Pipe and flange mounting method

Abstract

A method for installing a pipe and a flange comprises the steps that the two ends of a to-be-measured circular pipe are each provided with a measuring device, the to-be-measured circular pipe is placed on rolling wheels of the measuring devices, the flange is placed at one end of the to-be-measured circular pipe, the end of the to-be-measured circular pipe is fixed to the flange, a baffle is attached to the outer surface of the end face of the flange, and a magnetic rolling wheel is attracted to the end face of the flange; the belt drives the round pipe to be measured and the other roller to rotate, the electronic vernier caliper measures the flatness of the end face of the flange, and spot welding is conducted on the flange and the pipe wall after measurement data meet the requirement. After the flange on one side is installed, the flange is placed on the other side of the round pipe to be measured, the distance between the flange end face subjected to spot welding and the flange end face to be subjected to spot welding is measured through the distance measuring instrument, after the distance meets the requirement, the flange hole angle is detected, and after the flange hole angle meets the requirement, spot welding is conducted on the flange. According to the invention, the structure is simple, the deviation in the measuring tape detection is avoided, the detection can be completed by one person, the digital detection is realized, and the construction efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the field of marine ship design and construction, and in particular relates to a pipe and flange installation method. Background Art

[0002] During the pipe manufacturing process, conventional inspection tools such as tape measures, spirit levels, angle rulers, and right-angle clamps are required to complete the pipe manufacturing accuracy inspection. During the inspection process, the pipe needs to be placed on a platform and inspected in a horizontal state. During the inspection process, multiple people are required to cooperate with the ruler to inspect the size. The operation process is cumbersome and the deviation is large.

[0003] The pipe manufacturing process requires the inspection of dimensions and flange end face. It is necessary to use the flange end face of the straight pipe as a reference to draw a ruler toward the other end face to detect the dimension between the two end faces. The inspection process requires the cooperation of two people. When a person draws a ruler from the outside of the pipe parallel to the center of the pipe, there is a certain thickness distance between the ruler point and the raised processing surface. During the inspection, two people are required to use a level ruler to close the flange end face and use the extended end face of the level ruler as a reference to draw the ruler for inspection. Deviations are prone to occur during actual inspection. The length dimension of the pipe must be inspected after the flange end face is met. Deviations are prone to occur during the inspection process, and rework and repair problems may occur. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a method for installing a pipe and a flange, which aims to achieve the purpose of one person being able to operate the inspection, reduce the dimensional deviation in pipe production, improve the construction efficiency, and reduce the pipe production tolerance rate. The technical solution adopted is: The invention discloses a method for installing a pipe and a flange. Flanges are fixed at both ends of a round pipe to be measured. A measuring device is provided. The measuring device comprises a supporting part and an end face detection part.

[0005] The supporting part has two upright plates with the same structure. They are connected by a connecting plate. Two rollers are fixed on the top. There is a gap between the two rollers. The plate between the two rollers is recessed downwards. The two rollers are arranged in parallel on the same horizontal plane. A motor is fixed under one of the rollers, and a belt is wound between the motor shaft and the roller shaft.

[0006] The end face detection part is equipped with a baffle, and the central axis of the baffle is provided with a main limit axis, an electronic vernier caliper, and a distance meter from bottom to top. The front ends of the electronic vernier caliper and the distance meter penetrate the baffle and are located in the same vertical plane as the baffle surface. Auxiliary limit axes are provided on both sides above the main limit axis. The main limit axis and the auxiliary limit axis pass through the vertical plate to fix the end face detection part to the support part, and there is a distance between the baffle and the vertical plate.

[0007] A bracket is arranged on one side of the top of the vertical plate, and an operation screen is fixed on the bracket. The operation screen controls the motor and the distance meter.

[0008] When in use, a measuring device is provided at each end of the circular tube to be measured. The circular tube to be measured is placed on the roller of the measuring device, a flange is placed at one end of the circular tube to be measured, the end of the circular tube to be measured is fixed to the flange, the baffle is fitted with the outer surface of the flange end face, the front end of the electronic vernier caliper is provided with a magnetic roller, the magnetic roller is adsorbed on the flange end face, the motor is started, and the belt drives one roller to rotate, thereby driving the circular tube to be measured and the other roller to rotate, the electronic vernier caliper measures the flatness of the flange end face, and the flange and the pipe wall are spot welded after the measurement data meets the requirements.

[0009] After installing the flange on one side, place the flange on the other side of the round tube to be tested, and use a distance meter to measure the distance between the end face of the flange that has been spot welded and the end face of the flange to be spot welded. After the distance reaches the requirement, check the flange hole angle. After the flange hole angle reaches the requirement, spot weld the flange.

