A peritoneal dialysis solution bag filling device with controllable flow rate

Abstract

The present invention discloses a peritoneal dialysis solution bag filling device with controllable flow rate. The filling device includes two pipelines for guiding liquid to flow from a flowmeter to a nozzle. The two pipelines can be arranged side by side or nested with each other. When filling a bottle or a bag, the two pipelines can be arranged side by side, and the flow rate of filling can be adjusted by opening and closing one of the two pipelines through a stop valve. When only filling a bag, the two pipelines can be nested with each other, the bag mouth is sleeved on the outer pipeline, and then the bag mouth is tightened by a bag neck constrictor to make it fit with the inner pipeline, so as to eliminate the gap between the two pipelines. In this way, the flow rate of filling can also be adjusted. Thus, the filling device can change the flow rate of filling less, but can greatly reduce the power of the liquid spraying out of the nozzle, avoiding the liquid splashing to the outside of the bottle / bag, so as to improve the filling efficiency while ensuring the product quality.

Description

Technical Field

[0001] The present invention relates to the field of nozzles for introducing materials into containers, and particularly to a filling device for peritoneal dialysis solution bags with controllable flow rate. Background Art

[0002] When filling existing peritoneal dialysis solution bottles, when the filling pressure reaches 0.4 mpa and the filling reaches 85% of the set capacity, the phenomenon of the liquid medicine splashing out of the bottle mouth will occur. Since the main component of the liquid medicine is glucose, when the liquid medicine splashes out of the bottle and is sterilized at high temperature, the liquid medicine splashed outside the bottle will turn yellow and black, and there is a risk of contamination when patients use this product.

[0003] At the same time, the splashing of the liquid medicine causes the filling volume of the liquid medicine not to meet the requirements, and when patients use it, it may lead to insufficient dialysis and abnormal physical conditions such as edema.

[0004] When filling existing peritoneal dialysis solution bags, when the filling pressure reaches 0.4 mpa and the filling reaches 85% of the set capacity, there will occasionally be a problem that the connection between the peritoneal dialysis solution bag and the filling port of the filling machine is not tight, and the peritoneal dialysis solution bag separates from the filling port and drops.

[0005] To solve the above technical problems, usually the method of reducing the filling pressure is adopted. When the filling pressure is 0.2 mpa, there will be no problem of the liquid medicine splashing out of the bottle mouth during the filling process. However, this method greatly reduces the filling efficiency, and the filling speed can only reach about 1000 bottles per hour, with low efficiency. Summary of the Invention

[0006] The purpose of the present invention is to provide a filling device for peritoneal dialysis solution bags with controllable flow rate, so as to solve the technical problems that when filling peritoneal dialysis solution bottles / bags, if the filling pressure is high, the liquid medicine at the bottle mouth is likely to splash out, or the bag body is washed off the filling line, affecting the quality of the product, and if the filling pressure is low, the filling efficiency is low.

[0007] To solve the above technical problems:

[0008] The present invention provides a filling device for peritoneal dialysis solution bags with controllable flow rate, including: a frame;

[0009] A filling pipe, which is arranged on the frame, one end of the filling pipe is connected to a liquid source through a flow meter, and the other end of the filling pipe is used to transfer liquid to a bottle / bag;

[0010] Wherein, the filling pipe is simultaneously connected to the flow meter through a first pipe and a second pipe;

[0011] A first on-off valve is installed on the first pipe, a second on-off valve is installed on the second pipe, and the cross-sectional area of the first pipe > the cross-sectional area of the second pipe.

[0012] Furthermore, both the first pipe and the second pipe are circular pipes. The pipe diameter range of the first pipe is DN10 - DN50, and the pipe diameter range of the second pipe is DN4 - DN30.

