Novel micro metering pump

Abstract

The utility model discloses a novel trace metering pump, which comprises an electromagnetic pump valve body and an electromagnetic component matched with the electromagnetic pump valve body, a liquid inlet and a liquid outlet are respectively arranged on the electromagnetic pump valve body, a working cavity is arranged on the electromagnetic pump valve body, the liquid inlet is communicated with the working cavity through a liquid inlet inner cavity, and the liquid outlet is communicated with the working cavity through a liquid outlet inner cavity. A liquid inlet valve assembly is arranged on the liquid inlet inner cavity, a liquid outlet valve assembly is arranged on the liquid outlet cavity, a metering pump leather cavity is fixedly arranged at the end of an electromagnetic iron core of the electromagnetic assembly, the liquid inlet valve assembly comprises a liquid inlet valve body and a liquid inlet valve limiting part, and the liquid outlet valve assembly comprises a liquid outlet valve body and a liquid outlet valve limiting part. The liquid inlet valve limiting part and the liquid outlet valve limiting part are each of a plane structure, an original V-shaped one-way valve is replaced with the liquid inlet valve limiting part and the liquid outlet valve limiting part of the plane structures, flow instability caused by partial bonding cannot be generated, and meanwhile flow instability caused by the fact that air cannot be exhausted is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of urine testing, and in particular to a novel micro-metering pump. Background Art

[0002] Metering pumps use electromagnetic force to drive the movement of magnets, allowing the pump's inner chamber to operate within a limited space. This causes pressure fluctuations within the working chamber, which in turn opens and closes the inlet and outlet check valves, thereby achieving the quantitative intake and discharge of trace amounts of liquid. However, the flow rate of current new micro-metering pumps varies greatly, making it difficult to control.

[0003] For example, application number 202420162099.4 discloses a micro-metering pump that uses a one-way valve. However, due to the uneven cutout of the one-way valve, there is a probability that part of the cross-sectional area will adhere, resulting in a reduction in the amount of liquid passing through and unstable flow. In addition, the one-way valve is V-shaped. When the liquid is first drawn in, the air cannot be 100% discharged, and the remaining air is squeezed between the V-shaped one-way valve and the valve body, causing unstable flow.

[0004] Therefore, it is necessary for those skilled in the art to improve the existing novel micro-metering pump to solve the above technical problems. Utility Model Content

[0005] The main purpose of this application is to provide a new type of micro-metering pump that can stably control the flow rate.

[0006] In order to achieve the above-mentioned purpose, in the first aspect, the present application provides a novel micro-metering pump, comprising an electromagnetic pump valve body and an electromagnetic assembly matched therewith, wherein the electromagnetic pump valve body is respectively provided with a liquid inlet and a liquid outlet, and a working chamber is opened, the liquid inlet is connected to the working chamber through a liquid inlet inner cavity, the liquid outlet is connected to the working chamber through a liquid outlet inner cavity, the liquid inlet inner cavity is provided with a liquid inlet valve assembly, the liquid outlet inner cavity is provided with a liquid outlet valve assembly, and the end of the electromagnetic core of the electromagnetic assembly is fixedly provided with a metering pump bellows matched with the working chamber, The liquid inlet valve assembly includes a liquid inlet valve body, a liquid inlet valve limiting portion having one end connected to the liquid inlet valve body via a liquid inlet valve deformation connection portion and cooperating with the liquid inlet or the liquid inlet inner cavity, and the other end of the liquid inlet valve limiting portion is a free end, and the liquid outlet valve assembly includes a liquid outlet valve body, a liquid outlet valve limiting portion having one end connected to the liquid outlet valve body via a liquid outlet valve deformation connection portion and cooperating with the liquid outlet or the liquid outlet inner cavity, and the other end of the liquid outlet valve limiting portion is a free end, and both the liquid inlet valve limiting portion and the liquid outlet valve limiting portion are planar structures.

