Nutrition pump

Abstract

The invention provides a nutrition pump. The nutrition pump comprises a pump main machine, and a first driving mechanism, a switching piece and an anti-falling piece which are arranged on the pump main machine, the first driving mechanism is connected with the switching piece and drives the switching piece to move between at least two positions; the first driving mechanism is connected with the anti-falling piece and drives the anti-falling piece to move between at least two positions. According to the nutrition pump, the fluid conveying mechanism can be locked on the pump main machine, the fluid conveying mechanism can be prevented from falling off abnormally, and the free flow phenomenon is prevented.

Description

Technical Field

[0001] The present application relates to the technical field of medical equipment, and in particular to 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 component. The infusion component is assembled on the nutrition pump host. Nutrient solution, cleaning fluid and other fluids are passed into the infusion component. The nutrition pump host provides driving force for the infusion component to push the fluid in the infusion component forward, so as to deliver the nutrient solution, cleaning fluid and other fluids to the patient through the nasogastric tube.

[0004] However, in the existing nutrition pump, the connection between the infusion component and the nutrition pump host is not secure, and there is a risk of the infusion component 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 nutrition pump, which can lock the fluid delivery mechanism on the pump host, thereby preventing the fluid delivery mechanism from falling off abnormally and preventing the free flow phenomenon from occurring.

[0006] The present application provides a nutrition pump, comprising a pump main unit, and a first driving mechanism, a switching member and an anti-dropping member arranged on the pump main unit;

[0007] The first driving mechanism is connected to the switching member and drives the switching member to move between at least two positions; the first driving mechanism is connected to the anti-dropping member and drives the anti-dropping member to move between at least two positions.

[0008] In a possible implementation, the first driving mechanism includes a first driving member, and the first driving member drives the switching member and the anti-dropping member to move simultaneously.

[0009] In a possible implementation, the first driving mechanism further includes a first transmission assembly, the first transmission assembly is transmission-connected to the first driving member, and the switching member and the anti-dropping member are respectively connected to an output end of the first transmission assembly.

[0010] In a possible implementation, the first transmission assembly includes a first transmission member and a second transmission member, the switching member is connected to an output end of the first transmission member, and the anti-dropping member is connected to an output end of the second transmission member.

[0011] In a possible implementation, the first transmission member is a gear or rack structure; the second transmission member is a gear or rack structure.

[0012] In a possible implementation, the first driving mechanism further includes a worm structure, the worm structure is drivingly connected to the first driving member, and the first transmission member and the second transmission member are both meshed with the worm structure;

[0013] Alternatively, one of the first transmission member and the second transmission member is meshed with the worm structure, and the first transmission member is meshed with the second transmission member.

[0014] In a possible implementation, the first driving mechanism further includes a reducer, and the first driving member is connected to the worm structure via the reducer.

[0015] In a possible implementation, the first driving mechanism includes two first driving members, one of which is connected to the switching member, and the other of which is connected to the anti-dropping member.

[0016] In a possible implementation manner, a second driving mechanism is further provided on the pump main unit, and the second driving mechanism is configured to drive the pump wheel to rotate.

[0017] In a possible implementation manner, the second driving mechanism includes a second driving member and a second transmission assembly that are transmission-connected, and an output end of the second transmission assembly extends out of the pump main unit.

[0018] In a possible implementation manner, the nutrient pump further includes a pump wheel connected to an output end of the second transmission assembly.

[0019] In a possible implementation, the nutrition pump further includes a fluid delivery mechanism, which is detachably connected to the pump host;

[0020] The fluid conveying mechanism comprises a connected control valve and a connecting seat, the switching member is configured to switch the conducting state of the control valve, and the anti-dropping member is configured to be detachably connected to the connecting seat.

[0021] In a possible implementation manner, the at least two positions of the switching member include a connecting position and a disconnecting position, and the at least two positions of the anti-dropping member include a locking position and an unlocking position;

[0022] When the switching member is located at the connecting position, the anti-dropping member is located at the locking position; when the switching member is located at the disconnecting position, the anti-dropping member is located at the unlocking position.

[0023] The nutrition pump provided by the present application includes a pump main unit. A first driving mechanism, a switching member and an anti-dropping member are arranged on the pump main unit. The switching member and the anti-dropping member are both connected to the first driving mechanism. The first driving mechanism can drive the switching member to move between at least two positions, and can also drive the anti-dropping member to move between at least two positions. By moving the switching member between different positions, the on-off state of the fluid passage in the fluid conveying mechanism can be changed. By moving the anti-dropping member between different positions, the fluid conveying mechanism can be locked on the pump main unit, or the fluid conveying mechanism can be separated from the pump main unit. In this way, the fluid conveying mechanism can be prevented from abnormally falling off from the pump main unit, and the free flow phenomenon of the fluid conveying mechanism can be prevented, thereby avoiding harm to the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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.

[0025] Figure 1 for Figure 1 A schematic diagram of the structure of a nutrition pump provided in an embodiment of the present application;

[0026] Figure 2 for Figure 1 A schematic diagram of the structure of the nutrient pump after removing the fluid delivery mechanism;

[0027] Figure 3 A structural schematic diagram of a fluid delivery mechanism provided in an embodiment of the present application from one perspective;

[0028] Figure 4 for Figure 3 A structural schematic diagram of the fluid conveying mechanism from another perspective;

[0029] Figure 5 A schematic diagram of the structure of a conveying assembly provided in an embodiment of the present application;

[0030] Figure 6 A schematic diagram of the structure of a first driving mechanism provided in an embodiment of the present application;

[0031] Figure 7 A schematic structural diagram of a second driving mechanism provided in an embodiment of the present application.

