Fluid conveying mechanism and nutrition pump

Abstract

The invention provides a fluid conveying mechanism and a nutrition pump, the fluid conveying mechanism comprises a conveying assembly and a connecting seat, the conveying assembly comprises a flow passage and a valve mechanism arranged on the flow passage, and the conveying assembly is mounted on the connecting seat. The fluid conveying mechanism is reliable in connection, the risk that the fluid conveying mechanism falls off from the nutrition pump can be avoided, and the free flow phenomenon can be prevented.

Description

Technical Field

[0001] The present application relates to the technical field of medical equipment, and in particular to a fluid delivery mechanism and a nutrition pump. Background Art

[0002] The nutrition pump is a nutrition infusion pump that can be used for nasogastric feeding. It can input water, nutrient solution and homemade rice milk of a certain concentration into the patient through the nasogastric tube to improve the patient's nutritional status.

[0003] The nutrition pump includes a nutrition pump host and an infusion tube installed on the nutrition pump host. Nutrient solution, cleaning fluid and other fluids are passed into the infusion tube. The infusion tube is installed on the nutrition pump host. The nutrition pump host provides driving force for the infusion tube to push the fluid in the infusion tube forward, so as to deliver nutrient solution and other fluids to the patient through the nasogastric tube.

[0004] However, in the existing nutrition pump, the connection between the infusion tube and the nutrition pump host is not secure, and there is a risk of the infusion tube falling off. Summary of the invention

[0005] In order to solve at least one of the problems mentioned in the background technology, the present application provides a fluid delivery mechanism and a nutrient pump. The fluid delivery mechanism is reliably connected to avoid the risk of falling off the nutrient pump and prevent the free flow phenomenon.

[0006] One aspect of the present application provides a fluid delivery mechanism, including a delivery component and a connecting seat, wherein the delivery component includes a flow passage and a valve mechanism disposed on the flow passage, and the delivery component is installed on the connecting seat.

[0007] In a possible implementation, the valve mechanism includes a valve housing and a valve core movably connected to the valve housing, and the valve housing includes an outlet and at least one inlet;

[0008] The valve core is movable between at least two positions, including an open position connecting the at least one inlet and the outlet, and a closed position blocking the at least one inlet and the outlet.

[0009] In a possible implementation manner, a reversing groove is provided on the valve core.

[0010] In a possible implementation, the delivery assembly further includes a liquid outlet pipe and at least one liquid inlet pipe, each of the liquid inlet pipes is respectively connected to a corresponding inlet of the valve mechanism, and the liquid outlet pipe is connected to an outlet of the valve mechanism.

[0011] In a possible implementation manner, a first locking structure is provided on the connecting seat, and the valve mechanism is detachably connected to the first locking structure.

[0012] In a possible implementation, the delivery assembly further includes a pipe joint, which is disposed on the flow passage; a second locking structure is disposed on the connection seat, and the pipe joint is detachably connected to the second locking structure.

[0013] In a possible implementation manner, a first positioning structure and / or a second positioning structure is further provided on the connecting seat.

[0014] In a possible implementation manner, an identification element is further provided on the connection socket.

[0015] Another aspect of the present application provides a nutrition pump, comprising a pump main unit and the fluid delivery mechanism as described above, wherein the fluid delivery mechanism is detachably connected to the pump main unit.

[0016] In a possible implementation manner, a switching member is provided on the pump main unit, and the switching member extends into a reversing groove of a valve core of the valve mechanism to drive the valve core to rotate.

[0017] In a possible implementation, the pump host is provided with an anti-dropping member, which can be moved to a locked position or an unlocked position;

[0018] When the anti-dropping piece is located at the locking position, the anti-dropping piece is connected to the connecting seat; when the anti-dropping piece is located at the unlocking position, the anti-dropping piece is separated from the connecting seat.

[0019] In a possible implementation manner, a fixing structure is provided on the pump main unit, and the fixing structure is detachably connected to the second positioning structure of the connecting seat.

[0020] In a possible implementation manner, a detection component is provided on the pump host to detect the installation status of the connecting socket.

[0021] The fluid delivery mechanism and nutrition pump provided by the present application include a delivery assembly and a connecting seat. The delivery assembly, as the main functional component of the fluid delivery mechanism, has a flow path for the fluid to pass through, and a valve mechanism is provided on the flow path. The valve mechanism has the functions of switching the fluid path and automatically blocking the fluid path. The delivery assembly is installed on the connecting seat, and the fluid delivery mechanism is detachably installed on the nutrition pump through the connecting seat. Fixing the delivery assembly by the connecting seat can prevent the fluid delivery mechanism from abnormally falling off from the nutrition pump, ensuring the normal operation of the nutrition pump. The valve mechanism cooperates with the connecting seat to prevent the free flow phenomenon of the delivery assembly and avoid harm to the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A schematic diagram of the structure of a nutrition pump provided in an embodiment of the present application;

[0024] Figure 2 for Figure 1 A schematic diagram of the structure of the nutrient pump after removing the fluid delivery mechanism;

[0025] Figure 3 A structural schematic diagram of a fluid delivery mechanism provided in an embodiment of the present application from one perspective;

[0026] Figure 4 for Figure 3 A structural schematic diagram of the fluid conveying mechanism from another perspective;

[0027] Figure 5 A schematic diagram of the structure of a conveying assembly provided in an embodiment of the present application;

[0028] Figure 6 A schematic diagram of the structure of the connecting socket provided in an embodiment of the present application.

[0029] Description of reference numerals:

[0030] 1- Nutrition pump;

[0031] 100-pump host; 200-conveying mechanism; 300-roller; 400-pump door;

[0032] 110-support pad; 120-display screen; 130-button; 140-indicator light; 150-support seat; 160-switching member; 170-anti-falling member; 180-clamping seat; 210-transporting assembly; 220-connecting seat;

[0033] 151-accommodating groove; 171-main rod; 172-locking rod; 181-card slot; 211-valve mechanism; 212-liquid inlet pipe; 213-liquid outlet pipe; 214-connecting pipe; 215-pipe joint; 221-main body; 222-pressing plate;

[0034] 1511-bubble sensor; 1512-pressure sensor; 2101-clip; 2111-valve housing; 2112-valve core; 2121-first liquid inlet pipe; 2122-second liquid inlet pipe; 2211-first limiting groove; 2212-second limiting groove; 2213-positioning groove; 2214-elastic clip; 2215-installation groove;

[0035] 21111-inlet; 21112-outlet; 21121-reversing groove; 22101-limiting strip; 22102-buckle groove; 22131-hole structure; 22141-buckle protrusion; 22142-stopper; 22151-identification element;

[0036] a-first entrance; b-second entrance. DETAILED DESCRIPTION

[0037] Improving the nutritional status of patients is the basic condition for disease treatment. Clinical nutrition is divided into enteral nutrition and parenteral nutrition. Enteral nutrition is more conducive to the metabolism and utilization of physiological nutrients in the human body. It can safely and effectively promote and maintain the complete gastrointestinal structure and function, protect the gastric mucosal barrier, reduce complications, and reduce treatment costs.