[0013] The present invention also provides a peritoneal dialysis solution bag filling device with controllable flow rate, including a frame;

[0014] A filling pipe, which is arranged on the frame. One end of the filling pipe is connected to a liquid source through a flow meter, and the other end of the filling pipe forms a nozzle with a cylindrical outer peripheral surface. An inner pipe is arranged at the end of the nozzle. Both ends of the inner pipe are located on the inner and outer sides of the nozzle respectively. The inner diameter of the nozzle > the inner diameter of the inner pipe, and liquid can flow through the inside of the inner pipe and the gap between the nozzle and the inner pipe. The bag is sleeved on the nozzle through the bag neck and fixed by a bag fixer;

[0015] A bag neck constrictor, which is arranged on the frame. The bag neck constrictor is used to perform the action of constricting the bag neck so that the inner wall of the bag neck is close to the outer wall of the inner pipe, or the inner walls of the bag neck are close to each other;

[0016] A robotic arm, which is arranged on the frame. The execution part of the robotic arm is connected to the bag neck constrictor. The robotic arm is used to perform the action of driving the bag neck constrictor to move so that the bag neck clamped by the bag neck constrictor is detached from the nozzle.

[0017] Furthermore, the inner pipe is slidably connected to the nozzle. The end of the inner pipe close to the inside of the nozzle forms a flange that turns outward. The end of the nozzle turns inward to form a limiting ring. The outer diameter of the flange > the inner diameter of the limiting ring > the outer diameter of the inner pipe. An elastic member is arranged between the flange and the limiting ring. The elastic member is arranged between the inner wall of the nozzle and the outer wall of the inner pipe, and the elastic member makes the inner pipe always have a tendency to move towards the inside of the nozzle.

[0018] Furthermore, a limiting structure is formed or connected to the part of the nozzle far from its end. The limiting structure can prevent the inner pipe from passing through the nozzle. The distance between the limiting structure and the end of the nozzle > the axial length of the inner pipe.

[0019] Furthermore, the limiting structure is a depression formed on the nozzle;

[0020] The limiting structure is formed on the nozzle by extrusion, and the side of the extruded part bulges outward.

[0021] Furthermore, the end of the flange far from the inner pipe turns inward to form a spherical ring body. The outer wall of the spherical ring body is in clearance fit with the inner wall of the nozzle. Water passing holes penetrating the inner pipe are formed on the flange.

[0022] Further, the cross-section of the inner tube is oval in shape.

[0023] Further, the bag neck constrictor includes clamping blocks and a second driver. The second driver is arranged on the frame. There are two clamping blocks which are connected to the actuator of the second driver. The two clamping blocks are respectively located below both sides of the nozzle. The second driver is used to drive the two clamping blocks to approach each other so that the inner wall of the bag neck is close to the outer wall of the inner tube, or the inner walls of the bag neck are in contact with each other.

[0024] Further, the robotic arm includes a third driver and a connecting member. The third driver is arranged on the frame. The connecting member connects the actuator of the third driver and the bag neck constrictor. The third driver is used to drive the clamping block to move along an arc line which passes through the end of the nozzle and is tangent to the center line of the nozzle.

[0025] The present application has the following beneficial effects compared with the prior art:

[0026] A peritoneal dialysis solution bag filling device with controllable flow rate is provided. The filling device includes two pipes for guiding liquid to flow from the flow meter to the nozzle. The two pipes can be arranged side by side or nested with each other. When filling a bottle or a bag, the two pipes can be arranged side by side, and the flow rate of filling can be adjusted by opening and closing one of the two pipes through a stop valve. When only filling a bag, the two pipes can be nested with each other. The bag mouth is sleeved on the outer pipe, and then the bag neck constrictor is used to tighten the bag mouth to make it fit with the inner pipe, so as to eliminate the gap between the two pipes. In this way, the flow rate of filling can also be adjusted. Thus, the filling device can change the flow rate of filling less, but can greatly reduce the power of the liquid spraying out of the nozzle, avoiding the liquid from splashing to the outside of the bottle / bag. Therefore, in addition to improving the filling efficiency, the quality of the product can also be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only exemplary. For those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained according to the provided drawings.

