Municipal water supply pipeline plugging device

Abstract

The utility model discloses a municipal water supply pipeline blocking device. The municipal water supply pipeline blocking device comprises a base, a driving mechanism, a sealing module and an adjusting assembly. The base is disc-shaped and is provided with an annular groove and a through hole; the driving mechanism is composed of a lead screw and a hand wheel and used for pushing the base to move. The sealing module comprises a flexible sealing ring and an arc-shaped pressing plate and is fixed to the base through bolts. The adjusting assembly is composed of a telescopic rod and an adjusting nut and used for adjusting the contact pressure between the sealing ring and the inner wall of the pipeline. The sealing performance is improved through the annular protrusions on the surface of the flexible sealing ring and lubricating grease, the adjusting flexibility is guaranteed through the telescopic rod and the spherical hinge, and the stability is enhanced through the positioning pin and the arc-shaped pressing plate. The pipe plugging device solves the problems that an existing pipe plugging device is not tight in sealing and complex in operation, plugging reliability and construction efficiency are improved, and the pipe plugging device has high practical value.

Description

Technical Field

[0001] This utility model relates to the field of municipal water supply engineering technology, and in particular to a pipe plugging device for municipal water supply pipelines. Background Technology

[0002] In the maintenance and repair of municipal water supply pipelines, pipe plugs are crucial equipment used for temporary pipe closure. This step is particularly important for water supply pipelines because water pressure may exist within the pipes; only effective sealing can ensure the safety and effectiveness of construction or repair. This helps improve overall operational efficiency and avoids water waste.

[0003] Because municipal water supply pipelines typically have large diameters and high pressures, existing pipe plugging devices mostly achieve sealing through mechanical expansion or air inflation. However, in practical use, these devices may experience incomplete sealing due to aging of the seals or improper installation, making it difficult to fully meet the sealing requirements. Furthermore, the operation procedures of some devices are quite complex, increasing the time cost of on-site construction. Therefore, existing pipe plugging devices still have certain limitations in practical applications. Utility Model Content

[0004] The purpose of this utility model is to provide a pipe plugging device for municipal water supply pipelines, which solves the problems mentioned in the background art.

[0005] This utility model is implemented as follows: a municipal water supply pipeline plugging device includes a base, a drive mechanism, a sealing module, and an adjustment component. The specific structure is as follows:

[0006] The base is a disc-shaped structure with an outer diameter that matches the inner diameter of the pipe to be sealed. One side of the base has an annular groove with multiple evenly distributed threaded holes on the inner wall of the groove. A raised mounting seat is fixedly connected to the center of the other side of the base. The mounting seat has a through hole that penetrates the base and is threaded for the installation of subsequent components.

[0007] The drive mechanism includes a lead screw and a handwheel. One end of the lead screw passes through a through hole on the base and engages with the thread inside the through hole. The other end of the lead screw is fixedly connected to the handwheel. A threadless section is provided in the middle of the lead screw. The length of the threadless section is equal to the thickness of the base, so that the lead screw can move axially without radial displacement when rotating.

[0008] The sealing module includes a flexible sealing ring and multiple arc-shaped pressure plates. The flexible sealing ring has an annular structure with an outer diameter slightly larger than that of the base. The inner side of the flexible sealing ring has multiple positioning holes corresponding to the annular groove of the base. The number of arc-shaped pressure plates is the same as the number of threaded holes in the annular groove of the base. One end of the arc-shaped pressure plate has a through hole, and the other end has an arc-shaped groove. The radius of curvature of the arc-shaped groove matches the outer diameter of the flexible sealing ring. The flexible sealing ring is fixed in the annular groove of the base by bolts passing through the through holes on the arc-shaped pressure plates and the threaded holes in the annular groove of the base.

