Online monitoring device for dissolved gas in chromatographic transformer oil

Abstract

The invention discloses a chromatographic type on-line monitoring device for dissolved gas in transformer oil, which comprises a protection box, a glass injector and a rubber plug arranged at the bottom of the glass injector, a mounting port is arranged at the top of the protection box close to the rear side, the bottom of the glass injector penetrates through the mounting port and extends to the inner cavity of the protection box, and the rubber plug is arranged in the inner cavity of the protection box. Two clamping mechanisms are arranged in an inner cavity of the protection box and are symmetrically arranged up and down, and a bottom plate is arranged at the position, close to the bottom, of the inner cavity of the protection box. Through mutual cooperation of the fixed motor, the first fixed part, the second fixed part, the fan-shaped toothed plate, the vibration gear, the third fixed part, the rotating plate, the bottom plate, the transverse plate, the movable plate, the clamping plate, the movable plate and the like, a mechanical oscillation degassing process in a traditional laboratory can be integrated into an oil sample transportation link; the detection efficiency is improved, the labor cost is optimized, and meanwhile gas dissipation or oxidation caused by long-time storage is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of transformer maintenance, in particular to a chromatographic type online monitoring device for dissolved gas in transformer oil. Background Art

[0002] Transformer oil chromatograph is a precision analytical instrument specially used to monitor dissolved gases in transformer insulating oil. It uses gas chromatography technology to identify and quantify the gas components in the oil, and then diagnose potential internal faults of the transformer, such as partial discharge, overheating, arcing, etc.

[0003] If the transformer oil chromatograph needs to detect the insulating oil of the transformer, it is necessary to first take out the lower layer of oil at the bottom of the transformer and collect it with a glass syringe, and then put the glass syringe with the collected insulating oil into a box and take it back to the laboratory for testing.

[0004] However, when the staff conducts testing on the glass syringe filled with insulating oil, they still need to go through a series of degassing operations, such as injecting nitrogen and accelerating the release of gas in the oil through mechanical oscillation. The mechanical oscillation method generally takes about 30 minutes to oscillate, which increases the staff's invisible working time and reduces analysis efficiency. Summary of the invention

[0005] To achieve the above object, the present invention provides the following technical solutions: A chromatographic type online monitoring device for dissolved gas in transformer oil, comprising a protective box, a glass syringe and a rubber plug installed at the bottom of the glass syringe, wherein a mounting port is provided at the top of the protective box near the rear side, the bottom of the glass syringe passes through the mounting port and extends to the inner cavity of the protective box, the inner cavity of the protective box has two clamping mechanisms, and the two clamping mechanisms are symmetrically arranged up and down, the inner cavity of the protective box has a bottom plate near the bottom, the top of the bottom plate near the four corners are penetrated by vertical rods and fixedly connected thereto, a plurality of the vertical rods are commonly sleeved with a fixing plate on the outside, a plurality of the vertical rods are sleeved with a reset spring on the outside, the top of the reset spring is fixedly connected to the bottom plate, and the bottom of the reset spring is fixedly connected to the fixing plate A fixed connection is provided, a rear plate is fixedly connected to the center of the rear side of the fixed plate, the rear side of the rear plate is fixedly connected to the inner wall of the protective box, a rectangular opening is opened at the top of the bottom plate near the left and right sides, an elastic limit block is fixedly connected to the top of the fixed plate near the left and right sides, a lifting plate is provided at the bottom of the fixed plate, and the left and right sides of the lifting plate are slidably connected to the limit blocks, the two limit blocks are fixedly connected to a cross plate on the opposite sides, the two cross plates are fixedly connected to the inner wall of the protective box on the opposite sides, the two limit blocks are fixedly connected to a connecting plate on the side corresponding to the limit blocks, the tops of the two connecting plates are fixedly connected to limit springs, and the tops of the two limit springs are fixedly connected to the lifting plate.

