A welding seam grinding mechanism for a hydrogen pipeline

Abstract

The application discloses a kind of weld grinding mechanisms of hydrogen pipeline, it is related to hydrogen pipeline manufacturing technical field, first vertical movement component is equipped in support frame one side, first grinding assembly is fixedly installed on first vertical movement component, first vertical movement component drives first grinding assembly to move along vertical direction, second vertical movement component is equipped in support frame other side, second grinding assembly is fixedly installed on second vertical movement component, second vertical movement component drives second grinding assembly to move along vertical direction, second horizontal movement component and first horizontal movement component are equipped in support frame.The weld position of hydrogen pipeline is adjusted according to the first grinding assembly and the position of second grinding assembly in horizontal direction and vertical direction, abrasive belt is used to grind the weld of hydrogen pipeline, it is convenient to adjust the horizontal position and vertical position of grinding assembly, the present application has the advantages of high-quality grinding, ensure that the weld surface is flat.

Description

Technical Field

[0001] This invention relates to the field of hydrogen pipeline manufacturing technology, and in particular to a weld grinding mechanism for hydrogen pipelines. Background Technology

[0002] The hydrogen transmission pipeline is a straight seam welded pipe with a diameter of 406-1420cm. The weld seam of the hydrogen transmission pipeline is generally 2-3cm wide and 3.5cm high. According to the usage requirements of the pipeline, the weld seam of the hydrogen transmission pipeline needs to be ground to make the weld seam height 0.5cm higher than the height of the base material.

[0003] As a crucial connection point in hydrogen pipelines, welds directly impact the overall performance of the pipeline. Excess weld reinforcement equates to a sudden change in local shape, causing stress concentration and increasing the risk of fatigue or brittle fracture. If corrosion protection materials such as 3PE / epoxy fiberglass cloth are used, a large excess weld reinforcement will make it difficult to firmly secure the weld toe, affecting the corrosion protection effect. Furthermore, defects or unevenness at the weld can easily lead to leaks and other safety issues, seriously threatening the safety of the pipeline system, the surrounding environment, and personnel. Therefore, high-quality grinding of hydrogen pipeline welds to ensure a smooth and flat weld surface and eliminate potential defects is a key step in ensuring the safe and efficient operation of hydrogen pipelines.

[0004] Traditional weld grinding methods, which involve manual grinding with a grinding wheel, have the following drawbacks: First, manual grinding is extremely inefficient and labor-intensive, making it difficult to meet the high-efficiency requirements for weld grinding in the construction and maintenance of large-scale hydrogen pipelines. Second, the quality of manual grinding is significantly affected by the operator's skill level and working condition, resulting in inconsistent weld quality and poor stability, making it difficult to meet high-standard quality requirements and effectively ensuring the safe operation of hydrogen pipelines. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a weld grinding mechanism for hydrogen pipelines that facilitates the adjustment of the grinding components in the horizontal and vertical positions, achieves high-quality grinding, and ensures a smooth weld surface.

[0006] The technical solution adopted to solve the above-mentioned technical problems is as follows: A support frame is provided on the moving arm, and a first vertical motion component is provided on one side of the support frame. A first grinding component for grinding the weld seam of the hydrogen transportation pipeline is fixedly installed on the first vertical motion component. The first vertical motion component drives the first grinding component to move in the vertical direction. A second vertical motion component is provided on the other side of the support frame, and a second grinding component for grinding the weld seam of the hydrogen transportation pipeline is fixedly installed on the second vertical motion component. The second vertical motion component drives the second grinding component to move in the vertical direction. The support frame is provided with a mechanism to drive the first and second vertical motion components in the horizontal direction. The sliding second horizontal motion component and the first horizontal motion component; the structure of the first grinding component is the same as that of the second grinding component. The first grinding component is as follows: a fixed frame is fixedly installed on the first vertical motion component, a second bracket is provided at the top of the fixed frame, a first motor is provided on the second bracket, the output shaft of the first motor is fixedly connected to the transmission wheel, an eccentric shaft is rotatably installed on the fixed frame, a tension wheel is eccentrically provided on the eccentric shaft, the tension wheel is located on one side below the transmission wheel, a central shaft is rotatably installed on the fixed frame, a grinding wheel is provided on the central shaft, the grinding wheel is located below the transmission wheel, and the transmission wheel, the tension wheel and the grinding wheel are connected by a sanding belt.

