A municipal water supply pipeline anti-leakage connecting structure

Abstract

The utility model discloses a kind of municipal water supply pipeline anti-seepage connecting structures, it includes main sleeve, sealing assembly and locking device. Annular groove and reinforcing rib are equipped in main sleeve, sealing assembly is composed of sealing ring, locating ring and elastic support strip, locking device contains locking ring, dog and operating handle. The structure is cooperated by multilayer sealing design and mechanical locking mode, solve the leakage problem caused by the sealing of pipeline connection place is not strict or material aging, improve the anti-seepage performance and stability, simplify installation process simultaneously, reduce maintenance cost, applicable to the municipal water supply pipeline engineering under complex geological conditions.

Description

Technical Field

[0001] This utility model relates to the field of municipal water supply engineering technology, and in particular to a leak-proof connection structure for municipal water supply pipelines. Background Technology

[0002] Currently, preventing leakage at pipe joints is a key focus and challenge in the construction of municipal water supply pipelines. Due to the long-term stress of internal water pressure and external environmental factors, leaks easily occur at joints due to inadequate sealing or material aging. This is especially true in complex geological conditions, such as areas with soil subsidence or significant temperature differences, where stress changes at pipe joints further exacerbate the risk of leakage. To ensure the reliability of the water supply system, additional sealing treatments are usually required for the joint structure, such as using sealing rings or wrapping with waterproof materials. However, these methods often require high construction precision in practice, and their sealing effect may gradually weaken over time, making it difficult to fully meet the long-term leakage prevention requirements. Utility Model Content

[0003] The purpose of this utility model is to provide a leak-proof connection structure for municipal water supply pipelines, which solves the problems mentioned in the background art.

[0004] This utility model is implemented as follows: a leak-proof connection structure for municipal water supply pipelines, which mainly consists of a main sleeve, a sealing component disposed inside the main sleeve, and locking devices fixed at both ends of the main sleeve. The main sleeve serves as the main structure, and the sealing component and locking devices are both installed on the main sleeve to achieve the leak-proof function at the pipeline connection.

[0005] The main sleeve is a cylindrical hollow structure with annular grooves on its inner wall. These grooves are evenly distributed along the axial direction of the main sleeve to accommodate the sealing components. The depth and width of the annular grooves are designed according to the elastic modulus of the pipe material to accommodate pipes of different materials. The outer wall of the main sleeve is provided with reinforcing ribs, which are arranged along the circumferential direction of the main sleeve to enhance its overall strength and resistance to deformation.

[0006] The sealing assembly includes a sealing ring, a positioning ring disposed on the outside of the sealing ring, and an elastic support strip embedded inside the sealing ring. The sealing ring is made of a high-polymer elastic material with an "I"-shaped cross-section. The middle portion is embedded in the annular groove of the main sleeve, while the two sides extend outwards and fit tightly against the outer wall of the pipe. The positioning ring is fixed to the inner side of the annular groove of the main sleeve via a threaded connection, used to restrict the axial movement of the sealing ring. The elastic support strip, made of shape memory alloy, is embedded in the internal cavity of the sealing ring and can return to its original shape after being compressed, thereby applying continuous radial pressure to the sealing ring and ensuring that the sealing ring always maintains tight contact with the outer wall of the pipe.

[0007] The locking device includes a locking ring, claws disposed inside the locking ring, and an operating handle fixed to the outside of the locking ring. The locking ring is threaded to both ends of the main sleeve, and its inner side has claws with arc-shaped ends that allow point contact with the outer wall of the pipe. The operating handle is hinged to the locking ring via a pin. Rotation of the operating handle causes the locking ring to move axially along the main sleeve, thereby pressing the claws against the outer wall of the pipe. An anti-slip pad made of rubber is also provided inside the locking ring to increase friction between the claws and the pipe, preventing slippage during the locking process.

[0008] The main sleeve has guide ramps at both ends, with an angle of 30° to 45°, used to guide the pipe into the main sleeve. The surface of the guide ramps is coated with a lubricating coating, the main component of which is polytetrafluoroethylene, which can reduce the frictional resistance when the pipe is inserted, making it easier for construction personnel to perform installation operations.

[0009] The outer side of the sealing ring is provided with a corrugated structure, which is evenly distributed along the circumference of the sealing ring to increase its elastic deformation capacity. The corrugation height is 1mm to 2mm, the trough depth is 0.5mm to 1mm, and the corrugation spacing is 3mm to 5mm. These parameters are designed so that the sealing ring can produce uniform elastic deformation when subjected to external pressure, thereby improving the sealing effect.

