Measuring mechanism and gas relay

Abstract

The utility model relates to the relay protection field, and discloses a measuring mechanism and a gas relay, the measuring mechanism comprises a rotation part and an external connection part, the external connection part is installed at the outer side of the rotation part, the external connection part comprises a connection assembly and a conversion assembly installed at the outer side of the connection assembly, the rotation part comprises a baffle plate, and the baffle plate is installed at the outer side of the connection assembly. The side plates are fixedly connected to the outer sides of the baffles; the displacement data of the baffle plate is measured by using the linear displacement sensor, and the displacement data is converted into the angle data by using the displacement-rotation angle conversion relational expression, so that the rotation angle of the baffle plate can be detected in real time, and the operation state and the fault development process of the transformer before the heavy gas fault can be judged; therefore, the tripping accident of the main transformer caused by the heavy gas misoperation is prevented, and the stable operation of the transformer is prevented from being influenced.

Description

Technical Field

[0001] This utility model relates to the field of relay protection, and in particular to a measuring mechanism and a gas relay. Background Technology

[0002] The double float gas relay is a relay protection device used in oil-immersed transformers and on-load tap changers, and is installed on the pipeline between the transformer oil tank and the oil conservator.

[0003] When a fault occurs inside the transformer, causing an oil surge, the rapidly surging oil flow rushes from the transformer tank to the oil conservator, impacting the double float gas relay installed on the pipeline. The baffle of the double float gas relay rotates under the impact of the transient surge of oil flow, hitting the reed switch behind the baffle, connecting the relay protection circuit, and issuing a heavy gas alarm signal.

[0004] As an important non-electrical protection device in transformers, the traditional double-float gas relay alarm only occurs when a reed switch forms a closed circuit, which is a (0,1) switching quantity. It cannot determine the transformer's operating status and fault development process before the occurrence of a heavy gas fault. Accidents caused by false tripping of the main transformer due to heavy gas faults occur frequently, seriously affecting the stable operation of the transformer. Utility Model Content

[0005] Therefore, the technical problem to be solved by this utility model is: how to determine the operating status and fault development process of a dual-float gas relay before a serious gas fault occurs.

[0006] The above-mentioned technical problems are solved by the following technical solution: This utility model proposes a measuring mechanism, which includes a rotating component and an external component;

[0007] The external component is mounted on the outside of the rotating component;

[0008] The external component includes a connection assembly and a conversion assembly mounted on the outside of the connection assembly.

[0009] In a preferred embodiment of the measuring mechanism of this utility model: the rotating component includes a baffle and a side plate fixedly connected to the outside of the baffle.

[0010] In a preferred embodiment of the measuring mechanism of this utility model: the connecting assembly includes a connecting block fixedly connected to the outside of the baffle, and a connecting rod hinged to the outside of the connecting block.

[0011] In a preferred embodiment of the measuring mechanism of this utility model: the conversion component includes a linear displacement sensor disposed on the outside of the baffle, a pull rod adapted to be installed on the outside of the linear displacement sensor, and a transmission line adapted to be installed on the outside of the linear displacement sensor;

[0012] The connecting rod is hinged to the outside of the connecting block.

[0013] This utility model also provides a gas relay.

[0014] In a preferred embodiment of the gas relay described in this utility model: a gas relay includes the aforementioned measuring mechanism, and further includes,

[0015] The overall mechanism includes a main body component mounted on the outside of the rotating component, a response component mounted on the outside of the main body component, and an auxiliary component mounted on the outside of the main body component;

[0016] An alarm mechanism, comprising a drive component mounted on the outside of the main body component, and a trigger component mounted on the outside of the drive component.

[0017] In a preferred embodiment of the gas relay of this utility model: the main component includes a relay disposed on the outside of the baffle, and a frame adapted to be installed on the outside of the relay;

[0018] The baffle is hinged to the outside of the frame, and the linear displacement sensor is fixedly connected to the outside of the frame.

[0019] In a preferred embodiment of the gas relay of this utility model: the response component includes a mounting base fixedly connected to the outside of the frame, and a reed switch adapted to be mounted on the outside of the mounting base.

[0020] In a preferred embodiment of the gas relay of this utility model: the auxiliary component includes a horizontal plate fixedly connected to the outside of the frame, and an upper float ball hinged to the outside of the frame.

[0021] In a preferred embodiment of the gas relay of this utility model: the driving component includes a support beam hinged to the outside of the frame, and a lower float ball fixedly connected to the outside of the support beam.

