CN113368722B - Medical liquid medicine mixing and conveying device - Google Patents
Medical liquid medicine mixing and conveying device Download PDFInfo
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- CN113368722B CN113368722B CN202110782640.2A CN202110782640A CN113368722B CN 113368722 B CN113368722 B CN 113368722B CN 202110782640 A CN202110782640 A CN 202110782640A CN 113368722 B CN113368722 B CN 113368722B
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Abstract
The invention discloses a medical liquid medicine mixing and conveying device which comprises a liquid medicine input pipe, a first middle conveying pipe, a positive and negative pressure pump and a liquid mixing pipe, wherein the positive and negative pressure pump comprises a positive and negative pressure driving piece, a cover body and a shell, and the cover body is communicated with a second liquid medicine input pipe and a second middle conveying pipe through a communication port; a venturi is arranged between the cover body and the shell and is communicated with the third liquid medicine input pipe; two ends of the first middle conveying pipe are respectively communicated with the first liquid medicine input pipe and the liquid mixing pipe; an infusion branch pipe is arranged on the first middle conveying pipe and communicated with the shell; a conveying switch is arranged between the first middle conveying pipe and the liquid mixing pipe; a check valve is arranged between the third liquid medicine input pipe and the venturi; and check valves are arranged between the second liquid medicine input pipe, the second middle conveying pipe and the cover body. This medical liquid medicine mixing conveyor can mix multiple liquid medicine together and carry, has advantages such as work efficiency is high, mix effectually.
Description
Technical Field
The invention relates to the field of medicine mixing, in particular to a medical liquid medicine mixing and conveying device.
Background
When the liquid medicine is treated, different liquid medicines are mixed to achieve different drug effects. For example, in departments such as a clinical laboratory, an injection department, and a laboratory, a large amount of liquid medicines need to be prepared and mixed every day (for example, three different liquid medicines are mixed), but a liquid medicine mixing device is not available at present, and generally, liquid medicines are directly mixed manually and then conveyed to a specific place, so that the defects of low working efficiency, time and labor waste, high labor intensity and poor mixing effect exist.
For this reason, it is necessary to provide a device capable of automatically mixing liquid medicine.
Disclosure of Invention
The present invention is directed to overcome the above problems and to provide a medical liquid mixing and delivering device.
The purpose of the invention is realized by the following technical scheme:
a medical liquid medicine mixing and conveying device comprises a liquid medicine input pipe, a first middle conveying pipe, a positive and negative pressure pump and a liquid mixing pipe, wherein the liquid medicine input pipe comprises a first liquid medicine input pipe, a second liquid medicine input pipe and a third liquid medicine input pipe; the positive and negative pressure pump comprises a positive and negative pressure driving piece, a cover body and a shell, wherein the positive and negative pressure driving piece is movably arranged in the shell; the cover body is provided with two communicating ports, one communicating port is communicated with the second liquid medicine input pipe, and the other communicating port is connected to the liquid mixing pipe through a second middle conveying pipe; a venturi tube is arranged between the cover body and the shell and is communicated with the third liquid medicine input pipe; two ends of the first middle conveying pipe are respectively communicated with the outlet of the first liquid medicine input pipe and the inlet of the liquid mixing pipe; an infusion branch pipe is arranged on the first middle conveying pipe and communicated with the shell; a conveying switch is arranged between the first middle conveying pipe and the liquid mixing pipe; a first check valve is arranged between the third liquid medicine input pipe and the venturi; the second liquid medicine input pipe and the second middle delivery pipe are respectively communicated with the corresponding communication ports of the cover body through a second check valve and a third check valve.
The working principle of the medical liquid medicine mixing and conveying device is as follows:
when the liquid mixing device works, the first liquid medicine is conveyed into the first middle conveying pipe through the first liquid medicine input pipe, then the conveying switch is turned on, the first liquid medicine input pipe is conveyed forwards into the liquid mixing pipe, and at the moment, a negative water impact effect is generated in the first middle conveying pipe, namely, negative pressure is generated in an inner cavity of the first middle conveying pipe. Wherein, because the infusion of first middle conveyer pipe is in charge of and is linked together with the casing respectively, under the effect of negative pressure, positive and negative pressure driving piece in the casing can be toward the direction removal of being close to first middle conveyer pipe, meanwhile, regard positive and negative pressure driving piece as the border, is close to the sealed chamber between lid, the venturi tube and produces the negative pressure to in sucking the second liquid medicine into piston pump and venturi tube through second liquid medicine input tube.
