WO2023029208A1 - 一种切换阀、稳压泵及水刀设备 - Google Patents

一种切换阀、稳压泵及水刀设备 Download PDF

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Publication number
WO2023029208A1
WO2023029208A1 PCT/CN2021/129250 CN2021129250W WO2023029208A1 WO 2023029208 A1 WO2023029208 A1 WO 2023029208A1 CN 2021129250 W CN2021129250 W CN 2021129250W WO 2023029208 A1 WO2023029208 A1 WO 2023029208A1
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WIPO (PCT)
Prior art keywords
valve
outlet
inlet
communication port
water
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PCT/CN2021/129250
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English (en)
French (fr)
Inventor
孙光宇
吴衍
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惠州海卓科赛医疗有限公司
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Publication of WO2023029208A1 publication Critical patent/WO2023029208A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/04—Check valves with guided rigid valve members shaped as balls
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M3/00—Medical syringes, e.g. enemata; Irrigators
    • A61M3/02—Enemata; Irrigators
    • A61M3/0233—Enemata; Irrigators characterised by liquid supply means, e.g. from pressurised reservoirs
    • A61M3/0254—Enemata; Irrigators characterised by liquid supply means, e.g. from pressurised reservoirs the liquid being pumped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/12—Valves; Arrangement of valves arranged in or on pistons
    • F04B53/125—Reciprocating valves
    • F04B53/129—Poppet valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0209—Check valves or pivoted valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0245—Construction of housing; Use of materials therefor of lift valves with ball-shaped valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0263—Construction of housing; Use of materials therefor of lift valves multiple way valves

Definitions

  • the present application relates to the technical field of medical pump bodies, in particular to a switching valve, a pressure stabilizing pump and water jet equipment.
  • Medical waterjet equipment uses high-pressure injection of physiological saline to remove traumatic wounds, chronic wounds and other soft tissue injuries. Harm healthy tissue and help facilitate the healing process.
  • the pressure-stabilizing pump that provides high-pressure water flow plays a pivotal role in the entire medical waterjet equipment.
  • one end of the one-way valve chamber and the valve core can be in contact with the valve core to seal and block the water flow, generally in the form of a cone; the other end can move on the valve core. When reaching this position, the water flow can still pass through.
  • components such as raised convex surfaces or springs are often used in the valve cavity to lift the valve core to the inside of the valve cavity, so that the valve core cannot be in contact with the valve cavity.
  • the connecting ports of the valves are tightly combined, unable to form a blocking surface, and then keep unimpeded.
  • this method of jacking up the spool inwards is difficult to process the special shape because the spool is small, and its precision has an important impact on whether the spool can ensure the flow of water. Therefore, the processing The accuracy is difficult to guarantee; on the other hand, when the valve core hits the raised structure under the action of high-speed water flow, it is easy to cause damage to the valve core; after long-term use, the raised part is also easy to be ground, and the raised part After grinding, the spool will become easy to block the passage here, and lose the function of one-way conduction.
  • the purpose of this application is to provide a switching valve, a pressure stabilizing pump and a water jet device, which are simpler to manufacture, less likely to lose the one-way conduction function due to wear and other reasons, and have a long service life.
  • a switching valve having:
  • a fluid channel the two ends of the fluid channel are provided with a first inlet and a second inlet and outlet, the fluid channel includes a valve cavity, and a valve core is movable in the valve cavity;
  • the first end of the valve chamber is provided with a first communication port, and the first communication port communicates with the first inlet and outlet;
  • the second end of the valve chamber is provided with a second communication port, and the second The communication port communicates with the second inlet and outlet; there is a sealing surface in the valve chamber near the first communication port, and the center of the second communication port is misaligned with the central axis of the valve chamber;
  • the pressure difference between the first port and the second port can make the valve core switch between the first position and the second position; when the pressure of the first port is greater than the pressure of the second port , the valve core moves to the second position, the first inlet and outlet communicate with the second inlet and outlet through the first communication port, the valve cavity and the second communication port in turn, and the fluid channel open; when the pressure of the first inlet and outlet is lower than the pressure of the second inlet and outlet, the spool moves to the first position, the spool and the sealing surface cooperate to seal, and the valve cavity and the The first inlet and outlet are disconnected, and the fluid channel is closed.
  • first communication port and the valve cavity are concentrically opened on the first end, and the valve core is in the shape of a ball, a spindle or a truncated cone.
  • the side wall of the valve cavity that is closer to the second communication port is the abutment side, and the distance from the abutment side to the center of the second communication port is the abutment distance, and the abutment The distance is smaller than the radius of the valve core; the distance between the abutting side and the center of the first communication port is an anti-collision distance, and the anti-collision distance is greater than the radius of the valve core.
  • the fluid channel includes an upper fluid channel and a lower fluid channel
  • the upper fluid channel includes a first upper inlet and outlet, a second upper inlet and outlet, a first upper communication port, an upper valve chamber, an upper valve core and a second upper communication port
  • the lower fluid channel includes a first lower inlet, a second lower inlet, a first lower communication port, a lower valve cavity, a lower valve core and a second lower communication port;
  • the first upper port communicates with the first lower port or the second upper port communicates with the second lower port, the sealing surface of the upper valve cavity is opposite to the sealing surface of the lower valve cavity, when the upper fluid channel is opened, the lower Fluid channel is closed.
  • the water inlet valve and a water outlet valve both of which have the upper fluid channel and the lower fluid channel; the first upper inlet and outlet of the water inlet valve communicate with the first lower inlet and outlet , the second upper inlet and outlet of the water outlet valve are connected with the second lower inlet and outlet; the second upper inlet and outlet of the water inlet valve are connected with the first upper inlet and outlet of the water outlet valve, and the second lower inlet and outlet of the water inlet valve are connected with the second lower inlet and outlet of the water inlet valve.
  • the first lower inlet and outlet of the water outlet valve are connected.
  • the difference between the cross-sectional area of the valve cavity and the maximum cross-sectional area of the valve core is S1
  • the minimum cross-sectional area of the fluid channel is S2
  • the S1 is 0.1 to 2 times of S2.
  • the S1 is equal to the S2.
