A corner measuring mechanism and gas relay

Abstract

The utility model relates to a gas relay technical field especially a corner measuring mechanism and gas relay, including, panel, be equipped with inner contact strip and outer contact strip on the panel, measure the pivot, measure the pivot rotation is equipped with the center of panel, be equipped with the connecting plate on the measure pivot, be equipped with outer contact and inner contact on the connecting plate, the outer contact strip is resistance body, and, relay main part, be equipped with relay pivot on the relay main part, be equipped with the shaft coupling on the relay pivot, the shaft coupling and measure the pivot are connected, installed the corner measuring mechanism on the relay pivot of QJ gas relay, can only observe the heavy gas alarm in the gas protection process of QJ gas relay, converts into the continuous quantity that can be observed in real time, namely the current size of corner measuring mechanism output, and the running state and fault development process of transformer before heavy gas fault occurs are convenient for judging.

Description

Technical Field

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

[0002] The QJ-type gas relay is an important non-electrical protection device in transformers. It can quickly detect internal faults in the transformer and issue alarm or trip signals. It is installed on the pipeline between the transformer tank and the oil conservator.

[0003] A severe internal fault in the transformer generates a strong gas flow, causing a rapid surge of oil. This rapid surge impacts the baffle of the gas relay mounted on the pipeline. The baffle rotates under the impact of the transient surge, hitting a reed switch behind it. This causes the reed switch to close, triggering a heavy gas alarm and activating the switching element, thus tripping the transformer. However, if the reed switch becomes damp and short-circuited, it can cause the gas relay to malfunction. This malfunction will trigger the transformer's tripping mechanism, severely impacting its operation.

[0004] The traditional QJ-type gas relay heavy gas alarm only activates when a reed switch forms a closed circuit, resulting in a (0,1) switching state. This cannot determine the transformer's operating status or the fault's progression before the heavy gas fault occurs. Accidents caused by false heavy gas alarms leading to transformer tripping are frequent, severely impacting the transformer's stable operation.

[0005] Therefore, this invention proposes an angle measuring mechanism and a gas relay. Utility Model Content

[0006] In view of the problems existing in the above or prior art, this utility model is proposed.

[0007] Therefore, the purpose of this utility model is to provide an angle measuring mechanism.

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an angle measuring mechanism, comprising,

[0009] A panel, wherein the panel is provided with an inner contact strip and an outer contact strip;

[0010] A measuring shaft is rotatably positioned at the center of the panel.

[0011] The measuring shaft is provided with a connecting plate, and the connecting plate is provided with an outer contact and an inner contact;

[0012] The outer contact strip is a resistor.

[0013] In a preferred embodiment of the angle measuring mechanism of this utility model, the outer contact and the outer contact strip are slidably connected.

[0014] The inner contacts and inner contact strips are slidably connected.

[0015] As a preferred embodiment of the angle measuring mechanism of this utility model, the inner contact bar and the outer contact bar are both annular structures, and the centers of the inner contact bar and the outer contact bar are located at the same position, which are both the rotation axes of the measuring shaft.

[0016] In a preferred embodiment of the angle measuring mechanism of this utility model, the outer contact strip is disposed outside the inner contact strip.

[0017] As a preferred embodiment of the angle measuring mechanism of this utility model, the outer contact strip is provided with a second connecting strip;

[0018] The inner contact strip is provided with a first connecting strip.

[0019] In a preferred embodiment of the angle measuring mechanism of this utility model, the first connecting strip is provided with a first connecting head;

[0020] The second connecting strip is provided with a second connector.

[0021] The beneficial effects of the angle measuring mechanism of this utility model are as follows: When the object being measured rotates, the connecting plate on the angle measuring mechanism rotates, and the resistance of the angle measuring mechanism changes after it is connected to the circuit. Therefore, the output current of the angle measuring mechanism will continuously decrease. The rotation angle of the object being measured can be determined by judging the change in current. After combining it with the QJ type gas relay, it is convenient to judge whether the working state of the QJ type gas relay is normal based on the rotation angle of the relay shaft.

[0022] To solve the above-mentioned technical problems, this utility model also provides the following technical solution: a gas relay, including an angle measuring mechanism, and...

