A tipping bucket rain gauge with a windproof, clog-proof, and flow-stabilizing water inlet funnel.

Abstract

A windproof, anti-clogging, and flow-stabilizing water injection funnel for a tipping bucket rain gauge belongs to the technical field of tipping bucket rain gauges. An annular flow-collecting grid is provided at the junction of the funnel shell and the inlet pipe; a windproof buffer flow-equalizing hood is installed on the central axis of the funnel shell; an annular filter screen is connected between the funnel shell and the windproof buffer flow-equalizing hood, and the annular filter screen is located above the annular flow-collecting grid; a flow-guiding plate assembly is provided on the inner wall of the inlet pipe; a flow-guiding needle is provided at the central axis of the inlet pipe, the upper half of the flow-guiding needle is connected to the vertical edge of the inner wall of the flow-guiding plate assembly, and the lower half of the flow-guiding needle extends out of the lower end of the flow-guiding plate assembly; a flow-guiding groove is provided on the circumference of the lower end of the inlet pipe. Advantages: It can inject a continuous, stable, and uniform small-diameter water flow into the tipping bucket, effectively reducing the impact fluctuations and stability of the tipping bucket caused by external wind, as well as random measurement errors, thus improving measurement accuracy and repeatability; it expands the measurement range and improves the reliability, stability, and measurement accuracy of the instrument.

Description

Technical Field

[0001] This invention relates to the field of tipping bucket rain gauge technology, and in particular to a windproof, anti-clogging, and flow-stabilizing water inlet funnel for a tipping bucket rain gauge. Background Technology

[0002] Currently, the funnel used in tipping bucket rain gauges includes a funnel shell and a drain pipe. The drain pipe is connected to the bottom of the funnel shell and is in communication with the funnel shell. Rainwater flowing into the funnel shell can flow out through the drain pipe. The flow rate and direction of the water flow are unstable, which greatly reduces the accuracy and repeatability of the tipping bucket rain gauge.

[0003] The funnel used in a tipping bucket rain gauge includes a funnel shell and a conical porous nozzle. Rainwater flows from the funnel shell to the conical porous nozzle. The flow rate and direction of the liquid flowing out of the conical porous nozzle are unstable, which greatly reduces the accuracy and repeatability of the tipping bucket rain gauge. In addition, the rain intensity it allows to pass through is relatively small, and the injection-molded cone tip is easily damaged, which reduces the reliability of the tipping bucket rain gauge.

[0004] The tipping bucket rain gauge uses a funnel consisting of a funnel shell 1 and a flat-mouthed drain pipe 2. The drain pipe 2 is connected to the bottom of the funnel shell 1 and is connected to the funnel shell 1. Rainwater flowing into the funnel shell 1 can flow out through the drain pipe 2. Its structure is simple, but the flow velocity and direction of the water are unstable. Under light rainfall, it is difficult for precipitation to form a continuous flow. This significantly reduces the accuracy and repeatability of the tipping bucket rain gauge.

[0005] When there is rainfall, strong winds are present, and the intensity of the rain fluctuates greatly. The direction, velocity, and flow rate of the rainwater entering the funnel are all unstable. When the unstable flow of rainwater enters the measuring bucket of the rain gauge, the accuracy and repeatability of the measured rainfall are greatly reduced. Summary of the Invention

[0006] The purpose of this invention is to provide a windproof, anti-clogging, and stable-flow water inlet funnel for a tipping rain gauge, which solves the problems of inaccurate rainfall measurement, false alarms, and false measurements caused by unstable flow of rainwater being injected into the measuring tipping funnel of the rain gauge under harsh environments such as strong winds and heavy rainfall.

[0007] The technical solution of the present invention is implemented as follows: the water injection funnel includes: a funnel shell and a funnel pipe;

[0008] It also includes: a flow guide assembly, flow guide pins, annular flow manifold, windproof buffer flow equalization cover, annular filter screen, and flow guide groove;

[0009] An annular flow grid is provided at the junction of the funnel shell and the funnel tube;

[0010] A windproof buffer flow equalization hood is installed on the central axis of the funnel shell; an annular filter screen is connected between the funnel shell and the windproof buffer flow equalization hood, and the annular filter screen is located above the annular flow combiner grid.

[0011] There is a flow guide assembly on the inner wall of the drain pipe;

[0012] A guide pin is provided at the central axis of the drain pipe. The upper half of the guide pin is connected to the vertical side of the inner wall of the guide plate assembly, and the lower half of the guide pin extends out of the lower end of the guide plate assembly.

[0013] A flow guide groove is provided on the circumference of the lower end of the leak pipe.