  • the water outlet valve also includes a water outlet channel for discharging water out of the valve, the second upper inlet and outlet and the second lower outlet merge into the water outlet channel, and the cross-sectional area of the water outlet channel is the S2 .
  • the abutment distance is greater than the radius of the second upper communication port and the second lower communication port, and the abutment distance is smaller than the radius of the valve cavity.
  • the area of the second upper communication port and the second lower communication port is not less than the difference between the cross-sectional area of the valve chamber and the maximum cross-sectional area of the valve core.
  • the axial movement distance of the valve cavity in the valve cavity is 0.1 to 2 times the radius of the second upper communication port and the second lower communication port.
  • the sealing surface is a conical surface, and the included angle of the axial projection of the conical surface is ⁇ , and the value range of the included angle is 30° ⁇ 180°; the second end surface is a plane.
  • the upper fluid channel and the lower fluid channel are vertically symmetrically arranged.
  • a pressure stabilizing pump comprising a pump body and the switching valve
  • the pump body includes an upper piston chamber and a lower piston chamber
  • the second upper inlet and outlet of the water inlet valve and the first upper inlet and outlet of the water outlet valve are in communication with the upper piston cavity, and the second lower inlet and outlet of the water inlet valve and the first lower inlet and outlet of the water outlet valve are connected with the upper piston chamber.
  • the piston chamber below is connected.
  • a water jet device including the pressure stabilizing pump.
  • a switching valve, a pressure stabilizing pump and a water jet device in the present application have the following beneficial effects:
  • the first inlet and outlet and the second inlet and outlet in the communication channel are used to enter and exit the fluid, and form a pressure difference;
  • the valve cavity communicates with the first inlet and the second inlet and outlet respectively through the first communication port and the second communication port at both ends,
  • the pressure difference between the inlet and outlet and the second inlet and outlet causes the valve core to switch between the first position and the second position, so that the fluid channel switches between open and closed states.
  • the valve core moves to the second position.
  • the second communication port is located on one side of the valve cavity.
  • the first communication port, the valve chamber and the second communication port are in communication with the second port, and the fluid channel is opened; when the pressure of the first port is lower than the pressure of the second port, the The valve core moves to the first position, the valve core cooperates with the sealing surface to seal, the valve chamber is disconnected from the first inlet and outlet, and the fluid channel is closed.
  • the switching valve, the pressure stabilizing pump and the water knife equipment in this application can realize the effect of one-way conduction by setting the offset second communication port on it, which can avoid the complicated setting at the second end of the valve cavity.
  • Structures such as protrusions or additional springs are simpler to manufacture, less damage to the valve core and valve chamber during use, and longer service life.
  • Fig. 1 is a partial cross-sectional schematic diagram of a switching valve of the present application when the fluid channel is in an open state;
  • Fig. 2 is a partial cross-sectional schematic diagram of a switching valve of the present application when the fluid channel is in a closed state;
  • Fig. 3 is the enlarged view of place C in Fig. 1;
  • Fig. 4 is the side view of a kind of pressure stabilizing pump of the present application.
  • Fig. 5 is the cross-sectional view of the first state at A-A place in Fig. 4 of the present application;
  • Fig. 6 is the cross-sectional view of the first state at the B-B place in Fig. 4 of the present application;
  • Fig. 7 is a cross-sectional view of the second state at A-A in Fig. 4 of the present application.
  • Fig. 8 is the cross-sectional view of the second state at B-B in Fig. 4 of the present application.
  • Fig. 9 is an exploded view of a voltage stabilizing pump of the present application.
  • Fig. 10 is a perspective view of a stabilizing pump of the present application.
  • first and second are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as “first” and “second” may explicitly or implicitly include one or more of these features. In the description of the present application, unless otherwise specified, "plurality” means two or more.
  • a switching valve having:
  • a fluid channel 4 the two ends of the fluid channel 4 are provided with a first inlet and outlet 41 and a second inlet and outlet 42, the fluid channel 4 includes a valve cavity 44, and a valve core 45 is movable in the valve cavity 44;
  • the first end of the valve chamber 44 is provided with a first communication port 43 , and the first communication port 43 communicates with the first inlet and outlet 41 ;
  • the second end of the valve chamber 44 is provided with a second communication port 46 , and the second communication port 46 communicates with the second port 42;
  • the valve cavity 44 has a sealing surface 441 close to the first communication port 43, and the center of the second communication port 46 is in contact with the The central axis of the valve cavity 44 is misaligned;
  • the pressure difference between the first port 41 and the second port 42 can make the valve core switch between the first position and the second position
  • the first inlet and outlet 41 and the second inlet and outlet 42 in the communication channel are used to enter and exit the fluid, and form a pressure difference;
  • the valve chamber 44 is connected to the first inlet and outlet 41 and the second outlet through the first communication port 43 and the second communication port 46 at both ends, respectively. 42, the pressure difference between the first port 41 and the second port 42 makes the valve core switch between the first position and the second position, so that the fluid channel 4 is between the open and closed states switch.
  • the valve core moves to the second position.
  • the second communication port 46 is located on one side of the valve cavity 44, when the valve core 45 is in contact with the second end of the valve cavity 44 under the action of pressure, it will not directly touch the edge of the second communication port 46 to form a seal state, the first inlet and outlet 41 are connected to the second inlet and outlet 42 through the first communication port 43, the valve cavity 44 and the second communication port 46 in turn, and the fluid channel 4 is opened; when the first When the pressure of the first port 41 is lower than the pressure of the second port 42, the valve core moves to the first position, the valve core cooperates with the sealing surface 441 to seal, and the valve cavity 44 and the second port A port 41 is disconnected, and the fluid channel 4 is closed.
  • the first communication port 43 and the valve cavity 44 are concentrically opened on the first end, and the second communication port 46 and the valve cavity 44 are eccentrically opened on the first end. on both ends.
  • the central axis of 44 and the central axis of the second communication port 46 are all staggered, so as to prevent the valve core 45 from buckling and sealing on the second communication port 46 when it moves to the second position.
  • the spool 45 in this embodiment is preferably spherical, spindle-shaped or truncated cone, so as to fit the sealing surface on the first communication port 43 and avoid blocking the second communication port 46 better.
