阅读说明：本技术 换热管束的装配工艺 (Assembly process of heat exchange tube bundle ) 是由 李进 于 2019-10-31 设计创作，主要内容包括：本发明涉及一种换热管束的装配工艺,它包括如下步骤：(1)装第一层换热管；(2)装第二层换热管；(3)重复步骤(2),依次安装其余各层换热管；(4)换热管全部安装完毕后,将上管板、下管板向中间移动至和内筒端部接触,固定连接上管板、下管板与内筒；完成换热管束的装配。由里向外逐层安装,适应于由里向外按同心圆排列的管束装配,且配合设计了一种装配工装,使得管束装配更方便。(The invention relates to an assembly process of a heat exchange tube bundle, which comprises the following steps: (1) installing a first layer of heat exchange tubes; (2) installing a second layer of heat exchange tubes; (3) repeating the step (2), and sequentially installing the other layers of heat exchange tubes; (4) after the heat exchange tubes are completely installed, the upper tube plate and the lower tube plate move towards the middle to be contacted with the end part of the inner cylinder, and the upper tube plate, the lower tube plate and the inner cylinder are fixedly connected; and finishing the assembly of the heat exchange tube bundle. From inside to outside successive layer installation, be adapted to from inside to outside according to the assembly of the tube bank of concentric circles range, and the cooperation has designed an assembly fixture for the tube bank assembly is more convenient.)

1. A heat exchange tube bundle assembling process is characterized by comprising the following steps:

(1) with a first layer of heat-exchange tubes

All finger rings required by each heat exchange tube are sleeved, and the finger rings are slid to corresponding positions; if the first layer is provided with n1 heat exchange tubes, the outer circle of the inner cylinder is divided into n1 equal parts, and n1 buses are drawn on the outer side of the inner cylinder; selecting one of the buses, tightly attaching a first heat exchange tube to the outer wall of the inner cylinder, fixing the ring sleeve on the outer wall of the inner cylinder, and overlapping the ring sleeve with the selected bus; the rest heat exchange tubes are arranged in the same way; after the first layer of heat exchange tubes are completely assembled, installing tube plates and lower tube plates; extending the head parts of all the heat exchange tubes of the first layer into tube holes corresponding to the upper tube plate and the lower tube plate respectively; installing a first layer of distance rings at the positions of the first layer of finger ring sleeves, and fixing each finger ring sleeve of the first layer with the first layer of distance rings;

(2) second layer heat exchange tube

If the number of the second layer of heat exchange tubes is n2, dividing the first layer of distance ring into n2 equal parts, and marking dividing lines on the distance ring; fixing a distance block at the position of each dividing line; all the finger rings required by the second layer of heat exchange tubes are arranged, and the finger ring sleeves are fixedly connected with the corresponding positioning blocks; after the second layer of finger ring sleeves and the positioning blocks are completely fixed, the upper tube plate and the lower tube plate are inwardly closed, and the head parts of all the heat exchange tubes of the second layer are extended into the tube holes corresponding to the upper tube plate and the lower tube plate respectively; mounting a second layer of distance rings at the positions of the second layer of finger ring sleeves, and fixing each finger ring sleeve of the second layer with the second layer of distance rings;

(3) repeating the step (2), and sequentially installing the other layers of heat exchange tubes;

(4) after the heat exchange tubes are completely installed, the upper tube plate and the lower tube plate move towards the middle to be contacted with the end part of the inner cylinder, and the upper tube plate, the lower tube plate and the inner cylinder are fixedly connected; and finishing the assembly of the heat exchange tube bundle.

2. The heat exchange tube bundle assembly process according to claim 1, wherein during the assembly process, an assembly tool is used to assist the assembly; the assembly tool comprises a hollow shaft, wherein before the step (1), an inner cylinder is sleeved on the hollow shaft, the inner cylinder and the hollow shaft are connected in an expansion manner through an expansion mechanism, an upper tube plate and a lower tube plate are sleeved on the hollow shaft from two ends of the hollow shaft and are in movable fit with the hollow shaft, the hollow shaft is arranged on a roller frame, and after the step (4), the inner cylinder and the hollow shaft are loosened through the expansion mechanism, and the hollow shaft is drawn out; the hollow shaft is arranged on the roller frame, and the best position for operation can be obtained only by properly rotating the hollow shaft during the installation operation.