[0023] A relay body, wherein a relay shaft is provided on the relay body, and a coupling is provided on the relay shaft;

[0024] The coupling is connected to the measuring shaft.

[0025] As a preferred embodiment of the gas relay of this utility model, a relay baffle is provided on the relay shaft;

[0026] The relay baffle is equipped with a permanent magnet;

[0027] The relay body is provided with a mounting bracket, and the mounting bracket is provided with a reed switch.

[0028] In a preferred embodiment of the gas relay of this utility model, the first connector and the second connector are provided with transmission lines;

[0029] An amplifier is provided on the transmission line.

[0030] As a preferred embodiment of the gas relay of this utility model, the relay body is provided with a power supply terminal and a signal transmission terminal.

[0031] The transmission line is connected to the power supply terminal and the signal transmission terminal.

[0032] The beneficial effects of this utility model of gas relay are as follows: An angle measuring mechanism is installed on the relay shaft of the QJ gas relay, which can convert the heavy gas alarm (represented by 0 or 1) that is only observed during the gas protection process of the QJ gas relay into a continuous quantity that can be observed in real time, namely the magnitude of the current output by the angle measuring mechanism. It is also convenient to judge the operating status and fault development process of the transformer before the occurrence of heavy gas fault. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the overall structure of the angle measuring mechanism.

[0035] Figure 2 This is a schematic diagram of the structure of the gas relay baffle under heavy gas activation conditions.

[0036] Figure 3 This is a schematic diagram of the structure of the gas relay baffle in the state where no heavy gas operation has occurred. Detailed Implementation

[0037] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0038] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0039] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0040] Example 1, referring to Figure 1 This is the first embodiment of the present utility model. This embodiment provides a corner measuring mechanism, including a panel 1, on which an inner contact strip 11 and an outer contact strip 12 are provided;

[0041] Among them, the outer contact strip 12 is a resistive element.

[0042] Measuring shaft 2 is rotatably positioned at the center of panel 1;

[0043] The measuring shaft 2 is provided with a connecting plate 21, and the connecting plate 21 is provided with an outer contact 22 and an inner contact 23;

[0044] Specifically, the outer contact 22 and the outer contact strip 12 are slidably connected;

[0045] The inner contact 23 and the inner contact strip 11 are slidably connected.

[0046] Furthermore, both the inner contact bar 11 and the outer contact bar 12 are annular structures, and the centers of the inner contact bar 11 and the outer contact bar 12 are located at the same position, which is the rotation axis of the measuring shaft 2. Therefore, when the measuring shaft 2 rotates, the outer contact 22 can slide on the outer contact bar 12 to maintain the connection between the two, and the inner contact 23 can slide on the inner contact bar 11 to maintain the connection between the two.

[0047] The outer contact 12 is located outside the inner contact 11. Therefore, the outer contact 12 can have a greater length, thereby increasing the length of the resistive body and increasing the maximum resistance value.

[0048] Preferably, the outer contact strip 12 is provided with a second connecting strip 121; the inner contact strip 11 is provided with a first connecting strip 111. Both the second connecting strip 121 and the first connecting strip 111 are made of conductive material. The inner contact strip 11 is a complete annular structure, and the first connecting strip 111 and the inner contact strip 11 are electrically connected. The outer contact strip 12 is an annular structure with an opening. There are two second connecting strips 121, which are symmetrically arranged at both ends of the outer contact strip 12.

[0049] It should be noted that the first connecting strip 111 is provided with a first connector 112; the second connecting strip 121 is provided with a second connector 122.

[0050] Each of the two second connecting strips 121 is provided with a second connector 122.