[0028] Figure 1 It is a mechanical schematic diagram of an embodiment of the present invention;

[0029] Figure 2 It is a perspective view of another embodiment of the present invention, in which the filling pipe and the nozzle are shown in perspective;

[0030] Figure 3 It is an internal structure diagram of the filling pipe of another embodiment of the present invention;

[0031] Figure 4 Side view of another embodiment of the present invention performing full-flow filling operation;

[0032] Figure 5 is Figure 4 Cross-sectional view in the direction of A-A of and its partial enlarged view;

[0033] Figure 6 Side view of another embodiment of the present invention performing low-flow filling operation;

[0034] Figure 7 is Figure 6 Cross-sectional view in the direction of B-B of and its partial enlarged view;

[0035] Figure 8 Action step diagram of bag loading, full-flow filling, low-flow filling and bag unloading of another embodiment of the present invention;

[0036] The reference numerals in the figure are respectively represented as follows:

[0037] 1 - Frame; 11 - Microswitch; 12 - Flowmeter; 13 - First pipeline; 14 - Second pipeline; 15 - First check valve; 16 - Second check valve; 2 - Filling pipe; 21 - Nozzle; 211 - Limit ring; 212 - Limit structure; 22 - Inner pipe; 221 - Flange; 222 - Spherical ring body; 223 - Water passing hole; 23 - Elastic member; 3 - Bag; 31 - Bag neck; 4 - Bag fixer; 41 - Pressing block; 42 - First driver; 5 - Bag neck constrictor; 51 - Clamping block; 52 - Second driver; 6 - Robot arm; 61 - Third driver; 62 - Connecting member. Detailed implementation mode

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] This application also provides an alternative embodiment, which is applicable to filling bottles or bags, such as Figure 1 shown:

[0040] A peritoneal dialysis solution bag filling device with controllable flow rate, comprising a frame 1 and a filling pipe 2.

[0041] The filling pipe 2 is arranged on the frame 1. One end of the filling pipe 2 is connected to a liquid source through a flowmeter 12, and the other end of the filling pipe 2 is used to transfer peritoneal dialysis solution to a peritoneal dialysis solution bottle / bag;

[0042] Among them,

[0043] The filling pipe 2 is connected to the flow meter 12 through the first pipe 13 and the second pipe 14 at the same time;

[0044] A first check valve 15 is installed on the first pipe 13, a second check valve 16 is installed on the second pipe 14, and the cross-sectional area of the first pipe 13 > the cross-sectional area of the second pipe 14.

[0045] The flow meter 12 is used to count whether the filling flow rate reaches 85%.

[0046] From the start of filling to 85% of the filling volume, both the first pipe 13 and the second pipe 14 are fully opened, and pressure filling is carried out with a filling pressure of 0.5 - 1.0 mpa. When the filling volume reaches 85%, the first check valve 15 is closed, and only the second check valve 16 is opened, and filling is carried out until the full volume. Since the diameter of the second pipe 14 is small, under the same pressure, there will be no splashing of the liquid medicine.

[0047] Thus, it is possible to avoid the attachment of the liquid medicine to the outside of the bottle / bag, and further avoid the problem that the unsealed liquid medicine deteriorates in the air and affects the product quality.

[0048] Since the filling pressure remains unchanged, the filling flow rate drops relatively little. The filling process takes about 2.1 seconds of pressure, and the filling speed can be increased to 2500 bottles / hour, greatly improving the production efficiency.

[0049] Furthermore:

[0050] Both the first pipe 13 and the second pipe 14 are round pipes. The diameter range of the first pipe 13 is DN10 - DN50, and the diameter range of the second pipe 14 is DN4 - DN30.

[0051] On the premise of satisfying that the cross-sectional area of the first pipe 13 > the cross-sectional area of the second pipe 14, the diameters of the first pipe 13 and the second pipe 14 can be arbitrarily selected within the above ranges.

