CN110778787A

CN110778787A - Hoop type pipe joint fixer

Info

Publication number: CN110778787A
Application number: CN201910982643.3A
Authority: CN
Inventors: 汤晓俊; 王涛; 熊菲; 滕海渤
Original assignee: Shanghai Foundation Engineering Group Co Ltd
Current assignee: Shanghai Foundation Engineering Group Co Ltd
Priority date: 2019-10-16
Filing date: 2019-10-16
Publication date: 2020-02-11

Abstract

The invention relates to a hoop type pipe joint fixer, which comprises a base, supporting legs and a hoop mechanism, wherein the hoop mechanism is composed of two hoop sheets, the lower ends of the two hoop sheets are respectively arranged on the base through the supporting legs, the hoop sheets are hinged and connected with the supporting legs through negative pin shafts, the hoop sheets can rotate around the pin shafts, the upper ends of the two hoop sheets are respectively connected with a radial positioning power mechanism through connecting seats, the radial positioning power mechanism is composed of a hydraulic system and a hydraulic jack, the hydraulic system drives the hydraulic jack to extend/contract to drive the two hoop sheets to clamp or loosen a pipe joint, and the hoop mechanism is used for restricting the radial freedom degree of the pipe joint and playing a role in fixing the pipe joint. The invention can solve the problem that the jacking pipe joint is floated, retreated and displaced due to stress under the condition of early jacking of the jacking pipe or reverse flowing water, so that the subsequent pipe joints are difficult to butt joint and jack. Meanwhile, the temporary pipe joint fixing required by construction can be completed.

Description

Hoop type pipe joint fixer

Technical Field

The invention relates to a pipe joint fixing device in pipe jacking construction, in particular to a hoop type pipe joint fixer for two pipe joints.

Background

Pipe jacking construction is a trenchless construction method. The pipe jacking construction is that in a working well, a heading machine at the head is responsible for destroying soil on the front side of a pipeline and discharging the soil through a slurry pipeline, and by means of jacking force generated by rear jacking equipment, the friction force between a pipe joint and surrounding soil is overcome, and the pipe joint is jacked into the soil according to a designed axis. After one pipe joint is jacked into the soil layer, the second pipe joint is jacked continuously.

However, in actual construction, various working conditions are encountered, such as:

1. in the process of splicing the pipes after the pipe joints are placed in an underground launching rack, the front-section pipe joints are often retreated due to the reasons of front soil pressure and the like, so that the splicing difficulty of the rear-section pipe joints is increased;

2. the requirement on the socket precision of the pipe joints of the jacking pipes is increasingly improved, and small displacement of the front pipe joints often influences the pipe splicing precision in the pipe splicing process;

3. when quality problems (such as the sealing strips are extruded and deformed) are found after the pipe joints are assembled, the pipe joints need to be pulled down and then assembled again, the front pipe joints need to be temporarily fixed, and the rear pipe joints can be conveniently pulled out.

Based on the above working conditions, a pipe joint fixing device during pipe jacking construction needs to be designed.

Disclosure of Invention

The invention provides a hoop type pipe joint fixer. By using the clamp principle, the freedom degree of the pipe joint is restrained from two mechanical directions of radial direction and axial direction, and the purpose of fixing the pipe joint is realized through the clamping or loosening action of the fixer.

In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides a hoop formula tube coupling fixer, includes base, supporting leg, hoop mechanism comprises two hoop pieces, and two hoop piece lower extremes are installed on the base through the supporting leg respectively, and through the articulated connection of burden round pin axle between hoop piece and the supporting leg, and the hoop piece can rotate around the round pin axle, and two hoop piece upper ends connect radial positioning power unit through the connecting seat respectively, radial positioning power unit comprises hydraulic system and hydraulic jack, and "stretch/contract" action of hydraulic system drive hydraulic jack drives two hoop pieces and carries out "clamp" or "loosen to the tube coupling for restrain the radial degree of freedom of tube coupling, play the effect of fixed tube coupling.

Further, the base is fixedly connected with the bottom hole plane in a welding or bolt mode.

Furthermore, the inner wall of the hoop sheet is provided with a lining rubber pad for protecting the pipe joint and playing a role in buffering.

Furthermore, the lifting lugs on the middle part of the outer walls of the two hoop sheets and the connecting seat at the upper end are respectively provided with an axial positioning mechanism.

Furthermore, the axial positioning mechanism is composed of a nut, a screw rod and a fixing plate, the fixing plate is connected with the lifting lug or the connecting seat through the screw rod and the nut, and the fixing plate can be propped against the front plane through adjusting the nut to restrain the axial freedom degree of the pipe joint.

Further, when the hoop mechanism clamps the pipe joint through fixing two hoop sheets, the hoop sheets are fixed with the supporting legs through the positioning pins, a fixing safety effect is achieved, and accidents caused when the radial positioning power mechanism breaks down can be avoided.

The invention has the beneficial effects that:

can be used in the following special working conditions

1. When the initial tunneling is carried out, the underground water pressure is larger than the friction force between the soil body and the pipe joint, and the pipe joint can be fixed by the method and can be prevented from backing up.

2. When no soil body is arranged on the front surface in the jacking direction, the pipe joint can be supported to increase the frictional resistance or reverse water flow exists, the pipe joint can be fixed by the device, and the pipe joint is prevented from backing up.

Second, the benefits brought

1. The butt joint working efficiency of the pipe joints can be greatly improved.

2. The construction safety is improved, the pipe joint retreating phenomenon caused by special working conditions can be effectively prevented, and accidents are prevented.