[0009] The adjustment assembly includes multiple telescopic rods and adjusting nuts. One end of the telescopic rod is hinged to the outer edge of the base, and the other end is hinged to the inner side of the flexible sealing ring. The telescopic rod has an external thread in the middle, and the adjusting nut is fitted onto the external thread of the telescopic rod. The adjusting nut has a forward thread and a reverse thread on both sides. By rotating the adjusting nut, the length of the telescopic rod can be changed, thereby adjusting the contact pressure between the flexible sealing ring and the inner wall of the pipe.

[0010] Preferably, the flexible sealing ring is made of a high-molecular elastic material, and its surface is provided with multiple annular protrusions. The cross-sectional shape of the annular protrusions is trapezoidal. The top of the annular protrusions contacts the inner wall of the pipe, and multiple annular grooves are formed between the annular protrusions. The annular grooves are filled with grease to reduce friction and improve sealing performance.

[0011] Preferably, an anti-slip pad is provided in the arc-shaped groove of the arc-shaped pressure plate. The anti-slip pad is made of rubber and has multiple protrusions on its surface. The height of the protrusions is 0.5mm to 1mm and the spacing between the protrusions is 2mm to 3mm, so as to increase the friction between the arc-shaped pressure plate and the flexible sealing ring and prevent the flexible sealing ring from shifting under high pressure.

[0012] Preferably, both ends of the telescopic rod are provided with spherical hinges. The ball head of the spherical hinge engages with the hinge hole of the base and the flexible sealing ring. The ball seat of the spherical hinge is fixed to the end of the telescopic rod by screws. The gap between the ball head and the ball seat of the spherical hinge is filled with grease to ensure that the telescopic rod can rotate flexibly during adjustment.

[0013] Preferably, the outer edge of the base is provided with a plurality of positioning pins, the number of positioning pins being the same as the number of telescopic rods. The length of the positioning pin is 10mm to 15mm, and the end of the positioning pin is provided with a tapered tip with an angle of 30° to 45°, so as to facilitate the insertion of the positioning pin into the gap of the inner wall of the pipe, thereby improving the stability of the base in the pipe.

[0014] Preferably, the outer side of the handwheel is provided with anti-slip texture, the depth of the anti-slip texture is 1mm to 2mm, the spacing between the anti-slip textures is 3mm to 5mm, and an indicator arrow is provided in the center of the handwheel, the direction of the indicator arrow being parallel to the axis of the lead screw, so as to facilitate the operator to judge the movement direction of the lead screw.

[0015] Preferably, a layer of metal mesh is provided in the annular groove of the base. The metal mesh is made of stainless steel, with a mesh diameter of 1 mm to 2 mm and a thickness of 0.5 mm to 1 mm. The metal mesh is fixed to the bottom of the annular groove with adhesive to enhance the pressure resistance of the flexible sealing ring.

[0016] The working principle of the municipal water supply pipeline plugging device provided by this utility model is as follows:

[0017] Rotating the handwheel drives the lead screw to move axially, pushing the base deeper into the pipe. The positioning pin on the outer edge of the base inserts into the gap in the inner wall of the pipe, improving the stability of the base. Subsequently, rotating the adjusting nut changes the length of the telescopic rod, allowing the flexible sealing ring to fit tightly against the inner wall of the pipe. The annular protrusions on the surface of the flexible sealing ring further enhance the sealing effect. The arc-shaped pressure plate fixes the flexible sealing ring in the annular groove of the base with bolts, while the anti-slip pad and metal mesh further improve the pressure resistance and deformation resistance of the flexible sealing ring.

[0018] The technical effects of this utility model are mainly reflected in the following aspects:

[0019] First, the tight fit between the flexible sealing ring and the inner wall of the pipe solves the problem of poor sealing caused by aging of the seal or improper installation of the existing pipe plugging device. The annular protrusions on the surface of the flexible sealing ring and the annular groove filled with grease not only improve the sealing performance but also reduce frictional resistance and extend the service life of the seal.

