A calibration device for a field level gauge
Through the power transmission mechanism and adjustable clamping plate structure, the liquid level gauge calibration device can achieve precise synchronous movement and multi-point calibration, which solves the problems of inconsistent measurement benchmarks and poor versatility of traditional devices, and improves calibration accuracy and ease of operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN ZHONGLIANG TESTING TECHNOLOGY CO LTD
- Filing Date
- 2025-08-20
- Publication Date
- 2026-06-19
AI Technical Summary
Traditional liquid level gauge calibration devices suffer from problems such as inconsistent measurement benchmarks, large calibration errors, poor versatility, complex operation, and easy damage to the liquid level gauge.
The movable plate is driven by a power transmission mechanism to move synchronously with the laser rangefinder and the level gauge. Combined with the adjustable clamping plate structure and rubber pad design, it ensures the consistency of the measurement reference and is adaptable to different models of level gauges.
It improved calibration accuracy, reduced errors, enhanced the versatility of the device, protected the level gauge, and simplified the operation process.
Smart Images
Figure CN224382591U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of liquid level gauge calibration technology, specifically a calibration device for on-site liquid level gauges. Background Technology
[0002] Currently, on-site level gauge calibration faces numerous challenges: traditional calibration devices often require separate adjustments to the laser rangefinder and the level gauge to be calibrated, making it difficult to ensure consistent measurement references and introducing calibration errors. Their fixed structures are often limited, typically only compatible with specific level gauge models. Different devices are needed for different sizes and models, resulting in poor versatility, increased calibration costs, and operational complexity. Most devices rely on manual adjustment of the level gauge and rangefinder height, leading to low adjustment accuracy and difficulty in precisely setting multiple calibration points, affecting the comprehensiveness and accuracy of the calibration. Furthermore, manual fixing of the level gauge can easily cause slippage or surface damage due to improper clamping force, impacting the stability of the calibration process and the lifespan of the equipment. Therefore, those skilled in the art have provided a calibration device for on-site level gauges to address the problems mentioned in the background. Utility Model Content
[0003] The purpose of this invention is to provide a calibration device for on-site liquid level gauges to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution:
[0005] A calibration device for an on-site liquid level gauge includes a liquid tank, a housing fixedly connected to the side wall of the liquid tank, a groove formed on the inner side wall of the housing, a slider slidably connected to the inner side wall of the groove, a movable plate fixedly connected to the side wall of the slider, a first fixed plate and a second fixed plate fixedly connected to the side wall of the movable plate, a laser rangefinder fixedly connected to the lower surface of the first fixed plate, and a placement groove for placing an ultrasonic liquid level gauge formed on the surface of the second fixed plate. A transmission mechanism for raising and lowering the movable plate is provided on the inner side wall of the housing. The transmission mechanism includes a bidirectional lead screw, a lead screw sleeve, a fixing component, a lower hinge component, a connecting rod, and an upper hinge component.
[0006] Furthermore, a bidirectional lead screw is rotatably connected to the inner wall of the housing. Both ends of the bidirectional lead screw are threaded with lead screw sleeves. A fixing member is fixedly connected to the surface of the lead screw sleeve, and a lower hinge member is fixedly connected to the surface of the fixing member.
[0007] Furthermore, an upper hinge is fixedly connected to the lower surface of the movable plate, and a connecting rod is hinged between the upper hinge and the lower hinge.
[0008] Furthermore, a drive motor and a reducer are fixedly connected to the outer wall of the housing. The power output end of the drive motor is fixedly connected to the input end of the reducer, and the output end of the reducer is fixedly connected to the end of the bidirectional lead screw shaft.
[0009] Furthermore, a controller is fixedly connected to the side wall of the housing, and the drive motor is electrically connected to an external power source through the controller.
[0010] Furthermore, the side wall of the placement groove is provided with a threaded groove, and a bolt rod is threadedly connected to the inner side wall of the threaded groove. One end of the bolt rod is rotatably connected to an arc-shaped clamp.
[0011] Furthermore, rubber pads are fixedly connected to both the inner wall of the arc-shaped clamp and the inner wall of the placement groove.
[0012] Furthermore, a knob is fixedly connected to one end of the bolt rod, and the surface of the knob is provided with evenly arranged anti-slip stripes.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] 1. The moving mechanism drives the movable plate to rise and fall, realizing the synchronous movement of the laser rangefinder and the level gauge to be calibrated, ensuring that the measurement reference of the two is always consistent, effectively reducing calibration errors caused by reference deviation, and improving calibration accuracy. The combination of drive motor, reducer and controller realizes the automated control of the moving plate lifting and falling, replacing manual adjustment, which not only saves manpower, but also accurately controls the lifting height, and facilitates the setting of multiple accurate calibration points.
