Municipal water supply and drainage pipeline connecting structure

Abstract

A municipal water supply and drainage pipeline connecting structure comprises an outer pipe and an inner pipe, the outer pipe is arranged at the two ends of the inner pipe in a sleeving mode and connected with a water supply and drainage pipe, sealing rings are arranged at the two ends of the inner pipe in the circumferential direction, the diameter of the sealing rings is matched with that of the water supply and drainage pipe, annular grooves are formed in the side walls of the two ends of the inner pipe in the circumferential direction, and the sealing rings are movably embedded in the annular grooves. A first cavity is formed in the pipe wall of the inner pipe in the axial direction, a pressure rod and an elastic piece are arranged in the first cavity, and an observation hole leading to the first cavity is formed in the inner pipe. According to the utility model, the elastic piece which displaces according to the stress of the sealing ring is arranged behind the sealing ring, and the fluorescent coatings with different colors are arranged on the surface of the elastic piece corresponding to different displacement distances, so that related personnel can judge the stress condition of the sealing ring only by observing the color of the elastic piece through the observation hole; the sealing effect is prevented from being affected by too large or too small fastening force, and later maintenance and overhaul are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of municipal water supply and drainage pipe connection, and more specifically, particularly to a municipal water supply and drainage pipe connection structure. Background Art

[0002] The existing municipal water supply and drainage pipe connection structure mainly adopts flange connection, that is, by welding a flange at the water pipe connection end, then setting a sealing gasket in the middle of the two flanges, and pressing and fixing the two flanges with bolts, so that the flange clamps the sealing gasket to ensure the sealing effect. Such a design not only takes a long time to configure the pipe belt, but also has high skill requirements for the construction workers. When the fastening bolts are tightened too tight or too loose, the sealing gasket will be deformed and dislocated due to stress, which will affect the sealing effect and is inconvenient for inspection and maintenance.

[0003] Chinese utility model disclosure specification CN113431966B discloses a municipal water supply and drainage pipe connection structure, which is connected by setting an outer pipe, a middle inner pipe and a side inner pipe with an adjustable extension length. However, the force applied to the sealing gasket still depends on the experience of the construction personnel. When the tightening force is too small, the sealing effect between the side inner pipe and the water supply and drainage pipe is limited, and leakage is likely to occur. When the tightening force is too large, the connection mechanism is easily damaged, resulting in leakage. Utility Model Content

[0004] The utility model aims to overcome the problem that the sealing effect is affected by the difficulty in controlling the tightening force of the sealing ring, and to provide a technical solution that can intuitively check the tightening force of the sealing ring.

[0005] A municipal water supply and drainage pipeline connection structure, characterized in that it comprises an outer tube and an inner tube for passing fluid, the outer tube is sleeved on both ends of the inner tube and connected to the water supply and drainage pipe, sealing rings are circumferentially provided at both ends of the inner tube, the diameter of the sealing ring matches the diameter of the water supply and drainage pipe, annular grooves are circumferentially provided on the side walls at both ends of the inner tube, the sealing ring is movably embedded in the annular groove, a first cavity is axially provided on the wall of the inner tube, a pressure rod and an elastic member are provided inside the first cavity, the two ends of the pressure rod are fixedly connected to the elastic member and the sealing ring respectively, the surface of the pressure rod is axially coated with paint layers of different colors, and the inner tube is provided with an observation hole leading to the first cavity and used to observe the color of the pressure rod.

[0006] Furthermore, the inner wall of the outer end of the outer tube is provided with an internal thread, the outer wall on the opposite side of the water pipe is provided with an external thread, and the outer tube and the water pipe are connected by threads.

[0007] Furthermore, the inner wall of the outer end of the outer tube is provided with an internal thread, the outer wall on the opposite side of the water supply and drainage pipe is provided with an external thread, and the outer tube and the water supply and drainage pipe are rotatably connected through the thread.

[0008] Furthermore, a first annular protrusion is circumferentially provided on the inner wall of the outer tube near one end of the inner tube, and a second annular protrusion is circumferentially provided on the outer walls at both ends of the inner tube, and the outer tube and the inner tube are movably connected via the first annular protrusion and the second annular protrusion.

