Protection instrument taking oil level change in transformer expansion tank as electrical signal

Abstract

The utility model provides a protection instrument taking oil level change in a transformer expansion tank as an electrical signal, which comprises an instrument body and a shell, the instrument body is connected with the shell through a bolt, a front trigger mechanism is arranged in the instrument body, a wiring mechanism is arranged at the top of the instrument body, the wiring mechanism comprises a terminal mounting plate, and the terminal mounting plate is connected with the shell through a bolt. The front triggering mechanism comprises a front shaft, a first annular magnet and a microswitch are installed on the outer wall of the front shaft, and the front triggering mechanism comprises a rear shaft and a second annular magnet installed on the outer wall of the rear shaft. According to the protection instrument taking the change of the oil level in the transformer expansion tank as the electrical signal, oil level feedback is carried out through position floating of a suspension ball in the suspension mechanism on the oil level, and after magnetic attraction transmission of a first annular magnet and a second annular magnet is utilized, a microswitch is connected with a circuit of a wiring mechanism through a lead; therefore, the oil level position of the oil conservator of the transformer can be displayed and alarmed in time.

Description

Technical Field

[0001] This utility model relates to the technical field, and in particular to a protection instrument that uses changes in the oil level inside a transformer oil conservator as an electrical signal. Background Technology

[0002] Transformer oil plays a crucial role in insulation and heat dissipation within transformers. If a drop in the oil level within the conservator goes undetected and unannounced, the oil level inside the transformer may gradually decrease to a dangerous level. This exposes energized components such as windings to air, whose insulating properties are far inferior to transformer oil, easily leading to partial discharge. Over time, the insulation materials will age rapidly due to the heat and chemical erosion generated by partial discharge, resulting in a continuous decline in insulation performance. Ultimately, this can lead to insulation breakdown, short circuits, transformer damage, and even serious accidents such as fires. Therefore, timely feedback and alarms regarding transformer oil levels are extremely important. Utility Model Content

[0003] The purpose of this invention is to provide a protection instrument that uses changes in the oil level in a transformer oil conservator as an electrical signal. This device can provide timely feedback and alarm for changes in oil level.

[0004] This utility model provides a protection instrument that uses changes in the oil level within a transformer oil conservator as an electrical signal. It includes a meter body and a housing, the meter body and housing being connected by bolts. A front trigger mechanism is installed inside the meter body, and a wiring mechanism is provided on the top of the meter body. The wiring mechanism includes a terminal mounting plate. The front trigger mechanism includes a front shaft, and a first annular magnet and a micro switch are mounted on the outer wall of the front shaft. A rear trigger mechanism is installed inside the housing, and the front trigger mechanism includes a rear shaft and a second annular magnet mounted on its outer wall. A transmission mechanism is installed outside the housing, and the transmission mechanism includes a first rotating shaft and a second rotating shaft, connected by gear transmission. The second rotating shaft is connected to the rear shaft by bolts. A suspension mechanism is bolted to the first rotating shaft, and the suspension mechanism includes a suspension ball and a suspension rod. The suspension ball transmits the buoyancy of the oil level to the first rotating shaft through the suspension rod, causing it to rotate. The first rotating shaft drives the second rotating shaft and the rear shaft to rotate. The rear shaft, through magnetic force, drives the front shaft to trigger the micro switch, and the micro switch transmits an electrical signal to the terminal mounting plate.

[0005] As a further optimization, the suspension assembly includes a suspension rod, one end of which has a suspension ball mounted on its outer wall, and the other end of which is connected to a first connecting shaft via a connecting bolt.

[0006] As a further optimization, the transmission mechanism includes a mounting bracket and a second rotating shaft. The mounting bracket is mounted on the housing, and a first rotating shaft is mounted on the mounting bracket. A crown gear is mounted on the outer wall of the first rotating shaft. The second rotating shaft is movably mounted on the housing, and a cylindrical gear is mounted on the outer wall of the second rotating shaft. The cylindrical gear meshes with the crown gear.

[0007] As a further optimization, the rear triggering mechanism includes a rear shaft, which is movably installed inside the housing. The rear shaft is connected to a second rotating shaft, and a second fixing bracket is bolted to the outer wall of the rear shaft. Both ends of the second fixing bracket are bolted with a second annular magnet.

