CN111044273A

CN111044273A - Push pipe simulation pushing type test method

Info

Publication number: CN111044273A
Application number: CN201911157144.7A
Authority: CN
Inventors: 陈建华; 胡磊; 刘安强; 陈永峰; 李晓明
Original assignee: Wuhu Xinxing Ductile Iron Pipes Co Ltd
Current assignee: Wuhu Xinxing Ductile Iron Pipes Co Ltd
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2020-04-21

Abstract

The invention discloses a push pipe simulation pushing type test method, which comprises the following steps: step a, a movable workbench (5) is opened, and a pushing socket tool (4) is placed at the center of the movable workbench (5); b, hoisting the nodular cast iron push pipe (3) above the pushing socket tool (4), and inserting the socket of the nodular cast iron push pipe (3) into the pushing socket tool (4); c, moving the movable workbench (5) to a working position; d, pressing the hydraulic oil cylinder (1) downwards until the flat plate (6) is contacted with the nodular cast iron top pipe (3), and then starting to pressurize; wherein the pressurization control is realized by controlling the oil pressure of the hydraulic oil cylinder (1). The jacking pipe pushing simulation type test method is simple in structure and convenient to operate, jacking force can be accurately controlled, and test efficiency is improved.

Description

Push pipe simulation pushing type test method

Technical Field

The invention relates to a push pipe simulation pushing type test method.

Background

The jacking pipe is a trenchless tunneling type pipeline laying construction technology used for municipal construction. The method has the advantages of no influence on the surrounding environment or less influence, small construction site and low noise. But also can be deeply operated underground, which is incomparable with the advantages of digging and burying pipes.

The integrally cast nodular graphite micro jacking pipe is a one-step formed jacking pipe, the welding workload of the original jacking pipe is greatly reduced, the simulation pushing mode test mode of the original jacking pipe is a horizontal pushing mode (as shown in figure 1), and the defects are as follows: 1. the horizontal installation workload of the jacking pipe is large, and a large number of tools are needed for supporting the pipe fittings; 2. the number of hydraulic jacks used in the test is large, the operation is difficult, and the uniform jacking force in the simulation of actual construction cannot be guaranteed; 3. the jacking force can not be effectively and accurately controlled in the test process.

Therefore, it is urgently needed to provide a pipe jacking simulation pushing type test method capable of solving the technical problems.

Disclosure of Invention

The invention aims to provide a push pipe pushing simulation type test method which is simple in structure, convenient to operate, capable of accurately controlling the pushing force and improving the test efficiency.

In order to achieve the aim, the invention provides a push pipe simulation pushing type test method, which comprises the following steps:

step a, opening a movable workbench, and placing a pushing socket tool at the center of the movable workbench;

b, hoisting the nodular cast iron jacking pipe above a jacking socket tool, and inserting the socket of the nodular cast iron jacking pipe into the jacking socket tool;

step c, moving the movable workbench to a working position;

d, pressing the hydraulic oil cylinder downwards, and starting to pressurize after the hydraulic oil cylinder is lowered to the flat plate to be contacted with the top pipe of the nodular cast iron; wherein, the pressurization control is realized by controlling the oil pressure of the hydraulic oil cylinder.

Preferably, the hydraulic oil cylinder, the nodular cast iron jacking pipe and the pushing socket tool are coaxially arranged.

Preferably, the plate is secured to the hydraulic ram by a threaded connection.

Preferably, a frame type press is further arranged outside the pushing socket tool, and the hydraulic oil cylinder is installed at the top end of the frame type press.

Preferably, a plurality of columns of the frame press are provided with reinforcing ribs.

According to the technical scheme, the original horizontal test is changed into the vertical test, so that the pipe jacking device is convenient to install quickly, and the support of the pipe jacking device is cancelled. The hydraulic oil cylinder is adopted for the pushing test, a jack is not used, the pushing test is convenient and quick, and the pushing test can be operated by one key; the pushing pressure can be calculated through the diameter of the oil cylinder and the oil pressure, and the required pushing force can be accurately controlled by controlling the oil pressure; the operation is convenient, and the operator can operate the whole process by one person.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic diagram of an original pipe jacking simulation pushing type test mode;

FIG. 2 is a schematic diagram of a pipe jacking simulation pushing type test method provided by the invention.

