261 under the action of negative pressure. Through the above operations, the adhesive 130 quickly enters and fills the receiving cavity 121.

In step c, the adhesive 130 filled into the receiving cavity 121 undergoes a de-bubbling treatment in advance, so that there are no air bubbles in the adhesive 130 that affect the electrical performance of the main umbrella skirt 220. The viscosity range of the adhesive 130 is 50mPa·s～1000mPa·s. The fluidity of the adhesive 130 in this viscosity range is good, which is good for filling the containing cavity 121 quickly and ensuring that the adhesive 130 can be evenly distributed in the containing cavity 121 . After being evacuated, the vacuum degree in the receiving cavity 121 is less than or equal to 1000 Pa. After reaching such a vacuum degree, a negative pressure environment is formed in the cavity, which is beneficial to the implementation of the vacuum injection method.

In one embodiment, in step c, the insulating support layer 110 used includes a plurality of support units arranged at intervals on the surface of the main umbrella skirt 220, so when the vacuum negative pressure glue injection, the adhesive 130 fills the space between the adjacent support units Fill the gap between the support unit and the inner surface of the auxiliary shed 120, and fill the gap between the support unit and the outer surface of the corresponding part of the main shed 220. In this way, the auxiliary shed 120 and the main shed 220 are firmly combined.

In another embodiment, in step c, the insulating support layer 110 is in the shape of a mesh. During vacuum negative pressure injection, the adhesive 130 fills the mesh of the insulating support layer 110 and the insulating support layer 110 and the auxiliary umbrella skirt 120. The gap between the inner surfaces and the gap between the outer surface of the corresponding part of the insulating support layer 10 and the main umbrella skirt 220 is filled. In this way, multiple bonding points are formed between the net-shaped insulating support layer 110 and the auxiliary shed 120, and multiple bonding points are formed between the insulating support layer 11 and the main shed 220, which improves the reliability of bonding. .

d. Block the first through hole 124 and the second through hole 125 respectively. As shown in Figures 1 and 12, the adhesive 130 fills the accommodating cavity 121 and stops vacuuming, removes the first pipe 126 and the second pipe 1262, and then uses an insulating seal plug 40 to block the first through hole 124 and the second The two through holes 125 are respectively sealed to isolate the adhesive 130 in the accommodating cavity 121 from the outside. The effect after the sealing is shown in FIG. 1, so that the adhesive 130 is not affected by environmental factors. The insulating plug 40 adopts a rubber plug or other elastic plugging body that is elastic and easy to insert into the auxiliary umbrella skirt 120.

In the method for installing the auxiliary umbrella according to the embodiment of the present invention, after the auxiliary umbrella 10 is installed on the insulator 20, the adhesive 130 is filled with a vacuum negative pressure method, which has the advantage of high efficiency, is suitable for batch installation, and can install the The air is completely exhausted, so that the adhesive 130 can quickly fill the receiving cavity 121. After the adhesive 130 is cured, the auxiliary umbrella 10 and the insulator 20 are firmly connected.

Further, when the surface of the main umbrella skirt 220 is covered with a layer of insulating support layer 110 and then the auxiliary umbrella skirt 120 is put on, the insulating support layer 110 can ensure that the main umbrella skirt 220 and the auxiliary umbrella skirt 120 can form a stable In the glue injection gap, when the adhesive 130 is filled with a vacuum negative pressure method, enough adhesive 130 can be filled to ensure firm bonding and increase the anti-pollution flashover, ice flash, and rain flash resistance of the insulator 20. Specifically, the insulating support layer 110 covers the surface of the main umbrella skirt 220 and is connected to the main umbrella skirt 220 as a whole by the adhesive 130; the auxiliary umbrella skirt 120 is wrapped on the outside of the insulating support layer 110 and is connected by the adhesive 130 It is connected with the insulating support layer 110 and the main umbrella skirt 220 as a whole.

After the step d, the method for installing the auxiliary umbrella of the embodiment of the present invention further includes the following steps:

e. A sealant is further arranged on the vacuum tape 30 and cured to form a sealant layer. That is, a sealant layer is further provided on the vacuum tape 30, and the sealant may be RTV (Room Temperature Vulcanized Silicone Rubber) or other resin glue that can be cured at room temperature to improve the sealing effect.

Or also include steps:

e. Remove the vacuum tape 30; use sealant to seal the upper and lower ends of the auxiliary umbrella skirt 120 where the insulator 20 is connected. That is, sealant is used to seal the upper and lower ends of the auxiliary umbrella skirt 120 and the insulator 20. The sealant has a better combination with the auxiliary umbrella skirt 120 and the insulator 20, and the three are integrated to provide a better sealing effect.

