Automatic liquid changing infusion apparatus

Abstract

The utility model relates to an infusion apparatus capable of automatically changing liquid. The infusion apparatus comprises a mounting rack and a mounting box, a vertical supporting rod capable of vertically moving is arranged on the mounting frame, a mounting column is rotatably arranged on the upper portion of the vertical supporting rod, a plurality of hooks are evenly distributed on the upper portion of the mounting column in the circumferential direction and used for hanging medicine bottles or medicine bags, and connecting pieces communicated with the interiors of the medicine bottles or the medicine bags are arranged at the bottoms of the medicine bottles or the medicine bags. A plurality of shifting rods are evenly distributed on the lower portion of the mounting column in the circumferential direction. The mounting box is fixedly arranged on the mounting frame; a shifting device, a clamping device, a lifting driving device and a needle head lifting device are arranged in the mounting box; the stirring device comprises a rotating rod and a first driving assembly which are connected, the lifting driving device is connected with the vertical supporting rod, and the needle head lifting device is used for driving a needle head to ascend and penetrate into the clamped and fixed connecting piece so that liquid medicine can flow into the infusion tube. Automatic operation of infusion and medicine bottle replacement infusion is achieved, labor force is saved, and the functions are diversified.

Description

Technical Field

[0001] The utility model belongs to the technical field of infusion, and particularly relates to an automatic liquid-changing infusion set. Background Art

[0002] When infusing a patient, an infusion stand is usually used. The ordinary infusion stand has a simple structure and a single function. It can only be used to hang medicine bottles. The nurse hangs the drip bottle on the hook of the infusion stand, and then inserts the needle at one end of the infusion tube into the connection port of the medicine bottle for infusion. When it is necessary to change the medicine bottle, the nurse also needs to pull out the needle at one end of the infusion tube from the used medicine bottle and then insert it into the new medicine bottle. The whole process requires manual operation, which is laborious. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide an automatic liquid-changing infusion set, which solves the technical problems such as the few functions of the ordinary infusion stand and the large labor required for operation.

[0004] To solve the above problems, the technical solution of the utility model is: an automatic liquid-changing infusion set, including a mounting frame and a mounting box;

[0005] A vertically movable vertical support rod is arranged on the mounting frame. An installation column is rotatably arranged on the upper part of the vertical support rod. A plurality of hooks are circumferentially and evenly distributed on the upper part of the installation column. The hooks are used to hang medicine bottles or medicine bags. The bottom of the medicine bottle or medicine bag has a connector communicating with the inside of the medicine bottle or medicine bag. A plurality of toggle rods are circumferentially and evenly distributed on the lower part of the installation column;

[0006] The mounting box is fixedly arranged on the mounting frame; a toggling device, a clamping device, a lifting driving device and a needle lifting device are arranged in the mounting box; the toggling device includes a rotating rod and a first driving component connected to each other. The first driving component is used to drive the rotating rod to rotate to toggle the toggle rod to rotate, so as to drive the installation column to rotate on the vertical support rod; the clamping device is used to clamp the connector for the needle to pierce into the connector and withdraw from the connector; the lifting driving device is connected to the vertical support rod, and the lifting driving device is used to control the lifting of the vertical support rod so that the connector is separated from the clamping device or enters the clamping device; the needle lifting device is used to drive the needle to rise and pierce into the clamped and fixed connector so that the liquid medicine flows into the infusion tube.

[0007] Optionally, the first driving component includes a first driver, a first gear, a driven shaft and a second gear. The first driver is connected to the first gear. The first driver is used to drive the first gear to rotate. The second gear is coaxially and fixedly arranged on the driven shaft. The first gear meshes with the second gear. One end of the rotating rod is fixedly connected to the driven shaft.

[0008] Optionally, it also includes a clutch lifting device located in the installation box, the clutch lifting device includes a first vertical sleeve, a connected second driver and a first cam, the first vertical sleeve is fixed in the installation box, the driven shaft can rotatably slide through the first vertical sleeve, the side end of the first cam is in contact with the lower end of the driven shaft, and the second driver is used to drive the cam to rotate to drive the driven shaft to rise and fall to achieve the separation and cooperation of the rotating rod and the shifting rod.

