CN215562649U

CN215562649U - Centering and limiting device for grouting steel pipe

Info

Publication number: CN215562649U
Application number: CN202120911064.2U
Authority: CN
Inventors: 顾宏; 徐又新; 王笑; 王克文; 陈晖�; 乔意; 范多; 恽晴飞; 曾龙
Original assignee: Shanghai Changkai Geotechnical Engineering Co Ltd
Current assignee: Shanghai Changkai Geotechnical Engineering Co Ltd
Priority date: 2021-04-29
Filing date: 2021-04-29
Publication date: 2022-01-18
Anticipated expiration: 2031-04-29

Abstract

The utility model discloses a centering and limiting device for a grouting steel pipe, which relates to the steel pipe and the grouting pipe arranged in the steel pipe and is characterized in that the centering and limiting device comprises a locking base, support legs and guide wheels, wherein the locking base is sleeved and fixed on the outer wall surface of the grouting pipe, a plurality of support legs extending along the radial direction are distributed on the locking base at intervals, the guide wheels are arranged at the outer end parts of the support legs, and the guide wheels are tightly attached to the inner wall surface of the steel pipe. The utility model has the advantages that: the centering and limiting device is simple in structure, can perform centering and limiting on the grouting pipe in the process that the grouting pipe goes deep into the steel pipe, and can slide along the depth direction of the steel pipe along with the grouting pipe.

Description

Centering and limiting device for grouting steel pipe

Technical Field

The utility model relates to a grouting device, in particular to a centering and limiting device for a grouting steel pipe.

Background

The slant grouting steel pipe props as the bearing structure of foundation ditch engineering, has not only increased the interior operating space of hole, has also reduced the supporting system cost, has good application and spreading value. In order to effectively improve the bearing capacity of the diagonal bracing steel pipe, a pre-buried grouting steel pipe and a single (double) air bag are generally adopted for grouting after a constraint bin is arranged at the corresponding position of the end part of the diagonal bracing steel pipe, or a grouting opening is arranged after the top of a port is plugged for direct grouting and the like.

When inserting the slip casting pipe to slant slip casting steel pipe in, need use centering guider, ensure that the slip casting pipe can keep the relation of coaxial setting with slant slip casting steel pipe, but present centering guider all sets up the upper end mouth of pipe position at slant slip casting steel pipe, can only ensure the coaxial of slip casting pipe when getting into the steel pipe, can't ensure the axiality of slip casting pipe after inserting to the steel pipe inside. Therefore, a centering and limiting device capable of keeping the coaxial degree of the grouting pipe and the steel pipe at all times is needed by the person skilled in the art.

Disclosure of Invention

The utility model aims to provide a centering and limiting device for a grouting steel pipe according to the defects of the prior art, wherein the centering and limiting device is tightly connected with the outer wall of the grouting pipe through a locking base, and realizes centering and limiting of the grouting pipe through the fact that supporting legs with guide wheels extending outwards on the locking base cling to the inner wall surface of the steel pipe and slide.

The purpose of the utility model is realized by the following technical scheme:

the centering and limiting device is characterized by comprising a locking base, supporting legs and guide wheels, wherein the locking base is sleeved and fixed on the outer wall surface of the grouting pipe, a plurality of radially extending supporting legs are distributed on the locking base at intervals, the guide wheels are mounted at the outer end parts of the supporting legs, and the guide wheels are tightly attached to the inner wall surface of the steel pipe.

The grouting pipe is provided with at least two centering and limiting devices which are respectively positioned at two end parts of the grouting pipe.

The grouting pipe is characterized in that a through hole is formed in the locking base, the locking base is sleeved on the outer wall surface of the grouting pipe through the through hole, a notch is formed in the through hole and extends from the inner wall surface of the through hole to the outer wall surface of the locking base, and through holes are formed in two sides of the notch and locked through screws so that the locking base is fixed with the outer wall surface of the grouting pipe.

At least 3 support legs are arranged on the locking base.

A plurality of bolt holes are distributed on the outer edge part of the upper surface of the locking base at intervals, and the end parts of the support legs are installed and fixed in an aligned mode with the bolt holes of the locking base through bolts.

The leading wheel is vertical setting.

The utility model has the advantages that: the centering and limiting device is simple in structure, can perform centering and limiting on the grouting pipe in the process that the grouting pipe goes deep into the steel pipe, and can slide along the depth direction of the steel pipe along with the grouting pipe.

Drawings

FIG. 1 is a schematic structural view of a centering and limiting device installed on a grouting pipe according to the present invention;

FIG. 2 is a partially enlarged schematic view of the centering and limiting device according to the present invention;

fig. 3 is a top view of the locking base of the present invention.

