Manufacturing method of hydrogenation reactor cylinder for petrochemical industry

Abstract

The invention provides a manufacturing method of a hydrogenation reactor cylinder for the petrochemical industry. Comprising the steps that 1, a ring piece blank (4) is forged through a free forging press (2); step 2, rolling into a cylinder blank (7) by a horizontal ring rolling mill (5); 3, a vertical die-free strong flexible opposite-wheel spinning machine (8) is used for spinning to form a single barrel (10); and step 4, welding by using an automatic welding machine (11) to prepare the ultra-long hydrogenation reactor cylinder (13). The cylinder of the ultra-large hydrogenation reactor is manufactured in a horizontal ring rolling and vertical dieless powerful flexible spinning mode, longitudinal straight welding seams can be eliminated, the total welding seam number and the welding workload during manufacturing of the hydrogenation reactor are greatly reduced, and therefore the overall performance of the cylinder of the hydrogenation reactor is improved, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The invention relates to the field of nuclear power petrochemicals, and in particular to a method for manufacturing a hydrogenation reactor cylinder for the petrochemical industry. Background Art

[0002] The hydrogenation reactor is a very important equipment in organic chemistry laboratories and actual production processes. It can be used not only as a container for hydrogenation reactions, but also in situations where liquids and gases need to be fully mixed. Hydrogenation reactors are often used to convert the most difficult heavy part of the petroleum industry, residual oil, into light oil by hydrogenation, thereby producing gasoline, diesel, etc. Hydrogenation reactors are large and heavy, with a diameter of up to 4 meters, a length of more than 70 meters, and a weight of more than 3,000 tons.

[0003] Existing hydrogenation reactors are all made by steel plate coiling and welding. Generally, thick steel plates with a wide width (about 3 meters) are coiled and welded into a cylindrical body, and then the cylindrical bodies are welded into a very long cylinder by narrow gap welding. This processing method is relatively mature, but the welding volume is huge. Due to the presence of a large number of welds, the overall performance of the hydrogenation reactor cylinder is also reduced to a certain extent. Summary of the invention

[0004] The purpose of the present invention is to provide a method for manufacturing a hydrogenation reactor cylinder for the petrochemical industry.

[0005] The present invention is achieved through the following technical solutions:

[0006] The present invention relates to a method for manufacturing a barrel of a hydrogenation reactor for the petrochemical industry, comprising the following steps:

[0007] Step 1, preparation of the ring blank 4:

[0008] A free forging press 2 is used to perform a forging process 3 on the steel ingot blank 1, and the material performance is improved by repeated upsetting, drawing, and re-upsetting processes, and then perforation is performed, and then a horse bar expansion forging is performed to complete the precise forging to form a ring blank 4;

[0009] Step 2, preparation of barrel blank 7:

[0010] A horizontal ring rolling machine 5 is used to perform a ring rolling process 6 on the ring blank 4, and the ring blank 4 is rolled to the required precise inner and outer diameter dimensions to form a cylinder blank 7;

[0011] Step 3, preparation of the single-piece cylinder 10:

[0012] A vertical dieless strong flexible wheel spinning machine 8 is used to process the barrel blank 7 with a dieless spinning process 9, so that the barrel blank 7 reaches the required precise thickness and the height is doubled to 6 to 9 meters to form a single-piece barrel 10;

[0013] Step 4, preparation of hydrogenation reactor cylinder 13:

[0014] The single-piece cylinder 10 with a relatively long length is welded section by section by an automatic welding machine 11 using a narrow gap welding process 12 to form a thin-walled ultra-long cylinder, namely, a hydrogenation reactor cylinder 13 .

[0015] Preferably, the wheel spinning machine 8 comprises: an inner rotating component and an outer rotating component; the inner rotating component and the outer rotating component are operatively connected.

[0016] Preferably, the inner-rotating component includes an inner-rotating wheel seat 17 and an inner-rotating wheel 18 ; and the outer-rotating component includes an outer-rotating wheel seat 14 and an outer-rotating wheel 15 .

[0017] Preferably, the epitrochoid 15 is arranged at the lower end of the epitrochoid seat 14, and the hypotrochoid 18 is arranged at the lower end of the hypotrochoid seat 17. The epitrochoid 15 is mounted on the epitrochoid seat 14, and is fed horizontally in the third direction to adjust the spinning depth of the epitrochoid 15 relative to the outer surface of the cylindrical workpiece 16 to be processed; the hypotrochoid 18 is mounted on the hypotrochoid seat 17, and is fed horizontally in the second direction to adjust the spinning depth of the hypotrochoid 18 relative to the inner surface of the cylindrical workpiece 16 to be processed; the epitrochoid 15 and the hypotrochoid 18 can respectively rotate in the second rotation direction and the first rotation direction with a load at a matching speed; the cylindrical workpiece 16 to be processed can rotate in the first rotation direction with a load around the central axis of the equipment.