[0006] Preferably, there is a positioning plate at the bottom of the lifting plate, a welding plate is fixedly connected at the center of the rear side of the positioning plate, the rear side of the welding plate is fixedly connected to the inner wall of the protective box, a first trigger is installed at the top of the positioning plate near the left side, a third trigger is installed at the top of the positioning plate near the right side, a second trigger is installed at the top of the fixed plate near the left side, and a starter is installed at the top of the protective box near the front side.

[0007] Preferably, there is a card plate on the top of the rear plate, a flip plate is hinged on the front side of the card plate, a fourth trigger is provided on the top of the card plate, the rear side of the fourth trigger is fixedly connected to the inner wall of the protective box, a movable spring is fixedly connected between the flip plate and the rear plate, and through holes are opened at the centers of the bottom plate, fixed plate, lifting plate and positioning plate.

[0008] Preferably, there is an operation box at the bottom of the positioning plate, an air outlet pipe is provided at the top of the operation box near the left side, an air inlet pipe is provided at the top of the operation box near the right side, a needle is installed on the top of the air outlet pipe, the top of the air outlet pipe passes through the through hole located on the positioning plate, and the needle passes through the through hole located on the lifting plate.

[0009] Preferably, there is a nitrogen extractor on the right side of the operation box, an air supply pipe is connected to the top end of the air inlet pipe, and the other end of the air supply pipe is connected to the nitrogen extractor. A cavity is provided in the inner cavity of the operation box, and the inner cavity of the air outlet pipe and the cavity are mutually connected. A vertical groove is provided in the inner cavity of the operation box near the right side, and a horizontal groove is provided on the left side of the vertical groove near the bottom, and the horizontal groove and the cavity are mutually connected. A movable ball is fitted near the bottom of the inner cavity of the vertical groove, and a lower spring is fixedly connected to the bottom of the movable ball, and the bottom end of the lower spring is fixedly connected to the bottom of the vertical groove.

[0010] Preferably, the cavity is provided with a sliding rod, a blind hole is provided in the inner cavity of the sliding rod, a sealing ball is fitted near the center of the inner cavity of the blind hole, a connecting spring is fixedly connected to the left side of the sealing ball, the left end of the connecting spring is fixedly connected to the left side of the inner cavity of the blind hole, ventilation holes are provided on the upper and lower sides of the sliding rod, the two ventilation holes are interconnected with the inner cavity of the blind hole, the diameter of the outer side of the sliding rod near the right end is larger than that of the left end, and the outer side of the sliding rod near the right end is fitted with the cavity, and the left end of the sliding rod passes through the inner cavity of the operating box.

[0011] Preferably, the left end of the sliding rod is fixedly connected to a linkage block, a hinged plate is hinged on the left side of the linkage block, a limit plate is fixedly connected to the left side of the operating box near the bottom, the hinged plate and the limit plate are jointly hinged to a swing block near the left side, a pull rope is provided on the swing block, the left end of the pull rope is fixedly connected to the bottom cylinder, and the bottom of the bottom cylinder is fixedly connected to the bottom of the inner cavity of the protective box.

[0012] Preferably, the clamping mechanism includes a movable plate, the top of the movable plate is provided with oblique openings near the left and right sides, the inner cavities of the two oblique openings are slidably connected with movable plates, the corresponding sides of the two movable plates are hinged with clamps, the corresponding sides of the two clamps are fitted with the outer side of the glass syringe, the front side of the movable plate is provided with a second fixing part, the inner cavity of the second fixing part is provided with an output cylinder, the power output shaft of the output cylinder is fixedly connected to the center of the front side of the movable plate, and the second fixing part located above is fixedly connected to the inner wall of the protective box.

