A nutritional pump

Abstract

The application provides a nutrition pump, which comprises a pump main machine, a first driving mechanism, a switching piece and an anti-falling piece 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. The nutrition pump provided by the application can lock the fluid conveying mechanism on the pump main machine, can avoid abnormal falling of the fluid conveying mechanism and can prevent the free flow phenomenon from occurring.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical equipment, in particular to a nutrition pump. BACKGROUND

[0002] The nutrition pump is a nutrition infusion pump for nasal feeding, which can input water, nutrient solution and self-made meal milk with certain concentration to patients through a nasal feeding tube to improve the nutritional status of the patients.

[0003] The nutrition pump comprises a nutrition pump host and an infusion assembly, the infusion assembly is assembled on the nutrition pump host, and fluids such as nutrient solution and cleaning solution are introduced into the infusion assembly. The nutrition pump host provides driving force for the infusion assembly to push the fluids in the infusion assembly forward, so as to deliver the fluids such as nutrient solution and cleaning solution to the patient through the nasal feeding tube.

[0004] However, in the existing nutrition pump, the infusion assembly is not firmly connected with the nutrition pump host, and there is a risk of falling off of the infusion assembly. SUMMARY

[0005] In order to solve at least one problem mentioned in the background, the present application provides a nutrition pump, which can lock the fluid delivery mechanism on the pump host, avoid abnormal falling off of the fluid delivery mechanism, and prevent the occurrence of free flow phenomenon.

[0006] The present application provides a nutrition pump, which comprises a pump host, a first driving mechanism, a switching piece and an anti-falling piece arranged on the pump host.

[0007] 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.

[0008] In one possible implementation, the first driving mechanism comprises a first driving piece, which simultaneously drives the switching piece and the anti-falling piece to move.

[0009] In one possible implementation, the first driving mechanism further comprises a first transmission assembly, the first transmission assembly is in transmission connection with the first driving piece, and the switching piece and the anti-falling piece are respectively connected to the output ends of the first transmission assembly.

[0010] In one possible implementation, the first transmission assembly comprises a first transmission piece and a second transmission piece, the switching piece is connected to the output end of the first transmission piece, and the anti-falling piece is connected to the output end of the second transmission piece.

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

[0012] In a possible implementation, the first driving mechanism further comprises a worm structure, the first driving member is in transmission connection with the worm structure, and the first transmission member and the second transmission member are in engagement with the worm structure.

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

[0014] In a possible implementation, the first driving mechanism further comprises a speed reducer, and the first driving member is connected with the worm structure through the speed reducer.

[0015] In a possible implementation, the first driving mechanism comprises two first driving members, one of the two first driving members is connected with the switching member, and the other of the two first driving members is connected with the anti-falling member.

[0016] In a possible implementation, the pump main machine is further provided with a second driving mechanism, the second driving mechanism is configured to drive the pump wheel to rotate.

[0017] In a possible implementation, the second driving mechanism comprises 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 machine.

[0018] In a possible implementation, the nutritional pump further comprises a pump wheel, the pump wheel is connected to the output end of the second transmission assembly.

[0019] In a possible implementation, the nutritional pump further comprises a fluid delivery mechanism, the fluid delivery mechanism is detachably connected to the pump main machine.

[0020] The fluid delivery mechanism comprises a control valve and a connecting seat connected with each other, the switching member is configured to switch the conduction state of the control valve, and the anti-falling member is configured to be detachably connected with the connecting seat.

[0021] In a possible implementation, the at least two positions of the switching member comprise a communication position and a cutoff position, and the at least two positions of the anti-falling member comprise a locking position and an unlocking position.

[0022] When the switching member is in the communication position, the anti-falling member is in the locking position; and when the switching member is in the cutoff position, the anti-falling member is in the unlocking position.

[0023] The nutritional pump provided in the application comprises a pump main machine, a first driving mechanism, a switching piece and an anti-falling piece are arranged on the pump main machine, the switching piece and the anti-falling piece are connected with the first driving mechanism, the first driving mechanism can drive the switching piece to move between at least two positions, and can also drive the anti-falling piece to move between at least two positions. By moving the switching piece between different positions, the on-off state of the fluid passage in the fluid delivery mechanism can be changed, and by moving the anti-falling piece between different positions, the fluid delivery mechanism can be locked on the pump main machine or separated from the pump main machine. In this way, the fluid delivery mechanism can be prevented from abnormally falling off the pump main machine, and the fluid delivery mechanism can be prevented from occurring the free flow phenomenon, so as to avoid causing harm to the patient. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application. Those skilled in the art can obtain other drawings according to these drawings without any creative effort.

[0025] Figure 1 For Figure 1 The structural schematic diagram of the nutritional pump provided in the embodiments of the application is shown in the figure;

[0026] Figure 2 For Figure 1 The structural schematic diagram of the nutritional pump provided in the embodiments of the application is shown in the figure;

[0027] Figure 3 The structural schematic diagram of the fluid delivery mechanism provided in the embodiments of the application is shown in the figure from one perspective;

[0028] Figure 4 For Figure 3 The structural schematic diagram of the fluid delivery mechanism provided in the embodiments of the application is shown in the figure from another perspective;

[0029] Figure 5 The structural schematic diagram of the delivery assembly provided in the embodiments of the application is shown in the figure;

[0030] Figure 6 The structural schematic diagram of a first driving mechanism provided in the embodiments of the application is shown in the figure;

[0031] Figure 7 The structural schematic diagram of a second driving mechanism provided in the embodiments of the application is shown in the figure.