3. The heat exchange tube bundle assembling process according to claim 2, wherein the assembling tool further comprises a plurality of guide heads, and in the steps (1), (2) and (3), the guide heads are inserted into the ends of the heat exchange tubes; the extension lengths of the two ends of the heat exchange tube are gradually reduced from inside to outside in a step shape.

4. The assembly process of claim 2, wherein the expansion mechanism comprises a positioning guide sleeve, an expansion cone and a plurality of expansion sliders, the positioning guide sleeve is arranged in the hollow shaft, concentric with and fixedly connected to the hollow shaft, the tail end of the expansion cone extends into the positioning guide sleeve, is movably matched with the positioning guide sleeve and is driven by the adjusting structure to move relative to the positioning guide sleeve, a plurality of holes are arranged in a circle of the hollow shaft, the expansion sliders are correspondingly arranged in the holes one by one and are movably matched with the hollow shaft, all the expansion sliders are distributed around the expansion cone, are in contact with the conical surface of the expansion cone, move along with the expansion cone, push the expansion sliders to extend out of the hollow shaft and push against the inner barrel, and the expansion connection between the inner barrel and the hollow shaft is performed, or the expansion sliders are released, so that the inner barrel and the hollow shaft are released.

5. The heat exchange tube bundle assembling process according to claim 4, wherein the adjusting structure comprises an end cover and an expansion screw, the end cover is covered at one end of the hollow shaft through an end cover fastener, the expansion screw penetrates through the end cover and extends into the hollow shaft to be connected with the expansion cone in a driving mode, the expansion screw is in threaded connection with the end cover, and the expansion screw is rotated to drive the expansion cone to move.

6. The heat exchange tube bundle assembly process according to claim 4, wherein the expansion screw is concentric with the hollow shaft and fixedly connected with the expansion cone.

7. A heat exchange tube bundle assembling process according to claim 2, wherein there are two said expansion mechanisms, respectively disposed at both ends of the hollow shaft.

Technical Field

The invention relates to a heat exchanger, in particular to an assembly process of a heat exchange tube bundle.

Background

In the radial reactor, since the space outside the heat exchange tubes needs to be filled with the catalyst, it is impossible to maintain the heat exchange tube pitch by the conventional baffle plate or support plate structure, because the catalyst cannot be loaded and unloaded. In addition, when the radial reactor is used for assembling the tube bundle, the process of building a frame and then penetrating the tube is not adopted, and the heat exchange tubes are assembled layer by layer from inside to outside.

Disclosure of Invention

The invention provides an assembly process of a heat exchange tube bundle.

The technical scheme of the invention is as follows:

a heat exchange tube bundle comprises an inner tube, an upper tube plate and a lower tube plate, wherein the upper tube plate and the lower tube plate are arranged at the upper end and the lower end of the inner tube, a plurality of fixing parts are arranged on the periphery of the inner tube from top to bottom, a plurality of heat exchange tubes are fixedly connected with the fixing parts, the plurality of heat exchange tubes are divided into a plurality of layers from inside to outside, each layer of heat exchange tubes are uniformly arranged around the inner tube in a circle, a plurality of tube holes are uniformly distributed in the upper tube plate and the lower tube plate, and two ends of each heat exchange tube correspond; the fixing piece comprises a plurality of finger ring sleeves, the finger ring sleeves are sleeved on the heat exchange tube in a one-to-one correspondence mode, the innermost finger ring sleeve is fixedly connected with the inner tube, and the outer finger ring sleeve is fixedly connected with the inner finger ring sleeve through a distance ring and a plurality of positioning blocks.

Furthermore, the extension lengths of the two ends of the heat exchange tube are gradually decreased from inside to outside in a step shape

The assembly process of the heat exchange tube bundle is characterized in that the innermost heat exchange tube is a first layer of heat exchange tube, and the assembly process comprises the following steps:

(1) with a first layer of heat-exchange tubes

All finger rings required by each heat exchange tube are sleeved, and the finger rings are slid to corresponding positions; if the first layer is provided with n1 heat exchange tubes, the outer circle of the inner cylinder is divided into n1 equal parts, and n1 buses are drawn on the outer side of the inner cylinder; selecting one of the buses, tightly attaching a first heat exchange tube to the outer wall of the inner cylinder, fixing the ring sleeve on the outer wall of the inner cylinder, and overlapping the ring sleeve with the selected bus; the rest heat exchange tubes are arranged in the same way; after the first layer of heat exchange tubes are completely assembled, installing tube plates and lower tube plates; extending the head parts of all the heat exchange tubes of the first layer into tube holes corresponding to the upper tube plate and the lower tube plate respectively; and then, installing a first layer of distance rings at the positions of the first layer of finger ring sleeves, and fixing each finger ring sleeve of the first layer and the first layer of distance rings in a spot welding manner.

