CN115992810A - Fluid drive device and drive method - Google Patents

Abstract

The invention relates to a fluid drive device and a drive method. The fluid driving device includes: a pipeline assembly, the first part of the pipeline assembly is provided with an inlet, and the third part of the pipeline assembly is provided with an outlet; the valve assembly includes a first valve and a second valve, both of which are fixed to the pipeline assembly connection, the first valve is installed between the first part of the pipeline assembly and the second part of the pipeline assembly, and the second valve is installed between the second part of the pipeline assembly and the third part of the pipeline assembly; in the first state, the second part of the pipeline assembly can Squeezed by external force and elastically deformed, the second valve is opened and the first valve is closed; in the second state, the second part of the pipeline assembly can move in reverse when the external force disappears, the first valve is opened, the second valve is closed, and the first state Alternate with the second state. The fluid drive device does not need to specially formulate a pump cavity with a specific shape, the overall structure is relatively simple, and the manufacturing difficulty and manufacturing cost are reduced.

Description

Fluid drive device and drive method

technical field

The invention relates to the field of microfluidic technology, in particular to a fluid drive device and a drive method.

Background technique

As an important part of microfluidic systems, microfluidic drives are widely used in chemical analysis, biomedicine, tissue engineering, mechanical control, and cooling of micro-devices. The current microfluidic driving devices mainly include non-mechanical microfluidic driving devices and mechanical microfluidic driving devices, among which the mechanical microfluidic driving device is more popular because of its better stability and faster response speed. However, in the related art, many mechanical microfluidic driving devices have relatively complicated structures, and need to specially manufacture pump chambers with specific shapes, which makes the manufacturing difficulty and cost high.

Contents of the invention

Based on this, the present invention proposes a fluid driving device. The fluid driving device does not need a specially designed pump chamber with a specific shape, the overall structure is relatively simple, and the manufacturing difficulty and manufacturing cost are reduced.

Fluid drives, including:

A pipe assembly, the interior of the pipe assembly is hollow, the pipe assembly includes a first part of the pipe assembly, a second part of the pipe assembly, and a third part of the pipe assembly distributed in sequence along the length direction, and the outer end of the first part of the pipe assembly is provided There is an inflow port, and the outer end of the third part of the pipeline assembly is provided with an outflow port;

A valve assembly, the valve assembly includes a first valve and a second valve, both of the first valve and the second valve are fixedly connected to the pipeline assembly, and the first valve is installed on the first part of the pipeline assembly and Between the second part of the pipeline assembly, the second valve is installed between the second part of the pipeline assembly and the third part of the pipeline assembly;

In the first state, the second part of the pipeline assembly can be elastically deformed by being squeezed by an external force, and the pressure on the inflow side of the second valve and the pressure on the outflow side of the first valve increase, so that the the second valve is open and the first valve is closed;

In the second state, the second part of the pipeline assembly can reversely move when the external force disappears, the pressure on the outflow side of the first valve and the pressure on the inflow side of the second valve decrease, so that the first valve One valve is open, the second valve is closed, and the first state alternates with the second state.

In one of the embodiments, the first part of the pipeline assembly, the second part of the pipeline assembly and the third part of the pipeline assembly are integrated, and both the first valve and the second valve are installed on the pipeline Inside the assembly, the first valve is located where the first part of the pipeline assembly communicates with the second portion of the pipeline assembly, and the second valve is located where the second portion of the pipeline assembly communicates with the third portion of the pipeline assembly.

In one embodiment, the inlet end of the second part of the pipeline assembly is provided with at least two of the first parts of the pipeline assembly, and/or, the outlet end of the second part of the pipeline assembly is provided with at least two of the first parts of the pipeline assembly. The third part of the pipe assembly.

In one of the embodiments, the first part of the pipeline assembly, the second part of the pipeline assembly and the third part of the pipeline assembly are distributed along the length direction at intervals, the first part of the pipeline assembly and the second part of the pipeline assembly are connected through the first valve, and the second part of the pipeline assembly is connected with the third part of the pipeline assembly through the second valve.

In one of the embodiments, the first part of the pipeline assembly and the second part of the pipeline assembly are respectively detachably connected to both ends of the first valve, and the second part of the pipeline assembly and the third part of the pipeline assembly are respectively detachably connected to the two ends of the second valve.

In one of the embodiments, the first valve and the second valve both include a first housing, a second housing and a valve body, the first housing and the second housing are detachably connected, the The valve body is installed in the installation cavity defined by the first housing and the second housing, and the end of the first housing away from the second housing is provided with a first connection protruding outward. part, the end of the second shell away from the first shell is provided with a second connecting piece protruding outward, the first connecting piece and the second connecting piece are both hollow inside and connected to the The installation cavity is connected;

The first connecting piece is used for inserting into the first part of the pipeline assembly, and the second connecting piece is used for inserting into the second part of the pipeline assembly. Both the first connecting piece and the second connecting piece include To the protruding protruding portion, the radial dimension of the protruding portion decreases gradually in the direction of the length away from the valve body.

In one of the embodiments, the valve body includes a fixing part and an opening and closing part, the fixing part is clamped between the first housing and the second housing, the opening and closing part is elastic, At least a partial area of the opening and closing part can rotate relative to the fixing part;

In a natural state, the opening and closing part blocks the installation cavity; when the pressure on the inflow side increases to a preset level, the opening and closing part rotates relative to the fixing part to open the installation cavity.

