Special device for mounting inner cylinder of slender double-cavity pressure container

Abstract

The utility model relates to the field of auxiliary installation of pressure vessels, in particular to a special device for installing an inner cylinder of a long and thin double-cavity pressure vessel, which comprises an inner cylinder horizontal consignment device. The inner barrel horizontal consignment device comprises an inner barrel supporting assembly, a transportation guide rail assembly and a tail traction assembly. The inner barrel supporting assembly comprises a vertically-arranged supporting column and auxiliary supporting rods symmetrically arranged on the two sides of the supporting column, one end of the supporting column and one end of each auxiliary supporting rod are arranged on the conveying guide rail assembly in a rolling mode, and the conveying guide rail assembly is fixedly arranged on the inner wall of the thin and long pressure container outer barrel; the device is simple in structure and convenient to use, the inner cylinder of the pressure vessel can be conveniently installed, meanwhile, the coaxiality of the inner cylinder of the pressure vessel and the outer cylinder of the pressure vessel can be adjusted through the coaxiality adjusting device, installation is stable, and the installation quality can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of auxiliary installation of pressure vessels, in particular to a special device for installing an inner cylinder of an elongated double-cavity pressure vessel. Background Art

[0002] With the trend of large-scale pressure vessels and complex processes, the manufacturing difficulty of pressure vessels containing slender inner cylindrical internals installed in a narrow space is increasing. The core equipment in the naphtha adsorption separation device is the adsorption tower, which is mainly composed of internal parts such as inner cylinder, outer cylinder, and support grid. Its manufacturing and installation precision quality requirements are very high, especially the installation precision control of the inner cylinder and the outer cylinder. After the inner and outer cylinders are heat treated separately, the inner cylinder and the outer cylinder are constructed and welded using special tooling. During the installation process, the concentricity of the inner cylinder and the outer cylinder should be controlled within 3mm, and the verticality deviation of the inner cylinder after installation should not exceed 6mm. For welded structural parts and for the inner cylinder with a length of nearly 23m, the construction difficulty is very large.

[0003] Traditionally, the internal parts of this type of equipment are installed vertically, but due to the small working space, poor welding conditions, high construction difficulty, high welding quality requirements, and high installation precision, if the slender inner cylinder is installed vertically, the efficiency will be low, the construction period will be long, and the safety risk will be high. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a special device for installing an inner cylinder of a slender double-chamber pressure vessel, which can realize the installation of an extra-heavy and extra-long inner cylinder inside a tower, so that it can be installed stably in a narrow space, and can be accurately aligned and fine-tuned into place, which not only ensures the concentricity of the inner cylinder installation of the equipment, but also solves the problem of construction efficiency, thereby saving manufacturing costs.

[0005] The utility model discloses a special device for installing an inner cylinder of an elongated double-chamber pressure vessel, comprising an inner cylinder horizontal consignment device; the inner cylinder horizontal consignment device comprises an inner cylinder support assembly, a transport guide rail assembly and a tail traction assembly;

[0006] The inner cylinder support assembly comprises a vertically arranged support column and auxiliary support rods symmetrically arranged on both sides of the support column, one end of the support column and the auxiliary support rod are both rollingly arranged on the transport guide rail assembly, and the transport guide rail assembly is fixedly arranged on the inner wall of the outer cylinder of the slender pressure vessel, and the other ends of the support column and the auxiliary support rod are respectively connected to a cushion block for supporting the inner cylinder through a coaxiality adjustment device;

[0007] The tail traction assembly is arranged outside the outer cylinder, and one end of the tail traction assembly extends into the outer cylinder to connect with and tow the inner cylinder.

[0008] Preferably, it also includes a positioning anti-deviation device, which includes a plurality of inner cylinder positioning supports, and the inner cylinder is fixedly connected to the pre-welded parts fixedly connected to the outer cylinder through the inner cylinder positioning supports.

[0009] Preferably, a plurality of inner cylinder positioning supports are provided, and the inner cylinder positioning supports are all arranged along the axial direction of the outer cylinder, and the distance between two adjacent inner cylinder positioning supports is 3-5m.

