A pipe and connection structure for building water supply and drainage engineering

Abstract

This application relates to a pipe and connection structure for building water supply and drainage engineering, belonging to the field of prefabricated building technology. It includes a connecting conduit with a filter mechanism externally mounted on its exterior. A fixing mechanism is also externally mounted on the filter mechanism. The filter mechanism includes a filter box with multiple openings on its exterior. A cover is slidably connected to the top of the filter box, and a filter element is slidably connected inside the filter box. A connector is fixedly connected to the exterior of the connecting conduit. This application features a filter mechanism and a fixing mechanism that allow for easy disassembly and replacement of the filter element, continuously and efficiently intercepting impurities in the water to ensure water quality. The fixing mechanism employs a locking spring and sealing ring structure to achieve quick and accurate connection between the connecting pipe and the connecting conduit, effectively improving the reliability and ease of maintenance of the building water supply and drainage system.

Description

Technical Field

[0001] This application relates to the field of prefabricated building technology, and in particular to a pipe and connection structure for building water supply and drainage engineering. Background Technology

[0002] In the context of the booming development of modern construction engineering, water supply and drainage systems, as the "blood vessels" of buildings, directly affect the user experience and lifespan of buildings through their stability and functionality. As urban buildings move towards high-rise and intelligent structures, higher requirements are placed on the safety, durability, and convenience of water supply and drainage pipes and connecting structures. Efficient and reliable pipeline systems have become key to ensuring the safe operation of buildings and the quality of life for residents.

[0003] A search revealed Chinese patent publication number CN221323620U, which discloses a connection structure for building water supply and drainage pipes. The structure includes a first pipe with a spigot and a second pipe with a socket. The spigot is inserted into and mates with the socket. A sealing ring is provided between the spigot and the socket. An expansion sleeve is provided on the outside of the spigot, comprising a threaded portion and a locking head. A second sealing ring is provided between the threaded portion and the socket. A fixing sleeve is provided on the outside of the expansion sleeve, with one end extending to the socket and threadedly connected to the outside of the socket. The inner wall of the other end of the fixing sleeve mates with the locking head to lock the first pipe. This utility model connection structure facilitates installation and disassembly, facilitates the replacement of the sealing ring, and provides double sealing, resulting in strong sealing performance. It also facilitates construction and installation, improving assembly efficiency.

[0004] The aforementioned patent specification states that "the connection structure of this utility model is easy to install and disassemble, easy to replace the sealing ring, and has two seals, which have strong sealing performance. Building water supply and drainage pipes are mostly connected to each other through flanges, but this connection method is prone to leakage at the connection point and is difficult to align when docking. For the discharge of some medical wastewater, leakage may cause pollution risks. Therefore, a pipe and connection structure for building water supply and drainage engineering is proposed to solve the above problems." Utility Model Content

[0005] The purpose of this application is to provide a pipe and connection structure for building water supply and drainage engineering, which aims to improve the problem of some pipes being prone to loosening and leakage.

[0006] The technical solution provided in this application for a building water supply and drainage engineering pipe and connection structure is as follows: A building water supply and drainage engineering pipe includes a connecting conduit, a filter mechanism is provided on the outside of the connecting conduit, a fixing mechanism is provided on the outside of the filter mechanism, a connecting pipe is fixedly connected to the outside of the fixing mechanism, the filter mechanism includes a filter box, the filter box is fixedly connected to the outside of the connecting conduit, the filter box has multiple holes on its outside, a cover is slidably connected to the top of the filter box, a filter core is slidably connected to the inside of the filter box, and a connector is fixedly connected to the outside of the connecting conduit.

[0007] The above technical solution allows water containing impurities to enter the filter box through a connecting pipe. The holes on the outside of the filter box ensure the water flows in and out, while the internal filter element intercepts impurities, thus purifying the water. When maintenance is required, the filter element can be removed for cleaning or replacement by sliding open the cover. The purified water then flows through the connector on the connecting pipe, effectively improving the reliability and ease of maintenance of the building's water supply and drainage system.