[0008] As a further optimization, the front trigger mechanism includes a front shaft and a mounting plate. The mounting plate is installed inside the watch body and a micro switch is mounted on the mounting plate. The front shaft is movably installed inside the watch body. A first fixing bracket is mounted on the outer wall of the front shaft near the rear shaft. Both ends of the first fixing bracket are bolted with a first annular magnet. The position of the first annular magnet corresponds to the position of the second annular magnet. A needle roller mounting wheel is mounted on the outer wall of the front shaft, and a needle roller is mounted on the needle roller. The outer wall of the needle roller is connected to the micro switch. A mounting base plate is mounted on the end of the front shaft away from the first fixing bracket.

[0009] As a further optimization, the wiring mechanism includes a junction box, which is installed on the top of the meter body. A terminal mounting plate is installed inside the junction box, and a wiring terminal is installed on the terminal mounting plate. The wiring terminal is electrically connected to a micro switch via a lead wire, and a cable outlet is installed on the side wall of the junction box.

[0010] As a further optimization, a limiting mechanism is installed on the first rotating shaft and the mounting bracket. The limiting mechanism includes a limiting plate and limiting screws. The limiting plate is installed on the outer wall of the first rotating shaft. The side wall of the limiting plate has three limiting holes. There are three limiting screws. The limiting screws are installed on the mounting bracket and correspond to the positions of the limiting holes. The limiting screws pass through the limiting holes.

[0011] As a further optimization, a display mechanism is provided inside the watch body near the front trigger mechanism. The display mechanism includes a dial and a viewing glass. The dial is mounted on a mounting plate, and the viewing glass is mounted on the side end face of the watch body.

[0012] This invention provides a protection instrument that uses changes in the oil level within a transformer oil conservator as an electrical signal. Compared with existing technologies, it has the following improvements and advantages: This protection instrument uses changes in the oil level within a transformer oil conservator as an electrical signal. It provides oil level feedback by having a suspended ball in a suspension mechanism float on the oil surface. The transmission mechanism drives the rear shaft trigger mechanism to rotate. The magnetic attraction between the first and second annular magnets drives the front shaft of the front trigger mechanism to rotate. This rotation triggers a micro switch, which connects to the wiring mechanism via a lead wire. This energizes the external alarm components on the micro switch, enabling timely display and alarm of the oil level position within the transformer oil conservator. Attached Figure Description

[0013] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This utility model Figure 1 A schematic diagram of the symmetrical view structure;

[0016] Figure 3 This utility model Figure 1 An enlarged schematic diagram of the structure at point A;

[0017] Figure 4 This is a schematic diagram of the internal structure of this utility model;

[0018] Figure 5 This is a schematic diagram of the side of the meter body and the wiring mechanism of this utility model;

[0019] Figure 6 This is a structural diagram showing the installation position of the limiting mechanism of this utility model;

[0020] Figure 7 This is a schematic diagram of the front triggering mechanism of this utility model.

[0021] Figure 8 This is a schematic diagram of the limiting mechanism structure of this utility model.

[0022] Figure 9 This is a simplified circuit diagram showing the connection between the micro switch and the terminal block of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1-Meter body, 2-Wiring mechanism, 21-Terminal mounting plate, 22-Outlet cable gland, 23-Junction box, 24-Wire terminal, 3-Suspension mechanism, 31-Suspension rod, 32-Suspension ball, 33-Connecting bolt, 4-Front trigger mechanism, 41-First fixing bracket, 42-First annular magnet, 43-Front shaft, 44-Micro switch, 45-Mounting plate, 46-Needle roller, 47-Needle roller mounting wheel, 48-Mounting base plate, 5-Rear trigger mechanism, 51-Rear shaft, 52-Second fixing bracket, 53-Second annular magnet, 6-Display mechanism, 61-Dial, 62-Viewing glass, 7-Transmission mechanism, 71-Crown gear, 72-Mounting bracket, 73-First rotating shaft, 74-Spiral gear, 75-Second rotating shaft, 8-Outer shell, 9-Limiting mechanism, 91-Limiting plate, 92-Limiting screw, 93-Limiting hole. Detailed Implementation