[0018] Preferably, the outer wheel seat 14 and the inner wheel seat 17 are arranged in parallel.

[0019] Preferably, the epitrochoid 15 and the hypotrochoid 18 are arranged to cooperate with each other.

[0020] The present invention has the following advantages:

[0021] (1) The present invention adopts horizontal ring rolling and vertical dieless strong flexible spinning to manufacture the cylinder of the super-large hydrogenation reactor, which can eliminate the longitudinal straight welds and greatly reduce the overall number of welds and welding workload during the manufacture of the hydrogenation reactor, thereby improving the overall performance of the hydrogenation reactor cylinder and reducing the manufacturing cost.

[0022] (2) The present invention adopts vertical moldless strong flexible spinning equipment for spinning, eliminating the longitudinal straight weld, so that the cylinder reaches the required thickness and the height is doubled to reach a height of 6 to 9 meters. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the process of manufacturing a barrel of a hydrogenation reactor for the petrochemical industry involved in the present invention;

[0024] Figure 2 It is a schematic diagram of the dieless spinning process of the cylinder in the method of the present invention;

[0025] The accompanying drawings are marked with: 1 is a steel ingot blank, 2 is a free forging press, 3 is a forging process, 4 is a ring blank, 5 is a horizontal ring rolling machine, 6 is a ring rolling process, 7 is a cylinder blank, 8 is a double-wheel spinning machine, 9 is a dieless spinning process, 10 is a single-piece cylinder, 11 is an automatic welding machine, 12 is a narrow gap welding process, 13 is a hydrogenation reactor cylinder, 14 is an outer rotating wheel seat, 15 is an outer rotating wheel, 16 is a cylinder workpiece to be processed, 17 is an inner rotating wheel seat, and 18 is an inner rotating wheel. DETAILED DESCRIPTION

[0026] The present invention is described in detail below in conjunction with specific embodiments. It should be noted that the following embodiments are only further descriptions of the present invention, but the protection scope of the present invention is not limited to the following embodiments.

[0027] Example 1

[0028] The manufacturing method of the barrel of the hydrogenation reactor for the petrochemical industry in this embodiment is shown in Figure 1 As shown, the following steps are included:

[0029] Step 1, preparation of the ring blank 4:

[0030] A free forging press 2 is used to perform a forging process 3 on the steel ingot blank 1, and the material performance is improved by repeated upsetting, drawing, and re-upsetting processes, and then perforation is performed, and then a horse bar expansion forging is performed to complete the precise forging to form a ring blank 4;

[0031] Step 2, preparation of barrel blank 7:

[0032] A horizontal ring rolling machine 5 is used to perform a ring rolling process 6 to roll the ring blank 4 to the required precise inner and outer diameter dimensions to form a cylinder blank 7;

[0033] Step 3, preparation of the single-piece cylinder 10:

[0034] A vertical dieless strong flexible wheel spinning machine 8 is used to process the barrel blank 7 with a dieless spinning process 9, so that the barrel blank 7 reaches the required precise thickness and the height is doubled to 6 to 9 meters to form a single-piece barrel 10;

[0035] Step 4, preparation of hydrogenation reactor cylinder 13:

[0036] The single-piece cylinder 10 with a relatively long length is welded section by section by an automatic welding machine 11 using a narrow gap welding process 12 to form a thin-walled ultra-long cylinder, namely, a hydrogenation reactor cylinder 13 .

[0037] The wheel spinning machine 8 comprises: an inner rotating component and an outer rotating component; the inner rotating component and the outer rotating component are operatively connected.

[0038] The inner rotating component includes: an inner rotating wheel seat 17 and an inner rotating wheel 18; the outer rotating component includes: an outer rotating wheel seat 14 and an outer rotating wheel 15; the outer rotating wheel seat 14 is arranged in parallel with the inner rotating wheel seat 17; the outer rotating wheel 15 is arranged to cooperate with the inner rotating wheel 18.

