Nodular cast iron micro jacking pipe

Abstract

The utility model discloses a nodular cast iron micro jacking pipe, and belongs to the technical field of nodular cast iron micro jacking pipes. A nodular cast iron micro jacking pipe comprises a double-insertion pipe and further comprises a double-bearing sleeve, the double-bearing sleeve is located at one end of the double-insertion pipe, the double-insertion pipe is of a hollow cylinder structure, a protection layer is arranged on the outer wall of the double-insertion pipe, a lining is arranged on the inner wall of the double-insertion pipe, the protection layer and the lining are both made of concrete materials, and a reinforcing mesh is arranged in the protection layer. Positioning rings are arranged at the two ends of the double-bearing sleeve, and a boss is arranged between the two positioning rings. In order to solve the problem that a large amount of excess materials are wasted after a nodular cast iron pipe source is cut, so that the use cost is high, the excess materials cut during conventional jacking pipe production and machining are secondarily machined into double insertion pipes, and then the double insertion pipes, double bearing sleeves, sealing rubber rings and rubber gaskets are combined into a one-meter micro jacking pipe, so that the machining production excess materials are effectively utilized, and the production cost is reduced. And the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to nodular cast iron micro-top pipe technical field, specifically nodular cast iron micro-top pipe. BACKGROUND

[0002] An important application scene of nodular cast iron pipe is trenchless technology, trenchless construction technology is to lay and update nodular cast iron pipeline without excavation, and the trenchless construction has the characteristics of not damaging the environment and not affecting traffic, and can be implemented in some regions where excavation construction cannot be implemented, such as busy urban areas, historical conservation areas, crop and vegetation conservation areas, and crossing highways, railways, buildings and rivers and lakes, etc., thanks to China's rapid economic development and infrastructure construction, trenchless technology has developed rapidly in China in recent years, and common trenchless construction technology is mainly divided into traction method and pipe jacking method.

[0003] Pipe jacking technology is a trenchless pipe laying construction technology for municipal construction, and the pipe diameter is generally DN300-DN2200, which has the advantages of not affecting the surrounding environment or less affecting the surrounding environment, small construction site, low noise, and deep underground operation, which is an advantage that excavation pipe laying cannot match, and the working principle of pipe jacking technology is to push the tool pipe or tunneling machine from the working well through the soil layer to the receiving well, and at the same time, the pipe following the tool pipe or tunneling machine is buried between the two wells, realizing trenchless laying of underground pipes.

[0004] At present, the effective length of nodular cast iron pipe in China is mainly 6m, but the use of pipe jacking is often affected by special construction scenes, and there is not enough large site to excavate 6m pipe jacking construction well, and the larger the pipe jacking construction well, the higher the cost, therefore, 5m, 4m, 3m, 2m special length pipe jacking and 1m micro pipe jacking are correspondingly generated, and for special length pipe jacking and micro pipe jacking production, the 6m pipe source is cut to the target length, and then subsequent production processes are carried out, and the cut part is often treated as scrap iron, and the residual value is low, but the cost of nodular cast iron pipe source often accounts for a large part of the total cost of pipe jacking, so the cost loss caused by this is relatively large, and there is a problem of a large amount of waste of nodular cast iron pipe source after cutting, which leads to high use cost, therefore, the nodular cast iron micro pipe jacking cannot meet the existing demand, and the nodular cast iron micro pipe jacking is proposed. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of nodular cast iron micro-top pipe, by the residual material of twice processing into double insertion pipe when cutting during the production and processing of conventional pipe jacking, double insertion pipe and double sleeve, sealing rubber ring and rubber ring are combined into one meter micro pipe jacking, so as to effectively utilize the processing production residual material, reduce production cost, and solve the problems in the prior art.

