CN204477569U - For the instrument of pipe pressurized connection - Google Patents

Abstract

The utility model discloses a tool used for pipeline connection under pressure, which comprises two parts: a hole-opening device and a main pipe welding connection part, wherein: the hole-opening device includes a drill pipe, a drill bit and a set of cutters arranged on the top of the drill pipe, and supports the The main body of the function is the wrench set at the tail of the drill pipe, the pull rod, the top plate, the copper tile, the press nut, the sealing ring, the screw and the handle; With flange and gasket. The utility model is a tool used for pipeline connection under pressure, which can carry out branch pipe connection under the condition of normal production operation without stopping the conveying of the main pipe medium, without reducing the pressure, without dispersing, purging, replacing, etc. The tool is convenient, fast, safe and reliable. It does not affect normal production, is environmentally friendly and energy-saving, has low construction costs and low labor intensity, but is highly technical, so careful arrangements must be made during the operation.

Description

Tools for connecting pipes under pressure

technical field

The utility model relates to an interface device for connecting a pipeline with a main line, more specifically, the utility model is a device for opening holes with pressure on-line.

Background technique

At present, the country attaches great importance to energy conservation and emission reduction, especially the rational use of water, gas and other process pipelines in steel plants. Especially the use of blast furnace gas, so the pipeline is often rebuilt and expanded, and the joint work of gas, natural gas and other pipelines is often carried out in the maintenance project. The old method is usually to shut down the blast furnace, close the main blind plate valve of the gas pipeline, purge the pipeline with nitrogen, and open the holes and contacts after passing the inspection of each emission point, and then replace the gas supply, which not only affects normal production but also has nitrogen suffocation, Residual gas poisoning and other hazards. Moreover, the gas system is relatively large, and a large amount of gas and manpower and material resources are wasted for purging and replacement, and the discharged gas affects the surrounding environment.

Utility model content

In order to solve the problems existing in the prior art, the utility model provides a tool for pipeline connection under pressure, which overcomes the problems in the prior art that the joints of the pipeline affect normal production and have potential safety hazards.

The technical solution of the utility model is: a tool for pipeline connection under pressure, including two parts: opening equipment and a main pipe welding connection part, wherein:

The drilling equipment includes the drill pipe, the drill bit and the set of cutters set on the top of the drill pipe, the supporting body, the wrench set at the end of the drill pipe, the pull rod, the top plate, the copper tile, the press nut, the sealing ring, the screw and the plate handle ;

The welded connecting part of the main pipe includes a connecting pipe, a valve is arranged on the connecting pipe, and a flange and a sealing gasket are arranged between the valve and the connecting pipe.

The base of the opening device and the bottom of the valve are provided with supporting parts.

The beneficial effect of the utility model is: the utility model is used for the tool for pipeline connection under pressure, which can not stop conveying the main pipe medium, not reduce the pressure, not carry out dispersal, purging, replacement, etc., and ensure the normal operation of the production. connect. The process is convenient, fast, safe, and reliable. It does not affect normal production, is environmentally friendly and energy-saving, has low construction costs and low labor intensity, but is highly technical, so careful arrangements must be made during the operation.

Description of drawings

Fig. 1 is the opening device of the utility model for the tool of pipeline connection under pressure;

Fig. 2 is a structural schematic diagram of the utility model for the welding joint of the main pipe of the tool used for pipeline connection under pressure;

Fig. 3 is the sectional view of A-A plane among Fig. 2;

Among them, 1-drill bit; 2-cutter set; 3-drill pipe; 4-main body; 5-tie rod; 6-copper tile; 12-top plate; 13-screw; 14-wrench; 15-director;

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in the figure, the entire online opening device is divided into two parts: the opening equipment and the main pipe welding connection part.

1. The components of the drilling equipment include: the components of the drilling machine include: the drill bit is used for drilling, positioning, and taking out the blocking plate; The supporting parts are rigidly connected; the pull rod and the top plate play the role of force transmission balance; the copper tile plays the role of slewing support; the pressure nut and the sealing ring prevent air leakage; the wrench is the driving device; the screw and the plate handle play the role of feeding. Figure 1.

2. The welded connection part of the main pipe includes: the diameter of the welded pipe and the branch pipe are the same, and it is welded to the main pipe in advance; the function of opening the valve is to close the medium after drilling, which is convenient for the later connection construction. The holes are matched with each other, the seal is good, and the length of the connecting pipe can ensure the amount of cutting. Figure 2.

Construction sequence: construction preparation-working platform erection-connection flange installation-valve installation-opening equipment installation-drilling and cutting-valve closing-opening equipment removal-flange blind plate installation-working platform removal.

1. Construction preparation

The danger of hot work in pressurized gas pipelines is obvious, and major safety accidents such as poisoning, fire, and explosion will easily occur if the filter is not properly checked. Therefore, construction preparations must be sufficient and meticulous, with special attention to safety measures in place and adequate technical preparations.

1) All staff shall clarify the purpose of the entire operation, and open holes and connect pipes at designated positions on the gas main pipe.

2) All staff shall clarify the content of the entire operation, weld the joints and open holes on the main pipeline to ensure the safety of people and objects during the entire operation.

3) All staff are aware of the impact and hazards of the entire operation, which are prone to poisoning, fire, and explosion. There should be no open flames or flammable materials within 10 meters around. Set up a cordon within 40 meters around.

4) Formulate a detailed technical plan and submit it to relevant departments for approval, and formulate an emergency plan.

5) Prepare connecting pipes, valves, special equipment and tools for drilling. Master the performance and operation method of the machine tool.

6) Set up the operating platform and its running and jumping.

7) Complete fire-fighting equipment, water and electricity.