[0007] Furthermore, a first shaft bearing is provided between the outer circumference of the eccentric shaft and the inner circumference of the tensioning wheel.

[0008] Furthermore, a second bearing is provided between the outer circumference of the central shaft and the inner circumference of the grinding wheel.

[0009] Furthermore, a cylinder is provided on the fixed frame, and the piston rod of the cylinder is connected to the eccentric shaft through a connecting ring.

[0010] Furthermore, the first horizontal motion component comprises: a first fixed plate and a second fixed plate on the support frame; two first guide rods are provided between the first fixed plate and the second fixed plate; a first lead screw located between the two first guide rods is rotatably installed between the first fixed plate and the second fixed plate; a second motor for driving the first lead screw to rotate is provided on the second fixed plate; the first lead screw is threadedly connected to a first lead screw seat; slide rods are provided on both sides of the first lead screw seat; first horizontal sliding holes are machined on both sides of the support frame to slide horizontally with the slide rods; one end of one slide rod is fixedly connected to the first vertical motion component, and the other end of the slide rod is fixedly connected to the second vertical motion component.

[0011] Furthermore, the second horizontal motion component comprises: a third fixed plate and a fourth fixed plate on the support frame; two second guide rods are provided between the third fixed plate and the fourth fixed plate; a second lead screw located between the two second guide rods is rotatably installed between the third fixed plate and the fourth fixed plate; a third motor for driving the second lead screw to rotate is provided on the fourth fixed plate; the second lead screw is threadedly connected to the second lead screw nut; second sliders are respectively provided on both sides of the second lead screw nut; second horizontal sliding holes are respectively machined on both sides of the support frame to slide horizontally connected to the second sliders; one end of one second slider is slidably connected vertically to the first vertical motion component, and one end of the other second slider is slidably connected vertically to the second vertical motion component.

[0012] Furthermore, the structure of the first vertical motion component is the same as that of the second vertical motion component. The first vertical motion component consists of: a horizontal sliding plate located on one side of the support frame; a vertical sliding hole machined on the horizontal sliding plate to slide and connect with the second slider in the vertical direction; a shaft hole machined on the horizontal sliding plate to lock with the slide rod; vertical guide rails respectively located on both sides of the horizontal sliding plate; a first slider respectively connected to each vertical guide rail in the vertical direction; a first bracket provided on the horizontal sliding plate; a screw jack provided on the first bracket; the output end of the screw jack fixedly connected to the vertical sliding plate; and the vertical sliding plate fixedly connected to the first grinding component.

[0013] The beneficial effects of the present invention are as follows: (1) The present invention adjusts the position of the first grinding component and the second grinding component in the horizontal and vertical directions according to the position of the weld of the hydrogen pipeline. The abrasive belt is used to grind the weld of the hydrogen pipeline, which makes it easy to adjust the position of the grinding component in the horizontal and vertical directions. The present invention has the advantages of high-quality grinding and ensuring the flatness of the weld surface.

[0014] This invention uses the output end of a cylinder to drive an eccentric shaft through a connecting ring, and the eccentric shaft drives a tensioning wheel to move, which can tension the sanding belt.

[0015] In this invention, grinding the weld reinforcement makes the weld seam and the base material surface transition smoothly, reducing stress concentration, thereby improving the pipeline's resistance to hydrogen fatigue and hydrogen embrittlement.

[0016] In this invention, removing the weld reinforcement and grinding it to 0.5mm above the base material can eliminate the root cause of local stress and eliminate welding defects on the weld surface, thereby improving the strength of the welded joint.

[0017] In this invention, grinding the weld reinforcement ensures that the anti-corrosion layer can be uniformly and tightly covered on the weld surface, thereby improving the anti-corrosion performance of the pipeline. Attached Figure Description

[0018] Figure 1This is a schematic diagram of one embodiment of the weld grinding mechanism for the hydrogen transport pipeline of the present invention.

