阅读说明：本技术 气体绝缘高压电器用隔板法兰结构及其加工方法 (Partition plate flange structure for gas insulated high-voltage electric appliance and processing method thereof ) 是由 陈晓凌 陈晓鸣 刘明矿 李松恩 于 2021-10-08 设计创作，主要内容包括：本申请提供了一种气体绝缘高压电器用隔板法兰结构及其加工方法。本申请利用镗刀在隔板法兰的内周加工出法兰容纳腔,并进一步利用铣刀横向在法兰容纳腔的外侧边缘切削出若干弧形凹槽作为外沿容纳腔。由此,本申请可通过普通铣刀直接将刀身侧部伸入隔板法兰中,加工获得较小尺寸的隔板法兰,降低对隔板法兰加工刀具的限制。并且,本申请还可直接通过隔板法兰前后端面的弧形凹槽容纳绝缘介质,限制绝缘介质和中心嵌件在隔板法兰内部转动,通过法兰容纳腔限制绝缘介质和中心嵌件沿隔板法兰轴向前后活动,因此,可有效保证对中心嵌件的绝缘隔离效果,从而保证气体绝缘高压电器中高压元件能够稳定运行。(The application provides a partition plate flange structure for a gas insulated high-voltage electric device and a processing method thereof. The flange accommodating cavity is machined in the inner periphery of the partition plate flange by the aid of the boring cutter, and the outer side edge of the flange accommodating cavity is further transversely cut into a plurality of arc-shaped grooves serving as outer edge accommodating cavities by the aid of the milling cutter. From this, this application accessible ordinary milling cutter directly stretches into the baffle flange with the blade lateral part in, the processing obtains the baffle flange of less size, reduces the restriction to baffle flange processing cutter. And, this application still can directly hold insulating medium through the arc recess of baffle flange front and back terminal surface, and restriction insulating medium and central inserts rotate in the baffle flange is inside, holds the chamber through the flange and restricts insulating medium and central inserts and move around along the baffle flange axial, consequently, can effectively guarantee the insulating isolation effect to central inserts to guarantee that high voltage component can the steady operation in the gas insulated high voltage apparatus.)

1. The utility model provides a baffle flange structure for gas-insulated high-voltage electric appliance which characterized in that includes:

a flange accommodating cavity (101) which is arranged on the inner periphery of the partition plate flange and is used for limiting the insulating medium in the partition plate flange to move along the axial direction;

and the outer edge accommodating cavity (122) is arranged on the inner periphery of the partition flange and is positioned on the outer edge of the flange accommodating cavity (101) and used for limiting the insulating medium in the partition flange to move along the circumferential direction.

2. The diaphragm flange structure for a gas insulated high voltage electric device according to claim 1, wherein an edge of the flange receiving chamber (101) is formed with a boss connected to a connection end face of the diaphragm flange;

the outer edge containing cavity (122) is formed in a flange containing cavity (101) edge boss.

3. The separator flange structure for gas insulated high-voltage electric appliances according to claim 2, wherein the outer edge receiving chamber (122) is formed by recessing an inner peripheral edge of the separator flange and is spaced apart from at least one side of the flange receiving chamber (101) in a circumferential direction of the inner peripheral edge.

4. The separator flange structure for gas insulated high-voltage electric appliances according to claim 2, wherein the flange receiving chamber (101) is formed by recessing an inner circumferential surface of the separator flange and is distributed in a ring shape along a circumferential direction of the inner circumferential surface.

5. The diaphragm flange structure for a gas insulated high voltage electric device according to claim 3, wherein the radius of the outer edge receiving cavity (122) is smaller than the radius of the flange receiving cavity (101).

6. The partition flange structure for gas insulated high-voltage electric appliances according to any one of claims 1 to 5, wherein the outer edge receiving chamber (122) is formed by directly cutting the outer edge of the flange receiving chamber (101) by a milling cutter (4);

the outer edge accommodating cavity (122) is formed by respectively extending the front end and the rear end of the flange accommodating cavity (101) to the end faces of the front side and the rear side of the partition plate flange.

