Automatic liquid changing infusion pump

Abstract

The utility model discloses an automatic liquid changing infusion pump which comprises a main body, two infusion branch pipes and an infusion main pipe are arranged on the main body, the two infusion branch pipes are both connected with the infusion main pipe, and a pinch-off mechanism and an expansion mechanism corresponding to the infusion branch pipes are arranged on the main body. The pinch-off mechanism comprises two clamping strips which synchronously and oppositely move, the two clamping strips are located on the two opposite sides of the infusion branch pipe respectively, the expansion mechanism comprises two expansion blocks which synchronously and oppositely move, the other expansion blocks are located on the two opposite sides of the infusion branch pipe respectively, and the expansion blocks and the clamping strips are located on the same moving plane. And the moving direction of the expansion block is perpendicular to the moving direction of the clamping strip, the clamping strip is connected with a first driving mechanism, the expansion block is provided with a second driving mechanism, the infusion branch pipe pinched off by the pinching-off mechanism is expanded through the expansion mechanism, and infusion of the infusion branch pipe is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of infusion pump technology, and more specifically relates to an automatic fluid-changing infusion pump. Background Technology

[0002] Currently, infusion pumps capable of automatic fluid replacement use a clamping mechanism to clamp one of the tubing, severing its internal passage. Then, the other tubing is released to open the internal passage, allowing the corresponding medication to flow through. However, after the tubing is released, it can only recover by relying on its own elasticity. Under normal circumstances, the passage area inside the tubing at the clamping point cannot be the same as that in other parts of the tubing, thus affecting the infusion. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides an automatic fluid replacement pump that can expand a clamped infusion branch to ensure fluid delivery.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an automatic fluid exchange infusion pump, comprising a main body, on which two infusion branch pipes and one infusion main pipe are provided. Both infusion branch pipes are connected to the infusion main pipe. The main body is provided with a clamping mechanism and an expansion mechanism corresponding to the infusion branch pipes. The clamping mechanism includes two synchronously opposing clamping bars, which are located on opposite sides of the infusion branch pipes. The expansion mechanism includes two synchronously opposing expansion blocks, which are located on opposite sides of the infusion branch pipes. The expansion blocks and clamping bars are located on the same moving plane, and the moving direction of the expansion blocks is perpendicular to the moving direction of the clamping bars. A first driving mechanism is connected to the clamping bars, and a second driving mechanism is provided on the expansion blocks.

[0005] Furthermore, the first driving mechanism includes a first motor and a first lead screw. Each of the two clamping bars is provided with a first nut corresponding to the first lead screw. The first lead screw is provided with two opposite threads. The two first nuts are respectively threaded to the two threads. The main shaft of the first motor is connected to the first lead screw. The clamping bars are slidably connected to the main body.

[0006] Furthermore, the main body is fixed with a guide rod, the clamping strip is provided with a guide block, the guide rod passes through the guide block, the guide block is slidably connected to the guide rod, and the guide rod and the first lead screw are respectively located on both sides of the infusion branch tube.

[0007] Furthermore, the second drive includes a second motor and a second lead screw. Each of the two expansion blocks is provided with a second nut corresponding to the second lead screw. The second lead screw is provided with two opposite threads. The two second nuts are threadedly connected to the two threads respectively. The main shaft of the second motor is connected to the first lead screw. The expansion block is slidably connected to the main body.

[0008] Furthermore, the expansion block is provided with an expansion groove corresponding to the infusion branch tube.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: During infusion, one infusion branch tube is the passage, while the other infusion branch tube is clamped by a corresponding clamping mechanism to prevent the drug solution from flowing through. When changing the infusion, one infusion branch tube is clamped by the clamping mechanism first, and the clamping mechanism on the other infusion branch tube is then released. Then, the clamped part on the infusion branch tube is expanded by the expansion mechanism so that the internal passage area is restored to a circle that is close to the other parts of the infusion branch tube, thus ensuring the infusion effect. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the automatic fluid exchange pump of this utility model;

[0011] Figure 2 This is a front structural diagram of the clamping mechanism and the expansion mechanism in the automatic fluid-changing infusion pump of this utility model;

[0012] Figure 3 This is a top view of the clamping mechanism and expansion mechanism in the automatic fluid-changing infusion pump of this utility model.