[0051] In use, connect one of the second connectors 122 and the first connector 112 to the circuit via an external power supply. Initially, refer to... Figure 1 The outer contact 22 is located in the middle of the outer contact strip 12, and the inner contact 23 is located in the middle of the inner contact strip 11. The baffle shaft of the QJ gas relay is connected to the measuring shaft 2, that is, the rotating component to be measured is connected to the measuring shaft 2. When the rotating component to be measured rotates, it will drive the measuring shaft 2 to rotate together. When the measuring shaft 2 rotates, the outer contact 22 slides on the outer contact strip 12, and the inner contact 23 slides on the inner contact strip 11. The second connector 122 and the first connector... The heads 112 are connected to different polarities of the external power supply. The first connecting strip 111 and the inner contact strip 11 are conductors. The connecting plate 21 electrically connects the inner contact 23 and the outer contact 22. Due to the rotation of the connecting plate 21, the length of the outer contact strip 12 connected in the circuit will change. Since the outer contact strip 12 is a resistive element, the resistance will change with the length of the outer contact strip 12 connected in the circuit. Therefore, the rotation angle of the object being measured can be determined by judging the magnitude of the output current.

[0052] Specifically, after the object being measured rotates, the connecting plate 21 on the angle measuring mechanism rotates as well. After the angle measuring mechanism is connected to the circuit, its own resistance changes, thus the output current of the angle measuring mechanism continuously decreases. The relationship between the rotation angle of the object being measured and the output current of the angle measuring mechanism is as follows:

[0053]

[0054] Where I is the output current of the angle measuring mechanism; U is the rated voltage provided by the external power supply; θ is the angle of rotation of the object being measured; and R0 is half of the total internal resistance of the angle measuring mechanism.

[0055] Through transformation, we can obtain:

[0056]

[0057] The experiment can verify the relationship between the output current of the angle measuring mechanism and the angle of the baffle when the QJ gas relay operates under heavy gas conditions, and obtain the angle setting value when the QJ gas relay operates under heavy gas conditions.

[0058] In summary, the rotation angle measuring mechanism facilitates the measurement of the rotation angle of the object being measured.

[0059] Example 2, refer to Figures 1-3This is the second embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a gas relay, including an angle measuring mechanism and a relay body 3. The relay body 3 is provided with a relay shaft 31, and the relay shaft 31 is provided with a coupling 4. In this embodiment, the relay body 3 is a QJ gas relay.

[0060] Coupling 4 is connected to measuring shaft 2.

[0061] Specifically, a relay baffle 32 is provided on the relay shaft 31;

[0062] A permanent magnet 321 is provided on the relay baffle 32;

[0063] The relay body 3 is provided with a mounting bracket 331, and a reed switch 33 is provided on the mounting bracket 331.

[0064] When the rapidly surging oil flow impacts the relay baffle 32, the relay baffle 32 rotates, and the permanent magnet 321 located on the relay baffle 32 will touch the reed switch 33, causing the reed switch 33 to close and issue an alarm signal. Furthermore, when the relay baffle 32 rotates, it will drive the measuring shaft 2 to rotate through the relay shaft 31.

[0065] Furthermore, the first connector 112 and the second connector 122 are provided with transmission lines 13;

[0066] An amplifier 14 is provided on the transmission line 13. The amplifier 14 is used to amplify the weak current signal for transmission.

[0067] The relay body 3 is provided with a power supply terminal 34 and a signal transmission terminal 35;

[0068] The transmission line 13 is connected to the power supply terminal 34 and the signal transmission terminal 35.

[0069] In this embodiment, the transmission line 13 has two main functions: one is to transmit power, and the other is to transmit data.

[0070] It should be noted that the signal transmission terminal 35 is used to connect to the signal processing and display device. The signal processing and display device receives the current signal and heavy gas signal from the angle measuring mechanism and displays their values. It can display the current signal output by the angle measuring mechanism and also display the heavy gas alarm. The switch quantity is represented by 0 or 1. It is used in conjunction with the current signal output by the angle measuring mechanism and the heavy gas alarm status to determine whether the alarm is a normal action of the heavy gas, or a false alarm or failure to act.

[0071] The power supply terminal 34 is used to connect to the power supply and provide power to the equipment.

[0072] The rest of the structure is the same as in Example 1.

[0073] When using the QJ gas relay, if a heavy gas alarm is triggered, it is necessary to observe whether the angle of the relay baffle 32 has reached the set value. If the QJ gas relay issues a heavy gas alarm but the angle of the relay baffle 32 has not reached the set value, the signal processing unit will output a false alarm message. If the QJ gas relay does not issue a heavy gas alarm but the angle of the relay baffle 32 has reached the set value, the signal processing unit will output a false alarm message. If the QJ gas relay issues a heavy gas alarm and the angle of the relay baffle 32 has reached the set value, the signal processing unit will output a confirmed heavy gas alarm message. This invention can effectively distinguish between normal operation, false operation, and false alarm of the QJ gas relay during heavy gas alarms, thereby improving the accuracy of the QJ gas relay alarm.

