Direct-acting sealing mechanism of high-voltage circuit breaker

Abstract

The utility model relates to the technical field of high-voltage circuit breaker sealing, and discloses a direct-acting sealing mechanism of a high-voltage circuit breaker, which comprises a fixed sleeve, a movable cavity is arranged on the inner wall of the fixed sleeve, a transmission shaft is movably mounted in the movable cavity, and a sealing mechanism is arranged in the movable cavity. The transmission shaft and the fixing sleeve are matched with a plurality of groups of sealing rings which are arranged in the three groups of sealing cavities and are connected end to end, so that the sealing ring combination with staggered connecting gaps can keep good stability between the transmission shaft and the fixing sleeve; the two groups of arc-shaped belts on the arc-shaped outer surface of the sealing ring are forced to be far away from each other and are further embedded into a gap between the sealing cavity and the sealing ring, so that the overall sealing effect of the sealing ring can be always kept, and the condition of air leakage during use of the high-voltage circuit breaker is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to high pressure circuit breaker sealing technical field, concretely is a kind of high pressure circuit breaker direct-acting sealing mechanism. BACKGROUND

[0002] The mechanism and arc-extinguishing chamber transmission connection part of sulfur hexafluoride circuit breaker generally adopt two forms of transmission box and linear motion sealing structure, the direct-acting sealing structure can be directly connected with the mechanism, simple structure, lower cost, but the direct-acting sealing structure is influenced by the swing lateral force of mechanism, and air leakage condition is prone to occur, so the direct-acting sealing mechanism needs to be improved and protected.

[0003] According to the direct-acting sealing mechanism (publication number: CN203491179U) of high pressure sulfur hexafluoride circuit breaker disclosed, in the above application, the sealing seat center hole is provided with two rubber ring grooves and a sealing hole, the sealing hole is located between the two rubber ring grooves, a T-shaped sealing ring and a gasket are arranged in each rubber ring groove, and the sealing hole is filled with 2# low temperature lubricating grease, so as to ensure the stability of the direct-acting sealing mechanism of circuit breaker.

[0004] But the above-mentioned equipment in actual use process, since the transmission shaft of direct-acting mechanism and the equipment are linearly moved, this makes the sealing ring in contact with transmission shaft easy to appear wear and tear and leakage in the process of using, influence the overall sealing property of direct-acting sealing mechanism;In view of this, we provide a kind of high pressure circuit breaker direct-acting sealing mechanism. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of high pressure circuit breaker direct-acting sealing mechanism to solve the problems raised in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of high pressure circuit breaker direct-acting sealing mechanism, including fixed sleeve, the inner wall of the fixed sleeve is equipped with movable cavity, the inside movable installation of the movable cavity is with transmission shaft, the inside of the movable cavity is provided with sealing mechanism, the sealing mechanism includes:

[0007] Sealing cavity, the inner surface of the movable cavity is equipped with sealing cavity, the inner surface of the sealing cavity is provided with sealing ring;

[0008] Rubber column, one end of the sealing ring is fixedly installed with rubber column, the inner wall of the other end of the sealing ring is equipped with inner recessed cavity, the inside of the sealing ring is equipped with filling cavity;

[0009] Dimple, the arc-shaped outer surface of the sealing ring is equipped with dimple, the arc-shaped outer wall of the sealing ring is provided with arc-shaped band, the arc-shaped outer surface of the arc-shaped band is equipped with grease storage groove.

[0010] Preferably, the number of the sealing cavities is provided with three groups, and the three groups of sealing cavities are uniformly distributed in the interior of the movable cavity in a linear array, the number of the sealing rings is provided with three groups, and the three groups of sealing rings are connected in a circular array, and the connecting portions between the sealing rings provided in the three groups of sealing cavities are staggered, so that the overall sealing property of the three groups of sealing cavities is effectively ensured, and the air leakage prevention effect of the device is improved.

[0011] Preferably, the rubber column is matched with the size of the inner concave cavity, and a cylindrical magnet is arranged at the center of the rubber column, and a thin metal sheet is arranged on the inner surface of the inner concave cavity, so that stable connection can be realized when the groups of sealing rings are connected in series.

