Online monitoring device and system for dissolved gas in transformer oil

Abstract

The invention relates to the technical field of dissolved gas monitoring devices, in particular to an on-line monitoring device and system for dissolved gas in transformer oil, the on-line monitoring device for the dissolved gas in the transformer oil comprises an oil tank and a detection device body, the outer wall of one side of the oil tank is fixedly connected with an oil taking pipe; the outer wall of one end of the oil taking pipe is fixedly connected with the outer wall of one side of the detection device body, the outer wall of the oil taking pipe is fixedly connected with a sealing shell, and the interior of the sealing shell is slidably connected with a plugging shell; the oil sampling device has the beneficial effects that the cleaning brush is driven by the mounting shell to clean the inner wall of the oil sampling pipe, so that oil stains, impurities and gas remained in the sampling process of the oil sampling pipe are prevented from polluting a subsequent oil sample and influencing the accuracy of an analysis result if the residues are not cleaned in time, and the oil sampling pipe is correspondingly and regularly cleaned, so that the oil sampling efficiency is improved. The oil taking pipe can be kept clean, and faults and errors caused by pollution of the oil taking pipe are reduced.

Description

Technical Field

[0001] The invention relates to the field of dissolved gas monitoring devices, in particular to an online monitoring device and system for dissolved gas in transformer oil. Background Art

[0002] An online monitoring device for dissolved gas in transformer oil is a device specially designed to monitor the content of dissolved gas components in oil in oil-filled high-voltage electrical equipment such as transformers and reactors. The oil sampling pipe is one of the key components of the online monitoring device for dissolved gas in transformer oil. It is responsible for extracting oil samples from the transformer for subsequent gas analysis and monitoring. Therefore, the performance and status of the oil sampling pipe directly affect the accuracy and reliability of the monitoring results.

[0003] Transformer oil is a mineral oil obtained through distillation and refining of natural petroleum. It is a mixture of pure, stable, low-viscosity, good insulating and cooling liquid natural hydrocarbons obtained by acid-base refining of the lubricating oil fraction in petroleum. It is commonly known as square shed oil and is a light yellow transparent liquid.

[0004] The patent application publication number is CN208505735U, which discloses an oil-gas separation device for online monitoring of dissolved gas in transformer oil. The oil-gas separation device for online monitoring of dissolved gas in transformer oil cooperates with the arrangement of an air pressure box, a partition, a stepped hole, a piston plate, a connecting rod, a one-way valve and a telescopic tube. It only needs to pull up the piston plate to form a negative pressure environment inside the air pressure box. The invention is simple and practical, does not waste excess electricity, and solves the problem that the existing oil-gas separation method wastes a lot of electricity and does not meet the current environmental protection and energy-saving requirements.

[0005] In the prior art, during long-term operation, the oil pipe may be clogged or polluted due to the adhesion of oil products, accumulation of sediments, etc., thus affecting the accuracy and representativeness of sampling;

[0006] Therefore, we need an online monitoring device and system for dissolved gas in transformer oil to solve the problem of pipeline pollution caused by oil adhesion inside the oil pipe, so as to ensure the accuracy and reliability of sampling. Summary of the invention

[0007] The object of the present invention is to provide an on-line monitoring device and system for dissolved gas in transformer oil, so as to solve the problems raised in the above background technology.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: the online monitoring device for dissolved gas in transformer oil comprises: an oil tank and a detection device body, the outer wall of one side of the oil tank is fixedly connected with an oil extraction pipe, the outer wall of one end of the oil extraction pipe is fixedly connected with the outer wall of one side of the detection device body, the outer wall of the oil extraction pipe is fixedly connected with a sealing shell, the interior of the sealing shell is slidably connected with a blocking shell, the interior of the sealing shell is provided with a cleaning mechanism, and the interior of the sealing shell is provided with a flushing mechanism; the flushing mechanism comprises a connecting main pipe, the outer wall of the connecting main pipe is movably connected to the outer wall of the top of the sealing shell; the cleaning mechanism comprises a mounting shell, the outer wall of the mounting shell is movably connected to the interior of the blocking shell.

