A fully automatic rain gauge calibrator

Abstract

The application discloses a kind of full-automatic rainfall calibrator, relating to rainfall calibrator field, including box, the inside of the box is fixed with two standard containers, the bottom of the standard container is connected with water outlet hose, two water outlet hoses are respectively clamped in first peristaltic pump and second peristaltic pump, water outlet hose is connected with water supply branch pipe and water drain branch pipe by first communication pipe, the other end of two water drain branch pipes is connected with third communication pipe, the outlet of third communication pipe is connected with water outlet pipe, the other end of two water supply branch pipes is connected with second communication pipe, and the inlet of second communication pipe is connected with water supply main pipe.The application is provided with two independent standard containers in the box structure, utilizes double-shaft motor to drive two peristaltic pumps to rotate simultaneously, pours water to another standard container while water is discharged from one of standard containers, so that full-automatic rainfall calibrator can continuously carry out rainfall calibration work, and the efficiency of rainfall calibration work is improved.

Description

Technical Field

[0001] This invention relates to the field of rainfall calibrators, specifically a fully automatic rainfall calibrator. Background Technology

[0002] The fully automatic rain gauge calibrator's main function is to provide a stable, phased water supply to the tested equipment (various rain gauges) at a fixed rate and quantity, enabling automated calibration of various rain gauges, centralized data management, fully automatic calibration process, automatic data calculation, significantly improving calibration efficiency, and eliminating human error.

[0003] Existing fully automatic rain gauges typically contain a standard container with a capacity of approximately 314 ml. Water is injected into the standard container through a water inlet pipe. Once the standard container is full, the water pump is controlled to pump water out of the standard container at different rates to simulate different rainfall intensities. After the water in the standard container is drained, a standard amount of rainfall calibration is performed.

[0004] However, existing fully automatic rain gauges require a waiting period after the water in the standard container dries out during calibration. The water supply must be replenished until the container is full before the next calibration can begin. To improve accuracy, multiple calibrations are often necessary when calibrating various rain gauges. Each calibration requires waiting for the standard container to refill after it dries out, resulting in a lengthy calibration process when calibrating a large number of rain gauges. Therefore, existing fully automatic rain gauges are unable to perform continuous rain gauge calibration. Summary of the Invention

[0005] Therefore, the purpose of this invention is to provide a fully automatic rainfall calibrator to solve the technical problem that existing fully automatic rainfall calibrators are unable to continuously perform rainfall calibration.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a fully automatic rain gauge, comprising a housing, inside which two standard containers are fixed, each standard container having a water outlet hose connected to its bottom end. The two water outlet hoses are respectively inserted into a first peristaltic pump and a second peristaltic pump. The first and second peristaltic pumps face opposite directions and are respectively connected to the output shafts on both sides of a motor. The motor is used to simultaneously drive the first and second peristaltic pumps. Each water outlet hose is connected to a water supply branch pipe and a water discharge branch pipe via a first connecting pipe. The other ends of both water discharge branch pipes are connected to a third connecting pipe, the outlet of which is connected to a water outlet pipe. The other ends of both water supply branch pipes are connected to a second connecting pipe, the inlet of which is connected to a main water supply pipe. A second one-way valve, located away from the first connecting pipe, is installed inside the water discharge branch pipe, and a first one-way valve, facing the first connecting pipe, is installed inside the water supply branch pipe.

[0007] By adopting the above technical solution, two independent standard containers are set up inside the box structure. Two peristaltic pumps are driven by a dual-axis motor to rotate simultaneously. Water is discharged from one standard container while water is injected into the other standard container, enabling the fully automatic rain gauge to continuously perform rain gauge calibration, thus improving the efficiency of the rain gauge calibration work.

[0008] The invention is further configured such that: a mounting platform is fixed inside the box; a mounting bracket is fixedly connected to the mounting platform; a mounting box is fixed to one end of the mounting bracket; a collar is fitted over the standard container; the collar has an extension portion facing the mounting box; and a snap-fit ​​ear is rotatably connected to the end of the extension portion; an elastic sheet is provided in the middle of the mounting box; and a recess is provided opposite the elastic sheet; the elastic sheet is used to push the snap-fit ​​ear towards the recess; the snap-fit ​​ear can engage with the side wall of the recess; and a pressure strip is slidably connected to the mounting box; the pressure strip is used to cause the snap-fit ​​ear to rotate and disengage from the recess.

