Transfusion regulator and infusion apparatus

Abstract

The infusion regulator comprises a first shell, a second shell and a third shell which are arranged in the flowing direction of infusion liquid, the first shell, the second shell and the third shell can rotate relatively, a first connecting pipe is arranged in the first shell, and a second connecting pipe is arranged in the second shell. A first groove extending in the circumferential direction of the first shell is formed in the side, away from the first connecting pipe, of the first shell, the first groove communicates with the first connecting pipe, and the depth of the first groove is decreased in the extending direction of the first groove; a first through hole capable of being communicated with the first groove is formed in the second shell, a second groove extending in the circumferential direction of the second shell is formed in the side, away from the first shell, of the second shell, the second groove is communicated with the first through hole, and the depth of the second groove is decreased in the extending direction of the second groove; and a second connecting pipe which can be communicated with the second groove is arranged in the third shell. The infusion regulator provided by the invention can improve the infusion precision.

Description

Infusion regulators and infusion sets Technical Field

[0001] This invention relates to the field of medical device technology, specifically to an infusion regulator and an infusion set. Background Technology

[0002] In clinical intravenous infusion, existing disposable infusion sets (including gravity, precision, and quantitative sets) typically cannot address the impact of varying infusion height, fluid level, and concentration on infusion accuracy. To improve the accuracy of infusion volume and dosage, infusion pumps are usually used to control the infusion rate and dosage via the infusion tubing. However, infusion pumps are complex to operate and costly. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, embodiments of the present invention provide an infusion regulator and infusion set, which can improve the accuracy of infusion, reduce costs and clinical use risks.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] The first aspect of this invention discloses an infusion regulator, comprising a first housing, a second housing, and a third housing arranged along the infusion fluid flow direction, wherein the first housing, the second housing, and the third housing are rotatable relative to each other, wherein:

[0006] The first housing is provided with a first connecting pipe, and the first housing is provided with a first groove extending circumferentially along the side opposite to the first connecting pipe. The first groove communicates with the first connecting pipe, and the groove depth decreases along its extension direction.

[0007] The second housing has a first through hole that can communicate with the first groove. The second housing has a second groove extending circumferentially along the side opposite to the first housing. The second groove communicates with the first through hole. The depth of the second groove decreases along its extension direction.

[0008] The third housing is provided with a second connecting pipe that can communicate with the second groove.

[0009] The infusion regulator described above controls the flow rate of the liquid by setting a first groove with different depths, making the flow rate unaffected by the liquid's height and gravity. It also controls the infusion volume by setting a second groove with different depths, thereby ensuring uniform distribution of the drug in the patient's body and reducing drug concentration fluctuations. This dual control mechanism greatly reduces the errors in infusion accuracy caused by the gravity and height of the liquid during infusion. The regulator is simple in structure, easy to use, and low in cost.

[0010] Furthermore, it also includes a first sealing gasket, which is disposed between the first groove and the second housing. The outer periphery of the first sealing gasket has a plurality of first protrusions, and the first sealing gasket has a second through hole extending along its thickness, which can communicate with the first groove. The first sealing gasket can prevent liquid leakage at the connection between the first housing and the second housing, ensuring the sealing of the infusion process.

[0011] Furthermore, it also includes a first sealing portion, which is disposed on the side of the second housing facing the first housing. The first sealing portion has a plurality of first mounting grooves corresponding to the first protrusion, and the first protrusion is installed in the first mounting groove. Through the cooperation between the first protrusion and the first mounting groove, the first sealing gasket can be firmly installed in the first sealing portion, preventing the first sealing gasket from shifting during infusion, thereby further ensuring the sealing performance of the connection between the first housing and the second housing.

[0012] Furthermore, it also includes a second sealing gasket, which is disposed between the second groove and the third housing. The outer periphery of the second sealing gasket has multiple second protrusions, and the second sealing gasket has a third through hole extending along its thickness, which can communicate with the second groove. The second sealing gasket can prevent liquid leakage at the connection between the second housing and the third housing, ensuring the sealing of the infusion process.

