WO2022257648A1 - 一种泵头和柱塞泵 - Google Patents

一种泵头和柱塞泵 Download PDF

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Publication number
WO2022257648A1
WO2022257648A1 PCT/CN2022/090768 CN2022090768W WO2022257648A1 WO 2022257648 A1 WO2022257648 A1 WO 2022257648A1 CN 2022090768 W CN2022090768 W CN 2022090768W WO 2022257648 A1 WO2022257648 A1 WO 2022257648A1
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WIPO (PCT)
Prior art keywords
channel
liquid
liquid outlet
liquid inlet
reversing valve
Prior art date
Application number
PCT/CN2022/090768
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English (en)
French (fr)
Inventor
潘芹
金鸿雁
程宁
冷德嵘
徐延峰
刘辉
刘春俊
Original Assignee
南微医学科技股份有限公司
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Application filed by 南微医学科技股份有限公司 filed Critical 南微医学科技股份有限公司
Publication of WO2022257648A1 publication Critical patent/WO2022257648A1/zh

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    • 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
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • 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

Definitions

  • the present application relates to the technical field of medical devices, in particular to a pump head and a plunger pump.
  • the plunger pump can output high-pressure and low-flow liquid, it has been used in medical endoscopes to cooperate with instruments including injection needles or electrocutotomy for submucosal uplift. During clinical use, doctors will It is necessary to start and stop the plunger pump system at any time to complete the control of mucosal swelling.
  • the currently adopted scheme is: set a shut-off valve between the liquid outlet and the electric knife inlet, and the shut-off valve is in a conduction state when the pump is started; 1. When the system stops, the shut-off valve rotates an angle to realize the shut-off of the liquid. At this time, there is shut-off During the short-term process, higher requirements are put forward for the internal sealing of the pressure pump system; 2. During the process of replacing the pump or resetting the system, there is still liquid output from the remote outlet, which seriously affects the doctor's experience.
  • the purpose of this application is to provide a pump head and a plunger pump, which can realize the conduction of the liquid inlet and outlet channels of the pump body, and realize the circulation of the liquid inside the pump body.
  • the present application provides a pump head, including a pump body and a flow guide;
  • the pump body has a piston chamber, a liquid inlet channel and a liquid outlet channel; both the liquid inlet channel and the liquid outlet channel are connected with the piston chamber;
  • the deflector is movably connected with the pump body, and the deflector is used to connect the liquid inlet channel with the liquid outlet channel.
  • the pump body has a diversion channel; the diversion channel communicates with the liquid inlet channel and the liquid outlet channel.
  • the deflector is movably arranged in the deflector channel.
  • the pump body has a liquid inlet and a liquid outlet; the liquid inlet is connected to the liquid inlet channel, and the liquid outlet is connected to the liquid outlet channel; the liquid inlet, the diversion channel and the liquid outlet are connected in sequence , and the guide member can slide in the channel formed by the liquid inlet, the guide channel and the liquid outlet.
  • the liquid inlet channel and the liquid outlet channel can be in a conduction mode;
  • the outlet channel is in blocking mode.
  • the deflector is a slider.
  • the slider includes a first subsection and a second subsection connected to the first subsection, and the second subsection is provided with a first diversion hole and a second diversion hole communicated with the first diversion hole. diversion hole; when the first subsection is located at the liquid inlet, the liquid inlet channel and the liquid outlet channel are in the conduction mode; when the first subsection is located in the diversion channel, the liquid inlet channel and the liquid outlet channel are in the blocking mode; when The first subsection is located at the liquid outlet, and when the first diversion hole communicates with the liquid outlet channel, the liquid inlet channel and the liquid outlet channel are in a conduction mode.
  • the deflector includes a first sliding member slidably arranged in the liquid inlet channel;
  • the first sliding member is provided with a first hole, a second hole and a third hole; the first hole communicates with the liquid inlet channel; the second hole and the third hole are respectively arranged at opposite intervals along the axis of the liquid inlet channel, and are both connected to the first hole. A channel connected;
  • the liquid inlet channel and the liquid outlet channel are in the conduction mode; when the second hole of the first slider is connected with the liquid inlet, the liquid inlet channel and the liquid outlet Channel is in blocking mode.
  • a first slideway for sliding the first sliding member is provided on the inner peripheral surface of the liquid inlet channel.
  • the flow guiding element further includes a second sliding element slidably arranged in the liquid outlet channel;
  • the second sliding member is provided with a fourth hole, a fifth hole and a sixth hole; the fourth hole communicates with the liquid outlet channel; the fifth hole and the sixth hole are respectively arranged at opposite intervals along the axis of the liquid outlet channel, and are all connected to the first hole.
  • the liquid inlet channel and the liquid outlet channel are in the conduction mode; when the sixth hole of the second slider corresponds to the liquid outlet, the liquid inlet channel and the liquid outlet Channel is in blocking mode.
  • a second slideway for the second sliding member to slide is provided on the inner peripheral surface of the liquid outlet channel.
  • the pump body has an active channel, the active channel communicates with the guide channel, and the guide member is slidably arranged in the active channel.
  • the liquid inlet channel and the liquid outlet channel are in the conducting mode; when the guide is located in the guide channel, the liquid inlet channel and the liquid outlet channel are in the blocking mode .
  • the deflector includes a reversing valve movably connected with the pump body;
  • the reversing valve has a first position for making the liquid inlet channel and the liquid outlet channel in a conducting mode; and a second position for making the liquid inlet channel and the liquid outlet channel in a blocking mode.
  • the diversion channel communicates with the liquid inlet channel; when the reversing valve is in the first position, the reversing valve connects the liquid outlet channel with the diversion channel; when the reversing valve is in the second position, The reversing valve blocks the diversion channel and the liquid outlet channel;
  • the diversion channel communicates with the liquid outlet channel; when the reversing valve is in the first position, the reversing valve connects the liquid inlet channel with the diversion channel; when the reversing valve is in the second position, the reversing valve guides the flow The channel and the inlet channel are blocked.
  • the reversing valve includes a first flow channel, a second flow channel and a third flow channel that communicate with each other;
  • Both the first flow channel and the second flow channel are in communication with the liquid inlet channel; when the reversing valve is in the first position, the third flow channel is in communication with the diversion channel; when the reversing valve is in the second position, the third flow channel communicated with the liquid inlet;
  • both the first flow path and the second flow path are in communication with the outlet channel; when the reversing valve is in the first position, the third flow path is in communication with the diversion channel; when the reversing valve is in the second position, the third flow path The channel communicates with the liquid outlet.
  • the reversing valve includes a fourth flow channel passing through the valve body of the reversing valve;
  • the fourth flow channel When the reversing valve is in the first position, the fourth flow channel communicates with the liquid inlet channel and the liquid outlet channel; when the reversing valve is in the second position, the fourth flow channel communicates with at least one of the liquid inlet channel or the liquid outlet channel block.
  • the present application provides a plunger pump, the plunger pump includes a piston, a piston rod, a drive mechanism and the above-mentioned pump head;
  • the piston is slidably arranged in the piston chamber, and the piston is connected with the piston rod;
  • the driving mechanism is connected with the piston rod, and is used to drive the piston to reciprocate relative to the piston chamber, so that the liquid in the liquid inlet channel is transported to the piston chamber, and the piston
  • the pressurized liquid in the cavity is delivered to the liquid outlet channel.
  • the pump head includes a pump body and a flow guide; the pump body has a piston cavity, a liquid inlet channel and a liquid outlet channel; both the liquid inlet channel and the liquid outlet channel are connected with the piston cavity; Used to connect the liquid inlet channel with the liquid outlet channel.
  • the flow guide can connect the liquid discharge channel with the liquid intake channel, and guide the liquid in the liquid discharge channel to flow to the liquid intake channel, so that the liquid flows in the piston cavity, the liquid intake channel and the liquid discharge channel. Medium circulation, so that the pump head stops outputting liquid.
  • Fig. 1 is the structural representation of pump head in the embodiment of the present application.
  • Fig. 2 is the sectional view of pump head in the embodiment of the present application.
  • Fig. 3 is a schematic structural view of the deflector in the embodiment of the present application when it is located at the liquid inlet;
  • Fig. 4 is a schematic structural view of the guide member in the embodiment of the present application when it is located in the guide channel;
  • Fig. 5 is a schematic structural view of the flow guide in the embodiment of the present application when it is located at the liquid outlet;
  • Fig. 6 is a schematic structural view of the slider at the liquid inlet in other embodiments of the present application.
