A sampling device for transformer oil sample detection

Abstract

The present invention belongs to the technical field of transformer maintenance, and particularly relates to a sampling device for transformer oil sample detection, comprising a connecting pipe, an oil extraction pipe, a sealing box, a collecting box, a plugging piece and a lifting piece, a through hole is opened at the bottom of the sealing box, the collecting box is arranged in the through hole, and the top of the collecting box extends to the inside of the sealing box, an oil drain hole is opened on the collecting box, one end of the oil extraction pipe is connected to the oil outlet of the transformer, and the other end of the oil extraction pipe passes through the top plate of the sealing box and extends downward along the sealing box until the bottom end of the oil extraction pipe extends to the bottom of the collecting box. The present invention can achieve the purpose of transformer oil sampling through the mutual cooperation of the connecting pipe, the oil extraction pipe, the sealing box and the collecting box, and the function of the plugging piece can prevent the transformer oil from contacting with the air during the sampling process, thereby causing impurities in the air to be mixed in the sampled transformer oil, which greatly ensures the accuracy of the extracted transformer oil detection data.

Description

Technical Field

[0001] The invention belongs to the technical field of transformer maintenance, and in particular relates to a sampling device for transformer oil sample detection. Background Art

[0002] Transformer oil plays a vital role in the power system. It is not only used for insulation and cooling, but also plays a key role in the normal operation of the equipment. However, after long-term use, transformer oil will age due to factors such as heat and moisture, lose its original performance, and affect the normal operation of the equipment. In order to ensure the normal operation of the transformer and extend the service life of the equipment, it is necessary to regularly sample and test the transformer oil.

[0003] When the existing transformer sampling device samples the transformer oil, the oil is extracted from the transformer through the sampling device and then put into the sealing device again for sealing transfer detection. During the sampling process, the air remaining in the sampling device and the oil in the sampling device are input into the sealing device. The oil will come into contact with the air and mix with impurities in the air, resulting in errors in the detection data of the sampled transformer oil. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a sampling device for transformer oil sample detection. The device can achieve the purpose of transformer oil sampling through the cooperation of a connecting pipe, an oil sampling pipe, a sealing box and a collecting box, and can prevent the transformer oil from contacting with the air during the sampling process, thereby causing impurities in the air to be mixed in the sampled transformer oil, thereby greatly ensuring the accuracy of the extracted transformer oil detection data.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A sampling device for transformer oil sample detection includes a connecting pipe, an oil extraction pipe, a sealing box, a collecting box, a plugging piece and a lifting piece. A through hole is opened at the bottom of the sealing box, the collecting box is arranged in the through hole, and the top of the collecting box extends to the inside of the sealing box. An oil drain hole is opened on the collecting box, one end of the connecting pipe is connected to the sealing box, and the other end of the connecting pipe is connected to an extractor, one end of the oil extraction pipe is connected to the oil outlet pipe on the transformer, and the other end of the oil extraction pipe passes through the top plate of the sealing box and extends downward along the sealing box until the bottom end of the oil extraction pipe extends to the bottom of the collecting box, the lifting piece is arranged on one side of the sealing box, and the lifting piece cooperates with the collecting box, the plugging piece is installed on the collecting box, and the plugging piece cooperates with the oil drain hole.

[0007] Preferably, an observation window is provided on one side of the sealing box, and a sealing strip for sealing the connection between the collecting box and the sealing box is provided at the edge of the through hole at the bottom of the sealing box. The setting of the observation window is convenient for the staff to observe the height of the oil inside the collecting box, and the setting of the sealing strip is convenient for sealing the sealing box to prevent air from entering the sealing box and contacting the sampled oil, which would cause errors in the detection data of the sampled transformer oil.

[0008] Preferably, the lifting member includes a vertical plate and a lifting plate, the vertical plate is fixedly mounted on one side of the bottom of the sealing box, a mounting groove is opened at the bottom of the vertical plate, the lifting plate is arranged in the mounting groove at the bottom of the vertical plate, and the lifting plate is slidably connected to the mounting groove, and an avoidance groove is also opened in the middle of the lifting plate, the avoidance groove cooperates with the collecting box, the vertical plate and the lifting plate are arranged to lift the collecting box, to ensure the stability of the collecting box during the sampling and collection process, to ensure that the device is always in a stable state when sampling the transformer oil, to prevent the extracted transformer oil from contacting with the air due to the tilting or sliding of the collecting box, thereby affecting the detection result of the sampled transformer oil.

