Anti-seepage connecting structure of municipal water supply and drainage pipeline

Abstract

The invention discloses an anti-seepage connecting structure of municipal water supply and drainage pipelines. The anti-seepage connecting structure comprises a first pipeline, a second pipeline and a connecting sealing mechanism. The first pipeline is connected with the second pipeline through the connecting sleeve, the connecting sleeve is provided with a mounting groove, a sealing ring gasket is arranged in the connecting sleeve, and the second pipeline is provided with a butt-joint groove. Meanwhile, the first sealing ring and the second sealing ring are further arranged between the pipeline and the flange plate, multiple sealing guarantees are formed, the risk of single sealing failure is effectively avoided, and the sealing reliability under the complex working condition is improved. Flange plate connection is adopted, operation is easy and convenient, professional welding equipment and personnel are not needed, the construction cost and difficulty are reduced, in addition, the structure is detachable and convenient to maintain, sealing parts are easy to replace, the structural stability is further guaranteed through the anti-loosening design, and the connecting structure is stable, resistant to deformation and capable of adapting to complex construction and use environments.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline connection, and more specifically, to a leak-proof connection structure for municipal water supply and drainage pipelines. Background Art

[0002] In the construction of municipal infrastructure, the water supply and drainage pipeline system is a crucial component. It is not only related to the daily water supply for urban residents but also undertakes the important tasks of urban sewage discharge and rainwater drainage. However, there are still many problems with the existing leak-proof connection structures for municipal water supply and drainage pipelines, which urgently need to be solved.

[0003] Existing common connection methods, such as socket rubber ring connection, although relatively simple to install, have uneven rubber ring quality and are prone to leakage due to aging, wear, or improper installation. During long-term use, affected by factors such as temperature changes and foundation settlement, the sealing performance of the rubber ring decreases, making it difficult to ensure the long-term stable operation of the water supply and drainage pipelines; welding connection can provide high connection strength and sealing performance for metal pipelines, but it has strict requirements for construction technology and environment. The need for professional welding personnel and equipment increases the construction cost, and in harsh construction environments, the welding quality is difficult to guarantee. Once defects occur, the repair is difficult and costly; hot melt connection is mostly used for plastic pipelines. Although the connection effect is good, it has extremely high requirements for the control of construction parameters. Slight deviations in heating temperature, time, and butt joint pressure may result in insecure connection and affect the leak-proof effect. At the same time, it has high requirements for the cleanliness and dryness of the construction environment, restricting its application in some complex environments; flange connection is convenient for disassembly and repair, but uneven bolt tightening is likely to cause sealing failure and cannot meet the requirements of municipal water supply and drainage projects with extremely high leak-proof requirements. Summary of the Invention

[0004] The purpose of the present invention is to provide a leak-proof connection structure for municipal water supply and drainage pipelines to solve the problems raised in the above background art.

[0005] The present invention adopts the following technical solutions:

[0006] A leak-proof connection structure for municipal water supply and drainage pipelines, comprising Pipe 1, Pipe 2, and a connection sealing mechanism, wherein:

[0007] One end of Pipe 1 is fixedly provided with a connected connection sleeve. The inner diameter of the connection sleeve is the same as the outer diameter of Pipe 1. An annular installation groove is formed on the inner wall of the connection sleeve, and an elastic sealing ring gasket is movably clamped inside the installation groove. One end of the connection sleeve facing away from Pipe 1 is fixedly provided with Flange 1;

[0008] The diameter of the second pipe is the same as that of the first pipe. A second flange is fixedly sleeved on the outer peripheral side of the second pipe. One end of the second pipe is movably inserted into the inside of the connecting sleeve. When one end of the second pipe contacts one end of the first pipe, the second flange and the first flange are opposite to each other, and the second flange and the first flange are detachably connected by a bolt member. A docking groove corresponding to the installation groove is formed on the outer peripheral side of the second pipe;

[0009] The connection and sealing mechanism is installed on the connecting sleeve. The connection and sealing mechanism is used to control the sealing gasket to move into the inside of the docking groove, so that the outer peripheral side of the sealing gasket is located inside the installation groove and the inner peripheral side of the sealing gasket is located inside the docking groove.