[0010] Preferably, the inner tube positioning support comprises an outer tube support ring and an inner tube support ring, wherein the outer tube support ring is arranged inside the outer tube, and the inner tube support ring is sleeved outside the inner tube, and the outer tube support ring and the inner tube support ring are welded together by several seamless steel pipes to form a "M" shaped cross structure.

[0011] Preferably, the coaxiality adjustment device comprises a fine-tuning screw, one end of which is a smooth rod, the other end of which is provided with an external thread, and the middle of which is provided with an adjustment hole for inserting a tool to rotate the fine-tuning screw;

[0012] One end of the fine-tuning screw rod is rotatably connected to a blind hole arranged on the connected cushion block, and the other end is threadedly connected to a threaded hole arranged at the end of the connected support column or auxiliary support rod.

[0013] Preferably, the angle between the auxiliary support rod and the support column is 50-75 degrees;

[0014] The two auxiliary support rods are fixedly connected to the support column through connecting rods respectively;

[0015] An arc-shaped pad connected to the inner cylinder is fixedly connected to a side surface of the pad away from the fine-tuning screw.

[0016] Preferably, a plurality of inner cylinder support assemblies are arranged along the axial direction of the outer cylinder, and the distance between two adjacent inner cylinder support assemblies is 5-8 times the diameter of the inner cylinder.

[0017] Preferably, the transport guide rail assembly comprises support guide rails fixedly arranged on the inner wall of the outer cylinder corresponding to the support columns and auxiliary guide rails fixedly arranged on the inner wall of the outer cylinder corresponding to the auxiliary support rods respectively;

[0018] The supporting guide rail and the auxiliary guide rail are parallel to each other and are both arranged along the axial direction of the outer cylinder;

[0019] A rolling device is provided on one end of the support column connected to the transport guide rail assembly, and the support column is rollingly connected to the support guide rail through the rolling device;

[0020] The auxiliary support rod is rollingly connected to the auxiliary guide rail via a rolling device.

[0021] Preferably, the rolling device comprises two ear plates arranged parallel to each other, a roller is arranged in the area between the two ear plates, and the roller is rotatably connected to the two ear plates through a pin shaft;

[0022] One end of the ear plate is fixedly connected to the end of the support column or the auxiliary support rod, and the roller protrudes from the ear plate in a direction away from the support column or the auxiliary support rod and is rollingly connected to the support guide rail or the auxiliary guide rail.

[0023] Preferably, the tail traction assembly includes a fixed support, one end of the outer tube is open, and the other end is closed, a through hole is provided on the closed end of the outer tube, and the fixed support is provided outside the closed end of the outer tube;

[0024] The fixed support is connected to a fixed pulley, a steel wire rope is wound around the fixed pulley, a fall chain is arranged at the end of the steel wire rope, and the steel wire rope and the fall chain pass through the through hole arranged at the end of the outer cylinder and extend into the inner part of the outer cylinder for connecting with the inner cylinder;

[0025] The rotation axis of the fixed pulley and the central axis of the outer cylinder are located on the same horizontal plane;

[0026] The distance between the fixed support and the outer cylinder is 3-5m.

[0027] The utility model has a simple structure and is easy to use. It can realize the convenient installation of the inner cylinder of the pressure vessel. At the same time, the coaxiality adjustment device can be used to adjust the coaxiality of the inner cylinder of the pressure vessel and the outer cylinder of the pressure vessel. The installation is stable and the installation quality can be guaranteed. The positioning anti-deviation device ensures that the coaxiality of the horizontal installation alignment will not be offset due to the influence of transportation or hoisting, thereby ensuring the vertical installation accuracy of the equipment.

[0028] The utility model uses a fixed support 3-5m outside the closed end of the outer cylinder of the slender pressure vessel, the fixed support should be set on the axis of the cylinder, the fixed support is connected to a fixed pulley, a steel wire rope is wound around the fixed pulley, a fall chain is set at the end of the steel wire rope, the steel wire rope and the fall chain pass through the outer cylinder of the pressure vessel and are connected to the inner cylinder of the pressure vessel, so that the operation is convenient and the horizontal installation is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the utility model during the installation process of the slender pressure vessel.

[0030] Figure 2 Schematic diagram of the installation of the inner cylinder of a slender pressure vessel.

[0031] Figure 3 This is a schematic diagram of the inner tube positioning support.

