Oil level observation device for oil-immersed current transformer

Abstract

The invention discloses an oil level observation device for an oil-immersed current transformer, which comprises an oil tank and an oil level observation mechanism, and is characterized in that a mounting groove is formed in the middle of the left side of the oil tank; the oil level observation mechanism comprises an observation pipe, inserting blocks, a sealing plug, an oil scraping block, a sliding block and a limiting assembly, the inserting blocks which are evenly distributed are arranged at the rear end of the observation pipe and matched with an inserting groove in the middle of the left side wall of the installation groove, and the sealing plug is arranged in the middle of the bottom wall of the installation groove and connected with the bottom of the observation pipe in an inserted mode. A sliding groove is formed in the right end of the observation pipe, a sliding block is slidably connected into the sliding groove in the right end of the observation pipe, an oil scraping block is arranged at the left end of the sliding block and makes contact with the inner wall of the observation pipe, and the limiting assembly is used for installation limiting of the observation pipe. The problem that the scale cannot be seen clearly when oil is attached to the tube wall for a long time is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of oil level observation devices, and particularly to an oil level observation device for oil-immersed current transformers. Background Art

[0002] ‌The oil-immersed current transformer‌ is a device used in the power system, and its main function is to convert high voltage and large current into low voltage and small current suitable for measurement and protection. The oil-immersed current transformer usually consists of insulating paper and insulating oil; The traditional oil level observation device for oil-immersed current transformers is to connect an observation tube at the bottom of the fuel tank, and determine the remaining oil volume in the fuel tank by observing the scale on the tube wall; This type of oil level observation device for oil-immersed current transformers has the following disadvantages: After the oil volume in the observation tube changes, some oil will adhere to the tube wall. After long-term adhesion, it will cause the scale to be unclear, thus affecting the observation of the oil level. Moreover, the observation tube is not easy to disassemble, inconvenient to replace and clean. For this reason, we propose an oil level observation device for oil-immersed current transformers. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the existing defects, and provide an oil level observation device for oil-immersed current transformers, which scrapes off the oil adhering to the inner wall of the observation tube by the up and down movement of the oil scraping block, avoiding the problem that the scale cannot be seen clearly due to the long-term adhesion of oil on the observation tube wall, and can effectively solve the problems in the background art.

[0004] To achieve the above object, the present invention provides the following technical solution: An oil level observation device for an oil-immersed current transformer, including a fuel tank, an installation groove is opened in the middle of the left side of the fuel tank, and an oil level observation mechanism is further included; Oil level observation mechanism: It includes an observation tube, insertion blocks, a sealing plug, an oil scraping block, a slider and a limiting component. The rear end of the observation tube is provided with evenly distributed insertion blocks, and the insertion blocks are all installed in cooperation with the slots in the middle of the left side wall of the installation groove. The middle of the bottom wall of the installation groove is provided with a sealing plug, and the sealing plug is inserted into the bottom of the observation tube. A slider is slidably connected in the chute at the right end of the observation tube, and an oil scraping block is arranged at the left end of the slider. The oil scraping block is in contact with the inner wall of the observation tube. The limiting component is used for the installation and limitation of the observation tube. By the up and down movement of the oil scraping block, the oil adhering to the inner wall of the observation tube is scraped off, avoiding the problem that the scale cannot be seen clearly due to the long-term adhesion of oil on the observation tube wall, and the observation tube is easy to disassemble, convenient to replace and clean.

[0005] Further, a control switch is arranged on the left side of the fuel tank, and the input end of the control switch is electrically connected to an external power supply to control the motor.

[0006] Further, the oil level observation mechanism further includes a lead screw and a motor. The lead screw is rotatably connected between the middle upper end of the sealing plug and the top wall of the observation tube. The lead screw is threadedly connected to the threaded hole in the middle of the oil scraping block. The motor is arranged at the lower left end of the fuel tank. The output shaft of the motor passes through the lower left end of the fuel tank and the round hole in the middle of the sealing plug and is fixedly connected to the lower end of the lead screw. The input end of the motor is electrically connected to the output end of the control switch to drive the oil scraping block to move.

