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CN-224203446-U - Rainfall sensor calibrator with accurate metering

CN224203446UCN 224203446 UCN224203446 UCN 224203446UCN-224203446-U

Abstract

The utility model discloses a rainfall sensor calibrator with accurate measurement, which comprises a water container, wherein a weighing module is arranged at the bottom of the water container, a base is arranged at the bottom of the weighing module, a peristaltic pump is arranged on the base, a water delivery pipe is connected between the peristaltic pump and the water container, an output pipe is connected to the output end of the peristaltic pump, and a sealing mechanism is arranged at one end of the output pipe far away from the peristaltic pump. According to the utility model, a sealing mechanism is arranged, quantitative water is firstly injected into the water container, a peristaltic pump is started to send water into the hollow frame, the water pressure pushes up the closed disc to discharge residual liquid in the water pipe, the pumping is stopped to ensure no liquid leakage and complete the first weighing, the pumping is started again, the liquid pushes up the closed disc to flow to the rainfall sensor, the closed disc is reset and sealed after the pumping is finished, the main control board calculates accurate output through the difference value of two weighing, the influence of residual liquid is effectively avoided, and the calibration precision and reliability are improved.

Inventors

  • LI WEIXIONG
  • YU QIANXIAN
  • LI YINYAN
  • YAO YUAN
  • ZHOU YANG

Assignees

  • 广西壮族自治区气象技术装备中心
  • 沈阳新力新信息技术有限公司

Dates

Publication Date
20260505
Application Date
20250619

Claims (7)

  1. 1. The utility model provides a rainfall sensor calibrator with accurate measurement, includes water container (1), its characterized in that the bottom of water container (1) is provided with weighing module (4), the bottom of weighing module (4) is provided with base (5), be provided with peristaltic pump (6) on base (5), be connected with raceway (10) between peristaltic pump (6) and water container (1), the output of peristaltic pump (6) is connected with output tube (8), the one end that peristaltic pump (6) were kept away from to output tube (8) is provided with sealing mechanism (9), sealing mechanism (9) include: The device comprises a hollow frame (91), wherein the hollow frame (91) is fixedly connected to an output pipe (8), a fixed plate (92) is fixedly connected to the inner wall of the hollow frame (91), a guide rod (95) is slidably connected to the inner wall of the fixed plate (92), one end of the guide rod (95) is fixedly connected with a connecting disc (94), the other end of the guide rod (95) is fixedly connected with a sealing disc (96), a spring (93) is arranged between the fixed plate (92) and the connecting disc (94), and an inner ring piece (97) is arranged on the inner wall of the hollow frame (91); the top of the water container (1) is provided with a cover mechanism (2) for sealing the water container (1) and keeping normal internal pressure.
  2. 2. The accurate rainfall sensor calibrator for metering according to claim 1, wherein the outer wall of the water container (1) is provided with a shell (3), and the peristaltic pump (6) is provided with a main control board (7).
  3. 3. The accurate rainfall sensor calibrator according to claim 1, wherein one end of the water pipe (10) is connected to the input end of the peristaltic pump (6), and the other end of the water pipe (10) is connected to the bottom of the inner wall of the water container (1).
  4. 4. The precise rainfall sensor calibrator of claim 1, wherein one end of the spring (93) is fixedly connected to the connecting disc (94), and the other end of the spring (93) is fixedly connected to the fixing plate (92).
  5. 5. The accurate rainfall sensor calibrator according to claim 2, wherein the peristaltic pump (6) is of a servo motor driving type, and the main control board (7) is connected with the weighing module (4) through a data bus.
  6. 6. The accurate rainfall sensor calibrator for metering according to claim 2, wherein the output pipe (8) is detachably connected with the sealing mechanism (9), and the main control board (7) is connected with a display module.
  7. 7. The accurate rainfall sensor calibrator of claim 1, wherein the cover mechanism (2) comprises a cover body (21), a handle (22) is arranged at the top of the cover body (21), a sealing ring (23) is arranged on the side face of the cover body (21), and an air one-way valve (24) is arranged on the cover body (21).