[0032] Figure numerals: 1-support guide rail, 2-roller, 3-ear plate, 4-pin shaft, 5-support column, 6-fine-tuning screw, 7-arc pad, 8-fixed support, 9-fixed pulley, 10-fall chain, 11-traveling crane, 12-outer cylinder support ring, 13-inner cylinder support ring, 14-inner cylinder positioning support. DETAILED DESCRIPTION

[0033] The utility model discloses a special device for installing an inner cylinder of an elongated double-chamber pressure vessel, comprising an inner cylinder horizontal consignment device; the inner cylinder horizontal consignment device comprises an inner cylinder support assembly, a transport guide rail assembly and a tail traction assembly;

[0034] The inner tube support assembly comprises a vertically arranged support column 5 and auxiliary support rods symmetrically arranged on both sides of the support column 5, one end of the support column 5 and the auxiliary support rod are both rollingly arranged on the transport guide rail assembly, and the transport guide rail assembly is fixedly arranged on the inner wall of the outer tube of the slender pressure vessel, and the other ends of the support column 5 and the auxiliary support rod are respectively connected with a pad for supporting the inner tube through a coaxiality adjustment device;

[0035] The tail traction assembly is arranged outside the outer cylinder, and one end of the tail traction assembly extends into the outer cylinder to connect with and tow the inner cylinder.

[0036] It also includes a positioning anti-deviating device, which includes a plurality of inner cylinder positioning supports 14, and the inner cylinder is fixedly connected to the pre-welded parts fixedly connected to the outer cylinder through the inner cylinder positioning supports 14.

[0037] There are multiple inner cylinder positioning supports 14, and the inner cylinder positioning supports 14 are all arranged along the axial direction of the outer cylinder, and the distance between two adjacent inner cylinder positioning supports 14 is 3-5m.

[0038] The inner cylinder positioning support 14 includes an outer cylinder support ring 12 and an inner cylinder support ring 13, wherein the outer cylinder support ring 12 is arranged inside the outer cylinder, and the inner cylinder support ring 13 is sleeved outside the inner cylinder, and the outer cylinder support ring 12 and the inner cylinder support ring 13 are welded together by a plurality of seamless steel pipes to form a "M"-shaped cross structure, that is, the outer cylinder support ring 12 and the inner cylinder support ring 13 are connected by a plurality of seamless steel pipes, and the angle between adjacent seamless steel pipes is 45 degrees, and the outer cylinder support ring 12 and the inner cylinder support ring 13 are concentrically arranged, and the seamless steel pipes are all arranged along the radial direction of the outer cylinder support ring 12.

[0039] The coaxiality adjustment device comprises a fine-tuning screw 6, one end of which is a polished rod, and the other end is provided with an external thread, and the middle of the fine-tuning screw 6 is provided with an adjustment hole for inserting a tool to rotate the fine-tuning screw 6;

[0040] The fine-tuning screw rod 6 is provided with one end of a polished rod rotatably connected to a blind hole provided on the connected cushion block, and the other end is threadedly connected to a threaded hole provided at the end of the connected support column 5 or the auxiliary support rod.

[0041] The angle between the auxiliary support rod and the support column 5 is 50-75 degrees;

[0042] The two auxiliary support rods are fixedly connected to the support column 5 through connecting rods respectively;

[0043] An arc-shaped pad 7 connected to the inner tube is fixedly connected to the side surface of the pad away from the fine-tuning screw 6.

[0044] A plurality of inner cylinder support assemblies are arranged along the axial direction of the outer cylinder, and the distance between two adjacent inner cylinder support assemblies is 5-8 times the diameter of the inner cylinder.

[0045] The transport guide rail assembly comprises a support guide rail 1 fixedly arranged on the inner wall of the outer cylinder corresponding to the support column 5 and auxiliary guide rails fixedly arranged on the inner wall of the outer cylinder corresponding to the auxiliary support rods;

[0046] The support guide rail 1 and the auxiliary guide rail are parallel to each other and are both arranged along the axial direction of the outer cylinder;

[0047] A rolling device is provided on one end of the support column 5 connected to the transport guide rail assembly, and the support column 5 is rollingly connected to the support guide rail 1 through the rolling device;

[0048] The auxiliary support rod is rollingly connected to the auxiliary guide rail via a rolling device.

