Multi-channel connecting joint

Abstract

The utility model discloses a multi-channel connector which comprises a connector body, a first connector and a connecting rib, and the connector body, the first connector and the connecting rib are of an integrated structure. The joint main body comprises a liquid passing cavity and a plurality of liquid inlets, the liquid inlets are communicated with the liquid passing cavity through a plurality of liquid inlet pipelines, the liquid passing cavity comprises a flow guide bottom surface, and a first liquid outlet is formed in the flow guide bottom surface; the first connector comprises a connecting pipe and a connecting cylinder, the connecting pipe is communicated with the first liquid outlet, the connecting cylinder is arranged on the outer side of the connecting pipe in a sleeving mode, an annular containing cavity is formed between the connecting cylinder and the connecting pipe, and a first thread is arranged on the inner wall of the connecting cylinder; the connecting rib is arranged at the joint of the connector body and the first connector. According to the multi-channel connector, the multi-channel connector is manufactured through the integrated injection molding technology, the technical problems that in the prior art, due to the fact that the connecting positions of the infusion connector, the infusion tube and the male connector are bonded in an adhesive mode, adhesion is not firm, and breaking or liquid leakage is prone to occurring are solved, and the multi-channel connector has high practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a multi-channel connection joint. Background Art

[0002] Clinically, for patients suffering from complex diseases, multiple drugs need to be infused into the patient's body for treatment. When multiple drugs are infused simultaneously, a multi-channel infusion joint is often used to connect multiple infusion bottles to the infusion device. The infusion device in clinical application includes an infusion bottle, an infusion tube, an infusion joint, and an indwelling needle connected in series in sequence.

[0003] Currently, most of the commonly used indwelling needles on the market are used in cooperation with accessory joints. In the prior art, the accessory joint of the indwelling needle is generally a female joint. When the infusion joint is connected to the indwelling needle, the infusion joint is first connected to a male joint through an infusion tube, and then the male joint is connected to the accessory joint (female joint) of the indwelling needle. Glue is used for bonding at the connection of the infusion joint, the infusion tube, and the male joint. However, in the assembly process, the gluing method still has some potential hazards. Since the firmness of the bonding is easily affected by the properties of the glue, when the glue denatures or the amount of glue is insufficient, the bonding is not firm. At this time, leakage or disconnection is likely to occur at the connection of the infusion joint, the infusion tube, and the male joint, and these situations will affect the normal use of the infusion device. Therefore, the gluing method used in the prior art to bond the connection of the infusion joint, the infusion tube, and the male joint has the technical defect of insecure bonding. Summary of the Utility Model

[0004] A multi-channel connection joint provided by the utility model aims to solve the technical defect that the gluing method used in the prior art to bond the connection of the infusion joint, the infusion tube, and the male joint has insecure bonding.

[0005] The utility model discloses a multi-channel connection joint, including: a joint body and a first joint, the joint body and the first joint are of an integral structure; the joint body includes: a liquid passing cavity, a plurality of liquid inlet ports, and a plurality of liquid inlet pipelines, the plurality of liquid inlet ports are connected to the liquid passing cavity through the plurality of liquid inlet pipelines, the liquid passing cavity includes a diversion bottom surface, a first liquid outlet is provided on the diversion bottom surface, and the first liquid outlet is connected to the first joint; the first joint includes a connecting pipe and a connecting cylinder, the connecting pipe is connected to the first liquid outlet, the connecting cylinder is sleeved outside the connecting pipe and forms an annular accommodating cavity between the connecting cylinder and the connecting pipe, a first thread is provided on the inner wall of the connecting cylinder, the connecting cylinder includes a first opening, the first opening is arranged at one end of the connecting cylinder far away from the joint body, and the end of the connecting pipe far away from the first liquid outlet protrudes from the end surface of the opening end of the first opening of the connecting cylinder.

[0006] Among them, the connecting cylinder includes a sleeve and a connecting cover. The first opening is provided at one end of the sleeve, and the connecting cover is covered on the end of the sleeve away from the first opening. A first hole is provided at the center position of the connecting cover, and the connecting pipe passes through the first hole and is connected to the connecting cover. The sleeve is arranged outside the connecting pipe and forms an annular accommodating cavity between the sleeve and the connecting pipe. The sleeve is arranged parallel to the connecting pipe. The first thread is arranged on the inner wall of the sleeve.