Further, when the second liquid medicine passes through the venturi tube at a certain speed, negative pressure is generated in the venturi tube, so that the third liquid medicine is sucked into the venturi tube through the third liquid medicine input tube, and the second liquid medicine and the third liquid medicine are mixed. After opening the uniform time, trun into the state of closing with transport switch, produce positive water impact effect this moment in first middle conveyer pipe, make the pressure increase suddenly in the conveyer pipe in the middle of the first, during first liquid medicine divides the pipe to get into the casing through the infusion, promote positive and negative pressure driving piece and remove towards the direction that is close to the lid, thereby drive second liquid medicine and third liquid medicine from transferring to the conveyer pipe in the middle of the second in the sealed chamber, then transfer to in mixing the liquid pipe, mix with first liquid medicine, form even mixed liquid medicine. The above operations are continuously circulated by controlling the opening and closing of the delivery switch, thereby continuously delivering the mixed liquid medicine forward.
In the mixing process, the conveying switch is controlled to be opened and closed periodically, so that not only can three different liquid medicines be driven to be mixed, but also the mixing amount of the three different liquid medicines can be accurately controlled. In addition, the second liquid medicine passes through the venturi tube to enable the inner cavity to generate negative pressure, so that the third liquid medicine enters the sealed cavity to be mixed with the second liquid medicine, then enters the liquid mixing pipe and is mixed with the first liquid medicine to form uniform mixed liquid medicine with a determined proportion, and the stability of the feeding system is improved.
In a preferred embodiment of the present invention, a conveying step for limiting the positive and negative pressure driving member is provided at both one end of the inner cavity of the housing close to the first intermediate conveying pipe and one end of the inner cavity of the venturi close to the housing.
Preferably, the height of the conveying step is L, L =0.1D to 0.3D, D is the inner cavity diameter of the shell.
Preferably, one side of the conveying step platform close to the first middle conveying pipe is provided with a tapered section, and the tapered angle theta of the tapered section 2 ，θ 2 ＝15°-45°。
In a preferred embodiment of the present invention, the diameter of the communication port is D 1 ，D 1 And (D) =0.3 (D-2L) to 0.4 (D-2L), wherein D is the diameter of the inner cavity of the shell, and L is the height of the conveying step platform.
In a preferable aspect of the present invention, a liquid mixing branch pipe is provided on the liquid mixing pipe, and the second intermediate delivery pipe is communicated with the liquid mixing pipe through the liquid mixing branch pipe;
the axial line of the liquid mixing branch pipe is vertical to the axial line of the liquid mixing pipe.
Compared with the prior art, the invention has the following beneficial effects:
the medical liquid medicine mixing and conveying device utilizes the pressure difference generated by the water impact effect as the driving force, not only can uniformly mix a plurality of liquid medicines together, but also does not need other additional driving devices, has a very ingenious structure, can simplify other related structures, and reduces the manufacturing cost.
Drawings
Fig. 1 is a front view of the medical fluid mixing and delivery device of the present invention.
Fig. 2-3 are cross-sectional views of the medical fluid mixing and delivery device of the present invention.
FIG. 4 is a cross-sectional view of a positive and negative pressure pump of the present invention.
Detailed Description
In order to make those skilled in the art understand the technical solutions of the present invention well, the following description of the present invention is provided with reference to the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
Referring to fig. 1-3, the medical liquid mixing and delivering device in the present embodiment includes a liquid input tube including a first liquid input tube 3, a second liquid input tube 4 and a third liquid input tube 5, a first intermediate delivery tube 1, a positive and negative pressure pump and a liquid mixing tube 2; the positive and negative pressure pump comprises a positive and negative pressure driving piece 6, a cover body 7 and a shell body 8, wherein the positive and negative pressure driving piece 6 is movably arranged in the shell body 8; the cover body 7 is provided with two communicating ports 7-1, one communicating port 7-1 is communicated with the second liquid medicine input pipe 4, and the other communicating port 7-1 is connected to the liquid mixing pipe 2 through a second middle conveying pipe 9; a venturi tube 10 is arranged between the cover body 7 and the shell body 8, and the venturi tube 10 is communicated with the third liquid medicine input pipe 5; wherein the reducing angle of the reducing and expanding section of the venturi tube 10 is theta 3 ，θ 3 =15-45 °; the divergent angle of the divergent section of the venturi 10 is theta 4 ，θ 4 ＝15°-45°。
Two ends of the first middle conveying pipe 1 are respectively communicated with an outlet of the first liquid medicine input pipe 3 and an inlet of the liquid mixing pipe 2; the first middle conveying pipe 1 is provided with an infusion branch pipe 11, and the infusion branch pipe 11 is communicated with the shell 8; a conveying switch 12 is arranged between the first middle conveying pipe 1 and the liquid mixing pipe 2, and specifically, the conveying switch 12 is an electromagnetic valve; a first check valve 13 is arranged between the third liquid medicine input pipe 5 and the venturi 10; the second liquid medicine input pipe 4 and the second intermediate delivery pipe 9 are respectively communicated with the communication port 7-1 corresponding to the cover body 7 through a second check valve 14 and a third check valve 15. The first check valve 13 can be opened only in the direction from the third chemical liquid input pipe 5 to the venturi 10, the second check valve 14 can be opened only in the direction from the second chemical liquid input pipe 4 to the corresponding communication port 7-1, and the third check valve 15 can be opened only in the direction from the corresponding communication port 7-1 to the second intermediate delivery pipe 9.
