Plugging structure

Abstract

The utility model is suitable for the technical field of plugging equipment, and provides a plugging structure. The blocking structure is used for blocking liquid in the infusion pipeline from flowing out, the blocking structure comprises a mounting part and a blocking bag, the mounting part is provided with a mounting ring surface, a mounting ring groove is formed in the mounting ring surface of the mounting part, and the mounting part is sleeved with the blocking bag; the plugging bag has an expansion state, when the plugging bag is in the expansion state, part of the structure of the plugging bag is located in the mounting ring groove, and the other part of the structure of the plugging bag is located outside the mounting ring groove and used for abutting against the pipe wall of the infusion pipeline. The liquid conveying pipeline is blocked through the blocking structure, liquid in the liquid conveying pipeline can be prevented from flowing out, the blocking effect is guaranteed, the maintenance difficulty can be lowered, and the maintenance efficiency is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of plugging equipment, and more specifically, relates to a plugging structure. Background Art

[0002] An infusion pipeline for conveying liquid may rupture after being used for a period of time. In this case, the infusion pipeline needs to be repaired. However, since it has been used for a period of time, the water valve is often not closed tightly due to scaling of the water valve or aging of the seal during the repair, resulting in liquid still flowing in the infusion pipeline. At the same time, when the infusion pipeline is repaired, it is often necessary to use gluing to connect the pipe joint to the infusion pipeline. However, the glue-coated pipe joint will greatly affect the bonding effect when it encounters water, and may even fail to complete the connection work, which brings great difficulties to the repair work. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide a blocking structure, aiming to solve the technical problem in the prior art that it is difficult to repair an infusion pipeline when liquid is still flowing in the infusion pipeline.

[0004] To achieve the above-mentioned purpose, according to one aspect of the present application, a blocking structure is provided, which is used to block the liquid in the infusion pipeline from flowing out. The blocking structure includes a mounting piece and a blocking bag. The mounting piece has a mounting annular surface, and a mounting annular groove is provided on the mounting annular surface of the mounting piece. The blocking bag is sleeved on the mounting piece; the blocking bag has an expanded state. When the blocking bag is in the expanded state, part of the structure of the blocking bag is located in the mounting annular groove, and another part of the structure of the blocking bag is located outside the mounting annular groove, so as to be tightly pressed against the wall of the infusion pipeline.

[0005] Optionally, the blocking bag has a containing space, and the containing space of the blocking bag is filled with a filler for expanding the blocking bag; the blocking bag also has a contracted state, and a delivery tube is installed on the blocking bag, and the delivery tube is connected to the containing space of the blocking bag. The delivery tube is used to transport the filler into and out of the containing space of the blocking bag to switch the blocking bag between an expanded state and a contracted state.

[0006] Optionally, the filler is air; an adjustment control is installed in the delivery tube, and the adjustment control is used to allow or block the filler from entering or exiting the accommodating space of the blocking bag.

[0007] Optionally, the mounting piece is provided with a discharge hole for discharging the gas in the liquid infusion pipeline to the outside.

[0008] Optionally, the blocking structure further includes a discharge pipe, which is mounted on the mounting member and communicated with the discharge hole, and is used to communicate with an external pipeline.

[0009] Optionally, the mounting member includes a base and a mounting body, the mounting body is fixedly sleeved on the outer periphery of the base, the mounting annular groove is arranged on the peripheral surface of the mounting body away from the base, and the peripheral surface of the mounting body away from the base is formed as a mounting annular surface; a through hole is arranged on the peripheral surface of the mounting body close to the base, and the delivery pipe passes through the through hole and is located on the same side of the base as the discharge pipe.

[0010] Optionally, a first connecting member is hinged on the conveying pipe, a second connecting member is installed on the peripheral surface of the installation body close to the base, and the first connecting member and the second connecting member are connected by magnetic attraction.

[0011] Optionally, the blocking structure further includes a blocking column and a connecting rope, wherein the connecting rope is installed on the base body, the blocking column is connected to the connecting rope, and the blocking column is used to block the conveying pipe.

[0012] Optionally, the blocking structure further includes a blocking rod with adjustable length, which is mounted on the mounting body. The blocking rod and the delivery tube are both located on the same side of the base, and the blocking rod is used to press against the tube wall of the infusion pipeline.