[0013] Figure 4 This is a schematic diagram showing the clamping mechanism and the expansion mechanism in the automatic fluid exchange pump of this utility model, which clamp and expand the infusion branch pipe.

[0014] Reference numerals: 1. Main body; 2. Infusion main tube; 3. Infusion branch tube; 4. Clamping bar; 5. Expansion block; 6. First motor; 7. First lead screw; 8. First lead screw nut; 9. Guide rod; 10. Guide block; 11. Second motor; 12. Second lead screw; 13. Second lead screw nut; 14. Expansion groove. Detailed Implementation

[0015] In the description of this utility model, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0016] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" or "a number" means two or more, unless otherwise explicitly specified.

[0017] Reference Figures 1 to 4 The present invention will be further described below.

[0018] An automatic fluid exchange infusion pump includes a main body 1, on which two infusion branch pipes 3 and one infusion main pipe 2 are provided. Both infusion branch pipes 3 are connected to the infusion main pipe 2. The main body 1 is provided with a clamping mechanism and an expansion mechanism corresponding to the infusion branch pipes 3. The clamping mechanism includes two synchronously opposing clamping bars 4, which are located on opposite sides of the infusion branch pipes 3. The expansion mechanism includes two synchronously opposing expansion blocks 5, which are located on opposite sides of the infusion branch pipes 3. The expansion blocks 5 and the clamping bars 4 are located on the same moving plane, and the moving direction of the expansion blocks 5 is perpendicular to the moving direction of the clamping bars 4. A first driving mechanism is connected to the clamping bars 4, and a second driving mechanism is provided on the expansion blocks 5.

[0019] like Figures 1 to 4 As shown, when one infusion branch tube 3 is infusion, its corresponding clamping mechanism is released, and the corresponding clamping mechanism on the other infusion branch tube 3 clamps its internal passage to prevent the medicine from flowing through. When changing the infusion, the released clamping mechanism first clamps the internal passage of the infusion branch tube 3, and the clamping mechanism on the other branch tube is released, connecting the passage between the infusion branch tube 3 and the main infusion tube 2. When the two clamping bars 4 on the clamping mechanism are completely released, the two expansion blocks 5 begin to move in opposite directions. After the expansion blocks 5 come into contact with the infusion branch tube 3, they squeeze the clamped part again in the vertical direction of the clamp, restoring the clamped part, which was originally elliptical due to clamping, to a circle similar to other parts of the infusion branch tube 3, thereby expanding the internal passage of the clamped part of the infusion branch tube 3 and ensuring the infusion effect.

[0020] like Figure 2 As shown, specifically, the two clamps 4 are located above and below the infusion branch tube 3, respectively, and the two expansion blocks 5 are located on the left and right sides of the infusion branch tube 3, respectively.

[0021] like Figure 2 As shown, specifically, after the two clamping strips 4 are removed, the space between them allows the two expansion blocks 5 to move in opposite directions, and after the two expansion blocks 5 are removed, the space between them also allows the two clamping strips 4 to move in opposite directions.

[0022] like Figure 1As shown, specifically, the main body 1 is provided with a peristaltic mechanism to allow the medication in the infusion tube 2 to be delivered into the patient's body. The peristaltic mechanism can adjust the flow rate of the medication in the infusion tube 2.

[0023] like Figure 2 As shown, in this preferred embodiment, the first driving mechanism includes a first motor 6 and a first lead screw 7. Each of the two clamping bars 4 is provided with a first nut 8 corresponding to the first lead screw 7. The first lead screw 7 is provided with two opposite threads. The two first nuts 8 are respectively threaded to the two threads. The main shaft of the first motor 6 is connected to the first lead screw 7. The clamping bars 4 are slidably connected to the main body 1.