[0014] The flow guide assembly includes: a single-layer flow guide assembly or a double-layer flow guide assembly, both of which include flow guides; the flow guides are connected to the inner wall of the drain pipe, and the ends of the flow guides point to the geometric center of the drain pipe; the bottom cone angle θ is 15-45°;

[0015] The single-layer guide vane group has no less than two guide vanes, which are evenly distributed on the inner circumference of the leak pipe;

[0016] The double-layer guide vane assembly consists of an upper guide vane and a lower guide vane, with the same number of upper and lower guide vanes, each having no fewer than two guide vanes. The upper guide vane is located at the upper end of the drain pipe, and the lower guide vane is located at the lower end of the drain pipe. The upper and lower guide vanes are evenly distributed on the inner circumference of the drain pipe in an alternating manner.

[0017] The upper part of the guide needle is cylindrical with a diameter of 1.5-3mm, and the lower part is conical; the length of the guide needle extending out of the guide plate assembly is 5-20mm; it is treated with hydrophilic processes such as electroplating, bonding or sandblasting.

[0018] The annular busbar includes: annular wall and busbar grooves; there are busbar grooves on the circumference of the annular wall; there are 3-6 busbar grooves, evenly distributed on the circumference of the annular wall; the busbar grooves are rectangular grooves, U-shaped grooves or V-shaped grooves, with a groove depth of 2-3mm and a groove width of 1.5-2.5mm.

[0019] The windproof buffer flow equalization hood includes: a cone top, a surrounding grid, flow equalization grooves, and mounting columns; there are 3-6 surrounding grids, evenly distributed on the circumference of the cone top; the flow equalization grooves are evenly distributed on the circumference of the surrounding grids; a mounting column is connected to the center of the cone top; the mounting column extends downward and connects to the flow guide needle.

[0020] The outer wall of the guide channel is provided with a notch around its circumference, and the notch is shaped as a ∧-shaped notch, a ∩-shaped notch, or a ⌒-shaped notch.

[0021] The cross-sectional area of ​​the drain pipe is 10-50 mm². 2 At that time, the maximum allowable rainfall intensity range is 20-50 mm.

[0022] Beneficial effects: Due to the adoption of the above scheme, the large-diameter steady-flow water injection funnel installed directly above the tipping bucket rain gauge support injects unstable rainwater into the windproof buffer flow equalization hood. After being buffered by the windproof buffer flow equalization hood, the rainwater flows into the annular filter screen. After being filtered by the annular filter screen, the rainwater flows through the annular confluence grid and then flows to the upper end of the guide vane assembly. At the same time, after being guided by the guide needle and the guide groove, a continuous and stable water flow is formed and flows out from the end of the guide needle and is injected into the measuring tipping bucket.

[0023] A buffer cover is used as a windproof rain-collecting device. Rainwater flows into the funnel shell through the buffer cover, and then through a filter screen, guide vanes, and guide needles to form a continuous, stable, and uniform fine-diameter water flow into the tipping bucket. This effectively reduces the impact and fluctuation of external wind on the tipping bucket's water storage body and the stability of water flow within the tipping bucket. It also effectively reduces the random measurement errors caused by the uncertainty of external wind on the rain gauge, improving the measurement accuracy and repeatability of the tipping bucket instrument. A ring-shaped filter screen is added inside the windproof rain-collecting device when the cross-sectional area of ​​the funnel pipe is 10-50 mm². 2 At the same time, the maximum rainfall intensity range allowed is 20-50 mm / min, which effectively improves the anti-clogging situation and greatly expands the maximum measurement range of the tipping bucket rain gauge, thereby improving the reliability, stability and measurement accuracy of the instrument.

[0024] To address the shortcomings of existing technologies where the water column injected into the tipping bucket by the water funnel is extremely large and the water flow direction is uncertain, causing significant surges in the metering tipping bucket, leading to premature or delayed tipping and unstable drainage volume, resulting in large random errors, this invention creates extremely fine continuous water droplets or extremely fine continuous water columns injected into the tipping bucket during light or heavy rain. This overcomes the defect of unstable drainage volume, greatly reduces the generation of random errors, and improves the measurement accuracy and stability of the instrument.

[0025] This invention solves the problem of inaccurate rainfall measurement, false alarms, and mismeasurements caused by unstable flow of rainwater entering the measuring bucket of a rain gauge under harsh conditions such as strong winds and heavy rainfall, thus achieving the objective of this invention.

