Sealing structure at joint of cement socket pipe

Abstract

The utility model discloses a sealing structure at a cement socket pipe joint. The sealing structure solves the problem of how to improve the sealing performance of a socket joint and avoid the water seepage phenomenon. An annular rubber gasket (6) is connected to the cement pipe inserting opening end (5) in a sleeved mode, sealant (7) is injected and filled in a bell and inserting opening gap in the left side of the annular rubber gasket (6), and the outer surface of a neat cement paste annular sealing layer (8), the outer side wall of the left cement pipe on the left side of the neat cement paste annular sealing layer (8) and the outer side wall of the right cement pipe on the right side of the neat cement paste annular sealing layer (8) are filled with sealant (7). A first water-leakage-proof coating layer (9) is arranged, a cement mortar protection layer (10) is arranged on the first water-leakage-proof coating layer (9), a second water-leakage-proof coating layer (11) is arranged on the cement mortar protection layer (10), and a plastic film layer is wrapped on the second water-leakage-proof coating layer (11). And seepage is effectively prevented, and quality problems or safety accidents caused by seepage are prevented.

Description

Technical Field

[0001] The utility model relates to a cement bell-and-spigot pipe, in particular to a sealing structure at the interface of a cement bell-and-spigot pipe for rainwater and sewage drainage. Background Art

[0002] Outdoor rainwater and sewage drainage pipes generally use socket-type cement pipes. During the installation of socket-type cement pipes with smaller diameters, the socket joints of the pipes are generally sealed externally. The conventional sealing method is to seal the socket joint gap with mortar. This method is simple and easy to operate, but the sealing effect is poor. The seal is often not tight due to improper operation, resulting in water seepage at the socket joints of the pipe fittings during later use. After long-term soaking in water, the bearing capacity of the foundation soil at the seepage location decreases, causing ground sinking or collapse. How to improve the sealing performance of the socket joint and avoid the above phenomenon has become a topic that needs attention in pipeline installation and construction. Summary of the invention

[0003] The utility model provides a sealing structure at a cement bell-and-spigot pipe interface, which solves the technical problem of how to improve the sealing performance of the bell-and-spigot interface and avoid water seepage.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] A sealing structure at a cement bell-and-spigot pipe interface comprises a right cement pipe and a left cement pipe connected in a bell-and-spigot manner, wherein a cement pipe socket end is arranged at the left end of the right cement pipe, and a cement pipe spigot end is arranged at the right end of the left cement pipe, and the left cement pipe is plugged into the cement pipe socket end of the right cement pipe through the cement pipe spigot end; an annular rubber gasket is sleeved on the cement pipe spigot end, and a sealing adhesive is injected into the socket gap on the left side of the annular rubber gasket; a plain cement slurry annular sealing layer is arranged on the outer annular step formed after the cement pipe socket end and the cement pipe spigot end are plugged together; a first water-tight coating layer is arranged on the outer surface of the plain cement slurry annular sealing layer, on the outer side wall of the left cement pipe on the left side of the plain cement slurry annular sealing layer, and on the outer side wall of the right cement pipe on the right side of the plain cement slurry annular sealing layer; a cement mortar protective layer is arranged on the first water-tight coating layer; a second water-tight coating layer is arranged on the cement mortar protective layer; and a plastic film layer is wrapped on the second water-tight coating layer.

[0006] Pads are arranged at intervals below the right cement pipe and the left cement pipe, a trench bottom concrete cushion is arranged below the pads, and the trench bottom concrete cushion is arranged on the bottom end surface of the trench.

[0007] The utility model strengthens the airtight sealing effect of the socket and spigot of the rainwater and sewage pipe, can effectively resist seepage, and prevents quality problems or safety accidents caused by leakage, and has the characteristics of simple and quick process. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural schematic diagram of the utility model;

[0009] Figure 2 yes Figure 1 AA section view in. DETAILED DESCRIPTION

[0010] The utility model is described in detail below with reference to the accompanying drawings:

[0011] A sealing structure at a cement bell-and-spigot pipe interface, comprising a right cement pipe and a left cement pipe connected to each other by bell and spigot, a cement pipe socket end 4 is arranged at the left end of the right cement pipe, a cement pipe spigot end 5 is arranged at the right end of the left cement pipe, the left cement pipe is plugged into the cement pipe bell end 4 of the right cement pipe through the cement pipe spigot end 5; an annular rubber gasket 6 is sleeved on the cement pipe spigot end 5, the annular rubber gasket 6 is arranged in the bell after the two pipes are spigot-jointed, a sealant 7 is injected into the bell gap on the left side of the annular rubber gasket 6, the bell gap is filled by injecting the sealant 7, and the cement pipe socket end is sealed. On the outer annular step formed after the socket end 5 of the cement pipe is connected with the socket end 4, a plain cement slurry annular sealing layer 8 is arranged, and on the outer surface of the plain cement slurry annular sealing layer 8, on the outer wall of the left cement pipe on the left side of the plain cement slurry annular sealing layer 8, and on the outer wall of the right cement pipe on the right side of the plain cement slurry annular sealing layer 8, that is, at the transition outside the socket, a first water-tight coating layer 9 is arranged, on the first water-tight coating layer 9, a cement mortar protective layer 10 is arranged, on the cement mortar protective layer 10, a second water-tight coating layer 11 is arranged, and on the second water-tight coating layer 11 is wrapped with a plastic film layer.

