Drainage spiral

Abstract

The utility model relates to the technical field of hydraulic engineering discloses a kind of drainage spiral pipe, comprising: spiral pipeline, at least two sections have;Multiple spiral notches are opened in the inner wall of spiral pipeline;It is accurately embedded with the connecting sleeve of built-in spiral strip and the spiral notch of spiral pipeline inner wall, realizes torsion positioning.Secondly, the hydraulic expansion mechanism of liquid chamber-piston-water bag, water bag radial expansion can be driven by incompressible liquid, drive spiral pipeline outer wall to metal sleeve sealing mouth interference paste, form stable outer seal;Thirdly, gear engagement driving structure is set, screw rotation is driven by rotating connecting ring, control piston advancing precision, improve the controllability and operation convenience of expansion response, effectively prevent connection site loosening or rebound.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy engineering technology, specifically to a drainage spiral pipe. Background Technology

[0002] In water conservancy engineering applications, functional pipes with optimized internal wall structures are often used to improve water flow efficiency and enhance flow guidance capacity within pipelines. The drainage spiral pipe is a typical example, featuring a spiral groove structure on its inner wall that guides water flow along a spiral path, creating a downward rotating flow pattern. This, to some extent, increases flow velocity and reduces water stagnation, making it suitable for flood drainage, diversion, and other water conservancy scenarios, especially advantageous in projects with gentle slopes and limited space.

[0003] These types of pipes are typically laid in sections to meet the requirements of complex working conditions. However, due to the continuous spiral groove structure on the inner wall, the sealing integrity at the joints becomes a key issue in the connection process. In existing technologies, drainage pipe connections mostly rely on rubber sealing rings, socket structures, or plug joints, but these sealing methods are primarily designed for standard pipes with smooth inner walls. When applied to spiral grooved pipes, the fit between the sealing ring and the inner wall is affected by the undulations of the grooves, easily leading to uneven contact surfaces and abnormal local stress, thus resulting in unstable sealing performance. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a drainage spiral pipe, which aims to alleviate the above problems to at least a certain extent.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A drainage spiral pipe, comprising: A spiral pipe, having at least two sections; Multiple spiral grooves are formed on the inner wall of the spiral pipe; A metal sleeve is provided between two adjacent spiral pipe sections, and a connecting sleeve adapted to the inner diameter of the spiral pipe is rotatably connected to the metal sleeve. Multiple spiral strips fixed to the outer wall of the connecting sleeve are adapted to the spiral groove. Connection ports are provided on both sides of the metal sleeve, the connecting sleeve is rotatably connected to the connection port, and the side wall of the connection port is provided with a sealing port, which has a predetermined distance from the connecting sleeve to adapt to the thickness of the spiral pipe. A sealing ring is provided on the inner wall of the sealing opening; An expansion member disposed between the metal sleeve and the connecting sleeve is used to apply a force to the end of the connecting sleeve to increase the diameter of the connecting sleeve.

[0006] Preferably, the expansion component includes a liquid cavity formed on the metal sleeve, the inner wall of the connection port is provided with a groove, a water bladder is provided in the groove, the water bladder is in communication with the liquid cavity, and the liquid cavity and the water bladder are filled with liquid.

[0007] Preferably, the expansion component further includes a piston slidably sleeved within the liquid chamber, a threaded tube fixed to the top of the piston, and a lead screw rotatably connected to the liquid chamber, which is threadedly engaged with the threaded tube.

[0008] Preferably, an infusion tube is connected to the liquid chamber, and the other end of the infusion tube is connected to the water bag.

[0009] Preferably, a connecting ring is rotatably connected to the outer wall of the metal sleeve, a gear a is fixed inside the connecting ring, a gear b that meshes with the gear a is fixed to the top of the lead screw, and the outer wall of the connecting ring is provided with shallow knurling.

