Impeller metering device and diaphragm pump thereof

Abstract

The utility model relates to an impeller metering device and a diaphragm pump thereof, and a device for extracting flow detection signals of the diaphragm pump in fluid transmission, which is characterized by comprising an impeller metering device (20) arranged between an outlet cover plate of the diaphragm pump and a diaphragm valve component, and the impeller metering device (20) comprises a fixed support (21), an impeller (22) and an impeller mounting shaft (23) of the impeller (22); the impeller (22) comprises a plurality of blades (221) and a central through hole (222), the blades (221) are cylindrical and fixed around the central axis in an array mode, the central through hole (222) is formed in the center of the cylinder, the fixed support (21) is provided with an installation arm (211), and the impeller installation shaft (23) penetrates through the central through hole (222) and is fixed to the installation arm (211). Compared with the prior art that the impeller metering device is installed in an outlet pipeline, the space on the pump cover is used for containing the installation structure of the impeller metering device, and the beneficial effects that the installation structure is simpler, and maintenance is easier are achieved.

Description

Technical Field

[0001] The utility model relates to a micro pump device, in particular to a diaphragm pump provided with a metering device, in particular to an impeller metering device and a diaphragm pump thereof. Background Art

[0002] Micro diaphragm pumps are widely used in various precision fluid transmissions, such as fluid boosting and transmission in small household appliances such as coffee machines and soybean milk machines. In order to achieve accurate fluid volume and improve user experience, flow meters are usually installed to accurately calculate the volume of fluid outflow. The usual method is to set a flow detection function in the fluid transmission extraction pump, which is more convenient for electrical control of flow. The flow meter is generally composed of an impeller and a Hall component.

[0003] There are already micro diaphragm pumps with flow detection on the market. The detection component is set on the fluid outlet pipe. The detection component includes a Hall element, an impeller with a magnetic device, and a fixing frame for installing the impeller, which is set on the outlet pipe. This structure is not convenient for the installation of the flow detection device because the fluid pipe has a small and narrow diameter and is an integrated structure that is not conducive to disassembly and assembly. It is also not conducive to repair when the impeller is damaged or defective.

[0004] In view of the above problems, the present invention adopts the following technical solutions to improve the above problems. Summary of the invention

[0005] The purpose of the utility model is to provide an impeller metering device and a diaphragm pump thereof, and the disclosed technical solution is as follows:

[0006] An impeller metering device is mainly used for extracting flow detection signals of a diaphragm pump in fluid transmission, characterized in that it includes an impeller metering device (20) arranged between an outlet cover plate of a diaphragm pump and a membrane valve assembly, the impeller metering device (20) includes a fixed bracket (21), an impeller (22) and an impeller mounting shaft (23); the impeller (22) includes a plurality of blades (221) fixed in a cylindrical array around a central axis, and a central through hole (222) arranged at the center of the cylinder, the fixed bracket (21) is provided with a mounting arm (211), and the impeller mounting shaft (23) passes through the central through hole (222) and is fixed to the mounting arm (211); wherein the fixed bracket (21) also includes a fixing seat (212) for fixing the impeller metering device at the fluid outlet. By providing a combined structure of the mounting arm and the fixing seat, it is more convenient to install and fix the overall impeller device.

[0007] Furthermore, the plurality of blades (221) of the impeller (22) are arranged in a circular array around the central through hole (222), and the blades (221) are provided in a plurality of different thicknesses.

[0008] Furthermore, a group of blades (221) arranged opposite to each other have the same thickness.

[0009] Furthermore, the blades (221) are arranged in two pairs opposite to each other in a cross shape, wherein the thickness L of one pair of blades (221) is smaller than the thickness H of the other pair. In a preferred embodiment, the four blades of the magnetic impeller are symmetrically made with uneven thickness, two thick and two thin, so that dead points are not easily generated, and the impeller can also generate rotational motion at a lower flow rate.

[0010] Furthermore, a stabilizing boss (216) is provided on the fixing bracket (21), and a guide groove (2161) and a counterweight hole (2162) are provided on the stabilizing boss (216) to match the upper cover. The stabilizing boss (216) serves as a counterweight for the entire impeller metering device, achieving a more stable installation and fixing effect, and reducing vibration and noise generated when the impeller rotates.