[0009] Optionally, the clamping device includes a connected third drive and a clamping jaw, the clamping jaw is used to clamp the connecting member, the clamping jaw includes a first clamping member, a second clamping member and a screw with a reverse thread, the first clamping member is threadedly installed on the forward thread section of the screw, the second clamping member is threadedly installed on the reverse thread section of the screw, the third drive is connected to the screw, and the third drive is used to drive the screw to rotate to control the opening and clamping of the clamping jaw.

[0010] Optionally, the lifting drive device includes a fourth driver and a second cam connected to each other, the second cam abuts against the lower part of the baffle on the vertical support rod, and the fourth driver is used to drive the second cam to rotate to drive the connecting member to leave the clamping device and enter the clamping device.

[0011] Optionally, the needle lifting device includes a second vertical sleeve, a return spring, a resistance piece, a fifth driver and a third cam. The second vertical sleeve is fixed in the installation box, and the upper end opening of the second vertical sleeve is opposite to the connecting piece clamped and fixed in the clamping device; the lower end of the second vertical sleeve is elastically connected to the resistance piece through the vertical return spring, the needle is inserted into the second vertical sleeve and the vertical return spring, the side wall of the third cam is in sliding contact with the resistance piece, and the fifth driver is used to drive the third cam to rotate to drive the needle to be lifted and lowered to realize the needle inserting into the connecting piece and the needle being pulled out of the connecting piece.

[0012] Optionally, the fifth driver is connected to the third cam through a second gear transmission assembly, and the second gear transmission assembly includes a fifth gear, a sixth gear and a transmission shaft; the fifth gear and the third cam are coaxially fixed on the transmission shaft, the sixth gear is connected to the fifth driver, and the transmission shaft is installed on the installation box through a bracket. The fifth driver is used to drive the sixth gear to rotate, thereby driving the fifth gear, the transmission shaft and the third cam to rotate, thereby completing the lifting and lowering of the needle.

[0013] Optionally, a base is provided at the bottom of the mounting frame, and a roller is provided at the bottom of the base.

[0014] Optionally, a control panel is provided outside the installation box, and the control panel has control buttons and a display screen, and the control buttons are used to control the automatic liquid exchange infusion device to automatically exchange liquid.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The automatic liquid-changing infusion device of the utility model realizes the automatic operation of infusion and replacement of medicine bottle infusion by cooperating with the toggle device, clamping device, lifting drive device and needle lifting device in the installation box, increases the function of the infusion stand and saves labor. By setting the clutch lifting device, the automatic and manual switching of the rotation of the installation column is realized to meet different operation requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the external structure of the automatic liquid exchange infusion device in the embodiment;

[0018] Figure 2 This is a schematic diagram of the interior of the installation box in the embodiment;

[0019] Figure 3 This is a schematic diagram of one side of the installation box in the embodiment;

[0020] Figure 4 It is a schematic diagram of the other side of the installation box in the embodiment.

[0021] Figure numerals: 1, mounting frame; 11, vertical support rod; 12, mounting column; 13, hook; 14, medicine bag; 141, connecting piece; 15, lever; 16, baffle; 2, mounting box; 21, control panel; 22, control button; 23, display screen; 24, bracket; 3, lever device; 31, rotating rod; 32, first driver; 33, first gear; 34, driven shaft; 35, second gear; 4, clutch lifting device; 41, first vertical sleeve; 42, second driver; 43, first cam; 5, clamping device; 51, third driver; 5 2. Clamping claw; 521. First clamping member; 522. Second clamping member; 523. Screw rod; 53. First gear transmission assembly; 531. Third gear; 532. Fourth gear; 6. Lifting drive device; 61. Fourth drive; 62. Second cam; 7. Needle lifting device; 71. Second vertical sleeve; 72. Return spring; 73. Resistance member; 74. Fifth drive; 75. Third cam; 76. Second gear transmission assembly; 761. Fifth gear; 762. Sixth gear; 763. Transmission shaft; 77. Needle; 8. Base; 81. Roller. DETAILED DESCRIPTION