7. The separator flange structure for gas insulated high-voltage electrical apparatus according to claim 6, wherein the inside of the outer edge accommodating chamber (122) and the flange accommodating chamber (101) is connected with the insulating medium (12) and the center insert (13), wherein the outer peripheral edges of the insulating medium (12) are respectively embedded into the outer edge accommodating chamber (122) and the flange accommodating chamber (101) at the same time, and the center insert (13) is fixedly connected inside the insulating medium (12).

8. A processing method of a partition flange structure for a gas insulated high voltage electric machine is characterized by comprising the following steps:

the boring cutter extends into the partition plate flange, and is driven to circumferentially process and open a flange accommodating cavity (101) along the inner circumferential surface of the partition plate flange;

the cutter head of the milling cutter (4) extends into the partition flange, a plurality of outer edge accommodating cavities (122) are directly formed in the outer edge of the flange accommodating cavity (101) along the inner circumference of the partition flange in a cutting mode, and the cutter head clamp of the milling cutter is located outside the partition flange in the cutting process.

9. The method for processing a flange structure of a partition board for a gas insulated high voltage apparatus according to claim 8, wherein the milling cutter (4) is rotated along the outer circumference of the flange receiving cavity (101) to cut the inner circumferential edge of the partition board flange to stagger the arc-shaped inner walls of the outer edge receiving cavities (122) when the outer edge receiving cavities (122) are processed.

10. The method for processing the partition flange structure for the gas insulated high-voltage electric appliance according to claim 8, wherein when the flange accommodating cavity (101) is processed, the partition flange rotates on its own circumference, the boring cutter moves from inside to outside along the inner circumference of the partition flange in the radial direction to cut the middle part of the inner circumference of the partition flange, and the flange accommodating cavities (101) are annularly distributed along the circumferential direction of the inner circumference.

Technical Field

The application relates to the field of high-voltage electrical equipment, in particular to a partition plate flange structure for a gas-insulated high-voltage electric device and a processing method thereof.

Background

The high voltage components of a gas insulated high voltage electrical apparatus need to be supported inside the housing by a partition in a manner similar to that shown in fig. 1. The partition is made of an insulating material, and has an outer edge in contact with the housing and a middle portion in contact with the high-voltage element. Generally, to ensure the insulation performance, the relative displacement between the housing and the high voltage component should be as small as possible. The positional relationship among the high voltage conductor, the housing and the partition is shown in fig. 1.

The separator generally consists of three parts: the baffle plate comprises a central insert positioned in the baffle plate, an insulating medium surrounding the periphery of the central insert and a baffle plate flange fixedly supported on the periphery of the insulating medium. The central insert and the partition flange are usually made of metal, and the main component of the insulating medium is an epoxy resin material. The three components are cast and molded to form a whole. Because the epoxy resin has certain contractibility in the process of casting molding, the molded epoxy resin can be bonded with the central insert, a small gap can be generated between an insulating medium of the epoxy resin and the inner surface of the partition plate flange due to material contraction, the small gap can cause the freedom degree of relative movement between the epoxy resin and the flange, and the relative position relation between the shell and the central insert is influenced.

In order to limit the radial or axial relative movement of the insulating medium of the epoxy resin relative to the flange, an annular groove is usually designed in the middle of an inner ring of a partition plate flange in the prior art, and the annular groove is used for realizing the clamping connection with the insulating medium; in order to limit the degree of freedom of the epoxy resin insulation medium rotating along the circumference of the flange, in the prior art, a plurality of rectangular grooves are further formed in the bottom of the annular groove through a milling cutter, and the periphery of the insulation medium is clamped and fixed through the rectangular grooves. Therefore, after casting molding, the annular groove and the rectangular groove at the bottom of the annular groove are filled with epoxy resin to form the annular bulge and the rectangular bulges which are structurally matched with the annular bulge and the rectangular bulges. The grooves on the inner side of the partition plate flange are matched with the protrusions on the outer side of the epoxy resin insulating medium, so that the epoxy resin and the flange are limited to generate small-sized relative displacement and rotation.

In the prior art, when machining each groove inside a partition flange, the common steps are as follows:

firstly, the annular groove is processed and formed along the axial direction by using a boring cutter, then a milling cutter and a cutter holder thereof extend into the flange, and a rectangular groove is further processed and formed at the bottom of the annular groove along the radial direction.

