Detector based on oil level gauge

Abstract

The invention relates to a detector based on an oil level indicator, which comprises a floating rod type oil level indicator, the floating rod type oil level indicator comprises an instrument, a rocker arm, a floating rod and a floating ball, the detector is characterized by further comprising a bearing seat and an assembly arm rotationally mounted on the bearing seat, and the rotating axis of the assembly arm coincides with the rotating axis of the rocker arm; a folding arm is hinged to the free end of the assembling arm, a reaction rod which is attached to the lower side of the floating rod and lifts the floating rod when the assembling arm swings upwards is arranged on the side portion of the folding arm, and a pressure sensor assembly used for sensing pressure borne by the reaction rod is arranged in the folding arm. The tester based on the oil level gauge can check and test the rotating jamming problem of the rocker arm of the floating rod type oil level gauge, normal metering of the oil level gauge is prevented from being affected, it is guaranteed that the oil level gauge can conduct metering accurately, the detection accuracy is high, dismounting is not needed, and the tester is convenient, practical, short in consumed time and high in efficiency.

Description

Technical Field

[0001] The present invention relates to the field of oil level gauges, and particularly to an inspector based on an oil level gauge. Background Art

[0002] The float rod type oil level gauge of a transformer mainly consists of parts such as a float ball, a float rod, a rocker arm, and an instrument. When the oil level in the conservator of the transformer rises or falls, the float ball floats up and down accordingly, causing the float rod to swing up and down. The float rod drives the rocker arm to rotate, and the rocker arm is associated with the pointer of the instrument through gear transmission or magnetic transmission, so as to control the operation of the pointer through the swing of the float rod to measure the oil level height.

[0003] After long-term use of the float rod type oil level gauge, it is necessary to check whether the float ball, the float rod, and the rocker arm can work normally to ensure that the oil level gauge can accurately measure and avoid the problem of false oil level in the oil level gauge. Currently, disassembly inspection is required, which is very inconvenient, time-consuming, and inefficient. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a convenient, practical, time-saving, and efficient inspector based on an oil level gauge, which can perform calibration tests on the jamming problem of the rocker arm rotation of the float rod type oil level gauge to ensure that the oil level gauge can accurately measure.

[0005] The present invention is implemented as follows: An inspector based on an oil level gauge includes a float rod type oil level gauge. The float rod type oil level gauge includes an instrument, a rocker arm, a float rod, and a float ball. It also includes a bearing seat and an assembly arm rotatably mounted on the bearing seat. The rotation axis of the assembly arm coincides with the rotation axis of the rocker arm. A folding arm is hinged to the free end of the assembly arm. A reaction rod that adheres to the lower side of the float rod and lifts the float rod when the assembly arm swings upward is provided on the side of the folding arm. A pressure sensor assembly for sensing the pressure received by the reaction rod is provided inside the folding arm.

[0006] Further, a centering mechanism for positioning the rotation axis of the assembly arm is connected to the bearing seat above the rocker arm.

[0007] Further, the centering mechanism includes a limit seat fixedly connected to the bearing seat and a semi-circular clamp cooperating with the rocker arm. The axis of the semi-circular clamp coincides with the rotation axis of the assembly arm. A clamping rail is provided at the lower part of the limit seat. The semi-circular clamp consists of two arc-shaped clamps that can slide synchronously towards or away from each other along the clamping rail. The sliding direction of the two arc-shaped clamps is perpendicular to the rotation axis of the assembly arm. A regulator for controlling the movement of the two arc-shaped clamps is provided on the limit seat.

[0008] Further, the regulator includes a screw rod located above the semi-circular clamp. The screw rod is rotatably connected to the upper part of the limit seat. A linkage block is threadedly connected to the screw rod. Inclined fine-tuning connecting rods are respectively connected between both sides of the linkage block and the two arc-shaped clamps.

[0009] Further, flexible resistance films are laid on the arc-shaped inner walls of the two arc-shaped clamps, and touch sensing points are arranged on the surfaces of the flexible resistance films.

[0010] Further, the pressure sensing assembly includes a limit groove opened on the side of the folding arm. A reaction block capable of sliding up and down relative to it is arranged in the limit groove. The reaction rod is fixedly connected to the reaction block. A limit spring is installed between the top of the reaction block and the inner top of the limit groove. A pressure sensor is arranged at the bottom of the limit groove. A contact rod in contact with the pressure sensor is fixedly connected to the bottom of the reaction block.

[0011] Further, the sliding path of the reaction block is an arc, the limit groove is an arc-shaped structure, and the center of the arc sliding path of the reaction block is located on the rotation axis of the assembly arm.

