Expansion lock sealing connection drainage pipe

Abstract

The utility model discloses an expansion lock sealing connection drain pipe which comprises a pipe body and a connecting pipe, and socket heads are arranged at the two ends of the connecting pipe. The pipe body is provided with a socket, and the length of the socket is smaller than that of the socket. The outer diameter of the socket head is in interference fit with the inner diameter of the socket opening, and the socket head is provided with a connecting sealing groove; the insertion port is provided with a pipe body sealing groove; the connecting sealing groove and the pipe body sealing groove form a sealing cavity, and a sealing ring is installed in the sealing cavity. The utility model has the beneficial effects that the outer diameter of the socket head is in interference fit with the inner diameter of the birdmouth, and the sealing cavity and the sealing ring are arranged at the joint of the socket head and the birdmouth close to the baffle plate, so that the sealing ring can be melted by heating after connection and installation; the connecting pipe and the pipe body can be better sealed, and meanwhile the anti-drawing effect of the pipe body and the connecting pipe can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline technical field, concretely relates to a kind of expansion lock sealing connection drain pipe. BACKGROUND

[0002] In the non-excavation laying and repair construction of municipal drainage pipeline, the above-mentioned various pipe materials can be installed in small space with simple interface HDPE solid wall pipe section, which has the advantages of convenient connection, good sealing performance, tensile resistance, easy pipe laying in inspection well or working well, replacement by jacking into the original pipeline, etc. However, the existing HDPE solid wall pipe (DN300-800mm) pipe section has a length of 0.5m, 1m, 1.5m, etc. During installation or maintenance construction, the existing butt joint method for pipe interface only includes hot melt butt joint, clamp connection, electric heating melting, and hot shrinkable tape connection. Currently, some connections are made through interference fit, but during the fitting process, the interface may be enlarged and warped, the connection is not sealed tightly, and the anti-pulling effect is not good. SUMMARY

[0003] The utility model aims to solve the above-mentioned problems and provides a kind of expansion lock sealing connection drain pipe, which is described in detail below.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions:

[0005] The utility model provides a kind of expansion lock sealing connection drain pipe, which includes a pipe body and a connecting pipe, the connecting pipe is provided with a socket head at both ends; the pipe body is provided with a socket interface, the length of the socket head is less than the length of the socket interface; the socket head is interference fitted between the outer diameter and the inner diameter of the socket interface, the socket head is provided with a connecting sealing groove; the socket interface is provided with a pipe body sealing groove; the connecting sealing groove and the pipe body sealing groove form a sealed cavity, and the sealed cavity is installed with a sealing ring.

[0006] As a preferred, the connecting pipe is provided with a protruding annular baffle in the middle, when the pipe fitting is butt jointed with the connecting pipe, one end of the pipe fitting is next to one side of the baffle.

[0007] As a preferred, the socket head is further provided with a retreat-stop tooth; the socket interface is provided with an expansion part, and the retreat-stop tooth is matched with the expansion part.

[0008] As a preferred, the socket head is further provided with a locking ring semicircular protruding retreat-stop ring; the socket interface is provided with an expansion sleeve semicircular annular groove, and the locking ring semicircular protruding retreat-stop ring is matched with the expansion sleeve semicircular annular groove.

[0009] As a preferred, the cross section of the sealed cavity is circular.

[0010] As preferred, the cross section of the sealing cavity is trapezoidal.

[0011] As preferred, the cross section of the sealing cavity is trapezoidal.

[0012] As preferred, the connecting pipe is a nodular cast iron pipe, a galvanized steel pipe or a resin steel mesh composite pipe.

[0013] As preferred, the pipe body is made of plastic.

[0014] The beneficial effect is that the utility model discloses a sealing cavity is arranged at the connecting place of the socket head and the receiving port close to the baffle, and a sealing ring is installed, so that the connecting pipe and the pipe body can be sealed better after being connected and installed, and the tensile effect of the pipe body and the connecting pipe can be increased. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced as follows, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor.

[0016] Figure 1 It is the structural schematic diagram of the utility model;

[0017] Figure 2 It is Figure 1 Part enlarged view in it.

[0018] The reference signs are explained as follows:

[0019] 1, pipe body; 101, pipe body sealing groove; 102, expansion sleeve semicircular recess; 103, expansion part; 2, connecting pipe; 201, stop tooth; 202, locking ring semicircular convex stop ring; 203, connecting sealing groove; 204, stop part; 3, sealing ring. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantage of the utility model more clear, the technical scheme of the utility model will be described in detail as follows. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the range of the utility model.