  • This distance has ensured that when the spool 45 moves to the second position, the lower end of the spool 45 can only touch the inner side of the second end of the valve cavity 44 because it is larger than the second communication port 46, without blocking the second port.
  • fluid can flow from around the valve core 45 into the second communication port 46 , and then flow out of the valve cavity 44 .
  • the distance between the abutting side 442 and the center of the first communication port 43 is the anti-collision distance L1, and the anti-collision distance L1 is greater than the radius r1 of the spool 45, and this distance ensures that when the spool 45 moves When it reaches the first position, it can be completely attached to the sealing surface 441 without being unable to attach due to the obstruction of the inner wall of the valve chamber 44 .
  • the two sets of dimensional relationships enable the valve cavity 44 and the valve core 45 in this embodiment to achieve one-way conduction under the push of pressure difference without resorting to other structures.
  • the manufacture is simple and convenient, and requires less precision.
  • the abutment distance L2 is greater than the radius r2 of the second upper communication port 4e6 and the second lower communication port 4f6 , and the abutment distance L2 is smaller than the radius r3 of the valve cavity 44 .
  • the abutting distance L2 reflects the offset degree of the second upper communication port 4e6 and the second lower communication port 4f6 relative to the valve chamber 44. When the offset degree is too large, the direction of the water flow will change greatly, which will increase the resistance and turbulence of the water flow.
  • the spool 45 will easily block most of the second upper communication port 4e6 or the second lower communication port 4f6 , making the water flow too large and the pressure too high.
  • the value in this embodiment can make the flow direction of the water flow more controllable and the direction of the water flow more stable, making the movement of the valve core 45 in the valve cavity 44 more controllable; Or the second lower communication port 4f6 is blocked, which can ensure the normal flow of water between the valve cavity 44 and the second upper communication port 4e6 or the second lower communication port 4f6.
  • the fluid channel 4 includes an upper fluid channel 4e and a lower fluid channel 4f
  • the upper fluid channel 4e includes a first upper inlet and outlet 4e1, a second upper inlet and outlet 4e2, the first upper communication port 4e3, the upper valve chamber 4e4, the upper valve core 4e5 and the second upper communication port 4e6
  • the lower fluid channel 4f includes the first lower port 4f1, the second lower port 4f2, the first lower port 4f3, the lower valve cavity 4f4, the lower valve core 4f5 and the second lower communication port 4f6;
  • the first upper port 4e1 communicates with the first lower port 4f1 or the second upper port 4e2 communicates with the second lower port 4f2 to form two options.
  • the sealing surface 441 of the upper valve cavity 4e4 and the sealing surface of the lower valve cavity 4f4 441 is in the opposite direction, when the upper fluid channel 4e is opened, the lower fluid channel 4f is closed.
  • the first upper inlet and outlet 4e1 and the first lower inlet and outlet 4f1 When the first upper inlet and outlet 4e1 and the first lower inlet and outlet 4f1 are connected, the first upper inlet and outlet 4e1 and the first lower inlet and outlet 4f1 have the function of one-way water intake, and the second upper inlet and outlet 4e2 and the second lower inlet and outlet 4f2 can only Realize the water outlet; when the second upper outlet 4e2 is connected with the second lower outlet 4f2, the second upper outlet 4e2 and the second lower outlet 4f2 have the function of one-way water outlet, and the first upper outlet 4e1 and the first lower outlet 4f1 can only Achieve water ingress.
  • the upper fluid channel 4e and the lower fluid channel 4f are vertically symmetrical.
  • this embodiment includes a water inlet valve 2 and a water outlet valve 3, both of which have the upper fluid passage 4e and the lower fluid passage 4f in the water inlet valve 2 and the water outlet valve 3;
  • the first upper inlet and outlet 4e1 of the valve 2 communicates with the first lower inlet and outlet 4f1, the second upper inlet and outlet 4e2 of the water outlet valve 3 communicates with the second lower inlet and outlet 4f2;
  • the second upper inlet and outlet 4e2 of the water inlet valve 2 communicates with the The first upper port 4e1 of the water outlet valve 3 is connected, and the second lower port 4f2 of the water inlet valve 2 is connected with the first lower port 4f1 of the water outlet valve 3 .
  • the first waterway is:
  • the water flows in from the first upper inlet and outlet 4e1 and/or the first lower inlet and outlet 4f1, and passes through the first upper communication port 4e3, the upper valve chamber 4e4, and the second upper communication port in sequence. 4e6 and the second upper exit 4e2;
  • the second waterway is:
  • the water flows in from the first upper outlet 4e1 and/or the first lower outlet 4f1, and passes through the first lower communication port 4f3, the lower valve chamber 4f4, and the second lower communication port in sequence. 4f6 and the second lower entrance 4f2;
  • the difference between the cross-sectional area of the valve cavity 44 and the maximum cross-sectional area of the valve core 45 is S1
  • the minimum cross-sectional area of the fluid channel 4 is S2
  • S1 is a key parameter to ensure that the water flow is cut off. If S1 is too large, the pressure difference will be insufficient to push the valve core 45 to move; if S1 is too small, this will become the position with the largest pressure difference in the entire switching valve. It is beneficial to the switch of the water inlet valve 2 and the water outlet valve 3.
  • the minimum cross-sectional area of the entire fluid channel 4 is selected as the correlation factor of S1, so that S1 can at least meet the normal flow of the minimum flow channel area, and ensure the normal operation of the entire pressure stabilizing pump system.
  • the value range of the minimum cross-sectional area of the fluid channel 4 is between 0.01 mm 2 and 100 mm 2 , preferably 1 mm 2 to 10 mm 2 , determined according to the overall volume of the switching valve, especially when the switching valve is used for water When it is in the stabilizing pump of the knife, the minimum flow channel area in this range can meet the water jet's requirements for water flow.
  • the water outlet valve 3 also includes a water outlet channel for water out of the valve, the second upper inlet and outlet 4e2 and the second lower outlet 4f2 merge into the water outlet channel, and the outlet of the water outlet channel
  • the cross-sectional area is the S2.
  • the water outlet channel gathers the water flow of the second upper inlet and outlet 4e2 and the second lower inlet and outlet 4f2, and the water flows out from the second upper inlet and outlet 4e2 and the second lower inlet and outlet 4f2 respectively, and then flows into the water outlet channel together, and finally flows out of the valve.