[0049] The rolling device comprises two ear plates 3 arranged parallel to each other, a roller 2 is arranged in the area between the two ear plates 3, and the roller 2 is rotatably connected to the two ear plates 3 through a pin shaft 4;

[0050] One end of the ear plate 3 is fixedly connected to the end of the support column 5 or the auxiliary support rod, and the roller 2 protrudes from the ear plate 3 in the direction away from the support column 5 or the auxiliary support rod and is rollingly connected to the support guide rail 1 or the auxiliary guide rail.

[0051] The tail traction assembly includes a fixed support 8, one end of the outer tube is open, and the other end is closed. A through hole is provided on the closed end of the outer tube, and the fixed support 8 is arranged outside the closed end of the outer tube;

[0052] The fixed support 8 is connected to a fixed pulley 9, a steel wire rope is wound around the fixed pulley 9, a fall chain 10 is arranged at the end of the steel wire rope, and the steel wire rope and the fall chain 10 pass through the through hole arranged at the end of the outer cylinder and extend into the inner part of the outer cylinder for connecting the inner cylinder;

[0053] The rotation axis of the fixed pulley 9 and the central axis of the outer cylinder are located on the same horizontal plane;

[0054] The distance between the fixed support 8 and the outer cylinder is 3-5m.

[0055] When in use, before installation, determine the orientation of the inner tube and the outer tube according to the opening orientation of the slender pressure vessel, first install the support guide rail 1 and the auxiliary guide rail on the inner wall of the outer tube, and the support column 5 and the auxiliary support rod are fixedly connected by a connecting rod to ensure the stability of the installation process. The front end of the inner tube is placed on the inner tube support assembly, and the rear end is kept balanced by the crane 11. The coaxiality of the inner tube and the outer tube is adjusted by the fine-tuning screw 6. After the adjustment is completed, the slender inner tube is slowly moved to the end of the outer tube where the through hole is set, that is, the head side, by using the cooperation of the fall chain 10, the fixed support 8 and the crane 11. During the movement, a set of inner tube support assemblies is set every 6 meters, and an inner tube positioning support 14 is set every 4 meters. The inner tube positioning support 14 is used to realize the supporting effect between the inner tube and the outer tube. When the inner tube moves to the installation position, it is welded and installed with the cooperation of the crane 11. After the installation of the frontmost fixed support between the inner tube and the outer tube is completed, the frontmost inner tube support assembly and the inner tube positioning support 14 are withdrawn backwards. While withdrawing the inner cylinder support assembly and the inner cylinder positioning support 14, install the fixed support between the inner cylinder and the outer cylinder until the last circle of the inner cylinder and the outer cylinder support is installed. After all the fixed supports are installed, the crane 11 can be removed, and the support guide rail 1 and the auxiliary guide rail can be removed section by section.

[0056] Through practical demonstration, the utility model can safely and effectively solve the installation problem of the inner cylinder of the pressure vessel in a narrow space, can ensure the installation accuracy requirements under the premise of ensuring safety, not only improves the production efficiency, but also saves the production cost.

Claims

1. A special device for installing the inner cylinder of an elongated double-chamber pressure vessel, characterized in that: It includes an inner cylinder horizontal consignment device; the inner cylinder horizontal consignment device includes an inner cylinder support assembly, a transport guide rail assembly and a tail traction assembly; The inner cylinder support assembly comprises a vertically arranged support column and auxiliary support rods symmetrically arranged on both sides of the support column, one end of the support column and the auxiliary support rod are both rollingly arranged on the transport guide rail assembly, and the transport guide rail assembly is fixedly arranged on the inner wall of the outer cylinder of the slender pressure vessel, and the other ends of the support column and the auxiliary support rod are respectively connected to a cushion block for supporting the inner cylinder through a coaxiality adjustment device; The tail traction assembly is arranged outside the outer cylinder, and one end of the tail traction assembly extends into the outer cylinder to connect with and tow the inner cylinder.

2. A dedicated device for installing an inner cylinder of an elongated double-chamber pressure vessel as claimed in claim 1, characterized in that: It also includes a positioning anti-deviation device, which includes a plurality of inner cylinder positioning supports, and the inner cylinder is fixedly connected to the pre-welded parts fixedly connected to the outer cylinder through the inner cylinder positioning supports.