[0038] In clinic, water, nutrient solution and homemade rice milk of a certain concentration are generally delivered to patients through a nutrient pump (also known as an enteral nutrition pump) to provide nutrition to patients. The nutrient pump usually includes a nutrient pump host and an infusion component mounted on the nutrient pump host. The nutrient pump host provides driving force for the infusion component to push the fluid in the pipeline of the infusion component forward to deliver nutrient solution, cleaning fluid and other fluids to the patient.

[0039] However, in the existing nutrition pumps, the infusion component is not securely connected to the nutrition pump host and is prone to abnormal detachment from the nutrition pump host, affecting the normal operation of the nutrition pump and causing free flow of the infusion component, which may cause harm to the patient.

[0040] In view of this, the embodiment of the present application provides a fluid delivery mechanism and a nutrition pump, wherein the fluid delivery mechanism includes a delivery component and a connecting seat. The delivery component, as the main functional component of the fluid delivery mechanism, has a flow path for the fluid to pass through, and a valve mechanism is provided on the flow path, and the valve mechanism has the functions of switching the fluid path and automatically blocking the fluid path. The delivery component is mounted on the connecting seat, and the fluid delivery mechanism is detachably mounted on the nutrition pump through the connecting seat. Fixing the delivery component by the connecting seat can prevent the fluid delivery mechanism from abnormally falling off from the nutrition pump, thereby ensuring the normal operation of the nutrition pump. The valve mechanism cooperates with the connecting seat to prevent the free flow phenomenon of the delivery component, thereby avoiding harm to the patient.

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0042] Figure 1 A schematic diagram of the structure of a nutrition pump provided in an embodiment of the present application; Figure 2 for Figure 1 Schematic diagram of the structure of the nutrient pump after removing the fluid delivery mechanism.

[0043] Reference Figure 1 and Figure 2 As shown, an embodiment of the present application provides a nutrition pump 1, which includes a pump main unit 100, a fluid delivery mechanism 200, a roller 300 and a pump door 400. The pump main unit 100 is the main structure of the nutrition pump 1, the fluid delivery mechanism 200 and the roller 300 are detachably installed on the pump main unit 100, and the pump door 400 is movably connected to the pump main unit 100.

[0044] Among them, one side surface of the pump main unit 100 can be an operating surface, and the operator can operate the pump main unit 100 facing the operating surface of the pump main unit 100. The fluid conveying mechanism 200 and the roller 300 can be installed on the operating surface of the pump main unit 100, and the pump door 400 can also be covered on the operating surface of the pump main unit 100.

[0045] For example, the pump main unit 100 can be erected on a support base such as a desktop or a support frame, and a flexible support pad 110 can be provided on the bottom surface of the pump main unit 100 to avoid hard contact between the pump main unit 100 and the support base, increase the friction between the pump main unit 100 and the support base, ensure the stability of the pump main unit 100, and reduce the wear or scratch on the bottom surface of the pump main unit 100. One side surface of the pump main unit 100 can be an operating surface, and the operating surface can be perpendicular to its bottom surface, for example.

[0046] Combination Figure 1 and Figure 2 As shown, one side of the operation surface of the pump main unit 100 may be a display control area, and the other side may be an accessory installation area. The display control area is mainly used to display relevant information of the pump main unit 100, and the operator can operate in the display control area to control the operating state of the pump main unit 100. The accessory installation area is used to install some accessories that cooperate with the pump main unit 100. These accessories and the pump main unit 100 together constitute the nutrition pump 1 to realize the function of the nutrition pump 1 to transport nutrients.

[0047] A display screen 120, buttons 130, and indicator lights 140 may be provided in the display control area. The display screen 120 may occupy most of the display control area. The buttons 130 and indicator lights 140 may be provided on the sides of the display screen 120. The display screen 120 is used to display information such as operating parameters and function options of the nutrient pump 1. The buttons 130 may include buttons 130 such as a power button and a return button. The indicator lights 140 may include operating indicator lights 140, alarm indicator lights 140, and other indicator lights 140.

[0048] The aforementioned fluid delivery mechanism 200 and roller 300 can be installed in the accessory installation area, and the pump door 400 can be rotatably connected to the side wall of the pump main unit 100 and located on the side where the accessory installation area is located. The pump door 400 can only cover the accessory installation area to protect the accessories installed on the accessory installation area, while the display control area is exposed outside the pump door 400, so that the operator can observe the display screen 120 and operate the pump main unit 100. Exemplarily, the pump door 400 can be a transparent part, so that the working status of the accessories in the accessory installation area can be observed through the pump door 400, so as to observe the operating status of the nutrition pump 1 in real time.

[0049] Combination Figure 1 and Figure 2 As shown, the pipeline of the fluid conveying mechanism 200 can be arranged around the outer circumference of the roller 300, and the roller 300 generates a certain pressure on the pipeline of the fluid conveying mechanism 200, so that the pipeline of the fluid conveying mechanism 200 is in a stretched state. Among them, a driving device can be arranged in the pump host 100, and the driving force of the driving device can be transmitted to the roller 300, and the roller 300 rotates under the drive of the driving device.

[0050] When the driving device drives the roller 300 to rotate, the roller 300 generates a driving force on the fluid in the pipeline of the fluid delivery mechanism 200, pushing the fluid in the pipeline of the fluid delivery mechanism 200 to flow along the pipeline, so as to deliver the nutrients in the fluid delivery mechanism 200 to the patient; when the roller 300 stops rotating, the pipeline of the fluid delivery mechanism 200 is subjected to a greater pressure from the roller 300, the fluid passage in the pipeline is equivalent to being blocked, and the fluid in the pipeline stops flowing forward, and the nutrition pump 1 stops delivering nutrients to the patient.

[0051] A support seat 150 can also be installed in the accessory installation area on the operating surface of the pump main unit 100. The support seat 150 is used to limit the pipeline of the fluid conveying mechanism 200. For example, a receiving groove 151 can be provided on the support seat 150, and the pipeline of the fluid conveying mechanism 200 can be located in the receiving groove 151 to limit the fluid conveying mechanism 200 and define the extension direction of the pipeline of the fluid conveying mechanism 200, which helps to make the pipeline of the fluid conveying mechanism 200 more smoothly wrapped around the periphery of the roller 300.

[0052] The fluid conveying mechanism 200 and the connection structure between the fluid conveying mechanism 200 and the pump host 100 are described in detail below.

[0053] Figure 3 A structural schematic diagram of a fluid delivery mechanism provided in an embodiment of the present application from one perspective; Figure 4 for Figure 3 A structural schematic diagram of the fluid conveying mechanism from another perspective.

[0054] Reference Figure 3 or Figure 4 As shown, the fluid delivery mechanism 200 includes a delivery assembly 210 and a connection seat 220. The delivery assembly 210 is the main functional component of the fluid delivery mechanism 200. A flow path for fluid to pass through is formed inside the delivery assembly 210 to deliver the aforementioned fluid nutrients such as water, nutrient solution, and homemade rice milk of a certain concentration to the patient. The delivery assembly 210 is installed on the connection seat 220, and the connection seat 220 is detachably connected to the pump host 100 to fix the fluid delivery mechanism 200 on the pump host 100.