[0009] Preferably, the outer wall of the bottom of the connecting main pipe is fixedly connected to a diversion pipe, the outer wall of the bottom is fixedly connected to pipe one, the outer wall of the bottom of pipe one is fixedly connected to a telescopic tube, the outer wall of one end of the telescopic tube is fixedly connected to the inner wall of the blocking shell, and the outer wall of the other end of the telescopic tube is fixedly connected to the outer wall of one side of the mounting shell.

[0010] Preferably, the outer wall of one end of the shunt pipe is connected through the inner wall of the mounting shell, and the outer wall of the shunt pipe is located inside the mounting shell and is fixedly connected with pipeline 2.

[0011] Preferably, the outer wall of the top of the sealing shell is fixedly connected to a base, the inside of the base is rotatably connected to a threaded rod, the outer wall of the top of the sealing shell is provided with a threaded hole, and the inner wall of the threaded hole is threadedly connected to the outer wall of the threaded rod.

[0012] Preferably, a cleaning brush is fixedly connected to the middle position of the outer wall of the mounting shell, a circular hole is opened on the outer wall of the mounting shell, a mounting rod is rotatably connected inside the circular hole, a rotating brush is fixedly connected to the outer wall at one end of the mounting rod, and a sub-gear is fixedly connected to the outer wall at the other end of the mounting rod.

[0013] Preferably, a cavity is provided inside the mounting shell, inner walls on both sides of the cavity are rotatably connected to a rotating shaft, an outer wall of the rotating shaft is fixedly connected to a main gear, and outer walls on both sides of the main gear are meshingly connected to outer walls of the auxiliary gear.

[0014] Preferably, a mounting sleeve is fixedly connected to the outer wall of the rotating shaft, a water tank is fixedly connected to the outer wall of the mounting sleeve, a water outlet hole is opened on the outer wall of the mounting shell, and a water deflector is fixedly connected to the interior of the main gear.

[0015] Preferably, the outer wall of the oil extraction pipe is fixedly connected to a mounting seat on one side of the drainage hole, a connecting rod is rotatably connected to the inside of the mounting seat, a sealing plate is fixedly connected to the outer wall of the connecting rod, the outer wall of the sealing plate is rotatably connected to the inner wall of the oil extraction pipe, a handle is fixedly connected to the outer wall of the top of the connecting rod, a socket is provided on the outer wall of the top of the handle, a telescopic rod is fixedly connected to the outer wall of the top of the mounting seat below the socket, and the outer wall of the top of the telescopic rod is movably plugged into the outer wall of the bottom of the socket.

[0016] An online monitoring system for dissolved gas in transformer oil is implemented based on an online monitoring device for dissolved gas in transformer oil. The online monitoring system for dissolved gas in transformer oil comprises the following steps:

[0017] Step 1: Seal the oil inlet and outlet of the oil pipe: A relatively closed space is formed by the oil pipe to effectively isolate external impurities and protect the safety and stable operation of the detection device. At the same time, it effectively prevents impurities from entering the oil tank and protects the cleanliness and integrity of the inside of the oil tank.

[0018] Step 2: Open the drain hole: When the blocking plate rotates, it leaves the top of the sealing plate, releasing the pressure on the sealing plate. Under the action of the push spring, the sealing plate moves upward and leaves the inside of the drain hole, so that the drain hole is opened to facilitate the cleaning and discharge of impurities;

[0019] Step 3: Start the flushing mechanism for cleaning: Start the water pump to transfer water to the diversion pipe through the connecting main pipe, and then to pipe one and pipe two respectively.

[0020] Water enters the telescopic tube through pipe one, pushing the cleaning mechanism to move, and at the same time, water is sprayed out through pipe two and falls on the water tank, using the impact force to drive the water tank, rotating shaft, main gear and other mechanical parts to rotate;

[0021] Step 4: Combined cleaning with the rotating brush and the cleaning brush: When the main gear rotates, it drives the secondary gear and the mounting rod to rotate, and then drives the rotating brush to rotate. At the same time, the water-splashing plate rotates with the main gear, bringing up the water at the bottom of the cavity and throwing it out through the water outlet to flush the inner wall of the oil extraction pipe. The rotating brush and the cleaning brush work together to remove dirt, oil stains and other impurities on the inner wall of the oil extraction pipe;