[0020] Secondly, the cooperation of the telescopic rod and the adjusting nut enables precise adjustment of the contact pressure between the flexible sealing ring and the inner wall of the pipe, adapting to the pipe sealing requirements under different diameters and pressure conditions; the spherical hinge design at both ends of the telescopic rod ensures flexibility and stability during the adjustment process.

[0021] Furthermore, the positioning pins on the outer edge of the base and the arc-shaped pressure plate on the inner side of the flexible sealing ring together form a double fixing structure, which effectively prevents the displacement of the flexible sealing ring under high pressure and improves the reliability of the sealing.

[0022] Finally, the anti-slip texture and indicator arrow design of the handwheel simplifies the operation steps, reduces on-site construction time costs, and improves work efficiency.

[0023] In summary, this utility model, through the ingenious cooperation between its components, not only solves the problems of poor sealing and complex operation in existing pipe plugging devices, but also significantly improves the reliability of plugging and the convenience of operation, thus possessing high practical value and promotional significance. Attached Figure Description

[0024] Figure 1 This is a cross-sectional view of the overall structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the installation of the base in this utility model.

[0026] The attached diagram is labeled as follows: 1. Base; 2. Lead screw; 3. Handwheel; 4. Flexible sealing ring; 5. Arc-shaped pressure plate; 6. Telescopic rod; 7. Adjusting nut; 8. Positioning pin; 9. Annular protrusion; 10. Anti-slip pad. Detailed Implementation

[0027] This utility model provides a pipe plugging device for municipal water supply pipelines, whose structural design and the connection relationship between components are described through... Figures 1 to 2 A detailed demonstration was provided. The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. In the drawings, 1 represents the base, 2 represents the lead screw, 3 represents the handwheel, 4 represents the flexible sealing ring, 5 represents the arc-shaped pressure plate, 6 represents the telescopic rod, 7 represents the adjusting nut, 8 represents the positioning pin, 9 represents the annular protrusion, and 10 represents the anti-slip pad.

[0028] The base 1 is a disc-shaped structure, with its outer diameter matching the inner diameter of the pipe to be sealed. One side of the base 1 has an annular groove, and the inner wall of the groove has multiple evenly distributed threaded holes. These threaded holes are used for the fixed installation of the arc-shaped pressure plate 5. A raised mounting seat is located at the center of the other side of the base 1. The mounting seat has a through hole penetrating the base 1, and the through hole is threaded to accommodate the screw rod 2. One end of the screw rod 2 passes through the through hole on the base 1 and engages with the threaded part within the through hole. The other end of the screw rod 2 is fixedly connected to the handwheel 3. A section without threads is located in the middle of the screw rod 2, the length of which is equal to the thickness of the base 1, allowing the screw rod 2 to move axially without radial displacement during rotation. The outer side of the handwheel 3 has anti-slip grooves with a depth of 1mm to 2mm and a spacing of 3mm to 5mm between the grooves. An indicator arrow is located at the center of the handwheel 3, with the direction of the arrow parallel to the axis of the screw rod 2.

[0029] The flexible sealing ring 4 has an annular structure with an outer diameter slightly larger than that of the base 1. Multiple positioning holes corresponding to the annular grooves of the base 1 are provided on the inner side of the flexible sealing ring 4. The flexible sealing ring 4 is made of a high-polymer elastic material, and its surface has multiple annular protrusions 9. The cross-sectional shape of the annular protrusions 9 is trapezoidal, with their tops contacting the inner wall of the pipe. Multiple annular grooves are formed between the annular protrusions 9, and these grooves are filled with grease. The flexible sealing ring 4 is fixed to the annular groove of the base 1 by arc-shaped pressure plates 5. The number of arc-shaped pressure plates 5 is the same as the number of threaded holes in the annular groove of the base 1. One end of the arc-shaped pressure plate 5 has a through hole, and the other end has an arc-shaped groove. The radius of curvature of the arc-shaped groove matches the outer diameter of the flexible sealing ring 4. An anti-slip pad 10 is provided inside the arc-shaped groove of the arc-shaped pressure plate 5. The anti-slip pad 10 is made of rubber, and its surface has multiple raised dots with a height of 0.5mm to 1mm and a spacing of 2mm to 3mm between them. The arc-shaped pressure plate 5 is fixed in the annular groove of the base 1 by bolts passing through the through holes on the arc-shaped pressure plate 5 and the threaded holes in the annular groove of the base 1.