[0006] To achieve the above object, the utility model provides the following technical scheme: A nodular cast iron micro pipe, comprising a double pipe, further comprising a double sleeve, the double sleeve is located at one end of the double pipe, the double pipe is a hollow cylindrical structure, a protective layer is arranged on the outer wall of the double pipe, an inner lining is arranged on the inner wall of the double pipe, the protective layer and the inner lining are both concrete materials, the inside of the protective layer is arranged in a reinforcing mesh, positioning rings are arranged at both ends of the double sleeve, a boss is arranged between the two positioning rings, the boss is an annular structure, the boss is fixed in the inside of the double sleeve, a sealing rubber ring is arranged between the double pipe and the double sleeve, a rubber washer is arranged between the positioning ring and the protective layer.

[0007] Preferably, one end of the double pipe is in contact with the boss, the thickness of the boss and the length of the double pipe are one meter, and chamfered surfaces are arranged at both ends of the double pipe.

[0008] Preferably, the diameter of the reinforcing steel in the reinforcing mesh is at least 3mm, the mesh size is at least 70mm*70mm, and the distance between the reinforcing mesh and the outer wall of the double pipe is at least half the thickness of the protective layer.

[0009] Preferably, the inside of the positioning ring is provided with a positioning block, one side of the protective layer is provided with a support column, one end of the support column is located in the inside of the protective layer, the other end of the support column is provided with a screw hole, and the other end of the support column extends to the inside of the positioning block through the rubber washer.

[0010] Preferably, the positioning block and the support column are connected through fixing screws, and both sides of the positioning block are provided with combination plates located in the inside of the positioning ring.

[0011] Preferably, the inside of the combination plate is provided with an insertion plate, and one end of the insertion plate extends to the outside of the positioning ring through the combination plate.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] 1、The utility model discloses a double pipe is formed by the secondary processing of the excess material cut during the production and processing of the conventional pipe, and the double pipe, the double sleeve, the sealing rubber ring and the rubber washer are combined into a one-meter micro pipe, thereby effectively utilizing the production and processing excess material and reducing the production cost.

[0014] 2, the utility model discloses a through setting the boss in the inside of double sleeve, the thickness of boss and the sum of double cannula length is one meter, personnel can adjust the thickness of boss to adapt to different length double cannula, guarantee the micro pipe length of double sleeve and double cannula combination at least one meter, and then improve the utilization of surplus material, and set up the support column on the side of protective layer in the protective layer pouring stage, before double cannula and double sleeve combination, first positioning block is connected with the support column through fixed screw, then one end of double cannula is inserted into the inside of double sleeve, positioning block is clamped in the inside of positioning ring, personnel fix positioning block in the inside of positioning ring through the plugboard, and then make double sleeve fixed at one end of double cannula, improve the firm degree of double cannula and double sleeve combination, improve the stability in the subsequent jacking process. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the overall front view of the utility model;

[0016] Figure 2 It is the double cannula local structure schematic view of the utility model;

[0017] Figure 3 It is the double sleeve local structure schematic view of the utility model;

[0018] Figure 4 It is the positioning block local structure schematic view of the utility model;

[0019] Figure 5 It is the support column local structure schematic view of the utility model.

[0020] In the drawing: 1, double cannula;101, protective layer;102, reinforcement net;103, inner lining;2, double sleeve;201, boss;202, positioning ring;3, rubber washer;4, sealing rubber ring;5, positioning block;501, plugboard;502, combination plate;503, fixed screw;6, support column;601, screw hole. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0022] In order to solve the problem of high cost caused by a large amount of waste of surplus material after cutting of ductile cast iron pipe source, please refer to Figures 1-5The utility model provides an embodiment: A kind of ductile cast iron micro pipe, including double insertion tube 1, still including double sleeve 2, double sleeve 2 is located at one end of double insertion tube 1, double insertion tube 1 is hollow cylindrical structure, the outer wall of double insertion tube 1 is provided with protective layer 101, the inner wall of double insertion tube 1 is provided with inner lining 103, protective layer 101 and inner lining 103 are concrete material, the inside of protective layer 101 is arranged in reinforcing mesh 102, both ends of double sleeve 2 are provided with positioning ring 202, and the positioning ring 202 between two is provided with boss 201, boss 201 is annular structure, and boss 201 is fixed in the inside of double sleeve 2, and sealing rubber ring 4 is provided between double insertion tube 1 and double sleeve 2, and rubber washer 3 is provided between positioning ring 202 and protective layer 101.

