CN113368722B - Medical liquid medicine mixing and conveying device - Google Patents

Abstract

The invention discloses a medical liquid mixing and conveying device, which includes a liquid medicine input pipe, a first intermediate conveying pipe, a positive and negative pressure pump and a liquid mixing pipe, and the positive and negative pressure pump includes a positive and negative pressure driving part, a cover body and a casing , the cover communicates with the second liquid medicine input pipe and the second intermediate delivery pipe through the communication port; a venturi tube is arranged between the cover body and the housing, and the venturi tube communicates with the third liquid medicine input pipe The two ends of the first intermediate delivery pipe are respectively connected with the first liquid medicine input pipe and the liquid mixing pipe; the first intermediate delivery pipe is provided with an infusion branch, and the infusion branch is connected with the housing; the first middle A delivery switch is provided between the delivery pipe and the liquid mixing pipe; a check valve is provided between the third liquid medicine input pipe and the Venturi tube; There is a non-return valve between. The medical liquid mixing and conveying device can mix and transport various medicinal liquids, and has the advantages of high working efficiency, good mixing effect and the like.

Description

A medical liquid mixing delivery device

technical field

The invention relates to the field of drug mixing, in particular to a medical liquid mixing and delivery device.

Background technique

When processing the liquid medicine, it is necessary to mix different liquid medicines to achieve different medicinal effects. For example, in departments such as hospital laboratory department, injection department, and laboratory department, a large amount of liquid medicine needs to be prepared and mixed every day (for example, three different medicine liquids are mixed), but there is no liquid medicine mixing device at present. It is to directly mix the liquid medicine manually and then transport it to a specific place, which has the disadvantages of low work efficiency, time-consuming, labor-intensive, and poor mixing effect.

For this reason, it is necessary to provide a device capable of automatically mixing medicinal liquids.

Contents of the invention

The object of the present invention is to overcome the above-mentioned existing problems and provide a medical liquid mixing delivery device.

The object of the present invention is achieved through the following technical solutions:

A medical liquid mixing delivery device, comprising a liquid medicine input tube, a first intermediate delivery tube, a positive and negative pressure pump, and a liquid mixing tube, the liquid medicine input tube includes a first liquid medicine input tube, a second liquid medicine input tube and a The third medical liquid input pipe; the positive and negative pressure pump includes a positive and negative pressure driving part, a cover body and a housing, and the positive and negative pressure driving part is movably arranged in the housing; the cover body is provided with two One of the communication ports is connected to the second liquid medicine input pipe, and the other communication port is connected to the liquid mixing pipe through the second intermediate delivery pipe; a Venturi tube is arranged between the cover and the housing, and the Venturi tube The tube communicates with the third liquid medicine input pipe; the two ends of the first intermediate transport pipe communicate with the outlet of the first liquid medicine input pipe and the inlet of the liquid mixing pipe respectively; the first intermediate transport pipe is provided with an infusion branch pipe, The infusion branch pipe communicates with the housing; a delivery switch is provided between the first intermediate delivery pipe and the liquid mixing pipe; a first check valve is provided between the third liquid medicine input pipe and the Venturi tube; The second liquid medicine input pipe and the second intermediate conveying pipe communicate with the corresponding communication port of the cover through the second check valve and the third check valve respectively.

The working principle of the above-mentioned medical liquid mixing delivery device is as follows:

When working, the first liquid medicine is delivered to the first intermediate delivery pipe through the first liquid medicine input pipe, and then the delivery switch is turned on, and the first liquid medicine input pipe is forwardly transported to the liquid mixing pipe. A negative water impact effect is generated in the delivery pipe, ie a negative pressure is generated in the interior of the first intermediate delivery pipe. Wherein, since the infusion branch pipes of the first intermediate conveying pipe are respectively connected with the housing, under the action of negative pressure, the positive and negative pressure driving parts in the housing will move towards the direction close to the first intermediate conveying pipe. The positive and negative pressure driving parts are used as the boundary, and negative pressure is generated near the sealing cavity between the cover body and the venturi tube, so that the second liquid medicine is sucked into the piston pump and the venturi tube through the second liquid medicine input pipe.

Further, when the second liquid medicine passes through the Venturi tube at a certain speed, a 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 pipe, so that the second liquid medicine and the first liquid medicine Mix the three liquid medicines. After opening for a certain period of time, turn the transfer switch to the closed state, and at this time, a positive water impact effect is generated in the first intermediate transfer pipe, causing the pressure in the first intermediate transfer pipe to suddenly increase, and the first medicinal liquid enters through the infusion branch pipe In the casing, push the positive and negative pressure driving member to move towards the cover body, thereby driving the second liquid medicine and the third liquid medicine to transfer from the sealed cavity to the second intermediate delivery pipe, and then to the liquid mixing pipe, and The first medicinal liquid is mixed to form a uniform mixed medicinal liquid. By controlling the opening and closing of the delivery switch, the above operations are continuously cycled, so that the mixed medicinal solution is continuously delivered forward.