[0052] This application also provides an optional embodiment, which is only applicable to filling bags, such as Figures 2 - 8 shown:

[0053] A peritoneal dialysis solution bag filling device with controllable flow rate, including a frame 1, a filling pipe 2, a bag fixer 4, a bag neck constrictor 5 and a robotic arm 6;

[0054] The filling pipe 2 is arranged on the frame 1. One end of the filling pipe 2 is connected to a liquid source, and the other end of the filling pipe 2 forms a nozzle 21 with a cylindrical outer peripheral surface. An inner pipe 22 is arranged at the end of the nozzle 21. Both ends of the inner pipe 22 are located on the inner and outer sides of the nozzle 21 respectively. The inner diameter of the nozzle 21 > the inner diameter of the inner pipe 22. The liquid can flow through the inside of the inner pipe 22 and the gap between the nozzle 21 and the inner pipe 22. The bag 3 is sleeved on the nozzle 21 through the bag neck 31 and fixed by the bag fixer 4;

[0055] The bag neck constrictor 5 is arranged on the frame 1. The bag neck constrictor 5 is used to perform the action of constricting the bag neck 31 so that the inner wall of the bag neck 31 is close to the outer wall of the inner pipe 22, or the inner walls of the bag neck 31 are in contact with each other;

[0056] The robotic arm 6 is arranged on the frame 1. The execution part of the robotic arm 6 is connected to the bag neck constrictor 5. The robotic arm 6 is used to perform the action of driving the bag neck constrictor 5 to move so that the bag neck 31 clamped by the bag neck constrictor 5 is detached from the nozzle 21.

[0057] Wherein: the liquid source refers to a container in the filling device for storing peritoneal dialysis solution, which is connected to the nozzle 21 through a flow valve.

[0058] A microswitch 11 is arranged on the frame 1. The microswitch 11 is close to the nozzle 21. When the bag neck 31 is sleeved on the nozzle 21, the top of the bag neck 31 pushes the microswitch 11, and the microswitch 11 sends a signal to the controller. The controller sends working signals to the flow valve, the bag fixer 4, the bag constrictor, and the robotic arm 6.

[0059] Based on the technical solution disclosed in the above embodiment, the following steps are used in this embodiment to control the filling flow rate: S1, sleeving the bag neck 31 of the bag 3 on the nozzle 21;

[0060] S2, the bag fixer 4 fixes the bag 3 or the bag neck 31;

[0061] S3, the liquid source fills the bag 3 with liquid through the nozzle 21 and the inner pipe 22;

[0062] S4, when 2 / 3 of the bag 3 is filled, the bag neck constrictor 5 constricts the bag neck 31 so that its inner wall is close to the outer wall of the inner pipe 22 (contact or close is acceptable). At this time, the liquid channel formed by the gap between the nozzle 21 and the inner pipe 22 is blocked or narrowed, and the liquid can basically only flow through the inner pipe 22, so that the filling speed of the liquid decreases;

[0063] S5, after the bag 3 is filled, the bag neck constrictor 5 further clamps the bag neck 31, the bag fixer 4 releases the bag 3 and the bag neck 31, and the robotic arm 6 drives the bag neck constrictor 5 to move to remove the bag 3 from the nozzle 21 and the inner pipe 22, waiting for the next process to be carried out manually.

[0064] Furthermore, the present application also provides an alternative embodiment to solve the technical problem that the inner tube 22 hinders the operator from sleeving the bag neck 31 onto the nozzle 21 and also hinders the robotic arm 6 from driving the bag constrictor to remove the bag neck 31 from the nozzle 21.

[0065] The inner tube 22 is slidably connected to the nozzle 21. One end of the inner tube 22 close to the inside of the nozzle 21 is formed with a flange 221 that turns outward. The end of the nozzle 21 turns inward to form a limiting ring 211. The outer diameter of the flange 221 > the inner diameter of the limiting ring 211 > the outer diameter of the inner tube 22. An elastic member 23 is arranged between the flange 221 and the limiting ring 211. The elastic member 23 is arranged between the inner wall of the nozzle 21 and the outer wall of the inner tube 22, and the elastic member 23 makes the inner tube 22 always tend to move toward the inside of the nozzle 21.

[0066] In the above embodiment, the limiting ring 211 is formed by inwardly riveting the end of the existing nozzle 21, and the elastic member 23 is a spring, and its two ends respectively abut against the flange 221 and the limiting ring 211.

