Manufacturing method of horizontal continuous nitration pipeline reactor and its refrigerant circulation components

Abstract

This invention discloses a horizontal continuous nitration pipeline reactor and its refrigerant circulation component manufacturing method, belonging to the technical field of chemical pipeline reactors. The reactor mainly includes a cylindrical assembly, a stirring assembly, and a refrigerant circulation assembly, possessing advantages such as strong heat exchange capacity, large unit heat transfer area, and high safety. The core of the refrigerant circulation component manufacturing method is the use of a dedicated concentric feeding mechanism for components. This mechanism is equipped with coaxial and synchronously movable bolt chucks and nut chucks, each with radially movable inner and outer long beam claws. The concentric feeding mechanism precisely positions components such as angle steel, U-bolts, and gaskets, and automatically and efficiently fastens them to the spiral coil. This invention fundamentally solves the technical bottleneck caused by limited assembly space in the refrigerant circulation assembly, achieving efficient and precise automated assembly, and has significant engineering application value and promotional significance in the field of nitration pipeline reactors.

Claims

1. A horizontal continuous nitration pipeline reactor, comprising a cylindrical assembly (1), characterized in that: It also includes a stirring assembly (2) and a refrigerant circulation assembly (3); The stirring assembly (2) includes a stirring end cap (22) that is sealed and fixed to one end of the cylinder assembly (1); a drive unit (21) installed on the stirring end cap (22) is sealed and driven by a stirring shaft (23) disposed in the reaction chamber of the cylinder assembly (1); the end of the stirring shaft (23) is sealed and connected to the bearing of the refrigerant end cap (31) of the refrigerant circulation assembly (3), and the refrigerant end cap (31) is sealed and fixed to the other end of the cylinder assembly (1); The cylinder assembly (1) includes a main cylinder (11) and an outer jacket (12) sleeved around the main cylinder (11). A spiral guide plate (13) is fixedly connected in the cavity between the main cylinder (11) and the outer jacket (12). A chilled water inlet and outlet pipe (121) is connected to the outer jacket (12). A material inlet pipe (111), a material outlet pipe (112), a parameter measurement port (113), and a gas phase outlet pipe (114) are connected to the main cylinder (11). The refrigerant circulation assembly (3) also includes a spiral coil (32), the inlet and outlet pipes of the spiral coil (32) are sealed and fixed to the refrigerant end cap (31), and a plurality of angle steels (33) are evenly distributed around the spiral coil (32) and are clearance-fitted to the inner wall of the reaction chamber of the cylinder assembly (1); each turn of the spiral coil (32) is fixed to the angle steel (33) by a U-bolt assembly (35), and a gasket (36) is provided at the contact point between the spiral coil (32) and the angle steel (33).

2. The horizontal continuous nitration pipeline reactor according to claim 1, characterized in that: The drive unit (21) is a motor; the sealed transmission between the drive unit (21) and the stirring shaft (23) is achieved through a magnetic sealing structure; the inlet and outlet pipes of the spiral coil (32) are also welded with pipe connection flanges (37).

