Fluid control component
By designing a fluid control component including a shell, valve plate, valve core, diaphragm and reset component, dynamically adjusting the flow cross-section, the problem of unbalanced flow in the face of body position changes is solved, a relatively balanced flow control is achieved, and equipment cost and failure rate of electronic control components are reduced.
Patent Information
- Application Number
- CN202421562210.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-07-03
AI Technical Summary
When traditional fluid control components face factors such as changes in the patient's position, they cause frequent changes in fluid pressure, which leads to unbalanced flow. In the prior art, high-sensitivity pressure sensors are relied on, resulting in expensive equipment and shorter life of electronic control components.
A fluid control component including a housing, valve plate, valve core, diaphragm and resetting component is designed. Through the cooperation of the diaphragm and resetting component, the position of the valve core is dynamically adjusted, thereby changing the flow cross-section and achieving balanced control of flow.
It effectively reduces the impact of pressure fluctuations in body fluids on flow rate, ensures that the liquid is drawn out with a relatively balanced flow rate, avoids the use of high-cost pressure sensors and electronic control components, and extends the life of the equipment.
Smart Images
Figure CN222889234U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical instruments, in particular to a fluid control component for controlling the flow rate of a fluid. Background Art
[0002] A fluid control component is provided on the drainage tube of the drainage device used for drainage, and the fluid control component is used to control the flow rate of the transferred fluid. The conventional fluid control component that uses mechanical means to control the flow rate has the following defects: the pressure of the upstream fluid (the fluid upstream of the control component) changes frequently due to factors such as changes in the patient's body position, however, since the flow cross section of the valve port used to limit the flow rate of the fluid in the control component is constant, the flow rate of the fluid passing through the control component is different, which in turn causes the drainage device to be unable to drain evenly.
[0003] In order to ensure that the fluid is drained evenly as much as possible, the prior art provides a fluid control component that uses a pressure sensor to collect pressure and adjust the flow cross section of the valve port. Specifically, the pressure sensor is used to collect the pressure of the upstream fluid. If the pressure increases, the flow cross section of the valve port is reduced, and if the pressure decreases, the flow cross section of the valve port is increased, so as to balance the flow of the fluid. However, this fluid control component still has the following defects: 1. Because the pressure of the fluid belongs to low-pressure fluid, it is necessary to use a pressure sensor with extremely high sensitivity, otherwise the accurate pressure value cannot be collected, and therefore, such a fluid control valve is expensive; 2. Real-time collection of fluid pressure will result in a shorter life of related electronic control components such as sensors and an increased probability of failure. Utility Model Content
[0004] In view of the above technical problems existing in the prior art, an embodiment of the utility model provides a fluid control component.
[0005] In order to solve the above technical problems, the technical solution adopted in the embodiment of the utility model is:
[0006] A fluid control component, comprising:
[0007] A housing having a liquid inlet interface and a liquid outlet interface, wherein the liquid inlet interface and the liquid outlet interface are connected to a drainage tube;
[0008] a valve plate, which is horizontally placed in the shell and divides the shell into an upstream chamber and a downstream chamber, the liquid inlet interface is connected to the upstream chamber, the liquid outlet interface is connected to the downstream chamber, and a valve port connecting the upstream chamber and the downstream chamber is formed on the valve plate;
[0009] A valve core, which defines with the valve port a flow cross section allowing the fluid to flow from the upstream chamber to the downstream chamber, and the valve core can change the flow cross section by moving;
[0010] a diaphragm, which is arranged in the downstream cavity and separates a force-applying cavity from the downstream cavity, wherein the force-applying cavity is connected to a drainage pipe upstream of the liquid inlet interface through a branch, so that the pressure of the fluid drawn from the drainage pipe to the force-applying cavity forces the diaphragm to drive the valve core in a direction that reduces the flow cross section;
[0011] A reset component is used to apply force to the valve core in a direction to increase the flow cross section.
