Inner pipe hoisting device of heat exchanger

Abstract

The utility model discloses an inner pipe hoisting device of a heat exchanger. The inner pipe hoisting device comprises an end cover connecting lifting lug assembly connected with an end cover flange through a screw rod, and supporting disc lifting lug assemblies which are arranged on the two sides of an annular supporting disc in a one-to-one correspondence mode and connected with an upper preformed hole and a lower preformed hole. The end cover connecting lifting lug assembly comprises a lifting lug connecting flange connected to the end cover flange through a screw and an end cover connecting lifting lug arranged on the lifting lug connecting flange. The supporting disc lifting lug assembly comprises a first clamping plate assembly and a second clamping plate assembly which penetrate through the upper preformed hole and the lower preformed hole and are used for clamping the annular supporting disc; the first clamping plate assembly and the second clamping plate assembly are connected in a clamped mode. By means of the scheme, the hoisting device has the advantages of being simple in structure, reliable in hoisting and the like, and has high practical value and popularization value in the technical field of heat exchanger production.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger manufacturing technology, and in particular to an inner tube hoisting device for a heat exchanger. Background Technology

[0002] A heat exchanger is a device used to transfer heat between fluids at different temperatures, and it is widely used in industry and daily life. The heat exchanger in this technology is mainly a shell-and-tube heat exchanger, which consists of an outer shell and inner tubes. For example... Figure 1 and Figure 2 As shown, an end cap flange 100 is installed on the inner tube, and several heat exchange tubes 300 connected to the end cap flange 100 are installed inside the outer shell. Each heat exchange tube 300 is U-shaped. Furthermore, the inner tube is supported by an annular support plate 200 and side support bars 400. Currently, the heat exchange tubes 300 in existing technologies are mostly made of copper. When installing the end cap flange 100, a horizontal installation and welding are used. After the inner tube is assembled, it is then hoisted into the outer shell and fixed to it using the end cap flange 100. Because the inner tube is assembled and welded horizontally and needs to be inserted into the outer shell, i.e., the annular support plate 200 is in contact with the inner wall of the outer shell, the inner tube is currently installed in the outer shell mainly using two methods: horizontal and vertical. Horizontal installation is more difficult; as long as the end cap flange 100 provides support, the heat exchange tubes 300 cannot be hoisted to bear weight, making them prone to breakage, deformation, and other problems. Furthermore, horizontal installation requires specialized installation equipment (to prevent the annular support plate 200 and side support bars 400 from scraping against the inner wall of the outer shell, and to ensure the overall stress balance of the inner tube) to ensure that the inner tube is inserted into the outer shell in a horizontal direction. Therefore, current technologies mostly use a vertical installation method for inner tube installation, that is, the outer shell is installed vertically, the inner tube is hoisted into the outer shell in a vertical direction, and then connected by bolts using the end cover flange 100. However, the hoisting of the inner tube from a horizontal layout to a vertical layout requires hoisting fixtures to prevent the rear end of the heat exchange tube 300 from being squeezed and deformed by the ground.

[0003] Therefore, there is an urgent need to propose a simple and reliable internal tube hoisting device for heat exchangers. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model is to provide an inner tube hoisting device for a heat exchanger. The technical solution adopted by this utility model is as follows:

[0005] A device for hoisting the inner tube of a heat exchanger is disclosed. The inner tube includes an end cap flange, an annular support plate, a heat exchange tube, and side support bars. The heat exchange tube is U-shaped. Several annular support plates are provided and fitted onto the heat exchange tube. The side support bars are arranged in annular arrays connected to the annular support plates. The annular support plate has one row of upper pre-drilled holes and one row of lower pre-drilled holes. The device for hoisting the inner tube of the heat exchanger includes an end cap connecting lug assembly connected to the end cap flange by screws, and support plate lifting lug assemblies correspondingly arranged on both sides of the annular support plate and connected to the upper and lower pre-drilled holes.