[0013] Optionally, the depth of the mounting ring groove first gradually increases and then gradually decreases along the axial direction of the mounting member; when the blocking bag is in an expanded state, part of the structure of the blocking bag fits with the groove wall of the mounting ring groove.

[0014] The beneficial effect of the blocking structure provided by the present application is that, compared with the prior art, when the blocking structure in the present application blocks the infusion pipeline, the blocking structure is first installed in the infusion pipeline, and then the blocking bag is expanded. During this process, part of the structure of the blocking bag is always located in the mounting ring groove to avoid displacement and deformation of the blocking bag, and the other part of the structure of the blocking bag will gradually move outside the mounting ring groove and finally press against the wall of the infusion pipeline to avoid the liquid in the infusion pipeline from flowing out, thereby ensuring the bonding effect of the glue on the pipe joint to be bonded to the infusion pipeline; by using the blocking structure in the present application to block the infusion pipeline, not only can the liquid in the infusion pipeline be prevented from flowing out and the blocking effect be ensured, but also the difficulty of maintenance can be reduced and the maintenance efficiency can be improved. In addition, the mounting parts in the present application play an installation and supporting role, preventing the liquid in the infusion pipeline from collapsing the blocking structure and ensuring the blocking effect; the blocking airbag in the present application not only improves the sealing effect, thereby improving the blocking effect, but is also suitable for infusion pipelines of different sizes and shapes, such as straight pipelines, curved pipelines and branch pipelines, greatly broadening the scope of application of the blocking structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 A schematic diagram of the structure of the blocking structure in an expanded state provided in an embodiment of the present application blocking an infusion pipeline;

[0017] Figure 2 A schematic structural diagram of a blocking structure in an expanded state provided by an embodiment of the present application in a first viewing angle state;

[0018] Figure 3 An exploded schematic diagram of a plugging structure in an expanded state provided in an embodiment of the present application;

[0019] Figure 4 A schematic structural diagram of a blocking structure in an expanded state provided by an embodiment of the present application in a second viewing angle state;

[0020] Figure 5 A schematic structural diagram of a blocking structure in an expanded state provided in an embodiment of the present application having a first connecting member, a second connecting member, a blocking column, a connecting rope and a blocking rod.

[0021] The reference numerals in the above drawings are as follows:

[0022] 100, mounting part; 110, base; 111, discharge hole; 120, mounting body; 121, mounting ring groove; 122, outlet hole; 200, blocking bag; 300, delivery pipe; 400, discharge pipe; 500, first connecting part; 600, second connecting part; 700, blocking column; 800, connecting rope; 900, blocking rod; 1000, infusion pipeline. DETAILED DESCRIPTION

[0023] 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. 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.

[0024] 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. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element. In the absence of conflict, the embodiments in this application and the features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] 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.

[0026] 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, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] As described in the background technology, at present, the infusion pipeline for conveying liquid may rupture after being used for a period of time. In this case, the infusion pipeline needs to be repaired, but because it has been used for a period of time, the water valve is often not closed tightly due to scaling of the water valve or aging of the seal during the repair, resulting in liquid still flowing in the infusion pipeline; at the same time, when the infusion pipeline is repaired, it is often necessary to use gluing to connect the pipe joint to the infusion pipeline, but the pipe joint coated with glue will greatly affect the bonding effect after encountering water, and may even fail to complete the connection work, which brings great difficulties to the maintenance work.

[0028] Reference Figures 1 to 3In order to solve the above problems, according to one aspect of the present application, an embodiment of the present application provides a blocking structure, which is used to block the liquid in the infusion pipeline 1000 from flowing out. The blocking structure includes a mounting member 100 and a blocking bag 200. The mounting member 100 has a mounting annular surface, and a mounting annular groove 121 is provided on the mounting annular surface of the mounting member 100. The blocking bag 200 is sleeved on the mounting member 100; the blocking bag 200 has an expanded state. When the blocking bag 200 is in the expanded state, part of the structure of the blocking bag 200 is located in the mounting annular groove 121, and another part of the structure of the blocking bag 200 is located outside the mounting annular groove 121, which is used to press against the wall of the infusion pipeline 1000.