[0009] Furthermore, the outer tube is fixedly connected to the inner tube.

[0010] Furthermore, the elastic member is a spring.

[0011] Furthermore, the coating is a fluorescent layer using fluorescent coating.

[0012] Furthermore, a transparent dust cover is provided on the outside of the observation hole.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The municipal water supply and drainage pipe connection method of the utility model limits the position of the sealing ring by providing annular grooves at the edges of both ends of the inner pipe, and provides a first cavity for arranging a spring and a pressure rod inside the annular groove, and an observation hole arranged radially, the observation hole is located outside the first cavity and connects the first cavity and the outside of the inner pipe. The pressure rod slightly extends out of the first cavity to the annular groove and is fixedly connected to the sealing ring. When the outer pipe and the water supply and drainage pipe are fixed by rotation, the wall of the water supply and drainage pipe slides radially inward due to the pressure of the outer pipe, pushing the pressure rod to move inward, causing the extrusion spring to deform, and the surface of the pressure rod is coated with paint layers of different colors along the axial direction, so that the staff can observe the color change of the pressure rod through the observation hole to judge whether the tightening force of the outer pipe and the water supply and drainage pipe is appropriate, effectively avoiding the loose fit between the water supply and drainage pipe and the sealing ring due to insufficient tightening force or the sealing ring being squeezed, deformed and dislocated due to excessive tightening force, ensuring the sealing effect. During inspection and maintenance, relevant personnel only observe the color of the pressure rod through the observation hole to judge the current sealing condition of the sealing ring, and no longer need to use a flashlight to carefully check for leakage, effectively improving the efficiency of inspection and leak detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 It is a front view of a municipal water supply and drainage pipe to a connection structure in the utility model.

[0017] Figure 2 yes Figure 1 Middle AA section view.

[0018] Figure 3 yes Figure 2 Schematic diagram of the structure at B in the figure.

[0019] Figure 4 yes Figure 2 Structural diagram of the working state at B.

[0020] Figure 5 yes Figure 2 Schematic diagram of the structure at C in the middle.

[0021] In the figure: 1. outer tube; 2. inner tube; 3. water supply and drainage pipe; 4. sealing ring; 5. annular groove; 6. first cavity; 7. pressure rod; 8. spring; 9. observation hole; 11. first annular protrusion; 12. second annular protrusion. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] A municipal water supply and drainage pipe connection structure, see Figures 1 to 5 , including an inner tube 2 for passing fluid and an outer tube 1 for connecting the inner tube 2 and the water supply and drainage pipe 3, two groups of outer tubes 1 are respectively arranged at both ends of the inner tube 2, the outer tube 1 is movably connected with the inner tube 2, and the diameter of the outer tube 1 is slightly larger than that of the inner tube 2. The inner walls of the two ends of the outer tube 1 are provided with internal threads, the outer walls of the two groups of water supply and drainage pipes 3 on the opposite sides are provided with external threads, and the inner walls of the two ends of the outer tube 1 are connected with the external threads of the water supply and drainage pipes 3 through the internal threads, and the outer tube 1 is fixed to the water supply and drainage pipes 3 at both ends by rotating the threads. The outer walls of the two ends of the inner tube 2 are provided with second annular protrusions 12 along the circumferential direction. When the inner tube 2 is connected with the outer tube 1, the inner tube 2 is inserted into the end of the outer tube 1 away from the water supply and drainage pipe 3, and after the inner tube 2 is inserted, the first annular protrusion 11 is welded on the inner wall edge of the end of the outer tube 1 away from the water supply and drainage pipe 3, so that the first annular protrusion 11 and the second annular protrusion 12 cooperate with each other to prevent the outer tube from detaching, and the outer tube can rotate around the inner tube to facilitate installation by the staff. The inner pipe 2 and the outer pipe 1 may also be fixedly connected. The fixed connection requires rotating the entire water supply and drainage pipe 3 to complete the fixation, thereby enhancing the ability of the connection device to resist environmental vibrations and ensuring the reliability of the connection.