[0032] Description of reference numerals:

[0033] 1- Nutrition pump;

[0034] 100-pump host; 200-fluid delivery mechanism; 300-pump wheel; 400-pump door; 500-first drive mechanism; 600-second drive mechanism;

[0035] 110-support pad; 120-display screen; 130-button; 140-indicator light; 150-support seat; 160-anti-dropping member; 170-clamping seat; 180-switching member; 210-transmission assembly; 220-connecting seat; 510-first driving member; 520-reducer; 530-first transmission assembly; 540-worm structure; 610-second driving member; 620-second transmission assembly; 630-transmission worm;

[0036] 151-accommodating groove; 171-card slot; 211-control valve; 212-liquid inlet pipe; 213-liquid outlet pipe; 214-connecting pipe; 215-pipe joint; 221-anti-drop hole; 222-elastic buckle; 223-limiting groove; 531-first transmission member; 532-second transmission member; 621-first gear; 622-second gear; 623-third gear;

[0037] 2101- buckle; 2111- valve housing; 2112- valve core; 2121- first liquid inlet pipe; 2122- second liquid inlet pipe; 2221- clamping convex; 2231- bayonet;

[0038] 21111-inlet; 21112-outlet; 21121-reversing slot;

[0039] a-first entrance; b-second entrance. DETAILED DESCRIPTION

[0040] 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.

[0041] 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.

[0042] 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.

[0043] In view of this, an embodiment of the present application provides a nutrition pump, which includes a pump main unit. By arranging a first driving mechanism, a switching member and an anti-dropping member on the pump main unit, the switching member and the anti-dropping member are both connected to the first driving mechanism, and the first driving mechanism can drive the switching member to move between at least two positions, and can also drive the anti-dropping member to move between at least two positions. By moving the switching member between different positions, the on-off state of the fluid passage in the fluid conveying mechanism can be changed, and by moving the anti-dropping member between different positions, the fluid conveying mechanism can be locked on the pump main unit, or the fluid conveying mechanism can be separated from the pump main unit. In this way, the fluid conveying mechanism can be prevented from abnormally falling off from the pump main unit, and the free flow phenomenon of the fluid conveying mechanism can be prevented, thereby avoiding harm to the patient.

[0044] 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.

[0045] 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.

[0046] 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 pump wheel 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 pump wheel 300 are detachably installed on the pump main unit 100, and the pump door 400 is movably connected to the pump main unit 100.

[0047] 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 pump wheel 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.

[0048] 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.

[0049] 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.

[0050] 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 around the display screen 120. The display screen 120 is used to display operating parameters, function options and other information of the nutrient pump 1. The buttons 130 may include an on / off button, a return button, etc. The indicator lights 140 may include an operating indicator light, an alarm indicator light, etc.

[0051] The aforementioned fluid delivery mechanism 200 and pump wheel 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.

[0052] Combination Figure 1 and Figure 2 As shown, the pipeline of the fluid delivery mechanism 200 can be arranged around the outer circumference of the pump wheel 300, and the pump wheel 300 generates a certain pressure on the pipeline of the fluid delivery mechanism 200, so that the pipeline of the fluid delivery mechanism 200 is in a stretched state. Among them, the pump host 100 can drive the pump wheel 300 to rotate, for example, the pump host 100 drives the pump wheel 300 to rotate continuously or periodically.

[0053] When the pump wheel 300 rotates continuously or periodically intermittently, the pump wheel 300 applies a continuous or periodic squeezing force to the pipeline of the fluid delivery mechanism 200, generates a continuous or periodic driving force on the fluid in the pipeline, and pushes the fluid in the pipeline to flow along the pipeline, so as to deliver the nutrients in the fluid delivery mechanism 200 to the patient; when the pump wheel 300 stops rotating, the pipeline of the fluid delivery mechanism 200 is subjected to a greater pressure from the pump wheel 300, the fluid passage in the pipeline is equivalent to being blocked, the fluid in the pipeline stops flowing forward, and the nutrition pump 1 stops delivering nutrients to the patient.

[0054] 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 pump impeller 300.

[0055] 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.

[0056] 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 fluid passage is formed inside the delivery assembly 210 for fluid to pass through, so as 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.

[0057] 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.

[0058] Furthermore, for the conveying component 210 formed by the soft rubber tube, the connecting seat 220 provides protection for the soft rubber tube, can enhance the structural strength of the fluid conveying mechanism 200, and can also support and position the conveying component 210, which helps the conveying component 210 maintain a certain shape structure, facilitates the pipeline of the conveying component 210 to be installed on the pump wheel 300, and helps the conveying component 210 to remain connected to the pump wheel 300 to prevent the pipeline of the conveying component 210 from detaching from the pump wheel 300.

[0059] As for the connection method between the connection base 220 and the pump host 100, continue to refer to Figure 3 or Figure 4 The pump main unit 100 has an anti-dropping member 160 disposed in the accessory installation area on the operating surface thereof (see Figure 2 As shown), correspondingly, the fluid conveying mechanism 200 is provided with an anti-drop structure, and the anti-drop structure cooperates with the anti-drop member 160 to lock the connecting seat 220 on the pump host 100, or the connecting seat 220 and the pump host 100 can also be separated.

[0060] Specifically, the anti-drop structure can be an anti-drop hole 221 provided on the connection seat 220, and the anti-drop member 160 passes through the anti-drop hole 221. The anti-drop member 160 can move under the drive of the pump host 100 to change the relative position relationship between the anti-drop member 160 and the anti-drop hole 221, thereby locking the fluid conveying mechanism 200 on the pump host 100, or separating the fluid conveying mechanism 200 from the pump host 100.

[0061] Specifically, under the drive of the pump main unit 100, the anti-dropping member 160 can move between at least two positions, and the at least two positions include a locked position and an unlocked position. When the anti-dropping member 160 is in the locked position, the anti-dropping member 160 stops at the periphery of the anti-dropping hole 221 to lock the connection seat 220 on the pump main unit 100; when the anti-dropping member 160 is in the unlocked position, the anti-dropping member 160 is located in the opening of the anti-dropping hole 221, and the connection seat 220 is separated from the anti-dropping member 160, so that the fluid conveying mechanism 200 can be removed from the pump main unit 100.

