CN-116638279-B - Method for introducing internal parts of large heat exchange equipment

Abstract

A method for guiding the internal parts of large-scale heat-exchange equipment includes such steps as horizontally arranging the casing on the base surface, supporting the internal parts on the base surface by the first and the second trolleys, axially moving the first trolley near the first end of internal part, supporting the internal part on the bottom surface of internal wall of casing, moving the second trolley near the second end of internal part, supporting the internal part on the base surface outside the second end of casing, moving the second trolley in the same direction as that of the first trolley, and applying a horizontal pull force to the first end of internal part along the guiding direction of internal part by the pull mechanism outside the first end of casing. Compared with the prior art, the application does not need to use a crane for hoisting, and reduces the risk of scraping internal parts.

Inventors

• YU XIAOBO
• LI YUPING
• ZHOU RONGHAI
• FAN LIFENG
• GUO KE
• LIU XUEFEI

Assignees

• 镇海石化建安工程股份有限公司

Dates

Publication Date

20260505

Application Date

20220418

Claims (1)

1. 1. A method of introducing an inner part of a large heat exchange device, the heat exchange device comprising a tubular housing (10) and an inner part (20), the housing (10) having a chamber therein extending axially and having a first port (11) and a second port (12) at both end faces, respectively, for introducing the inner part (20), the inner part (20) having opposite first (21) and second (22) ends in an introduction direction; the method is characterized by comprising the following steps of: 1. Placing and restraining the housing (10) horizontally on the base surface (1 a); 2. The inner piece (20) is supported on the base surface (1 a) through a first trolley (100) and a second trolley (400), the first trolley (100) is arranged at a second port (12) of the shell (10) adjacent to a first end (21) of the inner piece (20) and is axially movably supported on the bottom surface of the inner wall of the shell (10), the second trolley (400) is arranged adjacent to a second end (22) of the inner piece (20) and is movably supported on the base surface (1 a) outside a second port (12) of the shell (10), and the moving direction of the second trolley (400) is consistent with that of the first trolley (100); 3. Applying a horizontal pulling force along the direction of introduction of the inner piece (20) on the first end (21) of the inner piece (20) by means of a pulling mechanism (250) located outside the first port (11) of the housing (10), thereby pulling the inner piece (20) and the first trolley (100) to move towards the first port (11) of the housing (10) to complete the introduction of the inner piece (20); The first trolley (100) comprises a frame (110) and wheels (120), wherein a supporting piece (130) for supporting an inner piece (20) is arranged at the top of the frame (110), two wheel frames (140) which are arranged horizontally and are spaced in a first direction perpendicular to the axial direction of the shell (10) are arranged at the bottom of the frame (110), the wheels (120) are respectively and rotatably restrained at the bottoms of the corresponding wheel frames (140) so that the first trolley (100) can axially move along the shell (10), and the tops of the two wheel frames (140) can be restrained on the frame (110) in a relative rotation mode so that the two groups of wheels (120) can be mutually close to or far away from each other in the first direction; A debugging platform (300) is arranged beside the second port (12) of the shell (10), the debugging platform (300) is supported on a base surface (1 a) and comprises a base (310), a first adjusting plate (320) and a second adjusting plate (330) which are arranged side by side along the first direction and face upwards and are connected with the inner wall of the shell (10) are arranged on the top surface of the base (310), the first adjusting plate (320) is provided with a first side (321) opposite to the second adjusting plate (330), the second adjusting plate (330) is provided with a second side (331) opposite to the first side (321), the first adjusting plate (320) can be restrained on the top surface of the base (310) in an up-down rotation mode around the first side (321), and the second adjusting plate (330) can be restrained on the top surface of the base (310) in an up-down rotation mode around the second side (331), so that the inclination angles of the first adjusting plate (320) and the second adjusting plate (330) can be adjusted, and the second adjusting plate (330) can be enabled to be aligned with the corresponding part of the bottom surface (330) of the shell (10) basically flush with the first adjusting plate (320); The debugging platform (300) further comprises a first limiting piece (340) acting on the first adjusting plate (320) for positioning the first adjusting plate (320) at a required inclination angle and a second limiting piece (350) acting on the second adjusting plate (330) for positioning the second adjusting plate (330) at a required inclination angle; In the second step, the two groups of wheels (120) of the first trolley (100) are respectively supported on the first adjusting plate (320) and the second adjusting plate (330) of the debugging platform (300) before entering the shell (10), and the angles of the two wheel frames (140) are adjusted so that the rotation axes of the two groups of wheels (120) are respectively parallel to the plate surfaces of the first adjusting plate and the second adjusting plate (330), and then the first trolley (100) moves from the debugging platform (300) to the bottom surface of the inner wall of the shell (10) under the action of the tensile force.

