CN110802384A

CN110802384A - U-shaped tubular heat exchanger tube bundle threading tool

Info

Publication number: CN110802384A
Application number: CN201911079471.5A
Authority: CN
Inventors: 齐超; 汤雪松; 玄赛
Original assignee: Northern Huajin Formosan Union Chemical Corp
Current assignee: Northern Huajin Formosan Union Chemical Corp
Priority date: 2019-11-07
Filing date: 2019-11-07
Publication date: 2020-02-18

Abstract

The invention provides a U-shaped tubular heat exchanger tube bundle threading tool which comprises a plurality of assemblies formed by channel steel, shafts and rollers, a baffle plate, a horizontal guide rail and a rib plate, wherein the assembly comprises a plurality of horizontal guide rails and a plurality of horizontal guide rails; wherein, the left and right side walls of the channel steel are respectively provided with a shaft hole; the shaft penetrates through the ball and then is inserted into the shaft hole of the channel steel; the assembly is welded and fixed with a notch cut on the baffle plate through the channel steel; the horizontal guide rail is flatly arranged on the inner wall of the shell and is welded and fixed with the inner wall of the shell; the two horizontal guide rails are positioned through rib plates; the baffle plate is placed on the horizontal guide rail through the channel steel, and rolling friction is realized between the ball in the assembly and the horizontal guide rail. The invention adopts the roller and the horizontal guide rail device, can reduce the resistance when the tube bundle is drawn out and put in, and is suitable for the U-shaped heat exchanger with larger tube bundle weight and larger diameter; horizontal guide rails are welded on the inner surface of the shell below the rollers, so that the tube bundle can be conveniently drawn out and put in, and the radial displacement of the tube bundle can be effectively prevented.

Description

U-shaped tubular heat exchanger tube bundle threading tool

Technical Field

The invention belongs to the technical field of heat exchanger manufacturing and overhauling, and particularly relates to a U-shaped tubular heat exchanger tube bundle threading tool.

Background

The heat exchanger is a device for transferring partial heat of hot fluid to cold fluid, and is widely applied to chemical industry, petroleum industry, power industry, food industry and other industries. The U-shaped tube heat exchanger is named because the heat exchange tube is U-shaped, and has the main characteristics that: the process is longer, the flow rate is higher, the heat transfer performance is good, and the bearing capacity is strong. The U-shaped tube heat exchanger tube bundle can be drawn out of and put into the shell, and the outside of the tube is convenient to clean. The moving direction of the tube bundle when the tube bundle is drawn out and loaded is vertical to the baffle plate, and the tube bundle is mostly provided with the slat type slide ways, so that the tube bundle and the shell are in sliding friction, the resistance of the tube bundle when the tube bundle is drawn out and loaded is larger, particularly under the conditions of larger tube bundle quality and longer tube bundle, the disassembly and the assembly of the tube bundle are time-consuming and labor-consuming, and the baffle plate is very easy to damage. The invention provides a U-shaped tubular heat exchanger tube bundle threading tool in order to reduce resistance in tube bundle drawing and assembling and avoid damage to a baffle plate as much as possible.

Disclosure of Invention

Technical problem to be solved

The invention provides a U-shaped tubular heat exchanger tube bundle threading tool, which aims to solve the technical problems of difficult suction and assembly of the U-shaped tubular heat exchanger tube bundle, deformation of a baffle plate and eccentricity of the tube bundle.

