Valve and fluid conveying device

Abstract

The utility model relates to the technical field of valve pump integration devices, and discloses a valve and a fluid conveying device. The valve comprises a valve body and a plurality of opening and closing pieces in one-to-one correspondence with valve cavities; a plurality of valve cavities comprising valve ports are defined by the valve body; a valve port of each valve cavity faces the first direction; each opening and closing piece comprises an opening and closing part aligned with the valve port of the corresponding valve cavity; the multiple opening and closing pieces are constructed to be capable of sequentially and alternately moving in a reciprocating mode in the first direction. The valve body is provided with the valve cavities with the valve ports, and the opening and closing pieces which are in one-to-one correspondence with the valve cavities and can open or close the corresponding valve ports are arranged, so that the valve has a reliable flow path switching function; according to the Manifold system, valves on all flow paths in the known Manifold system can be effectively replaced, so that the complexity of the overall structure of the Manifold system integrated with valve pump products can be effectively simplified, the size of the overall structure is reduced, and the integration degree of the overall structure is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve pump class integrated device technical field, specifically, relate to a valve and fluid conveying device. BACKGROUND

[0002] The content of this part only provides the background information related to the utility model, which can not constitute the prior art.

[0003] In the medical, industrial and other fields, fluid transmission and control are one of the core functions of many devices. Manifold system (fluid distribution / collecting system) as a kind of key component, is widely used in fluid distribution and collection. Its main function is to collect fluid from multiple sources to a common outlet, or distribute fluid from a single source to multiple outlets.

[0004] When the known Manifold system is integrated with valve pump products, a valve (such as solenoid valve) for controlling the on-off of each flow path in the Manifold system is usually configured, and then the Manifold system is integrated with a pump (such as plunger pump). This split design results in complex overall structure, large volume, low integration, and is difficult to realize compactness and miniaturization, which limits the application of the device in space-limited environment.

[0005] At the same time, the known pinch valve with multiple branches has the problem of difficult manufacturing and processing of the multiple branch pipelines during use, and the elastic deformation of the pinch valve branch after long-term extrusion is irreversible, which affects the reliability and service life of the pinch valve. UTILITY MODEL CONTENT

[0006] Therefore, the purpose of the utility model is to provide a valve and a fluid conveying device using the valve, to at least overcome the technical problems of complex overall structure, large volume and low integration when the known Manifold system is integrated with valve pump products.

[0007] The purpose of the utility model is achieved by the following technical solutions:

[0008] On the one hand, the utility model discloses a valve, comprising:

[0009] A valve body defines a plurality of valve cavities containing valve ports; the valve ports of each valve cavity are all directed to a first direction;

[0010] A plurality of opening and closing members corresponding to the valve cavities; each opening and closing member comprises an opening and closing part aligned with the valve port of the corresponding valve cavity;

[0011] Among them, the plurality of opening and closing members are constructed to be able to move reciprocally along the first direction alternately, so that the valve ports of the plurality of valve cavities are opened or closed alternately.

[0012] Further, each of the opening and closing members further comprises a force receiving part; the opening and closing part and the force receiving part of each of the opening and closing members are oppositely arranged along the first direction; wherein the force receiving part is configured to receive the pressing force for forcing the opening and closing member to move along the first direction towards the corresponding valve port; the force receiving parts of the plurality of opening and closing members are arranged on the same circle with the first axis extending along the first direction as the center;

[0013] The valve further comprises a power assembly, which comprises:

[0014] The force applying member has a force applying part opposite to the force receiving part of the plurality of opening and closing members; the force applying part is in a ring-shaped closed structure, and at least part of the force applying part is distributed at different height positions along the first direction; and the force applying part is configured to rotate in a plane perpendicular to the first direction around the first axis, so that the part of the force applying part at the lowest position along the first direction can alternately press the force receiving part of each of the opening and closing members, thereby alternately applying the pressing force to the force receiving part of each of the opening and closing members through rotation of the force applying part;

[0015] The elastic member is configured to elastically keep the opening and closing member at a position where the opening and closing part does not close the corresponding valve port.

[0016] Further, the force applying part is a curved surface extending along the rotation path thereof and then closed;

[0017] The force receiving part of the opening and closing member and the force applying part are in point contact.

[0018] Further, the opening and closing member further comprises:

[0019] The sliding sleeve is configured to be freely slidable along the first direction; one end of the sliding sleeve serves as the force receiving part;

[0020] The opening and closing rod has one end serving as the opening and closing part, and the other end extending from the other end of the sliding sleeve to the inside of the sliding sleeve along the first direction; the opening and closing rod and the sliding sleeve are in sliding fit;

[0021] The buffer spring is arranged in the inside of the sliding sleeve; two ends of the buffer spring are connected to the sliding sleeve and the opening and closing rod respectively.

