Device and method for detecting influence of welding residual stress of steel branch pipe through water pressure

Abstract

The invention relates to the technical field of steel bifurcated pipe detection, in particular to a device and method for detecting the influence of welding residual stress of a steel bifurcated pipe through water pressure, and the device comprises a main pipe supporting base and a side pipe adjusting supporting base, a steel bifurcated pipe is arranged on the upper side face of the main pipe supporting base, and an ultrasonic stress detector is arranged at the welding position of the outer side face of the steel bifurcated pipe; a main pipe sealing head is slidably arranged on the main pipe supporting base, and a side pipe sealing mechanism is slidably arranged on the side pipe adjusting supporting base. A certain angle is adjusted through the side pipe adjusting supporting base so as to adapt to steel branch pipes with different angles, the use range is widened, the use flexibility is improved, a main pipe sealing head seals a main pipe of the steel branch pipe, a side pipe sealing mechanism seals a side pipe of the steel branch pipe, and a high-pressure metal water inlet pipe injects water into the steel branch pipe; the ultrasonic stress detector is used for detection, the structure is simple, and the detection efficiency is greatly improved.

Description

Technical Field

[0001] The present invention relates to a device and method for detecting residual stress effects of welding of a steel bifurcated pipe, in particular to a device and method for detecting residual stress effects of welding of a steel bifurcated pipe using water pressure, and belongs to the technical field of steel bifurcated pipe detection. Background Art

[0002] The bifurcation angle of a steel bifurcation pipe is usually between 65° and 80°. This angle range helps balance water flow, reduce head loss, and improve the structural stability of the bifurcation pipe. In some hydropower station projects, the bifurcation angle of the symmetrical Y-shaped bifurcation pipe is set to 70° or 75° to meet engineering requirements and optimize the design. Therefore, the angle of the steel bifurcation pipe is different. The existing base does not have a certain adjustment function. In other words, the existing fixing device is placed directly on the ground, and then the sealing block is installed. The position of the sealing block needs to be constantly adjusted, which is time-consuming, labor-intensive, and inefficient.

[0003] In addition, after the main pipe is sealed, the side pipe also needs to be sealed. Traditional steel branch pipe water pressure test entry door devices mostly adopt an outward opening method. Due to the high water pressure of the steel branch pipe, the requirements for the connection structure are high. Even if a precise entry door is used, there are still great hidden dangers in the sealing. During the water pressure test, if the seal is not tight, the water pressure may not be applied accurately, affecting the accuracy of the test results, and even causing safety hazards to the test personnel and equipment.

[0004] Therefore, it is urgent to improve the device that affects the residual stress of steel bifurcated pipe welding to solve the above-mentioned problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a device and method for water pressure detection of the influence of residual stress in welding of steel bifurcated pipes. The support base can be adjusted to a certain angle through the side pipe adjustment to adapt to steel bifurcated pipes at different angles, thereby improving the scope of use and flexibility. The main pipe sealing head seals the main pipe of the steel bifurcated pipe, the side pipe sealing mechanism seals the side pipe of the steel bifurcated pipe, and the high-pressure metal water inlet pipe injects water into the interior of the steel bifurcated pipe. The ultrasonic stress detector is used for detection. The structure is simple and the detection efficiency is greatly improved.

[0006] In order to achieve the above objectives, the main technical solutions adopted by the present invention include:

[0007] A device for water pressure detection of residual stress effects of welding on steel bifurcated pipes, comprising a main pipe support base and a plurality of side pipe adjustment support bases rotatably arranged at one end of the main pipe support base, a steel bifurcated pipe being arranged on the upper side of the main pipe support base, a plurality of ultrasonic stress detectors being fixedly arranged at the welded portion of the outer side of the steel bifurcated pipe, a main pipe sealing head being slidably arranged on the main pipe support base, a venting mechanism being arranged on the main pipe sealing head, the main pipe sealing head being used to seal the main pipe of the steel bifurcated pipe, a high-pressure metal water inlet pipe being arranged in the middle of the main pipe sealing head, one end of the high-pressure metal water inlet pipe being connected to the interior of the steel bifurcated pipe, and the other end of the high-pressure metal water inlet pipe being connected to a high-pressure water pump;

[0008] The side pipe adjustment support base is connected to a U-shaped support frame at one end away from the main pipe support base, and a side pipe sealing mechanism is slidably provided on the U-shaped support frame. The side pipe sealing mechanism includes a sealing disk and a hollow driving rod. The hollow driving rod is used to horizontally push the sealing disk, and the sealing disk is used to seal the side pipe of the steel bifurcated pipe;