[0024] In this embodiment, the second annular protrusions 12 at both ends of the inner tube 2 are provided with annular grooves 5 for arranging the sealing ring 4 in the axial direction inwardly, and the sealing ring 4 is arranged inside the annular grooves 5. When the outer tube 1 and the water supply and drainage pipe 3 are connected by rotation and fixation, the water supply and drainage pipe 3 is subjected to the radial inward pressure given by the outer tube 1, so that the pipe wall of the water supply and drainage pipe 3 is tightly attached to the sealing ring 4 to prevent leakage and complete the sealing.

[0025] In this embodiment, the inner wall of the annular groove 5 is also provided with a first cavity 6 for setting an elastic member, and the elastic member includes a pressure rod 7 and a spring 8. One end of the spring 8 is fixedly connected to the inner wall of the first cavity 6, and the other end is fixedly connected to the pressure rod 7. The other end of the pressure rod 7 passes through the first cavity 6 and extends into the annular groove 5, and is fixedly connected to the sealing ring 4. When the outer tube 1 is fixedly connected to the water supply and drainage pipe 3 by rotation, the water supply and drainage pipe 3 presses the sealing ring 4, and the sealing ring 4 moves inward to push the pressure rod 7, and the pressure rod 7 squeezes the spring 8, so that the spring 8 is deformed. The top of the first cavity 6 is also provided with an observation hole 9 along the diameter of the inner tube 2. The observation hole 9 is connected to the outside world. The observation hole 9 is used to help the staff observe the displacement distance of the pressure rod 7 or the degree of deformation of the spring 8 to determine whether the tightening force is appropriate.

[0026] For greater intuitiveness and convenience, the pressure rod 7 can also be coated with fluorescent paint at different positions on the surface to correspond to the degree of deformation of the spring 8, so that relevant personnel only need to check the color of the pressure rod 7 through the observation hole 9 to be able to intuitively and clearly determine the sealing condition of the sealing ring 4 at the current connection point, so as to avoid the situation where the water supply and drainage pipe 3 and the sealing ring 4 are not firmly fitted due to insufficient tightening force or the sealing ring 4 is squeezed, deformed and misaligned due to excessive tightening force, thereby ensuring the sealing effect. It is also more convenient for later staff to conduct inspection and maintenance. They only need to check the color of the pressure rod 7 through the observation hole 9 to determine the sealing condition of the sealing ring 4 at the current connection point. There is no need to use a flashlight to carefully check whether there is leakage or moisture at the edge of the connection point, which greatly improves the efficiency of inspection and leak detection.

[0027] The municipal water supply and drainage pipe connection method of the utility model limits the position of the sealing ring 4 by providing annular grooves 5 at the edges of both ends of the inner pipe 2, and a first cavity 6 for arranging a spring 8 and a pressure rod 7 is provided inside the annular groove 5, and an observation hole 9 is provided along the radial direction, the observation hole 9 is located outside the first cavity 6 and connects the first cavity 6 and the outside of the inner pipe 2, and the pressure rod 7 slightly extends out of the first cavity 6 to the annular groove 5, when the outer pipe 1 and the water supply and drainage pipe 3 are fixed by rotation, the pipe wall of the water supply and drainage pipe 3 slides radially inward by the pressure of the outer pipe 1, pushing the pressure rod 7 inward The lateral displacement causes the extrusion spring 8 to deform, and the surface of the pressure rod is coated with paint layers of different colors along the axial direction, so that the staff can observe the color change of the pressure rod 7 through the observation hole 9 to judge whether the tightening strength of the outer tube 1 and the water supply and drainage pipe 3 is appropriate, which effectively avoids the loose fit between the water supply and drainage pipe 3 and the sealing ring 4 due to insufficient tightening force or the sealing ring 4 is squeezed, deformed and misplaced due to excessive tightening force, thereby ensuring the sealing effect and facilitating maintenance and repair by relevant personnel. There is no need to use a flashlight to carefully check the leakage of the connection point, which greatly improves the maintenance efficiency.

[0028] Preferably, a transparent dust cover is provided on the upper portion of the observation hole 9 to prevent sewage or dust from entering the first cavity 6 and the observation hole 9, thereby affecting the deformation effect of the spring 8 and improving the service life of the connecting mechanism.