[0007] Among them, a connecting rib is also provided at the connection between the joint body and the first joint. The connecting rib is respectively connected to the outer side wall of the liquid passing cavity, the outer wall of the connecting pipe, and the upper side surface of the connecting cover.

[0008] Preferably, multiple liquid inlet pipelines are arranged in parallel and separated by a partition part.

[0009] Preferably, the guiding bottom surface is an arc-shaped bottom surface.

[0010] Or, the guiding bottom surface is an inclined bottom surface.

[0011] Among them, a limiting component is arranged in the liquid inlet pipeline or in the liquid passing cavity. The limiting component partially blocks the pipe orifice of the liquid inlet pipeline.

[0012] Preferably, the limiting component is a limiting boss. The limiting boss is arranged in the liquid passing cavity. The top end of the limiting boss extends into the liquid inlet pipeline, and the bottom end of the limiting boss abuts against the guiding bottom surface of the liquid passing cavity.

[0013] Or, the limiting component is a limiting ring, and the limiting ring protrudes from the inner wall of the liquid inlet pipeline.

[0014] Preferably, a filter element is arranged radially in the connecting pipe.

[0015] A multi-channel connection joint disclosed by the present utility model includes: a joint body, a first joint, and a connecting rib. The joint body, the first joint, and the connecting rib are of an integral structure. The connecting rib is arranged at the connection between the joint body and the first joint. The first joint includes a connecting pipe and a connecting cylinder. The connecting cylinder is sleeved outside the connecting pipe and forms an annular accommodating cavity between the connecting cylinder and the connecting pipe. A first thread is arranged on the inner wall of the connecting cylinder. The multi-channel connection joint of the present utility model is manufactured by an integral injection molding process. During assembly, the fitting joint (female joint) of the indwelling needle is directly screwed into the annular accommodating cavity between the connecting cylinder and the connecting pipe, effectively solving the technical problems in the traditional technical solution that the connection between the infusion joint, the infusion tube, and the male joint is bonded with glue, resulting in poor adhesion, easy disconnection or liquid leakage at the connection. Description of the Drawings

[0016] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 The overall structure diagram of the multi-channel connection joint disclosed in the embodiments of the present utility model;

[0018] Figure 2 The sectional view of the multi-channel connection joint disclosed in the embodiments of the present utility model from the first perspective;

[0019] Figure 3 The sectional view of the multi-channel connection joint disclosed in the embodiments of the present utility model from the second perspective;

[0020] Figure 4 Disclosed in the embodiments of the present utility model Figure 3 The enlarged structure diagram of part A;

[0021] Figure 5 Disclosed in the embodiments of the present utility model Figure 3 The enlarged structure diagram of part B;

[0022] Reference numerals:

[0023] 1. Joint body; 11. Liquid passing cavity; 111. Flow guiding bottom surface; 1111. Inclined surface bottom surface; 112. First liquid outlet; 12. Liquid inlet; 13. Liquid inlet pipeline; 131. First liquid inlet pipeline; 132. Second liquid inlet pipeline; 14. Partition part; 15. Limiting component; 151. Limiting boss; 2. First joint; 21. Connecting pipe; 211. Filter element; 22. Connecting cylinder; 221. Connecting cover; 2211. First hole; 222. Sleeve; 2221. First thread; 223. First opening; 224. Annular accommodating cavity; 3. Connecting rib; Detailed implementation manners

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0025] It should be understood that when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0026] It should also be understood that the terms used in the specification of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. As used in the specification of the present utility model and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms.

[0027] It should be further understood that the term "and / or" used in the specification of the present utility model and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0028] The above is only the specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

[0029] The present utility model discloses a multi-channel connection joint, including a joint body 1 and a first joint 2. The joint body 1 and the first joint 2 are of an integral structure. According to the structure of the multi-channel connection joint, the mold structure of the injection mold is designed, and the multi-channel connection joint with an integral structure is obtained by using the integral injection molding process. The integral injection molding process can achieve continuous and high-speed injection molding, shorten the production cycle of the multi-channel connection joint, improve production efficiency, and ensure the consistent size and structure of each multi-channel connection joint product.

