A transformer-type respirator with oil quality detection function

Abstract

The invention discloses a transformer type respirator with an oil quality detection function, and relates to the technical field of transformer respirators. The respirator comprises a top cover, a dehumidification unit, a connection unit, an oil sealing unit, a detection unit, and a control unit. When the respirator inhales, air enters the oil sealing unit from the connection unit, and the oil sealing unit filters the inflowing air. The filtered air then passes through the connection unit and enters the dehumidification unit to absorb moisture in the filtered air, so as to prevent the transformer from being damp. The dried air then passes through the top cover and enters the transformer oil pillow. When the respirator exhales, the gas in the oil pillow passes through the top cover, the dehumidification unit, the connection unit, the oil sealing unit, and the connection unit to exclude the respirator. The detection unit regularly extracts transformer oil from the oil sealing unit for oil quality detection, detects the impurity content in the transformer oil, and prevents the respirator from being blocked due to excessive impurities. The control unit is responsible for receiving the signal sent by the detection unit and performing analysis and processing.

Description

Technical Field

[0001] The invention relates to the technical field of transformer respirators, in particular to a transformer respirator with an oil quality detection function. Background Art

[0002] A transformer respirator is a device used to protect transformers, also known as a desiccant. It can adjust the pressure difference of the gas inside the transformer while keeping the inside of the oil tank dry. Traditional transformer respirators are usually filled with adsorbents and transformer oil. When absorbing air, the external air first passes through the transformer oil to filter out impurities in the air. The filtered air then passes through the adsorbent, which absorbs moisture in the air to prevent the transformer from getting damp, reducing or destroying the insulation strength of the transformer oil in the transformer. Since the respirator is generally exposed to the outdoors and has a harsh operating environment, it is necessary to replace the silica gel in the respirator from time to time to prevent the silica gel from deliquescing and discoloring, affecting the adsorption effect. At the same time, the quality of the transformer oil will affect the filtering effect of impurities in the air. For this reason, it is necessary to regularly detect the quality of the transformer oil in the respirator to ensure the filtering effect. Summary of the invention

[0003] The object of the present invention is to provide a transformer type respirator with oil quality detection function to solve the problems raised in the prior art.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] The respirator includes a top cover, a dehumidification unit, a connecting unit, an oil sealing unit, a detection unit, and a control unit. One end of the dehumidification unit is inserted into the top cover, and the other end of the dehumidification unit is inserted into the connecting unit. The connecting unit and the top cover are snapped together. The bottom ends of the oil sealing unit and the connecting unit are threadedly connected. The input end of the detection unit passes through the connecting unit and is inserted into the oil sealing unit. The output end of the detection unit passes through the connecting unit and is inserted into the oil sealing unit. The control unit is arranged on the outer surface of the detection unit, and the control unit and the detection unit are electrically connected.

[0006] When the respirator inhales, the air enters the oil seal unit from the connecting unit. The oil seal unit filters the impurities in the inflowing air. The air filtered by the oil seal unit enters the dehumidification unit through the connecting unit. The dehumidification unit is responsible for drying the filtered air and absorbing moisture in the air to prevent the transformer from getting damp. The dried air finally passes through the top cover and enters the transformer oil pillow. When the respirator exhales, the gas in the oil pillow passes through the top cover, dehumidification unit, connecting unit, oil seal unit, and connecting unit in turn to be discharged from the respirator. The detection unit regularly extracts transformer oil from the oil seal unit for oil quality detection and detects the impurity content in the transformer oil to prevent excessive impurities from clogging the respirator and affecting the normal operation of the transformer. The control unit is responsible for receiving the signal sent by the detection unit for analysis and processing.

[0007] Furthermore, the top cover includes a flange, a sealing cover and a feed plug, the flange is fixedly connected to the top of the sealing cover, the sealing cover is covered on the dehumidification unit, a feed pipe is provided at the upper end of the sealing cover, an internal thread is provided at the inlet of the feed pipe, the feed plug and the feed pipe are threadedly connected, a through hole is provided at the axis of the flange, a through hole is also provided at the axis of the sealing cover, the through holes on the flange and the sealing cover are interconnected, and have the same aperture, positioning holes are provided around the sealing cover, and the sealing cover is clamped with the connecting unit at the positioning holes.

[0008] The flange is provided to facilitate the connection between the respirator and the transformer. The feed pipe on the cover can facilitate the filling of the dehumidification unit. When there is no need to fill the dehumidification unit, the feed plug can block the feed pipe to prevent air from circulating in the feed pipe. The positioning hole is provided on the cover to facilitate the installation of the connection unit.

[0009] Furthermore, the dehumidification unit includes a transparent cover and filling silica gel, one end of the transparent cover is inserted into the sealing cover, and the other end of the transparent cover is inserted into the connecting unit, and the filling silica gel is located in a chamber formed by the transparent cover, the connecting unit and the sealing cover.