[0012] Preferably,
[0013] The valve core passes through the valve port, and a guide groove extending in the axial direction is opened on the outer peripheral surface of the valve core. The guide groove has a reduction section with a reduced cross-section in the direction from the upstream cavity toward the downstream cavity. The guide groove and the inner wall of the valve port define the flow cross-section. The diaphragm drives the valve core toward the upstream cavity, thereby reducing the flow cross-section defined by the reduction section and the inner wall of the valve port.
[0014] Preferably, the valve core is located at the end of the upstream cavity to form a limit platform, and the limit platform limits the valve core from withdrawing from the valve port.
[0015] Preferably, micropores are provided on the diaphragm, and the micropores allow the fluid in the force-applying chamber to enter the downstream chamber.
[0016] Preferably, a circular plate is attached to the end of the valve core located in the downstream chamber, and a middle portion of the diaphragm is attached to the circular plate.
[0017] Preferably, the reset component is a spring, which is disposed in the upstream cavity and is used to apply elastic force to the valve core.
[0018] Preferably, the reset component is a magnetic component, which includes a first magnetic piece and a second magnetic piece; the first magnetic piece is arranged at the end of the valve core located in the upstream cavity, and the second magnetic piece is arranged on the shell and is opposite to the first magnetic piece with the same pole.
[0019] Preferably, a countersunk hole is arranged on the housing opposite to the end of the valve core located in the upstream cavity, an adjusting component is screwed into the countersunk hole, and the second magnetic sheet is arranged on the adjusting component.
[0020] Preferably, a stop platform is formed at the bottom of the counterbore, and the stop platform is used to limit the movement displacement of the valve core.
[0021] Preferably, the guide grooves include a plurality of guide grooves arranged circumferentially.
[0022] Compared with the prior art, the fluid control component disclosed in the utility model has the following beneficial effects:
[0023] The fluid control component provided by the utility model can reduce the influence of the pressure fluctuation of the body fluid on the flow rate of the body fluid, thereby enabling the liquid to be always drawn out at a relatively balanced flow rate.
[0024] The overview of various implementations or examples of the technology described in this utility model is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In the drawings that are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar parts. The accompanying drawings generally illustrate various embodiments by way of example and not limitation, and together with the specification and claims, are used to illustrate the embodiments of the utility model. When appropriate, the same reference numerals are used in all drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive embodiments of the present device or method.
[0026] Figure 1 This is a main cross-sectional view of a fluid control component provided in an embodiment of the utility model.
[0027] Figure 2 This is a schematic diagram of the three-dimensional structure of a valve core in a fluid control component provided in an embodiment of the utility model.
[0028] Figure 3 A state view of a valve core in a fluid control component provided by an embodiment of the utility model being at a low limit position.
[0029] Figure 4 A state view of a valve core in a fluid control component provided by an embodiment of the utility model at a high limit position.
[0030] Reference numerals:
[0031] 10-housing; 11-upstream cavity; 12-downstream cavity; 13-force-applying cavity; 14-liquid inlet interface; 15-liquid outlet interface; 16-auxiliary interface; 17-stop platform; 20-valve plate; 21-valve port; 30-valve core; 31-guide groove; 311-contraction section; 40-diaphragm; 41-micropore; 50-circular plate; 60-drainage tube; 61-branch; 71-first magnetic sheet; 72-second magnetic sheet; 73-adjusting component. DETAILED DESCRIPTION
[0032] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0033] In order to keep the following description of the embodiments of the present invention clear and concise, the present invention omits detailed descriptions of known functions and known components.
[0034] like Figure 1 and Figure 2 As shown, the fluid control component includes: a housing 10, a valve plate 20, a valve core 30, a diaphragm 40 and a reset component.