[0013] Furthermore, it also includes a second sealing portion, which is disposed on the side of the third housing facing the second housing. The second sealing portion has a plurality of second mounting grooves corresponding to the second protrusion, and the second protrusion is installed in the second mounting grooves. Through the cooperation between the second protrusion and the second mounting groove, the second sealing gasket can be firmly installed in the second sealing portion, preventing the second sealing gasket from shifting during infusion, thereby further ensuring the sealing performance of the connection between the second housing and the third housing.

[0014] Furthermore, the third housing has a positioning post on the side facing the second housing. The positioning post includes a connecting rod that can pass through the second housing and the first housing, and at least two spaced positioning parts, which are located at the end of the connecting rod opposite to the third housing. The at least two spaced positioning parts can elastically deform when compressed, allowing them to pass through the first housing and spring back to their original position, thus locking into the first housing to connect the first housing, the second housing, and the third housing. This design is simple and has high assembly efficiency.

[0015] Furthermore, the first housing is provided with a positioning boss, which includes a first connecting portion extending in a first direction, a second connecting portion extending from the extension end of the first connecting portion in a second direction, and a third connecting portion extending from the extension end of the second connecting portion in a third direction. The positioning portion can pass through the positioning boss and connect with the third connecting portion. The arrangement of the first, second, and third connecting portions allows the diameter of the first end of the positioning boss to be smaller than the diameter of the second end, thereby facilitating the snap-fit ​​connection between the positioning portion and the third connecting portion.

[0016] Furthermore, the outer side of the positioning part has an inclined surface, and a gap exists between the second end of the inclined surface and the connecting rod. The inclined surface is configured such that, along the axial direction of the adjuster, the diameter of the positioning part gradually increases from the first end to the second end of the inclined surface. The gap is configured such that, when the positioning part passes through the positioning boss, the end face of the second end of the inclined surface can abut against the end face of the third connecting part on the side opposite to the connecting rod. When the positioning pin is inserted into the positioning boss, due to the gradually increasing diameter design of the positioning part, the positioning part can be engaged on the end face of the third connecting part, thereby connecting the first housing, the second housing, and the third housing.

[0017] Furthermore, the second housing includes a base plate, a first side portion disposed on one side of the base plate, and a second side portion disposed on the other side of the base plate. The first side portion is fitted onto the outside of the first housing, and the third housing is fitted onto the outside of the second side portion. The first side portion and the first housing, as well as the second side portion and the third housing, are in a clearance fit. This clearance fit allows the first, second, and third housings to maintain a tight fit while still allowing relative rotation, thus reducing wear caused by friction among the first, second, and third housings.

[0018] A second aspect of the present invention discloses an infusion set, comprising:

[0019] First infusion tube;

[0020] A puncture needle and an air release valve are located at the first end of the first infusion tube;

[0021] A dropper connected to the first infusion tube;

[0022] As described in any of the first aspects, the second end of the first infusion tube is connected to the first connecting tube of the infusion regulator;

[0023] The second infusion tube, the first end of which is connected to the second connecting tube of the infusion regulator;

[0024] A filter and a flow stop clamp connected to the second infusion tube;

[0025] A detachable injection needle connected to the second end of the second infusion tube.

[0026] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0027] The infusion regulator of this application can control the flow rate of the liquid by setting a first groove with different groove depths, so that the flow rate of the liquid is not affected by its height and gravity. By setting a second groove with different groove depths, the infusion volume of the liquid can be controlled, thereby making the drug evenly distributed in the patient's body and reducing drug concentration fluctuations. Through the dual control mechanism, the error of infusion accuracy caused by the gravity and height of the liquid during infusion can be greatly reduced. It has a simple structure, is easy to use, and has low cost.