[0012] Further, the hinged end of the folding arm is provided with a special-shaped end. A pin shaft is rotatably installed at the free end of the assembly arm. The special-shaped end is fixedly connected to the outside of the pin shaft. The assembly arm is provided with a damping spring that makes the folding arm swing downward through its own elasticity. A stop strip that abuts against the lower side of the special-shaped end to limit the downward swing angle of the folding arm is also arranged at the free end of the assembly arm.

[0013] Further, a rotation angle sensor is arranged on one side of the bearing seat. A calibration shaft rotatably connected to the bearing seat is arranged on the rotation axis of the assembly arm. One end of the calibration shaft is coaxially connected to the rotation angle sensor.

[0014] Further, a motor is arranged on the other side of the bearing seat. The other end of the calibration shaft is coaxially connected to the main shaft of the motor.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The tester based on the oil level gauge of the present invention can perform calibration tests on the jamming problem of the rocker arm rotation of the float type oil level gauge, avoid affecting the normal measurement of the oil level gauge, ensure that the oil level gauge can accurately measure, has high detection accuracy, does not need to be disassembled, is convenient and practical, takes a short time, and has high efficiency.

[0016] In addition, the tester based on the oil level gauge of the present invention also has many other advantages, which will be further described in detail in combination with the following specific embodiments.

[0017] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below through specific embodiments and related drawings. Description of the Drawings

[0018] Figure 1Schematic diagram of the overall structure of the embodiment of the present invention; Figure 2 Schematic diagram of the embodiment of the present invention with the instrument omitted; Figure 3 Schematic three-dimensional structure diagram of the assembly arm, folding arm and reaction rod in the embodiment of the present invention; Figure 4 Schematic three-dimensional structure diagram of the folding arm in the embodiment of the present invention; Figure 5 Exploded view of the folding arm and the pressure sensing component in the embodiment of the present invention; Figure 6 Cross-sectional view of the connection part between the assembly arm and the folding arm in the embodiment of the present invention; Figure 7 Schematic three-dimensional structure diagram of the regulator in the embodiment of the present invention; In the figure: 1, instrument; 2, rocker arm; 3, float rod; 4, bearing seat; 5, assembly arm; 6, folding arm; 7, reaction rod; 8, corner sensor; 9, arc-shaped clamp; 11, special-shaped end; 12, limit groove; 13, reaction block; 14, contact rod; 15, micro ceramic pressure sensor; 16, damping spring; 17, stop bar; 18, limit seat; 19, screw; 20, linkage block; 21, fine-tuning link; 22, card rail; 23, calibration shaft. Detailed implementation manners

[0019] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0020] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "comprise" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0021] As Figures 1 to 7 shown, an inspector based on an oil level gauge includes a float rod type oil level gauge, and the float rod type oil level gauge includes an instrument 1, a rocker arm 2, a float rod 3 and a float ball. It is characterized in that: it further includes a bearing seat 4 and an assembly arm 5 rotatably installed on the bearing seat 4, and the rotation axis line of the assembly arm 5 coincides with the rotation axis line of the rocker arm 2; a folding arm 6 is hinged to the free end of the assembly arm 5, and a reaction rod 7 is provided on the side of the folding arm 6 that adheres to the lower side of the float rod 3 and lifts the float rod 3 when the assembly arm swings upward, and a pressure sensor assembly for sensing the pressure received by the reaction rod 7 is provided inside the folding arm 6.

[0022] By making the assembly arm and the rocker arm rotate coaxially, and the reaction rod can form a conflict with the float rod, when the assembly arm rotates, the float rod can be rotated to simulate the normal operation of the float rod. When the displacement of the reaction rod is blocked or suddenly changed, the reaction rod can transmit or transfer the pressure to the pressure sensor assembly, so as to determine whether a jamming problem occurs based on the changes in the pressure sensor assembly. Secondly, by making the assembly arm and the rocker arm rotate coaxially, the error caused by axis deviation can be reduced to ensure the accuracy of the test results. It can also reduce the additional load caused by torque eccentricity, so that the test results are closer to the actual working state of the rocker arm and the float rod.

[0023] The rocker arm 2, the float rod 3 and the like constitute the transmission mechanism of the float rod type oil level gauge. After long-term use, the transmission mechanism needs to be inspected and tested to ensure that the oil level gauge can accurately measure. The present invention can verify and test the rotation jamming problem of the rocker arm of the float rod type oil level gauge to avoid affecting the normal measurement of the oil level gauge.