[0025] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Please see Figure 1-9 This utility model provides a technical solution for a protection instrument that uses changes in the oil level within a transformer oil conservator as an electrical signal, such as... Figure 1 and Figure 2 As shown, the instrument includes a body 1 and a housing 8, which together form the main support structure. The body 1 and housing 8 are connected by bolts. A front trigger mechanism 4 is installed inside the body 1, used to trigger an electrical signal. A wiring mechanism 2 is located on the top of the body 1, electrically connected to the front trigger mechanism 4. When the front trigger mechanism 4 is triggered, it energizes the wiring mechanism 2. The wiring mechanism 2 includes a terminal mounting plate 21, which is a wiring mechanism for connecting alarm components such as solenoid valves, alarm lights, or alarm bells. The front trigger mechanism 4 includes a front shaft 43, on the outer wall of which a first annular magnet 42 and a micro switch 44 are mounted. A rear trigger mechanism 5 is installed inside the housing 8. (See reference...) Figure 4In the state where the rear trigger mechanism 5 cooperates with the front trigger mechanism 4, a transmission action is generated. The rear trigger mechanism 5 includes a rear shaft 51 and a second annular magnet 53 installed on its outer wall. The rear shaft 51 in the rear trigger mechanism 5 is driven by the suspension mechanism 3 and the transmission mechanism 7. The rear shaft 51 drives the second annular magnet 53 to rotate. The second annular magnet 53 and the first annular magnet 42 have opposite poles of magnetism, that is, they attract each other. They are also magnetically attracted to the watch body 1 through the outer shell 8. Therefore, when the second annular magnet 53 rotates, it also drives the first annular magnet 42 to rotate. The transmission mechanism 7 is installed on the outside of the outer shell 8. The transmission mechanism 7 transmits the buoyancy generated by the suspension mechanism 3 to the rear trigger mechanism 5. The transmission mechanism 7 includes a first rotating shaft 73 and a second rotating shaft 75. The first rotating shaft 73 and the second rotating shaft 75 are connected by gear transmission. The suspension mechanism 3 transmits the buoyancy... The force is transmitted to the first rotating shaft 73, which drives the second rotating shaft 75 to rotate via gear transmission, thereby realizing the change of rotation direction. The second rotating shaft 75 is connected to the rear shaft 51 by bolts. A suspension mechanism 3 is installed on the first rotating shaft 73 by bolts. The suspension mechanism 3 feeds back the buoyancy of the oil surface to the transmission mechanism 7. The suspension mechanism 3 includes a suspension ball 32 and a suspension rod 31. The suspension ball 32 floats on the oil surface with the oil level and can provide feedback on the position of the oil surface. The suspension rod 31 transmits the buoyancy. The suspension ball 32 transmits the buoyancy of the oil surface to the first rotating shaft 73 through the suspension rod 31, causing it to rotate. The first rotating shaft 73 drives the second rotating shaft 75 and the rear shaft 51 to rotate. The rear shaft 51 drives the front shaft 43 to trigger the micro switch 44 through magnetic force. The micro switch 44 transmits the electrical signal to the terminal mounting plate 21.

[0029] Combination Figure 2 and Figure 4 As shown, the suspension ball 32 in the suspension mechanism 3 floats on the oil surface to provide oil level feedback. The buoyancy is transmitted to the first rotating shaft 73 through the suspension rod 31, causing it to rotate. The rotation direction of the first rotating shaft 73 is changed by gears, which drives the second rotating shaft 75 to rotate. The rotation of the second rotating shaft 75 drives the rear shaft 51 to rotate. The rear shaft 51 drives the second annular magnet 53 to rotate. The second annular magnet 53 drives the first annular magnet 42 to rotate through magnetism. After the front shaft 43 rotates, it triggers the micro switch 44. The micro switch 44 transmits an electrical signal to the terminal mounting plate 21 of the wiring mechanism 2 through the lead wire, so as to express the oil level position in the oil tank in the form of an electrical signal.

[0030] like Figure 2As shown, in order to provide feedback on the oil level in the transformer oil conservator, a suspension assembly 3 is used to follow the oil level position. The suspension assembly 3 includes a suspension rod 31, and a suspension ball 32 is installed on the outer wall of one end of the suspension rod 31. The suspension ball 32 is made of hollow rubber and can float on the oil surface. The buoyancy of the suspension ball 32 is transmitted to the first connecting shaft 73 through the suspension rod 31, which drives the first connecting shaft 73 to rotate. The other end of the suspension rod 31 is connected to the first connecting shaft 73 through a connecting bolt 33 to provide real-time feedback on the oil level position.