During the above mixing process, by periodically controlling the delivery switch to open and close, not only can the three different medicinal liquids be driven to mix, but also the mixing amount of the three different medicinal liquids can be precisely controlled. In addition, the second liquid passes through the Venturi tube to generate negative pressure in the inner cavity, so that the third liquid enters the sealed cavity and mixes with the second liquid, and then enters the mixing tube and mixes with the first liquid to form a ratio Determined homogeneous mixing of liquid medicine, thereby improving the stability of the feeding system.

In a preferred solution of the present invention, wherein, the end of the inner cavity of the housing close to the first intermediate conveying pipe and the end of the inner cavity of the Venturi tube close to the housing are provided with conveying valves for limiting positive and negative pressure driving parts. Ladder.

Preferably, the height of the delivery step is L, L=0.1D to 0.3D, and D is the diameter of the inner cavity of the housing.

Preferably, a tapered section is provided on the side of the delivery step near the first intermediate delivery pipe, and the tapered section has a tapering angle θ ₂ , θ ₂ =15°-45°.

A preferred solution of the present invention, wherein, the diameter of the communication port is D ₁ , D ₁ =0.3(D-2L) to 0.4(D-2L), D is the diameter of the inner cavity of the housing, L is the delivery step the height of.

In a preferred solution of the present invention, the liquid mixing pipe is provided with a liquid mixing pipe, and the second intermediate delivery pipe communicates with the liquid mixing pipe through the liquid mixing pipe;

The axis of the liquid mixing branch is perpendicular to the axis of the liquid mixing tube.

Compared with the prior art, the present invention has the following beneficial effects:

The medical liquid mixing and conveying device in the present invention uses the pressure difference generated by the impact effect of water as the driving force, not only can mix various liquids evenly, but also does not need other additional driving devices, the structure is very ingenious, and other The relevant structure reduces the manufacturing cost.

Description of drawings

Fig. 1 is a front view of the medical liquid mixing delivery device in the present invention.

2-3 are cross-sectional views of the medical liquid mixing and delivery device of the present invention.

Fig. 4 is a sectional view of the positive and negative pressure pump in the present invention.

Detailed ways

In order for those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described below in conjunction with the examples and accompanying drawings, but the embodiments of the present invention are not limited thereto.

Referring to Figures 1-3, the medical liquid mixing delivery device in this embodiment includes a liquid medicine input pipe, a first intermediate delivery pipe 1, a positive and negative pressure pump, and a liquid mixing pipe 2, and the liquid medicine input pipe includes a first medicine liquid input pipe. liquid input pipe 3, the second liquid medicine input pipe 4 and the third liquid medicine input pipe 5; the positive and negative pressure pump includes a positive and negative pressure driver 6, a cover 7 and a housing 8, and the positive and negative pressure driver 6 is movably arranged in the housing 8; the cover 7 is provided with two communication ports 7-1, one of which is in communication with the second liquid medicine input tube 4, and the other communication port 7- 1 is connected to the liquid mixing pipe 2 through the second intermediate delivery pipe 9; a venturi tube 10 is provided between the cover body 7 and the housing 8, and the venturi tube 10 communicates with the third liquid medicine input pipe 5; wherein, The tapering angle of the shrinking and expanding section of the Venturi tube 10 is θ ₃ , θ ₃ =15-45°; the tapering angle of the expanding section of the Venturi tube 10 is θ ₄ , θ ₄ =15°- 45°.

Both ends of the first intermediate delivery pipe 1 communicate with the outlet of the first medicinal liquid input pipe 3 and the inlet of the mixed liquid pipe 2 respectively; the first intermediate delivery pipe 1 is provided with an infusion branch 11, which is connected to the The housing 8 is in communication; a delivery switch 12 is provided between the first intermediate delivery pipe 1 and the mixing pipe 2, specifically, the delivery switch 12 is a solenoid valve; the third liquid medicine input pipe 5 is connected to the venturi tube 10 is provided with a first check valve 13; the second liquid medicine input pipe 4 and the second intermediate delivery pipe 9 communicate with the cover body 7 through the second check valve 14 and the third check valve 15 respectively. Port 7-1 is connected. Wherein, the first check valve 13 can only be opened in the direction of the third liquid medicine input pipe 5 toward the venturi tube 10, and the second check valve 14 can only be opened in the direction of the second liquid medicine input pipe 4 toward the corresponding The direction of the communication port 7-1 is opened, and the third check valve 15 can only be opened in the direction of the corresponding communication port 7-1 toward the second intermediate delivery pipe 9 .

Referring to Fig. 4 , the end of the inner cavity of the housing 8 close to the first intermediate delivery pipe 1 and the end of the inner cavity of the venturi tube 10 close to the housing 8 are provided with a delivery mechanism for limiting the positive and negative pressure driving member 6 . Ladder.

Further, the height of the conveying step is L, L=0.1D to 0.3D, and D is the inner cavity diameter of the housing 8 .

Further, a tapered section is provided on the side of the delivery step near the first intermediate delivery pipe 1 , and the tapered section has a tapering angle θ ₂ , θ ₂ =15°-45°.

Further, the diameter of the communication port 7-1 is D ₁ , D ₁ =0.3(D-2L) to 0.4(D-2L), D is the diameter of the inner cavity of the housing 8, and L is the height of the delivery step.