[0022] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] Example: Figures 1-4As shown in the figure, this embodiment provides an automatic liquid-changing infusion set, which includes a mounting frame 1 and a mounting box 2. A vertically movable vertical support rod 11 is arranged on the mounting frame 1. An installation column 12 is rotatably arranged on the upper part of the vertical support rod 11. A plurality of hooks 13 are evenly distributed circumferentially on the upper part of the installation column 12. The hooks 13 are used for hanging medicine bottles or medicine bags 14. The bottom of the medicine bottle or medicine bag 14 has a connector 141 that communicates with the inside of the medicine bottle or medicine bag 14. A plurality of toggle rods 15 are evenly distributed circumferentially on the lower part of the installation column 12. The mounting box 2 is fixedly arranged on the mounting frame 1. A toggling device 3, a clamping device 5, a lifting drive device 6 and a needle lifting device 7 are arranged in the mounting box 2. The toggling device 3 includes a rotating rod 31 and a first drive assembly connected to each other. The first drive assembly is used to drive the rotating rod 31 to rotate to toggle the toggle rod 15 to rotate, so as to drive the installation column 12 to rotate on the vertical support rod 11. The clamping device 5 is used to clamp the connector 141 for the needle 77 of the infusion tube to pierce into the connector 141 and withdraw from the connector 141. The lifting drive device 6 is connected to the vertical support rod 11. The lifting drive device 6 is used to control the lifting of the vertical support rod 11 so that the connector 141 is separated from the clamping device 5 or enters the clamping device 5. The needle lifting device 7 is used to drive the needle 77 of the infusion tube to rise and pierce into the clamped and fixed connector 141 so that the liquid medicine flows into the infusion tube.

[0024] With the above settings, when infusion is needed, start the first drive assembly to drive the rotating rod 31 to rotate. During the rotation of the rotating rod 31, drive the toggle rod 15 to rotate, thereby driving the installation column 12 to rotate, so that the medicine bottle on the hook 13 rotates to directly above the needle 77. Then start the lifting drive device 6. The lifting drive device 6 controls the vertical support rod 11 to descend so that the connector 141 of the medicine bottle enters the clamping device 5. Start the clamping device 5 to clamp the connector 141. Then start the needle lifting device 7 to drive the needle 77 to rise and insert it into the connector 141, thus completing the infusion work. When it is necessary to replace the medicine bottle, start the needle lifting device 7 to drive the needle 77 to descend so that the needle 77 is taken out from the connector 141. Then start the clamping device 5 to loosen the connector 141. Start the lifting drive device 6. The lifting drive device 6 controls the vertical support rod 11 to rise so that the connector 141 of the medicine bottle leaves the clamping device 5. Start the first drive assembly to drive the rotating rod 31 to rotate. The rotating rod 31 drives the toggle rod 15 to rotate. The toggle rod 15 drives the installation column 12 to rotate until the new medicine bottle is directly above the needle 77. Then repeat the above operation steps when infusion is needed, insert the needle 77 into the connector 141 of the new medicine bottle, and the replacement of the medicine bottle and the infusion operation can be completed. The operation is automated, saving labor and having various functions.

[0025] In the automatic fluid exchange infusion device of this embodiment, the first driving assembly includes a first driver 32, a first gear 33, a driven shaft 34 and a second gear 35. The first driver 32 is connected to the first gear 33. The first driver 32 is used to drive the first gear 33 to rotate. The second gear 35 is coaxially fixed on the driven shaft 34. The first gear 33 is meshed with the second gear 35. One end of the rotating rod 31 is fixedly connected to the driven shaft 34. The structure is simple and the operation is stable. The rotation of the first gear 33 drives the second gear 35 and the driven shaft 34 to rotate, so that the driven shaft 34 drives the rotating rod 31 to rotate, thereby realizing the shifting of the shifting rod 15.

[0026] Specifically, the first driver 32 is fixed on the installation box 2 through the bracket 24 .

[0027] The automatic fluid exchange infusion device of this embodiment also includes a clutch lifting device 4 located in the installation box 2. The clutch lifting device 4 includes a first vertical sleeve 41, a connected second driver 42 and a first cam 43. The first vertical sleeve 41 is fixed in the installation box 2. The driven shaft 34 can be rotatably slid through the first vertical sleeve 41. The side end of the first cam 43 contacts the lower end of the driven shaft 34. The second driver 42 is used to drive the cam to rotate to drive the driven shaft 34 to rise and fall to achieve the separation and cooperation of the rotating rod 31 and the shifting rod 15.