[0010] Further, a plurality of through grooves are formed through the first flange and the second flange, and the plurality of through grooves on the first flange and the second flange correspond to each other one by one. The number of bolt members is half of the number of through grooves. The bolt member includes a screw rod movably passing through two corresponding through grooves. A fastening head is fixed at one end of the screw rod, and a nut is threadedly sleeved on the screw rod.

[0011] Further, the connection and sealing mechanism includes a plurality of control rods and a driving member. The plurality of control rods are rotationally arranged in an array with the central axis of the first pipe as the center. A plurality of installation holes arranged in an array are formed through the connecting sleeve, and the plurality of installation holes correspond to the plurality of control rods one by one. The control rod movably passes through the corresponding installation hole. A plurality of connecting blocks arranged in an array are fixed on the outer peripheral side of the sealing gasket, and the plurality of connecting blocks correspond to the plurality of control rods one by one. One end of the control rod is fixed to the corresponding connecting block. The driving member is used to drive the plurality of control rods to move along their respective corresponding installation holes to achieve synchronous expansion or synchronous contraction.

[0012] Further, the driving member includes a plurality of rotating blocks rotatably installed on the outer peripheral side of the connecting sleeve. The number of rotating blocks is the same as and corresponds to the number of control rods one by one. The control rod is threadedly inserted into the corresponding rotating block. A first bevel gear is fixedly sleeved on the rotating block. A linkage rod is rotatably installed on the outer peripheral side of the connecting sleeve. A second bevel gear meshing with the first bevel gear is fixed at one end of the linkage rod. A first rolling gear is fixed at the other end of the linkage rod. A second rolling gear is rotatably installed on the outer peripheral side of the connecting sleeve. The plurality of first rolling gears are all meshed with the second rolling gear.

[0013] Further, a rotating handle is fixed at the end of one of the linkage rods.

[0014] Furthermore, a device plate is fixed on the outer peripheral side of the connecting sleeve. One of the linkage rods is rotatably installed on the device plate and is fixedly sleeved with a ratchet wheel. A pawl is rotatably installed on the device plate. One end of the pawl is movably inserted between two adjacent teeth of the ratchet wheel. When several control rods gather, the ratchet wheel can rotate. When several control rods expand, the ratchet wheel cannot rotate under the resistance of the pawl.

[0015] Furthermore, an annular slot one is formed at one end of the first pipe, and an annular slot two is formed at one end of the second pipe. A sealing ring one is movably clamped between the slot two and the slot one.

[0016] Furthermore, an annular slot three is formed at one end of the first flange, and a slot four is formed at one end of the second flange. An integrated sealing ring two is movably clamped between the slot four and the slot three.

[0017] Furthermore, the cross-sections of the fastening head and the nut are both regular hexagons.

[0018] Furthermore, a connecting plate is fixed on the device plate, and a spring is connected between the connecting plate and the pawl.

[0019] Beneficial effects

[0020] 1. In the present invention, multiple sealing structures are carefully arranged at the pipe connection to comprehensively strengthen the anti-seepage effect. At the pipe docking part, under the precise action of the connection sealing mechanism, the sealing ring gasket closely fits the installation groove and the docking groove to achieve a tight seal of the inside of the pipe. At the same time, the sealing ring one arranged between the end slots of the first pipe and the second pipe, and the sealing ring two equipped between the slots of the first flange and the second flange jointly build a multi-level sealing defense line. This multiple-sealing design fundamentally avoids the leakage risk caused by the failure of a single seal. Compared with the traditional socket rubber ring connection, in the face of complex factors such as temperature fluctuations and foundation settlement, the sealing reliability of this solution is significantly improved, and the sealing performance can be maintained for a long time, effectively ensuring the stable operation of the water supply and drainage pipes.

[0021] 2. In the present invention, the design of the connection sealing mechanism can accurately control the movement of the control rod by means of the driving part to realize the synchronous expansion or contraction of the sealing ring gasket. This active sealing adjustment mode can quickly and accurately adjust the position and fitting degree of the sealing ring gasket according to the actual working conditions and the real-time deformation of the pipe, further strengthening the sealing effect and effectively solving the problem that the sealing structure in the traditional connection method is difficult to adapt to the dynamic changes of the pipe.