[0015] 2. The design of the placement slot, bolt rod, and arc-shaped clamping plate can accommodate ultrasonic level gauges of different models and sizes, enhancing the versatility and applicability of the device and reducing dependence on specific models of level gauges. The rubber pad increases the friction between the level gauge and the fixed structure, preventing the level gauge from sliding, and also avoids scratching or damaging the surface of the level gauge during the fixing process, thus providing protection. The anti-slip stripe design on the knob surface makes it easy for operators to rotate and adjust, improving the convenience of operation. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of a calibration device for on-site liquid level gauges;
[0017] Figure 2 This is a schematic diagram of the internal structure of the housing in a calibration device for on-site liquid level gauges;
[0018] Figure 3 A calibration device for on-site liquid level gauges Figure 2 Enlarged view of point A in the middle;
[0019] Figure 4 This is a schematic diagram of the planar structure of a calibration device for on-site liquid level gauges placed in a slot.
[0020] In the diagram: 1. Liquid tank; 2. Housing; 3. Slide groove; 4. Slider; 5. Movable plate; 6. First fixed plate; 7. Second fixed plate; 8. Laser rangefinder; 9. Bidirectional lead screw; 10. Lead screw sleeve; 11. Fixing component; 12. Lower hinge component; 13. Connecting rod; 14. Upper hinge component; 15. Drive motor; 16. Reducer; 17. Placement slot; 18. Threaded groove; 19. Bolt rod; 20. Arc-shaped clamp; 21. Knob; 22. Rubber pad; 23. Controller. Detailed Implementation
[0021] To make the technical means, creative features, achieved objectives and effects of this utility model easier to understand, the present utility model is further described below in conjunction with specific embodiments. In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0022] Please see Figures 1-4This utility model provides an embodiment of a calibration device for an on-site liquid level gauge, comprising a liquid tank 1, a housing 2 fixedly connected to the side wall of the liquid tank 1, a groove 3 formed on the inner side wall of the housing 2, a slider 4 slidably connected to the inner side wall of the groove 3, a movable plate 5 fixedly connected to the side wall of the slider 4, a first fixed plate 6 and a second fixed plate 7 fixedly connected to the side wall of the movable plate 5, a laser rangefinder 8 fixedly connected to the lower surface of the first fixed plate 6, and a placement groove 17 for placing an ultrasonic liquid level gauge formed on the surface of the second fixed plate 7. A transmission mechanism for raising and lowering the movable plate 5 is provided on the inner side wall of the housing 2, the transmission mechanism including a bidirectional lead screw 9, a lead screw sleeve 10, a fixing member 11, a lower hinge member 12, a connecting rod 13 and an upper hinge member 14, and a bidirectional lead screw 9 rotatably connected to the inner side wall of the housing 2. The double-acting lead screw 9 has threaded connections at both ends to lead screw sleeves 10. A fixing element 11 is fixedly connected to the surface of the lead screw sleeve 10, and a lower hinge element 12 is fixedly connected to the surface of the fixing element 11. An upper hinge element 14 is fixedly connected to the lower surface of the movable plate 5. A connecting rod 13 is hinged between the upper hinge element 14 and the lower hinge element 12. A drive motor 15 and a reducer 16 are fixedly connected to the outer wall of the housing 2. The power output end of the drive motor 15 is fixedly connected to the input end of the reducer 16, and the output end of the reducer 16 is fixedly connected to the shaft end of the double-acting lead screw 9. A controller 23 is fixedly connected to the side wall of the housing 2, and the drive motor 15 is electrically connected to an external power source through the controller 23. During calibration, the controller 23 controls the start of the drive motor 15, and the power of the drive motor 15 is reduced by the reducer 16. The signal is then transmitted to the bidirectional lead screw 9, causing it to rotate. Since the threads at both ends of the bidirectional lead screw 9 are in opposite directions, the lead screw sleeves 10 at both ends will move in opposite directions under the constraint of the fixing member 11. When the lead screw sleeves 10 move, they drive the connecting rod 13 through the lower hinge member 12. The other end of the connecting rod 13 pulls or pushes the movable plate 5 through the upper hinge member 14. The movable plate 5 achieves stable lifting and lowering under the sliding cooperation of the slider 4 and the slide groove 3. When the movable plate 5 lifts and lowers, the laser rangefinder 8 below the first fixed plate 6 and the ultrasonic level gauge in the placement groove 17 move synchronously to ensure that their measurement references are consistent. At different lifting and lowering positions (i.e., different calibration points), the laser rangefinder 8 vertically measures the actual liquid level value in