[0019] Figure 2 yes Figure 1 A structural diagram from another angle.

[0020] Figure 3 This is a structural schematic diagram of the first vertical motion component, the second vertical motion component, the first grinding component, the first horizontal motion component, and the second grinding component.

[0021] Figure 4 yes Figure 3 A schematic diagram of the structure with the first grinding component removed.

[0022] Figure 5 This is a schematic diagram of the components on the horizontal sliding plate.

[0023] Figure 6 This is a schematic diagram of the structure of the first grinding assembly.

[0024] Figure 7 yes Figure 6 A structural diagram from another angle.

[0025] Figure 8 This is a structural schematic diagram of the eccentric shaft and the first shaft bearing.

[0026] Figure 9 This is a structural diagram of the central shaft and the second bearing.

[0027] Figure 10 This is a schematic diagram of the structure of the first horizontal motion component and the second horizontal motion component.

[0028] Figure 11 This is a schematic diagram of the internal structure of the support frame.

[0029] Reference numerals: 1. Moving arm; 2. First vertical motion assembly; 201. Screw jack; 202. First support; 203. Horizontal sliding plate; 204. Vertical guide rail; 205. First slider; 206. Vertical sliding plate; 207. Vertical sliding hole; 208. Shaft hole; 3. Second vertical motion assembly; 4. First grinding assembly; 401. Fixed frame; 402. First motor; 403. Sanding belt; 404. Tensioning wheel; 405. Cylinder; 406. Grinding wheel; 407. Transmission wheel; 408. Eccentric shaft; 409. Connecting ring; 410. Central shaft; 411. First shaft bearing; 41 2. Second bearing; 413. Second bracket; 5. Support frame; 6. First horizontal motion assembly; 601. Second motor; 602. First horizontal sliding hole; 603. Slide rod; 604. First fixed plate; 605. First lead screw; 606. First guide rod; 607. First lead screw nut; 608. Second fixed plate; 7. Second horizontal motion assembly; 701. Third fixed plate; 702. Second lead screw; 703. Second slider; 704. Second lead screw nut; 705. Second guide rod; 706. Fourth fixed plate; 707. Third motor; 708. Second horizontal sliding hole; 8. Second grinding assembly. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0031] like Figures 1 to 2 As shown, the weld grinding mechanism of the hydrogen pipeline in this embodiment is composed of a moving arm 1, a first vertical motion component 2, a second vertical motion component 3, a first grinding component 4, a support frame 5, a first horizontal motion component 6, a second horizontal motion component 7, and a second grinding component 8 connected together.

[0032] A support frame 5 is provided on the movable arm 1. A first vertical motion component 2 is provided on one side of the support frame 5. A first grinding component 4 for grinding the weld seam of the hydrogen pipeline is fixedly installed on the first vertical motion component 2. The first vertical motion component 2 drives the first grinding component 4 to move in the vertical direction. A second vertical motion component 3 is provided on the other side of the support frame 5. A second grinding component 8 for grinding the weld seam of the hydrogen pipeline is fixedly installed on the second vertical motion component 3. The second vertical motion component 3 drives the second grinding component 8 to move in the vertical direction. A second horizontal motion component 7 and a first horizontal motion component 6 are provided on the support frame 5 to drive the first vertical motion component 2 and the second vertical motion component 3 to slide in the horizontal direction.

[0033] The structure of the first vertical motion component 2 is the same as that of the second vertical motion component 3, such as... Figures 3 to 5As shown, the first vertical motion component 2 is composed of a screw jack 201, a first bracket 202, a horizontal sliding plate 203, a vertical guide rail 204, a first slider 205, a vertical sliding plate 206, a vertical sliding hole 207, and a shaft hole 208.

[0034] The first vertical motion component 2 consists of: a horizontal sliding plate 203 located on one side of the support frame 5; a vertical sliding hole 207 machined on the horizontal sliding plate 203 for sliding connection with the second slider 703 in the vertical direction; a shaft hole 208 machined on the horizontal sliding plate 203 for engaging with the slide rod 603; vertical guide rails 204 respectively located on both sides of the horizontal sliding plate 203; a first slider 205 slidably connected to each vertical guide rail 204 in the vertical direction; a fixed connection between the first slider 205 and the vertical sliding plate 206; a first bracket 202 mounted on the horizontal sliding plate 203; a screw jack 201 mounted on the first bracket 202; a fixed connection between the output end of the screw jack 201 and the vertical sliding plate 206; and a fixed connection between the vertical sliding plate 206 and the first grinding component 4.

