Push pipe for pollution discharge through expansion lock sealing connection

Abstract

The utility model provides an expansion lock sealing connection blowdown jacking pipe, which relates to the technical field of blowdown pipes, and comprises a plastic outer layer, a nodular cast iron joint and an iron pipe inner layer, the plastic outer layer is coated on the outer side of the iron pipe inner layer, one end of the plastic outer layer is provided with the nodular cast iron joint, and the nodular cast iron joint is sleeved on the outer side of the iron pipe inner layer. The nodular cast iron joint is used as a jacking pipe connecting part, the situation that the jacking pipe is prone to being snapped in the installing, jacking and pulling process is avoided, the plastic outer layer is arranged on the iron pipe inner layer in a sleeved mode, ring stiffness of the jacking pipe is further improved, the pipe is integrally reinforced, adaptability and designability are improved, and cost is reduced. Rubber ring grooves are formed in the outer roots of the two ends of the socket of the nodular cast iron joint, elastic rubber sealing rings can be placed in the rubber ring grooves, the sealing performance is more reliable, the inner diameter of the jacking pipe socket is smaller than the outer diameter of the socket, expansion lock sealing connection is formed, the sealing performance can be better guaranteed, and retaining teeth are arranged on the periphery of the cast iron joint to prevent the pipe from shifting and disengaging.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage pipes, in particular to a jacking pipe for sewage discharge with expansion lock and sealing connection. Background Art

[0002] In underground water supply and drainage, such as sewage treatment in many fields of water conservancy, industry, and urban construction, sewage pipes are an indispensable and important component. They are the basic components and important connecting hubs in the water supply and drainage network system. There are many different types of sewage pipes available.

[0003] The joints of the existing all-plastic flexible sealed self-locking interface jacking pipe are relatively fragile and easily broken during the installation and jacking process. At the same time, the ring stiffness of the all-plastic jacking pipe is low, which is not suitable for construction sites with complex geological environments under non-excavation conditions. Therefore, we propose a new type of expansion-locking sealed connection jacking pipe for sewage discharge. Utility Model Content

[0004] The purpose of the utility model is to solve the problems in the prior art that the joint parts of the all-plastic flexible sealed self-locking interface jacking pipe are relatively fragile and easily broken during the installation and pulling process. At the same time, the ring stiffness of the all-plastic jacking pipe is low and it is not suitable for construction sites with complex geological environments under non-excavation conditions. A jacking pipe for sewage discharge with an expansion lock sealing connection is proposed.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solution: a jack pipe for expansion lock sealing connection for sewage discharge, comprising a plastic outer layer, a ductile iron joint and an iron pipe inner layer, the plastic outer layer is coated on the outside of the iron pipe inner layer, a ductile iron joint is provided at one end of the plastic outer layer, the ductile iron joint is sleeved on the outside of the iron pipe inner layer, and a rubber sealing ring is symmetrically sleeved on the outside of the ductile iron joint.

[0006] Furthermore, a limiting ring is provided on the outer side of the ductile iron joint, and the limiting ring is connected to one end of the plastic outer layer.

[0007] Furthermore, a socket is provided at one end of the plastic outer layer.

[0008] Furthermore, a socket is provided at the other end of the plastic outer layer.

[0009] Furthermore, the outer wall of the ductile iron joint is provided with stop teeth.

[0010] Furthermore, a plurality of grooves are formed on the inner wall of the plastic outer layer, and the grooves are connected to the retaining teeth.

[0011] Furthermore, a groove is formed on the outer wall of the ductile iron joint, and the rubber sealing ring is connected to the inside of the groove.

[0012] Furthermore, embedding grooves are provided at both ends, and the embedding is installed on the inner side of the embedding grooves.