[0026] Advantages: This invention can inject a continuous, stable, and uniform small-diameter water flow into the tipping bucket, effectively reducing the impact and fluctuation of external wind on the tipping bucket's water storage body and the stability of water flow within the tipping bucket. It also effectively reduces the random measurement errors caused by the uncertainty of external wind on the rain gauge, improving the measurement accuracy and repeatability of the tipping bucket instrument. Furthermore, it greatly expands the maximum measurement range of the tipping bucket rain gauge, improving the instrument's reliability, stability, and measurement accuracy. Attached Figure Description

[0027] Figure 1 This is a structural diagram of the present invention.

[0028] Figure 2 This is a top view of the annular busbar structure of the present invention.

[0029] Figure 3 This is a top view of the single-layer guide vane assembly of the present invention.

[0030] Figure 4 This is a schematic diagram of the windproof buffer flow equalization hood structure of the present invention.

[0031] Figure 5 This is a schematic diagram of the double-layer guide vane assembly structure of the present invention.

[0032] Figure 6 This is a schematic diagram of the guide needle structure of the present invention.

[0033] Figure 7 This is a schematic diagram of the flow channel structure of the present invention.

[0034] In the diagram, 1. Funnel shell; 2. Inlet pipe; 3. Flow guide assembly; 4. Flow guide needle; 5. Annular manifold; 6. Windproof buffer flow equalization cover; 7. Annular filter screen; 8. Flow guide groove;

[0035] 3-1. Upper guide vane; 3-2. Lower guide vane; 5-1. Circular wall; 5-2. Confluence channel; 6-1. Conical top; 6-2. Enclosure; 6-3. Flow equalization channel; 6-4. Mounting column. Detailed Implementation

[0036] The technical solution of the present invention will be further described below with reference to the accompanying drawings:

[0037] Example 1: A windproof, anti-clogging, and stable water injection funnel for a tipping bucket rain gauge includes: a funnel shell 1 and a leak pipe 2; the leak pipe 2 is connected to the bottom of the funnel shell 1, and the leak pipe 2 is in communication with the funnel shell 1, so that rainwater flowing into the funnel shell 1 can flow out through the leak pipe 2.

[0038] It also includes: flow guide plate assembly 3, flow guide needle 4, annular flow grid 5, windproof buffer flow equalization cover 6, annular filter screen 7, and flow guide groove 8;

[0039] An annular flow grid 5 is provided at the junction of the funnel shell 1 and the leakage pipe 2;

[0040] A windproof buffer flow equalization hood 6 is installed on the central axis of the funnel shell 1; an annular filter screen 7 is connected between the funnel shell 1 and the windproof buffer flow equalization hood 6, and the annular filter screen 7 is located above the annular confluence grid 5.

[0041] There is a flow guide assembly 3 on the inner wall of the leak pipe 2;

[0042] A guide needle 4 is provided at the central axis position of the leak pipe 2. The upper half of the guide needle 4 is connected to the vertical side of the inner wall of the guide plate assembly 3, and the lower half of the guide needle 4 extends out of the lower end of the guide plate assembly 3.

[0043] A guide groove 8 is provided on the circumference of the lower end of the leak pipe 2.

[0044] The flow guide assembly 3 includes: a single-layer flow guide assembly or a double-layer flow guide assembly, both of which include flow guides; the flow guides are connected to the inner wall of the drain pipe 2, and the ends of the flow guides point to the geometric center of the drain pipe; the bottom cone angle θ is 15-45°;

[0045] The single-layer guide vane group has no less than two guide vanes, which are evenly distributed on the inner circumference of the drain pipe 2;

[0046] The double-layer guide vane assembly consists of an upper guide vane and a lower guide vane. The upper guide vane 3-1 and the lower guide vane 3-2 have the same number of vanes, each having no fewer than two vanes. The upper guide vane 3-1 is located at the upper end of the drain pipe 2, and the lower guide vane 3-2 is located at the lower end of the drain pipe 2. The upper guide vane 3-1 and the lower guide vane 3-2 are evenly distributed on the inner circumference of the drain pipe 2.

[0047] The guide needle 4 has a cylindrical upper part with a diameter of 1.5-3mm and a pointed conical lower part; the guide needle 4 extends 5-20mm beyond the guide plate assembly 3; and it is treated with hydrophilic processes such as electroplating, bonding or sandblasting.

[0048] The annular manifold 5 includes: annular wall 5-1 and manifold grooves 5-2; there are manifold grooves 5-2 on the circumference of the annular wall 5-1; there are 3-6 manifold grooves 5-2, which are evenly distributed on the circumference of the annular wall 5-1; the groove shape of the manifold grooves 5-2 is a rectangular groove, a U-shaped groove or a V-shaped groove, with a groove depth of 2-3 mm and a groove width of 1.5-2.5 mm.