[0035] The structure of the first grinding assembly 4 is the same as that of the second grinding assembly 8, such as... Figures 6 to 9 As shown, the first grinding assembly 4 is composed of a fixed frame 401, a first motor 402, a sanding belt 403, a tensioning wheel 404, a cylinder 405, a grinding wheel 406, a transmission wheel 407, an eccentric shaft 408, a connecting ring 409, a central shaft 410, a first shaft bearing 411, a second bearing 412, and a second bracket 413.

[0036] The first grinding assembly 4 consists of: a fixed frame 401 fixedly mounted on the first vertical motion assembly 2; a second bracket 413 at the top of the fixed frame 401; a first motor 402 mounted on the second bracket 413; the output shaft of the first motor 402 fixedly connected to the transmission wheel 407; an eccentric shaft 408 rotatably mounted on the fixed frame 401; a tension wheel 404 eccentrically mounted on the eccentric shaft 408; a first shaft bearing 411 between the outer circumference of the eccentric shaft 408 and the inner circumference of the tension wheel 404; the tension wheel 404 located on one side below the transmission wheel 407; and a cylinder 405 mounted on the fixed frame 401. The piston rod of the cylinder 405 is connected to the eccentric shaft 408 via a connecting ring 409. A central shaft 410 is rotatably mounted on a fixed frame 401. A grinding wheel 406 is mounted on the central shaft 410. A second bearing 412 is provided between the outer circumference of the central shaft 410 and the inner circumference of the grinding wheel 406. The grinding wheel 406 is located below the transmission wheel 407. The transmission wheel 407, the tension wheel 404 and the grinding wheel 406 are connected by a sanding belt 403.

[0037] like Figures 10 to 11As shown, the first horizontal motion component 6 is composed of a second motor 601, a first horizontal sliding hole 602, a sliding rod 603, a first fixed plate 604, a first lead screw 605, a first guide rod 606, a first lead screw nut 607, and a second fixed plate 608 connected together.

[0038] The first horizontal motion component 6 consists of: a first fixed plate 604 and a second fixed plate 608 on the support frame 5; two first guide rods 606 between the first fixed plate 604 and the second fixed plate 608; a first lead screw 605 rotatably mounted between the first fixed plate 604 and the second fixed plate 608 and located between the two first guide rods 606; a second motor 601 for driving the first lead screw 605 to rotate on the second fixed plate 608; the first lead screw 605 is threadedly connected to a first lead screw nut 607; slide rods 603 are respectively provided on both sides of the first lead screw nut 607; first horizontal sliding holes 602 are respectively machined on both sides of the support frame 5 and are slidably connected to the slide rods 603 in the horizontal direction; one end of one slide rod 603 is fixedly connected to the first vertical motion component 2, and the other end of the slide rod 603 is fixedly connected to the second vertical motion component 3.

[0039] like Figures 10 to 11 As shown, the second horizontal motion assembly 7 is composed of a third fixed plate 701, a second lead screw 702, a second slider 703, a second lead screw nut 704, a second guide rod 705, a fourth fixed plate 706, a third motor 707, and a second horizontal sliding hole 708.

[0040] The second horizontal motion component 7 consists of: a third fixed plate 701 and a fourth fixed plate 706 on the support frame 5; two second guide rods 705 between the third fixed plate 701 and the fourth fixed plate 706; a second lead screw 702 rotatably mounted between the third fixed plate 701 and the fourth fixed plate 706 and located between the two second guide rods 705; a third motor 707 for driving the second lead screw 702 to rotate on the fourth fixed plate 706; the second lead screw 702 is threadedly connected to a second lead screw nut 704; second sliders 703 are respectively provided on both sides of the second lead screw nut 704; second horizontal sliding holes 708 are respectively machined on both sides of the support frame 5 to slide horizontally connected to the second sliders 703; one end of one second slider 703 is slidably connected vertically to the first vertical motion component 2, and one end of the other second slider 703 is slidably connected vertically to the second vertical motion component 3.

