An auxiliary device for testing the gas content of insulating oil

Abstract

The present invention relates to the technical field of an auxiliary device for testing the gas content in insulating oil. The fixed bracket and the movable bracket of the device are both in an "L" shape. The horizontal rod of the fixed bracket is slidably connected to the horizontal rod of the movable bracket. The vertical rod of the fixed bracket and the vertical rod of the movable bracket can clamp the testing instrument. An injector holder is connected to the outside of the vertical rod of the movable bracket. A fixing ring with adjustable size is arranged on the injector holder. The end of the vertical rod of the fixed bracket is a clamping part. The present invention can solve the problem of changing the placement direction of the syringe without damaging the outer shell of the original instrument, reduce or even avoid the error caused by the fact that when the injector is placed horizontally, since the density of the gas is less than that of the oil, the bubbles will float up and participate in the analysis and calculation during the process of the instrument extracting the oil sample, improve the accuracy of the test. At the same time, the device can be freely disassembled to achieve its flexibility.

Description

Technical Field

[0001] The present invention relates to the technical fields of electric power and chemical test equipment, and in particular to an auxiliary device related to the determination of the gas content in insulating oil. Background Art

[0002] As one of the items of live detection, the insulating oil test is an effective measure to monitor the safe operation of important oil-filled power equipment. The test of the gas content in insulating oil is a specific test item for 500 kV main transformers (reactors), and its test significance is particularly important.

[0003] During the test process, the gas content in the vast majority of transformer oils exceeds the standard due to the entry of air. Since the density of the gas is less than that of the oil, when the syringe sampler is placed horizontally, the air bubbles will float up and participate in the analysis and calculation during the process of the instrument extracting the oil sample, resulting in errors. In case of poor airtightness of the sampler or human operation, the error will be even greater. Although there are currently many methods for exhausting the air that is easily mixed into the sampler, either the test operation process is cumbersome or an expensive sampler needs to be purchased. Moreover, the exhaust effect is not ideal, there are still large errors, and the test results are unstable.

[0004] Currently, there is no auxiliary device that can greatly reduce errors for detecting the gas content in insulating oil. Summary of the Invention

[0005] Object of the Invention

[0006] The present invention provides an auxiliary device for testing the gas content in insulating oil, aiming to solve the problem that placing the syringe horizontally easily causes errors and affects the test accuracy.

[0007] Technical Solution

[0008] An auxiliary device for testing the gas content in insulating oil, wherein both the fixed bracket and the movable bracket of the device are in an "L" shape. The horizontal rod of the fixed bracket is slidably connected to the horizontal rod of the movable bracket, and the vertical rod of the fixed bracket and the vertical rod of the movable bracket can be clamped on the test instrument. An injector holder is connected to the outside of the vertical rod of the movable bracket, and a fixing ring with adjustable size is arranged on the injector holder. The end of the vertical rod of the fixed bracket is a clamping part.

[0009] The horizontal rod of the movable bracket is a cavity structure, the cavity structures of the fixed bracket and the movable bracket are inserted into each other, and a bolt is fixedly arranged at the end of the horizontal rod of the movable bracket, and the bolt is slidably connected to the hollow groove arranged on the fixed bracket.

[0010] When the vertical rod of the fixed bracket is set vertically downward, the clamping part is an anti-slip rubber pad; when the vertical rod of the fixed bracket is set obliquely downward, the clamping part is a torsion spring structure. The torsion spring structure includes two handle parts and a spring part. The torsion spring structure is an integral structure with the spring part arranged between the two handle parts. The included angle α between the two handle parts is 10-30 degrees; one of the handle parts is fixedly arranged inside the vertical rod of the fixed bracket, and a first anti-slip pad is fixedly arranged on the other handle part.

[0011] The cross-section of the first anti-slip pad is a right trapezoid structure. Striped protrusions are arranged on the surface of the first anti-slip pad in contact with the instrument, and the striped protrusions are wavy.