Description

Rainfall sensor calibrator with accurate metering Technical Field The utility model relates to the technical field of rainfall sensor calibrators, in particular to a rainfall sensor calibrator with accurate measurement. Background The rain gauge needs to be calibrated during use to ensure accurate measurement. In the calibration process, the calibrator is required to output constant rainfall to the rainfall meter at a constant speed within a specified time so as to calibrate the rainfall sensor. The existing patent CN221572857U discloses an automatic calibration instrument of a rainfall sensor, in practical application, the calibration instrument is connected with the rainfall gauge through a water outlet end of a peristaltic pump, water is input into the water container, then the calibration instrument is electrified, a weighing module measures the weight data of the water container at the moment and transmits the weight data to a main control board, the weighing module is preferably a weighing sensor, the main control board controls a servo motor to drive the peristaltic pump to work through a driver, liquid is uniformly output to the rainfall gauge through a water pipe, the calibration precision is effectively improved, after a certain time, the main control board controls the servo motor through the driver to stop the operation of the peristaltic pump, meanwhile, the weighing module measures the weight data of the water container at the moment and transmits the weight data to the main control board, the main control board obtains the output water quantity of the calibration instrument according to the difference value of the weight data measured by the weighing module for two times, and the calibration data is automatically recorded through the main control board; the utility model effectively improves the calibration precision, reduces the calibration error and improves the calibration work efficiency. However, there is a problem that the liquid is easy to be ignored in the calibration process, namely, the liquid is conveyed to the rainfall meter through the water conveying pipe, the inner wall of the water conveying pipe has a fixed volume, the liquid is inevitably attached to or stays on the pipe wall when flowing through, and the liquid does not actually flow into the rainfall meter in the whole calibration process, so that the effective calibration rainfall is not counted, but the weighing module takes the weight difference of the liquid in the water container as an output quantity basis, and under the condition that the liquid is not completely discharged from the pipeline or remains partially, the weight of the attached liquid is counted into the output quantity, so that the calculated output rainfall of the main control board is larger than the volume of the liquid actually received by the rainfall meter, and finally, the calibration data is error. In view of this, we propose a rainfall sensor calibrator with accurate measurement. Disclosure of utility model Therefore, the utility model provides a rainfall sensor calibrator with accurate measurement, which solves the problems in the prior art. In order to achieve the above object, the present utility model provides the following technical solutions: According to the first aspect of the utility model, the rainfall sensor calibrator with accurate measurement comprises a water container, a weighing module is arranged at the bottom of the water container, a base is arranged at the bottom of the weighing module, a peristaltic pump is arranged on the base, a water pipe is connected between the peristaltic pump and the water container, an output end of the peristaltic pump is connected with an output pipe, one end of the output pipe, far away from the peristaltic pump, is provided with a sealing mechanism, the sealing mechanism comprises a hollow frame, the hollow frame is fixedly connected onto the output pipe, a fixed plate is fixedly connected onto the inner wall of the hollow frame, a guide rod is slidingly connected onto the inner wall of the fixed plate, one end of the guide rod is fixedly connected with a connecting disc, the other end of the guide rod is fixedly connected with a sealing disc, a spring is arranged between the fixed plate and the connecting disc, an inner ring piece is arranged on the inner wall of the hollow frame, and a cover mechanism is arranged at the top of the water container and used for sealing the water container and keeping normal internal pressure. Further, the outer wall of the water container is provided with a shell, and the peristaltic pump is provided with a main control board. Further, one end of the water delivery pipe is connected to the input end of the peristaltic pump, and the other end of the water delivery pipe is connected to the bottom of the inner wall of the water container. Further, one end of the spring is fixedly connected to the connecting disc, and the other end of the spring is fixedly connected