[0009] Preferably, a protrusion is installed on the inner wall of the mounting groove, and strip grooves are opened on both sides of the lifting plate. A guide rod and a first spring are arranged inside the strip groove. The two ends of the guide rod are respectively fixedly installed in the strip groove, and the protrusion is slidably installed on the guide rod. The first spring is sleeved on the guide rod. The setting of the protrusion, the strip groove and the guide rod can guide the lifting plate to prevent the lifting plate from shaking during the sliding process and affecting the normal operation of the lifting plate. The setting of the first spring can ensure that the lifting plate is always at the bottom of the collection box during the operation, ensuring the safety and stability of the collection during the sampling process.

[0010] Preferably, a limit member is also fixedly installed on one side of the vertical plate, and the limit member includes a fixing sleeve and a limit pin. The fixing sleeve is fixedly installed on one side of the vertical plate, and the limit pin is slidably installed on the fixing sleeve. Limit holes are opened on both sides of the center line of the bottom of the avoidance groove on the lifting plate, and the limit holes cooperate with the limit pins. A fixing groove is opened at the end of the lifting plate, and a handle is fixedly installed in the fixing groove. The setting of the limit member facilitates limiting the lifting plate to prevent interference with the lifting plate when taking and installing the collection box. The setting of the handle facilitates the staff to pull the lifting plate, thereby facilitating the collection box to be taken out of the sealed box, thereby improving the sampling efficiency and sampling quality of the transformer oil.

[0011] Preferably, the sealing member includes a rotating arm, a sliding block, a sealing mechanism, a pulling rod and a pulling mechanism. The rotating arms are symmetrically arranged on both sides of the collecting box, and are rotatably mounted on the side walls of the collecting box at a position slightly lower than the middle of the rotating arms. A sliding groove is provided at one end slightly upper than the middle of the rotating arm, and the sliding block is slidably connected to the sliding groove, and the sliding block is rotatably mounted on the sealing mechanism. The sealing mechanism cooperates with the oil drain hole, and the two ends of the pulling rod are respectively rotatably mounted on the rotating arm and the pulling mechanism, and the pulling mechanism is fixedly mounted on the collecting box. The setting of the sliding groove and the sliding block ensures the normal operation of the sealing mechanism, and can ensure that the sealing mechanism can move up and down along the collecting box normally, and makes the sealing plate close to the side wall of the collecting box, thereby ensuring that the sealing member normally blocks the oil drain hole, preventing the removed transformer oil from contacting with the air and affecting the later detection results of the transformer oil.

[0012] Preferably, the sealing mechanism includes a sealing plate and a sliding plate, the sliding plates are symmetrically arranged at both ends of the sealing plate, the sliding plates are connected to the sealing plates, and there is a gap between the side walls of the sealing plate and the sliding plates, and an inclined surface is arranged on one end of the sealing plate close to the collecting box, and the setting of the inclined surface facilitates the insertion of the sealing plate into the oil drain hole, thereby preventing the sampled transformer oil from being discharged from the oil drain hole when the collecting box is drawn out, causing unnecessary waste, and also preventing the removed transformer oil from contacting with the air, thereby ensuring the accuracy of the detection results of the sampled transformer oil.

[0013] Preferably, the pulling mechanism includes a mounting plate, a strip hole is opened on the mounting plate, a fixing rod, a lifting block, a fixing shaft and a second spring are arranged in the strip hole, the mounting plate is fixedly mounted on the side plate of the collecting box, two ends of the fixing rod are fixedly mounted on the inner wall of the strip hole, the lifting block is arranged in the strip hole, and the lifting block is slidably mounted on the fixing rod, the fixing shaft is fixedly mounted on the lifting block, and the end of the pulling rod is rotatably mounted on the fixing shaft, the second spring is sleeved on the fixing rod, and the two ends of the second spring are respectively mounted on the bottom of the lifting block and the bottom inner wall of the strip hole, the second spring can always provide pulling force for the lifting block, so that the lifting block can play the purpose of pulling the fixed shaft, the movement of the fixed shaft can drive the movement of the pulling rod, the movement of the pulling rod will drive the rotating arm to rotate, the rotation of the rotating arm will provide stress for the sliding plate to move toward the collecting box, the movement of the sliding plate toward the collecting box will drive the blocking plate to move toward the collecting box, thereby ensuring that the blocking plate is inserted into the oil drain hole at the moment the oil drain hole on the collecting box is pulled out from the bottom of the sealing box, thereby greatly ensuring the quality of sampling.