[0032] Explanation of reference signs:

[0033] 1-nutritional pump;

[0034] 100-pump main machine; 200-fluid delivery mechanism; 300-pump wheel; 400-pump door; 500-first driving mechanism; 600-second driving mechanism;

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

[0036] 151-receiving groove; 171-clamping groove; 211-control valve; 212-liquid inlet pipe; 213-liquid outlet pipe; 214-connection pipe; 215-pipe joint; 221-anti-falling hole; 222-elastic buckle; 223-limiting groove; 531-first transmission piece; 532-second transmission piece; 621-first gear; 622-second gear; 623-third gear;

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

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

[0039] a-first inlet; b-second inlet. 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, and enteral nutrition is more conducive to the physiological nutrient metabolism and utilization of the human body, can safely and effectively promote and maintain the structure and function of the complete gastrointestinal tract, protect the gastric mucosal barrier, reduce complications and reduce treatment costs.

[0041] In clinical practice, water, nutrient solution and self-made certain concentration of meal milk are generally delivered to patients through a nutrition pump (also known as an enteral nutrition pump) to provide nutrition for patients. The nutrition pump usually includes a nutrition pump main machine and a delivery assembly assembled on the nutrition pump main machine. The nutrition pump main machine provides driving force for the delivery assembly to push the fluid in the pipeline of the delivery assembly forward to deliver the nutrient solution, cleaning solution and other fluids to the patient.

[0042] However, in the existing nutrition pump, the delivery assembly is not firmly connected with the nutrition pump main machine, and the phenomenon of abnormal falling off from the nutrition pump main machine easily occurs, which affects the normal work of the nutrition pump, and can cause the free flow phenomenon of the delivery assembly, which may cause harm to the patient.

[0043] Therefore, the embodiment of the present application provides a nutrition pump, which comprises a pump main machine. A first driving mechanism, a switching piece and an anti-falling piece are arranged on the pump main machine. The switching piece and the anti-falling piece are connected with the first driving mechanism. The first driving mechanism can drive the switching piece to move between at least two positions and can also drive the anti-falling piece to move between at least two positions. By moving the switching piece between different positions, the on-off state of the fluid passage in the fluid delivery mechanism can be changed. By moving the anti-falling piece between different positions, the fluid delivery mechanism can be locked on the pump main machine or separated from the pump main machine. In this way, the fluid delivery mechanism can be prevented from abnormally falling off the pump main machine, and the fluid delivery mechanism can be prevented from flowing freely, so that the patient is prevented from being hurt.

[0044] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0045] Figure 1 A structural schematic diagram of the nutrition pump provided by the embodiment of the present application is shown in the figure. Figure 2 A structural schematic diagram of the nutrition pump provided by the embodiment of the present application is shown in the figure. Figure 1 A structural schematic diagram of the nutrition pump provided by the embodiment of the present application is shown in the figure.

[0046] Referring to the figures shown in Figure 1 and Figure 2 , the embodiment of the present application provides a nutrition pump 1, which comprises a pump main machine 100, a fluid delivery mechanism 200, a pump wheel 300 and a pump door 400. The pump main machine 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 machine 100. The pump door 400 is movably connected to the pump main machine 100.

[0047] The side surface of the pump main machine 100 can be an operation surface. An operator can face the operation surface of the pump main machine 100 to operate the pump main machine 100. The fluid delivery mechanism 200 and the pump wheel 300 can be installed on the operation surface of the pump main machine 100. The pump door 400 can also be arranged on the operation surface of the pump main machine 100.

[0048] Exemplarily, the pump main machine 100 can be erected on a support base such as a desktop or a support frame, and the bottom surface of the pump main machine 100 can be provided with a flexible support pad 110 to avoid hard contact between the pump main machine 100 and the support base, increase the friction between the pump main machine 100 and the support base, ensure the stability of the pump main machine 100, and also slow down the abrasion or scratching of the bottom surface of the pump main machine 100. One side surface of the pump main machine 100 can be an operation surface, which can be perpendicular to the bottom surface thereof, for example.

[0049] In combination Figure 1 and Figure 2 As shown in FIGS. 1, 2 and 3, one side of the operation surface of the pump main machine 100 can be a display control area, and the other side can be an accessory mounting area. The display control area is mainly used to display the related information of the pump main machine 100, and the operator can operate in the display control area to control the running state of the pump main machine 100. The accessory mounting area is used to mount some accessories cooperating with the pump main machine 100, and these accessories and the pump main machine 100 together constitute the nutrient pump 1 to realize the function of the nutrient pump 1 for delivering nutrient substances.

[0050] The display control area can be provided with a display screen 120, a button 130 and an indicator lamp 140. The display screen 120 can occupy most of the area of the display control area, and the button 130 and the indicator lamp 140 can be arranged on the periphery of the display screen 120. The display screen 120 is used to display the running parameters and function options of the nutrient pump 1, the button 130 can include an on-off key, a back key and the like, and the indicator lamp 140 can include a running indicator lamp, an alarm indicator lamp and the like.

[0051] The foregoing fluid delivery mechanism 200 and pump wheel 300 can be mounted in the accessory mounting area, and the pump door 400 can be rotatably connected to the side wall of the pump main machine 100 and located on the side where the accessory mounting area is located. The pump door 400 can only cover the accessory mounting area to protect the accessories mounted on the accessory mounting area, and the display control area is exposed outside the pump door 400 to facilitate the operator to observe the display screen 120 and control the pump main machine 100. Exemplarily, the pump door 400 can be a transparent piece, so that the working state of the accessories in the accessory mounting area can be observed through the pump door 400 to facilitate real-time observation of the running state of the nutrient pump 1.

[0052] In combination Figure 1 and Figure 2 As shown in FIGS. 1, 2 and 3, the pipeline of the fluid delivery mechanism 200 can be arranged around the outer periphery of the pump wheel 300, and the pump wheel 300 generates a certain pressure on the pipeline of the fluid delivery mechanism 200 to make the pipeline of the fluid delivery mechanism 200 in a stretched state. The pump main machine 100 can drive the pump wheel 300 to rotate, for example, continuously or periodically and intermittently.