[0006] The end cap connecting lug assembly includes a lug connecting flange connected to the end cap flange by a screw, and an end cap connecting lug provided on the lug connecting flange;

[0007] The support plate lifting lug assembly includes a first clamping plate assembly and a second clamping plate assembly that are configured through the upper and lower pre-drilled holes and clamp the annular support plate; the first clamping plate assembly and the second clamping plate assembly are locked together.

[0008] Furthermore, the second clamping plate assembly includes a second U-shaped clamping plate, several connecting posts disposed on the second U-shaped clamping plate, connecting grooves opened at the front ends of the connecting posts, and a second lifting hole disposed at the rear end of the second U-shaped clamping plate; the connecting posts are configured to pass through the upper and lower reserved holes.

[0009] Furthermore, the first clamping plate assembly includes a first U-shaped clamping plate identical to the second U-shaped clamping plate, a first lifting hole formed on the first U-shaped clamping plate and coinciding with the second lifting hole, and a plurality of gourd holes formed on the first U-shaped clamping plate and corresponding one-to-one with the connecting column; the gourd holes include a first through hole and a second through hole that are interconnected; the diameter of the first through hole is larger than the diameter of the second through hole; the first through hole is located on the side closer to the second lifting hole.

[0010] Furthermore, a first rear support platform is provided at the rear end of the first U-shaped clamp; the first lifting hole is provided through the first rear support platform; a second rear support platform is provided at the rear end of the second U-shaped clamp; the second lifting hole is provided through the second rear support platform.

[0011] Furthermore, the sum of the thicknesses of the first rear support platform and the second rear support platform is equal to the thickness of the annular support disc.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] (1) This utility model sets up an end cap connecting lug assembly to facilitate connection with the end cap flange. It provides lifting support during hoisting and vertical placement of the inner tube. Its structure is simple and the connection is reliable.

[0014] (2) This utility model sets up several pairs of support plate lifting lugs and places them on both sides of the annular support plate to support the heat exchange tube, the annular support plate, etc. during the inner tube hoisting and turning process, so as to ensure that the rear end support of the heat exchange tube is reliable.

[0015] (3) This utility model ensures efficient and reliable installation by setting up a first clamping plate assembly and a second clamping plate assembly that are connected by a locking mechanism and connecting them with the upper and lower reserved holes.

[0016] In summary, this utility model has the advantages of simple structure and reliable hoisting, and has high practical and promotional value in the field of heat exchanger production technology. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope of protection. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the inner tube in this utility model.

[0019] Figure 2 This is a partially enlarged schematic diagram of the inner tube in this utility model.

[0020] Figure 3 This is a schematic diagram of the installation of this utility model.

[0021] Figure 4 This is a schematic diagram of the structure of the end cap connecting lug assembly of this utility model.

[0022] Figure 5 This is a schematic diagram of the support plate lifting lug assembly in this utility model.

[0023] Figure 6 This is a schematic diagram of the structure of the second clamping plate assembly in this utility model.

[0024] Figure 7 This is a schematic diagram of the structure of the first clamping plate assembly in this utility model.

[0025] In the above figures, the component names corresponding to the reference numerals are as follows:

[0026] 100. End cap flange; 200. Annular support plate; 300. Heat exchange tube; 400. Side support strip; 201. Upper reserved hole; 202. Lower reserved hole; 1. End cap connecting lug assembly; 2. Support plate lug assembly; 11. Lug connecting flange; 12. End cap connecting lug; 21. First clamping plate assembly; 22. Second clamping plate assembly; 211. First U-shaped clamping plate; 212. First rear support platform; 213. First lifting hole; 214. Hoist hole; 221. Second U-shaped clamping plate; 222. Second rear support platform; 223. Second lifting hole; 224. Connecting column; 225. Connecting groove. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of this utility model include, but are not limited to, the following embodiments. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0028] In this embodiment, the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0029] The terms "first" and "second," etc., used in the specification and claims of this embodiment are used to distinguish different objects, not to describe a specific order of objects. For example, "first target object" and "second target object," etc., are used to distinguish different target objects, not to describe a specific order of target objects.