[0022] Further, the valve further comprises a position detecting component; the position detecting component is configured to detect the rotation position of the force applying part during rotation.

[0023] Further, the power assembly further comprises a driving component; the force applying member is drivingly connected to the driving component;

[0024] The valve further comprises a controller; the driving component and the position detecting component are in communication connection with the controller.

[0025] Further, the position detecting component comprises a code disc and an identification optical coupler cooperating with the code disc;

[0026] The code disc is configured to follow the coaxial rotation of the force applying part, and the recognition light coupling is fixedly arranged beside the code disc.

[0027] Further, the valve further comprises a sealing member corresponding to each valve cavity, and the sealing member comprises:

[0028] A diaphragm is positioned in the corresponding valve cavity and between the valve port in the valve cavity and the opening and closing part, and the opening and closing part is connected to the diaphragm.

[0029] Further, the valve body is further provided with a common flow channel and a plurality of branch flow channels corresponding to the valve cavities;

[0030] The plurality of valve cavities are in communication with the common flow channel, and each branch flow channel is in communication with the valve port in the corresponding valve cavity.

[0031] In another aspect, the utility model discloses a kind of fluid delivery devices, including pumping component and the valve described above;

[0032] The pumping port of the pumping component is in communication with the plurality of valve cavities in the valve body simultaneously.

[0033] The technical scheme of the utility model embodiment at least has the following advantages and beneficial effects:

[0034] The valve disclosed by the utility model, by setting a plurality of valve cavities with valve ports on the valve body, and setting opening and closing parts corresponding to the valve cavities and capable of opening or closing the corresponding valve ports, the valve has reliable flow path switching function, when the valve is integrated into Manifold system for use, can effectively replace the valve on each flow path in the known Manifold system, so as to effectively simplify the complexity of the overall structure of the Manifold system integrated with valve pump type products, reduce the volume of the overall structure, and improve the integration of the overall structure.

[0035] In addition, when the valve is integrated into a pinch valve for use, the valve head including a pinch pipe in the known pinch valve can be effectively replaced, thereby effectively avoiding the problems of low reliability and short service life caused by deformation and damage of the pinch pipe branch. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 The structure schematic view of the valve provided for the embodiment of the utility model is shown in the figure;

[0037] Figure 2 The structure schematic view of the valve provided for the embodiment of the utility model is shown in the figure; Figure 1 The sectional view of the valve shown in the figure;

[0038] Figure 3 The partial structure sectional view of the valve body provided for the embodiment of the utility model is shown in the figure;

[0039] Figure 4 The partial structure sectional view of the valve body provided for the embodiment of the utility model is shown in the figure;Figure 2 A local structure at the middle of B is enlarged;

[0040] Figure 5 A structure schematic view of the opening and closing member is provided for the embodiment of the utility model;

[0041] Figure 6 For Figure 5 The structure schematic view of the opening and closing member in the section state is shown in B;

[0042] Figure 7 A structure schematic view of the force applying member and the code disc is provided for the embodiment of the utility model;

[0043] Figure 8 A structure schematic view of the fluid conveying device is provided for the embodiment of the utility model;

[0044] Figure 9 For Figure 8 The section view of the fluid conveying device is shown in B.

[0045] Icon: 100-valve, 10-valve body, 11-valve cavity, 111-valve port, 12-common flow channel, 13-branch flow channel, 14-moving cavity, 20-opening and closing member, 21-opening and closing part, 22-force receiving part, 23-sliding sleeve, 24-opening and closing rod, 25-buffer spring, 26-positioning sleeve, 30-power assembly, 31-force applying member, 311-force applying part, 3111-first part, 3112-second part, 3113-third part, 32-elastic member, 33-driving part, 40-sealing member, 41-diaphragm, 42-diaphragm skeleton, 43-diaphragm pressing plate, 50-position detection part, 51-code disc, 52-identification optical coupler, 60-controller, 200-pumping part, 201-pumping port. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme of the utility model will be described clearly and completely in combination with specific implementation manners below. Same reference signs in the drawings represent same parts. It should be noted that the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0047] Compared to the embodiments shown in the accompanying drawings, feasible embodiments within the scope of protection of this utility model may have fewer components, have other components not shown in the drawings, different components, components arranged differently, or components with different connections, etc. Furthermore, two or more components shown in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0048] Example 1

[0049] Embodiment 1 of this utility model discloses a valve 100, which is particularly a valve 100 that can be applied to the Manifold system and can freely realize flow path switching, in order to simplify the complexity of the overall structure, reduce the volume of the overall structure, and improve the integration of the overall structure when integrating the Manifold system with valve and pump products.