[0024] Specifically, when the infusion branch tube 3 is clamped, the first motor 6 starts and drives the first lead screw 7 to rotate, thereby causing the two first nuts 8 threaded on the first lead screw 7 to move synchronously in opposite directions, which can drive the two clamping bars 4 to clamp the infusion branch tube 3 until the internal passage of the infusion branch tube 3 is clamped off. When the passage is opened, the main shaft of the first motor 6 rotates in the direction of rotation, which can cause the two clamping bars 4 to move in the opposite direction.

[0025] like Figure 2 As shown in the preferred embodiment, the main body 1 is fixed with a guide rod 9, the clamping strip 4 is provided with a guide block 10, the guide rod 9 passes through the guide block 10, the guide block 10 is slidably connected to the guide rod 9, and the guide rod 9 and the first lead screw 7 are respectively located on both sides of the infusion branch tube 3.

[0026] Specifically, the guide rod 9 and the guide block 10 work together to make the clamping bar 4 move stably.

[0027] like Figure 2 and Figure 3 As shown, in this preferred embodiment, the second drive includes a second motor 11 and a second lead screw 12. Each of the two expansion blocks 5 is provided with a second nut 13 corresponding to the second lead screw 12. The second lead screw 12 is provided with two opposite threads. The two second nuts 13 are respectively threaded to the two threads. The main shaft of the second motor 11 is connected to the first lead screw 7. The expansion block 5 is slidably connected to the main body 1.

[0028] Specifically, when expanding the clamped portion of the infusion branch tube 3, the second motor 11 drives the second lead screw 12 to rotate, causing the two expansion blocks 5 to move synchronously in opposite directions and expand after contacting the clamped portion.

[0029] Specifically, the main body 1 is provided with a groove corresponding to the expansion block 5, and the expansion block 5 slides in the groove.

[0030] like Figure 2 and Figure 4As shown in the preferred embodiment, the expansion block 5 is provided with an expansion groove 14 corresponding to the infusion branch tube 3. That is, when the two expansion blocks 5 are closed, the two expansion grooves 14 are closed to form the outer circle of the infusion branch tube 3, ensuring the expansion effect.

[0031] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An automatic fluid exchange pump, characterized in that: The device includes a main body, on which two infusion branch tubes and one infusion main tube are provided. Both infusion branch tubes are connected to the infusion main tube. The main body is provided with clamping mechanisms and expansion mechanisms corresponding to the infusion branch tubes. The clamping mechanism includes two synchronously opposing clamping bars located on opposite sides of the infusion branch tubes. The expansion mechanism includes two synchronously opposing expansion blocks located on opposite sides of the infusion branch tubes. The expansion blocks and clamping bars are located on the same moving plane, and the moving direction of the expansion blocks is perpendicular to the moving direction of the clamping bars. A first driving mechanism is connected to the clamping bars, and a second driving mechanism is provided on the expansion blocks.

2. The automatic fluid exchange pump according to claim 1, characterized in that: The first driving mechanism includes a first motor and a first lead screw. Each of the two clamping bars is provided with a first nut corresponding to the first lead screw. The first lead screw is provided with two opposite threads. The two first nuts are respectively threaded to the two threads. The main shaft of the first motor is connected to the first lead screw. The clamping bars are slidably connected to the main body.

3. The automatic fluid exchange pump according to claim 2, characterized in that: The main body is fixed with a guide rod, and a guide block is provided on the clamping strip. The guide rod passes through the guide block, and the guide block is slidably connected to the guide rod. The guide rod and the first lead screw are respectively located on both sides of the infusion branch tube.

4. The automatic fluid exchange pump according to claim 1, characterized in that: The second drive includes a second motor and a second lead screw. Each of the two expansion blocks is provided with a second nut corresponding to the second lead screw. The second lead screw is provided with two opposite threads. The two second nuts are threadedly connected to the two threads respectively. The main shaft of the second motor is connected to the first lead screw. The expansion block is slidably connected to the main body.

5. The automatic fluid exchange pump according to claim 1, characterized in that: The expansion block is provided with an expansion groove corresponding to the infusion branch tube.

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