[0022] Step 5: Restore the oil extraction pipe status: stop the water pump, remove the connection between the water pump output end and the connecting pipe, separate the connecting pipe and the water pump; pull the connecting pipe to drive the installation shell to move back, and discharge the internal water by squeezing the telescopic tube to restore the installation shell to its original position.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention proposes an online monitoring device and system for dissolved gas in transformer oil. The inner wall of the oil pipe is cleaned by a cleaning brush driven by an installation shell, thereby avoiding residual oil, impurities and gas in the oil pipe during the sampling process. If these residues are not cleaned in time, they will contaminate subsequent oil samples and affect the accuracy of the analysis results. Accordingly, by regularly cleaning the oil pipe, the oil pipe can be kept clean and the failures and errors caused by the contamination of the oil pipe can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the oil tank structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the oil extraction pipe structure of the present invention;

[0028] Figure 4 This is a schematic diagram of the cross-sectional structure of the oil extraction pipe of the present invention;

[0029] Figure 5 This is a schematic structural diagram of a cross-sectional view of one end of the oil extraction pipe of the present invention;

[0030] Figure 6 This is a schematic diagram of the internal structure of the sealing shell of the present invention;

[0031] Figure 7 This is a schematic diagram of the internal structure of the installation shell of the present invention;

[0032] Figure 8 It is a schematic diagram of the structure of the rotating brush of the present invention;

[0033] Fig. 9 This is a schematic diagram of the shunt pipe structure of the present invention;

[0034] Fig.10 This is a schematic diagram of the main gear structure of the present invention;

[0035] Fig.11 For the present invention Figure 4 A is an enlarged schematic diagram of the structure at location A;

[0036] Fig.12 It is a flow chart of the present invention.

[0037] In the figure: 1, oil tank; 11, detection device body; 2, oil extraction pipe; 21, sealing shell; 3, threaded rod; 31, plugging shell; 4, connecting main pipe; 41, shunt pipe; 42, pipeline 1;

[0038] 43. telescopic tube; 44. pipe 2; 5. mounting shell; 51. rotating brush; 52. cleaning brush;

[0039] 53. Main gear; 54. Sub gear; 55. Mounting rod; 6. Water outlet; 61. Cavity;

[0040] 62. Rotating shaft; 63. Water tank; 64. Water splash plate; 7. Mounting seat; 71. Connecting rod;

[0041] 72. telescopic rod; 73. plug hole; 74. blocking plate; 8. drainage hole; 81. U-shaped frame;

[0042] 82. Sealing plate; 83. Push spring. DETAILED DESCRIPTION

[0043] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit 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.

[0044] For example, see Figure 1-Figure 12 The present invention provides an online monitoring device for dissolved gas in transformer oil and a system technical solution: the online monitoring device for dissolved gas in transformer oil comprises: an oil tank 1 and a detection device body 11, an outer wall of one side of the oil tank 1 is fixedly connected with an oil extraction pipe 2, an outer wall of one end of the oil extraction pipe 2 is fixedly connected with an outer wall of one side of the detection device body 11, an outer wall of the oil extraction pipe 2 is fixedly connected with a sealing shell 21, a blocking shell 31 is slidably connected inside the sealing shell 21, a cleaning mechanism is arranged inside the sealing shell 21, a flushing mechanism is arranged inside the sealing shell 21, the flushing mechanism comprises a connecting main pipe 4, an outer wall of the connecting main pipe 4 is movably connected with an outer wall at the top of the sealing shell 21, the cleaning mechanism comprises an installation shell 5, an outer wall of the installation shell 5 is movably connected with the inside of the blocking shell 31, an outer wall at the top of the blocking shell 31 is fixedly connected with a base, a threaded rod 3 is rotatably connected inside the base, a threaded hole is provided on the outer wall at the top of the sealing shell 21, and the inner wall of the threaded hole is threadedly connected with the outer wall of the threaded rod 3.

[0045] The inside of the oil extraction pipe 2 is sealed by the sealing shell 31, so that the oil inside the transformer is prevented from entering the inside of the oil extraction pipe 2, which facilitates the cleaning of the inside of the oil extraction pipe 2. At the same time, it effectively prevents impurities from entering the inside of the oil tank 1, thereby protecting the cleanliness and integrity of the inside of the oil tank 1.