[0067] During the filling process, the flange 221 generates a driving force to move the inner tube 22 under the impact of the liquid flow, so that the inner tube 22 overcomes the resilience of the elastic member 23 and moves toward the outside of the nozzle 21, so that one end of the inner tube 22 extends out of the nozzle 21 and can contact the bag neck 31 when the bag neck constrictor 5 constricts the bag neck 31.

[0068] Before and after filling, the inner tube 22 retracts into the nozzle 21 under the resilience of the elastic member 23, so that the operator is not affected by the inner tube 22 when installing and disassembling the bag neck 31 from the nozzle 21.

[0069] Specifically, step S5 specifically includes the following steps: after the bag 3 is filled and there is no liquid flow impact, the inner tube 22 automatically resets under the resilience of the elastic member 23. The bag neck constrictor 5 further constricts the bag neck 31 so that the bag neck 31 is tightened. Then the bag fixator 4 releases the bag 3 and the bag neck 31. Finally, the robotic arm 6 drives the bag neck constrictor 5 to move so that the bag neck 31 is separated from the nozzle 21.

[0070] Furthermore, the present application also provides an alternative embodiment to solve the technical problem that the position where the inner tube 22 is driven by the elastic member 23 to contract into the nozzle 21 is uncontrollable.

[0071] A limiting structure 212 is formed or connected to a part of the nozzle 21 far from its end. The limiting structure 212 can prevent the inner tube 22 from passing along the nozzle 21. The distance between the limiting structure 212 and the end of the nozzle 21 > the axial length of the inner tube 22.

[0072] The limiting structure 212 can adopt a hollow sleeve. Insert the hollow sleeve into the inside of the nozzle 21 and glue it to the nozzle 21, so as to prevent the inner tube 22 from passing through on the premise that the liquid can flow.

[0073] Furthermore, the present application also provides an optional embodiment to solve the technical problem that it is difficult to accurately paste the hollow sleeve at a fixed position inside the nozzle 21.

[0074] The limiting structure 212 is a recess formed on the nozzle 21.

[0075] The limiting structure 212 is formed by radially squeezing the nozzle 21 inward. The limiting structure 212 can be simply formed without any spare parts, with a simple structure and low cost.

[0076] Furthermore, the present application also provides an optional embodiment to solve the technical problem that when the limiting structure 212 is formed by extrusion, the inner diameter of the nozzle 21 is reduced, affecting the flow rate of the fluid inside the nozzle 21.

[0077] The limiting structure 212 is formed on the nozzle 21 by extrusion, and the side of the extruded part bulges outward.

[0078] In the above embodiment, the forming method of the limiting structure 212 can be: pour a fluid medium, such as hydraulic oil, into the inside of the nozzle 21, then block both ends of the nozzle 21, and then radially squeeze an intermediate part of the nozzle 21 inward from both sides. Under the action of the hydraulic oil, the two sides of the extruded part bulge radially outward, so that an intermediate part of the nozzle 21 becomes flat, thereby forming the limiting structure 212 that can prevent the inner tube 22 from passing through it, and the change in its cross-sectional area is small, and the influence on the flow rate can be ignored.

[0079] It is also possible to adopt the technical means of first expanding the diameter of a section of the nozzle 21 and then partially squeezing the expanded part inward to form the limiting structure 212.

[0080] Furthermore, the present application also provides an optional embodiment to solve the technical problem that when the inner tube 22 is not closely attached to the inner wall of the nozzle 21, the inner tube 22 is prone to shaking and may scratch the inner wall of the bag neck 31.

[0081] One end of the flange 221 away from the inner tube 22 is folded inward to form a spherical ring body 222. The outer wall of the spherical ring body 222 is in clearance fit with the inner wall of the nozzle 21, and a water passing hole 223 penetrating the inner tube 22 is formed on the flange 221.

[0082] The spherical ring body 222 is used to limit the position of the inner tube 22 so that its center line coincides with the center line of the nozzle 21. Under the impact of the water flow, the inner tube 22 can only be vertically inserted into the inside of the bag neck 31 and will not scrape against the inner wall of the bag neck 31.

