Self-adaptive flow regulation energy-saving pump and infusion system

Abstract

The utility model discloses a self-adaptation flow regulation energy-saving pump and an infusion system, and belongs to the technical field of microfluid control medical equipment, the self-adaptation flow regulation energy-saving pump comprises a pump body and a shell covering the pump body, the pump body is connected with a medicine bag in the shell in a sealed mode, and the medicine bag is used for storing liquid medicine to be infused. The pump body and the shell jointly form a positive pressure closed space used for extruding the medicine bag to infuse liquid medicine. The pump body is provided with an infusion liquid medicine inlet and an infusion liquid medicine outlet which are communicated with the medicine bag, a flow adjusting bag is arranged in the infusion liquid medicine channel corresponding to the infusion liquid medicine outlet, and a pressure transmission channel communicated with the flow adjusting bag and the positive pressure closed space is arranged in the pump body. According to the self-adaptive flow regulation energy-saving pump and the infusion system, self-adaptive flow regulation of infusion flow is achieved, design is reasonable, infusion flow precision is high, continuous output can be achieved, an additional electric control closed-loop regulation device is not needed, the structure is simple, the size is small, cost and energy consumption are low, the service life is long, and safety is high.

Description

Technical Field

[0001] The utility model relates to the technical field of microfluid control medical equipment, in particular to an adaptive flow regulating energy-saving pump and an infusion system. Background Art

[0002] At present, most clinical analgesic pumps use peristaltic pumps, which continuously squeeze and release the special elastic silicone tube through the pump head to achieve continuous pumping of the drug solution. The drug infusion flow rate is controlled by adjusting the motor speed. For analgesic drug infusions with high flow accuracy requirements, a flow sensor is used to monitor the flow rate and feedback is used to control the peristaltic pump speed in a closed loop, thereby achieving the purpose of precise flow control. However, as the use time increases, the elasticity of the infusion pipeline will change, affecting the adjustment time and flow accuracy level of the closed-loop control infusion flow accuracy; the peristaltic pump needs to continuously drive the pump head to rotate, and in scenarios where a large flow rate needs to be infused, it consumes more power and is not suitable for battery power supply; in scenarios where a micro flow rate needs to be infused, the infusion flow accuracy will be greatly reduced, and it can only be output intermittently.

[0003] Infusion pumps that use positive pressure to drive the infusion of liquid medicine have also appeared on the market. Its driving principle is: place the medicine bag in a closed positive pressure environment (higher than atmospheric pressure), and use the pressure difference between the closed positive pressure environment and the atmospheric pressure to drive the liquid medicine from the medicine bag into the patient's target position. However, the liquid flow rate of this type of infusion pump is mainly determined by the pressure of the closed positive pressure environment where the medicine bag is located, that is, the pipeline resistance. As the liquid in the medicine bag changes, the pressure of the closed positive pressure environment will change accordingly, and then the amount of infused medicine will also change; if the pipeline resistance changes, such as different patient postures, the output liquid volume will also change.

[0004] Invention patent CN114652917B discloses an implantable infusion pump, the working principle of which is: using a syringe to insert the liquid medicine inlet of the shell, injecting the liquid medicine into the medicine bag through the sealing silicone at the entrance of the medicine bag, the medicine bag is used to store the liquid medicine, when the liquid medicine is injected, the edge of the medicine bag begins to gradually move upward, and the internal pressure of the medicine bag gradually rises, and then when the liquid medicine is infused into the patient's body, the medicine bag presses the liquid medicine into the active flow valve, which is used to adjust the infusion flow rate, and under the action of the pump control module, the liquid medicine is transported to the liquid medicine outlet of the shell and injected into the patient's body. It has been found through research that the implantable infusion pump adopts an adaptive flow valve with a specific structure, including a conductive element, a sealing membrane, and a specific pipeline connection relationship, which leads to a cumbersome structure and a slightly larger volume, and there is room for further improvement. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an adaptive flow regulating energy-saving pump and an infusion system which have simple structure, small volume, low cost and energy consumption.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0007] On the one hand, an adaptive flow regulating energy-saving pump is provided, comprising a pump body and a housing provided on the pump body, wherein:

[0008] The pump body is sealed in the shell with a medicine bag for storing the medicine to be infused, and the pump body and the shell together form a positive pressure sealed space for squeezing the medicine bag to infuse the medicine;

[0009] The pump body is provided with an infusion liquid inlet and an infusion liquid outlet connected to the medicine bag, a flow regulating bag is provided in the infusion liquid channel corresponding to the infusion liquid outlet, and a pressure transmission channel connecting the flow regulating bag and the positive pressure closed space is provided in the pump body.