Description of the reference numerals

1-hydraulic cylinder 2-frame type press

3-nodular cast iron pipe jacking 4-pushing socket tool

5-moving table 6-plate

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

In the present invention, unless otherwise specified, the directional words "upper, lower, inner, outer" and the like included in the terms merely represent the orientation of the terms in a conventional use state or are colloquially understood by those skilled in the art, and should not be construed as limiting the terms.

Referring to fig. 2, the invention provides a push pipe simulation pushing type test method, which comprises the following steps:

step a, opening a movable workbench 5, and placing a pushing socket tool 4 at the center of the movable workbench 5;

b, hoisting the nodular cast iron push pipe 3 to the position above the pushing socket tool 4, and inserting the socket of the nodular cast iron push pipe 3 into the pushing socket tool 4;

step c, moving the movable workbench 5 to a working position;

d, pressing the hydraulic oil cylinder 1 downwards until the flat plate 6 is contacted with the nodular cast iron top pipe 3, and then starting to pressurize; wherein the pressurization control is performed by controlling the oil pressure of the hydraulic cylinder 1.

In the embodiment, in order to prevent the hydraulic oil cylinder 1 from deviating in the direction of applying pressure so as to influence the accuracy of test data, preferably, the hydraulic oil cylinder 1, the nodular cast iron top pipe 3 and the pushing socket tool 4 are coaxially arranged.

In order to facilitate quick disassembly and quick assembly and save test time, the flat plate 6 is preferably fastened to the hydraulic oil cylinder 1 through threaded connection.

In addition, in order to optimize the operation structure of the push pipe simulation pushing type test method, a frame type press 2 is preferably arranged outside the pushing socket tool 4, and the hydraulic oil cylinder 1 is installed at the top end of the frame type press 2.

In order to further improve the mechanical strength of the frame type press 2 and ensure the stability of the pipe jacking simulation pushing type test process, it is preferable that a plurality of upright columns of the frame type press 2 are provided with reinforcing ribs.

Through above-mentioned technical scheme, change original horizontal test into vertical test, make things convenient for the push pipe to install fast, cancel the push pipe and support. The hydraulic oil cylinder is adopted for the pushing test, a jack is not used, the pushing test is convenient and quick, and the pushing test can be operated by one key; the pushing pressure can be calculated through the diameter of the oil cylinder and the oil pressure, and the required pushing force can be accurately controlled by controlling the oil pressure; the operation is convenient, and the operator can operate the whole process by one person.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.

It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.

In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.

Claims

1. A push pipe simulation pushing type test method is characterized by comprising the following steps:

step a, a movable workbench (5) is opened, and a pushing socket tool (4) is placed at the center of the movable workbench (5);

b, hoisting the nodular cast iron push pipe (3) above the pushing socket tool (4), and inserting the socket of the nodular cast iron push pipe (3) into the pushing socket tool (4);

c, moving the movable workbench (5) to a working position;

d, pressing the hydraulic oil cylinder (1) downwards until the flat plate (6) is contacted with the nodular cast iron top pipe (3), and then starting to pressurize; wherein the pressurization control is realized by controlling the oil pressure of the hydraulic oil cylinder (1).

2. The push pipe simulated pushing type test method according to claim 1, wherein the hydraulic oil cylinder (1), the nodular cast iron push pipe (3) and the pushing socket tool (4) are coaxially arranged.

3. The pipe jacking simulated jacking type testing method of claim 1, wherein the flat plate (6) is fastened to the hydraulic cylinder (1) by a threaded connection.

4. The pipe jacking simulated jacking type test method according to claim 1, wherein a frame type press (2) is further covered outside the jacking socket tool (4), and the hydraulic oil cylinder (1) is installed at the top end of the frame type press (2).

5. The pipe-jacking simulated jacking type testing method as claimed in claim 4, wherein a plurality of columns of the frame press (2) are provided with reinforcing ribs.