  • Fig. 7 is a schematic structural diagram of a slider in other embodiments of the present application.
  • Fig. 8 is a schematic structural view of the slider in other embodiments of the present application when it is located in the diversion channel;
  • Fig. 9 is a schematic structural view of the slider at the liquid outlet in other embodiments of the present application.
  • Fig. 10 is a schematic structural view of the first sliding member connecting the liquid inlet channel and the liquid outlet channel in other embodiments of the present application;
  • Fig. 11 is a schematic structural view of the first slider in other embodiments of the present application.
  • Fig. 12 is a schematic structural view of the first sliding member blocking the liquid inlet channel and the liquid outlet channel in other embodiments of the present application;
  • Fig. 13 is a schematic structural view of the second sliding member connecting the liquid inlet channel and the liquid outlet channel in other embodiments of the present application;
  • Fig. 14 is a schematic structural diagram of a second slider in other embodiments of the present application.
  • Fig. 15 is a schematic structural view of the second sliding member blocking the liquid inlet channel and the liquid outlet channel in other embodiments of the present application;
  • Fig. 16 is a schematic structural view of the guide member connecting the liquid inlet channel and the liquid outlet channel in other embodiments of the present application;
  • Fig. 17 is a schematic diagram of the structure when the guide member blocks the liquid inlet channel and the liquid outlet channel in other embodiments of the present application;
  • Fig. 18 is a schematic structural view of the guide member connecting the liquid inlet channel and the liquid outlet channel in other embodiments of the present application;
  • Fig. 19 is a schematic structural view of the guide member blocking the liquid inlet channel and the liquid outlet channel in other embodiments of the present application;
  • Fig. 20 is a schematic structural view of the guide member connecting the liquid inlet channel and the liquid outlet channel in other embodiments of the present application;
  • Fig. 21 is a schematic diagram of the structure when the guide member blocks the liquid inlet channel and the liquid outlet channel in other embodiments of the present application;
  • Fig. 22 is a schematic structural view of the reversing valve in the first position in other embodiments of the present application.
  • Fig. 23 is a schematic structural view of the reversing valve in the second position in other embodiments of the present application.
  • Fig. 24 is a schematic structural view of the reversing valve in the first position in other embodiments of the present application.
  • Fig. 25 is a schematic structural view of the reversing valve in the second position in other embodiments of the present application.
  • Fig. 26 is a schematic structural view of the reversing valve in the first position in other embodiments of the present application.
  • Fig. 27 is a schematic structural view of the reversing valve in the second position in other embodiments of the present application.
  • Fig. 28 is a schematic structural view of the reversing valve in the first position in other embodiments of the present application.
  • Fig. 29 is a schematic structural view of the reversing valve in the second position in other embodiments of the present application.
  • Icon 200-pump head; 210-pump body; 211-piston cavity; 212-inlet channel; 213-outlet channel; 214-guiding channel; 215-inlet port; 221-slider; 222-first division; 223-second division; 224-first diversion hole; 225-second diversion hole; 226-first sliding member; 227-first channel 228-the second channel; 229-the third channel; 231-the first slide; 232-the second slide; Road; 217-active channel; 237-reversing valve; 238-first flow channel; 239-second flow channel; 241-third flow channel; 242-fourth flow channel; 111-piston rod.
  • horizontal does not imply that a component is absolutely level or overhanging, but may be slightly inclined.
  • horizontal only means that its direction is more horizontal than “vertical”, and it does not mean that the structure must be completely horizontal, but can be slightly inclined.
  • the terms “installation”, “installation”, “connection”, and “connection” should be understood in a broad sense, for example, it can be a fixed connection, It can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components.
  • installation can be a fixed connection, It can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components.
  • Figure 1 shows the structure of the pump head in the embodiment of the application
  • Figure 2 shows the structure of the guide channel in the embodiment of the application
  • Figure 3- Figure 5 shows the implementation of the application The structure of the deflector in the example
  • This embodiment provides a plunger pump, the plunger pump includes a piston, a piston rod 111, a driving mechanism and a pump head 200;
  • the pump head 200 includes a pump body 210 and a flow guide 220; the pump body 210 has a piston cavity 211, a liquid inlet channel 212, and a liquid outlet channel 213; both the liquid inlet channel 212 and the liquid outlet channel 213 communicate with the piston cavity 211;
  • the flow member 220 is movably connected with the pump body 210 , and the flow guide member 220 is used to communicate the liquid inlet channel 212 with the liquid outlet channel 213 .
  • the flow guide 220 is used to connect the liquid inlet channel 212 with the liquid outlet channel 213 when the liquid discharge is stopped (the plunger pump is in the state of stopping the liquid discharge) (as shown in FIG. 3 ); the flow guide 220 also It is used to block the liquid outlet channel 213 and the liquid inlet channel 212 when the liquid is out (the plunger pump is in the liquid out state) (as shown in FIG. 4 ).
  • the piston is slidably disposed in the piston chamber 211 , and the piston is connected to the piston rod 111 ; the driving mechanism is in transmission connection with the piston rod 111 and is used to drive the piston to reciprocate relative to the piston chamber 211 .
  • the piston chamber 211 is divided into a first chamber and a second chamber, and the liquid inlet channel 212 and the liquid outlet channel 213 are connected with the first chamber and the second chamber.
  • the chambers are connected; and along with the movement of the piston, the first chamber and the second chamber switch between the liquid-inlet state and the liquid-out state;
  • the liquid inlet channel 212 When the second chamber is connected to the liquid outlet channel 213 and is in the liquid discharge state, the liquid inlet channel 212 is in a negative pressure state, and the liquid outlet channel 213 is in a positive pressure state; similarly, when the second chamber The chamber is connected to the liquid inlet channel 212 and is in the liquid inlet state, and when the first chamber is connected to the liquid outlet channel 213 and is in the liquid discharge state, the liquid inlet channel 212 is in a negative pressure state, and the liquid outlet channel 213 is in a positive pressure state;
  • the pressure in the liquid outlet channel 213 is higher than the pressure in the liquid inlet channel 212, and then when the liquid inlet channel 212 and the liquid outlet channel 213 are connected, because the liquid inlet channel 212 and the liquid outlet channel 213 There is a pressure difference between them, so the liquid in the liquid outlet channel 213 will flow to the liquid inlet channel 212 under the action of pressure.
  • Both the inlet channel 212 and the outlet channel 213 of the plunger pump communicate with the piston chamber 211, and the piston rod 111 reciprocates relative to the piston chamber 211 under the driving action of the driving mechanism, so that during the movement of the piston, the inlet liquid The liquid in the channel 212 is sucked into the piston cavity 211, and the liquid in the piston cavity 211 is discharged into the liquid outlet channel 213;
  • the deflector 220 is connected to the pump body 210 , and the deflector 220 is used to conduct or block the liquid inlet channel 212 and the liquid outlet channel 213 .
  • the flow guide 220 can connect the liquid outlet channel 213 with the liquid inlet channel 212 when it is necessary to stop the liquid outlet, so as to guide the liquid in the liquid outlet channel 213 to flow to the liquid inlet channel 212, thereby enabling the liquid to flow in the liquid inlet channel 212
  • the liquid inlet channel 212 , the piston cavity 211 and the liquid outlet channel 213 are circulated, so as to prevent the liquid from coming out of the liquid outlet 216 .
  • the pump body 210 has the flow guide channel 214; The flow guide channel 214 and the liquid inlet channel 212 and the liquid outlet channel 213 connected.
  • the pump body 210 has a liquid inlet 215 and a liquid outlet 216; the liquid inlet 215 communicates with the liquid inlet channel 212, and the liquid outlet 216 communicates with the liquid outlet channel 213; the liquid inlet 215, the diversion channel 214 and the outlet
  • the liquid ports 216 are connected sequentially, and the flow guide 220 can slide in the channel formed by the liquid inlet 215 , the flow guide channel 214 and the liquid outlet 216 .