However, for the partition board with a smaller flange diameter, the common milling cutter and the clamp thereof cannot enter the flange to perform rectangular groove processing. Thus, the existing rectangular groove design increases the difficulty of manufacturing and machining and requires the use of more elaborate and miniaturized milling cutter heads.

Disclosure of Invention

This application is to prior art's not enough, provides a baffle flange structure for gas-insulated high-voltage electric appliance and processing method thereof, and this application utilizes conventional size's milling cutter to stretch into baffle flange internal week along the axial, holds chamber lateral wall cut directly at the flange and forms outer along holding the chamber, and the terminal surface edge of holding the chamber and connecting insulating medium through this outer edge provides circumference spacing, simplifies baffle flange processing technology, reduces the requirement of small-size baffle flange to processing tool bit and tool bit anchor clamps size. The technical scheme is specifically adopted in the application.

First, in order to achieve the above object, there is provided a diaphragm flange structure for a gas insulated high voltage electric device, including: the flange accommodating cavity is arranged on the inner periphery of the partition plate flange and is used for limiting the insulating medium in the partition plate flange to move along the axial direction; and the outer edge accommodating cavity is arranged on the inner periphery of the partition plate flange and is positioned on the outer edge of the flange accommodating cavity and used for limiting the insulating medium in the partition plate flange to move along the circumferential direction.

Optionally, the partition flange structure for a gas insulated high voltage electric device as described in any one of the above, wherein a boss connected to a connection end face of the partition flange is formed at an edge of the flange accommodating cavity; the outer edge accommodating cavity is formed in the edge boss of the flange accommodating cavity.

Optionally, the spacer flange structure for a gas insulated high voltage electric machine as described in any one of the above, wherein the outer edge accommodating cavity is formed by recessing an inner peripheral edge of the spacer flange and is distributed at least on one side of the flange accommodating cavity at intervals along a circumferential direction of the inner peripheral surface.

Optionally, the diaphragm flange structure for a gas insulated high voltage electric machine as described in any one of the above, wherein the flange receiving cavity is formed by recessing an inner circumferential surface of the diaphragm flange and is distributed in a ring shape along a circumferential direction of the inner circumferential surface.

Optionally, the diaphragm flange structure for a gas insulated high voltage electric machine according to any one of the above, wherein a radius of the outer edge accommodating cavity is smaller than a radius of the flange accommodating cavity.

Optionally, the partition flange structure for a gas insulated high voltage electric device as described in any one of the above, wherein the outer edge accommodating cavity is directly cut by a milling cutter along an outer edge of the flange accommodating cavity; the outer edge accommodating cavity is formed by respectively extending the front end face and the rear end face of the flange accommodating cavity of the flange to the front end face and the rear end face of the partition plate flange.

Optionally, the partition flange structure for a gas insulated high voltage electric device as described in any of the above, wherein the inside of the outer edge accommodating cavity and the flange accommodating cavity is connected with an insulating medium and a central insert, wherein the peripheral edge of the insulating medium is respectively embedded into the outer edge accommodating cavity and the flange accommodating cavity at the same time, and the central insert is fixedly connected inside the insulating medium.

Meanwhile, in order to achieve the above object, the present application also provides a method for processing a spacer flange structure for a gas insulated high voltage device, which comprises the steps of: the boring cutter extends into the partition plate flange, and is driven to circumferentially process and open a flange accommodating cavity along the inner circumferential surface of the partition plate flange; the cutter head of the milling cutter extends into the partition plate flange, a plurality of outer edge containing cavities are directly formed in the outer edge of the flange containing cavity along the inner circumference of the partition plate flange in a cutting mode, and the cutter head clamp of the milling cutter is located outside the partition plate flange in the cutting process.

Optionally, in the method for processing a partition flange structure for a gas insulated high-voltage electrical apparatus, when the outer edge accommodating cavity is processed, the milling cutter rotates along the periphery of the flange accommodating cavity, cuts the edge of the inner circumferential surface of the partition flange, and staggers the arc-shaped inner walls of the outer edge accommodating cavities.

Optionally, in the method for processing a partition flange structure for a gas insulated high-voltage electrical apparatus, when the flange accommodating cavity is processed, the partition flange rotates circumferentially, the boring cutter moves radially from inside to outside along the inner circumference of the partition flange, the middle of the inner circumferential surface of the partition flange is cut, and the flange accommodating cavities distributed annularly are formed along the circumferential direction of the inner circumferential surface.