[0053] When the pump wheel 300 rotates continuously or intermittently, it applies continuous or periodic squeezing force to the pipeline of the fluid delivery mechanism 200, generating continuous or periodic pushing force on the fluid in the pipeline, thus driving the fluid in the pipeline to flow along the pipeline and delivering nutrients in the fluid delivery mechanism 200 to the patient. When the pump wheel 300 stops rotating, the pressure on the pipeline of the fluid delivery mechanism 200 from the pump wheel 300 is greater, and the fluid passage in the pipeline is essentially blocked. The fluid in the pipeline stops flowing forward, and the nutrition pump 1 stops delivering nutrients to the patient.

[0054] A support base 150 can also be installed in the accessory installation area on the operating surface of the pump main unit 100. The support base 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 base 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 limit 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 outer periphery of the pump wheel 300.

[0055] Figure 3 A schematic diagram of the structure of the fluid transport mechanism provided in an embodiment of this application; Figure 4 for Figure 3 A schematic diagram of the fluid transport mechanism from another perspective.

[0056] Reference Figure 3 or Figure 4 As shown, the fluid delivery mechanism 200 includes a delivery component 210 and a connecting seat 220. The delivery component 210 is the main functional component of the fluid delivery mechanism 200. The delivery component 210 has a fluid passage for fluid to pass through, delivering the aforementioned water, nutrient solution, and self-prepared, high-concentration milk-based nutrient solution, etc., to the patient. The delivery component 210 is mounted on the connecting seat 220, which is detachably connected to the pump host 100 to fix the fluid delivery mechanism 200 to the pump host 100.

[0057] By mounting the delivery assembly 210 onto the connector 220 and securing it to the pump unit 100 using the connector 220, abnormal detachment of the delivery assembly 210 from the pump unit 100 can be prevented. For example, this prevents the delivery assembly 210 from detaching from the pump unit 100 during the delivery of nutrients to the patient. This avoids disrupting the normal operation of the nutrition pump 1 due to abnormal detachment of the delivery assembly 210, and also prevents unintended gravity infusion caused by free flow of fluid within the delivery assembly 210, thus avoiding potential harm to the patient.

[0058] And, for the delivery assembly 210 formed by the connection of the soft rubber tube, the connecting seat 220 forms protection for the soft rubber tube, can enhance the structural strength of the fluid delivery mechanism 200, and can also support and position the delivery assembly 210, helping the delivery assembly 210 to maintain a certain shape configuration, facilitating the pipe of the delivery assembly 210 to be sleeved on the pump wheel 300, and facilitating the delivery assembly 210 to remain connected with the pump wheel 300, so as to prevent the pipe of the delivery assembly 210 from being separated from the pump wheel 300.

[0059] As for the connection mode of the connecting seat 220 and the pump main machine 100, continuing to refer to Figure 3 or Figure 4 , the anti-falling piece 160 (see Figure 2 ) is arranged in the accessory mounting area on the operation surface of the pump main machine 100, and the fluid delivery mechanism 200 is provided with an anti-falling structure. The anti-falling structure and the anti-falling piece 160 cooperate to lock the connecting seat 220 on the pump main machine 100, or can also separate the connecting seat 220 and the pump main machine 100.

[0060] Specifically, the anti-falling structure can be an anti-falling hole 221 formed on the connecting seat 220, and the anti-falling piece 160 passes through the anti-falling hole 221. The anti-falling piece 160 can be driven by the pump main machine 100 to move, so as to change the relative position relationship between the anti-falling piece 160 and the anti-falling hole 221, and then lock the fluid delivery mechanism 200 on the pump main machine 100, or separate the fluid delivery mechanism 200 from the pump main machine 100.

[0061] Specifically, under the drive of the pump main machine 100, the anti-falling piece 160 can move between at least two positions, including a locking position and an unlocking position. When the anti-falling piece 160 is located at the locking position, the anti-falling piece 160 is stopped at the outer periphery of the anti-falling hole 221 to lock the connecting seat 220 on the pump main machine 100; when the anti-falling piece 160 is located at the unlocking position, the anti-falling piece 160 is located in the opening of the anti-falling hole 221, and the connecting seat 220 is separated from the anti-falling piece 160, so that the fluid delivery mechanism 200 can be detached from the pump main machine 100.

[0062] In actual application, before the fluid delivery mechanism 200 is assembled to the pump main body 100, the anti-falling piece 160 on the pump main body 100 can be in the unlocking position, and the anti-falling piece 160 can be correspondingly arranged in the opening of the anti-falling hole 221; when the fluid delivery mechanism 200 is installed to the pump main body 100, the anti-falling piece 160 on the pump main body 100 passes through the anti-falling hole 221 on the connecting seat 220; after the fluid delivery mechanism 200 is installed in place, the pump main body 100 drives the anti-falling piece 160 to move from the unlocking position to the locking position, and the anti-falling piece 160 is stopped at the outer periphery of the anti-falling hole 221 to lock the connecting seat 220 on the pump main body 100; when the fluid delivery mechanism 200 needs to be removed, the pump main body 100 drives the anti-falling piece 160 to move from the locking position to the unlocking position, and the anti-falling piece 160 is completely arranged in the opening of the anti-falling hole 221, the connecting seat 220 is separated from the anti-falling piece 160, and the fluid delivery mechanism 200 can be removed from the pump main body 100.

[0063] In the embodiment shown in the figure, the anti-falling piece 160 is a rotating shaft structure, and the pump main body 100 drives the anti-falling piece 160 to rotate to realize the switching of the anti-falling piece 160 between the locking position and the unlocking position. It can be understood that in other embodiments, the pump main body 100 can also drive the anti-falling piece 160 to translate or other movements to switch the anti-falling piece 160 to the locking position or the unlocking position.