[0024] As a further preferred embodiment, the bearing seat 4 is connected to a centering mechanism located above the rocker arm 2 for positioning the rotation axis of the assembly arm 5 .

[0025] As a further preferred embodiment, the centering mechanism includes a limit seat 18 fixedly connected to the bearing seat 4 and a semicircular clamp matched with the rocker arm, the axis of the semicircular clamp coincides with the rotation axis of the assembly arm 5; a clamping rail 22 is provided at the lower part of the limit seat 18, and the semicircular clamp consists of two arc clamps 9 that can slide synchronously toward or away from each other along the clamping rail 22, the sliding direction of the two arc clamps 9 is perpendicular to the rotation axis of the assembly arm 5, and a regulator for controlling the movement of the two arc clamps 9 is provided on the limit seat 18. Figure 7 As shown, since the center of the semicircular clamp is located on the rotation axis of the assembly arm 5, that is, when the semicircular clamp is docked with the rocker arm 2, the rotation axis of the assembly arm 5 and the rotation axis of the rocker arm 2 are collinear, that is, the assembly arm 5 can reach the exact position so that the two can complete coaxial rotation. The coaxial rotation can improve the inspection accuracy and the simulation effect is better.

[0026] As a further preferred embodiment, the regulator includes a screw 19 located above the semicircular clamp, the screw 19 is rotatably connected to the upper part of the limit seat 18, a linkage block 20 is threadedly connected to the screw 19, and obliquely arranged fine-tuning links 21 are respectively connected between the two sides of the linkage block 20 and the two arc-shaped clamps 9, and the two fine-tuning links 21 are symmetrically arranged to form an eight-shaped shape. When the linkage block 20 moves downward, the two arc-shaped clamps 9 can move in opposite directions, such as Figure 7As shown, the card rail 22 is used for sliding limit of the two arc-shaped clamps 9, and the sliding directions of the two arc-shaped clamps 9 are perpendicular to the rotation axis of the assembly arm 5. Therefore, when the two arc-shaped clamps 9 are displaced relative to each other, the two arc-shaped clamps 9 can move away from each other and disengage from the rocker arm 2, and then the entire tester can be removed, thus avoiding the influence of the arc-shaped clamps 9 on the operation of the assembly arm 5. Specifically, when the screw 19 is rotated, due to the threaded assembly relationship between the screw 19 and the linkage block 20, and the linkage block 20 is restricted from rotating by the fine-tuning connecting rod 21. At this time, the rotation of the screw 19 can drive the linkage block 20 to move up and down, and the up and down movement of the linkage block 20 can drive the two arc-shaped clamps 9 to perform relative displacement.

[0027] As a further preferred embodiment, flexible resistive films are laid on the arc-shaped inner walls of the two arc-shaped clamps 9, and touch-sensitive points 24 are arranged on the surface of the flexible resistive films. The flexible resistive films can indeed apply pressure at multiple points and can sense the pressure changes at each point. Through the cooperation of the flexible resistive films and the touch-sensitive points 24, when the two arc-shaped clamps 9 are docked with the rocker arm 2, the accuracy of the docking can be determined by the trigger rate of the touch-sensitive points, thereby improving the usage accuracy of the centering mechanism and enabling the assembly arm 5 to be coaxial with the rocker arm 2.

[0028] As a further preferred embodiment, the pressure sensing assembly includes a limiting groove 12 opened on the side of the folding arm 6. A reaction block 13 capable of sliding up and down relative to it is arranged in the limiting groove 12. The reaction rod 7 is fixedly connected to the reaction block 13. Limiting protrusions for preventing the reaction block 13 from disengaging from the limiting groove 12 are provided on both sides of the reaction block 13, and grooves for cooperating with the limiting protrusions are provided on both sides of the limiting groove 12. A limiting spring is installed between the top of the reaction block 13 and the inner top of the limiting groove 12. A pressure sensor 15 is provided at the bottom of the limiting groove 12. The pressure sensor 15 can adopt a micro ceramic pressure sensor. A contact rod 14 in contact with the pressure sensor is fixedly connected to the bottom of the reaction block 13. As Figure 3 、 4 shown, when there is no jamming problem in the rotation of the rocker arm 2, the pressure received by the pressure sensor 15 remains within a certain range. If the rotation of the rocker arm 2 is jammed, a greater torque or moment is required to enable the rocker arm 2 to break through or cross the jammed position. At this time, the pressure received by the pressure sensor 15 will exceed the normal range, so that it can be detected faster, as a compensation or to improve the accuracy. Through the limiting spring, the reaction block 13 can always be kept at the initial position under the preset pressure, that is, when the pressure or load received by the reaction rod 7 is not sufficient to cause the limiting spring to undergo tensile deformation, it is considered that the rotation of the rocker arm 2 is normal. Only when the rocker arm 2 is jammed, the pressure or load received by the reaction rod 7 will cause the reaction block 13 to break through the limitation of the limiting spring and apply pressure to the pressure sensor 15.