In one of the embodiments, the valve body includes at least two opening and closing parts; in a natural state, the ends of the opening and closing parts away from the fixing part bear against each other to block the installation cavity ; when the pressure on the inflow side increases to a preset level, the ends of the plurality of opening and closing parts away from the fixing part are all rotated radially outward to separate.

In one embodiment, the inner diameter of the second part of the pipeline assembly is larger than the inner diameters of the first part of the pipeline assembly and the third part of the pipeline assembly.

In the above-mentioned fluid driving device, the first valve is installed between the first part of the pipeline assembly and the second part of the pipeline assembly, and the second valve is installed between the second part of the pipeline assembly and the third part of the pipeline assembly. The second part can be squeezed by an external force and elastically deformed. At this time, the second valve is opened and the first valve is closed. The fluid previously accumulated in the second part of the pipeline assembly can flow from the second part of the pipeline assembly to the third part of the pipeline assembly. Flow out from the outlet, and at the same time, the fluid flowing in from the inlet is blocked by the first valve and continuously accumulates in the first part of the pipeline assembly; in the second state, the second part of the pipeline assembly can reverse movement when the external force disappears, at this time the first When one valve is opened and the second valve is closed, the fluid previously accumulated in the first part of the pipeline assembly can flow into the second part of the pipeline assembly. When the first state and the second state are continuously switched, the fluid can intermittently flow out from the outlet. In the fluid drive device, the valve assembly and the pipeline assembly are two independent components, and the valve assembly only needs to be fixedly connected with the pipeline assembly, without the need to specially formulate a specific shape of the pump chamber as in the conventional method, so the overall structure is simpler. Manufacturing difficulty and manufacturing cost are also lower.

The present invention also proposes a fluid driving method based on the above-mentioned fluid driving device, comprising the following steps:

S10 passing fluid from the inflow port into the first part of the pipeline assembly;

S20 pressing the second part of the pipeline assembly to close the first valve and open the second valve;

S30 stop pressing the second part of the pipeline assembly to open the first valve and close the second valve;

S40 performs S20 and S30 in a cycle.

In the above-mentioned fluid-driven method, by using the above-mentioned fluid-driven device, the manufacturing difficulty and manufacturing cost of implementing the fluid-driven method are reduced.

Description of drawings

1 is a cross-sectional view of a fluid drive device in another embodiment of the present invention;

Fig. 2 is a schematic diagram of the fluid drive device in Fig. 1 being in a first state for the first time;

Fig. 3 is a schematic diagram of the fluid drive device in Fig. 1 in a second state;

Fig. 4 is a schematic diagram of the fluid drive device in Fig. 1 being in the first state again;

5 is a cross-sectional view of a fluid drive device in another embodiment of the present invention;

6 is a cross-sectional view of a fluid drive device in another embodiment of the present invention;

7 is a schematic structural view of a fluid drive device in another embodiment of the present invention;

8 is a cross-sectional view of a fluid drive device in another embodiment of the present invention;

Fig. 9 is a cross-sectional view of a fluid drive device in an embodiment of the present invention;

FIG. 10 is a partial enlarged view of A in FIG. 9 .

Reference signs:

The first part of the pipeline assembly 100, the inflow port 110;

pipe assembly second part 200;

The third part 300 of the pipeline assembly, the outflow port 310;

First valve 400, first housing 410, first connecting member 411, protruding part 4111, second housing 420, second connecting member 421, installation cavity 430, valve body 440, fixing part 441, opening and closing part 442 ;

Second valve 500.

Detailed ways

In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or Elements must have certain orientations, be constructed and operate in certain orientations, and therefore should not be construed as limitations on the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise specified limit. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first and second feature may be in direct contact with the second feature through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions are for the purpose of illustration only and are not intended to represent the only embodiment.

1 and 9, the fluid drive device provided by an embodiment of the present invention includes a pipeline assembly and a valve assembly. The interior of the pipeline assembly is hollow. Part 200 and the third part 300 of the pipe assembly, the outer end of the first part 100 of the pipe assembly is provided with an inflow port 110 for fluid to flow into the pipe assembly, and the outer end of the third part 300 of the pipe assembly is provided with an outlet for fluid to flow out of the pipe assembly 310. The valve assembly includes a first valve 400 and a second valve 500. Both the first valve 400 and the second valve 500 are fixedly connected to the pipeline assembly. The first valve 400 is installed between the first part 100 of the pipeline assembly and the second part 200 of the pipeline assembly. The second valve 500 is installed between the second part 200 of the pipe assembly and the third part 300 of the pipe assembly. Referring to Figures 1 to 4, in the first state, the second part 200 of the pipeline assembly can be elastically deformed by being squeezed by an external force, and the pressure on the inflow side of the second valve 500 and the pressure on the outflow side of the first valve 400 increase, so that the second valve 500 is opened and the first valve 400 is closed; in the second state, the second part 200 of the pipeline assembly can reversely move when the external force disappears, and the pressure on the outflow side of the first valve 400 is related to the inflow of the second valve 500 The pressure on the side decreases, so that the first valve 400 is opened, the second valve 500 is closed, and the first state and the second state appear alternately.