[0028] Through the above arrangement, when the lever 15 needs to be turned, the second driver 42 is started, and the second driver 42 drives the first cam 43 to rotate. During the rotation of the first cam 43, the driven shaft 34 is pushed up until the first gear 33 and the second gear 35 are partially or completely meshed. Then, the second driver 42 is turned off, the first cam 43 stops rotating, and then the first driver 32 is started to drive the lever 15 to rotate. When the lever 15 does not need to be turned, the second driver 42 is started, and the second driver 42 drives the first cam 43 to rotate. During the rotation of the first cam 43, the height of the contact point on the first cam 43 with the driven shaft 34 is gradually reduced, so that the driven shaft 34 moves downward under the action of gravity until the first gear 33 and the second gear 35 are separated. At this time, the rotation of the mounting column 12 can be manually controlled without causing interference between the rotating rod 31 and the lever 15.

[0029] Specifically, the first vertical sleeve 41 and the second driver 42 are fixed on the installation box 2 through the brackets 24 respectively.

[0030] In the automatic fluid exchange infusion device of this embodiment, the clamping device 5 includes a connected third driver 51 and a clamping jaw 52, ​​the clamping jaw 52 is used to clamp the connecting piece 141 so as to control the insertion and withdrawal of the needle 77 of the infusion tube, the clamping jaw 52 includes a first clamping piece 521, a second clamping piece 522 and a screw 523 with a reverse thread, the first clamping piece 521 is threadedly installed on the forward thread section of the screw 523, the second clamping piece 522 is threadedly installed on the reverse thread section of the screw 523, the third driver 51 is connected to the screw 523, and the third driver 51 is used to drive the screw 523 to rotate to control the opening and clamping of the clamping jaw 52, ​​thereby realizing that the clamping jaw 52 loosens the connecting piece 141 and clamps the connecting piece 141.

[0031] Through the above arrangement, when it is necessary to clamp the connecting member 141, the third driver 51 is started, the third driver 51 drives the screw 523 to rotate, the first clamping member 521 and the second clamping member 522 approach each other, so that the clamping claw 52 clamps the connecting member 141, and when it is necessary to loosen the connecting member 141, the third driver 51 is started, the third driver 51 drives the screw 523 to rotate in the opposite direction, the first clamping member 521 and the second clamping member 522 move away from each other, so that the clamping claw 52 loosens the connecting member 141. Specifically, the third driver 51 is fixed to the installation box 2 through the bracket 24. Preferably, the first clamping member 521 and the second clamping member 522 are respectively arranged on the guide rods fixed in the installation box 2, and the guide rods are parallel to the screw 523, so as to prevent the first clamping member 521 and the second clamping member 522 from rotating.

[0032] In the automatic liquid exchange infusion device of this embodiment, the third driver 51 is connected to the screw 523 through the first gear transmission assembly 53, the first gear transmission assembly 53 includes a meshing third gear 531 and a fourth gear 532, the third gear 531 is connected to the third driver 51, the fourth gear 532 is coaxially fixedly connected to the screw 523, the third driver 51 drives the third gear 531 to rotate, thereby driving the fourth gear 532 and the screw 523 to rotate, and realizing the opening and closing of the clamp 52. Specifically, the screw 523 is rotatably mounted on the mounting box 2 through the bracket 24.

[0033] In the automatic liquid exchange infusion device of this embodiment, the lifting drive device 6 includes a fourth driver 61 and a second cam 62 connected to each other, the second cam 62 abuts against the lower part of the baffle 16 on the vertical support rod 11, and the fourth driver 61 is used to drive the second cam 62 to rotate to drive the connecting member 141 to leave the clamping device 5 and enter the clamping device 5, with a simple structure and good working stability. Specifically, the fourth driver 61 is fixed to the installation box 2 through the bracket 24.

[0034] In the automatic liquid exchange infusion device of this embodiment, the needle lifting device 7 includes a second vertical sleeve 71, a reset spring 72, a resistance member 73, a fifth driver 74 and a third cam 75. The second vertical sleeve 71 is fixed in the installation box 2, and the upper end opening of the second vertical sleeve 71 is opposite to the connecting member 141 clamped and fixed in the clamping device 5; the lower end of the second vertical sleeve 71 is elastically connected to the resistance member 73 through the vertical reset spring 72, and the needle 77 is slidably inserted into the second vertical sleeve 71, and the vertical reset spring 72 is sleeved on the outside of part of the needle 77. The side wall of the third cam 75 is in sliding contact with the resistance member 73, and the fifth driver 74 is used to drive the third cam 75 to rotate to drive the needle 77 to rise and fall to realize the needle 77 piercing the connecting member 141 and the needle 77 being pulled out of the connecting member 141. Specifically, the fifth driver 74 is fixed to the installation box 2 through the bracket 24. The infusion tube connected to the needle 77 extends from one side of the vertical return spring 72 ; the bottom of the needle 77 is fixedly connected to the upper end of the abutment 73 .

