Connecting pipeline and liquid conveying structure

Abstract

The utility model relates to a connecting pipeline and a liquid conveying structure, and belongs to the technical field of fluid pipelines. The connecting pipeline comprises two to-be-connected pipelines and a transition pipeline, and the two to-be-connected pipelines are different in pipe diameter and are respectively a large-diameter pipeline with a large pipe diameter and a small-diameter pipeline with a small pipe diameter; the two ends of the transition pipeline are welded to the large-diameter pipeline and the small-diameter pipeline respectively, the outer diameter of the transition pipeline is matched with the inner diameter of the large-diameter pipeline, the inner diameter of the transition pipeline is matched with the outer diameter of the small-diameter pipeline, the transition pipeline extends into the large-diameter pipeline, and the small-diameter pipeline extends into the transition pipeline. According to the connecting pipeline provided by the utility model, a large-diameter pipeline can be converted into a small-diameter pipeline only through one-time switching, and a pagoda barb joint does not need to be manually inserted, so that the operation time is saved, and the operation intensity is small; meanwhile, by setting the inner and outer diameters of the large-diameter pipeline and the small-diameter pipeline and setting the insertion depth, the hot welding operation can ensure the connection strength and reduce the risk of air leakage and liquid leakage.

Description

TECHNICAL FIELD

[0001] The utility model relates to fluid pipeline technical field, concretely is a connecting pipeline and transfusion structure. BACKGROUND

[0002] In the liquid delivery structure, due to the cooperation container or cooperation equipment of the two ends of pipeline is different, need to adopt the different pipe diameter to connect, therefore, in the structure, there is usually the need of pipeline reducing. At present, for the connection and reducing of soft pipeline, generally adopt the mode of connecting with pagoda barb joint, this mode needs to manually insert pagoda barb joint, and the working strength is big, and the operator is easy to operate fatigue, in addition, under the condition that the size pipe diameter difference is big, cannot directly switch, usually need to switch 2-3 times, in addition, this reducing mode still has the risk such as pipe burst caused by excessive air pressure / water pressure, gas / liquid leakage caused by pipeline stress being pulled off. UTILITY MODEL CONTENTS

[0003] The utility model discloses a kind of connecting pipeline and transfusion structure, can solve the technical problem brought by the manual insertion pagoda barb joint for pipeline reducing mentioned in above background.

[0004] To achieve the above object, the utility model provides the following technical scheme: a connecting pipeline, comprising: two pipelines to be connected and transition pipeline, the pipe diameter of two pipelines is different, and is large-diameter pipeline and small-diameter pipeline with larger pipe diameter and smaller pipe diameter respectively;The two ends of the transition pipeline are welded with large-diameter pipeline and small-diameter pipeline respectively, the outer diameter of the transition pipeline matches the inner diameter of large-diameter pipeline, the inner diameter of the transition pipeline matches the outer diameter of small-diameter pipeline, and the transition pipeline extends into large-diameter pipeline, and the small-diameter pipeline extends into the transition pipeline.

[0005] In a preferred embodiment, the large-diameter pipeline, the small-diameter pipeline and the transition pipeline are all made of thermoplastic material pipeline.

[0006] In a preferred embodiment, the inner diameter of the large-diameter pipeline is set to be twice or more than the outer diameter of the small-diameter pipeline, which can make the pipe wall thickness of the intermediate transition pipeline large enough, so that the pipe wall is not too thin after welding, ensuring the tensile strength and reducing the risk of gas leakage and liquid leakage.

[0007] In a preferred embodiment, the length of the transition pipeline is set to 5-200mm. The length of the transition pipeline should not be too long, otherwise it needs to be welded twice, increasing the working time and affecting the appearance of the pipeline. The length should not be too short, otherwise it will cause the depth of the small-diameter pipeline inserted into the transition pipeline to be too short, affecting the connection strength.

[0008] In a preferred embodiment, the depth of the transition pipe extending into the large-diameter pipe is 5-100 mm, and the depth of the small-diameter pipe extending into the transition pipe is 5-100 mm. This insertion depth can ensure sufficient connection strength between the transition pipe and the large-diameter pipe and the small-diameter pipe.

[0009] In a preferred embodiment, the depth of the transition pipe extending into the large diameter pipe is the same as the depth of the small diameter pipe extending into the transition pipe. Setting the same insertion depth for both can maximize the use of the hot melt mold space and avoid local false welding or over-welding.