[0013] Preferably, the bottom of the second fixing member located at the bottom is fixedly connected to a fixing frame, the inner cavity of the fixing frame is provided with a placement opening, the inner cavity of the placement block opening is installed with a third fixing member, the top of the fixing frame is installed with a first fixing member, the rear side of the first fixing member is plugged with a first rotating shaft, the outer side of the first rotating shaft is fixedly sleeved with a swing frame near the center, the rear end of the first rotating shaft is fixedly connected with a fan-shaped toothed plate, the front side of the third fixing member is fixedly connected with a fixed motor, the fixed motor power output shaft passes through the third fixing member and is fixedly connected with a rotating plate, an annular opening is provided on the swinging frame, the rear side of the rotating plate is fixedly connected with a movable sliding rod near the bottom, the movable sliding rod is fitted with the annular opening, and the rotating plate and the swinging frame are located between the second fixing member and the third fixing member.

[0014] Preferably, a second rotating shaft is passed through the inner cavity of the second fixing member, a vibration gear is fixedly connected to the rear end of the second rotating shaft, the vibration gear and the sector-shaped tooth plate are meshed with each other, and the front end of the second rotating shaft is fixedly connected to the movable plate located below.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can automate the step of injecting nitrogen through the mutual cooperation between the components such as the reset spring, the bottom plate, the fixing plate, the lifting plate, the positioning plate, the vertical rod, the limit block, the horizontal plate, the limit spring, the first trigger, the second trigger, etc., so as to facilitate the gas replacement during the degassing process, avoid the mixing of oxygen, maintain the purity of the oil sample, reduce the operating steps of the staff, and improve the analysis efficiency; 2. The present invention can integrate the mechanical oscillation degassing process in the traditional laboratory into the oil sample transportation link through the mutual coordination between the fixed motor, the first fixed part, the second fixed part, the fan-shaped tooth plate, the vibrating gear, the third fixed part, the rotating plate, the bottom plate, the horizontal plate, the movable plate, the clamping plate, the moving plate and other components, thereby achieving a leap in detection efficiency and optimization of labor costs, while avoiding gas escape or oxidation caused by long-term storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2It is a structural plan view of the glass syringe component of the present invention; Figure 3 It is a schematic diagram of the structure of the component clamping mechanism of the present invention; Figure 4 It is a bottom view of the component clamping mechanism structure of the present invention; Figure 5 It is a rear view of the component clamping mechanism structure of the present invention; Figure 6 This is a schematic diagram of the bottom plate structure of the component of the present invention; Figure 7 It is a plan view of the bottom plate structure of the component of the present invention; Figure 8 It is a schematic diagram of the swing frame structure of the component of the present invention; Fig. 9 It is a structural plan view of the component operation box of the present invention; Fig.10 This is a bottom view of the bottom plate structure of the component of the present invention; Fig.11 It is a plan view of the structure of the lifting plate of the component of the present invention; Fig.12 It is a left-side plan view of the bottom plate structure of the component of the present invention; Fig.13 This is a schematic diagram of the internal structure of the component operation box of the present invention; Fig.14 It is a schematic diagram of the structure of the component moving plate of the present invention.

[0017] Numbers in the figure: 1, protective box; 2, starter; 3, glass syringe; 4, rubber plug; 5, fixed motor; 6, fixed frame; 7, moving plate; 8, movable plate; 9, clamping plate; 10, first fixed part; 11, second fixed part; 12, swing frame; 13, fan-shaped tooth plate; 14, vibration gear; 15, third fixed part; 16, rotating plate; 17, bottom plate; 18, horizontal plate; 19, reset spring; 20, vertical rod; 21, fixed plate; 22, lifting plate; 23, positioning plate; 24, nitrogen extractor; 25, elastic limit block; 26, limit block; 27, bottom cylinder; 2 8. Pull rope; 29. ​​First trigger; 30. Second trigger; 31. Exhaust pipe; 32. Needle; 33. Limit spring; 34. Connecting plate; 35. Air pipe; 36. Operating box; 37. Swing block; 38. Hinge plate; 39. Limit plate; 40. Linkage block; 41. Slide rod; 42. Connecting spring; 43. Sealing ball; 44. Third trigger; 45. Active slide rod; 46. Active ball; 47. Lower spring; 48. Inlet pipe; 49. Rear plate; 50. Active spring; 51. Card plate; 52. Flip plate; 53. Fourth trigger; 54. Welding plate. DETAILED DESCRIPTION

[0018] 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.