[0022] 3. The present invention adopts a flange connection method, and the first flange and the second flange are detachably connected through bolt members. The operation process is relatively convenient. Compared with welding connection, it does not require professional welding personnel and complex welding equipment, significantly reducing the requirements for the professional skills of construction personnel and the construction environment, effectively reducing construction costs. At the same time, it also avoids the problem of poor welding quality caused by harsh construction environments.

[0023] In the present invention, the driving member of the connection sealing mechanism realizes the synchronous driving of the control rod through the coordinated cooperation of components such as a turning handle, a linkage rod, bevel gears, and rolling gears. Construction personnel only need to turn the turning handle to easily control the position of the sealing gasket. During the pipeline installation process, the installation and adjustment of the sealing gasket can be quickly and accurately completed, greatly reducing the construction difficulty and significantly improving the success rate and efficiency of construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a three-dimensional structure schematic diagram of the present invention;

[0025] Figure 2 is of the present invention Figure 1 three-dimensional sectional view;

[0026] Figure 3 is of the present invention Figure 2 enlarged view of structure A in;

[0027] Figure 4 is of the present invention Figure 2 enlarged view of structure B in;

[0028] Figure 5 is of the present invention Figure 2 enlarged view of structure C in;

[0029] Figure 6 is of the present invention Figure 1 three-dimensional structure schematic diagram of part of the structure in;

[0030] Figure 7 is of the present invention Figure 6 enlarged view of structure D in;

[0031] Figure 8 is a three-dimensional structure schematic diagram of another state of the present invention.

[0032] In the figure: 1. Pipe 1; 11. Connecting sleeve; 111. Mounting hole; 112. Device plate; 113. Ratchet; 114. Pawl; 115. Connecting plate; 116. Spring; 12. Mounting groove; 13. Sealing ring gasket; 131. Connecting block; 14. Flange 1; 141. Third card slot; 15. First card slot; 2. Pipe 2; 21. Flange 2; 211. Fourth card slot; 22. Bolt member; 221. Screw rod; 222. Fastening head; 223. Nut; 23. Docking groove; 24. Second card slot; 3. Connecting and sealing mechanism; 31. Control rod; 32. Driving member; 321. Rotating block; 322. First bevel gear; 323. Linking rod; 324. Second bevel gear; 325. First rolling gear; 326. Second rolling gear; 327. Rotating handle; 4. First sealing ring; 5. Second sealing ring. Detailed implementation mode

[0033] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0034] An anti-seepage connection structure for municipal water supply and drainage pipes provided by the present invention mainly solves the problems of existing common connection methods. For example, in socket rubber ring connection, although the installation is relatively simple, the quality of rubber rings varies greatly, and it is easy to cause leakage due to aging, wear or improper installation. During long-term use, affected by factors such as temperature changes and foundation settlement, the sealing performance of rubber rings decreases, making it difficult to ensure the long-term stable operation of water supply and drainage pipes; welding connection can provide high connection strength and sealing performance for metal pipes, but it has strict requirements for construction technology and environment. The need for professional welding personnel and equipment increases the construction cost, and in harsh construction environments, the welding quality is difficult to guarantee. Once defects occur, the repair is difficult and costly; hot melt connection is mostly used for plastic pipes. Although the connection effect is good, it has extremely high requirements for the control of construction parameters. Slight deviations in heating temperature, time and docking pressure may result in insecure connection and affect the anti-seepage effect. At the same time, it has high requirements for the cleanliness and dryness of the construction environment, restricting its application in some complex environments; flange connection is convenient for disassembly and repair, but uneven bolt tightening is likely to cause sealing failure and cannot meet the requirements of municipal water supply and drainage projects with extremely high anti-seepage requirements. The following technical solutions are provided and will be described in detail with reference to the accompanying drawings:

[0035] Embodiment 1:

[0036] An anti-seepage connection structure for municipal water supply and drainage pipes includes Pipe 1 (1), Pipe 2 (2) and a connecting and sealing mechanism (3), where:

[0037] One end of the first pipe 1 is fixed with a connected sleeve 11. The inner diameter of the sleeve 11 is the same as the outer diameter of the first pipe 1. An annular installation groove 12 is formed on the inner wall of the sleeve 11. An elastic sealing ring gasket 13 is movably clamped inside the installation groove 12. One end of the sleeve 11 facing away from the first pipe 1 is fixed with a first flange 14;