[0062] In actual application, before the fluid delivery mechanism 200 is assembled to the pump host 100, the anti-dropping member 160 on the pump host 100 can be in the unlocked position, and the anti-dropping member 160 can correspond to the opening of the anti-dropping hole 221; when the fluid delivery mechanism 200 is installed to the pump host 100, the anti-dropping member 160 on the pump host 100 passes through the anti-dropping hole 221 on the connecting seat 220; after the fluid delivery mechanism 200 is installed in place, the pump host 100 drives the anti-dropping member 160 to unlock the pump host 100. 0 moves from the unlocking position to the locking position, the anti-dropping member 160 stops at the periphery of the anti-dropping hole 221, and the connecting seat 220 is locked on the pump host 100; when the fluid conveying mechanism 200 needs to be removed, the pump host 100 drives the anti-dropping member 160 to move from the locking position to the unlocking position, the anti-dropping member 160 is completely located in the opening of the anti-dropping hole 221, the connecting seat 220 is separated from the anti-dropping member 160, and the fluid conveying mechanism 200 can be removed from the pump host 100.

[0063] In the embodiment shown in the figure, the anti-dropping member 160 is a rotating shaft structure, and the pump host 100 drives the anti-dropping member 160 to rotate to achieve the switching of the anti-dropping member 160 between the locked position and the unlocked position. It can be understood that in other embodiments, the pump host 100 can also drive the anti-dropping member 160 to translate or otherwise move to switch the anti-dropping member 160 to the locked position or the unlocked position.

[0064] Continue to refer to Figure 3 or Figure 4 As shown, in order to make the fluid delivery mechanism 200 more stably and securely installed on the pump host 100, in this embodiment, the fluid delivery mechanism 200 can also be provided with an elastic buckle 222, and correspondingly, the pump host 100 can be provided with a clamping seat 170 (see Figure 2 ), the clamping seat 170 can be erected in the accessory installation area on the operating surface of the pump main unit 100. The elastic clamp 222 is provided with at least one clamping protrusion 2221, and the clamping seat 170 is provided with at least one clamping groove 171 on the side facing the elastic clamp 222. The clamping protrusion 2221 of the elastic clamp 222 is clamped into the clamping groove 171 of the clamping seat 170 to clamp the fluid conveying mechanism 200 on the pump main unit 100 (see Figure 1 shown).

[0065] Figure 5 This is a schematic diagram of the structure of the conveying assembly provided in the embodiment of the present application. Figure 5As shown, a control valve 211 is provided on the conveying component 210. The control valve 211 is provided on the fluid passage of the conveying component 210. The control valve 211 can be controlled by the pump host 100 to move to change the connection state of the fluid passage in the conveying component 210. For example, the control valve 211 can be in a state of connecting the fluid passage, or in a state of cutting off the fluid passage. When the conveying component 210 has more than two fluid passages, the control valve 211 can also switch between different fluid passages.

[0066] In this way, on the basis of fixing the delivery assembly 210 to the pump main unit 100 through the connection seat 220, the control valve 211 can also prevent the free flow of the fluid in the delivery assembly 210. For example, when the delivery assembly 210 is detached from the pump main unit 100, the control valve 211 can be rotated to cut off all fluid passages in the delivery assembly 210 to stop 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.

[0067] Continue to refer to Figure 5 As shown, the conveying component 210 includes at least one liquid inlet pipe 212 and a liquid outlet pipe 213, the control valve 211 is connected between each liquid inlet pipe 212 and the liquid outlet pipe 213, the control valve 211 has at least one inlet 21111 and an outlet 21112, each inlet 21111 of the control valve 211 is connected to each liquid inlet pipe 212, and the outlet 21112 of the control valve 211 is connected to the liquid outlet pipe 213; in other words, each liquid inlet pipe 212 of the conveying component 210 is respectively connected to the corresponding inlet 21111 of the control valve 211, and the liquid outlet pipe 213 of the conveying component 210 is connected to the outlet 21112 of the control valve 211.

[0068] In this embodiment, the conveying component 210 may also include a connecting pipe 214, which is connected between the control valve 211 and the liquid outlet pipe 213. One end of the connecting pipe 214 is connected to the outlet 21112 of the control valve 211, and the other end of the connecting pipe 214 is connected to the liquid outlet pipe 213 through a pipe joint 215. The liquid outlet pipe 213 is connected to the outlet 21112 of the control valve 211 through the connecting pipe 214.

[0069] The conveying assembly 210 can be wound around the outer periphery of the pump wheel 300 by using the connecting pipe 214. The conveying assembly 210 as a whole can be bent in a "U-shaped" shape, and the control valve 211 and the pipe joint 215 are respectively located on both sides of the conveying assembly 210. The conveying assembly 210 can be fixed on the connecting seat 220 by using the control valve 211 and the pipe joint 215, so that both sides of the conveying assembly 210 are fixed, and it can be ensured that the conveying assembly 210 is stably and reliably fixed on the connecting seat 220.

[0070] Furthermore, when the delivery assembly 210 is arranged around the outer periphery of the pump wheel 300, the support seat 150 installed on the pump main body 100 can be used to guide and limit the connection pipe 214. For example, two accommodating grooves 151 can be provided on the support seat 150, and the connection pipes 214 located on both sides of the pump wheel 300 extend into the two accommodating grooves 151 respectively (see Figure 1 shown).

[0071] As for the fixing method of the conveying assembly 210 on the connecting seat 220, Figure 4 and Figure 5 As shown, as an embodiment, two limit grooves 223 can be opened on the connecting seat 220. The two limit grooves 223 can be located on both sides of the connecting seat 220, and the control valve 211 of the conveying component 210 and the pipe joint 215 are located in the limit grooves 223 on both sides.