[0029] As a further preferred embodiment, in order to further improve the detection accuracy, the sliding path of the reaction block 13 is an arc, the limiting groove 12 is an arc-shaped structure, and the center of the arc sliding path of the reaction block 13 is located on the rotation axis of the assembly arm 5. By designing the arc path of the reaction block 13, the sliding of the reaction block 13 can be made more smooth, so that the point where the reaction rod 7 contacts the floating rod 3 does not change, the reaction rod 7 does not displace relative to the floating rod 3, and the micro ceramic pressure sensor 15 can better receive the pressure from the reaction rod 7.

[0030] As a further preferred embodiment, the hinged end of the folding arm 6 is provided with a special-shaped end 11. A pin shaft is rotatably installed at the free end of the assembly arm 5. The special-shaped end 11 is fixedly connected to the outside of the pin shaft. The assembly arm 5 is provided with a damping spring 16 that makes the folding arm 6 swing downward by its own elastic force. The damping spring 16 is sleeved on the outside of the pin shaft. The free end of the assembly arm 5 is also provided with a stop strip 17 that abuts against the lower side of the special-shaped end 11 to limit the downward swing angle of the folding arm 6. When the special-shaped end 11 abuts against the stop strip 17, the assembly arm 5 and the folding arm 6 are on the same straight line. The damping spring 16 drives the special-shaped end 11 to abut against the stop strip 17 in the initial state, as Figure 5 、 6 shown. In an oil tank or a large fuel tank, it is necessary to conduct an on-line inspection of the float-type oil level gauge, that is, not to remove the rocker arm 2 or the floating rod 3 for inspection, or when the internal space of the fuel tank or oil tank is not enough to place the reaction rod 7 under the floating rod 3, it is necessary to utilize the folding ability of the folding arm 6 to reflect the situation. That is, after the reaction rod 7 is blocked by the floating rod 3, the reaction rod 7 and the reaction block 13 will first slide to the lowest position. At this time, the pressure of the reaction rod 7 will be transmitted to the folding arm 6. At this time, the folding arm 6 will break through the limitation of the damping spring 16 under the pressure, causing the folding arm 6 to rotate, so as to avoid hard damage to the folding arm 6 or the reaction rod 7. Similarly, it can also avoid damage to the rocker arm 2 or the floating rod 3 of the oil level gauge. At the same time, it can also protect the ceramic diaphragm of the micro ceramic pressure sensor 15, which is convenient to remind or warn the user that the reaction rod 7 needs to be replaced for normal calibration. Secondly, the existence of the stop strip 17 can keep the assembly arm 5 and the folding arm 6 integrated, ensuring the accuracy of the detection.

[0031] As a further preferred embodiment, in order to facilitate real-time monitoring and data analysis of the rotation of the assembly arm 5, a rotation angle sensor 8 is provided on one side of the bearing housing 4. A calibration shaft 23 rotatably connected to the bearing housing 4 is provided on the rotation axis of the assembly arm 5, and one end of the calibration shaft 23 is coaxially connected to the rotation angle sensor 8; the rotation angle sensor 8 has a clamping inner ring, and the calibration shaft 23 is assembled with the clamping inner ring on the rotation angle sensor 8 and is linked through key transmission. The rotation angle sensor 8 can monitor the rotation of the assembly arm 5, and the rotation angle sensor 8 can assist in measuring the rotation angle of the assembly arm 5, thereby verifying the detection result from another aspect, and can also ensure whether the assembly arm 5 can rotate a corresponding angle under the same torque. As a further preferred embodiment, a motor is provided on the other side of the bearing housing 4, and the other end of the calibration shaft 23 is coaxially connected to the main shaft of the motor. With the cooperation of the above structures, it is possible to perform a calibration test on the rotation jamming problem of the rocker arm 2 of the float type oil level gauge to avoid affecting the normal measurement of the oil level gauge.