[0039] The outer wheel 15 is arranged at the lower end of the outer wheel seat 14, and the inner wheel 18 is arranged at the lower end of the inner wheel seat 17. The outer wheel 15 is mounted on the outer wheel seat 14, and is fed horizontally along the third direction to adjust the spinning depth of the outer wheel 15 relative to the outer surface of the cylindrical workpiece 16 to be processed; the inner wheel 18 is mounted on the inner wheel seat 17, and is fed horizontally along the second direction to adjust the spinning depth of the inner wheel 18 relative to the inner surface of the cylindrical workpiece 16 to be processed; the outer wheel 15 and the inner wheel 18 can respectively rotate in the second rotation direction and the first rotation direction with a matching speed with a load; the cylindrical workpiece 16 to be processed can rotate in the first rotation direction with a load around the central axis of the equipment, see Figure 2 shown.

[0040] In the dieless spinning process involved in the method of the present invention, the outer wheel seat 14 drives the outer wheel 15 to feed horizontally along the third direction toward the center of the equipment, and stops at an appropriate outer diameter of the cylindrical workpiece 16 to be processed, so as to ensure the set outer diameter of the outer surface of the single-piece cylindrical body 10; the inner wheel seat 17 drives the inner wheel 18 to feed horizontally along the second direction away from the center of the equipment, and stops at an appropriate inner diameter of the cylindrical workpiece 16 to be processed, so as to ensure the set inner diameter of the inner surface of the single-piece cylindrical body 10; then the cylindrical workpiece to be processed Driven by the main shaft of the equipment, the part 16 rotates in the first direction at a set speed, the outer wheel 15 rotates in the second direction at a set matching speed, and the inner wheel 18 rotates in the first direction at a set matching speed; finally, the cylindrical workpiece 16 to be processed moves in the first direction at a set speed driven by the main shaft of the equipment, and the outer wheel 15 and the inner wheel 18 gradually cut into the cylindrical workpiece 16 to be processed from the top, and under the joint action of the main shaft, the outer wheel 15 and the inner wheel 18, the cylindrical moldless spinning process 9 is completed.

[0041] The present invention provides a new method for manufacturing a hydrogenation reactor cylinder for the petrochemical industry. The greatest advantage is that the hydrogenation reactor manufactured in this way completely eliminates longitudinal straight welds, reduces overall welds, and greatly improves overall performance, thereby effectively improving the overall performance of the cylinder.

[0042] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art may make various modifications or variations within the scope of the claims, which will not affect the essence of the present invention.

Claims

1. A method for manufacturing a hydrogenation reactor cylinder for the petrochemical industry, characterized in that: The following steps are involved: Step 1, preparation of the ring blank (4): A free forging press (2) is used to perform a forging process (3) on a steel ingot blank (1), and a ring blank (4) is formed by repeated upsetting, drawing, re-upsetting, perforation, and horse bar expansion forging, and precision forging; Step 2, preparation of barrel blank (7): A horizontal ring rolling machine (5) is used to perform a ring rolling process (6) on the ring blank (4), and the ring blank (4) is rolled to the required inner and outer diameters to form a cylinder blank (7); Step 3, preparation of a single cylinder (10): A vertical dieless strong flexible wheel spinning machine (8) is used to process the barrel blank (7) with a dieless spinning process (9) to a required thickness of the barrel blank (7) and a height of 6 to 9 meters to form a single-piece barrel (10); Step 4, preparation of hydrogenation reactor barrel (13): The single-piece cylinder (10) is welded section by section using a narrow gap welding process (12) of an automatic welding machine (11) to obtain a hydrogenation reactor cylinder (13).

2. The method for manufacturing a barrel of a hydrogenation reactor for the petrochemical industry according to claim 1, characterized in that: The wheel spinning machine (8) comprises: an inner rotating component and an outer rotating component; the inner rotating component and the outer rotating component are operatively connected.

3. The method for manufacturing a barrel of a hydrogenation reactor for the petrochemical industry according to claim 2, characterized in that: The inner rotating component comprises: an inner rotating wheel seat (17) and an inner rotating wheel (18); and the outer rotating component comprises: an outer rotating wheel seat (14) and an outer rotating wheel (15).

4. The method for manufacturing a barrel of a hydrogenation reactor for the petrochemical industry according to claim 3, characterized in that: The epitrochoid (15) is arranged at the lower end of the epitrochoid seat (14), and the hypotrochoid (18) is arranged at the lower end of the hypotrochoid seat (17).

5. The method for manufacturing a barrel of a hydrogenation reactor for the petrochemical industry according to claim 3, characterized in that: The outer wheel seat (14) and the inner wheel seat (17) are arranged in parallel.

6. The method for manufacturing a barrel of a hydrogenation reactor for the petrochemical industry according to claim 3, characterized in that: The epitrochoid (15) and the hypotrochoid (18) are arranged to cooperate with each other.

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