[0030] Specifically, please refer to Figures 1 - 3, the joint body 1 includes a liquid passing cavity 11, a plurality of liquid inlets 12, and a plurality of liquid inlet pipelines 13. The plurality of liquid inlets 12 are connected to the liquid passing cavity 11 through the plurality of liquid inlet pipelines 13. The number of liquid inlets 12 corresponds to the number of liquid inlet pipelines 13. The number of liquid inlets 12 can be two, three or more, and the number of liquid inlet pipelines 13 can also be two, three or more. The number of liquid inlets 12 and the number of liquid inlet pipelines 13 are set according to the infusion requirements of the patient. A plurality of infusion bottles are respectively connected to the plurality of liquid inlet pipelines 13 through a plurality of infusion tubes. A stop clamp can also be provided on the infusion tube to meet the infusion requirement of separately inputting different drugs into the patient's body. In this embodiment, the number of liquid inlets 12 is set to two, and the number of liquid inlet pipelines 13 is set to two. The two liquid inlet pipelines 13 are arranged in parallel to ensure that the flow rates of the liquid medicines in the two liquid inlet pipelines 13 are not much different and ensure the infusion efficiency. The plurality of liquid inlet pipelines 13 are arranged in parallel and separated by a partition portion 14. The plurality of liquid inlet pipelines 13 share one partition portion 14. This design can make the structure of the multi-channel connection joint relatively compact and occupy less space. When designing the mold, the number of cavities of the mold can be appropriately increased, so that the same volume of the mold can produce more multi-channel connection joints, greatly improving the production efficiency. In this embodiment, the two liquid inlet pipelines 13 share one partition portion 14 to make the volume of the joint body 1 smaller and save more raw materials. The joint body 1 has a flat structure, which is convenient for the user to hold.

[0031] Among them, the liquid passing cavity 11 includes a diversion bottom surface 111, and a first liquid outlet 112 is provided on the diversion bottom surface 111. Please refer to Figures 3 - 4 , in this embodiment, the first liquid outlet 112 is arranged at the central position of the diversion bottom surface 111, which can effectively ensure that the flow rates of the liquid medicines at various places in the liquid passing cavity 11 are uniform, and the liquid medicine can flow out smoothly. The first liquid outlet 112 is connected to the first joint 2. The liquid medicine enters the liquid passing cavity 11 from the plurality of liquid inlets 12 through the plurality of liquid inlet pipelines 13, is fully mixed in the liquid passing cavity 11, and then is diverted by the diversion bottom surface 111 and flows into the first joint 2 through the first liquid outlet 112.

[0032] Among them, the first joint 2 includes a connecting pipe 21 and a connecting cylinder 22. Please refer to Figure 2 and Figure 5, the connecting cylinder 22 is sleeved outside the connecting pipe 21 and forms an annular accommodating cavity 224 between the connecting cylinder 22 and the connecting pipe 21. A first thread 2221 is provided on the inner wall of the connecting cylinder 22 for connecting a female connector whose outer wall of the other end is provided with a second thread adapted to the first thread 2221. The connecting pipe 21 communicates with the first liquid outlet 112. The connecting cylinder 22 includes a first opening 223, and the first opening 223 is arranged at one end of the connecting cylinder 22 far from the joint body 1. The end of the connecting pipe 21 far from the first liquid outlet 112 protrudes from the end face of the opening end of the first opening 223 of the connecting cylinder 22. During assembly, the female connector whose outer wall of the other end is provided with a second thread adapted to the first thread 2221 is screwed into the annular accommodating cavity 224 through the first opening 223 by screwing. The first thread 2221 and the second thread are tightly fitted so that the first connector 2 is tightly connected to the female connector. Since the connecting pipe 21 is longer than the connecting cylinder 22, the connecting pipe 21 extends into the connected female connector, which can ensure that the liquid medicine flows smoothly from the connecting pipe 21 into the connected female connector and prevent the liquid medicine from leaking out and entering the annular accommodating cavity 224.