[0046] Embodiment 2, on the basis of embodiment 1, the outer wall of the bottom of the connecting main pipe 4 is fixedly connected to the diverter pipe 41, the outer wall of the bottom is fixedly connected to the pipe 1 42, the outer wall of the bottom of the pipe 1 42 is fixedly connected to the telescopic tube 43, the outer wall of one end of the telescopic tube 43 is fixedly connected to the inner wall of the blocking shell 31, and the outer wall of the other end of the telescopic tube 43 is fixedly connected to the outer wall of one side of the mounting shell 5.

[0047] By injecting water to push the telescopic tube 43 and the cleaning mechanism to move, a certain degree of automated operation is achieved, manual intervention is reduced, and cleaning efficiency is improved. At the same time, compared with the traditional mechanical cleaning method, the water pressure and the flexibility of the telescopic tube 43 are used to push the cleaning mechanism to move, thereby reducing physical damage to the inner wall of the oil extraction pipe 2 and extending the service life of the oil extraction pipe 2.

[0048] The cleaning brush 52 is driven by the mounting shell 5 to clean the inner wall of the oil extraction pipe 2, thereby avoiding residual oil, impurities and gas in the oil extraction pipe 2 during the sampling process. If these residues are not cleaned in time, they will contaminate subsequent oil samples and affect the accuracy of the analysis results. Accordingly, by regularly cleaning the oil extraction pipe 2, the oil extraction pipe 2 can be kept clean and the failures and errors caused by the contamination of the oil extraction pipe 2 can be reduced.

[0049] Embodiment 3, on the basis of embodiment 2, the outer wall of one end of the shunt pipe 41 is connected through the inner wall of the mounting shell 5, the outer wall of the shunt pipe 41 is located inside the mounting shell 5 and is fixedly connected with a pipe 2 44, the outer wall of the rotating shaft 62 is fixedly connected with a mounting sleeve, the outer wall of the mounting sleeve is fixedly connected with a water trough 63, the outer wall of the mounting shell 5 is provided with a water outlet hole 6, and the interior of the main gear 53 is fixedly connected with a water deflector 64.

[0050] The water tank 63 drives the installation sleeve to rotate, and then the rotation of the installation sleeve can make the rotating shaft 62 rotate inside the cavity 61, so that the rotating shaft 62 drives the main gear 53 to rotate. By using the impact force of water to drive the mechanical parts, complex transmission mechanisms and motors are omitted, thereby simplifying the mechanical structure and reducing manufacturing costs and maintenance costs.

[0051] When the water is thrown out by the water-repelling plate 64 and enters the inner wall of the oil extraction pipe 2, it will flush the inner wall, which helps the rotating brush 51 and the cleaning brush 52 to remove dirt, sediment, grease or other impurities on the inner wall of the oil extraction pipe 2. At the same time, the oil on the inner wall of the oil extraction pipe 2 can be flushed away after the water is sprayed. The flushing of the water flow can increase the cleaning effect of the cleaning brush 52 on the oil extraction pipe 2. Embodiment 4, on the basis of embodiment 3, a cleaning brush 52 is fixedly connected to the middle position of the outer wall of the mounting shell 5, a circular hole is opened on the outer wall of the mounting shell 5, and a mounting rod 55 is rotatably connected inside the circular hole. The outer wall of one end of the mounting rod 55 is fixedly connected to the rotating brush 51, and the outer wall of the other end of the mounting rod 55 is fixedly connected to the sub-gear 54. A cavity 61 is opened inside the mounting shell 5, and the inner walls on both sides of the cavity 61 are rotatably connected to the rotating shaft 62. The outer wall of the rotating shaft 62 is fixedly connected to the main gear 53, and the outer walls on both sides of the main gear 53 are meshed with the outer wall of the sub-gear 54.

[0052] The bristles of the rotating brush 51 generate friction with the inner wall of the oil extraction pipe 2 during rotation, and the friction can effectively remove dirt and oil stains on the inner wall of the oil extraction pipe 2, thereby enhancing the cleaning effect and making the inner wall of the oil extraction pipe 2 cleaner.