[0010] In the above-mentioned method for installing a pipe and a flange, further, the rangefinder is fixed on the baffle through a supporting plate, and a reinforcing plate is fixed below the supporting plate.

[0011] In the above-mentioned method for installing a pipe and a flange, further, reinforcing plates are fixed on the upper and lower sides of the electronic vernier caliper.

[0012] In the above-mentioned method for installing a pipe and a flange, further, magnets are symmetrically arranged on the baffle, and the magnets are adsorbed on the end surface of the flange.

[0013] In the above-mentioned method for installing a pipe and a flange, further, the main limit axis is located directly below the center point of the distance between the two rollers.

[0014] In the above-mentioned method for installing a pipe and a flange, further, the electronic vernier caliper is provided with a display screen, and the measured data is displayed on the display screen.

[0015] The invention has a simple structure and avoids the zero point determination deviation and the line of sight deviation in measuring tape detection. One person can complete the detection and realize digital detection, thereby reducing the dimensional deviation in pipe production, improving construction efficiency, and reducing the pipe production tolerance rate. The measurement value is accurate to ±1mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the main structure of the supporting part; Figure 2 This is a schematic diagram of the main structure of the end face detection part; Figure 3 It is a schematic diagram of the side view structure of the end face detection part; Figure 4-5 It is a schematic diagram of the use of the measuring device; Among them, 1-circular tube to be measured, 2-flange, 3-vertical plate, 4-roller, 5-motor, 6-belt, 7-distance meter, 8-electronic vernier caliper, 9-baffle, 10-connecting plate, 11-magnetic roller, 13-bracket, 14-support plate, 15-reinforcement plate, 18-operation screen, 19-axis, 21-magnet, 25-secondary limit axis, 26-main limit axis. DETAILED DESCRIPTION

[0017] The present invention will be further described in conjunction with the accompanying drawings.

[0018] The invention discloses a method for installing a pipe and a flange. Flanges are fixed at both ends of a round pipe to be measured. The measuring device comprises a supporting part and an end face detection part.

[0019] like Figure 1 As shown, the supporting part has two upright plates, the two plates have the same structure and are connected by a connecting plate, two rollers are fixed on the top, there is a gap between the two rollers, the plate between the two rollers is recessed downwards, the two rollers are arranged in parallel on the same horizontal plane, a motor is fixed under one of the rollers, and a belt is wound between the motor shaft and the roller shaft.

[0020] like Figure 2 , 3 As shown, the end face detection part has a baffle, and the baffle center axis is provided with the main limit axis, electronic vernier caliper, and distance meter from bottom to top. The front end of the electronic vernier caliper and the front end of the distance meter penetrate the baffle and are located at the same level as the baffle surface. Reinforcement plates are fixed on the upper and lower sides of the electronic vernier caliper. The electronic vernier caliper has a display screen, and the measured data is displayed on the display screen. The distance meter is fixed to the baffle through a support plate, and a reinforcement plate is fixed under the support plate. Auxiliary limit axes are provided on both sides above the main limit axis. The main limit axis and the auxiliary limit axis pass through the vertical plate to fix the end face detection part to the support part. There is a gap between the baffle and the vertical plate. Magnets are symmetrically provided on the baffle, and the magnets are adsorbed on the flange end face. The main limit axis is located directly below the center point of the gap between the two rollers.

[0021] A bracket is arranged on one side of the top of the vertical plate, and an operation screen is fixed on the bracket. The operation screen controls the motor and the distance meter.

[0022] like Figure 4 , 5As shown, a measuring device is provided at each end of the circular tube to be measured. The circular tube to be measured is placed on the roller of the measuring device, a flange is placed on one side of the circular tube to be measured, the end of the circular tube to be measured is fixed to the flange, the baffle is fitted with the outer surface of the flange end face, the front end of the electronic vernier caliper is provided with a magnetic roller, the magnetic roller is adsorbed on the flange end face, the motor is started, and the belt drives one roller to rotate, thereby driving the circular tube to be measured and the other roller to rotate. During the rotation process, the electronic vernier caliper measures the flatness of the flange end face, and the flange and the pipe wall are spot welded after the measurement data meets the requirements.

[0023] After installing the flange on one side, place the flange on the other side of the round pipe to be tested, and use the distance meter to measure the distance between the end face of the flange that has been spot welded and the end face of the flange to be spot welded. The measured data is the net distance between the two flange surfaces of the pipe, that is, the actual length of the pipe. After the distance reaches the requirement, the flange hole angle is detected. After the flange hole angle reaches the requirement, the flange can be spot welded.

