Reusable hydraulic infusion pump
By introducing a reservoir, a volumetric micropump, a drug reservoir, and an venting unit into the hydraulic infusion pump, the problems of non-reusability of the driving fluid and lack of venting function are solved, thereby realizing the recycling of the driving fluid and improving the pumping accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-17
- Publication Date
- 2026-03-20
AI Technical Summary
Existing hydraulic pumps require liquid filling before startup, which means the drive fluid cannot be reused, increasing operating costs. Furthermore, the lack of venting function affects pumping accuracy.
A hydraulic infusion pump was designed, comprising a reservoir, a volumetric micropump, a drug reservoir, and an venting section. The venting section discharges the gas from the volumetric micropump and the drug reservoir, and the driving fluid is recycled through a pipeline system, thus possessing an venting function.
This enables the reuse of the driving fluid, reduces operating costs, and improves the pumping accuracy of the hydraulic pump.
Smart Images
Figure CN224017342U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to hydraulic infusion pump technical field especially relates to a reusable hydraulic infusion pump. BACKGROUND
[0002] Hydraulic infusion pump is a kind of based on volumetric micropump from the liquid reservoir, pumping into the hydraulic liquid reservoir cavity, to push the hydraulic liquid reservoir piston forward, and then push the hydraulic liquid reservoir in the drug cavity liquid pump out.
[0003] Hydraulic infusion pump at the time of factory, volumetric micropump inside is not filled with liquid in advance, so hydraulic infusion pump needs first to complete volumetric micropump and the liquid cavity in the hydraulic drug reservoir of hydraulic liquid filling when starting, existing hydraulic infusion pump utilizes volumetric micropump and drives the liquid in the liquid reservoir to be pumped into the liquid cavity of hydraulic drug reservoir, and then push the piston in the hydraulic drug reservoir forward, finally, the liquid in the hydraulic drug reservoir is pumped into the human body, after volumetric micropump pumps the driving liquid, the driving liquid cannot flow back to the liquid reservoir, so that the driving liquid cannot be reused, so it will make the use cost of user increase, and existing hydraulic infusion pump does not have the function of exhausting, cannot exhaust the excess gas in the volumetric micropump and the liquid cavity of hydraulic drug reservoir, affects the pumping accuracy of hydraulic infusion pump. SUMMARY
[0004] The utility model overcomes the insufficient prior art, provides a kind of reusable hydraulic infusion pump to solve the problems in prior art.
[0005] To achieve the above object, the utility model adopts the technical scheme that a kind of reusable hydraulic infusion pump, comprising
[0006] Liquid reservoir, the driving liquid is loaded in the liquid reservoir, the liquid reservoir one end is liquid outlet, the other end is liquid inlet;
[0007] Volumetric micropump, the volumetric micropump one end imports the driving liquid, and the other end exports the driving liquid;
[0008] Drug reservoir, the movement piston is provided in the drug reservoir, the movement piston separates the drug reservoir into upper cavity and lower cavity, the upper cavity is injected with liquid medicine, the lower cavity is connected with the volumetric micropump, to receive the driving liquid, the lower cavity is connected with the liquid inlet, to import the driving liquid into the liquid reservoir;
[0009] Exhaust part, the exhaust part is located in the lower cavity, and the gas in the volumetric micropump and the lower cavity is exhausted during the driving liquid flow.
[0010] The utility model discloses a preferable embodiment of the utility model, the liquid outlet position of the liquid accumulator is provided with the liquid path switch, when the liquid path switch opens, the drive liquid enters the positive displacement micropump.
[0011] The utility model discloses a preferable embodiment of the utility model, the positive displacement micropump is communicated with the lower cavity through the first pipeline, and the liquid inlet of the liquid accumulator is communicated with the lower cavity through the second pipeline.
[0012] The utility model discloses a preferable embodiment of the utility model, the communication outlet position of the first pipeline and the second pipeline is provided with electromagnetic switch to control the opening and closing of the first pipeline and the second pipeline.
[0013] The utility model discloses a preferable embodiment of the utility model, the injection needle is communicated with the upper cavity through the medicine outlet channel to guide the medicine liquid in the medicine accumulator out.
[0014] The utility model discloses a preferable embodiment of the utility model, the medicine accumulator top is equipped with the medicine adding opening to add the medicine liquid into the upper cavity of the medicine accumulator.
[0015] The utility model discloses a preferable embodiment of the utility model, the medicine adding opening is provided with the self-sealing rubber plug to seal the medicine adding opening.