[0064] Continuing to refer to Figure 3 Or Figure 4 As shown, in order to make the fluid delivery mechanism 200 more stable and reliable to be installed on the pump main body 100, in the embodiment, the fluid delivery mechanism 200 can also be provided with an elastic buckle 222, and correspondingly, the pump main body 100 can be provided with a clamping seat 170 (see Figure 2 The elastic buckle 222 is provided with at least one clamping protrusion 2221, and the side of the clamping seat 170 facing the elastic buckle 222 is provided with at least one clamping groove 171, and the clamping protrusion 2221 of the elastic buckle 222 is clamped into the clamping groove 171 of the clamping seat 170, so as to clamp the fluid delivery mechanism 200 on the pump main body 100 (see Figure 1 As shown).

[0065] Figure 5 The structural schematic diagram of the delivery assembly provided in the embodiment of the application is shown. Referring to Figure 5As shown, the delivery assembly 210 is provided with a control valve 211, which is arranged on the fluid passage of the delivery assembly 210 and can be controlled by the pump main body 100 to change the communication state of the fluid passage in the delivery assembly 210, for example, the control valve 211 can be in a state of communicating the fluid passage or in a state of cutting off the fluid passage, and when the delivery assembly 210 has more than two fluid passages, the control valve 211 can also switch between different fluid passages.

[0066] In this way, based on the fixing of the delivery assembly 210 to the pump main body 100 through the connecting seat 220, the control valve 211 can also prevent the free flow phenomenon of the fluid in the delivery assembly 210. For example, when the delivery assembly 210 is separated from the pump main body 100, the control valve 211 can be rotated to a state of cutting off all fluid passages in the delivery assembly 210 to prevent the liquid in the delivery assembly 210 from continuing to flow and prevent the delivery assembly 210 from producing unintended gravity infusion to avoid harm to the patient.

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

[0068] In this embodiment, the delivery assembly 210 can 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, and the liquid outlet pipe 213 is in communication with the outlet 21112 of the control valve 211 through the connecting pipe 214.

[0069] The delivery assembly 210 can be arranged around the outer periphery of the pump wheel 300 by using the connecting pipe 214, and the delivery assembly 210 as a whole can be in a bent shape similar to a "U shape", and the control valve 211 and the pipe joint 215 are respectively located on both sides of the delivery assembly 210. The control valve 211 and the pipe joint 215 can be used to fix the delivery assembly 210 on the connecting seat 220 to fix both sides of the delivery assembly 210, which can ensure that the delivery assembly 210 is stably and reliably fixed on the connecting seat 220.

[0070] And, when the conveying assembly 210 is arranged around the outer periphery of the pump wheel 300, the support seat 150 installed on the pump main machine 100 can be used to guide and limit the connecting pipe 214, for example, two accommodating grooves 151 can be arranged on the support seat 150, and the connecting pipes 214 on both sides of the pump wheel 300 respectively extend into the two accommodating grooves 151 (see Figure 1 .

[0071] As for the fixing mode of the conveying assembly 210 on the connecting seat 220, as shown in Figure 4 and Figure 5 , as an embodiment, two limiting grooves 223 can be arranged on the connecting seat 220, for example, the two limiting grooves 223 can be respectively arranged on both sides of the connecting seat 220, and the part where the control valve 211 of the conveying assembly 210 is located and the part where the pipe joint 215 is located are respectively arranged in the two side limiting grooves 223.

[0072] For example, the two side walls of the limiting groove 223 can be provided with a clamping hole 2231, and the two side outer walls of the control valve 211 and the pipe joint 215 are respectively provided with a buckle 2101, and the buckle 2101 on the control valve 211 and the buckle 2101 on the pipe joint 215 are respectively clamped in the clamping hole 2231 of the corresponding limiting groove 223, so as to clamp the conveying assembly 210 on 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 shell 2111 and a valve core 2112, the valve shell 2111 has a cavity, the valve core 2112 is installed in the cavity of the valve shell 2111, and the valve core 2112 is movable in the valve shell 2111. The buckle 2101 on the control valve 211 can be located on the outer wall of the valve shell 2111.

[0074] Each inlet 21111 and outlet 21112 of the control valve 211 is arranged on the valve shell 2111, or in other words, at least one inlet 21111 and outlet 21112 is arranged on the valve shell 2111, and each inlet 21111 and outlet 21112 on the valve shell 2111 is in communication with the cavity in the valve shell 2111. The control valve 211 forms a fluid passage inside, and as the valve core 2112 moves in the valve shell 2111, the orientation of the inlet 21111 on the valve shell 2111 relative to the fluid passage changes, and the orientation of the outlet 21112 on the valve shell 2111 relative to the fluid passage can also change, so as to change the communication state of the control valve 211.

[0075] Under the driving of the pump main machine 100, the valve core 2112 can move between at least two positions, including at least one communication position and a cutoff position. Among them, when the valve core 2112 is located in the communication position, the valve core 2112 can communicate one inlet 21111 of the valve housing 2111 with the outlet 21112; or in other words, when the valve core 2112 is located in the communication position, the valve core 2112 allows the fluid to flow from one inlet 21111 of the valve housing 2111 to the outlet 21112. When the valve core 2112 is located in the cutoff position, the valve core 2112 does not communicate any inlet 21111 of the valve housing 2111 with the outlet 21112; or in other words, when the valve core 2112 is located in the cutoff position, the valve core 2112 prevents the fluid from flowing from any inlet 21111 of the valve housing 2111 to the outlet 21112.

[0076] Continuing to refer to Figure 5 As shown, the delivery assembly 210 includes two liquid inlet pipes 212, which can be used to deliver different fluids, in other words, the fluids contained in the liquid storage devices connected to the inlets of the two liquid inlet pipes 212 can be different. For ease of illustration, the two liquid inlet pipes 212 of the delivery assembly 210 are defined as a first liquid inlet pipe 2121 and a second liquid inlet pipe 2122 in this embodiment, and the fluid delivered by the first liquid inlet pipe 2121 is taken as an example of nutrient solution, and the fluid delivered by the second liquid inlet pipe 2122 is taken as an example of cleaning solution (such as normal saline or pure water) for illustration.

