High-precision impeller flowmeter

Abstract

The utility model relates to the technical field of flow meters, in particular to a high-precision impeller flow meter. The cover plate is installed at the upper end of the base body, a detection groove is formed in the middle of the base body, a liquid inlet and a liquid outlet are formed in the two sides of the base body respectively, the liquid inlet and the liquid outlet are communicated with the detection groove respectively, an installation groove is formed in the cover plate, an impeller is installed in the detection groove of the base body, and a circuit board for detecting the rotation angle of the impeller is installed in the installation groove; through the design of the seat body and the cover plate, the liquid flowing space and the detection element are independent and separated from each other, the flow of liquid is calculated by detecting the rotation angle of the impeller, the frequency of sent signals or pulses can be set according to needs, and high-precision detection is achieved.

Description

Technical Field

[0001] This utility model relates to the field of flow meter technology, and specifically to a high-precision impeller flow meter. Background Technology

[0002] Existing flow meters are widely used in industrial fields to measure fluid flow. However, in certain specialized fields, such as the pharmaceutical industry, higher accuracy is required, but existing flow meters are not accurate enough to meet these needs.

[0003] Therefore, based on the aforementioned shortcomings of existing flow meters, improvements to existing flow meters are necessary. Utility Model Content

[0004] The purpose of this invention is to provide a high-precision impeller flow meter that addresses the shortcomings of existing technologies. This high-precision impeller flow meter solves the defects of existing flow meters, such as low accuracy.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution.

[0006] A high-precision impeller flow meter includes a base and a cover plate. The cover plate is installed on the upper end of the base. A detection groove is formed in the middle of the base. An inlet and an outlet are respectively opened on both sides of the base. The inlet and outlet are respectively connected to the detection groove. An installation groove is formed on the cover plate. An impeller is installed in the detection groove of the base. A circuit board for detecting the rotation angle of the impeller is installed in the installation groove.

[0007] Furthermore, the liquid inlet and liquid outlet are located between two adjacent external teeth of the impeller, which ensures the matching of liquid inflow and outflow.

[0008] Furthermore, the lower part of the mounting groove has a step and a receiving groove, with the edge of the circuit board placed on the step and the components of the circuit board located within the receiving groove. This makes circuit board installation more stable and faster.

[0009] Furthermore, the cover plate has wire holes on its sidewalls for threading wires to connect to the circuit board.

[0010] Furthermore, the receiving groove is located directly above the detection groove to ensure the accuracy of the detection.

[0011] Furthermore, the upper surface of the base is formed with a sealing groove, which is annularly surrounding the outside of the detection groove, and a sealing strip is embedded in the sealing groove. This increases the sealing performance and ensures detection accuracy.

[0012] Furthermore, a pin is vertically installed inside the housing, and a central hole is opened in the middle of the impeller, which is sleeved on the pin, ensuring stable installation of the impeller and thus ensuring the accuracy of the test.

[0013] Furthermore, the inlet and outlet are horizontally positioned and round, and the connection between the inlet and outlet and the detection tank is a curved guide section to ensure smooth liquid flow.

[0014] Furthermore, a magnet is installed in the central hole of the impeller, and a magnetic encoder is connected to the circuit board in the mounting slot of the cover plate. The rotation angle of the impeller is detected by the interaction between the magnetic encoder and the magnet.

[0015] Furthermore, an inductive sensor is connected to the circuit board of the mounting groove of the cover plate to directly sense the rotation angle of the impeller, thereby calculating the liquid flow rate through the outlet through a relevant algorithm.

[0016] The beneficial effects of this utility model are as follows: through the design of the base and the cover plate, the liquid flow space and the detection element are independent and separated from each other. The flow rate of the liquid is calculated by detecting the rotation angle of the impeller. The frequency of the signal or pulse can be set as needed to achieve high-precision detection. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a side view of the present invention.