[0030] One end of the telescopic rod 6 is hinged to the outer edge of the base 1, and the other end is hinged to the inner side of the flexible sealing ring 4. Both ends of the telescopic rod 6 are equipped with spherical hinges. The ball heads of the spherical hinges engage with the hinge holes of the base 1 and the flexible sealing ring 4. The ball seats of the spherical hinges are fixed to the ends of the telescopic rod 6 with screws. The gap between the ball heads and ball seats of the spherical hinges is filled with grease. An external thread is provided in the middle of the telescopic rod 6. An adjusting nut 7 is fitted onto the external thread of the telescopic rod 6. The adjusting nut 7 has a forward thread and a reverse thread on its two sides. By rotating the adjusting nut 7, the length of the telescopic rod 6 can be changed, thereby adjusting the contact pressure between the flexible sealing ring 4 and the inner wall of the pipe.

[0031] The outer edge of the base 1 is provided with multiple positioning pins 8, the number of which is the same as the number of telescopic rods 6. The length of the positioning pins 8 is 10mm to 15mm, and the end of the positioning pin 8 is provided with a tapered tip with an angle of 30° to 45°. A layer of metal mesh is provided in the annular groove of the base 1. The metal mesh is made of stainless steel, the mesh opening diameter is 1mm to 2mm, and the thickness of the metal mesh is 0.5mm to 1mm. The metal mesh is fixed to the bottom of the annular groove with adhesive.

[0032] The working process of this utility model is as follows: First, the operator places the base 1 inside the pipe to be sealed, ensuring that the outer diameter of the base 1 matches the inner diameter of the pipe. Then, the operator rotates the handwheel 3, which drives the lead screw 2 to move axially, pushing the base 1 deeper into the pipe. During this process, the positioning pin 8 on the outer edge of the base 1 inserts into the gap in the inner wall of the pipe, improving the stability of the base 1 inside the pipe. Next, the operator rotates the adjusting nut 7, whose forward and reverse threads act on the external thread of the telescopic rod 6, changing the length of the telescopic rod 6. By adjusting the length of the telescopic rod 6, the contact pressure between the flexible sealing ring 4 and the inner wall of the pipe is adjusted, ultimately achieving a tight fit between the flexible sealing ring 4 and the inner wall of the pipe. The annular protrusion 9 on the surface of the flexible sealing ring 4 further enhances the sealing effect, and the grease in the annular groove reduces frictional resistance. The arc-shaped pressure plate 5 fixes the flexible sealing ring 4 in the annular groove of the base 1 with bolts, while the anti-slip pad 10 and metal mesh further improve the pressure resistance and deformation resistance of the flexible sealing ring 4.

[0033] The above embodiments illustrate specific implementations of this utility model, in which the positional relationships, connection relationships, and mutual cooperation relationships of each component are described in detail. The base 1, as the basic component of the overall device, cooperates with the inner wall of the pipe through the positioning pin 8 on its outer edge, ensuring the stability of the device. The flexible sealing ring 4 is fixed in the annular groove of the base 1 by the arc-shaped pressure plate 5, and the contact pressure with the inner wall of the pipe is precisely adjusted through the telescopic rod 6 and the adjusting nut 7. The cooperation of the handwheel 3 and the lead screw 2 enables the axial movement of the base 1. The design of the entire device fully considers the requirements of ease of operation and sealing performance.