[0077] Correspondingly, the valve housing 2111 of the control valve 211 is provided with two inlets 21111, and for ease of illustration, the two inlets 21111 of the valve housing 2111 are defined as a first inlet a and a second inlet b in this embodiment, the first liquid inlet pipe 2121 of the delivery assembly 210 is connected to the first inlet a of the valve housing 2111, and the second liquid inlet pipe 2122 of the delivery assembly 210 is connected to the second inlet b of the valve housing 2111.

[0078] For this purpose, the valve core 2112 can have two communication positions, which are a first communication position and a second communication position, respectively. When the valve core 2112 is located in the first communication position, the first liquid inlet pipe 2121 is communicated with 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 in the second communication position, the second liquid inlet pipe 2122 is communicated with 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 assembly 210.

[0079] In addition to the delivery assembly 210 shown in the figure including two inlet pipes 212, in other embodiments, the delivery assembly 210 may also include only one inlet pipe 212, which can be used to deliver nutrient solution or cleaning solution. In this case, the valve core 2112 may have only one connected position. When the valve core 2112 is in the connected position, the inlet pipe 212 is connected to the outlet pipe 213.

[0080] Of course, the conveying assembly 210 may also include three or more inlet pipes 212, with different inlet pipes 212 used to convey different fluids. Taking the conveying assembly 210 as an example, which includes three inlet pipes 212, these three inlet pipes 212 can be used to convey the first nutrient solution, the second nutrient solution, and the cleaning solution, respectively. In this case, the valve core 2112 may also have three or more connected positions. When the valve core 2112 is in different connected positions, the corresponding inlet pipe 212 is connected to the outlet pipe 213, and the fluid in the corresponding inlet pipe 212 can flow to the outlet pipe 213.

[0081] Regarding the specific method by which the pump host 100 drives the valve core 2112 of the control valve 211 to rotate, please refer to... Figure 5 As shown, the end of the valve housing 2111 facing the pump host 100 can be open. The valve core 2112 can be installed in the cavity of the valve housing 2111 through this opening. A reversing groove 21121 can be provided on the side of the valve core 2112 facing the pump host 100, and the reversing groove 21121 is exposed in the opening of the valve housing 2111. Correspondingly, a switching element 180 is provided on the pump host 100. The size and shape of the switching element 180 match the reversing groove 21121. The switching element 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 extending direction of the reversing groove 21121 is staggered with the center line of the outlet 21112. It should be noted that this staggered arrangement means that the extending 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 extending direction of the reversing groove 21121 can be perpendicular to the center line of the outlet 21112 of the valve housing 2111. Thus, when assembling the valve mechanism 211, the mounting 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, thereby accurately positioning the initial position of the valve core 2112.

[0083] In the embodiment shown in the drawings, the switching member 180 is a rotating shaft structure, and the pump main body 100 drives the switching member 180 to rotate to realize switching of the valve core 2112 between different positions. 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 realize switching of the valve core 2112 between different positions.

[0084] Figure 6 A structural schematic diagram of a first driving mechanism provided for an embodiment of the present application is shown in FIG. 5. Referring to FIG. 5, in order to drive the switching member 180 and the anti-falling member 160 to move, in the embodiment, the pump main body 100 is further provided with a first driving mechanism 500, which can be installed in the pump main body 100, and the first driving mechanism 500 drives the switching member 180 and the anti-falling member 160 to move. Figure 6

[0085] The switching member 180 is connected with 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 be moved to a communication position or a cut-off position.

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

[0087] It should be noted that when the switching member 180 is located at the communication position, the anti-falling member 160 is located at the locking position to avoid the fluid delivery mechanism from falling off in the infusion state. Moreover, when the switching member 180 is located at the cut-off position, the anti-falling member 160 is located at the unlocking position to facilitate the fluid delivery mechanism to be taken off.

[0088] Continuing to refer to FIG. 5, in some embodiments, the first driving mechanism 500 can include a first driving member 510, which simultaneously drives the switching member 180 and the anti-falling member 160 to move. In this way, the first driving mechanism 500 has a lower cost, which can reduce the overall cost of the nutritional pump; and only one first driving member 510 needs to be arranged in the pump main body 100 as the driving force source of the switching member 180 and the anti-falling member 160, the first driving mechanism 500 occupies a smaller space as a whole, which is convenient for structural layout design in the pump main body 100, and is conducive to miniaturization of the nutritional pump. Figure 6 ​​

[0089] The first driving member 510 can be a driving motor which converts electric energy into mechanical energy and outputs rotation speed and torque to drive the switching member 180 and the anti-falling member 160 to move. Since the driving motor usually has a high rotation speed and a small torque, a speed reducer 520 can be further arranged to be connected to the output end of the driving motor. The speed reducer 520 can reduce the rotation speed and increase the torque to output appropriate rotation speed and torque to meet the movement requirements of the switching member 180 and the anti-falling member 160.

[0090] That is, the first driving mechanism 500 can further include the speed 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-falling member 160 through the speed reducer 520. Hereinafter, the first driving mechanism 500 is taken as an example which includes the first driving member 510 and the speed reducer 520 for description.

[0091] When the first driving mechanism 500 has only one first driving member 510 which drives the switching member 180 and the anti-falling member 160 at the same time, the first driving mechanism 500 can 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-falling member 160 are respectively connected to the output end of the first transmission assembly 530. The first driving member 510 drives the first transmission assembly 530 to drive the switching member 180 and the anti-falling 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 with the first driving member 510, the switching member 180 is connected to the output end of the first transmission member 531, and the anti-falling 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 to drive the switching member 180 to move, and the first driving member 510 transmits power to the second transmission member 532 to drive the anti-falling member 160 to move.

