A wing-shaped fan blade flow meter

Abstract

The present invention discloses an airfoil impeller flowmeter, which relates to the technical field of flowmeters, and includes a valve body, a valve cover, an impeller, an angle sensor and an elastic pressure-bearing member; the impeller is arranged in the valve body, the impeller is transmission-connected to the angle sensor, and the elastic pressure-bearing member is arranged between the edge of the impeller and the inner wall of the valve body. The impeller is transmission-connected to the angle sensor, and the fluid flows through the impeller to deflect the impeller. The angle sensor senses the deflection angle of the impeller to sense the flow rate of the fluid, and then determines the flow rate. The impeller does not rotate continuously during the measurement process, which is beneficial to reducing the energy loss generated by the impeller, thereby making the measurement more accurate; the angle sensor is connected to the valve body by bolts, and the impeller is connected to the angle sensor by a coupling, which is convenient for disassembly, thereby facilitating the replacement of the impeller.

Description

Technical Field

[0001] The invention relates to the technical field of flowmeters, and in particular to an airfoil blade flowmeter. Background Art

[0002] Liquid flowmeter is a kind of precision flow measuring instrument, which can be used with corresponding flow calculation instrument to measure the flow and total amount of liquid. Liquid flowmeter is widely used in measurement and control systems in the fields of petroleum, chemical industry, metallurgy, scientific research, etc. Liquid flowmeter equipped with sanitary joints can be used in the pharmaceutical industry. The existing liquid turbine flowmeter has continuous rotation of the fan blades during measurement, which increases energy loss, and the impeller is not convenient to disassemble and assemble. Once the impeller is damaged, the liquid turbine flowmeter needs to be replaced as a whole, which increases unnecessary losses. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides an airfoil blade flowmeter, which reduces the energy loss caused by the impeller and facilitates the disassembly and assembly of the impeller.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides an airfoil fan flowmeter, comprising a valve body, a valve cover, an impeller, an angle sensor and an elastic pressure-bearing member; the impeller is arranged in the valve body, the impeller is transmission-connected to the angle sensor, and the elastic pressure-bearing member is arranged between the edge of the impeller and the inner wall of the valve body.

[0006] Optionally, the impeller includes a blade shaft, a plurality of blades and an annular ring; one end of the plurality of blades is connected to the outer wall of the blade shaft, and the other end is connected to the inner wall of the annular ring; a limiting portion extending outward is provided on the outer wall of the annular ring, the limiting portion is connected to one end of the elastic pressure-bearing member, and one end of the blade shaft is connected to the angle sensor.

[0007] Optionally, a limiting groove is provided at one end of the valve body facing the valve cover, the impeller and the elastic pressure-bearing member are both arranged in the limiting groove, and the elastic pressure-bearing member is arranged between the limiting portion of the impeller and the side end portion of the limiting groove.

[0008] Optionally, the limiting groove includes two 90-degree fan-shaped grooves recessed inward from the end of the valve body, the two 90-degree fan-shaped grooves are evenly distributed along the circumference of the valve body, the limiting portion extends into the 90-degree fan-shaped groove, and the elastic pressure-bearing member is arranged between the 90-degree fan-shaped groove and the limiting portion.

[0009] Optionally, the limiting portion includes an extension portion extending outward along the annular ring and a clamping portion extending to one side of the extension portion, and the clamping portion is limitedly connected to the elastic pressure-bearing member.

[0010] Optionally, the fan blade shaft and the angle sensor are connected via a coupling.

[0011] Optionally, the angle between the multiple fan blades and the fan blade axis is 3 degrees.

[0012] Optionally, the fan blade is airfoil shaped.

[0013] Optionally, a rear support is provided inside the valve body, and the angle sensor is detachably provided on the rear support.