[0010] Preferably, the metal sleeve is provided with limiting rings at both ends, located on the outer wall of the spiral pipe; a connecting rod that is slidably connected to the metal sleeve is connected to the limiting ring, a traction cable is fixed at one end of the connecting rod, and the other end of the traction cable is fixedly connected to the lead screw.

[0011] In summary, the present invention has the following main advantages: This application significantly improves the connection sealing performance and structural stability of drainage spiral pipes in water conservancy projects through the synergistic effect of multiple structures. First, a connecting sleeve with an internal spiral strip precisely engages with the spiral groove on the inner wall of the spiral pipe, achieving torsional positioning. Second, a hydraulic expansion mechanism consisting of a liquid chamber, piston, and water bladder drives the water bladder to expand radially through incompressible liquid, causing the outer wall of the spiral pipe to press against the metal sleeve sealing port, forming a stable external seal. Third, a gear meshing drive structure is used, rotating the connecting ring to drive the lead screw, controlling the piston's advance precision, and improving the controllability and ease of operation of the expansion response. Finally, a linkage limiting structure consisting of a traction cable and a limiting ring allows the limiting ring to gradually approach the metal sleeve during lead screw rotation, creating circumferential pressure on the outer wall of the spiral pipe. This constructs a dual constraint mechanism of "internal support + external limitation," effectively preventing loosening or rebound at the connection point, further enhancing the durability of the interface seal and its resistance to detachment. This mechanism is suitable for multi-stage spiral drainage systems with high sealing requirements and critical connection reliability. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the metal sleeve structure of this utility model; Figure 3 This is a cross-sectional structural schematic diagram of the metal sleeve of this utility model; Figure 4 yes Figure 3 Enlarged schematic diagram of the local structure at point A; Figure 5 yes Figure 3 A magnified view of the local structure at point B.

[0013] Figure label: 100. Spiral pipe; 101. Spiral groove; 102. Metal sleeve; 103. Connecting sleeve; 104. Spiral strip; 105. Connection port; 106. Sealing port; 107. Sealing ring; 200. Liquid chamber; 201. Groove; 202. Water bladder; 203. Piston; 204. Threaded tube; 205. Lead screw; 206. Infusion tube; 300. Connecting ring; 301. Gear a; 302. Gear b; 303. Limiting ring; 304. Connecting rod; 305. Traction cable. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] refer to Figure 1 - Figure 5 This embodiment provides a drainage spiral pipe, which includes at least two spiral pipe sections 100. The inner wall of each spiral pipe section 100 is provided with multiple spiral grooves 101 along the axial direction to guide water flow into a vortex-like flow pattern. To achieve reliable connection and sealing between adjacent spiral pipe sections 100, a metal sleeve 102 is provided at its interface. The metal sleeve 102 has a hollow structure and connection ports 105 at both ends.

[0016] In each connection port 105 of the metal sleeve 102, a connecting sleeve 103 is rotatably connected. The outer diameter of the connecting sleeve 103 is adapted to the inner diameter of the spiral pipe 100. The outer wall of the connecting sleeve 103 is provided with a plurality of spiral strips 104, which correspond one-to-one with the spiral grooves 101 on the inner wall of the spiral pipe 100, so that the connecting sleeve 103 can be inserted into the interior of the adjacent spiral pipe 100 and fit into the spiral grooves on its inner wall to achieve torsional positioning.

[0017] Inside each connection port 105 of the metal sleeve 102, an annular sealing port 106 is provided. The inner wall of the sealing port 106 is provided with an elastic sealing ring 107 for sealing against the outer wall of the spiral pipe 100. The connecting sleeve 103 and the spiral pipe 100 are tightly inserted, so that when the connecting sleeve 103 is inserted, it covers the port of the spiral pipe 100, and the end of the spiral pipe is fitted onto the outer circumference of the connecting sleeve 103. To achieve a sealing and tightening effect, an expansion member is provided between the metal sleeve 102 and the connecting sleeve 103, which can apply a radial outward expansion force to the connecting sleeve 103.