[0053] Embodiment 5, on the basis of embodiment 1, the outer wall of the oil extraction pipe 2 is located on one side of the drainage hole 8 and is fixedly connected to a mounting seat 7, a connecting rod 71 is rotatably connected to the inside of the mounting seat 7, the outer wall of the connecting rod 71 is fixedly connected to a sealing plate 74, the outer wall of the sealing plate 74 is rotatably connected to the inner wall of the oil extraction pipe 2, the outer wall of the top of the connecting rod 71 is fixedly connected to a handle, a socket 73 is provided on the outer wall of the top of the handle, the outer wall of the top of the mounting seat 7 is located below the socket 73 and is fixedly connected to a telescopic rod 72, the outer wall of the top of the telescopic rod 72 is movably connected to the outer wall of the bottom of the socket 73.

[0054] By keeping the oil extraction pipe 2 in a closed state during cleaning, impurities are prevented from entering the oil tank 1 and the interior of the detection device body 11 when the oil extraction pipe 2 is cleaned. Accordingly, a relatively closed space is formed by the oil extraction pipe 2 to effectively isolate external impurities and protect the safe and stable operation of the detection device body 11. The drainage hole 8 can be opened and operated only when the sealing plate 74 is in the working state.

[0055] Embodiment 6, on the basis of embodiment 5, a drainage hole 8 is opened at the lower part of the inside of the oil extraction pipe 2, a U-shaped frame 81 is fixedly connected to the lower part of the inner wall of the drainage hole 8, a push spring 83 is fixedly connected to the upper part of the inside of the U-shaped frame 81, a sealing plate 82 is fixedly connected to the outer wall of the top of the push spring 83, and the outer wall of the sealing plate 82 is movably connected to the inner wall of the drainage hole 8.

[0056] When the drain hole 8 is kept in an open state, it is convenient for the cleaning mechanism to discharge the impurities cleaned inside the oil extraction pipe 2 through the drain hole 8, thereby increasing the cleaning of the inner wall of the oil extraction pipe 2.

[0057] In actual use, first of all, the type and content of gases dissolved in transformer oil are key indicators for evaluating the operating status of the transformer. These gases, such as hydrogen, methane, acetylene, etc., can reflect abnormal conditions such as temperature, arc discharge, local overheating, etc. inside the transformer. However, the accuracy of this monitoring process is highly dependent on the cleanliness of the oil extraction pipe 2. If the oil extraction pipe 2 is contaminated or blocked, the oil sample may be interfered by external impurities during the extraction process, resulting in distortion of the monitoring data. These distorted data will conceal the true operating status of the transformer, or cause false alarms, thereby misleading the operation and maintenance personnel. Therefore, ensuring the cleanliness of the oil extraction pipe 2 is a prerequisite for obtaining accurate monitoring data.

[0058] The operator rotates the threaded rod 3 counterclockwise, and the movement of the threaded rod 3 can drive the sealing shell 31 to move downward inside the sealing shell 21, so that the sealing shell 31 seals the inside of the oil extraction pipe 2, thereby preventing the oil inside the transformer from entering the inside of the oil extraction pipe 2, and correspondingly facilitating the cleaning of the inside of the oil extraction pipe 2. At the same time, it effectively prevents impurities from entering the inside of the oil tank 1, thereby protecting the cleanliness and integrity of the inside of the oil tank 1.

[0059] After the operator has sealed the oil inlet end of the oil extraction pipe 2, the operator presses the telescopic rod 72 downward, so that the telescopic rod 72 moves downward under pressure and can leave the inside of the insertion hole 73, thereby releasing the fixation of the telescopic rod 72 to the insertion hole 73, and the handle can move freely. Then, the operator turns the handle 90 degrees, and then through the movement of the handle, the connecting rod 71 drives the sealing plate 74 to rotate inside the oil extraction pipe 2, thereby sealing the oil outlet at one end of the oil extraction pipe 2, so that the oil extraction pipe 2 remains in a closed state during cleaning, thereby preventing impurities from entering the interior of the oil tank 1 and the detection device body 11 when cleaning the oil extraction pipe 2. Accordingly, a relatively closed space is formed by the oil extraction pipe 2, which effectively isolates external impurities and protects the safe and stable operation of the detection device body 11.