Advantageous effects

This application utilizes the boring cutter to process out the flange at the interior circumference of baffle flange and holds the chamber to further utilize milling cutter to stretch into baffle flange interior circumference along the baffle flange axial, transversely hold the outside edge cutting in the chamber at the flange and go out a plurality of arc recesses as outer edge and hold the chamber. From this, during this application accessible ordinary milling cutter directly stretches into the baffle flange with the blade side, the baffle flange of processing smaller size reduces the restriction to baffle flange processing cutter. And, this application still can directly hold insulating medium through the arc recess of baffle flange front and back terminal surface, and restriction insulating medium and central inserts rotate in the baffle flange is inside, holds the chamber through the flange and restricts insulating medium and central inserts and move around along the baffle flange axial, consequently, can effectively guarantee the insulating isolation effect to central inserts to guarantee that high voltage component can the steady operation in the gas insulated high voltage apparatus.

This application is passed through milling cutter and is followed the baffle flange axial, and the direct outside edge that holds the chamber at the flange transversely cuts out the arc recess and holds the chamber as outer following. Therefore, in the process of pouring the insulating medium, the outer edge of the insulating medium can enter the flange accommodating cavity and the outer edge accommodating cavity, the annular groove of the flange accommodating cavity and the arc-shaped groove of the outer edge accommodating cavity are filled with the insulating medium, and arc-shaped outer edge protruding structures attached to the arc-shaped grooves are formed on the front end face and the rear end face of the insulating medium, so that clamping is realized. After the forming, the front side wall and the rear side wall of the flange accommodating cavity surround the peripheral edge of the insulating medium along the circumferential direction to limit the insulating medium to move back and forth along the axial direction of the partition plate flange, and the connecting end surface formed between the arc-shaped groove of the outer edge accommodating cavity and the side wall of the flange accommodating cavity can abut against the arc-shaped outer edge protruding structure formed by the front end surface and the rear end surface of the insulating medium when the insulating medium rotates relative to the partition plate flange to limit the insulating medium to rotate relative to the partition plate flange. Therefore, the baffle plate flange is stably connected between the connecting end surfaces of the front shell and the rear shell 3 through the fixed connecting parts such as screws, bolts and the like, so that the center insert in the shell can be fixed, and the front and rear movement or the left and right rotation of the center insert relative to the high-pressure element in the shell is effectively limited.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application.

Drawings

The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application and not limit the application. In the drawings:

FIG. 1 is a schematic view of a flange for a gas insulated high voltage device and a connection method between the flange and a high voltage device

FIG. 2 is a schematic view of a conventional separator flange for a gas insulated high voltage apparatus;

FIG. 3 is a schematic view of a separator flange for a gas insulated high voltage electrical apparatus according to the present application;

fig. 4 is a schematic view of an insulation basin structure formed by a diaphragm flange for a gas insulated high voltage device according to the present application.

In the drawings, 1 denotes a separator; 2 denotes a high voltage element; 3 represents a housing; 11 denotes a bulkhead flange; 12 denotes an insulating medium; 13 denotes a central insert; 101 denotes a flange accommodating chamber; 102 denotes a rectangular groove; 4, a milling cutter; 5 a disc cutter; and 122, a peripheral receiving chamber.

Detailed Description

In order to make the purpose and technical solutions of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings of the embodiments of the present application. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the application without any inventive step, are within the scope of protection of the application.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

The meaning of "and/or" as used herein is intended to include both the individual components or both.

The meaning of "inside and outside" in the application means that the direction pointing to the central insert arranged inside the partition plate flange is inside, and vice versa, relative to the partition plate flange per se; and not as a specific limitation on the mechanism of the device of the present application.

The meaning of "front and back" in this application means that when the user is facing the direction of the recess of the insulating medium, the direction close to the user is front, and the direction close to the central insert at the bottom of the insulating medium is back, not the specific limitation of the mechanism of the device of this application.

The term "connected" as used herein may mean either a direct connection between components or an indirect connection between components via other components.