[0029] In the embodiment of the present application, the infusion pipeline 1000 is a water pipe, and the liquid in the infusion pipeline 1000 is water. Of course, in other embodiments, the infusion pipeline 1000 can also be a pipeline for conveying other liquids; the shape of the mounting member 100 is roughly cylindrical, and the mounting annular groove 121 is provided on the circumferential surface of the mounting member 100, and the circumferential surface of the mounting member 100 forms the mounting annular surface of the mounting member 100. The blocking capsule 200 is annular in shape, and the blocking capsule 200 is made of a soft and high-strength material, such as nylon cloth, polyester cloth or polyamide film. When the blocking capsule 200 is in an expanded state, the partial structure of the blocking capsule 200 located in the mounting annular groove 121 fits with the groove wall of the mounting annular groove 121, so that the blocking capsule 200 can be stably mounted on the mounting member 100.

[0030] When the blocking structure in the present application blocks the infusion pipeline 1000, the blocking structure is first installed in the infusion pipeline 1000, and then the blocking bag 200 is expanded. During this process, part of the structure of the blocking bag 200 is always located in the mounting ring groove 121 to avoid displacement and deformation of the blocking bag 200, and another part of the structure of the blocking bag 200 will gradually move outside the mounting ring groove 121, and finally press against the wall of the infusion pipeline 1000 to avoid the liquid in the infusion pipeline 1000 from flowing out, thereby ensuring the bonding effect of the glue on the pipe joint to be bonded to the infusion pipeline 1000; by using the blocking structure in the present application to block the infusion pipeline 1000, not only can the liquid in the infusion pipeline 1000 be prevented from flowing out and the blocking effect be ensured, but also the difficulty of maintenance can be reduced and the maintenance efficiency can be improved. In addition, the mounting member 100 in the present application plays an installation and supporting role, preventing the liquid in the infusion pipe 1000 from overcoming the blocking structure and ensuring the blocking effect; the blocking airbag in the present application not only improves the sealing effect, thereby improving the blocking effect, but is also suitable for infusion pipes 1000 of different sizes and shapes, such as straight pipes, curved pipes and branch pipes, greatly broadening the scope of application of the blocking structure.

[0031] Reference Figures 1 to 3In one embodiment, the blocking bag 200 has a containing space. When the blocking bag 200 is in an expanded state, the containing space of the blocking bag 200 is filled with a filler for expanding the blocking bag 200. The blocking bag 200 also has a contracted state. A delivery tube 300 is installed on the blocking bag 200. The delivery tube 300 is connected to the containing space of the blocking bag 200. The delivery tube 300 is used to transport the filler into and out of the containing space of the blocking bag 200, so that the blocking bag 200 can switch between the expanded state and the contracted state.

[0032] In this embodiment, the blocking bag 200 is an air bag, the filler is air, the inside of the air bag is hollow, so as to form an air chamber that can be filled with air, and the air chamber of the air bag forms the accommodation space of the blocking bag 200; of course, in other embodiments, the blocking bag 200 can also be a water bag, in which case the filler is water. When the blocking bag 200 needs to block the infusion pipeline 1000, after the blocking structure is transferred to the infusion pipeline 1000, the filler is transported to the accommodation space of the blocking bag 200 through the delivery tube 300, so that the blocking bag 200 and the tube wall of the infusion pipeline 1000 are tightly pressed. Subsequently, after the pipe joint is connected to the infusion pipeline 1000, the filler in the accommodating space of the blocking bag 200 is discharged outward through the delivery tube 300 to separate the blocking bag 200 from the tube wall of the infusion pipeline 1000, and then the blocking structure is moved out of the infusion pipeline 1000. Finally, the pipeline to be connected with the infusion pipeline 1000 is connected to the pipe joint to complete the maintenance work.

[0033] Reference Figures 1 to 3 In one embodiment, the filler is air; an adjustment control is installed in the delivery tube 300, and the adjustment control is used to release or block the filler from entering and exiting the accommodating space of the blocking bag 200.