[0022] In a preferred embodiment of the gas relay of this utility model: the alarm mechanism includes a mounting block fixedly connected to the outside of the support beam, and a permanent magnet adapted to be installed on the outside of the mounting block.

[0023] The beneficial effects of this utility model are as follows: by using a linear displacement sensor to measure the displacement data of the baffle and using the displacement-angle conversion formula to convert the displacement data into angle data, the rotation angle of the baffle can be detected in real time. This allows for the determination of the transformer's operating status and fault development process before a heavy gas fault occurs, thus preventing accidental tripping of the main transformer due to malfunctions caused by heavy gas faults and preventing any impact on the stable operation of the transformer. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments of this utility model will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this utility model and are not intended to limit the scope of this utility model. Wherein:

[0025] Figure 1 A schematic diagram of the overall structure of this utility model is shown;

[0026] Figure 2 A schematic diagram of the lower float ball before its movement is shown.

[0027] Figure 3 A schematic diagram of the external components of this utility model is shown;

[0028] Figure 4 A schematic diagram of the lower float ball after its movement is shown. Detailed Implementation

[0029] To enable those skilled in the art to better understand this utility model, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0030] The terminology used in this invention refers to those general terms currently widely used in the art in consideration of the functionality of this invention; however, these terms may vary according to the intent, precedent, or new technology of those skilled in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of this invention. Therefore, the terminology used in this specification should not be construed as simple names, but rather based on the meaning of the terms and the overall description of this invention.

[0031] Reference Figure 1 , Figure 3 and Figure 4 This embodiment provides a measuring mechanism, including a rotating component 1 and an external component 2;

[0032] External component 2 is installed on the outside of rotating component 1;

[0033] The external component 2 includes a connection assembly 21 and a conversion assembly 22 mounted on the outside of the connection assembly 21.

[0034] The rotating component 1 includes a baffle 11 and a side plate 12 fixedly connected to the outside of the baffle 11.

[0035] The connecting assembly 21 includes a connecting block 211 fixedly connected to the outside of the baffle 11, and a connecting rod 212 hinged to the outside of the connecting block 211.

[0036] The conversion assembly 22 includes a linear displacement sensor 221 disposed on the outside of the baffle 11, a pull rod 222 adapted to be installed on the outside of the linear displacement sensor 221, and a transmission line 223 adapted to be installed on the outside of the linear displacement sensor 221.

[0037] The connecting rod 212 is hinged to the outside of the connecting block 211.

[0038] Among them, the linear displacement sensor 221 model can be selected as MIRAN KTM-50mm / a70, with a measuring range of 50mm, which can meet the measurement requirements of the rotation of baffle 11.

[0039] Transmission line 223 is the signal transmission part of linear displacement sensor 221. Linear displacement sensor 221 can monitor the displacement data of pull rod 222 within linear displacement sensor 221 and transmit the data outward through transmission line 223.

[0040] When the baffle 11 rotates during use, the conversion component 22 can convert the rotation of the baffle 11 around the axis of rotation into the sliding of the pull rod 222 within the linear displacement sensor 221.

[0041] In the initial state, the angle between connecting rod 212 and the vertical line is 75°. The distance between the connection point of connecting block 211 and baffle 11 and the center of rotation of baffle 11 is l1, the length of connecting rod 212 is l2, the horizontal displacement of tie rod 222 is d, and the rotation angle of baffle 11 is α. The rotation angle α of baffle 11 and the horizontal displacement d of tie rod 222 satisfy the following relationship:

[0042] d+l2[cos(75°-α)-cos 75°]=l1 sinα

[0043] Therefore, by substituting the data detected by the linear displacement sensor 221 into the above formula, the rotation angle of the baffle 11 can be calculated as α.

[0044] Reference Figures 1-4 This embodiment provides a measuring mechanism, including a measuring mechanism, and further including,

[0045] The overall mechanism 3 includes a main body component 31 installed on the outside of the rotating component 1, a response component 32 installed on the outside of the main body component 31, and an auxiliary component 33 installed on the outside of the main body component 31.

[0046] Alarm mechanism 4 includes a drive component 41 installed on the outside of the main body component 31, and a trigger component 42 installed on the outside of the drive component 41.

[0047] The main component 31 includes a relay 311 disposed on the outside of the baffle 11, and a frame 312 adapted to be installed on the outside of the relay 311.

[0048] The baffle 11 is hinged to the outside of the frame 312, and the linear displacement sensor 221 is fixedly connected to the outside of the frame 312.