[0032] For any of the technical solutions disclosed in the present invention as described above, unless otherwise stated, if it discloses a numerical range, the disclosed numerical range is a preferred numerical range. Any person skilled in the art should understand that the preferred numerical range is only the numerical values with obvious technical effects or representativeness among many implementable numerical values. Since there are too many numerical values to enumerate, the present invention only discloses some numerical values to illustrate the technical solutions of the present invention, and the above-listed numerical values should not constitute a limitation on the protection scope of the present invention.

[0033] If the present invention discloses or involves components or structural members that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connected by bolts or screws), or it can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutually fixed connection can also be replaced by an integral structure (for example, manufactured by integral casting process) (except when it is obviously impossible to adopt the integral forming process).

[0034] In addition, for the terms used to represent the positional relationship or shape in any of the technical solutions disclosed in the present invention as described above, unless otherwise stated, their meanings include states or shapes that are approximate, similar or close thereto.

[0035] Any component provided by the present invention can either be assembled from multiple separate components or be a single component manufactured by an integral forming process.

[0036] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any person skilled in the relevant art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution content of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A tester based on an oil level gauge, comprising a float type oil level gauge, the float type oil level gauge comprising an instrument, a rocker arm, a float rod and a float ball, characterized in that: It also includes a bearing seat and an assembly arm rotatably mounted on the bearing seat, wherein the rotation axis of the assembly arm coincides with the rotation axis of the rocker arm; a folding arm is hinged at the free end of the assembly arm, a reaction rod is provided on the side of the folding arm for adhering to the lower side of the float rod and lifting the float rod when the assembly arm is swung upward, and a pressure sensor assembly is provided inside the folding arm for sensing the pressure on the reaction rod.

2. The oil level gauge based tester according to claim 1, characterized in that: The bearing seat is connected with a centering mechanism located above the rocker arm for positioning the rotation axis of the assembly arm.

3. The oil level gauge based tester according to claim 2, characterized in that: The centering mechanism includes a limit seat fixedly connected to the bearing seat and a semicircular clamp matched with the rocker arm, the axis of the semicircular clamp coincides with the rotation axis of the assembly arm; a clamping rail is provided at the lower part of the limit seat, and the semicircular clamp consists of two arc clamps that can slide synchronously toward or away from each other along the clamping rail, the sliding direction of the two arc clamps is perpendicular to the rotation axis of the assembly arm, and a regulator for controlling the movement of the two arc clamps is provided on the limit seat.

4. The oil level gauge based tester according to claim 3, characterized in that: The regulator comprises a screw rod located above the semicircular clamp, the screw rod is rotatably connected to the upper part of the limit seat, a linkage block is threadedly connected to the screw rod, and obliquely arranged fine-tuning connecting rods are respectively connected between the two sides of the linkage block and the two arc-shaped clamps.

5. The oil level gauge based tester according to claim 3, characterized in that: The arc-shaped inner walls of the two arc-shaped clamps are both paved with flexible resistance films, and the surfaces of the flexible resistance films are provided with sensing contacts.

6. The oil level gauge based tester according to claim 1, characterized in that: The pressure sensing assembly includes a limit groove opened on the side of the folding arm, a reaction block that can slide up and down relative to the limit groove is provided in the limit groove, the reaction rod is fixedly connected to the reaction block, a limit spring is installed between the top of the reaction block and the inner top of the limit groove, a pressure sensor is provided at the bottom of the limit groove, and a touch rod that abuts against the pressure sensor is fixedly connected to the bottom of the reaction block.

7. The oil level gauge based tester according to claim 6, characterized in that: The sliding path of the reaction block is an arc, the limiting groove is an arc-shaped structure, and the center of the arc sliding path of the reaction block is located on the rotation axis of the assembly arm.

8. The oil level gauge based tester according to claim 1, characterized in that: The hinged end of the folding arm is provided with a special-shaped end head, the free end of the assembly arm is rotatably installed with a pin shaft, the special-shaped end head is fixedly connected to the outside of the pin shaft, the assembly arm is provided with a damping spring which causes the folding arm to swing down through its own elastic force, and the free end of the assembly arm is also provided with a baffle which presses against the lower side of the special-shaped end head to limit the swing angle of the folding arm.

9. The oil level gauge based tester according to claim 1, characterized in that: A rotation angle sensor is provided on one side of the bearing seat, and a calibration shaft rotatably connected to the bearing seat is provided on the rotation axis of the assembly arm, and one end of the calibration shaft is coaxially connected to the rotation angle sensor.

10. The oil level gauge based tester according to claim 9, characterized in that: A motor is arranged on the other side of the bearing seat, and the other end of the calibration shaft is coaxially connected to the main shaft of the motor.

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