  • the smallest cross-sectional area can increase the water flow rate and pressure.
  • the area of the second upper communication port 4e6 and the second lower communication port 4f6 is not less than the difference between the cross-sectional area of the valve cavity 44 and the maximum cross-sectional area of the valve core 45 .
  • the flow area of the water flow in the valve chamber 44 will not be smaller than the flow area after flowing out from the second upper communication port 4e6 and the second lower communication port 4f6, the flow rate of the water flow can be guaranteed, and the pressure will not increase when it exits the valve chamber 44. Fluid is impeded from flowing out of the valve cavity 44 .
  • the distance that the valve cavity 44 moves axially in the valve cavity 44 is 0.1 times to 10 times the radius of the second upper communication port 4e6 and the second lower communication port 4f6. times, preferably 0.1 to 2 times.
  • the water jet is used in clinical operations that require high timeliness. Therefore, when the water jet equipment is turned on, the injected water needs to quickly reach the required water volume and flow rate; when the water jet is turned off, the water delivery can be stopped quickly. High demands are placed on the pump's operating efficiency and responsiveness.
  • the spool 45 blocks the second upper communication port 4e6 and the second lower communication port 4f6 by moving along the axial direction, the greater the distance the spool 45 moves in the axial direction, the more The longer it takes, the longer the response time, which is not conducive to fast response operations.
  • the sealing surface 441 is a conical surface
  • the included angle of the axial projection of the conical surface is ⁇
  • the value range of the included angle is 30° ⁇ 180°
  • the second end surface is plane.
  • This embodiment also provides a pressure stabilizing pump, including a pump body 1 and the switching valve,
  • the pump body 1 includes an upper piston chamber 11 and a lower piston chamber 12, and a piston (not shown) is arranged in the upper piston chamber 11 and the lower piston chamber 12;
  • the second upper inlet and outlet 4e2 of the water inlet valve 2 and the first upper inlet and outlet 4e1 of the water outlet valve 3 communicate with the upper piston chamber 11, the second lower inlet and outlet 4f2 of the water inlet valve 2, the outlet valve
  • the first lower port 4f1 of 3 communicates with the lower piston chamber 12 .
  • the pump body 1 is also provided with two upper ports 13 and two lower ports 14, and the water inlet valve 2 and the water outlet valve 3 each include a set of channels with channels inside.
  • the first joint 51, the second joint 52 and the third joint 53 communicate with each other;
  • the two upper joints 13 are plugged with the first joint 51 on the water inlet valve 2 and the water outlet valve 3 respectively, so as to communicate with the upper piston chamber 11;
