Hydraulic infusion pump and auxiliary device

Abstract

The utility model discloses a hydraulic infusion pump and an auxiliary device, which comprise a pump body, a micro pump, a liquid storage device and a medicine storage device which are sequentially connected are arranged in the pump body, driving liquid is filled in the liquid storage device, and the micro pump pressurizes and pushes the driving liquid in the liquid storage device into the medicine storage device so as to pump out medicine liquid in the medicine storage device; the infusion part is located outside the pump body, the infusion part is detachably connected with the medicine outlet end of the medicine storage device, and the infusion part is used for guiding out medicine liquid. According to the hydraulic infusion pump, the split type structural design is adopted, the infusion piece can be rapidly replaced, the situation that the pump body of the hydraulic infusion pump and the infusion piece are scrapped together is avoided, cost is reduced, the first clamping groove and the second clamping groove are formed in the shell of the auxiliary device, a fool-proof mechanism of the hydraulic infusion pump is formed, and the auxiliary device is convenient to use. The pressing sequence of the keys of the hydraulic infusion pump is unique, and misoperation is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic infusion pump technology, and particularly relates to a hydraulic infusion pump and auxiliary device. Background Technology

[0002] A hydraulic infusion pump is an infusion pump that uses a positive displacement micro-pump to draw hydraulic fluid from a drug reservoir, pump it into the liquid chamber of the hydraulic drug reservoir, push the piston of the hydraulic drug reservoir forward, and then pump the drug fluid out of the drug chamber of the hydraulic drug reservoir.

[0003] The existing hydraulic infusion pumps have the following problems in actual use:

[0004] 1. The infusion needle inserted into the human body by the hydraulic infusion pump is integrated into the hydraulic infusion pump. When the hydraulic infusion pump is working for a long time, the existing infusion needle has a service life of about three days. Due to the limited service life of the infusion needle, it needs to be replaced after about three days of use. Under the integrated design, the infusion needle cannot be replaced. If it is scrapped and replaced along with the hydraulic infusion pump, it would be wasteful for the operator. If it is not replaced and is used until the pumping ends, it may cause infection of the skin at the infusion needle site or even endanger the operator's personal safety.

[0005] 2. During operation, the infusion needle of the hydraulic infusion pump is connected to the human body. The pressure inside the human body will generate a large negative pressure on the piston of the hydraulic medicine reservoir, which will cause the liquid in the hydraulic medicine reservoir to tend to flow back into the volumetric micropump. If this state is maintained for a long time, it will cause the pumping capacity of the volumetric micropump to decrease or even damage the volumetric micropump, affecting the pumping accuracy.

[0006] 3. Before pumping, the hydraulic infusion pump needs to be vented to remove excess gas from the flow channels inside the volumetric micropump and the bottom cover of the hydraulic medicine reservoir. However, in actual use, the operator may remove the vent valve before starting to pump, which will result in the internal gas not being completely expelled and large air bubbles appearing in the liquid chamber. These air bubbles can be compressed, which will affect the pumping accuracy of the volumetric micropump. Utility Model Content

[0007] This utility model overcomes the shortcomings of the prior art by providing a hydraulic infusion pump and auxiliary device to solve the problems existing in the prior art.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is: a hydraulic infusion pump, comprising...

[0009] The pump body is equipped with a micro pump, a liquid reservoir, and a drug reservoir connected in sequence. The liquid reservoir is filled with driving fluid. The micro pump pressurizes the driving fluid in the liquid reservoir and pushes it into the drug reservoir to pump out the drug solution in the drug reservoir.

[0010] An infusion unit is located outside the pump body and is detachably connected to the drug outlet of the drug reservoir, the infusion unit dispensing the drug solution.

[0011] In a preferred embodiment of this utility model, the liquid reservoir includes a liquid bag, a connecting pipe, and a liquid circuit switch. The liquid bag contains driving fluid, and the connecting pipe is connected to the inside of the liquid bag. When the liquid circuit switch is opened, the connecting pipe discharges the driving fluid located in the liquid bag.

[0012] In a preferred embodiment of the present invention, the infusion device includes an infusion conduit, an infusion patch, and an infusion needle. The infusion conduit is connected to the drug reservoir, the infusion patch is mounted on the infusion conduit, and the infusion needle is mounted on the end of the infusion conduit.

[0013] In a preferred embodiment of this utility model, the infusion pipeline and the medicine storage device are connected by a Luer thread.

[0014] In a preferred embodiment of this invention, a hydraulic-electric switch is provided on the pump body for overall control.

[0015] In a preferred embodiment of this utility model, a one-way valve and a sealing plug are provided at the bottom of the medicine reservoir. The driving fluid enters the medicine reservoir through the one-way valve, and the sealing plug seals the bottom of the medicine reservoir.