[0033] Specifically, please refer to Figure 1 and Figure 5 , the connecting cylinder 22 includes a sleeve 222 and a connecting cover 221. The first opening 223 is arranged at one end of the sleeve 222, and the connecting cover 221 is covered on the end of the sleeve 222 far from the first opening 223; a first hole 2211 is provided at the central position of the connecting cover 221, and the connecting pipe 21 passes through the first hole 2211 and is fixedly connected to the connecting cover 221. The sleeve 222 is sleeved outside the connecting pipe 21 and forms an annular accommodating cavity 224 between the sleeve 222 and the connecting pipe 21. The first thread 2221 is arranged on the inner wall of the sleeve. The sleeve 222 and the connecting pipe 21 are arranged in parallel to ensure that the female connector whose outer wall of the other end is provided with a second thread adapted to the first thread 2221 can be smoothly screwed into the annular accommodating cavity 224 and tightly connected.

[0034] In this embodiment, the multi-channel connecting joint is manufactured by an integral injection molding process. The outer wall of the end of the fitting joint (female connector) of the indwelling needle is provided with a second thread adapted to the first thread 2221. During assembly, the fitting joint (female connector) of the indwelling needle is directly screwed into the annular accommodating cavity 224 between the connecting cylinder 22 and the connecting pipe 21, and the connection and assembly of the multi-channel connecting joint and the indwelling needle can be completed.

[0035] Wherein, a connecting rib 3 is further provided at the connection between the joint body 1 and the first connector 2. The connecting rib 3, the joint body 1, and the first connector 2 are an integrally injection-molded structure. Please refer to Figure 1, the connecting ribs 3 are arranged on the left and right sides of the joint body 1 and the first joint 2 and are symmetrically arranged. The connecting ribs 3 are respectively connected to the outer side wall of the liquid passage cavity 11, the outer wall of the connecting pipe 21, and the upper side surface of the connecting cover 221. Specifically, one side surface of the connecting rib 3 is connected to the outer side wall of the liquid passage cavity 11 and the outer wall of the connecting pipe 21, and the bottom surface of the connecting rib 3 is connected to the upper side surface of the connecting cover 221. Since the shapes of the joint body 1 and the connecting pipe 21 are different and the cross-sectional area of the joint body 1 is larger than that of the connecting pipe 21, during use, when subjected to pressure, torsion, and bending, the connection between the joint body 1 and the connecting pipe 21 is prone to deformation or even breakage. The connecting rib 3 can ensure the stability of the connection between the joint body 1 and the connecting pipe 21, and ensure the reliability of the multi-channel connection joint during use, and extend the service life of the multi-channel connection joint.

[0036] Among them, the guide bottom surface 111 is an arc-shaped bottom surface, and the arc-shaped bottom surface makes the flow rate distribution of the liquid medicine in the liquid passage cavity 11 relatively uniform and stable.

[0037] Among them, the guide bottom surface 111 can also be an inclined bottom surface 1111, and the inclined bottom surface 1111 can accelerate the flow rate of the liquid medicine in the liquid passage cavity 11. In this embodiment, the guide bottom surface 111 is the inclined bottom surface 1111, please refer to Figures 3 - 4 , the inclined bottom surface 1111 can ensure the flow rate of the liquid medicine in the liquid passage cavity 11.

[0038] Among them, a limiting component 15 is provided in the liquid inlet pipeline 13 or in the liquid passage cavity 11. The limiting component 15 is arranged close to the inner wall of the liquid inlet pipeline 13 or the inner wall of the liquid passage cavity 11. The limiting component 15 partially blocks the pipe orifice of the liquid inlet pipeline 13. During assembly, the infusion tube is inserted into the liquid inlet pipeline 13 to connect the infusion bottle and the multi-channel connection joint. The limiting component 15 can limit the infusion tube inserted into the liquid inlet pipeline 13 to prevent the infusion tube from being inserted to the bottom of the liquid passage cavity 11 and blocking the infusion tube. In this embodiment, the length of the liquid inlet pipeline is 12 mm, and the distance from the top end of the limiting component to the liquid inlet is L. Please refer to Figure 2 , L should satisfy 6 mm ≤ L ≤ 9 mm. When L < 6 mm, the insertion depth of the infusion tube into the liquid inlet pipeline 13 is too shallow. When the liquid medicine flows through the infusion tube, the infusion tube is easily disengaged from the liquid inlet pipeline 13 under the action of hydraulic pressure. When L > 9 mm, the insertion depth of the infusion tube into the liquid inlet 12 is too deep, the intubation is more difficult, and the infusion tube is easily bent to cause blockage. In addition, the thickness of the limiting component 15 should be slightly smaller than the thickness of the infusion tube, so that the infusion tube can be smoothly blocked after being inserted into the liquid inlet pipeline 13, and the thickness of the limiting component 15 should not be too thick. On the premise of not affecting the liquid flow, the thickness of the limiting component 15 can meet the requirement of blocking the end face of the infusion tube.

