Exhaust assembly and hydraulic infusion pump system

Abstract

The utility model relates to an exhaust assembly and a hydraulic infusion pump system, which are applied to the technical field of medical instruments and solve the problem that when an existing hydraulic infusion pump is used, a positive displacement pump is started, gas in the positive displacement pump, a connecting pipeline and a cavity can be squeezed in the cavity to form bubbles, and the output accuracy of the hydraulic infusion pump is affected. Comprising a medicine storage device, a liquid driving device, a volume micropump, a controller, an exhaust assembly and a circulation channel, the exhaust assembly comprises a shell, an exhaust needle and an exhaust part, an exhaust channel communicated with the circulation channel is formed in the shell, the exhaust part is arranged in the exhaust channel, and the exhaust part comprises a sealing plug and an exhaust film provided with micropores; the exhaust film has the air-permeable but liquid-impermeable capacity, an exhaust hole is formed in the sealing plug, and the air outlet end of the exhaust hole is communicated with the exhaust channel. Under the action that the exhaust film and the exhaust needle pierce the sealing plug, double sealing is achieved, the sealing performance of the hydraulic infusion pump system is improved, and the infusion precision of the hydraulic infusion pump system is improved.

Description

Technical Field

[0001] The utility model is applied in the technical field of medical equipment, and particularly relates to an exhaust component and a hydraulic infusion pump system. Background Art

[0002] Hydraulic infusion pump system: a system that uses a volumetric micropump (to suck out hydraulic liquid from a hydraulic reservoir) to pump hydraulic liquid (using the incompressible nature of the liquid) into the chamber of the hydraulic medicine reservoir, thereby pushing a piston (or a rubber plug) to push the liquid medicine in the chamber out. The hydraulic infusion pump system includes a hydraulic liquid reservoir, a volumetric micropump and a hydraulic medicine reservoir; the existing hydraulic infusion pump system has the following problems when working: when the hydraulic infusion pump system leaves the factory, gas is stored in the volumetric pump, connecting pipes and chambers. When the hydraulic infusion pump is used, the volumetric pump is started, and the gas in the volumetric pump, connecting pipes and chambers will be squeezed into the chamber to form bubbles, affecting the output accuracy of the hydraulic infusion pump. Therefore, in order to solve the existing problems, it is necessary to provide an exhaust component that cooperates with the hydraulic delivery pump system to discharge the gas in the hydraulic delivery pump system and improve the output accuracy of the hydraulic infusion pump system. Utility Model Content

[0003] The utility model aims to provide an exhaust component and a hydraulic infusion pump system, which solves the problem that when the existing hydraulic infusion pump is in use, the volume pump is started, and the gas in the volume pump, connecting pipelines, and chambers will be squeezed into the chamber to form bubbles, affecting the output accuracy of the hydraulic infusion pump.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] The utility model provides an exhaust component, comprising an outer shell and an exhaust duct located in the outer shell and having an opening at one end, and also comprising an exhaust needle and an exhaust member, wherein the exhaust member is arranged in the open end of the exhaust duct, the air inlet end of the exhaust needle extends through the outer shell into the exhaust duct, the exhaust member comprises a sealing plug and an exhaust membrane arranged on the sealing plug, micropores are arranged on the exhaust membrane, the exhaust membrane provided with the micropores is air-permeable but liquid-impermeable, exhaust holes are arranged at positions on the sealing plug corresponding to the micropores, and the air outlet ends of the exhaust holes are connected to the exhaust duct.

[0006] Furthermore, the sealing plug is slidably disposed in the exhaust passage, the exhaust needle is disposed opposite to the sealing plug, and the sealing plug slidably disposed in the exhaust passage is used to allow the exhaust needle to be inserted into the sealing plug to achieve blocking of the exhaust needle.

[0007] Further, the exhaust passage extends along its axial direction in a direction away from the exhaust member to the outer end surface of the shell, and an exhaust needle base is provided at one end of the exhaust passage away from the exhaust member, and the exhaust needle is provided on the exhaust needle base.

[0008] Furthermore, the exhaust film is arranged on an outer surface of the sealing plug on one side close to the opening end.