Description

Method for introducing internal parts of large heat exchange equipment The application is based on the patent application of China, the application number of which is 202210437179.1, the application date of which is 2022, 4 and 18, and the application name of which is a method for introducing the internal parts of large-scale heat exchange equipment. Technical Field The invention belongs to the technical field of large heat exchange equipment internal part introduction, and particularly relates to a large heat exchange equipment internal part introduction method. Background The large heat exchange equipment comprises a cylindrical shell and internal parts restrained in the shell, the weight of the internal parts of the heat exchange equipment above 200 tons is more than 100 tons, when the heat exchange equipment is assembled, the prefabricated internal parts are required to be integrally guided into the shell of the equipment, and the internal parts cannot be scraped in contact with the inner wall of the shell in the guiding process, otherwise, the internal parts are easy to damage. However, the introduction is inconvenient because of the large tonnage and volume of the internal parts. The technical scheme of the present large heat exchange equipment internals is disclosed in the invention patent application No. CN201510594433.9, namely a plate heat exchanger core assembly pulley and a using method thereof (application publication No. CN 105129615A), the structure of the pulley comprises three pulleys, a flat plate and baffle plates, wherein the flat plate is assembled and welded on the three pulleys, the baffle plates are arranged at the left end and the right end of the flat plate, the using method is that the pulley is placed at the lower end of a shell, the core is lifted, the reinforcing part at one end of the core is placed on the pulley, the overhead travelling crane slowly pushes the core into a cylinder body through a shoulder pole until the core is in place, the pulley is withdrawn, and a core tail positioning plate and a positioning slide plate are assembled. The use of the above-described assembly trolley allows adjustment of the mounting position of the core. The invention further discloses a hoisting assembly tool for a large-diameter tube bundle, which is disclosed in the patent application No. CN105775991A, and a using method thereof, and structurally comprises a tube bundle hanging plate assembly, a fixed pulley assembly and a tube bundle tension assembly, wherein the tube bundle hanging plate assembly consists of an arc plate and a lifting lug, and the fixed pulley assembly is fixed on a basic platform. When the steel wire rope is used, the tube bundle tension assembly is arranged in the middle of the front end of the tube bundle, one end of the steel wire rope passes through the fixed pulley assembly and penetrates through the tube bundle to be connected with the tube bundle tension assembly, the other end of the steel wire rope is connected with the other crane, and the steel wire rope pulls the tube bundle to enter the shell at a constant speed in the horizontal direction through the fixed pulley assembly. The tool with the structure ensures that the speed is uniform and controllable when the large-diameter tube bundles are assembled and hoisted into and out of the shell, has small operation risk, has strong universality, can be suitable for assembling the tube bundles with different diameters, further greatly improves the tube bundle assembling efficiency and reduces the tube bundle assembling cost. The technical problems of the scheme are as follows: 1. the crane is required to be matched with a crane for use, is not beneficial to open-air operation or occasion without hoisting equipment, and has shaking phenomenon when lifted by the crane, so that the risk of scraping internal parts and the inner wall of the shell exists; 2. In practical working conditions, the shell of the heat exchange device has different dimensions, when the inner diameter of the shell is increased or reduced, the radian of the inner wall of the shell is also changed, and the assembling pulley disclosed in the above CN201510594433.9 application is only suitable for a heat exchanger with a certain specification, and cannot be adjusted according to the size of the shell. And if the assembling pulley in the above application can be adjusted according to the size of the shell, the assembling pulley also needs to be arranged in the shell, and the operation is inconvenient. Disclosure of Invention The technical problem to be solved by the invention is to provide a method for guiding the internal parts of the large heat exchange equipment without crane lifting so as to reduce the risk of scraping the internal parts. The technical scheme adopted for solving the technical problems is that the method for guiding the internal parts of the large heat exchange equipment comprises a cylindrical shell and the internal parts, wh