[0014] Preferably, a locking piece is also installed on the fixed shaft, and the locking piece includes a rotating sleeve, a connecting rod, a fixing plate, a side plate and a hand-screw bolt installed on the side plate. A fixing block is installed on the bottom of the collection box, and a groove is opened on the fixing block, and the fixing block slidably cooperates with the avoidance groove. The rotating sleeve is symmetrically arranged on both sides of the lifting block, and the rotating sleeve is rotatably installed on the fixing shaft, and two ends of the connecting rod are respectively fixedly installed on the rotating sleeve and the fixing plate, and the side plate is fixedly installed on the center line of one side of the fixing plate, and the hand-screw bolt is threadedly installed on the side plate, and the hand-screw bolt cooperates with the groove. The setting of the hand-screw bolt can serve the purpose of pulling the fixed shaft, so that the fixed shaft always has a stress for downward movement, and the downward movement of the fixed shaft will drive the lifting block to move downward, and the downward movement of the lifting block will pull one end of the pulling rod to move downward, and the downward movement of one end of the pulling rod will pull the end of the rotating arm to rotate around the hinge of the rotating arm and the collection box, thereby fixing the sealing plate in the oil drain hole, thereby achieving the purpose of sealing the oil drain hole.

[0015] Preferably, a limit groove is opened on the inner wall of the collecting box, the limit groove is connected with the oil drain hole, and a sealing gasket is also arranged in the limit groove. The limit groove and the sealing gasket cooperate with the sealing plate. The setting of the limit groove and the sealing gasket can seal the connection between the sealing plate and the collecting box, prevent the oil sample taken out of the collecting box from contacting with the air, and ensure the accuracy of the test results of the sampled transformer oil.

[0016] The beneficial effects of the present invention are:

[0017] The device can achieve the purpose of transformer oil sampling through the cooperation of the connecting pipe, the oil extraction pipe, the sealing box and the collecting box. The sealing piece can prevent the transformer oil from contacting the air during the sampling process, thereby causing impurities in the air to mix with the sampled transformer oil, thereby greatly ensuring the accuracy of the extracted transformer oil detection data.

[0018] The setting of the observation window of the device is convenient for the staff to observe the height of the oil inside the collection box, and the setting of the sealing strip is convenient for sealing the sealing box to prevent air from entering the sealing box and contacting the sampled oil, resulting in errors in the detection data of the sampled transformer oil.

[0019] The vertical plate and the lifting plate of the device are used to lift the collection box to ensure the stability of the collection box during the sampling and collection process, and to ensure that the device is always in a stable state when sampling the transformer oil, thereby preventing the extracted transformer oil from contacting with the air due to the tilting or sliding of the collection box, thereby affecting the detection results of the sampled transformer oil.

[0020] The setting of the protrusion, strip groove and guide rod of the device can guide the lifting plate and prevent the lifting plate from shaking during the sliding process, which affects the normal operation of the lifting plate. The setting of the first spring can ensure that the lifting plate is always at the bottom of the collection box during the operation, ensuring the safety and stability of the collection during the sampling process.

[0021] The setting of the limiter of the device is convenient for limiting the lifting plate to prevent interference with the lifting plate when taking and installing the collection box. The setting of the handle is convenient for the staff to pull the lifting plate, thereby facilitating the collection box to be taken out of the sealed box, thereby improving the sampling efficiency and sampling quality of the transformer oil.

[0022] The setting of the sliding groove and the sliding block of the device ensures the normal operation of the sealing mechanism, can ensure that the sealing mechanism can move up and down along the collection box normally, and makes the sealing plate close to the side wall of the collection box, thereby ensuring that the sealing member normally blocks the oil drain hole, preventing the taken out transformer oil from contacting with the air and affecting the later detection results of the transformer oil.

[0023] The inclined surface of the device is arranged to facilitate the insertion of the sealing plate into the oil drain hole, thereby preventing the sampled transformer oil from being discharged from the oil drain hole when the collection box is drawn out, causing unnecessary waste. It can also prevent the taken transformer oil from contacting the air, thereby ensuring the accuracy of the test results of the sampled transformer oil.

[0024] The second spring of the device can always provide pulling force for the lifting block, so that the lifting block can pull the fixed shaft. The movement of the fixed shaft can drive the pulling rod to move. The movement of the pulling rod will drive the rotating arm to rotate. The rotation of the rotating arm will provide stress for the sliding plate to move toward the collecting box. The movement of the sliding plate toward the collecting box will drive the sealing plate to move toward the collecting box, thereby ensuring that the sealing plate is inserted into the oil drain hole at the moment the oil drain hole on the collecting box is pulled out from the bottom of the sealing box, which greatly ensures the quality of sampling.

[0025] The setting of the hand-screwed bolt of the device can pull the fixed shaft so that the fixed shaft always has the stress of moving downward. The downward movement of the fixed shaft will drive the lifting block to move downward. The downward movement of the lifting block will pull one end of the pulling rod to move downward. The downward movement of one end of the pulling rod will pull the end of the rotating arm to rotate around the hinge between the rotating arm and the collecting box, thereby fixing the sealing plate in the oil drain hole and achieving the purpose of sealing the oil drain hole.