[0010] Another aspect of the present invention provides an infusion structure, comprising the connecting pipeline described in any of the above solutions, wherein the large-diameter pipeline and the small-diameter pipeline are respectively connected to containers or devices at both ends of the infusion structure.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. The connecting pipeline provided by the utility model is a transition pipeline reasonably set between the large-diameter pipeline and the small-diameter pipeline, which can realize the conversion of the large-diameter pipeline to the small-diameter pipeline with only one transfer, without the need for manual insertion of the pagoda barb joint, saving operation time and reducing operation intensity;

[0013] 2. By setting the proportional relationship between the inner and outer diameters of the large-diameter and small-diameter pipelines, as well as the reasonable setting of the depth of the transition pipeline extending into the large-diameter pipeline and the depth of the small-diameter pipeline extending into the transition pipeline, the connection strength between them can be ensured; by thermally welding the transition pipeline and the large-diameter and small-diameter pipelines together, the reliability and tensile strength can be further guaranteed, reducing the risk of air and liquid leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a three-dimensional diagram of the connection state of the connecting pipe before melting in the embodiment of the utility model;

[0015] Figure 2 This is a front view of the connection state of the connecting pipe before melting in the embodiment of the utility model;

[0016] Figure 3 This is a schematic diagram of the state of the connecting pipe after melting in the embodiment of the utility model;

[0017] Figure 4 This is a schematic diagram of the infusion structure in an embodiment of the present utility model.

[0018] The meaning of each number in the figure is:

[0019] 1. Large diameter pipeline; 2. Small diameter pipeline; 3. Transition pipeline; 4. Filter; 5. Liquid storage bottle. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0021] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0022] Referring to Figure 1 , Figure 2 The present embodiment discloses a connecting pipeline, comprising two pipelines to be connected and a transition pipeline 3 for connecting the two pipelines.

[0023] In the present embodiment, the two pipelines to be connected have different diameters, namely a large-diameter pipeline 1 with a larger diameter and a small-diameter pipeline 2 with a smaller diameter, and the two ends of the transition pipeline 3 are welded to the large-diameter pipeline 1 and the small-diameter pipeline 2, respectively, so as to connect the large-diameter pipeline 1 and the small-diameter pipeline 2 and realize the transition from large diameter to small diameter.

[0024] The large-diameter pipeline 1, the small-diameter pipeline 2 and the transition pipeline 3 are preferably pipelines made of thermoplastic materials capable of being heat-welded, and for example, a soft PVC pipe with excellent corrosion resistance and a relatively high cost performance is preferably used, and other materials such as TPU, PP, PPR, silica gel, rubber, PE and ABS can also be used.

[0025] In the present embodiment, the large-diameter pipeline 1, the small-diameter pipeline 2 and the transition pipeline 3 are coaxially arranged, the outer diameter of the transition pipeline 3 matches the inner diameter of the large-diameter pipeline 1, and the inner diameter of the transition pipeline 3 matches the outer diameter of the small-diameter pipeline 2. During installation, one end of the transition pipeline 3 is inserted into the large-diameter pipeline 1, and the small-diameter pipeline 2 is inserted into the other end of the transition pipeline 3. It should be noted that in the present embodiment, the inner diameter of the large-diameter pipeline 1 is set to be twice or more than the outer diameter of the small-diameter pipeline 2. This setting makes the wall thickness of the transition pipeline 3 large enough, so that after heat-welding, the wall thickness will not be too thin, thereby ensuring the tensile strength and reducing the risk of gas or liquid leakage.

[0026] Furthermore, the length of the transition pipe 3 used for connection must match the length of the hot melt die used for welding to improve welding efficiency. The length of the transition pipe 3 is usually set to about 5-200mm. The length of the transition pipe 3 should not be set too long, otherwise it will require two welding operations, which not only increases labor time but also affects the appearance of the pipeline. The length should not be set too short, otherwise the depth of the transition pipe 3 inserted into the large-diameter pipeline 1 will be too short, and the depth of the small-diameter pipeline 2 inserted into the transition pipe 3 will be too short, thereby affecting the strength of the connection.

[0027] Specifically, the insertion depth of the transition pipe 3 into the large-diameter pipe 1 is approximately 5-100 mm. Similarly, the insertion depth of the small-diameter pipe 2 into the transition pipe 3 is also approximately 5-100 mm. This insertion depth ensures sufficient connection strength with the large-diameter pipe 1 and the small-diameter pipe 2, given the limited length of the transition pipe 3. Furthermore, using the same insertion depth for both maximizes the use of the hot melt mold space and avoids problems such as localized weak welds or over-welding.

[0028] The lengths of the large-diameter pipeline 1 and the small-diameter pipeline 2 are set adaptively according to the usage scenario, and this embodiment does not make any specific limitations thereto.

[0029] In actual application, the transition pipe 3 is manually inserted into the large-diameter pipe 1, and the small-diameter pipe 2 is inserted into the transition pipe 3. The insertion depth is about 5-100mm. The transition pipe 3 is heat-welded with the inner and outer pipe walls of the large-diameter pipe 1 and the small-diameter pipe 2 by using heat welding equipment. The length of the welding area is about 5-200mm. Under the heating of the high-temperature mold, the materials of the large-diameter pipe 1, the small-diameter pipe 2 and the transition pipe 3 are welded to each other and formed into one piece. Figure 3 After fusion is completed and cooled, the large-diameter pipe 1 and the small-diameter pipe 2 are sealed.

[0030] Based on the connecting pipeline disclosed in the above embodiment, another embodiment provides an infusion structure including the connecting pipeline. In the infusion structure, the large-diameter pipeline 1 and the small-diameter pipeline 2 are respectively connected to the containers or devices at both ends of the infusion structure. In this embodiment, the interface pipe diameters adapted to the containers or devices at both ends are different, and thus, through the connection of the corresponding large-diameter pipeline 1 and the small-diameter pipeline 2, normal communication between the containers or devices at both ends can be achieved.

