Pipeline connecting structure

Abstract

The invention discloses a pipeline connecting structure which comprises two connecting assemblies communicating with each other. Each connecting assembly comprises a communicating piece, and each communicating piece is hollow to form a flowing cavity and a connecting cavity. The flowing cavities of all the connecting assemblies are communicated with one another; the locking assembly comprises a locking cover and a clamping part, and the outer side wall of the communicating piece is movably sleeved with the locking cover; the clamping part is arranged in the locking cover, a locking cavity penetrates through the clamping part, and an inclined plane is formed on the outer side of the clamping part; the pressing sleeve is arranged on the outer side of the clamping part in a sleeving mode, and an annular inclined face is formed on the inner side of the pressing sleeve. After two independent pipelines are inserted into the connecting cavities of the communicating pieces correspondingly, the locking cover is pushed to ascend and move in the axial direction of the locking cover, so that the clamping part is driven to ascend and move till the annular inclined face of the pressing sleeve is attached to the inclined face of the clamping part, and then the clamping part is extruded to be capable of being fixedly locked to the outer side walls of the pipelines; it is ensured that all the pipelines can be fixedly inserted into the connecting cavities of all the communicating pieces, and the situation that the pipelines are prone to falling off is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline connection, and in particular to a pipeline connection structure. Background Art

[0002] In order to achieve mutual connection between two independent pipelines, a pipeline connecting structure is provided between the two pipelines, and the two pipelines are respectively extended to the two connecting ports of the pipeline connecting structure, thereby forming a fluid channel, so that the fluid (such as gas, liquid, etc.) can flow freely between the two pipelines.

[0003] In some related technologies, such as the patent with publication number CN118517590A, a quick connection structure of a pipeline is disclosed, including a first pipe head, a second pipe head, a first clamp, a second clamp and a buckle, the first pipe head and the second pipe head are respectively connected to the pipe ends of two different pipes, the first clamp and the second clamp are respectively clamped on the first pipe head and the second pipe head, and a plurality of buckles are provided, which are arranged between the first clamp and the second clamp. This scheme does not disclose how to fix the first and second pipe heads to the two pipes respectively, so it is easy to cause the pipes to fall off, and it is impossible to ensure that the pipes can be stably connected to the pipe heads. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art solutions, an embodiment of the present invention provides a pipeline connection structure.

[0005] The technical solution adopted by the present invention to solve the technical problem is:

[0006] A pipeline connection structure, the pipeline connection structure comprises two interconnected connection components: each of the connection components comprises:

[0007] A connecting piece, wherein the connecting piece is hollow and has a flow cavity and a connecting cavity; the flow cavities of the connecting components are connected to each other; the connecting cavity is connected to the flow cavity through a connecting port;

[0008] A locking assembly, the locking assembly comprising a locking cover and a clamping portion, the locking cover being movably sleeved on the outer wall of the connecting piece along the axial direction; the clamping portion being arranged in the locking cover, the clamping portion having a locking cavity passing through it, and being used for passing a pipeline through the locking cavity and then connecting it to the connecting port, and an inclined surface being formed on the outer side of the clamping portion;

[0009] A pressing sleeve is arranged on the outer side of the clamping portion, and an annular inclined surface is formed on the inner side of the pressing sleeve for fitting against the inclined surface.

[0010] As a preferred technical solution of the present invention, the clamping portion includes a plurality of elastically arranged buckles, each of which is arranged at intervals in the locking cover, and each of which is arranged in a circular array to form the locking cavity surrounding the outer side wall of the pipeline;

[0011] The inclined surface is formed on one side of each of the buckles.

[0012] As a preferred technical solution of the present invention, a side of each of the buckles away from the inclined surface is formed with an arc surface for fitting against the outer side wall of the pipeline.

[0013] As a preferred technical solution of the present invention, the outer side wall of the connecting piece is provided with a first thread; the inner side wall of the locking cover is provided with a second thread matching the first thread.