[0010] The transparent cover can visually observe the color change of the silicone filling inside the respirator, and replace it in time to ensure the normal operation of the respirator. The silicone filling is responsible for drying and dehumidifying the air after being filtered by the oil seal unit, absorbing moisture in the air and preventing the transformer from getting damp.

[0011] Furthermore, the connecting unit includes a fixing rod, a locking block, a connecting rod, a baffle, a discharge pipe, a discharge plug, a base, a base, an oil suction pipe and an oil discharge pipe, one end of the fixing rod is fixedly connected to the outer surface of the base, the other end of the fixing rod is threadedly connected to the locking block, the fixing rod passes through the positioning hole of the cover, the locking block is located at the upper end of the cover, the locking block can pass through the positioning hole of the cover, the long side of the locking block is longer than the short side of the positioning hole of the cover, a circular groove is provided at the central axis of the bottom end surface of the base, one end of the connecting rod is fixedly connected to the circular groove at the bottom end of the base, the other end of the connecting rod is threadedly connected to the oil seal unit, the central axis of the connecting rod coincides with the central axis of the base, a through hole is provided next to the connecting rod in the circular groove at the bottom end of the base, an annular groove coaxial with the central axis is also provided at the bottom end of the base, the annular groove at the bottom end of the base is provided with an internal thread, the inner diameter of the annular groove at the bottom end of the base is larger than the radius of the circular groove, and the bottom end of the base is also provided with The vent hole, the air inlet of the base vent hole is located outside the annular groove, and the air outlet of the base vent hole is located between the annular groove and the circular groove. The base is also provided with two oil grooves, one port of the two oil grooves on the base is located between the annular groove and the circular groove, and the other port of the two oil grooves on the base is located on the side surface of the base. One end of the oil suction pipe and an oil groove are fixedly connected at the port between the annular groove and the circular groove, and one end of the oil outlet pipe is fixedly connected to the port of the other oil groove between the annular groove and the circular groove. The base is fixedly connected to the base, the upper end of the base is connected to the dehumidification unit, and a chamber is left between the base and the base, the two baffles are arranged in the chamber, the two baffles are fixedly connected to the inner wall of the base, the discharge pipe passes through the side wall of the base into the chamber, the discharge pipe penetrates into one end of the chamber and is fixedly connected to the base, and the other end of the discharge pipe is threadedly connected to the discharge plug.

[0012] The base is used as the installation foundation, the base and the base are fixedly connected, the dehumidification unit is placed on the base, the cover is positioned on the dehumidification unit through the positioning hole and the fixing rod, the locking block is rotated so that the phase relationship between the locking block and the positioning hole does not allow the locking block to pass through the positioning hole, and the dehumidification unit is clamped between the connecting unit and the top cover, and then the oil seal unit is connected to the connecting rod and the annular groove at the bottom end of the base, the vent hole on the base allows external air to enter the oil seal unit, and the oil groove provides a transformer oil flow path between the detection unit and the oil seal unit.

[0013] Furthermore, the upper end surface of the base is an inclined surface, a discharge through hole is provided at the lower end of the inclined surface of the base, the discharge through hole at the lower end of the base is fixedly connected to the discharge pipe, and gas through holes are provided on both sides of the base.

[0014] Furthermore, the two baffles are arranged at an angle, and the upper ends of the two baffles are respectively located between the gas through holes on both sides of the base and the through holes in the circular groove of the base, and the lower ends of the two baffles are located between the through holes in the circular groove of the base and the inner wall of the base.

[0015] When the filling silicone needs to be replaced, just remove the discharge plug, and the filling silicone will flow along the inclined surface into the discharge through hole at the lower end of the inclined surface, and then flow out from the discharge pipe. When loading the filling silicone, just screw the discharge plug into the discharge pipe to block the discharge pipe, and pour the filling silicone into the feed pipe. The baffle is used to block the tiny filling silicone falling from the gas through hole to prevent the filling silicone from entering the through hole in the circular groove of the base and entering the oil seal unit, or causing the through hole to be blocked, so that the respirator cannot work normally. At the same time, the baffle and the chamber between the base and the base can also prevent the transformer oil from splashing from the through hole into the dehumidification unit.

[0016] Furthermore, the oil seal unit includes an oil seal plate, an inner oil cup and an outer oil cup, both ends of the inner oil cup are not sealed, the oil seal plate and the connecting rod are threadedly connected, the oil seal plate clamps the inner oil cup in the circular groove at the bottom end of the base, the outer diameter of the inner oil cup is equal to the diameter of the circular groove at the bottom end of the base, a threaded section is provided on the side surface of the open end of the outer oil cup, the open end of the outer oil cup is threadedly connected to the annular groove at the bottom end of the base, the outer oil cup covers the oil seal plate and the inner oil cup, the outer oil cup is filled with transformer oil, and the oil level of the transformer oil in the outer oil cup is higher than the upper end surface of the oil seal plate.

