A liquid level meter for high voltage insulating bushing used in substation

Abstract

The present invention discloses a liquid level gauge for a high-voltage insulating bushing for a substation, comprising a liquid level gauge body, a liquid level gauge detection tube fixedly mounted on the lower side of the liquid level gauge body, an external thread provided on the outer peripheral side of the liquid level gauge detection tube, an adjusting bolt rotatably mounted on the external thread, a plane bearing rotatably mounted on the lower side of the adjusting bolt, a rubber ferrule provided on the lower side of the plane bearing, an annular groove provided on the outer peripheral side of the rubber ferrule, the rubber ferrule slidably sleeved on the outer peripheral side of the liquid level gauge detection tube, an open or contracted support member installed on the liquid level gauge detection tube, the support member being located below the rubber ferrule. A liquid level gauge for a high-voltage insulating bushing for a substation can seal the location where the liquid level gauge is installed on the high-voltage insulating bushing, effectively avoiding problems such as oil leakage or pressure relief at the location where the device is installed on the insulating bushing, and has strong practicality.

Description

Technical Field

[0001] The invention relates to the technical field of liquid level detection, in particular to a liquid level meter for a high-voltage insulating bushing used in a transformer substation. Background Art

[0002] In a high-voltage substation, the oil level in the high-voltage bushing needs to be kept at a normal height to ensure the safe operation of the components in the transformer bushing. By monitoring the oil level inside the insulating bushing, it is possible to effectively determine whether the components in the bushing are working normally.

[0003] The oil level in the oil-filled bushing is mostly detected by a level gauge. The data from the level gauge is observed to facilitate the addition and monitoring of oil to ensure the normal operation of the oil-filled bushing. However, the insulating bushing has strict requirements on the sealing of the internal oil field. After the level gauge is installed, its installation position cannot be effectively sealed. Failure to seal the bushing may easily bring safety hazards to the reliable and stable operation of the components in the bushing. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide a liquid level gauge for a high-voltage insulating bushing for a substation, which can effectively seal the high-voltage insulating bushing where the liquid level gauge is installed to avoid problems such as oil leakage or pressure relief. It has good sealing performance and strong practicality, and can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a liquid level gauge for a high-voltage insulating bushing for a substation, comprising a liquid level gauge body, a liquid level gauge detection tube fixedly installed on the lower side of the liquid level gauge body, an external thread provided on the outer peripheral side of the liquid level gauge detection tube, an adjusting bolt rotatably installed on the external thread, a plane bearing rotatably installed on the lower side of the adjusting bolt, a rubber ring provided on the lower side of the plane bearing, an annular groove provided on the outer peripheral side of the rubber ring, the rubber ring slidably sleeved on the outer peripheral side of the liquid level gauge detection tube, an open or contracted support member installed on the liquid level gauge detection tube, and the support member is located below the rubber ring.

[0006] As a preferred technical solution of the present invention, the support member includes a first ring, which is located below the rubber ring and is slidably sleeved on the outer peripheral side of the liquid level gauge detection tube. A plurality of first fan-shaped plates are rotatably mounted on the first ring.

[0007] As a preferred technical solution of the present invention, a second ring is provided below the first ring, the second ring is slidably sleeved on the outer peripheral side of the liquid level gauge detection tube, a plurality of second fan-shaped plates are rotatably mounted on the second ring, and the plurality of first fan-shaped plates and the plurality of second fan-shaped plates are staggered with each other.

[0008] As a preferred technical solution of the present invention, an annular groove is provided on the upper side of the first sector plate and the upper side of the second sector plate, and the rubber ring is clamped in the annular groove.

[0009] As a preferred technical solution of the present invention, the outer peripheral side of the first sector plate is fixedly connected to one end of the connecting rope, and the other end of the connecting rope is fixedly connected to the outer peripheral side of the rubber ring.

[0010] As a preferred technical solution of the present invention, a limiting member is fixedly installed on the outer peripheral side of the liquid level gauge detection tube, and the limiting member is located below the second ring.

[0011] As a preferred technical solution of the present invention, an annular restraining member is sleeved on the outer circumference of the liquid level gauge detection tube, and the restraining member is slidably installed between the plane bearing and the rubber ring.

[0012] As a preferred technical solution of the present invention, an annular groove is provided on the lower side of the restraining member, and the diameter of the annular groove gradually increases from top to bottom.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The present invention illustrates a liquid level gauge for a high-voltage insulating bushing for a substation. The adjusting bolt is rotated to move upward along the external thread of the liquid level gauge detection tube, and the sliding rubber ring is moved upward. When the rubber ring moves upward, the connecting rope is stretched, and the connecting rope drives the first sector plate to rotate upward on the outer peripheral side of the first ring. Then, the second ring is adjusted to move upward, so that the second sector plate is freed from the constraint of the limiter. The second sector plate is affected by gravity and rotates downward on the outer peripheral side of the second ring, so that the device is in a contracted state, which is convenient for the device to be installed in the hole to be installed.