[0028] To make the above and other objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 is a cross-sectional view of an infusion regulator provided in an embodiment of the present invention;

[0031] Figure 2 is a schematic diagram of a first angle of a first housing provided in an embodiment of the present invention;

[0032] Figure 3 is a second angle schematic diagram of a first housing provided in an embodiment of the present invention;

[0033] Figure 4 is a schematic diagram of a second housing at a first angle provided in an embodiment of the present invention;

[0034] Figure 5 is a schematic diagram of a second angle of a second housing provided in an embodiment of the present invention;

[0035] Figure 6 is a schematic diagram of a third housing at a first angle according to an embodiment of the present invention;

[0036] Figure 7 is a second-angle schematic diagram of a third housing provided in an embodiment of the present invention;

[0037] Figure 8 is a structural diagram of a sealing gasket provided in an embodiment of the present invention;

[0038] Figure 9 is a structural diagram of an infusion regulator provided in an embodiment of the present invention;

[0039] Figure 10 is a structural diagram of an infusion set provided in an embodiment of the present invention.

[0040] The reference numerals in the above figures are as follows: 1. First housing; 11. First outer shell; 111. First stop rib; 12. First base; 121. First connecting hole; 122. Positioning boss; 1221. First connecting part; 1222. Second connecting part; 1223. Third connecting part; 13. First connecting pipe; 14. First groove; 15. First sealing rib; 16. Raised ridge; 2. Second housing; 21. Base plate; 211. First through hole; 212. First sealing part; 2121. First mounting groove; 22. First side; 221. Second stop rib; 23. Second side; 24. Second groove; 25. Second sealing rib; 3. Third housing 31. Body; 32. Second outer shell; 32. Second base; 321. Second connecting hole; 322. Second sealing part; 3221. Second mounting groove; 323. Positioning post; 3231. Connecting rod; 3232. Positioning part; 33. Second connecting pipe; 34. Reinforcing rib; 4. First sealing gasket; 41. First protrusion; 42. Second through hole; 5. Second sealing gasket; 51. Second protrusion; 52. Third through hole; 61. First infusion tube; 62. Puncture needle; 63. Exhaust valve; 64. Dropper; 65. Second infusion tube; 66. Filter; 67. Flow stop clamp; 68. Injection needle; 681. Connector; 682. Conduit; 683. Needle tip. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. In addition, the accompanying drawings of the present invention are only simple illustrations and are not depictions based on actual dimensions, as stated in advance.

[0042] In this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "forward," "backward," "between," "near," and "farthest" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. It should also be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0043] It should be understood that while terms such as "first," "second," and "third" may be used in this document to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another, or one signal from another. Furthermore, the term "or" as used herein should, as appropriate, include any combination of one or more of the related listed items.

[0044] Referring to Figures 1 to 9, an embodiment of this application provides an infusion regulator, including a first housing 1, a second housing 2, and a third housing 3 arranged along the infusion fluid flow direction.

[0045] Referring to Figures 1, 2, and 3, the first housing 1 includes a first outer shell 11 and a first base 12 disposed at the second end of the first outer shell 11. The first outer shell 11 has an opening at its first end. The first base 12 is provided with a first connecting hole 121 extending through its thickness direction. A first connecting pipe 13 is provided at the first connecting hole 121. The first connecting pipe 13 extends from its connection with the first base 12 toward the opening of the first outer shell 11. The first connecting pipe 13 is provided with a first pipe hole, which communicates with the first connecting hole 121 to allow the infusion fluid to flow.

[0046] The first base 12 has a first groove 14 extending circumferentially along the side opposite to the first connecting pipe 13. The first groove 14 is connected to the first connecting pipe 13 through a first connecting hole 121 and a first pipe hole. The groove depth of the first groove 14 decreases along its extending direction. In this embodiment, the circumferential direction can be clockwise or counterclockwise.

[0047] In one possible embodiment, the first groove 14 extends circumferentially along the first base 12, with a discontinuous arc shape between its starting and ending points. Furthermore, the groove depth at the starting point of the first groove 14 is greater than the depth at the ending point. The first connecting hole 121 is located at the starting point of the first groove 14. When the first connecting hole 121 is positioned at this location, the deepest point of the first groove 14 serves as the point of maximum flow rate, acting as a flow rate calibration reference point. Medical personnel can more accurately adjust the flow rate based on this reference point, thereby improving the precision and convenience of the operation and avoiding the problem of increased flow rate error caused by difficulty in finding a reference point when the first connecting hole 121 is located at other depths of the first groove 14.