[0017] The oil level of the transformer oil in the outer oil cup is higher than the upper end surface of the oil seal, which can ensure that the external air enters the inner oil cup after being filtered by the transformer oil, and the filtered air then enters the dehumidification unit through the connecting unit for dehumidification.

[0018] Furthermore, the inlet end of the oil suction pipe is located in the middle of the transformer oil, and the outlet end of the oil outlet pipe is located above the oil level.

[0019] Extracting transformer oil from the middle of the transformer oil can more accurately measure the quality of the transformer oil. The outlet end of the oil outlet pipe is located above the oil level to prevent the transformer oil from flowing back.

[0020] Furthermore, the detection unit includes a housing, a CCD camera, a zoom lens, a sample pool, a lighting element, a flow meter, an oil inlet pipe, a connecting pipe, a one-way valve and an electronic valve, one end of the oil inlet pipe is inserted into the housing and fixedly connected to the upper end of the sample pool, the other end of the oil inlet pipe is connected to the port of the oil groove connected to the oil suction pipe on the outside of the base, one end of the connecting pipe is inserted into the housing and fixedly connected to the lower end of the sample pool, the other end of the connecting pipe is connected to the port of the oil groove connected to the oil outlet pipe on the outside of the base, the CCD camera, the zoom lens, the sample pool and the lighting element are all located inside the housing, and the CCD camera and the lighting element The components are located on both sides of the sample pool, the CCD camera and the illumination element are both facing the sample pool, the zoom lens is located between the CCD camera and the sample pool, the CCD camera, the zoom lens and the illumination element are all fixedly connected to the inner wall of the shell, the flow meter is arranged at one end of the oil inlet pipe close to the shell, the one-way valve is arranged at one end of the oil inlet pipe close to the base, the electronic valve is arranged at one end of the connecting pipe close to the shell, the CCD camera, the zoom lens, the illumination element, the flow meter, the one-way valve, the electronic valve are all electrically connected to the control unit, the outer surface of the shell is fixedly connected to the control unit, and the sample pool is made of transparent material.

[0021] When the detection unit is working, the one-way valve opens, and the transformer oil is pumped from the outer oil cup into the sample pool. The flow meter monitors the transformer oil flow from the oil inlet pipe to the sample pool. When the transformer oil in the sample pool reaches a certain amount, the control unit controls the one-way valve to close, and the illumination element shines on the sample pool. Due to the different light transmittances of the transformer oil and impurities, the images displayed by the CCD camera have different colors, so as to judge the amount of impurities. The zoom lens is responsible for providing different magnifications. The images taken by the CCD camera are transmitted to the control unit, which analyzes and processes them to judge whether the transformer oil needs to be replaced. If it does not need to be replaced, the control unit controls the electronic valve to open, and the transformer oil in the sample pool flows into the outer oil cup again through the connecting pipe for use.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. When assembling the respirator, locate the connection unit through the positioning hole on the cover, and then rotate the locking block to clamp the transparent cover between the cover and the base, making the disassembly and assembly of the respirator body more convenient and quick.

[0024] 2. It is more convenient to replace the filling silicone. You only need to remove the discharge plug, remove the old filling silicone in the transparent cover from the discharge pipe, install the discharge plug, remove the feed plug, pour new filling silicone from the feed plug, and finally install the feed plug.

[0025] 3. The chamber between the base and the pedestal can effectively prevent the transformer oil in the inner oil cup from entering the transparent cover through the through hole and contaminating the filling silica gel. At the same time, the baffle in the chamber can also separate the fine filling silica gel that falls into the chamber from the transparent cover from the through hole of the base, preventing the through hole from being blocked or the fine filling silica gel from entering the inner oil cup.

[0026] 4. The detection unit can detect the oil quality of the transformer oil in the outer oil cup. When the detection unit is working, the one-way valve opens, and the transformer oil is pumped from the outer oil cup to the sample pool. The flow meter monitors the transformer oil flow from the oil suction pipe to the sample pool. When the transformer oil in the sample pool reaches a certain amount, the control unit controls the one-way valve to close, and the illumination element shines on the sample pool. Due to the different light transmittance of the transformer oil and impurities, the image displayed by the CCD camera has different colors, so as to judge the amount of impurities. The zoom lens is responsible for providing different magnifications. The image taken by the CCD camera is transmitted to the control unit, which analyzes and processes it to judge whether the transformer oil needs to be replaced. If it does not need to be replaced, the control unit controls the electronic valve to open, and the transformer oil in the sample pool flows into the outer oil cup again through the connecting pipe for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall appearance structure of a transformer-type respirator with an oil quality detection function according to the present invention;

[0028] Figure 2 It is a schematic diagram of the internal structure of a transformer-type respirator with oil quality detection function of the present invention;

[0029] Figure 3 It is a schematic diagram of the structure of a detection unit of a transformer-type respirator with an oil quality detection function according to the present invention;

[0030] Figure 4 It is a schematic diagram of the external structure of the connection unit of a transformer-type respirator with an oil quality detection function according to the present invention;

[0031] Figure 5 It is a schematic diagram of the internal structure of the connection unit of a transformer-type respirator with an oil quality detection function according to the present invention;

[0032] Figure 6 The present invention is a schematic diagram of the top cover structure of a transformer-type respirator with an oil quality detection function.