[0014] As a preferred technical solution of the present invention, the outer side wall of the connecting piece is provided with a limiting portion for limiting the movement range of the locking cover.

[0015] As a preferred technical solution of the present invention, a sealing sleeve is provided between the outer side wall of the pipeline and the cavity wall of the connecting cavity.

[0016] As a preferred technical solution of the present invention, the connection cavity is recessed with a positioning cavity, and the positioning cavity is communicated with the communication port; one end of the pipeline extends into the positioning cavity.

[0017] As a preferred technical solution of the present invention, the cavity wall of the connecting cavity is formed with a guiding inclined surface, and the outer side wall of the pressing sleeve is formed with an inclined surface for fitting with the guiding inclined surface.

[0018] As a preferred technical solution of the present invention, the pressing sleeve is a soft rubber sleeve.

[0019] As a preferred technical solution of the present invention, the outer side wall of the connecting piece is provided with a plurality of driving parts.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] After two independent pipelines are respectively inserted into the connecting cavities of each connecting piece, the locking cover is pushed to move upward along its axial direction to drive the clamping part to move upward until the annular inclined surface on the inner side of the pressing sleeve is in contact with the inclined surface on the outer side of the clamping part. At this time, when the clamping part is squeezed by the pressing sleeve, it can generate a radial contraction force to squeeze the clamping part to the outer side wall of the pipeline so as to ensure that each pipeline can be fixedly inserted in the connecting cavity of each connecting piece to prevent the pipeline from easily falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0023] Figure 1 It is an overall structural diagram of an embodiment of the present invention.

[0024] Figure 2 It is a structural cross-sectional view of an embodiment of the present invention.

[0025] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle.

[0026] Figure 4 It is a structural explosion diagram of an embodiment of the present invention.

[0027] Figure 5 2 is a structural diagram of a clamping portion according to an embodiment of the present invention.

[0028] Numbers in the figure

[0029] 1a. Connect components;

[0030] 11. Connecting piece; 111. Flow cavity; 112. Connecting cavity; 1121. Positioning cavity; 113. Connecting port; 114. Guide slope; 115. Limiting part; 116. Driving part;

[0031] 12. locking assembly; 121. locking cover; 122. clamping portion; 1221. buckle; 1222. arc surface; 123. inclined surface; 124. locking cavity;

[0032] 13. Press sleeve; 131. Annular inclined surface;

[0033] 14. Sealing sleeve;

[0034] 15. Pipelines. DETAILED DESCRIPTION

[0035] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0036] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0037] It should be noted that when an element is referred to as being “fixed to” or “disposed on” another element, it may be directly on the other element or indirectly on the other element.

[0038] When an element is referred to as being “connected to” another element, it can be directly connected to the other element or indirectly connected to the other element.

[0039] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0041] In the description of the present application, “plurality” means two or more than two, unless otherwise clearly and specifically defined.

[0042] In order to solve the technical problem in the prior art that the pipe and the pipe head of the pipe connection structure are easily separated and it is impossible to ensure that the pipe can be stably connected to the pipe head, an embodiment of the present invention provides a pipe connection structure.

[0043] The specific structure of a pipeline connection structure provided by an embodiment of the present invention is described in detail below. Figure 1-5 As shown in , the specific structure of the pipeline connection structure includes:

[0044] according to Figure 1 and Figure 2 As shown, two interconnected connection components 1a: by detachably connecting two independent pipelines 15 to the two connection components 1a, the two independent pipelines 15 can be interconnected, and the fluid (such as gas, liquid, etc.) can flow freely between the two pipelines 15. Specifically, each connection component 1a includes a connecting piece 11, a locking component 12, and a pressing sleeve 13.

[0045] according to Figure 2-Figure 4 As shown, the connecting piece 11 is hollow and has a flow cavity 111 and a connecting cavity 112 ; the flow cavities 111 of each connecting assembly 1 a are connected to each other; and the connecting cavity 112 is connected to the flow cavity 111 through a connecting port 113 .

