An oil level gauge double casing structure resistant to oil level fluctuation

Abstract

An oil level gauge double bushing structure resistant to oil level fluctuation, comprising a bushing matched with an oil level gauge flange, the bushing comprising an outer bushing and an inner bushing, the inner bushing being located inside the outer bushing and the outer wall of the inner bushing being attached to the inner wall of the outer bushing, a plurality of first hole positions and a plurality of second hole positions being symmetrically arranged on both sides of the outer bushing, a plurality of third hole positions matched with the first hole positions and the second hole positions being symmetrically arranged on both sides of the inner bushing, a head being arranged on the top of the outer bushing, a limiting groove and an opening groove being arranged on the head, a limiting top cover matched with the limiting groove being fixedly connected to the top of the inner bushing, and a knob matched with the opening groove being arranged on the limiting cover. The double bushing structure with the above structure can manually adjust the size of the oil leakage hole, significantly reducing the influence of oil level fluctuation in the oil tank on the measurement of the oil level gauge, solving the problem of measurement distortion caused by abnormal oil level in the bushing due to design defects of the single bushing, improving the accuracy of the measurement of the oil level gauge, and avoiding the occurrence of oil level contact point misoperation.

Description

Technical Field

[0001] This utility model relates to the field of oil level gauge technology for hydroelectric generators, and in particular to a double-column structure for an oil level gauge that resists oil level fluctuations. Background Technology

[0002] Currently, when measuring the oil level in the water-guided oil tank of large hydropower station units, the operation of the water-guided pump during unit startup causes significant changes in oil flow within the tank. This fluctuation can lead to large variations in the measured value when the level gauge is used directly, potentially resulting in abrupt changes. Furthermore, because the oil in the water-guided oil tank flows in a single direction for extended periods during unit operation, the level gauge's measuring structure is susceptible to deformation under external forces, causing it to malfunction. Currently, a common practice is to install a protective casing with vent holes and oil drain holes outside the level gauge measuring device to stabilize the oil flow within the measuring range and reduce the probability of sensor deformation due to external forces.

[0003] However, because the oil level in the oil tank near the inner side of the main shaft decreases rapidly during unit operation, and the opening direction of the oil leakage hole on the current casing faces the outer side of the main shaft, the oil level in the casing will slowly rise. The float type and pressure type oil level gauges that are widely used are easily affected during measurement, resulting in inaccurate measurement. As an important signal for unit shutdown and water pump start-up and shutdown, inaccurate measurement will cause significant equipment and economic losses. Summary of the Invention The technical problem to be solved by this utility model is to provide a double-casing structure for oil level gauges that is resistant to oil level fluctuations. The double-casing structure with manually adjustable oil leakage hole significantly reduces the impact of oil level fluctuations in the oil tank on the oil level gauge measurement. It solves the problem of measurement distortion caused by abnormal oil level in the casing due to the design defects of a single casing, improves the accuracy of oil level gauge measurement, and avoids the occurrence of malfunction of oil level contact. The device has a simple overall structure, is easy and flexible to operate, and is highly practical.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a double-casing structure for oil level gauges that resists oil level fluctuations, including a casing that mates with the flange of the oil level gauge. The casing includes an outer casing and an inner casing. The inner casing is located inside the outer casing and its outer wall is in contact with the inner wall of the outer casing. Multiple sets of first holes and multiple sets of second holes are symmetrically provided on both sides of the outer casing. Multiple sets of third holes that mate with the first holes and second holes are symmetrically provided on both sides of the inner casing. The top of the outer casing is provided with an end, and the end is provided with a limiting groove and an opening groove. A limiting top cover that mates with the limiting groove is fixedly connected to the top of the inner casing. The limiting top cover is provided with a dial that mates with the opening groove.

[0005] In a preferred embodiment, the multiple sets of first holes and multiple sets of second holes are arranged in two columns in three rows (top, middle, and bottom) on the side wall of the outer cylinder.

[0006] In a preferred embodiment, the multiple sets of third holes are arranged in two columns in three rows (top, middle, and bottom) on the side wall of the inner cylinder.

[0007] In a preferred embodiment, the diameter of the first hole is larger than that of the second and third holes.

[0008] In a preferred embodiment, the second and third holes have the same diameter. In a preferred embodiment, the multiple sets of third holes symmetrically arranged on both sides of the inner cylinder correspond to the multiple sets of first holes and multiple sets of second holes on the adjacent outer cylinder, and the center points of the adjacent holes are at the same position.

[0009] In a preferred embodiment, the end is a circular end, and the opening angle of the slot on the end does not exceed forty-five degrees.

[0010] In a preferred embodiment, the outer cylinder is provided with multiple sets of first connecting pipe heads that mate with the first hole.