[0019] See also Figure 1-14 , the present invention provides a technical solution: A chromatographic type transformer oil dissolved gas online monitoring device comprises a protection box 1, a glass syringe 3 and a rubber plug 4 installed at the bottom of the glass syringe 3. A mounting port is provided at the top of the protection box 1 near the rear side. The bottom of the glass syringe 3 penetrates the mounting port and extends to the inner cavity of the protection box 1. The inner cavity of the protection box 1 has two clamping mechanisms, and the two clamping mechanisms are symmetrically arranged up and down. A bottom plate 17 is provided near the bottom of the inner cavity of the protection box 1. Vertical rods 20 are penetrated near the four corners of the top of the bottom plate 17 and are fixedly connected thereto. A fixing plate 21 is commonly sleeved on the outer sides of the plurality of vertical rods 20. A reset spring 19 is sleeved on the outer sides of the plurality of vertical rods 20. The top of the reset spring 19 It is fixedly connected to the bottom plate 17, the bottom end of the return spring 19 is fixedly connected to the fixed plate 21, the rear center of the fixed plate 21 is fixedly connected with a rear plate 49, the rear side of the rear plate 49 is fixedly connected to the inner wall of the protective box 1, the top of the bottom plate 17 is provided with rectangular openings near the left and right sides, the top of the fixed plate 21 is fixedly connected with elastic limit blocks 25 near the left and right sides, the bottom of the fixed plate 21 is provided with a lifting plate 22, the left and right sides of the lifting plate 22 are slidably connected to the limit blocks 26, the opposite sides of the two limit blocks 26 are fixedly connected with the transverse plate 18, the opposite sides of the two transverse plates 18 are fixedly connected to the inner wall of the protective box 1, and the two limit blocks 26 are equivalent to one The sides are fixedly connected with connecting plates 34, the tops of the two connecting plates 34 are fixedly connected with limit springs 33, the tops of the two limit springs 33 are fixedly connected to the lifting plate 22, the bottom of the lifting plate 22 has a positioning plate 23, the center of the rear side of the positioning plate 23 is fixedly connected with a welding plate 54, the rear side of the welding plate 54 is fixedly connected to the inner wall of the protection box 1, the top of the positioning plate 23 is installed near the left side with a first trigger 29, the top of the positioning plate 23 is installed near the right side with a third trigger 44, the top of the fixing plate 21 is installed near the left side with a second trigger 30, the top of the protection box 1 is installed near the front side with a starter 2, the top of the rear plate 49 is provided with a card plate 51, the card plate 51 A flip plate 52 is hinged on the front side, and a fourth trigger 53 is provided on the top of the card plate 51. The rear side of the fourth trigger 53 is fixedly connected to the inner wall of the protective box 1. A movable spring 50 is fixedly connected between the flip plate 52 and the rear plate 49. Through holes are provided at the centers of the bottom plate 17, the fixed plate 21, the lifting plate 22 and the positioning plate 23. An operating box 36 is provided at the bottom of the positioning plate 23. An air outlet pipe 31 is provided at the top of the operating box 36 near the left side, and an air inlet pipe 48 is provided at the top of the operating box 36 near the right side. A needle 32 is installed at the top of the air outlet pipe 31, and the top of the air outlet pipe 31 passes through the through hole located on the positioning plate 23, and the needle 32 passes through the through hole located on the lifting plate 22.

