CN111217273A

CN111217273A - Portable hoisting accessory

Info

Publication number: CN111217273A
Application number: CN202010136344.0A
Authority: CN
Inventors: 郑兆志; 黄军才; 陈金翔; 余振翔; 李改; 郑长波
Original assignee: Shunde Polytechnic
Current assignee: Shunde Polytechnic
Priority date: 2020-03-02
Filing date: 2020-03-02
Publication date: 2020-06-02

Abstract

The invention relates to a hoisting device, a central air-conditioning shell-and-tube heat exchanger comprises a shell, an end cover and a heat exchanger main body arranged in the shell, wherein a flange plate is arranged on the shell, a pair of hoisting holes are arranged on the flange plate, and the central air-conditioning shell-and-tube heat exchanger is characterized in that: still include hoisting accessory, hoisting accessory includes crossbeam, support and lifting hook, the horizontal pole of support sets up crossbeam load locating frame, the crossbeam both ends are passed crossbeam load locating frame and are placed on the support, the montant of support is in order detachable mode to install on the lifting hole, lifting hook hoists on the crossbeam, be equipped with on the end cover and let the lifting hook hang the nose hole of colluding. The invention has simple structure, flexible arrangement, larger bearing capacity, convenient carrying and universality.

Description

Portable hoisting accessory

Technical Field

The invention relates to the technical field of air-conditioning heat exchangers, in particular to a portable hoisting device for disassembling and hoisting an end cover of a central air-conditioning shell-and-tube heat exchanger.

Background

The water-cooled central air conditioner is widely installed in hotels, shopping malls, hospitals, office buildings and factory buildings, two key components of the refrigeration system, namely an evaporator and a condenser, are shell-and-tube heat exchangers commonly called as blisters, and are of a large cylindrical structure, a shell is formed by cast iron or rolled by thick steel plates, and end covers at two ends are also formed by casting or processing steel billets. As a device for exchanging heat between water and gas, the device is required to meet the cooling load of the whole building or a plurality of buildings, so that the size of the water bubbles is very large and heavy, and the end covers are also very heavy.

The water-cooled shell-and-tube heat exchanger is very easy to scale, and in order to improve the refrigeration efficiency and save the operation energy consumption, the shell-and-tube heat exchanger needs to be uncapped, descaled and cleaned once every quarter. The disassembly and the assembly of the heavy end cover are very troublesome, a hoist is generally used, but because the space of a machine room is limited, the support rod is difficult to place, and the disassembly and the assembly of the hoist cannot be carried out by aligning the position. Most of the time, only cumbersome solutions can be adopted: the lighter end cover is pulled and lifted by a plurality of persons, and the heavier end cover is provided with a pull explosion bolt on the ceiling, but the owner often does not allow the ceiling to be drilled. Other hoisting methods for the five-flower eight-door are difficult to align to the screw holes during installation, so that the disassembly and the installation of the end cover of the heat exchanger are time-consuming and labor-consuming, and screw threads of the screw holes are often damaged by pulling.

Disclosure of Invention

The invention aims to provide a flexible and convenient portable hoisting device which is used for hoisting the disassembly and the installation of an end cover of a shell-and-tube heat exchanger of a central air conditioner so as to overcome the defects of the prior art.

The technical scheme for solving the technical problem is as follows: the utility model provides a portable hoisting accessory uses when dismantling the end cover of central air conditioning shell and tube type heat exchanger and lift by crane with the installation, and central air conditioning shell and tube type heat exchanger includes shell, end cover, arranges the heat exchanger main part in the shell in, is equipped with the flange board on the shell, is equipped with a pair of lifting eye on the flange board, its characterized in that: still include hoisting accessory, hoisting accessory includes crossbeam, support and lifting hook, the horizontal pole of support sets up crossbeam load locating frame, the crossbeam both ends are passed crossbeam load locating frame and are placed on the support, the montant of support is in order detachable mode to install on the lifting hole, lifting hook hoists on the crossbeam, be equipped with on the end cover and let the lifting hook hang the nose hole of colluding.

The top of crossbeam shoulder pole locating frame sets up the screw, set up adjusting screw on the screw.

