CN104269314B - Outdoor high-voltage isolating switch mechanism seals casing - Google Patents

Abstract

The present invention relates to a kind of isolating switch technical field, specifically a kind of outdoor high-voltage isolating switch mechanism seals casing, comprise box frame, chamber door, top cover and shaft coupling, box frame is provided with outwardly flange, chamber door to be buckled in outside flange with box frame for being flexibly connected, and top cover is arranged on box frame top, and shaft coupling is arranged on top cover top, shaft coupling is connected with the output shaft stretching out top cover, also comprises axle portion protector and door portion protector.The present invention is rational in infrastructure, easily manufactures, and having can effective waterproof, feature that again can be anti-dust.

Description

Mechanism sealed box for outdoor high voltage isolating switch

technical field

The invention relates to the technical field of isolating switches, in particular to a mechanism-sealed box for an outdoor high-voltage isolating switch.

Background technique

Outdoor high-voltage isolating switches in power systems are usually installed in open areas far away from residential areas, and some need to be installed in wild areas. The working environment is relatively harsh, with both sandstorms and rain and snow erosion. The requirements for various components are relatively high, and the electric operating mechanism box is used for the protection of the circuit of the equipment, the drive motor and the reducer. The box needs to have high dustproof and waterproof performance to ensure the normal and reliable operation of the drive device. The existing mechanism box is usually equipped with a hollow sealing strip at the joint between the door and the box frame for waterproofing. Although it has a certain waterproof performance, it can block the erosion of rain and snow to a certain extent. When the amount of rainwater is large, it is easy to infiltrate In the box, even water seeps into the box with sediment, and the waterproof effect is average; in addition, the traditional box has breathing holes that allow the air to circulate in the box, which has no protection against sand and dust, especially in North China and Due to the working characteristics of the mechanism box in areas with a lot of wind and sand or dust in the northwest, the mechanism box has a through hole through which the output shaft protrudes, and then a cylindrical shaft joint is placed on the through hole and outside the output shaft. To follow the rotation of the output shaft, dust or water can easily enter from the through hole between the shaft joint and the box body, especially if sand dust enters the box body of the operating mechanism, it will affect the normal operation of the internal mechanical moving parts and cause failure.

Contents of the invention

In order to overcome the above-mentioned defects, the present invention provides a mechanism-sealed box for an outdoor high-voltage isolating switch that is waterproof and dust-proof.

The technical scheme adopted in the present invention is: a mechanism sealing box for outdoor high-voltage isolating switch, including a box frame, a box door, a top cover and a shaft joint, the box frame is provided with outwardly protruding flanges, and the box door Fastened to the outer side of the flange and connected to the box frame, a sealing strip is set between the box frame and the door, the top cover is set on the upper part of the box frame, the shaft joint is set on the top cover, and the shaft joint is connected to the protruding top cover. The output shaft connection is characterized in that it also includes a shaft guard and a door guard,

The shaft protection device includes a sealing ring and a shaft sleeve. The sealing ring is a V-shaped sealing ring, that is, the sealing ring is a circular structure with a V-shaped cross section. Groove, the cross-section of the groove is V-shaped, the annular area of the lower surface of the sealing ring is smaller than the area of the upper surface, and is centered, and both sides of the sealing ring are inclined; the sleeve is cylindrical, and its The size of the inner hole corresponds to the size of the outer circle of the output shaft, and the shaft sleeve is fixedly connected to the upper part of the top cover and sleeved outside the output shaft; the lower end of the shaft joint is sleeved on the outer side of the shaft sleeve, and a groove is provided on the inner wall of the lower end of the shaft joint , the groove and the inner hole of the shaft joint form a stepped hole, and the sealing ring is arranged between the shaft sleeve and the shaft joint and in the groove of the shaft joint;

The door protection device includes a second sealing frame and an elastic sealing plate. The second sealing frame is composed of a vertical side and a horizontal side, and the cross section is a strip-like structure at right angles. The angle between the horizontal side and the vertical side is Less than 90 degrees, its vertical side is fixedly connected to the inner side of the flange on the box frame, and its horizontal side extends outwards parallel to the flange and extends out of the flange. The elastic sealing plate is a strip-shaped rectangular plate, and its length is the same as The width of the door is corresponding, and it is arranged on the inner side of the door horizontally, corresponding to the horizontal side of the second sealing frame, that is, after the door is fastened to the box frame, the sealing plate is in contact with the horizontal side, and the thickness of the sealing plate is greater than the thickness of the sealing strip; The sealing strip between the box frame and the door is a hollow sealing strip, which is fixedly connected to the outside of the flange, and the sealing strip and the flange form a first sealing frame.