Referring to fig. 4, a conveying step for limiting the positive and negative pressure driving member 6 is arranged at one end of the inner cavity of the housing 8 close to the first intermediate conveying pipe 1 and one end of the inner cavity of the venturi 10 close to the housing 8.
Further, the height of the conveying step is L, L =0.1D to 0.3D, and D is the inner cavity diameter of the shell 8.
Further, one side of the conveying step platform, which is close to the first middle conveying pipe 1, is provided with a tapered section, and the tapered angle theta of the tapered section 2 ，θ 2 ＝15°-45°。
Further, the diameter of the communication port 7-1 is D 1 ，D 1 And (D) =0.3 (D-2L) to 0.4 (D-2L), wherein D is the inner cavity diameter of the shell 8, and L is the height of the conveying step.
Referring to fig. 1-3, a liquid mixing branch pipe 16 is arranged on the liquid mixing pipe 2, and the second intermediate delivery pipe 9 is communicated with the liquid mixing pipe 2 through the liquid mixing branch pipe 16; the axis of the liquid mixing branch pipe 16 is vertical to the axis of the liquid mixing pipe 2.
Referring to fig. 1 to 3, the working principle of the medical liquid mixing and delivering device in the embodiment is as follows:
when the liquid mixing device works, first liquid medicine is conveyed to the first intermediate conveying pipe 1 through the first liquid medicine input pipe 3 (the first intermediate conveying pipe 1 is connected with a device for providing conveying power), then the conveying switch 12 is opened, the first liquid medicine input pipe 3 is conveyed forwards to the liquid mixing pipe 2, and at the moment, a negative water impact effect is generated in the first intermediate conveying pipe 1, namely, negative pressure is generated in an inner cavity of the first intermediate conveying pipe 1. Because the transfusion branch pipes 11 of the first intermediate delivery pipe 1 are respectively communicated with the shell 8, the positive and negative pressure driving piece 6 in the shell 8 can move towards the direction close to the first intermediate delivery pipe 1 under the action of negative pressure, meanwhile, the positive and negative pressure driving piece 6 is used as a boundary, and negative pressure is generated near a sealing cavity between the cover body 7 and the venturi tube 10, so that the second liquid medicine is sucked into the piston pump and the venturi tube 10 through the second liquid medicine input pipe 4.
Further, when the second medical fluid passes through the venturi 10 at a certain speed, a negative pressure is generated in the venturi 10, so that the third medical fluid is drawn into the venturi 10 through the third medical fluid input pipe 5, so that the second medical fluid and the third medical fluid are mixed, as shown in fig. 2. After the liquid mixing device is opened for a certain time, the conveying switch 12 is turned to be in a closed state, and at the moment, a positive water impact effect is generated in the first middle conveying pipe 1, so that the pressure in the first middle conveying pipe 1 is suddenly increased, the first liquid medicine enters the shell 8 through the infusion branch pipe 11, the positive and negative pressure driving piece 6 is pushed to move towards the direction close to the cover body 7, the second liquid medicine and the third liquid medicine are driven to be transferred to the second middle conveying pipe 9 from the sealed cavity and then transferred to the liquid mixing pipe 2 to be mixed with the first liquid medicine, and uniform mixed liquid medicine is formed, as shown in fig. 3. The above operation is continuously circulated by controlling the opening and closing of the delivery switch 12, thereby continuously delivering the mixed liquid medicine forward.
The present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.