[0055] By installing the delivery assembly 210 on the connection base 220 and fixing the delivery assembly 210 on the pump main unit 100 by using the connection base 220, the delivery assembly 210 can be prevented from abnormally falling off from the pump main unit 100, for example, the delivery assembly 210 can be prevented from falling off from the pump main unit 100 during the process of delivering nutrients to the patient. The abnormal falling off of the delivery assembly 210 can be avoided to affect the normal operation of the nutrition pump 1, and the fluid in the delivery assembly 210 can be prevented from generating unexpected gravity infusion due to free flow, so as to avoid causing harm to the patient.

[0056] Furthermore, for the conveying component 210 formed by the soft rubber tube, the connecting seat 220 provides protection for the soft rubber tube, which can enhance the structural strength of the fluid conveying mechanism 200, and can also support and position the conveying component 210, thereby helping the conveying component 210 to maintain a certain shape structure, making it easier for the pipeline of the conveying component 210 to be sleeved on the roller 300, and facilitating the conveying component 210 to remain connected to the roller 300 to prevent the pipeline of the conveying component 210 from detaching from the roller 300.

[0057] A valve mechanism 211 is provided on the conveying component 210. The valve mechanism 211 is provided on the flow path of the conveying component 210. The valve mechanism 211 can be controlled by the pump host 100 to rotate to change the connectivity state of the flow path in the conveying component 210. For example, the valve mechanism 211 can be in a state of connecting the flow path or in a state of cutting off the flow path. When the conveying component 210 has more than two flow paths, the valve mechanism 211 can also switch between different flow paths.

[0058] In this way, on the basis of fixing the delivery assembly 210 to the pump main unit 100 through the connection seat 220, the valve mechanism 211 can also prevent the fluid in the delivery assembly 210 from free flow. For example, when the delivery assembly 210 is detached from the pump main unit 100, the valve mechanism 211 can be rotated to cut off the flow path of the delivery assembly 210 to prevent the liquid in the delivery assembly 210 from continuing to flow, and prevent the delivery assembly 210 from generating unexpected gravity infusion, so as to avoid causing harm to the patient.

[0059] Figure 5 This is a schematic diagram of the structure of the conveying assembly provided in the embodiment of the present application. Figure 5 As shown, the delivery component 210 includes at least one liquid inlet tube 212 and a liquid outlet tube 213. The inlet of each liquid inlet tube 212 is connected to a corresponding liquid storage device (such as a liquid storage bag or a liquid storage box), and the outlet of the liquid outlet tube 213 is connected to the patient's nasal cavity or oral cavity. For example, the liquid outlet tube 213 is connected to the patient's nasal cavity through a nasogastric tube, and the valve mechanism 211 is connected between the outlet of each liquid inlet tube 212 and the inlet of the liquid outlet tube 213.

[0060] For the valve mechanism 211 disposed on the flow path of the conveying assembly 210, the valve mechanism 211 can be connected between each liquid inlet pipe 212 and the liquid outlet pipe 213. The valve mechanism 211 has at least one inlet 21111 and an outlet 21112. Each inlet 21111 of the valve mechanism 211 is in communication with each liquid inlet pipe 212, and the outlet 21112 of the valve mechanism 211 is in communication with the liquid outlet pipe 213; in other words, the outlets of each liquid inlet pipe 212 of the conveying assembly 210 are respectively connected to the corresponding inlet 21111 of the valve mechanism 211, and the inlet of the liquid outlet pipe 213 of the conveying assembly 210 is in communication with the outlet 21112 of the valve mechanism 211.

[0061] Continue to refer to Figure 5 As shown, in this embodiment, the conveying assembly 210 may further include a connecting pipe 214, the connecting pipe 214 is connected between the valve mechanism 211 and the liquid outlet pipe 213, one end of the connecting pipe 214 is connected to the outlet 21112 of the valve mechanism 211, the other end of the connecting pipe 214 is connected to the inlet of the liquid outlet pipe 213 through a pipe joint 215, and the liquid outlet pipe 213 is connected to the outlet 21112 of the valve mechanism 211 through the connecting pipe 214. In other words, each of the liquid inlet pipe 212, the connecting pipe 214 and the liquid outlet pipe 213 together constitute a flow path of the conveying assembly 210, and the valve mechanism 211 and the pipe joint 215 are provided on the flow path.

[0062] By providing a connecting pipe 214 between the valve mechanism 211 and the liquid outlet pipe 213, the connecting pipe 214 and the liquid outlet pipe 213 are connected via a pipe joint 215. In this way, the connecting pipe 214 can be completely separated from the conveying assembly 210, and when the fluid conveying mechanism 200 is assembled with the roller 300 installed on the pump main body 100, the connecting pipe 214 can be wound around the outer periphery of the roller 300 (see Figure 1 As shown), the liquid outlet pipe 213 is prevented from being squeezed by the roller 300. When the connecting pipe 214 is squeezed and deformed, only the connecting pipe 214 needs to be replaced, and other components of the conveying assembly 210 do not need to be replaced, which can save the use cost of the fluid conveying mechanism 200.

[0063] Furthermore, for the conveying assembly 210 wound around the outer periphery of the roller 300, the valve mechanism 211 and the pipe joint 215 are respectively located on both sides of the conveying assembly 210, and the conveying assembly 210 can be fixed on the connecting seat 220 by using the valve mechanism 211 and the pipe joint 215, so that both sides of the conveying assembly 210 are fixed, and the conveying assembly 210 can be stably and reliably fixed on the connecting seat 220. The connecting seat 220 has a better shaping effect on the conveying assembly 210, and can help the connecting pipe 214 in the conveying assembly 210 maintain a "U-shaped" bending state, so that the connecting pipe 214 is convenient for winding around the roller 300.

[0064] Of course, in other embodiments, the conveying assembly 210 may not be provided with the connecting pipe 214, and the inlet of the liquid outlet pipe 213 is directly connected to the outlet 21112 of the valve mechanism 211, and the liquid outlet pipe 213 itself can be bent in a "U-shape" shape so that the liquid outlet pipe 213 is arranged around the outer periphery of the roller 300. Among them, by providing a fixing structure on the outer wall of the liquid outlet pipe 213, the two sides of the conveying assembly 210 can be fixed on the connecting seat 220 through the fixing structures on the valve mechanism 211 and the outer wall of the liquid outlet pipe 213.

[0065] The following description is made by taking an example that the conveying assembly 210 includes a connecting pipe 214 connected between the valve mechanism 211 and the liquid outlet pipe 213 , and the connecting pipe 214 is connected to the liquid outlet pipe 213 via a pipe joint 215 .

[0066] When the connecting pipe 214 of the conveying assembly 210 is wound around the roller 300, the support seat 150 installed on the pump main body 100 can be used to guide and limit the connecting pipe 214. For example, two accommodating grooves 151 can be provided on the support seat 150, and the connecting pipes 214 located on both sides of the roller 300 extend into the two accommodating grooves 151 respectively (see Figure 1 shown).

[0067] In addition, some sensors may be arranged at the position of the receiving groove 151 to detect the operating state of the conveying component 210. For example, a bubble sensor 1511 and a pressure sensor 1512 may be arranged in the receiving groove 151. The bubble sensor 1511 is used to detect bubbles in the connecting pipe 214 to determine whether the fluid in the conveying component 210 has flow interruption or slow flow. The pressure sensor 1512 is used to detect the pressure in the connecting pipe 214 to determine whether the flow rate and flow velocity of the fluid in the conveying component 210 are normal. Among them, the bubble sensor 1511 and the pressure sensor 1512 may be arranged in two receiving grooves 151 respectively to ensure that there is enough installation space for the pressure sensor 1512 and the bubble sensor 1511.