[0050] Figure 1 This is a schematic diagram of the structure of an exemplary valve 100 shown in an embodiment of the present utility model. Figure 2 This is a cross-sectional view of valve 100. Figure 1 and Figure 2 In the illustrated embodiment, the valve 100 may include a valve body 10.

[0051] Valve body 10 is primarily used to provide flow path switching functionality. Specifically, Figure 3 This is a partial structural cross-sectional view of the valve body 10, combined with... Figure 3 As shown, the valve body 10 internally defines a plurality of valve chambers 11, each containing a valve port 111, and the valve port 111 of each valve chamber 11 faces the first direction d. For example, this embodiment discloses a valve body 10 with four valve chambers 11. Of course, the number of valve chambers 11 is not limited to this and is not limited here.

[0052] In this embodiment, the valve port 111 refers to the channel within the valve cavity 11 used for fluid to enter and exit the corresponding valve cavity 11. Meanwhile, the first direction d in this embodiment can be... Figure 2 , Figure 3 or Figure 4 The direction indicated by the double-headed arrow can also be understood as the axial direction of the valve body 10, wherein the axis of the valve body 10 can coincide with the first axis s, which will be described below.

[0053] To achieve the basic fluid transport function of this valve 100, continue to refer to... Figure 3The valve body 10 can further be provided with a common flow channel 12 and a plurality of branch flow channels 13 corresponding to the valve cavities 11. The plurality of valve cavities 11 are communicated with a pumping component 200 to be described below through the common flow channel 12. For example, the plurality of valve cavities 11 can be simultaneously communicated with one end of the common flow channel 12, and the other end of the common flow channel 12 can be communicated with the pumping component 200 to realize the communication between the plurality of valve cavities 11 and the pumping component 200. Further, the communication position of each valve cavity 11 with the common flow channel 12 can be located above the valve port 111 in the corresponding valve cavity 11.

[0054] One end of each branch flow channel 13 is communicated with the valve port 111 of the corresponding valve cavity 11, and the other end of each branch flow channel 13 can be communicated with an external flow path, for example, a single flow path in a Manifold system, to form a delivery flow path for fluid flow.

[0055] It can be understood that, based on the above arrangement, when the valve 100 is applied to the Manifold system, only the plurality of flow paths in the Manifold system need to be communicated with different branch flow channels 13, and the opening and closing of the valve ports 111 on each valve cavity 11 need to be reasonably controlled, so as to realize the conduction of different branch flow channels 13 with the common flow channel 12, to realize the switching of the flow paths, that is, to realize the integration of the valves on the plurality of flow paths in the Manifold system known in the prior art, thereby helping to simplify the complexity of the overall structure, reduce the volume of the overall structure, and improve the integration of the overall structure when the Manifold system is integrated with the valve pump product. On this basis, only the pumping component 200 needs to be reasonably controlled, and different flow paths can be used to deliver fluid to realize the transfer of fluid.

[0056] In order to control the opening and closing of the valve ports 111 in each valve cavity 11 to realize the switching of the flow paths, in combination with the contents shown in Figure 2 and Figure 4 The valve 100 disclosed in the embodiment can further include a plurality of opening and closing members 20 corresponding to the valve cavities 11.

[0057] The plurality of opening and closing members 20 can be arranged on the valve body 10, and each opening and closing member 20 can reciprocate along a first direction d, specifically, reciprocate linearly. For example, as shown in Figure 3 The valve body 10 is provided with a movable cavity 14 corresponding to each opening and closing member 20 and extending along the first direction d, and each opening and closing member 20 can be movably arranged in the corresponding movable cavity 14, so that each opening and closing member 20 can reciprocate linearly in the corresponding movable cavity 14 along the first direction d.

[0058] As shown in Figure 4As shown, each opening / closing element 20 includes an opening / closing portion 21. The opening / closing portion 21 of each opening / closing element 20 is aligned with the valve port 111 of the corresponding valve chamber 11.