Referring to FIG. 2 , in the first state, the second part 200 of the pipeline assembly can be elastically deformed by being squeezed by an external force, the volume in the second part 200 of the pipeline assembly decreases, and the pressure increases, that is, the pressure on the inflow side of the second valve 500 Both the pressure and the pressure on the outflow side of the first valve 400 increase, so that the second valve 500 opens and the first valve 400 closes. The fluid previously accumulated in the second part 200 of the pipeline assembly can flow from the second part 200 of the pipeline assembly into the third part 300 of the pipeline assembly, and then flow out from the outlet 310 , while the fluid flowing in from the inlet 110 is blocked by the first valve 400 , continuously accumulates in the first part 100 of the piping assembly. In the second state, the second part 200 of the pipeline assembly can reversely move when the external force disappears, the volume in the second part 200 of the pipeline assembly increases to the original state, and the pressure decreases compared with the first state, that is, the second valve 500 The pressure on the inflow side of the first valve 400 and the pressure on the outflow side of the first valve 400 both decrease. At this time, the first valve 400 is opened and the second valve 500 is closed. The fluid previously accumulated in the first part 100 of the pipeline assembly can flow into the second pipe assembly. Section 200. By intermittently squeezing the second part 200 of the pipe assembly, the first state and the second state are continuously switched, and the fluid can intermittently flow out from the outlet 310 . In this fluid drive device, the valve assembly and the pipeline assembly are two independent components, and it is only necessary to separately manufacture the valve assembly and the pipeline assembly and connect them fixedly. There is no need to specially formulate a pump chamber of a specific shape like the conventional method. Therefore, The overall structure is simpler, and the manufacturing difficulty and manufacturing cost are also lower.

Specifically, the external force applied to the second part 200 of the pipe assembly can be realized by vibration motor, linear motor, electromagnetic drive, electrostatic drive, pneumatic drive, memory alloy drive, etc., or can also be directly pressed manually.

1 to 4, in some embodiments, the first part 100 of the pipeline assembly, the second part 200 of the pipeline assembly and the third part 300 of the pipeline assembly are integrated, and the first valve 400 and the second valve 500 are installed in the pipeline assembly Inside, the first valve 400 is located where the first part 100 of the pipe assembly communicates with the second part 200 of the pipe assembly, and the second valve 500 is located where the second part 200 of the pipe assembly communicates with the third part 300 of the pipe assembly. Specifically, a whole conduit is directly selected as the conduit assembly, and the first portion 100 of the conduit assembly, the second portion 200 of the conduit assembly, and the third portion 300 of the conduit assembly are three regions distributed sequentially along the length of the conduit. In the first state, an external force acts on the area where the second part 200 of the pipeline assembly is located, causing it to be elastically deformed radially inward; in the second state, the external force applied to the area where the second part 200 of the pipeline assembly is located disappears, and the pipeline assembly The area where the second part 200 is located is rebounded in reverse. In this embodiment, the entire pipeline assembly directly selects a conduit, so it only needs to select a conduit of a conventional size, as well as the first valve 400 and the second valve 500, and install the first valve 400 and the second valve 500 into the inside the conduit. Compared with designing and manufacturing a pump cavity with a specific shape, the number of structural components in this embodiment is small, and the shape is simple, the manufacturing difficulty is relatively low, and the manufacturing cost is relatively lower. Specifically, the first valve 400 and the second valve 500 can be interference-fitted with the catheter, or can be clamped with the catheter, or can be glued or welded with the catheter. Of course, in addition to the above-mentioned several fixing methods, other similar fixing methods The method is also available.

Preferably, in some embodiments, the pipe assembly is a hose, and the pipe assembly is in the shape of "U", "S", "O", "W" or "M" as shown in Figures 5 to 7 and similar shape extensions. Specifically, the pipe components can be made of silica gel, rubber and other materials to ensure a certain degree of elasticity and at the same time be able to bend freely to present different shapes. When the hose is selected as the pipeline component, the fluid drive device can be more easily installed in a narrow space, and can be easily stored. For example, if the fluid drive device is to be installed in some narrow spaces, it is sufficient to bend the hose and stuff it into the space.

9 to 10, in some embodiments, the first part 100 of the pipeline assembly, the second part 200 of the pipeline assembly, and the third part 300 of the pipeline assembly are distributed at intervals along their length direction, and the first part 100 of the pipeline assembly and the second part of the pipeline assembly 200 are connected through a first valve 400 , and the second part 200 of the pipeline assembly is connected with the third part 300 of the pipeline assembly through a second valve 500 . That is, the first part 100 of the pipeline assembly and the second part 200 of the pipeline assembly are respectively connected to both ends of the first valve 400 , and the second part 200 of the pipeline assembly and the third part 300 of the pipeline assembly are respectively connected to both ends of the second valve 500 . In this embodiment, the first part 100 of the pipeline assembly, the second part 200 of the pipeline assembly and the third part 300 of the pipeline assembly are three mutually independent pipelines, and the first valve 400 and the second valve 500 are placed outside the pipeline assembly. Therefore, it is only necessary to separately manufacture three pipes and two valves, and connect adjacent pipes through corresponding valves. Since the valves are placed outside the pipe components, it is less difficult to assemble the valves with the pipes.

Preferably, in some embodiments, the first part 100 of the pipeline assembly and the second part 200 of the pipeline assembly are detachably connected to both ends of the first valve 400 respectively, and the second part 200 of the pipeline assembly and the third part 300 of the pipeline assembly are respectively connected to the first valve 400. The two ends of the valve 500 are detachably connected. When the detachable connection is used, if any part is damaged, only the part needs to be removed and replaced, without replacing the entire fluid drive device, which can reduce waste and use cost. In addition, the second part 200 of the pipe assembly with different inner diameters can also be replaced according to the needs of use, so as to obtain different driving forces. Regarding the replacement of the second part 200 of the pipe assembly with a different inner diameter, it will be specifically described in subsequent embodiments.