[0068] As for the specific structure of the valve mechanism 211, continue to refer to Figure 5 The valve mechanism 211 includes a valve housing 2111 and a valve core 2112. The valve housing 2111 has a cavity. The valve core 2112 is installed in the cavity of the valve housing 2111, and the valve core 2112 can rotate in the valve housing 2111. Each inlet 21111 and outlet 21112 of the valve mechanism 211 are arranged on the valve housing 2111, or in other words, at least one inlet 21111 and outlet 21112 are arranged on the valve housing 2111, and each inlet 21111 and outlet 21112 on the valve housing 2111 are communicated with the cavity in the valve housing 2111.

[0069] Under the control of the pump host 100 , the valve core 2112 can rotate between at least two positions, including at least an open position and a closed position.

[0070] When the valve core 2112 is in the open position, the valve core 2112 can connect an inlet 21111 and an outlet 21112 of the valve housing 2111; or, when the valve core 2112 is in the open position, the valve core 2112 allows the fluid to flow from an inlet 21111 of the valve housing 2111 to the outlet 21112. When the valve core 2112 is in the closed position, the valve core 2112 does not connect any inlet 21111 and an outlet 21112 of the valve housing 2111; or, when the valve core 2112 is in the closed position, the valve core 2112 prevents the fluid from flowing from any inlet 21111 of the valve housing 2111 to the outlet 21112.

[0071] After the fluid delivery mechanism 200 is assembled on the pump host 100 , the pump host 100 can control the movement state of the valve core 2112 of the valve mechanism 211 according to the instructions input by the operator. When the valve core 2112 is in the open position, a certain inlet 21111 of the valve mechanism 211 is connected with the outlet 21112, and the valve mechanism 211 can connect the corresponding inlet pipe 212 and the outlet pipe 213, and the fluid in the liquid storage device connected to the inlet of the inlet pipe 212 can enter the inlet pipe 212, flow from the inlet pipe 212 to the outlet pipe 213, and finally be delivered to the patient by the outlet pipe 213; when the valve core 2112 is in the closed position, any inlet 21111 of the valve mechanism 211 is not connected with the outlet 21112, and the valve mechanism 211 blocks the connection path between all the inlet pipes 212 and the outlet pipes 213, and the fluid in the liquid storage device connected to the inlet of all the inlet pipes 212 cannot enter the outlet pipe 213, thereby preventing the free flow of the fluid in the conveying component 210.

[0072] Continue to refer to Figure 5 As shown in the figure, the conveying assembly 210 includes two liquid inlet pipes 212, and the two liquid inlet pipes 212 can be used to convey different fluids. In other words, the fluids contained in the liquid storage device connected to the inlets of the two liquid inlet pipes 212 can be different. For ease of description, the two liquid inlet pipes 212 of the conveying assembly 210 are defined as a first liquid inlet pipe 2121 and a second liquid inlet pipe 2122, respectively, and the fluid conveyed by the first liquid inlet pipe 2121 is a nutrient solution, and the fluid conveyed by the second liquid inlet pipe 2122 is a cleaning solution (such as physiological saline or purified water) as an example for description.

[0073] Correspondingly, two inlets 21111 are provided on the valve housing 2111 of the valve mechanism 211. For the convenience of explanation, this embodiment defines the two inlets 21111 on the valve housing 2111 as a first inlet a and a second inlet b, respectively. The first liquid inlet pipe 2121 of the conveying component 210 is connected to the first inlet a on the valve housing 2111, and the second liquid inlet pipe 2122 of the conveying component 210 is connected to the second inlet b on the valve housing 2111.

[0074] In this regard, the valve core 2112 can have two open positions, which are a first open position and a second open position. When the valve core 2112 is in the first open position, the first liquid inlet pipe 2121 is connected to the liquid outlet pipe 213, and the nutrient solution in the first liquid inlet pipe 2121 can flow to the liquid outlet pipe 213 to deliver the nutrient solution to the patient; when the valve core 2112 is in the second open position, the second liquid inlet pipe 2122 is connected to the liquid outlet pipe 213, and the cleaning solution in the second liquid inlet pipe 2122 can flow to the liquid outlet pipe 213 to clean the pipeline of the delivery component 210.

[0075] In addition to the delivery assembly 210 shown in the figure including two liquid inlet pipes 212, in other embodiments, the delivery assembly 210 may also include only one liquid inlet pipe 212, and the liquid inlet pipe 212 may be used to deliver nutrient solution or cleaning solution. At this time, the valve core 2112 may have an open position, and when the valve core 2112 is in the open position, the liquid inlet pipe 212 is connected to the liquid outlet pipe 213.

[0076] Of course, the delivery assembly 210 may also include more than three liquid inlet pipes 212, and different liquid inlet pipes 212 are used to deliver different fluids. For example, the delivery assembly 210 includes three liquid inlet pipes 212, and the three liquid inlet pipes 212 can be used to deliver the first nutrient solution, the second nutrient solution, and the cleaning solution, respectively. At this time, the valve core 2112 may also have more than three opening positions. When in different opening positions, the corresponding liquid inlet pipe 212 is connected to the liquid outlet pipe 213, and the fluid in the corresponding liquid inlet pipe 212 can flow to the liquid outlet pipe 213.

[0077] In addition, when the delivery assembly 210 is installed on the pump host 100, the delivery assembly 210 is roughly "U-shaped", so that the liquid inlet pipe 212 and the connecting pipe 214 on the same side of the delivery assembly 210 are arranged roughly along a straight line. In this regard, the inlet 21111 and the outlet 21112 of the valve housing 2111 of the valve mechanism 211 can be arranged relatively. Taking the delivery assembly 210 including the first liquid inlet pipe 2121 and the second liquid inlet pipe 2122 as an example, the first liquid inlet pipe 2121 and the second liquid inlet pipe 2122 can be arranged side by side, and correspondingly, the first inlet a and the second inlet b on the valve housing 2111 can be arranged side by side on the opposite side of the outlet 21112.

[0078] As for the specific method of driving the valve core 2112 of the valve mechanism 211 by the pump main unit 100, refer to Figure 5 As shown, one end of the valve housing 2111 facing the pump main unit 100 may be open, and the valve core 2112 may be installed in the cavity of the valve housing 2111 through the opening of the valve housing 2111, and a reversing groove 21121 may be provided on the side of the valve core 2112 facing the pump main unit 100, and the reversing groove 21121 is exposed in the opening of the valve housing 2111. A switching member 160 is provided on the pump main unit 100, and the switching member 160 extends into the reversing groove 21121 of the valve core 2112 to drive the valve core 2112 to move, so as to realize the switching of the valve core 2112 between different positions.

[0079] It should be noted that a driving mechanism for driving the switching member 160 to move is also provided in the pump host 100. After receiving the instruction input by the operator, the pump host 100 drives the switching member 160 to move through the driving mechanism, so that the switching member 160 drives the reversing groove 21121 to move to the corresponding range, and the valve core 2112 is switched to the corresponding position. For example, the valve core 2112 is switched from the closed position to a certain open position, or the valve core 2112 is switched from a certain open position to another open position, or the valve core 2112 is switched from a certain open position to the closed position.