[0072] Exemplarily, the groove walls on both sides of the limiting groove 223 can be provided with a snap-in 2231, and the outer walls on both sides of the control valve 211 and the pipe joint 215 are provided with a snap-in 2101. The snap-in 2101 on the control valve 211 and the snap-in 2101 on the pipe joint 215 are respectively snap-into the snap-in 2231 of the corresponding limiting groove 223 to snap the conveying component 210 onto the connecting seat 220.

[0073] As for the specific structure of the control valve 211, continue to refer to Figure 5 The control valve 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 move in the valve housing 2111. The buckle 2101 on the control valve 211 can be located on the outer side wall of the valve housing 2111.

[0074] Each inlet 21111 and outlet 21112 of the control valve 211 is disposed on the valve housing 2111, or in other words, at least one inlet 21111 and outlet 21112 are disposed on the valve housing 2111, and each inlet 21111 and outlet 21112 on the valve housing 2111 is communicated with a cavity in the valve housing 2111. A fluid passage is formed inside the control valve 211, and as the valve core 2112 moves in the valve housing 2111, the position of the inlet 21111 on the valve housing 2111 relative to the fluid passage changes, and the position of the outlet 21112 on the valve housing 2111 relative to the fluid passage may also change, so as to change the communication state of the control valve 211.

[0075] Driven by the pump main unit 100, the valve core 2112 can move between at least two positions, including at least one connecting position and a shutoff position. When the valve core 2112 is in the connecting 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 connecting position, the valve core 2112 allows fluid to flow from an inlet 21111 of the valve housing 2111 to the outlet 21112. When the valve core 2112 is in the shutoff 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 shutoff position, the valve core 2112 prevents fluid from flowing from any inlet 21111 of the valve housing 2111 to the outlet 21112.

[0076] 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.

[0077] Correspondingly, two inlets 21111 are provided on the valve housing 2111 of the control valve 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.

[0078] In this regard, the valve core 2112 may have two communication positions, which are a first communication position and a second communication position. When the valve core 2112 is located at the first communication 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 located at the second communication 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.

[0079] 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. In this case, the valve core 2112 may have only one communication position, and when the valve core 2112 is in the communication position, the liquid inlet pipe 212 is connected to the liquid outlet pipe 213.

[0080] Of course, the delivery component 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 component 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 communication positions. When the valve core 2112 is located at different communication 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.

[0081] As for the specific method of driving the valve core 2112 of the control valve 211 by the pump host 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. Correspondingly, a switching member 180 is provided on the pump main unit 100, and the size and shape of the switching member 180 and the reversing groove 21121 match, and the switching member 180 extends into the reversing groove 21121 of the valve core 2112, driving the valve core 2112 to move, so as to realize the switching of the valve core 2112 between different positions.

[0082] In some embodiments, when the valve core 2112 is in the cut-off position, the extension direction of the reversing groove 21121 is staggered with the center line of the outlet 21112. It should be noted that the staggered arrangement here means that the extension direction of the reversing groove 21121 is not parallel to the center line of the outlet 21112. In other words, when the valve core 2112 is in the cut-off position, the channel of the reversing groove 21121 is not aligned with the outlet 21112. For example, when the valve core 2112 is in the cut-off position, the extension direction of the reversing groove 21121 can be perpendicular to the center line of 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.

[0083] In the embodiment shown in the figure, the switching member 180 is a rotating shaft structure, and the pump host 100 drives the switching member 180 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 180 to translate or make other movements to achieve the switching between different positions of the valve core 2112.

[0084] Figure 6 This is a schematic diagram of the structure of a first driving mechanism provided in an embodiment of the present application. Figure 6 As shown, in order to drive the switching member 180 and the anti-dropping member 160 to move, in this embodiment, a first driving mechanism 500 is also provided on the pump main unit 100. The first driving mechanism 500 can be installed in the pump main unit 100, and the switching member 180 and the anti-dropping member 160 are driven to move by the first driving mechanism 500.

[0085] Among them, the switching member 180 is connected to the first driving mechanism 500, and the first driving mechanism 500 can drive the switching member 180 to move between at least two positions. Correspondingly, the switching member 180 can drive the valve core 2112 to move between at least two positions, so that the valve core 2112 can move to a connecting position or a cutting-off position.

[0086] Similarly, the anti-dropping member 160 is also connected to the first driving mechanism 500, and the first driving mechanism 500 can drive the anti-dropping member 160 to move between at least two positions. For example, the first driving mechanism 500 can drive the anti-dropping member 160 to move to the locking position to lock the fluid conveying mechanism 200 on the pump host 100; the first driving mechanism 500 can also drive the anti-dropping member 160 to move to the unlocking position to make the fluid conveying mechanism 200 and the pump host 100 in a detachable state.

[0087] It should be noted that when the switching member 180 is in the connecting position, the anti-dropping member 160 is in the locking position to prevent the fluid delivery mechanism from falling off during the infusion state. And when the switching member 180 is in the cutting position, the anti-dropping member 160 is in the unlocking position to facilitate the removal of the fluid delivery mechanism.

[0088] Continue to refer to Figure 6 As shown, in some embodiments, the first driving mechanism 500 may include a first driving member 510, which drives the switching member 180 and the anti-dropping member 160 to move at the same time. In this way, the cost of the first driving mechanism 500 is relatively low, which can reduce the cost of the entire nutrient pump; and, only one first driving member 510 is required to be provided in the pump host 100 as the driving force source of the switching member 180 and the anti-dropping member 160, and the first driving mechanism 500 occupies a relatively small space as a whole, which is convenient for the structural layout design in the pump host 100 and is conducive to the miniaturization of the nutrient pump.