[0009] An airbag is provided in the middle of the sealing disk, and the airbag is connected to the hollow drive rod. The end of the hollow drive rod away from the sealing disk is connected to an air pump. Protective compartments are provided on both sides of the sealing disk, and a limiting support ring is fixedly provided on the protective compartment. A plurality of centrally symmetrical airbag protection mechanisms are provided on the protective compartment. The airbag protection mechanism includes a fixedly connected metal rod and an arc-shaped metal ring. The metal rod passes through the limiting support ring and is slidably provided on the limiting support ring. A waterproof metal wire is provided at one end of the metal rod close to the arc-shaped metal ring, and a limiting ring is fixedly provided on the other end of the metal rod. A first spring is provided between the limiting ring and the limiting support ring. After the waterproof metal wire is energized, the metal rod generates magnetism and is adsorbed on the inner side of the steel branch pipe.

[0010] Preferably, the limiting support ring is provided with a plurality of evenly distributed through holes, the metal rod passes through the through holes and is slidably arranged inside the through holes, the limiting ring is arranged inside the limiting support ring, one end of the first spring is connected to the limiting ring, the other end of the first spring is fixedly connected to the limiting support ring, and the first spring is in an initial state when the waterproof metal wire is not energized;

[0011] The first spring is fixed on the metal rod and is connected to an external power supply.

[0012] Preferably, an airbag compartment is provided on the sealing disk, and the airbag is fixedly arranged inside the airbag compartment and is connected to the air pump through the hollow driving rod.

[0013] Preferably, a driving bar is fixedly provided at the bottom of the hollow driving rod, a driving tooth is fixedly provided on the driving bar, the end of the side tube adjustment support base away from the main tube support base is connected to a U-shaped support frame, the hollow driving rod is slidably provided on the U-shaped support frame, a driving motor is fixedly provided inside the U-shaped support frame, a driving gear is provided at the output end of the driving motor, the driving gear is meshed with the driving teeth, and the driving motor is used to push the hollow driving rod horizontally.

[0014] Preferably, the main tube support base is provided with a base connection slot corresponding to the side tube adjustment support base at one end close to the side tube adjustment support base, and one end of the side tube adjustment support base is rotatably provided on the base connection slot through a rotating shaft.

[0015] Preferably, a plurality of evenly distributed adjustment support feet are provided at the bottom of the side tube adjustment support base, and balls are rotatably provided at the bottom of the adjustment support feet.

[0016] Preferably, a telescopic rod fixing bracket is fixedly provided on one side of the adjustable support foot, and a vertical electric telescopic rod is connected to the interior of the telescopic rod fixing bracket via a second spring, and the vertical electric telescopic rod passes through the side tube adjustable support base and extends to the upper side surface of the side tube adjustable support base;

[0017] The output end of the vertical electric telescopic rod is connected to a C-shaped support ring, and the C-shaped support ring is used to support the steel bifurcation pipe.

[0018] Preferably, a horizontal drive slot is provided inside the main pipe support base, a horizontal electric telescopic rod is fixedly installed inside the horizontal drive slot, the output end of the horizontal electric telescopic rod is connected to a slider, the slider is slidably arranged inside the horizontal drive slot, and the high-pressure metal water inlet pipe is fixed on the slider.

[0019] Preferably, the exhaust mechanism includes a slidingly connected exhaust base and an exhaust head, the bottom of the exhaust head is connected to a connecting pipe, the connecting pipe is slidably arranged inside the exhaust base through a gravity limit ring, the outer side of the exhaust head is fixedly provided with a buoyancy ring, the bottom of the exhaust base is connected to an exhaust connecting pipe, the exhaust connecting pipe passes through the main sealing head and is connected to a stop valve.

[0020] A method for using a device for water pressure detection of residual stress effects of welding of a steel bifurcated pipe comprises the following steps:

[0021] Step 1: Install the steel bifurcation pipe. Place the steel bifurcation pipe on the main pipe support base, adjust the angles of the two side pipe support bases to adapt to the angles of the side pipes of the steel bifurcation pipe, and start the vertical electric telescopic rod on the side pipe support base to make the steel bifurcation pipe in a horizontal state;

[0022] Step 2: Connect the hydrostatic test system, start the drive motor to push the hollow drive rod and allow the sealing disc to penetrate into the side pipe of the steel bifurcated pipe to seal the side pipe. Specifically:

[0023] First, connect the waterproof metal wire on the metal rod to make the arc-shaped metal ring magnetic and adsorbed on the inner side of the steel branch pipe;

[0024] Then, start the air pump to inflate the air bag so that the air bag contacts the inner side of the steel bifurcated pipe to achieve a sealing effect;

[0025] Finally, start the horizontal electric telescopic rod to make the main pipe sealing head press against the main pipe of the steel bifurcated pipe to seal the main pipe of the steel bifurcated pipe;

[0026] Step 3: Arrange the welding residual stress detection device and arrange the ultrasonic stress detector at the welding position of the steel bifurcated pipe;

[0027] Step 4: Water pressure loading and stress testing, specifically:

[0028] Flushing and exhaust: Start the high-pressure water pump to fill water into the steel bifurcated pipe through the high-pressure metal water inlet pipe, and exhaust the air in the pipe through the exhaust mechanism. After the air is exhausted, close the stop valve to ensure the accuracy of the water pressure test;

[0029] Gradual pressurization: gradually increase the pressure and maintain it at each pressure level for a period of time to observe the deformation and stress changes of the steel bifurcated pipe.