[0080] In the embodiment shown in the figure, the switching member 160 is a rotating shaft structure, and the driving mechanism drives the switching member 160 to rotate to achieve the switching between different positions of the valve core 2112. It can be understood that in other embodiments, the driving mechanism can also drive the switching member 160 to translate or make other movements to achieve the switching between different positions of the valve core 2112.

[0081] In addition, the shape and size of the switching member 160 on the pump main unit 100 should match the shape and size of the reversing groove 21121 on the valve core 2112, so that the switching member 160 can extend into the reversing groove 21121 on the valve core 2112 and can drive the valve core 2112 to move.

[0082] Exemplarily, the reversing groove 21121 on the valve core 2112 can be a through groove that passes through the opposite sides of the valve core 2112, or, the reversing groove 21121 on the valve core 2112 can also be a non-through groove, and the shape of the reversing groove 21121 can be a square, triangle, parallelogram, trapezoid or the like.

[0083] Generally, before the fluid delivery mechanism 200 is assembled to the pump main unit 100, the valve core 2112 of the valve mechanism 211 should be in a closed position to block all flow paths in the delivery assembly 210 and prevent the free flow of the fluid in the delivery assembly 210. At this time, the orientation of the switching member 160 on the pump main unit 100 should correspond to the orientation of the reversing groove 21121 on the valve core 2112, so that when the fluid delivery mechanism 200 is assembled to the pump main unit 100, the switching member 160 can smoothly extend into the reversing groove 21121 of the valve core 2112.

[0084] When the fluid conveying mechanism 200 is assembled to the pump host 100, the reversing groove 21121 on the valve core 2112 of the valve mechanism 211 faces the pump host 100, which makes it inconvenient to observe the orientation of the reversing groove 21121. In order to smoothly assemble the fluid conveying mechanism 200 to the pump host 100, the present embodiment positions the initial position of the valve core 2112. In other words, the orientation of the reversing groove 21121 when the valve core 2112 is in the closed position is limited to ensure that the reversing groove 21121 on the valve core 2112 can be aligned with the switching member 160 on the pump host 100.

[0085] Taking the reversing groove 21121 on the valve core 2112 as a through groove that passes through the opposite sides of the valve core 2112 as an example, when the valve core 2112 of the valve mechanism 211 is in a closed position, the reversing groove 21121 can be horizontally placed between the inlet 21111 and the outlet 21112 of the valve housing 2111, for example, the extension direction of the reversing groove 21121 can be perpendicular to the outlet 21112 of the valve housing 2111. In this way, when assembling the valve mechanism 211, the installation orientation of the valve core 2112 can be adjusted according to the position of the outlet 21112 on the valve housing 2111, so that the reversing groove 21121 of the valve core 2112 is perpendicular to the outlet 21112 of the valve housing 2111, so as to accurately position the initial position of the valve core 2112.

[0086] Figure 6 This is a schematic diagram of the structure of the connection socket provided in the embodiment of the present application. Figure 4 and Figure 6 As shown, as for the specific structure of the connecting seat 220, the connecting seat 220 may include a main body 221, and the conveying component 210 may be installed on the main body 221 of the connecting seat 220, and the conveying component 210 is fixed by relying on the main body 221 of the connecting seat 220.

[0087] The main body 221 of the connection seat 220 can be mainly arranged corresponding to the position where the valve mechanism 211 and the pipe joint 215 of the conveying assembly 210 are located, and the valve mechanism 211 and the pipe joint 215 can be connected to the main body 221 to fix the conveying assembly 210 on the main body 221. The bending part of the connecting pipe 214 can be located outside the connection seat 220 to avoid interference between the connecting seat 220 and the roller 300 when the fluid conveying mechanism 200 is installed on the pump host 100, so as to ensure that the connecting pipe 214 is smoothly sleeved on the roller 300.

[0088] On the basis of ensuring that the connection seat 220 does not interfere with the roller 300 and does not affect the connection between the connection pipe 214 and the roller 300, the connection seat 220 may further include a pressure plate 222 connected to the main body 221. The pressure plate 222 may be integrally formed on the main body 221, and the pressure plate 222 may be located at one end of the main body 221 facing the connection pipe 214. The pressure plate 222 may be located on a side of the connection pipe 214 away from the pump host 100. For example, the pressure plate 222 may extend from a side of the main body 221 away from the pump host 100 (see Figure 1 shown).

[0089] The pressure plate 222 of the connecting seat 220 is blocked above the support seat 150 on the pump main unit 100. Under the joint action of the pressure plate 222 and the support seat 150, the connecting pipe 214 is restricted in the receiving groove 151 of the support seat 150 to ensure that the connecting pipe 214 and the sensors in the receiving groove 151 (such as the bubble sensor 1511 and the pressure sensor 1512) are in stable contact, thereby ensuring the detection effect of the sensor.

[0090] In addition, during the process of the roller 300 rotating and squeezing the connecting tube 214, the connecting tube 214 will inevitably produce a small amount of shaking. By setting a pressure plate 222 on the connecting seat 220 to block above the connecting tube 214, the pressure plate 222 has a resisting effect on the shaking of the connecting tube 214, which can reduce the shaking amplitude of the connecting tube 214 and improve the stability of the connecting tube 214.

[0091] Continue to refer to Figure 6 As for the fixing method of the conveying component 210 on the connecting seat 220, in this embodiment, a first locking structure can also be provided on the connecting seat 220, and the first locking mechanism can be located at the main body 221 of the connecting seat 220. The valve mechanism 211 is detachably connected to the first locking mechanism to fix the valve mechanism 211 on the connecting seat 220.

[0092] The first locking structure may be a first limiting groove 2211 provided on the connection seat 220, the notch of the first limiting groove 2211 may face the pump host 100, or in other words, the first limiting groove 2211 extends from one side of the connection seat 220 facing the pump host 100 to the other side of the connection seat 220, and the valve mechanism 211 of the delivery assembly 210 is installed in the first limiting groove 2211. In this way, the reversing groove 21121 on the valve core 2112 of the valve mechanism 211 is exposed to the notch of the first limiting groove 2211, so that the reversing groove 21121 of the valve core 2112 is connected to the switching member 160 on the pump host 100; and the groove bottom of the first limiting groove 2211 blocks the valve mechanism 211, thereby protecting the valve mechanism 211 and preventing the valve mechanism 211 from being damaged by external force.

[0093] Combination Figure 4 and Figure 6 As shown, the space occupied by the main body 221 of the connection seat 220 can be relatively large, and the main body 221 is not limited to being connected with the valve mechanism 211. The extension length of the first limiting groove 2211 as the first locking mechanism on the main body 221 can also be relatively long, and the first limiting groove 2211 can include at least two parts, one part corresponds to the valve mechanism 211, and the contour of the part can match the outer contour of the valve mechanism 211, and the other part can correspond to the connection part between the connecting pipe 214 and the valve mechanism 211, and the connection part between the valve mechanism 211 and the connecting pipe 214 can be supported in the first limiting groove 2211, and the inner side wall of the first limiting groove 2211 can be provided with a raised limiting strip 22101, and the connection part between the valve mechanism 211 and the connecting pipe 214 is clamped between the limiting strips 22101 on both sides.