[0035] Through the above arrangement, when it is necessary to insert the needle 77 into the connecting piece 141, the fifth driver 74 is started, and the fifth driver 74 drives the third cam 75 to rotate. During the rotation, the third cam 75 pushes the abutment 73 to rise, and the abutment pushes the lower end of the vertical return spring 72 and the needle 77 to move upward until the needle is inserted into the connecting piece 141, and the vertical return spring 72 is compressed; when it is necessary to remove the needle 77 from the connecting piece 141, the fifth driver 74 is started, and the fifth driver 74 drives the third cam 75 to rotate, and the height of the upper distal end of the third cam 75 gradually decreases, so that the height of the contact point between the abutment 73 and the third cam 75 gradually decreases, and the abutment 73 moves downward under the action of gravity and the vertical return spring 72, thereby driving the needle 77 to move downward until the needle 77 is removed from the connecting piece 141.

[0036] In the automatic fluid exchange infusion device of this embodiment, the fifth driver 74 is connected to the third cam 75 through the second gear transmission assembly 76, and the second gear transmission assembly 76 includes a fifth gear 761, a sixth gear 762 and a transmission shaft 763; the fifth gear 761 and the third cam 75 are both coaxially fixedly mounted on the transmission shaft 763, the sixth gear 762 is connected to the fifth driver 74, and the transmission shaft 763 is installed on the installation box 2 through the bracket 24, and the fifth driver 74 is used to drive the sixth gear 762 to rotate, thereby driving the fifth gear 761, the transmission shaft 763 and the third cam 75 to rotate, thereby completing the lifting and lowering of the needle 77.

[0037] In the automatic fluid exchange infusion device of this embodiment, a base 8 is provided at the bottom of the mounting frame 1, and a roller 81 is provided at the bottom of the base 8 to facilitate the movement of the mounting frame 1. Specifically, the base 8 is a triangular support seat.

[0038] In the automatic fluid-changing infusion set of this embodiment, a control panel 21 is arranged outside the installation box 2. The control panel 21 is provided with control buttons 22 and a display screen 23. The control buttons 22 are used to control the automatic fluid-changing infusion set to perform automatic fluid change.

[0039] In the automatic fluid-changing infusion set of this embodiment, the above-mentioned driver can adopt a motor.

Claims

1. An automatic liquid-changing infusion device, characterized in that: It comprises a mounting frame (1) and a mounting box (2); A vertical support rod (11) that can move vertically is arranged on the mounting frame (1), a mounting column (12) is rotatably arranged on the upper part of the vertical support rod (11), a plurality of hooks (13) are evenly distributed around the upper part of the mounting column (12), the hooks (13) are used to hang medicine bottles or medicine bags (14), and the bottom of the medicine bottle or medicine bag (14) has a connecting piece (141) that is connected to the inside of the medicine bottle or medicine bag (14); a plurality of levers (15) are evenly distributed around the lower part of the mounting column (12); The installation box (2) is fixedly mounted on the installation frame (1); a toggle device (3), a clamping device (5), a lifting drive device (6) and a needle lifting device (7) are arranged in the installation box (2); the toggle device (3) comprises a connected rotating rod (31) and a first driving assembly, the first driving assembly is used to drive the rotating rod (31) to rotate so as to drive the toggle rod (15) to rotate, thereby driving the installation column (12) to rotate on the vertical support rod (11); the clamping device (5) is used to clamp the connection The connecting piece (141) is used for the needle to penetrate into the connecting piece (141) and be withdrawn from the connecting piece (141); the lifting drive device (6) is connected to the vertical support rod (11), and the lifting drive device (6) is used to control the vertical support rod (11) to move up and down so that the connecting piece (141) can be separated from the clamping device (5) or enter the clamping device (5); the needle lifting device (7) is used to drive the needle (77) to rise and penetrate into the clamped and fixed connecting piece (141) so that the drug solution can flow into the infusion tube.