[0031] like Figure 2 As shown, in order to transmit the longitudinal buoyancy force of the suspension mechanism 3 and adjust the rotation direction, a transmission mechanism 7 is used to transmit the force. The transmission mechanism 7 includes a mounting frame 72 and a second rotating shaft 75. The mounting frame 72 is the carrier structure of the transmission mechanism 7. The mounting frame 72 is mounted on the outer shell 8. A first rotating shaft 73 is mounted on the mounting frame 72. A crown gear 71 is mounted on the outer wall of the first rotating shaft 73. The second rotating shaft 75 is movably mounted on the outer shell 8. A cylindrical gear 74 is mounted on the outer wall of the second rotating shaft 75. The cylindrical gear 74 meshes with the crown gear 71. The meshing of the two performs the conversion of the rotation direction.

[0032] When the suspension rod 31 moves longitudinally, it drives the first rotating shaft 73 and the crown gear 71 to rotate. After the crown gear 71 rotates, it drives the cylindrical gear 74 to rotate. After the cylindrical gear 74 rotates, it drives the second rotating shaft 75 to rotate, converting the longitudinal swing force into a force that causes the second rotating shaft 75 to rotate. After the second rotating shaft 75 rotates, it drives the rear shaft 5 to rotate, thereby achieving the purpose of power transmission.

[0033] like Figure 4 As shown in the right part, the rear triggering mechanism 5 includes a rear shaft 51, which is movably installed inside the housing 8. The rear shaft 51 is connected to the second rotating shaft 75. The outer wall of the rear shaft 51 is bolted with a second fixing bracket 52, which is used to install a second annular magnet 53. Both ends of the second fixing bracket 52 are bolted with a second annular magnet 53.

[0034] When the rear axle 51 rotates, it drives the second annular magnet 53 to rotate inside the housing 8. When the second annular magnet 53 rotates, it uses magnetism to drive the first annular magnet 42 to rotate, so as to achieve the transmission effect.

[0035] like Figure 4As shown in the left part, the front triggering mechanism 4 includes a front shaft 43 and two mounting plates 45. The mounting plates 45 are installed inside the meter body 1 and serve as the mounting carriers for the micro switches 44. The micro switches 44 are mounted on the mounting plates 45. When the two micro switches 44 are triggered, they connect the wiring of the wiring mechanism 2 through leads. The front shaft 43 is movably mounted inside the meter body 1. A first fixing bracket 41 is installed on the outer wall of the front shaft 43 near the rear shaft 51. The first fixing bracket 41 is used for the installation of the first annular magnetic ring 42. Both ends of the first fixing bracket 41 are secured by bolts. The front axle 43 is equipped with a first annular magnet 42, the position of which corresponds to the position of the second annular magnet 53, and the first annular magnet 42 is driven to rotate by the second annular magnet 53. A needle roller mounting wheel 47 is installed on the outer wall of the front axle 43, and the needle roller 46 is used to install the needle roller 46. The outer wall of the needle roller 46 is connected to the micro switch 44. A mounting plate 48 is installed at the end of the front axle 43 away from the first fixing frame 41. The mounting plate 48 is used to install the display mechanism 6. For the specific structure of the front trigger mechanism 4, please refer to [reference needed]. Figure 7 I learned that.

[0036] like Figure 4 As shown, the front axle 43 is used to mount the first annular magnet 42 and the needle roller mounting wheel 47, as well as other structures. After the first annular magnet 42 is rotated by the second annular magnet 53, it transmits magnetic force and rotates accordingly, driving the front axle 43 to rotate. The rotation of the front axle 43 drives the needle roller 46 on the needle roller mounting wheel 47 to rotate. After the needle roller 46 rotates, it contacts the micro switch 44. After the two micro switches 44 are triggered, the wiring of the wiring mechanism 2 is connected through the lead wire.

[0037] like Figure 5 As shown, in order to display the oil level information as an electrical signal, a wiring mechanism 2 is used. The wiring mechanism 2 includes a junction box 23, which is the packaging structure of the wiring mechanism 2. The junction box 23 is installed on the top of the meter body 1. A terminal mounting plate 21 is installed inside the junction box 23. The terminal mounting plate 21 is used to install the terminal 24. The terminal 24 is used to connect the lead wire and the wire to form a complete circuit. The terminal 24 is electrically connected to the micro switch 44 through the lead wire. A wire outlet gland 22 is installed on the side wall of the junction box 23. The wire outlet gland 22 leads out the lead wire of the terminal 24.