  • the lower interface 14 is plugged with the second joint 52 on the water inlet valve 2 and the water outlet valve 3 respectively, so as to communicate with the lower piston chamber 12;
  • the third joint 53 in the water inlet valve 2 is used to enter the Water, the third joint 53 in the water outlet valve 3 is used to discharge water out of the valve.
  • a water jet device including the pressure stabilizing pump.
  • This kind of water jet can be more suitable for the delivery of high-pressure liquid, and has better sealing performance. When it is used in clinical operations, it can obtain a better user experience.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
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Abstract

一种切换阀、稳压泵及水刀设备，切换阀具有：流体通道（4），流体通道（4）的两端设有第一出入口（41）和第二出入口（42），流体通道（4）包括阀腔（44），阀腔（44）内活动设有阀芯（45）；阀腔（44）的第一端设有第一连通口（43），且第一连通口（43）与第一出入口（41）连通；阀腔（44）的第二端设有第二连通口（46），且第二连通口（46）与第二出入口（42）连通；阀腔（44）内靠近第一连通口（43）处具有密封面（441），第二连通口（46）的中心与阀腔（44）的中心轴线错位设置；第一出入口（41）与第二出入口（42）之间的压力差使得阀芯（45）在第一位置和第二位置之间切换从而使得流体通道（4）开启或关闭。

Description

一种切换阀、稳压泵及水刀设备 技术领域
本申请涉及医用泵体技术领域，尤其涉及一种切换阀、稳压泵及水刀设备。
背景技术
随着现代医疗设备的发展，技术越来越成熟的医用水刀设备逐步应用于临床手术中，医用水刀设备利用生理盐水的高压喷射可用于清除创伤伤口、慢性伤口和其它软组织损伤，同时不伤害健康组织，有助于促进康复过程。其中，提供高压水流的稳压泵在整个医用水刀设备中承担着举足轻重的作用。
现有的医用水刀中的稳压泵的切换阀中，单向导通的阀腔和阀芯，其中一端可以与阀芯抵触密封阻断水流，一般呈锥面；另一端可以在阀芯运动到此位置时仍然保持水流能够通过，为了实现这个功能，现有技术中常采用在阀腔内设置凸起的凸面或弹簧等部件，向阀腔内部顶起阀芯，使得阀芯无法与阀腔的连通口紧密结合，无法形成阻断面，进而保持畅通。
但是这种向内顶起阀芯的方案一方面在制造时，由于阀芯较小，在此处进行异形的加工存在困难，其精度对阀芯是否能保证水的流通具有重要影响，因此加工精度难以保证；另一方面，当阀芯在高速水流的作用下撞击在凸起的结构上时，既容易对阀芯造成损伤；长期使用后，凸起部位也容易被磨平，凸起部位磨平后阀芯将变得容易堵塞此处的通道，失去单向导通的功能。
申请内容
为了克服现有技术的一些不足，本申请的目的在于提供一种切换阀、稳压泵及水刀设备，其制造更简单，不容易因为磨损等原因失去单向导通的功能，使用寿命长。
本申请的目的采用如下技术方案实现：
一种切换阀，具有：
流体通道，所述流体通道的两端设有第一出入口和第二出入口，所述流体通道包括阀腔，所述阀腔内活动设有阀芯；
所述阀腔的第一端设有第一连通口，且所述第一连通口与所述第一出入口连通；所述阀腔的第二端设有第二连通口，且所述第二连通口与所述第二出入口连通；所述阀腔内靠近所述第一连通口处具有密封面，所述第二连通口的中心与所述阀腔的中心轴线错位设置；
所述第一出入口与所述第二出入口之间的压力差能够使得所述阀芯在第一位置和第二位置之间切换；当所述第一出入口的压力大于所述第二出入口的压力时，所述阀芯移动至所述第二位置，所述第一出入口依次通过所述第一连通口、所述阀腔及所述第二连通口与所述第二出入口导通，流体通道开启；当所述第一出入口的压力小于所述第二出入口的压力时，所述阀芯移动至所述第一位置，所述阀芯与所述密封面配合密封，所述阀腔与所述第一出入口断开连通，流体通道关闭。
进一步地，所述第一连通口与所述阀腔同心地开设于所述第一端上，所述阀芯呈球状、纺锤状或锥台状。
进一步地，所述阀腔中距离所述第二连通口更近的侧壁为抵靠侧，所述抵靠侧距离所述第二连通口的中心的距离为抵靠距离，所述抵靠距离小于所述阀芯的半径；所述抵靠侧距离所述第一连通口的中心的距离为防抵触距离，所述防抵触距离大于所述阀芯的半径。
进一步地，所述流体通道包括上流体通道和下流体通道，所述上流体通道包括第一上出入口、第二上出入口、第一上连通口、上阀腔、上阀芯和第二上连通口，所述下流体通道包括第一下出入口、第二下出入口、第一下连通口、下阀腔、下阀芯和第二下连通口；
所述第一上出入口和第一下出入口连通或第二上出入口与第二下出入口连通，所述上阀腔的密封面和下阀腔的密封面方向相反，当上流体通道开启时，下流体通道关闭。
进一步地，包括进水阀和出水阀，所述进水阀和出水阀中均具有所述上流体通道和所述下流体通道；所述进水阀的第一上出入口与第一下出入口连通，所述出水阀中的第二上出入口与第二下出入口连通；所述进水阀的第二上出入口与所述出水阀第一上出入口相连，所述进水阀的第二下出入口与所 述出水阀的第一下出入口连通。
进一步地，所述阀腔的横截面积与所述阀芯的最大横截面积之差为S1,所述流体通道的最小横截面积为S2，所述S1为S2的0.1至2倍。
进一步地，所述S1与所述S2相等。
进一步地，所述出水阀还包括用于向阀外出水的出水通道，所述第二上出入口与第二下出入口汇入所述出水通道中，所述出水通道的横截面积为所述S2。
进一步地，所述抵靠距离大于第二上连通口和第二下连通口的半径，且所述抵靠距离小于所述阀腔的半径。
进一步地，所述第二上连通口和第二下连通口的面积不小于所述阀腔横截面积与阀芯最大横截面积之差。
进一步地，所述阀腔在所述阀腔内沿着轴向移动的距离为所述第二上连通口和第二下连通口半径的0.1倍至2倍。
进一步地，所述密封面呈锥面，所述锥面轴向投影的夹角为β，所述夹角的取值范围为30°≤β＜180°；所述第二端面呈平面。