[0009] Furthermore, the exhaust needle base is detachably arranged in the exhaust duct.

[0010] Furthermore, a first limiting step surface and a second limiting step surface are respectively provided on the inner wall of the exhaust duct, and the first limiting step surface and the second limiting step surface are sequentially distributed from left to right along the axial direction of the exhaust duct. The first limiting step surface is used to limit the position of the exhaust needle base in the exhaust duct, and the second limiting step surface is used to limit the position of the exhaust component in the exhaust duct.

[0011] Furthermore, the side surface of the exhaust needle base close to the exhaust component is a pushing surface for resisting the exhaust component.

[0012] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0013] The utility model provides an exhaust assembly, including a housing and an exhaust passage located in the housing and having one end open, and also including an exhaust needle and an exhaust member, wherein the exhaust member is arranged in the open end of the exhaust passage, the air inlet end of the exhaust needle extends through the housing into the exhaust passage, the exhaust member includes a sealing plug and an exhaust membrane arranged on the sealing plug, micropores are arranged on the exhaust membrane, the exhaust membrane with micropores is air permeable but liquid impermeable, exhaust holes are arranged at positions corresponding to the micropores on the sealing plug, and the exhaust ends of the exhaust holes are connected to the exhaust passage. The exhaust assembly of this structure is simple in structure, convenient for processing and manufacturing, and is air permeable but liquid impermeable.

[0014] Furthermore, by sliding the exhaust assembly in the exhaust passage, when the driving liquid contacts the exhaust membrane after the exhaust is completed, the driving liquid pushes the exhaust membrane and the sealing plug to move toward the exhaust needle, so that the exhaust needle is inserted into (but not penetrated) the sealing plug to achieve complete sealing of the exhaust needle. Therefore, after the exhaust is completed, double sealing is achieved through the exhaust membrane and the exhaust needle piercing the sealing plug, thereby improving the sealing performance of the secondary hydraulic infusion pump system.

[0015] The utility model further provides a hydraulic infusion pump system, comprising a drug reservoir, a driving fluid device, a volumetric micropump and a controller, and also comprising an exhaust component, the exhaust component comprising a shell, an exhaust needle and an exhaust member, the drug reservoir, the driving fluid device, the volumetric micropump and the controller are all arranged in the shell, a circulation channel connecting the liquid outlet end of the volumetric micropump and the liquid inlet end of the drug reservoir is arranged in the shell, an exhaust channel connected to the circulation channel is also arranged in the shell, the exhaust member is arranged inside one end of the exhaust channel connecting the circulation channel, the exhaust member comprises a sealing plug and an exhaust membrane arranged on the sealing plug, micropores are arranged on the exhaust membrane, the exhaust membrane provided with the micropores has the ability to be air-permeable but liquid-impermeable, exhaust holes are arranged at positions corresponding to the micropores on the sealing plug, the outlet end of the exhaust hole is connected to the exhaust channel, and the air inlet end of the exhaust needle extends through the shell to the exhaust channel.

[0016] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0017] The utility model discloses a hydraulic infusion pump system, in which an exhaust component is arranged. When the driving liquid contacts the exhaust component, since the exhaust membrane provided with micropores is permeable to air but impermeable to liquid, the exhaust component can realize automatic sealing of the liquid without external control. Therefore, when using the infusion device, the gas in the driving liquid device is first discharged, and then the driving liquid is pumped into the medicine storage device, which can improve the output accuracy of the hydraulic infusion pump system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0019] Figure 1 It is a sectional view of the overall structure of a hydraulic infusion pump system provided with an exhaust assembly in a preferred embodiment of the utility model;

[0020] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0021] Figure 3 yes Figure 2 Schematic diagram of the explosion structure;

[0022] Figure 4 It is a schematic diagram of the structure of the exhaust membrane in the preferred embodiment of the utility model;

[0023] Figure 5 yes Figure 4 A partial enlarged view of the .