[0034] To enable those skilled in the art to fully understand and implement this utility model, the specific implementation principles of this utility model are further explained below in conjunction with specific application scenarios.

[0035] During municipal water supply pipeline maintenance, operators need to temporarily seal a section of pipe with a diameter of 600mm and an internal water pressure of approximately 0.3MPa. In this case, the pipe sealing device provided by this invention can be operated and run according to the following steps.

[0036] First, place base 1 inside the pipe to be sealed, ensuring that the outer diameter of base 1 matches the inner diameter of the pipe. The disc-shaped structure of base 1 allows it to sit stably on the inner wall of the pipe, while multiple locating pins 8 on the outer edge of base 1 further enhance its stability. By rotating handwheel 3, handwheel 3 drives screw 2 to move axially, and screw 2 pushes base 1 gradually deeper into the pipe. During this process, the conical tips of the locating pins 8 insert into the gaps in the inner wall of the pipe, thereby preventing base 1 from sliding or shifting. This design principle utilizes the geometry and material hardness of the locating pins 8, allowing them to embed into the inner wall of the pipe with relatively small forces, while avoiding damage to the inner wall of the pipe.

[0037] Next, the operator begins adjusting the contact pressure between the flexible sealing ring 4 and the inner wall of the pipe. By rotating the adjusting nut 7, the forward and reverse threads of the adjusting nut 7 act on the external thread of the telescopic rod 6, causing the length of the telescopic rod 6 to change. The spherical hinge design at both ends of the telescopic rod 6 allows it to rotate flexibly during adjustment while ensuring uniform force transmission. As the length of the telescopic rod 6 increases, the flexible sealing ring 4 gradually expands outward and contacts the inner wall of the pipe. The annular protrusion 9 on the surface of the flexible sealing ring 4 generates a local high-pressure area when in contact with the inner wall of the pipe. This trapezoidal cross-section design allows the annular protrusion 9 to fit more tightly against the inner wall of the pipe, thereby enhancing the sealing effect. In addition, the grease in the annular groove reduces the frictional resistance between the flexible sealing ring 4 and the inner wall of the pipe, reducing the difficulty of operation and extending the service life of the seal.

[0038] After the flexible sealing ring 4 is tightly fitted to the inner wall of the pipe, the arc-shaped pressure plate 5 fixes the flexible sealing ring 4 in the annular groove of the base 1 with bolts. An anti-slip pad 10 is provided in the arc-shaped groove of the arc-shaped pressure plate 5. The raised points on the surface of the anti-slip pad 10 increase the friction between the arc-shaped pressure plate 5 and the flexible sealing ring 4, preventing displacement of the flexible sealing ring 4 under high pressure. Simultaneously, the metal mesh provided in the annular groove of the base 1 further improves the pressure resistance of the flexible sealing ring 4, enabling it to maintain stable sealing performance under high pressure conditions.

[0039] Finally, after completing the above operations, the operator can confirm the direction of movement of the lead screw 2 through the indicator arrow on the handwheel 3, and adjust the position of the base 1 according to actual needs. The anti-slip texture design on the outside of the handwheel 3 facilitates the operator in applying rotational force, while the indicator arrow helps the operator quickly determine the movement status of the base 1. Through this series of steps, this utility model achieves effective sealing of the pipeline, ensuring the safety and effectiveness of construction or maintenance.

[0040] The above steps demonstrate the specific operation process of this utility model in practical application, where the cooperation and function of each component are fully demonstrated. The base 1, as the basic component of the overall device, ensures the stability of the device through the cooperation of the positioning pin 8 with the inner wall of the pipe; the flexible sealing ring 4 is fixed in the annular groove of the base 1 by the arc-shaped pressure plate 5, and the contact pressure with the inner wall of the pipe is precisely adjusted by the telescopic rod 6 and the adjusting nut 7; the cooperation of the handwheel 3 and the lead screw 2 enables the axial movement of the base 1. The design of the entire device fully considers the requirements of ease of operation and sealing performance, and is suitable for sealing operations of municipal water supply pipelines under different diameters and pressure conditions.