[0038] The diameter of the second pipe 2 is the same as that of the first pipe 1. A second flange 21 is fixedly sleeved on the outer peripheral side of the second pipe 2. One end of the second pipe 2 is movably inserted into the inside of the sleeve 11. When one end of the second pipe 2 contacts one end of the first pipe 1, the second flange 21 and the first flange 14 are opposed to each other. The second flange 21 and the first flange 14 are detachably connected by a bolt member 22. A docking groove 23 corresponding to the installation groove 12 is formed on the outer peripheral side of the second pipe 2;

[0039] The connection and sealing mechanism 3 is installed on the sleeve 11. The connection and sealing mechanism 3 is used to control the sealing ring gasket 13 to move into the inside of the docking groove 23 so that the outer peripheral side of the sealing ring gasket 13 is located inside the installation groove 12 and the inner peripheral side of the sealing ring gasket 13 is located inside the docking groove 23.

[0040] This design eliminates the need for professional welding equipment and technicians during the construction process, effectively reducing the technical threshold and equipment cost of construction. At the same time, the simple and clear operation process greatly improves the construction efficiency, reduces the possible mistakes and losses during the construction process. In addition, the connection structure has the characteristic of being detachable. When a fault occurs or maintenance is required during the later operation of the pipeline system, the pipelines can be separated conveniently and quickly, and the sealing components can be inspected, replaced or repaired, greatly reducing the maintenance cost and difficulty, and further ensuring the long-term stable operation of the entire water supply and drainage pipeline system.

[0041] After the first pipe 1 and the sleeve 11 are sleeved, they are fixed by welding and then sealed. The first pipe 1 and the sleeve 11 are pre-treated in advance.

[0042] Specifically, please refer to Figure 2 and Figure 8 , a number of through grooves are formed through the first flange 14 and the second flange 21. The number of through grooves on the first flange 14 and the second flange 21 corresponds one by one, providing an accurate positioning basis for subsequent connection operations. The number of bolt members 22 is half of the number of through grooves. The bolt member 22 includes a screw rod 221 that movably passes through two corresponding through grooves. One end of the screw rod 221 is fixed with a fastening head 222. A nut 223 is threadedly sleeved on the screw rod 221;

[0043] During operation, insert the screw rod 221 through the through groove of the first flange 14, and then pass it through the corresponding through groove on the second flange 21, ensuring that the screw rod 221 can pass through the two through grooves smoothly. Then, at the end where the screw rod 221 exits, make the fastening head 222 fit against one side of the first flange 14. This fastening head 222 is used to provide a reverse force to facilitate the subsequent tightening operation of the nut 223. Subsequently, thread the nut 223 onto the screw rod 221, and use a tool (such as a wrench) to rotate the nut 223 so that it moves along the thread of the screw rod 221 towards the fastening head 222. As the nut 223 is continuously tightened, the distance between it and the fastening head 222 gradually decreases, thereby generating a strong fastening force to tightly connect the first flange 14 and the second flange 21 together;

[0044] This connection method brings many beneficial effects. First, in terms of connection strength, through the tight cooperation of the screw rod 221 and the nut 223, sufficient fastening force can be generated to firmly combine the first flange 14 and the second flange 21, thereby ensuring that the pipeline connection has a high strength and can withstand various internal pressures and external loads generated during the operation of the water supply and drainage pipeline, guaranteeing the safe and stable operation of the pipeline system. Second, from the perspective of operation convenience, this bolt connection method is simple and easy to understand, and construction workers can operate it proficiently without complex skill training, greatly improving the construction efficiency. Moreover, due to its detachable characteristics, when the pipeline system needs to be repaired, inspected, or components replaced, simply loosen the nut 223, and the first flange 14 and the second flange 21 can be easily separated, providing great convenience for subsequent maintenance work and reducing the maintenance cost and difficulty.