[0019] Figure 3 This is a three-dimensional structural diagram of Embodiment 1 of the present utility model.

[0020] Figure 4 for Figure 1 A top-down view.

[0021] Figure 5 This is a schematic diagram of the body structure of Embodiment 2 of this utility model.

[0022] Figure 6 for Figure 5 A top-down view.

[0023] Labels and explanations:

[0024] 1. Base body, 2. Cover plate, 3. Mounting screw hole, 4. Wire hole, 5. Liquid inlet, 6. Liquid outlet, 7. Mounting groove, 8. Step, 9. Receiving groove, 10. Detection groove, 11. First impeller, 12. Second impeller, 13. Flow guide, 14. Sealing groove. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] See Figure 1 —— Figure 6This utility model discloses a high-precision impeller flow meter, comprising: a base 1 and a cover plate 2. The cover plate 2 has multiple mounting screw holes 3 and is mounted on the upper end of the base 1 by screws. A top cover is mounted on the cover plate 2. A detection groove 10 is formed in the middle of the base 1. An inlet 5 and an outlet 6 are respectively opened on both sides of the base 1. The inlet 5 and the outlet 6 are symmetrically arranged and communicate with the detection groove 10. Liquid flows into the detection groove 10 through the inlet 5 and then flows out through the outlet 6.

[0027] The cover plate 2 of this utility model is formed with a mounting groove 7. The lower part of the mounting groove 7 has a step 8 and a receiving groove 9. The edge part of the circuit board is placed on the step 8, and the components of the circuit board are located in the receiving groove 9, making the circuit board installation more convenient. The receiving groove 9 is located directly above the detection groove 10.

[0028] The upper surface of the base 1 of this utility model is formed with a sealing groove 14. The sealing groove 14 is annularly wrapped around the outside of the detection groove 10. A sealing strip is embedded in the sealing groove 14. When the cover plate 2 is fixedly connected to the base 1, the bottom of the cover plate 2 seals the top surface of the detection groove 10, so that the liquid will not overflow and the measurement accuracy is guaranteed.

[0029] The cover plate 2 of this utility model has a wire hole 4 on its side wall for the circuit board connection wires to pass through.

[0030] See Figure 3 , Figure 4 In this invention, a first impeller 11 is installed in the detection groove 10 of the base 1. The first impeller 11 has six external teeth, and the liquid inlet 5 and the liquid outlet 6 are located between two adjacent external teeth of the first impeller 11. The detection groove 10 is circular and accommodates the first impeller 11. The outermost end of the external teeth of the first impeller 11 fits tightly with the circular sidewall of the detection groove 10 to improve the detection accuracy of the product.

[0031] The base 1 of this utility model has a pin shaft installed vertically inside. The first impeller 11 has a central hole in the middle and is sleeved on the pin shaft. A bearing can be sleeved on the pin shaft. The first impeller 11 is sleeved outside the bearing, which can ensure that the first impeller 11 rotates smoothly.

[0032] The liquid inlet 5 and liquid outlet 6 of this utility model are horizontally arranged and are round holes. The bottom surface of the detection tank 10 is located at the middle height of the liquid inlet 5 and liquid outlet 6. The connection between the liquid inlet 5, liquid outlet 6 and the detection tank 10 adopts a curved guide part 13 to make the liquid flow smoother.

[0033] In this invention, the liquid enters the detection tank 10 through the inlet 5 on the left side and the guide section 13. The liquid drives the first impeller 11 to rotate clockwise and flows out through the outlet 6 on the right side.

[0034] See Figure 5 , Figure 6In this invention, a second impeller 12 is installed in the detection groove 10 of the base 1. The second impeller 12 has four external teeth, and the liquid inlet 5 and the liquid outlet 6 are located between two adjacent external teeth of the second impeller 12. The detection groove 10 is circular, and the outermost end of the external teeth of the second impeller 12 fits tightly with the circular sidewall of the detection groove 10 to improve the detection accuracy of the product.