[0030] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0031] In the description of the embodiments in this application, unless otherwise stated, "multiple" means two or more. For example, multiple processing units means two or more processing units; multiple systems means two or more systems.

[0032] like Figures 1 to 7This embodiment provides an inner tube hoisting device for a heat exchanger, used for hoisting the inner tube. The inner tube includes an end cap flange 100, an annular support plate 200, a heat exchange tube 300, and side support bars 400. The heat exchange tube 300 is U-shaped. Several annular support plates 200 are provided and fitted onto the heat exchange tube 300. The side support bars 400 are connected to the annular support plates 200 in a circular array. Each annular support plate 200 has a row of upper pre-drilled holes 201 and a row of lower pre-drilled holes 202. Because the upper and lower pre-drilled holes 201 are located between the heat exchange tubes 300, and the gap between adjacent heat exchange tubes 300 is small, the space for connecting with screws and nuts is limited, making installation inconvenient.

[0033] The heat exchanger's inner tube hoisting device in this embodiment includes an end cap connecting lug assembly 1 that is screwed to the end cap flange 100, and a support plate lug assembly 2 that is correspondingly arranged on both sides of the annular support plate 200 and connected to the upper reserved hole 201 and the lower reserved hole 202. In this embodiment, a pair of support plate lug assemblies 2 can be used, and they are connected to... Figure 3 The rearmost annular support plate 200 is connected; or the support plate lifting lug assembly 2 uses two pairs, depending on the total weight of the inner tube.

[0034] In this embodiment, the end cap connecting lug assembly 1 includes a lug connecting flange 11 connected to the end cap flange 100 by a screw, and an end cap connecting lug 12 disposed on the lug connecting flange 11. During the entire process of turning the inner tube from horizontal to vertical installation and hoisting it into the outer shell, the end cap connecting lug assembly 1 is used for hoisting support.

[0035] In this embodiment, the support plate lifting lug assembly 2 is used to support the inner tube during tilting and hoisting, preventing the annular support plate 200, heat exchange tube 300, and side support strip 400 from contacting the ground, thus ensuring their integrity. The support plate lifting lug assembly 2 includes a first clamping plate assembly 21 and a second clamping plate assembly 22, which pass through the upper and lower pre-drilled holes 201 and clamp the annular support plate 200. Here, the first clamping plate assembly 21 and the second clamping plate assembly 22 are locked together.

[0036] Specifically, the second clamping plate assembly 22 includes a second U-shaped clamping plate 221, several connecting posts 224 disposed on the second U-shaped clamping plate 221, connecting grooves 225 opened at the front end of the connecting posts 224, a second rear support platform 222 disposed at the rear end of the second U-shaped clamping plate 221, and a second lifting hole 223 disposed at the rear end of the second U-shaped clamping plate 221. The connecting posts 224 are provided through the upper reserved hole 201 and the lower reserved hole 202. Additionally, the first clamping plate assembly 21 includes a first U-shaped clamping plate 211 identical to the second U-shaped clamping plate 221, a first rear support platform 212 disposed at the rear end of the first U-shaped clamping plate 211, a first lifting hole 213 opened on the first U-shaped clamping plate 211 and coinciding with the second lifting hole 223, and several hoist holes 214 opened on the first U-shaped clamping plate 211 and corresponding one-to-one with the connecting posts 224. The hoist hole 214 includes a first through hole and a second through hole that are interconnected. The diameter of the first through hole is larger than the diameter of the second through hole, and the first through hole is located on the side closer to the second hoisting hole 223.

[0037] In this embodiment, the first lifting hole 213 is provided through the first rear support platform 212, the second lifting hole 223 is provided through the second rear support platform 222, and the sum of the thicknesses of the first rear support platform 212 and the second rear support platform 222 is equal to the thickness of the annular support plate 200.