所述上流体通道与所述下流体通道上下对称设置。
一种稳压泵，包括泵体和所述的切换阀，
所述泵体包括具有上活塞腔和下活塞腔；
所述进水阀的第二上出入口、所述出水阀的第一上出入口与所述上活塞腔连通，所述进水阀的第二下出入口、所述出水阀的第一下出入口与所述下活塞腔连通。
一种水刀设备，包括所述的稳压泵。
本申请中的一种切换阀、稳压泵及水刀设备与现有技术相比，具有以下有益效果：
流通通道中的第一出入口和第二出入口用于进出流体，并形成压力差；阀腔通过两端的第一连通口和第二连通口分别与第一出入口和第二出入口连通，所述第一出入口与所述第二出入口之间的压力差使得所述阀芯在第一位置和第二位置之间切换，从而使得流体通道在开启和关闭状态之间切换。
当所述第一出入口的压力大于所述第二出入口的压力时，所述阀芯移动至所述第二位置，此时由于第二连通口的中心与阀腔的中心轴线错位，第二连通口位于阀腔的一侧，当阀芯在压力的作用下抵触于阀腔的第二端上时，不会直接顶触在第二连通口的边缘形成密封状态，所述第一出入口依次通过所述第一连通口、所述阀腔及所述第二连通口与所述第二出入口导通，流体通道开启；当所述第一出入口的压力小于所述第二出入口的压力时，所述阀芯移动至所述第一位置，所述阀芯与所述密封面配合密封，所述阀腔与所述第一出入口断开连通，流体通道关闭。
可以看出，本申请中的切换阀、稳压泵及水刀设备，利用在其上开设偏置的第二连通口来实现单向导通的效果，能够避免在阀腔的第二端设置复杂的凸起或增设弹簧等结构，制造更为简单，在使用时，对阀芯和阀腔的损伤更小，使用寿命更长。
附图说明
图1为本申请的一种切换阀中流体通道处于开启状态时的部分剖视示意图；
图2为本申请的一种切换阀中流体通道处于关闭状态时的部分剖视示意图；
图3为图1中C处的放大图；
图4为本申请的一种稳压泵的侧视图；
图5为本申请图4中A-A处第一种状态的剖视图；
图6为本申请图4中B-B处第一种状态的剖视图；
图7为本申请图4中A-A处第二种状态的剖视图；
图8为本申请图4中B-B处第二种状态的剖视图；
图9为本申请的一种稳压泵的爆炸图；
图10为本申请的一种稳压泵的立体图。
具体实施方式
下面，结合附图以及具体实施方式，对本申请做进一步描述，需要说明的是，在不相冲突的前提下，以下描述的各实施例之间或各技术特征之间可 以任意组合形成新的实施例。
在本申请的描述中，需要理解的是，术语“中心”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图5所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本申请的描述中，除非另有说明，“多个”的含义是两个或两个以上。
需要说明的是，当元件被称为“固定于”另一个元件，它可以直接在另一个元件上，或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能存在居中元件。
除非另有定义，本文所使用的所有的技术术语和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本文中在申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请。本文所使用的术语“及/或”包括一个或多个相关的所列项目的任意的和所有的组合。
一种切换阀，具有：
流体通道4，所述流体通道4的两端设有第一出入口41和第二出入口42，所述流体通道4包括阀腔44，所述阀腔44内活动设有阀芯45；
所述阀腔44的第一端设有第一连通口43，且所述第一连通口43与所述第一出入口41连通；所述阀腔44的第二端设有第二连通口46，且所述第二连通口46与所述第二出入口42连通；所述阀腔44内靠近所述第一连通口43处具有密封面441，所述第二连通口46的中心与所述阀腔44的中心轴线错位设置；
所述第一出入口41与所述第二出入口42之间的压力差能够使得所述阀芯在第一位置和第二位置之间切换；
如图1所示，当所述第一出入口41的压力大于所述第二出入口42的压力时，所述阀芯移动至所述第二位置，所述第一出入口41依次通过所述第一连通口43、所述阀腔44及所述第二连通口46与所述第二出入口42导通，流体通道4开启；
如图2所示，当所述第一出入口41的压力小于所述第二出入口42的压力时，所述阀芯移动至所述第一位置，所述阀芯与所述密封面441配合密封，所述阀腔44与所述第一出入口41断开连通，流体通道4关闭。
流通通道中的第一出入口41和第二出入口42用于进出流体，并形成压力差；阀腔44通过两端的第一连通口43和第二连通口46分别与第一出入口41和第二出入口42连通，所述第一出入口41与所述第二出入口42之间的压力差使得所述阀芯在第一位置和第二位置之间切换，从而使得流体通道4在开启和关闭状态之间切换。
当所述第一出入口41的压力大于所述第二出入口42的压力时，所述阀芯移动至所述第二位置，此时由于第二连通口46的中心与阀腔44的中心轴线错位，第二连通口46位于阀腔44的一侧，当阀芯45在压力的作用下抵触于阀腔44的第二端上时，不会直接顶触在第二连通口46的边缘形成密封状态，所述第一出入口41依次通过所述第一连通口43、所述阀腔44及所述第二连通口46与所述第二出入口42导通，流体通道4开启；当所述第一出入口41的压力小于所述第二出入口42的压力时，所述阀芯移动至所述第一位置，所述阀芯与所述密封面441配合密封，所述阀腔44与所述第一出入口41断开连通，流体通道4关闭。
作为一个优选实施方式，所述第一连通口43与所述阀腔44同心地开设于所述第一端上，所述第二连通口46与所述阀腔44偏心地开设于所述第二端上。第一连通口43上具有密封面441，设于与阀腔44同心的中心位置便于阀芯45从各个方向运动到此处时均能快速对准密封；偏心的第二连通口46与阀腔44中心轴和第二连通口46的中心轴全部错开，避免阀芯45活动到第二位置时扣封在第二连通口46上。
其中，本实施例中的阀芯45优选呈球状、纺锤状或锥台状，以便和第一 连通口43上的密封面贴合，并能较好地避免堵住第二连通口46。
如图3所示，具体的，所述阀腔44中距离所述第二连通口46
更近的侧壁为抵靠侧442，所述抵靠侧442距离所述第二连通口46的中心的距离为抵靠距离L2，所述抵靠距离L2小于所述阀芯45的半径r1。这一距离保证了当阀芯45活动至第二位置时，阀芯45由于比第二连通口46更大，下端只能抵触在阀腔44的第二端的内侧上，而不会堵塞第二连通口46，流体可以从阀芯45周围流通入第二连通口46中，进而流出阀腔44。所述抵靠侧442距离所述第一连通口43的中心的距离为防抵触距离L1，所述防抵触距离L1大于所述阀芯45的半径r1，这一距离保证了当阀芯45活动至第一位置时，可以完全与密封面441贴合，而不会因为阀腔44内壁的阻挡无法贴合。两组尺寸关系使得本实施例中的阀腔44和阀芯45能在压差的推动下实现单向导通的效果，无需借助其它结构，制造简单方便，对精度要求较低。
