Nodular cast iron jacking pipe

Abstract

The utility model discloses a nodular cast iron jacking pipe, which relates to the technical field of water supply and drainage pipelines and comprises a nodular cast iron jacking pipe nipple, two groups of first jacking flanges are fixedly mounted on the peripheral surface of the nodular cast iron jacking pipe nipple at equal intervals, and a concrete protective layer is coated on the peripheral surface of the nodular cast iron jacking pipe nipple; the peripheral face of the concrete protection layer is sleeved with a protection sleeve, and the protection sleeve is in sliding connection with the concrete protection layer. According to the nodular cast iron jacking pipe, the jack is installed on the nodular cast iron jacking pipe nipple, the protective sleeve is driven by the jack to move along the concrete protective layer, the nodular cast iron jacking pipe nipple is transformed into an intermediate jacking station in pipe jacking operation, waste recycling is achieved, cost is reduced, and efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water supply and drainage pipes, in particular to a ductile iron jacking pipe. Background Art

[0002] Due to dense populations, high land acquisition and demolition costs, and the severe traffic congestion and environmental damage caused by excavating roads, pipe jacking technology allows for trenchless underground pipe laying without affecting surface buildings. Ductile iron pipe jacking is widely adopted and has become the preferred material for pipe jacking due to its environmentally friendly construction, long service life, short construction period, low overall cost, and convenient and quick installation, among other significant socioeconomic benefits.

[0003] At present, ductile iron jacking pipe is one of the existing trenchless jacking products. It contacts the load-bearing parts of the socket through the plug interface, thereby utilizing the jacking force transmission structure composed of the load-bearing parts and the socket structure to realize the jacking construction of the jacking pipe. However, the working well area required for a 6-meter-long ductile iron jacking pipe is large, which is generally difficult to meet on the construction site. During production, the 6-meter-long (generally the production length is 6 meters) jacking pipe needs to be cut into 2-meter-4-meter lengths to make jacking pipes with sockets, resulting in the remaining ductile iron jacking pipe short sections without sockets being stored for a long time and unable to be used or recycled, resulting in increased pipe casting costs and reduced profits.

[0004] How to develop a ductile iron jacking pipe that can recycle the short sections of the ductile iron jacking pipe to reduce costs and increase efficiency has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0005] The purpose of the utility model is to provide a ductile iron jacking pipe to solve the problems listed in the background technology.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The utility model discloses a ductile iron jacking pipe, comprising a ductile iron jacking pipe short section, wherein two groups of first jacking flanges are fixedly installed at equal intervals on the outer circumference of the ductile iron jacking pipe short section, and the outer circumference of the ductile iron jacking pipe short section is covered with a concrete protective layer;

[0008] A protective sleeve is sleeved on the outer peripheral surface of the concrete protective layer, and the protective sleeve is slidably connected to the concrete protective layer.

[0009] Preferably, the side walls between the opposite surfaces of the two groups of the first pushing flanges are fixedly connected to the side walls of the pushing reinforcement ribs, and the bottom of the pushing reinforcement ribs is fixedly connected to the outer side wall of the ductile iron pushing pipe short section.

[0010] Preferably, both ends of the concrete protective layer abut against opposite surfaces of the two groups of the first jacking flanges, and the outer diameter of the concrete protective layer is not less than the installation height of the first jacking flanges.

[0011] Preferably, a guide groove is provided on the outer peripheral surface of the concrete protective layer in the axial direction, and one end opening of the guide groove passes through the side wall of the concrete protective layer.

[0012] Preferably, the inner diameter of the protective sleeve is equal to the outer diameter of the concrete protective layer, and sealing gaskets are installed at the openings at both ends of the protective sleeve, and the sealing gaskets abut against the outer wall surface of the concrete protective layer.

[0013] Preferably, a second pushing flange is fixedly mounted on the inner wall of the opening at one end of the protective sleeve, and the installation position of the second pushing flange corresponds to that of the first pushing flange;

[0014] A jack is fixedly installed between the side walls of the first thrust flange and the second thrust flange.

[0015] Preferably, it further comprises guide tubes, which are installed at equal intervals on the inner wall of the protective sleeve, and the guide tubes are matched with the opening positions of the guide grooves.

[0016] Compared with the prior art, the beneficial technical effects of the present invention are:

[0017] The utility model discloses a ductile iron jacking pipe. A jack is installed on a short section of the ductile iron jacking pipe. The jack drives a protective sleeve to move along a concrete protective layer. The short section of the ductile iron jacking pipe is transformed into a relay room in the jacking operation, thereby realizing waste recycling and reducing costs and increasing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the assembly of a ductile iron jacking pipe of the utility model (without protective casing and concrete protective layer);

[0020] Figure 2 This is a three-dimensional schematic diagram of a ductile iron jacking pipe (without concrete protective layer) of the utility model;

[0021] Figure 3 The utility model is a cross-sectional schematic diagram of a ductile iron jacking pipe.

[0022] Explanation of the accompanying symbols: 1. Ductile iron jacking pipe short section; 2. jacking reinforcement rib; 3. First jacking flange; 4. Jack; 5. Protective sleeve; 6. Second jacking flange; 7. Guide pipe; 8. Concrete protective layer; 9. Guide groove. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is 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 intended to limit the present invention.