(2) Second layer heat exchange tube

If the number of the second layer of heat exchange tubes is n2, dividing the first layer of distance ring into n2 equal parts, and marking dividing lines on the distance ring; fixing a distance block at the position of each dividing line; all the finger rings required by the second layer of heat exchange tubes are arranged, and the finger ring sleeves are fixedly connected with the corresponding positioning blocks; after the second layer of finger ring sleeves and the positioning blocks are completely fixed, the upper tube plate and the lower tube plate are inwardly closed, and the head parts of all the heat exchange tubes of the second layer are extended into the tube holes corresponding to the upper tube plate and the lower tube plate respectively; and mounting a second layer of distance rings at the positions of the second layer of finger ring sleeves, and fixing each finger ring sleeve of the second layer and the second layer of distance rings in a spot welding manner.

(3) And (3) repeating the step (2), and sequentially installing the other layers of heat exchange tubes.

(4) After the heat exchange tubes are completely installed, the upper tube plate and the lower tube plate move towards the middle to be contacted with the end part of the inner cylinder, and the upper tube plate, the lower tube plate and the inner cylinder are fixedly connected; and finishing the assembly of the heat exchange tube bundle.

The tube bundle is installed layer by layer from inside to outside, and the method is just suitable for the novel tube bundle which is arranged from inside to outside according to concentric circles.

Furthermore, in the assembling process, an assembling tool is used for assisting assembling, so that the pipe bundle is more convenient to assemble; the assembly tool comprises a hollow shaft, wherein before the step (1), an inner cylinder is sleeved on the hollow shaft, the inner cylinder and the hollow shaft are connected in an expansion manner through an expansion mechanism, an upper tube plate and a lower tube plate are sleeved on the hollow shaft from two ends of the hollow shaft and are in movable fit with the hollow shaft, the hollow shaft is arranged on a roller frame, and after the step (4), the inner cylinder and the hollow shaft are loosened through the expansion mechanism, and the hollow shaft is drawn out; the hollow shaft is arranged on the roller frame, and the best position for operation can be obtained only by properly rotating the hollow shaft during the installation operation.

Further, the assembly tool also comprises a plurality of guide heads, and in the steps (1), (2) and (3), the guide heads are inserted into the ends of the heat exchange tubes; the extension lengths of the two ends of the heat exchange tube are designed in a step-shaped decreasing manner from inside to outside, so that the tube head of the heat exchange tube can smoothly enter the tube holes of the upper tube plate and the lower tube plate; otherwise, it would be difficult or even impossible to simultaneously introduce several thousand heat exchange tubes into the tube holes.

Furthermore, the expansion mechanism comprises a positioning guide sleeve, an expansion cone and a plurality of expansion sliding blocks, the positioning guide sleeve is arranged in the hollow shaft and is concentric with and fixedly connected with the hollow shaft, the tail end of the expansion cone extends into the positioning guide sleeve and is in movable fit with the positioning guide sleeve, the tail end of the expansion cone is driven by the adjusting structure to move relative to the positioning guide sleeve, a plurality of holes are formed in a circle on the hollow shaft, the expansion sliding blocks are arranged in the holes in a one-to-one correspondence mode and are in movable fit with the hollow shaft, all the expansion sliding blocks are distributed around the expansion cone and are in contact with the conical surface of the expansion cone to move along with the expansion cone, the expansion sliding blocks are jacked to extend out of the hollow shaft and are jacked on the inner cylinder, the inner cylinder and the hollow shaft are connected in an expansion mode, or the.

Furthermore, the adjusting structure comprises an end cover and an expansion screw rod, the end cover is covered at one end of the hollow shaft through an end cover fastener, the expansion screw rod penetrates through the end cover and extends into the hollow shaft to be connected with an expansion cone in a driving mode, the expansion screw rod is in threaded connection with the end cover, the expansion screw rod rotates, and the expansion cone is driven to move.