[0009] By adopting the above technical solution, the standard container can be conveniently fixed to the mounting box using the collar on the outside of the standard container. At the same time, the easy unlocking structure on the mounting box can release the locking of the snap-fit ​​ear when the pressure bar is pressed. This allows for convenient loading and unloading of the standard container in a small box space, which is beneficial for the replacement and cleaning of the standard container.

[0010] The present invention is further configured such that a partition is provided in the middle of the mounting box in the vertical direction, and a first spring is provided on both sides of the partition facing the snap-fit ​​ear. The first spring is in a compressed state when the snap-fit ​​ear extends into the mounting box, and the first spring is in a released state after the snap-fit ​​ear disengages from the recess.

[0011] By adopting the above technical solution, when the pressure strip is pressed down, the snap-fit ​​ear disengages from the recess in the mounting box. At this time, the first spring releases its elastic potential energy, causing the collar and the snap-fit ​​ear connected to the collar to slide a certain distance, so that the end of the snap-fit ​​ear is misaligned with the recess, thus preventing the snap-fit ​​ear from snapping back into contact with the recess after the pressure strip is reset.

[0012] The present invention is further configured such that a second spring is provided between the partition in the middle of the mounting box and the pressure strip, and the second spring is in a compressed state when the pressure strip contacts the locking ear.

[0013] By adopting the above technical solution, after the pressure bar is released, the second spring can release elastic potential energy to reset the pressure bar.

[0014] The present invention is further configured such that the top of the standard container is provided with a top cover, the top cover is connected to an overflow branch pipe, both of the overflow branch pipes are connected to a communicating vessel, and the outlet of the communicating vessel is connected to an overflow main pipe.

[0015] By adopting the above technical solution, the water overflowing from the standard container flows into the water tank in sequence through the overflow branch pipe, the communicating vessel, and the overflow main pipe.

[0016] The present invention is further configured such that a water tank is fixed inside the box, an inlet and an overflow outlet are provided at one end of the box, an inlet pipe is connected to the inlet inside the box, a miniature water pump is connected to the inlet pipe, the outlet of the miniature water pump is connected to the water tank, an overflow pipe is connected to the overflow outlet inside the box, the other end of the overflow pipe is connected to the top of the water tank, a water supply main pipe is connected to the bottom of the water tank, and the end of the overflow main pipe is connected to the top of the water tank.

[0017] By adopting the above technical solution, a water tank is installed inside the container, which acts as an intermediate water transfer tank, avoiding direct pumping of water into the standard container and reducing the water supply error of the peristaltic pump caused by unstable external water pressure. This enables the first and second peristaltic pumps to stably pump water into their respective connected standard containers.

[0018] The invention is further configured such that a plurality of rubber rings are arranged in the vertical direction inside the top cover, and an insert post is slidably connected inside the rubber rings, the side wall of the insert post being engraved with a scale.

[0019] By adopting the above technical solution, the depth of the insertion of the plunger into the standard container is adjusted to achieve the purpose of adjusting the capacity of the standard container, thereby ensuring that the standard amount of water output can be maintained in each test.

[0020] The present invention is further configured such that a calibration port is provided at one end of the box body, and a water outlet pipe is connected to the calibration port inside the box body.

[0021] By adopting the above technical solution, the rain gauge is calibrated by connecting the calibration port to the hose.

[0022] In summary, the present invention has the following main beneficial effects:

[0023] 1. This invention sets up two independent standard containers inside the box structure, and uses a dual-axis motor to drive two peristaltic pumps to rotate simultaneously. When one standard container is discharging water for rainfall calibration, the other standard container is simultaneously filling with water. When the water in one standard container is exhausted, the other standard container is just filled with water. At this time, the rotation direction of the motor can be switched to perform the next rainfall calibration, thereby enabling the fully automatic rainfall calibrator to continuously perform rainfall calibration.

[0024] 2. This invention uses a mounting box fixedly connected inside the box, and a collar fitted on the outer wall of the standard container is inserted into the mounting box, which facilitates the installation of the standard container. At the same time, when it is necessary to remove the standard container for inspection or cleaning, simply press down the pressure strip to easily release the lock on the standard container and quickly remove the standard container. It is not easily restricted by the small space inside the box, and it is convenient to load and unload the standard container inside the box.

[0025] 3. This invention features a sliding insert structure on a standard container with graduations. By controlling the depth of the insert into the standard container, the capacity of the standard container is adjusted to compensate for the volume of water contained in the pipe connected to the standard container. This allows for adjustment of the standard container's capacity during self-testing after installation, further reducing calibration errors of the rain gauge. Attached Figure Description

[0026] Figure 1 This is a perspective view of the present invention;

[0027] Figure 2 This is a perspective view of the present invention.

