Sampling device for transformer oil detection

Abstract

The utility model belongs to the field of sampling devices, and particularly relates to a sampling device for transformer oil detection, which comprises a sampling tube and a tube cover, threads are arranged around the upper part of the sampling tube, the tube cover is in threaded connection with the sampling tube, a weighting bottom is arranged at the bottom of the sampling tube, and a sampling mechanism is arranged in the sampling tube; the sampling mechanism comprises an automatic sampling unit and an inner wall cleaning unit; the automatic sampling unit comprises a sampling hole, a limiting ring, a fixed base, a supporting strip, a movable block, a first extrusion block, a second extrusion block and a spring, the sampling hole is formed in the middle of the weighting bottom, and the limiting ring is fixedly connected to the periphery of the inner wall of the weighting bottom. After the supporting strip touches the bottom, a movable block is driven to extrude a first extrusion block, the first extrusion block extrudes a spring, a sampling hole is opened, transformer oil can enter a sampling pipe, and the automatic sampling function is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of sampling devices, in particular to a sampling device for transformer oil detection. Background Art

[0002] Transformer oil is a mineral oil obtained through distillation and refining of natural petroleum. It is a mixture of pure, stable, low-viscosity, good insulation and cooling liquid natural hydrocarbons obtained by acid-base refining of lubricating oil fractions in petroleum. It is commonly known as square shed oil, a light yellow transparent liquid. When testing transformer oil, a sampling device is required for sampling.

[0003] A Chinese patent with publication number CN216899780U discloses a sampling device for transformer oil detection, including a sampling box and a handle, wherein the top surface of the sampling box is fixedly connected to the handle, the bottom surface of the sampling box is provided with a positioning block, a slot is provided in the middle of the positioning block, a through hole is provided at the top of the slot, the top of the through hole extends to the interior of the sampling box, a card block is provided inside the slot, and a sampling tube is provided on the bottom surface of the card block.

[0004] The above-mentioned prior art solutions have the following defects: during the sampling process of transformer oil, some impurities or previous oil samples may remain inside the sampling tube, which may affect the accuracy of the next sampling, and during the transformer oil detection process, it is sometimes necessary to take oil samples from the bottom of the transformer for more accurate analysis, and the increase in the length of the sampling tube may cause operational inconvenience.

[0005] Therefore, we propose a sampling device for transformer oil detection to solve the above problems. Utility Model Content

[0006] The utility model aims to provide a sampling device for transformer oil detection, so as to solve the problem that the inside of a sampling tube cannot be cleaned in the above-mentioned background technology.

[0007] To achieve the above object, the utility model provides the following technical solutions: a sampling device for transformer oil detection, comprising a sampling tube and a tube cover, wherein threads are provided around the top of the sampling tube, the tube cover is threadedly connected to the sampling tube, a weighted bottom is provided at the bottom of the sampling tube, and a sampling mechanism is provided inside the sampling tube;

[0008] The sampling mechanism includes an automatic sampling unit and an inner wall cleaning unit;

[0009] The automatic sampling unit comprises a sampling hole, a limiting ring, a fixed base, a support bar, a movable block, a first extrusion block, a second extrusion block and a spring, wherein the sampling hole is opened in the middle of the weighted bottom, the limiting ring is fixedly connected to the periphery of the inner wall of the weighted bottom, the upper surface of the support bar is fixedly connected to the middle of the lower surface of the movable block, the fixed base is fixedly connected to the periphery of the lower surface of the fixed base, the movable block is movably connected to the middle of the sampling hole, the lower surface of the first extrusion block is fixedly connected to the middle of the upper surface of the movable block, the bottom of the spring is fixedly connected to the lower part of the first extrusion block, and the top of the spring is fixedly connected to the lower surface of the second extrusion block;

[0010] The inner wall cleaning unit includes a motor, a stirring shaft, a connecting rod and a brush. The motor is arranged in the middle of the upper surface of the pipe cover, the output end of the motor passes through the pipe cover and is fixedly connected to the upper surface of the stirring shaft, the middle part of the connecting rod is fixedly connected to the stirring shaft, and the brush is fixedly connected to both sides of the connecting rod.