[0015] 2. In a liquid level gauge of a high-voltage insulating bushing for a substation according to an example of the present invention, a flat bearing slides down under pressure to drive a restraining part to be pressed down, and an annular groove with a diameter that gradually increases from top to bottom is opened on the lower side of the restraining part. When the restraining part is pressed down, the inner wall of the annular groove squeezes the rubber ring, and the upper part of the rubber ring is squeezed toward the wall of the liquid level gauge detection tube and the outer wall of the insulating bushing, thereby sealing the outer side of the mounting hole, preventing external liquid or gas from entering the interior of the insulating bushing, and avoiding external objects from affecting the insulating oil or device inside the insulating bushing.

[0016] 3. In a liquid level gauge of a high-voltage insulating bushing for a substation according to an example of the present invention, the adjusting bolt is rotated downward so that the lower side of the annular groove of the rubber ring is clamped in the inner part of the annular groove. As the adjusting bolt is rotated downward, the groove wall of the annular groove constrains and squeezes the lower side of the rubber ring, so that the lower side of the rubber ring is closely attached to the outer wall of the liquid level gauge detection tube and the inner wall of the insulating bushing, thereby forming a seal on the inside of the insulating bushing to prevent the internal oil from flowing out. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the present invention in an installed state;

[0018] Figure 2 It is a schematic diagram of the structure of the present invention in an uninstalled state.

[0019] In the figure: 1 liquid level gauge body, 2 liquid level gauge detection tube, 3 plane bearing, 4 rubber ring, 5 first sector plate, 6 first ring, 7 second sector plate, 8 limiter, 9 adjusting bolt, 10 restraining member, 11 connecting rope, 12 second ring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-2 The present invention provides a technical solution: a liquid level gauge for a high-voltage insulating bushing for a substation, comprising a liquid level gauge body 1, a liquid level gauge detection tube 2 is fixedly installed on the lower side of the liquid level gauge body 1, an external thread is provided on the outer peripheral side of the liquid level gauge detection tube 2, an adjusting bolt 9 is rotatably installed on the external thread, a plane bearing 3 is rotatably installed on the lower side of the adjusting bolt 9, a rubber ring 4 is provided on the lower side of the plane bearing 3, the plane bearing 3 prevents the rubber ring 4 from generating torque when the adjusting bolt 9 is rotated to cause it to be misplaced, an annular groove is provided on the outer peripheral side of the rubber ring 4, the annular groove is clamped with the pipe wall of the high-voltage insulating bushing, the rubber ring 4 is slidably sleeved on the outer peripheral side of the liquid level gauge detection tube 2, an open or contracted support member is installed on the liquid level gauge detection tube 2, and the support member is located below the rubber ring 4.

[0022] Furthermore, the support member includes a first ring 6 , which is located below the rubber ring 4 , and is slidably sleeved on the outer peripheral side of the liquid level gauge detection tube 2 , and a plurality of first sector plates 5 are rotatably mounted on the first ring 6 .

[0023] Furthermore, a second ring 12 is provided below the first ring 6, and the second ring 12 is slidably mounted on the outer peripheral side of the liquid level gauge detection tube 2. A plurality of second fan-shaped plates 7 are rotatably mounted on the second ring 12, and a plurality of first fan-shaped plates 5 and a plurality of second fan-shaped plates 7 are staggered with each other.

[0024] Furthermore, an annular groove is formed on the upper side of the first sector plate 5 and the upper side of the second sector plate 7, and the rubber ring 4 is clamped in the annular groove.

[0025] Furthermore, the outer peripheral side of the first sector plate 5 is fixedly connected to one end of the connecting rope 11 , and the other end of the connecting rope 11 is fixedly connected to the outer peripheral side of the rubber ring 4 .

[0026] Furthermore, a limiting member 8 is fixedly installed on the outer peripheral side of the liquid level gauge detection tube 2 , and the limiting member 8 is located below the second ring 12 .

[0027] Furthermore, an annular restraining member 10 is sleeved on the outer circumference of the liquid level gauge detection tube 2 , and the restraining member 10 is slidably installed between the plane bearing 3 and the rubber ring 4 .

[0028] Furthermore, an annular groove is formed on the lower side of the restraining member 10, and the diameter of the annular groove gradually increases from top to bottom.