[0060] When the sealing plate 74 rotates inside the oil extraction pipe 2, the sealing plate 74 can leave the top of the sealing plate 82, thereby releasing the pressure of the sealing plate 74 on the sealing plate 82. At this time, under the action of the pushing spring 83, the sealing plate 82 can be pushed upward, so that the sealing plate 82 leaves the inside of the drainage hole 8, and the drainage hole 8 can be opened. When the drainage hole 8 remains in the open state, it is convenient for the cleaning mechanism to discharge the impurities cleaned inside the oil extraction pipe 2 through the drainage hole 8, thereby increasing the cleanliness of the inner wall of the oil extraction pipe 2.

[0061] It should be noted that the flushing mechanism can start working by connecting the output end of the water pump to one end of the connecting pipe 4 and then connecting the other end of the water pump to a water source, and starting the water pump.

[0062] The water entering the connecting main pipe 4 can be transferred to the inside of the shunt pipe 41 through the connecting main pipe 4, and then the water is respectively transferred to the inside of the pipe 1 42 and the pipe 2 44 through the shunt pipe 41. When the water enters the inside of the telescopic pipe 43 through the pipe 1 42, the two ends of the telescopic pipe 43 are in a closed state. As the amount of water increases, the water pressure inside the telescopic pipe 43 will gradually increase. This water pressure will produce outward pressure on the pipe wall of the telescopic pipe 43, resulting in a certain elongation in the length direction, thereby promoting the movement of the cleaning mechanism. The telescopic pipe 43 and the cleaning mechanism are promoted to move by water injection, thereby achieving a certain degree of automated operation, reducing manual intervention, and improving cleaning efficiency. At the same time, compared with the traditional mechanical cleaning method, the water pressure and the flexibility of the telescopic pipe 43 are used to promote the movement of the cleaning mechanism, thereby reducing physical damage to the inner wall of the oil extraction pipe 2 and extending the service life of the oil extraction pipe 2.

[0063] Then, by utilizing the water pressure and the extension effect of the telescopic tube 43, the installation shell 5 can be pushed away from the inside of the blocking shell 31 and into the inside of the oil extraction pipe 2, so that the installation shell 5 can drive the cleaning brush 52 to clean the inner wall of the oil extraction pipe 2, thereby avoiding the oil stains, impurities and gases remaining in the oil extraction pipe 2 during the sampling process. If these residues are not cleaned in time, they will contaminate the subsequent oil samples and affect the accuracy of the analysis results. Accordingly, by regularly cleaning the oil extraction pipe 2, the oil extraction pipe 2 can be kept clean, and the failures and errors caused by the contamination of the oil extraction pipe 2 can be reduced.

[0064] When water is sprayed out through the second pipe 44, since the second pipe 44 is aligned with the water tank 63, the water sprayed out from the second pipe 44 can fall on the water tank 63, and then the impact force of the water spraying is utilized, and then the water tank 63 drives the installation sleeve to rotate, and then through the rotation of the installation sleeve, the rotating shaft 62 can be rotated inside the cavity 61, so that the rotating shaft 62 drives the main gear 53 to rotate. By utilizing the impact force of water to drive the mechanical parts, complex transmission mechanisms and motors and other parts are omitted, thereby simplifying the mechanical structure and reducing manufacturing costs and maintenance costs.

[0065] Through the meshing connection between the main gear 53 and the sub gear 54, the sub gear 54 can drive the mounting rod 55 to rotate as the main gear 53 rotates, and then the mounting rod 55 rotates inside the circular hole, so that the rotating brush 51 can rotate as it rotates when cleaning the inner wall of the oil extraction pipe 2. The bristles of the rotating brush 51 generate friction with the inner wall of the oil extraction pipe 2 during the rotation process, and the friction can effectively remove dirt and oil stains on the inner wall of the oil extraction pipe 2, thereby enhancing the cleaning effect and making the inner wall of the oil extraction pipe 2 cleaner.

[0066] It should be noted that telescopic plates are provided at both ends of the telescopic tube 43 , and the telescopic plates are fixedly connected to the outer wall of one side of the mounting shell 5 , so as to limit the movement of the mounting shell 5 , so that the mounting shell 5 can only move forward and backward without rotating.