[0008] Preferably, the fixing mechanism includes a locking spring, the locking spring being externally fixedly connected to the outside of the connecting tube, and a locking ball being externally fixedly connected to the locking spring;

[0009] By employing the above technical solution, during pipe connection, the connecting pipe is pushed towards the connector of the connecting conduit. At this time, the locking spring in the fixing mechanism is in a naturally extended state, and the locking ball fixed externally protrudes outward under the action of the spring force. When the connecting pipe approaches the connector, the external structure of the connector will squeeze the locking ball, forcing the locking spring to compress and deform. When the connector reaches the appropriate position, the locking spring returns to its elasticity, pushing the locking ball into the corresponding groove on the outside of the connector, completing the initial fixing of the connecting pipe and the connector.

[0010] Preferably, the locking ball is slidably connected to the outside of the connector, and a sealing ring is fixedly connected to the inside of the connecting tube, and the sealing ring is slidably connected to the outside of the connector.

[0011] By adopting the above technical solution, during the docking process between the connecting pipe 1 and the connecting conduit, the connecting pipe 1 is pushed closer to the connecting head, and the locking ball slides along the outside of the connecting head, gradually engaging with the corresponding groove of the connecting head under the action of the locking spring. Simultaneously, the sealing ring inside the connecting pipe 1 also slides to a predetermined position, tightly fitting the outer surface of the connecting head, as the connecting pipe 1 is advanced. Once the locking ball is fully engaged in the groove and initial fixation is completed, the sealing ring fills the connection gap through elastic deformation, forming a sealing layer to prevent water leakage from the connection.

[0012] A connection structure for quickly connecting pipes in a building water supply and drainage project as described above includes a second connecting pipe. A connecting mechanism is provided on the outside of the second connecting pipe. The connecting mechanism is rotatably connected to the outside of the first connecting pipe. The connecting mechanism includes a first fixing ring. The outside of the first fixing ring is threadedly connected to the outside of the second connecting pipe. The outside of the first fixing ring is rotatably connected to the outside of the first connecting pipe. A second fixing ring is rotatably connected inside the first fixing ring. The outside of the second fixing ring is fixedly connected to the outside of the first connecting pipe. A water-passing component is slidably connected inside the first connecting pipe.

[0013] By adopting the above technical solution, when connecting pipes, first bring connecting pipe two close to connecting pipe one, so that fixing ring one and fixing ring two in the connecting mechanism are aligned. Then, by rotating fixing ring one, using its threaded connection with connecting pipe two, fixing ring one rotates outside connecting pipe one and gradually moves closer. During this process, fixing ring one drives fixing ring two, which is internally rotated and connected, so that connecting pipe one and connecting pipe two move closer synchronously.

[0014] Preferably, a plurality of connecting rods are fixedly connected inside the connecting pipe, a fixed plate is fixedly connected to a side of the connecting rods, a buffer spring is sleeved on the outside of the protruding shaft of the fixed plate, and a water-stop ball is fixedly connected to the other end of the buffer spring.

[0015] By adopting the above technical solution, in the initial state of pipe connection, multiple connecting rods inside connecting pipe one support the fixed plate, and a buffer spring is sleeved on the external protruding shaft of the fixed plate. The water-stop ball, under the elastic force of the buffer spring, seals the internal channel of connecting pipe one, preventing water leakage. When connecting pipe two is connected to connecting pipe one through the connecting mechanism, the internal structure of connecting pipe two pushes the push tube in the water-passing assembly to move. The push tube squeezes the water-stop ball, causing the water-stop ball to compress the buffer spring and move away from the channel position. At this time, water can flow between connecting pipe one and connecting pipe two. When the pipes are disassembled, the buffer spring restores its elasticity, pushing the water-stop ball to re-seal the channel, preventing water leakage.

[0016] Preferably, the water-passing assembly includes a push tube, the outside of which is slidably connected to the outside of the connecting tube, and a sliding limiting ring is fixedly connected to the outside of the push tube;

[0017] By adopting the above technical solution, when connecting pipe one and connecting pipe two are connected, as connecting pipe two approaches connecting pipe one and rotates the fixing ring one through the connecting mechanism, the internal structure of connecting pipe two gradually contacts the push pipe in the water flow assembly and applies a thrust. Under the action of the thrust, the push pipe slides along the outside of connecting pipe one. The sliding limit ring fixedly connected to its outside maintains a stable movement trajectory under the limiting guidance of the sliding groove inside connecting pipe two, avoiding deviation or jamming. During the sliding process of the push pipe, it squeezes the water-stop ball and compresses the buffer spring, thereby opening the connection channel and realizing the flow of water between the two pipes.