8) The connecting pipe must be tightly sealed on the test piece, and the welder must hold a certificate to work, be clear about the pipe wall, and have an appropriate current.

9) Establish a unified command system and smooth information.

10) Quality control drilling, reaming, welding, drill operation, ultrasonic inspection after welding.

11) When entering the factory area, you should abide by the rules and regulations of the factory, and you should wear safety helmets, gloves and other protective equipment when entering the construction site.

12) Workers at heights must wear safety ropes and tool bags. The delivery tools are not allowed to be thrown, and should be delivered with ropes. Safety tools (safety ropes, scaffolding boards, ladders, etc.) should be checked before climbing to ensure that they are safe before use.

13) In the construction of flammable and explosive gas pipelines, no open flames should be followed. Water should be used when drilling or cutting pipelines, and fire extinguishing equipment should be equipped. Effective anti-virus equipment should be worn for toxic and harmful gas operations.

14) The construction equipment, tools, and materials should be placed in an orderly manner, and obvious warning signs should be set up in the operation area to ensure the safety of both parties and other personnel and prevent accidental injuries.

15) Precautions should be taken against foreseeable potential safety hazards to ensure that construction equipment and other operating equipment on site are in good condition.

2. Setting up of working platform

The platform must be set up to ensure safety and reliability. The working surface is 3X3 meters, with maintenance railings, safety ropes, running and jumping to prevent accidents and rescue passages. The upper surface of the platform is about 1000 meters away from the center of the pipeline. The bearing capacity is 2000KG, ensuring the installation and operation space of valves and opening equipment.

3. Take over flange installation

To take over the pipe, first determine the length according to the drilling equipment in Figure 1, grind the tee port on the prefabricated pipe, and then weld it with the main pipe. The connecting pipe meets the requirements of levelness and verticality of the end face, and reinforcement ribs are added after welding.

4. Valve installation

The valve is installed on the connecting pipe. The sealing performance of the installed valve should be good. The valve meets the pressure requirements of the pipeline. The connecting pipe and the valve are subjected to a pressure test together. The test pressure is the working pressure of the pipeline. A gasket is added between the valve and the pipe, and the bolt and gasket connection meets the installation requirements of the gas pipeline. (Valve in Figure 2)

5. The drilling machine equipment is installed on the valve (the main body flange in Figure 1 is connected to the valve flange in Figure 2)

1) Check the safety and reliability of the drilling equipment before installation;

2) Check whether the equipment complies with the shape required for the drilling requirements;

3) Installation of drilling equipment First, install the drill pipe into the main body, and then firmly connect the drilling kit, drill bit, etc., and install the gasket. Check the drill pipe, it should rotate flexibly in the drill body without jamming.

4) The installation support point of the drilling equipment is mainly borne by the main pipe and the connecting pipe. In order to ensure the installation accuracy of the drilling equipment, support is added to the base of the drilling machine and the bottom of the valve to stabilize the drilling machine; the rotation center line of the drilling tool should be It is concentric with the pipe flange pipe, jog after installation to confirm whether the concentricity meets the requirements, and there must be no jamming between the hole cutter and the inner surface of the pipe.

6. Drilling, closing of valves, removal of drilling equipment

1) On-site drilling and pinning workers should pass the national assessment and should hold a certificate to work.

2) Construction under pressure, so the ignition point of the medium in the pipeline should be known during the construction process to control the cutting heat generated during the construction process;

3) Fully open the valve, and fill the connecting pipe, valve and drill body with water through the water injection hole of the drill body. This will play a cooling and lubricating role, and more importantly, isolate the coke oven gas from the air to avoid potential fire hazards.

4) Drilling operators carry toxic gas alarms with them, and check the working environment at any time, and take proper measures in time when leakage is found. In case of emergency, quickly evacuate the scene through the safe escape route to ensure personal safety.

5) Drive the drill pipe to rotate clockwise, and at the same time rotate the feed screw, and slowly feed the knife against the drill pipe. After complete drilling, the cut pipe wall disc enters the set of cutters, and the drilling work is completed.

6) During the cutting process, because the processing surface is a curved surface, the cutting process is an intermittent cutting method, so the force of the tool contacting the processing surface must be uniform to avoid hitting the knife. The benefit of intermittent processing is that the tool can cool down during the process;

7) Pull out the drill pipe, pull out the set cutter from the main body of the drill, close the valve, remove the hole drill, and complete the drilling operation.

8) During the dismantling process of the equipment, the cutter is first removed, and then the equipment is dismantled;

7. Add a blind plate to prevent leakage and remove the working platform.

The utility model has been schematically described above with reference to the accompanying drawings and embodiments, and the description is not limiting. Those of ordinary skill in the art should understand that in practical applications, some changes may occur in the arrangement of the components in the present invention, and other people may also make various forms of similar designs under their inspiration. It should be pointed out that, as long as they do not deviate from the design purpose of the present utility model, all obvious changes and similar designs are included in the protection scope of the present utility model.

Claims (2)

1. A tool for pipeline connection under pressure, characterized in that it includes two parts: a hole opening device and a main pipe welding connection part, wherein: The drilling equipment includes the drill pipe, the drill bit and the set of cutters set on the top of the drill pipe, the supporting body, the wrench set at the end of the drill pipe, the pull rod, the top plate, the copper tile, the press nut, the sealing ring, the screw and the plate handle ; The welded connecting part of the main pipe includes a connecting pipe, a valve is arranged on the connecting pipe, and a flange and a sealing gasket are arranged between the valve and the connecting pipe. 2. The tool for connecting pipelines under pressure according to claim 1, characterized in that, the base of the opening device and the bottom of the valve are provided with supporting parts.