[0028] Figure 3 This is a perspective view of the interior of the housing of the present invention;

[0029] Figure 4 For the present invention Figure 3 Enlarged view of A in the middle;

[0030] Figure 5 This is another perspective view of the interior of the box according to the present invention;

[0031] Figure 6 For the present invention Figure 5 Enlarged view of B in the middle;

[0032] Figure 7 This is a top internal view of the mounting box showing the collar connection of the present invention inside the mounting box.

[0033] Figure 8 This is a top internal view of the mounting box of the present invention with the pressure strip pressed down.

[0034] Figure 9 This is an internal front view of the top cover connecting the insert at the top of the standard container of the present invention.

[0035] In the diagram: 1. Housing; 2. Side panel; 3. Observation window; 4. Overflow outlet; 5. Inlet; 6. Calibration port; 7. Water tank; 8. Inlet pipe; 9. Miniature water pump; 10. Overflow pipe; 11. Outlet pipe; 12. Mounting platform; 13. Motor; 14. First peristaltic pump; 15. Second peristaltic pump; 16. Mounting bracket; 17. Mounting box; 18. Standard container; 19. Collar; 20. Snap-fit ​​ear; 21. Pressure strip; 22. First spring; 23. Elastic sheet; 24. Second spring; 25. Outlet hose; 26. Water supply branch pipe; 27. Water supply main pipe; 28. Outlet branch pipe; 29. ​​Overflow branch pipe; 30. Overflow main pipe; 31. First connecting pipe; 32. Second connecting pipe; 33. Third connecting pipe; 34. Communicator; 35. First check valve; 36. Second check valve; 37. Top cover; 38. Insert post; 39. Rubber ring. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0037] The embodiments of the present invention will now be described.

[0038] A fully automatic rain gauge, such as Figure 1-9As shown, the device includes a housing 1. One side of the housing 1 has an observation window 3 for convenient observation of the interior. The other side is fixedly connected to a side panel 2. Opening the side panel 2 allows for easy installation, removal, or adjustment of components inside the housing 1. Inside the housing 1 are two fixed standard containers 18, each with a capacity of 341.16 ml. The bottom of each standard container 18 is connected to a water outlet hose 25. The two water outlet hoses 25 are respectively inserted into a first peristaltic pump 14 and a second peristaltic pump 15. The first peristaltic pump 14 and the second peristaltic pump 15 face opposite directions and are respectively connected to the output shafts on both sides of a motor 13. The motor 13 simultaneously drives the first peristaltic pump 14 and the second peristaltic pump 15. Specifically, when the motor 13 is working... The first peristaltic pump 14 and the second peristaltic pump 15 have opposite water delivery directions. The outlet hoses 25 are connected to the water supply branch pipe 26 and the water discharge branch pipe 28 through the first connecting pipe 31. The other end of the two water discharge branch pipes 28 is connected to the third connecting pipe 33. The outlet of the third connecting pipe 33 is connected to the outlet pipe 11. The other end of the two water supply branch pipes 26 is connected to the second connecting pipe 32. The inlet of the second connecting pipe 32 is connected to the main water supply pipe 27. The water discharge branch pipe 28 is equipped with a second check valve 36 away from the first connecting pipe 31. The water supply branch pipe 26 is equipped with a first check valve 35 facing the first connecting pipe 31. Specifically, the first connecting pipe 31, the second connecting pipe 32, and the third connecting pipe 33 are all three-way pipes used for water diversion or merging.

[0039] Please see Figure 3 , Figure 6 , Figure 7 and Figure 8 An installation platform 12 is fixed inside the housing 1. An installation bracket 16 is fixedly connected to the installation platform 12. An installation box 17 is fixed to one end of the installation bracket 16. A collar 19 is fitted over a standard container 18. The collar 19 has an extension facing the installation box 17, and a snap-fit ​​ear 20 is rotatably connected to the end of the extension. An elastic piece 23 is provided in the middle of the installation box 17, and a recess is provided opposite the elastic piece 23. The elastic piece 23 is used to push the snap-fit ​​ear 20 into the recess, and the snap-fit ​​ear 20 can engage with the side wall of the recess. Specifically, when installing the standard container 18, only the extension of the collar 19 fitted on the standard container 18 needs to be extended. Inserting the collar 19 into the connection hole of the mounting box 17, the snap-fit ​​ear 20 at the front end of the extension of the collar 19 rotates after being blocked by the elastic piece 23 and is locked in the recessed platform inside the mounting box 17. Specifically, in order to make the standard container 18 more stably installed and fixed, two collars 19 are provided on each standard container 18, and the mounting box 17 is provided with insertion holes for the extension of the collar 19 to be inserted at the positions corresponding to the two collars 19. During the process of the snap-fit ​​ear 20 passing through the insertion hole on the mounting box 17, the first spring 22 will be compressed and accumulate elastic potential energy, which prepares for the snap-fit ​​ear 20 to pop out smoothly when it disengages from the recessed platform.