[0018] Preferably, the outer side of the sliding limiting ring is fixedly connected to the outside of the pushing tube, and the outer side of the sliding limiting ring is slidably connected in the inner groove of the connecting tube 2;

[0019] By adopting the above technical solution, the sliding limiting ring fixedly connected to the outside of the push pipe slides along the pre-set groove inside the second connecting pipe. The cooperation between the sliding limiting ring and the groove provides guidance for the movement of the push pipe, restricting it to slide smoothly along the pipe axis and avoiding shaking or deviation. When the first connecting pipe and the second connecting pipe are connected, the push pipe is kept in the accurate position under the constraint of the sliding limiting ring, ensuring that the water-stop ball is stably pushed open and the water flows smoothly. When the pipe is disassembled, the sliding limiting ring also ensures that the push pipe is reset along the original path, driving the water-stop ball to re-seal the channel.

[0020] Preferably, the inner part of the second connecting pipe is fixedly connected to the outside of the other fixed plate, and the two outer ends of the pushing pipe are slidably connected to the inside of the two water-stopping balls;

[0021] By adopting the above technical solution, during the connection process between connecting pipe one and connecting pipe two, connecting pipe two connects to the corresponding structure inside connecting pipe one via an internally fixed plate. As connecting pipe two gradually approaches, its internal structure pushes the push tube in the water-passing assembly to move. The two ends of the push tube slide inside two water-stop balls, compressing the buffer springs by squeezing the water-stop balls, causing the water-stop balls to disengage from the connection channel position, thereby enabling water flow between connecting pipe one and connecting pipe two. When the pipe needs to be disassembled, the external force disappears, the buffer springs reset, pushing the water-stop balls back to their original position along the push tube, resealing the channel and preventing water leakage.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. Through the filtration mechanism and the fixing mechanism, multiple practical values ​​are achieved. The filtration mechanism allows for easy disassembly and replacement of the filter element, and can continuously and efficiently intercept impurities in the water to ensure water quality. The fixing mechanism adopts a structure that combines locking springs and sealing rings to achieve quick and accurate docking of the connecting pipe and the connecting conduit. It also ensures a firm connection and prevents leakage through elastic locking and sealing protection, effectively improving the reliability and maintenance convenience of the building water supply and drainage system.

[0024] 2. By rotating the fixing ring, the threaded structure is used to complete the initial tightening, ensuring the connection strength. At the same time, during the process of the pipe approaching, the ingenious design of the water-passing component allows the push pipe to automatically push open the water-stop ball and compress the buffer spring to achieve water passage, avoiding the cumbersome manual operation of the water-stopping component. In addition, the sliding limit ring ensures the smooth movement of the push pipe, while the buffer spring provides cushioning during the water passage process, effectively preventing pipe vibration or loosening of the interface caused by water flow impact, significantly improving the convenience, sealing and stability of building water supply and drainage pipe connection. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of the pipe and connection structure for a building water supply and drainage project proposed in this utility model;

[0026] Figure 2 This is a schematic diagram of the water-stop ball of the pipe and connection structure of the building water supply and drainage project proposed in this utility model;

[0027] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 This is a schematic diagram of the buffer spring in the pipe and connection structure of a building water supply and drainage project proposed in this utility model.

[0029] Explanation of reference numerals in the attached drawings: 1. Connecting conduit; 2. Filtering mechanism; 21. Cover; 22. Filter element; 23. Filter box; 24. Connector; 3. Connecting pipe one; 4. Connecting pipe two; 5. Connecting mechanism; 51. Connecting fixing ring; 52. Fixing ring; 53. Connecting rod; 54. Fixing disc; 55. Buffer spring; 56. Water-stop ball; 57. Water-passing assembly; 571. Pushing pipe; 572. Sliding limit ring; 6. Fixing mechanism; 61. Locking spring; 62. Locking ball; 63. Sealing ring. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1 -Appendix Figure 4 This application will be described in further detail below.