[0026] The setting of the limit groove and the sealing gasket of the device can seal the connection between the sealing plate and the collection box, prevent the oil sample taken out of the collection box from contacting with the air, and ensure the accuracy of the test results of the sampled transformer oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Attached Figure 1 The structure of the present invention is schematically shown in FIG. Figure 1 .

[0028] Attached Figure 2 The structure of the present invention is schematically shown in FIG. Figure 2 .

[0029] Attached Figure 3 It is a cross-sectional view of the present invention.

[0030] Attached Figure 4 It is a schematic diagram of the installation structure of the blocking member in the present invention.

[0031] Attached Figure 5 It is a schematic diagram of the installation structure of the pulling mechanism in the present invention.

[0032] Attached Figure 6 It is a schematic diagram of the structure of the through hole in the present invention.

[0033] Attached Figure 7 The present invention Figure 3 Enlarged view of point A in the middle.

[0034] Attached Figure 8 It is a structural schematic diagram of the blocking mechanism in the present invention.

[0035] Attached Fig. 9 It is a structural schematic diagram of the lifting member in the present invention.

[0036] Attached Fig.10 It is a schematic diagram of the coordination between the limiting member and the lifting plate in the present invention.

[0037] Attached Fig.11 It is a structural schematic diagram of the neutral plate of the present invention.

[0038] Attached Fig.12 It is a structural schematic diagram of the lifting plate in the present invention.

[0039] Attached Fig.13 The present invention Fig.11 Enlarged view of point C in the middle.

[0040] Attached Fig.14 The present invention Figure 4 Enlarged view of point B in the middle.

[0041] In the figure:

[0042] 1. Collection box; 101. Oil drain hole; 102. Limiting groove; 103. Groove; 104. Fixing block;

[0043] 2. Lifting member; 201. Vertical plate; 202. Lifting plate; 203. Limiting member; 204. Protrusion; 205. Mounting groove; 206. Guide rod; 207. First spring; 208. Limiting hole; 209. Fixing groove; 2010. Handle; 2011. Strip groove; 2012. Avoiding groove; 2013. Limiting pin; 2014. Fixing sleeve;

[0044] 3. Sealed box; 301, through hole;

[0045] 4. Connecting pipe;

[0046] 5. Observation window;

[0047] 6. Take the oil pipe;

[0048] 7. Blocking member; 701. Rotating arm; 702. Sliding block; 703. Pulling rod; 704. Pulling mechanism; 705. Blocking mechanism; 706. Sliding groove; 707. Fixed shaft; 708. Lifting block; 709. Strip hole; 7010. Second spring; 7011. Fixed rod; 7012. Mounting plate; 7013. Blocking plate; 7014. Sliding plate; 7015. Inclined surface;

[0049] 8. Sealing strip;

[0050] 9. Locking piece; 901. Rotating sleeve; 902. Connecting rod; 903. Side plate; 904. Hand screw bolt; 905. Fixed plate. DETAILED DESCRIPTION

[0051] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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.

[0052] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0053] like Figure 1 , Figure 2 , Figure 3As shown, a sampling device for transformer oil sample detection includes a connecting pipe 4, an oil extraction pipe 6, a sealing box 3, a collecting box 1, a blocking member 7 and a lifting member 2. A through hole 301 is opened at the bottom of the sealing box 3. Figure 6 As shown, the collecting box 1 is arranged in the through hole 301, and the top of the collecting box 1 extends to the interior of the sealed box 3, an oil drain hole 101 is opened on the collecting box 1, one end of the connecting pipe 4 is connected to the sealed box 3, and the other end of the connecting pipe 4 is connected to the extractor, one end of the oil extraction pipe 6 is connected to the oil outlet pipe on the transformer, and the other end of the oil extraction pipe 6 passes through the top plate of the sealed box 3 and extends downward along the sealed box 3 until the bottom end of the oil extraction pipe 6 extends to the bottom of the collecting box 1, the lifting member 2 is arranged on one side of the sealed box 3, and the lifting member 2 cooperates with the collecting box 1, and the blocking member 7 is installed on the collecting box 1, and the blocking member 7 cooperates with the oil drain hole 101.

[0054] As an optimization solution of this embodiment, Figure 1 As shown, an observation window 5 is provided on one side of the sealing box 3 , and a sealing strip 8 for sealing the connection between the collecting box 1 and the sealing box 3 is provided at the edge of the through hole 301 at the bottom of the sealing box 3 .

[0055] The setting of the observation window 5 is convenient for the staff to observe the height of the oil inside the collection box 1, and the setting of the sealing strip 8 is convenient for sealing the sealing box 3 to prevent air from entering the sealing box 3 and contacting the sampled oil, resulting in errors in the detection data of the sampled transformer oil.

