Double-floater automatic exhaust oil level monitoring relay

Abstract

The utility model relates to a double-floater automatic exhaust oil level monitoring relay which is characterized in that a square stand column connected with the top is arranged in the center of an inner cavity of a relay body, an aluminum connecting rod is connected to the square stand column in a sliding mode, the lower end of the aluminum connecting rod is connected with a first floater, and the upper end of the aluminum connecting rod is connected with a trigger component of a relay trigger mechanism; a guide sleeve is fixedly connected to the side end of the square stand column, a second floater is slidably connected into the guide sleeve, an ejector pin is arranged above the second floater, a deflation shield is arranged at the top of the body, and when the second floater is located at the high position, the ejector pin and the deflation shield are matched for deflation; when the second floater is located at the low position, the ejector pin is separated from the deflation shield, the bottom face of the second floater is located on the bracket, and the bracket is fixedly connected with the square stand column. The double-floater automatic exhaust oil level monitoring relay not only can identify the oil shortage phenomenon of a transformer, but also can automatically exhaust gas before triggering the relay to give an alarm in a false oil shortage state, so that the oil level is recovered to a normal liquid level, and the normal work of the transformer is ensured.

Description

Technical Field

[0001] The utility model relates to a double-float automatic exhaust oil level monitoring relay, belonging to the technical field of transformer safety equipment. Background Art

[0002] Transformers are common equipment for electricity consumption in the industrial field, and their safe operation is the basis of industrial production. Existing transformers all use various types of relays to warn of oil shortage in transformers. A float is set in the relay, and the height of the float on the liquid level is used to determine whether the relay is in an oil shortage state. However, if excessive gas is generated during the operation of the relay, the gas will cause the oil level in the relay to drop, resulting in a false oil shortage phenomenon, which often triggers the relay alarm. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a double-float automatic exhaust oil level monitoring relay, which can not only identify the oil shortage phenomenon of the transformer, but also can automatically exhaust the oil before triggering the relay alarm in a false oil shortage state, so as to restore the oil level to a normal liquid level, thereby ensuring the normal operation of the transformer.

[0004] In order to solve the above problems, the specific technical scheme of the utility model is as follows: a double-float automatic exhaust oil level monitoring relay, a square column connected to the top is provided in the center of the inner cavity of the relay body, an aluminum connecting rod is slidably connected to the square column, the lower end of the aluminum connecting rod is connected to the first float, and the upper end is connected to the trigger component of the relay trigger mechanism; a guide sleeve is fixedly connected to the side end of the square column, a second float is slidably connected in the guide sleeve, a ejector pin is provided above the second float, and an air release shield is provided on the top of the body, when the second float is in a high position, the ejector pin and the air release shield cooperate to release air; when the second float is in a low position, the ejector pin is separated from the air release shield, and the bottom surface of the second float sits on the bracket, and the bracket is fixedly connected to the square column.

[0005] A vent hole is arranged in the degassing shield, a sealing rubber ring is arranged at the inlet end of the vent hole, and the ejector pin is plugged and matched with the sealing rubber ring in a sealing manner.

[0006] The relay trigger mechanism includes a fixed part and a trigger part; the fixed part is composed of a bent plate and a reed switch, the horizontal surface of the bent plate is positioned on the top surface of the cavity of the main body, and the vertical surface of the bent plate positions two parallel reed switches, and one end pin of the reed switch is connected to an external signal line; the trigger part is a permanent magnet, and the reed in each reed switch is located on the moving path of the permanent magnet.

[0007] A test cylinder is arranged on the upper surface of the body, a spring pin on the test cylinder is sealed and inserted into the inner cavity of the body and connected with a shift fork, and the end of the shift fork contacts the top of the aluminum connecting rod.

[0008] The top of the aluminum connecting rod is provided with a horizontal bending surface, the end of the shift fork is provided with an open groove, the open groove is slidably matched with the square column, and the end of the shift fork is in contact with the bending surface at the top of the aluminum connecting rod.

[0009] The bottom center of the square column is connected to a vertical guide rod, and the first float and the bottom of the aluminum connecting rod are slidably matched with the guide rod.

[0010] A shield is provided at the bottom of the body, and evenly distributed through holes are provided on the shield. The shield is located in the transformer box, and the first float is located in the shield.