[0033] In the figure: 1. top cover; 2. dehumidification unit; 3. connecting unit; 4. oil seal unit; 5. detection unit; 6. control unit; 11. flange; 12. sealing cover; 13. feed plug; 14. feed pipe; 21. transparent cover; 22. filling silicone; 31. fixing rod; 32. locking block; 33. connecting rod; 34. baffle; 35. discharge pipe; 36. discharge plug; 37. base; 38. base; 39 oil suction pipe; 310. oil outlet pipe; 41. oil seal; 42. inner oil cup; 43. outer oil cup; 51. outer shell; 52. CCD camera; 53. zoom lens; 54. sample cell; 55. illumination element; 56. flow meter; 57. oil inlet pipe; 58. connecting pipe; 59. one-way valve; 510. electronic valve. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Example: Figure 1-Figure 6 As shown, the present invention provides a technical solution.

[0036] like Figure 1 As shown, the respirator includes a top cover 1, a dehumidification unit 2, a connection unit 3, an oil seal unit 4, a detection unit 5, and a control unit 6. One end of the dehumidification unit 2 is snapped into the top cover 1, and the other end of the dehumidification unit 2 is snapped into the connection unit 3. The connection unit 3 and the top cover 1 are snapped together. The oil seal unit 4 and the bottom ends of the connection unit 3 are threadedly connected. The input end of the detection unit 5 passes through the connection unit 3 and is inserted into the oil seal unit 4. The output end of the detection unit 5 passes through the connection unit 3 and is inserted into the oil seal unit 4. The control unit 6 is arranged on the outer surface of the detection unit 5, and the control unit 6 and the detection unit 5 are electrically connected.

[0037] When the respirator inhales, the air enters the oil seal unit 4 from the connecting unit 3, and the oil seal unit 4 filters the impurities of the inflowing air. The air filtered by the oil seal unit 4 enters the dehumidification unit 2 through the connecting unit 3. The dehumidification unit 2 is responsible for drying the filtered air and absorbing the moisture in the air to prevent the transformer from getting damp. The dried air finally passes through the top cover 1 and enters the transformer oil pillow. When the respirator exhales, the gas in the oil pillow passes through the top cover 1, the dehumidification unit 2, the connecting unit 3, the oil seal unit 4, and the connecting unit 3 in turn to be discharged from the respirator. The detection unit 5 regularly extracts transformer oil from the oil seal unit 4 for oil quality detection, detects the impurity content in the transformer oil, and prevents excessive impurities from causing blockage of the respirator and affecting the normal operation of the transformer. The control unit 6 is responsible for receiving the signal sent by the detection unit 5 and analyzing and processing it.

[0038] like Figure 6 As shown, the top cover 1 includes a flange 11, a cover 12 and a feed plug 13. The flange 11 and the top of the cover 12 are fixedly connected. The cover 12 covers the dehumidification unit 2. A feed pipe 14 is provided at the upper end of the cover 12. The inlet of the feed pipe 14 is provided with an internal thread. The feed plug 13 and the feed pipe 14 are threadedly connected. A through hole is provided at the axis of the flange 11. A through hole is also provided at the axis of the cover 12. The through holes on the flange 11 and the cover 12 are interconnected and have the same aperture. Positioning holes are provided around the cover 12, and the cover 12 is snap-connected with the connecting unit 3 at the positioning holes.

[0039] The flange 11 is provided to facilitate the connection between the respirator and the transformer. The feed pipe 14 on the cover 12 can facilitate the filling of the dehumidification unit 2. The feed plug 13 can block the feed pipe 14 when there is no need to fill the dehumidification unit 2 to prevent air from flowing in the feed pipe 14. The positioning hole is provided on the cover 12 to make it more convenient to install the connection unit 3.

[0040] like Figure 2 As shown, the dehumidification unit 2 includes a transparent cover 21 and a filling silica gel 22. One end of the transparent cover 21 is inserted into the sealing cover 12, and the other end of the transparent cover 21 is inserted into the connecting unit 3. The filling silica gel 22 is located in a chamber formed by the transparent cover 21, the connecting unit 3 and the sealing cover 12.