[0031] For example, Figure 4 As shown, the infusion structure includes a filter 4 and a liquid storage bottle 5. The filter 4 is used to connect to the sample container. The connecting pipeline is connected between the filter 4 and the liquid storage bottle 5. Among them, the large-diameter pipeline 1 is connected to the output end of the filter 4, and the small-diameter pipeline 2 is connected to the input end of the liquid storage bottle 5. The input end of the filter 4 can also be connected to the sample container through the connecting pipeline.

[0032] The connecting pipeline structure provided by the embodiment can realize the transition from the large-diameter pipeline 1 to the small-diameter pipeline 2 without manual insertion of the inverted cone joint, saves operation time, and has small operation strength. Meanwhile, the connection strength between the pipelines can be ensured by setting the ratio relationship between the inner and outer diameters of the large-diameter pipeline 1 and the small-diameter pipeline 2 and by reasonably setting the depth of the transition pipeline extending into the large-diameter pipeline and the depth of the small-diameter pipeline extending into the transition pipeline. The reliability and tensile strength can be further ensured by heat welding the transition pipeline 3, the large-diameter pipeline 1 and the small-diameter pipeline 2 together, and the risk of gas leakage and liquid leakage is reduced.

[0033] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only preferred examples of the utility model and are not intended to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model can have various changes and improvements, and these changes and improvements fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A connection line, characterized in that The utility model relates to a connecting pipe for connecting two pipes with different diameters, and belongs to the technical field of pipe connection. The utility model discloses a connecting pipe for connecting two pipes with different diameters, and belongs to the technical field of pipe connection. The utility model discloses a connecting pipe for connecting two pipes with different diameters, and belongs to the technical field of pipe connection.

2. The connecting line according to claim 1, characterized in that The utility model discloses a connecting pipe for connecting two pipes with different diameters, and belongs to the technical field of pipe connection.

3. The connecting line according to claim 1, characterized in that The utility model discloses a connecting pipe for connecting two pipes with different diameters, and belongs to the technical field of pipe connection.

4. The connecting line according to claim 1, characterized in that The utility model discloses a connecting pipe for connecting two pipes with different diameters, and belongs to the technical field of pipe connection.

5. The connecting line according to claim 1, characterized in that The utility model discloses a connecting pipe for connecting two pipes with different diameters, and belongs to the technical field of pipe connection.

6. The connecting line according to claim 1, characterized in that The utility model discloses a connecting pipe for connecting two pipes with different diameters, and belongs to the technical field of pipe connection.

7. An infusion structure, characterized by The utility model discloses a connecting pipe for connecting two pipes with different diameters, and belongs to the technical field of pipe connection. The utility model discloses a connecting pipe for connecting two pipes with different diameters, and belongs to the technical field of pipe connection. The utility model discloses a connecting pipe for connecting two pipes with different diameters, and belongs to the technical field of pipe connection. The utility model discloses a connecting pipe for connecting two pipes with different diameters, and belongs to the technical field of pipe connection. The utility model discloses a connecting pipe for connecting two pipes with different diameters, and belongs to the technical field of pipe connection. The utility model discloses a connecting pipe for connecting two pipes with different diameters, and belongs to the technical field of pipe connection. The utility model discloses a connecting pipe for connecting two pipes with different diameters, and belongs to the technical field of pipe connection. The utility model discloses a connecting pipe for connecting two pipes with different diameters, and belongs to the technical field of pipe connection. The utility model discloses a connecting pipe for connecting two pipes with different diameters, and belongs to the technical field of pipe connection. The utility model discloses a connecting pipe for connecting two pipes with different diameters, and belongs to the technical field of pipe connection. The utility model discloses a connecting pipe for connecting two pipes with different diameters, and belongs to the technical field of pipe connection. The utility model discloses a connecting pipe for connecting two pipes with different diameters, and belongs to the technical field of pipe connection. The utility model discloses a connecting pipe for connecting two pipes with different diameters, and belongs to the technical field of pipe connection. The utility model discloses a connecting pipe for connecting two pipes with different diameters, and belongs to the technical field of pipe connection. The utility model discloses a connecting pipe for connecting two pipes with different diameters, and belongs to the technical field of pipe connection. The utility model discloses a connecting pipe for connecting two pipes with different diameters, and belongs to the technical field of pipe connection. The utility model discloses a connecting pipe for connecting two pipes with different diameters, and belongs to the technical field of pipe connection. The utility model discloses a connecting pipe for connecting two pipes with different diameters, and belongs to the technical field of pipe connection. The utility model discloses a connecting pipe for connecting two pipes with different diameters, and belongs to the technical field of pipe connection. The utility model discloses a connecting pipe for connecting two pipes with different diameters, and belongs to the technical field of pipe connection. The utility model discloses a connecting pipe for connecting two pipes with different diameters, and belongs to the technical field of pipe connection. The utility model discloses a connecting pipe for connecting two pipes with different diameters, and belongs to the

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