作为抵靠距离的进一步优选方案，所述抵靠距离L2大于第二上连通口4e6和第二下连通口4f6的半径r2，且所述抵靠距离L2小于所述阀腔44的半径r3。抵靠距离L2反映了第二上连通口4e6和第二下连通口4f6相对于阀腔44的偏置程度，偏置程度过大时，水流方向变化较大，会增大水流的阻力和湍流程度，阀芯45容易在阀腔44内发生随意撞击，扰乱流速，难以控制走向；偏置程度过小时，阀芯45容易堵住大部分的第二上连通口4e6或第二下连通口4f6，使得水流过大，压力过大。本实施例中的取值可以使得水流的流向更加可控，水流方向更加平稳，使得阀芯45在阀腔44内的活动更加可控；同时阀芯45也不会对第二上连通口4e6或第二下连通口4f6造成阻塞，能够保证阀腔44与第二上连通口4e6或第二下连通口4f6之间水流的正常流动。
如图4至8所示，作为本实施例的一个优选方案，所述流体通道4包括上流体通道4e和下流体通道4f，所述上流体通道4e包括第一上出入口4e1、第二上出入口4e2、第一上连通口4e3、上阀腔4e4、上阀芯4e5和第二上连通口4e6，所述下流体通道4f包括第一下出入口4f1、第二下出入口4f2、第一下连通口4f3、下阀腔4f4、下阀芯4f5和第二下连通口4f6；
所述第一上出入口4e1和第一下出入口4f1连通或第二上出入口4e2与第二下出入口4f2连通形成两种方案，所述上阀腔4e4的密封面441和下阀腔4f4的密封面441方向相反，当上流体通道4e开启时，下流体通道4f关闭。
当所述第一上出入口4e1和第一下出入口4f1连通时，第一上出入口4e1和第一下出入口4f1为单向进水的功能，第二上出入口4e2和第二下出入口4f2最多只能实现出水；当第二上出入口4e2与第二下出入口4f2连通时，第二上出入口4e2与第二下出入口4f2为单向出水的功能，第一上出入口4e1和第一下出入口4f1最多只能实现进水。优选地，为保证流向上流体通道4e和下流体通道4f的水流大小一致，上流体通道4e和下流体通道4f上下对称。
作为本实施例的一个优选方案，包括进水阀2和出水阀3，所述进水阀2和出水阀3中均具有所述上流体通道4e和所述下流体通道4f；所述进水阀2的第一上出入口4e1与第一下出入口4f1连通，所述出水阀3中的第二上出入口4e2与第二下出入口4f2连通；所述进水阀2的第二上出入口4e2与所述出水阀3第一上出入口4e1相连，所述进水阀2的第二下出入口4f2与所述出水阀3的第一下出入口4f1连通。
上述结构的切换阀中，由于压差的变化，存在两种水路如下：
第一种水路为：
如图5所示，在进水阀2中，水流从第一上出入口4e1和/或第一下出入口4f1进水，依次经过第一上连通口4e3、上阀腔4e4、第二上连通口4e6和第二上出入口4e2；
如图6所示，在出水阀3中，由于进水阀2的第二出入口42与出水阀3的第一上出入口4e1连通，因此从进水阀2第二上出入口4e2流出的水流继续流向出水阀3的第一上出入口4e1，再依次经过第一上连通口4e3、上阀腔4e4、第二上连通口4e6，最后从第二上出入口4e2和/或第二下出入口4f2流出。
第二种水路为：
如图7所示，在进水阀2中，水流从第一上出入口4e1和/或第一下出入 口4f1进水，依次经过第一下连通口4f3、下阀腔4f4、第二下连通口4f6和第二下出入口4f2；
如图8所示，在出水阀3中，由于进水阀2的第二出入口42与出水阀3的第一下出入口4f1连通，因此从进水阀2第二下出入口4f2流出的水流继续流向出水阀3的第一下出入口4f1，再依次经过第一下连通口4f3、下阀腔4f4、第二下连通口4f6，最后从第二上出入口4e2和/或第二下出入口4f2流出。
作为本实施例的一个优选方案，所述阀腔44的横截面积与所述阀芯45的最大横截面积之差为S1,所述流体通道4的最小横截面积为S2，所述S1为S2的0.1至10倍，更加优选为0.1至2倍，最好所述S1与所述S2相等，以避免流体流至最小横截面积时压力变化过大。S1是保证水流通断的关键参数，若S1太大，将使得压差不足，不足以推动阀芯45活动；若S1太小，此处将变成整个切换阀中压力差最大的位置，不利于进水阀2和出水阀3的开关。本实施例中特选用整个流体通道4中的最小横截面积来作为S1的关联因素，使得S1至少能满足最小流道面积的正常流动，保证了整个稳压泵系统的正常运行。其中，所述流体通道4的最小横截面积的取值范围为0.01mm 2至100mm 2之间，优选为1mm 2至10mm 2，根据切换阀的整体体积来确定，尤其当切换阀用于水刀的稳压泵中时，这一范围的最小流道面积能满足水刀对水流的要求。
为了进一步增大出水压力，所述出水阀3还包括用于向阀外出水的出水通道，所述第二上出入口4e2与第二下出入口4f2汇入所述出水通道中，所述出水通道的横截面积为所述S2。出水通道将第二上出入口4e2与第二下出入口4f2的水流集中起来，水流分别从第二上出入口4e2与第二下出入口4f2流出，再一同流入出水通道中，最后流出阀，由于出水通道横截面积最小，可以增大出水流速和压强。
作为本实施例的一个优选方案，所述第二上连通口4e6和第二下连通口4f6的面积不小于所述阀腔44横截面积与阀芯45最大横截面积之差。使得水流在阀腔44中的流动面积不会小于从第二上连通口4e6和第二下连通口 4f6流出之后的流动面积，水流的流量得以保证，出阀腔44时压力不会增大而阻碍流体流出阀腔44。
作为本实施例的一个优选方案，所述阀腔44在所述阀腔44内沿着轴向移动的距离为所述第二上连通口4e6和第二下连通口4f6半径的0.1倍至10倍，优选为0.1至2倍。水刀是使用在对于时效性要求很高的临床手术中，因此开启水刀设备时，射出的水流需要迅速达到所需的水量和流速；关闭水刀时，能迅速停止输送水流，对于稳压泵的工作效率和响应速度提出了很高的要求。在本实施例中，由于阀芯45是通过沿着轴向活动来堵住第二上连通口4e6和第二下连通口4f6的，因此阀芯45在轴向上活动的距离越大，其所需的时间就越长，响应时间越长，不利于快速响应操作。
作为本实施例的一个优选方案，所述密封面441呈锥面，所述锥面轴向投影的夹角为β，所述夹角的取值范围为30°≤β＜180°；所述第二端面呈平面。
本实施例还提供一种稳压泵，包括泵体1和所述的切换阀，
所述泵体1包括具有上活塞腔11和下活塞腔12，所述上活塞腔11和下活塞腔12中设有活塞(图中未示出)；
所述进水阀2的第二上出入口4e2、所述出水阀3的第一上出入口4e1与所述上活塞腔11连通，所述进水阀2的第二下出入口4f2、所述出水阀3的第一下出入口4f1与所述下活塞腔12连通。
当上活塞腔11中的压力小于下活塞腔12中的压力时，在进水阀2中，水流从第一上出入口4e1和/或第一下出入口4f1进水，依次经过第一上连通口4e3、上阀腔4e4、第二上连通口4e6和第二上出入口4e2；在出水阀3中，由于进水阀2的第二出入口42与出水阀3的第一上出入口4e1连通，因此从进水阀2第二上出入口4e2流出的水流继续流向出水阀3的第一上出入口4e1，再依次经过第一上连通口4e3、上阀腔4e4、第二上连通口4e6，最后从第二上出入口4e2和/或第二下出入口4f2流出。