[0016] The utility model discloses a preferable embodiment of the utility model, the exhaust part includes the exhaust valve and the sealing plug, the exhaust valve is installed in the medicine accumulator bottom to remove the gas in the lower cavity, and the sealing plug is installed in the lower cavity to seal the lower cavity after the exhaust valve is removed.
[0017] The utility model solves the defects in the background art, and has the following beneficial effects:
[0018] The hydraulic infusion pump can recycle the drive liquid, so that the drive liquid can be reused, thereby reducing the use cost of the user, and the hydraulic infusion pump has the exhaust function, can exhaust the excess gas in the positive displacement micropump and the medicine accumulator liquid cavity, and improves the pumping precision of the hydraulic infusion pump. BRIEF DESCRIPTION OF DRAWINGS
[0019] The utility model will be further explained in connection with the drawings and examples;
[0020] Figure 1 It is the whole structure schematic diagram of the utility model embodiment one;
[0021] Figure 2 It is the structure schematic diagram of the utility model embodiment one after drive liquid injection;
[0022] Figure 3It is the whole structure schematic view of the second embodiment of the utility model;
[0023] Figure 4 It is the whole structure schematic view of the third embodiment of the utility model;
[0024] Figure 5 It is the whole structure schematic view of the fourth embodiment of the utility model;
[0025] Figure 6 It is the whole structure schematic view of the fifth embodiment of the utility model;
[0026] In the figure: 10, liquid accumulator; 11, liquid outlet; 12, liquid inlet; 20, positive displacement micropump; 30, medicine accumulator; 31, moving piston; 301, upper cavity; 302, lower cavity; 40, exhaust part; 41, exhaust valve; 42, sealing plug; 50, liquid path switch; 60, first pipeline; 70, second pipeline; 80, electromagnetic switch; 90, injection needle; 100, medicine adding port; 110, self-sealing rubber plug; 120, medical injector. DETAILED DESCRIPTION
[0027] The utility model will be further explained in connection with the drawings and specific embodiments, so that the person skilled in the art can better understand the utility model and can be implemented, but the embodiment is not as the limitation of the utility model.
[0028] Embodiment one
[0029] The embodiment provides a reusable hydraulic infusion pump, which realizes the recycling of driving liquid, enables the repeated use of driving liquid, thereby reducing the use cost of users, and the hydraulic infusion pump has an exhaust function, can exhaust the excess gas in the liquid cavity of the positive displacement micropump 20 and the medicine accumulator 30, and improves the pumping precision of the hydraulic infusion pump.
[0030] In combination Figure 1 With Figure 2 As shown in the figure, the hydraulic infusion pump of the embodiment comprises a liquid accumulator 10, a positive displacement micropump 20, a medicine accumulator 30 and an exhaust part 40, the liquid accumulator 10 stores driving liquid, the driving liquid is introduced into the medicine accumulator 30 through the positive displacement micropump 20, and the liquid medicine in the medicine accumulator 30 is extruded, and the exhaust part 40 can exhaust the excess gas in the positive displacement micropump 20 and the medicine accumulator 30, thereby improving the pumping precision of the liquid medicine.
[0031] In the embodiment, one end of the liquid accumulator 10 is a liquid outlet 11, the other end is a liquid inlet 12, one end of the positive displacement micropump 20 introduces driving liquid, and the other end of the positive displacement micropump 20 is connected with the liquid outlet 11 through a pipeline, so that the driving liquid smoothly enters the positive displacement micropump 20, and the other end of the positive displacement micropump 20 leads out the driving liquid, so that the driving liquid smoothly enters the medicine accumulator 30.
[0032] Further, the medicine reservoir 30 is provided with a moving piston 31, which divides the medicine reservoir 30 into an upper cavity 301 and a lower cavity 302. The upper cavity 301 is filled with the medicine liquid, and the lower cavity 302 is connected with the volumetric micropump 20 to receive the driving liquid. The lower cavity 302 is connected with the liquid inlet 12 to guide the driving liquid into the liquid reservoir 10. The exhaust part 40 is located in the lower cavity 302 to exhaust the gas in the volumetric micropump 20 and the lower cavity 302. When the driving liquid enters the lower cavity 302, the driving liquid gradually fills the lower cavity 302, and in this process, the gas in the volumetric micropump 20 and the lower cavity 302 is exhausted in turn. Then, the driving liquid pushes the moving piston 31, so that the medicine liquid in the upper cavity 301 is pressed and discharged through the injection needle 90.