[0011] Preferably, fixing blocks are fixedly connected to both sides of the upper surface of the tube cover, a connecting strip is rotatably connected to the middle of the fixing block, a handle is fixedly connected to the left side of the connecting strip, and the lower sides of the handle are fixedly connected to the side of the connecting strip away from each other, so that the staff can rotate and remove the tube cover conveniently so that the sampling tube can be opened, and a rope can be tied to the handle so that the sampling tube can enter the bottom of the transformer, which is convenient for oil removal and enhances the practicability of the device.

[0012] Preferably, concrete is arranged inside the weighted bottom. Concrete is a material with high density and heavy weight. By arranging it inside the weighted bottom, the overall weight of the sampling device can be significantly increased, so that the sampling device can sink into the transformer oil more stably, facilitating sampling.

[0013] Preferably, the upper surface of the second extrusion block overlaps the lower surface of the stirring shaft. After the support bar touches the bottom, it drives the movable block to squeeze the first extrusion block. The first extrusion block squeezes the spring to open the sampling hole, so that the transformer oil can enter the sampling tube, realizing the automatic sampling function.

[0014] Preferably, there are two connecting rods, which are respectively arranged at the upper and lower ends of the stirring shaft. Each connecting rod has brushes at both ends. The brushes are placed up and down. When the motor drives the stirring shaft to rotate, the brushes can clean the inner wall of the sampling tube in all directions to ensure that impurities on the inner wall can be completely removed, thereby improving the accuracy of the sampling results.

[0015] Preferably, the diameter of the movable block is smaller than the diameter of the sampling hole, and the height of the movable block is equal to the height of the sampling hole, so that the movable block will not be stuck or blocked when moving in the sampling hole. At the same time, the height of the movable block is equal to the height of the sampling hole, so that when the sampling hole is opened, the transformer oil can smoothly enter the interior of the sampling tube.

[0016] Preferably, the length of the support bar is greater than that of the fixed base, and the length of the support bar is designed so that the movable block has enough space to move when subjected to upward extrusion force, ensuring that the sampling hole can be fully opened. At the same time, the fixed base provides a stable support for the movable block to prevent it from deflecting or shaking during movement.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The sampling device for transformer oil detection adopts automatic sampling. After the support bar touches the bottom, it drives the movable block to squeeze the first squeezing block. The first squeezing block squeezes the spring to open the sampling hole, so that the transformer oil can enter the sampling tube, realizing the automatic sampling function.

[0019] 2. The sampling device for transformer oil detection, by setting a fixed block, a connecting strip and a handle, not only facilitates the staff to rotate and remove the tube cover, so that the sampling tube can be opened, convenient for oil collection and cleaning of internal impurities, but also can be tied with a rope at the handle, so that the sampling device can go deeper into the bottom of the transformer for sampling, thereby enhancing the practicality of the device. The concrete is set inside the weighted bottom, which significantly increases the overall weight of the sampling device, so that the device can sink more stably in the transformer oil, avoids the deviation caused by buoyancy, and ensures the accuracy of sampling.

[0020] 3. The sampling device for transformer oil detection is provided with two stirring rods, and brushes are provided at both ends of each connecting rod. When the motor drives the stirring shaft to rotate, the brushes can clean the inner wall of the sampling tube in all directions, ensuring that the impurities on the inner wall can be completely removed, thereby improving the accuracy of the sampling results. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall front structure of the utility model;

[0022] Figure 2 It is a schematic diagram of the overall expanded structure of the utility model;

[0023] Figure 3 It is a schematic diagram of the internal structure of the utility model;

[0024] Figure 4 This is a schematic diagram of the bottom structure of the utility model;

[0025] Figure 5 It is a partial structural schematic diagram of the utility model.