The invention designs the shaft protection device and the door protection device. In the shaft protection device, a shaft sleeve is arranged on the top cover and the position where the output shaft protrudes. The shaft joint is sleeved outside the shaft sleeve. There is an annular sealing ring in between, and the section of the sealing ring is V-shaped. This structure effectively prevents dust and rainwater from entering the box from the part where the output shaft protrudes from the top cover. Especially when the shaft joint is rotating, if the dust follows After rotating between the shaft joint and the shaft sleeve, it will fall into the groove on the upper surface of the sealing ring, and at the same time be blocked by the shaft sleeve to avoid entering the inside of the box from between the output shaft and the top cover; in the door protection device, the A right-angled second sealing frame is set on the flange of the box frame, and its horizontal edge protrudes outward from the flange, and an elastic sealing plate is installed on the inner side of the door corresponding to the horizontal edge, and at the same time, it is installed outside the flange Hollow sealing strip, when the door buckle is connected to the box frame, the hollow sealing strip on the flange forms the first sealing protection, and the above-mentioned horizontal edge is squeezed and contacted with the elastic sealing plate to form the second sealing protection. The first protection effectively prevents most of the water from entering the box, and a small amount of water or sand is blocked by the second sealing protection to prevent sand, dust and water from entering the box and affecting the normal operation of the equipment.

In the present invention, both the outer circle of the shaft sleeve and the inner wall of the groove of the shaft joint are provided with limiting grooves for installing sealing rings.

A limiting groove is provided, and the two upper edges of the sealing ring are inserted into the limiting groove, which can prevent the sealing ring from moving up and down and affect the waterproof and dustproof effect of this part.

The invention has the advantages of reasonable structure, easy manufacture, complete transformation on the basis of existing products, no need to replace a new box frame, low cost, and effective waterproof and dustproof.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is an enlarged view of part A in Fig. 1 .

Fig. 3 is an enlarged view of part B in Fig. 1 .

Fig. 4 is an enlarged view of part C in Fig. 1 .

detailed description

Now in conjunction with accompanying drawing, the present invention is described further, and Fig. 1 is a kind of embodiment of the present invention, comprises box frame, box door, top cover and axle joint, and box frame is generally the framework of cuboid shape, and each face of cuboid Openings are arranged on the top, outwardly protruding flanges are provided on the upper and lower sides of the openings, and the box door is buckled on the outside of the flanges to be flexibly connected with the box body frame. A sealing strip is set between the box frame and the door, the top cover is set on the upper part of the box frame, and the shaft joint is set on the top cover. Usually, the output shaft is located at the center of the top cover and extends out. The shaft joint and the output shaft protruding from the top cover connect. The invention also includes shaft guards and door guards.

The shaft protection device includes a sealing ring and a shaft sleeve. The sealing ring is a V-shaped sealing ring, that is, the sealing ring is a circular structure with a V-shaped cross section. A groove, the cross section of which is V-shaped, the annular area of the lower surface of the sealing ring is smaller than the area of the upper surface, and is centered, and both sides of the sealing ring are inclined. The shaft sleeve is cylindrical, and its inner hole size corresponds to the outer circle size of the output shaft. The shaft sleeve is fixedly connected to the upper part of the top cover and sleeved outside the output shaft, that is, the shaft sleeve is installed on the top cover, and the output shaft extends out of the through hole. The lower end of the shaft joint is set on the outside of the shaft sleeve, and a groove is arranged on the inner wall of the lower end of the shaft joint. The groove and the inner hole of the shaft joint form a stepped hole. Usually, the depth of the groove corresponds to the height of the shaft sleeve. The sealing ring described above is set between the shaft sleeve and the shaft joint, and in the groove of the shaft joint, as shown in Figure 2. In this embodiment, both the outer circle of the shaft sleeve and the inner wall of the groove of the shaft joint are provided with limiting grooves for installing the sealing ring, and the sealing ring is installed in the limiting groove to prevent its displacement and ensure the sealing effect.

The door protection device includes a second sealing frame and an elastic sealing plate. The second sealing frame is composed of a vertical side and a horizontal side, and the cross section is a strip-like structure at right angles. The angle between the horizontal side and the vertical side is Less than 90 degrees, the vertical side is fixedly connected to the inner side of the flange on the box frame, and the horizontal side extends outward to be parallel to the flange and protrude from the flange. From the perspective of the cross section, the outer side of the horizontal side protrudes from the outer side of the flange. Usually the transverse edge protrudes 2 mm outside the flange. The elastic sealing plate is a strip-shaped rectangular plate whose length corresponds to the width of the door, and is arranged laterally on the inner side of the door, corresponding to the lateral side of the second sealing frame, that is, after the door and the box frame are fastened, the elastic sealing plate Corresponding contact with the horizontal side, see Figure 3 and Figure 4. The thickness of the elastic sealing plate is greater than the thickness of the sealing strip. Usually, the thickness of the elastic sealing plate is about 2 mm thicker than that of the sealing strip. The elastic sealing plate is generally made of foamed silicone rubber or EPDM rubber. Therefore, the elastic sealing plate has good elasticity. , also has a certain moisture absorption capacity. The sealing strip between the box frame and the door is a hollow sealing strip, which is fixedly connected to the outside of the flange, and the sealing strip and the flange form a first sealing frame. In the present invention, the flanges on the box frame can also be arranged along the four sides of the opening.