[0030] The present invention has at least the following beneficial effects:

[0031] 1. The support base can be adjusted to a certain angle through the side pipe to adapt to steel bifurcation pipes at different angles, thereby improving the scope of use and flexibility. After the steel bifurcation pipe is placed on the main pipe support base, it is tested by an ultrasonic stress detector. The structure is simple and the convenience of use is improved. The main pipe of the steel bifurcation pipe is sealed through the main pipe sealing head. At the same time, water can be injected into the interior of the steel bifurcation pipe through the high-pressure metal water inlet pipe for testing. Therefore, the steel bifurcation pipe can be sealed and pressurized by water injection.

[0032] 2. After the air pump is started, the gas enters the interior of the airbag through the hollow drive rod. The airbag squeezes the inner side of the steel bifurcated pipe to achieve the purpose of sealing. Since the airbag has a certain elasticity and may deform to a certain extent, airbag protection mechanisms are provided on both sides of the sealing disk to protect the airbag, reduce the degree of deformation of the airbag, and ensure the sealing effect;

[0033] In addition, in order to further reduce the degree of deformation of the airbag, metal rods need to be set on both sides of the airbag to protect the airbag. In order to ensure the stability of the metal rod, a waterproof metal wire is fixed on the metal rod. After the waterproof metal wire is energized, the metal rod generates magnetism and is adsorbed on the inner side of the steel branch pipe to ensure the stability of the metal rod. The two sides of the airbag will be against the metal rod, thereby protecting the airbag and improving the sealing effect. The main pipe of the steel branch pipe is sealed by the main pipe sealing head, and the side pipe of the steel branch pipe is sealed by the side pipe sealing mechanism. The structure is simple and greatly improves the efficiency of detection.

[0034] 3. During the water injection process, it is necessary to discharge the air inside the steel bifurcated pipe. During the water injection process, the air will gather at the top of the steel bifurcated pipe. The exhaust head is slidably set inside the exhaust base through the connecting pipe. The exhaust head is always on top to facilitate the discharge of air. As the water level rises, the buoyancy ring lifts the exhaust head upward under the action of buoyancy to prevent water from entering the interior of the exhaust mechanism. When the water level reaches the top of the steel bifurcated pipe, a small amount of water will be discharged through the exhaust connecting pipe. At this time, closing the stop valve can prevent the water from flowing out, achieving the purpose of drainage and sealing the inside of the steel bifurcated pipe. Then start the high-pressure water pump to pressurize the inside of the steel bifurcated pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0036] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0037] Figure 2 The local structure of the present invention Figure 1 ;

[0038] Figure 3 It is a structural diagram of the airbag protection mechanism of the present invention;

[0039] Figure 4 This is a structural diagram of the side tube sealing mechanism of the present invention;

[0040] Figure 5 is a cross-sectional view of the side tube sealing mechanism of the present invention;

[0041] Figure 6 is a cross-sectional view of the main pipe sealing head of the present invention;

[0042] Figure 7 This is a structural diagram of the main pipe sealing head of the present invention;

[0043] Figure 8 The local structure of the present invention Figure 2 ;

[0044] Figure 9 It is a top view of the present invention.

[0045] In the figure, 1. Main pipe support base; 101. Base connecting slot; 102. Horizontal drive slide; 2. Side pipe adjustment support base; 201. U-shaped support frame; 202. Telescopic rod fixing frame; 203. Rotating shaft; 204. Adjustable support foot; 205. Ball bearing; 3. Side pipe sealing mechanism; 301. Sealing disk; 302. Hollow drive rod; 3021. Drive bar; 3022. Drive gear; 303. Drive motor; 3031. Drive gear; 305. Protective compartment; 306. Limit support ring; 307. Airbag compartment; 308. Airbag; 309. Through hole; 4. Airbag protection mechanism; 401. Metal rod; 402. Arc-shaped metal ring; 403. Limiting ring; 404. First spring; 405. Waterproof metal wire; 5. Vertical electric telescopic rod; 501. Second spring; 502. C-shaped support ring; 6. Horizontal electric telescopic rod; 601. Slider; 7. Main pipe sealing head; 701. High-pressure metal water inlet pipe; 8. Exhaust mechanism; 801. Exhaust base; 802. Exhaust head; 803. Buoyancy ring; 804. Connecting pipe; 805. Gravity limiting ring; 806. Exhaust connecting pipe; 807. Stop valve. DETAILED DESCRIPTION