[0018] During installation, the workers insert the connecting sleeve 103 into the two sections of the spiral pipe 100 to be connected, ensuring that the spiral strip 104 is accurately embedded in the spiral groove 101. Then, by activating the expansion component, the connecting sleeve 103 expands radially, thereby causing the end of the spiral pipe 100 fitted to it to expand as well. In the expanded state, the outer wall of the spiral pipe 100 forms an interference fit with the sealing port 106 inside the connection port 105 of the metal sleeve 102. The elastic sealing ring 107 can further compensate for tolerances, forming a stable outer sealing layer.

[0019] Compared to existing technologies, this application employs an "external sealing" structural design, placing the sealing portion between the outer wall of the spiral pipe 100 and the sealing port 106 of the metal sleeve 102. This avoids uneven stress and sealing failure that might occur if the sealing ring directly acts on the inner spiral structure. The expansion of the connecting sleeve 103 causes the end of the spiral pipe 100 to expand outwards synchronously, resulting in a radial interference fit between its outer wall and the sealing port 106, thus forming a reliable sealing interface. The sealing ring 107, as an elastic transition component, can fully fill minute gaps under compression, improving the integrity of the interface seal.

[0020] Based on the above embodiments, the expansion component includes a liquid cavity 200 formed on a metal sleeve 102. An annular groove 201 is formed on the inner wall of the connection port 105 of the metal sleeve 102, and the groove 201 is used to accommodate the expansion medium support structure. Specifically, a flexible water bladder 202 is provided inside the groove 201. The water bladder 202 is made of an elastic impermeable material and is capable of radial expansion deformation under pressure.

[0021] The liquid chamber 200 is connected to the water bladder 202 through an internal channel and is pre-filled with a liquid medium, such as water, antifreeze, or other low-pressure fluid material. When an external force is applied to the liquid chamber 200, the liquid in the liquid chamber 200 flows into the water bladder 202, causing it to expand in volume and thus generating an outward radial thrust.

[0022] In this embodiment, the expansion component is based on the hydraulic drive principle and achieves directional and controllable radial expansion through the communication structure between the liquid chamber 200 and the water bladder 202. Specifically, the liquid chamber 200 serves as a liquid storage unit and is pre-filled with an incompressible liquid medium, preferably water, antifreeze, or a low-pressure liquid material with a certain viscosity. When pressure is applied to the liquid chamber 200, due to the incompressibility of the liquid, the liquid cannot be compressed under pressure and can only flow along the channel to the area with variable volume, that is, into the flexible water bladder 202 located in the groove 201 of the connection port 105.

[0023] After the water bladder 202 is forcibly filled with liquid, its internal pressure rises rapidly, and due to the good elasticity and extensibility of the water bladder 202 body, it expands radially outward. The pressure transmission path in this process is clear and stable, transmitted from the liquid cavity 200 through the channel to the interior of the water bladder 202, and then the expansion force is applied to the circumferential contact structure by the outer wall of the water bladder 202. Since the liquid itself is incompressible, the volume expansion applied to the water bladder 202 is highly responsive and controllable, which is beneficial for achieving precise control of the radial expansion range.

[0024] During the expansion of the water bladder 202, its outer wall first applies a uniform radial support force to the outer wall of the connecting sleeve 103, causing the connecting sleeve 103 to undergo a slight expansion deformation. At the same time, since the end of the spiral pipe 100 is sleeved on the outer periphery of the connecting sleeve 103, the expansion of the sleeve further drives the end of the spiral pipe to expand outward synchronously, thereby causing the outer wall of the spiral pipe 100 to press against the sealing port 106 area provided on the inner wall of the metal sleeve 102 connection port 105, ultimately forming a stable interference fit sealing interface.

[0025] Furthermore, in order to achieve controllable adjustment of the pressure of the expanding liquid, the expansion component also includes a piston 203 structure disposed inside the liquid chamber 200.