[0033] Specifically, the exhaust part 40 includes an exhaust valve 41 and a sealing plug 42. The exhaust valve 41 is installed at the bottom of the medicine reservoir 30 to exhaust the gas in the lower cavity 302. The sealing plug 42 is installed in the lower cavity 302 to seal the lower cavity 302 after the exhaust valve 41 is removed. In the process of continuously entering the driving liquid into the lower cavity 302, the gas in the lower cavity 302 is exhausted through the exhaust valve 41. When the gas is completely exhausted, the exhaust valve 41 can be removed, and the position of the exhaust valve 41 is sealed by the sealing plug 42.
[0034] In combination Figure 1 With Figure 2 As shown in the figure, the liquid outlet 11 of the liquid reservoir 10 is provided with a liquid path switch 50. When the liquid path switch 50 is opened, the driving liquid enters the volumetric micropump 20. The volumetric micropump 20 is connected with the lower cavity 302 through the first pipeline 60. The liquid inlet 12 of the liquid reservoir 10 is connected with the lower cavity 302 through the second pipeline 70. The first pipeline 60, the second pipeline 70 and the lower cavity 302 of the embodiment form a three-way structure. The communication outlet position of the first pipeline 60 and the second pipeline 70 is provided with an electromagnetic switch 80 to control the opening and closing of the first pipeline 60 and the second pipeline 70. The electromagnetic switch 80 can control the first pipeline 60 and the second pipeline 70 to be staggered in opening and closing. When the first pipeline 60 is opened, the second pipeline 70 is closed. At this time, the driving liquid enters the lower cavity 302 through the volumetric micropump 20. When the first pipeline 60 is closed, the second pipeline 70 is opened. The driving liquid is recycled into the liquid reservoir 10 to complete the recycling of the driving liquid.
[0035] In this embodiment, the top of the medicine storage container 30 is provided with a medicine inlet 100 to add liquid medicine into the upper cavity 301 of the medicine storage container 30. The medicine inlet 100 is provided with a self-sealing rubber stopper 110 to self-seal the medicine inlet 100. When the liquid medicine in the medicine storage container 30 is used up, the liquid medicine is introduced into the medicine storage container 30 through the medicine inlet 100 to replenish the liquid medicine. When it is necessary to recover the driving fluid, gas or liquid is introduced into the upper cavity 301 through the medicine inlet 100 to push the moving piston 31. At this time, the first pipeline 60 is closed and the second pipeline 70 is open. Therefore, the moving piston 31 will squeeze the driving fluid in the lower cavity 302, so that the driving fluid flows back into the liquid storage container 10 through the second pipeline 70 to complete the recovery and reuse of the driving fluid.
[0036] In this embodiment, the reusable hydraulic infusion pump, after the liquid circuit switch 50 is opened, the driving fluid enters the lower cavity 302 of the drug reservoir 30 via the volumetric micro-pump 20. After the gas is discharged through the exhaust section 40, the driving fluid pushes the moving piston 31. During the movement, the moving piston 31 squeezes the drug solution in the upper cavity 301 and discharges it through the injection needle 90. When it is necessary to recover the driving fluid in the lower cavity 302, gas or liquid is introduced into the upper cavity 301 through the drug inlet 100, pushing the moving piston 31. At this time, the first pipeline 60 is closed and the second pipeline 70 is open. The moving piston 31 will squeeze the driving fluid in the lower cavity 302, causing the driving fluid to flow back to the reservoir 10 through the second pipeline 70, thus completing the recovery and reuse of the driving fluid.
[0037] Example 2
[0038] like Figure 3 As shown, the difference between this embodiment and embodiment one is that the first pipe 60, the second pipe 70 and the lower cavity 302 form a two-way structure, and there are two electromagnetic switches 80, which can control the first pipe 60 and the second pipe 70 respectively. The state of the first pipe 60 and the second pipe 70 can be switched as needed. This simplifies the three-way structure in embodiment one, making it easier to install and reducing costs.
[0039] Example 3
[0040] like Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that the medical syringe 120 is placed in the upper cavity 301 of the drug reservoir 30. When the moving piston 31 moves, the medical syringe 120 is put into operation through the syringe push rod. The medical syringe 120 can be used after it has absorbed the drug solution. Its advantage is that only one medical syringe 120 needs to be replaced when infusing again, which makes the reuse rate higher and reduces costs.