[0049] The windproof buffer flow equalization cover 6 includes: a cone top 6-1, a surrounding grid 6-2, flow equalization grooves 6-3, and mounting posts 6-4; there are 3-6 surrounding grids 6-2, which are evenly distributed on the circumference of the cone top 6-1; the flow equalization grooves 6-3 are evenly distributed on the circumference of the surrounding grid 6-2; the mounting post 6-4 is connected to the center of the cone top 6-1; the mounting post 6-4 extends downward and is connected to the flow guide needle 4.

[0050] The outer wall of the guide channel 8 is provided with a notch around its circumference, and the notch is shaped as a ∧-shaped notch, a ∩-shaped notch, or a ⌒-shaped notch.

[0051] The cross-sectional area of ​​the drain pipe 2 is 10-50 mm². 2 At that time, the maximum allowable rainfall intensity range is 20-50 mm.

Claims

1. A windproof, clog-proof, and flow-stabilizing water inlet funnel for a tipping bucket rain gauge, comprising: The funnel shell and the funnel tube; characterized in that: it further includes: a guide vane assembly, a guide needle, an annular converging grid, a windproof buffer flow equalization hood, an annular filter screen and a guide groove; An annular flow grid is provided at the junction of the funnel shell and the funnel tube; A windproof buffer flow equalization hood is installed on the central axis of the funnel shell; an annular filter screen is connected between the funnel shell and the windproof buffer flow equalization hood, and the annular filter screen is located above the annular flow combiner grid. There is a flow guide assembly on the inner wall of the drain pipe; A guide pin is provided at the central axis of the drain pipe. The upper half of the guide pin is connected to the vertical side of the inner wall of the guide plate assembly, and the lower half of the guide pin extends out of the lower end of the guide plate assembly. A flow guide groove is provided on the circumference of the lower end of the leak pipe; The windproof buffer flow equalization hood includes: a cone top, a surrounding grid, flow equalization grooves, and mounting columns; there are 3-6 surrounding grids, evenly distributed on the circumference of the cone top; the flow equalization grooves are evenly distributed on the circumference of the surrounding grids; a mounting column is connected to the center of the cone top; the mounting column extends downward and connects to the flow guide needle.

2. The windproof, anti-clogging, and flow-stabilizing water inlet funnel for a tipping bucket rain gauge according to claim 1, characterized in that: The flow guide assembly includes: a single-layer flow guide assembly or a double-layer flow guide assembly, both of which include flow guides; the flow guides are connected to the inner wall of the drain pipe, and the ends of the flow guides point to the geometric center of the drain pipe; the bottom cone angle θ is 15-45°; The single-layer guide vane group has no less than two guide vanes, which are evenly distributed on the inner circumference of the leak pipe; The double-layer guide vane assembly consists of an upper guide vane and a lower guide vane, with the same number of upper and lower guide vanes, each having no fewer than two guide vanes. The upper guide vane is located at the upper end of the drain pipe, and the lower guide vane is located at the lower end of the drain pipe. The upper and lower guide vanes are evenly distributed on the inner circumference of the drain pipe in an alternating manner.

3. The windproof, anti-clogging, and flow-stabilizing water inlet funnel for a tipping rain gauge according to claim 1, characterized in that: The upper part of the guide needle is cylindrical with a diameter of 1.5-3mm, and the lower part is conical; the length of the guide needle extending out of the guide plate assembly is 5-20mm; it is treated with hydrophilic processes such as electroplating, bonding or sandblasting.

4. The windproof, anti-clogging, and flow-stabilizing water inlet funnel for a tipping rain gauge according to claim 1, characterized in that: The annular busbar includes: annular wall and busbar grooves; there are busbar grooves on the circumference of the annular wall; there are 3-6 busbar grooves, evenly distributed on the circumference of the annular wall; the busbar grooves are rectangular grooves, U-shaped grooves or V-shaped grooves, with a groove depth of 2-3mm and a groove width of 1.5-2.5mm.

5. The windproof, anti-clogging, and flow-stabilizing water inlet funnel for a tipping rain gauge according to claim 1, characterized in that: The outer wall of the guide channel is provided with a notch around its circumference, and the notch is shaped as a ∧-shaped notch, a ∩-shaped notch, or a ⌒-shaped notch.

6. The windproof, anti-clogging, and flow-stabilizing water inlet funnel for a tipping rain gauge according to claim 1, characterized in that: The cross-sectional area of ​​the drain pipe is 10-50 mm². 2 At that time, the maximum allowable rainfall intensity range is 20-50 mm.

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