[0056] As an optimization solution of this embodiment, Fig. 9 As shown, the lifting member 2 includes a vertical plate 201 and a lifting plate 202. The vertical plate 201 is fixedly installed on one side of the bottom of the sealing box 3. A mounting groove 205 is opened at the bottom of the vertical plate 201. The lifting plate 202 is arranged in the mounting groove 205 at the bottom of the vertical plate 201, and the lifting plate 202 is slidably connected to the mounting groove 205. An avoidance groove 2012 is also opened in the middle of the lifting plate 202, and the avoidance groove 2012 cooperates with the collection box 1.

[0057] The vertical plate 201 and the lifting plate 202 are used to lift the collection box 1 to ensure the stability of the collection box 1 during the sampling and collection process, and to ensure that the device is always in a stable state when sampling the transformer oil, thereby preventing the extracted transformer oil from contacting with the air due to the tilting or sliding of the collection box 1, thereby affecting the detection results of the sampled transformer oil.

[0058] As an optimization solution of this embodiment, Fig.11 As shown, a protrusion 204 is installed on the inner wall of the installation groove 205. Fig.12As shown, strip grooves 2011 are opened on both sides of the lifting plate 202, and guide rods 206 and first springs 207 are arranged inside the strip grooves 2011. The two ends of the guide rods 206 are respectively fixedly installed in the strip grooves 2011, the protrusions 204 are slidably installed on the guide rods 206, and the first springs 207 are sleeved on the guide rods 206.

[0059] The setting of the protrusion 204, the strip groove 2011 and the guide rod 206 can guide the lifting plate 202 to prevent the lifting plate 202 from shaking during the sliding process and affecting the normal operation of the lifting plate 202. The setting of the first spring 207 can ensure that the lifting plate 202 is always at the bottom of the collection box 1 during the operation, ensuring the safety and stability of the collection during the sampling process.

[0060] As an optimization solution of this embodiment, Fig.13 As shown, a limiting member 203 is fixedly installed on one side of the vertical plate 201, and the limiting member 203 includes a fixing sleeve 2014 and a limiting pin 2013. The fixing sleeve 2014 is fixedly installed on one side of the vertical plate 201, and the limiting pin 2013 is slidably installed on the fixing sleeve 2014. Fig.10 As shown, limiting holes 208 are opened on both sides of the center line of the bottom of the avoidance groove 2012 on the lifting plate 202, and the limiting holes 208 cooperate with the limiting pins 2013. A fixing groove 209 is opened at the end of the lifting plate 202, and a handle 2010 is fixedly installed in the fixing groove 209.

[0061] The setting of the limit piece 203 facilitates the limiting of the lifting plate 202 to prevent interference with the lifting plate 202 when taking and installing the collection box 1. The setting of the handle 2010 facilitates the staff to pull the lifting plate 202, thereby facilitating the collection box 1 to be taken out of the sealing box 3, thereby improving the sampling efficiency and sampling quality of the transformer oil.

[0062] In order to increase the service life of the handle 2010 and reduce the use cost, the handle 2010 may be coated with a wear-resistant layer.

[0063] As an optimization solution of this embodiment, in order to be able to block the oil drain hole 101 on the collection box 1 to ensure the safety of the transformer oil taken out, Figure 4As shown, the sealing member 7 includes a rotating arm 701, a sliding block 702, a sealing mechanism 705, a pulling rod 703 and a pulling mechanism 704. The rotating arm 701 is symmetrically arranged on both sides of the collection box 1. The rotating arm 701 is rotatably installed on the side wall of the collection box 1 at a position slightly lower than the middle part. A sliding groove 706 is opened at one end slightly upper than the middle part of the rotating arm 701. The sliding block 702 is slidingly connected to the sliding groove 706, and the sliding block 702 is rotatably installed on the sealing mechanism 705. The sealing mechanism 705 cooperates with the oil drain hole 101. The two ends of the pulling rod 703 are rotatably installed on the rotating arm 701 and the pulling mechanism 704 respectively. The pulling mechanism 704 is fixedly installed on the collection box 1.

[0064] The setting of the sliding groove 706 and the sliding block 702 ensures the normal operation of the sealing mechanism 705, and can ensure that the sealing mechanism 705 can move up and down along the collection box 1 normally, and make the sealing plate 7013 close to the side wall of the collection box 1, ensuring that the sealing member 7 normally blocks the oil drain hole 101, preventing the removed transformer oil from contacting with the air and affecting the later detection results of the transformer oil.