[0034] In this embodiment, the delivery tube 300 is an air nozzle, and the adjustment control is an air nozzle core. The specific structures and specific assembly methods of the above two belong to the common knowledge of those skilled in the art, and will not be described in detail here. Of course, when the filler is water, the adjustment control is a water valve. The adjustment control has an open state and a closed state. When the adjustment control is in the open state, air can freely enter and exit the accommodation space of the blocking capsule 200, so that the blocking capsule 200 switches between an expanded state and a contracted state; when the adjustment control is in the closed state, the air in the blocking capsule 200 cannot be discharged to the outside through the delivery tube 300, and the outside air cannot enter the accommodation space of the blocking capsule 200 through the delivery tube 300, so as to ensure that the blocking capsule 200 can be stably in an expanded state or a contracted state. In addition, the adjustment control also plays a role in adjusting the air pressure in the accommodation space of the blocking capsule 200, so as to facilitate the adjustment of the pressing force applied by the blocking capsule 200 to the wall of the infusion pipeline 1000, and ensure the blocking effect of the blocking capsule 200. In order to enable the delivery tube 300 to smoothly deliver the filler, the delivery tube 300 includes a first tube segment connected to the blocking bag 200 and a second tube segment connected to the first tube segment, the length direction of the first tube segment is perpendicular to the length direction of the second tube segment, the length direction of the first tube segment is parallel to the radial direction of the blocking bag 200, the length direction of the second tube segment is parallel to the axial direction of the blocking bag 200, and the end of the second tube segment away from the first tube segment extends in a direction away from the blocking bag 200.

[0035] Reference Figure 1 and Figure 4 In one embodiment, the mounting member 100 is provided with a discharge hole 111 for discharging the gas in the infusion pipeline 1000. In this embodiment, the discharge hole 111 is a through hole, and the provided discharge hole 111 facilitates the discharge of the air or excess liquid in the infusion pipeline 1000, ensuring that the air pressure in the infusion pipeline 1000 is the same as the external air pressure, and avoiding the blocking structure from falling off and injuring people due to the increase of the air pressure in the infusion pipeline 1000. This design not only ensures the blocking effect of the blocking structure, but also improves the safety of the blocking structure.

[0036] Reference Figures 1 to 4 In one embodiment, the blocking structure further includes a discharge pipe 400, which is mounted on the mounting member 100, the discharge pipe 400 is connected to the discharge hole 111, and the discharge pipe 400 is used to communicate with an external pipeline.

[0037] In this embodiment, the discharge pipe 400 is fixedly mounted on the mounting member 100; the provided discharge pipe 400 plays a transitional and connecting role, and the gas or excess liquid in the infusion pipeline 1000 can be discharged into the external pipeline through the discharge pipe 400. This design not only ensures the cleanliness of the maintenance site, but also ensures the safety of the maintenance site. In addition, in order to facilitate the connection of the discharge pipe 400 with the external pipeline, a thread matching the thread of the external pipeline is provided on the pipe wall or the outer peripheral surface of the discharge pipe 400.

[0038] Reference Figures 2 to 4 In one embodiment, the mounting member 100 includes a base 110 and a mounting body 120, the mounting body 120 is fixedly sleeved on the outer periphery of the base 110, a mounting annular groove 121 is provided on the peripheral surface of the mounting body 120 away from the base 110, and the peripheral surface of the mounting body 120 away from the base 110 is formed as a mounting annular surface; a through hole 122 is provided on the peripheral surface of the mounting body 120 close to the base 110, and the delivery pipe 300 passes through the through hole 122 and is located on the same side of the base 110 as the discharge pipe 400.

[0039] In this embodiment, the base 110 is coaxial with the mounting body 120. The base 110 is cylindrical, the mounting body 120 is annular, the axial length of the base 110 is less than the axial length of the mounting body 120, and the two end faces of the base 110 are located between the two end faces of the mounting body 120 to reduce the overall weight of the plugging structure and to allow the through hole 122 to be provided on the peripheral surface of the mounting body 120 close to the base 110; the discharge hole 111 is provided on the base 110, and the discharge pipe 400 is installed on the base 110. 0; the design that the delivery tube 300 and the discharge tube 400 are both located on the same side of the base 110 enables the operation of the filler entering and exiting the accommodating space of the blocking bag 200 and the operation of the gas or excess liquid in the infusion pipeline 1000 being discharged outward through the discharge tube 400 to be carried out simultaneously, thereby improving the maintenance efficiency; in addition, in order to reduce the overall weight of the blocking structure and facilitate the processing and manufacturing of the mounting part 100, the base 110 and the mounting body 120 are both made of plastic material and manufactured by injection molding.

[0040] Reference Figure 5 In one embodiment, a first connecting member 500 is hinged on the delivery pipe 300, and a second connecting member 600 is installed on the peripheral surface of the mounting body 120 close to the base 110. The first connecting member 500 and the second connecting member 600 are connected by magnetic attraction.