[0041] The transparent cover 21 can visually observe the color change of the silica gel 22 filled inside the respirator, and replace it in time to ensure the normal operation of the respirator. The silica gel 22 is responsible for drying and dehumidifying the air filtered by the oil seal unit 4, absorbing moisture in the air, and preventing the transformer from getting damp.

[0042] like Figure 4 and Figure 2As shown, the connecting unit 3 includes a fixing rod 31, a locking block 32, a connecting rod 33, a baffle 34, a discharge pipe 35, a discharge plug 36, a base 37, a base 38, an oil suction pipe 39 and an oil discharge pipe 310. One end of the fixing rod 31 is fixedly connected to the outer surface of the base 37, and the other end of the fixing rod 31 is threadedly connected to the locking block 32. The fixing rod 31 passes through the positioning hole of the cover 12, and the locking block 32 is located at the upper end of the cover 12. The locking block 32 can pass through the positioning hole of the cover 12. The long side of the locking block 32 is longer than the short side of the positioning hole of the cover 12. A circular groove is provided at the central axis of the bottom end surface of the base 37, one end of the connecting rod 33 is fixedly connected to the circular groove at the bottom end of the base 37, and the other end of the connecting rod 33 is threadedly connected to the oil seal unit 4, the central axis of the connecting rod 33 coincides with the central axis of the base 37, a through hole is provided beside the connecting rod 33 in the circular groove at the bottom end of the base 37, and the bottom end of the base 37 is also provided with an annular groove with the same central axis, and the annular groove at the bottom end of the base 37 is provided with an internal thread, and the inner diameter of the annular groove at the bottom end of the base 37 is larger than the radius of the circular groove, so The bottom end of the base 37 is also provided with an air vent, the air inlet of the air vent of the base 37 is located outside the annular groove, the air outlet of the air vent of the base 37 is located between the annular groove and the circular groove, and two oil grooves are also provided on the base 37, one port of the two oil grooves on the base 37 is located between the annular groove and the circular groove, and the other port of the two oil grooves on the base 37 is located on the side surface of the base 37, one end of the oil suction pipe 39 is fixedly connected to the port of the oil groove between the annular groove and the circular groove, and the oil outlet One end of the tube 310 is fixedly connected to the port of another oil-passing groove between the annular groove and the circular groove, the base 38 is fixedly connected to the base 37, the upper end of the base 38 is connected to the dehumidification unit 2, a chamber is left between the base 38 and the base 37, two baffles 34 are arranged in the chamber, the two baffles 34 are fixedly connected to the inner wall of the base 37, the discharge pipe 35 passes through the side wall of the base 37 into the chamber, one end of the discharge pipe 35 penetrates into the chamber and is fixedly connected to the base 38, and the other end of the discharge pipe 35 is threadedly connected to the discharge plug 36.

[0043] The base 37 serves as an installation foundation, the base 38 and the base 37 are fixedly connected, the dehumidification unit 2 is placed on the base 38, the cover 12 is positioned on the dehumidification unit 2 through the positioning hole and the fixing rod 31, the locking block 32 is rotated so that the phase relationship between the locking block 32 and the positioning hole does not allow the locking block 32 to pass through the positioning hole, and the dehumidification unit 2 is clamped between the connecting unit 3 and the top cover 1, and then the oil seal unit 4 is connected to the connecting rod 33 and the annular groove at the bottom end of the base 37, the vent hole on the base 37 allows external air to enter the oil seal unit 4, and the oil groove provides a transformer oil flow path between the detection unit 5 and the oil seal unit 4.

[0044] like Figure 2 and Figure 5 As shown, the upper end surface of the base 38 is an inclined surface, and a discharge hole is provided at the lower end of the inclined surface of the base 38. The discharge hole at the lower end of the base 38 is fixedly connected to the discharge pipe 35, and gas holes are provided on both sides of the base 38.

[0045] like Figure 2 and Figure 5 As shown, the two baffles 34 are arranged at an angle, and the upper ends of the two baffles 34 are respectively located between the gas through holes on both sides of the base 38 and the through holes in the circular groove of the base 37, and the lower ends of the two baffles 34 are located between the through holes in the circular groove of the base 37 and the inner wall of the base 37.

[0046] When the filling silica gel 22 needs to be replaced, it is only necessary to remove the discharge plug 36, and the filling silica gel 22 will flow along the inclined surface into the discharge through hole at the lower end of the inclined surface, and then flow out from the discharge pipe 35. When loading the filling silica gel 22, it is only necessary to screw the discharge plug 36 into the discharge pipe 35 to block the discharge pipe 35, and pour the filling silica gel 22 into the feed pipe 14. The baffle 34 is used to block the fine filling silica gel 22 falling from the gas through hole, and prevent the filling silica gel 22 from entering the through hole in the circular groove of the base 37 and entering the oil seal unit 4, or causing the through hole to be blocked, so that the respirator cannot work normally. At the same time, the baffle 34 and the chamber between the base 37 and the base 38 can also prevent the transformer oil from splashing from the through hole into the dehumidification unit 2.