[0011] The utility model also discloses a diaphragm pump with an impeller metering device, comprising a driving device (14), a diaphragm device (13), a membrane valve assembly (12) and a cover plate (11), wherein the driving device (14) is composed of a motor and an eccentric rotating structure, the diaphragm device (13) comprises a diaphragm bag (131) and a diaphragm bracket (132) for pumping fluid, the membrane valve assembly (12) comprises a valve fixing seat (121) for setting a fluid in and out of a diaphragm bag through hole, an inlet valve plate (122) and an outlet valve plate (123) for matching the fluid of the diaphragm bag (131) on the valve fixing seat, and a fluid arranged on the cover plate (11). An inlet (15) and a fluid outlet (16), characterized in that it also includes an impeller metering device (20) arranged between the outlet cover plate of the diaphragm pump and the membrane valve assembly, the impeller metering device (20) including a fixed bracket (21), an impeller (22) and its impeller mounting shaft (23); the impeller (22) includes a plurality of blades (221) fixed in a cylindrical array around a central axis, and a central through hole (222) arranged at the center of the cylinder, the fixed bracket (21) is provided with a mounting arm (211), and the impeller mounting shaft (23) passes through the central through hole (222) and is fixed to the mounting arm (211).

[0012] The fixing bracket (21) further comprises a fixing seat (212) for fixing the impeller metering device in a fluid cavity (111) provided on the inner side of the cover plate (11) near the fluid outlet (16), and further comprises a detection sensor provided on the outer side of the cover plate (11) near the fluid outlet (16). The mounting device is fixed in a cavity provided on the cover plate, so as to achieve better mounting, fixing, repair and replacement.

[0013] Furthermore, the fixing seat (212) is provided with a mounting hole (213), and the mounting hole (213) is adapted to be installed on a boss (112) provided at the inner outlet of the cover plate (11), so as to fix the impeller metering device (20) at the fluid outlet.

[0014] Furthermore, the fixing seat (212) is provided with a mounting groove (214), and the mounting groove (214) is adapted to be installed and fixed on a protrusion (113) provided at the inner outlet of the cover plate (11), so as to fix the impeller metering device (20) at the fluid outlet.

[0015] Furthermore, the fixing seat (212) is provided with a plurality of fixing bars (215), and every two fixing bars (215) are adapted to be clamped and fixed by a protrusion (113) provided at the inner outlet of the cover plate (11), so as to fix the impeller metering device (20) at the fluid outlet.

[0016] Furthermore, the plurality of blades (221) of the impeller (22) are arranged in a circular array around the central through hole (222), and the blades (221) are arranged in a plurality of different thicknesses, wherein a group of blades (221) arranged opposite to each other have the same thickness.

[0017] Furthermore, the blades (221) are arranged in two pairs opposite to each other in a cross shape, wherein the thickness L of one pair of blades (221) is smaller than the thickness H of the other pair.

[0018] According to the above technical scheme, the utility model has the following beneficial effects: the utility model provides an impeller metering device and a diaphragm pump thereof, through the space on the pump cover, for accommodating the installation structure of the impeller metering device, compared with the prior art installed in the outlet pipe, the installation is simpler in structure and easier to perform maintenance. Moreover, the magnetic impeller of the impeller metering device is set to have a non-uniform thickness. In a preferred embodiment, the four blades are set to be symmetrical, two of which are relatively thick, and the other two are relatively thin, so that the impeller is not easy to produce dead points when rotating, and the impeller can also produce rotational motion at a lower flow rate. It is particularly suitable for installation on the outlet cover plate space of the diaphragm pump, and does not need to be installed in the outlet pipe of a narrow space to ensure the sensitivity of the impeller. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional schematic diagram of the overall structure of a diaphragm pump according to the best embodiment of the utility model;

[0020] Figure 2 It is an exploded top view schematic diagram of the overall structure of the diaphragm pump of the best embodiment of the utility model;

[0021] Figure 3It is an exploded bottom view schematic diagram of the overall structure of the diaphragm pump of the best embodiment of the utility model;

[0022] Figure 4 It is a front view schematic diagram of the overall structure of the diaphragm pump of the best embodiment of the utility model;

[0023] Figure 5 It is a schematic cross-sectional view of the overall structure of the diaphragm pump of the best embodiment of the utility model;

[0024] Figure 6 A three-dimensional schematic diagram of the structure of a diaphragm pump impeller metering device according to the best embodiment of the utility model;

[0025] Figure 7 This is a schematic diagram of the structure decomposition of the diaphragm pump impeller metering device in the best embodiment of the utility model;

[0026] Figure 8 This is a schematic diagram of the impeller metering device installed on the cover plate in the best embodiment of the utility model;