[0040] Please see Figure 3 , Figure 6 , Figure 7 and Figure 8 A partition is vertically arranged in the middle of the mounting box 17, and first springs 22 facing the snap-fit ​​ears 20 are arranged on both sides of the partition. During the insertion of the snap-fit ​​ears 20 into the mounting box 17, the first springs 22 are under compression. After the snap-fit ​​ears 20 disengage from the recessed platform, the first springs 22 are in a released state. Simultaneously with the pressure strip 21 pressing down, the snap-fit ​​ears 20 disengage from the recessed platform in the mounting box 17. At this time, the first springs 22 release elastic potential energy, causing the collar 19 and the snap-fit ​​ears 20 connected to the collar 19 to slide a certain distance, thus... The end of the snap-fit ​​ear 20 is offset from the recess to prevent the snap-fit ​​ear 20 from re-engaging with the recess after the pressure strip 21 is reset. As the pressure strip 21 is pressed down, the snap-fit ​​ear 20 disengages from the recess in the mounting box 17. At this time, the first spring 22 releases its elastic potential energy to make the collar 19 and the snap-fit ​​ear 20 connected to the collar 19 slide a certain distance, so that the end of the snap-fit ​​ear 20 is offset from the recess to prevent the snap-fit ​​ear 20 from re-engaging with the recess after the pressure strip 21 is reset. After the pressure strip 21 is released, the second spring 24 can release its elastic potential energy to reset the pressure strip 21.

[0041] Please see Figure 3 , Figure 6 , Figure 7 and Figure 8 The mounting box 17 is slidably connected to a pressure strip 21. The pressure strip 21 is used to rotate the locking ear 20 away from the recess. The standard container 18 is conveniently fixed to the mounting box 17 using the collar 19 on the outside of the standard container 18. At the same time, the mounting box 17 has a convenient unlocking structure. When the pressure strip 21 is pressed, the locking ear 20 is released. Specifically, when the pressure strip 21 is pressed, the second spring 24 is compressed and accumulates elastic potential energy. The pressure strip 21 continues to slide until it contacts the locking ear 20, pushing the locking ear 20 to rotate to the locking ear 20. When the retaining ear 20 is disengaged from the recess, the elastic plate 23 will be compressed and deformed during the rotation of the retaining ear 20. When the retaining ear 20 rotates and disengages from the recess, the retaining ear 20 and the extension of the collar 19 will be pushed out a distance by the first spring 22 which is in a compressed state. However, the extension of the collar 19 will not be completely pushed out of the mounting box 17, thus preventing the standard container 18 from being ejected and falling out when the pressure strip 21 is pressed down. This allows for convenient loading and unloading of the standard container 18 in the narrow space of the box 1, which is beneficial for the replacement and cleaning of the standard container 18.

[0042] Please see Figure 6 and Figure 9The standard container 18 is equipped with a top cover 37, and an overflow branch pipe 29 is connected to the top cover 37. Both overflow branch pipes 29 are connected to the inlet of the communicating vessel 34, and the outlet of the communicating vessel 34 is connected to the overflow main pipe 30. Specifically, after the standard container 18 is filled with water, the overflowing water in the standard container 18 flows into the water tank 7 through the overflow branch pipe 29, the communicating vessel 34, and the overflow main pipe 30 in sequence. Specifically, a water flow sensor is installed in the communicating vessel 34. When the standard container 18 is filled with water, the water flow sensor in the communicating vessel 34 detects the water flow and outputs a signal that the standard container 18 is full to the control component of the motor 13. A calibration port 6 is provided at one end of the box body 1. The calibration port 6 is connected to the water outlet pipe 11 inside the box body 1. The rain gauge is calibrated by connecting a hose through the calibration port 6.