[0007] Further, the limiting component includes sliding grooves, limiting blocks and limiting grooves. Symmetrically distributed sliding grooves are formed in the middle of the right side wall of the installation groove. Limiting blocks are slidably connected in the sliding grooves. Symmetrically distributed limiting grooves are formed in the middle of the upper end of the observation tube. The limiting grooves are respectively installed in cooperation with the longitudinally adjacent limiting blocks to limit the installation of the observation tube.

[0008] Further, the limiting component further includes springs. The springs are respectively arranged between the inner walls of the sliding grooves and the right sides of the limiting blocks to provide a resilient force for the limiting blocks.

[0009] Further, the limiting component further includes buttons. The buttons are respectively arranged on the sides of the limiting blocks away from the center of the observation tube. The buttons extend to the outside of the sliding grooves to drive the limiting blocks to move.

[0010] Further, an oil inlet is formed in the lower right end of the observation tube. The oil inlet is communicated with the fuel tank to facilitate the inlet of oil into the observation tube.

[0011] Further, scale lines are arranged on the left side of the observation tube to facilitate the observation of the oil level.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: The oil level observation device for the oil-immersed current transformer of the present invention has the following advantages: 1. The motor drives the lead screw to rotate to drive the oil scraping block to move up and down to scrape the oil adhering to the inner wall of the observation tube. The oil adhering to the inner wall of the observation tube is scraped off by the up and down movement of the oil scraping block, avoiding the problem that the scale cannot be clearly seen due to the long-term adhesion of oil on the observation tube wall.

[0013] 2. Through the cooperation of the slot and the plug, the upper limit of the limiting component and the lower insertion of the sealing plug, the observation tube can be disassembled more conveniently. The observation tube is easy to disassemble, facilitating replacement and cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic sectional structural diagram of the present invention; Figure 3 is an enlarged schematic structural diagram of part A of the present invention; Figure 4 is a schematic sectional structural diagram of the present invention in a top view; Figure 5 It is a schematic structural diagram of the enlarged part B of the present invention; Figure 6 It is a schematic structural diagram of the limit component of the present invention.

[0015] In the figure: 1 fuel tank, 2 installation groove, 3 oil level observation mechanism, 31 observation tube, 32 insertion block, 33 sealing plug, 34 lead screw, 35 oil scraping block, 36 slider, 37 motor, 38 limit component, 381 sliding groove, 382 limit block, 383 button, 384 limit groove, 385 spring, 4 control switch, 5 oil inlet. Specific embodiments