Detailed Description

The features of the present invention and other related features are described in further detail below by way of example in conjunction with the following drawings to facilitate understanding by those skilled in the art:

referring to fig. 1-3, the symbols in the figures are: the grouting limiting and pressing device comprises a grouting limiting and pressing device 1, a grouting pipe 2, a steel pipe 3, a centering limiting device 4, a locking base 5, support legs 6, a guide wheel 7, a spring group 8, a bolt 9 and a notch 10.

Example (b): as shown in fig. 1, 2 and 3, the embodiment specifically relates to a centering and limiting device for a grouting steel pipe, wherein the centering and limiting device 4 is fixed on the outer wall surface of the grouting pipe 2 in a sleeving manner and performs centering and guiding on the grouting pipe 2 in the steel pipe 3, so as to ensure that the grouting pipe 2 can be centered and limited all the time when extending into the steel pipe 3.

As shown in fig. 1 to 3, at least two centering and limiting devices 4 are provided on the grouting pipe 2, and are respectively fixed to the upper end portion and the lower end portion of the grouting pipe 2 in a sleeved manner, so as to ensure centering and limiting of the entire grouting pipe 2, and if the number of the centering and limiting devices 4 exceeds two, the centering and limiting devices may be provided at intervals along the length direction of the grouting pipe 2.

As shown in fig. 1-3, the centering and limiting device 4 mainly includes a locking base 5, a supporting leg 6 and a guide wheel 7, a through hole is formed in the center of the locking base 5, the through hole is used for enabling the locking base 5 to be fixed on the outer wall surface of the grouting pipe 2 in a sleeved mode, a notch 10 is formed in the locking base 5, the notch 10 extends to the outer wall surface of the locking base 5 from the inner wall of the through hole, the locking base 5 has certain elasticity, through holes are formed in two sides of the notch 10, and a screw rod is arranged in the through holes in a pulling mode, so that the locking base 5 can be tightly connected with the outer wall surface of the grouting pipe 2.

As shown in fig. 1-3, four sets of bolt holes are formed at intervals around the outer periphery of the upper surface of the locking base 5, and accordingly, the legs 6 are correspondingly mounted at the positions of the bolt holes and fastened by bolts 9, so that the legs 6 are fixedly connected with the locking base 5. Each stabilizer blade 6 is respectively along steel pipe 3's radial setting, is fixed with leading wheel 7 at the outer tip of stabilizer blade 6, thereby leading wheel 7 comprises a plurality of pulleys and along vertical arrangement make locking base 5 can be along vertical removal in steel pipe 3, and need explain that, be provided with spring assembly 8 between the outer tip of stabilizer blade 6 and leading wheel 7, can make leading wheel 7 all the time with the internal face in close contact with of steel pipe 3 under the effect of compression resilience power through the setting of spring assembly 8.

As shown in fig. 1, after the centering and limiting device 4 is installed on the grouting pipe 2, a grouting limiting and pressing device 1 is further installed at the upper end of the grouting pipe 2 and is fixedly connected with the steel pipe 3, so as to prevent the grouting pipe 2 from being separated from the steel pipe 3 by a recoil force generated during grouting of the grouting pipe 2.

The beneficial effect of this embodiment does: the centering and limiting device is simple in structure, can perform centering and limiting on the grouting pipe in the process that the grouting pipe goes deep into the steel pipe, and can slide along the depth direction of the steel pipe along with the grouting pipe.

Claims

1. The centering and limiting device is characterized by comprising a locking base, supporting legs and guide wheels, wherein the locking base is sleeved and fixed on the outer wall surface of the grouting pipe, a plurality of radially extending supporting legs are distributed on the locking base at intervals, the guide wheels are mounted at the outer end parts of the supporting legs, and the guide wheels are tightly attached to the inner wall surface of the steel pipe.

2. The centering and limiting device for the steel pipe to be grouted according to claim 1, wherein at least two centering and limiting devices are mounted on the grouting pipe and are respectively located at two ends of the grouting pipe.

3. The centering and limiting device for the grouting steel pipe as claimed in claim 1, wherein the locking base is provided with a through hole, the locking base is sleeved on the outer wall surface of the grouting pipe through the through hole, the through hole is provided with a notch, the notch extends from the inner wall surface of the through hole to the outer wall surface of the locking base, and two sides of the notch are provided with through holes and are locked through screws so that the locking base is fixed with the outer wall surface of the grouting pipe.

4. The centering and limiting device for the grouting steel pipe as claimed in claim 1, wherein at least 3 support legs are arranged on the locking base.

5. The centering and limiting device for the grouting steel pipe as claimed in claim 4, wherein a plurality of bolt holes are distributed at intervals on the outer edge part of the upper surface of the locking base, and the end part of the supporting leg is fixedly installed in alignment with the bolt holes of the locking base through bolts.

6. The centering and limiting device for the grouting steel pipe as claimed in claim 1, wherein the guide wheels are vertically arranged.