[0041] All content not described in detail in this specification is prior art known to those skilled in the art, and the model parameters of each component are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are prior art and are therefore not shown in the figures, nor will they be described further here.

[0042] 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, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0043] 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 municipal water supply pipeline plugging device, comprising a base (1), characterized in that, Also includes: The drive mechanism includes a lead screw (2) and a handwheel (3). One end of the lead screw (2) passes through a through hole on the base (1) and engages with the thread inside the through hole. The other end of the lead screw (2) is fixedly connected to the handwheel (3). The sealing module includes a flexible sealing ring (4) and an arc-shaped pressure plate (5). The flexible sealing ring (4) is an annular structure with multiple positioning holes on its inner side. The number of arc-shaped pressure plates (5) is the same as the number of threaded holes in the annular groove of the base (1). The flexible sealing ring (4) is fixed in the annular groove of the base (1) by bolts passing through the through holes on the arc-shaped pressure plate (5) and the threaded holes in the annular groove of the base (1). The adjustment assembly includes a telescopic rod (6) and an adjusting nut (7). One end of the telescopic rod (6) is hinged to the outer edge of the base (1), and the other end is hinged to the inner side of the flexible sealing ring (4). The telescopic rod (6) has an external thread in the middle. The adjusting nut (7) is sleeved on the external thread of the telescopic rod (6). The adjusting nut (7) has a forward thread and a reverse thread on both sides.

2. A municipal water supply pipeline plugging device according to claim 1, characterized in that, The flexible sealing ring (4) is made of a high-polymer elastic material. Multiple annular protrusions (9) are provided on its surface. The cross-sectional shape of the annular protrusions (9) is trapezoidal. Multiple annular grooves are formed between the annular protrusions (9). The annular grooves are filled with grease.

3. A municipal water supply pipeline plugging device according to claim 1, characterized in that, An anti-slip pad (10) is provided in the arc-shaped groove of the arc-shaped pressure plate (5). The anti-slip pad (10) is made of rubber. The surface of the anti-slip pad (10) is provided with multiple protrusions. The height of the protrusions is 0.5 mm to 1 mm, and the distance between the protrusions is 2 mm to 3 mm.

4. A municipal water supply pipeline plugging device according to claim 1, characterized in that, Both ends of the telescopic rod (6) are provided with spherical hinges. The ball head of the spherical hinge is engaged with the hinge hole of the base (1) and the flexible sealing ring (4). The ball seat of the spherical hinge is fixed to the end of the telescopic rod (6) by screws. The gap between the ball head and the ball seat of the spherical hinge is filled with grease.

5. A municipal water supply pipeline plugging device according to claim 1, characterized in that, The outer edge of the base (1) is provided with multiple positioning pins (8). The number of positioning pins (8) is the same as the number of telescopic rods (6). The length of the positioning pins (8) is 10 mm to 15 mm. The end of the positioning pins (8) is provided with a conical tip with an angle of 30 degrees to 45 degrees.

6. A municipal water supply pipeline plugging device according to claim 1, characterized in that, The outer side of the handwheel (3) is provided with anti-slip texture. The depth of the anti-slip texture is 1 mm to 2 mm, and the spacing between the anti-slip textures is 3 mm to 5 mm. An indicator arrow is provided in the center of the handwheel (3), and the direction of the indicator arrow is parallel to the axis of the lead screw (2).

7. A municipal water supply pipeline plugging device according to claim 1, characterized in that, A layer of metal mesh is provided in the annular groove of the base (1). The metal mesh is made of stainless steel, the mesh hole diameter is 1 mm to 2 mm, and the thickness of the metal mesh is 0.5 mm to 1 mm. The metal mesh is fixed to the bottom of the annular groove by adhesive.

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