[0038] The specific wiring of the wiring mechanism 2 is as follows: two microswitches 44 are connected to terminal 24 via leads to form a series circuit. When the two microswitches 44 are turned on, the circuit is connected. For specific details, refer to [reference needed]. Figure 9 The suggested circuit diagram in the image shows that the rectangle on the lower right side represents any external alarm component.

[0039] To prevent the swaying range of the suspended ball 32 from being too large and thus to limit its movement, refer to... Figure 8 A limiting mechanism 9 is installed on the first rotating shaft 73 and the mounting bracket 72. The limiting mechanism 9 includes a limiting plate 91 and limiting screws 92. The limiting plate 91 is installed on the outer wall of the first rotating shaft 73. Three limiting holes 93 are opened on the side wall of the limiting plate 91. There are three limiting screws 92. The limiting screws 92 are installed on the mounting bracket 72 and correspond to the positions of the limiting holes 93. The limiting screws 92 pass through the limiting holes 93. When the first rotating shaft 73 rotates, it drives the limiting plate 91 and the limiting holes 93 to rotate. The rotation range of the limiting holes 93 is blocked by the limiting screws 92, thereby limiting the rotation range of the first rotating shaft 73.

[0040] To visually display the oil level, a display mechanism 6 is used. The display mechanism 6 is located inside the instrument body 1 near the front trigger mechanism 4. The display mechanism 6 includes a dial 61 and a viewing glass 62. The dial 61 is mounted on the mounting plate 48. When the mounting plate 48 rotates, it drives the dial 61 to rotate. After the dial 61 rotates, the indicator line on its surface rotates and points to the indication range inside the instrument body 1. The viewing glass 62 is mounted on the side end face of the instrument body 1, and the displayed information can be observed through the viewing glass 62.

[0041] The working principle of this utility model is explained below with a preferred embodiment: After the oil level in the oil conservator changes, the position of the suspension ball 32 changes with the oil level, causing the suspension rod 31 to swing, which in turn causes the first rotating shaft 73 and the crown gear 71 to rotate. After the crown gear 71 rotates, it drives the cylindrical gear 74 to rotate. After the cylindrical gear 74 rotates, it drives the second rotating shaft 75 to rotate, converting the longitudinal swing force into a force that causes the second rotating shaft 75 to rotate. After the second rotating shaft 75 rotates, it drives the rear shaft 5 to rotate, causing the second annular magnet 53 to rotate inside the outer casing 8. When the second annular magnet 53 rotates, it uses magnetism to drive the first annular magnet 42 to rotate. After the first annular magnet 42 is subjected to the magnetic force transmitted by the rotation of the second annular magnet 53, it rotates accordingly, driving the front shaft 43 to rotate. The rotation of the front shaft 43 drives the needle roller 46 on the needle roller mounting wheel 47 to rotate. After the needle roller 46 rotates, it contacts the micro switch 44. After the two micro switches 44 are triggered, they connect the wiring of the wiring mechanism 2 through the lead wire, energizing the external alarm components to trigger the alarm.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A protection instrument that takes the oil level change in a transformer oil pillow as an electrical signal, comprising a meter body (1) and a shell (6), the meter body (1) and the shell (8) are connected by bolts, characterized in that, The inside of the table body (1) is provided with a front trigger mechanism (4), the top of the table body (1) is provided with a wiring mechanism (2), the wiring mechanism (2) comprises a terminal mounting plate (21), the front trigger mechanism (4) comprises a front shaft (43), the outer wall of the front shaft (43) is provided with a first annular magnet (42) and a micro switch (44), the inside of the shell (8) is provided with a rear trigger mechanism (5), the rear trigger mechanism (5) comprises a rear shaft (51) and a second annular magnet (53) mounted on the outer wall thereof, and the outside of the shell (6) is provided with a transmission mechanism (7), the transmission mechanism (7) comprises a first rotating shaft (73) and a second rotating shaft (75), the first rotating shaft (73) and the second rotating shaft (75) are connected through gear transmission, the second rotating shaft (75) is connected with the rear shaft (51) through bolts, the first rotating shaft (73) is provided with a suspension mechanism (3) mounted through bolts, the suspension mechanism (3) comprises a suspension ball (32) and a suspension rod (31), the suspension ball (32) transmits the buoyancy of the oil surface to the first rotating shaft (73) through the suspension rod (31) to drive it to rotate, the first rotating shaft (73) drives the second rotating shaft (75) and the rear shaft (51) to rotate, the rear shaft (51) drives the front shaft (43) to trigger the micro switch (44) through magnetic force, and the micro switch (44) transmits an electric signal to the terminal mounting plate (21).