[0093] Specifically, the first transmission member 531 can be a gear or a rack structure, and the second transmission member 532 can also be a gear or a rack structure. The first transmission member 531 and the second transmission member 532 can be respectively in transmission connection with the speed reducer 520, and the speed reducer 520 simultaneously transmits power to the first transmission member 531 and the second transmission member 532; or the first transmission member 531 and the second transmission member 532 can be in meshing with each other, and one of the first transmission member 531 and the second transmission member 532 is in transmission connection with the speed reducer 520, and the speed reducer 520 transmits power to the transmission member which is in meshing therewith, and the transmission member transmits power to the other transmission member.

[0094] In this regard, the worm structure 540 can be connected to the output end of the speed reducer 520, and the first transmission assembly 530 is engaged with the worm structure 540. The first transmission assembly 530 and the worm structure 540 cooperate to drive the switching piece 180 and the anti-falling piece 160 to move. For example, the first transmission piece 531 and the second transmission piece 532 can be engaged with the worm structure 540, or one of the first transmission piece 531 and the second transmission piece 532 is engaged with the worm structure 540, and the first transmission piece 531 and the second transmission piece 532 are engaged with each other.

[0095] Referring to Figure 6 As an embodiment, the first transmission piece 531 is a gear, the second transmission piece 532 is also a gear, and the second transmission piece 532 is engaged with the first transmission piece 531, and the first transmission piece 531 is connected with the worm structure 540. The speed reducer 520 transmits power to the first transmission piece 531 through the worm structure 540, the first transmission piece 531 drives the switching piece 180 to rotate, and the switching piece 180 is switched between different positions; at the same time, the first transmission piece 531 transmits power to the second transmission piece 532 engaged therewith, and the second transmission piece 532 drives the anti-falling piece 160 to rotate, and the anti-falling piece 160 is switched between the locking position and the unlocking position.

[0096] Of course, in other embodiments, when the first transmission piece 531 and the second transmission piece 532 are gears, the second transmission piece 532 can be engaged with the worm structure 540, and the first transmission piece 531 is engaged with the second transmission piece 532, and the power is transmitted from the second transmission piece 532 to the first transmission piece 531. Alternatively, the first transmission piece 531 and the second transmission piece 532 can be engaged with the worm structure 540 respectively, and the worm structure 540 transmits power to the first transmission piece 531 and the second transmission piece 532 simultaneously.

[0097] Alternatively, the first transmission piece 531 and the second transmission piece 532 can also be racks, and one of the first transmission piece 531 and the second transmission piece 532 can be engaged with the worm structure 540, and the two are engaged with each other; or the first transmission piece 531 and the second transmission piece 532 can be engaged with the worm structure 540, and the embodiment is not limited.

[0098] When the first transmission piece 531 and the second transmission piece 532 are racks, the worm structure 540 can drive the first transmission piece 531 and the second transmission piece 532 to translate. At this time, the first transmission piece 531 can drive the switching piece 180 to translate, and the switching piece 180 is switched between different positions; the second transmission piece 532 drives the anti-falling piece 160 to translate, and the anti-falling piece 160 is switched between the locking position and the unlocking position.

[0099] Alternatively, one of the first transmission member 531 and the second transmission member 532 can be a gear, and the other can be a rack, and one of the first transmission member 531 and the second transmission member 532 can be engaged with the worm structure 540, and the other can be engaged with the worm structure 540; or, the first transmission member 531 and the second transmission member 532 can be engaged with the worm structure 540, and the embodiment is not limited in this regard.

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

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

[0102] The following are described by way of example with the first transmission member 531 and the second transmission member 532 both being gears and being engaged with each other.

[0103] Continuing to refer to Figure 6 In actual applications, the worm structure 540 can be arranged along the planar direction of the pump main machine 100, or the first driving member 510, the speed reducer 520, and the worm structure 540 can be arranged along the planar direction of the pump main machine 100, for example, the worm structure 540 is parallel to the operation surface of the pump main machine 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-falling member 160 connected to the second transmission member 532 are both vertically arranged on the operation surface of the pump main machine 100.

[0104] In some embodiments, the first driving member 510 and the speed reducer 520 can also be arranged perpendicularly to the plane direction of the pump main body 100, for example, the output end of the speed reducer 520 extends perpendicularly to the operation surface of the pump main body 100. At this time, when the rotation speed and the torque output by the speed reducer 520 are appropriate, the worm structure 540 can not be connected to the output end of the speed reducer 520, but the first transmission member 531 or the second transmission member 532 can be sleeved on the output end of the speed reducer 520, and the gear shaft of the first transmission member 531 and the gear shaft of the second transmission member 532 both extend perpendicularly to the operation surface of the pump main body 100, and the switching member 180 and the anti-falling member 160 can also be vertically arranged on the operation surface of the pump main body 100.

[0105] As for the matching arrangement between the first transmission member 531 and the second transmission member 532, when the rotation angle of the switching member 180 between different positions is consistent with the rotation angle of the anti-falling member 160 between the locking position and the unlocking position, the diameter of the first transmission member 531 and the diameter of the second transmission member 532 can remain consistent, the first transmission member 531 and the second transmission member 532 rotate at the same rotation 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 between different positions is inconsistent with the rotation angle of the anti-falling member 160 between the locking position and the unlocking position, the diameter of the first transmission member 531 and the diameter of the second transmission member 532 can 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 required rotation angle of the switching member 180 and the required rotation angle of the anti-falling member 160, and the diameter of the first transmission member 531 and the diameter of the second transmission member 532 are determined.

[0107] For example, when the rotation angle of the switching member 180 between different positions is less than the rotation angle of the anti-falling member 160 between the locking position and the unlocking position, the diameter of the first transmission member 531 can be greater than the diameter of the second transmission member 532. Conversely, when the rotation angle of the switching member 180 between different positions is greater than the rotation angle of the anti-falling member 160 between the locking position and the unlocking position, the diameter of the first transmission member 531 can be less than the diameter of the second transmission member 532.