[0083] The water passing hole 223 is used for liquid to pass through, so as to prevent the flange 221 and the spherical ring body 222 from blocking the gap between the nozzle 21 and the inner tube 22.

[0084] Furthermore, the present application also provides an alternative embodiment to solve the technical problems that when the inner tube 22 is a circular tube, the technical means of converging the neck 31 of the whole-angle converging bag to make its inner wall close to the outer wall of the inner tube 22 is complex in structure and high in cost.

[0085] The cross-section of the inner tube 22 is oval.

[0086] The body of the inner tube 22 is flat, and the outer diameter of its longer end is basically equal to the inner diameter of the neck 31 of the bag. In this way, the technical means of converging the neck 31 of the bag to make it partially close to the shorter end of the inner tube 22 is relatively simple, and only needs to clamp the neck 31 of the bag inward from two angles.

[0087] Furthermore, the present application also provides an alternative embodiment to make the bag neck converger 5 applicable to the inner tube 22 in the above technical solution.

[0088] The bag neck converger 5 includes clamping blocks 51 and a second driver 52. The second driver 52 is arranged on the frame 1. There are 2 clamping blocks 51 which are connected to the actuating part of the second driver 52. The two clamping blocks 51 are respectively located below both sides of the nozzle 21. The second driver 52 is used to drive the two clamping blocks 51 to approach each other so that the inner wall of the neck 31 of the bag is close to the outer wall of the inner tube 22, or the inner walls of the neck 31 of the bag are in contact with each other;

[0089] The clamping blocks 51 are plastic fixtures, and the second driver 52 is a mechanical claw powered by a servo motor. The second driver 52 can drive the clamping blocks 51 to approach or move away from each other, and make the clamping blocks 51 stay at any position within the stroke range.

[0090] Furthermore, the present application also provides an alternative embodiment to solve the technical problem of how to remove the bag 3 from the nozzle 21.

[0091] The robotic arm 6 includes a third driver 61 and a connecting member 62. The third driver 61 is arranged on the frame 1. The connecting member 62 connects the actuating part of the third driver 61 and the bag neck converger 5. The third driver 61 is used to drive the clamping blocks 51 to move along an arc line that passes through the end of the nozzle 21 and is tangent to the center line of the nozzle 21.

[0092] The third driver 61 is a swing cylinder or a servo motor, which is used to drive the connecting member 62 to drive the bag neck constrictor 5 to approach or move away from the nozzle 21. When the movement trajectory of the clamping block 51 is an arc line and the arc line passes through the end of the nozzle 21 and is tangent to the center line of the nozzle 21, the clamping block 51 can smoothly remove the bag 3 from the filling pipe 2 and make the bag neck 31 face the feeding side, so as to facilitate the staff to insert the plug into the bag neck 31.

[0093] Furthermore, the present application also provides an optional embodiment to solve the technical problem of how to fix the bag 3 below the filling pipe 2.

[0094] The bag fixer 4 includes a pressing block 41 and a first driver 42. The pressing block 41 is fixedly connected to the execution part of the first driver 42. The first driver 42 is used to drive the pressing block 41 to contact the outer wall of the bag neck 31 so that the bag neck 31 is clamped between the pressing block 41 and the nozzle 21.

[0095] Specifically, the first driver 42 is a single-axis cylinder, the pressing block 41 is a plastic block, and the bag 3 is suspended below the filling pipe 2 by the friction force between the nozzle 21 and the bag neck 31.

[0096] The above embodiments are only exemplary embodiments of the present application and are not used to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements within the essence and protection scope of the present application, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present application.