[0094] The first limiting groove 2211 and the valve mechanism 211 are provided with mutually matching positioning structures to lock the valve mechanism 211 in the first limiting groove 2211. For example, the groove walls on both sides of the first limiting groove 2211 corresponding to the valve mechanism 211 are provided with buckle grooves 22102 (see Figure 6 ), the outer side walls of the valve housing 2111 of the valve mechanism 211 are provided with buckles 2101 (see Figure 5 ), the buckle 2101 of the valve mechanism 211 is snapped into the buckle groove 22102 of the first limiting groove 2211, so that the valve mechanism 211 is snapped into the first limiting groove 2211 (see Figure 4 ).

[0095] In addition, it can be understood that when the outer walls on both sides of the valve shell 2111 of the valve mechanism 211 are provided with buckles 2101, for the situation where the initial position of the valve core 2112 is that the extension direction of the reversing groove 21121 is perpendicular to the outlet 21112 of the valve shell 2111, the valve core 2112 can also be positioned according to the buckles 2101 on both sides of the valve shell 2111, so that the two ends of the reversing groove 21121 of the valve core 2112 respectively correspond to the buckles 2101 on both sides of the valve shell 2111, so that the valve core 2112 is in the corresponding orientation when it is in its closed position.

[0096] Continue to refer to Figure 6 As for the fixation of the pipe joint 215 on the connecting seat 220, a second locking structure can also be provided on the connecting seat 220. The second locking mechanism can be located at the main body 221 of the connecting seat 220. The pipe joint 215 can be detachably connected to the second locking mechanism to fix the pipe joint 215 on the connecting seat 220.

[0097] Similar to the first locking structure being the first limiting groove 2211 provided on the main body 221, the second locking mechanism may be the second limiting groove 2212 provided on the main body 221, and the notch of the second limiting groove 2212 may also face the pump host 100, or in other words, the second limiting groove 2212 extends from one side of the connecting seat 220 facing the pump host 100 to the other side of the connecting seat 220, and the pipe joint 215 of the conveying assembly 210 is installed in the second limiting groove 2212. In this way, the bottom of the second limiting groove 2212 blocks the pipe joint 215, thereby protecting the pipe joint 215 and preventing the pipe joint 215 from being damaged by external forces.

[0098] In addition, the extension length of the second limiting groove 2212 on the main body 221 serving as the second locking mechanism may also be longer, and the pipe joint 215 may be installed in the middle part of the second limiting groove 2212. The connection part between the pipe joint 215 and the connecting pipe 214 and the connection part between the pipe joint 215 and the liquid outlet pipe 213 are respectively located at the two ends of the second limiting groove 2212. The inner side wall of the second limiting groove 2212 may also be provided with a raised limiting strip 22101. The connection part between the pipe joint 215 and the connecting pipe 214 and the connection part between the pipe joint 215 and the liquid outlet pipe 213 are both clamped between the limiting strips 22101 on both sides.

[0099] The second limiting groove 2212 and the pipe joint 215 are also provided with mutually cooperating positioning structures to lock the pipe joint 215 in the second limiting groove 2212. Similar to the cooperation between the first limiting groove 2211 and the valve mechanism 211, the groove walls on both sides of the portion of the second limiting groove 2212 corresponding to the pipe joint 215 are provided with snap grooves 22102 (see Figure 6 ), the outer side walls of the pipe joint 215 are provided with buckles 2101 (see Figure 5 ), the buckle 2101 of the pipe joint 215 is snapped into the buckle groove 22102 of the second limiting groove 2212, so that the pipe joint 215 is snapped into the second limiting groove 2212 (see Figure 4 ).

[0100] For example, the first limiting groove 2211 and the second limiting groove 2212 provided on the main body 221 of the connection seat 220 are respectively located on both sides of the main body 221, and the size of the connection seat 220 can match the size of the conveying assembly 210, so as to make the design of the connection seat 220 more reasonable. In addition, the part between the first limiting groove 2211 and the second limiting groove 2212 on the connection seat 220 can also be designed, and the connection between the connection seat 220 and the pump host 100 can be realized by using the part, so as to make full use of the space of the connection seat 220.

[0101] Of course, in other examples, the first locking structure and the second locking structure on the connection seat 220 may also be other structures, and the valve mechanism 211 and the pipe joint 215 of the conveying assembly 210 may also be connected to the connection seat 220 in other ways. For example, the first locking structure and the second locking structure on the connection seat 220 may be locking holes opened on the main body 221, and the valve mechanism 211 and the pipe joint 215 of the conveying assembly 210 are both provided with corresponding mounting holes, and the conveying assembly 210 is fixed to the connection seat 220 by inserting fasteners such as screws and bolts into the locking holes and the mounting holes.

[0102] The following description will be made by taking the first locking structure and the second locking structure on the connecting seat 220 , which are respectively the first limiting groove 2211 and the second limiting groove 2212 set on both sides of the main body 221 thereof, as an example.

[0103] As for the connection method between the connection base 220 and the pump host 100, continue to refer to Figure 6 The connecting seat 220 is also provided with a first positioning structure, which is used to prevent the pump host 100 from falling off with the anti-falling member 170 (see Figure 2 As shown in the figure, a driving mechanism for driving the anti-dropping member 170 to move is provided in the pump main unit 100, and the driving mechanism drives the anti-dropping member 170 to move so as to lock the connecting seat 220 on the pump main unit 100, or the connecting seat 220 can also be separated from the pump main unit 100.

[0104] Specifically, the anti-dropping member 170 has a locking position or an unlocking position. When the anti-dropping member 170 is in the locking position, the connecting seat 220 is locked on the pump host 100; when the anti-dropping member 170 is in the unlocking position, the connecting seat 220 and the pump host 100 are separated. In the embodiment shown in the figure, the anti-dropping member 170 is a rotating shaft structure, and the driving mechanism drives the anti-dropping member 170 to rotate to switch the anti-dropping member 170 to the locking position or the unlocking position. It can be understood that in other embodiments, the driving mechanism can also drive the anti-dropping member 170 to translate or otherwise move to switch the anti-dropping member 170 to the locking position or the unlocking position.

[0105] For example, a driving mechanism may be provided in the pump main unit 100 to simultaneously drive the switching member 160 and the anti-dropping member 170 to move; alternatively, two driving mechanisms may be provided in the pump main unit 100 to respectively drive the switching member 160 and the anti-dropping member 170 to move, and this embodiment does not impose any restrictions on this.

[0106] Specifically, the second positioning structure can be a hole structure 22131 provided on the connection seat 220, and the anti-dropping member 170 on the pump host 100 can pass through the hole structure 22131 on the connection seat 220, and under the driving action of the pump host 100, the anti-dropping member 170 can be rotated to a locked position or an unlocked position. When the anti-dropping member 170 is in the locked position, the anti-dropping member 170 stops at the outer periphery of the hole structure 22131 to lock the connection seat 220 on the pump host 100; when the anti-dropping member 170 is in the unlocked position, the anti-dropping member 170 is located in the opening of the hole structure 22131, and the connection seat 220 is separated from the anti-dropping member 170, so that the fluid conveying mechanism 200 can be removed from the pump host 100.