[0012] Pads 3 are arranged at intervals below the right cement pipe and the left cement pipe, a trench bottom concrete cushion layer 2 is arranged below the pads 3, and the trench bottom concrete cushion layer 2 is arranged on the bottom end surface of the trench 1; the pads are arranged to achieve a smooth connection between the two cement pipes after socket joints.

[0013] The implementation process of the utility model is as follows: various types of buried cement pipe fittings are purchased according to the construction drawings, and the wall thickness and cross-sectional dimensions of the pipe fittings meet the requirements of the specifications; the trench 1 is excavated according to the design positioning to ensure that the excavation depth and the slope depth meet the design requirements, and the base soil must meet the relevant geological survey requirements and have certain bearing requirements; after the trench 1 is excavated, a 100 mm thick C15 trench bottom concrete cushion layer 2 is made at the bottom of the trench, and after the trench bottom concrete cushion layer 2 has a certain strength, the cement pipe fittings are transported to In the groove 1, the pipe fittings are butted and socketed according to the pipe fitting connection ports. Before the cement pipe is butted, the annular rubber gasket 6 is put on the socket tail end of the pipe fitting at the socket end 4 of the cement pipe. After the pipe fittings are butted, in order to prevent the pipe fittings from moving, pads 3 supports can be set at intervals at both ends of the pipe fittings. This support can be built with machine red bricks; after the pipe fittings are stabilized, the pipe mouth position is sealed and plugged. First, the pipe interface position is flushed to ensure that there is no residual material such as floating dust. After cleaning, a glue gun is used to inject sealant 7 into the socket pipe mouth. The sealing glue 7 must be filled in place along the gap of the pipe interface and squeezed full. After inspection and acceptance, the next process is carried out. After the sealing glue 7 is filled, a plain cement slurry annular sealing layer 8 is set on the external annular step formed after the cement pipe socket end 4 and the cement pipe spigot end 5 are plugged in. The first layer of water-tight coating is set on the outer surface of the plain cement slurry annular sealing layer 8, on the outer side wall of the left cement pipe on the left side of the plain cement slurry annular sealing layer 8, and on the outer side wall of the right cement pipe on the right side of the plain cement slurry annular sealing layer 8, that is, at the transition outside the socket. A 1:2 cement mortar protective layer 10 is arranged on the first water-tight coating layer 9, a second water-tight coating layer 11 is arranged on the cement mortar protective layer 10, and a plastic film layer is wrapped on the second water-tight coating layer 11; the painting must be evenly applied, and a fiber mesh cloth is mixed inside the 1:2 cement mortar protective layer 10 to play an anti-cracking and anti-falling role; after all the above processes are completed, after the on-site closed water test and other acceptance without quality problems, the trench 1 is backfilled according to the design requirements.

Claims

1. A sealing structure at a cement bell-and-spigot joint, comprising a right cement pipe and a left cement pipe connected in bell-and-spigot connection, wherein a cement pipe socket end (4) is arranged at the left end of the right cement pipe, and a cement pipe spigot end (5) is arranged at the right end of the left cement pipe, and the left cement pipe is plugged into the cement pipe bell end (4) of the right cement pipe through the cement pipe spigot end (5); characterized in that: An annular rubber gasket (6) is sleeved on the cement pipe spigot end (5), a sealing glue (7) is injected into the socket gap on the left side of the annular rubber gasket (6), a plain cement slurry annular sealing layer (8) is provided on the outer annular step formed after the cement pipe spigot end (4) and the cement pipe spigot end (5) are plugged together, a first water-tight coating layer (9) is provided on the outer surface of the plain cement slurry annular sealing layer (8), on the outer wall of the left cement pipe on the left side of the plain cement slurry annular sealing layer (8), and on the outer wall of the right cement pipe on the right side of the plain cement slurry annular sealing layer (8), a cement mortar protective layer (10) is provided on the first water-tight coating layer (9), a second water-tight coating layer (11) is provided on the cement mortar protective layer (10), and a plastic film layer is wrapped on the second water-tight coating layer (11).

2. A sealing structure at a cement bell-and-spigot pipe interface according to claim 1, characterized in that: Pads (3) are arranged at intervals below the right cement pipe and the left cement pipe, a trench bottom concrete cushion layer (2) is arranged below the pads (3), and the trench bottom concrete cushion layer (2) is arranged on the bottom end surface of the trench (1).

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