(II) technical scheme

In order to solve the technical problem, the invention provides a U-shaped tubular heat exchanger tube bundle threading tool, which comprises a plurality of assemblies formed by channel steel, shafts and rollers, a baffle plate, a horizontal guide rail and a rib plate; wherein, the left and right side walls of the channel steel are respectively provided with a shaft hole; the shaft penetrates through the ball and then is inserted into the shaft hole of the channel steel; the assembled channel steel, shaft and ball assembly is welded and fixed with a notch cut on the baffle plate through the channel steel, and after welding, the axial displacement of the shaft is guaranteed to be limited by the baffle plate; the horizontal guide rail is flatly arranged on the inner wall of the shell and is welded and fixed with the inner wall of the shell; the two horizontal guide rails are positioned through the rib plates, so that the coaxiality and levelness of the horizontal guide rails and the shell are ensured; the baffle plate is placed on the horizontal guide rail through the channel steel, and rolling friction is realized between the ball in the assembly and the horizontal guide rail.

Furthermore, an inclined base plate is welded in the left side wall and the right side wall of the channel steel respectively, a shaft hole which is equal in diameter and corresponds to the shaft hole in the channel steel in position is machined in the inclined base plate, and the inclined base plate, the channel steel, the shaft and the ball form an assembly together.

Furthermore, the height of the welding leg of the channel steel and the baffle plate is equal to the thickness of the baffle plate.

(III) advantageous effects

The invention provides a U-shaped tubular heat exchanger tube bundle threading tool which comprises a plurality of assemblies formed by channel steel, shafts and rollers, a baffle plate, a horizontal guide rail and a rib plate, wherein the assemblies are arranged on the channel steel; wherein, the left and right side walls of the channel steel are respectively provided with a shaft hole; the shaft penetrates through the ball and then is inserted into the shaft hole of the channel steel; the assembled channel steel, shaft and ball assembly is welded and fixed with a notch cut on the baffle plate through the channel steel, and after welding, the axial displacement of the shaft is guaranteed to be limited by the baffle plate; the horizontal guide rail is flatly arranged on the inner wall of the shell and is welded and fixed with the inner wall of the shell; the two horizontal guide rails are positioned through the rib plates, so that the coaxiality and levelness of the horizontal guide rails and the shell are ensured; the baffle plate is placed on the horizontal guide rail through the channel steel, and rolling friction is realized between the ball in the assembly and the horizontal guide rail. The invention adopts the roller and the horizontal guide rail device, compared with the slat type slide way, the resistance when the tube bundle is drawn out and put in can be reduced because the rolling friction coefficient is much smaller than the sliding friction coefficient, and the invention is suitable for the U-shaped heat exchanger with larger tube bundle weight and larger diameter; horizontal guide rails are welded on the inner surface of the shell below the rollers, so that the tube bundle can be conveniently drawn out and put in, and the radial displacement of the tube bundle can be effectively prevented.

Drawings

FIG. 1 is a schematic structural view of a tube bundle threading tool of a U-shaped tubular heat exchanger according to an embodiment of the invention;

FIG. 2 is an enlarged partial cross-sectional view of the rollers and rails of an embodiment of the invention;

fig. 3 is a schematic view of the arrangement of the guide rails in the embodiment of the present invention.

In the drawings, 1-housing; 2-baffle plate; 3-channel steel; 4-axis; 5-a roller; 6-horizontal guide rail; 7-an inclined base plate; 8-rib plate.

Detailed Description

In order to make the objects, contents and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.

The embodiment provides a U-shaped tubular heat exchanger tube bundle threading tool, and the structure of the U-shaped tubular heat exchanger tube bundle threading tool is shown in figures 1-3. The threading tool comprises a plurality of assemblies formed by channel steel 3, shafts 4 and rollers 5, a baffle plate 2, a horizontal guide rail 6 and a rib plate 8. Wherein, an inclined base plate 7 is respectively welded on the left inner wall and the right inner wall of the channel steel 3, and shaft holes with equal diameter and corresponding positions are respectively processed on the inclined base plate 7 and the channel steel 3. The shaft 4 is inserted into the shaft hole of the channel steel 3 welded with the inclined backing plate 7 after passing through the ball 5. Wherein, certain assembly space is reserved in the shaft holes of the shaft 4, the ball 5 and the channel steel 3. The assembled channel steel 3, shaft 4, ball 5 and the inclined base plate 7 are welded and fixed through the notches cut in the channel steel 3 and the baffle plate 2, the height of the weld leg is equal to the thickness of the baffle plate 2, and the axial displacement of the shaft 4 is guaranteed to be limited by the baffle plate 2 after welding. The horizontal guide rail 6 is arranged on the inner wall of the shell 1 in a flat manner and is welded and fixed with the inner wall of the shell 1. The two horizontal guide rails 6 are positioned through the rib plates 8, and the coaxiality and the levelness of the horizontal guide rails 6 and the shell 1 are guaranteed. The balls 5 in the assembly make rolling friction with the horizontal guide rails 6.