The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, they should It is considered as the range described in this specification.

The above examples only express several implementation modes of the present invention, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

An auxiliary umbrella is installed on an insulator, the insulator includes a plurality of main umbrella skirts, and is characterized in that the auxiliary umbrella includes:

The insulating support layer covers the surface of the main umbrella skirt and is connected to the main umbrella skirt by an adhesive as a whole; and

The auxiliary umbrella skirt is wrapped on the outside of the insulating support layer, and is connected to the insulating support layer and the main umbrella skirt by an adhesive as a whole.
The auxiliary umbrella according to claim 1, wherein the insulating support layer has a mesh shape, and the grid of the insulating support layer is filled with the adhesive.
The auxiliary umbrella according to claim 1, wherein the insulating support layer is an integral structure.
The auxiliary umbrella according to claim 1, wherein the insulating support layer at least completely covers the surface of a single piece of the main umbrella skirt, and the auxiliary umbrella skirt completely covers at least a single piece of the main umbrella skirt.
The auxiliary umbrella according to claim 4, wherein the inner surface of the auxiliary umbrella skirt forms a receiving cavity, the main umbrella skirt is integrally received in the receiving cavity, and the shape of the receiving cavity is consistent with that of the The outer surface of the corresponding part of the insulator covered by the receiving cavity has the same shape.
The auxiliary umbrella according to claim 5, wherein the auxiliary umbrella skirt is a silicone rubber umbrella skirt, the auxiliary umbrella skirt is provided with an opening along the radial direction, and the opening is used to open the auxiliary umbrella skirt and The main umbrella skirt is incorporated into the containing cavity.
The auxiliary umbrella according to claim 1, wherein the insulating support layer includes a plurality of support units arranged on the surface of the main umbrella skirt at intervals, and the gap between adjacent support units is filled with the adhesive Adhesive.
The auxiliary umbrella according to claim 1, wherein the gap between the outer surface of the main umbrella skirt and the inner surface of the auxiliary umbrella skirt is uniform everywhere.
The auxiliary umbrella according to claim 1, wherein the outer surface of the auxiliary umbrella skirt is provided with a first through hole and a second through hole, and the first through hole and the second through hole are both connected to the The inner cavity of the auxiliary umbrella skirt surrounding the insulating support layer is connected.
The auxiliary umbrella according to claim 9, wherein a semi-permeable membrane is provided in the first through hole or the second through hole.
The auxiliary umbrella according to claim 1, wherein the insulator further comprises a rod body, a plurality of the main umbrella skirts extend outward from the rod body, and a vacuum tape is provided between the auxiliary umbrella skirt and the rod body, The vacuum tape seals the gap between the auxiliary umbrella skirt and the rod body.
An auxiliary umbrella installation method is used to install the auxiliary umbrella on an insulator, the insulator includes a plurality of main umbrella skirts, the auxiliary umbrella includes an auxiliary umbrella skirt covering at least a single piece of the main umbrella skirt, so The auxiliary umbrella skirt is provided with an opening in the radial direction, and its inner surface encloses a receiving cavity for accommodating the main umbrella skirt. Hole; characterized in that the method includes the following steps:

a. Wrap a layer of insulating support layer on the main umbrella skirt, and cover the auxiliary umbrella skirt outside the insulating support layer;

b. Seal the upper and lower ends of the auxiliary umbrella skirt and the insulator and the opening respectively;

c. Utilize the second through hole to vacuum the containing cavity, so that the adhesive enters the containing cavity from the first through hole and fills the containing cavity;

d. Blocking the first through hole and the second through hole respectively.
The method according to claim 12, wherein the insulating support layer has a mesh shape, and in step c, the adhesive fills the mesh of the insulating support layer, and fills the insulating support layer The gap between the inner surface of the auxiliary shed and the gap between the insulating support layer and the outer surface of the corresponding part of the main shed is filled.
The method according to claim 12, wherein the step c comprises:

c1. Connect a first pipe to the first through hole, and immerse the first pipe in the adhesive;

c2. Connect the second through hole to a vacuum pump through a second pipe;

c3. Utilize the vacuum pump to vacuum the receiving cavity.
The method according to claim 14, wherein in the step c2, a semi-permeable membrane is provided on the second through hole or in the second pipe.
The method according to claim 14, wherein the step c3 specifically comprises:

Closing the control valve of the first pipeline;

Vacuuming, so that a vacuum degree less than or equal to 1000 Pa is formed in the receiving cavity;

The control valve is opened, so that the adhesive enters the containing cavity from the first pipe under the action of negative pressure.