3. A method for manufacturing a refrigerant circulation assembly in a horizontal continuous nitration pipeline reactor according to any one of claims 1 to 2, characterized in that, The following steps are included: Step 1: Fix the spiral coil (32); Step 2: Prepare a concentric feeding mechanism (4); The concentric feeding mechanism (4) for the accessories includes a bolt chuck (451) and a nut chuck (452) that are coaxially arranged and have the same orientation of the clamping claws; the bolt chuck (451) and the nut chuck (452) are both on the same central axis as the spiral coil (32) and can move synchronously along the central axis; The bolt chuck (451) is provided with a plurality of circumferentially evenly distributed inner long beam claws (4511) that can move radially along the bolt chuck (451). The inner long beam claws (4511) are arranged with a plurality of bolt contour grooves (4512) for accommodating U-bolts (352) along their length direction. The nut chuck (452) is provided with a plurality of circumferentially evenly distributed outer beam claws (4521) that can move radially along the nut chuck (452); the outer beam claws (4521) are provided with a plurality of pre-tightening components (47) along their length direction, and the plurality of pre-tightening components (47) on each outer beam claw (4521) correspond one-to-one with the U-bolts (352) on the corresponding inner beam claws (4511); Each preload assembly (47) includes two magnetic nut heads (471), the central axes of which are collinear with the central axes of the two screw sections of the corresponding U-bolt (352); the magnetic nut heads (471) are rotatably installed in the outer beam claws (4521) and are connected to the nut drive mechanism (46) for transmission. The end of the magnetic nut tip (471) is provided with a cavity for accommodating and driving the nut (351), and a guide outer cylinder (472) that can reciprocate axially is provided in the axial cavity of the magnetic nut tip (471). The radial movement trajectories of the inner long beam claw (4511) and the outer long beam claw (4521) are collinear in projection onto a plane perpendicular to the central axis of the spiral coil (32); The outer beam claw (4521) is also provided with an angle steel receiving groove (4522) for accommodating the angle steel (33) along its length direction. Step 3: Install the fastening components on the concentric feeding mechanism (4) of the accessories, including embedding the U-bolt (352) into the bolt profile groove (4512); placing the movable nut (351) in the cavity of the magnetic nut head (471); fixing the angle steel (33) in the angle steel receiving groove (4522); and putting the washer (36) on the guide outer cylinder (472) and temporarily fixing the washer (36) to the angle steel (33). Step 4: Move the concentric feeding mechanism (4) of the accessories after step 3 toward the spiral coil (32), so that the inner long beam claw (4511) and the outer long beam claw (4521) are respectively located on the inner and outer arc sides of the spiral coil (32), and make the screw part of each U-bolt (352) aligned with the gap between two adjacent turns of the spiral coil (32); Step 5: Drive the inner long beam claw (4511) to expand radially outward and drive the outer long beam claw (4521) to contract radially inward, so that the threaded part of the U-bolt (352) passes through the gap of the coil and then passes through the corresponding holes on the washer (36) and the angle steel (33) in sequence until it contacts the moving nut (351); Step 6: Drive the nut drive mechanism (46) to rotate the moving nut (351) so that it engages with the threaded part of the U-bolt (352) to a preset tightness; Step 7: Release the angle steel (33) from the outer long beam claw (4521); drive the inner long beam claw (4511) to retract radially inward and drive the outer long beam claw (4521) to expand radially outward; then move the concentric feeding mechanism (4) of the accessories away from the spiral coil (32) along the central axis direction. Step 8: Tighten the initially engaged moving nut (351) with final torque; Step 9: Weld the refrigerant end cap (31) and the pipe connection flange (37) to complete the assembly.

4. The method for manufacturing the refrigerant circulation component according to claim 3, characterized in that: The nut drive mechanism (46) includes a drive wheel (467) driven by a nut power unit, and a plurality of multi-groove drive wheels (462) connected in series via an upper belt (464) and a lower belt (465); the multi-groove drive wheels (462) are rotatably mounted on the outer beam claw (4521), and each of the multi-groove drive wheels (462) drives two magnetic nut heads (471) belonging to the same set of pre-tightening components (47) via two oblique belts (463).

5. The method for manufacturing the refrigerant circulation component according to claim 3, characterized in that: In step three, the gasket (36) is temporarily fixed to the angle steel (33) by adhesive bonding.