[0024] The reference numerals are described as follows:

[0025] 1. Shell; 2. Exhaust duct; 3. Exhaust needle; 4. Exhaust member; 41. Sealing plug; 42. Exhaust membrane; 43. Micropore; 44. Exhaust hole; 5. Drug reservoir; 6. Driving liquid device; 7. Volumetric micropump; 8. Controller; 9. Flow channel; 10. Exhaust needle base; 11. First limit step surface; 12. Second limit step surface. DETAILED DESCRIPTION

[0026] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the quartz tube processing auxiliary back cover assembly or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0029] refer to Figure 1 , Figure 2 and Figure 3 , which is an exhaust component provided by the utility model and is used in conjunction with a hydraulic infusion pump system.

[0030] Among them, reference Figure 3 , Figure 4 and Figure 5The exhaust assembly includes a housing 1 and an exhaust passage 2 located in the housing 1 and having one end opened, and also includes an exhaust needle 3 and an exhaust member 4. The exhaust member 4 is arranged in the open end of the exhaust passage 2. The air inlet end of the exhaust needle 3 extends through the housing 1 into the exhaust passage 2. The exhaust member 4 includes a sealing plug 41 and an exhaust membrane 42 arranged on the sealing plug 41. The sealing plug 41 is a rubber plug. The exhaust membrane 42 is provided with micropores 43. The exhaust membrane 42 provided with micropores 43 is air-permeable but liquid-impermeable. Exhaust holes 44 are arranged at positions corresponding to the micropores 43 on the sealing plug 41. The exhaust end of the exhaust hole 44 is connected to the exhaust passage 2. The exhaust assembly of this structure is simple in structure, convenient for processing and manufacturing, and is air-permeable but liquid-impermeable.

[0031] Among them, the exhaust membrane 42 can be arranged on the outer surface of one side of the sealing plug 41 close to the opening end, or the exhaust membrane 42 can be arranged on the outer surface of the other side of the sealing plug 41 away from the opening end, or the exhaust membrane 42 can be arranged on both ends of the sealing plug; in this example, the exhaust membrane 42 is arranged on the outer surface of one side of the sealing plug 41 close to the opening end, which is the optimal implementation scheme. While ensuring that the exhaust component can be normally exhausted and liquid-tight, compared with the solution in which the exhaust membrane 42 is arranged on both ends of the sealing plug 41, the use of the exhaust membrane 42 can be reduced and the cost can be saved; compared with the solution in which the exhaust membrane 42 is arranged on the outer surface of one side of the sealing plug 41 away from the opening end, the driving liquid can be prevented from entering the exhaust hole 44 during the process of the hydraulic infusion pump system pumping out the driving liquid.

[0032] refer to Figure 1 and Figure 2 The hydraulic infusion pump system includes a drug reservoir 5, a driving fluid device 6, a volumetric micropump 7 and a controller 8, and also includes this exhaust component. The drug reservoir 5, the driving fluid device 6, the volumetric micropump 7 and the controller 8 are all arranged in a shell 1. A circulation channel 9 connecting the liquid outlet end of the volumetric micropump 7 and the liquid inlet end of the drug reservoir 5 is arranged in the shell 1. The exhaust channel 2 is provided with an end of the exhaust member 4 connected to the circulation channel 9.

[0033] refer to Figure 1 , Figure 3 and Figure 5When the exhaust assembly is used in conjunction with the hydraulic infusion pump system, before the volumetric micropump 7 is started, the gas in the driving fluid device 6 is exhausted through the exhaust assembly through the exhaust procedure, that is, the volumetric micropump 7 is first turned on to allow the volumetric micropump 7 to exhaust all the gas in the driving fluid device 6 according to the set time (the set time is 30s); thereafter, the driving liquid in the driving fluid device is pumped into the drug reservoir 5 by the volumetric micropump 7. When the driving liquid contacts the exhaust assembly, since the exhaust membrane 42 provided with micropores 43 has the ability to be permeable to air but impermeable to liquid, the exhaust assembly can achieve automatic sealing of the liquid without external control. Therefore, when using the infusion device, the gas in the driving fluid device 6 is first exhausted and then the driving liquid is pumped into the drug reservoir 5. The output accuracy of the hydraulic infusion pump system can be improved. In the exhaust process, the piston in the drug reservoir 5 will move downward a certain distance under the action of the gas, but in this example, the exhaust assembly is focused on protecting.