[0014] Compared with the prior art, the present invention has achieved the following technical effects:

[0015] In the airfoil blade flowmeter of the present invention, the impeller is transmission-connected with the angle sensor. The fluid flows through the impeller to deflect the impeller. The angle sensor senses the deflection angle of the impeller to sense the flow rate of the fluid and then determines the flow rate. The impeller does not rotate continuously during the measurement process, which is beneficial to reducing the energy loss caused by the impeller, thereby making the measurement more accurate. The angle sensor is connected to the valve body by bolts, and the impeller and the angle sensor are connected by a coupling, which is easy to disassemble and thus easy to replace the impeller. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of the airfoil blade flowmeter of the present invention;

[0018] Figure 2 It is a schematic diagram of the top view of the structure of the airfoil blade flowmeter of the present invention;

[0019] Figure 3 It is a schematic diagram of the lateral structure of the airfoil blade flowmeter of the present invention;

[0020] Figure 4 It is a schematic diagram of the overall cross-sectional structure of the airfoil blade flowmeter of the present invention;

[0021] Figure 5 It is a schematic diagram of the connection structure between the impeller and the angle sensor in the airfoil blade flowmeter of the present invention;

[0022] Figure 6 It is a schematic cross-sectional view of the airfoil blade flowmeter of the present invention;

[0023] Figure 7 It is a schematic diagram of the structure of the impeller in the airfoil blade flowmeter of the present invention;

[0024] Figure 8 It is a schematic cross-sectional structure diagram of the GG position of the impeller in the airfoil blade flowmeter of the present invention.

[0025] Explanation of the accompanying drawings: 1. Valve cover; 2. Valve body; 3. Display panel; 4. On / off button; 5. Shift button; 6. Display screen; 7. Impeller; 8. Angle sensor; 9. Rubber plug; 10. Rear support; 11. First flat key; 12. Second flat key; 13. First coupling; 14. Second coupling. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figures 1 to 6 As shown, this embodiment provides an airfoil fan flowmeter, including a valve body 2, a valve cover 1, an impeller 7, an angle sensor 8 and an elastic pressure-bearing member; the impeller 7 is arranged in the valve body 2, the impeller 7 is transmission-connected to the angle sensor 8, and the elastic pressure-bearing member is arranged between the edge of the impeller 7 and the inner wall of the valve body 2.

[0028] In this specific embodiment, the valve body 2 and the valve cover 1 are connected by screws.

[0029] The impeller 7 includes four blades, each of which is an airfoil. When the fluid flows through the blades, there is a pressure difference on the two side surfaces of the blades, thereby generating a rotational force. The four blades are simultaneously subjected to force to cause the impeller to rotate. The angle between adjacent blades is 90 degrees. Each blade has an angle with the flow direction of the fluid along the flow direction of the fluid. By setting the angle, the rotational force can be increased. In this embodiment, the angle is 3 degrees. One end of the blade is connected to the front end of a blade shaft, and the other end of the blade is connected to the inner wall of an annular ring. Two limiting parts are symmetrically arranged on the outer wall of the annular ring along the center. Each limiting part includes an extension part extending outward along the circumference of the annular ring and a clamping part extending to one side of the extension part.

[0030] The rear end of the fan blade shaft is connected to the first coupling 13 through the first flat key 11, and the front end of the angle sensor 8 is connected to the second coupling 14 through the second flat key 12. The first coupling 13 and the second coupling 14 are connected by bolts and nuts, so that the rotation of the fan blade can be directly transmitted to the angle sensor 8, and the disassembly and replacement of the fan blade are convenient.

[0031] When the fluid flow rate is low, the number of fan blades can be increased or the angle can be changed.

[0032] The valve body 2 is provided with a rear support 10 inside, and the angle sensor 8 is detachably provided on the rear support 10. The rear support 10 is a support frame fixed inside the valve body 2, and is used to support the angle sensor 8. A through mounting hole is provided in the middle of the rear support 10, and the angle sensor 8 is provided at the front end of the mounting hole, and a rubber plug is provided at the rear end of the mounting hole, and the rubber plug is used to reduce the contact between the fluid and the angle sensor 8, thereby reducing the erosion of the angle sensor 8.