[0035] The shell 10 is roughly in the shape of a flat column, and has a flat columnar cavity inside the shell 10. The valve plate 20 is placed horizontally in the shell 10 and divides the flat columnar cavity of the shell 10 into an upstream cavity 11 and a downstream cavity 12; the side of the shell 10 corresponding to the upstream cavity 11 is provided with a liquid inlet interface 14, and the liquid inlet interface 14 is connected to the upstream cavity 11, and the side of the shell 10 corresponding to the downstream cavity 12 is provided with a liquid outlet interface 15, and the liquid outlet interface 15 is connected to the downstream cavity 12; a valve port 21 is opened in the middle of the valve plate 20, and the valve port 21 connects the upstream cavity 11 with the downstream cavity 12. The liquid inlet interface 14 and the liquid outlet interface 15 are both connected to a drainage tube 60 for drainage, which is used to drain body fluids in the patient (such as liver effusion, cerebral effusion, etc.) to the outside of the body or other locations of the patient. During the drainage process, the body fluid enters the upstream cavity 11 from the liquid inlet interface 14, then flows into the downstream cavity 12 through the valve port 21, and then flows out from the liquid outlet interface 15.
[0036] The valve core 30 is generally cylindrical in shape, and the valve core 30 passes through the valve port 21 of the valve plate 20. The valve core 30 has an upstream end extending into the upstream cavity 11 and a downstream end extending into the downstream cavity 12, and the valve core 30 can move axially under the limitation of the valve port 21. A circular plate 50 is detachably attached to the downstream end of the valve core 30.
[0037] The diaphragm 40 is configured to be circular and flexible. In some preferred structures, the diaphragm 40 is configured to have elastic characteristics. The diaphragm 40 is placed horizontally in the downstream chamber 12 and separates the force chamber 13 from the downstream chamber 12. In addition, the middle part of the diaphragm 40 is attached to the circular plate 50, so that the diaphragm 40 can drive the valve core 30 to move toward the upstream chamber 11 by deforming in the direction of the downstream chamber 12. A secondary interface 16 is provided at a position corresponding to the force-applying chamber 13 of the shell 10, and a branch 61 is led out from the drainage tube 60 upstream of the liquid inlet interface 14 to be connected to the secondary interface 16, so that the body fluid in the drainage tube 60 can enter the force-applying chamber 13 through the branch 61. The body fluid entering the force-applying chamber 13 applies pressure to the diaphragm 40 so that the diaphragm 40 can be deformed toward the downstream chamber 12, and then converted into a thrust on the valve core 30. When the pressure of the body fluid increases, the thrust on the valve core 30 increases, and when the pressure of the body fluid decreases, the thrust on the valve core 30 decreases.
[0038] The reset component is used to apply force to the valve core 30, and the direction of the force applied by the reset component to the valve core 30 is opposite to the direction of the force applied by the body fluid to the valve core 30. In this way, when the pressure of the body fluid increases and the thrust on the valve core 30 increases, the pressure of the body fluid overcomes the reset component and causes the valve core 30 to move toward the upstream cavity 11. When the pressure of the body fluid decreases and the thrust on the valve core 30 decreases, the reset component causes the valve core 30 to move toward the downstream cavity 12.
[0039] In some embodiments, the reset component may be a spring disposed in the upstream cavity 11, and the spring acts on the upstream end of the valve core 30 to apply elastic force to the valve core 30. In some preferred embodiments, the reset component is two magnetic sheets, that is, a first magnetic sheet 71 and a second magnetic sheet 72, the first magnetic sheet 71 is disposed at the upstream end of the valve core 30, the second magnetic sheet 72 is disposed on the housing 10 and is opposite to the first magnetic sheet 71, and the same magnetic poles of the first magnetic sheet 71 and the second magnetic sheet 72 are opposite, so that a magnetic repulsion force is formed between the first magnetic sheet 71 and the second magnetic sheet 72, and a magnetic force is applied to the valve core 30 in the direction of the downstream cavity 12 by using the magnetic repulsion force. The advantage of using a magnetic sheet to apply force to the valve core 30 compared to a spring is that the two magnetic sheets can apply force without contacting each other.