[0059] Based on the above configuration, for a single valve chamber 11 and its corresponding opening / closing element 20, it is only necessary to move the opening / closing element 20 along the first direction d toward the corresponding valve port 111 so that its own opening / closing part 21 blocks the corresponding valve port 111, thereby closing the valve port 111 of the valve chamber 11. Conversely, it is only necessary to move the opening / closing element 20 along the first direction d away from the corresponding valve port 111 so that its own opening / closing part 21 no longer blocks the corresponding valve port 111, thereby opening the valve port 111 of the valve chamber 11. Furthermore, by controlling multiple opening / closing elements 20 to move alternately along the first direction d, the valve ports 111 of multiple valve chambers 11 can be opened or closed alternately, meaning that only one valve port 111 of a valve chamber 11 is opened at any given time, thus achieving flow path switching.

[0060] It is understandable that by setting opening and closing elements 20 on the valve body 10 that correspond one-to-one with the valve chamber 11 and can reciprocate along the first direction d to open or close the corresponding valve port 111, it helps to further optimize the structural design of the valve 100, thereby making it more conducive to achieving a compact and miniaturized design.

[0061] In some embodiments of this utility model, the valve 100 may further include a power assembly 30, which is mainly used to provide power for the reciprocating movement of each opening and closing element 20 along the first direction d. The valve 100 may be further constructed in the manner described below, but is not limited to, to make the structure of the valve 100 more compact and to enable the multiple opening and closing elements 20 to reciprocate more reliably along the first direction d.

[0062] Specifically, in combination Figure 4 As shown, each opening / closing member 20 may also include a force-receiving part 22, with the opening / closing part 21 and the force-receiving part 22 of each opening / closing member 20 arranged opposite to each other along a first direction d. The force-receiving part 22 of the opening / closing member 20 is used to receive the resistance force that forces the opening / closing member 20 to move along the first direction d toward the corresponding valve port 111, specifically the resistance force applied by the force-applying member 31 in the power assembly 30.

[0063] Furthermore, the force-bearing portions 22 of the multiple opening and closing elements 20 are arranged on the same circumference with the first axis s extending along the first direction d as the center. In this embodiment, the valve ports 111 in the multiple valve chambers 11 are also arranged on the same circumference with the first axis s as the center, and the multiple opening and closing elements 20 corresponding one-to-one with the valve chambers 11 are also distributed on the same circumference with the first axis s as the center, so as to further optimize the structural design of the valve 100.

[0064] CombinationFigure 2 and Figure 4 As shown in the drawings, the power assembly 30 can include a force applying member 31, an elastic member 32, and a driving member 33. The force applying member 31 can be arranged above the force receiving portions 22 of the plurality of opening and closing members 20, and the force applying member 31 has force applying portions 311 opposite to the force receiving portions 22 of the plurality of opening and closing members 20. The force applying portions 311 are annularly closed structures, and at least part of the force applying portions 311 are distributed at different height positions in the first direction d.

[0065] Further, the force applying portions 311 are configured to be rotatable about the first axis s in a plane perpendicular to the first direction d, so that the portions of the force applying portions 311 at the lowest positions in the first direction d can alternately abut against the force receiving portions 22 of the opening and closing members 20 in sequence, so as to apply the aforementioned abutting pressure to the force receiving portions 22 of the opening and closing members 20 in sequence by the rotation of the force applying portions 311, that is, the force to force the opening and closing members 20 to move along the first direction d towards the corresponding valve ports 111. In other words, the abutting pressure applied to the force receiving portions 22 of the opening and closing members 20 comes from the force applying portions 311 of the force applying member 31, which, as aforementioned, are distributed on the same circumference with the first axis s extending in the first direction d as the center based on the force receiving portions 22 of the plurality of opening and closing members 20, and when the force applying portions 311 are rotated to the portions thereof at the lowest positions in the first direction d abut against the force receiving portions 22 of a single opening and closing member 20 (that is, the state of the right opening and closing member 20 in the middle of FIG. 1), the force applying portions 311 can abut against the force receiving portions 22 of the corresponding opening and closing member 20 to apply the abutting pressure to the force receiving portions 22 of the opening and closing member 20. Figure 4 Further, the force applying portions 311 are configured to be rotatable about the first axis s in a plane perpendicular to the first direction d, so that the portions of the force applying portions 311 at the lowest positions in the first direction d can alternately abut against the force receiving portions 22 of the opening and closing members 20 in sequence, so as to apply the aforementioned abutting pressure to the force receiving portions 22 of the opening and closing members 20 in sequence by the rotation of the force applying portions 311, that is, the force to force the opening and closing members 20 to move along the first direction d towards the corresponding valve ports 111. In other words, the abutting pressure applied to the force receiving portions 22 of the opening and closing members 20 comes from the force applying portions 311 of the force applying member 31, which, as aforementioned, are distributed on the same circumference with the first axis s extending in the first direction d as the center based on the force receiving portions 22 of the plurality of opening and closing members 20, and when the force applying portions 311 are rotated to the portions thereof at the lowest positions in the first direction d abut against the force receiving portions 22 of a single opening and closing member 20 (that is, the state of the right opening and closing member 20 in the middle of FIG. 1), the force applying portions 311 can abut against the force receiving portions 22 of the corresponding opening and closing member 20 to apply the abutting pressure to the force receiving portions 22 of the opening and closing member 20.