[0089] The first driving member 510 may be a driving motor, which converts electrical energy into mechanical energy, outputs a rotation speed and a torque, and drives the switching member 180 and the anti-dropping member 160 to move. Since the rotation speed output by the driving motor is usually high and the torque is usually low, a reducer 520 may be provided to be connected to the output end of the driving motor. The reducer 520 may reduce the rotation speed and increase the torque, so as to output a suitable rotation speed and a torque, and meet the requirements for the movement of the switching member 180 and the anti-dropping member 160.

[0090] That is, the first driving mechanism 500 may further include a reducer 520, which is connected to the output end of the first driving member 510, and transmits power to the switching member 180 and the anti-dropping member 160 through the reducer 520. The following description is based on the example that the first driving mechanism 500 includes the first driving member 510 and the reducer 520.

[0091] When the first driving mechanism 500 has only one first driving member 510, and the first driving member 510 is used to simultaneously drive the switching member 180 and the anti-dropping member 160, the first driving mechanism 500 may further include a first transmission assembly 530, which is in transmission connection with the first driving member 510, and the switching member 180 and the anti-dropping member 160 are respectively connected to the output ends of the first transmission assembly 530. The first driving member 510 drives the first transmission assembly 530, and the first transmission assembly 530 drives the switching member 180 and the anti-dropping member 160 to move.

[0092] The first transmission assembly 530 includes a first transmission member 531 and a second transmission member 532, both of which are connected to the first driving member 510, the switching member 180 is connected to the output end of the first transmission member 531, and the anti-dropping member 160 is connected to the output end of the second transmission member 532. The first driving member 510 transmits power to the first transmission member 531, and the first transmission member 531 drives the switching member 180 to move; similarly, the first driving member 510 transmits power to the second transmission member 532, and the second transmission member 532 drives the anti-dropping member 160 to move.

[0093] Specifically, the first transmission member 531 may be a gear or rack structure, and the second transmission member 532 may also be a gear or rack structure. The first transmission member 531 and the second transmission member 532 may be respectively connected to the reducer 520, and the reducer 520 transmits power to the first transmission member 531 and the second transmission member 532 at the same time; or, the first transmission member 531 and the second transmission member 532 may be meshed with each other, and one of the first transmission member 531 and the second transmission member 532 is connected to the reducer 520, and the reducer 520 transmits power to the meshed transmission member, and the transmission member transmits power to the other transmission member.

[0094] In this regard, a worm structure 540 may be connected to the output end of the reducer 520, and the first transmission assembly 530 is meshed with the worm structure 540. The worm structure 540 cooperates with the first transmission assembly 530 to drive the switching member 180 and the anti-dropping member 160 to move. Exemplarily, both the first transmission member 531 and the second transmission member 532 may be meshed with the worm structure 540, or one of the first transmission member 531 and the second transmission member 532 may be meshed with the worm structure 540, and the first transmission member 531 and the second transmission member 532 may be meshed with each other.

[0095] Reference Figure 6 As shown, as an embodiment, the first transmission member 531 is a gear, the second transmission member 532 is also a gear, and the second transmission member 532 is meshed with the first transmission member 531, and the first transmission member 531 is connected to the worm structure 540. The reducer 520 transmits power to the first transmission member 531 through the worm structure 540, and the first transmission member 531 drives the switching member 180 to rotate, so as to switch the switching member 180 between different positions; at the same time, the first transmission member 531 transmits power to the second transmission member 532 meshed therewith, and the second transmission member 532 drives the anti-dropping member 160 to rotate, so as to switch the anti-dropping member 160 between the locked position and the unlocked position.

[0096] Of course, in other embodiments, when both the first transmission member 531 and the second transmission member 532 are gears, the second transmission member 532 may be meshed with the worm structure 540, the first transmission member 531 is meshed with the second transmission member 532, and the power is transmitted to the first transmission member 531 through the second transmission member 532. Alternatively, the first transmission member 531 and the second transmission member 532 may be meshed with the worm structure 540 respectively, and the worm structure 540 transmits the power to the first transmission member 531 and the second transmission member 532 at the same time.

[0097] Alternatively, the first transmission member 531 and the second transmission member 532 may both be racks, and one of the first transmission member 531 and the second transmission member 532 may be meshed with the worm structure 540, and the two may be meshed with each other; or, both the first transmission member 531 and the second transmission member 532 may be meshed with the worm structure 540, which is not limited to this embodiment.

[0098] When the first transmission member 531 and the second transmission member 532 are both racks, the worm structure 540 can drive the first transmission member 531 and the second transmission member 532 to translate. At this time, the first transmission member 531 can drive the switching member 180 to translate, so that the switching member 180 can switch between different positions; the second transmission member 532 drives the anti-dropping member 160 to translate, so that the anti-dropping member 160 can switch between the locked position and the unlocked position.

[0099] Alternatively, one of the first transmission member 531 and the second transmission member 532 may be a gear, and the other may be a rack, and the first transmission member 531 and one of the second transmission member 532 may be meshed with the worm structure 540, and the two may be meshed with each other; or both the first transmission member 531 and the second transmission member 532 may be meshed with the worm structure 540, which is not limited to the present embodiment.

[0100] When one of the first transmission member 531 and the second transmission member 532 is a gear and the other is a rack, the one of the switching member 180 and the anti-falling member 160 connected to the gear can rotate under the driving action, and the one of the switching member 180 and the anti-falling member 160 connected to the rack can translate under the driving action.

[0101] Alternatively, in other embodiments, the first transmission assembly 530 may include only one transmission member, and the switching member 180 and the anti-dropping member 160 are respectively connected to the transmission member. For example, the transmission member may be a rack structure, and both the switching member 180 and the anti-dropping member 160 are provided with a tooth structure meshing with the rack structure, and the transmission member drives the switching member 180 and the anti-dropping member 160 to move simultaneously.

[0102] The following description is made by taking the example that both the first transmission member 531 and the second transmission member 532 are gears and the two are meshed with each other.