Referring to Fig. 1-3, the liquid mixing pipe 2 is provided with a liquid mixing pipe 16, and the second intermediate conveying pipe 9 communicates with the liquid mixing pipe 2 through the liquid mixing pipe 16; The axis is vertical.

Referring to Figures 1-3, the working principle of the medical liquid mixing delivery device in this embodiment is:

During work, the first medicinal liquid is delivered to the first intermediate delivery pipe 1 (the first intermediate delivery pipe 1 is connected to the device providing power for delivery) through the first medicinal liquid input pipe 3, then the delivery switch 12 is turned on, and the first intermediate delivery pipe 1 is opened. The liquid medicine input tube 3 is transported forward to the liquid mixing tube 2 , at this time, a negative water shock effect is generated in the first intermediate transport tube 1 , that is, a negative pressure is generated in the lumen of the first intermediate transport tube 1 . Wherein, since the infusion sub-pipes 11 of the first intermediate delivery pipe 1 communicate with the housing 8 respectively, under the action of negative pressure, the positive and negative pressure driving parts 6 in the housing 8 will move towards the direction close to the first intermediate delivery pipe 1 , at the same time, with the positive and negative pressure driving member 6 as the boundary, a negative pressure is generated in the sealed cavity close to the cover body 7 and the venturi tube 10, so that the second liquid medicine is sucked into the piston through the second liquid medicine input pipe 4 pump and venturi 10.

Further, when the second liquid medicine passes through the Venturi tube 10 at a certain speed, a negative pressure is generated in the Venturi tube 10, so that the third liquid medicine is sucked into the Venturi tube 10 through the third liquid medicine input pipe 5, so that the first liquid medicine The second medicinal liquid is mixed with the third medicinal liquid, as shown in Figure 2. After being turned on for a certain period of time, the delivery switch 12 is turned to the closed state. At this time, a positive water impact effect is generated in the first intermediate delivery pipe 1, so that the pressure in the first intermediate delivery pipe 1 suddenly increases, and the first medicinal liquid Enter the casing 8 through the infusion branch 11, push the positive and negative pressure driving member 6 to move towards the cover 7, thereby driving the second medical liquid and the third medical liquid to transfer from the sealed cavity to the second intermediate delivery tube 9 , and then transferred to the mixing tube 2, and mixed with the first medicinal solution to form a uniform mixed medicinal solution, as shown in Figure 3. By controlling the opening and closing of the delivery switch 12, the above operations are continuously cycled, so that the mixed medicinal solution is continuously delivered forward.

The above is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above content, and any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention, All should be equivalent replacement methods, and all are included in the protection scope of the present invention.

Claims (6)

1. A medical liquid medicine mixing delivery device, characterized in that it comprises a liquid medicine input pipe, a first intermediate conveying pipe, a positive and negative pressure pump and a liquid mixing pipe, and said liquid medicine input pipe comprises a first liquid medicine input pipe, a second Two liquid medicine input pipes and a third liquid medicine input pipe; the positive and negative pressure pump includes positive and negative pressure driving parts, a cover and a housing, and the positive and negative pressure driving parts are movably arranged in the housing; the cover There are two communication ports on the body, one of which is connected to the second liquid medicine input pipe, and the other communication port is connected to the liquid mixing pipe through the second intermediate delivery pipe; The Venturi tube communicates with the third liquid medicine input pipe; the two ends of the first intermediate delivery pipe communicate with the outlet of the first liquid medicine input pipe and the inlet of the liquid mixing pipe respectively; the first intermediate delivery pipe There is an infusion sub-pipe on the top, and the infusion sub-pipe communicates with the housing; a delivery switch is provided between the first intermediate delivery tube and the liquid mixing tube; a first inverter is provided between the third liquid medicine input tube and the Venturi tube. Stop valve; the second liquid medicine input pipe and the second intermediate delivery pipe communicate with the corresponding communication port of the cover through the second check valve and the third check valve respectively. 2. The medical liquid mixing delivery device according to claim 1, characterized in that, the end of the inner cavity of the housing close to the first intermediate delivery tube and the end of the inner cavity of the venturi tube close to the housing are provided with Conveyor steps that limit positive and negative pressure drivers. 3 . The medical liquid mixing and delivery device according to claim 2 , wherein the height of the delivery step is L, where L=0.1D to 0.3D, and D is the inner cavity diameter of the housing. 4. The medical liquid mixing delivery device according to claim 2, characterized in that, a tapering section is provided on the side of the delivery step near the first intermediate delivery pipe, and the tapering angle of the tapering section is θ ₂ , θ ₂ =15°-45°. 5 . The medical liquid mixing and delivery device according to claim 3 , wherein the diameter of the communicating port is D ₁ , and D ₁ =0.3(D-2L) to 0.4(D-2L). 6. The medical liquid mixing and delivery device according to any one of claims 1-5, characterized in that, the mixing tube is provided with a mixing tube, and the second intermediate delivery tube passes through the mixing tube and the mixing tube. connected; the axis of the mixed liquid branch pipe is perpendicular to the axis of the liquid mixed pipe.

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