[0026] In the figure: 1 sampling tube, 101 weighted bottom, 102 sampling hole, 103 limiting ring, 104 thread, 2 tube cover, 301 fixed block, 302 connecting strip, 303 handle, 4 fixed base, 5 support strip, 501 movable block, 502 first extrusion block, 503 second extrusion block, 504 spring, 6 motor, 601 stirring shaft, 602 connecting rod, 603 brush. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-Figure 5 The utility model provides a technical solution: a sampling device for transformer oil detection, comprising a sampling tube 1 and a tube cover 2, wherein a thread 104 is provided around the top of the sampling tube 1, and the tube cover 2 is connected to the thread 104 of the sampling tube 1, and the tube cover 2 is used to close the sampling tube to prevent external impurities from entering the sampling tube and affecting the purity of the oil sample. At the same time, the tube cover 2 is connected to the sampling tube 1 by a thread to ensure the stability and sealing of the connection. Fixed blocks 301 are fixedly connected to both sides of the upper surface of the tube cover 2, a connecting strip 302 is rotatably connected to the middle of the fixed block 301, a handle 303 is fixedly connected to the left side of the connecting strip 302, and the lower sides of the handle 303 are fixedly connected to the side of the connecting strip 302 away from each other, the fixed block 301 provides a connection point, the connecting strip 302 allows the handle 303 to rotate on the fixed block 301, and the handle 303 provides a gripping point during operation. Such a design is convenient for the staff to operate the sampling device, especially when it is necessary to sample deeply inside the transformer, the sampling tube 1 can be conveniently controlled and operated by the handle 303.

[0029] A weighted bottom 101 is provided at the bottom of the sampling tube 1. Concrete is provided inside the weighted bottom 101 to increase the overall weight of the sampling device, so that it can sink into the transformer oil more stably, prevent it from deflecting or floating due to buoyancy during the sampling process, and ensure the accuracy of the sampling. A sampling mechanism is provided inside the sampling tube 1;

[0030] The sampling mechanism includes an automatic sampling unit and an inner wall cleaning unit;

[0031] The automatic sampling unit includes a sampling hole 102, a limiting ring 103, a fixed base 4, a support bar 5, a movable block 501, a first extrusion block 502, a second extrusion block 503 and a spring 504. The sampling hole 102 is opened in the middle of the weighted bottom 101 to provide a channel for the oil sample to enter the sampling tube 1. The limiting ring 103 is fixedly connected to the inner wall of the weighted bottom 101 to ensure that the movable block 501 will not be separated from the sampling hole 102 when moving in the sampling hole 102. The upper surface of the support bar 5 is fixedly connected to the middle of the lower surface of the movable block 501, and the length of the support bar 5 is greater than the length of the fixed base 4. The fixed base 4 is fixedly connected to the lower surface of the fixed base 4 to provide support for the movable block 501 to ensure that it can move stably when under pressure. The movable block 501 is movably connected to the middle of the sampling hole 102, the lower surface of the first extrusion block 502 is fixedly connected to the middle of the upper surface of the movable block 501, the bottom of the spring 504 is fixedly connected to the lower part of the first extrusion block 502, the top of the spring 504 is fixedly connected to the lower surface of the second extrusion block 503, the upper surface of the second extrusion block 503 overlaps the lower surface of the stirring shaft 601, and after the support bar 5 touches the bottom, it drives the movable block 501 to squeeze the first extrusion block 502, and the first extrusion block 502 squeezes the spring 504, so that the sampling hole 102 is opened, and the transformer oil can enter the sampling tube 1, thereby realizing the automatic sampling function.

[0032] The inner wall cleaning unit includes a motor 6, a stirring shaft 601, a connecting rod 602 and a brush 603. The motor 6 is arranged in the middle of the upper surface of the tube cover 2. The motor 6 provides power to drive the stirring shaft. The output end of the rotating motor 6 passes through the tube cover 2 and is fixedly connected to the upper surface of the stirring shaft 601. The middle part of the connecting rod 602 is fixedly connected to the stirring shaft 601. There are two connecting rods 602, which are respectively arranged at the upper and lower ends of the stirring shaft 601. Brushes 603 are arranged at both ends of each connecting rod 602. The brushes 603 are placed up and down. The brushes 603 are fixedly connected to both sides of the connecting rod 602 and are responsible for cleaning the inner wall of the sampling tube 1, removing attached impurities and residues, and ensuring the accuracy of the next sampling. The brushes 603 are placed up and down, which can clean the inner wall of the sampling tube 1 more comprehensively.