[0043] Please see Figure 6 and Figure 9 The top cover 37 has multiple rubber rings 39 arranged vertically inside. These rubber rings 39 are used for sealing, preventing water from leaking out of the standard container 18 along the outer wall of the insert 38 and the rubber rings 39. The insert 38 is slidably connected to the rubber rings 39. The side wall of the insert 38 is engraved with graduations. Specifically, the graduations on the side wall of the insert 38 indicate the volume occupied by the insert 38 within the standard container 18 when inserted a specific distance. The volume of the insert 38 inserted into the standard container is adjusted to be equal to the volume of water in the pipe from the outlet hose 25 connected to the bottom of the standard container 18 to the peristaltic pump. This ensures that the water pumped out by the peristaltic pump each time is a readily calculable value. By adjusting the depth of the insert 38 inserted into the standard container, the capacity of the standard container 18 can be adjusted, thereby ensuring that each... Each test can maintain a standard output of water. Due to the working nature of the peristaltic pump, in order to protect the water outlet hose 25 inside the peristaltic pump, the peristaltic pump needs to be disassembled and the pressure-bearing surface of the water outlet hose 25 replaced after the peristaltic pump has been working for a period of time. This is to avoid one side of the water outlet hose 25 being continuously pressurized, which would affect the service life of the water outlet hose 25. Specifically, after replacing the pressure-bearing surface of the water outlet hose 25, it is difficult to guarantee that the water outlet hose 25 is still in its original position. Therefore, it is necessary to fill the standard container 18 corresponding to the water outlet hose 25 and release it once. The distance that the insertion post 38 needs to be inserted or pulled out is determined based on the volume of water released. This ensures that the sum of the volume of water in the standard container 18 and the volume of water in the water outlet hose 25 from the bottom of the standard container 18 to the peristaltic pump is maintained at a value that is easy to calculate.

[0044] Please see Figure 3A water tank 7 is fixed inside the housing 1. One end of the housing 1 has an inlet 5 and an overflow 4. The inlet 5 is connected to an inlet pipe 8 inside the housing 1, and the inlet pipe 8 is connected to a miniature water pump 9. The outlet of the miniature water pump 9 is connected to the water tank 7. In use, the inlet 5 can be connected to an external water source via a flexible hose, eliminating the need for an external pressurized water source. The miniature water pump 9 can autonomously pump external atmospheric pressure water into the water tank 7. The water entering the water tank 7 has a short flow path to the peristaltic pump, allowing the peristaltic pump to better draw water from the water tank 7 and shortening the distance from the water source to the peristaltic pump. The overflow 4 is connected to an overflow pipe 10 inside the housing 1, and the other end of the overflow pipe 10 is connected to the water tank 7. At the top, the bottom of the water tank 7 is connected to the water supply pipe 27, and the end of the overflow pipe 30 is connected to the top of the water tank 7. Specifically, the overflow pipe 30 is parallel to the top surface of the water tank 7. Before the water tank 7 is full, it will flow out through the overflow pipe 30. The overflow pipe 30 is connected to the overflow port 4. The purpose is to prevent the water in the water tank 7 from overflowing from other pipes due to excessive water. By setting the water tank 7 in the tank body 1, the water tank 7 plays the role of transferring water in the tank body 1, avoiding the water flow from being directly pumped into the standard container 18, reducing the water supply error of the peristaltic pump caused by the unstable external water supply pressure, so that the first peristaltic pump 14 and the second peristaltic pump 15 can stably pump water into the standard container 18 they are connected to.