The terms "up, down, left, and right" as used herein refer to the user's top being up, the user's bottom being down, the user's left being left, the user's right being right, when the user is facing the direction of the depression of the insulating medium, rather than the specific limitations on the mechanism of the device of the present application.

The application provides a baffle flange 11 for gas-insulated high-voltage electrical apparatus, it is with the mode of fig. 1, set up between the connection terminal surface of two shells 3 in the front and back for connect the insulating medium 12 of fixed center inserts 13 in the shell, the connection terminal surface of cooperation shell restricts insulating medium jointly and removes, thereby guarantee to be connected steadily between center inserts 13 and the high-voltage component 2, guarantee the insulating isolation effect of insulating medium to center inserts, guarantee that the high-voltage component can the steady operation in the gas-insulated high-voltage electrical apparatus.

Referring to fig. 4, the spacer flange 11 provided in the present application may be integrally formed with the insulating medium by casting. The insulating medium 12 is shaped by a casting mold and forms a basin body which is sunken backwards, and a central insert 13 is embedded in the bottom formed by the basin body. Therefore, the insulating medium is fixedly connected between the partition flange and the central insert to form a complete partition structure. The baffle plate structure is fixedly connected with a flange connecting part arranged on the end surface of the shell 3 through a baffle plate flange on the periphery, and the central insert is limited in a cavity formed between the front shell and the rear shell, so that the central insert can be respectively and electrically connected with two high-voltage elements in the front shell and the rear shell through the front end surface and the rear end surface of the central insert to form an electric path between the high-voltage elements, and the effective transmission of a high-voltage electric signal is realized in a gas insulation environment formed by sealing the shells. The insulating medium can provide insulating isolation protection for the high-voltage element, and the reliable operation of the whole gas-insulated high-voltage electrical appliance is guaranteed.

Since the insulating medium such as epoxy resin has a certain shrinkage property during the casting molding process, the molded epoxy resin can be completely and firmly bonded with the central insert, but the epoxy resin on the periphery of the separator and the inner surface of the flange of the separator usually generate a tiny gap due to material shrinkage.

In order to limit the freedom degree of relative movement between the insulating medium and the flange partition plate caused by the tiny gap as much as possible and avoid the influence on the insulating performance of a high-voltage element in the shell due to the fact that the insulating medium moves back and forth or rotates relative to the partition plate flange, the boring cutter can extend into the inner periphery of the partition plate flange to drive the partition plate flange to rotate circumferentially, the boring cutter extends into the middle of the partition plate flange to move from inside to outside along the inner periphery of the partition plate flange along the radial direction, the middle of the inner peripheral surface of the partition plate flange is cut, flange accommodating cavities which are distributed annularly are processed along the circumferential direction of the inner peripheral surface, and the front side wall and the rear side wall of each flange accommodating cavity are abutted to the outer peripheral edge of the insulating medium, so that the axial limit of the insulating medium is realized; then, this application still can further stretch into the inside of baffle flange with the tool bit of milling cutter 4, and the edge transversely holds the outside edge in the flange of baffle and directly cuts the outer edge that forms a plurality of interval arrangement along the interior week of flange and holds the chamber 122, utilizes the outer edge that has the arc bottom to hold the outside edge that the chamber joint insulating medium front and back terminal surface, realizes spacing to insulating medium circumferential direction.

Generally, for convenient processing, this application can transversely stretch into the baffle flange inside with the direct axial level along the baffle flange of milling cutter blade and carry out the cutting process operation. Because the anchor clamps of fixed blade need not to stretch into baffle flange inner circle in milling cutter 4, its tool bit anchor clamps are located the outside of baffle flange all the time, only can realize holding the cutting of chamber 101 outside edge through the blade to the flange, and the outside edge that is excavated outside the terminal surface is inside around the baffle flange holds chamber 122, realizes the cutting operation to the work piece, consequently, the baffle flange structure that this application provided need not to reserve great stroke space in flange center through-hole position and supplies the tool bit to reciprocate from top to bottom to carry out the operation. The utility model provides a baffle flange structure, its radius as long as guarantee that the cutting tool bit is no longer than the interior radius of periphery of baffle flange, can realize the processing to the interior periphery of baffle flange. Therefore, for the baffle flange with a smaller diameter, the common milling cutter with a thinner cutter head is only needed to be selected according to the inner diameter of the flange, and the cutting processing of the inner periphery of the flange structure can be realized by matching with a universal milling cutter clamp. The milling depth and cutting range can be adjusted accordingly according to the arc size of the outer edge receiving cavity 122 matched with the partition flange. From this, this application can hold chamber 101 along the flange according to baffle flange size in the baffle flange of unidimensional front and back both ends face edge and set up the arc recess of different radians size as outer along holding the chamber, realizes fixed to insulating medium circumference's joint.