[0065] As an optimization solution of this embodiment, in order to block the oil drain hole 101 and ensure the sampling efficiency and sampling quality of the transformer oil, Figure 8 As shown, the sealing mechanism 705 includes a sealing plate 7013 and a sliding plate 7014. The sliding plate 7014 is symmetrically arranged at both ends of the sealing plate 7013. The sliding plate 7014 is connected to the sealing plate 7013, and there is a gap between the side walls of the sealing plate 7013 and the sliding plate 7014, so as to facilitate the sliding cooperation between the sliding plate 7014 and the side wall of the collection box 1, and to prevent interference between the sliding plate 7014 and the collection box 1 when the sealing plate 7013 cooperates with the oil drain hole 101. An inclined surface 7015 is arranged on the end of the sealing plate 7013 close to the collection box 1.

[0066] The setting of the inclined surface 7015 facilitates the insertion of the sealing plate 7013 into the oil drain hole 101, preventing the sampled transformer oil from being discharged from the oil drain hole 101 when the collection box 1 is drawn out, causing unnecessary waste. It can also prevent the taken out transformer oil from contacting with the air, thereby ensuring the accuracy of the sampled transformer oil detection results.

[0067] As an optimization solution of this embodiment, Figure 5As shown, the pulling mechanism 704 includes a mounting plate 7012, a strip hole 709 is opened on the mounting plate 7012, a fixing rod 7011, a lifting block 708, a fixing shaft 707 and a second spring 7010 are arranged in the strip hole 709, the mounting plate 7012 is fixedly mounted on the side plate 903 of the collection box 1, both ends of the fixing rod 7011 are fixedly mounted on the inner wall of the strip hole 709, the lifting block 708 is arranged in the strip hole 709, and the lifting block 708 is slidably mounted on the fixing rod 7011, the fixing shaft 707 is fixedly mounted on the lifting block 708, and the end of the pulling rod 703 is rotatably mounted on the fixing shaft 707, the second spring 7010 is sleeved on the fixing rod 7011, and the two ends of the second spring 7010 are respectively mounted on the bottom of the lifting block 708 and the bottom inner wall of the strip hole 709.

[0068] The second spring 7010 can always provide pulling force for the lifting block 708, so that the lifting block 708 can pull the fixed shaft 707. The movement of the fixed shaft 707 can drive the pulling rod 703 to move. The movement of the pulling rod 703 will drive the rotating arm 701 to rotate. The rotation of the rotating arm 701 will provide stress for the sliding plate 7014 to move toward the collecting box 1. The movement of the sliding plate 7014 toward the collecting box 1 will drive the sealing plate 7013 to move toward the collecting box 1, thereby ensuring that the sealing plate 7013 is inserted into the oil drain hole 101 at the moment the oil drain hole 101 on the collecting box 1 is pulled out from the bottom of the sealing box 3, thereby greatly ensuring the quality of sampling.

[0069] As an optimization solution of this embodiment, Fig.14 As shown, a locking member 9 is also installed on the fixed shaft 707, and the locking member 9 includes a rotating sleeve 901, a connecting rod 902, a fixing plate 905, a side plate 903 and a hand screw bolt 904 installed on the side plate 903. A fixing block 104 is installed at the bottom of the collection box 1, and a groove 103 is opened on the fixing block 104. The fixing block 104 is slidably matched with the avoidance groove 2012. The rotating sleeve 901 is symmetrically arranged on both sides of the lifting block 708, and the rotating sleeve 901 is rotatably installed on the fixed shaft 707. The two ends of the connecting rod 902 are respectively fixedly installed on the rotating sleeve 901 and the fixing plate 905. 05, the side plate 903 is fixedly installed on the center line of one side of the fixed plate 905, the hand-screw bolt 904 is threadedly installed on the side plate 903, and the hand-screw bolt 904 cooperates with the groove 103, and the groove 103 can achieve the purpose of limiting the hand-screw bolt 904, preventing the hand-screw bolt 904 from falling off from the groove 103 during operation, thereby ensuring the normal operation of the hand-screw bolt 904, and the hand-screw bolt 904 cooperates with the second spring 7010, the lifting block 708 and the fixed shaft 707 to fix the pulling rod 703, thereby ensuring the stability of the pulling rod 703 during operation.

[0070] The setting of the hand-screw bolt 904 can pull the fixed shaft 707 so that the fixed shaft 707 always has the stress of moving downward. The downward movement of the fixed shaft 707 will drive the lifting block 708 to move downward. The downward movement of the lifting block 708 will pull one end of the pulling rod 703 to move downward. The downward movement of one end of the pulling rod 703 will pull the end of the rotating arm 701 to rotate around the hinge between the rotating arm 701 and the collecting box 1, thereby fixing the sealing plate 7013 in the oil drain hole 101, thereby achieving the purpose of sealing the oil drain hole 101.