[0066] The elastic member 32 is used to elastically hold the opening and closing members 20 at the positions where the opening and closing portions 21 of the opening and closing members 20 do not close the corresponding valve ports 111. In other words, the elastic member 32 is used to provide the opening and closing members 20 with an elastic biasing force to force the opening and closing portions 21 of the opening and closing members 20 to be at the positions where the corresponding valve ports 111 are opened. The elastic member 32 can be an opening and closing spring corresponding to the opening and closing members 20 one by one, and the opening and closing spring can be arranged in the aforementioned movable cavity 14, one end of the opening and closing spring is fixed, and the other end of the opening and closing spring is connected to the corresponding opening and closing member 20.

[0067] Based on the above setting, for a single closing member 20, it is assumed that in the initial state, the closing member 20 is elastically retained by the elastic member 32 in a position where the closing portion 21 of the closing member 20 does not close the corresponding valve port 111. On this basis, when the force applying portion 311 of the force applying member 31 rotates to abut against the force receiving portion 22 of the closing member 20 (i.e., the state of the closing member 20 on the right side in FIG. 6), the closing member 20 will move in the first direction d towards the direction of the corresponding valve port 111 until the closing portion 21 of the closing member 20 blocks and closes the corresponding valve port 111, and in the process, the elastic member 32 will be compressed to store an elastic force. Conversely, when the force applying portion 311 rotates to no longer abut against the force receiving portion 22 of the closing member 20 (i.e., the state of the closing member 20 on the left side in FIG. 6), the abutting pressure acting on the force receiving portion 22 of the closing member 20 disappears, and in the process, the elastic member 32 can release the stored elastic force to force the closing member 20 to return to the position where the closing portion 21 does not close the corresponding valve port 111, to wait for receiving the abutting pressure from the force applying portion 311 again. Figure 4 Figure 4

[0068] Specifically, as shown in FIG. 6, the force applying portion 311 can be coaxially arranged with the force applying member 31, and the force applying member 31 is drivingly connected to the output end of the driving member 33, so that the force applying member 31 is coaxially rotated by the driving member 33 to drive the force applying portion 311 to rotate. As shown in FIG. 6, the driving member 33 can be a motor, such as a stepper motor, which is drivingly connected to the force applying member 31. Figure 2

[0069] It is worth noting that by using the above design, the purpose of sequentially and alternately opening or closing the valve ports 111 of the plurality of valve cavities 11 by the closing portions 21 of the plurality of closing members 20 is achieved, and since only one driving member 33 is needed to provide power for the actions of the plurality of closing members 20, the manufacturing and use cost of the valve 100 can be effectively reduced, and the structure of the valve 100 can be more compact.

[0070] In some embodiments of the present application, the force applying portion 311 can be configured as a curved surface extending along the rotation path of the force applying portion 311 and then closed, that is, the force applying portion 311 can be a curved surface with the first axis s as the center and in a ring closed structure. Specifically, as shown in FIG. 6, the force applying portion 311 can be a curved surface extending along the rotation path of the force applying portion 311 and then closed. Figure 7 ​​​As shown, the force applying part 311 in curved surface form can have a first part 3111 at the lowest position in the first direction d and a second part 3112 at the highest position in the first direction d, and the two ends of the first part 3111 are connected to the two ends of the second part 3112 by means of a third part 3113, and the first part 3111 and the third part 3113 and the second part 3112 and the third part 3113 are smoothly connected to form a ring-shaped closed and smooth curved surface. At this time, the force receiving part 22 of each opening and closing piece 20 is in contact with the force applying part 311. It can be understood that by configuring the force applying part 311 as a curved surface distributed at different height positions in the first direction d, the force receiving part 22 of each opening and closing piece 20 can more smoothly contact each part of the force applying part 311 at different height positions in the first direction d to smoothly receive the pressing force from the force applying part 311.

[0071] In some embodiments of the present application, the force receiving part 22 of the opening and closing piece 20 is in point contact with the force applying part 311. For example, referring to Figure 4 or Figure 5 As shown, the force receiving part 22 of each opening and closing piece 20 can be configured as an arc-shaped hemispherical structure so that the contact between the force receiving part 22 and the force applying part 311 is point contact.