[0041] The working principle of this embodiment is as follows: (1) Adjusting the horizontal position: The output shaft of the second motor 601 drives the first lead screw 605 to rotate, the first lead screw 607 moves horizontally on the first lead screw 605, and at the same time, the first lead screw 607 slides horizontally on the two first guide rods 606. The slide rods 603 on both sides of the first lead screw 607 slide in the first horizontal sliding hole 602 of the support frame 5 respectively. The slide rod 603 on one side of the first lead screw 607 drives the first vertical motion component 2 and the first grinding component 4 to slide horizontally. The slide rod 603 on the other side of the first lead screw 607 drives the second vertical motion component 3 and the second grinding component 8 to slide horizontally. According to the weld position of the hydrogen pipeline, the position of the first grinding component 4 and the second grinding component 8 in the horizontal direction is adjusted.

[0042] The output shaft of the third motor 707 drives the second lead screw 702 to rotate. The second lead screw nut 704 slides horizontally on the second lead screw 702. At the same time, the second lead screw nut 704 slides horizontally on the two second guide rods 705. The second sliders 703 on both sides of the second lead screw nut 704 slide horizontally in the second horizontal sliding holes 708 of the support frame 5.

[0043] When the horizontal movement positions of the first wire seat 607 and the second wire seat 704 are not consistent, the second slider 703 on one side of the second wire seat 704 slides in the vertical direction in the vertical sliding hole 207 of the horizontal sliding plate 203. Since the working principle of the first vertical motion component 2 is the same as that of the second vertical motion component 3, the second slider 703 on the other side of the second wire seat 704 is also slidably connected to the second vertical motion component 3.

[0044] (2) Adjusting the vertical position: The output end of the screw jack 201 drives the vertical sliding plate 206 to slide in the vertical direction. The first slider 205 on the vertical sliding plate 206 slides in the vertical direction on the vertical guide rail 204. The vertical sliding plate 206 drives the first grinding component 4 to move in the vertical direction. According to the weld position of the hydrogen pipeline, the position of the first grinding component 4 in the vertical direction is adjusted. The principle is the same as above. The second vertical motion component 3 can adjust the position of the second grinding component 8 in the vertical direction.

[0045] (3) Grinding the weld of the hydrogen pipeline: The output shaft of the first motor 402 drives the transmission wheel 407 to rotate. The transmission wheel 407 drives the tension wheel 404 and the grinding wheel 406 to rotate through the sand belt 403. The sand belt 403 is used to grind the weld of the hydrogen pipeline.

[0046] The output end of cylinder 405 drives the eccentric shaft 408 to move through the connecting ring 409, and the eccentric shaft 408 drives the tensioning wheel 404 to move, thus tensioning the sanding belt 403.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A weld grinding mechanism for a hydrogen transport pipeline, characterized in that: A support frame (5) is provided on the movable arm (1). A first vertical motion component (2) is provided on one side of the support frame (5). A first grinding component (4) for grinding the weld seam of the hydrogen pipeline is fixedly installed on the first vertical motion component (2). The first vertical motion component (2) drives the first grinding component (4) to move in the vertical direction. A second vertical motion component (3) is provided on the other side of the support frame (5). A second grinding component (8) for grinding the weld seam of the hydrogen pipeline is fixedly installed on the second vertical motion component (3). The second vertical motion component (3) drives the second grinding component (8) to move in the vertical direction. A second horizontal motion component (7) and a first horizontal motion component (6) are provided on the support frame (5) to drive the first vertical motion component (2) and the second vertical motion component (3) to slide in the horizontal direction. The structure of the first grinding assembly (4) is the same as that of the second grinding assembly (8). The first grinding assembly (4) is as follows: a fixed frame (401) is fixedly installed on the first vertical motion assembly (2), a second bracket (413) is provided at the top of the fixed frame (401), a first motor (402) is provided on the second bracket (413), the output shaft of the first motor (402) is fixedly connected to the transmission wheel (407), and an offset wheel is rotatably installed on the fixed frame (401). The spindle (408) has a tension wheel (404) eccentrically mounted on it. The tension wheel (404) is located on one side below the transmission wheel (407). A central shaft (410) is rotatably mounted on the fixed frame (401). A grinding wheel (406) is mounted on the central shaft (410). The grinding wheel (406) is located below the transmission wheel (407). The transmission wheel (407), the tension wheel (404), and the grinding wheel (406) are connected by a sanding belt (403).