[0010] The elastic support strip has a V-shaped cross-section, with its opening facing the inner cavity of the sealing ring. Protrusions are provided on both sides of the elastic support strip, which are embedded in grooves in the inner wall of the sealing ring to limit radial movement of the elastic support strip. The elastic support strip is made of nickel-titanium alloy, which has excellent shape memory properties and corrosion resistance, and can maintain stable elastic characteristics during long-term use.

[0011] The number of clamping jaws is 6 to 8, evenly distributed on the inner side of the locking ring. Each clamping jaw has a ball bearing at its end; the outer ring of the ball bearing contacts the outer wall of the pipe, allowing it to roll during locking and reducing friction between the clamping jaws and the pipe. The inner ring of the ball bearing is fixed to the end of the clamping jaw with screws for easy disassembly and replacement.

[0012] This utility model discloses a leak-proof connection structure for municipal water supply pipelines. Through the synergistic effect of a main sleeve, sealing components, and a locking device, it solves the leakage problem at pipe connections caused by inadequate sealing or material aging in existing technologies. The annular groove and reinforcing ribs of the main sleeve improve the overall strength and stability of the connection structure; the sealing ring, positioning ring, and elastic support strip in the sealing components achieve a highly efficient sealing effect through a multi-layered structure; the claws and operating handle in the locking device firmly fix the pipeline mechanically, preventing loosening caused by changes in external stress. This technical solution not only significantly improves the leak-proof performance of pipe connections but also simplifies the construction process, reduces maintenance costs, and is suitable for municipal water supply pipeline laying projects under various complex geological conditions. Attached Figure Description Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the present invention.

[0013] The attached diagram is labeled as follows: 1. Main sleeve; 2. Sealing ring; 3. Positioning ring; 4. Elastic support bar; 5. Locking ring; 6. Claw; 7. Operating handle; 8. Guide slope; 9. Corrugated structure; 10. Ball bearing. Detailed Implementation The specific implementation method of this utility model's anti-leakage connection structure for municipal water supply pipelines is described in detail with reference to the accompanying drawings. For example... Figure 1 As shown, the overall structure includes a main sleeve 1, a sealing assembly, and a locking device. The sealing assembly is installed in an annular groove on the inner side of the main sleeve 1, and the locking device is fixed at both ends of the main sleeve 1. The main sleeve 1 is a cylindrical hollow structure with reinforcing ribs on its outer wall to enhance overall strength, and annular grooves evenly distributed along the axial direction on its inner wall to accommodate the sealing assembly. Guide slopes 8 are provided at both ends of the main sleeve 1, with an angle of 30° to 45°, and their surfaces are coated with a polytetrafluoroethylene lubricating coating to facilitate pipe insertion.

[0014] The sealing assembly consists of a sealing ring 2, a positioning ring 3, and an elastic support strip 4. For example... Figure 2As shown, the sealing ring 2 is made of a high-polymer elastic material with an "I"-shaped cross-section. The middle part is embedded in the annular groove of the main sleeve 1, while the two sides extend outwards and fit against the outer wall of the pipe. The outer side of the sealing ring 2 has a corrugated structure 9, which is uniformly distributed circumferentially. The peak height is 1mm to 2mm, the trough depth is 0.5mm to 1mm, and the corrugation spacing is 3mm to 5mm. The design of the corrugated structure 9 allows the sealing ring 2 to produce uniform elastic deformation under external pressure. The positioning ring 3 is fixed to the inner side of the annular groove of the main sleeve 1 via a threaded connection to limit the axial movement of the sealing ring 2. The elastic support strip 4 is embedded in the internal cavity of the sealing ring 2, with a "V"-shaped cross-section and its opening facing the internal cavity of the sealing ring 2. The elastic support strip 4 has protrusions on both sides, which are embedded in the grooves on the inner wall of the sealing ring 2 to limit its radial movement. The elastic support strip 4 is made of nickel-titanium alloy, possessing shape memory properties and corrosion resistance.