[0011] The double-float automatic exhaust oil level monitoring relay of the present application adopts the above structure and has the following advantages:

[0012] 1. In addition to using the first float as a trigger alarm for low oil level, the present application also sets a second float as a standard for gas discharge to prevent the transformer from generating a false oil shortage phenomenon and triggering an alarm;

[0013] 2. The low oil level trigger alarm adopts a reed switch structure, which is not only sensitive and fast in signal transmission, but also has a simple transmission structure and saves processing costs;

[0014] 3. The relay of the present application is used for a fully sealed transformer, so a test cylinder is added, which can manually push the aluminum connecting rod to move the permanent magnet back and forth between the two reed switches, thereby judging whether the relay is working properly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main structure of the double-float automatic exhaust oil level monitoring relay.

[0016] Figure 2 It is a side view structural diagram of the double-float automatic exhaust oil level monitoring relay. DETAILED DESCRIPTION

[0017] like Figure 1 and Figure 2As shown, a double-float automatic exhaust oil level monitoring relay is provided, in which a square column 3 connected to the top is provided at the center of the inner cavity of the relay body 4, an aluminum connecting rod 2 is slidably connected to the square column 3, the lower end of the aluminum connecting rod 2 is connected to the first float 1, and the upper end is connected to the trigger component of the relay trigger mechanism; a guide sleeve 5 is fixedly connected to the side end of the square column 3, a second float 6 is slidably connected in the guide sleeve 5, a ejector pin 7 is provided above the second float 6, and an air release shield 9 is provided on the top of the body 4, when the second float 6 is in a high position, the ejector pin 7 cooperates with the air release shield 9 to release air; when the second float 6 is in a low position, the ejector pin 7 is separated from the air release shield 9, and the bottom surface of the second float 6 is seated on the bracket 10, and the bracket 10 is fixedly connected to the square column 3. When the oil level in the relay drops due to excess gas and is at the lower position of the second float 6, the ejector pin 7 is separated from the air vent shield 9, and the excess gas is discharged. The oil level can be restored to its original position without triggering the first reed switch 12, thereby avoiding the occurrence of a false oil level alarm.

[0018] The degassing shield 9 is provided with a vent hole, and a sealing rubber ring 8 is provided at the inlet end of the vent hole, and the ejector pin 7 is sealed and plugged with the sealing rubber ring 8. Usually, the ejector pin 7 is set to a conical structure, and the second float 6 moves downward, and a gap is gradually generated between it and the sealing rubber ring 8 to release gas.

[0019] The relay trigger mechanism includes a fixed part and a trigger part; the fixed part is composed of a bent plate 11 and a reed switch 12, the horizontal surface of the bent plate 11 is positioned on the top surface of the cavity of the body 4, and the vertical surface of the bent plate 11 positions two parallel reed switches 12, one end of the reed switch 12 is connected to the external signal line; the trigger part is a permanent magnet 13, and the reed in each reed switch 12 is located on the moving route of the permanent magnet 13. The reed switch 12 is usually tilted, which not only saves installation space, but also the distance between the reeds of the two reed switches 12 can be changed according to the different tilt angles, which is convenient for adjustment.

[0020] A test cylinder 14 is provided on the upper surface of the body 4. The spring needle seal on the test cylinder 14 is inserted into the inner cavity of the body 4 and connected to the fork 15. The end of the fork 15 contacts the top of the aluminum connecting rod 2. A horizontal bending surface is provided on the top of the aluminum connecting rod 2. An open groove is provided at the end of the fork 15. The open groove is slidably matched with the square column 3. The end of the fork 15 contacts and matches with the bending surface at the top of the aluminum connecting rod 2. When it is necessary to test whether the gas relay is triggered normally, the test cylinder 14 can be pressed manually to make the end of the fork 15 drive the aluminum connecting rod 2 to move downward, and move upward under the buoyancy of the hydraulic oil. When the permanent magnet 13 on the aluminum connecting rod 2 passes through a certain reed switch 12, a certain signal is triggered, thereby performing a performance test of the relay.

[0021] The bottom center of the square column 3 is connected to a vertical guide rod 16 , and the bottoms of the first float 1 and the aluminum connecting rod 2 are slidably matched with the guide rod 16 .