[0103] Continue to refer to Figure 6 As shown, in actual application, in the pump main unit 100, the worm structure 540 can be arranged along the plane direction of the pump main unit 100, or in other words, the first driving member 510, the reducer 520 and the worm structure 540 as a whole can be arranged along the plane direction of the pump main unit 100, for example, the worm structure 540 is parallel to the operating surface of the pump main unit 100. The gear shaft of the first transmission member 531 and the gear shaft of the second transmission member 532 can be parallel to each other and perpendicular to the worm structure 540, so that the switching member 180 connected to the first transmission member 531 and the anti-dropping member 160 connected to the second transmission member 532 are both vertically arranged on the operating surface of the pump main unit 100.

[0104] In some embodiments, the first driving member 510 and the reducer 520 may also be arranged perpendicular to the plane direction of the pump main unit 100, for example, the output end of the reducer 520 extends vertically to the operating surface of the pump main unit 100. At this time, when the speed and torque output by the reducer 520 are appropriate, it is not necessary to connect the worm structure 540 to the output end of the reducer 520, but directly sleeve the first transmission member 531 or the second transmission member 532 on the output end of the reducer 520, and the gear shaft of the first transmission member 531 and the gear shaft of the second transmission member 532 both extend vertically to the operating surface of the pump main unit 100, and the switching member 180 and the anti-dropping member 160 may also be vertically arranged on the operating surface of the pump main unit 100.

[0105] As for the matching setting between the first transmission member 531 and the second transmission member 532 that are meshed with each other, when the rotation angle of the switching member 180 switching between different positions is consistent with the rotation angle of the anti-falling member 160 switching between the locked position and the unlocked position, the diameter of the first transmission member 531 and the diameter of the second transmission member 532 can be kept consistent, the first transmission member 531 and the second transmission member 532 rotate at the same speed, and the rotation angle of the switching member 180 is consistent with the rotation angle of the anti-falling member 160.

[0106] When the rotation angle of the switching member 180 switching between different positions is inconsistent with the rotation angle of the anti-dropping member 160 switching between the locked position and the unlocked position, the diameter of the first transmission member 531 and the diameter of the second transmission member 532 may be inconsistent. The transmission ratio of the first transmission member 531 and the second transmission member 532 can be matched and designed according to the relationship between the rotation angle required by the switching member 180 and the rotation angle required by the anti-dropping member 160, and the diameter of the first transmission member 531 and the diameter of the second transmission member 532 can be determined.

[0107] For example, when the rotation angle of the switching member 180 switching between different positions is smaller than the rotation angle of the anti-dropping member 160 switching between the locked position and the unlocked position, the diameter of the first transmission member 531 may be larger than the diameter of the second transmission member 532. On the contrary, when the rotation angle of the switching member 180 switching between different positions is larger than the rotation angle of the anti-dropping member 160 switching between the locked position and the unlocked position, the diameter of the first transmission member 531 may be smaller than the diameter of the second transmission member 532.

[0108] By designing the diameters of the first transmission member 531 and the second transmission member 532, it is ensured that when the switching member 180 is in the connecting position, the anti-dropping member 160 is in the locking position, thereby preventing the fluid delivery mechanism from falling off during the infusion state. In addition, it is ensured that when the switching member 180 is in the disconnecting position, the anti-dropping member 160 is in the unlocking position, so as to facilitate the removal of the fluid delivery mechanism.

[0109] In addition to the method of simultaneously driving the switching member 180 and the anti-dropping member 160 to move by one first driving member 510, two first driving members 510 may be provided to respectively drive the switching member 180 and the anti-dropping member 160 to move. In other words, the first driving mechanism 500 may include two first driving members 510, one of the two first driving members 510 is connected to the switching member 180 and drives the switching member 180 to move; the other of the two driving members is connected to the anti-dropping member 160 and drives the anti-dropping member 160 to move.

[0110] By setting two first driving members 510 to drive the switching member 180 and the anti-falling member 160 respectively, the driving method of the switching member 180 and the anti-falling member 160 is simpler. It is only necessary to design the respective transmission structures according to the required displacement (such as rotation angle) of the switching member 180 and the anti-falling member 160 respectively, without considering the transmission ratio design when transmission is required between the switching member 180 and the anti-falling member 160.

[0111] Similar to the aforementioned simultaneous driving of the switching member 180 and the anti-dropping member 160 by one first driving member 510, when the switching member 180 and the anti-dropping member 160 are driven respectively by two first driving members 510, the two first driving members 510 may both include a driving motor and a reducer 520. Furthermore, when the switching member 180 and the anti-dropping member 160 are both driven by gears or racks, a worm structure 540 may be connected to the output end of the reducer 520, the gear or rack connected to the switching member 180 is meshed with one of the worm structures 540, and the gear or rack connected to the anti-dropping member 160 is meshed with the other worm structure 540.

[0112] Taking the example that both the switching member 180 and the anti-dropping member 160 are driven by gears, the worm structures 540 connected to the two first driving members 510 can be arranged along the plane direction of the pump main unit 100. For example, the two worm structures 540 are parallel to the operating surface of the pump main unit 100, and the shaft structure of the gear connected to the switching member 180 and the shaft structure of the gear connected to the anti-dropping member 160 can be perpendicular to the worm structure 540, so that the switching member 180 and the anti-dropping member 160 are both vertically arranged on the operating surface of the pump main unit 100.

[0113] Alternatively, the two first driving members 510 and the reducers 520 connected thereto may also be arranged perpendicular to the plane direction of the pump main unit 100, for example, the output ends of the two reducers 520 both extend perpendicularly to the operating surface of the pump main unit 100. At this time, when the speed and torque output by the two reducers 520 are appropriate, it is not necessary to connect the worm structure 540 to the output ends of the two reducers 520, but directly connect the switching member 180 and the anti-dropping member 160 to the output ends of the corresponding reducers 520, respectively, or the switching member 180 and the anti-dropping member 160 may both be vertically arranged on the operating surface of the pump main unit 100.