[0048] In one possible embodiment, a first sealing rib 15 is provided on both the inner and outer sides of the first groove 14 to prevent liquid leakage from the connection between the first groove 14 and surrounding components. Optionally, the first sealing rib 15 is made of an elastic material to better conform to the contact surface.

[0049] In one possible embodiment, the outer side of the first housing 11 is provided with a plurality of protrusions 16. The plurality of protrusions 16 can enhance the friction of the outer surface of the first housing 11, making it convenient for personnel to operate the infusion regulator, and can enhance the structural strength of the first housing 1.

[0050] Referring to Figures 1, 4, and 5, the second housing 2 includes a base plate 21, a first side portion 22 disposed on one side of the base plate 21, and a second side portion 23 disposed on the other side of the base plate 21. When the first housing 1, the second housing 2, and the third housing 3 are connected, the first side portion 22 is fitted onto the outside of the first housing 1, and the third housing 3 is fitted onto the outside of the second side portion 22. The first side portion 22 and the first housing 1, and the second side portion 23 and the third housing 3, are all clearance fits, so that the first housing 1, the second housing 2, and the third housing 3 can rotate relative to each other under the action of external force, thereby adjusting the communication position between the first groove 14 and the second through hole 42, and the communication position between the second groove 24 and the second connecting pipe 33, thereby changing the groove depth communication position to adjust the flow rate.

[0051] The base plate 21 is provided with a first through hole 211, which can be connected to the first groove 14 by rotating the first housing 1 or the second housing 2, thereby allowing liquid to flow.

[0052] In one possible embodiment, a first scale line is provided on the outer periphery of the second housing 2. The first scale line is used by medical staff to directly read the current flow rate and speed information of the liquid from the scale line, which facilitates the adjustment of the infusion process without the need for additional measuring tools or complex calculations, thereby greatly simplifying the operation process of medical staff and reducing the difficulty of operation.

[0053] Optionally, the first scale line can be located on the first side portion 22. The value of the first scale line corresponds to the depth of the first groove 14 from deep to shallow, and the first scale line can be used to indicate the flow rate in ml / h. For example, the value of the first scale line corresponding to a groove depth of 1mm is 300ml / h, and the value of the first scale line corresponding to a groove depth of 0.8mm is 250ml / h. The specific data can be set according to the actual situation.

[0054] In one possible embodiment, the bottom of the first housing 11 is provided with a first visual stop rib 111. The first visual stop rib 111 can be aligned with a specific value so that the value of the first scale line can be read intuitively, avoiding visual errors caused by the angle of view when medical staff or patients observe the infusion situation, thereby ensuring the accuracy of the adjustment.

[0055] The bottom plate 21 has a second groove 24 extending circumferentially along the side opposite to the first housing 1. The second groove 24 communicates with the first through hole 211, and the groove depth of the second groove 24 decreases along its extending direction. In this embodiment, the circumferential direction can be clockwise or counterclockwise.

[0056] In one possible embodiment, the second groove 24 extends discontinuously from its starting point to its ending point, i.e., the second groove 24 is a discontinuous arc shape. Furthermore, the groove depth at the starting point of the second groove 24 is greater than the groove depth at its ending point. The first through hole 211 is located at the starting point of the second groove 24. When the first through hole 211 is positioned at this location, the deepest point of the second groove 24 serves as the point of maximum flow rate, acting as a flow rate calibration reference point. Medical personnel can more accurately adjust the flow rate based on this reference point, thereby improving the precision and convenience of the operation and avoiding the problem of increased flow rate error caused by the difficulty in finding a reference point when the first through hole 211 is located at other depths of the second groove 24.

[0057] In one possible embodiment, a second sealing rib 25 is provided on both the inner and outer sides of the second groove 24 to prevent liquid leakage from the connection between the second groove 24 and surrounding components. Optionally, the second sealing rib 25 is made of an elastic material to better conform to the contact surface.