[0010] Furthermore, an annular groove is provided on the side wall of the drug infusion channel at the flow regulating bag, and the flow regulating bag and the annular groove together form a drug dosage regulating port.

[0011] Furthermore, the flow regulating bag includes a straight connecting portion connected to the outlet of the pressure transmission channel and a spherical expanded portion connected to the straight connecting portion and capable of matching with the annular groove.

[0012] Furthermore, a connecting boss is provided on one side of the pump body close to the medicine bag, and the opening of the medicine bag is sealed and connected to the connecting boss by using a low-temperature welding process.

[0013] Furthermore, the positive pressure enclosed space is filled with an inert gas.

[0014] Furthermore, a bacterial filter is provided in the infusion liquid channel downstream of the flow regulating capsule.

[0015] Furthermore, an anti-clogging design is added to the inlet of the pressure transmission channel.

[0016] On the other hand, an infusion system is provided, comprising the above-mentioned adaptive flow regulation energy-saving pump, wherein the infusion liquid outlet is connected to a pipeline leading to the patient, and the pipeline is provided with an active flow valve and a pump control module that controls the connection of the active flow valve.

[0017] Further, the active flow valve includes a valve body, a valve core channel arranged in the valve body, a permanent magnetic valve core located in the valve core channel, and a coil arranged on the side wall of the valve body corresponding to the valve core channel, wherein:

[0018] The permanent magnetic valve core is conical, the front end of the permanent magnetic valve core extends into the outlet pipe of the active flow valve, and the tail end of the permanent magnetic valve core is sleeved with a damping sealing ring;

[0019] The pump control module controls the connection of the coil.

[0020] Furthermore, a bacteria filter is provided at the outlet of the active flow valve.

[0021] The utility model has the following beneficial effects:

[0022] The utility model discloses an adaptive flow regulating energy-saving pump and infusion system, in which a flow regulating capsule is added to the infusion liquid channel corresponding to the infusion liquid outlet, and a pressure transmission channel connecting the flow regulating capsule and the positive pressure closed space is provided in the pump body. Compared with the prior art, the utility model discloses an adaptive flow regulating energy-saving pump and an infusion liquid channel, in which a flow regulating capsule is added to the infusion liquid channel corresponding to the infusion liquid outlet, and a pressure transmission channel connecting the flow regulating capsule and the positive pressure closed space is provided in the pump body. Compared with the prior art, the utility model discloses an adaptive flow regulating energy-saving method, in which the infusion flow is offset due to the change of the amount of medicine to be infused, and the infusion flow is offset due to the change of the infusion liquid outlet pressure, so that the infusion flow is adaptively regulated, the design is reasonable, the infusion flow is high in precision, and the infusion flow can be continuously outputted without the need for an additional electrically controlled closed-loop regulating device, the structure is simple, the volume is small, the cost and energy consumption are low, the service life is long, and the safety is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic cross-sectional view of the utility model of the energy-saving self-adaptive flow regulation pump when the medicine bag is half full;

[0024] Figure 2 This is a schematic cross-sectional view of the utility model of the adaptive flow regulating energy-saving pump when the medicine bag is fully filled;

[0025] Figure 3 for Figure 1 A schematic diagram of the enlarged structure of the middle flow regulating capsule;

[0026] Figure 4 This is a schematic diagram of the structure of the active flow valve that matches the adaptive flow regulating energy-saving pump of the utility model. DETAILED DESCRIPTION

[0027] In order to make the technical problems to be solved, technical solutions and advantages of the present invention more clear, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0028] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0029] In order to achieve a stable infusion flow, some existing technologies add a flow control valve at the outlet of the infusion liquid, and add a flow sensor or other methods to monitor the flow change in real time, and feed back the flow control valve for closed-loop control to achieve the effect of stable infusion flow. The disadvantages are that the cost is greatly increased, the volume becomes larger, and the precision components required for fluid closed-loop control need to be added. In order to solve the problems existing in the existing technology, the utility model provides the following technical solutions.