[0107] Among them, combined Figure 3 and Figure 6 As shown, a positioning groove 2213 may be provided on the connection seat 220, and the positioning groove 2213 may be located between the first limiting groove 2211 and the second limiting groove 2212, and the notch of the positioning groove 2213 may be located on the side of the connection seat 220 away from the pump host 100, or in other words, the positioning groove 2213 may extend from the side of the connection seat 220 away from the pump host 100 to the other side of the connection seat 220. The hole structure 22131 may be located at the bottom of the positioning groove 2213, and the bottom of the positioning groove 2213 is located at the parts on both sides of the hole structure 22131, forming the stop surface of the anti-dropping member 170, and when the anti-dropping member 170 rotates to stop on the stop surface of the positioning groove 2213, the anti-dropping member 170 is in a locked position.

[0108] The anti-dropping member 170 on the pump main unit 100 may include a main rod 171 and a locking rod 172 (see Figure 2 As shown in FIG. 1 , the main rod 171 can be connected to the driving mechanism in the pump main unit 100, and the locking rod 172 is connected to the main rod 171. For example, the locking rod 172 is integrally formed at the top of the main rod 171, and the locking rod 172 extends to the side of the main rod 171. In this way, when the anti-dropping member 170 rotates, the locking rod 172 can rotate to stop at the peripheral side of the hole structure 22131, so that the anti-dropping member 170 is in a locked position; the locking rod 172 can also rotate to be completely located in the opening of the hole structure 22131, so that the anti-dropping member 170 is in an unlocked position.

[0109] In some examples, the middle of the locking rod 172 may be connected to the main rod 171, and the two ends of the locking rod 172 may extend to the two sides of the main rod 171, so that when the anti-dropping member 170 is rotated to the locked position, the two ends of the locking rod 172 may be stopped at the two sides of the hole structure 22131. The locking rod 172 may extend in a direction parallel to the plane where the hole structure 22131 is located, or the locking rod 172 may also have an angle with the plane where the hole structure 22131 is located. For example, the anti-dropping member 170 may be a "T-shaped" structure as a whole, and the locking rod 172 of the anti-dropping member 170 may be a "V-shaped" structure, an "inverted V-shaped" structure, a "positive trapezoidal" structure, or an "inverted trapezoidal" structure.

[0110] In other examples, one end of the locking rod 172 may be connected to the main rod 171, and the locking rod 172 may extend on one side of the main rod 171, so that when the anti-dropping member 170 rotates to the locked position, the locking rod 172 stops on one side of the hole structure 22131. Similarly, the locking rod 172 may extend in a direction parallel to the plane where the hole structure 22131 is located, or the locking rod 172 may also have an angle with the plane where the hole structure 22131 is located. For example, the anti-dropping member 170 may be an "inverted L-shaped" structure as a whole.

[0111] Continue to refer to Figure 6 As shown, in order to make the fluid delivery mechanism 200 more stably and securely installed on the pump host 100, in this embodiment, a second positioning structure can also be provided on the connecting seat 220, and a fixing structure can also be provided in the accessory installation area on the operating surface of the pump host 100 (see Figure 2 As shown), the second positioning structure of the connecting seat 220 is detachably connected to the fixed structure on the pump host 100 to connect the connecting seat 220 to the pump host 100.

[0112] As an embodiment, the second positioning structure on the connecting seat 220 can be an elastic buckle 2214 (see Figure 3 or Figure 6 ), the elastic buckle 2214 can extend out from the side wall of the main body 221 of the connecting seat 220, and correspondingly, the fixing structure on the pump host 100 can be the connecting seat 180 (see Figure 2 ), the clamping seat 180 can be erected in the accessory installation area on the operating surface of the pump host 100. Specifically, the elastic buckle 2214 is provided with at least one clamping protrusion 22141, and the clamping seat 180 is provided with at least one clamping groove 181 on the side facing the elastic buckle 2214. The clamping protrusion 22141 of the elastic buckle 2214 is clamped into the clamping groove 181 of the clamping seat 180, so as to clamp the connecting seat 220 on the pump host 100 (see Figure 1 shown).

[0113] Exemplarily, one end of the elastic buckle 2214 connected to the connection seat 220 can be close to the pump host 100, and the other end of the elastic buckle 2214 extends in a direction away from the pump host 100, so that the elastic buckle 2214 can be snapped into the clamping seat 180 on the pump host 100. In addition, there is a certain gap between the elastic buckle 2214 and the main body 221 of the connection seat 220, which reserves enough deformation space for the elastic buckle 2214. After the elastic buckle 2214 is snapped onto the clamping seat 180, the clamping seat 180 generates pressure on the elastic buckle 2214 toward the main body 221, and the elastic buckle 2214 generates an elastic force in the opposite direction and against it, and the elastic force can ensure that the elastic buckle 2214 is reliably connected to the clamping seat 180.

[0114] On this basis, refer to Figure 3 or Figure 6 As shown, the elastic buckle 2214 is further provided with a stopper 22142, which is, for example, located at one end of the elastic buckle 2214 away from the pump host 100, and the stopper 22142 extends toward the clamping seat 180 on the pump host 100, and the stopper 22142 can be stopped at the top of the clamping seat 180 (see Figure 1 In this way, it is convenient for the operator to operate. The operator can separate the elastic buckle 2214 from the clamping seat 180 by pressing the stopper 22142 of the elastic buckle 2214, so as to remove the fluid conveying mechanism 200 from the pump host 100.

[0115] Among them, the elastic buckle 2214 can be connected to the side of the connecting seat 220 away from the roller 300. Correspondingly, the clamping seat 180 on the pump main unit 100 can be set away from the roller 300 to reserve sufficient setting space for the clamping seat 180. The roller 300 and the clamping seat 180 can be respectively located on both sides of the accessory installation area on the operating surface of the pump main unit 100. The switching member 160 and the anti-falling member 170 can be set close to the clamping seat 180, and the support seat 150 can be set between the roller 300 and the switching member 160 and the anti-falling member 170, so that the layout structure in the accessory installation area is more reasonable.

[0116] In addition, in order to detect the installation status of the fluid delivery mechanism 200, in this embodiment, the pump host 100 is also provided with a detection member, and in coordination therewith, the connection seat 220 is also provided with an identification element 22151 (see Figure 4 ), the identification element 22151 cooperates with the detection member to detect the installation state of the connection seat 220. When the detection member detects that the fluid delivery mechanism 200 is installed in place, the pump host 100 can control the anti-dropping member 170 to rotate to the locking position to lock the fluid delivery mechanism 200 on the pump host 100.

[0117] For example, the connection base 220 may be provided with a mounting groove 2215 (see Figure 6 ), the installation groove 2215 can be located between the first limiting groove 2211 and the second limiting groove 2212. For example, the installation groove 2215 and the positioning groove 2213 are arranged in parallel between the first limiting groove 2211 and the second limiting groove 2212. The notch of the installation groove 2215 can face the pump host 100, or in other words, the installation groove 2215 extends from one side of the connection seat 220 facing the pump host 100 to the other side of the connection seat 220, and the identification element 22151 is installed in the installation groove 2215 (see Figure 4 ).

[0118] The detection component arranged on the pump host 100 can be a device such as a Hall sensor, an infrared sensor, an ultrasonic sensor, a photoelectric sensor or a micro switch, and the identification element 22151 installed on the connecting seat 220 can be a magnetic component, a light-shielding component or other components. The detection component detects signals such as the spacing, spacing change, position change, etc. of the identification element 22151 relative to the pump host 100, so as to monitor the in-situ status of the fluid conveying mechanism 200 in real time.