[0067] By setting the water-dispelling plate 64, when the rotating shaft 62 drives the main gear 53 to rotate, the main gear 53 drives the water-dispelling plate 64 to rotate accordingly. Through the rotation of the water-dispelling plate 64, the water at the bottom of the cavity 61 can be brought up and thrown out through the water outlet 6. When the water is thrown out by the water-dispelling plate 64 and enters the inner wall of the oil extraction pipe 2, it will flush the inner wall, which helps to help the rotating brush 51 and the cleaning brush 52 remove dirt, sediment, grease or other impurities on the inner wall of the oil extraction pipe 2. At the same time, the oil on the inner wall of the oil extraction pipe 2 can also be flushed away after the water is sprayed. The flushing of the water flow can increase the cleaning effect of the cleaning brush 52 on the oil extraction pipe 2.

[0068] The operator stops the water pump and removes the connection between the output end and the connecting pipe 4, so that the connecting pipe 4 can be separated from the water pump. At this time, the operator pulls the connecting pipe 4 by hand, and the connecting pipe 4 is subjected to a force, so that the connecting pipe 4 can drive the mounting shell 5 to move back. Then, the mounting shell 5 moves back to squeeze the telescopic tube 43, so that the water in the telescopic tube 43 can be discharged through one end of the connecting pipe 4, so that the mounting shell 5 returns to its original position.

[0069] It should be noted that: by opening the inspection port on the sealing shell 21 , the blocking shell 31 can be taken out from the inside of the sealing shell 21 , and the rotating brush 51 and the cleaning brush 52 can be replaced or cleaned.

[0070] It should be noted that: when cleaning the oil extraction pipe 2, it is necessary to ensure that the online monitoring device and related modules of the system are in a closed or standby state to avoid contamination or damage to the monitoring device by the gas or impurities generated during the cleaning process. At the same time, after the cleaning is completed, the monitoring device and system need to be calibrated and verified to ensure that they can operate normally and accurately record the monitoring data.

[0071] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An on-line monitoring device for dissolved gas in transformer oil, characterized in that: The online monitoring device for dissolved gas in transformer oil comprises: an oil tank (1) and a detection device body (11); an outer wall of one side of the oil tank (1) is fixedly connected to an oil extraction pipe (2); an outer wall of one end of the oil extraction pipe (2) is fixedly connected to an outer wall of one side of the detection device body (11); a sealing shell (21) is fixedly connected to the outer wall of the oil extraction pipe (2); a blocking shell (31) is slidably connected to the interior of the sealing shell (21); a cleaning mechanism is provided inside the sealing shell (21); and a flushing mechanism is provided inside the sealing shell (21); The flushing mechanism comprises a connecting main pipe (4), the outer wall of the connecting main pipe (4) being movably connected to the outer wall of the top of the sealing shell (21); The cleaning mechanism comprises a mounting shell (5), the outer wall of the mounting shell (5) being movably connected to the interior of the blocking shell (31).

2. The on-line monitoring device for dissolved gas in transformer oil according to claim 1, characterized in that: The outer wall of the bottom of the connecting main pipe (4) is fixedly connected to a shunt pipe (41), the outer wall of the bottom is fixedly connected to a pipe 1 (42), the outer wall of the bottom of the pipe 1 (42) is fixedly connected to a telescopic pipe (43), the outer wall of one end of the telescopic pipe (43) is fixedly connected to the inner wall of the blocking shell (31), and the outer wall of the other end of the telescopic pipe (43) is fixedly connected to the outer wall of one side of the mounting shell (5).

3. The on-line monitoring device for dissolved gas in transformer oil according to claim 2, characterized in that: The outer wall of one end of the shunt pipe (41) is connected to the inner wall of the mounting shell (5) through the outer wall of the shunt pipe (41), and the outer wall of the shunt pipe (41) is located inside the mounting shell (5) and is fixedly connected to a second pipe (44).

4. The on-line monitoring device for dissolved gas in transformer oil according to claim 1, characterized in that: The outer wall of the top of the blocking shell (31) is fixedly connected to a base, and the inside of the base is rotatably connected to a threaded rod (3). The outer wall of the top of the sealing shell (21) is provided with a threaded hole, and the inner wall of the threaded hole is threadedly connected to the outer wall of the threaded rod (3).

5. The on-line monitoring device for dissolved gas in transformer oil according to claim 1, characterized in that: A cleaning brush (52) is fixedly connected to the middle of the outer wall of the mounting shell (5); a circular hole is provided on the outer wall of the mounting shell (5); a mounting rod (55) is rotatably connected inside the circular hole; a rotating brush (51) is fixedly connected to the outer wall at one end of the mounting rod (55); and a sub-gear (54) is fixedly connected to the outer wall at the other end of the mounting rod (55).