[0033] The elastic pressure-bearing member is a coil spring.

[0034] A limiting groove is provided at one end of the valve body 2 facing the valve cover 1, and the limiting groove includes two 90-degree fan-shaped grooves recessed inward from the end of the valve body 2, and the two 90-degree fan-shaped grooves are evenly distributed along the circumference of the valve body 2. The limiting portion extends into the 90-degree fan-shaped groove, and the elastic pressure-bearing member is arranged between the 90-degree fan-shaped groove and the limiting portion.

[0035] The impeller 7 and the elastic pressure-bearing member are both arranged in the limiting groove, and the elastic pressure-bearing member is arranged between the limiting portion of the impeller 7 and the side end portion of the limiting groove.

[0036] When the fluid flows through the impeller 7, the fluid pushes the blades, causing the impeller 7 to deflect by overcoming the elastic force of the coil spring. When the elastic force of the coil spring and the thrust of the fluid reach a balance, the impeller 7 maintains a fixed position. The deflection angle of the impeller 7 is measured by the angle sensor 8, and the flow rate of the fluid can be calculated.

[0037] Furthermore, a display panel 3 is provided on the top of the airfoil blade flowmeter, and an on / off key 4, a conversion key 5 and a display screen 6 are provided on the display panel 3, and the display screen 6 is used to display the flow rate. The conversion key is used to switch between instantaneous flow and average flow display.

[0038] Since the rotation range of the impeller 7 is limited, spiral springs with different elastic coefficients can be selected according to the liquid flow rate range, so that the airfoil blade flowmeter is suitable for a larger measurement range.

[0039] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0040] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An airfoil blade flow meter, characterized in that: It includes a valve body, a valve cover, an impeller, an angle sensor and an elastic pressure-bearing member; the impeller is arranged in the valve body, the impeller is transmission-connected with the angle sensor, and the elastic pressure-bearing member is arranged between the edge of the impeller and the inner wall of the valve body; The impeller comprises a blade shaft, a plurality of blades and an annular ring; one end of the plurality of blades is connected to the outer wall of the blade shaft, and the other end is connected to the inner wall of the annular ring; a limiting portion extending outward is provided on the outer wall of the annular ring, the limiting portion is connected to one end of the elastic pressure-bearing member, and one end of the blade shaft is connected to the angle sensor; A rear support is arranged inside the valve body, and the angle sensor is detachably arranged on the rear support.

2. The airfoil blade flow meter according to claim 1, characterized in that: A limiting groove is arranged at one end of the valve body facing the valve cover, the impeller and the elastic pressure-bearing member are both arranged in the limiting groove, and the elastic pressure-bearing member is arranged between the limiting portion of the impeller and the side end of the limiting groove.

3. The airfoil blade flow meter according to claim 2, characterized in that: The limiting groove includes two 90-degree fan-shaped grooves recessed inward from the end of the valve body, the two 90-degree fan-shaped grooves are evenly distributed along the circumference of the valve body, the limiting portion extends into the 90-degree fan-shaped groove, and the elastic pressure-bearing member is arranged between the 90-degree fan-shaped groove and the limiting portion.

4. The airfoil blade flow meter according to claim 1, characterized in that: The limiting portion includes an extension portion extending outwardly along the annular ring and a clamping portion extending to one side of the extension portion, and the clamping portion is connected to the elastic pressure-bearing member in a limiting manner.

5. The airfoil blade flow meter according to claim 1, characterized in that: The fan blade shaft and the angle sensor are connected via a coupling.

6. The airfoil blade flow meter according to claim 1, characterized in that: The angle between the multiple fan blades and the fan blade axis is 3 degrees.

7. The airfoil blade flow meter according to claim 1, characterized in that: The fan blade is in the shape of an airfoil.

Images