[0023] One end of double insertion tube 1 is in contact with boss 201, and the sum of the thickness of boss 201 and the length of double insertion tube 1 is one meter, both ends of double insertion tube 1 are provided with chamfered surface, the diameter of reinforcing steel in reinforcing mesh 102 is 3mm-4mm, the mesh size is 70mm*70mm-150mm*150mm, the distance between reinforcing mesh 102 and the outer wall of double insertion tube 1 is one half to five thirds of the thickness of protective layer 101, both ends of double insertion tube 1 are provided with non-pouring area, and when needed, grouting hole can be prefabricated on the surface of pipe source, to facilitate the jacking construction of micro pipe, wherein the thickness of protective layer 101 and the size of double insertion tube 1 are matched in the range shown in table one;

[0024]

[0025] Table one

[0026] The concrete strength requirement of protective layer 101 is C30 and above, the cement used in concrete is portland cement, ordinary portland cement, slag portland cement or sulphate-resistant cement, and it is recommended to use ordinary portland cement with strength grade ≥32.5, the sand used for preparing concrete is medium-coarse sand, which can be natural sand or recycled sand, and the fineness modulus is preferably between 2.0-3.0, the concrete adopts gravel or pebble, and the particle diameter is preferably 5mm-50mm, and the maximum particle diameter of stone should not be greater than half of the wall thickness of concrete protective layer, and part of mixed materials such as fly ash and mineral powder can be used to replace part of cement in the preparation of concrete, but the proportion is not recommended to exceed 30%, and the main material ratio of concrete of protective layer 101 is shown in table two;

[0027]

[0028] Table two

[0029] Double sleeve 2 is manufactured by lost foam casting or other methods according to the corresponding caliber and target wall thickness of the outer shape size of ductile cast iron pipe socket, and the thickness of boss 201 and the size of double insertion tube 1 are matched in the range shown in table three;

[0030]

[0031] Table three

[0032] The excess material cut off during the production and processing of conventional jacking pipe is reprocessed into double jacking pipe 1, and the double jacking pipe 1 is combined with double sleeve 2, sealing rubber ring 4 and rubber ring 3 to form a meter of micro jacking pipe, thereby effectively utilizing the excess material in production and reducing production costs. The outer surface of the double jacking pipe 1 is provided with a layer of reinforced concrete protective layer 101, so that the double jacking pipe 1 has a cylindrical structure as a whole, which is helpful for subsequent jacking, and the protective layer 101 can avoid damage to the coating on the surface of the double jacking pipe 1 during jacking. The rubber ring 3 is installed between the double sleeve 2 and the protective layer 101, so that the double sleeve 2 and the protective layer 101 are not in direct contact, which can protect the integrity of the concrete structure during jacking and further reduce the use cost.

[0033] The inside of the positioning ring 202 is provided with a positioning block 5, one side of the protective layer 101 is provided with a support column 6, one end of the support column 6 is located inside the protective layer 101, the other end of the support column 6 is provided with a screw hole 601, the other end of the support column 6 extends to the inside of the positioning block 5 through the rubber ring 3, the positioning block 5 and the support column 6 are connected through the fixing screw 503, both sides of the positioning block 5 are provided with a combination plate 502, the combination plate 502 is located inside the positioning ring 202, the inside of the combination plate 502 is provided with an insertion plate 501, one end of the insertion plate 501 extends to the outside of the positioning ring 202 through the combination plate 502.