[0031] Example 1: A pipe for a building water supply and drainage project, referring to... Figures 1 to 3The invention includes a pipe for building water supply and drainage engineering, including a connecting conduit 1, which is the core channel for water flow transmission and connects different components of the water supply and drainage system. A filter mechanism 2 is provided on the outside of the connecting conduit 1. The filter mechanism 2 is used to intercept and filter impurities in the water flow to ensure water quality and prevent pipe blockage. A fixing mechanism 6 is provided on the outside of the filter mechanism 2. The fixing mechanism 6 is used to realize a stable connection between the connecting conduit 1 and the connecting pipe 3 and to ensure the sealing of the connection. The connecting pipe 3 is fixedly connected to the outside of the fixing mechanism 6.

[0032] The filtration mechanism 2 includes a filter box 23. The perforated design on the outside of the filter box 23 allows water to flow smoothly in and out to complete the filtration process. The filter box 23 is fixedly connected to the outside of the connecting pipe 1. The filter box 23 has multiple perforations on its outside. A cover 21 is slidably connected to the top of the filter box 23. The cover 21 is used to open or close the filter box 23 to facilitate maintenance and replacement of the internal filter element 22. The filter element 22 is slidably connected inside the filter box 23. The filter element 22 is used to remove impurities such as mud and sand and debris from the water flow through physical interception and other methods. A connector 24 is fixedly connected to the outside of the connecting pipe 1.

[0033] The fixing mechanism 6 includes a locking spring 61, which provides elastic restoring force to the locking ball 62 to ensure stable engagement between the connecting tube 3 and the connector 24. The locking spring 61 is externally fixedly connected to the outside of the connecting tube 3, and the locking ball 62 is externally fixedly connected to the outside of the locking spring 61. The locking ball 62 is used to quickly lock the connecting tube 3 and the connecting conduit 1 by engaging with the external slot of the connector 24.

[0034] The locking ball 62 is externally slidably connected to the outside of the connector 24. The inside of the connecting pipe 3 is fixedly connected to a sealing ring 63. The sealing ring 63 is used to fill the connection gap and prevent water from leaking from the connection between the connecting pipe 3 and the connector 24. The sealing ring 63 is externally slidably connected to the outside of the connector 24.

[0035] Specifically, the building water supply and drainage pipeline uses a corrosion-resistant, high-strength stainless steel connecting conduit 1 as the core channel for water flow transmission. Its external engineering plastic filter box 23 is equipped with a filter element 22 made of polypropylene fiber or activated carbon. Through the convenient opening and closing of the top cover 21, the water can efficiently intercept sediment and impurities in the water and perform regular maintenance of the filter element. After purification, the water flows through the connector 24 of the connecting conduit 1 and the connecting pipe 3. With the help of a high-elasticity spring steel locking spring 61, the locking ball 62 is pushed into the slot. The sealing ring 63 made of nitrile rubber or EPDM rubber fits tightly against the connector 24, forming a double guarantee of elastic locking and sealing protection. This achieves a fast and stable connection and prevents leakage, significantly improving the operational reliability and water quality of the water supply and drainage system.

[0036] Example 2: Connection structure, used for quick connection of pipes in a building water supply and drainage project as described above, refer to... Figure 1 , Figure 2 and Figure 4 It includes a second connecting pipe 4, which is used to connect with the first connecting pipe 3 to realize the connection between different pipe sections and expand the layout of the water supply and drainage system. The second connecting pipe 4 is provided with a connecting mechanism 5 on its outside. The connecting mechanism 5 is used to realize the quick and stable connection between the first connecting pipe 3 and the second connecting pipe 4, and to control the opening and closing of the water passage. The external part of the connecting mechanism 5 is rotatably connected to the outside of the first connecting pipe 3.

[0037] The connecting mechanism 5 includes a first fixing ring 51, which is used to connect to the second connecting pipe 4 via threads. When rotated, the relative position of the first connecting pipe 3 and the second connecting pipe 4 can be adjusted to achieve initial tightening. The external thread of the first fixing ring 51 is connected to the outside of the second connecting pipe 4, and the external part of the first fixing ring 51 is rotatably connected to the outside of the first connecting pipe 3. The internal part of the first fixing ring 51 is rotatably connected to a second fixing ring 52, which is fixed on the first connecting pipe 3 and cooperates with the first fixing ring 51 to ensure that the two pipes remain coaxial during the connection process and enhance the connection stability.