Claims (6)
1. A medical liquid medicine mixing and conveying device is characterized by comprising a liquid medicine input pipe, a first middle conveying pipe, a positive and negative pressure pump and a liquid mixing pipe, wherein the liquid medicine input pipe comprises a first liquid medicine input pipe, a second liquid medicine input pipe and a third liquid medicine input pipe; the positive and negative pressure pump comprises a positive and negative pressure driving piece, a cover body and a shell, wherein the positive and negative pressure driving piece is movably arranged in the shell; the cover body is provided with two communicating ports, one communicating port is communicated with the second liquid medicine input pipe, and the other communicating port is connected to the liquid mixing pipe through a second middle conveying pipe; a venturi is arranged between the cover body and the shell and is communicated with the third liquid medicine input pipe; two ends of the first middle conveying pipe are respectively communicated with the outlet of the first liquid medicine input pipe and the inlet of the liquid mixing pipe; the first middle conveying pipe is provided with an infusion branch pipe which is communicated with the shell; a conveying switch is arranged between the first middle conveying pipe and the liquid mixing pipe; a first check valve is arranged between the third liquid medicine input pipe and the venturi; the second liquid medicine input pipe and the second middle delivery pipe are respectively communicated with the corresponding communication ports of the cover body through a second check valve and a third check valve.
2. The medical fluid mixing and delivering device of claim 1, wherein the end of the inner chamber of the housing near the first intermediate delivery tube and the end of the inner chamber of the venturi tube near the housing are provided with a delivery step for limiting the positive and negative pressure driving member.
3. A medical fluid mixing and delivery device according to claim 2, wherein said delivery step has a height L, L =0.1D to 0.3D, D being the diameter of the lumen of the housing.
4. The medical fluid mixing and delivery device according to claim 2, wherein the delivery step is provided with a tapered section on a side thereof adjacent to the first intermediate delivery tube, the tapered section having a taper angle θ 2 ，θ 2 ＝15°-45°。
5. The medical-fluid mixing and delivering device according to claim 3, wherein the diameter of the communication port is D 1 ，D 1 And (D) =0.3 (D-2L) to 0.4 (D-2L).
6. The medical liquid mixing and delivering device according to any one of claims 1 to 5, wherein a liquid mixing branch pipe is provided on the liquid mixing pipe, and the second intermediate delivery pipe is communicated with the liquid mixing pipe through the liquid mixing branch pipe; the axial line of the liquid mixing branch pipe is vertical to the axial line of the liquid mixing pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110782640.2A CN113368722B (en) | 2021-07-11 | 2021-07-11 | Medical liquid medicine mixing and conveying device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110782640.2A CN113368722B (en) | 2021-07-11 | 2021-07-11 | Medical liquid medicine mixing and conveying device |
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| CN113368722A CN113368722A (en) | 2021-09-10 |
| CN113368722B true CN113368722B (en) | 2022-11-29 |
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| CN107007958A (en) * | 2017-06-06 | 2017-08-04 | 明光浩淼安防科技股份公司 | A kind of novel foam fire fighting truck and foam supply and conveying device |
| CN211411804U (en) * | 2019-12-12 | 2020-09-04 | 天津艾达威科技有限公司 | Clinical laboratory uses liquid medicine mixing arrangement |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4104898B2 (en) * | 2002-04-30 | 2008-06-18 | 株式会社プロデュース | Chemical supply system |
| US10252229B2 (en) * | 2017-06-30 | 2019-04-09 | Snowie LLC | System comprising a pump attached to a tank casing for mixing a fluid |
| CN109490058B (en) * | 2018-11-16 | 2021-04-20 | 南京爱思唯志生物科技有限公司 | Microfluidic system and method suitable for liquid mixing |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4147478A (en) * | 1977-09-22 | 1979-04-03 | Graco Inc. | Secondary pump feed apparatus |
| EP1150105A2 (en) * | 2000-04-28 | 2001-10-31 | Eppendorf Ag | Microdosing system with gas cushion |
| CN105107108A (en) * | 2015-07-31 | 2015-12-02 | 成都煦华节能科技有限公司 | Compound mixed proportional valve |
| CN107007958A (en) * | 2017-06-06 | 2017-08-04 | 明光浩淼安防科技股份公司 | A kind of novel foam fire fighting truck and foam supply and conveying device |
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| CN113368722A (en) | 2021-09-10 |
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Inventor after: Zhang Qin Inventor after: Zhang Siping Inventor before: Zhang Siping |
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Effective date of registration: 20221111 Address after: Department of Cardiology, Zigong First People's Hospital, No. 42, Shangyihao First Branch Road, Ziliujing District, Zigong, Sichuan 643000 Applicant after: Zhang Qin Address before: 510000 Chang ban Xi San Jie, Tianhe District, Guangzhou City, Guangdong Province Applicant before: Zhang Siping |
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