[0016] This utility model also discloses an auxiliary device, including

[0017] The housing is sleeved with the pump body. The housing is provided with a first slot and a second slot. The first slot engages the electrohydraulic switch, and the second slot engages the infusion needle.

[0018] An exhaust section is located inside the housing and corresponds to the bottom of the medicine reservoir. The exhaust section penetrates the sealing plug to discharge the gas inside the medicine reservoir.

[0019] In a preferred embodiment of this utility model, a positioning bead is provided on the housing to position and install the pump body inside the housing.

[0020] In a preferred embodiment of the present invention, a fixing base is further included, wherein the fixing base mounts the housing and the housing is connected to the fixing base.

[0021] In a preferred embodiment of this utility model, the venting part includes a venting needle and a waterproof and breathable membrane. The venting needle is fixedly installed on the fixing base. When the housing is continuously pressed down, the venting needle penetrates the sealing plug and the gas in the medicine reservoir is discharged through the venting needle. The waterproof and breathable membrane is located at the venting end of the venting needle to discharge the gas and keep it waterproof.

[0022] This utility model solves the defects existing in the background technology, and has the following beneficial effects:

[0023] 1. The hydraulic infusion pump of this utility model adopts a split structure design, which can quickly replace the infusion components, so as to avoid the pump body and infusion components of the hydraulic infusion pump being scrapped together, thereby reducing costs.

[0024] 2. This utility model has a one-way valve at the bottom of the medicine storage device, which can effectively prevent the backflow of the driving fluid and keep the pumping volume of the driving fluid in a stable state, thereby ensuring the pumping accuracy of the micro pump.

[0025] 3. The auxiliary device of this utility model has a first slot and a second slot on its housing, which form a foolproof mechanism for the hydraulic pump, making the pressing sequence of each button of the hydraulic pump unique and avoiding misoperation.

[0026] 4. The presence of the exhaust section in the auxiliary device of this utility model can stably discharge the gas in the medicine storage container. After the gas is discharged, no air bubbles will appear in the liquid cavity, so it will not affect the pumping accuracy of the micro pump and is conducive to the precise pumping of the micro pump. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0028] Figure 1 This is a schematic diagram of the hydraulic infusion pump and auxiliary device in a preferred embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the liquid reservoir according to a preferred embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the internal structure of the medicine storage device according to a preferred embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the infusion device according to a preferred embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the auxiliary device according to a preferred embodiment of the present invention;

[0033] Figure 6This is a cross-sectional view of the exhaust section location in a preferred embodiment of the present invention;

[0034] Figure 7 This is an exploded view of the connection between the drug storage device and the infusion pipeline in a preferred embodiment of this utility model;

[0035] In the diagram: 10. Pump body; 12. Liquid reservoir; 121. Liquid bag; 122. Connecting pipeline; 123. Liquid circuit switch; 13. Drug reservoir; 20. Infusion component; 21. Infusion pipeline; 22. Infusion patch; 23. Infusion needle; 30. Hydraulic-electric switch; 40. Check valve; 50. Sealing plug; 60. Housing; 61. First slot; 62. Second slot; 70. Vent; 71. Vent needle; 72. Waterproof and breathable membrane; 80. Positioning bead; 90. Fixing base. Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0037] Example 1

[0038] This embodiment provides a hydraulic infusion pump with a split structure design, which allows for quick replacement of the infusion component 20, thus avoiding the situation where the pump body 10 and the infusion component 20 are scrapped together, thereby reducing costs.

[0039] Combination Figures 1 to 4 As shown, the hydraulic infusion pump of this embodiment includes a pump body 10 and an infusion component 20. The pump body 10 stores the liquid medicine and pressurizes the liquid medicine so that the liquid medicine is discharged through the infusion component 20.

[0040] In this embodiment, the pump body 10 is provided with a micro pump (not shown in the figure), a reservoir 12 and a drug reservoir 13 connected in sequence. The reservoir 12 is filled with driving fluid. The micro pump pressurizes the driving fluid in the reservoir 12 and pushes it into the drug reservoir 13 to pump out the drug solution in the drug reservoir 13. In this embodiment, the micro pump, the reservoir 12 and the drug reservoir 13 are connected in sequence by pipelines. The pump body 10 is provided with a hydraulic switch 30. When the hydraulic switch 30 is pressed, the micro pump pressurizes the driving fluid in the reservoir 12, so that the driving fluid enters the bottom cavity of the drug reservoir 13. A piston is provided in the bottom cavity of the drug reservoir 13. After the driving fluid is filled into the bottom cavity, the piston moves upward, thereby pumping out the drug solution in the drug reservoir 13 to the infusion unit 20.