[0020] A nitrogen extractor 24 is arranged on the right side of the operating box 36, an air delivery pipe 35 is plugged into the top end of the air inlet pipe 48, and the other end of the air delivery pipe 35 is plugged into the nitrogen extractor 24. A cavity is provided in the inner cavity of the operating box 36, and the inner cavity of the air outlet pipe 31 and the cavity are mutually connected. A vertical groove is provided in the inner cavity of the operating box 36 near the right side, and a horizontal groove is provided near the bottom on the left side of the vertical groove, and the horizontal groove and the cavity are mutually connected. A movable ball 46 is fitted near the bottom of the inner cavity of the vertical groove, and a lower spring 47 is fixedly connected to the bottom of the movable ball 46, and the lower end of the lower spring 47 is fixedly connected to the bottom of the vertical groove. A sliding rod 41 is provided in the cavity, and a blind hole is provided in the inner cavity of the sliding rod 41. A sealing ball 43 is fitted near the center of the inner cavity of the blind hole, and a connecting spring 42 is fixedly connected to the left side of the sealing ball 43. The left end of 42 is fixedly connected to the left side of the blind hole cavity, and ventilation holes are opened on the upper and lower sides of the sliding rod 41, and the two ventilation holes are mutually connected with the cavity of the blind hole. The diameter of the outer side of the sliding rod 41 near the right end is larger than the left end, and the outer side of the sliding rod 41 near the right end is in contact with the cavity, and the left end of the sliding rod 41 passes through the cavity of the operating box 36. The left end of the sliding rod 41 is fixedly connected to the linkage block 40, and the left side of the linkage block 40 is hinged with a hinged plate 38. The left side of the operating box 36 is fixedly connected to a limit plate 39 near the bottom, and the hinged plate 38 and the limit plate 39 are jointly hinged with a swing block 37 near the left side. A pull rope 28 is arranged on the swing block 37, and the left end of the pull rope 28 is fixedly connected to the bottom cylinder 27, and the bottom of the bottom cylinder 27 is fixedly connected to the bottom of the inner cavity of the protective box 1.

[0021] The clamping mechanism includes a movable plate 7, the top of the movable plate 7 is provided with an oblique opening near the left and right sides, the inner cavities of the two oblique openings are slidably connected with movable plates 8, the corresponding sides of the two movable plates 8 are hinged with clamping plates 9, the corresponding sides of the two clamping plates 9 are both fitted with the outer side of the glass syringe 3, the front side of the movable plate 7 is provided with a second fixing member 11, the inner cavity of the second fixing member 11 is provided with an output cylinder, the power output shaft of the output cylinder is fixedly connected to the center of the front side of the movable plate 7, the second fixing member 11 located at the top is fixedly connected to the inner wall of the protective box 1, the bottom of the second fixing member 11 located at the bottom is fixedly connected to the fixing frame 6, the inner cavity of the fixing frame 6 is provided with a placement opening, the inner cavity of the placement opening is installed with a third fixing member 15, the top of the fixing frame 6 is installed with a first fixing member 10, and the rear side of the first fixing member 10 is inserted A first rotating shaft is connected, a swing frame 12 is fixedly sleeved on the outer side of the first rotating shaft near the center, a sector tooth plate 13 is fixedly connected to the rear end of the first rotating shaft, a fixed motor 5 is fixedly connected to the front side of the third fixing member 15, the power output shaft of the fixed motor 5 passes through the third fixing member 15, and is fixedly connected to a rotating plate 16, an annular opening is provided on the swing frame 12, a movable slide bar 45 is fixedly connected to the rear side of the rotating plate 16 near the bottom, the movable slide bar 45 is fitted with the annular opening, the rotating plate 16 and the swing frame 12 are located between the second fixing member 11 and the third fixing member 15, a second rotating shaft is passed through the inner cavity of the second fixing member 11, a vibration gear 14 is fixedly connected to the rear end of the second rotating shaft, the vibration gear 14 and the sector tooth plate 13 are meshed with each other, and the front end of the second rotating shaft is fixedly connected to the movable plate 7 located below; The output end of the second trigger 30 is electrically connected to the input end of the output cylinder located above, the output end of the first trigger 29 is electrically connected to the input end of the bottom cylinder 27, the output end of the third trigger 44 is electrically connected to the input end of the output cylinder located above, and the third trigger 44 is a delay trigger, the output end of the fourth trigger 53 is electrically connected to the input end of the fixed motor 5, and a timer is provided inside the fixed motor 5, and the output end of the starter 2 is electrically connected to the input end of the output cylinder located below.