[0046] Specifically, if it is necessary to connect two independently arranged pipelines 15 to each other, first insert one end of the first pipeline 15 into the connecting cavity 112 of the first connecting component 1a, and at the same time insert one end of the second pipeline 1b into the connecting cavity 112 of the second connecting component 1b. Since the connecting components are connected to each other, the flow cavities 111 of each connecting component are connected to each other. When the fluid in the first pipeline 15 flows, the flow can flow from the first pipeline 15 through the flow cavity 111 of the first connecting component 1a to the flow cavity 111 of the second connecting component 1b, and finally flow into the second pipeline 15. This arrangement can ensure that the fluid can flow continuously between the two pipelines 15.

[0047] according to Figure 2 and Figure 3 As shown, the locking assembly 12 includes a locking cover 121 and a clamping portion 122. The locking cover 121 can be axially movably sleeved on the outside of the connecting piece 11; the clamping portion 122 is arranged in the locking cover 121, and the clamping portion 122 has a locking cavity 124 passing through it, which is used to pass the pipeline 15 through the locking cavity 124 and then connect it with the connecting port 113. An inclined surface 123 is formed on the outside of the clamping portion 122.

[0048] Specifically, in order to ensure that the first pipeline 15 can be stably inserted into the connecting cavity 112 of the first connecting component 1a, and the second pipeline 15 can be stably inserted into the connecting cavity 112 of the second connecting component 1a, so as to prevent each pipeline 15 from being separated from each connecting cavity 112, when one end of the first pipeline 15 and the second pipeline 15 are respectively inserted into the connecting cavity 112 of the first connecting component 1a and the second connecting component 1b, at this time, each clamping portion 122 is respectively sleeved on the outside of the pipeline 15, that is, the pipeline 15 needs to pass through the locking cavity 124 in the clamping portion 122 and extend to the deepest part of the connecting cavity 112 before it can be connected to the connecting port 113. By pushing the locking cover 121 to move along its axial direction, since the clamping portion 122 is set at The inner bottom surface of the locking cover 121 can drive the clamping part 122 to move along when the locking cover 121 moves. When the clamping part 122 moves to be able to abut against the pressing sleeve 13, that is, when the outer side of the clamping part 122 abuts against the inner side of the pressing sleeve 13, the pressing seat releases a certain pushing force on the clamping part 122, so that the clamping part 122 can clamp the outer side wall of the pipeline 15 more tightly, so that one end of each pipeline 15 is fixedly inserted in the connecting cavity 112 of each connecting component, effectively preventing the pipeline 15 from being separated from the connecting cavity 112 of the connecting component due to some vibration or pressure change during the flow of fluid. At this time, free flow of fluid can be achieved between the first pipeline 15 and the second pipeline 15.

[0049] according to Figure 3 and Figure 4As shown, the pressing sleeve 13 is sleeved on the outer side of the clamping portion 122 , and an annular inclined surface 131 for fitting against the inclined surface 123 is formed on the inner side of the pressing sleeve 13 .

[0050] Specifically, in order to ensure that each clamping portion 122 can be more tightly clamped on the outer wall of the pipeline 15 to prevent the pipeline 15 from easily falling off, when the locking cover 121 moves upward along its axial direction, it pushes the clamping portion 122 to follow the upward movement until the clamping portion 122 moves to the point where its outer side can abut against the inner side of the pressing sleeve 13. Since the pressing sleeve 13 is sleeved between the outer side of the clamping portion 122 and the cavity wall of the connecting cavity 112, the pressing sleeve 13 can release the pushing pressure on the clamping portion 122. More specifically, at this time When the annular inclined surface on the inner side of the pressing sleeve 13 fits with the inclined surface 123 on the outer side of the clamping part 122, a radial pushing force is applied to the clamping part 122, that is, the clamping part 122 can generate a radial contraction force when being squeezed by the pressing sleeve 13. When the locking cover 121 rises to a specified height, the pressing sleeve 13 can squeeze the clamping part 122 to the outer side wall of the pipeline 15 so as to be fixedly locked thereto, thereby ensuring that each pipeline 15 can be fixedly inserted into the connecting cavity 112 of each connecting component to prevent the two from being separated.