The vertical rod of the support is provided with a mounting hole, and the mounting hole is provided with a connecting bolt assembly.

The cross beam is formed by welding two angle irons in opposite directions, wherein the length of the right-angle side of one angle iron is greater than that of the right-angle side of the other angle iron.

The support also comprises an inclined rod, and the transverse rod, the vertical rod and the inclined rod of the support are connected in a welding mode in pairs.

The cross bar is formed by welding two angle irons oppositely to form an approximately rectangular cross section, wherein the length of a right-angle side of one angle iron is larger than that of the other angle iron.

The invention has the beneficial effects that:

the invention adopts the hoisting hoist as the hoisting equipment, has simple structure, small overall dimension, flexible arrangement and larger bearing capacity, can effectively hoist the heavy end cover, and has the advantages of flexibility and convenience like a manual hoisting mode and reliability and large bearing capacity like a mechanical hoisting mode. The vertical rod is provided with the left support and the right support in a detachable mode by utilizing lifting holes of the original equipment, and the conception is ingenious.

The device has good stress, and the hoisting cost is saved due to the simple structure, low cost and high hoisting efficiency.

The device is combined, is convenient to carry at ordinary times, is suitable for disassembling and assembling the end cover of the shell-and-tube heat exchanger of any type of unit such as a centrifugal type unit, a screw type unit and the like, and has universality.

Drawings

Fig. 1 is a schematic structural diagram of the hoisting device of the invention.

Fig. 2 is a schematic view of the stent structure of the present invention.

FIG. 3 is a cross-sectional view of a beam, support rail configuration of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. "plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, a fixed connection unless expressly specified or limited otherwise. Can also be detachably connected or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-3, the present invention provides a portable lifting device for use in the removal and installation of the end caps of a central air conditioning shell and tube heat exchanger. The pipe shell type heat exchanger for lifting the central air conditioner comprises a shell, an end cover 8 and a heat exchanger main body arranged in the shell, wherein a flange plate 7 is arranged on the shell, a pair of lifting holes 71 are formed in the flange plate, the pipe shell type heat exchanger further comprises a lifting device, the lifting device comprises a cross beam 10, a support, a lifting hoist 11 and a lifting hook 13, a cross rod of the support is provided with a cross beam load positioning frame 4, two ends of the cross beam 10 penetrate through the cross beam load positioning frame to be placed on the support, a vertical rod 2 of the support is detachably mounted on the lifting holes, the lifting hoist 11 is lifted on the cross beam 10, and a lifting nose hole 81 capable of being lifted by. As shown in fig. 1, the hoist 11 is hung in the middle of the beam 10, one end of the hoist chain 12 is connected with the hook 13, the other end is dragged by an operator, when the end cover needs to be detached, the hook 13 is hung in the lifting nostril 81, one person pulls the other end of the hoist chain, one person detaches the bolt 9 on the end cover, and then carefully and slowly detaches the end cover on the ground. After the descaling and cleaning of the water-cooling shell-and-tube heat exchanger are completed, the lifting nostrils of the end cover are hooked by the lifting hooks, the end cover is lifted to the original position by the lifting hoist 11, and then the bolt holes of the end cover are aligned with the holes of the flange plate to be fixed by bolts. After completion, the bracket can be detached from the flange plate. The invention skillfully utilizes the lifting holes 71 which are inherent on the flange plate of the shell-and-tube heat exchanger of the central air conditioner, and the bracket is arranged on the flange plate by bolts or other detachable connection modes, and is convenient to carry and flexible.

The top of crossbeam load locating frame sets up the screw, sets up adjusting screw 5 on the screw. The cross beam load positioning frames are divided into three groups, are respectively arranged on the left bracket and the right bracket, and can be selected according to the protruding heights of end covers of different machine types.

The bottom of the vertical rod 2 of the support is provided with a mounting hole, a connecting bolt assembly 6 is arranged on the mounting hole, and the support can be fixedly mounted on the flange plate 7 through the connecting bolt assembly 6.

The support still includes the down tube, and two liang of welded connection of horizontal pole, montant, the down tube of support, in order easily to draw materials, economical and practical, horizontal pole, montant, down tube and crossbeam all select the material from the angle bar, weld after cutting according to length and take shape.