[0045] In this embodiment, please refer to Figure 3 、 Figure 6 and Figure 8 . The connection and sealing mechanism 3 includes a plurality of control rods 31 and a driving member 32. The plurality of control rods 31 are distributed in a rotational array around the central axis of the first pipeline 1. A plurality of mounting holes 111 distributed in an array are formed through the connecting sleeve 11. The plurality of mounting holes 111 correspond to the plurality of control rods 31 one by one. The control rods 31 movably pass through the corresponding mounting holes 111. A plurality of connecting blocks 131 distributed in an array are fixed on the outer peripheral side of the sealing ring gasket 13. The plurality of connecting blocks 131 correspond to the plurality of control rods 31 one by one. One end of the control rod 31 is fixed to the corresponding connecting block 131. The driving member 32 is used to drive the plurality of control rods 31 to move along their respective corresponding mounting holes 111 to achieve synchronous expansion or synchronous contraction;

[0046] The design of this connection sealing mechanism 3 has significant beneficial effects. From the perspective of sealing performance, by synchronously expanding or contracting the control rod 31, the position and sealing state of the sealing ring gasket 13 can be precisely adjusted to ensure that the sealing ring gasket 13 can closely fit the installation groove 12 and the docking groove 23, greatly improving the reliability of sealing and effectively preventing leakage problems at the connection of the water supply and drainage pipes. In terms of operation convenience, the driving member 32 can achieve synchronous operation of multiple control rods 31, avoiding the cumbersome process of adjusting one by one. The construction personnel only need to operate the driving member 32 to easily complete the adjustment of the sealing ring gasket 13, improving the construction efficiency. Moreover, this structural design can flexibly adjust the state of the sealing ring gasket 13 according to the actual working conditions to adapt to different working environments and pipeline deformation conditions, further enhancing the adaptability and stability of the entire anti-seepage connection structure.

[0047] Further, the driving member 32 includes a number of rotating blocks 321 rotatably installed on the outer peripheral side of the connecting sleeve 11. The number of rotating blocks 321 is the same as and corresponds one-to-one with the number of control rods 31. The control rod 31 is threadedly inserted into the corresponding rotating block 321. A first bevel gear 322 is fixedly sleeved on the rotating block 321. A linkage rod 323 is rotatably installed on the outer peripheral side of the connecting sleeve 11. A second bevel gear 324 meshing with the first bevel gear 322 is fixed at one end of the linkage rod 323. A first rolling gear 325 is fixed at the other end of the linkage rod 323. A second rolling gear 326 is rotatably installed on the outer peripheral side of the connecting sleeve 11. A number of first rolling gears 325 are all meshed with the second rolling gear 326. A turning handle 327 is fixed at the end of one of the linkage rods 323;

[0048] During actual operation, the operator holds the turning handle 327 and rotates it. The rotation of the turning handle 327 drives the connected linkage rod 323 to rotate around its axis. The second bevel gear 324 at one end of the linkage rod 323 rotates accordingly. Since the second bevel gear 324 meshes with the first bevel gear 322 on the rotating block 321, the rotating block 321 is driven to rotate accordingly. Also, because the control rod 31 is threadedly inserted into the rotating block 321, the rotation of the rotating block 321 will drive the control rod 31 to move along the corresponding mounting hole 111 on the connecting sleeve 11. At the same time, the first rolling gear 325 at the other end of the linkage rod 323 rotates with the linkage rod 323. The meshing of the first rolling gear 325 and the second rolling gear 326 causes other linkage rods 323 to rotate synchronously, thereby driving all control rods 31 to achieve synchronous expansion or contraction;

[0049] This design of the driving member 32 has many remarkable beneficial effects. In terms of transmission efficiency, through the precise meshing transmission of multiple-stage gears, the force applied by the operator on the handle 327 can be efficiently transmitted to the control rod 31, achieving precise and stable control. From the perspective of operation convenience, the operator only needs to rotate a handle 327, and with the help of the gear transmission system, the synchronous movement of all control rods 31 can be easily achieved, greatly simplifying the operation process and improving the construction efficiency. Moreover, this structural design is compact and reasonable, occupying less space, yet can achieve complex synchronous control functions, enhancing the adaptability and reliability of the entire connection and sealing mechanism 3 in practical applications, ensuring that the position of the sealing ring gasket 13 can be stably and efficiently adjusted under different working conditions, and guaranteeing the sealing performance of the water supply and drainage pipe connection.