  • the position of the flow guide 220 in the flow guide channel 214 can be adjusted so that the liquid inlet 215
  • the conduction path between the liquid inlet channel 212 is blocked by the flow guide 220, the conduction path between the liquid outlet channel 213 and the liquid outlet 216 is blocked by the flow guide 220, or the liquid inlet channel 212 and the liquid outlet channel 213
  • the conduction path of the pump is blocked by the flow guide 220; and since the plunger pump has a liquid outlet state and a cut-off state, in order to avoid a high pressure in the liquid outlet channel 213 after the pump head 200 stops flowing, the adopted It is a way to connect the liquid inlet channel 212 with the liquid outlet channel 213 .
  • the liquid inlet channel 212 and the liquid outlet channel 213 can be in a conducting mode; when the flow guide 220 is located at the flow guide channel 214, the liquid inlet channel 212 and the The outlet channel 213 is in blocking mode. That is, the conduction state of the liquid inlet channel 212 and the liquid outlet channel 213 can be adjusted by adjusting the position of the guide member 220 in the guide channel 214;
  • the flow guide 220 when the flow guide 220 is located at the liquid inlet 215 (as shown in FIG. 3 and FIG. 6 ), the conduction path between the liquid inlet channel 212 and the liquid inlet 215 is blocked by the flow guide 220. At this time, Since the guide channel 214 communicates with the liquid inlet channel 212 , the liquid outlet channel 213 , the liquid inlet 215 and the liquid outlet 216 , the guide member 220 moving in the guide channel 214 connects the liquid inlet channel 212 to the liquid inlet 215 .
  • the guide channel 214 between them is partially blocked, so at this time, the guide channel 214 communicates with the liquid inlet channel 212, the liquid outlet channel 213 and the liquid outlet 216, thus, the liquid in the liquid outlet channel 213 can pass through the guide channel 214 enters into the liquid inlet channel 212 , so that the liquid can circulate in the liquid outlet channel 213 , the liquid inlet channel 212 and the piston chamber 211 , thereby avoiding a high pressure in the liquid outlet channel 213 all the time.
  • the flow guide 220 When the flow guide 220 is located at the liquid outlet 216 (as shown in FIGS. 5 and 8 ), the conduction path between the liquid outlet channel 213 and the liquid outlet 216 is blocked by the flow guide 220. At this time, due to the flow guide The channel 214 communicates with the liquid inlet channel 212, the liquid outlet channel 213, the liquid inlet port 215, and the liquid outlet port 216, and the guide member 220 moving in the guide channel 214 guides the channel between the liquid outlet channel 213 and the liquid outlet port 216. The flow channel 214 is partially blocked, so the flow guide channel 214 communicates with the liquid inlet channel 212, the liquid outlet channel 213 and the liquid inlet port 215 at this time.
  • the liquid in the liquid outlet channel 213 can enter the liquid inlet channel 212 through the guide channel 214, so that the liquid can circulate in the liquid outlet channel 213, the liquid inlet channel 212 and the piston chamber 211, thereby avoiding the liquid outlet channel 213 There is always a high pressure inside.
  • the flow guide 220 is movably arranged in the flow guide channel 214, and in order to drive the flow guide 220 to slide in the flow guide channel 214, the pump
  • the head 200 can also include a driving part, and the driving part can use mechanisms such as a motor connected to a rack and pinion mechanism, a motor connected to a connecting rod mechanism, a solenoid valve connected to a piston rod 111 mechanism, a cylinder connected to a piston rod 111 mechanism, or a hydraulic cylinder connected to a piston rod 111 mechanism.
  • the transformation of the position of the flow guiding member 220 is realized, and the purpose of fluid guiding control is finally achieved.
  • the flow guide 220 can connect the liquid outlet channel 213 with the liquid outlet 216 when the liquid outlet 216 is discharging liquid, thereby guiding the liquid in the liquid outlet channel 213 to the liquid outlet 216. and when the liquid is stopped, the liquid outlet channel 213 can be connected with the liquid inlet channel 212, thereby guiding the liquid in the liquid outlet channel 213 to flow to the liquid inlet channel 212, and then the liquid can be made to flow in the liquid inlet channel 212, the piston The cavity 211 and the liquid outlet channel 213 are circulated, so as to avoid the liquid out of the liquid outlet 216 .
  • the flow guide 220 when setting the flow guide 220, can be a slider 221 slidably arranged in the flow guide channel 214, and under the action of the driving part The liquid inlet 215, the liquid outlet 216 and the guide channel 214 slide, thus, the slider 221 can be driven to slide in the liquid inlet 215, the liquid outlet 216 and the guide channel 214 through the driving part, thereby changing the position of the slider 221. position to adjust the conduction state of the liquid inlet channel 212 and the liquid outlet channel 213;
  • the slider 221 when the slider 221 is slidably accommodated in the guide channel 214, the slider 221 includes a first subsection 222 and a second subsection 223 connected to the first subsection 222, and the second subsection 223 is connected to the first subsection 222.
  • the second subsection 223 is provided with a first diversion hole 224 and a second diversion hole 225 communicating with the first diversion hole 224; wherein, the first subsection 222 is used to block the liquid inlet 215, the liquid outlet 216 or The guide channel 214, the second guide hole 225 communicates with the guide channel 214; and the slider 221 has the function of the first subsection 222 to block the liquid inlet 215, the liquid outlet 216 or the guide channel 214 under the action of an external force.
  • the liquid inlet 215 and the liquid inlet channel 212 are blocked, and the liquid inlet channel 212 and the liquid outlet channel 213 are in a conduction mode;
  • the liquid outlet 216 When the first subsection 222 is located at the liquid outlet 216 (as shown in Figure 8), the liquid outlet 216 is blocked with the liquid outlet channel 213, and the liquid outlet channel 213 communicates with the first diversion hole 224, and the second diversion hole 225 communicates with the first guide hole 224, the second guide hole 225 communicates with the guide channel 214, and the guide channel 214 communicates with the liquid inlet channel 212, so the liquid inlet channel 212 and the liquid outlet channel 213 are in a conduction mode;
  • the liquid inlet 215 communicates with the second guide hole 225
  • the second guide hole 225 communicates with the first guide hole 224
  • the first guide hole 225 communicates with the first guide hole 224.
  • the guide hole 224 communicates with the liquid inlet channel 212 , so the liquid inlet channel 212 and the liquid outlet channel 213 are in blocking mode, and the liquid inlet port 215 communicates with the liquid inlet channel 212 .
  • Figure 10- Figure 10- Figure 12 shows the structure of the first slider in other embodiments of the application
  • Figure 13- Figure 15 shows the structure of the second slider in other embodiments of the application
  • the slider 221 when the slider 221 is set, the slider 221 can also be slidably accommodated in the liquid inlet channel 212 or the liquid outlet channel 213, and the slider 221 is relatively opposite to the inlet channel 213 under the action of the driving part.
  • the liquid channel 212 or the liquid outlet channel 213 slides, so that the slider 221 can be driven to slide in the liquid outlet channel 213 by the driving part, thereby changing the position of the slider 221 .
  • the flow guide 220 may include a first slide 226 slidably arranged in the liquid inlet channel 212; the first slide 226 is provided with a second A hole 227, a second hole 228 and a third hole 229; the first hole 227 communicates with the liquid inlet channel 212; The first hole 227 is in communication; when the third hole 229 of the first sliding member 226 is connected to the flow guide channel 214, the liquid inlet channel 212 and the liquid outlet channel 213 are in the conduction mode; when the second hole 228 of the first sliding member 226 When the corresponding liquid inlet 215 is connected, the liquid inlet channel 212 and the liquid outlet channel 213 are in a blocking mode.
  • the axis of the first hole 227 coincides with the axis of the liquid inlet channel 212, the axis of the second hole 228 and the axis of the third hole 229 are perpendicular to the axis of the first hole 227;
  • the first hole 227 runs through the first slider 226 along the axial direction of the liquid inlet channel 212, the first hole 227 communicates with the liquid inlet channel 212 and the axis coincides, so the first slider 226 is relatively opposite to the liquid inlet under the action of the driving part.
  • the channel 212 slides, it can maintain a conduction state with the liquid inlet channel 212; and since the diversion channel 214 and the liquid inlet port 215 are respectively located on both sides of the liquid inlet channel 212, the second hole 228 and the third hole 229 are respectively located On both sides of the first hole 227 , the third hole 229 is used to communicate with the guide channel 214 , and the second hole 228 is used to communicate with the liquid inlet 215 .