[0034] refer to Figure 2 , Figure 3 and Figure 5 , the sealing plug 41 is slidably arranged in the exhaust passage 2, the exhaust needle 3 is arranged opposite to the sealing plug 41, and the sealing plug 41 slidably arranged in the exhaust passage 2 is used to make the exhaust needle 3 inserted in the sealing plug 41 to achieve the blocking of the exhaust needle 3. By sliding the exhaust assembly in the exhaust passage 2, when the driving liquid contacts the exhaust membrane 42 after the exhaust is completed, the driving liquid pushes the exhaust membrane 42 and the sealing plug 41 to move in the direction close to the exhaust needle 3, so that the exhaust needle 3 is inserted in (but not penetrated) the sealing plug 41 to achieve the complete sealing of the exhaust needle 3. Therefore, after the exhaust is completed, the exhaust membrane 42 and the exhaust needle 3 are inserted into the sealing plug 41 to achieve double sealing, thereby improving the sealing performance of the hydraulic infusion pump system. In this example, the axial line of the exhaust needle 3 and the transverse center line of the sealing plug 41 are located on the same horizontal straight line, so that the exhaust needle 3 is better rolled in the sealing plug 41 and the air inlet end of the exhaust needle 3 is better blocked.

[0035] refer to Figure 2 and Figure 3, the exhaust passage 2 extends to the outer end surface of the housing 1 along its axial direction in the direction away from the exhaust member 4, and an exhaust needle base 10 is provided at one end of the exhaust passage 2 away from the exhaust member 4, and the exhaust needle 3 is arranged on the exhaust needle base 10, and the exhaust needle base 10 is detachably arranged in the exhaust passage 2. The exhaust needle base 10 is provided to facilitate the installation of the exhaust needle 3 in the housing 1, and at the same time, when the exhaust needle 3 is blocked or damaged, it is also convenient to disassemble and replace the exhaust needle 3; in addition, it is also convenient to install the exhaust assembly in the housing 1. The side of the exhaust needle base 10 close to the exhaust member 4 is a push surface for resisting the exhaust member 4. When the sealing plug 41 moves in the direction close to the exhaust needle 3 so that the exhaust needle 3 is inserted in the sealing plug 41, the push surface pushes the sealing plug 41 and increases the tightness of the fit with the sealing plug 41, and the exhaust needle 3 is prevented from piercing the sealing plug 41 by pushing the sealing plug 41.

[0036] refer to Figure 2 and Figure 3 The inner wall of the exhaust passage 2 is provided with a first limiting step surface 11 and a second limiting step surface 12, which are sequentially distributed from left to right along the axial direction of the exhaust passage 2. The first limiting step surface 11 is used to limit the position of the exhaust needle base 10 in the exhaust passage 2, and the second limiting step surface 12 is used to limit the position of the exhaust member 4 in the exhaust passage 2. When the exhaust assembly is installed in the housing 1, the first limiting step surface 11 and the second limiting step surface 12 can limit and fix the exhaust needle base 10 and the exhaust member 4, thereby improving the installation accuracy and firmness.

[0037] In summary: by using the exhaust component in conjunction with the hydraulic infusion pump system, when the hydraulic infusion pump system is working, the gas in the hydraulic infusion pump system can be first exhausted through the exhaust component. Since the exhaust membrane 42 provided with micropores 43 is permeable to air but impermeable to liquid, the function of automatically sealing the liquid after exhaust can be realized, thereby improving the infusion accuracy of the hydraulic infusion pump system; further, by sliding the exhaust component in the exhaust channel 2, when the driving liquid contacts the exhaust membrane 42 after the exhaust is completed, the driving liquid pushes the exhaust membrane 42 and the sealing plug 41 to move in the direction close to the exhaust needle 3, so that the exhaust needle 3 is pierced in (but not penetrated) the sealing plug 41 to achieve a thorough sealing of the exhaust needle 3. Therefore, in the process of exhaust, double sealing is achieved through the exhaust membrane 43 and the exhaust needle 3 piercing the sealing plug 41, thereby improving the sealing performance.