[0047] like Figure 2 As shown, the oil seal unit 4 includes an oil seal plate 41, an inner oil cup 42 and an outer oil cup 43. Both ends of the inner oil cup 42 are not sealed. The oil seal plate 41 is threadedly connected to the connecting rod 33. The oil seal plate 41 clamps the inner oil cup 42 in the circular groove at the bottom end of the base 37. The outer diameter of the inner oil cup 42 is equal to the diameter of the circular groove at the bottom end of the base 37. A threaded section is provided on the side surface of the open end of the outer oil cup 43. The open end of the outer oil cup 43 is threadedly connected to the annular groove at the bottom end of the base 37. The outer oil cup 43 covers the oil seal plate 41 and the inner oil cup 42. The outer oil cup 43 is filled with transformer oil. The oil level of the transformer oil in the outer oil cup 43 is higher than the upper end surface of the oil seal plate 41.

[0048] The oil level of the transformer oil in the outer oil cup 43 is higher than the upper end surface of the oil seal 41, which can ensure that the external air enters the inner oil cup 42 after being filtered by the transformer oil, and the filtered air then enters the dehumidification unit 2 through the connecting unit 3 for dehumidification.

[0049] like Figure 2 As shown, the inlet end of the oil suction pipe 39 is located in the middle of the transformer oil, and the outlet end of the oil outlet pipe 310 is located above the oil level.

[0050] Extracting transformer oil from the middle of the transformer oil can more accurately measure the quality of the transformer oil. The outlet end of the oil outlet pipe 310 is located above the oil level to prevent the transformer oil from flowing back.

[0051] like Figure 3 As shown, the detection unit 5 includes a housing 51, a CCD camera 52, a zoom lens 53, a sample pool 54, a lighting element 55, a flow meter 56, an oil inlet pipe 57, a connecting pipe 58, a one-way valve 59 and an electronic valve 510. One end of the oil inlet pipe 57 is inserted into the housing 51 and fixedly connected to the upper end of the sample pool 54, and the other end of the oil inlet pipe 57 is connected to the port of the oil groove connected to the oil suction pipe 39 on the outside of the base 37. One end of the connecting pipe 58 is inserted into the housing 51 and fixedly connected to the lower end of the sample pool 54, and the other end of the connecting pipe 58 is connected to the port of the oil groove connected to the oil outlet pipe 310 on the outside of the base 37. The CCD camera 52, the zoom lens 53, the sample pool 54 and the lighting element 55 are all located inside the housing 51. The CCD camera 52 and the lighting element 55 Located on both sides of the sample pool 54, the CCD camera 52 and the illumination element 55 are both facing the sample pool 54, the zoom lens 53 is located between the CCD camera 52 and the sample pool 54, the CCD camera 52, the zoom lens 53 and the illumination element 55 are all fixedly connected to the inner wall of the shell 51, the flow meter 56 is arranged at one end of the oil inlet pipe 57 close to the shell 51, the one-way valve 59 is arranged at one end of the oil inlet pipe 57 close to the base 37, the electronic valve 510 is arranged at one end of the connecting pipe 58 close to the shell 51, the CCD camera 52, the zoom lens 53, the illumination element 55, the flow meter 56, the one-way valve 59, the electronic valve 510 are all electrically connected to the control unit 6, the outer surface of the shell 51 is fixedly connected to the control unit 6, and the sample pool 54 is made of transparent material.

[0052] When the detection unit 5 is working, the one-way valve 59 is opened, and the transformer oil is pumped from the outer oil cup 43 to the sample pool 54. The flowmeter 56 monitors the transformer oil flow from the oil inlet pipe 57 to the sample pool 54. When the transformer oil in the sample pool 54 reaches a certain amount, the control unit 6 controls the one-way valve 59 to close, and the lighting element 55 shines on the sample pool 54. Due to the different light transmittances of the transformer oil and impurities, the image displayed by the CCD camera 52 has different colors, so as to judge the amount of impurities. The zoom lens 53 is responsible for providing different magnifications. The image taken by the CCD camera 52 is transmitted to the control unit 6, which analyzes and processes it to judge whether the transformer oil needs to be replaced. If it does not need to be replaced, the control unit 6 controls the electronic valve 510 to open, and the transformer oil in the sample pool 54 flows into the outer oil cup 43 again through the connecting pipe 58 for use.