当上活塞腔11中压力大于下活塞腔12中的压力时，在进水阀2中，水流从第一上出入口4e1和/或第一下出入口4f1进水，依次经过第一下连通口 4f3、下阀腔4f4、第二下连通口4f6和第二下出入口4f2；在出水阀3中，由于进水阀2的第二出入口42与出水阀3的第一下出入口4f1连通，因此从进水阀2第二下出入口4f2流出的水流继续流向出水阀3的第一下出入口4f1，再依次经过第一下连通口4f3、下阀腔4f4、第二下连通口4f6，最后从第二上出入口4e2和/或第二下出入口4f2流出。
作为所述稳压泵具体结构一种优选方案，所述泵体1上还设有两处上接口13和两处下接口14，进水阀2和出水阀3各自包括一组内部具有通道其相互连通的第一接头51、第二接头52和第三接头53；两处上接口13分别与进水阀2和出水阀3上的第一接头51插接，以连通上活塞腔11；两处所述下接口14分别与进水阀2和出水阀3上的第二接头52插接，以连通下活塞腔12；所述进水阀2中的第三接头53用于从阀外进水，所述出水阀3中的第三接头53用于向阀外出水。
一种水刀设备，包括所述的稳压泵。这种水刀可以更加适应高压液体的输送，密封性更好，当用于临床手术中时，能获得更好的使用体验。
上述实施方式仅为本申请的优选实施方式，不能以此来限定本申请保护的范围，本领域的技术人员在本申请的基础上所做的任何非实质性的变化及替换均属于本申请所要求保护的范围。

Claims (14)

  1. 一种切换阀，其特征在于，具有：
    流体通道，所述流体通道的两端设有第一出入口和第二出入口，所述流体通道包括阀腔，所述阀腔内活动设有阀芯；
    所述阀腔的第一端设有第一连通口，且所述第一连通口与所述第一出入口连通；所述阀腔的第二端设有第二连通口，且所述第二连通口与所述第二出入口连通；所述阀腔内靠近所述第一连通口处具有密封面，所述第二连通口的中心与所述阀腔的中心轴线错位设置；
    所述第一出入口与所述第二出入口之间的压力差能够使得所述阀芯在第一位置和第二位置之间切换；当所述第一出入口的压力大于所述第二出入口的压力时，所述阀芯移动至所述第二位置，所述第一出入口依次通过所述第一连通口、所述阀腔及所述第二连通口与所述第二出入口导通，流体通道开启；当所述第一出入口的压力小于所述第二出入口的压力时，所述阀芯移动至所述第一位置，所述阀芯与所述密封面配合密封，所述阀腔与所述第一出入口断开连通，流体通道关闭。
  2. 如权利要求1所述的切换阀，其特征在于，所述第一连通口与所述阀腔同心地开设于所述第一端上，所述阀芯呈球状、纺锤状或锥台状。
  3. 如权利要求2所述的切换阀，其特征在于，所述阀腔中距离所述第二连通口更近的侧壁为抵靠侧，所述抵靠侧距离所述第二连通口的中心的距离为抵靠距离，所述抵靠距离小于所述阀芯的半径；所述抵靠侧距离所述第一连通口的中心的距离为防抵触距离，所述防抵触距离大于所述阀芯的半径。
  4. 如权利要求1至3任一项所述的切换阀，其特征在于，所述流体通道包括上流体通道和下流体通道，所述上流体通道包括第一上出入口、第二上出入口、第一上连通口、上阀腔、上阀芯和第二上连通口，所述下流体通道包括第一下出入口、第二下出入口、第一下连通口、下阀腔、下阀芯和第二下连通口；
    所述第一上出入口和第一下出入口连通或第二上出入口与第二下出入口 连通，所述上阀腔的密封面和下阀腔的密封面方向相反，当上流体通道开启时，下流体通道关闭。
  5. 如权利要求4所述的切换阀，其特征在于，包括进水阀和出水阀，所述进水阀和出水阀中均具有所述上流体通道和所述下流体通道；所述进水阀的第一上出入口与第一下出入口连通，所述出水阀中的第二上出入口与第二下出入口连通；所述进水阀的第二上出入口与所述出水阀第一上出入口相连，所述进水阀的第二下出入口与所述出水阀的第一下出入口连通。
  6. 如权利要求5所述的切换阀，其特征在于，所述阀腔的横截面积与所述阀芯的最大横截面积之差为S1,所述流体通道的最小横截面积为S2，所述S1为S2的0.1至10倍。
  7. 如权利要求6所述的切换阀，其特征在于，所述S1与所述S2相等。
  8. 如权利要求6所述的切换阀，其特征在于，所述出水阀还包括用于向阀外出水的出水通道，所述第二上出入口与第二下出入口汇入所述出水通道中，所述出水通道的横截面积为所述S2。
  9. 如权利要求5所述的切换阀，其特征在于，所述抵靠距离大于第二上连通口和第二下连通口的半径，且所述抵靠距离小于所述阀腔的半径。
  10. 如权利要求5所述的切换阀，其特征在于，所述第二上连通口和第二下连通口的面积不小于所述阀腔横截面积与阀芯最大横截面积之差。
  11. 如权利要求5所述的切换阀，其特征在于，所述阀腔在所述阀腔内沿着轴向移动的距离为所述第二上连通口和第二下连通口半径的0.1倍至10倍。
  12. 如权利要求1所述的切换阀，其特征在于，在所述密封面呈锥面，所述锥面轴向投影的夹角为β，所述夹角的取值范围为30°≤β＜180°；所述第二端面呈平面。
  13. 一种稳压泵，其特征在于，包括泵体和权利要求5至12任一项所述的切换阀，
    所述泵体包括具有上活塞腔和下活塞腔；
    所述进水阀的第二上出入口、所述出水阀的第一上出入口与所述上活塞 腔连通，所述进水阀的第二下出入口、所述出水阀的第一下出入口与所述下活塞腔连通。
  14. 一种水刀设备，其特征在于，包括权利要求13所述的稳压泵。
PCT/CN2021/129250 2021-08-31 2021-11-08 一种切换阀、稳压泵及水刀设备 WO2023029208A1 (zh)

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CN216112350U (zh) * 2021-08-31 2022-03-22 惠州海卓科赛医疗有限公司 一种切换阀、稳压泵及水刀设备

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002013651A (ja) * 2000-06-28 2002-01-18 Tsutsunaka Sheet Bosui Kk 散気装置用逆流防止弁
CN104265619A (zh) * 2014-09-30 2015-01-07 罗凤玲 一种医用高压泵
CN106917887A (zh) * 2015-12-25 2017-07-04 罗凤玲 单向阀
CN211315242U (zh) * 2019-12-19 2020-08-21 苏州华亘阀门有限公司 阀座一体导向式球型止回阀
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