[0071] As an optimization solution of this embodiment, Figure 7 As shown, a limiting groove 102 is opened on the inner wall of the collecting box 1, and the limiting groove 102 is connected to the oil drain hole 101. A limiting groove 102 is opened on the side wall of the collecting box 1, and a sealing gasket (not shown in the figure) is also arranged in the limiting groove 102. The limiting groove 102 and the sealing gasket are matched with the sealing plate 7013.

[0072] The setting of the limiting groove 102 and the sealing gasket can seal the connection between the sealing plate 7013 and the collecting box 1, preventing the oil sample taken out of the collecting box 1 from contacting with the air, thereby ensuring the accuracy of the test results of the sampled transformer oil.

[0073] The working process is as follows:

[0074] S1. Connect the oil extraction pipe 6 to the oil outlet or insert it into the transformer oil tank, connect the connecting pipe 4 to the extractor, and insert the collecting box 1 into the inside of the sealing box 3 from the through hole 301 at the bottom of the sealing box 3, so that the bottom of the oil extraction pipe 6 contacts the bottom of the collecting box 1;

[0075] S2, pulling the limit pin 2013 so that the lifting plate 202 moves to the bottom of the collection box 1 along the protrusion 204 under the action of the first spring 207, and lifts the collection box 1;

[0076] S3, the staff turns the valve at the transformer oil outlet, and extracts the air in the sealed box 3 through the extractor. During the extraction process, the transformer oil is input from the oil extraction pipe 6 to the bottom of the collection box 1, and the transformer oil is continuously extracted. The staff observes the whole process through the observation window 5;

[0077] S4, when the transformer oil is input into the oil drain hole 101 and discharged from the oil drain hole 101, pull the limit pin 2013 upward so that the limit pin 2013 is extracted from one of the limit holes 208, pull the handle 2010 to pull the lifting plate 202 out from the bottom of the lifting plate 202, so that the limit pin 2013 cooperates with the other limit hole 208, and pull the collection box 1 downward so that the oil drain hole 101 on the collection box 1 cooperates with the bottom of the collection box 1 to achieve the purpose of blocking the oil drain hole 101;

[0078] S5. Pull the collecting box 1 downward while the extractor continues to extract the transformer oil until the top of the transformer oil is above the oil drain hole 101. Then, continue to pull the collecting box 1 downward. During the pulling process, the oil drain hole 101 is pulled out from the bottom of the sealing box 3. At the moment when the oil drain hole 101 is pulled out from the bottom of the sealing box 3, the second spring 7010, the rotating arm 701 and the pulling rod 703 drive the blocking plate 7013 to block the oil drain hole 101 to prevent the transformer oil at the oil drain hole 101 from contacting the air. Continue to pull the collecting box 1 downward until the blocking plate 7013 is completely inserted into the oil drain hole 101 and the limiting groove 102.

[0079] S6. Rotate the fixed plate 905 to drive the side plate 903 to rotate to the bottom of the collecting box 1, then rotate the end of the hand-screw bolt 904 to the groove 103 at the bottom of the collecting box 1, and continue to rotate the hand-screw bolt 904 to drive the side plate 903 to move downward. The side plate 903 moves downward and drives the fixed plate 905 to move downward. The downward movement of the fixed plate 905 will drive the rotating sleeve 901 to move downward. The downward movement of the rotating sleeve 901 will drive the fixed shaft 707 and the lifting block 708 to move downward. The downward movement of the fixed shaft 707 and the lifting block 708 will pull the pulling rod 703 to move downward. The downward movement of the pulling rod 703 will pull one end of the rotating arm 701 to move downward. The rotation of the rotating arm 701 will provide power for the sliding plate 7014 and the sealing plate 7013 to be fixed in the oil drain hole 101, which greatly ensures the sealing efficiency and sealing quality of the sealing plate 7013.

[0080] During the entire transformer oil sampling process, only the uppermost layer of transformer oil can come into contact with the air. When the uppermost layer of transformer oil rises above the oil drain hole 101, the sealing plate 7013 is inserted into the oil drain hole 101 and the limit groove 102, so that the transformer oil in contact with the air can be directly separated from the transformer oil being sampled, thereby ensuring the sampling efficiency and sampling quality of the transformer oil, and ultimately ensuring the accuracy of the sampled transformer oil detection results.

[0081] The above contents are merely examples and explanations of the structure of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the scope defined by the structure of the present invention, they shall all fall within the protection scope of the present invention.

