阅读说明：本技术 一种户外柱上真空开关设备的密封结构 (Sealing structure of outdoor column vacuum switch equipment ) 是由 丁立群 吴学海 于 2021-02-24 设计创作，主要内容包括：本发明公开了一种户外柱上真空开关设备的密封结构,包括外壳体板,所述外壳体板上设有焊接轴承座,所述焊接轴承座上设有多个螺孔,多个所述螺孔通过紧固螺钉经密封厚胶垫进行固定有转动轴套,所述转动轴套为筒形结构,所述转动轴套内壁上通过一体铸造有环形凸块,在靠近所述环形凸块位置从里向外对称设有一个骨架油封和一个滚珠轴承。本发明阻断了水汽进入电力开关设备内部的渠道,杜绝了气温降低且湿度较大时极易在电力开关设备壳体内部形成的凝露的情况。同时加强了整个连锁动作的可靠性,即使在很长时间都未有操作的情况下,依旧保持旋转机构的输入、输出不卡涩。(The invention discloses a sealing structure of outdoor column vacuum switch equipment, which comprises an outer shell plate, wherein a welding bearing seat is arranged on the outer shell plate, a plurality of screw holes are arranged on the welding bearing seat, a rotating shaft sleeve is fixed on the plurality of screw holes through a thick sealing rubber pad through fastening screws, the rotating shaft sleeve is of a cylindrical structure, an annular convex block is integrally cast on the inner wall of the rotating shaft sleeve, and a framework oil seal and a ball bearing are symmetrically arranged at the position close to the annular convex block from inside to outside. The invention blocks the channel for the water vapor to enter the power switch equipment, and avoids the condition of condensation which is easily formed in the shell of the power switch equipment when the temperature is reduced and the humidity is higher. Meanwhile, the reliability of the whole interlocking action is enhanced, and even under the condition that no operation exists for a long time, the input and the output of the rotating mechanism are still kept not to be jammed.)

1. A sealing structure of an outdoor column-mounted vacuum switch device comprises an outer shell plate (5), and is characterized in that: be equipped with welding bearing frame (4) on dustcoat board (5), be equipped with a plurality of screws on welding bearing frame (4), it is a plurality of the screw is fixed with rotation axle sleeve (1) through fastening screw (6) sealed thick cushion (3), rotation axle sleeve (1) is the tubular structure, it has annular lug to rotate through integrated casting on axle sleeve (1) inner wall, is being close to annular lug position from inside to outside symmetry is equipped with a skeleton oil blanket (2) and a ball bearing (8).

2. A sealing structure of an outdoor vacuum column switching device according to claim 1, characterized in that: the outer diameters of the framework oil seal (2) and the ball bearing (8) are matched with the inner diameter of the rotating shaft sleeve (1) and then are sleeved on the rotating shaft (7), and the upper edge of the rotating shaft sleeve (1) is provided with a limiting hole.

3. A sealing structure of an outdoor vacuum column switching device according to claim 1, characterized in that: the sealing thick rubber gasket (3) enables the compression amount to be larger than or equal to 1.5mm, and the axial sealing effect is ensured.

4. A sealing structure of an outdoor vacuum column switching device according to claim 2, characterized in that: the rotating shaft (7) is provided with two sections, and the diameter of the upper part of the rotating shaft is larger than that of the lower part of the rotating shaft, so that the rotating shaft sleeve (1) is limited.

Technical Field

The invention belongs to the technical field of power supply equipment, and particularly relates to a sealing structure of an outdoor column vacuum switch device.

Background

At present, a safety power grid is built at high quality, and power grid safety events caused by equipment quality occur frequently in recent years. The key of improving the safe operation level of the power grid is to enhance the efficient management of the power equipment and control the quality of the network access equipment from the source.

The sealing of the conventional outdoor column vacuum switch equipment mainly adopts a mode of pressing and sealing a rubber sealing plate to seal the surrounding environment,

the sealing of most equipment on the market at present is shown in figure 1, and the mode is marginalized sealing to a certain extent in normal climate, but cannot be completely sealed in severe environment, such as high temperature, high humidity and large day and night temperature difference, and hidden danger is easily left on the stable operation of the set of equipment. The sealing structure comprises a rotating copper sleeve 1, a radial sealing O-shaped ring 2, a welding bearing seat 3, an outer shell plate 4, a fastening screw 5, a sealing thin gasket 6, a rotating shaft 7, and axial and radial sealing between the rotating shaft and the shell mainly through 6 and 2. The sealing mode can only play a role in sealing to a certain extent, and the main defects are as follows:

1) the mode of compressing the sealing rubber plate is not limited by a limit position, and the sealing effect of the sealing rubber plate is directly fastened and pressed on the end face at the artificial will or the operation hand feeling; the sealing effect of each equipment has great difference, belongs to the installation defect in whole quality management and control.

2) The hole and the shaft are in clearance fit with the compression space of the O-shaped ring in a rotating fit mode, so that the friction loss of the O-shaped ring is uneven, and the sealing performance is reduced.

3) The main defects of the sealing mode of the O-shaped ring are that the use of inferior materials can cause coking, cracking, swelling, deformation, crushing and the like; the coking and cracking of the O-shaped ring are mostly influenced by high temperature, the surface close to the medium is coked, the surface close to the moving ring and the static ring is coked when the temperature of the medium is too high or the medium flows unsmoothly, and the surface close to the moving ring and the static ring is coked and is caused by sealing friction. The cracking of the O-shaped ring is also caused by the O-shaped ring removing chemical substances, being irradiated by radiation, ultraviolet rays, having long storage period, being heated and luminous and the like.