[0058] In one possible embodiment, a first sealing gasket 4 is provided between the first housing 1 and the second housing 2. The first sealing gasket 4 is located between the first groove 14 and the second housing 2. The first sealing gasket 4 is provided with a second through hole 42 that extends through its thickness. The second through hole 42 can be connected to the first groove 14 by rotating the first housing 1 or the second housing 2, thereby allowing liquid to flow.

[0059] In order to fix the first sealing gasket 4, a plurality of first protrusions 41 are provided on the outer periphery of the first sealing gasket 4, and a first sealing part 212 is provided on the side of the bottom plate 21 facing the first housing 1. A plurality of first mounting grooves 2121 corresponding to the first protrusions 41 are provided in the first sealing part 212, and the first protrusions 41 are installed in the first mounting grooves 2121.

[0060] Referring to Figures 1, 6, and 7, the third housing 3 includes a second outer shell 31 and a second base 32 disposed at the second end of the second outer shell 31. The first end of the third outer shell 31 has an opening. The second base 32 is provided with a second connecting hole 321 extending through its thickness direction. A second connecting pipe 33 is provided at the second connecting hole 321. The second connecting pipe 33 extends from its connection with the second base 32 in a direction away from the second housing 2. The second connecting pipe 33 is provided with a second pipe hole, which communicates with the second connecting hole 321. When the second housing 2 rotates, the second connecting hole 321 can communicate with the second groove 24, thereby allowing the infusion fluid to be transported to other components through the second connecting pipe 33.

[0061] In one possible embodiment, a second scale line is provided on the outer periphery of the third housing 3. The second scale line is used by medical staff to directly read the current flow rate and speed information of the liquid from the scale line, which facilitates the adjustment of the infusion process without the need for additional measuring tools or complex calculations, thereby greatly simplifying the operation process of medical staff and reducing the difficulty of operation.

[0062] Optionally, the second scale line can be located on the second outer casing 31. The value of the second scale line corresponds to the depth of the second groove 24 from deep to shallow, and the second scale line can be used to indicate the flow rate in ml / h. For example, the value of the second scale line corresponding to a groove depth of 1 mm is 300 ml / h, and the value of the second scale line corresponding to a groove depth of 0.8 mm is 250 ml / h. The specific data can be set according to the actual situation.

[0063] In one possible embodiment, a second visual stop rib 221 is provided at the bottom of the second side 22. The second visual stop rib 221 can be aligned with a specific value so that the value of the second scale line can be read intuitively, avoiding visual errors caused by the angle of view when medical staff or patients observe the infusion, thereby ensuring the accuracy of the adjustment.

[0064] To enhance the structural strength of the third housing 3, the second base 32 is provided with a plurality of reinforcing ribs 34 on the side opposite to the second housing 2, and the plurality of reinforcing ribs 34 are arranged at intervals along the surface of the second base 32.

[0065] In one possible embodiment, a second sealing gasket 5 is provided between the second housing 2 and the third housing 3. The second sealing gasket 5 is located between the second groove 24 and the third housing 3. The second sealing gasket 5 is provided with a third through hole 52 that extends along its thickness. The third through hole 52 can be connected to the second groove 24 by rotating the second housing 2 or the third housing 3, thereby allowing liquid to flow.

[0066] In order to fix the second sealing gasket 5, a plurality of second protrusions 51 are provided on the outer periphery of the second sealing gasket 5. The second base 32 is provided on the side facing the second housing 2 with a second sealing part 322. The second sealing part 322 is provided with a plurality of second mounting grooves 3221 corresponding to the second protrusions 51. The second protrusions 51 are installed in the second mounting grooves 3221.

[0067] It should be noted that the structures of the first sealing gasket 4 and the second sealing gasket 5 may be the same or different. In this embodiment, the structures of the first sealing gasket 4 and the second sealing gasket 5 are the same; therefore, the accompanying drawings only show the structural diagram of the first sealing gasket 4 for illustration.

[0068] The first housing 1, the second housing 2, and the third housing 3 are detachably connected. In one possible embodiment, the first base 12 is provided with a first connecting hole that extends through its thickness, the bottom plate 21 is provided with a second connecting hole that extends through its thickness, and the second base 32 is provided with a positioning post 323 on the side facing the second housing 2. The positioning post 323 passes through the first connecting hole and the second connecting hole and is fastened to the first base 12.