2. The automatic liquid-changing infusion device according to claim 1, characterized in that: The first driving assembly comprises a first driver (32), a first gear (33), a driven shaft (34) and a second gear (35). The first driver (32) is connected to the first gear (33). The first driver (32) is used to drive the first gear (33) to rotate. The second gear (35) is coaxially fixed on the driven shaft (34). The first gear (33) is meshed with the second gear (35). One end of the rotating rod (31) is fixedly connected to the driven shaft (34).

3. The automatic liquid-changing infusion device according to claim 2, characterized in that: The invention also includes a clutch lifting device (4) located in the installation box (2), the clutch lifting device (4) includes a first vertical sleeve (41), a second driver (42) and a first cam (43) connected thereto, the first vertical sleeve (41) being fixed in the installation box (2), the driven shaft (34) being rotatably slidably arranged through the first vertical sleeve (41), the side end of the first cam (43) being in contact with the lower end of the driven shaft (34), and the second driver (42) being used to drive the cam to rotate so as to drive the driven shaft (34) to rise and fall, thereby realizing the separation and matching of the rotating rod (31) and the shifting rod (15).

4. The automatic liquid-changing infusion device according to claim 1, characterized in that: The clamping device (5) comprises a third driver (51) and a clamping jaw (52) connected to each other. The clamping jaw (52) is used to clamp the connecting member (141). The clamping jaw (52) comprises a first clamping member (521), a second clamping member (522) and a screw rod (523) having a reverse thread. The first clamping member (521) is threadedly mounted on the forward thread section of the screw rod (523), and the second clamping member (522) is threadedly mounted on the reverse thread section of the screw rod (523). The third driver (51) is connected to the screw rod (523), and the third driver (51) is used to drive the screw rod (523) to rotate so as to control the opening and clamping of the clamping jaw (52).

5. The automatic liquid-changing infusion device according to claim 1, characterized in that: The lifting drive device (6) includes a fourth driver (61) and a second cam (62) connected to each other, the second cam (62) abuts against the lower part of the baffle (16) on the vertical support rod (11), and the fourth driver (61) is used to drive the second cam (62) to rotate so as to drive the connecting member (141) to leave the clamping device (5) and enter the clamping device (5).

6. The automatic liquid-changing infusion device according to claim 1, characterized in that: The needle lifting device (7) comprises a second vertical sleeve (71), a return spring (72), a resistance piece (73), a fifth driver (74) and a third cam (75). The second vertical sleeve (71) is fixed in the installation box (2). The upper end opening of the second vertical sleeve (71) is vertically opposite to the connecting piece (141) clamped and fixed in the clamping device (5); the lower end of the second vertical sleeve (71) is elastically connected to the resistance piece (73) through the vertical return spring (72). The needle (77) is inserted through the second vertical sleeve (71) and the vertical return spring (72). The side wall of the third cam (75) is in sliding contact with the resistance piece (73). The fifth driver (74) is used to drive the third cam (75) to rotate so as to drive the needle to be lifted and lowered to realize the needle piercing the connecting piece (141) and the needle being withdrawn from the connecting piece (141).

7. The automatic liquid-changing infusion device according to claim 6, characterized in that: The fifth driver (74) is connected to the third cam (75) through a second gear transmission assembly (76), and the second gear transmission assembly (76) includes a fifth gear (761), a sixth gear (762) and a transmission shaft (763); the fifth gear (761) and the third cam (75) are coaxially fixedly mounted on the transmission shaft (763), the sixth gear (762) is connected to the fifth driver (74), and the transmission shaft (763) is mounted on the installation box (2) through a bracket (24); the fifth driver (74) is used to drive the sixth gear (762) to rotate, thereby driving the fifth gear (761), the transmission shaft (763) and the third cam (75) to rotate, thereby completing the lifting and lowering of the needle (77).

8. The automatic liquid-changing infusion device according to claim 1, characterized in that: A base (8) is arranged at the bottom of the mounting frame (1), and a roller (81) is arranged at the bottom of the base (8).

9. The automatic liquid-changing infusion device according to claim 1, characterized in that: A control panel (21) is arranged outside the installation box (2), and the control panel (21) is provided with control buttons (22) and a display screen (23). The control buttons (22) are used to control the automatic liquid exchange infusion device to automatically exchange liquid.

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