[0046] The following will describe the implementation methods of the present application in detail with reference to the accompanying drawings and examples, so that the implementation process of how the present application applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0047] like Figures 1-9As shown, the device for detecting the influence of residual stress of welding of steel bifurcated pipes provided by this embodiment includes a main pipe support base 1 and a plurality of side pipe adjustment support bases 2 rotatably arranged at one end of the main pipe support base 1. The bifurcation angle of the steel bifurcated pipe is usually between 65° and 80°. This angle range helps to balance the water flow, reduce the head loss, and improve the structural stability of the bifurcated pipe. In some hydropower station projects, the bifurcation angle of the symmetrical Y-shaped bifurcated pipe is set to 70° or 75° to meet the engineering requirements and optimize the design. Therefore, the angle of the steel bifurcated pipe is different. The side pipe adjustment support base 2 can be adjusted to a certain angle to adapt to steel bifurcated pipes of different angles, thereby improving the scope of use and flexibility. The upper side of the main pipe support base 1 is provided with a steel bifurcated pipe, and a plurality of ultrasonic stress detectors are fixedly provided at the welding part of the outer side of the steel bifurcated pipe. After the steel bifurcated pipe is placed on the main pipe support base 1, it is tested by an ultrasonic stress detector. The structure is simple and the convenience of use is improved. A main pipe sealing head 7 is slidably provided on the main pipe support base 1. An exhaust mechanism 8 is provided on the main pipe sealing head 7. The main pipe sealing head 7 is used to seal the main pipe of the steel bifurcated pipe. A high-pressure metal water inlet pipe 701 is provided in the middle of the main pipe sealing head 7. One end of the high-pressure metal water inlet pipe 701 is connected to the interior of the steel bifurcated pipe. The other end of the high-pressure metal water inlet pipe 701 is connected to a high-pressure water pump. A main pipe sealing head 7 is provided at one end of the main pipe support base 1. The main pipe of the steel bifurcated pipe is sealed by the main pipe sealing head 7. At the same time, water can be injected into the interior of the steel bifurcated pipe through the high-pressure metal water inlet pipe 701 for testing. Therefore, the steel bifurcated pipe can be sealed and pressurized by water injection.

[0048] After the main pipe is sealed, the side pipe needs to be sealed. Traditional steel bifurcated pipe water pressure test access door devices mostly adopt an outward opening method. Due to the high water pressure of the steel bifurcated pipe, the requirements for the connection structure are high. Even if a precise access door is used, there are still great hidden dangers in the sealing. During the water pressure test, if the seal is not tight, the water pressure may not be applied accurately, affecting the accuracy of the test results, and even causing safety hazards to the test personnel and equipment. The side pipe adjustment support base 2 is connected to a U-shaped support frame 201 at one end away from the main pipe support base 1. A side pipe sealing mechanism 3 is slidably provided on the U-shaped support frame 201. The side pipe sealing mechanism 3 includes a sealing disk 301 and a hollow driving rod 302. The hollow driving rod 302 is used to push the sealing disk 301 horizontally. The sealing disk 301 is used to seal the side pipe of the steel bifurcated pipe. The sealing disk 301 can be pushed into the interior of the steel bifurcated pipe through the hollow driving rod 302. The structure is simple, thereby reducing labor costs.

[0049] An air bag 308 is provided in the middle of the sealing disk 301, and the air bag 308 is connected to the hollow driving rod 302. The end of the hollow driving rod 302 away from the sealing disk 301 is connected to an air pump. After the air pump is started, the gas enters the interior of the air bag 308 through the hollow driving rod 302, and the air bag 308 squeezes the inner side surface of the steel bifurcation pipe to achieve the purpose of sealing. Since the air bag 308 has a certain elasticity, it may undergo a certain deformation. Protective chambers 305 are provided on both sides of the sealing disk 301. A limited support ring 306 is fixedly provided on the protective chamber 305. A number of air bag protection mechanisms 4 are provided on the protective chamber 305 in a centrally symmetrical manner. The air bag protection mechanism 4 includes a fixedly connected metal The metal rod 401 and the arc-shaped metal ring 402 are connected. The metal rod 401 passes through the limit support ring 306 and is slidably set on the limit support ring 306. A waterproof metal wire 405 is set at one end of the metal rod 401 close to the arc-shaped metal ring 402. A limit ring 403 is fixedly set at the other end of the metal rod 401. A first spring 404 is set between the limit ring 403 and the limit support ring 306. After the waterproof metal wire 405 is energized, the metal rod 401 generates magnetism and is adsorbed on the inner side of the steel bifurcation pipe. Therefore, airbag protection mechanisms 4 are set on both sides of the sealing disk 301. The airbag protection mechanism 4 protects the airbag 308, reduces the deformation of the airbag 308, and ensures the sealing effect.