[0027] Fig. 9 This is a schematic diagram of the check valve seat structure of a diaphragm pump according to the best embodiment of the utility model. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0029] like Figures 1 to 9 An impeller metering device and a diaphragm pump thereof are shown, an impeller metering device, mainly used for extracting flow detection signals of a diaphragm pump in fluid transmission, comprising an impeller metering device 20 arranged between the outlet cover plate and the membrane valve assembly of the diaphragm pump, the impeller metering device 20 comprising a fixed bracket 21, an impeller 22 and an impeller mounting shaft 23 thereof; the impeller 22 comprises a plurality of blades 221 fixed in a cylindrical array around a central axis, and a central through hole 222 arranged at the center of the cylinder, the fixed bracket 21 is provided with a mounting arm 211, and the impeller mounting shaft 23 passes through the central through hole 222 and is fixed to the mounting arm 211; wherein the fixed bracket 21 also comprises a fixing seat 212, which is used for installing and fixing the impeller metering device at the fluid outlet. By providing a combined structure of the mounting arm and the fixing seat, it is more convenient to install and fix the overall impeller device.

[0030] like Figure 6 , 7 and Fig. 9 As shown, the plurality of blades 221 of the impeller 22 are arranged in a circular array around the central through hole 222 , and the blades 221 are arranged in a plurality of different thicknesses.

[0031] like Fig. 9As shown in the figure, the blades 221 are arranged such that a group of blades 221 arranged opposite to each other have the same thickness. The blades 221 are arranged in two pairs opposite to each other in a cross shape, wherein the thickness L of one pair of blades 221 is smaller than the thickness H of the other pair. In a preferred embodiment, the four blades of the magnetic impeller are made symmetrically with uneven thickness, two thick and two thin, so that dead points are not easily generated, and the impeller can also generate rotational motion at a lower flow rate.

[0032] like Figure 6 and Figure 7 As shown in , the fixing bracket 21 is also provided with a stabilizing boss 216, and the stabilizing boss 216 is provided with a guide groove 2161 matched with the upper cover, and a counterweight hole 2162. The stabilizing boss 216 acts as a counterweight for the entire impeller metering device, achieving a more stable installation and fixing effect, and reducing the vibration and noise generated when the impeller rotates.

[0033] like Figures 1 to 5 As shown, the utility model also discloses a diaphragm pump with an impeller metering device, including a driving device 14, a diaphragm device 13, a membrane valve assembly 12 and a cover plate 11, wherein the driving device 14 is composed of a motor and an eccentric rotating structure, the diaphragm device 13 includes a diaphragm bag 131 and a diaphragm bracket 132 for pumping fluid, the membrane valve assembly 12 includes a valve fixing seat 121 for setting the fluid to enter and exit the diaphragm bag through hole, and an inlet valve plate 122 and an outlet valve plate 123 for matching the fluid of the diaphragm bag 131 are arranged on the valve fixing seat, and a fluid inlet 15 and a fluid outlet 16 are arranged on the cover plate 11, and also includes an outlet cover plate and a membrane valve assembly arranged on the diaphragm pump. The impeller metering device 20 between the components includes a fixing bracket 21, an impeller 22 and an impeller mounting shaft 23; the impeller 22 includes a plurality of blades 221 fixed in a cylindrical array around a central axis, and a central through hole 222 arranged at the center of the cylinder; the fixing bracket 21 is provided with a mounting arm 211, and the impeller mounting shaft 23 passes through the central through hole 222 and is fixed to the mounting arm 211; the fixing bracket 21 also includes a fixing seat 212, which is used for the impeller metering device to be installed and fixed in the fluid cavity 111 arranged on the inner side of the cover plate 11 near the fluid outlet 16, and also includes a detection sensor arranged on the outer side of the cover plate 11 near the fluid outlet 16. The mounting device is fixed in the cavity arranged on the cover plate to achieve better installation and fixation, as well as repair and replacement.

[0034] like Figure 6 , Figure 7 and Figure 8As shown, the fixing seat 212 is provided with a mounting hole 213, and the mounting hole 213 is adapted to be installed on the convex column 112 provided at the inner outlet of the cover plate 11, and is used to fix the impeller metering device 20 at the fluid outlet. The fixing seat 212 is provided with a mounting groove 214, and the mounting groove 214 is adapted to be installed and fixed on the convex block 113 provided at the inner outlet of the cover plate 11, and is used to fix the impeller metering device 20 at the fluid outlet. The fixing seat 212 is provided with a plurality of fixing rods 215, and every two fixing rods 215 are adapted to be clamped and fixed on the convex block 113 provided at the inner outlet of the cover plate 11, and are used to fix the impeller metering device 20 at the fluid outlet.