[0041] In this embodiment, the first connector 500 is a flexible sheet made of ferromagnetic material, which can be wrapped around the outer periphery of the delivery tube 300 to pass through the through hole 122 together with the delivery tube 300; the second connector 600 is a magnet sheet, which is fixedly mounted on the peripheral surface of the mounting body 120 close to the base 110. The first connector 500 and the second connector 600 not only strengthen the connection strength between the output tube and the mounting body 120 and ensure the stability of the delivery tube 300, but also play a positioning role, making it easy to install the delivery tube 300 at a designated position.

[0042] Reference Figure 5 In one embodiment, the blocking structure further includes a blocking column 700 and a connecting rope 800 . The connecting rope 800 is installed on the base 110 . The blocking column 700 is connected to the connecting rope 800 . The blocking column 700 is used to block the delivery pipe 300 .

[0043] In this embodiment, the connecting rope 800 has a first end and a second end opposite to the first end, the first end of the connecting rope 800 is fixedly mounted on the base 110, and the second end of the connecting rope 800 is fixedly connected to the blocking column 700; the blocking column 700 can be inserted into the delivery pipe 300, and can also be pulled out from the delivery pipe 300. When the blocking column 700 is inserted into the delivery pipe 300, the circumferential surface of the blocking column 700 remains in contact with the wall of the delivery pipe 300, so as to achieve the purpose of blocking the delivery pipe 300.

[0044] Reference Figure 5 In one embodiment, the blocking structure further includes a blocking rod 900 with adjustable length, which is mounted on the mounting body 120 . The blocking rod 900 and the delivery tube 300 are both located on the same side of the base 110 . The blocking rod 900 is used to press against the wall of the infusion pipeline 1000 .

[0045] In the present embodiment, the blocking rod 900 is a telescopic rod, and the blocking rod 900 is fixedly mounted on the circumferential surface of the mounting body 120 close to the base body 110. There is a preset angle between the length direction of the blocking rod 900 and the radial direction of the mounting body 120, that is, the blocking rod 900 is inclined relative to the mounting body 120; when the blocking rod 900 needs to be pressed against the wall of the infusion pipe 1000, the blocking rod 900 can be stretched to be pressed against the wall of the infusion pipe 1000, and the set blocking rod 900 plays a blocking role, thereby preventing the blocking structure from falling off due to the impact of the liquid in the infusion pipe 1000. Of course, in other embodiments, the blocking rod 900 may also include a fixed rod body and a hinged rod body, wherein the fixed rod body has a first end and a second end opposite to the first end, the first end of the fixed rod body is fixedly mounted on the peripheral surface of the mounting body 120 close to the base 110, the hinged rod body is hinged on the second end of the fixed rod body, and the end of the hinged rod body away from the fixed rod body is used to press against the wall of the infusion pipeline 1000. In addition, in order to enhance the blocking effect, the number of blocking rods 900 is multiple, and the multiple blocking rods 900 are evenly arranged around the circumference of the mounting body 120.

[0046] Reference Figure 3 In one embodiment, the depth of the mounting ring groove 121 gradually increases and then gradually decreases along the axial direction of the mounting member 100 ; when the blocking bag 200 is in an expanded state, part of the structure of the blocking bag 200 fits against the groove wall of the mounting ring groove 121 .

[0047] In this embodiment, the mounting annular groove 121 is an arc groove; part of the structure of the blocking bag 200 is mounted in the mounting annular groove 121 and fits against the groove wall of the mounting annular groove 121. This design improves the stability of the blocking bag 200 on the mounting member 100 and ensures the blocking effect of the blocking structure.

[0048] Reference Figures 2 to 4 In one embodiment, a friction layer is coated on the surface of the blocking capsule 200 to prevent the blocking capsule 200 from rotating relative to the mounting member 100 or the infusion pipe 1000. In this embodiment, the friction layer is one of a gravel coating, a particle coating or a texture coating, and the surface of the blocking capsule 200 is fixedly coated with the friction layer, which can not only prevent the blocking capsule 200 from rotating relative to the infusion pipe 1000, but also prevent the blocking capsule 200 from rotating relative to the mounting member 100. Of course, in other embodiments, an adhesive layer is coated on the groove wall of the swivel groove, and the adhesive layer is used to connect the blocking capsule 200 to the mounting member 100, thereby strengthening the connection strength between the blocking capsule 200 and the mounting member 100.