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0017] Please refer to Figure 1-6 , this embodiment provides a technical solution: an oil level observation device for an oil-immersed current transformer, including a fuel tank 1, an installation groove 2 is opened in the middle of the left side of the fuel tank 1, and further includes an oil level observation mechanism 3. A control switch 4 is arranged on the left side of the fuel tank 1, and the input end of the control switch 4 is electrically connected to an external power supply; Oil level observation mechanism 3: It includes an observation tube 31, insertion blocks 32, a sealing plug 33, an oil scraping block 35, a slider 36, and a limiting component 38. The rear end of the observation tube 31 is provided with evenly distributed insertion blocks 32, and the insertion blocks 32 are all fitted and installed with the slots in the middle of the left side wall of the installation groove 2. An oil inlet 5 is opened at the lower right end of the observation tube 31, and the oil inlet 5 is communicated with the fuel tank 1. A scale line is provided on the left side of the observation tube 31. A sealing plug 33 is provided in the middle of the bottom wall of the installation groove 2, and the sealing plug 33 is inserted into the bottom of the observation tube 31. A slider 36 is slidably connected in the chute at the right end of the observation tube 31. An oil scraping block 35 is provided at the left end of the slider 36, and the oil scraping block 35 is in contact with the inner wall of the observation tube 31. The limiting component 38 is used for the installation and limitation of the observation tube 31. The oil level observation mechanism 3 further includes a lead screw 34 and a motor 37. The lead screw 34 is rotatably connected between the middle of the upper end of the sealing plug 33 and the top wall of the observation tube 31, and the lead screw 34 is threadedly connected with the threaded hole in the middle of the oil scraping block 35. The motor 37 is provided at the lower left end of the fuel tank 1. The output shaft of the motor 37 passes through the lower left end of the fuel tank 1 and the round hole in the middle of the sealing plug 33 and is fixedly connected to the lower end of the lead screw 34. The input end of the motor 37 is electrically connected to the output end of the control switch 4. The limiting component 38 includes sliding grooves 381, limiting blocks 382, and limiting grooves 384. Symmetrically distributed sliding grooves 381 are opened in the middle of the right side wall of the installation groove 2, and limiting blocks 382 are slidably connected in the sliding grooves 381. Symmetrically distributed limiting grooves 384 are opened in the middle of the upper end of the observation tube 31, and the limiting grooves 384 are all fitted and installed with the longitudinally adjacent limiting blocks 382. The limiting component 38 further includes springs 385, and the springs 385 are all provided between the inner wall of the sliding groove 381 and the right side of the limiting block 382. The limiting component 38 further includes buttons 383, and the buttons 383 are all provided on the side of the limiting block 382 away from the center of the observation tube 31, and the buttons 383 all extend to the outside of the sliding groove 381. If there is oil adhering to the inner wall of the observation tube 31, the motor 37 can be turned on through the control switch 4. The motor 37 drives the lead screw 34 to rotate, driving the oil scraping block 35 to slide downward along the chute to scrape off the oil on the inner wall of the observation tube 31. If it is necessary to clean and replace the observation tube 31, the buttons 383 can be simultaneously pressed downward by hand. The buttons 383 drive the limiting blocks 382 to slide into the interior of the sliding groove 381 and compress the springs 385 to make them contract. At this time, the limiting blocks 382 will disengage from the limiting grooves 384, so that the observation tube 31 is released from the limit, and then the observation tube 31 can be pulled out upward. After cleaning, the insertion blocks 32 need to be aligned with the slots and inserted. Since the length of the slot is longer than that of the insertion block 32, after insertion, the observation tube 31 is pressed downward. At this time, the limiting blocks 382 will be squeezed into the interior of the sliding groove 381 until the insertion blocks 32 are inserted into the bottom of the slots. At the same time, the sealing plug 33 is inserted into the bottom of the observation tube 31, and the limiting blocks 382 are aligned with the limiting grooves 384. Under the action of the springs 385, they pop out of the sliding groove 381 and are inserted into the limiting grooves 384, thus completing the installation of the observation tube 31.The oil adhering to the inner wall of the observation tube 31 is scraped off by the up and down movement of the oil scraping block 35, avoiding the problem that the scale cannot be clearly seen due to the long-term adhesion of oil to the wall of the observation tube 31. Moreover, the observation tube 31 is easy to disassemble, facilitating replacement and cleaning.

[0018] The working principle of the oil level observation device for an oil-immersed current transformer provided by the present invention is as follows: After the oil level inside the observation tube 31 changes, if there is oil adhering to the inner wall of the observation tube 31, the motor 37 can be turned on by controlling the switch 4. The motor 37 drives the screw rod 34 to rotate, driving the oil scraping block 35 to slide downward along the chute to scrape off the oil on the inner wall of the observation tube 31. If it is necessary to clean and replace the observation tube 31, the button 383 can be simultaneously pressed downward by hand. The button 383 drives the limit block 382 to slide into the sliding groove 381 and squeeze the spring 385 to make it contract. At this time, the limit block 382 will disengage from the limit groove 384, so that the observation tube 31 is released from the limit, and then the observation tube 31 can be pulled out upward. After cleaning, the insertion block 32 needs to be aligned with the insertion slot and inserted. Since the length of the insertion slot is longer than that of the insertion block 32, after insertion, the observation tube 31 is pressed downward. At this time, the limit block 382 will be squeezed into the sliding groove 381 until the insertion block 32 is inserted to the bottom of the insertion slot. At the same time, the sealing plug 33 is inserted into the bottom of the observation tube 31, and the limit block 382 is aligned with the limit groove 384. Under the action of the spring 385, it pops out of the sliding groove 381 and is inserted into the limit groove 384, thus completing the installation of the observation tube 31.