[0035] The base 1 of this utility model has a pin shaft vertically installed inside. The second impeller 12 has a central hole in the middle and is respectively sleeved on the pin shaft. A bearing can be sleeved on the pin shaft. The second impeller 12 is sleeved outside the bearing, which can ensure that the second impeller 12 rotates smoothly.

[0036] The liquid inlet 5 and liquid outlet 6 of this utility model are horizontally arranged and are round holes. The bottom surface of the detection tank 10 is located at the middle height of the liquid inlet 5 and liquid outlet 6. The connection between the liquid inlet 5, liquid outlet 6 and the detection tank 10 adopts a curved guide part 13 to make the liquid flow smoother.

[0037] In this invention, the liquid enters the detection tank 10 through the inlet 5 on the left side and the guide section 13. The liquid drives the second impeller 12 to rotate clockwise and flows out through the outlet 6 on the right side.

[0038] The present invention can be implemented in the following ways: a magnet is installed in the center hole of the impeller, and a magnetic encoder is connected to the circuit board of the mounting groove 7 of the cover plate 2. The magnetic encoder works in conjunction with the magnet to determine the rotation angle of the gear, and then calculates the flow rate of the liquid flowing out through the outlet 6 through a relevant algorithm.

[0039] The present invention can be implemented in the following ways: an inductive sensor is connected to the circuit board of the mounting groove 7 of the cover plate 2 to directly sense the rotation angle of the outer teeth of the impeller, and then calculates the flow rate of the liquid flowing out through the outlet 6 through a relevant algorithm.

[0040] The present invention can be implemented in the following ways: combining the two methods mentioned above.

[0041] This invention calculates the flow rate by reading the rotational changes of the impeller, and then sends an analog signal or a pulse through the circuit. It has high accuracy and the error range can be controlled within 0.2%.

[0042] Of course, the above-described embodiments are merely preferred examples of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A high-precision impeller flow meter, characterized in that: It includes a base and a cover plate. The cover plate is installed on the upper end of the base. A detection groove is formed in the middle of the base. An inlet and an outlet are respectively opened on both sides of the base. The inlet and outlet are respectively connected to the detection groove. The cover plate is formed with an installation groove. An impeller is installed in the detection groove of the base. A circuit board for detecting the rotation angle of the impeller is installed in the installation groove.

2. The high-precision impeller flowmeter according to claim 1, characterized in that: The liquid inlet and liquid outlet are located between two adjacent external teeth of the impeller.

3. The high-precision impeller flowmeter according to claim 2, characterized in that: The mounting groove has a step and a receiving groove at its lower part. The edge of the circuit board is placed on the step, and the components of the circuit board are located in the receiving groove.

4. A high-precision impeller flow meter according to claim 2, characterized in that: The cover plate has wire holes on its side wall.

5. A high-precision impeller flowmeter according to claim 3, characterized in that: The receiving slot is located directly above the detection slot.

6. A high-precision impeller flowmeter according to claim 2, characterized in that: The upper surface of the seat is formed with a sealing groove, which is annularly wrapped around the outside of the detection groove, and a sealing strip is embedded in the sealing groove.

7. A high-precision impeller flowmeter according to claim 2, characterized in that: A pin is vertically installed inside the housing, and a central hole is opened in the middle of the impeller, which is sleeved on the pin.

8. A high-precision impeller flowmeter according to claim 2, characterized in that: The inlet and outlet are horizontally arranged and are circular holes. The connection between the inlet and outlet and the detection tank is a curved guide section.

9. A high-precision impeller flowmeter according to any one of claims 1-8, characterized in that: A magnet is installed in the center hole of the impeller, and a magnetic encoder is connected to the circuit board of the mounting slot of the cover plate.

10. A high-precision impeller flowmeter according to any one of claims 1-8, characterized in that: An inductive sensor is connected to the circuit board of the mounting slot of the cover plate.

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