[0007] A further improvement is that a bellows cavity positioning rib is provided on the bottom surface of the working cavity, and the bellows cavity positioning rib is in a circular ring shape.

[0008] A further improvement is that the electromagnetic pump valve body includes a metering pump upper valve body and a metering pump lower valve body fixedly connected to the metering pump upper valve body, the working chamber, the liquid inlet inner cavity, and the liquid outlet inner cavity are respectively opened on the metering pump upper valve body, the liquid inlet and the liquid outlet are respectively arranged on the metering pump lower valve body, and the liquid outlet valve assembly and the liquid inlet valve assembly are arranged between the metering pump upper valve body and the metering pump lower valve body.

[0009] A further improvement is that an upper valve body sealing rib is provided between the upper valve body of the metering pump and the liquid inlet valve body, an inlet valve anti-sticking rib is provided between the lower valve body of the metering pump and the liquid inlet valve limiting portion, a lower valve body sealing rib is provided between the lower valve body of the metering pump and the liquid outlet valve body, and an outlet valve anti-sticking rib is provided between the upper valve body of the metering pump and the liquid outlet valve limiting portion.

[0010] A further improvement is that the electromagnetic assembly includes an electromagnet housing, an electromagnetic coil frame fixedly arranged in the electromagnet housing, an electromagnetic coil wound on the electromagnetic coil frame, and an electromagnet fixing seat fixedly connected to the electromagnet housing, the electromagnet core is arranged in the electromagnetic coil, and an elastic reset structure is arranged between the electromagnet core and the electromagnet fixing seat.

[0011] A further improvement is that the elastic reset structure includes a mounting cavity opened on the electromagnet core and an elastic member arranged in the mounting cavity, one end of the elastic member conflicts with the electromagnet fixing seat, and the other end thereof conflicts with the electromagnet core.

[0012] A further improvement is that the elastic member is a spring.

[0013] A further improvement is that the electromagnet housing further comprises a housing body and an electromagnet upper shell fixedly connected to the housing body, and the electromagnet fixing seat is threadedly connected to the electromagnet upper shell.

[0014] A further improvement is that the upper shell of the electromagnet is provided with a power cord port for the power cord to pass through, one end of the power cord is connected to the electromagnetic coil, and the other end of the power cord is provided with a power interface.

[0015] A further improvement is that the end of the electromagnetic core has a T-shaped connecting portion fixedly connected to the bellows of the metering pump.

[0016] The utility model provides a novel micro-metering pump, which has the following beneficial effects compared with the prior art: the original V-shaped one-way valve is replaced by a planar structure of the liquid inlet valve limit and the liquid outlet valve limit, which will not cause partial adhesion and unstable flow rate, and at the same time avoid the unstable flow rate caused by the inability to discharge air. In addition, the electromagnet fixing seat and the electromagnet shell are connected by threads, so that the movement stroke of the electromagnet core and the metering pump skin cavity can be changed by adjusting the electromagnet fixing seat, and then the space of the working cavity can be changed, thereby realizing adjustable liquid flow rate, and when errors occur due to the process of the liquid inlet valve assembly and the liquid outlet valve assembly, the electromagnet fixing seat can be adjusted to compensate for them, thereby achieving stable control of the flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings that constitute part of this application are used to provide a further understanding of this application and make other features, objects and advantages of this application more apparent. The illustrative embodiment drawings of this application and their descriptions are used to explain this application and do not constitute an improper limitation of this application. In the drawings:

[0018] Figure 1 This utility model illustrates Figure 1 ;

[0019] Figure 2 It is a schematic diagram of the liquid outlet valve assembly and the liquid inlet valve assembly.