Therefore, the diameter of the milling cutter body can be selected according to the inner diameter of the partition plate flange, the flange accommodating cavity matched with the size of the partition plate flange is formed by selecting the milling cutter with the slender milling cutter body, the milling cutter with the existing small cutter head is directly matched with a universal milling cutter fixture to at least realize the cutting processing of the inner periphery of the partition plate flange with the inner diameter of about 100mm, and the processing size is far smaller than the processing diameter requirement that the milling cutter 4 is not less than 300mm under the vertical processing mode shown in the existing figure 2. Compared with the existing mode of vertically processing through a milling cutter, the horizontal cutter mode has smaller limitation on the size of the cutter head and the size of the clamp, so that the cutting and fixing effect similar to that of the cutter head of the miniature milling cutter can be realized by simply selecting the existing cutter with smaller size. Outer smooth the flange of the arc bottom surface that holds chamber 122 holds chamber 101 edge connection to the boss transition of baffle flange joint terminal surface, however, because two hookup locations that hold between the chamber are formed with certain contained angle, consequently, the arc recess still can utilize its radial degree of depth and the contained angle at edge to realize spacing joint to the arcuation outer fringe bulge structure of both ends periphery around the insulating medium, thereby pass through the arcuation outer fringe bulge structure of arc recess butt insulating medium, realize spacing to insulating medium periphery direction of rotation, realize the positioning effect the same with rectangular groove 102.

In order to ensure that the whole stress of the insulating medium is uniform and ensure that the rotation and the deviation of the insulating medium in all directions can be effectively limited by the groove structure, preferably, the inner circumferential surface of the partition plate flange is further cut by a boring cutter so that the middle part of the inner circumferential surface is inwards concave to form the flange accommodating cavities 101 which are distributed in a ring shape along the circumferential direction of the inner circumferential surface. And the outer edge accommodating cavity 122 can be cut by a milling cutter to form the outer edge accommodating cavity 122 which is recessed from the inner peripheral surface edge of the partition plate flange and is distributed on at least one side of the front and the back of the flange accommodating cavity 101 at intervals along the circumferential direction of the inner peripheral surface. In a preferred mode, the lower shell is provided with the outer edge accommodating cavities 122 of the arc-shaped groove structures which are uniformly distributed along the inner circumferential direction of the lug boss at the edge of the flange accommodating cavity 101. Therefore, once the insulating medium is subjected to relative displacement or relative rotation, the stress on the periphery of the insulating medium is uniform in all directions, the insulating medium is prevented from being separated from the original fixed position in an opposing manner, and the insulating medium is effectively prevented from being deformed or damaged due to the fact that the insulating medium bears overlarge stress in a single direction.

Referring to the left side of fig. 3, the bosses formed from the front and rear side edges of the flange accommodating chamber to the flange connecting end face of the partition plate can be cut transversely by selecting a milling cutter with a smaller diameter to match the radius of the flange accommodating chamber. The included angle formed by the connecting positions of the edges of the two grooves can be increased by arranging the milling cutter along the cutting depth of the inner periphery of the partition plate flange, and the limiting effect on the insulating medium is enhanced. Generally, the radius of the arc-shaped groove formed by the outer edge accommodating cavity 122 at least needs to be set to be smaller than the inner diameter of the annular groove of the flange accommodating cavity 101, so that discontinuous abutting included angles are formed on the front side end face and the rear side end face of the flange accommodating cavity 101, the limiting abutting of the insulating medium in the cavity is realized, and the insulating medium is prevented from sliding along the cavity.