[0015] The locking device includes a locking ring 5, a pawl 6, and an operating handle 7. For example... Figure 2 As shown, the locking ring 5 is installed at both ends of the main sleeve 1 via a threaded connection, and its inner side has 6 to 8 evenly distributed claws 6. The ends of the claws 6 are arc-shaped and equipped with ball bearings 10. The outer ring of the ball bearings 10 contacts the outer wall of the pipe and can roll during the locking process to reduce friction. The inner ring of the ball bearings 10 is fixed to the ends of the claws 6 with screws for easy disassembly and replacement. The operating handle 7 is hinged to the locking ring 5 via a pin. Rotating the operating handle 7 moves the locking ring 5 along the axial direction of the main sleeve 1, thereby pressing the claws 6 against the outer wall of the pipe. The inner side of the locking ring 5 is also equipped with an anti-slip pad made of rubber to increase the friction between the claws 6 and the pipe and prevent slippage during the locking process.

[0016] In actual construction, the two sections of pipe to be connected are first inserted into the two ends of the main sleeve 1. The design of the guide ramp 8 makes the pipe insertion smoother. After the pipe is inserted, the two sides of the sealing ring 2 fit tightly against the outer wall of the pipe. The positioning ring 3 restricts the axial movement of the sealing ring 2, and the elastic support strip 4 applies continuous radial pressure to the sealing ring 2 to ensure that it always maintains tight contact with the outer wall of the pipe. Then, by rotating the operating handle 7, the locking ring 5 moves along the axial direction of the main sleeve 1. The end of the chuck 6 forms point contact with the outer wall of the pipe through the ball bearing 10 and gradually tightens. The anti-slip pad further enhances the friction between the chuck 6 and the pipe, preventing loosening due to changes in external stress.

[0017] The annular groove and reinforcing rib design of the main sleeve 1 improve the overall strength and stability of the connection structure. The sealing ring 2, positioning ring 3, and elastic support strip 4 in the sealing assembly achieve a highly efficient sealing effect through a multi-layer structure. The locking claw 6 and operating handle 7 in the locking device firmly fix the pipeline mechanically. The above technical solution not only significantly improves the anti-leakage performance of the pipeline connection, but also simplifies the construction operation process and reduces maintenance costs, making it suitable for municipal water supply pipeline laying projects under various complex geological conditions. To better enable those skilled in the art to fully understand and implement this utility model, the specific implementation principle of this utility model is further explained below in conjunction with a specific application scenario.

[0018] In actual construction, the two sections of pipe to be connected are first inserted into both ends of the main sleeve 1. Because the main sleeve 1 has guide ramps 8 at both ends with an angle of 30° to 45° and a PTFE lubricating coating, the pipes can slide smoothly during insertion, reducing operational difficulties caused by friction. The guide ramps 8 not only facilitate quick pipe positioning by construction personnel but also effectively prevent damage to the sealing components due to improper insertion.

[0019] Once the pipe is inserted, the sealing ring 2 fits tightly against the outer wall of the pipe on both sides. The sealing ring 2 is made of a high-polymer elastic material with an "I"-shaped cross-section. The middle part is embedded in the annular groove of the main sleeve 1, while the two sides extend outwards and contact the outer wall of the pipe. This structural design allows the sealing ring 2 to undergo uniform elastic deformation under external pressure, thus ensuring a tight seal. Simultaneously, the corrugated structure 9 on the outer side of the sealing ring 2 is evenly distributed circumferentially, with a crest height of 1mm to 2mm, a trough depth of 0.5mm to 1mm, and a corrugation spacing of 3mm to 5mm. These parameters further enhance the sealing performance of the sealing ring 2 under external water pressure or soil stress changes, preventing leakage.

[0020] The positioning ring 3 is fixed to the inner side of the annular groove of the main sleeve 1 via a threaded connection, which restricts the axial movement of the sealing ring 2. This fixing method not only ensures that the sealing ring 2 will not shift due to water flow impact or external stress during long-term use, but also facilitates the quick adjustment of the position of the sealing ring 2 by construction personnel during installation. At the same time, the elastic support strip 4 embedded in the internal cavity of the sealing ring 2 applies continuous radial pressure to it. The cross-section of the elastic support strip 4 is "V" shaped, with the opening facing the internal cavity of the sealing ring 2. It is made of nickel-titanium alloy and has shape memory properties and corrosion resistance. This design allows the elastic support strip 4 to return to its original shape after being compressed and apply stable radial pressure to the sealing ring 2, thereby ensuring that the sealing ring 2 always maintains tight contact with the outer wall of the pipe, and can effectively cope with the stress effects caused by soil settlement or temperature difference changes even under complex geological conditions.