[0114] Figure 7 This is a schematic diagram of the structure of a second driving mechanism provided in an embodiment of the present application. Figure 7 As shown, in order to drive the pump wheel 300 to rotate, in this embodiment, a second driving mechanism 600 is also provided on the pump main unit 100. The second driving mechanism 600 can also be installed in the pump main unit 100. The pump wheel 300 is connected to the output end of the second driving mechanism 600, and the pump wheel 300 is driven to rotate by the second driving mechanism 600.

[0115] Specifically, the second driving mechanism 600 may include a second driving member 610 and a second transmission assembly 620, the second transmission assembly 620 is in transmission connection with the second driving member 610, the output end of the second transmission assembly 620 extends out of the pump host 100, and the pump wheel 300 is connected to the output end of the second transmission assembly 620. The second driving member 610 is used to provide a driving force, and transmit the driving force to the second transmission assembly 620, so as to drive the pump wheel 300 to rotate through the second transmission assembly 620.

[0116] Illustratively, the output end of the second transmission assembly 620 can be designed as a transmission shaft structure, and the output end of the second transmission member 532 serves as the pump main shaft of the pump main unit 100. The pump wheel 300 can be mounted on the pump main shaft, and the pump main shaft rotates to drive the pump wheel 300 to rotate synchronously.

[0117] Among them, the second driving member 610 can also be a driving motor, which converts electrical energy into mechanical energy to output speed and torque, and then drives the second transmission component 620 to move. The second transmission component 620 transmits power to the pump wheel 300 to drive the pump wheel 300 to rotate.

[0118] Continue to refer to Figure 7 As shown, the second driving mechanism 600 can also drive the pump wheel 300 to rotate by gear transmission. Specifically, the second transmission assembly 620 may include a first gear 621 and a second gear 622, the first gear 621 is in transmission connection with the second driving member 610, the second gear 622 is meshed with the first gear 621, the output end of the second gear 622 is the pump main shaft, and the pump wheel 300 is sleeved on the pump main shaft.

[0119] The output speed of the driving motor as the second driving member 610 is usually high and the torque is usually small. In order to enable the pump main shaft on the second gear 622 to rotate at a suitable speed, the second transmission assembly 620 should play a role in reducing the speed and increasing the torque. For this reason, the diameter of the first gear 621 can be smaller than the diameter of the second gear 622 to reduce the speed of the pump main shaft.

[0120] Furthermore, in this embodiment, the output end of the second driving member 610 may not be provided with a reducer 520, but the second transmission assembly 620 may be directly connected to the output end of the second driving member 610. In this regard, in order to reduce the rotation speed of the second driving member 610 to a suitable rotation speed, a third gear 623 may be additionally provided, that is, the second transmission assembly 620 may further include a third gear 623, the third gear 623 may be coaxially arranged with the first gear 621, and the third gear 623 is transmission-connected to the output end of the second driving member 610.

[0121] The diameter of the third gear 623 may be greater than the diameter of the first gear 621. Thus, compared with the first gear 621 being directly connected to the output end of the second driving member 610 by transmission, the rotation speed of the gear shaft shared by the third gear 623 and the first gear 621 may be reduced by setting the third gear 623 to be connected to the output end of the second driving member 610 by transmission, and then the rotation speed of the pump main shaft on the second gear 622 may be reduced to a suitable range by transmission between the first gear 621 having a smaller diameter and the second gear 622 having a largest diameter.

[0122] Of course, if a reducer 520 is provided at the output end of the second driving member 610, there is no need to additionally set up a third gear 623 to reduce the rotation speed. The first gear 621 can be directly connected to the output end of the reducer 520 for transmission. Even, there is no need to set up the first gear 621, and the second gear 622 can be directly connected to the output end of the reducer 520 for transmission.

[0123] Continue to refer to Figure 7 Similar to the first driving mechanism 500, when the second driving member 610 is arranged along the plane direction of the pump main unit 100, a worm structure can also be connected to the output end of the second driving member 610. For the convenience of explanation, this embodiment defines the worm structure connected to the second driving member 610 as a transmission worm 630. The gear axes of each gear in the second transmission assembly 620 can be parallel to each other and are perpendicular to the transmission worm 630, so that the pump main shaft on the second gear 622 extends vertically onto the operating surface of the pump main unit 100, so that the pump wheel 300 can be connected thereto.

[0124] Alternatively, the second driving member 610 may also be arranged perpendicular to the plane direction of the pump main unit 100, for example, the output end of the second driving member 610 extends perpendicularly to the operating surface of the pump main unit 100. In this case, it is not necessary to connect the transmission worm 630 to the output end of the second driving member 610, nor to provide the third gear 623, but to directly sleeve the first gear 621 on the output end of the second driving member 610, and the pump main shaft on the second gear 622 meshing with the first gear 621 extends perpendicularly to the operating surface of the pump main unit 100, so that the pump impeller 300 can be connected thereto.

[0125] When the nutrition pump 1 is used, before the fluid delivery mechanism 200 is installed on the pump main unit 100, the valve core 2112 of the control valve 211 on the delivery assembly 210 is in the cut-off position, and the orientation of the switching member 180 on the pump main unit 100 is consistent with the orientation of the reversing groove 21121 when the valve core 2112 is in the cut-off position, for example, the switching member 180 on the pump main unit 100 is horizontally placed. The anti-dropping member 160 on the pump main unit 100 can be in the unlocked position, and the orientation of the anti-dropping member 160 is consistent with the orientation of the anti-dropping hole 221 on the connecting seat 220, for example, the anti-dropping member 160 is also horizontally placed.