[0022] Working principle: First, the staff places the glass syringe 3 under the sampling valve of the transformer to extract oil. When the oil extraction is completed, the small bubbles inside the glass syringe 3 can be manually removed and inserted into the installation port on the top of the protection box 1. When the glass syringe 3 enters the inner cavity of the protection box 1, it can contact the top of the bottom plate 17 and drive the bottom plate 17 to move downward. When the bottom plate 17 moves downward, it can drive a number of vertical rods 20 to move downward synchronously. When the bottom plate 17 moves downward, it can contact the second trigger 30. When the second trigger 30 is activated, the output cylinder located above can be activated. When the output cylinder located above is activated, the movable plate 7 located above can be pushed to move backward. Since the movable plate 7 is provided with an oblique opening, the two movable plates 8 can drive the two clamping plates 9 to preliminarily fix the glass syringe 3. When the plurality of vertical rods 20 move downward, the lifting plate 22 can be driven to move downward. When the lifting plate 22 moves downward, it can contact the first trigger 29. When the first trigger 29 is activated, the bottom cylinder 27 can be triggered. The bottom cylinder 27 can pull the pull rope 28 through the power output shaft to move, thereby driving the swing block 37 to swing. When the swing block 37 swings, it can drive the slide bar 41 to move to the left through the hinge plate 38, so that the movable ball 46 moves downward to expose the gap. At the same time, when the slide bar 41 moves to the left, the nitrogen inside the nitrogen extractor 24 can be extracted into the inner cavity of the vertical groove through the gas pipe 35. When the nitrogen enters the inner cavity of the vertical groove, it can enter the blind hole through the horizontal groove and enter the inner cavity of the gas outlet pipe 31 through the two vents, thereby injecting the nitrogen into the interior of the glass syringe 3, eliminating oxygen and reducing external interference, and ensuring the accuracy of the oil sample analysis; When the lifting plate 22 moves downward, the third trigger 44 can be started at the same time, and the third trigger 44 can start the output cylinder located above again, and make the two adjacent clamping plates 9 move backwards and break away from the contact with the outer surface of the glass syringe 3. When the glass syringe 3 loses the external force, the lifting plate 22 can be reset by the limit spring 33. When the lifting plate 22 is reset, it can push the vertical rods 20 to move upward, and the vertical rods 20 can drive the bottom plate 17 to move upward. The bottom plate 17 can drive the flip plate 52 to flip. When the flip plate 52 flips upward, the fourth trigger 53 can be started, and when the fourth trigger 53 is triggered, the fixed motor 5 The fixed motor 5 can drive the rotating plate 16 to rotate through the power output shaft. When the rotating plate 16 rotates, it can drive the swing frame 12 to swing through the movable slide bar 45. When the swing frame 12 swings, it can drive the fan-shaped tooth plate 13 to swing back and forth, thereby driving the vibration gear 14 to rotate back and forth. When the vibration gear 14 rotates, it can drive the glass syringe 3 to swing back and forth, thereby accelerating the release of gas in the oil through high-frequency oscillation. The fixed motor 5 can be turned off by the timer inside the fixed motor 5. When the staff needs to take out the glass syringe 3, the starter 2 can be opened to reset the output cylinder located below and release the glass syringe 3.