[0053] Working principle of the present invention:

[0054] When the respirator inhales, external air enters the outer oil cup 43 through the vent hole at the bottom of the base 37. The air entering the outer oil cup 43 passes through the transformer oil in the outer oil cup 43. The transformer oil filters impurities in the air. The filtered air passes through the oil seal 41 and sequentially passes through the inner oil cup 42, the base 37 and the base 38 to enter the transparent cover 21. The filled silica gel 22 in the transparent cover 21 absorbs moisture in the air to prevent the transformer from getting damp. The dried air finally passes through the top cover 1 and enters the transformer oil pillow. When the respirator exhales, the gas in the transformer oil pillow passes through the flange 11, the cover 12, the filled silica gel 22, the base 38, the base 37, the inner oil cup 42, the outer oil cup 43 and the base 37 to be discharged from the inside of the respirator. When the detection unit 5 is working, the one-way valve 59 is opened, and the transformer oil is drawn from the outer oil cup 43 to the sample pool 54. The flow meter 56 monitors The flow rate of transformer oil flowing from the oil inlet pipe 57 to the sample pool 54 is controlled. When the transformer oil in the sample pool 54 reaches a certain amount, the control unit 6 controls the one-way valve 59 to close, and the illumination element 55 illuminates the sample pool 54. Due to the different light transmittances of the transformer oil and impurities, the images captured by the CCD camera 52 have different shades of color, thereby judging the amount of impurities. The zoom lens 53 is responsible for providing different magnifications. The images captured by the CCD camera 52 are transmitted to the control unit 6, which performs analysis and processing to judge whether the transformer oil needs to be replaced. If it does not need to be replaced, the control unit 6 controls the electronic valve 510 to open, and the transformer oil in the sample pool 54 flows into the outer oil cup 43 again through the connecting pipe 58 for use. The detection unit 5 can detect the oil quality of the transformer oil in the outer oil cup 43 in time to ensure the cleanliness of the air entering the transformer oil pillow.