[0022] A shield 17 is provided at the bottom of the body 4, and evenly distributed through holes 18 are provided on the shield 17. The shield 17 is located in the transformer box, and the first float 1 is located in the shield 17. The shield can protect the internal parts of the relay and prevent impurities from entering therein.

[0023] The working process of the automatic exhaust relay is as follows: when the oil level drops, the second float 6 moves down first, and the ejector pin 7 is separated from the exhaust shield 9 to discharge the excess gas, which can avoid the false oil shortage phenomenon caused by the oil level drop due to excessive gas. After the gas is discharged, it can return to its original position and will not trigger the first reed switch 12, thereby avoiding the occurrence of false oil level alarm. When the real oil shortage phenomenon occurs, the oil level continues to drop, the first float 1 drops and drives the permanent magnet 13 on the aluminum connecting rod 2 to move downward, the first reed switch 12 is triggered, and an oil shortage alarm signal is generated; when the oil level continues to drop, the permanent magnet 13 continues to move downward, the second reed switch 12 is triggered, and a transformer power-off signal is generated to prevent the transformer from being damaged due to lack of oil.

Claims

1. A double-float automatic exhaust oil level monitoring relay, characterized in that: A square column (3) connected to the top is provided at the center of the inner cavity of the relay body (4); an aluminum connecting rod (2) is slidably connected to the square column (3); the lower end of the aluminum connecting rod (2) is connected to the first float (1), and the upper end is connected to the trigger component of the relay trigger mechanism; a guide sleeve (5) is fixedly connected to the side end of the square column (3); a second float (6) is slidably connected inside the guide sleeve (5); a ejector pin (7) is provided above the second float (6); a deflation shield (9) is provided at the top of the body (4); when the second float (6) is at a high position, the ejector pin (7) cooperates with the deflation shield (9) to deflate; when the second float (6) is at a low position, the ejector pin (7) is separated from the deflation shield (9), and the bottom surface of the second float (6) is seated on a bracket (10); the bracket (10) is fixedly connected to the square column (3).

2. The double-float automatic exhaust oil level monitoring relay according to claim 1 is characterized in that: The degassing shield (9) is provided with a vent hole, a sealing rubber ring (8) is provided at the inlet end of the vent hole, and the ejector pin (7) is plugged and matched with the sealing rubber ring (8) in a sealing manner.

3. The double-float automatic exhaust oil level monitoring relay according to claim 1 is characterized in that: The relay trigger mechanism comprises a fixed part and a trigger part; the fixed part is composed of a bent plate (11) and a reed switch (12), the horizontal surface of the bent plate (11) is positioned on the top surface of the cavity of the body (4), the vertical surface of the bent plate (11) positions two parallel reed switches (12), and one end pin of the reed switch (12) is connected to an external signal line; the trigger part is a permanent magnet (13), and the reed in each reed switch (12) is located on the moving path of the permanent magnet (13).

4. The double-float automatic exhaust oil level monitoring relay according to claim 1 is characterized in that: A test cylinder (14) is provided on the upper surface of the body (4). A spring needle seal on the test cylinder (14) is inserted into the inner cavity of the body (4) and connected to a shift fork (15). The end of the shift fork (15) contacts the top of the aluminum connecting rod (2).

5. The double-float automatic exhaust oil level monitoring relay according to claim 4 is characterized in that: The top of the aluminum connecting rod (2) is provided with a horizontal bending surface, the end of the shift fork (15) is provided with an open groove, the open groove is slidably matched with the square column (3), and the end of the shift fork (15) is in contact with the bending surface at the top of the aluminum connecting rod (2).

6. The double-float automatic exhaust oil level monitoring relay according to claim 1 is characterized in that: The bottom center of the square column (3) is connected to a vertical guide rod (16), and the bottom of the first float (1) and the aluminum connecting rod (2) are slidably matched with the guide rod (16).

7. The double-float automatic exhaust oil level monitoring relay according to claim 1 is characterized in that: A shield (17) is provided at the bottom of the body (4), and evenly distributed through holes (18) are provided on the shield (17). The shield (17) is located in the transformer box, and the first float (1) is located in the shield (17).

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