6. The on-line monitoring device for dissolved gas in transformer oil according to claim 5, characterized in that: A cavity (61) is provided inside the mounting shell (5); inner walls on both sides of the cavity (61) are rotatably connected to a rotating shaft (62); an outer wall of the rotating shaft (62) is fixedly connected to a main gear (53); and outer walls on both sides of the main gear (53) are meshingly connected to outer walls of a sub-gear (54).

7. An on-line monitoring device for dissolved gas in transformer oil according to claim 6, characterized in that: The outer wall of the rotating shaft (62) is fixedly connected to a mounting sleeve, the outer wall of the mounting sleeve is fixedly connected to a water tank (63), the outer wall of the mounting shell (5) is provided with a water outlet hole (6), and the interior of the main gear (53) is fixedly connected to a water deflector (64).

8. The on-line monitoring device for dissolved gas in transformer oil according to claim 1, characterized in that: The outer wall of the oil extraction pipe (2) is located on one side of the drainage hole (8) and is fixedly connected to a mounting seat (7); a connecting rod (71) is rotatably connected to the interior of the mounting seat (7); a sealing plate (74) is fixedly connected to the outer wall of the connecting rod (71); the outer wall of the sealing plate (74) is rotatably connected to the inner wall of the oil extraction pipe (2); a handle is fixedly connected to the outer wall of the top of the connecting rod (71); a plug hole (73) is provided on the outer wall of the top of the handle; a telescopic rod (72) is fixedly connected to the outer wall of the top of the mounting seat (7) below the plug hole (73); the outer wall of the top of the telescopic rod (72) is movably plugged into the outer wall of the bottom of the plug hole (73).

9. An online monitoring system for dissolved gas in transformer oil, which is realized based on the online monitoring device for dissolved gas in transformer oil according to any one of claims 1 to 8, characterized in that: An online monitoring system for dissolved gas in transformer oil comprises the following steps: Step 1: Blocking the oil inlet and outlet of the oil extraction pipe (2): A relatively closed space is formed by the oil extraction pipe (2), effectively isolating external impurities, protecting the safe and stable operation of the detection device body (11), and effectively preventing impurities from entering the interior of the oil tank (1), protecting the cleanliness and integrity of the interior of the oil tank (1); Step 2: Opening the drain hole (8): The blocking plate (74) rotates and leaves the top of the sealing plate (82), releasing the pressure on the sealing plate (82). Under the action of the push spring (83), the sealing plate (82) moves upward and leaves the inside of the drain hole (8), so that the drain hole (8) is opened to facilitate cleaning and discharge of impurities; Step 3: Start the flushing mechanism to clean: Start the water pump, so that water is transferred to the diversion pipe (41) through the connecting main pipe (4), and then transferred to pipe 1 (42) and pipe 2 (44) respectively. Water enters the telescopic pipe (43) through pipe 1 (42), pushing the cleaning mechanism to move, and at the same time, water is sprayed out through pipe 2 (44) and falls on the water tank (63), using the impact force to drive the water tank (63), the rotating shaft (62), the main gear (53) and other mechanical parts to rotate; Step 4: Cleaning by the rotating brush (51) and the cleaning brush (52): When the main gear (53) rotates, the secondary gear (54) and the mounting rod (55) are driven to rotate, thereby driving the rotating brush (51) to rotate. At the same time, the water-discharging plate (64) rotates with the main gear (53), bringing up the water at the bottom of the cavity (61) and throwing it out through the water outlet (6), flushing the inner wall of the oil extraction pipe (2). The rotating brush (51) and the cleaning brush (52) work together to remove dirt, oil stains and other impurities on the inner wall of the oil extraction pipe (2); Step 5: Restore the oil extraction pipe (2): Stop the water pump, remove the connection between the water pump output end and the connecting pipe (4), and separate the connecting pipe (4) from the water pump; pull the connecting pipe (4) to drive the installation shell (5) to move back, and discharge the internal water by squeezing the telescopic tube (43), so that the installation shell (5) returns to its original position.

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