Disclosure of Invention

The invention aims to provide a sealing structure of outdoor column-mounted vacuum switch equipment, which solves the following problems of distribution network column-mounted switch equipment caused by the sealing problem: 1) the spring operating mechanism is rusted, stuck and stuck to cause the refusing and misoperation of equipment; 2) the secondary wiring terminal has the hidden trouble of causing the faults of various measurement, control and signal loops due to short circuit and grounding caused by condensation; 3) due to poor contact caused by corrosion, each wiring terminal generates open-circuit faults in each secondary circuit, and great hidden danger is easily generated on the stable operation of the switch equipment; and the like.

The technical scheme adopted by the invention is as follows:

the utility model provides an outdoor column vacuum switchgear's seal structure, includes the shell body board, be equipped with the welding bearing frame on the shell body board, be equipped with a plurality of screws on the welding bearing frame, it is a plurality of the screw is fixed with the rotation axle sleeve through sealed thick cushion through fastening screw, the rotation axle sleeve is the tubular structure, it has annular lug to rotate through integrative casting on the axle sleeve inner wall, is being close to annular lug position from inside to outside symmetry is equipped with a skeleton oil blanket and a ball bearing.

The outer diameters of the framework oil seal and the ball bearing are matched with the inner diameter of the rotating shaft sleeve and then are sleeved on the rotating shaft, and the upper edge of the rotating shaft sleeve is provided with a limiting hole.

The thick rubber sealing pad enables the compression amount to be larger than or equal to 1.5mm, so that the axial sealing is realized.

The rotating shaft is provided with two sections, and the diameter of the upper part of the rotating shaft is larger than that of the lower part of the rotating shaft, so that the rotating shaft sleeve is limited.

Compared with the prior art, the invention has the technical effects that:

the mechanical sealing is a mode of converting the sealing structure of the protruding shaft and the static component from the radial contact and the axial contact of the packing by the sealing design of the mechanical layer, and has the advantages that:

1. the two contact planes have higher fitting degree.

2. After the plane is worn, the plane can be automatically compensated.

3. The runout of the rotating shaft has less influence on the plane and can maintain good contact.

4. The plane processing selects the material with very wear resistance and very hardness.

5. The pressing force of the two planes can be accurately controlled.

Drawings

FIG. 1 is a schematic view of a prior art conventional seal structure as referred to in the background of the application;

FIG. 2 is a schematic diagram of the overall structure provided by the embodiment of the present application;

FIG. 3 is a schematic diagram of a connection of an embodiment of the present application;

wherein, 1, rotating the axle sleeve; 2. framework oil seal; 3. sealing the thick rubber cushion; 4. welding a bearing seat; 5. an outer housing panel; 6. fastening screws; 7. a rotating shaft; 8. ball bearings.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Failure of a seal can present the following serious hazards:

1. sealing measures fail and can form water drop condensation, and the water drop condensation is attached to metal and plastic parts inside a shell of the power switch equipment, and the condensation formed on the secondary wiring terminal row corrodes metal conducting parts on the terminal row, so that alternating current and direct current short circuits or grounding are easily caused after the corrosion is heavy or other impurities are mixed, and great harm is caused to the stable operation of the power switch equipment.

2. Condensation formed on the switch or actuator can corrode metal components within the mechanism, affecting the useful life of the mechanism. Even cause the mechanism to block because of the corrosion, lead to the switch when deciliter, the mechanism can not move in place, if consequently make switch sound contact divide slowly and close, then can cause very big electric power accident, especially the switch corrosion phenomenon can be more serious when not operating for a long time.

The embodiment of the application provides a seal structure of outdoor column vacuum switchgear, including shell plate 5, be equipped with welding bearing frame 4 on shell plate 5, be equipped with a plurality of screws on welding bearing frame 4, it is a plurality of the screw is fixed with rotation axle sleeve 1 through 6 sealed thick cushion 3 of fastening screw, rotation axle sleeve 1 is the tubular structure, it has annular lug through integrative casting on 1 inner wall of rotation axle sleeve, is being close to annular lug position from the inside outward symmetry is equipped with a skeleton oil blanket 2 and a ball bearing 8.

The outer diameters of the framework oil seal 2 and the ball bearing 8 are matched with the inner diameter of the rotating shaft sleeve 1 and then are sleeved on the rotating shaft 7, and the upper edge of the rotating shaft sleeve 1 is provided with a limiting hole; the radial seal adopts a double-framework oil seal form, has two protection measures and can ensure the radial seal effect.

The sealing thick rubber pad 3 ensures that the compression amount is more than or equal to 1.5mm, and ensures the axial sealing effect.

The rotating shaft 7 is provided with two sections, and the diameter of the upper part of the rotating shaft is larger than that of the lower part of the rotating shaft, so that the rotating shaft sleeve 1 is limited. The hole and shaft fit ball bearings at both ends to ensure the coaxiality of the rotating member and the uniform friction loss of the sealing member.

The working principle of the invention is as follows: the main switch position output interlocking shaft radial seal, the manual energy storage input interlocking shaft radial seal, the manual on/off operation input shaft radial seal interlock, the energy storage position indicating shaft radial seal interlock and the main shell seal. The channel that steam got into power switchgear inside has mainly been blocked, has stopped the condition of the condensation that very easily forms in power switchgear casing when temperature drops and humidity is great. Meanwhile, the reliability of the whole interlocking action is enhanced, and even under the condition that no operation exists for a long time, the input and the output of the rotating mechanism are still kept not to be jammed.

The invention is described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the above-described embodiments, and it is within the scope of the invention to adopt such insubstantial modifications of the inventive method concept and solution, or to apply the inventive concept and solution directly to other applications without modification.