[0026] Specifically, a piston 203 is slidably sleeved inside the liquid chamber 200, and a threaded tube 204 is fixedly connected to the top of the piston 203. The threaded tube 204 is arranged along the axial direction of the liquid chamber 200. A lead screw 205 is provided on the outer shell of the liquid chamber 200 and is threadedly engaged with the threaded tube 204.

[0027] After the structure is installed, the lead screw 205 rotates. When the lead screw 205 rotates, it drives the threaded tube 204, which meshes with its thread, to move linearly along the axial direction, thereby driving the piston 203 to move forward inside the liquid chamber 200. When the piston 203 moves forward, the liquid inside the chamber is forced to be injected into the water bladder 202 through the connecting channel, causing the water bladder 202 to expand.

[0028] Based on the above embodiments, the liquid chamber 200 is further connected to the water bag 202 through the infusion tube 206 to establish a stable liquid transmission path.

[0029] Based on the above embodiments, in order to achieve convenient driving and controllable adjustment of the lead screw 205, a rotating mechanism for transmission operation is provided on the outside of the metal sleeve 102. Specifically, a connecting ring 300 is rotatably connected to the outer wall of the metal sleeve 102. A gear a301 is fixedly connected inside the connecting ring 300, and the gear a301 is arranged along the inner circumference of the connecting ring 300 to serve as the transmission input end.

[0030] The top of the lead screw 205 is provided with a gear b302, which meshes with the gear a301. The rotational force is transmitted from the connecting ring 300 to the lead screw 205 through the meshing relationship of the two gears.

[0031] To facilitate the application of rotational force to the connecting ring 300 by hand or tools, a shallow toothed structure is provided on the outer wall of the connecting ring 300. The shallow toothed structure is distributed along the outer periphery of the ring to form a regular interlocking profile, which facilitates the contact of wrenches, clamps or other driving tools with the connecting ring 300 and the application of torque. This enhances the operating friction and anti-slip ability, allowing operators to easily complete rotational adjustments in confined construction spaces.

[0032] This structure achieves stable and controllable rotational drive of the lead screw 205 by setting a connecting ring 300 on the outer periphery of the metal sleeve 102 and utilizing the meshing transmission between the gear a301 inside the connecting ring 300 and the gear b302 on the top of the lead screw 205. Specifically, when the operator uses a wrench or special tool to contact the shallow teeth on the outer wall of the connecting ring 300 and apply torque, the shallow teeth can significantly increase the contact friction, allowing the connecting ring 300 to be smoothly and steadily twisted. After the connecting ring 300 rotates, the gear a301 inside it rotates synchronously, driving the gear b302 to rotate through the meshing structure, thereby driving the lead screw 205 and achieving efficient axial feed of the piston 203.

[0033] During rotation, the lead screw 205 drives the threaded tube 204, which meshes with its thread, to move linearly, thereby pushing the piston 203 in the liquid chamber 200 forward axially. Since the liquid is incompressible, the forward movement of the piston 203 forces the liquid into the water bladder 202, causing the water bladder 202 to expand radially in a controllable manner. This further drives the connecting sleeve 103 and the end of the spiral pipe 100 to expand synchronously, so that the outer wall of the spiral pipe and the sealing port 106 of the metal sleeve 102 form a reliable and uniform interference seal.

[0034] Based on the above embodiments, in order to further improve the external constraint and positioning stability of the spiral pipe 100 during the expansion connection process, limiting rings 303 are respectively provided at both ends of the metal sleeve 102. The limiting rings 303 are sleeved on the outer periphery of the corresponding spiral pipe 100, and a gap is left between them and the end of the metal sleeve 102 in the initial state.

[0035] Each limiting ring 303 is connected to a connecting rod 304, which is slidably connected to the metal sleeve 102 along the axial direction, ensuring that the limiting ring 303 can move relative to the metal sleeve 102 in the axial direction. At the same time, a traction cable 305 is also fixedly connected to the end of the connecting rod 304, which extends through the metal sleeve 102 and is connected to the lead screw 205.