[0012] One side inside the fixed ring is set as a fixed first anti-collision strip, and the opposite side is provided with a movable second anti-collision strip. On the fixed ring, there is an opening on the opposite side of the vertical rod of the movable bracket.

[0013] One side of the second anti-collision strip that does not contact the sampler is connected with an adjusting bolt through a bearing, and the adjusting bolt is threadedly connected with the fixed ring; limiting columns are fixedly arranged at both ends of the first anti-collision strip, and the limiting columns are connected with the holes arranged at both ends of the second anti-collision strip with a clearance.

[0014] A rubber pad is arranged at the contact position between the vertical rod of the movable bracket and the instrument.

[0015] Advantages and effects

[0016] The present invention can solve the problem of changing the placement direction of the syringe without damaging the outer shell of the original instrument, reduce or even avoid the error caused by the fact that when the sampler is placed horizontally, since the density of the gas is less than that of the oil, the bubbles will float and participate in the analysis and calculation during the process of the instrument extracting the oil sample, improve the accuracy of the test, and at the same time, the device can be freely disassembled to achieve its flexibility.

[0017] Figure 1 It is a schematic structural diagram of the sampler placement structure of one form of the present device;

[0018] Figure 2 It is a schematic structural diagram of the sampler placement structure of another form of the present device;

[0019] Figure 3 It is a schematic structural diagram of the torsion spring structure;

[0020] Figure 4 It is a schematic structural diagram of the fixed ring.

[0021] Labels in the figure: 1. First anti-slip pad, 11. Strip protrusion, 2. Sampler, 3. Moving bracket, 31. Bolt, 32. Rubber pad, 4. Fixed bracket, 41. Hollow groove, 5. Clamping part, 51. Handle part, 52. Spring part, 6. Sampler holder, 7. Fixed ring, 71. First anti-collision strip, 711. Limit post, 72. Second anti-collision strip, 721. Hole, 73. Adjusting bolt, 74. Opening.

[0022] The present invention will be described in more detail below with reference to the accompanying drawings of the specification.

[0023] Without damaging the original instrument housing, the present invention redesigns the fixing device for the syringe placement rack. Since the sampler is a glass syringe for sampling, it is relatively heavy. Currently, during the test operation, the sampler is horizontally placed on the upper part of the instrument box to avoid scratching and falling. However, through long-term detection tests, it is found that because the sampler is horizontally placed, the density of the gas mixed in the sampler is less than the density of the oil, and the air bubbles will float up and participate in the analysis and calculation during the process of the instrument extracting the oil sample, resulting in errors and inaccurate data for the measurement of the gas content in the insulating oil. After analysis, by changing the placement direction of the sampler to make it vertically placed, according to the fact that the density of the gas is less than the density of the oil, the gas will also float up, but when injecting the sample into the instrument, the mixed gas will not be introduced into the instrument. After multiple tests, the data is verified to be stable and highly accurate.

[0024] The present invention changes the placement direction of the syringe and can be applied to existing instruments without modifying or damaging the instrument itself. It can adjust the clamping length and is convenient to disassemble. The designed torsion spring structure can firmly clamp the sampler on the instrument even if the sampler is relatively heavy. The heavier the sampler, the firmer it is clamped, ensuring safety during use.

[0025] As Figure 1-2 shown, an auxiliary device for measuring the gas content in insulating oil, the fixed bracket 4 and the moving bracket 3 of the device are both in an "L" shape. The horizontal rod of the fixed bracket 4 is slidably connected to the horizontal rod of the moving bracket 3. The vertical rod of the fixed bracket 4 and the vertical rod of the moving bracket 3 can be clamped on the test instrument. An injector holder 6 is connected to the outside of the vertical rod of the moving bracket 3. A fixed ring 7 with adjustable size is provided on the injector holder 6. The sampler 2 is placed inside the fixed ring 7. The end of the vertical rod of the fixed bracket 4 is a clamping part 5.