[0023] 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. A chromatographic type on-line monitoring device for dissolved gas in transformer oil, comprising a protective box (1), a glass syringe (3) and a rubber stopper (4) mounted at the bottom of the glass syringe (3), characterized in that: The top of the protection box (1) is provided with an installation opening near the rear side, the bottom of the glass syringe (3) passes through the installation opening and extends to the inner cavity of the protection box (1), the inner cavity of the protection box (1) has two clamping mechanisms, and the two clamping mechanisms are symmetrically arranged in an upper and lower manner, the inner cavity of the protection box (1) has a bottom plate (17) near the bottom, the top of the bottom plate (17) near the four corners are penetrated by vertical rods (20) and are fixedly connected to the vertical rods, a plurality of the vertical rods (20) are commonly sleeved with a fixing plate (21) on the outside, a plurality of the vertical rods (20) are sleeved with a return spring (19) on the outside, the top of the return spring (19) is fixedly connected to the bottom plate (17), the bottom of the return spring (19) is fixedly connected to the fixing plate (21), the center of the rear side of the fixing plate (21) is fixedly connected with a rear plate (49), the rear plate The rear side of (49) is fixedly connected to the inner wall of the protection box (1), and a rectangular opening is opened at the top of the bottom plate (17) near the left and right sides. The top of the fixed plate (21) near the left and right sides is fixedly connected with elastic limit blocks (25), and the bottom of the fixed plate (21) has a lifting plate (22), and the left and right sides of the lifting plate (22) are slidably connected to limit blocks (26), and the two limit blocks (26) are fixedly connected to the transverse plate (18) on the opposite sides, and the two transverse plates (18) are fixedly connected to the inner wall of the protection box (1), and the two limit blocks (26) are fixedly connected to the corresponding sides with a connecting plate (34), and the tops of the two connecting plates (34) are fixedly connected to the limit springs (33), and the tops of the two limit springs (33) are fixedly connected to the lifting plate (22).

2. The chromatographic type on-line monitoring device for dissolved gas in transformer oil according to claim 1, characterized in that: A positioning plate (23) is provided at the bottom of the lifting plate (22); a welding plate (54) is fixedly connected to the center of the rear side of the positioning plate (23); the rear side of the welding plate (54) is fixedly connected to the inner wall of the protective box (1); a first trigger (29) is installed at the top of the positioning plate (23) near the left side; a third trigger (44) is installed at the top of the positioning plate (23) near the right side; a second trigger (30) is installed at the top of the fixed plate (21) near the left side; and a starter (2) is installed at the top of the protective box (1) near the front side.

3. A chromatographic type on-line monitoring device for dissolved gas in transformer oil according to claim 2, characterized in that: A card plate (51) is provided on the top of the rear plate (49), a flip plate (52) is hinged on the front side of the card plate (51), a fourth trigger (53) is provided on the top of the card plate (51), the rear side of the fourth trigger (53) is fixedly connected to the inner wall of the protective box (1), a movable spring (50) is fixedly connected between the flip plate (52) and the rear plate (49), and through holes are provided at the centers of the bottom plate (17), the fixed plate (21), the lifting plate (22) and the positioning plate (23).

4. A chromatographic type on-line monitoring device for dissolved gas in transformer oil according to claim 3, characterized in that: An operating box (36) is provided at the bottom of the positioning plate (23); an air outlet pipe (31) is provided at the top of the operating box (36) near the left side; an air inlet pipe (48) is provided at the top of the operating box (36) near the right side; a needle (32) is installed at the top of the air outlet pipe (31); the top of the air outlet pipe (31) passes through a through hole located on the positioning plate (23); and the needle (32) passes through a through hole located on the lifting plate (22).

5. A chromatographic type on-line monitoring device for dissolved gas in transformer oil according to claim 4, characterized in that: A nitrogen extractor (24) is provided on the right side of the operation box (36); a gas delivery pipe (35) is plugged into the top end of the air inlet pipe (48); the other end of the gas delivery pipe (35) is plugged into the nitrogen extractor (24); a cavity is provided in the inner cavity of the operation box (36); the inner cavity of the air outlet pipe (31) and the cavity are mutually connected; a vertical groove is provided in the inner cavity of the operation box (36) near the right side; a horizontal groove is provided in the left side near the bottom of the vertical groove; the horizontal groove and the cavity are mutually connected; a movable ball (46) is fitted in the inner cavity of the vertical groove near the bottom; a lower spring (47) is fixedly connected to the bottom of the movable ball (46); the bottom end of the lower spring (47) is fixedly connected to the bottom of the vertical groove.