6. The method for manufacturing the refrigerant circulation assembly according to claim 3, characterized in that: The pre-tightening assembly (47) also includes a locking mechanism for temporarily fixing the gasket (36) to the angle steel (33) in step three; The locking mechanism includes a guide pin (473) that is axially movable within the guide outer cylinder (472). The guide needle (473) includes a limiting part (4732) that abuts against the upper end face of the guide outer cylinder (472), and a needle body (4733) that is in clearance fit with the guide outer cylinder (472). The tail section of the needle body (4733) forms multiple elastic flaps (4735) through a cut. The needle body (4733) also includes an upper body (4734) and a tail body (4736) with a diameter smaller than that of the upper body (4734), with an arc transition between the two; an annular groove (4731) is provided at the bottom of the upper body (4734). On the circumferential sidewall at the end of the guide outer cylinder (472), a plurality of ball movement holes (4721) are provided for the ball (474) to move radially. The ball (474) is adapted to the annular groove (4731), and when the ball (474) is embedded in the annular groove (4731), part of the ball (474) protrudes out of the outer surface of the guide outer cylinder (472). A reset spring (475) is provided between the upper end face of the guide outer cylinder (472) and the limiting baffle (4523) fixed on the outer long beam claw (4521).

7. The method for manufacturing the refrigerant circulation assembly according to claim 3, characterized in that: The bolt contour groove (4512) is provided with a spring plunger (4513) for pre-fixing U-bolts (352). The angle steel (33) is fixed in the angle steel receiving groove (4522) by the angle steel clamping assembly (48); the angle steel clamping assembly (48) includes a ball head handle (481) threadedly connected to the outer long beam claw (4521), and a clamping plate fixedly disposed at the end of the ball head handle (481).

8. The method for manufacturing the refrigerant circulation component according to claim 3, characterized in that: The concentric feeding mechanism (4) for the accessories is a component of the rapid assembly equipment for refrigerant circulation components; the rapid assembly equipment for refrigerant circulation components also includes a continuous assembly conveyor rail (5) for coils. The continuous assembly and conveying rail (5) for the coil includes a basic support beam (51) and multiple chuck brackets spaced apart along its length. The plurality of chuck supports include a double-sided chuck support (521) and an inner radial chuck support (53) disposed in the middle section of the foundation support beam (51), and a lifting chuck support (54) and an outer radial chuck support (55) respectively disposed at the two ends of the foundation support beam (51); wherein the lifting chuck support (54) is disposed opposite to the double-sided chuck support (521), and the outer radial chuck support (55) is disposed opposite to the inner radial chuck support (53); The double-sided chuck bracket (521) is fixed with a cap chuck (522) and a rubber rod chuck (523) arranged coaxially and facing away from each other; the rubber rod chuck (523) is provided with multiple rubber clamping rods (524) for clamping the spiral coil (32); the cap chuck (522) is used to clamp the refrigerant end cap (31). Between the lifting chuck bracket (54) and the double-sided chuck bracket (521), there is a lifting sliding assembly (56) for the spiral coil (32) to slide. Between the inner radial chuck bracket (53) and the outer radial chuck bracket (55), there is an accessory moving assembly (57) for sliding the accessory concentric feeding mechanism (4) and for driving the concentric feeding mechanism (4) to rotate around its own central axis.

9. The method for manufacturing the refrigerant circulation assembly according to claim 8, characterized in that: The capping chuck (522) includes a plurality of circumferentially distributed capping claws (5221) that can move radially along the capping chuck (5222); each capping claw (5221) is slidably provided with a capping support claw (5222); the capping support claw (5222) is used to support the refrigerant end cap (31) and moves together with the capping claw (5221) as the capping claw (5221) moves radially inward to press the refrigerant end cap (31). The lifting sliding assembly (56) includes a lifting slide rod (561) fixedly mounted between the lifting chuck bracket (54) and the double-sided chuck bracket (521), and a lifting slider (562) for lifting the spiral coil (32) is slidably mounted on the lifting slide rod (561). The accessory moving assembly (57) includes two accessory turntables (571) respectively mounted on the inner radial chuck bracket (53) and the outer radial chuck bracket (55), and an accessory slide rod (572) is fixedly mounted between the two accessory turntables (571); the bolt chuck (451) and the nut chuck (452) are slidably connected to the accessory slide rod (572).

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