The cross beam is formed by welding two angle irons oppositely to form an approximately rectangular cross section, wherein the length of the right-angle side of one angle iron is larger than that of the right-angle side of the other angle iron. The cross section is as shown in fig. 3, the wide angle iron 21 is welded with the narrow angle iron 22, and the right-angle side of the narrow angle iron 22 is welded with the wide angle iron to form an angle welding seam, which has the advantages of easier welding and enough strength and bearing capacity.

The cross rod 1 and the vertical rod 2 are also approximately rectangular cross sections formed by oppositely welding two angle irons, wherein the length of the right-angle side of one angle iron is greater than that of the other angle iron. The cross-section is shown in FIG. 3.

During support welding, the right-angle joint of the cross rod 1 and the vertical rod 2 is cut into 45-degree welding splices, wide angle irons adopted by the cross rod 1 and the vertical rod 2 are the same in specification and different in length, narrow angle irons are the same in specification and different in length, the inclined rod 3 is formed by selecting angle irons with the same specification as the narrow angle irons 22 and cutting, and then the two ends of the inclined rod are respectively welded with the narrow angle irons of the cross rod 1 and the vertical rod 2 to form angle welding seams.

The diagonal rod 3 can be formed by cutting an angle iron, and can also be formed by welding two large and small angle irons according to the structures of the cross rod 1 and the vertical rod 2.

L-shaped buckles 23 are welded on the outer sides of the vertical rods 2, openings of the buckles 23 on the left support and the right support are opposite or the same downward, the distance between the buckles 23 and mounting holes of the connecting bolt assemblies 6 is slightly larger than the distance between the lifting holes 71 and the upper edge of the flange plate, the buckles 23 are L-shaped, one ends of the buckles are welded on the vertical rods, the other ends of the buckles are suspended, screw holes are formed in the suspended buckling plates, and adjusting screws are arranged on the screw holes. The buckles 23 are used for strengthening, the support is arranged behind the flange plate, the buckles 23 protrude above the flange plate, a plate is inserted between the buckles 23 with opposite openings and then fixed by adjusting screws, and the lower edge of the plate extends into the back of the flange plate, so that the support can be more firmly fixed on the flange plate. The reinforcing frame is additionally arranged on the vertical rod, the left support and the right support are fixed behind the lifting hole, the fastening rod can be inserted into the rear of the flange, and the stability of the whole lifting device is guaranteed.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents, and all changes that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims

1. The utility model provides a portable hoisting accessory uses when dismantling the end cover of central air conditioning shell and tube type heat exchanger and lift by crane with the installation, and central air conditioning shell and tube type heat exchanger includes shell, end cover, arranges the heat exchanger main part in the shell in, is equipped with the flange board on the shell, is equipped with a pair of lifting eye on the flange board, its characterized in that: still include hoisting accessory, hoisting accessory includes crossbeam, support and lifting hook, the horizontal pole of support sets up crossbeam load locating frame, the crossbeam both ends are passed crossbeam load locating frame and are placed on the support, the montant of support is in order detachable mode to install on the lifting hole, lifting hook hoists on the crossbeam, be equipped with on the end cover and let the lifting hook hang the nose hole of colluding.

2. The portable lifting device of claim 1, wherein: the top of crossbeam shoulder pole locating frame sets up the screw, set up adjusting screw on the screw.

3. The portable lifting device of claim 2, wherein: the vertical rod of the support is provided with a mounting hole, and the mounting hole is provided with a connecting bolt assembly.

4. The portable lifting apparatus of claim 1, 2 or 3, wherein: the cross beam is formed by welding two angle irons in opposite directions, wherein the length of the right-angle side of one angle iron is greater than that of the right-angle side of the other angle iron.

5. The portable lifting device of claim 4, wherein: the support still includes the down tube, two liang of welded connection of horizontal pole, montant, the down tube of support, the montant comprises two angle bar right angles welding in opposite directions, and the right angle limit length of one of them angle bar is greater than the right angle limit length of another angle bar.

6. The portable lifting device of claim 5, wherein: the cross bar is formed by welding two angle irons in opposite directions, wherein the length of the right-angle side of one angle iron is greater than that of the right-angle side of the other angle iron.