Furthermore, the expansion screw rod is concentric with the hollow shaft and is fixedly connected with the expansion cone.

Furthermore, the two expansion mechanisms are respectively arranged at two ends of the hollow shaft.

The pipe bundle assembling fixture has the advantages of being reasonable in design, simple in structure, capable of being installed layer by layer from inside to outside, suitable for assembling pipe bundles arranged according to concentric circles from inside to outside, and capable of enabling the pipe bundles to be assembled more conveniently due to the fact that the assembling fixture is designed in a matched mode.

Drawings

FIG. 1 is a schematic view of a heat exchange tube bundle in assembled connection with an assembler.

Fig. 2 is a schematic cross-sectional view of fig. 1A-a.

Fig. 3 is a partially enlarged schematic view of fig. 1.

Fig. 4 is a schematic view of a heat exchange tube assembly.

Fig. 5 is a schematic structural view of the assembly tool.

Fig. 6 is a schematic view of the expansion structure.

In the figure, an upper tube plate 2 of an inner cylinder 1, a lower tube plate 3 of a tube plate 3, a heat exchange tube 5, a distance ring 4-1, a positioning ring 4-2, a positioning block 4-3, an assembly tool 6-1, an upper expansion mechanism 6-2 guide head 6-3 positioning guide sleeve 6-2-1 expansion cone 6-2-2 expansion slide block 6-2-3 end cover 6-2-4-1 expansion screw 6-2-4-2 end cover fastener 6-2-4-3.

Detailed Description

As shown in fig. 1-6, a heat exchange tube bundle comprises an inner tube 1, and an upper tube plate 2 and a lower tube plate 3 which are arranged at the upper end and the lower end of the inner tube 1, wherein the periphery of the inner tube 1 is provided with a plurality of fixing members 4 from top to bottom, and is fixedly connected with a plurality of heat exchange tubes 5 through the fixing members 4, the plurality of heat exchange tubes 5 are divided into a plurality of layers from inside to outside, each layer of heat exchange tubes 5 are uniformly arranged around the inner tube for a circle, a plurality of tube holes are uniformly distributed on the upper tube plate 2 and the lower tube plate 3, and two ends of each heat exchange tube 5 are respectively in one-to-one; the fixing piece 4 comprises a plurality of finger ring sleeves 4-1, the finger ring sleeves 4-1 are sleeved on the heat exchange tube 5 in a one-to-one correspondence mode, the finger ring sleeve 4-1 on the innermost layer is fixedly connected with the inner barrel 1, and the finger ring sleeve 4-1 on the outer layer is fixedly connected with the finger ring sleeve 4-1 on the inner layer through a distance ring 4-2 and a plurality of positioning blocks 4-3; the extension lengths of the two ends of the heat exchange tube 5 are gradually reduced from inside to outside in a step shape; the middle part of the heat exchange tube 5 is bent and is matched with the shape of the inner barrel 1.

In the assembling process of the heat exchange tube bundle, the innermost heat exchange tube is the first layer of heat exchange tube, and the assembling process comprises the following steps:

(1) with a first layer of heat-exchange tubes

All finger rings required by each heat exchange tube are sleeved, and the finger rings are slid to corresponding positions; if the first layer is provided with n1 heat exchange tubes, the outer circle of the inner cylinder is divided into n1 equal parts, and n1 buses are drawn on the outer side of the inner cylinder; selecting one of the buses, tightly attaching a first heat exchange tube to the outer wall of the inner cylinder to ensure that the bending direction of the heat exchange tube is matched with the shape of the inner cylinder, and fixing the ring sleeve on the outer wall of the inner cylinder in a spot welding manner and overlapping the selected bus; the rest heat exchange tubes are arranged in the same way; after the first layer of heat exchange tubes are completely assembled, installing tube plates and lower tube plates; extending the head parts of all the heat exchange tubes of the first layer into tube holes corresponding to the upper tube plate and the lower tube plate respectively; and mounting a first layer of distance rings at the positions of the first layer of finger ring sleeves, and fixing each finger ring sleeve of the first layer and the first layer of distance rings in a spot welding manner.