[0021] Subsequently, rotating the operating handle 7 moves the locking ring 5 along the axial direction of the main sleeve 1. The inner side of the locking ring 5 has 6 to 8 evenly distributed claws 6, the ends of which are arc-shaped and equipped with ball bearings 10. The outer ring of the ball bearing 10 contacts the outer wall of the pipe, allowing it to roll during locking to reduce friction, thus reducing construction difficulty and improving locking efficiency. The inner ring of the ball bearing 10 is fixed to the end of the claw 6 with screws, facilitating disassembly and replacement and extending the service life of the locking device. As the locking ring 5 moves, the claws 6 gradually press against the outer wall of the pipe, forming point contact to ensure the pipe is firmly fixed. Furthermore, the anti-slip pads on the inner side of the locking ring 5 are made of rubber, increasing the friction between the claws 6 and the pipe and preventing loosening due to changes in external stress.

[0022] The annular groove and reinforcing ribs of the main sleeve 1 improve the overall strength and stability of the connection structure. The annular grooves are evenly distributed along the axial direction of the main sleeve 1 to accommodate the sealing components. Their depth and width are designed according to the elastic modulus of the pipe material to adapt to pipes of different materials. The reinforcing ribs are arranged along the circumferential direction of the main sleeve 1, enhancing its resistance to deformation and enabling it to maintain good mechanical properties even under long-term exposure to internal water pressure and external environmental influences.

[0023] In summary, this invention achieves highly efficient leak-proof functionality at pipe connections through the synergistic action of the main sleeve 1, the sealing assembly, and the locking device. The guide bevel 8 and lubricating coating design of the main sleeve 1 simplify the construction process. The sealing ring 2, positioning ring 3, and elastic support strip 4 in the sealing assembly ensure a highly efficient sealing effect through their multi-layered structure. The claws 6 and operating handle 7 in the locking device mechanically and firmly fix the pipe, preventing loosening caused by changes in external stress. This technical solution not only significantly improves the leak-proof performance of pipe connections but also reduces maintenance costs, making it suitable for municipal water supply pipeline laying projects under various complex geological conditions.

[0024] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A leak-proof connection structure for municipal water supply pipelines, characterized in that, The municipal water supply pipeline anti-leakage connection structure mainly consists of a main sleeve (1), a sealing component set inside the main sleeve (1), and a locking device fixed at both ends of the main sleeve (1). The main sleeve (1) is a cylindrical hollow structure with an annular groove on its inner wall and reinforcing ribs on its outer wall. The sealing component includes a sealing ring (2), a positioning ring (3), and an elastic support strip (4). The locking device includes a locking ring (5), a claw (6), and an operating handle (7). (5) The locking ring (5) is installed at both ends of the main sleeve (1) by threaded connection. The inner side of the locking ring (5) is provided with 6 to 8 evenly distributed claws (6). The end of the claw (6) is provided with a ball bearing (10). The outer ring of the ball bearing (10) is in contact with the outer wall of the pipe, and the inner ring is fixed to the end of the claw (6) by screws. The operating handle (7) is hinged to the locking ring (5) by a pin. The inner side of the locking ring (5) is provided with an anti-slip pad, which is made of rubber.

2. The anti-leakage connection structure for municipal water supply pipelines according to claim 1, characterized in that: The main sleeve (1) has guide slopes (8) at both ends, the angle of the guide slopes (8) is 30° to 45°, and the surface is coated with a polytetrafluoroethylene lubricating coating.

3. The anti-leakage connection structure for municipal water supply pipelines according to claim 1, characterized in that: The sealing ring (2) has an "I" shaped cross section. The middle part is embedded in the annular groove of the main sleeve (1), and the two sides extend outward and fit against the outer wall of the pipe. The outer side of the sealing ring (2) is provided with a corrugated structure (9). The corrugated structure (9) is evenly distributed in the circumference, with a peak height of 1mm to 2mm, a trough depth of 0.5mm to 1mm, and a corrugation spacing of 3mm to 5mm.

4. The anti-leakage connection structure for municipal water supply pipelines according to claim 1, characterized in that: The elastic support strip (4) has a "V" shaped cross section with the opening facing the internal cavity of the sealing ring (2). The elastic support strip (4) has protrusions on both sides, which are embedded in the grooves of the inner wall of the sealing ring (2). The elastic support strip (4) is made of nickel-titanium alloy.

5. The anti-leakage connection structure for municipal water supply pipelines according to claim 1, characterized in that: The positioning ring (3) is fixed to the inner side of the annular groove of the main sleeve (1) by a threaded connection, which is used to restrict the axial movement of the sealing ring (2).

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