[0050] Furthermore, to prevent the accidental loosening of the control rod 31, please refer to Figure 7 , a device plate 112 is fixed on the outer peripheral side of the connecting sleeve 11. One of the linkage rods 323 is rotatably installed on the device plate 112 and is fixedly sleeved with a ratchet wheel 113. A pawl 114 is rotatably installed on the device plate 112. One end of the pawl 114 is movably inserted between two adjacent teeth of the ratchet wheel 113. When several control rods 31 are gathered, the ratchet wheel 113 can rotate. When several control rods 31 expand, the ratchet wheel 113 cannot rotate under the resistance of the pawl 114;

[0051] During the actual operation process, when the operator rotates the handle 327 to gather several control rods 31, the connected linkage rod 323 drives the ratchet wheel 113 to rotate. Since the pawl 114 does not obstruct the rotation of the ratchet wheel 113 at this time, the ratchet wheel 113 can rotate smoothly, thus ensuring that the control rod 31 can be smoothly gathered. When the control rod 31 completes the expansion action and reaches the position where the sealing ring gasket 13 is closely attached to the installation groove 12 and the docking groove 23, the ratchet wheel 113 rotates to a specific position along with the linkage rod 323. At this time, one end of the pawl 114 will be stuck between two adjacent teeth of the ratchet wheel 113. During subsequent use, once there is an external force attempting to reverse the rotation of the linkage rod 323, thereby driving the control rod 31 to loosen, the pawl 114 will resist on the teeth of the ratchet wheel 113, preventing the rotation of the ratchet wheel 113, so that the linkage rod 323 cannot rotate in the reverse direction, effectively preventing the accidental expansion and loosening of several control rods 31;

[0052] This ratchet 113-pawl 114 structural design can effectively prevent the accidental loosening of the control rod 31 caused by external vibrations, water flow impacts, etc., ensuring that the sealing ring gasket 13 always remains in the optimal sealing position, greatly enhancing the sealing stability at the pipe connection, reducing the leakage risk caused by sealing loosening. From the perspective of reliability, this structure provides a simple and effective way to lock the position of the control rod 31, and can maintain the sealing state reliably for a long time without an additional complex control system or frequent manual inspections, enhancing the reliability of the operation of the entire water supply and drainage pipe system, reducing maintenance costs and potential safety hazards.

[0053] To further improve the sealing performance of the pipe connection, please refer to Figure 4 , Figure 5 and Figure 8 , a circular clamping groove one 15 is constructed at one end of the pipe one 1, and a circular clamping groove two 24 is constructed at one end of the pipe two 2. A sealing ring one 4 is movably clamped between the clamping groove two 24 and the clamping groove one 15; a circular clamping groove three 141 is constructed at one end of the flange one 14, and a clamping groove four 211 is constructed at one end of the flange two 21. An integrated sealing ring two 5 is movably clamped between the clamping groove four 211 and the clamping groove three 141;

[0054] By respectively arranging the sealing ring one 4 and the sealing ring two 5 at the interfaces of the pipe one 1 and the pipe two 2 and at the interfaces of the flange one 14 and the flange two 21, a double-sealing structure is constructed, greatly enhancing the sealing performance of the pipe connection. Whether it is the pressure generated by the liquid flow inside the pipe or the pipe deformation that may be caused by external environmental factors (such as temperature changes, foundation settlement, etc.), these sealing rings can play a good sealing role, significantly reducing the possibility of liquid leakage from the pipe interface, ensuring the sealing and stability of the water supply and drainage pipe system. From the perspective of the reliability of the structure, the sealing ring one 4 and the sealing ring two 5, as additional sealing guarantees, can share the sealing pressure of the sealing ring gasket 13, avoiding the situation where the entire connection seal fails due to the failure of a single sealing structure, improving the reliability and durability of the entire anti-seepage connection structure, extending the service life of the water supply and drainage pipe system. At the same time, the design of this sealing ring is relatively simple, easy to install and maintain, does not increase too much construction difficulty and cost, but can significantly improve the sealing effect, further ensuring the normal operation of the water supply and drainage system.

[0055] Embodiment Two:

[0056] Embodiment Two is a further optimization of Embodiment One. Please refer to Figure 2 , and the cross-sections of the fastening head 222 and the nut 223 are both regular hexagons;

[0057] This regular hexagonal fastening head 222 and nut 223 enable the operator to operate conveniently and quickly using a standard hexagonal wrench tool (such as an ordinary wrench or socket wrench). Compared with fastening heads 222 and nuts 223 of other shapes, the regular hexagonal design is more in line with the usage habits of conventional tools, more comfortable to operate, and reduces the time waste and low construction efficiency caused by tool mismatch or inconvenient operation.