[0036] In the expansion connection process, this structure cleverly introduces a linkage structure of limiting ring 303, connecting rod 304, and traction cable 305 to achieve compression and limiting of the outer diameter of the spiral pipe 100, thereby improving the overall fastening effect of the interface connection.

[0037] Specifically, when the lead screw 205 is rotated, it drives the threaded tube 204 and piston 203 forward. On the one hand, it pushes the liquid into the water bladder 202, causing the water bladder 202 to expand and drive the connecting sleeve 103 and the end of the spiral pipe 100 to expand radially. On the other hand, the traction cable 305 fixed by the lead screw 205 gradually winds around its outer wall when it rotates, thereby pulling the connecting rod 304 to slowly approach the limiting ring 303 along the axial direction to the end of the metal sleeve 102.

[0038] As the limiting ring 303 approaches, its inner wall gradually presses against the outer circumference of the spiral pipe 100, causing the outer diameter of the spiral pipe 100 to be constrained by the limiting ring 303 while it expands radially. This combined effect of inner support and outer constraint effectively prevents the sealing loosening problem caused by the elastic recoil of the pipe body, and improves the overall connection's resistance to loosening and the durability of the seal.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drainage spiral pipe, characterized in that, include: The spiral pipe (100) has at least two sections; Multiple spiral grooves (101) are formed on the inner wall of the spiral pipe (100). A metal sleeve (102) is provided between two adjacent sections of the spiral pipe (100), and a connecting sleeve (103) adapted to the inner diameter of the spiral pipe (100) is rotatably connected to the metal sleeve (102). Multiple spiral strips (104) fixed to the outer wall of the connecting sleeve (103) are adapted to the spiral groove (101); Connection ports (105) are opened on both sides of the metal sleeve (102), the connecting sleeve (103) is rotatably connected to the connection port (105), and the side wall of the connection port (105) is provided with a sealing port (106), which has a predetermined distance from the connecting sleeve (103) to adapt to the thickness of the spiral pipe (100). A sealing ring (107) is provided on the inner wall of the sealing port (106). An expansion member is provided between the metal sleeve (102) and the connecting sleeve (103) for applying a force to the end of the connecting sleeve (103) to increase the diameter of the connecting sleeve (103).

2. A drainage spiral pipe according to claim 1, characterized in that, The expansion component includes a liquid cavity (200) formed on the metal sleeve (102), and a groove (201) is formed on the inner wall of the connection port (105). A water bladder (202) is provided in the groove (201), and the water bladder (202) is connected to the liquid cavity (200). The liquid cavity (200) and the water bladder (202) are filled with liquid.

3. A drainage spiral pipe according to claim 2, characterized in that, The expansion component also includes a piston (203) that is slidably sleeved in the liquid chamber (200). A threaded tube (204) is fixed to the top of the piston (203). A lead screw (205) is rotatably connected to the liquid chamber (200) and threadedly engaged with the threaded tube (204).

4. A drainage spiral pipe according to claim 2, characterized in that, The liquid chamber (200) is connected to an infusion tube (206), and the other end of the infusion tube (206) is connected to the water bag (202).

5. A drainage spiral pipe according to claim 3, characterized in that, The outer wall of the metal sleeve (102) is rotatably connected to a connecting ring (300), and a gear a (301) is fixed inside the connecting ring (300). A gear b (302) that meshes with the gear a (301) is fixed at the top of the lead screw (205), and the outer wall of the connecting ring (300) is provided with shallow tooth patterns.

6. A drainage spiral pipe according to claim 3, characterized in that, The metal sleeve (102) is provided with limiting rings (303) at both ends, located on the outer wall of the spiral pipe (100). The limiting rings (303) are connected to a connecting rod (304) that is slidably connected to the metal sleeve (102). The end of the connecting rod (304) is fixed with a traction cable (305), and the other end of the traction cable (305) is fixedly connected to the lead screw (205).

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