[0030] On the one hand, the utility model provides an adaptive flow regulating energy-saving pump, such as Figure 1-3 As shown, it includes a pump body 1 and a housing 2 covered on the pump body 1, wherein:

[0031] The pump body 1 is sealed and connected to a medicine bag 3 (retractable) for storing the medicine liquid 10 to be infused in the shell 2, and the pump body 1 and the shell 2 together form a positive pressure closed space 4 for squeezing the medicine bag 3 to infuse the medicine liquid (specifically, an inert gas can be filled between the pump body 1 and the shell 2 to form the positive pressure closed space 4);

[0032] The pump body 1 is provided with an infusion liquid inlet (not shown) and an infusion liquid outlet 12 which are connected to the medicine bag 3, and a flow regulating bag 5 is provided in the infusion liquid channel 13 corresponding to the infusion liquid outlet 12. The pump body 1 is provided with a pressure transmission channel 14 which connects the flow regulating bag 2 and the positive pressure enclosed space 4.

[0033] The working principle of the adaptive flow regulating energy-saving pump of the utility model is as follows:

[0034] The infusion liquid 10 is added to the medicine bag 3 through the infusion liquid inlet (not shown) using a special syringe. As the amount of medicine added increases, the medicine bag 3 is gradually expanded until the bottom of the medicine bag 3 contacts the bottom of the (positive pressure sealed container) shell 2 (see Figure 2 ), the professional syringe will no longer be able to add the infusion liquid 10. After the infusion liquid 10 is filled, the infusion switch (not shown) is turned on, the positive pressure closed space 4 squeezes the medicine bag 3, and the infusion liquid 10 passes through the infusion liquid channel 13, the flow regulating bag 5 and the infusion liquid outlet 12 in sequence under the squeezing of the medicine bag 3 and enters the pipeline leading to the patient (not shown);

[0035] During the infusion process, as the amount of the infused liquid 10 decreases, the medicine bag 3 gradually shrinks (see Figure 1), the positive pressure P2 of the gas in the positive pressure closed space 4 gradually decreases, while the internal pressure of the medicine bag 3 remains unchanged, resulting in a smaller pressure difference for squeezing the capsule body of the medicine bag 3, and a smaller positive pressure driving force for infusing the medicine. If other conditions remain unchanged, the infusion flow rate will also decrease. However, the pressure transmission channel 14 in the utility model makes the internal pressure P1 of the flow regulating capsule 5 equal to the internal pressure P2 of the positive pressure closed space 4, so when P2 decreases, P1 also decreases, and the flow regulating capsule 5 contracts as P1 decreases, so that the infusion liquid channel 13 corresponding to the infusion liquid outlet 12 increases the opening amount, and the resistance of the infusion liquid passing through it decreases accordingly. If the infusion flow rate is small, and other conditions remain unchanged, the infusion flow rate will increase; combining the two factors described above, that is, the flow rate to be infused decreases, the medicine bag 3 shrinks accordingly, and P2 decreases accordingly, causing the infusion driving pressure of the infusion liquid 10 to be infused (that is, the internal pressure P2 of the positive pressure closed space 4) to decrease, and also causing the contraction pressure P1 of the flow regulating bag 5 to decrease. Since the driving pressure P2 of the medicine bag 3 and the contraction pressure P1 of the flow regulating bag 5 have the same pressure change rate, the opening amount of the infusion liquid channel 13 corresponding to the flow calibration infusion liquid outlet 12 can offset the flow fluctuation caused by the reduction of the amount of the infusion liquid 10 to be infused;

[0036] The infusion liquid 10 enters the pipeline leading to the patient through the infusion liquid outlet 12. During the infusion process, the patient's posture changes, causing the infusion liquid resistance to change, which will cause the pressure P3 of the infusion liquid outlet 12 to change, and will be transmitted to the outer wall liquid of the flow regulating capsule 5 through this port, thereby affecting the compression or expansion of the flow regulating capsule 5; in the first case, assuming that P3 becomes larger and other conditions remain unchanged, it can be known from the fluid principle that the infusion flow rate will become smaller; but in this solution, due to the existence of the flow regulating capsule 5, when P3 becomes larger and P1 remains unchanged, the flow regulating capsule 5 will be compressed, and the infusion will be reduced. The opening volume of the infusion liquid channel 13 corresponding to the injection liquid outlet 12 (that is, the dosage adjustment port 16 below) will become larger; based on the above two factors, the infusion flow fluctuation caused by the increase of P3 can be partially offset; in the second case, assuming that P3 becomes smaller and other conditions are assumed to remain unchanged, it can be known from the fluid principle that the infusion flow will increase; but in this solution, due to the existence of the flow adjustment capsule 5, when P3 becomes smaller and P1 remains unchanged, the flow adjustment capsule 5 will become larger, and then the dosage adjustment port 16 will become smaller; based on the above two factors, the infusion flow fluctuation caused by the decrease of P3 can be partially offset.