[0058] Embodiment Three:

[0059] Embodiment Three is a further optimization of Embodiment One. Please refer to Figure 7 , a connecting plate 115 is fixed on the device plate 112, and a spring 116 is connected between the connecting plate 115 and the pawl 114;

[0060] The elastic force continuously provided by the spring 116 ensures that the pawl 114 can always act tightly on the ratchet wheel 113, effectively preventing the control rod 31 from loosening due to factors such as accidental vibration and external force impact, and thus ensuring that the sealing ring gasket 13 always maintains the best sealing state, greatly reducing the risk of leakage at the connection of the water supply and drainage pipes.

[0061] When actually operating this anti-seepage connection structure of the municipal water supply and drainage pipes:

[0062] First, perform the docking installation of pipe one 1 and pipe two 2. Insert the end of pipe two 2 with flange two 21 into the connecting sleeve 11 of pipe one 1 until the end of pipe two 2 contacts the end of pipe one 1. At this time, flange two 21 and flange one 14 are opposite to each other;

[0063] Then, insert the screw 221 through the through groove of flange one 14 and through the corresponding through groove of flange two 21, make the fastening head 222 fit against one side of flange one 14, and then thread the nut 223 onto the screw 221. Rotate the nut 223 with a wrench to make it move towards the fastening head 222, thereby fastening flange one 14 and flange two 21;

[0064] Subsequently, operate the connection sealing mechanism 3 to adjust the sealing ring gasket 13. The operator holds the turning handle 327 and rotates it, driving the linkage rod 323 to rotate. The bevel gear two 324 at one end of the linkage rod 323 rotates and meshes with the bevel gear one 322 on the rotating block 321, causing the rotating block 321 to rotate, and then driving the control rod 31 threaded on the rotating block 321 to move along the installation hole 111 of the connecting sleeve 11. At the same time, the rolling gear one 325 at the other end of the linkage rod 323 rotates, driving other linkage rods 323 to rotate synchronously through meshing with the rolling gear two 326, realizing the synchronous expansion or contraction of all control rods 31 to adjust the sealing ring gasket 13 to a proper position;

[0065] When the control rod 31 is gathered, the ratchet wheel 113 can rotate smoothly under the drive of the linkage rod 323; when the control rod 31 is expanded in place and the sealing ring gasket 13 is closely attached to the installation groove 12 and the docking groove 23, the pawl 114 will catch between the adjacent teeth of the ratchet wheel 113 to prevent the reverse rotation of the linkage rod 323 from causing the control rod 31 to loosen.

[0066] The above are only the preferred specific embodiments of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An anti-seepage connection structure for municipal water supply and drainage pipes, characterized in that: It comprises a pipeline 1 (1), a pipeline 2 (2) and a connecting sealing mechanism (3), wherein: A connecting sleeve (11) is fixedly connected to one end of the pipe one (1), the inner diameter of the connecting sleeve (11) being the same as the outer diameter of the pipe one (1), an annular mounting groove (12) being constructed on the inner wall of the connecting sleeve (11), an elastic sealing ring gasket (13) being provided in a movable manner inside the mounting groove (12), and a flange plate (14) is fixedly connected to the end of the connecting sleeve (11) facing away from the pipe one (1); The diameter of the second pipe (2) is the same as that of the first pipe (1); a second flange (21) is fixedly sleeved on the outer peripheral side of the second pipe (2); one end of the second pipe (2) is movably inserted into the interior of the connecting sleeve (11); when one end of the second pipe (2) contacts one end of the first pipe (1), the second flange (21) is engaged with the first flange (14); the second flange (21) and the first flange (14) are detachably connected via bolts (22); and a docking groove (23) corresponding to the mounting groove (12) is constructed on the outer peripheral side of the second pipe (2); The connection sealing mechanism (3) is mounted on the connection sleeve (11), and is used to control the sealing ring gasket (13) to move toward the inside of the docking groove (23), so that the outer peripheral side of the sealing ring gasket (13) is located inside the installation groove (12) and the inner peripheral side of the sealing ring gasket (13) is located inside the docking groove (23).