(2) Second layer heat exchange tube

If the number of the second layer of heat exchange tubes is n2, dividing the first layer of distance ring into n2 equal parts, and marking dividing lines on the distance ring; fixing a distance block at the position of each index line by spot welding; all the finger rings required by the second layer of heat exchange tubes are arranged, and the finger ring sleeves and the corresponding positioning blocks are fixed in a spot welding manner; after the second layer of finger ring sleeves and the positioning blocks are completely fixed, the upper tube plate and the lower tube plate are inwardly closed, and the head parts of all the heat exchange tubes of the second layer are extended into the tube holes corresponding to the upper tube plate and the lower tube plate respectively; and mounting a second layer of distance rings at the positions of the second layer of finger ring sleeves, and fixing each finger ring sleeve of the second layer and the second layer of distance rings in a spot welding manner.

(3) And (3) repeating the step (2), and sequentially installing the other layers of heat exchange tubes.

(4) After the heat exchange tubes are completely installed, the upper tube plate and the lower tube plate move towards the middle to be contacted with the end part of the inner cylinder, and the upper tube plate, the lower tube plate and the inner cylinder are fixed through spot welding; and finishing the assembly of the heat exchange tube bundle.

In the assembling process, the assembling tool 6 is used for assisting in assembling, so that the pipe bundle is more convenient to assemble; the assembly tool 6 comprises a hollow shaft 6-1, before the step (1), the inner cylinder 1 is sleeved on the hollow shaft 6-1, the inner cylinder 1 and the hollow shaft 6-1 are connected in an expansion mode through an expansion mechanism 6-2, the upper tube plate 2 and the lower tube plate 3 are sleeved on the hollow shaft 6-1 from two ends of the hollow shaft 6-1 and are in movable fit with the hollow shaft 6-1, the hollow shaft 6-1 is arranged on a roller frame, after the step (4), the inner cylinder 1 and the hollow shaft 6-1 are loosened through the expansion mechanism 6-2, and the hollow shaft 6-1 is drawn out; the assembly tool 6 further comprises a plurality of guide heads 6-3, and in the steps (1), (2) and (3), the guide heads 6-1 are inserted into the end of the heat exchange tube 5; the two expansion mechanisms 6-2 are respectively arranged at two ends of the hollow shaft 6-1; the expansion mechanism 6-2 comprises a positioning guide sleeve 6-2-1, an expansion cone 6-2-2 and a plurality of expansion sliding blocks 6-2-3, the positioning guide sleeve 6-2-1 is arranged in the hollow shaft 6-1, is concentric with and fixedly connected with the hollow shaft 6-1, the tail end of the expansion cone 6-2-2 extends into the positioning guide sleeve 6-2-1, is in movable fit with the positioning guide sleeve 6-2-1 and is driven by an adjusting structure to move relative to the positioning guide sleeve 6-2-1, a plurality of holes are arranged on the hollow shaft 6-1 in a circle, the expansion sliding blocks 6-2-3 are correspondingly arranged in the holes one by one and are in movable fit with the hollow shaft 6-1, and all the expansion sliding blocks 6-2-3 are distributed on the expansion cone 6-2-2 for a circle, contacting with the conical surface of the expansion cone 6-2-2, moving along with the expansion cone 6-2-2, pushing the expansion slide block 6-2-3 to extend out of the hollow shaft 6-1 and push against the inner cylinder 1, expanding and connecting the inner cylinder 1 and the hollow shaft 6-1, or loosening the expansion slide block 6-2-2 and loosening the inner cylinder 1 and the hollow shaft 6-1; the adjusting structure comprises an end cover 6-2-4-1 and an expansion screw 6-2-4-2, the end cover 6-2-4-1 is covered at one end of the hollow shaft 6-1 through an end cover fastener 6-2-4-3, the expansion screw 6-2-4-2 penetrates through the end cover 6-2-4-1 to extend into the hollow shaft 6-1 to be connected with an expansion cone 6-2-2 in a driving mode, the expansion screw 6-2-4-2 is in threaded connection with the end cover 6-2-4-1, the expansion screw 6-2-4-2 is rotated, and the expansion cone 6-2-2 is driven to move; the expansion screw 6-2-4-2 is concentric with the hollow shaft 6-1 and is fixedly connected with the expansion cone 6-2-2.

Because of the limited character expression, there exist practically unlimited specific structures, and it will be apparent to those skilled in the art that a number of improvements, decorations, or changes may be made without departing from the principles of the present invention, or the above technical features may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.