[0038] The external fixed connection of the second fixed ring 52 is to the outside of the first connecting pipe 3. The internal fixed sliding connection of the first connecting pipe 3 is to the water flow component 57. The water flow component 57 is used to control the opening and closing of the water flow channel to realize the automatic water flow function during the connection process.

[0039] Multiple connecting rods 53 are fixedly connected inside the connecting pipe 3. A fixed plate 54 is fixedly connected to the adjacent side of the connecting rod 53. The fixed plate 54 is used to withstand the spring force and water flow pressure. The connecting rods 53 are used to support the fixed plate 54, build a stable internal structural frame, and provide a mounting base for the buffer spring 55 and the water-stop ball 56. The buffer spring 55 is sleeved on the outside of the external protruding shaft of the fixed plate 54. The buffer spring 55 is used to buffer the water flow impact force during water flow, reduce pipe vibration, and provide elasticity when the pipe is separated, so that the water-stop ball 56 can be reset to seal the channel.

[0040] The other end of the buffer spring 55 is fixedly connected to a water-stop ball 56. Under normal conditions, the water-stop ball 56 blocks the internal channel of the connecting pipe 3 to prevent water leakage. During the connection process, it opens the channel after being squeezed by the push pipe 571 to allow water to flow.

[0041] The water-passing assembly 57 includes a push tube 571. During the connection process, the push tube 571 is pushed by the connecting tube 2 4, which squeezes the water-stop ball 56 and controls the opening and closing of the water passage. The outside of the push tube 571 is slidably connected to the outside of the connecting tube 1 3. A sliding limit ring 572 is fixedly connected to the outside of the push tube 571. The sliding limit ring 572 is used to limit the sliding trajectory of the push tube 571, ensuring that it moves smoothly along the axial direction and avoiding deviation that affects the water passage and sealing effect.

[0042] The sliding limit ring 572 is externally fixedly connected to the outside of the push tube 571, and the external sliding limit ring 572 is slidably connected to the inside groove of the connecting tube 2 4. The inside of the connecting tube 2 4 is fixedly connected to the outside of another fixed plate 54, and the two ends of the outside of the push tube 571 are slidably connected to the inside of two water-stop balls 56.

[0043] Specifically, the connection structure uses a high-strength plastic or metal connecting pipe 4 to connect pipe 3, achieving a quick and stable connection through an external connecting mechanism 5. The fixing ring 51 in the connecting mechanism 5 is threaded onto connecting pipe 4. Rotation adjusts the relative position of the two pipes and provides initial tightening. This, combined with the fixing ring 52 fixed to connecting pipe 3, ensures a coaxial and stable connection. During connection, connecting pipe 4 pushes the pusher pipe 571 in the water-passing assembly 57. Its external sliding limit ring 572 slides along the internal groove of connecting pipe 4, precisely controlling the movement trajectory. The pusher pipe 571 compresses the rubber-made water-stop ball 56 and the spring-steel buffer spring 55, opening the water passage. When the pipes separate, the buffer spring 55 resets, pushing the water-stop ball 56 to re-seal the passage, preventing water leakage. The internal support structure, consisting of a metal connecting rod 53 and a fixing plate 54, provides a stable installation base for the buffer spring 55 and the water-stop ball 56, withstands water flow pressure and spring force, and ensures that the entire connection structure can achieve quick connection and automatic water flow while having good sealing and stability, effectively improving the installation efficiency and operational reliability of the building water supply and drainage system.

[0044] The implementation principle of this application embodiment is as follows: When the filter element 22 traps a lot of impurities, affecting the water flow, the cover 21 is opened, the filter element 22 is pulled out from the filter box 23 for cleaning or replacement with a new filter element 22 to maintain the filtration effect. The connector 24 on the connecting tube 1 is aligned with the connection part of the connecting tube 3. The locking spring 61 outside the connecting tube 3 is in its natural state, and the locking ball 62 protrudes under the action of the spring force, pushing the connecting tube 3 towards the connector 24. The external structure of the connector 24 squeezes the locking ball 62, compressing the locking spring 61. When the connector 24 reaches the appropriate position, the locking ball 62, under the action of the locking spring 61, is inserted into the corresponding slot outside the connector 24, realizing the initial fixation of the connecting tube 3 and the connecting tube 1. During the connection process, the sealing ring 63 inside the connecting tube 3 tightly fits the outside of the connector 24, further enhancing the sealing of the connection and preventing water leakage.