[0038] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. An exhaust assembly, characterized in that: The invention comprises a housing (1) and an exhaust passage (2) located in the housing (1) and having one end open, and also comprises an exhaust needle (3) and an exhaust member (4), wherein the exhaust member (4) is arranged in the open end of the exhaust passage (2), and an air inlet end of the exhaust needle (3) extends through the housing (1) into the exhaust passage (2), and the exhaust member (4) comprises a sealing plug (41) and an exhaust membrane (42) arranged on the sealing plug (41), wherein micropores (43) are arranged on the exhaust membrane (42), and the exhaust membrane (42) provided with the micropores (43) is permeable to air but impermeable to liquid, and exhaust holes (44) are arranged at positions on the sealing plug (41) corresponding to the micropores (43), and an exhaust outlet end of the exhaust hole (44) is connected to the exhaust passage (2).

2. The exhaust assembly according to claim 1, characterized in that The sealing plug (41) is slidably arranged in the exhaust passage (2); the exhaust needle (3) and the sealing plug (41) are arranged opposite to each other; the sealing plug (41) slidably arranged in the exhaust passage (2) is used to allow the exhaust needle (3) to be inserted into the sealing plug (41) to achieve blocking of the exhaust needle (3).

3. The exhaust assembly according to claim 1 or 2, characterized in that: The exhaust duct (2) extends along its axial direction in a direction away from the exhaust member (4) to the outer end surface of the housing (1); an exhaust needle base (10) is provided at one end of the exhaust duct (2) away from the exhaust member (4); and the exhaust needle (3) is provided on the exhaust needle base (10).

4. The exhaust assembly according to claim 3, characterized in that The exhaust film (42) is arranged on an outer surface of one side of the sealing plug (41) close to the opening end.

5. The exhaust assembly according to claim 4, characterized in that The exhaust needle base (10) is detachably arranged in the exhaust passage (2).

6. The exhaust assembly according to claim 5, characterized in that A first limiting step surface (11) and a second limiting step surface (12) are respectively provided on the inner wall of the exhaust duct (2); the first limiting step surface (11) and the second limiting step surface (12) are sequentially distributed from left to right along the axial direction of the exhaust duct (2); the first limiting step surface (11) is used to limit the position of the exhaust needle base (10) in the exhaust duct (2), and the second limiting step surface (12) is used to limit the position of the exhaust component (4) in the exhaust duct (2).

7. The exhaust assembly according to any one of claims 4 to 6, characterized in that: The side surface of the exhaust needle base (10) close to the exhaust member (4) is a push surface used to resist the exhaust member (4).

8. A hydraulic infusion pump system, comprising a drug reservoir (5), a driving fluid device (6), a positive displacement micro pump (7) and a controller (8), characterized in that: The device also comprises an exhaust assembly, the exhaust assembly comprising a housing (1), an exhaust needle (3) and an exhaust member (4); the drug reservoir (5), the driving liquid device (6), the volumetric micropump (7) and the controller (8) are all arranged in the housing (1); a circulation channel (9) communicating with the liquid outlet of the volumetric micropump (7) and the liquid inlet of the drug reservoir (5) is arranged in the housing (1); an exhaust channel (2) communicating with the circulation channel (9) is also arranged in the housing (1); and the exhaust member (4) is arranged at a position where the exhaust channel (2) communicates with the circulation channel (9). Inside one end, the exhaust member (4) comprises a sealing plug (41) and an exhaust membrane (42) arranged on the sealing plug (41), the exhaust membrane (42) being provided with micropores (43), the exhaust membrane (42) being provided with the micropores (43) being air-permeable but liquid-impermeable, exhaust holes (44) being provided at positions on the sealing plug (41) corresponding to the micropores (43), the exhaust holes (44) being in communication with the exhaust duct (2), and the exhaust inlet end of the exhaust needle (3) extending through the housing (1) into the exhaust duct (2).

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