[0035] like Fig. 9 As shown, the impeller 22 has a plurality of blades 221 arranged in a circular array around the central through hole 222. The blades 221 are arranged in a plurality of different thicknesses, wherein a group of blades 221 arranged opposite to each other have the same thickness. The blades 221 are arranged in two pairs opposite to each other in a cross shape, wherein the thickness L of one pair of blades 221 is less than the thickness H of the other pair.

[0036] The above is one embodiment of the present utility model. In addition, it should be noted that any equivalent or simple changes made based on the structure, features and principles described in the concept of this patent are included in the protection scope of this patent.

Claims

1. An impeller metering device, characterized in that The invention comprises an impeller metering device (20) arranged between an outlet cover plate of a diaphragm pump and a membrane valve assembly, the impeller metering device (20) comprising a fixed bracket (21), an impeller (22) and an impeller mounting shaft (23); the impeller (22) comprises a plurality of blades (221) fixed in a cylindrical array around a central axis, and a central through hole (222) arranged at the center of the cylinder, the fixed bracket (21) is provided with a mounting arm (211), and the impeller mounting shaft (23) passes through the central through hole (222) and is fixed to the mounting arm (211); Wherein, the fixing bracket (21) further comprises a fixing seat (212) for installing and fixing the impeller metering device at the fluid outlet.

2. An impeller metering device according to claim 1, characterized in that The plurality of blades (221) of the impeller (22) are arranged in a circular array around the central through hole (222), and the blades (221) are arranged in a plurality of different thicknesses.

3. An impeller metering device according to claim 2, characterized in that A group of blades (221) arranged opposite to each other have the same thickness.

4. An impeller metering device according to claim 3, characterized in that The blades (221) are arranged in two pairs opposite to each other in a cross shape, wherein the thickness L of one pair of blades (221) is smaller than the thickness H of the other pair.

5. An impeller metering device according to claim 1, characterized in that A stabilizing boss (216) is also provided on the fixing bracket (21).

6. A diaphragm pump with an impeller metering device, comprising a drive device (14), a diaphragm device (13), a membrane valve assembly (12) and a cover plate (11), wherein the drive device (14) is composed of a motor and an eccentric rotating structure, and a fluid inlet (15) and a fluid outlet (16) are arranged on the cover plate (11), characterized in that It also includes an impeller metering device (20) arranged between the outlet cover plate of the diaphragm pump and the membrane valve assembly, wherein the impeller metering device (20) is configured as an impeller metering device as claimed in any one of claims 1 to 5; The fixing bracket (21) further comprises a fixing seat (212) for fixing the impeller metering device in a fluid cavity (111) arranged on the inner side of the cover plate (11) near the fluid outlet (16), and further comprises a detection sensor arranged on the outer side of the cover plate (11) near the fluid outlet (16).

7. A diaphragm pump with an impeller metering device according to claim 6, characterized in that The fixing seat (212) is provided with a mounting hole (213), and the mounting hole (213) is adapted to be installed on a boss (112) provided at the inner outlet of the cover plate (11), and is used to fix the impeller metering device (20) at the fluid outlet.

8. A diaphragm pump with an impeller metering device according to claim 6, characterized in that The fixing seat (212) is provided with a mounting groove (214), and the mounting groove (214) is adapted to be mounted and fixed on a protrusion (113) provided at the inner outlet of the cover plate (11), and is used to fix the impeller metering device (20) at the fluid outlet.

9. A diaphragm pump with an impeller metering device according to claim 8, characterized in that The fixing seat (212) is provided with a plurality of fixing bars (215), and every two fixing bars (215) are adapted to be clamped and fixed on a protrusion (113) provided at the inner outlet of the cover plate (11), so as to fix the impeller metering device (20) at the fluid outlet.

10. A diaphragm pump with an impeller metering device according to claim 6, characterized in that The plurality of blades (221) of the impeller (22) are arranged in a circular array around a central through hole (222); the blades (221) are arranged in a plurality of different thicknesses, wherein a group of blades (221) arranged opposite to each other have the same thickness; the blades (221) are arranged in two pairs opposite to each other in a cross shape, wherein a thickness L of one pair of blades (221) is smaller than a thickness H of the other pair.

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