[0069] Specifically, the positioning post 323 includes a connecting rod 3231 that can pass through the second connecting hole and the first connecting hole, and four positioning parts 3232 that are spaced apart and have the same structure. The four positioning parts 3232 are located at the end of the connecting rod 3231 that is away from the third housing 3.

[0070] The outer side of the positioning part 3232 has an inclined surface, and there is a gap between the second end of the inclined surface and the connecting rod 3231. The inclined surface is configured such that the diameter of the positioning part 3232 gradually increases from the first end to the second end along the axial direction of the adjuster. The gap is configured such that when the positioning part 3232 passes through the first connecting hole, the end face of the second end of the inclined surface can abut against the end face of the first connecting hole on the side away from the connecting rod 3231. When the positioning part 3232 passes through the first connecting hole, the inclined surface abuts against the inner wall of the first connecting hole, the positioning part 3232 is squeezed and produces elastic deformation, the four spaced positioning parts 3232 move closer to each other, so that the positioning part 3232 passes through the first connecting hole, and after the part of the positioning part 3232 with the inclined surface has completely passed through the first connecting hole, at least two spaced positioning parts 3232 spring back to their original position, the second end of the inclined surface forms a snap connection with the end face of the first connecting hole on the side opposite to the connecting rod 3231, so that the positioning post connects the first housing 1, the second housing 2 and the third housing 3. The structure is simple and the installation is convenient.

[0071] In one possible embodiment, a positioning boss 122 is provided on the side of the first base 12 away from the first groove 14. The positioning boss 122 has a positioning hole communicating with the first connecting hole along the axial direction of the adjuster. The positioning boss 122 includes a first connecting portion 1221 extending in a first direction, a second connecting portion 1222 extending from the extension end of the first connecting portion 1221 in a second direction, and a third connecting portion 1223 extending from the extension end of the second connecting portion 1222 in a third direction. The first direction, the second direction, and the third direction are configured such that the diameter of the end of the positioning boss 122 away from the first base 12 is smaller than the diameter of the end near the first base 12, so that the second end of the inclined surface forms a snap-fit ​​connection with the end face of the positioning boss 122 away from the connecting rod 3231.

[0072] Optionally, there is an angle between the first direction and the second direction, and an angle between the second direction and the third direction. The size of the angle can be set according to the actual situation, for example, it can be 0° to 180°.

[0073] The working principle of the infusion regulator described in this application embodiment is as follows: According to the infusion requirements, the first housing 1 is rotated according to the first scale line on the outer periphery of the second housing 2 to reach a first preset value. At this time, the groove depth position of the first groove 14 corresponding to the first preset value is connected to the second through hole 42 of the first sealing gasket 4. The second housing 2 is rotated according to the second scale line on the outer periphery of the third housing 3 to reach a second preset value. At this time, the groove depth position of the second groove 24 corresponding to the second preset value is connected to the third through hole 52 of the second sealing gasket 5. Liquid flows into the first groove 14 through the first connecting pipe 13, then flows into the second groove 24 through the second through hole 42 of the first sealing gasket 4, and finally flows into the second connecting pipe 33 through the third through hole 52 of the second sealing gasket 5. The first preset value and the second preset value can be the same or different, depending on the actual situation.

[0074] Example 2: Referring to Figure 10, this embodiment of the application also provides an infusion set, the infusion set comprising:

[0075] First infusion tube 61;

[0076] A puncture needle 62 and an exhaust valve 63 are provided at the first end of the first infusion tube 61;

[0077] A dropper 64 connected to the first infusion tube 61;

[0078] As described in the above embodiment, the second end of the first infusion tube 61 is connected to the first connecting tube 13 of the infusion regulator.

[0079] The second infusion tube 65, the first end of the second infusion tube 65 is connected to the second connecting tube 33 of the infusion regulator;

[0080] A filter 66 and a flow stop clamp 67 are connected to the second infusion tube 65;

[0081] An injection needle 68 is detachably connected to the second end of the second infusion tube 65.