In some embodiments, the first part 100 of the pipeline assembly and the second part 200 of the pipeline assembly are engaged with both ends of the first valve 400 respectively, and the second part 200 of the pipeline assembly and the third part 300 of the pipeline assembly are respectively connected to the ends of the second valve 500 Snap on both ends. Or, in some embodiments, the first part 100 of the pipeline assembly and the second part 200 of the pipeline assembly are interference fit with the two ends of the first valve 400 respectively, and the second part 200 of the pipeline assembly and the third part 300 of the pipeline assembly are respectively connected to the second Both ends of the valve 500 have an interference fit. Alternatively, in some embodiments, the first part 100 of the pipeline assembly and the second part 200 of the pipeline assembly are respectively screwed to both ends of the first valve 400, and the second part 200 of the pipeline assembly and the third part 300 of the pipeline assembly are respectively connected to the second valve. Both ends of the 500 are threaded. Of course, other conventional detachable connection methods are also available in addition to the methods listed above.

In some embodiments, both the first valve 400 and the second valve 500 include a first housing 410, a second housing 420 and a valve body 440, the first housing 410 and the second housing 420 are detachably connected, and the valve body 440 is installed in the installation cavity 430 defined by the first housing 410 and the second housing 420, the end of the first housing 410 away from the second housing 420 is provided with a first connecting piece 411 protruding outwards, the second An end of the second shell 420 away from the first shell 410 is provided with a second connecting piece 421 protruding outward. Both the first connecting piece 411 and the second connecting piece 421 are hollow inside and communicate with the installation cavity 430 . Since the first housing 410 is detachably connected to the second housing 420, and the valve body 440 is installed in the installation cavity 430, if the valve body 440 breaks down or fails, you only need to disassemble the housing for replacement, and the operation is relatively simple. Convenience without the need to replace the valve as a whole. In the embodiment shown in the drawings, the first valve 400 and the second valve 500 have the same structure, therefore, in the following embodiments, the specific structure will be described by taking the first valve 400 as an example. However, it should be noted that the fact that the structure of the first valve 400 is the same as that of the second valve 500 is only an implementation manner, and is not the only choice.

Specifically, the interior of the first housing 410 is hollow, and an end close to the second housing 420 is open. The second housing 420 is hollow inside, and an end close to the first housing 410 is open. After the first housing 410 is connected to the second housing 420 , the hollow areas inside the two communicate to form an installation cavity 430 . The first housing 410 and the second housing 420 may be fixedly connected by threaded fasteners, or both may be fixedly connected by clamping, or other conventional detachable connection structures may also be used. The first connecting piece 411 protruding from the first housing 410 can be connected to the first part 100 of the pipeline assembly, and the second connecting piece 421 protruding from the second housing 420 can be connected to the second part 200 of the pipeline assembly. Since both the first connecting piece 411 and the second connecting piece 421 are hollow inside and communicate with the installation cavity 430, when the first valve 400 is opened, the fluid in the first part 100 of the pipeline assembly can flow into the installation cavity through the first connecting piece 411 430 , and then flow out of the installation cavity 430 through the second connection piece 421 , and flow into the second part 200 of the pipe assembly.

In some embodiments, the first connecting piece 411 is used for inserting into the first part 100 of the pipeline assembly, and the second connecting piece 421 is used for inserting into the second part 200 of the pipeline assembly. Both the first connecting piece 411 and the second connecting piece 421 include radial To the protruding protruding portion 4111 , in the length direction away from the valve body 440 , the radial dimension of the protruding portion 4111 gradually decreases. Specifically, the first connecting piece 411 can be inserted into the first part 100 of the pipeline assembly, and has an interference fit with the inner pipe wall of the first part 100 of the pipeline assembly, and the second connecting piece 421 can be inserted into the second part 200 of the pipeline assembly. , and interference fit with the inner pipe wall of the second part 200 of the pipe assembly. Taking the protruding part 4111 on the first connecting piece 411 as an example, specifically, the radial dimension of the outer end of the protruding part 4111 is smaller than the inner diameter of the first part 100 of the pipeline assembly, therefore, the outer end of the protruding part 4111 can be easily Extending into the first part 100 of the pipeline assembly, as the protrusion 4111 continues to extend into the first part 100 of the pipeline assembly, the area with a larger radial dimension on the protrusion 4111 will gradually expand the first part 100 of the pipeline assembly and form an interference Cooperate. In this embodiment, since the radial dimension of the protruding portion 4111 gradually decreases in the length direction away from the valve body 440, the protruding portion 4111 at the outer end of the first connecting piece 411 is easier to be inserted into the second pipe assembly during assembly. One part 100, can make assembly less difficult. The process of inserting the second connecting piece 421 into the second part 200 of the pipeline assembly is similar to the above process, which will not be repeated here.