[0019] It should be noted that the motor 37 disclosed in the above embodiments can be selected as KS-4632, and the control switch group 4 is provided with a button corresponding to the motor 37 to control its switch.

[0020] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. An oil level observation device for an oil-immersed current transformer, comprising an oil tank (1), a mounting groove (2) being provided in the middle of the left side of the oil tank (1), characterized in that: Also includes an oil level observation mechanism (3); The oil level observation mechanism (3) comprises an observation tube (31), an insert block (32), a sealing plug (33), an oil scraper block (35), a slider (36) and a limit assembly (38). The rear end of the observation tube (31) is provided with evenly distributed insert blocks (32). The insert blocks (32) are all installed in cooperation with the slots in the middle of the left side wall of the installation groove (2). The middle of the bottom wall of the installation groove (2) is provided with a sealing plug (33). The sealing plug (33) is plugged into the bottom of the observation tube (31). The right end of the observation tube (31) is slidably connected with a slider (36). The left end of the slider (36) is provided with an oil scraper block (35). The oil scraper block (35) contacts the inner wall of the observation tube (31). The limit assembly (38) is used for limiting the installation of the observation tube (31).

2. The oil level observation device for an oil-immersed current transformer according to claim 1, characterized in that: A control switch (4) is provided on the left side of the oil tank (1), and an input end of the control switch (4) is electrically connected to an external power supply.

3. The oil level observation device for an oil-immersed current transformer according to claim 2, characterized in that: The oil level observation mechanism (3) further comprises a screw rod (34) and a motor (37). The screw rod (34) is rotatably connected between the middle portion of the upper end of the sealing plug (33) and the top wall of the observation tube (31). The screw rod (34) is threadedly connected to a threaded hole in the middle portion of the oil scraper (35). The motor (37) is arranged at the lower left end of the oil tank (1). The output shaft of the motor (37) passes through the lower left end of the oil tank (1) and the circular hole in the middle portion of the sealing plug (33) and is fixedly connected to the lower end of the screw rod (34). The input end of the motor (37) is electrically connected to the output end of the control switch (4).

4. The oil level observation device for an oil-immersed current transformer according to claim 1, characterized in that: The limiting assembly (38) comprises a sliding groove (381), a limiting block (382) and a limiting groove (384); a symmetrically distributed sliding groove (381) is provided in the middle of the right side wall of the installation groove (2); the limiting blocks (382) are slidably connected in the sliding grooves (381); a symmetrically distributed limiting groove (384) is provided in the middle of the upper end of the observation tube (31); and the limiting grooves (384) are installed in cooperation with the limiting blocks (382) adjacent in the longitudinal direction.

5. The oil level observation device for an oil-immersed current transformer according to claim 4, characterized in that: The limiting assembly (38) further comprises a spring (385), and the spring (385) is arranged between the inner wall of the sliding groove (381) and the right side of the limiting block (382).

6. The oil level observation device for an oil-immersed current transformer according to claim 4, characterized in that: The limiting assembly (38) further comprises a button (383), wherein the buttons (383) are arranged on a side of the limiting block (382) away from the center of the observation tube (31), and the buttons (383) extend to the outside of the sliding slot (381).

7. The oil level observation device for an oil-immersed current transformer according to claim 1, characterized in that: An oil inlet (5) is provided at the lower right end of the observation tube (31), and the oil inlet (5) is connected to the oil tank (1).

8. The oil level observation device for an oil-immersed current transformer according to claim 1, characterized in that: A scale line is provided on the left side of the observation tube (31).

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