Claims

1. A sampling device for transformer oil sample detection, comprising a connecting pipe, an oil extraction pipe, a sealing box, a collecting box, a blocking piece and a lifting piece, characterized in that: A through hole is opened at the bottom of the sealed box, the collecting box is arranged in the through hole, and the top of the collecting box extends to the inside of the sealed box, an oil drain hole is opened on the collecting box, one end of the connecting pipe is connected to the sealed box, the other end of the connecting pipe is connected to the extractor, one end of the oil extraction pipe is connected to the oil outlet of the transformer, the other end of the oil extraction pipe passes through the top plate of the sealed box and extends downward along the sealed box until the bottom end of the oil extraction pipe extends to the bottom of the collecting box, the lifting piece is arranged on one side of the sealed box, and the lifting piece cooperates with the collecting box, the blocking piece is installed on the collecting box, and the blocking piece cooperates with the oil drain hole; The blocking member includes a rotating arm, a sliding block, a blocking mechanism, a pulling rod and a pulling mechanism. The rotating arm is symmetrically arranged on both sides of the collection box. The rotating arm is rotatably mounted on the side wall of the collection box at a position slightly lower than the middle part. A sliding groove is provided at one end slightly higher than the middle part of the rotating arm. The sliding block is slidably connected to the sliding groove, and the sliding block is rotatably mounted on the blocking mechanism. The blocking mechanism cooperates with the oil drain hole. The two ends of the pulling rod are rotatably mounted on the rotating arm and the pulling mechanism respectively. The pulling mechanism is fixedly mounted on the collection box. The blocking mechanism includes a blocking plate and a sliding plate, wherein the sliding plates are symmetrically arranged at both ends of the blocking plate, the sliding plate is connected to the blocking plate, and there is a gap between the blocking plate and the side wall of the sliding plate, and an inclined surface is arranged on one end of the blocking plate close to the collection box; The pulling mechanism comprises a mounting plate, a strip hole is formed on the mounting plate, a fixing rod, a lifting block, a fixing shaft and a second spring are arranged in the strip hole, the mounting plate is fixedly mounted on the side plate of the collection box, two ends of the fixing rod are fixedly mounted on the inner wall of the strip hole, the lifting block is arranged in the strip hole, and the lifting block is slidably mounted on the fixing rod, the fixing shaft is fixedly mounted on the lifting block, and the end of the pulling rod is rotatably mounted on the fixing shaft, the second spring is sleeved on the fixing rod, and two ends of the second spring are respectively mounted on the bottom of the lifting block and the bottom inner wall of the strip hole; The lifting member includes a vertical plate and a lifting plate. The vertical plate is fixedly mounted on one side of the bottom of the sealed box. A mounting groove is provided at the bottom of the vertical plate. The lifting plate is arranged in the mounting groove at the bottom of the vertical plate. The lifting plate is slidably connected to the mounting groove. An avoidance groove is also provided in the middle of the lifting plate. The avoidance groove matches the collection box. A convex block is installed on the inner wall of the installation groove, strip grooves are opened on both sides of the lifting plate, a guide rod and a first spring are arranged inside the strip groove, both ends of the guide rod are respectively fixedly installed in the strip groove, the convex block is slidably installed on the guide rod, and the first spring is sleeved on the guide rod; A limiting member is also fixedly installed on one side of the vertical plate, and the limiting member includes a fixing sleeve and a limiting pin. The fixing sleeve is fixedly installed on one side of the vertical plate, and the limiting pin is slidably installed on the fixing sleeve. Limiting holes are opened on both sides of the center line of the bottom of the avoidance groove on the lifting plate, and the limiting holes cooperate with the limiting pin. A fixing groove is opened at the end of the lifting plate, and a handle is fixedly installed in the fixing groove.

2. A sampling device for transformer oil sample detection according to claim 1, characterized in that: An observation window is provided on one side of the sealing box, and a sealing strip for sealing the connection between the collecting box and the sealing box is provided at the edge of the through hole at the bottom of the sealing box.

3. A sampling device for transformer oil sample detection according to claim 1, characterized in that: A locking piece is also installed on the fixed shaft, and the locking piece includes a rotating sleeve, a connecting rod, a fixed plate, a side plate and a hand-screw bolt installed on the side plate. A fixed block is installed at the bottom of the collecting box, and a groove is opened on the fixed block. The fixed block and the avoidance groove are slidably matched. The rotating sleeve is symmetrically arranged on both sides of the lifting block, and the rotating sleeve is rotatably installed on the fixed shaft. The two ends of the connecting rod are respectively fixedly installed on the rotating sleeve and the fixed plate. The side plate is fixedly installed on the center line of one side of the fixed plate. The hand-screw bolt is threadedly installed on the side plate, and the hand-screw bolt is matched with the groove.

4. A sampling device for transformer oil sample detection according to claim 1, characterized in that: Limiting grooves are provided on the inner wall of the collecting box, the limiting grooves are connected with the oil drain hole, sealing pads are arranged in the limiting grooves, and the limiting grooves and the sealing pads are matched with the blocking plate.

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