In some embodiments, the valve body 440 includes a fixing part 441 and an opening and closing part 442, the fixing part 441 is clamped between the first housing 410 and the second housing 420, the opening and closing part 442 is elastic, and the opening and closing part 442 At least part of the area can rotate relative to the fixed part 441; in the natural state, the opening and closing part 442 blocks the installation cavity 430; when the pressure on the inflow side of the valve body 440 increases to a preset level, the opening and closing part 442 is Turn to open mounting cavity 430 . The aforementioned natural state refers to the state when no fluid is passed into the pipeline assembly. Specifically, in a natural state, the opening and closing portion 442 blocks the installation cavity 430, and the fluid continuously accumulates in the first part 100 of the pipeline assembly, and the pressure on the inflow side of the valve body 440 gradually increases. When the pressure increases to a preset level, it will Overcoming the elastic force of the opening and closing part 442 , the opening and closing part 442 is stretched to make it rotate relative to the fixed part 441 , and the opening and closing part 442 no longer blocks the installation cavity 430 . If the front opening and closing part 442 is stretched against the elastic force and the pressure on the outflow side of the valve body 440 increases to a certain level, the opening and closing part 442 will gradually rotate in the opposite direction and block the installation cavity 430 again. If the inflow of fluid into the first part 100 of the pipe assembly stops, the opening and closing part 442 will also reversely rotate under the action of its own resilience, and block the installation cavity 430 again.

In some embodiments, the valve body 440 includes at least two opening and closing parts 442; in a natural state, the ends of the opening and closing parts 442 away from the fixing part 441 are opposed to each other to block the installation cavity 430; the inflow of the valve body 440 When the pressure on the side increases to a preset level, the ends of the plurality of opening and closing parts 442 away from the fixing part 441 are rotated radially outward to separate. Specifically, in the embodiment shown in FIG. 10 , the valve body 440 includes two opening and closing portions 442 distributed symmetrically about the axial direction of the first valve 400 , and two fixed portions distributed symmetrically about the axial direction of the first valve 400 441. The opening and closing part 442 located on the same side of the axis of the first valve 400 is integrally connected with the fixing part 441, and the two fixing parts 441 are clamped between the first housing 410 and the second housing 420, so as to realize two The installation of the opening and closing part 442. There is a gap between the two fixing parts 441 to form an opening communicating with the inner cavity of the first connecting part 411 , and the fluid in the first part 100 of the pipeline assembly can flow into the space between the two fixing parts 441 through the first connecting part 411 . The opening and closing parts 442 are arranged obliquely with respect to the axial direction of the first valve 400 , and along the direction of fluid flow, the distance between the two opening and closing parts 442 gradually decreases until the free ends of the two close against each other. In the natural state, the free ends of the two opening and closing parts 442 are in contact. When the fluid is passed in, the fluid flowing between the two fixing parts 441 is in contact with the inner side walls of the two opening and closing parts 442. When the first part of the pipeline assembly The fluid in 100 gradually accumulates, the pressure gradually increases, and overcomes the elastic force of the opening and closing parts 442, and spreads the two opening and closing parts 442 from the inside to the outside, so that the two opening and closing parts 442 are both turned outward, and the two opening and closing parts 442 The opening and closing parts 442 are no longer resisted, so that the installation cavity 430 is no longer blocked, and the accumulated fluid will flow from between the two opening and closing parts 442 to the inner cavity of the second connecting piece 421 , and then flow into the second part 200 of the pipeline assembly. If the front opening and closing part 442 is in the state of being stretched against the elastic force, and the pressure on the outflow side of the valve body 440 increases to a certain extent, the pressure will work together with the resilience of the two opening and closing parts 442 to make the two The opening and closing parts 442 are reversely rotated, and are against each other again to block the installation cavity 430 . It should be noted that, when the two opening and closing parts 442 are turned outward, only a part of the area away from the fixing part 441 may be turned outward, or the entire opening and closing part 442 may be turned outward.

Or, in some other embodiments, the number of opening and closing parts 442 and fixing parts 441 can also be increased in pairs to more, for example, five opening and closing parts 442 are set, and the fixing parts correspondingly connected with each opening and closing part 442 Section 441. In a natural state, the free ends of the five opening and closing parts 442 bear against each other to block the installation cavity 430 . Or, in some other embodiments, a plurality of opening and closing parts 442 can also be connected to form an opening and closing mechanism, and a plurality of fixing parts 441 can also be connected to form a fixing mechanism. The opening and closing mechanism is in the shape of a hollow cone as a whole, and the tip area has an opening communicating with the hollow cavity, and the opening and closing mechanism is connected with the fixing mechanism. In a natural state, the opening at the tip of the opening and closing mechanism is closed to block the installation cavity 430 . When the fluid in the first part 100 of the pipeline assembly gradually accumulates, the opening and closing mechanism will be pushed outward, and the opening at the tip is opened, and the fluid can flow into the installation cavity 430 . Or, in some other embodiments, only one opening and closing part 442 may be provided. In a natural state, one end of the opening and closing part 442 is connected to the fixing part 441, and the other end is against the cavity wall of the installation cavity 430, so as to The installation cavity 430 is blocked. When the fluid in the first part 100 of the pipeline assembly gradually accumulates, it will push the opening and closing part 442 to rotate, so as to separate from the wall of the chamber against which it was resisted before, and the fluid can flow into the installation chamber 430 . Of course, in addition to the foregoing embodiments, the valve can also be of other structures, such as duckbill valves, fishbill valves, regulating valves, throttle valves, solenoid valves, air valves, check valves, valves, etc. Flow function valve.