[0012] Preferably, the interior of the filling cavity is filled with inert gas, so that the sealing ring does not have different properties in a region with large temperature change, so that the sealing ring always maintains an expanded state.

[0013] Preferably, the number of the arc-shaped belts is provided with two groups, and the two groups of arc-shaped belts are mirror arranged on the upper and lower sides of the central axis of the sealing ring, and the two groups of arc-shaped belts are arranged on the outer wall of the sealing ring close to the transmission shaft.

[0014] Preferably, the fat storage groove is provided in a semispherical shape, and the number of the fat storage grooves is provided with several groups, and the several groups of fat storage grooves are uniformly distributed on the outer surface of the arc-shaped belt.

[0015] Preferably, the interior of the arc-shaped belt is provided with a containing cavity, and leak holes are arranged on the left and right inner walls of the containing cavity.

[0016] Compared with the prior art, the high-voltage circuit breaker direct sealing mechanism has the following beneficial effects:

[0017] 1. The high-voltage circuit breaker direct sealing mechanism is provided with a sealing mechanism, and a plurality of sealing rings connected in series are arranged in three groups of sealing cavities, so that the sealing ring combination with staggered connecting gaps can maintain good stability between the transmission shaft and the fixed sleeve. When the transmission shaft moves linearly, the arc-shaped belt on the surface of the sealing ring is extruded, forcing the two groups of arc-shaped belts on the arc-shaped outer surface of the sealing ring to move away from each other and further embed into the gap between the sealing cavity and the sealing ring, so that the overall sealing effect of the sealing ring can be maintained at all times, and the air leakage of the high-voltage circuit breaker during use is avoided.

[0018] 2、 the high voltage circuit breaker direct sealing mechanism, the transmission shaft is separated from the sealing ring after extruding the sealing ring, two groups of arc-shaped belts produce deformation and realize recovery, and the 2# low temperature lubricating grease filled in the sealing cavity will enter the containing cavity through the leakage port, a part of the 2# low temperature lubricating grease will be temporarily left in the concave point and the grease storage groove, and the extrusion of the arc-shaped belt during the linear motion of the transmission shaft will make the 2# low temperature lubricating grease in the containing cavity flow out through the leakage port again, fill between the sealing ring and the transmission shaft, reduce the wear of the surface of the sealing ring, and ensure the sealing effect between the sealing ring and the transmission shaft. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic view of the main structure of the utility model;

[0020] Figure 2 It is a schematic view of the sectional structure of the utility model;

[0021] Figure 3 It is a schematic view of the sealing ring connection of the utility model;

[0022] Figure 4 It is a schematic view of the sealing ring structure of the utility model;

[0023] Figure 5 It is a schematic view of the sectional structure of the sealing ring of the utility model;

[0024] Figure 6 It is the utility model Figure 5 A local enlarged schematic view of region A.

[0025] In the drawing: 1, fixed sleeve; 2, transmission shaft; 3, sealing cavity; 4, sealing ring; 5, rubber column; 6, inner concave cavity; 7, filling cavity; 8, concave point; 9, arc-shaped belt; 10, containing cavity; 11, leakage port; 12, grease storage groove. DETAILED DESCRIPTION

[0026] As Figures 1-6 Indicated, the utility model provides a technical scheme: a kind of high voltage circuit breaker direct sealing mechanism, including fixed sleeve 1, the inner wall of fixed sleeve 1 is equipped with movable cavity, movable cavity is movably installed with transmission shaft 2, movable cavity is provided with sealing mechanism, and sealing mechanism includes sealing cavity 3, sealing ring 4, rubber column 5, inner concave cavity 6, filling cavity 7, concave point 8 and arc-shaped belt 9 and grease storage groove 12.

[0027] In an embodiment of the utility model, the inner surface of movable cavity is provided with sealing cavity 3, the inner surface of sealing cavity 3 is provided with sealing ring 4, one end of sealing ring 4 is fixedly installed with rubber column 5, the other end inner wall of sealing ring 4 is provided with inner concave cavity 6, the inside of sealing ring 4 is provided with filling cavity 7, the arc outer surface of sealing ring 4 is provided with concave point 8, the arc outer wall of sealing ring 4 is provided with arc band 9, the arc outer surface of arc band 9 is provided with fat storage groove 12.