[0041] Example 4
[0042] like Figure 5 As shown, this embodiment is a combination of Embodiment 2 and Embodiment 3. After the medical syringe 120 is used, gas or liquid is introduced into the medical syringe 120, which can cause the driving fluid to flow back into the reservoir 10, thus completing the recycling of the driving fluid.
[0043] Example 5
[0044] like Figure 6 As shown, compared with Embodiment 1, in the initial state of this embodiment, the lower cavity 302 of the drug reservoir 30 is filled with driving fluid, and the liquid reservoir 10 (liquid bag) is kept in a flattened state (ensuring that there is no excess air inside). The first pipeline 60 is closed and the second pipeline 70 is opened. When the user adds medicine, the moving piston 31 is pushed, so that the driving fluid in the liquid chamber is forced back into the liquid reservoir 10 (liquid bag). At this time, the electromagnetic switch 80 is pressed to open the first pipeline 60 and close the second pipeline 70. The flow channels of the volumetric micropump 20 and the liquid chamber of the drug reservoir 30 are opened, and the liquid circuit switch 50 is turned on to enter the self-starting program. During this process, the exhaust section 40 discharges the excess gas in the volumetric micropump 20.
[0045] In this embodiment, in order to cope with storage in a frozen environment, an insulation layer is added to the outside of the first pipeline 60 and the second pipeline 70 to ensure that the driving fluid in the lower cavity 302 will freeze first when freezing, and when the volume increases, some of the driving fluid can be returned to the reservoir 10 (liquid bag) in advance and then frozen.
[0046] The advantage of this embodiment is that it allows for flexible control of the required dosage of the infusion solution, eliminating the need to fill the drug chamber each time, thus facilitating user use and reducing user costs.
[0047] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.
Claims
1. A reusable hydraulic infusion pump, characterized in that, include A reservoir (10) is filled with driving fluid. One end of the reservoir (10) is an outlet (11) and the other end is an inlet (12). A volumetric micropump (20) is provided, wherein the driving fluid is introduced into one end of the volumetric micropump (20) and discharged from the other end; A drug reservoir (30) is provided with a moving piston (31) inside the drug reservoir (30). The moving piston (31) divides the inside of the drug reservoir (30) into an upper cavity (301) and a lower cavity (302). The upper cavity (301) is filled with liquid medicine. The lower cavity (302) is connected to the volumetric micropump (20) to receive the driving liquid. The lower cavity (302) is connected to the inlet (12) to introduce the driving liquid into the liquid reservoir (10). An exhaust section (40) is located in the lower cavity (302) and discharges the gas from the volumetric micropump (20) and the lower cavity (302) during the flow of the driving fluid.
2. The reusable hydraulic infusion pump according to claim 1, characterized in that, A liquid circuit switch (50) is provided at the outlet (11) of the liquid reservoir (10). When the liquid circuit switch (50) is opened, the driving liquid enters the volumetric micropump (20).
3. A reusable hydraulic infusion pump according to claim 1, characterized in that, The volumetric micropump (20) is connected to the lower cavity (302) through the first pipeline (60), and the inlet (12) of the liquid reservoir (10) is connected to the lower cavity (302) through the second pipeline (70).
4. A reusable hydraulic infusion pump according to claim 3, characterized in that, An electromagnetic switch (80) is provided at the connection outlet of the first pipeline (60) and the second pipeline (70) to control the opening and closing of the first pipeline (60) and the second pipeline (70).
5. A reusable hydraulic infusion pump according to claim 1, characterized in that, The top of the drug reservoir (30) is provided with an injection needle (90), which is connected to the upper cavity (301) through a drug outlet channel to export the drug liquid in the drug reservoir (30).
6. A reusable hydraulic infusion pump according to claim 1, characterized in that, The top of the medicine storage device (30) is provided with a medicine inlet (100) to add the medicine liquid into the upper cavity (301) of the medicine storage device (30).
7. A reusable hydraulic infusion pump according to claim 6, characterized in that, The dosing port (100) is provided with a self-sealing rubber stopper (110) to self-seal the dosing port (100).
8. A reusable hydraulic infusion pump according to claim 1, characterized in that, The exhaust section (40) includes an exhaust valve (41) and a sealing plug (42). The exhaust valve (41) is installed at the bottom of the medicine reservoir (30) to exhaust the gas in the lower cavity (302). The sealing plug (42) is installed in the lower cavity (302) to seal the lower cavity (302) after the exhaust valve (41) is removed.