  • the third hole 229 of the first slider 226 communicates with the flow guide channel 214
  • the third hole 229 communicates with the first hole 227
  • the flow guide channel 214 communicates with the liquid outlet channel 213
  • the first hole 227 It communicates with the liquid inlet channel 212, so the liquid inlet channel 212 and the liquid outlet channel 213 are in a conduction mode.
  • the liquid inlet channel 212 and the liquid outlet channel 213 are in blocking mode, so that the liquid inlet 215 is communicated with the liquid inlet channel 212, and the liquid outlet channel 213 is blocked with liquid inlet channel 212.
  • the inner peripheral surface of the liquid inlet channel 212 is also provided with a sliding hole for the first sliding member 226.
  • the first slideway 231 is also provided.
  • the flow guide 220 when the flow guide 220 is set, the flow guide 220 also includes a second slide 232 slidably arranged in the outlet channel 213; the second slide 232 is provided with a first Four holes 233, the fifth hole 234 and the sixth hole 235; the fourth hole 233 communicates with the liquid outlet channel 213; The fourth hole 233 is in communication; when the fifth hole 234 of the second slider 232 is in communication with the flow guide channel 214, the liquid inlet channel 212 and the liquid outlet channel 213 are in a conduction mode; when the sixth hole 235 of the second slider 232 When the corresponding liquid outlet 216 is connected, the liquid inlet channel 212 and the liquid outlet channel 213 are in blocking mode.
  • the working principle of the second sliding member 232 is the same as that of the first sliding member 226 , so it will not be repeated here.
  • the inner peripheral surface of the liquid outlet channel 213 is also provided with a sliding hole for the second sliding member 232.
  • the second slideway 236 is also provided.
  • FIG. 16-FIG. 21 show the structure of the deflector 220 in other embodiments of the present application; in other embodiments of the present application, the pump body 210 can also have a movable channel 217 , the active channel 217 communicates with the guide channel 214; the guide member 220 is slidably arranged in the active channel 217; when the guide member 220 is located in the active channel 217 (as shown in Fig. The channel 212 and the liquid outlet channel 213 are in the conduction mode; when the flow guide 220 is located in the flow guide channel 214 (as shown in Figure 17, Figure 18 and Figure 21), the liquid inlet channel 212 and the liquid outlet channel 213 are in the blocking mode .
  • the flow guide 220 is located in the active channel 217; when the liquid inlet channel 212 and the liquid outlet channel 213 are blocked, at least part of the flow guide 220 is located Channel 214.
  • the position of the flow guide 220 can be changed by driving the flow guide 220 to slide in the movable channel 217, so that the flow guide channel 214 is conducted or blocked by the flow guide 220;
  • the extending direction of the movable channel 217 may be perpendicular to the extending direction of the liquid inlet channel 212, may also be perpendicular to the extending direction of the flow guide channel 214, or extend along other directions.
  • Figure 22- Figure 29 shows the structure of the reversing valve in other embodiments of the application; further, in other embodiments of the application, when the flow guide 220 is set, the flow guide Part 220 may include a reversing valve 237 that is movably connected to the pump body 210; the reversing valve 237 has a first position that makes the liquid inlet channel 212 and the liquid outlet channel 213 in the conduction mode (as shown in Fig. 22, Fig. 25, Fig. 26 and 28); and make the liquid inlet channel 212 and the liquid outlet channel 213 in the second position of blocking mode (as shown in Figure 23, Figure 24, Figure 27 and Figure 29).
  • a reversing valve 237 that is movably connected to the pump body 210; the reversing valve 237 has a first position that makes the liquid inlet channel 212 and the liquid outlet channel 213 in the conduction mode (as shown in Fig. 22, Fig. 25, Fig. 26 and 28); and make the liquid inlet channel 212 and the liquid
  • the reversing valve 237 when the reversing valve 237 is in the first position, the reversing valve 237 connects the liquid outlet channel 213 with the liquid inlet channel 212; when the reversing valve 237 is in the second position, the reversing valve 237 connects the liquid outlet channel 213 is blocked with liquid inlet channel 212.
  • the reversing valve 237 can include the first flow channel 238, the second flow channel 239 and the third flow channel 241 which communicate with each other; the first flow channel 238 and the second flow channel
  • the flow channels 239 are all in communication with the liquid inlet channel 212; when the reversing valve 237 is in the first position (as shown in Figure 22 and Figure 25), the third flow channel 241 is in communication with the guide channel 214; when the reversing valve 237 When in the second position (as shown in Figure 23 and Figure 24), the third flow channel 241 communicates with the liquid inlet 215; or both the first flow channel 238 and the second flow channel 239 communicate with the liquid outlet channel 213; when the reversing valve When the valve 237 is in the first position, the third channel 241 communicates with the guide channel 214 ; when the reversing valve 237 is in the second position, the third channel 241 communicates with the liquid outlet 216
  • the reversing valve 237 also It may include a fourth channel 242 that runs through the valve body of the reversing valve 237; The liquid outlet channel 213 is connected; when the reversing valve 237 is in the second position (as shown in FIG. 27 and FIG. 29 ), the fourth flow channel 242 is blocked from at least one of the liquid inlet channel 212 or the liquid outlet channel 213 .
  • the reversing valve 237 when the reversing valve 237 is set, the reversing valve 237 can maintain a normally open state with the liquid inlet channel 212, so that by turning the reversing valve 237, the reversing valve 237 can be connected with the liquid inlet 215 and the liquid outlet channel.
  • the reversing valve 237 can be rotatably connected with the pump body 210, and the first flow path 238, the second flow path 239 and the second flow path 239
  • the axes of the reversing valve 237 are in the same plane, so that the reversing valve 237 is switched between the first position and the second position by making the reversing valve 237 rotate relative to the pump body 210 . It should be noted that, when rotating, it is necessary to determine the position of the reversing valve 237 from the first position according to the angle between the first flow path 238, the second flow path 239, and the second flow path 239 or the angle between the two ends of the fourth flow path 242.
  • the angle of rotation is required; for example, the axes of the first flow channel 238, the second flow channel 239 and the second flow channel 239 are perpendicular to each other, and the axes of the first flow channel 238 and the second flow channel 239 coincide , the reversing valve 237 needs to rotate 180° when turning from the first position to the second position.
  • the diversion passage 214 communicates with the liquid inlet passage 212; when the reversing valve 237 is in the first position (as shown in Fig. The directional valve 237 communicates the outlet channel 213 with the diversion channel 214; 214 is blocked with the liquid outlet channel 213;
  • the diversion channel 214 communicates with the liquid outlet channel 213; when the reversing valve 237 is in the first position, the reversing valve 237 communicates the liquid inlet channel 212 with the diversion channel 214; when the reversing valve 237 is in the second position , the reversing valve 237 blocks the diversion channel 214 and the liquid inlet channel 212 .