[0020] Among them: 70, electromagnetic pump valve body, 100, electromagnetic assembly, 1, metering pump lower valve body, 16, upper valve body sealing rib, 5, metering pump upper valve body, 34, working chamber, 7, outer shell body, 30, electromagnetic coil, 15, electromagnet upper shell, 19, power cord port, 20, electromagnet fixing seat, 37, electromagnetic coil frame, 42, spring, 50, electromagnet core, 64, metering pump leather cavity, 41, leather cavity positioning rib, 71, liquid outlet valve body, 26, lower valve body sealing rib, 68, liquid outlet cavity, 55, liquid outlet, 87, liquid inlet, 81, liquid inlet cavity, 91, liquid inlet valve body, 43, liquid inlet valve anti-sticking rib, 47, liquid inlet valve limiting part, 52, liquid inlet valve deformation connection part, 32, liquid outlet valve anti-sticking rib, 27, liquid outlet valve limiting part, 22, liquid outlet valve deformation connection part. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings 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 in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0022] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0023] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe this application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0024] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0025] Additionally, the term "plurality" shall mean two or more.

[0026] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] like Figure 1-Figure 2As shown, a new type of micro-metering pump includes an electromagnetic pump valve body 70 and an electromagnetic assembly 100 matched therewith. The electromagnetic pump valve body 70 is respectively provided with a liquid inlet 87 and a liquid outlet 55, and a working chamber 34 is opened. The liquid inlet 87 is connected to the working chamber 34 through the liquid inlet cavity 81, and the liquid outlet 55 is connected to the working chamber 34 through the liquid outlet cavity 68. The liquid inlet cavity 81 is provided with a liquid inlet valve assembly, and the liquid outlet cavity is provided with a liquid outlet valve assembly. The end of the electromagnetic core 50 of the electromagnetic assembly 100 is fixedly provided with a metering pump leather chamber 64 that matches the working chamber 34. The liquid inlet valve assembly The component includes an inlet valve body 91, an inlet valve limiting portion 47, one end of which is connected to the inlet valve body 91 through the inlet valve deformation connection portion 52 and cooperates with the liquid inlet 87 or the liquid inlet cavity 81, and the other end of the inlet valve limiting portion 47 is a free end. The liquid outlet valve assembly includes a liquid outlet valve body 71, an outlet valve limiting portion 27, one end of which is connected to the outlet valve body 71 through the outlet valve deformation connection portion 22 and cooperates with the liquid outlet 55 or the liquid outlet cavity 68, and the other end of the outlet valve limiting portion 27 is a free end. The inlet valve limiting portion 47 and the outlet valve limiting portion 27 are both planar structures.

[0028] Preferably, a bellows cavity positioning rib 41 is provided on the bottom surface of the working cavity 34 , and the bellows cavity positioning rib 41 is in a circular ring shape.

[0029] A further improvement is that the electromagnetic pump valve body 70 includes a metering pump upper valve body 5 and a metering pump lower valve body 1 fixedly connected to the metering pump upper valve body 5, the working chamber 34, the liquid inlet inner cavity 81, and the liquid outlet inner cavity 68 are respectively opened on the metering pump upper valve body 5, the liquid inlet 87 and the liquid outlet 55 are respectively arranged on the metering pump lower valve body 1, the liquid outlet valve assembly and the liquid inlet valve assembly are arranged between the metering pump upper valve body 5 and the metering pump lower valve body 1, and the metering pump upper valve body 5 and the metering pump lower valve body 1 are preferably fixed with screws.

[0030] An upper valve body sealing rib 16 is provided between the upper valve body 5 of the metering pump and the liquid inlet valve body 91, an inlet valve anti-sticking rib 43 is provided between the lower valve body 1 of the metering pump and the liquid inlet valve limiting portion 47, a lower valve body sealing rib 26 is provided between the lower valve body 1 of the metering pump and the liquid outlet valve body 71, and a liquid outlet valve anti-sticking rib 32 is provided between the upper valve body 5 of the metering pump and the liquid outlet valve limiting portion 2.