[0028] Further, the bottom end of the fixed sleeve 1 is matched with the top end of the high-voltage circuit breaker, and is connected with the high-voltage circuit breaker during use. Specifically, the sealing cavities 3 are arranged in a circular ring shape, and there are three groups of sealing cavities 3, which are evenly distributed in the interior of the movable cavity in a linear array. At the same time, the outer diameter of the sealing ring 4 is slightly larger than the inner length of the sealing cavity 3, so that the sealing ring 4 can be installed in the sealing cavity 3 with a certain positioning effect, and will not easily come off, thereby ensuring the sealing effect of the whole device. In addition, there are three groups of sealing rings 4, which are connected in a circular array. Specifically, the connecting parts between the sealing rings 4 arranged in the three groups of sealing cavities 3 are arranged in a staggered manner, thereby effectively ensuring the overall sealing property of the three groups of sealing cavities 3 and improving the air leakage prevention effect of the device.

[0029] In addition, the rubber column 5 is matched with the size of the inner cavity 6, and the center of the rubber column 5 is provided with a cylindrical magnet, and the inner surface of the inner cavity 6 is provided with a thin metal sheet, so that the three groups of sealing rings 4 can be stably connected when connected end to end, so as to avoid the disconnection of the transmission shaft 2 during operation, so that the three groups of sealing rings 4 in the sealing cavity 3 can form a relatively complete whole, and the inside of the filling cavity 7 is filled with inert gas, so that the sealing ring 4 maintains a certain stability and does not have different performances in a large temperature change area, so that the sealing ring 4 always maintains an inflation state to realize the sealing effect of the sealing cavity 3, further, the sealing cavity 3 is filled with 2# low temperature lubricating grease during use and maintenance, which can lubricate the equipment within a certain temperature range, thereby reducing the friction of the sealing ring 4 surface during the work of the transmission shaft 2, ensuring the service life of the sealing ring 4, and also improving the overall air leakage prevention effect of the sealing cavity 3 part, specifically, the number of concave points 8 is set to be several groups, and the several groups of concave points 8 are uniformly distributed on the arc-shaped outer surface of the sealing ring 4 close to the transmission shaft 2, and the number of arc-shaped belts 9 is set to be two groups, and the two groups of arc-shaped belts 9 are mirror image arranged on the upper and lower sides of the central axis of the sealing ring 4, and the two groups of arc-shaped belts 9 are arranged on the outer wall of the sealing ring 4 close to the transmission shaft 2, specifically, the two groups of arc-shaped belts 9 have a certain gap, the concave points 8 are arranged in the gap between the two groups of arc-shaped belts 9, and the grease storage groove 12 is in a semispherical shape, and the number of the grease storage groove 12 is set to be several groups, and the several groups of grease storage grooves 12 are uniformly distributed on the outer surface of the arc-shaped belt 9, when the transmission shaft 2 moves linearly, the extrusion force generated by the sealing ring 4 makes the sealing ring 4 move towards the bottom side of the sealing cavity 3, so as to force the two groups of arc-shaped belts 9 on the arc-shaped outer surface of the sealing ring 4 to move away from each other, and further embedded in the gap between the sealing cavity 3 and the sealing ring 4, so that the overall sealing effect of the sealing ring 4 can be maintained at all times, avoiding the air leakage of the high-voltage circuit breaker during use.

[0030] In the embodiment of the utility model, the inside of arc-shaped belt 9 is provided with containing cavity 10, the left and right two sides of containing cavity 10 are provided with leak 11, specifically, the number of leak 11 is set to be several groups, and the several groups of leak 11 are equidistance distribution in the inside of containing cavity 10, and when the transmission shaft 2 is separated from the sealing ring 4 after extruding the sealing ring 4, the two groups of arc-shaped belts 9 are deformed and restored, and the 2# low temperature lubricating grease filled in the sealing cavity 3 will enter containing cavity 10 through leak 11, part of 2# low temperature lubricating grease will be temporarily reserved in the inside of concave point 8 and grease storage groove 12, and the extrusion of arc-shaped belt 9 during the linear motion of transmission shaft 2 next time will make 2# low temperature lubricating grease in containing cavity 10 flow out again through leak 11, and be filled between sealing ring 4 and transmission shaft 2, reducing the abrasion of the surface of sealing ring 4, and ensuring the sealing effect between sealing ring 4 and transmission shaft 2.