Abstract

一种泵头和包括该泵头的柱塞泵，该泵头包括泵体(210)以及导流件(220)；泵体(210)具备活塞腔(211)、进液通道(212)以及出液通道(213)；进液通道(212)及出液通道(213)均与活塞腔(211)连通；导流件(220)与泵体(210)活动连接，导流件(220)用于将进液通道(212)与出液通道(213)导通。在需要泵头停止出液时，该导流件(220)能够将出液通道(213)与进液通道(212)导通，引导出液通道(213)中的液体流向进液通道(212)，使得液体在活塞腔(211)、进液通道(212)和出液通道(213)中循环，从而实现泵头停止输出液体。

Description

一种泵头和柱塞泵
相关申请的交叉引用
本申请要求于2021年06月08日提交中国专利局的申请号为202110637829.2、名称为“一种泵头和柱塞泵”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及医疗器械技术领域，具体而言，涉及一种泵头和柱塞泵。
背景技术
柱塞泵因其可输出高压力小流量的液体，已被应用于医用内窥镜下配合包括注射针或电切开刀在内的器械进行黏膜下隆起，在临床使用过程中，医生会根据需要随时启动、停止柱塞泵系统，以完成对黏膜隆起的控制。
目前采用的方案是：在出液口与电刀入口之间设置一个截止阀，启动泵时截止阀处于导通状态；1.系统停止时截止阀旋转一个角度实现对液体的截流此时存在截流的短暂过程中对压力泵系统内部密封提出了更高的要求；2.更换泵或者系统复位等的过程中远端出液口仍有液体输出，严重影响医生的使用感受。
发明内容
本申请的目的在于提供一种泵头和柱塞泵，其能够实现泵体进出液通道导通，实现液体在泵体内部循环。
本申请的实施例是这样实现的：
第一方面，本申请提供一种泵头，包括泵体以及导流件；
泵体具备活塞腔、进液通道以及出液通道；进液通道及出液通道均与活塞腔连通；
导流件与泵体活动连接，导流件用于将进液通道与出液通道导通。
在可选的实施方式中，泵体具备导流通道；导流通道与进液通道及出液通道连通。
在可选的实施方式中，导流件可活动地设置于导流通道内。
在可选的实施方式中，泵体具备进液口以及出液口；进液口与进液通道连通，出液口与出液通道连通；进液口、导流通道和出液口依次连通，且导流件能够在进液口、导流通道和出液口形成的通道内滑动。
在可选的实施方式中，导流件位于进液口或者出液口时，能够使进液通道与出液通道处于导通模式；导流件位于导流通道时，能够使进液通道与出液通道处于阻断模式。
在可选的实施方式中，导流件为滑块。
在可选的实施方式中，滑块包括第一分部以及与第一分部连接的第二分部，第二分部开设有第一导流孔及与第一导流孔连通的第二导流孔；当第一分部位于进液口，进液通道与出液通道处于导通模式；当第一分部位于导流通道时，进液通道与出液通道处于阻断模式；当第一分部位于出液口，第一导流孔与出液通道连通时，进液通道与出液通道处于导通模式。
在可选的实施方式中，导流件包括可滑动地设置于进液通道内的第一滑动件；
第一滑动件开设有第一孔道、第二孔道及第三孔道；第一孔道与进液通道连通；第二孔道、第三孔道分别沿进液通道的轴线反向间隔设置，且均与第一孔道连通；
当第一滑动件的第三孔道对应导流通道连通时，进液通道与出液通道处于导通模式；当第一滑动件的第二孔道对应进液口连通时，进液通道与出液通道处于阻断模式。
在可选的实施方式中，沿进液通道的轴线方向，进液通道的内周面还开设有供第一滑动件滑动的第一滑道。
在可选的实施方式中，导流件还包括可滑动地设置于出液通道内的第二滑动件；
第二滑动件开设有第四孔道、第五孔道及第六孔道；第四孔道与出液通道连通；第五孔道、第六孔道分别沿出液通道的轴线反向间隔设置，且均与第四孔道连通；
当第二滑动件的第五孔道对应导流通道连通时，进液通道与出液通道处于导通模式；当第二滑动件的第六孔道对应出液口连通时，进液通道与出液通道处于阻断模式。
在可选的实施方式中，沿出液通道的轴线方向，出液通道的内周面还开设有供第二滑动件滑动的第二滑道。
在可选的实施方式中，泵体具备活动通道，活动通道与导流通道连通，导流件可滑动设置于活动通道。
在可选的实施方式中，导流件位于活动通道内时，进液通道与出液通道处于导通模式；导流件位于导流通道内时，进液通道与出液通道处于阻断模式。
在可选的实施方式中，导流件包括与泵体可活动地连接的换向阀；
换向阀具有使进液通道与出液通道处于导通模式的第一位置；以及使进液通道与出液通道处于阻断模式的第二位置。
在可选的实施方式中，导流通道与进液通道连通；当换向阀处于第一位置时，换向阀将出液通道与导流通道连通；当换向阀处于第二位置时，换向阀将导流通道与出液通道阻断；
或，导流通道与出液通道连通；当换向阀处于第一位置时，换向阀将进液通道与导流通道连通；当换向阀处于第二位置时，换向阀将导流通道与进液通道阻断。
在可选的实施方式中，换向阀包括相互导通的第一流道、第二流道及第三流道；
第一流道及第二流道均与进液通道导通；当换向阀处于第一位置时，第三流道与导流通道连通；当换向阀处于第二位置时，第三流道与进液口连通；
或第一流道及第二流道均与出液通道导通；当换向阀处于第一位置时，第三流道与导流通道连通；当换向阀处于第二位置时，第三流道与出液口连通。
在可选的实施方式中，换向阀包括贯穿换向阀的阀体的第四流道；
当换向阀处于第一位置时，第四流道与进液通道及出液通道连通；当换向阀处于第二位置时，第四流道与进液通道或出液通道中的至少一个阻断。
第二方面，本申请提供一种柱塞泵，柱塞泵包括活塞、活塞杆、驱动机构以及上述的泵头；
活塞可滑动地设置于活塞腔内，且活塞与活塞杆连接；驱动机构与活塞杆传动连接，并用于驱动活塞相对于活塞腔往复运动，以使得进液通道液体向活塞腔输送，以及使得活塞腔中加压后的液体向出液通道输送。
本申请实施例的有益效果包括：
该泵头包括泵体以及导流件；泵体具备活塞腔、进液通道以及出液通道；进液通道及出液通道均与活塞腔连通；导流件与泵体活动连接，导流件用于将进液通道与出液通道导通。在需要泵头停止出液时，该导流件能够将出液通道与进液通道导通，引导出液通道中的液体流向进液通道，使得液体在活塞腔、进液通道和出液通道中循环，从而实现泵头停止输出液体。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，应当理解，以下附图仅示出了本申请的某些实施例，因此不应被看作是对范围的限定，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他相关的附图。
图1为本申请实施例中泵头的结构示意图；
图2为本申请实施例中泵头的剖视图；
图3为本申请实施例中导流件位于进液口时的结构示意图；
图4为本申请实施例中导流件位于导流通道时的结构示意图；
图5为本申请实施例中导流件位于出液口时的结构示意图；
图6为本申请其他实施例中滑块位于进液口时的结构示意图；
图7为本申请其他实施例中滑块的结构示意图；
图8为本申请其他实施例中滑块位于导流通道时的结构示意图；
图9为本申请其他实施例中滑块位于出液口时的结构示意图；
图10为本申请其他实施例中第一滑动件将进液通道与出液通道导通时的结构示意图；
图11为本申请其他实施例中第一滑动件的结构示意图；
图12为本申请其他实施例中第一滑动件将进液通道与出液通道阻断时的结构示意图；
图13为本申请其他实施例中第二滑动件将进液通道与出液通道导通时的结构示意图；
图14为本申请其他实施例中第二滑动件的结构示意图；
图15为本申请其他实施例中第二滑动件将进液通道与出液通道阻断时的结构示意图；
图16为本申请其他实施例中导流件将进液通道与出液通道导通时的结构示意图；
图17为本申请其他实施例中导流件将进液通道与出液通道阻断时的结构示意图；
图18为本申请其他实施例中导流件将进液通道与出液通道导通时的结构示意图；
图19为本申请其他实施例中导流件将进液通道与出液通道阻断时的结构示意图；
图20为本申请其他实施例中导流件将进液通道与出液通道导通时的结构示意图；
图21为本申请其他实施例中导流件将进液通道与出液通道阻断时的结构示意图；
图22为本申请其他实施例中换向阀处于第一位置时的结构示意图；
图23为本申请其他实施例中换向阀处于第二位置时的结构示意图；
图24为本申请其他实施例中换向阀处于第一位置时的结构示意图；
图25为本申请其他实施例中换向阀处于第二位置时的结构示意图；
图26为本申请其他实施例中换向阀处于第一位置时的结构示意图；
图27为本申请其他实施例中换向阀处于第二位置时的结构示意图；
图28为本申请其他实施例中换向阀处于第一位置时的结构示意图；
图29为本申请其他实施例中换向阀处于第二位置时的结构示意图。
图标:200-泵头；210-泵体；211-活塞腔；212-进液通道；213-出液通道；214-导流通道；215-进液口；216-出液口；220-导流件；221-滑块；222-第一分部；223-第二分部；224-第一导流孔；225-第二导流孔；226-第一滑动件；227-第一孔道；228-第二孔道；229-第三孔道；231-第一滑道；232-第二滑动件；233-第四孔道；234-第五孔道；235-第六孔道；236-第二滑道；217-活动通道；237-换向阀；238-第一流道；239-第二流道；241-第三流道；242-第四流道；111-活塞杆。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。通常在此处附图中描述和示出的本申请实施例的组件可以以各种不同的配置来布置和设计。