[0082] In one possible embodiment, the second end of the second infusion tube 65 is provided with a detachable fastener, and the injection needle 68 includes a connector 681, a catheter 682 and a needle tip 683 connected to the fastener.

[0083] Specific embodiments have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this invention. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. An infusion regulator, characterized in that, The system includes a first housing, a second housing, and a third housing arranged along the direction of infusion fluid flow. The first housing, the second housing, and the third housing are rotatable relative to each other. Specifically: the first housing contains a first connecting pipe; the first housing has a first groove extending circumferentially along its side away from the first connecting pipe, communicating with the first connecting pipe, and the groove depth decreases along its extension direction; the second housing contains a first through hole communicating with the first groove; the second housing has a second groove extending circumferentially along its side away from the first housing, communicating with the first through hole, and the groove depth decreases along its extension direction; the third housing contains a second connecting pipe communicating with the second groove.

2. The infusion regulator according to claim 1, characterized in that, It also includes a first sealing gasket, which is disposed between the first groove and the second housing. The outer periphery of the first sealing gasket is provided with a plurality of first protrusions, and the first sealing gasket is provided with a second through hole that extends through its thickness. The second through hole can communicate with the first groove.

3. An infusion regulator according to claim 2, characterized in that, It also includes a first sealing part, which is located on the side of the second housing facing the first housing. The first sealing part has a plurality of first mounting grooves corresponding to the first protrusion, and the first protrusion is installed in the first mounting groove.

4. An infusion regulator according to claim 1, characterized in that, It also includes a second sealing gasket, which is disposed between the second groove and the third housing. The outer periphery of the second sealing gasket is provided with a plurality of second protrusions, and the second sealing gasket is provided with a third through hole that extends through its thickness. The third through hole can communicate with the second groove.

5. An infusion regulator according to claim 4, characterized in that, It also includes a second sealing part, which is located on the side of the third housing facing the second housing. The second sealing part has a plurality of second mounting grooves corresponding to the second protrusion, and the second protrusion is installed in the second mounting groove.

6. An infusion regulator according to claim 1, characterized in that, The third housing has a positioning post on the side facing the second housing. The positioning post includes a connecting rod that can pass through the second housing and the first housing, and at least two positioning parts spaced apart. The at least two positioning parts are located at the end of the connecting rod away from the third housing.

7. An infusion regulator according to claim 6, characterized in that, The first housing is provided with a positioning boss. The positioning boss includes a first connecting portion extending in a first direction, a second connecting portion extending from the extension end of the first connecting portion in a second direction, and a third connecting portion extending from the extension end of the second connecting portion in a third direction. The positioning portion can pass through the positioning boss and connect with the third connecting portion.

8. An infusion regulator according to claim 7, characterized in that, The outer side of the positioning part has an inclined surface, and there is a gap between the second end of the inclined surface and the connecting rod. The inclined surface is configured such that the diameter of the positioning part gradually increases from the first end to the second end of the inclined surface along the axial direction of the adjuster. The gap is configured such that when the positioning part passes through the positioning boss, the end face of the second end of the inclined surface can abut against the end face of the third connecting part on the side away from the connecting rod.

9. An infusion regulator according to claim 1, characterized in that, The second housing includes a base plate, a first side portion disposed on one side of the base plate, and a second side portion disposed on the other side of the base plate. The first side portion is sleeved on the outside of the first housing, and the third housing is sleeved on the outside of the second side portion. The first side portion and the first housing, as well as the second side portion and the third housing, are clearance fits.

10. An infusion set, characterized in that, include: First infusion tube; A puncture needle and an air release valve are located at the first end of the first infusion tube; A dropper connected to the first infusion tube; The infusion regulator as described in any one of claims 1 to 9, wherein the second end of the first infusion tube is connected to the first connecting tube of the infusion regulator; the second infusion tube, wherein the first end of the second infusion tube is connected to the second connecting tube of the infusion regulator; a filter and a flow stop clamp connected to the second infusion tube; and an injection needle detachably connected to the second end of the second infusion tube.

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