[0051] In the above embodiment, if it is necessary to separate the pipeline 15 from the connecting assembly, it is only necessary to move the locking cover 121 downward along its axis to push the clamping portion 122 to follow the downward movement until the annular inclined surface on the inner side of the pressing sleeve 13 is separated from the inclined surface 123 on the outer side of the clamping portion 122. The clamping portion 122 cannot be squeezed by the pressing sleeve 13, and the clamping portion 122 cannot fix and lock the pipeline 15. At this time, the pipeline 15 can be pulled out from the connecting cavity 112. This arrangement realizes the rapid clamping and release of the pipeline 15, and the overall operation is simple and reliable.

[0052] It should be noted that the locking cover 121 is detachably arranged on the outer wall of the connecting piece 11. If the internal components need to be replaced, the locking cover 121 only needs to be removed from the outside of the connecting piece 11. At this time, the pressing sleeve 13 and the sealing sleeve 14 can be taken out from the connecting cavity 112. This arrangement can improve the convenience of the entire pipeline 15 connection structure during the disassembly and assembly process.

[0053] according to Figure 5 As shown, in some specific embodiments, the clamping portion 122 includes a plurality of elastically arranged buckles 1221, each buckle 1221 is arranged at intervals in the locking cover 121, and each buckle 1221 is arranged in a circular array to form a locking cavity 124 surrounding the outer wall of the pipeline 15; an inclined surface 123 is formed on one side of each buckle 1221.

[0054] Specifically, the buckle 1221 is made of elastic material and thus has a certain deformation capacity. When the pipeline 15 is inserted into the locking cavity 124, the buckle 1221 is squeezed by the pipeline 15 and then elastically deformed, thereby providing sufficient insertion space for the pipeline 15. At the same time, when the inclined surface 123 of each buckle 1221 is pressed by the annular inclined surface of the pressing sleeve 13, a radial pushing force is applied to the pipeline 15, so that each buckle 1221 can be simultaneously attached to the outer wall of the pipeline 15 to ensure that the pipeline 15 is firmly clamped. Since the multiple buckles 1221 are distributed in a circular array, they can evenly surround the outer wall of the pipeline 15. This arrangement can ensure that the pipeline 15 can be subjected to uniform clamping force in all directions, thereby forming a uniform locking force on the outer wall of the pipeline 15, and avoiding the pipeline 15 from loosening or falling off due to uneven force.

[0055] according to Figure 4 and Figure 5 As shown, in a further embodiment, a curved surface 1222 for fitting against the outer wall of the pipeline 15 is formed on a side of each buckle 1221 away from the inclined surface 123 .

[0056] Specifically, by providing a curved surface 1222 on one side of each buckle 1221, the contact area between the buckle 1221 and the outer wall of the pipeline 15 is increased, thereby providing a stronger locking force. This arrangement helps to ensure that when the pipeline is subjected to external force, it can better maintain its stability and prevent the pipeline from loosening or falling off; in addition, by having the curved surface 1222 fit against the outer wall of the pipeline 15, a certain sealing effect can be achieved, that is, when the buckle 1221 is squeezed, the curved surface 1222 of each buckle 1221 can fit tightly against the outer wall of the pipeline 15, thereby preventing fluid leakage.

[0057] In some specific embodiments, the outer side wall of the connecting member 11 is provided with a first thread; the inner side wall of the locking cover 121 is provided with a second thread that matches the first thread.

[0058] Specifically, in order to drive the locking cover 121 to move up or down along its axial direction, the second thread of the locking cover 121 is connected to the first thread of the connecting piece 11, so that when the locking cover 121 is pushed to rotate in the clockwise direction, under the spiral action of the first thread and the second thread, the rotational movement of the locking cover 121 is converted into a linear movement in the axial direction, so that the locking cover 121 can stably move up along its axial direction until the inclined surface 123 of each buckle 1221 fits with the annular inclined surface of the pressing sleeve 13; conversely, when the locking cover 121 is pushed to rotate in the counterclockwise direction, the locking cover 121 can stably move down along its axial direction until the inclined surface 123 of each buckle 1221 is separated from the annular inclined surface of the pressing sleeve 13. The first thread and the second thread cooperate to control the rising or falling movement of the locking cover 121 to achieve locking or releasing the pipeline 15.