[0026] The transverse rod of the movable bracket 3 is a cavity structure. The fixed bracket 4 is inserted into the cavity structure of the movable bracket 3. A bolt 31 is fixedly arranged at the end of the transverse rod of the movable bracket 3. The bolt 31 is slidably connected with a hollow groove 41 arranged on the fixed bracket 4. The diameter of the bolt 31 matches the height of the hollow groove 41. The fixed bracket 4 and the movable bracket 3 slide in the hollow groove 41 through the bolt 31 to adjust the length of the whole device, which is convenient for adapting to different instrument sizes and clamping the whole device on the instrument. Both the fixed bracket 4 and the movable bracket 3 are made of stainless steel strips. The movable bracket 3 is made of slightly softer stainless steel strips, which is convenient for tightening the bolt 31 to make the fixed bracket 4 and the movable bracket 3 fit tightly and be fixedly connected.

[0027] As Figure 1 shown, when the vertical rod of the fixed bracket 4 is vertically downward, the clamping part 5 is an anti-slip rubber pad, which is used to increase the contact area, improve the friction force and ensure the clamping stability. This structure is suitable for the case where the mass of the sampler 2 is relatively light. When the mass of the sampler 2 is relatively heavy, as Figure 2 shown, the vertical rod of the fixed bracket 4 is inclined downward, and the clamping part 5 is a torsion spring structure. The torsion spring structure includes two handle parts 51 and a spring part 52. The torsion spring structure is an integral structure with the spring part 52 arranged between the two handle parts 51. One of the handle parts 51 is fixedly arranged in the vertical rod of the fixed bracket 4, and a first anti-slip pad 1 is fixedly arranged on the other handle part 51. The included angle α between the two handle parts 51 is about 10 - 30 degrees. It is convenient to clamp more stably within this angle range. If the angle α is less than 10 degrees, the elastic change is small, and when the sampler is heavier, the vertical rod of the fixed bracket 4 is likely to lift up. When the angle α is greater than 30 degrees, the contact area between the first anti-slip pad 1 of the handle part 51 and the instrument is small, the friction force is small, and the grasping is not firm, and the vertical rod of the fixed bracket 4 is also likely to lift up. When the sampler is heavier, it will cause the vertical rod of the fixed bracket 4 to lift up. When the vertical rod lifts up, the surface of the instrument in contact with the handle part 51 jointly squeezes the torsion spring structure, making the spring part 52 contract. The force is mutual, that is, the rebounding force of the spring part 52 simultaneously touches the vertical rod of the fixed bracket 4 and the surface of the instrument in contact with the handle part 51, making the clamping force tighter. The first anti-slip pad 1 is used to increase the friction force and avoid slipping.

[0028] As Figure 2 shown, the cross-section of the first anti-slip pad 1 is a right trapezoid structure. The surface where the hypotenuse of the right trapezoid structure is located contacts the instrument, and the angle of the hypotenuse is about 75 - 95 degrees. When the torsion spring structure is squeezed, it can ensure that a larger area of the first anti-slip pad 1 contacts the instrument, increase the friction force, and ensure the clamping stability.

[0029] As Figure 3As shown, stripe protrusions 11 are provided on the surface of the first anti-slip pad 1 in contact with the instrument, and the stripe protrusions 11 are wavy. This increases the frictional force between the first anti-slip pad 1 and the instrument, making the clamping more stable.

[0030] As Figure 4 shown, on one side inside the fixing ring 7, a fixed first anti-collision strip 71 is provided, and on the opposite side, a movable second anti-collision strip 72 is provided. On the fixing ring 7, openings 74 are provided on the opposite sides of the vertical rods of the moving bracket 3. Since the sampler 2 needs to be connected to the gas content instrument with a sampling rubber hose after taking an oil sample, in order to ensure that the sampler 2 with a rubber hose can be more conveniently installed on the sampler holder 6, openings 74 are left at the upper and lower fixing rings 7 of the sampler holder 6.

[0031] On the side of the second anti-collision strip 72 that does not contact the sampler 2, an adjusting bolt 73 is connected through a bearing, and the adjusting bolt 73 is threadedly connected to the fixing ring 7; two end portions of the first anti-collision strip 71 are fixedly provided with limit posts 711, and the limit posts 711 are connected with holes 721 provided at two end portions of the second anti-collision strip 72 with a clearance.