[0031] Preferably, the electromagnetic assembly 100 includes an electromagnet housing, an electromagnetic coil frame 37 fixedly arranged in the electromagnet housing, an electromagnetic coil 30 wound on the electromagnetic coil frame 37, and an electromagnet fixing seat 20 fixedly connected to the electromagnet housing. The electromagnet core 50 is arranged in the electromagnetic coil 30, and an elastic reset structure is arranged between the electromagnet core 50 and the electromagnet fixing seat 20. The elastic reset structure includes an installation cavity opened on the electromagnet core 50 and an elastic member arranged in the installation cavity. One end of the elastic member conflicts with the electromagnet fixing seat 20, and the other end conflicts with the electromagnet core 50. The elastic member is a spring 42.

[0032] In this embodiment, the liquid inlet valve body 91, the liquid inlet valve limiter 47, the liquid inlet valve deformable connection part 52, the liquid outlet valve body 71, the liquid outlet valve limiter 27 and the liquid outlet valve deformable connection part 22 are all rubber parts. Specifically, when the micro-metering pump is working, the electromagnetic coil 30 is energized to generate electromagnetic force, which drives the electromagnetic core 50 and the metering pump leather chamber 64 to move. The movement of the metering pump leather chamber 64 causes the pressure in the working chamber 34 to change. The change in pressure causes the liquid to enter from the liquid inlet 87, and the liquid inlet valve limiter 47 moves to the metering pump upper valve. The electromagnetic coil 30 is discharged, the electromagnetic force disappears, the spring 42 causes the electromagnetic core 50 and the metering pump leather chamber 64 to reset, the pressure in the working chamber 34 changes, and the liquid inlet valve limit part 47 works toward the direction of the lower valve body 1 of the metering pump, and the liquid inlet valve anti-sticking rib 43 contacts the lower valve body 1 of the metering pump, forming a closed water inlet path. The liquid in the working chamber 34 pushes the liquid outlet valve limit part 27 from the liquid outlet cavity 68, causing the liquid outlet valve limit part 27 to work in the direction of the lower valve body 1 of the metering pump, and the liquid is then discharged through the liquid outlet 55, thereby completing the entire working cycle; when the micro-metering pump works next time, the bellows positioning rib 41 in the upper valve body 5 of the metering pump plays a role in preventing the liquid from sticking to the metering pump bellows 64, the upper valve body sealing rib 16 plays a role in preventing the liquid from sticking to the liquid inlet valve, and the lower valve body sealing rib 26 in the lower valve body 1 of the metering pump plays a role in preventing the liquid from sticking to the liquid outlet valve, thereby ensuring the working accuracy of the metering pump bellows 64 during each working cycle and the liquid is smoothly sucked in from the liquid inlet 87 and output to the liquid outlet 55.

[0033] In order to achieve flow regulation, the electromagnet housing also includes a housing body 7 and an electromagnet upper shell 15 fixedly connected to the housing body 7, and the electromagnet fixing seat 20 is threadedly connected to the electromagnet upper shell 15, so that the movement stroke of the electromagnet core 50 and the metering pump leather cavity 64 can be changed by adjusting the electromagnet fixing seat 20, and then the space of the working chamber 34 can be changed, thereby achieving adjustable liquid flow, and when errors occur due to the process of the liquid inlet valve assembly and the liquid outlet valve assembly, they can be compensated by adjusting the electromagnet fixing seat 20, thereby achieving stable control of the flow.

[0034] In addition, preferably, the upper shell 15 of the electromagnet is provided with a power cord port 19 for the power cord to pass through, one end of the power cord is connected to the electromagnetic coil 30, and the other end of the power cord is provided with a power interface, and the end of the electromagnet core 50 has a T-shaped connecting portion fixedly connected to the metering pump bellows 64.