As mentioned above, the first part 100 of the pipeline assembly and the second part 200 of the pipeline assembly are detachably connected to both ends of the first valve 400 respectively, and the second part 200 of the pipeline assembly and the third part 300 of the pipeline assembly are respectively connected to Removable connection at both ends. Therefore, the second part 200 of the pipe assembly with different inner diameters can be replaced according to the needs of use, so as to obtain different driving forces. For example, in some embodiments, the inner diameter of the second tubing assembly portion 200 is greater than the inner diameters of the first tubing assembly portion 100 and the third tubing assembly portion 300 . When set in this way, when an external force is applied to the second part 200 of the pipeline assembly, the volume inside the second part 200 of the pipeline assembly becomes larger and wider, correspondingly, the pressure variation range is wider and the driving force is stronger. Of course, if a large driving force is not required, the inner diameter of the second part 200 of the pipeline assembly can also be made smaller than the inner diameters of the first part 100 of the pipeline assembly and the third part 300 of the pipeline assembly. Alternatively, the inner diameters of the first part 100 of the pipeline assembly, the second part 200 of the pipeline assembly, and the third part 300 of the pipeline assembly may also be different.

Referring to FIG. 8, when the pipeline assembly has the structure shown in FIG. 1, in some embodiments, the inlet end of the second part 200 of the pipeline assembly is provided with at least two first parts 100 of the pipeline assembly, and/or, the second part of the pipeline assembly The outlet end of 200 is provided with at least two third sections 300 of the conduit assembly.

Specifically, in some embodiments, two pipeline assembly first parts 100 can be set in the pipeline assembly, the outlet ports of the two pipeline assembly first parts 100 are connected to the inlet ports of the pipeline assembly second part 200, the two pipeline assembly first A first valve 400 is provided at the connection between one part 100 and the second part 200 of the pipeline assembly, that is, the two first parts 100 of the pipeline assembly and the second part 200 of the pipeline assembly form a "Y" shape. The external forces required for the deformation of the opening and closing parts 442 of the first valves 400 corresponding to the first parts 100 of the two pipeline assemblies are different, so that after the second part 200 of the pipeline assembly is pressed, the opening and closing parts 442 of the first valves 400 corresponding to the first parts 100 of the two pipeline assemblies The degree of deformation of the opening and closing portion 442 is different, and the opening degrees of the two first valves 400 will be different. The deployment of different reagents can be achieved by using the above-mentioned pipeline components. For example, water and alcohol are respectively passed into the first parts 100 of the two pipeline components, and the opening and closing parts 442 of the first valve 400 corresponding to the first parts 100 of the two pipeline components are deformed according to the degree of deformation of the first part 100 of the two pipeline components. The mixing ratio of the alcohol is set to ensure that when the second part 200 of the pipeline assembly is pressed, water and alcohol flow into the second part 200 of the pipeline assembly according to the preset ratio for mixing.

Or, in some embodiments, two pipeline assembly third parts 300 are provided, the inlet ends of the two pipeline assembly third parts 300 are connected to the outlet ends of the pipeline assembly second part 200, and the two pipeline assembly third parts 300 A second valve 500 is provided at the connection with the second part 200 of the pipeline assembly, that is, the third part 300 of the two pipeline assemblies and the second part 200 of the pipeline assembly form a "Y" shape. When the pipeline assembly in this embodiment is used, the fluid can be split in a preset ratio. Alternatively, in some embodiments, two pipeline assembly first parts 100 and two pipeline assembly third parts 300 are provided, the outlet ends of the two pipeline assembly first parts 100 are connected to the inlet ends of the pipeline assembly second part 200, and the two The inlet ends of the third parts 300 of the pipeline assemblies are all connected to the outlet ends of the second part 200 of the pipeline assemblies, and a first valve 400 is respectively arranged at the joints of the first parts 100 of the two pipeline assemblies and the second part 200 of the pipeline assemblies. A second valve 500 is provided at the connection between the third part 300 of the pipeline assembly and the second part 200 of the pipeline assembly, that is, the first part 100 of the two pipeline assemblies and the second part 200 of the pipeline assembly are in a "Y" shape, and the two pipeline assemblies The third part 300 is in a "Y" shape with the second part 200 of the duct assembly. When using the pipeline assembly in this embodiment, not only the mixing of reagents can be performed, but also the splitting after mixing can be realized.

In the embodiment shown in FIG. 1 , the valve used is the valve body in the embodiment shown in FIG. 9 , and the specific structure will not be repeated here.

In some embodiments, the fluid driving method using the aforementioned fluid driving device includes the following steps:

S10 passing fluid from the inlet 110 into the first part 100 of the pipeline assembly;

S20 press the second part 200 of the pipeline assembly to close the first valve 400 and open the second valve 500;

S30 stop pressing the second part 200 of the pipeline assembly to open the first valve 400 and close the second valve 500;

S40 performs S20 and S30 in a cycle.

The following takes the embodiment shown in Figure 9 as an example to expand the description:

Specifically, in the initial state, there is no fluid in the pipe assembly, the opening and closing portion 442 of the valve body 440 in the first valve 400 is in a natural state, and the two opening and closing portions 442 interfere with each other to block the installation cavity 430 . The state of the second valve 500 is similar to that of the first valve 400 . When the fluid is passed into the first part 100 of the pipe assembly from the inlet 110 , the fluid gradually flows from the inlet 110 into the inner cavity of the first connecting member 411 and into the space between the two fixing parts 441 . At this time, the second part 200 of the pipeline assembly is pressed by an external force to make it elastically deformed, and the pressure in the second part 200 of the pipeline assembly increases and is applied to the outer walls of the two opening and closing parts 442 of the first valve 400 to ensure The two opening and closing parts 442 are more tightly opposed, and will not be easily washed away by the fluid accumulated on the inflow side of the opening and closing parts 442, so that more fluid can be accumulated and the power stored is greater. At the same time, the pressure in the second part 200 of the pipeline assembly will be applied to the inner side walls of the two opening and closing parts of the second valve 500, and the two opening and closing parts will rotate outward against their own elastic force, and the two opening and closing parts will gradually separate. The installation cavity of the second valve 500 is no longer blocked. Then the external force is stopped to press the second part 200 of the pipeline assembly, and the second part 200 of the pipeline assembly reversely moves under the driving force of its own resilience. The two opening and closing parts of the second valve 500 are gradually reduced due to the pressure in the second part 200 of the pipeline assembly, which is not enough to resist its elastic force, so they gradually rotate in reverse and resist again, that is, the second valve 500 is gradually closed. The pressure applied to the outer walls of the two opening and closing parts 442 of the first valve 400 in the second part 200 of the pipeline assembly gradually decreases. Since the fluid accumulated on the inflow side of the opening and closing parts 442 has accumulated enough, the accumulated force is sufficient. At this time, it will be very easy to overcome the elastic force of the two opening and closing parts 442 and the relatively small pressure in the second part 200 of the pipeline assembly, and push the inner side walls of the two opening and closing parts 442 outward, so that the two opening and closing parts 442 The free end of the joining portion 442 is separated, and no longer resists to block the installation cavity 430 . Since the previously stored force is already large enough, more fluid will quickly flow through the installation cavity 430 at a faster speed, and flow into the second part 200 of the pipeline assembly through the inner cavity of the second connecting member 421 . When the fluid flows in the second part 200 of the pipeline assembly, under the action of flow resistance such as friction between the second part 200 of the pipeline assembly, the flow velocity gradually slows down, and the power of the flow gradually becomes insufficient. At the same time, since the second valve 500 has been gradually closed at this time, when the fluid flows into the space between the two fixing parts in the second valve 500, it will be blocked again by the opening and closing parts resisting each other. At this time, the second part 200 of the pipe assembly needs to be squeezed again by external force. After squeezing, the two opening and closing parts of the second valve 500 will again overcome their own elastic force and rotate outwards, and the two opening and closing parts will gradually separate, so that The fluid blocked by the two opening and closing parts flows into the installation chamber of the second valve 500 , then flows into the third part 300 of the pipe assembly, and finally flows out from the outlet 310 . At the same time, the squeeze will close the first valve 400 again, so that the fluid on the inflow side of the opening and closing portion 442 of the first valve 400 will accumulate and store force. When the aforementioned process is repeated continuously, the intermittent driving of the fluid can be realized.

It should be added that if the second part 200 of the pipeline assembly is not squeezed, when the fluid flows into the first part 100 of the pipeline assembly and accumulates to a certain extent, the inner sidewalls of the two opening and closing parts 442 of the first valve 400 will also move toward Push them apart, so that the free ends of the two opening and closing parts 442 are separated, and the installation cavity 430 is no longer blocked. Squeezing the second part 200 of the pipeline assembly by external force can make the fluid accumulate enough on the inflow side of the first valve 400, and the accumulation force is large enough, so that when the first valve 400 is opened, more fluid flows into the pipeline at a faster flow rate The second part 200 of the assembly has a sufficiently large driving force. Therefore, if the fluid drive device is applied in some fields, it will not affect the original normal flow of the fluid, and only need to press when it is necessary to increase the driving force of the fluid flow, or when the flow is slow due to blockage. Or, in another embodiment, when the second part 200 of the pipe assembly is not squeezed, the inner sidewalls of the two opening and closing parts 442 of the first valve 400 do not resist, and there is a gap between them. The second valve 500 is similar to the first valve 400 with a smaller gap for fluid flow. In this way, when the fluid is not pressed, the fluid can flow normally from the gap between the opening and closing parts 442 , and when the pipeline is blocked and the flow is slow, it is enough to increase the power of the flow by pressing.

In some embodiments, the material of the aforementioned pipeline assembly and valve body can be flexibly adjusted, such as polymers such as rubber, silica gel, and plastic, or even ceramics, metal, etc. can be used. The cross-sectional shape of the inner cavity of the pipe assembly can be circular, elliptical, square, rhombus, star, polygonal, etc.

In some embodiments, the aforementioned fluid drive device can be used for micro-fluid drive, and the external force is applied by a micro-motor, a micro-motor, a vibration motor or a flat motor. Utilizing the vibration characteristics around the vibration motor, it is installed in a custom-made housing with the pipeline assembly and valve, and the other vibration directions of the motor are restricted through the housing, so that the motor can squeeze the second part of the pipeline assembly regularly, and the motor can be changed by changing the Amplitude, frequency to control fluid flow rate.

In some embodiments, the aforementioned fluid-driven device can be used for interstitial fluid drainage in animals. For example, the device can be implanted in an animal using a tubing assembly of biocompatible material and a valve of relevant size and material, for example, it can be applied to the human eye. The interior of the human eyeball is filled with a lot of aqueous humor, which is constantly circulating in the eyeball. When related diseases occur, the circulation of aqueous humor in the eye is blocked, and when the aqueous humor cannot be discharged in time, the intraocular pressure will continue to rise, which will cause great damage to the eyeball. The inflow port of the device is connected to the anterior chamber of the eyeball, and the outflow port is connected to the vein. The pipeline components can be implanted subcutaneously or fixed outside the body. The device drives the outflow of aqueous humor to reduce intraocular pressure.

In some embodiments, the aforementioned fluid-driven devices may be used to help occlude blood flow within a blood vessel. The device can be implanted into animals by adopting common small-sized pipeline components with biocompatible materials and matching valves of relevant sizes and materials. The device is implanted in the body and connected to the blood vessels of the legs correctly in the direction of blood flow. When the blood flow is slow or when diseases such as thrombosis occur, pressing the device can help the blood flow faster.