3. The invention is basically made of steel structure, so the manufacturing cost and the failure rate are both low, and the invention can be used repeatedly.

4. The operation and maintenance are simple, and the hydraulic jack can be remotely controlled through the PLC, so that the working environment of constructors is improved.

Drawings

FIG. 1 is a schematic perspective view of a hoop type pipe joint holder configuration of the present invention;

figure 2 is an elevation view of a hoop type pipe section retainer construction of the present invention.

Detailed Description

The invention will be further described with reference to the accompanying drawings.

As shown in fig. 1 and 2, a hoop type pipe joint fixer comprises a base 1, a support leg 2, a hoop mechanism 3, a radial positioning power mechanism 6 and an axial positioning mechanism 5.

The hoop mechanism 3 is composed of two hoop sheets, the lower ends of the two hoop sheets are respectively installed on the base 1 through the supporting legs 2, the hoop sheets are hinged to the supporting legs 3 through pin shafts, the hoop sheets can rotate around the pin shafts, and the upper ends of the two hoop sheets are respectively connected with the radial positioning power mechanism 6 through the connecting seats 8.

The radial positioning power mechanism 6 consists of a hydraulic system and a hydraulic jack, the hydraulic system drives the hydraulic jack to extend/contract, and drives the two hoop sheets to clamp or loosen the pipe joint, so as to restrict the radial freedom degree of the pipe joint and play a role in fixing the pipe joint.

The base 1 is fixedly connected with the bottom hole plane through welding or a bolt mode. The inner wall of the hoop sheet is provided with a lining rubber pad 4 for protecting the pipe joint and playing a role of buffering. The lifting lugs 7 on the middle parts of the outer walls of the two hoop sheets and the connecting seat 8 at the upper end are respectively provided with an axial positioning mechanism 5.

The axial positioning mechanism 5 consists of a nut, a screw rod and a fixing plate, the fixing plate is connected with the lifting lug or the connecting seat through the screw rod and the nut, and the fixing plate can prop against the front plane through adjusting the nut to restrain the axial freedom degree of the pipe joint.

After the hoop mechanism clamps the pipe section through fixing the two hoop sheets, the hoop sheets and the supporting legs are fixed through the positioning pins, the fixing and safety effects are achieved, and accidents caused when the radial positioning power mechanism breaks down can be avoided.

(1) Base: and is fixed with the bottom hole plane through welding or a bolt mode.

(2) Supporting legs: mainly plays a role in supporting the hoop mechanism. The "clamping" or "unclamping" path of movement of the hoop mechanism is constrained in its degrees of freedom by shafts on the support legs.

(3) Positioning pins: when the hoop mechanism reaches the clamping position or the loosening position, the hoop mechanism can be fixed by the positioning pin, so that the physical safety function is achieved, and accidents caused when the radial positioning power mechanism breaks down are avoided.

(4) A hoop mechanism: the pipe joint fixing device mainly plays a role in fixing the pipe joint which is already jacked up.

(5) Inner lining: the rubber pipe joint is made of rubber materials and aims to protect the pipe joint and play a role in buffering.

(6) Lifting lugs: the mechanism is easy to hoist.

(7) Radial positioning power mechanism: consists of a hydraulic system and a jack. Through the 'stretching/contracting' action of the jack, the radial freedom degree of the pipe joint is restrained, and the function of fixing the pipe joint is achieved.

(8) Axial positioning mechanism: consists of a nut, a screw rod and a fixing plate. By adjusting the nut and the nut, the mechanism can prop against the front plane to restrain the axial freedom degree of the pipe joint.

Claims

1. The utility model provides a hoop formula tube coupling fixer, includes base, supporting leg, hoop mechanism, its characterized in that: the hoop mechanism is composed of two hoop sheets, the lower ends of the two hoop sheets are installed on the base through supporting legs respectively, the hoop sheets are hinged to the supporting legs through negative pin shafts, the hoop sheets can rotate around the pin shafts, the upper ends of the two hoop sheets are connected with the radial positioning power mechanism through connecting seats respectively, the radial positioning power mechanism is composed of a hydraulic system and a hydraulic jack, the hydraulic system drives the hydraulic jack to stretch/contract, the two hoop sheets are driven to clamp or loosen the pipe joint, the radial freedom degree of the pipe joint is restrained, and the effect of fixing the pipe joint is achieved.

2. The hoop-style pipe joint holder of claim 1, wherein: the base is fixedly connected with the bottom hole plane in a welding or bolt mode.

3. The hoop-style pipe joint holder of claim 1, wherein: and the inner wall of the hoop sheet is provided with a lining rubber pad for protecting the pipe joints and playing a role in buffering.

4. The hoop-style pipe joint holder of claim 1, wherein: and the lifting lugs on the middle parts of the outer walls of the two hoop sheets and the connecting seat at the upper end are respectively provided with an axial positioning mechanism.

5. The hoop-style pipe joint holder of claim 4, wherein: the axial positioning mechanism is composed of a nut, a screw rod and a fixing plate, the fixing plate is connected with the lifting lug or the connecting seat through the screw rod and the nut, and the fixing plate can prop against the front plane through adjusting the nut to restrain the axial freedom degree of the pipe joint.

6. A hoop style pipe joint holder as claimed in any one of claims 1 to 5, wherein: when the hoop mechanism clamps the pipe section through fixing the two hoop sheets, the hoop sheets and the supporting legs are fixed through the positioning pins, a fixing safety effect is achieved, and accidents caused when a radial positioning power mechanism breaks down can be avoided.