In order to avoid the problem that the structural strength of the partition plate flange is influenced by the fact that the outer edge containing cavity 122 at the arc bottom is too deep, the cutting depth of the arc-shaped groove does not exceed the groove depth of the flange containing cavity or is close to the groove depth of the flange containing cavity 101. That is, the depth of the deepest position of the inner peripheral groove of the partition plate flange on the right side of fig. 3 is generally not more than the original groove depth of the flange accommodating cavity, and the flange accommodating cavity and the outer edge of the accommodating cavity retain a flange disc structure with enough thickness, so that the connection strength with the front end face and the rear end face of the shell can be ensured, and the limiting strength of an internal insulating medium is ensured.

In general, the specific opening position of the outer edge accommodating cavity 122 can be arbitrarily selected at the circumferential front and rear sides of the flange accommodating cavity. However, in consideration of the stress state of the insulating medium, in order to keep the stress balance of the insulating medium inside the partition plate flange as much as possible and avoid the tendency of axial deflection of the partition plate flange caused by unbalanced external stress, in an optimal implementation manner, the arc-shaped grooves may be symmetrically arranged at 4 positions of the flange accommodating cavity in the circumferential direction, which are symmetric with respect to the four quadrants, in the manner of fig. 3, and the arc-shaped grooves of the outer edge accommodating cavities 122 are arranged and located in the same radial plane, and the front and rear ends of the flange accommodating cavity 101 extend to the front and rear end faces of the partition plate flange respectively. Therefore, stress borne by the shell 3 or the central insert can be uniformly applied to the partition plate flange and the insulating medium through the two groups of completely symmetrical grooves, so that the connection limiting structure is guaranteed to be uniformly stressed as much as possible, and deflection caused by unbalanced stress is avoided.

The outer edge accommodating cavities 122 on the front side and the rear side of the flange accommodating cavity 101 can be symmetrically arranged in pairs or staggered. Under two liang of relative modes, 4 pairs of outer edge that the flange was seted up in flange holding chamber 101 circumference hold chamber 122, can communicate the flange respectively and hold the front and back both sides of chamber 101, form the chamber that holds that link up the baffle flange front and back connection terminal surface. Should hold the chamber by filling completely when insulating medium pours into a mould, form the connection structure joint that is more thick and solid and hold between chamber 101 and the outer chamber 122 of holding along the flange, can provide bigger mechanical strength from this, avoid insulating medium edge butt outer along holding chamber 122's single arcuation edge protruding structure deformation breakage and lose spacing effect.

In summary, the flange accommodating cavity 101 and the outer edge accommodating cavity 122 are formed by two sets of groove structures inside the partition flange, and the two accommodating cavities are used for accommodating and solidifying the connecting insulating medium in the pouring process so as to fix the central insert through the insulating medium. This application accessible pouring mode sets up the peripheral edge embedding of insulating medium and holds the chamber and outer edge and hold the intracavity at the flange that baffle flange inner periphery formed, and restriction insulating medium and the fixed central inserts that bonds of inside thereof are along baffle flange circumferential direction or along baffle flange axial displacement. The flange of this application holds the chamber and holds chamber simple structure along outer, and accessible milling cutter lateral wall transversely cuts the shaping, easily manufacturing to the current less radial milling cutter blade of accessible normal machine tool and conventional milling cutter anchor clamps cooperation satisfies the processing requirement of the less baffle flange of diameter.

This application is seted up the flange in the baffle flange internal periphery and is held the chamber, and both sides edge forms outer along holding the chamber along baffle flange axial horizontal cutting around the chamber is held to the flange, set up central inserts in baffle flange inboard, it is inboard to set up this central inserts assembly in the flange before the pouring of baffle insulating medium, embedding insulating medium is inside after the pouring of insulating medium, and hold the chamber with outer along holding and be connected to the baffle flange through the flange, realize fixing between flange and the insulating medium, form basin formula insulator or metal ring flange basin formula insulator that is used for gas insulation high-voltage apparatus.

This application adopts the milling cutter of horizontal direction cutting to replace the milling cutter of original vertical direction cutting, can not stretch into the inside processing of baffle flange with the supporting anchor clamps of milling cutter, can be suitable for and process the flange structure of smaller size. The application provides a flange diameter range that baffle flange structure is suitable for is wide, and the manufacturing condition who is suitable for is not high, and ordinary lathe can satisfy the manufacturing requirement.

The above are merely embodiments of the present application, and the description is specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the protection scope of the present application.