During the use, with the position of tube bank roller assembly alignment horizontal guide 6, tube bank roller assembly penetrates the casing 1 gently, and the tube bank passes through flange bolt and 1 flange fastening of casing. The threading tool can evenly distribute the weight of the tube bundle to the channel steel 3 through the baffle plate 2, and the channel steel 3 transmits the weight to the ball 5 through the shaft 4. The contact area of the shaft 4 and the channel steel 3 is increased through the inclined base plates 7 welded on the two sides of the inner wall of the channel steel 3, so that the bearing capacity is improved. The ball 5 and the horizontal guide rail 6 are in rolling friction, and the friction force is greatly reduced compared with sliding friction. The side length of the wing plate of the channel steel 3 is long enough, and the radial displacement of the tube bundle can be limited. The number of the balls 5 is calculated by the bearing capacity of a single ball and the bearing capacity of each pair of balls, if the mass of the tube bundle is large, the logarithm of the balls 5 can also be increased, but a baffle plate for limiting the axial displacement of the shaft 4 is welded outside the channel steel 3.

The invention can solve the problems of difficult suction and installation of the tube bundle, deformation of the baffle plate and eccentricity of the tube bundle of the U-shaped tubular heat exchanger. Since the friction coefficient of the rolling friction is much smaller than the sliding friction, the tube bundle can be smoothly inserted into the housing by means of the guide rail and the roller device when the tube bundle assembly is assembled with the housing. Meanwhile, due to the action of the horizontal guide rail, the radial displacement of the tube bundle can be limited, and the eccentricity of the tube bundle is avoided. The invention can greatly improve the disassembly and assembly efficiency of the tube bundle and reduce the cost; the method is simple and convenient to operate, safe and reliable, and reduces the operation level requirements of pipe bundle assembly constructors; greatly improves the heat exchanger maintenance efficiency of the chemical plant and improves the economic income.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. The U-shaped tubular heat exchanger tube bundle threading tool is characterized by comprising a plurality of assemblies formed by channel steel, shafts and rollers, a baffle plate, a horizontal guide rail and a rib plate; wherein, the left and right side walls of the channel steel are respectively provided with a shaft hole; the shaft penetrates through the ball and then is inserted into the shaft hole of the channel steel; the assembled channel steel, shaft and ball assembly is welded and fixed with a notch cut on the baffle plate through the channel steel, and after welding, the axial displacement of the shaft is guaranteed to be limited by the baffle plate; the horizontal guide rail is flatly arranged on the inner wall of the shell and is welded and fixed with the inner wall of the shell; the two horizontal guide rails are positioned through the rib plates, so that the coaxiality and levelness of the horizontal guide rails and the shell are ensured; the baffle plate is placed on the horizontal guide rail through the channel steel, and rolling friction is realized between the ball in the assembly and the horizontal guide rail.

2. The threading tool according to claim 1, wherein an inclined base plate is welded to each of the left and right side walls of the channel steel, and a shaft hole having the same diameter as the shaft hole of the channel steel and corresponding to the inclined base plate is formed in the inclined base plate to form a combined member together with the channel steel, the shaft and the balls.

3. The threading tool of claim 1 wherein the leg height of the channel and baffle is equal to the thickness of the baffle.