[0034] The thickness of the boss 201 and the length of the double jacking pipe 1 are one meter, so that the thickness of the boss 201 can be adjusted to adapt to double jacking pipes 1 of different lengths, ensuring that the length of the micro jacking pipe after the combination of the double jacking pipe 1 and the double sleeve 2 is at least one meter, thereby improving the utilization rate of the excess material. At the same time, during the pouring of the protective layer 101, the support column 6 is arranged on the side of the protective layer 101. Before the combination of the double jacking pipe 1 and the double sleeve 2, the positioning block 5 is connected with the support column 6 through the fixing screw 503, and then one end of the double jacking pipe 1 is inserted into the inside of the double sleeve 2. At this time, the positioning block 5 is clamped inside the positioning ring 202, and the positioning block 5 is fixed in the inside of the positioning ring 202 through the insertion plate 501, so that the double sleeve 2 is fixed at one end of the double jacking pipe 1, thereby improving the firmness of the combination of the double jacking pipe 1 and the double sleeve 2, and further improving the stability during subsequent jacking.

[0035] Working principle: the excess material cut off during the production and processing of conventional pipe is secondarily processed into double insertion pipe 1, and then the double insertion pipe 1 is combined with double bearing sleeve 2, sealing rubber ring 4 and rubber ring 3 into one-meter micro pipe, so as to effectively utilize the processing and production excess material and reduce the production cost, wherein the outer surface of the double insertion pipe 1 is provided with a layer of reinforced concrete protective layer 101, so that the double insertion pipe 1 is in a whole cylindrical structure, which is helpful for subsequent jacking, and the protective layer 101 can avoid the coating on the surface of the double insertion pipe 1 from being damaged during jacking.

[0036] It should be noted that, in this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0037] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application.

Claims

1. A spheroidal graphite cast iron micro-pipe comprising a double insertion pipe (1), characterized in that: Also include double sleeve (2), the double sleeve (2) is located in one end of double cannula (1), double cannula (1) is hollow cylindrical structure, double cannula (1) is provided with protective layer (101) on the outer wall, double cannula (1) is provided with inner lining (103) on the inner wall, protective layer (101) and inner lining (103) are concrete material, the inside of protective layer (101) is provided with steel bar net (102), both ends of double sleeve (2) are provided with positioning ring (202), the boss (201) is arranged between the two positioning rings (202), the boss (201) is annular structure, the boss (201) is fixed in the inside of double sleeve (2), the sealing rubber ring (4) is arranged between the double cannula (1) and the double sleeve (2), the rubber washer (3) is arranged between the positioning ring (202) and the protective layer (101).

2. A ductile cast iron micro-top pipe according to claim 1, characterized in that: One end of the double cannula (1) is in contact with the boss (201), the thickness of the boss (201) and the length of the double cannula (1) are one meter, and both ends of the double cannula (1) are provided with chamfered surface.

3. The ductile cast iron micro-top pipe according to claim 1, characterized in that: The diameter of the steel bar in the steel bar net (102) is at least 3mm, the mesh size is at least 70mm*70mm, and the distance between the steel bar net (102) and the outer wall of the double cannula (1) is at least half of the thickness of the protective layer (101).

4. The ductile cast iron micro-top pipe according to claim 1, characterized in that: The inside of the positioning ring (202) is provided with positioning block (5), one side of the protective layer (101) is provided with support column (6), one end of the support column (6) is located in the inside of the protective layer (101), the other end of the support column (6) is provided with screw hole (601), the other end of the support column (6) extends to the inside of the positioning block (5) through the rubber washer (3).

5. A ductile cast iron micro-top pipe according to claim 4, characterized in that: The positioning block (5) and the support column (6) are connected by fixing screw (503), both sides of the positioning block (5) are provided with combination plate (502), and the combination plate (502) is located in the inside of the positioning ring (202).

6. A ductile cast iron micro-top pipe according to claim 5, characterized in that: The inside of the combination plate (502) is provided with plug-in plate (501), one end of the plug-in plate (501) extends to the outside of the positioning ring (202) through the combination plate (502).

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