Two-channel impeller flowmeter

Abstract

The utility model discloses a double-channel impeller flowmeter, which relates to the technical field of agricultural flowmeters, and comprises two channel cavities, each channel cavity comprises an upper cover and a lower shell which are in threaded connection, an impeller is arranged in each channel cavity, a hole for a whole body shaft to pass through is arranged in each impeller, the upper cover is provided with an upper shaft groove, and the lower cover is provided with a lower shaft groove. The upper shell is provided with an upper shaft groove, the lower shell is provided with a lower shaft groove, the full-body shaft is inserted into the upper shaft groove and the lower shaft groove in a matched mode, a plastic magnet is fixed to the axial extending portion of the impeller, and the plastic magnet is correspondingly provided with a Hall device. According to the double-channel impeller flow meter, the upper cover and the lower cover are spirally and quickly detached, so that the impeller is convenient to clean and replace, the whole body shaft is designed in a penetrating mode, liquid medicine impurities are not prone to being accumulated, the double-channel impeller flow meter is more stable and durable, the double-channel impeller structure is convenient to calibrate, and user experience is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to agricultural flowmeter technical field, concretely relates to a double channel impeller flowmeter. BACKGROUND

[0002] Flowmeter is a kind of instrument for measuring the flow rate or volume flow of fluid (liquid or gas) through a pipe or other closed passage. At present, there are impeller flowmeters and electromagnetic flowmeters applied in agricultural unmanned aerial vehicles on the market. The impeller flowmeters are basically sharp cone top impellers, and pesticide magazines or powders are easy to accumulate in the concave pits of the impeller, which can easily stick to the impeller and affect the speed. The shaft and the shell rub, causing the shaft to wear and increasing the friction, which affects the speed of the impeller and thus the accuracy of the flowmeter. The stability is poor, there is no quick plug structure, the impeller is not convenient to clean or even replace, and the pesticide magazines are easy to accumulate in the impeller shaft, which can easily stick and make the impeller unable to rotate. Because there are usually multiple water pumps on the plant protection unmanned aerial vehicle, the single-channel flowmeter can only measure the total flow of multiple pumps, but cannot measure the flow of each pump. In addition, there are double-channel electromagnetic flowmeters on the market, but in order to improve the uniformity of spraying, it is necessary to calibrate the flow of each pump, which is time-consuming and laborious, and the user experience is poor. SUMMARY

[0003] TECHNICAL PROBLEM TO BE SOLVED BY THE UTILITY MODEL

[0004] The technical problem to be solved by the utility model is to provide a double-channel impeller flowmeter, which is convenient for cleaning and replacing the impeller through the screw quick release of the upper cover and the lower shell, and the through-body shaft design makes it not easy to accumulate liquid impurities, and it is more stable and durable. The double-channel impeller structure is convenient to calibrate, which improves the user experience.

[0005] TECHNICAL SCHEME

[0006] To solve the above problems, the utility model provides the technical scheme as follows:

[0007] A double-channel impeller flowmeter, comprising two channel cavities, each channel cavity comprising a threaded upper cover and a lower shell, the channel cavity being provided with an impeller, the impeller being provided with a hole for passing through a through-body shaft, the upper cover being provided with an upper shaft slot, the lower shell being provided with a lower shaft slot, the through-body shaft being inserted into the upper shaft slot and the lower shaft slot, and a plastic magnet being fixed on the axial extension of the impeller, and a Hall device being provided corresponding to the plastic magnet.

[0008] Quick disassembly and maintenance: the upper and lower covers are connected in a screw manner, which makes the cleaning and replacement of the impeller more convenient and fast. This design reduces the maintenance time and cost, and improves the maintainability of the equipment.

[0009] Prevent impurities accumulation: The through-body shaft design effectively avoids impurities accumulation on the shaft, which not only keeps the flow channel clean but also reduces measurement errors caused by impurities accumulation, ensuring the long-term stability and accuracy of the flowmeter.

[0010] Structural stability: By inserting the through-body shaft into the upper and lower shaft grooves, the stability of the impeller installation is ensured, reducing vibration and wear during operation and prolonging the service life of the equipment.

[0011] Non-contact measurement: The axial extension of the impeller is fixed with a plastic magnet, and the corresponding Hall device is used to sense the rotation of the impeller. This way realizes non-contact flow measurement, avoiding the wear and failure that may be caused by traditional mechanical contact, while improving the accuracy and response speed of measurement.

[0012] Double-channel calibration convenience: The double-channel impeller structure design makes the calibration process more simple and convenient. Users can independently or synchronously calibrate the two channels without disassembling the equipment, greatly improving the calibration efficiency and accuracy.

[0013] As an option, an inner step is provided in the hole, and an outer step is provided on the through-body shaft to match the inner step.

[0014] Prevent axial movement: The cooperation of the inner and outer steps can effectively limit the axial movement of the through-body shaft, ensuring that the impeller does not shift axially during operation. This helps to maintain the stable rotation of the impeller, reduces unnecessary vibration, and thus improves the reliability and service life of the equipment.