3. A dedicated device for installing the inner cylinder of an elongated double-chamber pressure vessel as claimed in claim 2, characterized in that: The inner cylinder positioning supports are arranged in plurality, and the inner cylinder positioning supports are all arranged along the axial direction of the outer cylinder, and the distance between two adjacent inner cylinder positioning supports is 3-5m.

4. A dedicated device for installing the inner cylinder of an elongated double-chamber pressure vessel as claimed in claim 3, characterized in that: The inner cylinder positioning support includes an outer cylinder support ring and an inner cylinder support ring. The outer cylinder support ring is arranged inside the outer cylinder, and the inner cylinder support ring is sleeved outside the inner cylinder. The outer cylinder support ring and the inner cylinder support ring are welded together by a plurality of seamless steel pipes to form a "M" shaped cross structure.

5. A dedicated device for installing the inner cylinder of an elongated double-chamber pressure vessel as claimed in claim 2, characterized in that: The coaxiality adjustment device comprises a fine-tuning screw, one end of which is a polished rod, the other end of which is provided with an external thread, and the middle of which is provided with an adjustment hole for inserting a tool to rotate the fine-tuning screw; One end of the fine-tuning screw rod is rotatably connected to a blind hole arranged on the connected cushion block, and the other end is threadedly connected to a threaded hole arranged at the end of the connected support column or auxiliary support rod.

6. A dedicated device for installing the inner cylinder of an elongated double-chamber pressure vessel as claimed in claim 5, characterized in that: The angle between the auxiliary support rod and the support column is 50-75 degrees; The two auxiliary support rods are fixedly connected to the support column through connecting rods respectively; An arc-shaped pad connected to the inner cylinder is fixedly connected to a side surface of the pad away from the fine-tuning screw.

7. A dedicated device for installing the inner cylinder of an elongated double-chamber pressure vessel as claimed in claim 6, characterized in that: The inner cylinder support assembly is arranged in plurality along the axial direction of the outer cylinder, and the distance between two adjacent inner cylinder support assemblies is 5-8 times of the inner cylinder diameter.

8. A dedicated device for installing the inner cylinder of an elongated double-chamber pressure vessel as claimed in claim 1, characterized in that: The transport guide rail assembly comprises support guide rails fixedly arranged on the inner wall of the outer cylinder corresponding to the support columns and auxiliary guide rails fixedly arranged on the inner wall of the outer cylinder corresponding to the auxiliary support rods respectively; The supporting guide rail and the auxiliary guide rail are parallel to each other and are both arranged along the axial direction of the outer cylinder; A rolling device is provided on one end of the support column connected to the transport guide rail assembly, and the support column is rollingly connected to the support guide rail through the rolling device; The auxiliary support rod is rollingly connected to the auxiliary guide rail via a rolling device.

9. A dedicated device for installing the inner cylinder of an elongated double-chamber pressure vessel as claimed in claim 8, characterized in that: The rolling device comprises two ear plates arranged parallel to each other, a roller is arranged in the area between the two ear plates, and the roller is rotatably connected to the two ear plates through a pin shaft; One end of the ear plate is fixedly connected to the end of the support column or the auxiliary support rod, and the roller protrudes from the ear plate in a direction away from the support column or the auxiliary support rod and is rollingly connected to the support guide rail or the auxiliary guide rail.

10. A dedicated device for installing an inner cylinder of an elongated double-chamber pressure vessel as claimed in claim 1, characterized in that: The tail traction assembly includes a fixed support, one end of the outer tube is open, and the other end is closed, a through hole is provided on the closed end of the outer tube, and the fixed support is arranged outside the closed end of the outer tube; The fixed support is connected to a fixed pulley, a steel wire rope is wound around the fixed pulley, a fall chain is arranged at the end of the steel wire rope, and the steel wire rope and the fall chain pass through the through hole arranged at the end of the outer cylinder and extend into the inner part of the outer cylinder for connecting with the inner cylinder; The rotation axis of the fixed pulley and the central axis of the outer cylinder are located on the same horizontal plane; The distance between the fixed support and the outer cylinder is 3-5m.

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