[0037] The adaptive flow regulating energy-saving pump of the utility model is provided with a flow regulating capsule in the infusion liquid channel corresponding to the infusion liquid outlet, and a pressure transmission channel connecting the flow regulating capsule and the positive pressure closed space is provided in the pump body. Compared with the prior art, the utility model adopts a positive pressure driven energy-saving method, which can offset the infusion flow fluctuation caused by the change of the amount of medicine to be infused, and can also offset the infusion flow fluctuation caused by the change of the infusion liquid outlet pressure, so that the infusion flow is adaptively regulated, the design is reasonable, the infusion flow accuracy is high, and it can be continuously output without the need for an additional electrically controlled closed-loop regulating device, the structure is simple, the volume is small, the cost and energy consumption are low, the service life is long, and the safety is high.

[0038] The utility model specifically relates to a medical high-precision, small-flow energy-saving pump, which can solve the problem of control fluctuation of infusion liquid flow rate as the amount of medicine changes, the problem of infusion liquid flow rate changing with pipeline resistance, and energy consumption problems; its pressure transmission channel is used to keep the gas pressure P1 in the positive pressure closed space consistent with the pressure P2 in the flow regulating bag, that is, P1=P2; the retractable medicine bag is used to store the medicine to be infused, and under the drive of the gas pressure in the positive pressure closed space, the volume of the medicine bag will change adaptively with the amount of medicine stored inside; the outer shell and the pump body together form a positive pressure closed space.

[0039] like Figure 1-3 As shown, an annular groove 15 can be provided on the side wall of the infusion liquid channel 13 at the flow regulating capsule 5, and the flow regulating capsule 5 and the annular groove 15 together form a drug dosage regulating port 16. The setting of the annular groove 15 facilitates the formation of the drug dosage regulating port 16. In this way, when the pressure P2 in the positive pressure closed space 4 changes, the drug dosage regulating port 16 will adaptively adjust the resistance of the infusion liquid outlet 12 along with the flow regulating capsule 5, so as to better avoid fluctuations in the infusion flow.

[0040] like Figure 3 As shown, the flow regulating capsule 5 may include a straight connecting portion 51 connected to the outlet of the pressure transmission channel 14 and a spherical expanded portion 52 connected to the straight connecting portion 51 and capable of cooperating with the annular groove 15, so that when the pressure P2 in the positive pressure closed space 4 changes, the spherical expanded portion 52 of the flow regulating capsule 5 contracts / expands and cooperates with the annular groove 15 to better avoid fluctuations in the infusion flow.

[0041] like Figure 1 As shown, a connecting boss 17 may be provided on one side of the pump body 1 close to the medicine bag 3, and the opening of the medicine bag 3 is sealed and connected to the connecting boss 17 by a low-temperature welding process to facilitate the sealed connection between the medicine bag 3 and the pump body 1, with a good sealing effect and a pressure resistance greater than 100 kPa.

[0042] Continue as Figure 1As shown, a bacterial filter 6 may be provided downstream of the flow regulating capsule 5 in the infusion liquid channel 13 to filter the liquid infused into the patient to prevent bacterial infection. An anti-blocking design may be added to the entrance of the pressure transmission channel 14 to prevent blockage. The anti-blocking design may adopt common knowledge in the art and will not be described in detail here.

[0043] On the other hand, the utility model provides an infusion system, including the above-mentioned adaptive flow regulation energy-saving pump, the infusion liquid outlet 12 is connected to a pipeline for leading to the patient, and the pipeline is provided with an active flow valve 7 and a pump control module (not shown) that controls the active flow valve 7.

[0044] When in use, the adaptive flow regulating energy-saving pump delivers the liquid medicine 10 to be infused to the active flow valve 7. The active flow valve 7 is used to turn on / off the infusion and further adjust the infusion flow rate. Under the action of the pump control module, the active flow valve 7 delivers the liquid medicine 10 to be infused into the patient's body, further improving the infusion flow accuracy.

[0045] The infusion system of the utility model has an adaptive flow regulating energy-saving pump with a flow regulating capsule in the infusion liquid channel corresponding to the infusion liquid outlet, and a pressure transmission channel connecting the flow regulating capsule and the positive pressure closed space is provided in the pump body. Compared with the prior art, the utility model can offset the infusion flow fluctuation caused by the change of the amount of medicine to be infused, and can also offset the infusion flow fluctuation caused by the change of the outlet pressure of the infusion liquid. It has a reasonable design, high infusion flow accuracy, can output continuously, and has a simple structure, small size, low cost and energy consumption, long service life, and high safety. The infusion system of the utility model can be a non-implantable system, preferably an implantable system.