因此，以下对在附图中提供的本申请的实施例的详细描述并非旨在限制要求保护的本申请的范围，而是仅仅表示本申请的选定实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步定义和解释。
在本申请的描述中，需要说明的是，术语“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，或者是该发明产品使用时惯常摆放的方位或位置关系，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。此外，术语“第一”、“第二”、“第三”等仅用于区分描述，而不能理解为指示或暗示相对重要性。
此外，术语“水平”、“竖直”等术语并不表示要求部件绝对水平或悬垂，而是可以稍微倾斜。如“水平”仅仅是指其方向相对“竖直”而言更加水平，并不是表示该结构一定要完全水平，而是可以稍微倾斜。
在本申请的描述中，还需要说明的是，除非另有明确的规定和限定，术语“设置”、“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。
请参照图1-图5，图1示出了本申请实施例中泵头的结构，图2示出了本申请实施例中导流通道的结构，图3-图5示出了本申请实施例中导流件的结构；
本实施例提供一种柱塞泵，柱塞泵包括活塞、活塞杆111、驱动机构以及泵头200；
其中，泵头200包括泵体210以及导流件220；泵体210具备活塞腔211、进液通道212以及出液通道213；进液通道212及出液通道213均与活塞腔211连通；导流件220与泵体210活动连接，导流件220用于将进液通道212与出液通道213导通。
具体的，导流件220用于在停止出液(柱塞泵处于停止出液的状态)时将进液通道212与出液通道 213导通(如图3所示)；导流件220还用于在出液(柱塞泵处于出液的状态)时将出液通道213与进液通道212阻断(如图4所示)。
而活塞可滑动地设置于活塞腔211内，且活塞与活塞杆111连接；驱动机构与活塞杆111传动连接，并用于驱动活塞相对于活塞腔211往复运动。需要说明的是，活塞在活塞腔211中运动的过程中，将活塞腔211分隔为第一腔室及第二腔室，进液通道212及出液通道213均与第一腔室及第二腔室连通；且随着活塞的运动，第一腔室及第二腔室在进液状态及出液状态间转换；即，随着活塞的运动，当第一腔室与进液通道212导通并处于进液状态，第二腔室与出液通道213导通并处于排液状态时，进液通道212处于负压状态，出液通道213处于正压状态；同理，当第二腔室与进液通道212导通并处于进液状态，第一腔室与出液通道213导通并处于排液状态时，进液通道212处于负压状态，出液通道213处于正压状态；
故，随着活塞的运动，出液通道213中的压力高于进液通道212中的压力，进而在进液通道212与出液通道213导通时，由于进液通道212与出液通道213之间存在压力差，故出液通道213中的液体便会在压力的作用下向进液通道212流动。
请参照图1-图5，该柱塞泵的工作原理是：
该柱塞泵进液通道212及出液通道213均与活塞腔211连通，且活塞杆111在驱动机构的驱动作用下相对于活塞腔211往复运动，从而在活塞运动的过程中，将进液通道212中的液体吸入活塞腔211中，同时将活塞腔211中的液体排入出液通道213中；
而导流件220与泵体210连接，导流件220用于将进液通道212与出液通道213导通或阻断。由此，该导流件220能够在需要停止出液时，将出液通道213与进液通道212导通，从而引导出液通道213中的液体向进液通道212流动，进而能够使得液体在进液通道212、活塞腔211以及出液通道213中循环，从而避免出液口216出液。
需要说明的是，首先，这样的工作方式，在泵头200停流之后，由于此时出液通道213与进液通道212导通，故出液通道213中的液体在压力的作用下便会向进液通道212流动，从而能够避免出液通道213内始终存在较高的压力，进而能够避免泵头200因压力过大而出现泄漏的情况，从而能够降低对泵头200的结构密封性的要求，从而能够降低制造的成本；其次，由于在更换泵或者系统复位时，驱动机构需要恢复至初始位置，此时由于出液通道213与进液通道212导通，故在驱动装置在复位过程中，驱动装置复位过程中活塞腔211中输出的液体会在进入出液通道213后向进液通道212流动，从而能够避免换泵或系统在复位的过程中出液口216输出液体。
请参照图1-图9，图6-图9示出了本申请其他实施例中导流件的结构，泵体210具备导流通道214；导流通道214与进液通道212及出液通道213连通。
具体的，泵体210具备进液口215以及出液口216；进液口215与进液通道212连通，出液口216与出液通道213连通；进液口215、导流通道214和出液口216依次连通，且导流件220能够在进液口215、导流通道214和出液口216形成的通道内滑动。
由于导流件220可活动地设置在导流通道214内，故为调整该泵体210的导流状态，可以通过调整导流件220在导流通道214内的位置，从而使得进液口215与进液通道212间的导通路径被导流件220阻断、出液通道213与出液口216间的导通路径被导流件220阻断或进液通道212与出液通道213间的 导通路径被导流件220阻断；而由于该柱塞泵具备出液状态以及截流状态，为在泵头200停流之后，避免出液通道213内始终存在较高的压力，采用的是将进液通道212与出液通道213导通的方式。
导流件220位于进液口215或者出液口216时，能够使进液通道212与出液通道213处于导通模式；导流件220位于导流通道214时，能够使进液通道212与出液通道213处于阻断模式。即，可以通过调整导流件220在导流通道214内的位置，调整进液通道212与出液通道213的导通状态；
具体的，在导流件220位于进液口215时(如图3及图6所示)，进液通道212与进液口215间的导通路径被导流件220阻断，此时，由于导流通道214与进液通道212、出液通道213、进液口215以及出液口216连通，而在导流通道214中运动的导流件220将进液通道212与进液口215间的导流通道214部分阻断，故，此时导流通道214与进液通道212、出液通道213以及出液口216连通，由此，出液通道213中的液体能够经导流通道214进入至进液通道212中，从而能够使得液体在出液通道213、进液通道212以及活塞腔211中循环，从而避免出液通道213内始终存在较高的压力。需要说明的是，在此状态下，由于柱塞泵在工作的过程中，进液通道212中处于负压的状态，故虽然出液口216及进液通道212均与出液通道213导通，但由于进液通道212中压力较低，故活塞腔211向出液通道213输送的液体在流入出液通道213后，会在压力的作用下流入进液通道212中，从而能够避免出液口216存在出液的情况。
在导流件220位于出液口216时(如图5及图8所示)，出液通道213与出液口216间的导通路径被导流件220阻断，此时，由于导流通道214与进液通道212、出液通道213、进液口215以及出液口216连通，而在导流通道214中运动的导流件220将出液通道213与出液口216间的导流通道214部分阻断，故此时导流通道214与进液通道212、出液通道213以及进液口215连通，由此，由于导流件220将出液通道213与进液通道212导通，故出液通道213中的液体能够经导流通道214进入至进液通道212中，从而能够使得液体在出液通道213、进液通道212以及活塞腔211中循环，从而避免出液通道213内始终存在较高的压力。
需要说明的是，由上述内容可知，在本申请的实施例中，导流件220可活动地设置于导流通道214内，而为驱动导流件220在导流通道214内滑动，故泵头200还可以包括驱动部，驱动部可运用电机连接齿轮齿条机构、电机连接连杆机构、电磁阀连接活塞杆111机构、气缸连接活塞杆111机构或液压缸连接活塞杆111机构等机构来实现导流件220位置的变换，最终达到流体导向控制的目的。
由此，从上述内容可知，该导流件220能够在出液口216出液时，将出液通道213与出液口216导通，从而引导出液通道213中的液体向出液口216流动；而在停止出液时，可以将出液通道213与进液通道212导通，从而引导出液通道213中的液体向进液通道212流动，进而能够使得液体在进液通道212、活塞腔211以及出液通道213中循环，从而避免出液口216出液。
进一步地，请继续参照图1-图9，在设置导流件220时，导流件220可以为可滑动地设置于导流通道214内的滑块221，且在驱动部的作用下相对于进液口215、出液口216及导流通道214滑动，由此，可以通过驱动部驱动滑块221在进液口215、出液口216及导流通道214中滑动，从而改变滑块221的位置，以调整进液通道212与出液通道213的导通状态；