In some embodiments, the aforementioned fluid drive device can be used with an insulin delivery pump. Connect the outflow port of the pipeline assembly of the device to the site where the patient needs to inject insulin through the medical catheter, and when the insulin needs to be injected, the insulin is delivered to the injection site through the device. Alternatively, the aforementioned fluid drive device can also be used in an analgesic pump, and the specific setting method is similar to the above embodiment, except that insulin is replaced by an analgesic drug such as anesthetic or diazepam. In addition, in addition to the above-mentioned application scenarios, the device can also be used in the fields of micro-device cooling, microfluidic chip integration, chip cooling, and biochemical analysis.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the patent scope of the invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (10)

1. The fluid driving device is characterized in that, comprising: A pipe assembly, the interior of the pipe assembly is hollow, the pipe assembly includes a first part of the pipe assembly, a second part of the pipe assembly, and a third part of the pipe assembly distributed in sequence along the length direction, and the outer end of the first part of the pipe assembly is provided There is an inflow port, and the outer end of the third part of the pipeline assembly is provided with an outflow port; A valve assembly, the valve assembly includes a first valve and a second valve, both of the first valve and the second valve are fixedly connected to the pipeline assembly, and the first valve is installed on the first part of the pipeline assembly and Between the second part of the pipeline assembly, the second valve is installed between the second part of the pipeline assembly and the third part of the pipeline assembly; In the first state, the second part of the pipeline assembly can be elastically deformed by being squeezed by an external force, and the pressure on the inflow side of the second valve and the pressure on the outflow side of the first valve increase, so that the the second valve is open and the first valve is closed; In the second state, the second part of the pipeline assembly can reversely move when the external force disappears, the pressure on the outflow side of the first valve and the pressure on the inflow side of the second valve decrease, so that the first valve One valve is open, the second valve is closed, and the first state alternates with the second state. 2. The fluid driving device according to claim 1, characterized in that, the first part of the pipeline assembly, the second part of the pipeline assembly and the third part of the pipeline assembly are integrally connected, and the first valve and the The second valves are all installed inside the pipeline assembly, the first valve is located at the connection between the first part of the pipeline assembly and the second part of the pipeline assembly, and the second valve is located at the connection between the second part of the pipeline assembly and the second part of the pipeline assembly. The connecting part of the third part of the pipeline assembly. 3. The fluid driving device according to claim 2, wherein at least two first parts of the pipe assembly are provided at the inlet end of the second part of the pipe assembly, and/or, the second part of the pipe assembly The outlet end of the conduit assembly is provided with at least two third portions of the conduit assembly. 4. The fluid driving device according to claim 1, wherein the first part of the pipeline assembly, the second part of the pipeline assembly, and the third part of the pipeline assembly are distributed along the length direction at intervals, and the second part of the pipeline assembly A part is connected to the second part of the pipeline assembly through the first valve, and the second part of the pipeline assembly is connected to the third part of the pipeline assembly through the second valve. 5. The fluid driving device according to claim 4, wherein the first part of the pipeline assembly and the second part of the pipeline assembly are respectively detachably connected to both ends of the first valve, and the second part of the pipeline assembly The second part and the third part of the pipeline assembly are respectively detachably connected to both ends of the second valve. 6. The fluid driving device according to claim 5, wherein the first valve and the second valve both comprise a first housing, a second housing and a valve body, and the first housing and the The second housing is detachably connected, the valve body is installed in the installation cavity defined by the first housing and the second housing, and the end of the first housing is far away from the second housing There is a first connecting piece protruding outward, and a second connecting piece protruding outward is provided on the end of the second shell away from the first shell, and the first connecting piece is connected to the first connecting piece. Both connectors are hollow inside and communicate with the installation cavity; The first connecting piece is used for inserting into the first part of the pipeline assembly, and the second connecting piece is used for inserting into the second part of the pipeline assembly. Both the first connecting piece and the second connecting piece include To the protruding protruding portion, the radial dimension of the protruding portion decreases gradually in the direction of the length away from the valve body. 7. The fluid drive device according to claim 6, wherein the valve body comprises a fixing part and an opening and closing part, and the fixing part is clamped between the first housing and the second housing Between, the opening and closing part has elasticity, and at least a partial area of the opening and closing part can rotate relative to the fixed part; In a natural state, the opening and closing part blocks the installation cavity; when the pressure on the inflow side increases to a preset level, the opening and closing part rotates relative to the fixing part to open the installation cavity. 8. The fluid drive device according to claim 7, wherein the valve body includes at least two opening and closing parts; in a natural state, one end of the plurality of opening and closing parts away from the fixed part butt against each other to block the installation cavity; when the pressure on the inflow side increases to a preset level, ends of the plurality of opening and closing parts away from the fixing part are rotated radially outward to separate. 9. The fluid driving device according to claim 1, wherein the inner diameter of the second portion of the pipe assembly is larger than the inner diameters of the first portion of the pipe assembly and the third portion of the pipe assembly. 10. The fluid driving method based on the fluid driving device according to any one of claims 1 to 9, characterized in that it comprises the following steps: S10 passing fluid from the inflow port into the first part of the pipeline assembly; S20 pressing the second part of the pipeline assembly to close the first valve and open the second valve; S30 stop pressing the second part of the pipeline assembly to open the first valve and close the second valve; S40 performs S20 and S30 in a cycle.

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