[0072] It can be understood that by configuring the force receiving part 22 and the force applying part 311 as point contact, the contact area between the force receiving part 22 and the force applying part 311 can be minimized, thereby helping to reduce the friction between the force applying part 311 and the force receiving part 22 of each opening and closing piece 20 when the force applying part 311 rotates in a plane perpendicular to the first direction d about the first axis s, thereby facilitating the reduction of the torque required to rotate the force applying part 311 for flow path switching, and effectively improving the reliability of flow path switching.

[0073] In some embodiments of the present application, the opening and closing piece 20 can be further configured in the following manner, but is not limited thereto.

[0074] In combination with the contents shown in Figure 4 , Figure 5 and Figure 6 , each opening and closing piece 20 can further include a sliding sleeve 23, an opening and closing rod 24, a buffer spring 25 and a positioning sleeve 26. Among them, the sliding sleeve 23 is slidingly arranged in the corresponding movable cavity 14 of the valve body 10 and can freely slide in the first direction, one end of the sliding sleeve 23 serves as the force receiving part 22 of the opening and closing piece 20, at least part of the force receiving part 22 extends out of the corresponding movable cavity 14 and is opposite to the force applying part 311, so that the force receiving part 22 can smoothly receive the pressing force from the force applying part 311.

[0075] One end of the opening and closing rod 24 serves as the opening and closing part 21 of the opening and closing part 20, and the other end of the opening and closing rod 24 extends from the other end of the sliding sleeve 23 to the inside of the sliding sleeve 23 along the first direction d, and the opening and closing rod 24 and the sliding sleeve 23 can be slidably connected. The positioning sleeve 26 is connected to the sliding sleeve 23 to position and guide the opening and closing rod 24. Among them, the opening and closing spring as the elastic member 32 can be connected to the positioning sleeve 26 or the sliding sleeve 23.

[0076] The buffer spring 25 can be arranged inside the sliding sleeve 23. Among them, one end of the buffer spring 25 is connected to the sliding sleeve 23, and the other end of the buffer spring 25 is connected to the opening and closing rod 24.

[0077] In this way, for a single opening and closing part 20, in combination with the above-mentioned design, the opening and closing part 20 can be reliably closed to the corresponding valve port 111 without the need for extremely high dimensional control precision. Figure 4 As can be seen from the left opening and closing part 20 in the middle, when the force applying part 311 does not apply a pressing force to the force receiving part 22 of the opening and closing part 20, the entire opening and closing part 20 is elastically held away from the corresponding valve port 111 by the elastic member 32, and the opening and closing rod 24 is also elastically held away from the corresponding valve port 111 by the buffer spring 25. On this basis, when the force applying part 311 applies a pressing force to the force receiving part 22 of the opening and closing part 20, the sliding sleeve 23, the opening and closing rod 24, the buffer spring 25 and the positioning sleeve 26 will first move as a whole and simultaneously approach the corresponding valve port 111 along the first direction d, so that the opening and closing part 21 of the opening and closing part 20 continuously approaches the corresponding valve port 111. When the opening and closing part 21 of the opening and closing part 20 starts to close the corresponding valve port 111, the opening and closing part 21 will be subjected to a reaction force (i.e. a force opposite to the pressing force) from the valve port 111. At this time, the opening and closing rod 24 can overcome the elastic force of the buffer spring 25 and move away from the corresponding valve port 111 along the first direction d, until the buffer spring 25 is compressed to the limit state. With the force applying part 311 continuously applying a pressing force to the force receiving part 22, the pressing force will be directly transmitted to the opening and closing rod 24 through the sliding sleeve 23 and the buffer spring 25, so that the opening and closing part 21 continues to close the corresponding valve port 111 until the corresponding valve port 111 is reliably closed.

[0078] It can be understood that by adopting the above design, due to the presence of the buffer spring 25, the connection between the force receiving part 22 and the opening and closing part 21 is a flexible connection, that is, the buffer spring 25 can play a certain buffering role when the opening and closing rod 24 as one end of the opening and closing part 21 closes the corresponding valve port 111, thereby helping the opening and closing part 21 to reliably close the corresponding valve port 111 without the need for extremely high dimensional control precision.