2. The anti-seepage connection structure of a municipal water supply and drainage pipeline according to claim 1, characterized in that: The flange plate 1 (14) and the flange plate 2 (21) are both penetrated by a plurality of through grooves, and the flange plate 1 (14) corresponds to the plurality of through grooves on the flange plate 2 (21) one by one. The number of the bolt members (22) is half the number of the through grooves, and the bolt member (22) comprises a screw rod (221) movably penetrated by two corresponding through grooves, a fastening head (222) is fixed at one end of the screw rod (221), and a nut (223) is threadedly sleeved on the screw rod (221).

3. The anti-seepage connection structure of a municipal water supply and drainage pipeline according to claim 2, characterized in that: The connection sealing mechanism (3) comprises a plurality of control rods (31) and a driving member (32), wherein the plurality of control rods (31) are arranged in a rotation array about the central axis of the pipe (1), the connection sleeve (11) is penetrated with a plurality of mounting holes (111) arranged in an array, the plurality of mounting holes (111) correspond one-to-one to the plurality of control rods (31), the control rods (31) movably pass through the corresponding mounting holes (111), a plurality of connection blocks (131) arranged in an array are fixed on the outer peripheral side of the sealing ring gasket (13), the connection blocks (131) correspond one-to-one to the control rods (31), one end of the control rod (31) is fixed to the corresponding connection block (131), and the driving member (32) is used for driving the plurality of control rods (31) to move along the corresponding mounting holes (111) to achieve synchronous expansion or synchronous contraction.

4. The anti-seepage connection structure of a municipal water supply and drainage pipeline according to claim 3, characterized in that: The driving member (32) comprises a plurality of rotating blocks (321) rotatably mounted on the outer peripheral side of the connecting sleeve (11); the number of the rotating blocks (321) is the same as the number of the control rods (31) and corresponds to each other; the control rods (31) are threadedly inserted on the corresponding rotating blocks (321); a bevel gear 1 (322) is fixedly sleeved on the rotating blocks (321); a connecting rod (323) is rotatably mounted on the outer peripheral side of the connecting sleeve (11); a bevel gear 2 (324) meshing with the bevel gear 1 (322) is fixed to one end of the connecting rod (323); a roller gear 1 (325) is fixed to the other end of the connecting rod (323); a roller gear 2 (326) is rotatably mounted on the outer peripheral side of the connecting sleeve (11); a plurality of roller gears 1 (325) are meshed with the roller gear 2 (326).

5. The anti-seepage connection structure of a municipal water supply and drainage pipeline according to claim 4, characterized in that: A turning handle (327) is fixed to the end of one of the connecting rods (323).

6. The anti-seepage connection structure of a municipal water supply and drainage pipeline according to claim 4, characterized in that: A device plate (112) is fixed on the outer peripheral side of the connecting sleeve (11), one of the connecting rods (323) is rotatably mounted on the device plate (112) and the fixed sleeve is provided with a ratchet (113), a pawl (114) is rotatably mounted on the device plate (112), one end of the pawl (114) is movably inserted between two adjacent teeth on the ratchet (113), when a plurality of the control rods (31) are gathered together, the ratchet (113) can rotate, and when a plurality of the control rods (31) are expanded, the ratchet (113) cannot rotate due to the resistance of the pawl (114).

7. The anti-seepage connection structure of a municipal water supply and drainage pipeline according to claim 1, characterized in that: An annular clamping groove 1 (15) is formed on one end of the pipe 1 (1), and an annular clamping groove 2 (24) is formed on one end of the pipe 2 (2). A sealing ring 1 (4) is movably provided between the clamping groove 2 (24) and the clamping groove 1 (15).

8. The anti-seepage connection structure of a municipal water supply and drainage pipeline according to claim 1, characterized in that: An annular clamping groove three (141) is formed on one end of the flange plate one (14), and a clamping groove four (211) is formed on one end of the flange plate two (21), and an integral sealing ring two (5) is movably clamped between the clamping groove four (211) and the clamping groove three (141).

9. The anti-seepage connection structure of a municipal water supply and drainage pipeline according to claim 2, characterized in that: The cross-sections of the fastening head (222) and the nut (223) are both regular hexagons.

10. The anti-seepage connection structure of a municipal water supply and drainage pipeline according to claim 6, characterized in that: A connecting plate (115) is fixed on the device plate (112), and a spring (116) is connected between the connecting plate (115) and the ratchet (114).

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