在本申请的其他实施例中，当滑块221可滑动地容置于导流通道214时，滑块221包括第一分部222以及与第一分部222连接的第二分部223，第二分部223开设有第一导流孔224及与第一导流孔224连 通的第二导流孔225；其中，第一分部222用于阻断进液口215、出液口216或导流通道214，第二导流孔225与导流通道214连通；而滑块221在外力的作用下具备第一分部222阻断进液口215、出液口216或导流通道214的位置；
具体的，当第一分部222位于进液口215(如图6所示)，进液口215与进液通道212阻断，进液通道212与出液通道213处于导通模式；
当第一分部222位于出液口216时(如图8所示)，出液口216与出液通道213阻断，出液通道213与第一导流孔224连通，第二导流孔225与第一导流孔224连通，第二导流孔225与导流通道214连通，导流通道214与进液通道212连通，故，进液通道212与出液通道213处于导通模式；
当第一分部222位于导流通道214时(如图9所示)，进液口215与第二导流孔225连通，第二导流孔225与第一导流孔224连通，第一导流孔224与进液通道212连通，故进液通道212与出液通道213处于阻断模式，且进液口215与进液通道212连通。
请参照图10-图15，图10-图12示出了本申请其他实施例中第一滑动件的结构，图13-图15示出了本申请其他实施例中第二滑动件的结构，在本申请的其他实施例中，在设置滑块221时，滑块221还可以滑动地容置于进液通道212或出液通道213内，且滑块221在驱动部的作用下相对于进液通道212或出液通道213滑动，由此，可以通过驱动部驱动滑块221在出液通道213中滑动，从而改变滑块221的位置。
具体的，请参照图10-图12，在设置导流件220时，导流件220可以包括可滑动地设置于进液通道212内的第一滑动件226；第一滑动件226开设有第一孔道227、第二孔道228及第三孔道229；第一孔道227与进液通道212连通；第二孔道228、第三孔道229分别沿进液通道212的轴线反向间隔设置，且均与第一孔道227连通；当第一滑动件226的第三孔道229对应导流通道214连通时，进液通道212与出液通道213处于导通模式；当第一滑动件226的第二孔道228对应进液口215连通时，进液通道212与出液通道213处于阻断模式。并且第一孔道227的轴线与进液通道212的轴线重合，第二孔道228的轴线及第三孔道229的轴线均与第一孔道227的轴线垂直；
由于第一孔道227沿进液通道212的轴线方向贯穿第一滑动件226，第一孔道227与进液通道212连通且轴线重合，故第一滑动件226在驱动部的作用下相对于进液通道212滑动时，能够与进液通道212保持导通的状态；而由于导流通道214及进液口215分别位于进液通道212的两侧，故第二孔道228及第三孔道229分别位于第一孔道227的两侧，且第三孔道229用于与导流通道214连通，第二孔道228用于与进液口215连通。
具体的，当第一滑动件226的第三孔道229对应导流通道214连通时，由于第三孔道229与第一孔道227连通，且导流通道214与出液通道213连通，第一孔道227与进液通道212连通，故进液通道212与出液通道213处于导通模式。
而当第一滑动件226的第二孔道228对应进液口215连通时，进液通道212与出液通道213处于阻断模式，从而使得进液口215与进液通道212连通，出液通道213与进液通道212阻断。
为对第一滑动件226在进液通道212中的滑动范围进行导向和限制，故沿进液通道212的轴线方向，进液通道212的内周面还开设有供第一滑动件226滑动的第一滑道231。
进一步地，请参照图13-图15，在设置导流件220时，导流件220还包括可滑动地设置于出液通道 213内的第二滑动件232；第二滑动件232开设有第四孔道233、第五孔道234及第六孔道235；第四孔道233与出液通道213连通；第五孔道234、第六孔道235分别沿出液通道213的轴线反向间隔设置，且均与第四孔道233连通；当第二滑动件232的第五孔道234对应导流通道214连通时，进液通道212与出液通道213处于导通模式；当第二滑动件232的第六孔道235对应出液口216连通时，进液通道212与出液通道213处于阻断模式。需要说明的是，第二滑动件232的工作原理与第一滑动件226的工作原理相同，故在此不再赘述。
为对第二滑动件232在出液通道213中的滑动范围进行导向和限制，故沿出液通道213的轴线方向，出液通道213的内周面还开设有供第二滑动件232滑动的第二滑道236。
进一步地，请参照图16-图21，图16-图21示出了本申请其他实施例中导流件220的结构；在本申请的其他实施例中，泵体210还可以具备活动通道217，活动通道217与导流通道214连通；导流件220可滑动地设置于活动通道217；导流件220位于活动通道217内时(如图16、图19及图20所示)，进液通道212与出液通道213处于导通模式；导流件220位于导流通道214内时(如图17、图18及图21所示)，进液通道212与出液通道213处于阻断模式。由此，当进液通道212与出液通道213导通时，导流件220位于活动通道217；当进液通道212与出液通道213阻断时，导流件220的至少部分位于导流通道214。
由此，可以通过驱动导流件220在活动通道217中滑动，从而改变导流件220的位置，进而使得导流通道214被导流件220导通或阻断；需要说明的是，在开设活动通道217时，活动通道217的延伸方向可以与进液通道212的延伸方向垂直，也可以与导流通道214的延伸方向垂直，或沿其他方向延伸。
请参照图22-图29，图22-图29示出了本申请其他实施例中换向阀的结构；进一步地，在本申请的其他实施例中，在设置导流件220时，导流件220可以包括与泵体210可活动地连接的换向阀237；换向阀237具有使进液通道212与出液通道213处于导通模式的第一位置(如图22、图25、图26及图28所示)；以及使进液通道212与出液通道213处于阻断模式的第二位置(如图23、图24、图27及图29所示)。
具体的，当换向阀237处于第一位置时，换向阀237将出液通道213与进液通道212导通；当换向阀237处于第二位置时，换向阀237将出液通道213与进液通道212阻断。
请参照图22-图25，在设置换向阀237时，换向阀237可以包括相互导通的第一流道238、第二流道239及第三流道241；第一流道238及第二流道239均与进液通道212导通；当换向阀237处于第一位置时(如图22及图25所示)，第三流道241与导流通道214连通；当换向阀237处于第二位置时(如图23及图24)，第三流道241与进液口215连通；或第一流道238及第二流道239均与出液通道213导通；当换向阀237处于第一位置时，第三流道241与导流通道214连通；当换向阀237处于第二位置时，第三流道241与出液口216连通。
请参照图26-图29，与上述设置相互导通的第一流道238、第二流道239及第三流道241的方式不同的是，在设置换向阀237时，换向阀237还可以包括贯穿换向阀237的阀体的第四流道242；当换向阀237处于第一位置时(如图26及图28所示)，第四流道242分别与进液通道212及出液通道213连通；当换向阀237处于第二位置时(如图27及图29所示)，第四流道242与进液通道212或出液通道213中的至少一个阻断。
综上，在设置换向阀237时，换向阀237可以与进液通道212保持常通的状态，从而通过转动换向阀237，以对换向阀237与进液口215和出液通道213间的导通状态进行调整，具体的，当换向阀237处于第一位置时，第一流道238及第二流道239均与出液通道213导通，第三流道241与出液通道213连通；而当换向阀237处于第二位置时，第一流道238及第二流道239均与出液通道213导通，第三流道241与进液口215连通；其外，在设置换向阀237时，也可以使得换向阀237与出液通道213保持常通的状态，从而通过转动换向阀237，以对换向阀237与出液口216和进液通道212间的导通状态进行调整，具体的，当换向阀237处于第一位置时，第一流道238及第二流道239均与出液通道213导通，第三流道241与进液通道212连通；而当换向阀237处于第二位置时，第一流道238及第二流道239均与出液通道213导通，第三流道241与出液口216连通。
为使得换向阀237能够在第一位置和第二位置间转换，故换向阀237可以与泵体210可转动地连接，且第一流道238、第二流道239及第二流道239的轴线处于同一平面内，由此，通过使得换向阀237相对于泵体210的转动，从而使得换向阀237在第一位置和第二位置间转换。需要说明的是，在转动时，需要根据第一流道238、第二流道239及第二流道239间的夹角或第四流道242两端的夹角确定换向阀237由第一位置转动至第二位置时，需要转动的角度；如，在第一流道238、第二流道239及第二流道239的轴线相互垂直，且第一流道238与第二流道239的轴线重合时，换向阀237由第一位置转动至第二位置时需要转动180°。