[0049] In summary, the implementation of the blocking structure provided in this embodiment has at least the following beneficial technical effects: when the blocking structure in the present application blocks the infusion pipeline 1000, the blocking structure is first installed in the infusion pipeline 1000, and then the blocking bag 200 is expanded. During this process, part of the structure of the blocking bag 200 is always located in the mounting ring groove 121 to avoid displacement and deformation of the blocking bag 200, and another part of the structure of the blocking bag 200 will gradually move outside the mounting ring groove 121, and finally press against the wall of the infusion pipeline 1000 to avoid the liquid in the infusion pipeline 1000 from flowing out, thereby ensuring the bonding effect of the glue on the pipe joint to be bonded to the infusion pipeline 1000; by adopting the blocking structure in the present application to block the infusion pipeline 1000, not only can the liquid in the infusion pipeline 1000 be prevented from flowing out and the blocking effect be ensured, but also the maintenance difficulty can be reduced and the maintenance efficiency can be improved. In addition, the mounting member 100 in the present application plays an installation and supporting role, preventing the liquid in the infusion pipe 1000 from overcoming the blocking structure and ensuring the blocking effect; the blocking airbag in the present application not only improves the sealing effect, thereby improving the blocking effect, but is also suitable for infusion pipes 1000 of different sizes and shapes, such as straight pipes, curved pipes and branch pipes, greatly broadening the scope of application of the blocking structure.

[0050] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A blocking structure, characterized in that: The blocking structure is used to block the liquid in the infusion pipeline from flowing out. The blocking structure includes a mounting piece and a blocking bag. The mounting piece has a mounting annular surface, and a mounting annular groove is provided on the mounting annular surface of the mounting piece. The blocking bag is sleeved on the mounting piece. The blocking bag has an expanded state. When the blocking bag is in the expanded state, part of the structure of the blocking bag is located in the mounting annular groove, and another part of the structure of the blocking bag is located outside the mounting annular groove, which is used to press against the wall of the infusion pipeline. The depth of the mounting annular groove gradually increases and then gradually decreases along the axial direction of the mounting piece. When the blocking bag is in the expanded state, part of the structure of the blocking bag fits against the groove wall of the mounting annular groove.

2. The blocking structure according to claim 1, characterized in that: The blocking bag has a containing space, and the containing space of the blocking bag is filled with a filler for expanding the blocking bag; The blocking bag also has a contracted state. A delivery tube is installed on the blocking bag, and the delivery tube is connected to the storage space of the blocking bag. The delivery tube is used to transport the filler in and out of the storage space of the blocking bag to switch the blocking bag between the expanded state and the contracted state.

3. The blocking structure according to claim 2, characterized in that: The filler is air; an adjustment control is installed in the delivery tube, and the adjustment control is used to allow or block the filler from entering or exiting the accommodating space of the blocking bag.

4. The blocking structure according to claim 2, characterized in that: The mounting piece is provided with a discharge hole for discharging the gas in the liquid infusion pipeline to the outside.

5. The blocking structure according to claim 4, characterized in that: The blocking structure further includes a discharge pipe, which is mounted on the mounting member and communicates with the discharge hole, and is used to communicate with an external pipeline.

6. The blocking structure according to claim 5, characterized in that: The mounting member comprises a base and a mounting body, the mounting body is fixedly sleeved on the outer circumference of the base, the mounting annular groove is arranged on the circumferential surface of the mounting body away from the base, and the circumferential surface of the mounting body away from the base is formed as the mounting annular surface; a through hole is arranged on the circumferential surface of the mounting body close to the base, the delivery pipe passes through the through hole and is located on the same side of the base as the discharge pipe.

7. The blocking structure according to claim 6, characterized in that: A first connecting piece is hinged on the conveying pipe, a second connecting piece is installed on the peripheral surface of the mounting body close to the base, and the first connecting piece and the second connecting piece are connected by magnetic attraction.

8. The blocking structure according to claim 6, characterized in that: The blocking structure also includes a blocking column and a connecting rope, wherein the connecting rope is installed on the base, the blocking column is connected to the connecting rope, and the blocking column is used to block the conveying pipe.

9. The blocking structure according to claim 6, characterized in that: The blocking structure also includes a blocking rod with adjustable length, which is installed on the mounting body. The blocking rod and the delivery tube are both located on the same side of the base, and the blocking rod is used to press against the tube wall of the infusion pipeline.

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