[0059] It should be noted that when disassembling or assembling the locking cover 121 , it is only necessary to rotate the locking cover 121 . Through the action of the first thread and the second thread, the locking cover 121 can be quickly disassembled and removed or fixedly assembled to the outer wall of the connecting piece 11 .

[0060] according to Figure 3 As shown, in some specific embodiments, the outer side wall of the connecting member 11 is provided with a limiting portion 115 for limiting the movement range of the locking cover 121 .

[0061] Specifically, in order to prevent the locking cover 121 from moving excessively and causing the pipeline 15 to be squeezed and crushed, a limiting portion 115 is provided on the outer wall of the connecting piece 11. When the locking cover 121 rises and moves to a certain distance along its axial direction, the limiting portion 115 abuts against the locking cover 121 to clamp the locking cover 121 and prevent the locking cover 121 from continuing to rise and move. At this time, the annular inclined surface of the pressing sleeve 13 can fit tightly against the inclined surface 123 of each buckle 1221, so that the pushing force exerted by each buckle 1221 on the pipeline 15 can lock the pipeline 15 more firmly. At the same time, it can avoid the locking cover 121 exceeding the moving range, which causes the buckles 1221 to push the pipeline 15 too much.

[0062] It can be understood that the limiting portion 115 in the embodiment of the present invention is a protrusion or a step provided on the outer side wall of the connecting piece 11 , and the specific type is not limited here.

[0063] according to Figure 3 As shown, in some specific embodiments, a sealing sleeve 14 is provided between the outer wall of the pipeline 15 and the cavity wall of the connecting cavity 112 .

[0064] Specifically, when each buckle 1221 is tightly fitted to the outer wall of the pipeline 15 so that one end of the pipeline 15 can be stably inserted in the connecting cavity 112, in order to prevent the fluid from leaking outward at some gaps when the fluid flows through each pipeline 15, a sealing sleeve 14 is sleeved between the outer wall of the pipeline 15 and the cavity wall of the connecting cavity 112. Thus, the sealing sleeve 14 is elastically deformed to fill the tiny gap between the pipeline 15 and the connecting cavity 112, thereby forming a stronger sealing performance.

[0065] according to Figure 4 As shown, in some specific embodiments, the connection cavity 112 is recessed with a positioning cavity 1121 , and the positioning cavity 1121 is communicated with the communication port 113 ; one end of the pipeline 15 extends into the positioning cavity 1121 .

[0066] Specifically, by extending one end of the pipeline 15 into the connecting cavity 112 and finally into the positioning cavity 1121, the outer wall of the pipeline 15 is in contact with the cavity wall of the positioning cavity 1121. This arrangement can ensure that the pipeline 15 can be accurately inserted into the designated position in the connecting cavity 112, thereby avoiding misalignment of the pipeline 15 due to improper installation, which makes it difficult for the through hole at one end of the pipeline 15 to be accurately connected with the connecting port 113.

[0067] according to Figure 4 As shown, in some specific embodiments, the cavity wall of the connecting cavity 112 is formed with a guiding inclined surface 114 for guiding the movement of the pressing sleeve 13 , and the outer side wall of the pressing sleeve 13 is formed with an inclined surface for fitting with the guiding inclined surface 114 .