进一步地，请参照图26-图29，导流通道214与进液通道212连通；当换向阀237处于第一位置时(如图22、图25、图26及图28所示)，换向阀237将出液通道213与导流通道214连通；当换向阀237处于第二位置时(如图23、图24、图27及图29所示)，换向阀237将导流通道214与出液通道213阻断；
或，导流通道214与出液通道213连通；当换向阀237处于第一位置时，换向阀237将进液通道212与导流通道214连通；当换向阀237处于第二位置时，换向阀237将导流通道214与进液通道212阻断。
以上仅为本申请的具体实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (18)

  1. 一种泵头，其特征在于，包括：
    泵体(210)，所述泵体(210)具备活塞腔(211)、进液通道(212)以及出液通道(213)；所述进液通道(212)及所述出液通道(213)均与所述活塞腔(211)连通；以及
    导流件(220)，所述导流件(220)与所述泵体(210)活动连接，所述导流件(220)用于将所述进液通道(212)与所述出液通道(213)导通。
  2. 根据权利要求1所述的泵头，其特征在于：
    所述泵体(210)具备导流通道(214)；所述导流通道(214)与所述进液通道(212)及所述出液通道(213)连通。
  3. 根据权利要求2所述的泵头，其特征在于：
    所述导流件(220)可活动地设置于所述导流通道(214)内。
  4. 根据权利要求3所述的泵头，其特征在于：
    所述泵体(210)具备进液口(215)以及出液口(216)；所述进液口(215)与所述进液通道(212)连通，所述出液口(216)与所述出液通道(213)连通；所述进液口(215)、导流通道(214)和出液口(216)依次连通，且所述导流件(220)能够在进液口(215)、导流通道(214)和出液口(216)形成的通道内滑动。
  5. 根据权利要求4所述的泵头，其特征在于：
    所述导流件(220)位于进液口(215)或者出液口(216)时，能够使所述进液通道(212)与所述出液通道(213)处于导通模式；所述导流件(220)位于导流通道(214)时，能够使所述进液通道(212)与所述出液通道(213)处于阻断模式。
  6. 根据权利要求5所述的泵头，其特征在于：
    所述导流件(220)为滑块(221)。
  7. 根据权利要求6所述的泵头，其特征在于：
    所述滑块(221)包括第一分部(222)以及与所述第一分部(222)连接的第二分部(223)，所述第二分部(223)开设有第一导流孔(224)及与第一导流孔(224)连通的第二导流孔(225)；当第一分部(222)位于进液口(215)时，所述进液通道(212)与所述出液通道(213)处于导通模式；当第一分部(222)位于导流通道(214)时，所述进液通道(212)与所述出液通道(213)处于阻断模式；当第一分部(222)位于出液口(216)时，所述进液通道(212)与所述出液通道(213)处于导通模式。
  8. 根据权利要求2所述的泵头，其特征在于：
    所述导流件(220)包括可滑动地设置于所述进液通道(212)内的第一滑动件(226)；
    所述第一滑动件(226)开设有第一孔道(227)、第二孔道(228)及第三孔道(229)；所述第一孔道(227)与所述进液通道(212)连通；所述第二孔道(228)、所述第三孔道(229)分别沿所述进液通道(212)的轴线反向间隔设置，且均与所述第一孔道(227)连通；
    当所述第一滑动件(226)的所述第三孔道(229)对应所述导流通道(214)连通时，所述进液通道(212)与所述出液通道(213)处于导通模式；当所述第一滑动件(226)的所述第二孔道 (228)对应进液口(215)连通时，所述进液通道(212)与所述出液通道(213)处于阻断模式。
  9. 根据权利要求8所述的泵头，其特征在于：
    沿所述进液通道(212)的轴线方向，所述进液通道(212)的内周面还开设有供所述第一滑动件(226)滑动的第一滑道(231)。
  10. 根据权利要求2所述的泵头，其特征在于：
    所述导流件(220)还包括可滑动地设置于所述出液通道(213)内的第二滑动件(232)；
    所述第二滑动件(232)开设有第四孔道(233)、第五孔道(234)及第六孔道(235)；所述第四孔道(233)与所述出液通道(213)连通；所述第五孔道(234)、所述第六孔道(235)分别沿所述出液通道(213)的轴线反向间隔设置，且均与所述第四孔道(233)连通；
    当所述第二滑动件(232)的所述第五孔道(234)对应所述导流通道(214)连通时，所述进液通道(212)与所述出液通道(213)处于导通模式；当所述第二滑动件(232)的所述第六孔道(235)对应出液口(216)连通时，所述进液通道(212)与所述出液通道(213)处于阻断模式。
  11. 根据权利要求10所述的泵头，其特征在于：
    沿所述出液通道(213)的轴线方向，所述出液通道(213)的内周面还开设有供所述第二滑动件(232)滑动的第二滑道(236)。
  12. 根据权利要求2所述的泵头，其特征在于：
    所述泵体(210)具备活动通道(217)，所述活动通道(217)与所述导流通道(214)连通，所述导流件(220)可滑动设置于所述活动通道(217)。
  13. 根据权利要求12所述的泵头，其特征在于：
    所述导流件(220)位于所述活动通道(217)内时，所述进液通道(212)与所述出液通道(213)处于导通模式；所述导流件(220)位于所述导流通道(214)内时，所述进液通道(212)与所述出液通道(213)处于阻断模式。
  14. 根据权利要求2所述的泵头，其特征在于：
    所述导流件(220)包括与所述泵体(210)可活动地连接的换向阀(237)；
    所述换向阀(237)具有使所述进液通道(212)与所述出液通道(213)处于导通模式的第一位置；以及使所述进液通道(212)与所述出液通道(213)处于阻断模式的第二位置。
  15. 根据权利要求14所述的泵头，其特征在于：
    所述导流通道(214)与所述进液通道(212)连通；当所述换向阀(237)处于所述第一位置时，所述换向阀(237)将所述出液通道(213)与所述导流通道(214)连通；当所述换向阀(237)处于所述第二位置时，所述换向阀(237)将所述导流通道(214)与所述出液通道(213)阻断；
    或，所述导流通道(214)与所述出液通道(213)连通；当所述换向阀(237)处于所述第一位置时，所述换向阀(237)将所述进液通道(212)与所述导流通道(214)连通；当所述换向阀(237)处于所述第二位置时，所述换向阀(237)将所述导流通道(214)与所述进液通道(212)阻断。
  16. 根据权利要求14所述的泵头，其特征在于：
    所述换向阀(237)包括相互导通的第一流道(238)、第二流道(239)及第三流道(241)；
    所述第一流道(238)及所述第二流道(239)均与所述进液通道(212)导通；当所述换向阀(237)处于第一位置时，所述第三流道(241)与所述导流通道(214)连通；当所述换向阀(237)处于第二位置时，所述第三流道(241)与进液口(215)连通；
    或所述第一流道(238)及所述第二流道(239)均与所述出液通道(213)导通；当所述换向阀(237)处于第一位置时，所述第三流道(241)与所述导流通道(214)连通；当所述换向阀(237)处于第二位置时，所述第三流道(241)与出液口(216)连通。
  17. 根据权利要求14所述的泵头，其特征在于：
    所述换向阀(237)包括贯穿所述换向阀(237)的阀体的第四流道(242)；
    当所述换向阀(237)处于第一位置时，所述第四流道(242)与所述进液通道(212)及所述出液通道(213)连通；当所述换向阀(237)处于第二位置时，所述第四流道(242)与所述进液通道(212)或所述出液通道(213)中的至少一个阻断。
  18. 一种柱塞泵，其特征在于：
    所述柱塞泵包括活塞、活塞杆(111)、驱动机构以及如权利要求1-17中任意一项所述的泵头(200)；
    所述活塞可滑动地设置于所述活塞腔(211)内，且所述活塞与所述活塞杆(111)连接；所述驱动机构与所述活塞杆(111)传动连接，并用于驱动所述活塞相对于所述活塞腔(211)往复运动，以使得所述进液通道(212)液体向所述活塞腔(211)输送，以及使得所述活塞腔(211)中加压后的液体向所述出液通道(213)输送。
PCT/CN2022/090768 2021-06-08 2022-04-29 一种泵头和柱塞泵 WO2022257648A1 (zh)

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