[0045] The working principle of this invention is as follows: A micro water pump 9 pumps water into the water tank 7. The motor 13 starts, and one of the first peristaltic pump 14 and the second peristaltic pump 15 pumps water into the standard container 18, while the other pumps water out of the standard container 18. If the standard container 18 is empty, it temporarily idles. When the standard container 18 is full, the motor 13 reverses direction. The standard container 18, previously in the water-filling state, now pumps water outwards, while the standard container 18, previously in the water-pouring state, now pumps water inwards. This process is repeated several times to ensure that all the necessary containers within the tank 1 are filled. After filling the water pipe and the hose connected to the calibration port 6 with water, fill one of the standard containers 18 with water to begin the rainfall calibration work. During the rainfall calibration work, the specific flow direction of the water is as follows: one of the standard containers 18, the water outlet hose 25 in the first peristaltic pump 14, the first connecting pipe 31, the second one-way valve 36, the drain branch pipe 28, the third connecting pipe 33, and the water outlet pipe 11. When the water flows through the first connecting pipe 31, it cannot pass through the first one-way valve 35 due to the restriction of the first one-way valve 35, while the second one-way valve 36... The water flow is not restricted, so the water can pass smoothly through the second one-way valve 36. The specific flow direction of the inlet water is: water tank 7, main water supply pipe 27, second connecting pipe 32, first one-way valve 35, first connecting pipe 31, water outlet hose 25 inside the second peristaltic pump 15, and another standard container 18. When the water flows through the first connecting pipe 31, it cannot pass through the second one-way valve 36 due to the restriction of the second one-way valve 36. Specifically, when water is inlet, because the first peristaltic pump 14 is discharging water, the first connecting pipe 32 connected to the first peristaltic pump 14... When the pressure of the first connecting pipe 31 connected to the second peristaltic pump 15 is greater than the pressure of the first connecting pipe 31, there is a pressure difference between the two first check valves 35 and the first connecting pipe 31. The water will flow to the side with lower pressure. At the same time, due to the reverse suction of the second peristaltic pump 15, the water flow at the first connecting pipe 31 connected to the second peristaltic pump 15 cannot push the second check valve 36 to discharge water. Therefore, the water flows smoothly through the outlet hose 25 into the standard container 18. The same applies when the water in one of the standard containers 18 is exhausted and the motor 13 reverses.

[0046] Although embodiments of the present invention have been shown and described, these specific embodiments are merely illustrative of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A fully automatic rainfall calibrator, comprising a housing, characterized in that: Inside the housing are two standard containers, each with a water outlet hose connected to its bottom. These hoses are respectively fitted into a first peristaltic pump and a second peristaltic pump. The first and second pumps face opposite directions and are connected to the output shafts on either side of a motor, which simultaneously drives both pumps. Each water outlet hose is connected to a water supply branch pipe and a water discharge branch pipe via a first connecting pipe. The other end of each water discharge branch pipe is connected to a third connecting pipe, the outlet of which is connected to the water outlet pipe. The other end of each water supply branch pipe is connected to a second connecting pipe, the inlet of which is connected to a main water supply pipe. The water discharge branch pipe contains a device located away from the first... The second one-way valve of the connecting pipe, the first one-way valve facing the first connecting pipe is provided in the water supply branch pipe, the top of the standard container is provided with a top cover, the top cover is connected to an overflow branch pipe, both overflow branch pipes are connected to a communicating vessel, the outlet of the communicating vessel is connected to an overflow main pipe, a water tank is fixed inside the box, one end of the box is provided with a water inlet and an overflow outlet, the water inlet is connected to a water inlet pipe inside the box, the water inlet pipe is connected to a micro water pump, the outlet of the micro water pump is connected to the water tank, the overflow outlet is connected to an overflow pipe inside the box, the other end of the overflow pipe is connected to the top of the water tank, the bottom of the water tank is connected to a water supply main pipe, and the end of the overflow main pipe is connected to the top of the water tank.

2. The fully automatic rain gauge calibrator according to claim 1, characterized in that: A mounting platform is fixed inside the box, and a mounting frame is fixedly connected to the mounting platform. A mounting box is fixed to one end of the mounting frame. A collar is fitted over the standard container. An extension is provided on the collar facing the mounting box, and a snap-fit ​​ear is rotatably connected to the end of the extension. An elastic piece is provided in the middle of the mounting box, and a recess is provided opposite the elastic piece. The elastic piece is used to push the snap-fit ​​ear towards the recess, and the snap-fit ​​ear can engage with the side wall of the recess. A pressure strip is slidably connected to the mounting box, and the pressure strip is used to make the snap-fit ​​ear rotate and disengage from the recess.

3. The fully automatic rain gauge calibrator according to claim 2, characterized in that: A partition is provided in the middle of the mounting box in the vertical direction, and a first spring is provided on both sides of the partition facing the snap-fit ​​ear. The first spring is in a compressed state when the snap-fit ​​ear is inserted into the mounting box, and the first spring is in a released state after the snap-fit ​​ear is disengaged from the recess.

4. The fully automatic rain gauge calibrator according to claim 1, characterized in that: The top cover has multiple rubber rings arranged vertically inside, and inserts are slidably connected to the rubber rings. The side walls of the inserts are engraved with scales.

5. The fully automatic rain gauge calibrator according to claim 1, characterized in that: A calibration port is provided at one end of the box, and a water outlet pipe is connected to the calibration port inside the box.

6. The fully automatic rain gauge calibrator according to claim 3, characterized in that: A second spring is provided between the partition in the middle of the mounting box and the pressure strip. The second spring is under pressure when the pressure strip contacts the locking lug.

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