[0032] Turn the adjusting bolt 73 to adjust the distance between the second anti-collision strip 72 and the first anti-collision strip 71, so as to be able to adapt to samplers 2 of different sizes to meet the requirements of different detections.

[0033] A rubber pad 32 is provided at the contact portion between the vertical rod of the moving bracket 3 and the instrument. To protect the instrument from being worn by this device.

[0034] Usage method:

[0035] Fix the sampler holder 6 on the outer surface of the vertical rod of the moving bracket 3 with bolts. Loosen the bolts 31, adjust the distance between the fixing bracket 4 and the moving bracket 3, so that the clamping portion 5 on the fixing bracket 4 and the rubber pad 32 on the vertical rod of the moving bracket 3 tightly clamp the left side and the right side of the instrument. Tighten the bolts 31 to fixedly connect the fixing bracket 4 and the moving bracket 3 and clamp them on the instrument. The sampler 2 connected with a rubber hose is stuck on the fixing ring 7, and then relevant experiments can be carried out.

Claims

1. An auxiliary device for testing the gas content of insulating oil, characterized in that: The fixed bracket (4) and the movable bracket (3) of the device are both in an "L" shape. The horizontal rod of the fixed bracket (4) is slidably connected to the horizontal rod of the movable bracket (3). The vertical rod of the fixed bracket (4) and the vertical rod of the movable bracket (3) can clamp on the test instrument. An injector holder (6) is connected to the outside of the vertical rod of the movable bracket (3). A fixing ring (7) with adjustable size is arranged on the injector holder (6). The end of the vertical rod of the fixed bracket (4) is a clamping part (5). The horizontal rod of the movable bracket (3) is a cavity structure. The fixed bracket (4) is inserted into the cavity structure of the movable bracket (3). A bolt (31) is fixedly arranged at the end of the horizontal rod of the movable bracket (3). The bolt (31) is slidably connected to a hollow groove (41) arranged on the fixed bracket (4). When the vertical rod of the fixed bracket (4) is vertically downward, the clamping part (5) is an anti-slip rubber pad. When the vertical rod of the fixed bracket (4) is inclined downward, the clamping part (5) is a torsion spring structure. The torsion spring structure includes two handle parts (51) and a spring part (52). The torsion spring structure is an integral structure with the spring part (52) arranged between the two handle parts (51). The included angle α between the two handle parts (51) is 10 - 30 degrees. One of the handle parts (51) is fixedly arranged inside the vertical rod of the fixed bracket (4), and a first anti-slip pad (1) is fixedly arranged on the other handle part (51).

2. The auxiliary device for testing the gas content in insulating oil according to claim 1, wherein: The cross-section of the first anti-slip pad (1) is a right trapezoid structure. Striped protrusions (11) are arranged on the surface of the first anti-slip pad (1) in contact with the instrument, and the striped protrusions (11) are wavy.

3. The auxiliary device for testing the gas content of insulating oil according to claim 1, wherein: On one side inside the fixing ring (7), a fixed first anti-collision strip (71) is arranged. On the opposite side, a movable second anti-collision strip (72) is arranged. An opening (75) is arranged on the opposite side of the vertical rod of the movable bracket (3) on the fixing ring (7).

4. The auxiliary device for testing the gas content of insulating oil according to claim 3, wherein: One side of the second anti-collision strip (72) that does not contact the injector (2) is connected by a bearing to an adjusting bolt (73). The adjusting bolt (73) is threadedly connected to the fixing ring (7). Limit posts (711) are fixedly arranged at both ends of the first anti-collision strip (71). The limit posts (711) are connected with holes (721) arranged at both ends of the second anti-collision strip (72) with a clearance.

5. The auxiliary device for testing the gas content of insulating oil according to claim 1, wherein: A rubber pad (32) is arranged at the contact position between the vertical rod of the movable bracket (3) and the instrument.

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