[0039] Specifically, the limiting component 15 is a limiting boss 151. Please refer to Figure 4, the limiting boss 151 is arranged in the liquid passing cavity 11. The top end of the limiting boss 151 extends into the liquid inlet pipeline 13, and the bottom end of the limiting boss 151 abuts against the guiding bottom surface 111 of the liquid passing cavity 11. In this embodiment, the limiting component 15 is the limiting boss 151. The distance between the top end of the limiting boss 151 and the liquid inlet 12 is 7 mm. During assembly, the infusion tube is inserted from the liquid inlet 12 until the infusion tube abuts against the top end of the limiting boss 151, which means the tube insertion is in place.

[0040] Specifically, the limiting component 15 can also be a limiting ring. The structure of the limiting ring is relatively simple and cost-saving. The limiting ring protrudes from the inner wall of the liquid inlet pipeline 13. Similarly, the distance between the limiting ring and the liquid inlet 12 is L, where 6 mm ≤ L ≤ 9 mm. During tube insertion, when the infusion tube abuts against the limiting ring, the tube insertion is in place.

[0041] Wherein, a filter element 211 is arranged radially in the connecting pipe 21. The filter element 211 is arranged below the first liquid outlet 112. Please refer to Figures 2 - 3 , the filter element 211 can be a filter net, a filter membrane, etc., which is used to filter insoluble particles in the liquid medicine and eliminate air bubbles in the liquid medicine to further ensure the smooth flow of the liquid medicine. The filter element in this embodiment is a filter membrane.

[0042] In this embodiment, the joint body 1, the first joint 2, and the connecting rib 3 are of an injection-molded integral structure. The injection mold is designed according to the structure of the multi-channel connection joint, and the multi-channel connection joint is manufactured by an integral injection molding process. The number of liquid inlets 12 is two, and the number of liquid inlet pipelines 13 is two. The liquid inlet pipelines 13 include a first liquid inlet pipeline 131 and a second liquid inlet pipeline 132. Please refer to Figure 4, the first liquid inlet pipeline 131 and the second liquid inlet pipeline 132 are arranged in parallel and share a partition portion 14. The first liquid inlet pipeline 131, the liquid passing cavity 11, and the second liquid inlet pipeline 132 form a "U"-shaped connected pipeline. The joint body 1 has a flat structure, which is convenient for users to hold and assemble. The guiding bottom surface 111 of the liquid passing cavity 11 is an inclined bottom surface 1111 to ensure the flow rate of the liquid medicine in the liquid passing cavity 11. The connecting ribs 3 are arranged on the left and right sides of the joint body 1 and the first joint 2 and are symmetrically arranged. The connecting ribs 3 are respectively connected to the outer wall of the liquid passing cavity 11, the outer wall of the connecting pipe 21, and the upper side surface of the connecting cover 221 to further ensure the firm connection between the joint body 1 and the first joint 2. Two limiting bosses 151 are respectively arranged in the liquid passing cavity 11. The tops of the two limiting bosses 151 respectively extend into the first liquid inlet pipeline 131 and the second liquid inlet pipeline 132, and the bottoms of the two limiting bosses 151 are respectively abutted against the inclined bottom surface 1111 of the liquid passing cavity 11. In this embodiment, the lengths of the first liquid inlet pipeline 131 and the second liquid inlet pipeline 132 are both 12 mm, and the distance L from the top of the limiting boss 151 to the liquid inlet 12 is 7 mm. During assembly, when the infusion tube is inserted from the liquid inlet 12 until it abuts against the top of the limiting boss 151, the tube insertion is in place. A first liquid outlet 112 is provided at the central position of the guiding bottom surface 111, and the first liquid outlet 112 is communicated with the connecting pipe 21. The connecting cylinder 22 is sleeved outside the connecting pipe 21, and an annular accommodation cavity 224 is formed between the connecting pipe 21 and the connecting cylinder 22. A first thread 2221 is provided on the inner wall of the connecting cylinder 22. During assembly, a female joint with a second thread matching the first thread 2221 on the outer wall of the other end is screwed into the annular accommodation cavity 224 between the connecting cylinder 22 and the connecting pipe 21 to complete the assembly.