[0040] In the present utility model, if Figure 1 and Figure 2As shown, a plurality of guide grooves 31 extending axially and arranged circumferentially are provided on the outer peripheral surface of the valve core 30, the inner wall of the valve port 21 and the guide grooves 31 define a flow cross-section allowing fluid (body fluid) to pass through, and the guide grooves 31 have a contraction section 311 whose cross-section decreases from the upstream cavity 11 toward the downstream cavity 12. In this way, when the valve core 30 moves toward the upstream cavity 11 and the contraction section 311 passes through the lower port of the valve port 21, the flow cross-section defined by the guide grooves 31 and the valve port 21 decreases, and when the valve core 30 moves toward the downstream cavity 12 and the contraction section 311 passes through the lower port of the valve port 21, the flow cross-section defined by the guide grooves 31 and the valve port 21 increases.
[0041] Based on the above, it can be known that when the pressure of the body fluid upstream of the fluid control component increases due to changes in the patient's body position or other reasons, the thrust of the body fluid on the valve core 30 increases to overcome the reset component and move the valve core 30 toward the upstream cavity 11, and the flow cross section decreases, thereby suppressing the increase in the flow of body fluid passing through the valve port 21; and when the pressure of the body fluid upstream of the fluid control component decreases due to changes in the patient's body position or other reasons, the thrust of the body fluid on the valve core 30 decreases, the reset component causes the valve core 30 to move toward the downstream cavity 12, and the flow cross section increases, thereby reducing the suppression of the body fluid. Therefore, the fluid control component provided by the utility model can reduce the influence of the pressure fluctuation of the body fluid on the flow of the body fluid, thereby allowing the liquid to always be drawn out at a more balanced flow rate.
[0042] In some preferred structures, such as Figure 1 As shown, a micropore 41 is provided on the diaphragm 40, and the micropore 41 allows the body fluid in the force-applying chamber 13 to enter the downstream chamber 12, and flow out from the liquid outlet interface 15 together with the body fluid that enters the downstream chamber 12 from the valve port 21. The advantage of providing the micropore 41 is that the body fluid in the force-applying chamber 13 is continuously circulated to avoid being always retained in the force-applying chamber 13.
[0043] In some preferred structures, such as Figure 1 As shown, the distance between the two magnetic sheets is configured to be adjustable. Specifically, a sink is provided on the shell 10, and an adjusting component 73 is screwed into the sink hole. The first magnetic sheet 71 is arranged on the adjusting component 73. The distance between the first magnetic sheet 71 and the second magnetic sheet 72 can be adjusted by screwing the adjusting component 73. In this way, the distance between the first magnetic sheet 71 and the second magnetic sheet 72 can be adjusted, so that the magnetic force can be compared with the pressure of the body fluid to adjust the position of the valve core 30 under a certain pressure, thereby adjusting the size of the corresponding flow cross section, and then adjusting the flow rate of the body fluid through the valve port 21 under the pressure.
[0044] In some preferred structures, the valve core 30 is located at the end of the upstream cavity 11 to form a limit platform, which limits the valve core 30 from withdrawing from the valve port 21. Figure 3As shown, another function of the limit platform is to limit the downward movement limit position of the valve core 30, so that when the pressure of the body fluid drops to a certain level, the valve core 30 moves downward to the limit position so that the flow cross section no longer changes.
[0045] In some preferred structures, a stopper 17 is formed at the bottom of the counterbore, such as Figure 4 As shown, the stop platform 17 is used to limit the polar position of the valve core 30 moving upward, so that when the pressure of the body fluid rises to a certain level, the valve core 30 moves upward to the limit position so that the flow cross section no longer changes.
[0046] In addition, although exemplary embodiments have been described in the present invention, the scope includes any and all embodiments based on the present invention with equivalent elements, modifications, omissions, combinations (e.g., various embodiments intersecting schemes), adaptations or changes. The elements in the claims will be interpreted broadly based on the language adopted in the claims, and are not limited to the examples described in this specification or during the implementation of this application, and the examples will be interpreted as non-exclusive. Therefore, this specification and examples are intended to be considered as examples only, and the true scope and spirit are indicated by the following claims and the full scope of their equivalents.