[0046] like Figure 4 As shown, the active flow valve 7 may include a valve body 71, a valve core channel 73 disposed in the valve body 71, a permanent magnetic valve core 74 located in the valve core channel 73, and a coil 75 disposed on the side wall of the valve body 71 and corresponding to the valve core channel 73, wherein:

[0047] The permanent magnetic valve core 74 is conical, and the front end of the permanent magnetic valve core 74 extends into the outlet pipe 76 of the active flow valve 3. The tail end of the permanent magnetic valve core 74 is sleeved with a damping sealing ring 79;

[0048] The pump control module controls the connection coil 75 .

[0049] In the active flow valve 7, a valve downstream cavity 78 is formed between the permanent magnetic valve core 74 and the outlet pipe 76, a valve upstream cavity 77 is formed between the permanent magnetic valve core 74 and the valve inlet 72 and the valve core channel 73, and the valve port 70 connects the valve upstream cavity 77 and the downstream cavity 78. When working, the adaptive flow regulating energy-saving pump delivers the medicine 10 to be delivered to the active flow valve inlet 72 and stores it in the valve upstream cavity 77, and the pump control module controls the connecting coil 75 to deliver the medicine to the patient. Specifically, the pump control module passes a positive current to the coil 75, the permanent magnetic valve core 74 slightly moves to the right, the valve port 70 gradually becomes smaller, and finally completely closes, and passes a reverse current to the coil 75, the permanent magnetic valve core 74 slightly moves to the left, the valve port 70 gradually becomes larger, and finally reaches the maximum design valve port. During the opening and closing process of the valve port 70, the coil 75 can be powered off at any time as needed, and the permanent magnetic valve core 74 stops in time under the action of the damping seal ring 79. Furthermore, a bacteria filter (not shown) may be provided at the outlet of the active flow valve 7 (ie, on the outlet pipe 76 ) for filtering bacteria and particulate matter.

[0050] The above is a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An adaptive flow regulating energy-saving pump, characterized in that: It comprises a pump body and a shell covered on the pump body, wherein: The pump body is sealed in the shell with a medicine bag for storing the medicine to be infused, and the pump body and the shell together form a positive pressure sealed space for squeezing the medicine bag to infuse the medicine; The pump body is provided with an infusion liquid inlet and an infusion liquid outlet connected to the medicine bag, a flow regulating bag is provided in the infusion liquid channel corresponding to the infusion liquid outlet, and the pump body is provided with a pressure transmission channel connecting the flow regulating bag and the positive pressure closed space.

2. The adaptive flow regulating energy-saving pump according to claim 1, characterized in that: An annular groove is provided on the side wall of the drug infusion channel at the flow regulating bag, and the flow regulating bag and the annular groove together form a drug dosage regulating port.

3. The adaptive flow regulating energy-saving pump according to claim 2 is characterized in that: The flow regulating bag comprises a straight connecting portion connected to the outlet of the pressure transmission channel and a spherical expanded portion connected to the straight connecting portion and capable of matching with the annular groove.

4. The adaptive flow regulating energy-saving pump according to claim 1, characterized in that: A connecting boss is provided on one side of the pump body close to the medicine bag, and the opening of the medicine bag is sealed and connected to the connecting boss by a low-temperature welding process.

5. The adaptive flow regulating energy-saving pump according to claim 1, characterized in that: The positive pressure closed space is filled with inert gas.

6. The adaptive flow regulating energy-saving pump according to claim 1, characterized in that: A bacterial filter is provided in the infusion liquid channel downstream of the flow regulating capsule.

7. The adaptive flow regulating energy-saving pump according to claim 1, characterized in that: An anti-clogging design is added to the entrance of the pressure transmission channel.

8. An infusion system, characterized in that: It comprises the adaptive flow regulating energy-saving pump as described in any one of claims 1-7, wherein the infusion liquid outlet is connected to a pipeline leading to the patient, and the pipeline is provided with an active flow valve and a pump control module for controlling the connection of the active flow valve.

9. The infusion system according to claim 8, characterized in that The active flow valve comprises a valve body, a valve core channel arranged in the valve body, a permanent magnetic valve core located in the valve core channel, and a coil arranged on a side wall of the valve body corresponding to the valve core channel, wherein: The permanent magnetic valve core is conical, the front end of the permanent magnetic valve core extends into the outlet pipe of the active flow valve, and the tail end of the permanent magnetic valve core is sleeved with a damping sealing ring; The pump control module controls the connection of the coil.

10. The infusion system according to claim 8, characterized in that The outlet of the active flow valve is provided with a bacteria filter.

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