[0068] Specifically, since the pressing sleeve 13 can be taken out from the connecting cavity 112, in order to assemble the disassembled and taken out pressing sleeve 13 at the designated position in the connecting cavity 112, it is only necessary to first sleeve the pressing sleeve 13 on the outer wall of the clamping portion 122 (the inclined surface 123 of each buckle 1221 fits with the annular inclined surface of the pressing sleeve 13). When one end of the pipeline 15 is passed through the locking cavity 124 and extends to the inside of the connecting cavity 112, the outer side of the pressing sleeve 13 can be pushed to fit with the guide inclined surface 114 through the clamping portion 122. Under the guidance of the guide inclined surface 114, the pressing sleeve 13 is moved to the designated position in the connecting cavity 112 and is clamped between the cavity wall of the connecting cavity 112 and the outer wall of the clamping portion 122.

[0069] The pressing sleeve 13 in the above embodiment is a soft rubber sleeve, and thus, when the soft rubber sleeve is squeezed, it can generate a pushing force on each buckle 1221 of the clamping portion 122, so that each buckle 1221 can stably fit the outer wall of the pipeline 15, so that the pipeline 15 is locked.

[0070] It can be understood that the soft rubber sleeve of the embodiment of the present invention is made of elastic material, such as silicone, rubber, etc. This kind of soft rubber sleeve has good elasticity and plasticity. Therefore, when the soft rubber sleeve is squeezed, its material will deform, thereby generating a force for pushing each buckle 1221.

[0071] according to Figure 1-Figure 3 As shown, in some specific embodiments, the outer wall of the connecting piece 11 is provided with a plurality of driving parts 116 for assisting in pushing the locking cover 121 to rotate along its circumference. For example, when the user pushes each driving part 116, the entire locking cover 121 rotates along its circumference and moves up or down at the same time.

[0072] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A pipeline connection structure, characterized in that: The pipeline connection structure includes two interconnected connection components: each of the connection components includes: A connecting piece, wherein the connecting piece is hollow and has a flow cavity and a connecting cavity; the flow cavities of the connecting components are connected to each other; the connecting cavity is connected to the flow cavity through a connecting port; A locking assembly, the locking assembly comprising a locking cover and a clamping portion, the locking cover being movably sleeved on the outer wall of the connecting piece along the axial direction; the clamping portion being arranged in the locking cover, the clamping portion having a locking cavity passing through it, and being used for passing a pipeline through the locking cavity and then connecting it to the connecting port, and an inclined surface being formed on the outer side of the clamping portion; A pressing sleeve is arranged on the outer side of the clamping portion, and an annular inclined surface is formed on the inner side of the pressing sleeve for fitting against the inclined surface.

2. The pipeline connection structure according to claim 1, characterized in that: The clamping portion includes a plurality of elastically arranged buckles, each of which is arranged at intervals in the locking cover, and each of which is arranged in a circular array to form the locking cavity surrounding the outer side wall of the pipeline; The inclined surface is formed on one side of each of the buckles.

3. The pipeline connection structure according to claim 2, characterized in that: A curved surface for fitting to the outer side wall of the pipeline is formed on one side of each buckle away from the inclined surface.

4. The pipeline connection structure according to claim 1, characterized in that: The outer side wall of the connecting piece is provided with a first thread; the inner side wall of the locking cover is provided with a second thread matching with the first thread.

5. The pipeline connection structure according to claim 1, characterized in that: The outer side wall of the connecting piece is provided with a limiting portion for limiting the moving range of the locking cover.

6. The pipeline connection structure according to claim 1, characterized in that: A sealing sleeve is sleeved between the outer side wall of the pipeline and the cavity wall of the connecting cavity.

7. The pipeline connection structure according to claim 1, characterized in that: The connection cavity is recessed with a positioning cavity, and the positioning cavity is communicated with the communication port; one end of the pipeline extends into the positioning cavity.

8. The pipeline connection structure according to claim 1, characterized in that: The cavity wall of the connecting cavity is formed with a guiding inclined surface, and the outer side wall of the pressing sleeve is formed with an inclined surface for fitting with the guiding inclined surface.

9. The pipeline connection structure according to claim 1, characterized in that: The pressing sleeve is a soft rubber sleeve.

10. The pipeline connection structure according to claim 1, characterized in that: The outer side wall of the connecting piece is provided with a plurality of driving parts.

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