[0108] By designing the diameter of the first transmission member 531 and the diameter of the second transmission member 532, it can be ensured that when the switching member 180 is located at the communication position, the anti-falling member 160 is located at the locking position, so as to avoid the fluid delivery mechanism from falling off in the infusion state. And it can be ensured that when the switching member 180 is located at the cutoff position, the anti-falling member 160 is located at the unlocking position, so as to facilitate the removal of the fluid delivery mechanism.

[0109] In addition to relying on a first driving member 510 to simultaneously drive the switching member 180 and the anti-falling member 160 to move, two first driving members 510 can be provided to drive the switching member 180 and the anti-falling member 160 to move, respectively. In other words, the first driving mechanism 500 can include two first driving members 510, one of the two first driving members 510 is connected with the switching member 180 and drives the switching member 180 to move, and the other of the two driving members is connected with the anti-falling member 160 and drives the anti-falling member 160 to move.

[0110] By providing two first driving members 510 to drive the switching member 180 and the anti-falling member 160, respectively, the driving mode of the switching member 180 and the anti-falling member 160 is simpler, and only needs to design the transmission structure according to the displacement (such as the rotation angle) required by the switching member 180 and the anti-falling member 160, respectively, without considering the transmission ratio design when the switching member 180 and the anti-falling member 160 need to be transmitted.

[0111] Similar to the aforementioned driving of the switching member 180 and the anti-falling member 160 by one first driving member 510, when the switching member 180 and the anti-falling member 160 are driven by two first driving members 510, respectively, the two first driving members 510 can each include a driving motor and a speed reducer 520. And when the switching member 180 and the anti-falling member 160 are both driven by gear or rack transmission, a worm structure 540 can also be connected to the output end of the speed reducer 520, the gear or rack connected with the switching member 180 is engaged with one of the worm structures 540, and the gear or rack connected with the anti-falling member 160 is engaged with the other worm structure 540.

[0112] Taking the example of the switching member 180 and the anti-falling member 160 being driven by gear transmission, the worm structures 540 connected to the two first driving members 510 can be arranged along the plane direction of the pump main machine 100, for example, the two worm structures 540 are parallel to the operation surface of the pump main machine 100, and the shaft structure of the gear connected with the switching member 180 and the shaft structure of the gear connected with the anti-falling member 160 can be perpendicular to the worm structure 540, so that the switching member 180 and the anti-falling member 160 are both vertically erected on the operation surface of the pump main machine 100.

[0113] Alternatively, the two first driving members 510 and the reducers 520 connected therewith can also be arranged perpendicular to the plane direction of the pump main machine 100, for example, the output ends of the two reducers 520 are both vertically extended to the operation surface of the pump main machine 100. At this time, when the rotation speed and torque output by the two reducers 520 are appropriate, the worm structure 540 can not be connected at the output ends of the two reducers 520, but the switching member 180 and the anti-falling member 160 are directly connected at the output ends of the corresponding reducers 520, and the switching member 180 and the anti-falling member 160 can also be both vertically erected on the operation surface of the pump main machine 100.

[0114] Figure 7 A structural schematic diagram of a second driving mechanism provided in the embodiment of the application is shown in Figure 7 In order to drive the rotation of the pump wheel 300, in the embodiment, the second driving mechanism 600 is further arranged on the pump main machine 100, and the second driving mechanism 600 can also be installed in the pump main machine 100, and the pump wheel 300 is connected at the output end of the second driving mechanism 600, and the second driving mechanism 600 drives the rotation of the pump wheel 300.

[0115] Specifically, the second driving mechanism 600 can 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 is extended to the outside of the pump main machine 100, and the pump wheel 300 is connected at the output end of the second transmission assembly 620. The second driving member 610 is used for providing driving force and transmitting the driving force to the second transmission assembly 620, and driving the pump wheel 300 to rotate through the second transmission assembly 620.

[0116] For example, the output end of the second transmission assembly 620 can be designed as the structure of a transmission shaft, the output end of the second transmission member 532 is used as the pump main shaft of the pump main machine 100, and the pump wheel 300 can be sleeved on the pump main shaft, and the pump main shaft rotates to drive the pump wheel 300 to rotate synchronously.

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

[0118] Continuing to refer to Figure 7 The second driving mechanism 600 can also drive the pump wheel 300 to rotate through the gear transmission. Specifically, the second transmission assembly 620 can 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 in meshing with the first gear 621, the output end of the second gear 622 is used as the pump main shaft, and the pump wheel 300 is sleeved on the pump main shaft.

[0119] The rotation speed of the output of the second driving member 610 is usually high and the torque is usually small, in order to make the pump spindle on the second gear 622 rotate at a suitable speed, the second transmission assembly 620 should reduce the rotation speed and increase the torque. In this regard, the diameter of the first gear 621 can be smaller than the diameter of the second gear 622 to reduce the rotation speed of the pump spindle.

[0120] In addition, in the embodiment, the output end of the second driving member 610 can not be provided with a speed reducer 520, but the second transmission assembly 620 is 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 speed, a third gear 623 can also be added, that is, the second transmission assembly 620 can also include a third gear 623, the third gear 623 can be coaxially arranged with the first gear 621, and the third gear 623 is in transmission connection with the output end of the second driving member 610.

[0121] The diameter of the third gear 623 can be greater than the diameter of the first gear 621. In this way, compared with the first gear 621 directly in transmission connection with the output end of the second driving member 610, by arranging the third gear 623 in transmission connection with the output end of the second driving member 610, the rotation speed of the gear shaft common to the third gear 623 and the first gear 621 can be reduced, and then by transmission between the first gear 621 with a smaller diameter and the second gear 622 with the largest diameter, the rotation speed of the pump spindle on the second gear 622 can be reduced to a suitable range.

[0122] Of course, if the output end of the second driving member 610 is provided with a speed reducer 520, the third gear 623 can also be omitted to reduce the rotation speed, the first gear 621 can be directly in transmission connection with the output end of the speed reducer 520, or even the first gear 621 can be omitted, and the second gear 622 can be directly in transmission connection with the output end of the speed reducer 520.