[0079] In other embodiments of this utility model, the aforementioned force-receiving part 22 can also be a force-receiving ball disposed at the end of the sliding sleeve 23 away from the opening / closing rod 24, and the force-receiving ball is disposed on the sliding sleeve 23 in a freely rolling manner. In this way, while achieving point contact between the force-receiving part 22 and the force-applying part 311, it is beneficial to further reduce the frictional force between the force-receiving part 22 and the force-applying part 311.

[0080] In some embodiments of this utility model, combined with Figure 4 As shown, valve 100 may further include sealing elements 40 corresponding to valve chambers 11. Sealing element 40 may include a diaphragm 41, a diaphragm frame 42, and a diaphragm pressure plate 43. The diaphragm frame 42 is connected to the diaphragm 41. The diaphragm 41 is positioned within the corresponding valve chamber 11 by means of the diaphragm pressure plate 43, and is located between the valve port 111 and the opening / closing portion 21 within the valve chamber 11. The opening / closing portion 21, aligned with the valve port 11 within the valve chamber 11, is connected to the diaphragm 41 within the valve chamber 11, specifically to the diaphragm frame 42. The diaphragm 41 has elastic deformation capability; for example, the diaphragm 41 may be made of rubber.

[0081] Based on the above configuration, when the opening / closing part 21 of the opening / closing member 20 moves along the first direction d toward the corresponding valve port 111, the opening / closing part 21 will force the diaphragm 41 to undergo elastic deformation until the diaphragm 41 contacts the corresponding valve port 111 to seal the corresponding valve port 111; conversely, when the opening / closing part 21 of the opening / closing member 20 moves along the first direction d away from the corresponding valve port 111, the diaphragm 41 will recover its deformation until the diaphragm 41 is no longer in contact with the corresponding valve port 111, thereby opening the corresponding valve port 111. In other words, when the sealing member 40 with the above-described structure is provided, the component used to open or close the valve port 111 is actually the diaphragm 41, which helps to improve the sealing performance when closing the valve port 111.

[0082] In some embodiments of this utility model, the valve 100 may further include a position detection component 50 and a controller 60. The position detection component 50 is configured to detect the rotational position of the force-applying part 311 when it rotates and to issue corresponding position information.

[0083] Meanwhile, both the position detection component 50 and the drive component 33 can be communicatively connected to the controller 60. The controller 60 is adapted to receive position information from the position detection component 50, which represents the rotational position of the force-applying part 311, and control the drive component 33 based on the position information to achieve precise switching of the flow path.

[0084] Reference Figure 2As shown, the position detecting component 50 can comprise a code disc 51 and an identification optical coupler 52 matched with the code disc 51. The code disc 51 can be coaxially arranged with the force applying part 311, for example, the code disc 51 can be coaxially arranged on the force applying part 31 in the manner as shown. Figure 7 The identification optical coupler 52 is fixedly arranged beside the code disc 51, so that when the force applying part 311 rotates synchronously with the code disc 51, the identification optical coupler 52 can obtain the position information of the force applying part 311 based on the rotation of the code disc 51, thereby facilitating reasonable control of the rotation position of the force applying part 311 according to the position information, so as to improve the accuracy during flow path switching. Of course, in other embodiments of the utility model, the position detecting component 50 can also be other components capable of detecting the rotation position of the force applying part 311, such as a linear encoder.

[0085] Embodiment 2

[0086] Based on embodiment 1, the utility model discloses a fluid conveying device.

[0087] Combined Figure 8 and Figure 9 the contents shown, the fluid conveying device comprises the valve 100 and the pumping component 200 described in the foregoing embodiment 1. The pumping component 200 has a pumping port 201 for pumping fluid, and the pumping port 201 of the pumping component 200 is in communication with multiple valve cavities 11 in the valve body 10 through the common flow channel 12 in the valve body 10. The pumping component 200 can be but is not limited to a plunger pump or other pumps suitable for pumping fluid. When the pumping component 200 is a plunger pump, the plunger of the plunger pump can extend into the common flow channel 12 to achieve the purpose that the pumping port 201 is in communication with the multiple valve cavities 11 through the common flow channel 12.

[0088] Therefore, according to the contents described in embodiment 1, when the valve port 111 of one of the valve cavities 11 on the valve body 10 is opened to make the branch flow channel 13 corresponding to the valve cavity 11 in communication with the common flow channel 12, the pumping component 200 can transfer fluid in the communicated branch flow channel 13 and common flow channel 12.

[0089] It can be understood that the fluid conveying device disclosed in embodiment 2 of the utility model adopts the valve 100 described in the foregoing embodiment 1, so that the fluid pumping device at least has the beneficial effects of the valve 100 described in the foregoing embodiment 1. Specifically, when the fluid pumping device is applied to the known Manifold system, it can effectively replace the valves and pumps on each flow path in the known Manifold system, thereby effectively simplifying the complexity of the overall structure of the Manifold system integrated with valve pump products, reducing the volume of the overall structure, and improving the integration of the overall structure.