[0050] In addition, in order to further reduce the degree of deformation of the airbag 308, the metal rod 401 needs to be set on both sides of the airbag 308 to protect the airbag 308. In order to ensure the stability of the metal rod 401, a waterproof metal wire 405 is fixed on the metal rod 401. After the waterproof metal wire 405 is energized, the metal rod 401 generates magnetism and is adsorbed on the inner side of the steel branch pipe to ensure the stability of the metal rod 401. The two sides of the airbag 308 will be against the metal rod 401, thereby protecting the airbag 308 and improving the sealing effect. The main pipe of the steel branch pipe is sealed by the main pipe sealing head 7, and the side pipe of the steel branch pipe is sealed by the side pipe sealing mechanism 3. The structure is simple and the detection efficiency is greatly improved.

[0051] Further, such as Figure 3 and Figure 4As shown, a plurality of evenly distributed through holes 309 are opened on the limiting support ring 306, and the metal rod 401 passes through the through holes 309 and is slidably arranged inside the through holes 309. The limiting ring 403 is arranged inside the limiting support ring 306, and one end of the first spring 404 is connected to the limiting ring 403, and the other end of the first spring 404 is fixedly connected to the limiting support ring 306. When the waterproof metal wire 405 is not energized, the first spring 404 is in an initial state. The first spring 404 is fixedly arranged on the metal rod 401 and is connected to an external power supply. The metal rod 401 is slidably arranged on the limit support ring 306. When the waterproof metal wire 405 is energized, the metal rod 401 generates magnetism and is adsorbed on the inner side of the steel bifurcated pipe. At this time, the first spring 404 is in a compressed state. When the waterproof metal wire 405 is de-energized, the magnetism of the metal rod 401 disappears, and the metal rod 401 returns to its initial state under the action of the first spring 404. Therefore, by closing the waterproof metal wire 405, the magnetism of the metal rod 401 is realized, thereby achieving the purpose of protecting the airbag 308 and improving the efficiency of disassembly.

[0052] Moreover, an airbag compartment 307 is opened on the sealing disk 301, and the airbag 308 is fixedly arranged inside the airbag compartment 307 and is connected to the air pump through the hollow driving rod 302. The airbag 308 is arranged inside the airbag compartment 307, and the airbag compartment 307 can protect the airbag 308 and improve the service life of the airbag 308.

[0053] In order to adapt to different lengths of steel bifurcated pipes, such as Figure 3 As shown, a driving bar 3021 is fixedly provided at the bottom of the hollow driving rod 302, and a driving tooth 3022 is fixedly provided on the driving bar 3021. The end of the side pipe adjustment support base 2 away from the main pipe support base 1 is connected to the U-shaped support frame 201, and the hollow driving rod 302 is slidably set on the U-shaped support frame 201. A driving motor 303 is fixedly provided inside the U-shaped support frame 201, and a driving gear 3031 is provided at the output end of the driving motor 303, which is meshed and connected with the driving tooth 3022. The driving motor 303 is used to push the hollow driving rod 302 horizontally. The driving motor 303 is arranged inside the U-shaped support frame 201. At the same time, the U-shaped support frame 201 can support the hollow driving rod 302. After the driving motor 303 is started, the driving gear 3031 rotates and drives the driving tooth 3022 to make the hollow driving rod 302 move horizontally, thereby being able to adapt to side pipes of different lengths and saving a lot of manpower and material resources.

[0054] Furthermore, in order to facilitate the adjustment of the side tube adjustment support base 2, as Figure 6 and Figure 8As shown, one end of the main pipe support base 1 close to the side pipe adjustment support base 2 is provided with a base connection slot 101 corresponding to the side pipe adjustment support base 2, and one end of the side pipe adjustment support base 2 is rotatably set on the base connection slot 101 through a rotating shaft 203. One end of the side pipe adjustment support base 2 is rotatably set on the base connection slot 101 of the main pipe support base 1 through the rotating shaft 203, so that the side pipe adjustment support base 2 can be rotated to a certain angle, thereby improving the flexibility and range of use;

[0055] During the adjustment process, it is necessary to ensure the stability of the rotation of the side tube adjustment support base 2. A number of evenly distributed adjustment support feet 204 are provided at the bottom of the side tube adjustment support base 2. The bottom of the adjustment support feet 204 is rotatably provided with a ball 205. Two adjustment support feet 204 are provided at the bottom of the side tube adjustment support base 2. The bottom of the adjustment support feet 204 is rotatably provided with a ball 205. Therefore, during the movement of the side tube adjustment support base 2, the ball 205 can reduce the friction between the side tube adjustment support base 2 and the ground, thereby improving the convenience of adjustment.