[0029] When using the utility model, first extend one end of the water supply and drainage pipe 3 into the outer pipe 1, adjust the observation hole 9 to a suitable position for easy observation, and then rotate the outer pipe 1 so that the inner wall of the water supply and drainage pipe 3 is squeezed inward by the pressure given by the outer pipe 1, and the pressure rod 7 is pushed to squeeze the spring 8 to produce displacement, and the outer pipe 1 is rotated until the color observed from the observation hole 9 changes and stops to confirm the tightening force. The same is true for the other end of the connecting device. The water supply and drainage pipe 3 is extended into the outer pipe 1, and the outer pipe 1 is rotated until the color change is observed from the observation hole 9 and the tightening force is confirmed to be normal. During maintenance, the staff only needs to check whether the color is normal through the observation hole 9 to determine the sealing condition of the sealing ring 4 at the current connection point, which effectively improves the maintenance efficiency.

[0030] The working principle of the municipal water supply and drainage pipe in this embodiment is: when the water supply and drainage pipe 3 is rotationally connected to the outer tube 1, the outer tube 1 pushes the water supply and drainage pipe 3 so that the water supply and drainage pipe 3 moves inward, squeezing the sealing ring 4. The sealing ring 4 is forced to push the pressure rod 7 in the first cavity 6 to generate a displacement compression spring 8. The pressure rod 7 is also coated with fluorescent paint of different colors corresponding to different displacement distances. Therefore, relevant personnel only need to check the color of the pressure rod 7 through the observation hole 9 to determine the sealing condition of the sealing ring 4 at the current connection point, thereby avoiding dislocation of the sealing ring 4 due to inappropriate tightening force, thereby improving installation and maintenance efficiency.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A municipal water supply and drainage pipe connection structure, characterized in that: The invention comprises an outer tube (1) and an inner tube (2) for passing fluid, wherein the outer tube (1) is sleeved on both ends of the inner tube (2) and connected to a water supply and drainage pipe (3), and sealing rings (4) are circumferentially arranged at both ends of the inner tube (2), and the diameter of the sealing ring (4) matches the diameter of the water supply and drainage pipe (3). The side walls at both ends of the inner tube (2) are circumferentially arranged with annular grooves (5), and the sealing ring (4) is movably embedded in the annular grooves (5). The wall of the inner tube (2) is axially provided with a first cavity (6), and a pressure rod (7) and an elastic member are arranged inside the first cavity (6). The two ends of the pressure rod (7) are respectively fixedly connected to the elastic member and the sealing ring (4), and the surface of the pressure rod (7) is axially coated with a coating layer of different colors, and the inner tube (2) is provided with an observation hole (9) leading to the first cavity (6) and used to observe the color of the pressure rod (7).

2. A municipal water supply and drainage pipe connection structure according to claim 1, characterized in that: The inner wall of the outer end of the outer tube (1) is provided with an internal thread, the outer wall of the connecting end of the water supply and drainage pipe (3) is provided with an external thread, and the outer tube (1) is threadedly connected to the water supply and drainage pipe (3).

3. A municipal water supply and drainage pipe connection structure according to claim 2, characterized in that: The outer tube (1) is provided with a first annular protrusion (11) along the circumferential direction on the inner wall of one end close to the inner tube (2), and the outer walls of both ends of the inner tube (2) are provided with second annular protrusions (12) along the circumferential direction, and the outer tube (1) is movably connected to the inner tube (2) via the first annular protrusion (11) and the second annular protrusion (12).

4. A municipal water supply and drainage pipe connection structure according to claim 2, characterized in that: The outer tube (1) is fixedly connected to the inner tube (2).

5. A municipal water supply and drainage pipe connection structure according to claim 3 or 4, characterized in that: The elastic member is a spring (8).

6. A municipal water supply and drainage pipe connection structure according to claim 5, characterized in that: The spring (8) is located on a side of the observation hole (9) away from the sealing ring (4).

7. A municipal water supply and drainage pipe connection structure according to claim 6, characterized in that: The coating layer adopts fluorescent coating.

8. A municipal water supply and drainage pipe connection structure according to claim 7, characterized in that: A transparent dust cover is provided outside the observation hole (9).

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