[0011] In a preferred embodiment, the outer cylinder is provided with multiple sets of second connecting pipe heads that mate with the second hole.

[0012] In a preferred embodiment, the diameter of the top hole in the plurality of first holes, second holes, and third holes is smaller than the diameter of the holes in other positions.

[0013] The present invention provides a double-casing structure for an oil level gauge that resists oil level fluctuations. By adopting the above structure, it has the following beneficial effects: (1) The double-casing structure with manually adjustable oil leakage hole size significantly reduces the impact of oil level fluctuations in the oil tank on the oil level gauge measurement; (2) It solves the problem of measurement distortion caused by abnormal oil level inside the casing due to the design defect of the single casing, improves the accuracy of oil level gauge measurement, and avoids the occurrence of erroneous oil level contact. (3) The device has a simple overall structure, is easy and flexible to operate, and is extremely practical. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 3 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 4 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 5 This is a schematic diagram showing the overall structure of this utility model disassembled.

[0019] Figure 6 This is a schematic diagram showing the overall structure of this utility model disassembled.

[0020] Figure 7 This is a schematic diagram of the overall oil hole size adjustment structure of the device of this utility model.

[0021] Figure 8 This is a schematic diagram of the overall oil hole size adjustment structure of the device of this utility model.

[0022] In the diagram: outer cylinder 1, end 2, limiting groove 3, first hole 4, second hole 5, opening groove 6, inner cylinder 7, limiting top cover 8, third hole 9, dial 10, first connecting pipe head 11, second connecting pipe head 12. Detailed Implementation

[0023] Example 1: like Figure 1-8 A double-casing structure for an oil level gauge that resists oil level fluctuations includes a casing that mates with the flange of the oil level gauge. The casing includes an outer casing 1 and an inner casing 7. The inner casing 7 is located inside the outer casing 1 and its outer wall is fitted to the inner wall of the outer casing 1. Multiple sets of first holes 4 and multiple sets of second holes 5 are symmetrically provided on both sides of the outer casing 1. Multiple sets of third holes 9 that mate with the first holes 4 and the second holes 5 are symmetrically provided on both sides of the inner casing 7. An end 2 is provided at the top of the outer casing 1. The end 2 is provided with a limiting groove 3 and an opening groove 6. A limiting top cover 8 that mates with the limiting groove 3 is fixedly connected to the top of the inner casing 7. A dial 10 that mates with the opening groove 6 is provided on the limiting top cover 8.

[0024] In the preferred embodiment, the multiple sets of first holes 4 and multiple sets of second holes 5 are arranged in two columns in three rows (top, middle, and bottom) on the side wall of the outer cylinder 1.

[0025] In the preferred embodiment, the multiple sets of third holes 9 are arranged in two columns in three rows (top, middle, and bottom) on the side wall of the inner cylinder 7.

[0026] In a preferred embodiment, the diameter of the first hole 4 is larger than that of the second hole 5 and the third hole 9.

[0027] In a preferred embodiment, the second hole 5 and the third hole 9 have the same diameter. In the preferred embodiment, the multiple sets of third holes 9 symmetrically arranged on both sides of the inner cylinder 7 correspond to the multiple sets of first holes 4 and multiple sets of second holes 5 on the adjacent outer cylinder 1, and the center points of the adjacent holes are at the same position.

[0028] In a preferred embodiment, the end 2 is a circular end, and the opening angle of the slot 6 on the end 2 does not exceed forty-five degrees.

[0029] In a preferred embodiment, the outer cylinder 1 is provided with multiple sets of first connecting pipe heads 11 that mate with the first hole position 4.

[0030] In a preferred embodiment, the outer cylinder 1 is provided with multiple sets of second connecting pipe heads 12 that mate with the second hole position 5.

[0031] In a preferred embodiment, the diameter of the top hole in the plurality of first holes 4, second holes 5, and third holes 9 is smaller than the diameter of the holes in the other positions.

[0032] Example 2: like Figure 7 and 8 In the middle, multiple sets of first holes 4 and multiple sets of second holes 5 are arranged in two columns in three rows, top, middle and bottom, on the side wall of the outer cylinder 1. The first hole 4 in the top row is a vent hole with a diameter of 30mm, and the first hole 4 in the middle and bottom is an oil inlet leakage hole with a diameter of 40mm. The second hole 5 in the top row is a vent hole with a diameter of 10mm, and the second hole 5 in the middle and bottom is an oil outlet through hole with a diameter of 20mm.

[0033] Example 3: like Figure 5 and 6 In the middle, multiple sets of third holes 9 are arranged in two columns in three rows, top, middle and bottom, on the side wall of the inner cylinder 7. The third holes 9 in the top row are vent holes with a diameter of 10mm, and the third holes 9 in the middle and bottom are oil inlet side leakage holes with a diameter of 20mm.