the liquid tank 1 from the measurement reference point, while simultaneously reading the ultrasonic level. The reading of the level gauge is used to calculate the deviation between the two values. The deviation is calculated as: deviation = reading of the ultrasonic level gauge - actual level value (reading of the laser rangefinder 8). If the deviation exceeds the allowable error (e.g., ±0.5%FS, depending on equipment requirements), adjustment is required. Otherwise, no adjustment is needed, thus completing the calibration of the level gauge. The transmission mechanism drives the movable plate 5 to rise and fall, achieving synchronous movement of the laser rangefinder 8 and the level gauge to be calibrated. This ensures that the measurement references of the two are always consistent, effectively reducing calibration errors caused by reference deviations and improving calibration accuracy. The combination of the drive motor 15, reducer 16, and controller 23 achieves automated control of the rising and falling of the movable plate 5, replacing manual adjustment. This not only saves manpower but also allows for precise control of the rising and falling height, facilitating the setting of multiple accurate calibration points.
[0023] In this embodiment, the sidewall of the placement groove 17 has a threaded groove 18, and a bolt rod 19 is threadedly connected to the inner sidewall of the threaded groove 18. One end of the bolt rod 19 is rotatably connected to an arc-shaped clamping plate 20. Rubber pads 22 are fixedly connected to both the inner sidewall of the arc-shaped clamping plate 20 and the inner sidewall of the placement groove 17. A knob 21 is fixedly connected to one end of the bolt rod 19, and the surface of the knob 21 has evenly distributed anti-slip stripes. In use, the ultrasonic level gauge to be calibrated is placed in the placement groove 17 of the second fixing plate 7. By rotating the knob 21, the bolt rod 19 is rotated in the threaded groove 18, causing the arc-shaped clamping plate 20 to move closer to the level gauge and cooperate with the placement groove 17. The inner wall clamps and fixes the ultrasonic level gauge. The rubber pad 22 increases friction and prevents damage to the level gauge surface. The structure of the placement groove 17, bolt rod 19, and arc-shaped clamp 20 can accommodate ultrasonic level gauges of different models and sizes, enhancing the versatility and applicability of the device and reducing dependence on specific level gauge models. The rubber pad 22 increases the friction between the level gauge and the fixing structure, preventing the level gauge from sliding, and also prevents scratches or damage to the level gauge surface during fixing, thus providing protection. The anti-slip stripe design on the surface of the knob 21 makes it easy for operators to rotate and adjust, improving the convenience of operation.
[0024] Liquid tank 1 is used to simulate different liquid levels in the field environment. During use, the ultrasonic level gauge to be calibrated is placed in the placement slot 17 of the second fixing plate 7. By rotating the knob 21, the bolt rod 19 is rotated in the threaded groove 18, causing the arc-shaped clamping plate 20 to move closer to the level gauge. It works in conjunction with the inner wall of the placement slot 17 to clamp and fix the ultrasonic level gauge. The rubber pad 22 can increase friction and prevent damage to the surface of the level gauge. During calibration, the controller 23 controls the drive motor 15 to start. The power of the drive motor 15 is reduced by the reducer 16 and then transmitted to the bidirectional lead screw 9, which drives the bidirectional lead screw 9 to rotate. Since the threads at both ends of the bidirectional lead screw 9 are opposite, the lead screw sleeves 10 at both ends will move in opposite directions under the constraint of the fixing part 11. When the lead screw sleeves 10 move, they drive the connecting rod through the lower hinge 12. 13 moves, and the other end of the connecting rod 13 pulls or pushes the movable plate 5 through the upper hinge 14. The movable plate 5 achieves stable lifting and lowering under the sliding cooperation of the slider 4 and the slide groove 3. When the movable plate 5 lifts and lowers, the laser rangefinder 8 below the first fixed plate 6 and the ultrasonic level gauge in the placement groove 17 move synchronously to ensure that the measurement reference of the two are consistent. At different lifting and lowering positions (i.e., different calibration points), the laser rangefinder 8 measures the actual liquid level value in the liquid tank 1 vertically from the measurement reference point, and at the same time reads the reading of the ultrasonic level gauge. The deviation between the two is calculated as follows: deviation = ultrasonic level gauge reading - actual liquid level value (laser rangefinder 8 reading). If the deviation exceeds the allowable error (e.g., ±0.5%FS, the specific value is determined according to the equipment requirements), adjustment is required. Otherwise, no adjustment is required, and the calibration of the level gauge is completed.