[0024] After spot welding, use the mobile phone remote control distance meter to measure the distance between the flange end faces. Complete the measurement and calibration of multiple precision data during the pipe manufacturing process.

[0025] A motor fixing plate is installed under the vertical plate to fix the DC motor. An output pulley is set at the output end of the DC motor. A toothed belt is set between the output pulley and the accompanying pulley on the roller. A group of rechargeable batteries is fixed on the motor base plate and connected to the motor to provide power. The start, stop and speed of the motor are controlled by the power switch.

[0026] A thicker main limit shaft is installed vertically at the center of the baffle, and two auxiliary limit shafts are installed perpendicular to the end plate surface on both sides of the end baffle. The shaft diameter should be slightly smaller than the main limit shaft. The limit shaft passes through the support structure vertical plate (the vertical plate is drilled and embedded with the axial bearing) to move axially, and the moving distance meets the distance requirement from the flange to the support structure. The three limit shafts can ensure that the end baffle will not rotate relative to the pipe flange and will only move axially. The reinforcement plate meets the stability of the support plate structure. When using, the rangefinder should be placed on the support plate and fixed by adjusting the screws. The front end face of the rangefinder is close to the end plate, and the height position of the rangefinder is within the range of the pipe hole cavity, which meets the rangefinder laser penetrating the pipe cavity to reach the flange on the other side. When the flange is positioned, press the rangefinder measurement button, the rangefinder emits the rangefinder laser, and can measure the baffle surface on the upper end face of the support system at the other end of the pipe, and measure the distance between the two sets of flange end faces of the pipe.

[0027] Press the rotation switch of the remote control, the motor drives the roller to rotate, the friction between the roller and the pipe wall drives the pipe to rotate, the pipe flange contacts the vernier system, when the flange rotates, the flatness of the flange end face can be displayed by the measurement value of the vernier detection system. After one rotation, the distance measurement at different points is recorded to determine the deviation range.

Claims

1. A method for installing a pipe and a flange, characterized in that: Flanges are fixed at both ends of the round tube to be measured, and there is a measuring device, which includes a supporting part and an end face detection part; The support part has two vertical plates, which have the same structure and are connected by a connecting plate. Two rollers are fixed on the top. There is a gap between the two rollers. The vertical plate between the two rollers is concave downward. The two rollers are arranged in parallel on the same horizontal plane. A motor is fixed under one of the rollers, and a belt is wound between the motor shaft and the roller shaft. The end face detection part is provided with a baffle, and the central axis of the baffle is provided with a main limit axis, an electronic vernier caliper, and a distance meter in sequence from bottom to top. The front ends of the electronic vernier caliper and the distance meter penetrate the baffle and are located in the same vertical plane as the baffle surface. Auxiliary limit axes are provided on both sides above the main limit axis. The main limit axis and the auxiliary limit axis pass through the vertical plate to fix the end face detection part with the support part, and there is a gap between the baffle and the vertical plate; A bracket is provided on one side of the top of the vertical plate, and an operation screen is fixed on the bracket, and the operation screen controls the motor and the distance meter; When in use, a measuring device is provided at each end of the round tube to be measured. The round tube to be measured is placed on the roller of the measuring device. A flange is placed at one end of the round tube to be measured. The end of the round tube to be measured is fixed to the flange. The baffle is fitted with the outer surface of the flange end face. The front end of the electronic vernier caliper is provided with a magnetic roller. The magnetic roller is adsorbed on the flange end face. The motor is started, and the belt drives one roller to rotate, thereby driving the round tube to be measured and the other roller to rotate. The electronic vernier caliper measures the flatness of the flange end face. After the measurement data meets the requirements, the flange and the pipe wall are spot welded. After installing the flange on one side, place the flange on the other side of the round tube to be tested, and use a distance meter to measure the distance between the end face of the flange that has been spot welded and the end face of the flange to be spot welded. After the distance reaches the requirement, check the flange hole angle. After the flange hole angle reaches the requirement, spot weld the flange.

2. A pipe and flange installation method according to claim 1, characterized in that: The rangefinder is fixed on the baffle through a supporting plate, and a reinforcing plate is fixed under the supporting plate.

3. A pipe and flange installation method according to claim 1, characterized in that: Reinforcement plates are fixed on the upper and lower sides of the electronic vernier caliper.

4. A pipe and flange installation method according to claim 1, characterized in that: Magnets are symmetrically arranged on the baffle plate, and the magnets are adsorbed on the flange end surface.

5. A pipe and flange installation method according to claim 1, characterized in that: The main limit axis is located directly below the center point of the distance between the two rollers.

6. A pipe and flange installation method according to claim 1, characterized in that: The electronic vernier caliper is provided with a display screen, and the measured data is displayed on the display screen.

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