[0119] Specifically, taking the detection part on the pump host 100 as a Hall sensor and the identification element 22151 on the connecting seat 220 as a magnetic part as an example, the Hall sensor can detect the magnetic pole direction and magnetic field strength of the magnetic part to identify the model of the fluid conveying mechanism 200 and confirm whether the fluid conveying mechanism 200 is installed in place.

[0120] Take the example of the conveying component 210 including the first liquid inlet pipe 2121 and the second liquid inlet pipe 2122, and the valve mechanism 211 having the first inlet a and the second inlet b, and specifically take the example of the reversing groove 21121 on the valve core 2112 switching between the first open position, the second open position and the closed position at an angle of 60°, that is, the rotation angle of the valve core 2112 switching between the first open position and the second open position, the rotation angle switching between the first open position and the closed position, and the rotation angle switching between the second open position and the closed position are all 60°, for explanation.

[0121] Of course, the rotation angle of the reversing groove 21121 on the valve core 2112 between the first open position, the second open position and the closed position can also be other angle values, and the angle values ​​for switching between different positions can also be inconsistent, which is not limited in this embodiment. It is only necessary to design the control system of the pump host 100 to ensure that the driving mechanism can drive the switching member 160 to rotate to the corresponding position.

[0122] Before the fluid delivery mechanism 200 is installed on the pump main unit 100, the valve core 2112 of the valve mechanism 211 on the delivery assembly 210 is in a closed position, and the orientation of the switching member 160 on the pump main unit 100 is consistent with the orientation of the reversing groove 21121 when the valve core 2112 is in the closed position, for example, the switching member 160 on the pump main unit 100 is horizontally placed. The anti-dropping member 170 on the pump main unit 100 can be in an unlocked position, and the orientation of the anti-dropping member 170 is consistent with the orientation of the first positioning structure (hole structure 22131) on the connecting seat 220, for example, the anti-dropping member 170 is also horizontally placed.

[0123] When the fluid delivery mechanism 200 is installed on the pump host 100, the switching member 160 on the pump host 100 extends into the reversing groove 21121 of the valve mechanism 211 on the delivery assembly 210, and the anti-dropping member 170 on the pump host 100 passes through the hole structure 22131 and is completely located in the opening of the hole structure 22131, the elastic buckle 2214 on the connecting seat 220 is connected with the connecting seat 180 on the pump host 100, and the connecting pipe 214 of the delivery assembly 210 is wound around the roller 300. The detection member in the pump host 100 detects the signal of the identification element 22151 on the connecting seat 220 to determine the model of the fluid delivery mechanism 200 and whether the fluid delivery mechanism 200 is installed in place.

[0124] After confirming that the fluid conveying mechanism 200 is installed in place, the control system of the pump host 100 controls the driving mechanism to work, and the driving mechanism connected to the switching member 160 drives the switching member 160 to rotate 60° clockwise or counterclockwise according to the instruction, so as to connect the first liquid inlet pipe 2121 with the liquid outlet pipe 213, or connect the second liquid inlet pipe 2122 with the liquid outlet pipe 213. When the driving mechanism drives the switching member 160 to rotate 60°, the switching member 160 drives the anti-dropping member 170 to rotate 90° in the same direction (or in the opposite direction), or the anti-dropping member 170 is driven by an independent driving mechanism (connected to the anti-dropping member 170) to rotate 90° in the same direction (or in the opposite direction), and the anti-dropping member 170 rotates to a position perpendicular to the hole structure 22131 on the connecting seat 220, so as to lock the fluid conveying mechanism 200 on the pump host 100.

[0125] It should be noted that before the driving device in the pump main unit 100 drives the roller 300 to rotate, the roller 300 squeezes the connecting pipe 214 of the conveying component 210 to block the flow path in the conveying component 210. Therefore, even if the valve mechanism 211 is in a state of connecting the first liquid inlet pipe 2121 (the second liquid inlet pipe 2122) and the liquid outlet pipe 213, no free flow will be generated in the conveying component 210.

[0126] When the fluid conveying mechanism 200 needs to be removed, the driving mechanism drives the switching member 160 to rotate back to the horizontal horizontal state, and the anti-dropping member 170 is driven by the switching member 160, or the anti-dropping member 170 is driven by an independent driving mechanism and also rotates back to the horizontal horizontal state. The anti-dropping member 170 is completely located in the opening of the hole structure 22131. After the elastic buckle 2214 of the connecting seat 220 is detached from the clamping seat 180 of the pump main unit 100, the fluid conveying mechanism 200 can be removed from the pump main unit 100.

[0127] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0128] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A fluid delivery mechanism, characterized in that: It comprises a conveying component and a connecting seat. The conveying component comprises a flow passage and a valve mechanism arranged on the flow passage. The conveying component is installed on the connecting seat.

2. The fluid delivery mechanism according to claim 1, characterized in that: The valve mechanism comprises a valve housing and a valve core movably connected to the valve housing, wherein the valve housing comprises an outlet and at least one inlet; The valve core is movable between at least two positions, including an open position connecting the at least one inlet and the outlet, and a closed position blocking the at least one inlet and the outlet.

3. The fluid delivery mechanism according to claim 2, characterized in that: The valve core is provided with a reversing groove.

4. The fluid delivery mechanism according to claim 2, characterized in that: The delivery assembly further includes a liquid outlet pipe and at least one liquid inlet pipe, each of the liquid inlet pipes is connected to a corresponding inlet of the valve mechanism, and the liquid outlet pipe is connected to an outlet of the valve mechanism.

5. The fluid delivery mechanism according to claim 1, characterized in that: The connecting seat is provided with a first locking structure, and the valve mechanism is detachably connected to the first locking structure.

6. The fluid delivery mechanism according to claim 1, characterized in that: The conveying assembly also includes a pipe joint, which is arranged on the flow passage; a second locking structure is arranged on the connecting seat, and the pipe joint is detachably connected to the second locking structure.

7. The fluid delivery mechanism according to claim 1, characterized in that: The connecting seat is also provided with a first positioning structure and / or a second positioning structure.

8. The fluid delivery mechanism according to claim 1, characterized in that: The connecting seat is also provided with an identification element.

9. A nutrition pump, characterized in that: It comprises a pump main unit and the fluid delivery mechanism according to any one of claims 1 to 8, wherein the fluid delivery mechanism is detachably connected to the pump main unit.

10. The nutrition pump according to claim 9, characterized in that: The pump host is provided with a switching member, which extends into the reversing groove of the valve core of the valve mechanism to drive the valve core to move.

11. The nutrition pump according to claim 9, characterized in that: The pump host is provided with an anti-dropping member, and the anti-dropping member can be moved to a locked position or an unlocked position; When the anti-dropping member is located at the locking position, the anti-dropping member is connected to the connecting seat; when the anti-dropping member is located at the unlocking position, the anti-dropping member is disengaged from the connecting seat.

12. The nutrition pump according to claim 9, characterized in that: The pump host is provided with a fixing structure, and the fixing structure is detachably connected to the second positioning structure of the connecting seat.

13. The nutrition pump according to claim 9, characterized in that: The pump host is provided with a detection member to detect the installation status of the connecting seat.

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