[0029] Further, a photoelectric sensor is installed on the scale dial of the liquid level gauge body 1, and the photoelectric sensor is located on the outer side of the scale dial of the liquid level gauge body 1, and the photoelectric sensor does not affect the rotation of the pointer of the liquid level gauge body 1; the photoelectric sensor is preferably a photoelectric switch, and the photoelectric switch is normally open; the rise or fall of the oil level inside the oil-filled casing is transmitted to the liquid level gauge body 1 through the liquid level gauge detection tube 2, so that the pointer of the liquid level gauge body 1 rotates, and the rotation of the pointer of the liquid level gauge body 1 will cover the detection end of the photoelectric sensor, so that the photoelectric switch changes from an open state to a closed state, and the photoelectric switch is closed and powered on. The photoelectric switch converts the digital signal on the scale dial into an electrical signal and transmits it to the remote controller. The signal transmitted by the photoelectric switch at different positions can determine the oil level inside the casing, thereby realizing the function of remote monitoring; the liquid level gauge body 1 and the photoelectric sensor are both commonly used electronic components in the prior art, and their working methods and circuit structures are all well-known technologies, which are not described in detail here; the output end of the photoelectric sensor is electrically connected to one end of an external wire, and the other end of the external wire passes through the liquid level gauge body 1 and is electrically connected to an external PLC controller.

[0030] When in use: first adjust the device: turn the adjusting bolt 9 to move up along the external thread of the liquid level gauge detection tube 2, and slide the rubber ring 4 up. When the rubber ring 4 moves up, stretch the connecting rope 11, and the connecting rope 11 drives the first fan-shaped plate 5 to rotate upward on the outer peripheral side of the first ring 6. Then adjust the second ring 12 to move up, so that the second fan-shaped plate 7 is free from the constraint of the limit member 8. The second fan-shaped plate 7 is affected by gravity and rotates downward on the outer peripheral side of the second ring 12, so that the device is in a contracted state, which is convenient for the device to be installed in the oil-filled casing hole that needs to be installed.

[0031] After the adjustment is completed, put the support of the device into the hole of the oil-filled casing to be installed, use the elasticity of the rubber ring 4 to apply force to the lower part of the rubber ring 4, so that the lower part of the rubber ring 4 is inserted into the hole of the oil-filled casing to be installed, and the shape of the lower part of the rubber ring 4 is restored to its original state. Adjust the rubber ring 4 so that the annular groove and the pipe wall of the high-voltage insulating casing are clamped, and the adjusting bolt 9 is rotated to move downward. The adjusting bolt 9 moves downward to press the plane bearing 3 to slide down, and the plane bearing 3 prevents the constraint 10 and the rubber ring 4 from being pressed when the adjusting bolt 9 is rotated. Torque is generated to cause it to be misplaced, and the plane bearing 3 slides down under pressure, driving the constraint part 10 to be pressed down. An annular groove with a diameter that gradually increases from top to bottom is opened on the lower side of the constraint part 10. When the constraint part 10 is pressed down, the inner wall of the annular groove squeezes the rubber ring 4, and the upper part of the rubber ring 4 is squeezed toward the tube wall of the liquid level gauge detection tube 2 and the tube wall outside the insulating sleeve, thereby sealing the outside of the mounting hole, preventing external liquid or gas from entering the inside of the insulating sleeve, and preventing external objects from affecting the insulating oil or device inside the insulating sleeve.

[0032] After the support is placed in the hole to be installed, the second ring 12 slides downward under the influence of gravity, and the second ring 12 slides down and drives the second fan-shaped plate 7 to slide down. When the second fan-shaped plate 7 slides down and contacts the upper side of the limit member 8, the second fan-shaped plate 7 rotates upward around the second ring 12; when the adjusting bolt 9 is rotated to slide down, the liquid level gauge detection tube 2 slides upward. When the liquid level gauge detection tube 2 slides upward, the connecting rope 11 gradually loses the constraint on the first fan-shaped plate 5. The first fan-shaped plate 5 rotates downward on the outer peripheral side of the first ring 6 under the influence of gravity, and drives the limit member 8 to rise when the liquid level gauge detection tube 2 slides upward. The rise of the limit member 8 gradually constrains the second fan-shaped plate 7. The limit member 8 drives the second fan-shaped plate 7 and the second ring 12 to rise. The second fan-shaped plate 7 and the first fan-shaped plate 5 are arranged alternately. When the second fan-shaped plate 7 rises, it gradually splices with the first fan-shaped plate 5 to form a disc, and under the constraint of the limit member 8, the first fan-shaped plate 5 and the first ring 6 both rise together with the limit member 8.