[0041] Combination Figure 1 and Figure 3As shown, the bottom of the drug reservoir 13 in this embodiment is provided with a one-way valve 40 and a sealing plug 50. The driving fluid enters the drug reservoir 13 through the one-way valve 40, and the sealing plug 50 seals the bottom of the drug reservoir 13. The presence of the one-way valve 40 can effectively prevent the driving fluid from flowing back, so that the pumping volume of the driving fluid is kept stable, thereby ensuring the pumping accuracy of the micro pump. The sealing plug 50 seals the bottom of the drug reservoir 13 to prevent the driving fluid from leaking out.

[0042] Combination Figure 1 and Figure 4 As shown, in this embodiment, the infusion unit 20 is located outside the pump body 10, and the infusion unit 20 is detachably connected to the drug outlet end of the drug reservoir 13. The infusion unit 20 delivers the liquid medicine. The infusion unit 20 includes an infusion pipe 21, an infusion patch 22, and an infusion needle 23. The infusion pipe 21 is connected to the drug reservoir 13. The infusion patch 22 is installed on the infusion pipe 21, and the infusion needle 23 is installed at the end of the infusion pipe 21. When the liquid medicine is pumped out from the drug reservoir 13, it is injected through the infusion pipe 21 and the infusion needle 23. The presence of the infusion patch 22 allows the infusion unit 20 to be attached to the human body, thereby avoiding the user holding the infusion unit 20 in their hand, making the operation more convenient. The pump body 10 is also provided with a patch to attach the hydraulic infusion pump.

[0043] In this embodiment, as Figure 7 As shown, the infusion pipe 21 is connected to the medicine reservoir 13 by a Luer thread to achieve a detachable connection between the infusion component 20 and the medicine reservoir 13. In actual use, the Luer thread connection can be replaced by a snap-fit ​​connection or other detachable connections.

[0044] Furthermore, when adding medicine to the medicine reservoir 13, the medicine enters the medicine reservoir 13 from the inlet. When the medicine emerges from the needle position of the infusion needle 23, it indicates that the medicine addition operation has been completed.

[0045] Combination Figure 1 and Figure 2 As shown, the liquid reservoir 12 in this embodiment includes a liquid bag 121, a connecting pipe 122, and a liquid circuit switch 123. The liquid bag 121 is filled with driving fluid, and the connecting pipe 122 is connected to the inside of the liquid bag 121. When the liquid circuit switch 123 is opened, the connecting pipe 122 discharges the driving fluid located in the liquid bag 121. In this embodiment, the liquid bag 121 is made of composite membrane material by hot pressing, and the connecting pipe 122 is a flexible hose. When the micro pump is started, the liquid circuit switch 123 is opened, so that the driving fluid is discharged from the liquid bag 121 and enters the bottom cavity of the drug reservoir 13 through the flexible hose.

[0046] In actual use, the hydraulic infusion pump of this embodiment pressurizes the driving fluid in the reservoir 12 by a micro pump, so that the driving fluid enters the bottom cavity of the drug reservoir 13, and then the drug is pumped out by the piston in the drug reservoir 13. The pumped drug is discharged through the infusion device 20.

[0047] Example 2

[0048] This embodiment provides an auxiliary device that forms a foolproof mechanism for the hydraulic infusion pump, ensuring that the pressing sequence of each button on the hydraulic infusion pump is unique, thus avoiding misoperation. It also stably discharges the gas in the medicine reservoir 13, and no air bubbles appear in the liquid chamber after the gas is discharged, so it does not affect the pumping accuracy of the micro pump and is beneficial for the micro pump to perform precise pumping.

[0049] Combination Figure 1 , Figure 5 as well as Figure 6 As shown, the auxiliary device in this embodiment includes a housing 60 and an exhaust section 70. The housing 60 is sleeved with the pump body 10. The housing 60 is provided with a first slot 61 and a second slot 62. The first slot 61 engages the hydraulic-electric switch 30, and the second slot 62 engages the infusion needle 23. The first slot 61 and the second slot 62 form a foolproof mechanism for the hydraulic infusion pump, which can effectively prevent misoperation of the hydraulic infusion pump.

[0050] In this embodiment, a positioning bead 80 is provided on the housing 60 to position and install the pump body 10 inside the housing 60. The positioning bead 80 can further position the pump body 10 and improve the stability of the pump body 10 inside the housing 60.