2. The weld grinding mechanism for hydrogen pipelines according to claim 1, characterized in that: A first shaft bearing (411) is provided between the outer circumference of the eccentric shaft (408) and the inner circumference of the tension wheel (404).

3. The weld grinding mechanism for hydrogen transport pipelines according to claim 1, characterized in that: A second bearing (412) is provided between the outer circumference of the central shaft (410) and the inner circumference of the grinding wheel (406).

4. The weld grinding mechanism for hydrogen transport pipelines according to claim 1, characterized in that: The fixed frame (401) is equipped with a cylinder (405), and the piston rod of the cylinder (405) is connected to the eccentric shaft (408) through a connecting ring (409).

5. The weld grinding mechanism for hydrogen pipelines according to claim 1, characterized in that, The first horizontal motion component (6) is as follows: a first fixed plate (604) and a second fixed plate (608) are provided on the support frame (5), two first guide rods (606) are provided between the first fixed plate (604) and the second fixed plate (608), a first lead screw (605) located between the two first guide rods (606) is rotatably installed between the first fixed plate (604) and the second fixed plate (608), a second motor (601) for driving the first lead screw (605) to rotate is provided on the second fixed plate (608), the first lead screw (605) is threadedly connected to the first lead screw seat (607), slide rods (603) are provided on both sides of the first lead screw seat (607), and first horizontal sliding holes (602) that slide rods (603) in the horizontal direction are machined on both sides of the support frame (5), one end of one slide rod (603) is fixedly connected to the first vertical motion component (2), and the other end of the other slide rod (603) is fixedly connected to the second vertical motion component (3).

6. The weld grinding mechanism for hydrogen pipelines according to claim 1, characterized in that, The second horizontal motion component (7) is as follows: a third fixed plate (701) and a fourth fixed plate (706) are provided on the support frame (5), two second guide rods (705) are provided between the third fixed plate (701) and the fourth fixed plate (706), a second lead screw (702) located between the two second guide rods (705) is rotatably installed between the third fixed plate (701) and the fourth fixed plate (706), and a third motor (702) is provided on the fourth fixed plate (706) to drive the second lead screw (702) to rotate. 707), the second lead screw (702) is threadedly connected to the second lead screw seat (704). The second lead screw seat (704) is provided with a second slider (703) on both sides. The support frame (5) is machined with a second horizontal sliding hole (708) on both sides, which is slidably connected to the second slider (703) in the horizontal direction. One end of the second slider (703) on one side is slidably connected to the first vertical motion component (2) in the vertical direction, and the other end of the second slider (703) on the other side is slidably connected to the second vertical motion component (3) in the vertical direction.

7. The weld grinding mechanism for a hydrogen pipeline according to claim 5 or 6, characterized in that, The structure of the first vertical motion component (2) is the same as that of the second vertical motion component (3). The first vertical motion component (2) is as follows: a horizontal sliding plate (203) is provided on one side of the support frame (5). A vertical sliding hole (207) is machined on the horizontal sliding plate (203) to slide and connect with the second slider (703) in the vertical direction. A shaft hole (208) is machined on the horizontal sliding plate (203) to be clamped with the slide rod (603). Vertical sliding holes are respectively provided on both sides of the horizontal sliding plate (203). A straight guide rail (204) is provided. Each vertical guide rail (204) is slidably connected to a first slider (205) along the vertical direction. The first slider (205) is fixedly connected to a vertical sliding plate (206). A first bracket (202) is provided on a horizontal sliding plate (203). A screw jack (201) is provided on the first bracket (202). The output end of the screw jack (201) is fixedly connected to the vertical sliding plate (206). The vertical sliding plate (206) is fixedly connected to the first grinding assembly (4).

Images