6. The chromatographic type on-line monitoring device for dissolved gas in transformer oil according to claim 1, characterized in that: The cavity is provided with a slide rod (41), the inner cavity of the slide rod (41) is provided with a blind hole, the inner cavity of the blind hole is fitted with a sealing ball (43) near the center, the left side of the sealing ball (43) is fixedly connected with a connecting spring (42), the left end of the connecting spring (42) is fixedly connected to the left side of the inner cavity of the blind hole, the upper and lower sides of the slide rod (41) are provided with ventilation holes, the two ventilation holes are mutually connected with the inner cavity of the blind hole, the outer side of the slide rod (41) near the right end has a larger diameter than the left end, and the outer side of the slide rod (41) near the right end is fitted with the cavity, and the left end of the slide rod (41) passes through the inner cavity of the operation box (36).

7. The chromatographic type on-line monitoring device for dissolved gas in transformer oil according to claim 6, characterized in that: The left end of the slide bar (41) is fixedly connected to a linkage block (40), the left side of the linkage block (40) is hinged to a hinged plate (38), the left side of the operation box (36) is fixedly connected to a limit plate (39) near the bottom, the hinged plate (38) and the limit plate (39) are jointly hinged to a swing block (37) near the left side, a pull rope (28) is provided on the swing block (37), the left end of the pull rope (28) is fixedly connected to a bottom cylinder (27), and the bottom of the bottom cylinder (27) is fixedly connected to the bottom of the inner cavity of the protection box (1).

8. The chromatographic type on-line monitoring device for dissolved gas in transformer oil according to claim 1, characterized in that: The clamping mechanism comprises a movable plate (7), the top of the movable plate (7) is provided with an oblique opening near the left and right sides, the inner cavities of the two oblique openings are slidably connected to movable plates (8), the corresponding sides of the two movable plates (8) are hinged with clamping plates (9), the corresponding sides of the two clamping plates (9) are in contact with the outer side of the glass syringe (3), the front side of the movable plate (7) is provided with a second fixing member (11), the inner cavity of the second fixing member (11) is provided with an output cylinder, the power output shaft of the output cylinder is fixedly connected to the center of the front side of the movable plate (7), and the second fixing member (11) located at the top is fixedly connected to the inner wall of the protective box (1).

9. The chromatographic type on-line monitoring device for dissolved gas in transformer oil according to claim 7, characterized in that: The second fixing member (11) located at the bottom is fixedly connected to a fixing frame (6) at the bottom, a placement opening is provided in the inner cavity of the fixing frame (6), a third fixing member (15) is installed in the inner cavity of the placement opening, a first fixing member (10) is installed at the top of the fixing frame (6), a first rotating shaft is inserted into the rear side of the first fixing member (10), a swinging frame (12) is fixedly sleeved on the outer side of the first rotating shaft near the center, a fan-shaped toothed plate (13) is fixedly connected to the rear end of the first rotating shaft, a fixing motor (5) is fixedly connected to the front side of the third fixing member (15), a power output shaft of the fixing motor (5) passes through the third fixing member (15) and is fixedly connected to a rotating plate (16), an annular opening is provided on the swinging frame (12), a movable sliding rod (45) is fixedly connected to the rear side of the rotating plate (16) near the bottom, the movable sliding rod (45) is in contact with the annular opening, and the rotating plate (16) and the swinging frame (12) are located between the second fixing member (11) and the third fixing member (15).

10. The chromatographic type on-line monitoring device for dissolved gas in transformer oil according to claim 9, characterized in that: A second rotating shaft is provided through the inner cavity of the second fixing member (11), a vibration gear (14) is fixedly connected to the rear end of the second rotating shaft, the vibration gear (14) and the sector-shaped toothed plate (13) are meshed with each other, and the front end of the second rotating shaft is fixedly connected to a movable plate (7) located below.

Images