When the mechanism box of the isolating switch is used outdoors, sand and dust may mainly enter from the part where the output shaft protrudes from the box, that is, enter from between the top cover and the output shaft. A shaft sleeve is set at the through hole of the shaft sleeve, and a groove is provided at the lower end of the shaft joint outside the shaft sleeve to facilitate the installation of the sealing ring. After the sealing ring is installed between the shaft sleeve and the shaft joint, it can effectively prevent moisture and dust. Enter the box from the top cover; the sealing ring adopts a V-shaped structure, and its upper part is more elastic. After installation, its upper part is properly compressed, even in the weather of alternating cold and hot, to prevent gaps due to thermal expansion and contraction, and to ensure sealing. At the same time, it also prevents excessive interference fit in the blind pursuit of sealing performance, which will cause excessive friction when the shaft joint rotates and affect its rotation. Coupled with the blocking of the shaft sleeve, sand and dust will not enter the inside of the box along the through hole between the output shaft and the top cover, which is effective in preventing sand and dust and is also waterproof.

The present invention also provides a door protection device, that is, an approximately right-angled second sealing frame is arranged on the flange of the box frame, and its transverse edge protrudes outward from the flange. An elastic sealing plate is set at the position, and a hollow sealing strip is set on the outside of the flange. When the door buckle is connected to the box frame, the hollow sealing strip on the flange is squeezed by the door. The hollow sealing strip has good elasticity and forms surface contact with the door after extrusion to improve the sealing performance. The sealing strip on the flange is in contact with the door The first sealing protection is formed after the door is in contact. At the same time, the outer side of the above-mentioned horizontal edge is also in extrusion contact with the elastic sealing plate on the door. The horizontal edge and the elastic sealing plate are in line contact, and the horizontal edge protrudes from the flange. The outer side, so the contact between the transverse edge and the elastic sealing plate is closer, which forms the second sealing protection, the first protection effectively blocks most of the water from entering the box, and a small amount of water or sand that enters is more closely contacted by the second It is blocked by the road sealing protection to prevent dust and water from entering the box and affecting the normal operation of the equipment. The second sealing frame is fixedly connected to the inner side of the flange through its vertical edge, such as welding connection or riveting, etc., which is easy to manufacture and can be completed on the basis of existing products without replacing a new box frame, reducing costs; in addition, due to the second The angle between the vertical side and the horizontal side of the second sealing frame is less than 90 degrees, especially the second sealing frame connected to the upper flange, as shown in Figure 4. The horizontal side is an inclined surface with a high front and a low rear. This structure can Make the moisture or dust entering from the first sealing protection fall into the angle between the rear side of the horizontal side and the vertical side, and not enter the box along the gap between the horizontal side and the elastic sealing plate, in order to prevent moisture or sand The two ends of the second sealing frame fall into the box body, and baffles can also be arranged at the two ends of the second sealing frame.

The invention has a reasonable structure, is easy to manufacture, and has the characteristics of being effectively waterproof and dustproof.

Claims (2)

1. an outdoor high-voltage isolating switch mechanism seals casing, comprise box frame, chamber door, top cover and shaft coupling, box frame is provided with outwardly flange, chamber door to be buckled in outside flange with box frame for being flexibly connected, and arrange sealing strip between box frame and door, top cover is arranged on box frame top, shaft coupling is arranged on top cover top, shaft coupling is connected with the output shaft stretching out top cover, it is characterized in that: also comprise axle portion protector and door portion protector

Axle portion protector comprises sealing ring and axle sleeve, sealing ring is v-ring, namely sealing ring is cirque structure, its cross section is V-shaped, this V-arrangement cross section is specially: sealing ring is provided with an annular groove along upper surface, and the cross section of this groove is V-shaped, and the annulus area of the lower surface of sealing ring is less than the area of upper surface, and placed in the middle, and the both sides of sealing ring are all in skewed; Described axle sleeve is cylindrical, and its hole size is corresponding to output shaft excircle dimension, and axle sleeve is fixedly connected on top cover top and is placed on output shaft then outward; The lower end of described shaft coupling is placed on the outside of axle sleeve, and shaft coupling lower end inner wall is provided with groove, and the endoporus of this groove and shaft coupling forms stepped hole, and described sealing ring is arranged between axle sleeve and shaft coupling, in the groove of shaft coupling;

Described door portion protector comprises the second sealing frame and elastic packing plate, the cross section that second sealing frame is made up of vertical edge and horizontal edge is into seemingly rectangular-shaped strip structure, angle between horizontal edge and vertical edge is less than 90 degree, its vertical edge is fixedly connected with inside the flange on box frame, its horizontal edge stretches out parallel with flange and stretches out flange, described elastic packing plate is strip rectangular slab, its length is corresponding to gate-width degree, and be horizontally installed on an inner side, corresponding with the horizontal edge of the second sealing frame, namely after door and box frame snapping, sealing plate is with the corresponding contact of horizontal edge, sealing plate thickness is greater than the thickness of sealing strip, sealing strip between described box frame and door is hollow sealing strip, and it is fixedly connected on the outside of flange, and sealing bar and flange form the first sealing frame.

2. outdoor high-voltage isolating switch mechanism seals casing according to claim 1, is characterized in that: on the groove inner wall of sleeve outer circle and shaft coupling, be provided with the stopper slot installing sealing ring.