[0056] In addition, a telescopic rod fixing frame 202 is fixedly provided on one side of the adjustment support foot 204, and the interior of the telescopic rod fixing frame 202 is connected to a vertical electric telescopic rod 5 through a second spring 501. The vertical electric telescopic rod 5 passes through the side tube adjustment support base 2 and extends to the upper side of the side tube adjustment support base 2. The output end of the vertical electric telescopic rod 5 is connected to a C-shaped support ring 502. The C-shaped support ring 502 is used to support the steel branch pipe. In order to make the steel branch pipes on the same horizontal line, it is necessary to adjust the height of the steel branch pipe side pipe. Therefore, two vertical electric telescopic rods 5 are provided on the side tube adjustment support base 2. After starting the vertical electric telescopic rod 5, the steel branch pipe is supported and adjusted by the C-shaped support ring 502.

[0057] Furthermore, extrusion is required during the detection process, such as Figure 6 and Figure 8 As shown, a horizontal driving chute 102 is provided inside the main pipe support base 1, and a horizontal electric telescopic rod 6 is fixedly provided inside the horizontal driving chute 102. The output end of the horizontal electric telescopic rod 6 is connected to a slider 601, which is slidably provided inside the horizontal driving chute 102. A high-pressure metal water inlet pipe 701 is fixedly provided on the slider 601. The slider 601 is slidably provided on the horizontal driving chute 102 through the horizontal electric telescopic rod 6. The slider 601 drives the main pipe sealing head 7 to move and seal the main port of the steel bifurcated pipe. The structure is simple and the detection efficiency is high.

[0058] During the water injection process, the air inside the steel bifurcated pipe needs to be discharged. During the water injection process, the air will gather at the top of the steel bifurcated pipe. Figure 6As shown, the exhaust mechanism 8 includes an exhaust base 801 and an exhaust head 802 that are slidably connected. The bottom of the exhaust head 802 is connected with a connecting pipe 804, and the connecting pipe 804 is slidably set inside the exhaust base 801 through a gravity limit ring 805. The exhaust head 802 is slidably set inside the exhaust base 801 through the connecting pipe 804. The exhaust head 802 is always above to facilitate the exhaust of air. A buoyancy ring 803 is fixedly provided on the outer side of the exhaust head 802. As the water level rises, the buoyancy ring 803 is acted upon by the buoyancy to lift the exhaust head 802 upward to prevent water from entering the interior of the exhaust mechanism 8. The bottom of the exhaust base 801 is connected with an exhaust connecting pipe 806, which passes through the main sealing head 7 and is connected to a stop valve 807. When the water level reaches the top of the steel bifurcated pipe, a small amount of water will be discharged through the exhaust connecting pipe 806. At this time, closing the stop valve 807 can prevent the water from flowing out, thereby achieving the purpose of drainage and sealing the interior of the steel bifurcated pipe. Then, the high-pressure water pump is started to pressurize the interior of the steel bifurcated pipe.

[0059] like Figures 1-9 As shown, the method for using the device for water pressure detection of residual stress effects of welding of steel bifurcated pipes provided in this embodiment includes the following steps:

[0060] Step 1: Install the steel bifurcation pipe. Place the steel bifurcation pipe on the main pipe support base 1, and adjust the angles of the two side pipe adjustment support bases 2 to adapt to the angles of the side pipes of the steel bifurcation pipe. Then start the vertical electric telescopic rod 5 on the side pipe adjustment support base 2 to make the steel bifurcation pipe in a horizontal state.

[0061] Step 2: Connect the hydraulic test system, start the drive motor 303 to push the hollow drive rod 302 and make the sealing disk 301 penetrate into the side pipe of the steel bifurcated pipe to seal the side pipe. Specifically:

[0062] First, the waterproof metal wire 405 on the metal rod 401 is connected to make the arc-shaped metal ring 402 magnetic and adsorbed on the inner side of the steel branch pipe;

[0063] Then, the air pump is started to inflate the air bag 308 so that the air bag 308 abuts against the inner side of the steel bifurcated pipe to achieve a sealing effect;

[0064] Finally, the horizontal electric telescopic rod 6 is activated to make the main pipe sealing head 7 press against the main pipe of the steel bifurcated pipe to seal the main pipe of the steel bifurcated pipe;

[0065] Step 3: Arrange the welding residual stress detection device and arrange the ultrasonic stress detector at the welding position of the steel bifurcated pipe;

[0066] Step 4: Water pressure loading and stress testing, specifically:

[0067] Flushing and exhaust: Start the high-pressure water pump to fill water into the steel bifurcated pipe through the high-pressure metal water inlet pipe 701, and exhaust the air in the pipe through the exhaust mechanism 8. After the air is exhausted, close the stop valve 807 to ensure the accuracy of the water pressure test;

[0068] Gradual pressurization: gradually increase the pressure and maintain it at each pressure level for a period of time to observe the deformation and stress changes of the steel bifurcated pipe.