[0033] Annular grooves are provided on the upper sides of the first sector plate 5 and the second sector plate 7. After the disc formed by the meshing of the second sector plate 7 and the first sector plate 5 contacts the lower side of the rubber ring 4, the adjusting bolt 9 continues to be rotated downward so that the lower side of the annular groove of the rubber ring 4 is clamped inside the annular groove. As the adjusting bolt 9 rotates downward, the groove wall of the annular groove constrains and squeezes the lower side of the rubber ring 4, so that the lower side of the rubber ring 4 is tightly attached to the outer wall of the liquid level gauge detection tube 2 and the inner wall of the insulating sleeve, forming a seal on the inside of the insulating sleeve to prevent the internal oil from flowing out.

[0034] When the device needs to be disassembled from the insulating sleeve, rotate the adjusting bolt 9, and the adjusting bolt 9 rotates upward along the external thread of the liquid level gauge detection tube 2. The adjusting bolt 9 drives the plane bearing 3 to move upward, and the constraint 10 gradually reduces the constraint on the upper side of the rubber ring 4. When the adjusting bolt 9 is rotated upward, the liquid level gauge detection tube 2 moves downward to increase its length entering the oil-filled sleeve, and the limiter 8 loses the constraint on the support. When the adjusting bolt 9 is adjusted to a certain height, force is applied to the upper side of the rubber ring 4 to pull it out of the mounting hole, and the sliding rubber ring 4 moves upward. When the rubber ring 4 moves upward, the connecting rope 11 is stretched, and the connecting rope 11 drives the first sector plate 5 to rotate upward. Use a hook hook or other tools to adjust the second ring 12 to move upward, so that the second sector plate 7 is free from the constraint of the limiter 8. The second sector plate 7 is affected by gravity and rotates downward on the outer peripheral side of the second ring 12, so that the support is in a contracted state, and the device is taken out of the mounting hole of the oil-filled sleeve.

[0035] The invention can effectively seal the location where the high-voltage insulating bushing is installed with a liquid level gauge, thereby avoiding problems such as oil leakage or pressure relief, and has good sealing performance and strong practicality.

[0036] The undisclosed parts in the present invention are all prior art, and their specific structures, materials and working principles are not described in detail. Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A liquid level meter for a high-voltage insulating bushing for a substation, comprising a liquid level meter body (1), characterized in that: A liquid level gauge detection tube (2) is fixedly mounted on the lower side of the liquid level gauge body (1); an external thread is provided on the outer peripheral side of the liquid level gauge detection tube (2); an adjusting bolt (9) is rotatably mounted on the external thread; a plane bearing (3) is rotatably mounted on the lower side of the adjusting bolt (9); a rubber ring (4) is provided on the lower side of the plane bearing (3); an annular groove is provided on the outer peripheral side of the rubber ring (4); and the rubber ring (4) is slidably sleeved on the outer peripheral side of the liquid level gauge detection tube (2); The liquid level gauge detection tube (2) is provided with an open or contracted support member, and the support member is located below the rubber ring (4); The support member comprises a first ring (6), the first ring (6) is located below the rubber ring (4), the first ring (6) is slidably sleeved on the outer peripheral side of the liquid level gauge detection tube (2), and a plurality of first sector plates (5) are rotatably mounted on the first ring (6); A second ring (12) is provided below the first ring (6), the second ring (12) is slidably sleeved on the outer peripheral side of the liquid level gauge detection tube (2), a plurality of second sector plates (7) are rotatably mounted on the second ring (12), and the plurality of first sector plates (5) and the plurality of second sector plates (7) are staggered with each other; An annular groove is provided on the upper side of the first sector plate (5) and the upper side of the second sector plate (7), and the rubber ring (4) is clamped in the annular groove; A limiting member (8) is fixedly mounted on the outer peripheral side of the liquid level gauge detection tube (2), and the limiting member (8) is located below the second ring (12); An annular restraining member (10) is sleeved on the outer peripheral side of the liquid level gauge detection tube (2), and the restraining member (10) is slidably installed between the plane bearing (3) and the rubber ring (4).

2. The liquid level gauge of a high-voltage insulating bushing for a substation according to claim 1, characterized in that: The outer peripheral side of the first sector plate (5) is fixedly connected to one end of the connecting rope (11), and the other end of the connecting rope (11) is fixedly connected to the outer peripheral side of the rubber ring (4).

3. The liquid level gauge of the high-voltage insulating bushing for a substation according to claim 1, characterized in that: An annular groove is provided on the lower side of the restraining member (10), and the diameter of the annular groove gradually increases from top to bottom.

Images