[0035] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A novel micro-metering pump, comprising an electromagnetic pump valve body and an electromagnetic assembly matched therewith, wherein the electromagnetic pump valve body is respectively provided with a liquid inlet and a liquid outlet, and a working chamber is opened, the liquid inlet and the working chamber are connected through a liquid inlet inner cavity, the liquid outlet and the working chamber are connected through a liquid outlet inner cavity, the liquid inlet inner cavity is provided with a liquid inlet valve assembly, the liquid outlet inner cavity is provided with a liquid outlet valve assembly, the end of the electromagnetic core of the electromagnetic assembly is fixedly provided with a metering pump bellows that matches the working chamber, characterized in that: The liquid inlet valve assembly includes a liquid inlet valve body, a liquid inlet valve limiting portion having one end connected to the liquid inlet valve body via a liquid inlet valve deformation connection portion and cooperating with the liquid inlet or the liquid inlet inner cavity, and the other end of the liquid inlet valve limiting portion is a free end, and the liquid outlet valve assembly includes a liquid outlet valve body, a liquid outlet valve limiting portion having one end connected to the liquid outlet valve body via a liquid outlet valve deformation connection portion and cooperating with the liquid outlet or the liquid outlet inner cavity, and the other end of the liquid outlet valve limiting portion is a free end, and both the liquid inlet valve limiting portion and the liquid outlet valve limiting portion are planar structures.

2. A novel micro-metering pump according to claim 1, characterized in that: The bottom surface of the working cavity is provided with a bellows cavity positioning rib, and the bellows cavity positioning rib is in a circular ring shape.

3. A novel micro-metering pump according to claim 1, characterized in that: The electromagnetic pump valve body includes a metering pump upper valve body and a metering pump lower valve body fixedly connected to the metering pump upper valve body; the working chamber, the liquid inlet inner cavity, and the liquid outlet inner cavity are respectively opened on the metering pump upper valve body; the liquid inlet and the liquid outlet are respectively arranged on the metering pump lower valve body; the liquid outlet valve assembly and the liquid inlet valve assembly are arranged between the metering pump upper valve body and the metering pump lower valve body.

4. A novel micro-metering pump as claimed in claim 3, characterized in that: An upper valve body sealing rib is provided between the upper valve body of the metering pump and the liquid inlet valve body, an inlet valve anti-sticking rib is provided between the lower valve body of the metering pump and the liquid inlet valve limiting portion, a lower valve body sealing rib is provided between the lower valve body of the metering pump and the liquid outlet valve body, and an outlet valve anti-sticking rib is provided between the upper valve body of the metering pump and the liquid outlet valve limiting portion.

5. A novel micro-metering pump according to claim 1, characterized in that: The electromagnetic assembly includes an electromagnet housing, an electromagnetic coil frame fixedly arranged in the electromagnet housing, an electromagnetic coil wound on the electromagnetic coil frame, and an electromagnet fixing seat fixedly connected to the electromagnet housing. The electromagnet core is arranged in the electromagnetic coil, and an elastic reset structure is provided between the electromagnet core and the electromagnet fixing seat.

6. A novel micro-metering pump as claimed in claim 5, characterized in that: The elastic reset structure includes a mounting cavity provided on the electromagnet core and an elastic member arranged in the mounting cavity. One end of the elastic member contacts the electromagnet fixing seat, and the other end contacts the electromagnet core.

7. A novel micro-metering pump according to claim 6, characterized in that: The elastic member is a spring.

8. A novel micro-metering pump as claimed in claim 5, characterized in that: The electromagnet housing further comprises a housing body and an electromagnet upper shell fixedly connected to the housing body, and the electromagnet fixing seat is threadedly connected to the electromagnet upper shell.

9. A novel micro-metering pump according to claim 8, characterized in that: The upper shell of the electromagnet is provided with a power cord port for the power cord to pass through. One end of the power cord is connected to the electromagnetic coil, and the other end of the power cord is provided with a power interface.

10. A novel micro-metering pump according to claim 5, characterized in that: The end of the electromagnetic core is provided with a T-shaped connecting portion fixedly connected to the bellows of the metering pump.

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