[0033] Working principle: When it is necessary to sample transformer oil, the staff first ensures that the tube cover 2 is tightly connected to the sampling tube 1 to ensure the sealing of the sampling tube. Then, the sampling device is placed in the transformer through the handle 303, and the sampling device is stably sunk into the transformer oil by using the weighted bottom 101 and the concrete therein. When the sampling device reaches the predetermined depth, the motor 6 is started. The motor 6 drives the stirring shaft 601 to rotate, and the rotation of the stirring shaft 601 drives the connecting rod 602 and the brush 603 to rotate. The brush 603 cleans the inner wall of the sampling tube 1 during the rotation process to remove attached impurities and residues. At the same time, the rotation of the stirring shaft 601 causes its lower surface to contact the second extrusion block 503 and squeeze the second extrusion block 503 downward. Since the second extrusion block 503 is connected to the spring 504, the spring 504 will shrink after being squeezed, thereby pushing the first extrusion block 502 and the movable block 501 to move upward. The movement of the movable block 501 will open the sampling hole 102, allowing the transformer oil to enter the sampling tube 1. As the motor 6 continues to run, the stirring shaft 601 rotates continuously, the sampling hole 102 remains open, and the transformer oil continues to enter the sampling tube 1 until the required sampling amount is reached. After the sampling is completed, the motor 6 is turned off, and the sampling device is removed from the transformer through the handle 303. At this time, due to the restoring force of the spring 504, the movable block 501 will reclose the sampling hole 102 to prevent the oil sample from leaking. The staff can open the tube cover 2 and take out the oil sample in the sampling tube 1 for subsequent detection and analysis.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A sampling device for transformer oil detection, comprising a sampling tube (1) and a tube cover (2), characterized in that: The sampling tube (1) is provided with a thread (104) around its upper portion, the tube cover (2) is connected to the thread (104) of the sampling tube (1), a weighted bottom (101) is provided at the bottom of the sampling tube (1), and a sampling mechanism is provided inside the sampling tube (1); The sampling mechanism includes an automatic sampling unit and an inner wall cleaning unit; The automatic sampling unit comprises a sampling hole (102), a limiting ring (103), a fixed base (4), a support bar (5), a movable block (501), a first extrusion block (502), a second extrusion block (503) and a spring (504); the sampling hole (102) is opened in the middle of the weighted bottom (101); the limiting ring (103) is fixedly connected to the periphery of the inner wall of the weighted bottom (101); the upper surface of the support bar (5) is fixedly connected to the middle of the lower surface of the movable block (501); the fixed base (4) is fixedly connected to the periphery of the lower surface of the fixed base (4); the movable block (501) is movably connected to the middle of the sampling hole (102); the lower surface of the first extrusion block (502) is fixedly connected to the middle of the upper surface of the movable block (501); the bottom of the spring (504) is fixedly connected to the lower part of the first extrusion block (502); and the top of the spring (504) is fixedly connected to the lower surface of the second extrusion block (503); The inner wall cleaning unit comprises a motor (6), a stirring shaft (601), a connecting rod (602) and a brush (603); the motor (6) is arranged in the middle of the upper surface of the pipe cover (2); the output end of the motor (6) passes through the pipe cover (2) and is fixedly connected to the upper surface of the stirring shaft (601); the middle of the connecting rod (602) is fixedly connected to the stirring shaft (601); and the brush (603) is fixedly connected to both sides of the connecting rod (602).

2. A sampling device for transformer oil detection according to claim 1, characterized in that: Fixed blocks (301) are fixedly connected to both sides of the upper surface of the tube cover (2); a connecting strip (302) is rotatably connected to the middle of the fixed block (301); a handle (303) is fixedly connected to the left side of the connecting strip (302); and the handle (303) is fixedly connected to the sides of the connecting strip (302) away from each other at the lower sides of the two sides inside.

3. A sampling device for transformer oil detection according to claim 1, characterized in that: Concrete is arranged inside the weighted bottom (101).

4. A sampling device for transformer oil detection according to claim 1, characterized in that: The upper surface of the second extrusion block (503) overlaps the lower surface of the stirring shaft (601).

5. A sampling device for transformer oil detection according to claim 1, characterized in that: There are two connecting rods (602), which are respectively arranged at the upper and lower ends of the stirring shaft (601), and brushes (603) are arranged at both ends of each connecting rod (602), and the brushes (603) are placed up and down.

6. A sampling device for transformer oil detection according to claim 1, characterized in that: The length of the support bar (5) is greater than the length of the fixed base (4).

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