[0047] The above description is intended to be illustrative rather than restrictive. For example, the above examples (or one or more of them) can be used in combination with each other. For example, a person of ordinary skill in the art can use other embodiments when reading the above description. In addition, in the above-mentioned specific embodiments, various features can be grouped together to simplify the utility model. This should not be interpreted as an intention that a disclosed feature that is not required to be protected is necessary for any claim. On the contrary, the subject matter of the utility model may be less than all the features of a specific disclosed embodiment. Thus, the following claims are incorporated into the specific embodiments as examples or embodiments, wherein each claim is independently used as a separate embodiment, and it is considered that these embodiments can be combined with each other in various combinations or arrangements. The scope of the utility model should be determined with reference to the attached claims and the full scope of equivalent forms granted by these claims.
[0048] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.
Claims
1. A fluid control component, characterized in that: include: A housing having a liquid inlet interface and a liquid outlet interface, wherein the liquid inlet interface and the liquid outlet interface are connected to a drainage tube; a valve plate, which is horizontally placed in the shell and divides the shell into an upstream chamber and a downstream chamber, the liquid inlet interface is connected to the upstream chamber, the liquid outlet interface is connected to the downstream chamber, and a valve port connecting the upstream chamber and the downstream chamber is formed on the valve plate; A valve core, which defines with the valve port a flow cross section allowing the fluid to flow from the upstream chamber to the downstream chamber, and the valve core can change the flow cross section by moving; a diaphragm, which is arranged in the downstream cavity and separates a force-applying cavity from the downstream cavity, wherein the force-applying cavity is connected to a drainage pipe upstream of the liquid inlet interface through a branch, so that the pressure of the fluid drawn from the drainage pipe to the force-applying cavity forces the diaphragm to drive the valve core in a direction that reduces the flow cross section; A reset component is used to apply force to the valve core in a direction to increase the flow cross section.
2. The fluid control component according to claim 1, characterized in that: The valve core passes through the valve port, and a guide groove extending in the axial direction is opened on the outer peripheral surface of the valve core. The guide groove has a reduction section with a reduced cross-section in the direction from the upstream cavity toward the downstream cavity. The guide groove and the inner wall of the valve port define the flow cross-section. The diaphragm drives the valve core toward the upstream cavity, thereby reducing the flow cross-section defined by the reduction section and the inner wall of the valve port.
3. The fluid control component according to claim 2, characterized in that: The valve core is located at the end of the upstream cavity to form a limiting platform, and the limiting platform limits the valve core from withdrawing from the valve port.
4. The fluid control component according to claim 1, characterized in that: The diaphragm is provided with micropores, and the micropores enable the fluid in the force-applying chamber to enter the downstream chamber.
5. The fluid control component according to claim 1, characterized in that: A circular plate is attached to the end of the valve core located in the downstream chamber, and the middle part of the diaphragm is attached to the circular plate.
6. The fluid control component according to claim 1, characterized in that: The reset component is a spring, which is arranged in the upstream cavity and is used to apply elastic force to the valve core.
7. The fluid control component according to claim 1, characterized in that: The reset component is a magnetic component, which includes a first magnetic piece and a second magnetic piece; the first magnetic piece is arranged at the end of the valve core located in the upstream cavity, and the second magnetic piece is arranged on the housing and is opposite to the first magnetic piece with the same pole.
8. The fluid control component according to claim 7, characterized in that: A countersunk hole is arranged on the shell body opposite to the end of the valve core located in the upstream cavity, an adjusting component is screwed on the countersunk hole, and the second magnetic sheet is arranged on the adjusting component.
9. The fluid control component according to claim 8, characterized in that: A stop platform is formed at the bottom of the counterbore, and the stop platform is used to limit the movement displacement of the valve core.
10. The fluid control component according to claim 2, characterized in that: The guide grooves include a plurality of guide grooves arranged circumferentially.