[0074] This utility model installs an angle measuring mechanism at the baffle 32 of the QJ-type gas relay. The angle measuring mechanism is connected to a display device, which can convert the switch quantity of the heavy gas alarm (0,1) that is only observed during the gas protection process of the QJ-type gas relay into a continuous quantity that can be observed in real time, namely the angle of the relay baffle 32, so as to judge the operating status and fault development process of the transformer before the occurrence of heavy gas fault.

[0075] Simultaneously, the rotation angle of relay baffle 32 is used to determine whether the heavy gas circuit operates normally, malfunctions, or fails to operate: if the rotation angle of relay baffle 32 reaches the alarm angle and the heavy gas circuit activates, it is a normal operation; if the rotation angle of relay baffle 32 reaches the alarm angle but the heavy gas circuit does not activate, it is a failure to operate; if the rotation angle of relay baffle 32 does not reach the alarm angle but the heavy gas circuit activates, it is a malfunction; if the rotation angle of relay baffle 32 does not reach the alarm angle and the heavy gas circuit does not activate, it is a normal operation, so as to determine whether the transformer stops working when it receives a heavy gas signal.

[0076] In summary, this utility model installs an angle measuring mechanism on the relay shaft 31 of the QJ gas relay, which can convert the heavy gas alarm (represented by 0 or 1) that is only observed during the gas protection process of the QJ gas relay into a continuous quantity that can be observed in real time, namely the magnitude of the current output by the angle measuring mechanism.

[0077] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An angle measuring mechanism, characterized in that: include, Panel (1), wherein the panel (1) is provided with an inner contact strip (11) and an outer contact strip (12); Measuring shaft (2), which is rotatably located at the center of the panel (1); The measuring shaft (2) is provided with a connecting plate (21), and the connecting plate (21) is provided with an outer contact (22) and an inner contact (23); The outer contact strip (12) is a resistor.

2. The angle measuring mechanism as described in claim 1, characterized in that: The outer contact (22) and the outer contact strip (12) are slidably connected; The inner contact (23) and the inner contact strip (11) are slidably connected.

3. The angle measuring mechanism as described in claim 2, characterized in that: Both the inner contact bar (11) and the outer contact bar (12) are annular structures, and the centers of the inner contact bar (11) and the outer contact bar (12) are located at the same position, which are the rotation axes of the measuring shaft (2).

4. The angle measuring mechanism as described in claim 3, characterized in that: The outer contact strip (12) is located outside the inner contact strip (11).

5. The angle measuring mechanism as described in any one of claims 1 to 4, characterized in that: The outer contact strip (12) is provided with a second connecting strip (121); The inner contact strip (11) is provided with a first connecting strip (111).

6. The angle measuring mechanism as described in claim 5, characterized in that: The first connecting strip (111) is provided with a first connector (112); The second connecting strip (121) is provided with a second connector (122).

7. A gas relay, characterized in that: Including the angle measuring mechanism as described in claim 6, and, A relay body (3) is provided on the relay body (3), and a relay shaft (31) is provided on the relay shaft (31); The coupling (4) is connected to the measuring shaft (2).

8. The gas relay as described in claim 7, characterized in that: A relay baffle (32) is provided on the relay shaft (31); The relay baffle (32) is provided with a permanent magnet (321); The relay body (3) is provided with a mounting bracket (331), and the mounting bracket (331) is provided with a reed switch (33).

9. The gas relay as described in claim 7 or 8, characterized in that: The first connector (112) and the second connector (122) are provided with transmission lines (13); An amplifier (14) is provided on the transmission line (13).

10. The gas relay as described in claim 9, characterized in that: The relay body (3) is provided with a power supply terminal (34) and a signal transmission terminal (35); The transmission line (13) is connected to the power supply terminal (34) and the signal transmission terminal (35).

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