[0015] Simplify the assembly process: This design simplifies the assembly process, making the installation of the through-body shaft and impeller more intuitive and simple. Workers only need to align the outer step of the through-body shaft with the inner step in the hole and insert it, reducing the possibility of assembly errors and improving production efficiency.

[0016] As an option, the inner step and the outer step are axially limited, and the steps together with the upper shaft groove axially limit the impeller.

[0017] The upper shaft groove on the upper cover further limits the axial position of the impeller. When the through-body shaft is inserted into the upper shaft groove, the edge of the upper shaft groove contacts the end of the impeller, preventing the impeller from moving upward. At the same time, the structure of the inner step and the outer step also plays a similar role, limiting the downward movement of the through-body shaft.

[0018] As an option, the two ends of the impeller in the axial direction are round.

[0019] The round head shape reduces the contact area between the impeller and the through-body shaft or other components, reducing the friction and the possibility of wear. This not only helps to maintain the accuracy of the rotational measurement of the impeller, but also reduces the maintenance requirements.

[0020] Optionally, the upper shaft groove is located in the shaft seat, which is the downwardly protruding portion of the upper cover.

[0021] The upper shaft groove in the bearing seat, together with the outer step on the shaft and the inner step in the bore, forms a multi-layered axial restraint system. This design ensures that the shaft and impeller are firmly fixed axially, preventing axial displacement caused by external vibration or fluid impact. The bearing seat, as a downward extension of the top cover, makes the entire structure more compact and integrated. This design reduces the number of independent components, simplifies the assembly process, and improves the overall structural strength and stability. By integrating the bearing seat into the top cover, additional connection points and sealing surfaces are reduced, lowering the risk of leakage and enhancing the equipment's sealing performance.

[0022] Optionally, a sealing ring is provided between the upper cover and the lower shell.

[0023] A sealing ring is installed on the contact surface between the upper cover and the lower shell, forming a tight sealing barrier. It effectively prevents fluid leakage from the gap between the two components, ensuring measurement accuracy and system integrity.

[0024] Optionally, the top cover is provided with a hand-tightening handle on the outside.

[0025] The hand-tightening handle design allows users to easily tighten or loosen the top cover without tools. This is especially important for applications requiring frequent cleaning or impeller replacement, significantly reducing maintenance time and improving work efficiency. The hand-tightening handle provides an intuitive operating method; users simply rotate the handle by hand to install and remove the top cover. This reduces operational complexity and the possibility of misoperation, making it particularly suitable for on-site maintenance personnel.

[0026] Optionally, the outer edge of the top cover is provided with circumferential teeth.

[0027] The serrated design increases friction on the outer edge of the top cover, making it easier for users to apply force when tightening or loosening it, especially when hands are wet or gloves are worn. This reduces the risk of slippage and improves operational safety and reliability. The serrated design also allows for better interaction with hand tools such as wrenches and pliers, facilitating installation or removal when greater torque is required. This is particularly useful in scenarios requiring higher force, such as in tight spaces or when facing significant thread resistance.

[0028] Optionally, a shape-adaptive control plate is engaged at the bottom of the lower shell.

[0029] The snap design enables the control board to be quickly installed to the bottom of the lower shell without using screws or other fasteners. The user only needs to align the control board with the snap groove of the lower shell, and then pushes it gently to complete the installation, thereby greatly shortening the assembly time.

[0030] Advantages

[0031] Compared with the prior art, the technical scheme has the following advantages:

[0032] In the technical scheme, the upper and lower cover spiral quick release structure facilitates cleaning and replacement of the impeller, the through-body shaft penetrating design is more difficult to accumulate liquid impurities compared with the design that a large number of impellers on the market are lifted by a conical pointed top, and the double-channel design facilitates calibration and improves user experience. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 An explosion structure diagram of the double-channel impeller flowmeter is provided for the embodiment of the utility model;

[0034] Figure 2 A sectional view of the double-channel impeller flowmeter is provided for the embodiment of the utility model;

[0035] Figure 3 A structure schematic view of the through-body shaft of the double-channel impeller flowmeter is provided for the embodiment of the utility model;

[0036] Figure 4 A structure schematic view of the upper cover of the double-channel impeller flowmeter is provided for the embodiment of the utility model;

[0037] 1, upper cover; 101, shaft seat; 102, upper shaft groove; 103, hand screw handle; 104, peripheral teeth; 2, sealing ring; 3, impeller; 301, inner step; 4, plastic magnet; 5, through-body shaft; 501, outer step; 6, lower shell; 601, threaded structure; 602, inlet; 603, lower shaft groove; 7, control board; 8, connecting line; 9, Hall device. DETAILED DESCRIPTION

[0038] In order to further understand the content of the utility model, the utility model is described in detail in combination with the drawings and the embodiments.