[0034] Example 4: like Figure 1-8 In the process, by rotating the inner cylinder 7 (with a dial stroke of ±22.5°), the hole alignment method can be switched. The fitting accuracy between the limiting top cover 8 and the limiting groove 3 reaches H7 / g6, ensuring that the position deviation of the inner cylinder 7 after adjustment is ≤0.1mm, thus avoiding measurement errors caused by misalignment.

[0035] Example 5: like Figure 1-8 The working principle of this utility model is as follows: The inner and outer casings are nested together, with only the outer casing 1 fixed to the enamel of the oil level gauge. The inner casing 7 can rotate no more than 45° within the outer casing 1. This ensures that if the oil level inside the casing becomes abnormal, the inner casing 7 can be manually rotated to change the size of the oil outlet leakage hole, returning the oil level inside the casing to its true value. The effect after assembling the two casings on the oil inlet side and after rotation is as follows: Figure 7 and Figure 8 What is shown.

[0036] The beneficial effects of this utility model are as follows: the double-casing structure with manually adjustable oil leakage hole size significantly reduces the impact of oil level fluctuations in the oil tank on the oil level gauge measurement; it solves the problem of measurement distortion caused by abnormal oil level in the casing due to the design defects of the single casing, improves the accuracy of oil level gauge measurement, and avoids the occurrence of erroneous oil level contact; the overall structure of the device is simple, the operation is convenient and flexible, and it is highly practical.

Claims

1. An oil level gauge double casing structure resistant to oil level fluctuation, comprising a casing cooperating with an oil level gauge flange, characterized in that: The protective sleeve includes an outer cylinder (1) and an inner cylinder (7). The inner cylinder (7) is located inside the outer cylinder (1) and its outer wall is in contact with the inner wall of the outer cylinder (1). The outer cylinder (1) is provided with multiple sets of first holes (4) and multiple sets of second holes (5) on symmetrical positions on both sides. The inner cylinder (7) is provided with multiple sets of third holes (9) that cooperate with the first holes (4) and the second holes (5) on both sides. The top of the outer cylinder (1) is provided with an end (2). The end (2) is provided with a limiting groove (3) and an opening groove (6). The top of the inner cylinder (7) is fixedly connected with a limiting top cover (8) that cooperates with the limiting groove (3). The limiting top cover (8) is provided with a dial (10) that cooperates with the opening groove (6).

2. The dual spool structure of the oil level gauge resistant to oil level fluctuation according to claim 1, characterized in that: The multiple sets of first holes (4) and multiple sets of second holes (5) are arranged in two columns in three rows, top, middle and bottom, on the side wall of the outer cylinder (1).

3. The dual spool structure of the oil level gauge resistant to oil level fluctuation according to claim 1, characterized in that: The multiple sets of third holes (9) are arranged in two columns in three rows, upper, middle and lower, on the side wall of the inner cylinder (7).

4. The dual spool structure of the oil level gauge resistant to oil level fluctuation according to claim 1, characterized in that: The diameter of the first hole (4) is larger than that of the second hole (5) and the third hole (9).

5. The dual spool structure of the oil level gauge resistant to oil level fluctuation according to claim 1, characterized in that: The second hole (5) and the third hole (9) have the same diameter.

6. The dual spool structure of the oil level gauge resistant to oil level fluctuation according to claim 1, characterized in that: The multiple sets of third holes (9) symmetrically arranged on both sides of the inner cylinder (7) correspond to the multiple sets of first holes (4) and multiple sets of second holes (5) on the adjacent outer cylinder (1), and the center points of the adjacent holes are in the same position.

7. The dual spool structure of the oil level gauge resistant to oil level fluctuation according to claim 1, characterized in that: The end (2) is a circular end, and the opening angle of the opening groove (6) on the end (2) does not exceed forty-five degrees.

8. The dual spool structure of the oil level gauge resistant to oil level fluctuation according to claim 1, characterized in that: The outer cylinder (1) is provided with multiple sets of first connecting pipe heads (11) that cooperate with the first hole (4).

9. The dual spool structure of the oil level gauge resistant to oil level fluctuation according to claim 1, characterized in that: The outer cylinder (1) is provided with multiple sets of second connecting pipe heads (12) that cooperate with the second hole (5).

10. The dual spool structure of the oil level gauge resistant to oil level fluctuation according to claim 1, characterized in that: The diameter of the top hole in the multiple sets of first holes (4), multiple sets of second holes (5) and multiple sets of third holes (9) is smaller than the diameter of the holes in other positions.

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