[0069] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of the components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0070] It should be noted that the terms "include," "comprises," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a product or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such product or system. In the absence of further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of other identical elements in the product or system comprising the element.

[0071] The foregoing description shows and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. Rather, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the inventive concept described herein by the teachings above or by techniques or knowledge in the relevant art. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention are intended to be within the scope of the appended claims.

Claims

1. A device for water pressure detection of residual stress effects of welding on steel bifurcated pipes, comprising a main pipe support base (1) and a plurality of side pipe adjustment support bases (2) rotatably arranged at one end of the main pipe support base (1), characterized in that: A steel bifurcated pipe is provided on the upper side of the main pipe support base (1), and a plurality of ultrasonic stress detectors are fixedly provided at the welding position of the outer side of the steel bifurcated pipe. A main pipe sealing head (7) is slidably provided on the main pipe support base (1), and an exhaust mechanism (8) is provided on the main pipe sealing head (7). The main pipe sealing head (7) is used to seal the main pipe of the steel bifurcated pipe. A high-pressure metal water inlet pipe (701) is provided in the middle of the main pipe sealing head (7), one end of the high-pressure metal water inlet pipe (701) is connected to the interior of the steel bifurcated pipe, and the other end of the high-pressure metal water inlet pipe (701) is connected to a high-pressure water pump; One end of the side pipe adjustment support base (2) away from the main pipe support base (1) is connected to a U-shaped support frame (201), and a side pipe sealing mechanism (3) is slidably provided on the U-shaped support frame (201). The side pipe sealing mechanism (3) comprises a sealing disk (301) and a hollow driving rod (302). The hollow driving rod (302) is used to horizontally push the sealing disk (301), and the sealing disk (301) is used to seal the side pipe of the steel bifurcated pipe. An airbag (308) is provided in the middle of the sealing disk (301), the airbag (308) is connected to the hollow driving rod (302), and an air pump is connected to one end of the hollow driving rod (302) away from the sealing disk (301). Protective chambers (305) are provided on both sides of the sealing disk (301), and a limited support ring (306) is fixedly provided on the protective chamber (305). A plurality of airbag protective mechanisms (4) are provided on the protective chamber (305) in a centrally symmetrical manner. The airbag protective mechanisms (4) include a fixedly connected metal rod (401) and an arc-shaped metal rod (406). The metal rod (401) passes through the limiting support ring (306) and is slidably arranged on the limiting support ring (306). A waterproof metal wire (405) is provided at one end of the metal rod (401) close to the arc-shaped metal ring (402). A limiting ring (403) is fixedly provided at the other end of the metal rod (401). A first spring (404) is provided between the limiting ring (403) and the limiting support ring (306). When the waterproof metal wire (405) is energized, the metal rod (401) generates magnetism and is adsorbed on the inner side of the steel branch pipe.

2. The device for detecting the influence of residual stress in welding of steel bifurcated pipes by water pressure according to claim 1, characterized in that: The limiting support ring (306) is provided with a plurality of evenly distributed through holes (309), the metal rod (401) passes through the through holes (309) and is slidably arranged inside the through holes (309), the limiting ring (403) is arranged inside the limiting support ring (306), one end of the first spring (404) is connected to the limiting ring (403), the other end of the first spring (404) is fixedly connected to the limiting support ring (306), and the first spring (404) is in an initial state when the waterproof metal wire (405) is not energized; The first spring (404) is fixedly arranged on the metal rod (401) and is connected to an external power supply.

3. The device for detecting the influence of residual stress in welding of steel bifurcated pipes by water pressure according to claim 1, characterized in that: An airbag compartment (307) is provided on the sealing disk (301), and the airbag (308) is fixedly arranged inside the airbag compartment (307) and is connected to the air pump via the hollow driving rod (302).

4. The device for detecting the influence of residual stress in welding of steel bifurcated pipes by water pressure according to claim 1, characterized in that: A driving bar (3021) is fixedly provided at the bottom of the hollow driving rod (302), and a driving tooth (3022) is fixedly provided on the driving bar (3021). The hollow driving rod (302) is slidably provided on the U-shaped support frame (201), and a driving motor (303) is fixedly provided inside the U-shaped support frame (201). A driving gear (3031) is provided at the output end of the driving motor (303), and the driving gear (3031) is meshedly connected with the driving tooth (3022). The driving motor (303) is used to horizontally push the hollow driving rod (302).