[0013] Compared with the prior art, the advantages and positive effects of the present invention are:

[0014] 1. In the present invention, by sleeved plastic outer layer on the inner layer of iron pipe, the ring stiffness of jacking pipe is further improved, so that the pipe is strengthened as a whole, firm and reliable, and the adaptability and design are improved. A rubber ring groove is provided at the outer root of the cast iron joint socket, in which an elastic rubber sealing ring can be placed, and the rubber sealing ring is effectively used to increase the sealing performance, and the sealing is more reliable. The ductile iron joint is used as a connecting component of the jacking pipe, which avoids the situation that it is easy to be pulled off during the installation and pulling process. In addition, the outer periphery of the cast iron joint is provided with a back-off tooth, and the inner periphery of the socket that fits with it is provided with a corresponding groove to prevent the pipe from shifting and falling out. The inner diameter of the jacking pipe socket is smaller than the outer diameter of the socket. The rigid socket and the elastic socket are connected with each other by socket, and the rigid and flexible interference fit is locked on the socket by the expansion and contraction of the socket, forming an expansion-locking sealing connection, achieving the effect of locking and sealing, and the sealing performance is good.

[0015] 2. In the present invention, the limiting ring facilitates quick installation and positioning, ensuring stability. The socket and the spigot facilitate matching and plugging. The outer diameter of the inner iron pipe is slightly larger than the inner diameter of the outer plastic pipe, forming an expansion lock seal that is stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a jack pipe for sewage discharge that is connected by expansion lock sealing;

[0017] Figure 2 The utility model provides a schematic diagram of the exploded structure of a jacking pipe for sewage discharge with an expansion lock seal connection;

[0018] Figure 3 This is a schematic diagram of the structure of a jacking pipe for sewage discharge that is connected by expansion lock sealing.

[0019] Figure 4 The utility model provides a structural schematic diagram of a jack pipe for sewage discharge with an expansion lock and sealing connection.

[0020] Legend: 1. Plastic outer layer; 2. Iron pipe inner layer; 3. Ductile iron joint; 4. Limiting ring; 5. Socket; 6. Socket; 7. Rubber sealing ring; 8. Anti-retraction tooth. DETAILED DESCRIPTION

[0021] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] Example 1, as Figures 1-4 As shown, the utility model provides a top pipe for sewage discharge with an expansion lock and sealing connection, comprising a plastic outer layer 1 and an iron pipe inner layer 2, the plastic outer layer 1 being coated on the outside of the iron pipe inner layer 2, a ductile iron joint 3 being provided at one end of the plastic outer layer 1, the ductile iron joint 3 being sleeved on the outside of the iron pipe inner layer 2, a rubber sealing ring 7 being symmetrically sleeved on the outside of the ductile iron joint 3, a retaining tooth 8 being distributed on the outer wall of the ductile iron joint 3, a plurality of grooves being provided on the inner wall of the plastic outer layer 1, the grooves being connected to the retaining teeth 8, a groove being provided on the outer wall of the ductile iron joint 3, the rubber sealing ring 7 being connected to the inside of the groove, an embedded groove being provided at both ends of 1, and 3 being embedded and installed on the inner side of the embedded groove.

[0024] The effect achieved by the entire embodiment 1 is that in this device, by sleeved on the plastic outer layer 1 on the iron pipe inner layer 2, the ring stiffness of the jacking pipe is further improved, so that the overall pipe is strengthened, firm and reliable, and the adaptability and design are improved. A rubber ring groove is provided at the outer root of the ductile iron joint socket, in which an elastic rubber sealing ring can be placed, and the rubber sealing ring 7 is used to effectively increase the sealing performance, and the sealing is more reliable. The ductile iron joint is used as a connecting component of the jacking pipe, which avoids the situation where it is easy to be pulled apart during the installation and pulling process, and the outer periphery of the ductile iron joint is provided with a back-off tooth 8, and the inner periphery of the socket that fits with it is provided with a corresponding groove to prevent the pipe from shifting and falling out. The inner diameter of the jacking pipe socket is smaller than the outer diameter of the socket. The rigid socket and the elastic socket are connected with a socket, and the rigid and flexible interference fit is locked on the socket by relying on the expansion and contraction of the socket to form an expansion-locking sealing connection, achieving the effect of locking sealing, and the sealing performance is good.