[0024] like Figure 1-3 As shown, a ductile iron jacking pipe comprises a ductile iron jacking pipe nipple 1, two sets of first jacking flanges 3 are fixedly installed at equal intervals on the outer circumference of the ductile iron jacking pipe nipple 1, and the outer circumference of the ductile iron jacking pipe nipple 1 is covered with a concrete protective layer 8;

[0025] A protective sleeve 5 is sleeved on the outer circumference of the concrete protective layer 8 , and the protective sleeve 5 is slidably connected to the concrete protective layer 8 .

[0026] Specifically, the side walls between the opposite surfaces of the two groups of the first jacking flanges 3 are fixedly connected to the side walls of the jacking reinforcement ribs 2 , and the bottoms of the jacking reinforcement ribs 2 are fixedly connected to the outer side walls of the ductile iron jacking pipe nipple 1 .

[0027] Specifically, both ends of the concrete protective layer 8 abut against the opposite surfaces of the two groups of the first jacking flanges 3 , and the outer diameter of the concrete protective layer 8 is not less than the installation height of the first jacking flanges 3 .

[0028] Specifically, a guide groove 9 is axially provided on the outer peripheral surface of the concrete protective layer 8 , and one end of the guide groove 9 is opened to pass through the side wall of the concrete protective layer 8 .

[0029] Specifically, the inner diameter of the protective sleeve 5 is equal to the outer diameter of the concrete protective layer 8. Sealing pads are installed at the openings at both ends of the protective sleeve 5. The sealing pads abut against the outer wall of the concrete protective layer 8, which can effectively prevent external mud from entering the interior of the pipeline.

[0030] During the construction process, wax melting measures and thixotropic mud technology are used on the outer surface of the concrete protective layer to reduce the jacking resistance and stabilize the surrounding soil.

[0031] Specifically, a second push flange 6 is fixedly mounted on the inner wall of one end opening of the protection sleeve 5, and the installation position of the second push flange 6 corresponds to that of the first push flange 3;

[0032] A jack 4 is fixedly installed between the side walls of the first thrust flange 3 and the second thrust flange 6;

[0033] It also includes guide tubes 7, which are installed on the inner wall of the protective sleeve 5 at equal intervals, and the guide tubes 7 match the opening positions of the guide grooves 9;

[0034] When the jack is performing telescopic operation, it can drive the protective sleeve to move synchronously along the guide groove through the guide tube;

[0035] The guide tube can further ensure the compressive strength of the protective casing, preventing the soil above the protective casing from squeezing and deforming the protective casing during the jacking process, thereby affecting the subsequent jacking operation of the protective casing.

[0036] After the jacking operation is completed, the jacks are removed from front to back in sequence so that the first jacking flange and the second jacking flange are abutted against each other. At the same time, the guide pipe and the guide groove are overlapped. Grouting is injected through the grouting holes to seal the gap between the protective casing and the ductile iron jacking pipe short section to prevent leakage at the joints when water flows through the pipeline, erosion of the outer soil, and irregular settlement of the upper soil layer.

[0037] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0038] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements to the technical solutions of the present invention made by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A ductile iron jacking pipe, comprising a ductile iron jacking pipe nipple (1), characterized in that: Two sets of first jacking flanges (3) are fixedly installed at equal intervals on the outer peripheral surface of the ductile iron jacking pipe short section (1), and the outer peripheral surface of the ductile iron jacking pipe short section (1) is covered with a concrete protective layer (8); A protective sleeve (5) is sleeved on the outer peripheral surface of the concrete protective layer (8), and the protective sleeve (5) is slidably connected to the concrete protective layer (8).

2. The ductile iron jacking pipe according to claim 1, characterized in that: The side walls between the opposite surfaces of the two groups of the first jacking flanges (3) are fixedly connected to the side walls of the jacking reinforcement ribs (2), and the bottom of the jacking reinforcement ribs (2) is fixedly connected to the outer side wall of the ductile iron jacking pipe short section (1).

3. The ductile iron jacking pipe according to claim 2, characterized in that: Both ends of the concrete protective layer (8) abut against the opposite surfaces of the two groups of the first thrust flanges (3), and the outer diameter of the concrete protective layer (8) is not less than the installation height of the first thrust flanges (3).

4. The ductile iron jacking pipe according to claim 3, characterized in that: A guide groove (9) is provided on the outer peripheral surface of the concrete protective layer (8) along the axial direction, and one end opening of the guide groove (9) passes through the side wall of the concrete protective layer (8).

5. The ductile iron jacking pipe according to claim 4, characterized in that: The inner diameter of the protective sleeve (5) is equal to the outer diameter of the concrete protective layer (8), and sealing pads are installed at the openings at both ends of the protective sleeve (5), and the sealing pads abut against the outer wall surface of the concrete protective layer (8).

6. The ductile iron jacking pipe according to claim 5, characterized in that: A second push flange (6) is fixedly mounted on the inner wall of one end opening of the protective sleeve (5), and the second push flange (6) corresponds to the installation position of the first push flange (3); A jack (4) is fixedly installed between the side walls of the first thrust flange (3) and the second thrust flange (6).

7. The ductile iron jacking pipe according to claim 6, characterized in that: It also includes guide tubes (7), which are installed at equal intervals on the inner wall of the protective sleeve (5), and the opening positions of the guide tubes (7) and the guide grooves (9) match each other.

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