Claims

1. A peritoneal dialysis solution bag filling device with controllable flow rate, characterized in that, it includes a frame (1), a filling pipe (2) arranged on the frame (1), one end of the filling pipe (2) is connected to a liquid source through a flow meter (12), the other end of the filling pipe (2) forms a nozzle (21) with a cylindrical outer peripheral surface, an inner pipe (22) is arranged at the end of the nozzle (21), both ends of the inner pipe (22) are located inside and outside the nozzle (21) respectively, the inner diameter of the nozzle (21) > the inner diameter of the inner pipe (22), and liquid can flow through the inside of the inner pipe (22) and the gap between the nozzle (21) and the inner pipe (22). A bag (3) is sleeved on the nozzle (21) through a bag neck (31) and fixed by a bag fixer (4); a bag neck constrictor (5) arranged on the frame (1), the bag neck constrictor (5) is used to perform the action of constricting the bag neck (31) so that the inner wall of the bag neck (31) is close to the outer wall of the inner pipe (22), or so that the inner walls of the bag neck (31) are in contact with each other; a robotic arm (6) arranged on the frame (1), the execution part of the robotic arm (6) is connected to the bag neck constrictor (5), and the robotic arm (6) is used to perform the action of driving the bag neck constrictor (5) to move so that the bag neck (31) clamped by the bag neck constrictor (5) is detached from the nozzle (21); The inner pipe (22) is slidably connected to the nozzle (21). One end of the inner pipe (22) close to the inside of the nozzle (21) forms a flange (221) that is turned outwards. The end of the nozzle (21) is turned inwards to form a limiting ring (211). The outer diameter of the flange (221) > the inner diameter of the limiting ring (211) > the outer diameter of the inner pipe (22). An elastic member (23) is arranged between the flange (221) and the limiting ring (211). The elastic member (23) is arranged between the inner wall of the nozzle (21) and the outer wall of the inner pipe (22), and the elastic member (23) makes the inner pipe (22) always have a tendency to move towards the inside of the nozzle (21); A limiting structure (212) is formed or connected to a part of the nozzle (21) far from its end. The limiting structure (212) can prevent the inner pipe (22) from passing through the nozzle (21). The distance between the limiting structure (212) and the end of the nozzle (21) > the axial length of the inner pipe (22); One end of the flange (221) far from the inner pipe (22) is turned inwards to form a spherical ring body (222). The outer wall of the spherical ring body (222) is in clearance fit with the inner wall of the nozzle (21). A water passing hole (223) penetrating the inner pipe (22) is formed on the flange (221); The bag neck constrictor (5) includes clamping blocks (51) and a second driver (52). The second driver (52) is arranged on the frame (1). There are two clamping blocks (51) which are connected to the actuating part of the second driver (52). The two clamping blocks (51) are respectively located below both sides of the nozzle (21). The second driver (52) is used to drive the two clamping blocks (51) to approach each other so that the inner wall of the bag neck (31) is close to the outer wall of the inner tube (22), or so that the inner walls of the bag neck (31) are in contact with each other. The filling tube (2) is connected to the flowmeter (12) through the first pipeline (13) and the second pipeline (14) simultaneously. A first on-off valve (15) is installed on the first pipeline (13), a second on-off valve (16) is installed on the second pipeline (14), and the cross-sectional area of the first pipeline (13) > the cross-sectional area of the second pipeline (14).

2. A peritoneal dialysis solution bag filling device with controllable flow rate according to claim 1, characterized in that Both the first pipeline (13) and the second pipeline (14) are round tubes. The pipe diameter range of the first pipeline (13) is DN10 - DN50, and the pipe diameter range of the second pipeline (14) is DN4 - DN30.

3. A peritoneal dialysis solution bag filling device with controllable flow rate according to claim 1, characterized in that The limiting structure (212) is a depression formed on the nozzle (21); the limiting structure (212) is formed on the nozzle (21) by extrusion, and the side of the extruded part bulges outwards.

4. A peritoneal dialysis solution bag filling device with controllable flow rate according to claim 3, characterized in that The cross-section of the inner tube (22) is oblong.

5. A peritoneal dialysis solution bag filling device with controllable flow rate according to claim 4, characterized in that The robotic arm (6) includes a third driver (61) and a connecting member (62). The third driver (61) is arranged on the frame (1). The connecting member (62) connects the actuating part of the third driver (61) and the bag neck constrictor (5). The third driver (61) is used to drive the clamping block (51) to move along an arc line, and the arc line passes through the end of the nozzle (21) and is tangent to the center line of the nozzle (21).

Images