[0039] Embodiment 1

[0040] In combination with the drawings, Figure 1The utility model provides a double -channel impeller flowmeter, including two channel cavities, each channel cavity includes the upper cover 1 and lower shell 6 of threaded connection, and is equipped with threaded structure 601 between upper cover 1 and lower shell 6. Channel cavity is equipped with impeller 3, and the hole for passing through body axis 5 is equipped in impeller 3, and the axial extension of impeller 3 is fixed with plastic magnet 4, and plastic magnet 4 is correspondingly provided with hall device 9, and the bottom of lower shell 6 is clamped with the control panel 7 of shape adaptation. Hall device 9 is arranged on control panel 7, and control panel 7 is also connected with connecting line 8 and is provided with interface for connecting computer terminal. The front and rear sides of two lower shells 6 are equipped with inlet and outlet 602, and inlet and outlet 602 are aligned with impeller 3. The cross section of the lower extension of impeller 3 is hourglass-shaped, and the hourglass-shaped hole for circumferential limiting is arranged in plastic magnet 4. The bottom of lower shell 6 is provided with mounting hole for fixing and reinforcing rib for strengthening structural strength.

[0041] Combine with the accompanying drawings Figure 2 、 3 Upper cover 1 is provided with upper shaft groove 102, and lower shell 6 is provided with lower shaft groove 603, and body axis 5 is inserted into upper shaft groove 102 and lower shaft groove 603 in cooperation, and upper shaft groove 102 is located in shaft seat 101, and shaft seat 101 is the part that protrudes downward of upper cover 1. The top of shaft seat 101 abuts against impeller 3, and since the two ends of impeller 3 are round, the contact area is very small, so the friction is very small, which can ensure that impeller 3 rotates freely and maintains the rotation measurement accuracy of impeller 3.

[0042] The hole is provided with inner step 301, and body axis 5 is provided with outer step 501 matched with inner step 301. The upper end of body axis 5 is a reduced diameter section, and the step structure limits impeller 3 from moving downward. Inner step 301 and outer step 501 are axially limited, and the step structure and upper shaft groove 102 jointly limit impeller 3 axially.

[0043] Sealing ring 2 is arranged between upper cover 1 and lower shell 6. The inner side of the top of lower shell 6 is provided with a ring groove, and sealing ring 2 is located in the ring groove. The diameter of sealing ring 2 is greater than the height and width of the ring groove. After the upper cover 1 is screwed, the sealing ring 2 tightly contacts the ring groove and the upper cover 1, thereby enhancing the sealing performance.

[0044] Hall device 9 is located around plastic magnet 4.

[0045] Combine with the accompanying drawings Figure 4 The outer part of upper cover 1 is provided with hand screw handle 103, and hand screw handle 103 is distributed along the diameter of upper cover 1. The center of upper cover 1 is concave, forming a space for accommodating fingers. The center of hand screw handle 103 is concave, reducing the weight of upper cover 1. The outer edge of upper cover 1 is provided with peripheral teeth 104, and peripheral teeth 104 are provided in five-star structure.

[0046] Working principle:

[0047] Liquid enters the passage cavity through the inlet and outlet 602, drives the impeller 3 to rotate, the plastic magnet 4 circumferentially limited with the impeller 3 also rotates, and the Hall device 9 occurs Hall induction, measures the flow, generates an electrical signal after measurement, is transmitted to the terminal record and analysis through the connecting line 8.

[0048] The above describes the utility model and its implementation mode schematically, which is not restrictive, and the drawings shown are only one of the implementation modes of the utility model, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired thereby, without departing from the creative purpose of the utility model, similar structure modes and embodiments are not creatively designed, which shall belong to the protection scope of the utility model.

Claims

1. A dual channel impeller flowmeter characterized by, It includes two channel cavities, each channel cavity includes a threadedly connected upper cover and lower shell, the channel cavity is provided with an impeller, the impeller is provided with a hole for passing through a body shaft, the upper cover is provided with an upper shaft slot, the lower shell is provided with a lower shaft slot, the body shaft is fitted and inserted into the upper shaft slot and the lower shaft slot, a plastic magnet is fixed on the axial extension of the impeller, and a Hall device is correspondingly arranged.

2. A dual channel impeller flowmeter according to claim 1 wherein, The hole is provided with an inner step, and the body shaft is provided with an outer step matched with the inner step.

3. A dual channel impeller flowmeter according to claim 2 wherein, The inner step and the outer step are axially limited, and the steps are axially limited together with the upper shaft slot to limit the impeller.

4. A dual channel impeller flowmeter according to claim 1 wherein, The two ends of the axial direction of the impeller are round heads.

5. A dual channel impeller flowmeter according to claim 4 wherein, The upper shaft slot is located in a shaft seat, and the shaft seat is a part of the upper cover protruding downward.

6. A dual channel impeller flowmeter according to claim 1 wherein, A sealing ring is arranged between the upper cover and the lower shell.

7. A dual channel impeller flowmeter according to claim 1 wherein, An external hand screw is arranged on the upper cover.

8. A dual channel impeller flowmeter according to claim 7 wherein, A peripheral tooth is arranged on the outer edge of the upper cover.

9. A dual channel impeller flowmeter according to any one of claims 1 to 8, wherein, A control board with a shape adapted is clamped on the bottom of the lower shell.

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