[0126] When the fluid conveying mechanism 200 is installed on the pump main unit 100, the switching member 180 on the pump main unit 100 extends into the reversing groove 21121 of the control valve 211 on the conveying assembly 210, and the anti-dropping member 160 on the pump main unit 100 passes through the anti-dropping hole 221 and is completely located in the opening of the anti-dropping hole 221, the elastic buckle 222 on the connecting seat 220 is snapped with the snap-on seat 170 on the pump main unit 100, and the connecting pipe 214 of the conveying assembly 210 is wound around the pump impeller 300. The pump main unit 100 detects the identification signal of the connecting seat 220, determines the model of the fluid conveying mechanism 200 and that the fluid conveying mechanism 200 is installed in place.

[0127] The pump host 100 receives an instruction to select a certain inlet tube 212 (e.g., the first inlet tube 2121) for infusion: before starting the infusion, the first drive mechanism 500 on the pump host 100 works, the first drive member 510 operates, drives the switching member 180 and the valve core 2112 of the control valve 211 to move to a certain connection position (e.g., the first connection position), and at the same time drives the anti-dropping member 160 to move to the locking position. Afterwards, the second drive mechanism 600 is started, the second drive member 610 operates, drives the pump wheel 300 to rotate, and starts the infusion.

[0128] It should be noted that before the second driving mechanism 600 drives the pump wheel 300 to rotate, the pump wheel 300 squeezes the connecting pipe 214 of the conveying component 210 to block the fluid passage in the conveying component 210. Therefore, even if the control valve 211 is in a state of connecting a certain liquid inlet pipe 212 and a liquid outlet pipe 213, no free flow will be generated in the conveying component 210.

[0129] The pump host 100 receives an instruction to select another inlet tube 212 (e.g., the second inlet tube 2122) for infusion: before starting the infusion, the first drive mechanism 500 on the pump host 100 works, the first drive member 510 operates, drives the switching member 180 and the valve core 2112 of the control valve 211 to move to another connection position (e.g., the second connection position), and at the same time drives the anti-dropping member 160 to move to the locking position. Afterwards, the second drive mechanism 600 is started, the second drive member 610 operates, drives the pump wheel 300 to rotate, and starts the infusion.

[0130] It should be noted that when the switching member 180 drives the valve core 2112 of the control valve 211 to move between different connecting positions, the position of the anti-falling member 160 will also move. However, when the switching member 180 drives the valve core 2112 of the control valve 211 to move to any connecting position, the position of the anti-falling member 160 after movement is in the locked position.

[0131] The pump host 100 receives the instruction to stop the infusion: the second driving member 610 first stops running to stop the pump wheel 300 from rotating. Then, the first driving member 510 operates to drive the switching member 180 to move to the initial position, and the switching member 180 drives the valve core 2112 of the control valve 211 back to the cut-off position, and at the same time, drives the anti-dropping member 160 back to the initial unlocking position. At this time, the fluid delivery mechanism 200 can be removed from the pump host 100.

[0132] 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.

[0133] 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 nutrition pump, characterized in that: It includes a pump host, and a first driving mechanism, a switching member and an anti-dropping member arranged on the pump host; The first driving mechanism is connected to the switching member to drive the switching member to move between at least two positions; the first driving mechanism is connected to the anti-falling member to drive the anti-falling member to move between at least two positions.

2. The nutrition pump according to claim 1, characterized in that: The first driving mechanism includes a first driving member, and the first driving member drives the switching member and the anti-dropping member to move simultaneously.

3. The nutrition pump according to claim 2, characterized in that: The first driving mechanism further comprises a first transmission assembly, the first transmission assembly is in transmission connection with the first driving member, and the switching member and the anti-dropping member are respectively connected to an output end of the first transmission assembly.

4. The nutrition pump according to claim 3, characterized in that: The first transmission assembly includes a first transmission member and a second transmission member, the switching member is connected to the output end of the first transmission member, and the anti-dropping member is connected to the output end of the second transmission member.

5. The nutrition pump according to claim 4, characterized in that: The first transmission member is a gear or rack structure; the second transmission member is a gear or rack structure.

6. The nutrition pump according to claim 5, characterized in that: The first driving mechanism further comprises a worm structure, the worm structure is transmission-connected with the first driving member, and the first transmission member and the second transmission member are both meshed with the worm structure; Alternatively, one of the first transmission member and the second transmission member is meshed with the worm structure, and the first transmission member is meshed with the second transmission member.

7. The nutrition pump according to claim 6, characterized in that: The first driving mechanism further includes a reducer, and the first driving member is connected to the worm structure via the reducer.

8. The nutrition pump according to claim 1, characterized in that: The first driving mechanism includes two first driving members, one of which is connected to the switching member, and the other of which is connected to the anti-dropping member.

9. The nutrition pump according to claim 1, characterized in that: The pump main unit is also provided with a second driving mechanism, and the second driving mechanism is configured to drive the pump wheel to rotate.

10. The nutrition pump according to claim 9, characterized in that: The second driving mechanism includes a second driving member and a second transmission assembly in transmission connection, and an output end of the second transmission assembly extends out of the pump main unit.

11. The nutrition pump according to claim 10, characterized in that: The nutrition pump further comprises a pump wheel connected to an output end of the second transmission assembly.

12. The nutrition pump according to claim 1, characterized in that: The nutrition pump further comprises a fluid delivery mechanism, which is detachably connected to the pump host; The fluid conveying mechanism comprises a connected control valve and a connecting seat, the switching member is configured to switch the conducting state of the control valve, and the anti-dropping member is configured to be detachably connected to the connecting seat.

13. The nutrition pump according to claim 1, characterized in that: The at least two positions of the switching member include a connecting position and a disconnecting position, and the at least two positions of the anti-dropping member include a locking position and an unlocking position; When the switching member is located at the connecting position, the anti-falling member is located at the locking position; when the switching member is located at the disconnecting position, the anti-falling member is located at the unlocking position.

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