[0045] Bring connecting pipe 2 4 close to connecting pipe 1 3, aligning fixing ring 1 51 with fixing ring 2 52 and rotating fixing ring 1 51 so that it rotates outside connecting pipe 1 3. Initial tightening is achieved through the threaded structure. Continue rotating fixing ring 1 51, driving fixing ring 2 52, so that connecting pipe 1 3 and connecting pipe 2 4 gradually approach each other. The internal structure of connecting pipe 2 4 pushes the push tube 571 in the water-passing assembly 57. The sliding limit ring 572 on the push tube 571 slides in the internal groove of connecting pipe 2 4, ensuring that the push tube 571 moves smoothly. When the push tube 571 moves, it squeezes the water-stop ball 56 and compresses the buffer spring 55 outside the connecting rod 53 and the fixing plate 54, causing the water-stop ball 56 to leave the internal channel of connecting pipe 1 3. At this time, water can flow between connecting pipe 1 3 and connecting pipe 2 4, completing the pipe connection and water passage.

[0046] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pipe for building water supply and sewerage works, comprising a connecting conduit (1), characterized in that, A filter mechanism (2) is provided on the outside of the connecting conduit (1), a fixing mechanism (6) is provided on the outside of the filter mechanism (2), and a connecting pipe (3) is fixedly connected to the outside of the fixing mechanism (6). The filtration mechanism (2) includes a filter box (23), the filter box (23) is fixedly connected to the outside of the connecting conduit (1), the filter box (23) has multiple holes on its outside, a cover (21) is slidably connected to the top of the filter box (23), a filter core (22) is slidably connected to the inside of the filter box (23), and a connector (24) is fixedly connected to the outside of the connecting conduit (1).

2. The plumbing for building water supply and drainage according to claim 1, wherein The fixing mechanism (6) includes a locking spring (61), which is externally fixed to the outside of the connecting tube (3), and a locking ball (62) is externally fixed to the outside of the locking spring (61).

3. The plumbing for building water supply and drainage according to claim 2, wherein The locking ball (62) is slidably connected to the outside of the connector (24), and a sealing ring (63) is fixedly connected inside the connecting tube (3), and the sealing ring (63) is slidably connected to the outside of the connector (24).

4. A connecting structure for quickly connecting a pipe of a building water supply and drainage work according to any one of claims 1 to 3, comprising a connecting pipe two (4), characterized in that, A connecting mechanism (5) is provided on the outside of the second connecting pipe (4), and the connecting mechanism (5) is rotatably connected to the outside of the first connecting pipe (3). The connecting mechanism (5) includes a first fixing ring (51), the outside of which is threadedly connected to the outside of the second connecting pipe (4), the outside of which is rotatably connected to the outside of the first connecting pipe (3), the inside of which is rotatably connected to a second fixing ring (52), the outside of which is fixedly connected to the outside of the first connecting pipe (3), and the inside of the first connecting pipe (3) is fixedly and slidably connected to a water-passing assembly (57).

5. The connection structure according to claim 4, characterized in that Multiple connecting rods (53) are fixedly connected inside the connecting pipe (3). A fixed plate (54) is fixedly connected to one side of the connecting rod (53). A buffer spring (55) is sleeved on the outside of the protruding shaft of the fixed plate (54). A water-stop ball (56) is fixedly connected to the other end of the buffer spring (55).

6. The connection structure according to claim 5, characterized in that The water supply assembly (57) includes a push tube (571), the outside of which is slidably connected to the outside of the connecting tube (3), and a sliding limiting ring (572) is fixedly connected to the outside of the push tube (571).

7. The connection structure according to claim 6, characterized in that The sliding limiting ring (572) is fixedly connected to the outside of the push tube (571), and the sliding limiting ring (572) is slidably connected to the inside groove of the connecting tube (4).

8. The connection structure according to claim 7, characterized by The inner part of the connecting pipe 2 (4) is fixedly connected to the outside of the other fixed plate (54), and the two outer ends of the push pipe (571) are slidably connected to the inside of the two water-stopping balls (56).

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