[0090] Meanwhile, in combination with the foregoing content shown in the embodiment 1, it can be known that the valve 100 disclosed in the embodiment 1 only needs to be provided with one controller 60 to effectively control the valve 100 to switch the flow path, and thus, compared with the valve on each flow path in the known Manifold system needing to be separately provided with a control circuit on a control circuit board such as a PCBA, only one set of control circuit matched with the valve 100 needs to be arranged on the controller 60, so that the free switching of the multiple flow paths can be realized, and the development and use cost is effectively reduced.

[0091] In the embodiment, the pumping component 200 can also be in communication connection with the controller 60 described in the embodiment 1, so as to control the pumping component 200 to work through the controller 60.

[0092] The preferred embodiments of the utility model are merely used for limiting the utility model, and for the person skilled in the art, the utility model can have various changes and variations.Any modification, equivalent replacement, improvement and the like within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A valve, characterized in that The valve comprises: a valve body defining a plurality of valve cavities each containing a valve port; the valve port of each valve cavity faces a first direction; a plurality of openers corresponding to the valve cavities; each opener comprises an opening part aligned with the valve port of the corresponding valve cavity; wherein the plurality of openers are configured to be sequentially and alternately reciprocated along the first direction, so that the valve ports of the plurality of valve cavities are sequentially and alternately opened or closed.

2. The valve of claim 1, wherein Each opener further comprises a force receiving part; the opening part and the force receiving part of each opener are oppositely arranged along the first direction; wherein the force receiving part is used to receive a pressing force for forcing the opener to move along the first direction towards the corresponding valve port; the force receiving parts of the plurality of openers are arranged on the same circumference with the first axis extending along the first direction as the center. The valve further comprises a power assembly, which comprises: a force applying part having a force applying surface opposite to the force receiving parts of the plurality of openers; the force applying surface is annularly closed, and at least part of the force applying surface is distributed at different height positions in the first direction; and the force applying surface is configured to rotate in a plane perpendicular to the first direction around the first axis, so that the part of the force applying surface located at the lowest position in the first direction can sequentially and alternately press the force receiving parts of the openers, thereby sequentially and alternately applying the pressing force to the force receiving parts of the openers through the rotation of the force applying surface; a resilient part used to elastically keep the openers at a position where the opening part does not close the corresponding valve port.

3. The valve of claim 2, wherein The force applying surface is a curved surface extending along the rotation path of the force applying surface and then closed; The force receiving part of the opener and the force applying surface are in point contact.

4. The valve of claim 2, wherein The opener further comprises: a sliding sleeve configured to freely slide along the first direction; one end of the sliding sleeve serves as the force receiving part; an opening rod, one end of the opening rod serves as the opening part, and the other end of the opening rod extends from the other end of the sliding sleeve to the inside of the sliding sleeve along the first direction; the opening rod and the sliding sleeve are in sliding fit; a buffer spring arranged inside the sliding sleeve; two ends of the buffer spring are connected to the sliding sleeve and the opening rod respectively.

5. The valve of claim 2, wherein The valve further comprises a position detection component; the position detection component is configured to detect the rotation position of the force applying surface when the force applying surface rotates.

6. The valve of claim 5, wherein The power assembly further comprises a driving component; the force applying part is in transmission connection with the driving component; The valve further comprises a controller; the driving component and the position detection component are in communication connection with the controller.

7. The valve of claim 5, wherein The position detection component comprises a code disc and an identification optical coupler matched with the code disc; The code disc is configured to rotate coaxially with the force applying surface; the identification optical coupler is fixedly arranged beside the code disc.

8. The valve of claim 1, wherein The valve further comprises a sealing part corresponding to each valve cavity; the sealing part comprises: a diaphragm positioned in the corresponding valve cavity and located between the valve port in the valve cavity and the opening part; wherein the opening part is connected to the diaphragm.

9. The valve of claim 1, wherein The valve body is further provided with a common flow channel and a plurality of branch flow channels corresponding to the valve cavities; Each valve cavity is in communication with the common flow channel; each branch flow channel is in communication with the valve port in the corresponding valve cavity.

10. A fluid delivery device, characterized by, The valve comprises a pumping component and the valve as claimed in any one of claims 1 to 9; The pumping port of the pumping component is in communication with the plurality of valve cavities in the valve body.

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