[0055] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and range of equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A transformer-type respirator with oil quality detection function, characterized in that: The respirator comprises a top cover (1), a dehumidification unit (2), a connection unit (3), an oil seal unit (4), a detection unit (5), and a control unit (6); one end of the dehumidification unit (2) is inserted into the top cover (1), the other end of the dehumidification unit (2) is inserted into the connection unit (3), the connection unit (3) and the top cover (1) are snap-connected, the bottom ends of the oil seal unit (4) and the connection unit (3) are threadedly connected, the input end of the detection unit (5) passes through the connection unit (3) and is inserted into the oil seal unit (4), the output end of the detection unit (5) passes through the connection unit (3) and is inserted into the oil seal unit (4), the control unit (6) is arranged on the outer surface of the detection unit (5), and the control unit (6) and the detection unit (5) are electrically connected; The top cover (1) comprises a flange (11), a sealing cover (12) and a feed plug (13); the flange (11) and the top of the sealing cover (12) are fixedly connected; the sealing cover (12) covers the dehumidification unit (2); a feed pipe (14) is arranged at the upper end of the sealing cover (12); an inlet of the feed pipe (14) is arranged with an internal thread; the feed plug (13) and the feed pipe (14) are threadedly connected; a through hole is arranged at the axis of the flange (11); a through hole is also arranged at the axis of the sealing cover (12); the through holes on the flange (11) and the sealing cover (12) are interconnected and have the same aperture; positioning holes are arranged around the sealing cover (12); the sealing cover (12) is snap-fitted to the connection unit (3) at the positioning holes; The connecting unit (3) comprises a fixing rod (31), a locking block (32), a connecting rod (33), a baffle (34), a discharge pipe (35), a discharge plug (36), a base (37), a seat (38), an oil suction pipe (39) and an oil discharge pipe (310), one end of the fixing rod (31) is fixedly connected to the outer surface of the base (37) on all sides, the other end of the fixing rod (31) is threadedly connected to the locking block (32), the fixing rod (31) passes through the positioning hole of the sealing cover (12), the locking block (32) is located at the upper end of the sealing cover (12), the locking block (32) can pass through the positioning hole of the sealing cover (12), and the long side of the locking block (32) is fixedly connected to the outer surface of the sealing cover (12). The base (37) is longer than the short side of the positioning hole of the sealing cover (12); a circular groove is provided at the central axis of the bottom end surface of the base (37); one end of the connecting rod (33) is fixedly connected to the circular groove at the bottom end of the base (37); the other end of the connecting rod (33) is threadedly connected to the oil seal unit (4); the central axis of the connecting rod (33) coincides with the central axis of the base (37); a through hole is provided beside the connecting rod (33) in the circular groove at the bottom end of the base (37); an annular groove with the same central axis is also provided at the bottom end of the base (37); the annular groove at the bottom end of the base (37) is provided with an internal thread; the inner diameter of the annular groove at the bottom end of the base (37) is The base (37) is larger than the radius of the circular groove, and a vent hole is also provided at the bottom end of the base (37). The air inlet of the vent hole of the base (37) is located outside the annular groove, and the air outlet of the vent hole of the base (37) is located between the annular groove and the circular groove. The base (37) is also provided with two oil grooves, one port of the two oil grooves on the base (37) is located between the annular groove and the circular groove, and the other ports of the two oil grooves on the base (37) are located on the side surface of the base (37). One end of the oil suction pipe (39) is fixedly connected to the port of the oil groove between the annular groove and the circular groove. The oil outlet pipe (39) is fixedly connected to the oil outlet pipe (39). 10) one end is fixedly connected to the port of the other oil-passing groove between the annular groove and the circular groove, the base (38) is fixedly connected to the base (37), the upper end of the base (38) is connected to the dehumidification unit (2), a chamber is left between the base (38) and the base (37), two baffles (34) are arranged in the chamber, the two baffles (34) are fixedly connected to the inner wall of the base (37), the discharge pipe (35) passes through the side wall of the base (37) and enters the chamber, one end of the discharge pipe (35) penetrates into the chamber and is fixedly connected to the base (38), and the other end of the discharge pipe (35) is threadedly connected to the discharge plug (36); The upper end surface of the base (38) is an inclined surface, and a discharge through hole is provided at the lower end of the inclined surface of the base (38). The discharge through hole at the lower end of the base (38) is fixedly connected to the discharge pipe (35), and gas through holes are provided on both sides of the base (38); The two baffles (34) are arranged at an angle, and the upper ends of the two baffles (34) are respectively located between the gas through holes on both sides of the base (38) and the through holes in the circular groove of the base (37), and the lower ends of the two baffles (34) are located between the through holes in the circular groove of the base (37) and the inner wall of the base (37); The oil seal unit (4) comprises an oil seal plate (41), an inner oil cup (42) and an outer oil cup (43). Both ends of the inner oil cup (42) are not sealed. The oil seal plate (41) and the connecting rod (33) are threadedly connected. The oil seal plate (41) clamps the inner oil cup (42) in a circular groove at the bottom end of the base (37). The outer diameter of the inner oil cup (42) is equal to the diameter of the circular groove at the bottom end of the base (37). A threaded section is provided on the side surface of the open end of the outer oil cup (43). The open end of the outer oil cup (43) is threadedly connected to the annular groove at the bottom end of the base (37). The outer oil cup (43) covers the oil seal plate (41) and the inner oil cup (42). Transformer oil is contained in the outer oil cup (43). The oil level of the transformer oil in the outer oil cup (43) is higher than the upper end surface of the oil seal plate (41). The inlet end of the oil suction pipe (39) is located in the middle of the transformer oil, and the outlet end of the oil outlet pipe (310) is located above the oil level; The detection unit (5) comprises a housing (51), a CCD camera (52), a zoom lens (53), a sample pool (54), an illumination element (55), a flow meter (56), an oil inlet pipe (57), a connecting pipe (58), a one-way valve (59) and an electronic valve (510). One end of the oil inlet pipe (57) is inserted into the housing (51) and fixedly connected to the upper end of the sample pool (54). The other end of the oil inlet pipe (57) is connected to an oil suction pipe (310) on the outside of the base (37). 9), one end of the connecting pipe (58) is inserted into the housing (51) and fixedly connected to the lower end of the sample pool (54), the other end of the connecting pipe (58) is connected to the port of the oil groove connected to the oil outlet pipe (310) on the outside of the base (37), the CCD camera (52), the zoom lens (53), the sample pool (54) and the illumination element (55) are all located inside the housing (51), and the CCD camera (52) and the illumination element (55) are The CCD camera (52) and the illumination element (55) are both facing the sample pool (54), the zoom lens (53) is located between the CCD camera (52) and the sample pool (54), the CCD camera (52), the zoom lens (53) and the illumination element (55) are all fixedly connected to the inner wall of the housing (51), the flow meter (56) is arranged at one end of the oil inlet pipe (57) close to the housing (51), and the one-way valve (59) is arranged The electronic valve (510) is disposed at one end of the oil inlet pipe (57) close to the base (37); the electronic valve (510) is disposed at one end of the connecting pipe (58) close to the housing (51); the CCD camera (52), the zoom lens (53), the illumination element (55), the flow meter (56), the one-way valve (59), and the electronic valve (510) are all electrically connected to the control unit (6); the outer surface of the housing (51) is fixedly connected to the control unit (6); and the sample pool (54) is made of a transparent material.

2. The transformer-type respirator with oil quality detection function according to claim 1 is characterized in that: The dehumidification unit (2) comprises a transparent cover (21) and a filling silica gel (22); one end of the transparent cover (21) is inserted into the sealing cover (12); the other end of the transparent cover (21) is inserted into the connecting unit (3); and the filling silica gel (22) is located in a chamber formed by the transparent cover (21), the connecting unit (3) and the sealing cover (12).

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