[0123] Continuing to refer to Figure 7 Similarly to the first driving mechanism 500, when the second driving member 610 is arranged along the planar direction of the pump main machine 100, a worm structure can also be connected to the output end of the second driving member 610, for the convenience of description, the worm structure connected to the second driving member 610 in the embodiment is defined as a transmission worm 630, the gear shafts of the gears in the second transmission assembly 620 can be parallel to each other and perpendicular to the transmission worm 630, so that the pump spindle on the second gear 622 is vertically extended on the operation surface of the pump main machine 100, so as to be connected with the pump wheel 300.

[0124] Alternatively, the second driving member 610 can also be arranged perpendicularly to the plane direction of the pump main body 100, for example, the output end of the second driving member 610 extends perpendicularly to the operation surface of the pump main body 100. At this time, the transmission worm 630 can not be connected to the output end of the second driving member 610, and the third gear 623 can also not be arranged, but the first gear 621 is directly sleeved on the output end of the second driving member 610, and the pump spindle extending perpendicularly on the second gear 622 engaged with the first gear 621 extends on the operation surface of the pump main body 100, so as to facilitate the connection between the pump wheel 300 and the pump main body 100.

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

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

[0127] When the pump main body 100 receives an instruction to select a certain liquid inlet pipe 212 (for example, the first liquid inlet pipe 2121) for infusion, before starting the infusion, the first driving mechanism 500 on the pump main body 100 works, the first driving member 510 operates to drive the switching member 180 and the valve core 2112 of the control valve 211 to move to a certain communication position (for example, the first communication position), and at the same time, the anti-falling member 160 is moved to the locking position. Then, the second driving mechanism 600 is started, the second driving member 610 operates to drive the pump wheel 300 to rotate and start the infusion.

[0128] It should be noted that before the second driving mechanism 600 drives the pump wheel 300 to rotate, the fluid passage in the delivery assembly 210 is blocked by the extrusion of the pump wheel 300 on the connecting pipe 214 of the delivery assembly 210, so that even if the control valve 211 is in a state of connecting a certain liquid inlet pipe 212 and liquid outlet pipe 213, no free flow will occur in the delivery assembly 210.

[0129] When the pump host 100 receives an instruction to select another liquid inlet pipe 212 (for example, the second liquid inlet pipe 2122) for infusion, before starting the infusion, the first driving mechanism 500 on the pump host 100 works, the first driving part 510 operates, drives the switching part 180 and the valve core 2112 of the control valve 211 to move to another communication position (for example, the second communication position), and at the same time, drives the anti-falling part 160 to move to the locking position. Then, the second driving mechanism 600 starts to work, the second driving part 610 operates, drives the pump wheel 300 to rotate, and starts the infusion.

[0130] It should be noted that when the switching part 180 drives the valve core 2112 of the control valve 211 to move between different communication positions, the orientation of the anti-falling part 160 will also move, but when the switching part 180 drives the valve core 2112 of the control valve 211 to move to any communication position, the position of the anti-falling part 160 after moving is in the locking position.

[0131] When the pump host 100 receives an instruction to stop the infusion, the second driving part 610 first stops working to stop the pump wheel 300 from rotating. Then, the first driving part 510 operates to drive the switching part 180 to move to the initial position, the switching part 180 drives the valve core 2112 of the control valve 211 to return to the blocking position, and at the same time, drives the anti-falling part 160 to return 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 orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting 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, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A nutrient pump, characterized in that, include: A pump unit, wherein the pump unit is provided with a first drive mechanism, a switching component and an anti-drop component; The first driving mechanism is connected to the switching component and drives the switching component to move between at least two positions; the first driving mechanism is connected to the anti-drop component and drives the anti-drop component to move between at least two positions. A fluid delivery mechanism is configured to be detachably connected to the pump host; the fluid delivery mechanism includes a control valve and a connecting seat, the switching element is configured to switch the conduction state of the control valve, and the anti-detachment element is configured to be detachably connected to the connecting seat; The switching element has at least two positions including a connected position and a cut-off position, and the anti-detachment element has at least two positions including a locked position and an unlocked position; when the switching element is in the connected position, the anti-detachment element is in the locked position; when the anti-detachment element is in the unlocked position, the switching element is in the cut-off position.

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

3. The nutrient pump according to claim 2, characterized in that, The first drive mechanism further includes a first transmission assembly, which is connected to the first drive member in a transmission manner. The switching member and the anti-dropping member are respectively connected to the output end of the first transmission assembly.

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

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

6. The nutrient pump according to claim 5, characterized in that, The first driving mechanism further includes a worm gear structure, which is connected to the first driving member in a transmission manner, and both the first and second driving members mesh with the worm gear structure. Alternatively, one of the first transmission member and the second transmission member engages with the worm gear structure, and the first transmission member engages with the second transmission member.

7. The nutrient pump according to claim 6, characterized in that, The first drive mechanism further includes a reducer, and the first drive component is connected to the worm gear structure through the reducer.

8. The nutrient pump according to claim 1, characterized in that, The first driving mechanism includes two first driving components, one of which is connected to the switching component, and the other of which is connected to the anti-drop component.

9. The nutrient pump according to claim 1, characterized in that, The pump host is also provided with a second drive mechanism, which is configured to drive the pump wheel to rotate.

10. The nutrient pump according to claim 9, characterized in that, The second drive mechanism includes a second drive member and a second transmission assembly that are connected by a transmission, with the output end of the second transmission assembly extending outside the pump host.

11. The nutrient pump according to claim 10, characterized in that, The nutrient pump also includes a pump wheel, which is connected to the output end of the second transmission assembly.

12. The nutrient pump according to claim 1, characterized in that, When the switching component is in the cut-off position, the anti-fall-off component is in the unlocked position.

Images