[0025] Example 2, as Figures 1-4 As shown, the only difference between this embodiment and embodiment 1 is that a limit ring 4 is provided on the outside of the ductile iron joint 3, the limit ring 4 is connected to one end of the plastic outer layer 1, a socket 5 is provided at one end of the plastic outer layer 1, and a socket 6 is provided at the other end of the plastic outer layer 1.

[0026] The effect achieved by the entire embodiment 2 is that the limiting ring 4 facilitates convenient installation and quick positioning, ensuring stability, and the socket 5 and the plug 6 facilitate matching and plugging. The outer diameter of the inner steel pipe is slightly larger than the inner diameter of the outer plastic pipe, forming an expansion lock seal, which is stable and reliable.

[0027] Example 3, as Figure 2As shown, the only difference between this embodiment and embodiment 1 and embodiment 2 is that the iron pipe inner layer 2 is not provided inside the plastic outer layer 1, and only a ductile iron joint 3 is provided at the joint position of the plastic outer layer 1, which mainly serves to strengthen the strength of the lifting connection to ensure the stability of the connection and avoid the situation where it is easy to be pulled apart during the installation and pulling process.

[0028] Working principle: First, the plastic outer layer 1 is put on the inner layer 2 of the iron pipe to strengthen the overall pipe material, making it firm and reliable, which is beneficial to further improve the ring stiffness of the jacking pipe, and improves the adaptability and design. In addition, a rubber ring groove is provided at the outer root of the cast iron joint socket, in which an elastic rubber sealing ring can be placed. In combination with the rubber sealing ring 7, the sealing performance is effectively increased, and the sealing is more reliable. The ductile iron joint is used as a connecting component of the jacking pipe to avoid the situation where it is easy to be pulled apart during the installation and jacking process. The outer periphery of the cast iron joint is provided with a stop tooth 8, and the inner periphery of the socket that fits with it is provided with a corresponding groove to prevent the pipe from shifting and falling out. The limit ring 4 is conducive to convenient installation and quick positioning, ensuring stability. The socket 5 and the socket 6 facilitate matching and plugging. The outer diameter of the inner steel pipe is slightly larger than the inner diameter of the outer plastic pipe, forming an expansion lock seal, which is firm, reliable and has good sealing performance.

[0029] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A jacking pipe for sewage discharge with expansion lock sealing connection, characterized by: The invention comprises a plastic outer layer (1) and an iron pipe inner layer (2), wherein the plastic outer layer (1) is coated on the outer side of the iron pipe inner layer (2), a ductile iron joint (3) is provided at one end of the plastic outer layer (1), the ductile iron joint (3) is sleeved on the outer side of the iron pipe inner layer (2), and a rubber sealing ring (7) is symmetrically sleeved on the outer side of the ductile iron joint (3).

2. The expansion-locking, sealing connection sewage jacking pipe according to claim 1, characterized in that: A limiting ring (4) is provided on the outer side of the ductile iron joint (3), and the limiting ring (4) is connected to one end of the plastic outer layer (1).

3. The expansion-locking, sealing connection sewage jacking pipe according to claim 1, characterized in that: One end of the plastic outer layer (1) is provided with a socket (5).

4. The expansion-locking, sealing connection sewage jacking pipe according to claim 1, characterized in that: The other end of the plastic outer layer (1) is provided with a socket (6).

5. The expansion-locking, sealing connection sewage jacking pipe according to claim 4, characterized in that: The outer wall of the ductile iron joint (3) is provided with stop teeth (8).

6. The expansion-locking, sealing connection sewage jacking pipe according to claim 5, characterized in that: The inner wall of the plastic outer layer (1) is provided with a plurality of grooves, and the grooves are connected to the stop teeth (8).

7. The expansion-locking, sealing connection sewage jacking pipe according to claim 1, characterized in that: The outer wall of the ductile iron joint (3) is provided with a groove, and the rubber sealing ring (7) is connected inside the groove.

8. The expansion-locking, sealing connection sewage jacking pipe according to claim 1, characterized in that: Both ends of the (1) are provided with embedding grooves, and the (3) is embedded and installed on the inner side of the embedding grooves.

Images