[0051] Combination Figure 5 and Figure 6 As shown, in this embodiment, the venting section 70 is located inside the housing 60 and corresponds to the bottom position of the medicine reservoir 13. The venting section 70 penetrates the sealing plug 50 to discharge the gas inside the medicine reservoir 13. The venting section 70 includes an venting needle 71 and a waterproof and breathable membrane 72. The venting needle 71 is fixedly installed on the fixing base 90. When the housing 60 is continuously pressed down, the venting needle 71 penetrates the sealing plug 50, and the gas inside the medicine reservoir 13 is discharged through the venting needle 71. The waterproof and breathable membrane 72 is located at the venting end of the venting needle 71 to discharge the gas and keep it waterproof. During the continuous installation of the hydraulic infusion pump, the venting needle 71 punctures the sealing plug 50. Therefore, after the driving fluid enters the bottom cavity of the medicine reservoir 13, the gas will be discharged through the venting needle 71 until the gas is completely discharged. Then the driving fluid is blocked by the waterproof and breathable membrane 72, and the driving fluid continues to enter the bottom cavity of the medicine reservoir 13 to pump out the medicine inside the medicine reservoir 13.

[0052] In this embodiment, the auxiliary device also includes a fixing base 90, which mounts the housing 60 and connects the housing 60 to the fixing base 90. In this embodiment, the housing 60 and the fixing base 90 are integrally formed or bonded together. The fixing base 90 can support and fix the housing 60 and facilitates the installation of the hydraulic pump.

[0053] In practical use, the auxiliary device of this embodiment has a first slot 61 and a second slot 62 on the housing 60, which forms a foolproof mechanism for the hydraulic infusion pump. This makes the pressing sequence of each button on the hydraulic infusion pump unique, avoiding misoperation. The presence of the vent 70 can stably discharge the gas in the medicine reservoir 13. After the gas is discharged, no air bubbles will appear in the liquid chamber, so it will not affect the pumping accuracy of the micro pump, which is beneficial for the micro pump to perform precise pumping.

[0054] 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 hydraulic infusion pump, characterized in that, include Pump body (10), wherein a micro pump, a liquid reservoir (12) and a drug reservoir (13) are connected in sequence inside the pump body (10). The liquid reservoir (12) is filled with driving fluid. The micro pump pressurizes the driving fluid in the liquid reservoir (12) and pushes it into the drug reservoir (13) to pump out the drug liquid in the drug reservoir (13). Infusion unit (20) is located outside the pump body (10) and is detachably connected to the drug outlet of the drug reservoir (13). The infusion unit (20) delivers the drug solution.

2. A hydraulic infusion pump according to claim 1, characterized in that, The liquid reservoir (12) includes a liquid bag (121), a connecting pipe (122), and a liquid circuit switch (123). The liquid bag (121) contains driving fluid, and the connecting pipe (122) is connected to the inside of the liquid bag (121). When the liquid circuit switch (123) is opened, the connecting pipe (122) discharges the driving fluid located in the liquid bag (121).

3. A hydraulic infusion pump according to claim 1, characterized in that, The infusion unit (20) includes an infusion pipe (21), an infusion patch (22), and an infusion needle (23). The infusion pipe (21) is connected to the drug reservoir (13), the infusion patch (22) is installed on the infusion pipe (21), and the infusion needle (23) is installed at the end of the infusion pipe (21).

4. A hydraulic infusion pump according to claim 3, characterized in that, The infusion pipe (21) is connected to the medicine storage container (13) by a Luer thread.

5. A hydraulic infusion pump according to claim 1, characterized in that, The pump body (10) is equipped with a hydraulic-electric switch (30) for overall control.

6. A hydraulic infusion pump according to claim 1, characterized in that, The bottom of the medicine reservoir (13) is provided with a one-way valve (40) and a sealing plug (50). The driving fluid enters the medicine reservoir (13) through the one-way valve (40), and the sealing plug (50) seals the bottom of the medicine reservoir (13).

7. An auxiliary device applied to a hydraulic infusion pump according to any one of claims 1-6, characterized in that, include The housing (60) is sleeved with the pump body (10). The housing (60) is provided with a first slot (61) and a second slot (62). The first slot (61) engages the electro-hydraulic switch (30), and the second slot (62) engages the infusion needle (23). The exhaust section (70) is located inside the housing (60) and corresponds to the bottom position of the medicine reservoir (13). The exhaust section (70) penetrates the sealing plug (50) to discharge the gas inside the medicine reservoir (13).

8. An auxiliary device according to claim 7, characterized in that, The housing (60) is provided with a positioning bead (80) to position and install the pump body (10) inside the housing (60).

9. An auxiliary device according to claim 7, characterized in that, It also includes a mounting base (90) for mounting the housing (60), and the housing (60) is connected to the mounting base (90).

10. An auxiliary device according to claim 9, characterized in that, The venting section (70) includes a venting needle (71) and a waterproof and breathable membrane (72). The venting needle (71) is fixedly installed on the fixing base (90). When the housing (60) is continuously pressed down, the venting needle (71) penetrates the sealing plug (50) and the gas in the medicine reservoir (13) is discharged through the venting needle (71). The waterproof and breathable membrane (72) is located at the venting end of the venting needle (71) to discharge the gas and keep it waterproof.

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