[0025] The transmission mechanism drives the movable plate 5 to rise and fall, realizing the synchronous movement of the laser rangefinder 8 and the level gauge to be calibrated, ensuring that the measurement reference of the two is always consistent, effectively reducing calibration errors caused by reference deviation, and improving calibration accuracy. The combination of drive motor 15, reducer 16 and controller 23 realizes the automated control of the rise and fall of the movable plate 5, replacing manual adjustment, which not only saves manpower, but also accurately controls the lifting height, and facilitates the setting of multiple precise calibration points. The structural design of the placement slot 17, bolt rod 19 and arc-shaped clamp 20 can adapt to ultrasonic level gauges of different models and sizes, enhancing the versatility and applicability of the device, reducing dependence on specific models of level gauges. The rubber pad 22 can increase the friction between the level gauge and the fixed structure, preventing the level gauge from sliding, and also avoid scratching or damaging the surface of the level gauge during the fixing process, thus playing a protective role. The anti-slip stripe design on the surface of the knob 21 makes it easy for the operator to rotate and adjust, improving the convenience of operation.
[0026] This specification describes the embodiments, but not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A calibration device for on-site liquid level gauges, characterized in that, The system includes a liquid tank (1), a housing (2) is fixedly connected to the side wall of the liquid tank (1), a sliding groove (3) is provided on the inner side wall of the housing (2), a slider (4) is slidably connected to the inner side wall of the sliding groove (3), a movable plate (5) is fixedly connected to the side wall of the slider (4), a first fixed plate (6) and a second fixed plate (7) are fixedly connected to the side wall of the movable plate (5), a laser rangefinder (8) is fixedly connected to the lower surface of the first fixed plate (6), and a placement groove (17) for placing an ultrasonic level gauge is provided on the surface of the second fixed plate (7). A transmission mechanism for raising and lowering the movable plate (5) is provided on the inner side wall of the housing (2). The transmission mechanism includes a two-way lead screw (9), a lead screw sleeve (10), a fixing member (11), a lower hinge member (12), a connecting rod (13), and an upper hinge member (14).
2. The calibration device for an on-site liquid level gauge according to claim 1, characterized in that, The inner wall of the housing (2) is rotatably connected to a two-way lead screw (9). Both ends of the two-way lead screw (9) are threadedly connected to lead screw sleeves (10). A fixing member (11) is fixedly connected to the surface of the lead screw sleeve (10). A lower hinge member (12) is fixedly connected to the surface of the fixing member (11).
3. The calibration device for an on-site liquid level gauge according to claim 1, characterized in that, The upper hinge (14) is fixedly connected to the lower surface of the movable plate (5), and a connecting rod (13) is hinged between the upper hinge (14) and the lower hinge (12).
4. The calibration device for an on-site liquid level gauge according to claim 1, characterized in that, A drive motor (15) and a reducer (16) are fixedly connected to the outer wall of the housing (2). The power output end of the drive motor (15) is fixedly connected to the input end of the reducer (16), and the output end of the reducer (16) is fixedly connected to the shaft end of the bidirectional lead screw (9).
5. A calibration device for an on-site liquid level gauge according to claim 1, characterized in that, A controller (23) is fixedly connected to the side wall of the housing (2), and the drive motor (15) is electrically connected to an external power source through the controller (23).
6. The calibration device for an on-site liquid level gauge according to claim 1, characterized in that, The placement groove (17) has a threaded groove (18) on its side wall. A bolt rod (19) is threadedly connected to the inner side wall of the threaded groove (18). One end of the bolt rod (19) is rotatably connected to an arc-shaped clamp (20).
7. A calibration device for an on-site liquid level gauge according to claim 6, characterized in that, The inner wall of the arc-shaped clamp (20) and the inner wall of the placement groove (17) are both fixedly connected with rubber pads (22).
8. A calibration device for an on-site liquid level gauge according to claim 6, characterized in that, One end of the bolt rod (19) is fixedly connected to a knob (21), and the surface of the knob (21) is provided with uniformly arranged anti-slip stripes.