5. The device for water pressure detection of residual stress in welding of steel bifurcated pipes according to claim 1, characterized in that: One end of the main tube support base (1) close to the side tube adjustment support base (2) is provided with a base connection slot (101) corresponding to the side tube adjustment support base (2); one end of the side tube adjustment support base (2) is rotatably arranged on the base connection slot (101) via a rotating shaft (203).

6. The device for detecting the influence of residual stress in welding of steel bifurcated pipes by water pressure according to claim 1, characterized in that: The bottom of the side tube adjustment support base (2) is provided with a plurality of evenly distributed adjustment support feet (204), and the bottom of the adjustment support feet (204) is rotatably provided with a ball (205).

7. The device for water pressure detection of residual stress effects of welding of steel bifurcated pipes according to claim 6, characterized in that: A telescopic rod fixing frame (202) is fixedly provided on one side of the adjustment support foot (204); a vertical electric telescopic rod (5) is connected to the interior of the telescopic rod fixing frame (202) via a second spring (501); the vertical electric telescopic rod (5) passes through the side tube adjustment support base (2) and extends to the upper side of the side tube adjustment support base (2); The output section of the vertical electric telescopic rod (5) is connected to a C-shaped support ring (502), and the C-shaped support ring (502) is used to support the steel bifurcated pipe.

8. The device for water pressure detection of residual stress in steel bifurcated pipe welding according to claim 1, characterized in that: A horizontal driving chute (102) is provided inside the main pipe support base (1), a horizontal electric telescopic rod (6) is fixedly provided inside the horizontal driving chute (102), an output end of the horizontal electric telescopic rod (6) is connected to a slider (601), the slider (601) is slidably provided inside the horizontal driving chute (102), and the high-pressure metal water inlet pipe (701) is fixedly provided on the slider (601).

9. The device for water pressure detection of residual stress effects of welding of steel bifurcated pipes according to claim 1, characterized in that: The exhaust mechanism (8) comprises an exhaust base (801) and an exhaust head (802) that are slidably connected. The bottom of the exhaust head (802) is connected to a connecting pipe (804). The connecting pipe (804) is slidably arranged inside the exhaust base (801) through a gravity limit ring (805). A buoyancy ring (803) is fixedly arranged on the outer side of the exhaust head (802). The bottom of the exhaust base (801) is connected to an exhaust connecting pipe (806). The exhaust connecting pipe (806) passes through the main pipe sealing head (7) and is connected to a stop valve (807).

10. A method for using a device for water pressure detection of residual stress effects of welding of steel bifurcated pipes, characterized in that: The device for detecting the influence of residual stress of welding of steel bifurcated pipes by water pressure according to claim 1 comprises the following steps: Step 1: Install the steel bifurcated pipe. Place the steel bifurcated pipe on the main pipe support base (1), adjust the angles of the two side pipe adjustment support bases (2) to adapt to the angles of the side pipes of the steel bifurcated pipe, and start the vertical electric telescopic rod (5) on the side pipe adjustment support base (2) to make the steel bifurcated pipe in a horizontal state; Step 2: Connect the hydraulic test system, start the drive motor (303) to push the hollow drive rod (302) and make the sealing disc (301) penetrate into the side pipe of the steel bifurcated pipe to seal the side pipe, specifically: First, the waterproof metal wire (405) on the metal rod (401) is connected to make the arc-shaped metal ring (402) generate magnetism and be adsorbed on the inner side of the steel bifurcated pipe; Then, the air pump is started to inflate the air bag (308) so that the air bag (308) and the inner side surface of the steel bifurcated pipe are pressed against each other to achieve a sealing effect; Finally, the horizontal electric telescopic rod (6) is activated to make the main pipe sealing head (7) press against the main pipe of the steel branch pipe to seal the main pipe of the steel branch pipe; Step 3: Arrange the welding residual stress detection device and arrange the ultrasonic stress detector at the welding position of the steel bifurcated pipe; Step 4: Water pressure loading and stress testing, specifically: Flushing and exhausting: Start the high-pressure water pump to fill water into the steel bifurcated pipe through the high-pressure metal water inlet pipe (701), and exhaust the air in the pipe through the exhaust mechanism (8). After the air is exhausted, close the stop valve (807) to ensure the accuracy of the water pressure test; Gradual pressurization: gradually increase the pressure and maintain it at each pressure level for a period of time to observe the deformation and stress changes of the steel bifurcated pipe.

Images