2. A protection instrument using the oil level change in the transformer oil pillow as an electrical signal according to claim 1, characterized in that, The suspension assembly (3) comprises a suspension rod (31), one end of the suspension rod (31) is provided with a suspension ball (32), and the other end of the suspension rod (31) is connected with the first connecting shaft (73) through a connecting bolt (33).

3. A protection instrument using the oil level change in the transformer oil pillow as an electrical signal according to claim 2, characterized in that, The transmission mechanism (7) comprises a mounting frame (72) and a second rotating shaft (75), the mounting frame (72) is mounted on the shell (8), the first rotating shaft (73) is mounted on the mounting frame (72), the outer wall of the first rotating shaft (73) is provided with a crown gear (71), and the second rotating shaft (75) is movably mounted on the shell (8), the outer wall of the second rotating shaft (75) is provided with a cylindrical gear (74), and the cylindrical gear (74) is meshed with the crown gear (71).

4. A protection instrument using the oil level change in the transformer oil pillow as an electrical signal according to claim 3, characterized in that, The rear trigger mechanism (5) comprises a rear shaft (51), the rear shaft (51) is movably mounted in the shell (8), the rear shaft (51) is connected with the second rotating shaft (75), the outer wall of the rear shaft (51) is provided with a second fixing frame (52) mounted through bolts, and the two ends of the second fixing frame (52) are provided with second annular magnets (53) mounted through bolts.

5. A protection instrument using the oil level change in the transformer oil pillow as an electrical signal according to claim 4, characterized in that, The front trigger mechanism (4) comprises a front shaft (43) and two mounting plates (45), the mounting plates (45) are mounted in the inside of the watch body (1), the two mounting plates (45) are both mounted with micro switches (44), the front shaft (43) is movably mounted in the inside of the watch body (1), the outer wall of the front shaft (43) near one end of the rear shaft (51) is mounted with a first fixed frame (41), the two ends of the first fixed frame (41) are both mounted with first annular magnets (42) through bolts, the positions of the first annular magnets (42) correspond to the positions of the second annular magnets (53), the outer wall of the front shaft (43) is mounted with a needle mounting wheel (47), the needle mounting wheel (47) is mounted with needles (46), the outer wall of the needle (46) is connected with the micro switch (44), one end of the front shaft (43) away from the first fixed frame (41) is mounted with a mounting seat plate (48).

6. A protection instrument using the oil level change in a transformer oil pillow as an electrical signal according to claim 5, characterized in that, The wiring mechanism (2) comprises a wiring box (23), the wiring box (23) is mounted on the top of the watch body (1), the inside of the wiring box (23) is mounted with a terminal mounting plate (21), the terminal mounting plate (21) is mounted with wiring terminals (24), the wiring terminals (24) are electrically connected with the micro switches (44) through lead wires, the side wall of the wiring box (23) is mounted with outlet glands (22).

7. A protection instrument using the oil level change in the transformer oil pillow as an electrical signal according to claim 3, characterized in that, The first rotating shaft (73) and the mounting frame (72) are mounted with a limiting mechanism (9), the limiting mechanism (9) comprises a limiting disc (91) and limiting screws (92), the limiting disc (91) is mounted on the outer wall of the first rotating shaft (73), three limiting holes (93) are formed in the side wall of the limiting disc (91), the limiting screws (92) are three, the limiting screws (92) are mounted on the mounting frame (72) and correspond to the positions of the limiting holes (93), the limiting screws (92) penetrate the limiting holes (93).

8. A protection instrument using oil level change in a transformer oil pillow as an electrical signal according to claim 5, characterized in that, The inside of the watch body (1) near the front trigger mechanism (4) is provided with a display mechanism (6), the display mechanism (6) comprises a watch dial (61) and a visible glass (62), the watch dial (61) is mounted on the mounting seat plate (48), and the visible glass (62) is mounted on the side end face of the watch body (1).

Images