[0043] A multi-channel connection joint disclosed by the present utility model includes: a joint body, a first joint, and a connecting rib. The joint body, the first joint, and the connecting rib are integrally injection-molded. The connecting rib is arranged at the connection of the joint body and the first joint. The first joint includes a connecting pipe and a connecting cylinder. The connecting cylinder is sleeved outside the connecting pipe and forms an annular accommodation cavity with the connecting pipe. A first thread is provided on the inner wall of the connecting cylinder. During assembly, the fitting joint (female joint) of the indwelling needle is directly screwed into the annular accommodation cavity between the connecting cylinder and the connecting pipe to complete the assembly, simplifying the operation process in the traditional technical solution of first using glue to bond the connections of the infusion joint, the infusion tube, and the male joint, and then screwing the fitting joint (female joint) of the indwelling needle into the male joint, and solving the technical problems in the prior art that the method of using glue to bond the connections of the infusion joint, the infusion tube, and the male joint has poor adhesion, and the connection is prone to disconnection or liquid leakage, ensuring the reliability of the infusion device during use.

[0044] As described above, it is only the specific implementation manner of the present application. However, the protection scope of the present application is not limited thereto. Any various equivalent modifications or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A multi-channel connection joint, characterized in that, Comprising: A joint body and a first joint, the joint body and the first joint being of an integral structure; The joint body includes: a liquid passing cavity, a plurality of liquid inlets, and a plurality of liquid inlet pipelines. The plurality of liquid inlets are connected to the liquid passing cavity through the plurality of liquid inlet pipelines. The liquid passing cavity includes a guiding bottom surface, and a first liquid outlet is provided on the guiding bottom surface. The first liquid outlet is connected to the first joint; The first joint includes a connecting pipe and a connecting cylinder. The connecting pipe is connected to the first liquid outlet. The connecting cylinder is sleeved outside the connecting pipe and forms an annular accommodating cavity between the connecting pipe and the connecting cylinder. A first thread is provided on the inner wall of the connecting cylinder. The connecting cylinder includes a first opening, and the first opening is arranged at one end of the connecting cylinder away from the joint body. The end of the connecting pipe away from the first liquid outlet protrudes from the end surface of the opening end of the first opening.

2. The multi-channel connection joint according to claim 1, wherein, The connecting cylinder includes: a sleeve and a connecting cover. The first opening is arranged at one end of the sleeve. The connecting cover covers the end of the sleeve away from the first opening. A first hole is provided at the central position of the connecting cover. The connecting pipe passes through the first hole and is connected to the connecting cover. The sleeve is arranged outside the connecting pipe and forms an annular accommodating cavity between the sleeve and the connecting pipe. The sleeve is arranged parallel to the connecting pipe. The first thread is provided on the inner wall of the sleeve.

3. The multi-channel connection joint according to claim 2, wherein, A connecting rib is further provided at the connection between the joint body and the first joint. The connecting rib connects the outer wall of the liquid passing cavity, the outer wall of the connecting pipe, and the upper side surface of the connecting cover respectively.

4. The multi-channel connection joint according to claim 1, wherein, The plurality of liquid inlet pipelines are arranged in parallel and separated by a partition portion.

5. The multi-channel connection joint according to claim 1, characterized in that, The guiding bottom surface is an arc-shaped bottom surface.

6. The multi-channel connection joint according to claim 5, wherein, The guiding bottom surface is an inclined bottom surface.

7. The multi-channel connection joint according to claim 1, wherein, A limiting component is provided in the liquid inlet pipeline or in the liquid passing cavity. The limiting component partially blocks the pipe orifice of the liquid inlet pipeline.

8. The multi-channel connection joint according to claim 7, wherein The limiting component is a limiting boss. The limiting boss is arranged in the liquid passing cavity. The top end of the limiting boss extends into the liquid inlet pipeline. The bottom end of the limiting boss abuts against the guiding bottom surface of the liquid passing cavity.

9. The multi-channel connection joint according to claim 7, characterized in that, The limiting component is a limiting ring, and the limiting ring protrudes from the inner wall of the liquid inlet pipeline.

10. The multi-channel connection joint according to claim 1, wherein A filter element is arranged radially in the connecting pipe.

Images