[0031] In the utility model, when using, 2# low temperature lubricating grease is filled in the inside of sealed cavity 3, when the transmission shaft 2 is in linear motion, through setting up the sealing mechanism, cooperate with the multiple groups of the sealing ring 4 that first and last are connected in the sealed cavity 3 of three groups, the sealing ring 4 combination that the connecting gap staggered sets can keep good stability between the transmission shaft 2 and the fixed sleeve 1, and when the transmission shaft 2 is in linear motion, through the extrusion of the arc-shaped band 9 on the surface of sealing ring 4, force the two groups of arc-shaped band 9 on the arc-shaped outer surface of sealing ring 4 to be far away from each other, and further embed in the gap between sealing cavity 3 and sealing ring 4, so that the overall sealing effect of sealing ring 4 can be kept all the time, avoid the air leakage of high voltage circuit breaker when using.

[0032] The utility model has been described in detail above, but some modifications or improvements can be made on the basis of the utility model, which is obvious to the general technical personnel in the technical field. Therefore, the modifications or improvements without departing from the spirit of the utility model are within the protection scope of the utility model.

Claims

1. A high-voltage circuit breaker direct-acting sealing mechanism, comprising a fixed sleeve (1), an inner wall of the fixed sleeve (1) being provided with a movable cavity, and a transmission shaft (2) being movably arranged inside the movable cavity, characterized in that: The interior of the movable cavity is provided with a sealing mechanism, which comprises: A sealing cavity (3) is arranged on the inner surface of the movable cavity, and the inner surface of the sealing cavity (3) is provided with a sealing ring (4); A rubber column (5) is fixedly installed at one end of the sealing ring (4), and an inner recess cavity (6) is arranged on the inner wall of the other end of the sealing ring (4). An inner filling cavity (7) is arranged in the sealing ring (4); A concave point (8) is arranged on the arc-shaped outer surface of the sealing ring (4), and an arc-shaped belt (9) is arranged on the arc-shaped outer wall of the sealing ring (4). A fat storage groove (12) is arranged on the arc-shaped outer surface of the arc-shaped belt (9).

2. The high voltage circuit breaker direct action seal mechanism of claim 1, wherein: The number of the sealing cavities (3) is three, and the three sealing cavities (3) are evenly distributed in the interior of the movable cavity in a linear array. The number of the sealing rings (4) is three, and the three sealing rings (4) are connected in a circular array. The connecting parts between the sealing rings (4) arranged in the three sealing cavities (3) are arranged in a staggered manner.

3. The high voltage circuit breaker direct action seal mechanism of claim 1, wherein: The rubber column (5) is matched with the size of the inner recess cavity (6), and a cylindrical magnet is arranged at the center of the rubber column (5). The inner surface of the inner recess cavity (6) is provided with a thin metal sheet.

4. The high voltage circuit breaker direct action seal mechanism of claim 1, wherein: The inner filling cavity (7) is filled with inert gas.

5. The high voltage circuit breaker direct action seal mechanism of claim 1, wherein: The number of the arc-shaped belts (9) is two, and the two arc-shaped belts (9) are mirror image arranged on the upper and lower sides of the central axis of the sealing ring (4). Meanwhile, the two arc-shaped belts (9) are arranged on the outer wall of the sealing ring (4) near the transmission shaft (2).

6. The high voltage circuit breaker direct action seal mechanism of claim 1, wherein: The fat storage groove (12) is arranged in a hemispherical shape, and the number of the fat storage grooves (12) is several. The several fat storage grooves (12) are evenly distributed on the outer surface of the arc-shaped belt (9).

7. The high voltage circuit breaker direct action seal mechanism of claim 1, wherein: The arc-shaped belt (9) is provided with a containing cavity (10), and a leakage hole (11) is arranged on the inner wall of the left and right sides of the containing cavity (10).

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