[0049] A terminal block is provided on the outside of the relay 311. One end of the transmission line 223 is connected to the terminal block, and the other end is connected to the linear displacement sensor 221. Two lines are arranged on the terminal block. One line is connected to the transmission line 223 and can receive the displacement data of the baffle 11 measured by the linear displacement sensor 221. The other line is connected to the display device and is responsible for transmitting the displacement data of the baffle 11 to the display device.

[0050] The display device has a built-in displacement-angle conversion formula, which can convert the received displacement data of the baffle 11 into the angle of the baffle 11 and display it on the screen.

[0051] By using the linear displacement sensor 221 to measure the displacement data of the baffle 11 and converting the displacement data into angle data using the displacement-angle conversion formula, the rotation angle of the baffle 11 can be detected in real time. This allows the transformer to determine its operating status and fault development process before a heavy gas fault occurs, thus preventing accidental tripping of the main transformer due to malfunction of heavy gas operation and preventing any impact on the stable operation of the transformer.

[0052] As one embodiment provided in this application, such as Figures 1-4 The response component 32 includes a mounting base 321 fixedly connected to the outside of the frame 312, and a reed switch 322 adapted to be mounted on the outside of the mounting base 321.

[0053] The auxiliary component 33 includes a horizontal plate 331 fixedly connected to the outside of the frame 312, and an upper floating ball 332 hinged to the outside of the frame 312.

[0054] The drive component 41 includes a support beam 411 hinged to the outside of the frame 312, and a lower float ball 412 fixedly connected to the outside of the support beam 411.

[0055] The alarm mechanism 4 includes a mounting block 421 fixedly connected to the outside of the support beam 411, and a permanent magnet 422 adapted to be installed on the outside of the mounting block 421.

[0056] When an internal fault occurs in the transformer, causing an oil surge, the baffle 11 rotates under the impact of the rapidly surging oil flow. This causes the baffle 11 to drive the side plate 12 to rotate. When the side plate 12 touches and presses against the support beam 411, it will drive the lower float 412 to rotate through the support beam 411. Figure 2 Position change is attached Figure 4 At this position, the support beam 411 drives the mounting block 421 to rotate. When the mounting block 421 rotates to the point where the permanent magnet 422 contacts the reed switch 322, a heavy gas alarm signal can be generated.

[0057] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of this utility model.

Claims

1. A measuring mechanism, characterized in that: It includes a rotating component (1) and an external component (2); The external component (2) is installed on the outside of the rotating component (1); The external component (2) includes a connection assembly (21) and a conversion assembly (22) mounted on the outside of the connection assembly (21). The rotating component (1) includes a baffle (11) and a side plate (12) fixedly connected to the outside of the baffle (11). The connecting assembly (21) includes a connecting block (211) fixedly connected to the outside of the baffle (11), and a connecting rod (212) hinged to the outside of the connecting block (211). The conversion assembly (22) includes a linear displacement sensor (221) disposed outside the baffle (11), a pull rod (222) adapted to be installed outside the linear displacement sensor (221), and a transmission line (223) adapted to be installed outside the linear displacement sensor (221). The connecting rod (212) is hinged to the outside of the connecting block (211).

2. A gas relay, characterized in that: Including the measuring mechanism of claim 1, it further includes, The overall mechanism (3) includes a main body component (31) mounted on the outside of the rotating component (1), a response component (32) mounted on the outside of the main body component (31), and an auxiliary component (33) mounted on the outside of the main body component (31). An alarm mechanism (4) includes a drive component (41) mounted on the outside of the main body component (31) and a trigger component (42) mounted on the outside of the drive component (41).

3. The gas relay according to claim 2, characterized in that: The main component (31) includes a relay (311) disposed outside the baffle (11) and a frame (312) adapted to be installed outside the relay (311). The baffle (11) is hinged to the outside of the frame (312), and the linear displacement sensor (221) is fixedly connected to the outside of the frame (312).

4. The gas relay according to claim 3, characterized in that: The response component (32) includes a mounting base (321) fixedly connected to the outside of the frame (312), and a reed switch (322) adapted to be mounted on the outside of the mounting base (321).

5. The gas relay according to claim 4, characterized in that: The auxiliary component (33) includes a horizontal plate (331) fixedly connected to the outside of the frame (312) and an upper floating ball (332) hinged to the outside of the frame (312).

6. The gas relay according to claim 5, characterized in that: The drive component (41) includes a support beam (411) hinged to the outside of the frame (312) and a lower float (412) fixedly connected to the outside of the support beam (411).

7. The gas relay according to claim 6, characterized in that: The alarm mechanism (4) includes a mounting block (421) fixedly connected to the outside of the support beam (411), and a permanent magnet (422) adapted to be installed on the outside of the mounting block (421).

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