[0021] Refer to Figures 1-2The utility model provides an expand lock sealing connection drain pipe, including pipe body 1 and connecting pipe 2, the connecting pipe 2 both ends are provided with socket head, pipe body 1 is provided with the socket, the length of socket head is less than the length of socket, the interference fit between socket head outer diameter and socket inner diameter, socket head is provided with connecting sealing groove 203, the socket is provided with pipe body 1 sealing groove, connecting sealing groove 203 and pipe body 1 sealing groove form sealed cavity, sealed cavity is installed with sealing ring 3, the interference fit between socket head outer diameter and socket inner diameter in the embodiment, therefore, the material of socket is flexible material, and the socket is rigid, namely pipe body 1 is more easily deformed relative to connecting pipe 2, and the plastic deformation of pipe is utilized to reach the sealing effect, in addition, after installation, sealing ring 3 can be fused by hot melting, to make sealing ring 3 and sealing ring 3 melt, increase the sealing property of pipe body 1 and connecting pipe 2, and also can increase the pull resistance of pipe body 1 and connecting pipe 2 after fusion.

[0022] In the embodiment, the connecting pipe 2 is provided with a raised annular baffle in the middle, and when the pipe is connected to the connecting pipe 2, one end of the pipe is next to one side of the baffle.

[0023] In the embodiment, the socket head is further provided with a retreat-preventing tooth 201, and the socket is provided with an expanding part 103, the retreat-preventing tooth 201 and the expanding part 103 are matched, and the connection strength is increased by expanding and then being clamped into the groove.

[0024] In the embodiment, the socket head is further provided with a locking ring semicircular raised retreat-preventing ring 202, and the socket is provided with an expanding sleeve semicircular annular groove 102, the locking ring semicircular raised retreat-preventing ring 202 and the expanding sleeve semicircular annular groove 102 are matched.

[0025] In the embodiment, the cross section of the sealed cavity is circular, and the circular sealing ring is easy to install and position.

[0026] In the embodiment, the cross section of the sealed cavity is trapezoidal, and the pull resistance effect is increased.

[0027] In the embodiment, the cross section of the sealed cavity is parallelogram.

[0028] In the embodiment, the connecting pipe 2 is a nodular cast iron pipe, a galvanized steel pipe, or a resin steel mesh composite pipe.

[0029] In the embodiment, the pipe body 1 is made of plastic.

[0030] In addition, the sealing ring 3 can be selected from nitrile rubber, silicone, fluorine rubber, ethylene-propylene rubber, polytetrafluoroethylene or polyurethane, and the sealing ring 3 will swell after being soaked in water, so that when water flows into the opening of the sealing ring 3, the opening of the sealing ring 3 is enlarged, the sealing ring 3 can block the water flow, and after swelling, the sealing ring 3 is more fitted with the spigot structure and the socket structure, thereby further enhancing the sealing effect, and the scheme does not need to be heated and fused.

[0031] The above is only a specific implementation manner of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A drain pipe with an expansion-lock sealing connection, characterized in that: The device includes a pipe body and a connecting pipe, wherein the connecting pipe is provided with a socket at both ends; the pipe body is provided with a insertion interface, and the length of the socket is less than the length of the socket; the outer diameter of the socket and the inner diameter of the socket are interference-fitted, and the socket is provided with a connecting sealing groove; the insertion interface is provided with a pipe body sealing groove; the connecting sealing groove and the pipe body sealing groove form a sealing cavity, and a sealing ring is installed in the sealing cavity.

2. The expansion-lock sealing connection drain pipe according to claim 1, characterized in that: The connecting pipe has a raised annular baffle in the middle. When the fitting is connected to the connecting pipe, one end of the fitting is close to the side of the baffle.

3. The expansion-lock sealing connection drain pipe according to claim 2, characterized in that: The connector is also provided with anti-retraction teeth; the insertion interface is provided with a tightening part, and the anti-retraction teeth and the tightening part cooperate with each other.

4. The expansion-lock sealing connection drain pipe according to claim 3, characterized in that: The connector is also provided with a locking ring semi-circular protrusion anti-reverse ring; the insertion interface is provided with a shrink sleeve semi-circular annular groove, and the locking ring semi-circular protrusion anti-reverse ring and the shrink sleeve semi-circular annular groove cooperate with each other.

5. The expansion-lock sealing connection drain pipe according to claim 1, characterized in that: The cross-section of the sealed cavity is circular.

6. The expansion-lock sealing connection drain pipe according to claim 1, characterized in that: The cross-section of the sealed cavity is trapezoidal.

7. The expansion-lock sealing connection drain pipe according to claim 1, characterized in that: The cross-section of the sealed cavity is a parallelogram.

8. The expansion-lock sealing connection drain pipe according to claim 1, characterized in that: The connecting pipe is a ductile iron pipe, a galvanized steel pipe, or a resin-coated steel mesh composite pipe.

9. A drain pipe with an expansion-lock sealing connection according to claim 1, characterized in that: The tube body is made of plastic.

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