[0038] The following is a brief description of the usage process of this embodiment:

[0039] On the inner tube mounting platform (a mature product), the heat exchange tube 300, annular support plate 200, side support strip 400, and end cover flange 100 are welded together to obtain a horizontally arranged inner tube. The end cover connecting lug assembly is connected to the end cover flange 100 using screws. A first U-shaped clamp 211 and a second U-shaped clamp 221 are inserted from the front and rear of the annular support plate 200, respectively. The connecting post 224 is inserted into the upper pre-drilled hole 201 and the lower pre-drilled hole 202, causing the second U-shaped clamp 221 to move closer to the first U-shaped clamp 211, so that the connecting groove is fitted into the first through hole. Pulling the first U-shaped clamp 211 outwards causes the connecting groove to engage in the second through hole. The diameter of the connecting groove is the same as the second through hole to facilitate the engagement and connection of the first U-shaped clamp 211 and the second U-shaped clamp 221. When the clamp is in place, the first lifting hole 213 and the second lifting hole 223 coincide, which facilitates the connection of the lifting wire rope or lifting belt, etc.

[0040] In the initial stage of hoisting, the end cap connecting lug assembly 1 and the support plate lug assembly 2 are hoisted simultaneously using a lifting device, allowing the inner tube to leave the inner tube mounting platform. The inner tube can then be removed from the mounting platform or moved away from it, while still maintaining a horizontal layout. During the inner tube repositioning process, the hoist on one side of the end cap connecting lug assembly 1 moves upward, while one (or two) pairs of support plate lug assemblies 2 are slowly lowered until the load is fully transferred to the end cap connecting lug assembly 1, ensuring the inner tube is laid longitudinally. This allows the steel wire ropes or hoisting slings on the support plate lug assembly 2 to be released, removing the assembly and allowing the inner tube to be hoisted into the outer shell. It should be noted that the heat exchange tube remains suspended throughout the hoisting process and is not in contact with the ground.

[0041] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any changes made based on the design principles of this utility model, or any non-creative changes made on this basis, shall fall within the scope of protection of this utility model.

Claims

1. A heat exchanger inner tube hoisting device for hoisting an inner tube; the inner tube comprises an end cover flange (100), an annular support disc (200), a heat exchange tube (300) and a side support strip (400), the heat exchange tube (300) is in a U shape; the annular support disc (200) is provided with a plurality of annular support discs (200) and is sleeved on the heat exchange tube (300); the side support strip (400) is connected in an annular array on the annular support disc (200), characterized in that, The annular support disc (200) is respectively provided with an upper reserved hole (201) and a lower reserved hole (202), the inner tube hoisting device of the heat exchanger comprises an end cover connecting lifting lug assembly (1) connected with the end cover flange (100) by a screw rod, and a support disc lifting lug assembly (2) arranged on both sides of the annular support disc (200) and connected with the upper reserved hole (201) and the lower reserved hole (202); The end cover connecting lifting lug assembly (1) comprises a lifting lug connecting flange (11) connected with the end cover flange (100) by a screw rod, and an end cover connecting lifting lug (12) arranged on the lifting lug connecting flange (11); The support disc lifting lug assembly (2) comprises a first clamping plate assembly (21) and a second clamping plate assembly (22) arranged through the upper reserved hole (201) and the lower reserved hole (202) and clamping the annular support disc (200); the first clamping plate assembly (21) is connected with the second clamping plate assembly (22) by clamping.

2. A heat exchanger inner tube hoisting device according to claim 1, characterized in that, The second clamping plate assembly (22) comprises a second U-shaped clamping plate (221), a plurality of connecting columns (224) arranged on the second U-shaped clamping plate (221), a connecting groove (225) opened at the front end of the connecting column (224), and a second lifting hole (223) arranged at the rear end of the second U-shaped clamping plate (221); the connecting column (224) is arranged through the upper reserved hole (201) and the lower reserved hole (202).

3. A heat exchanger inner tube hoisting device according to claim 2, characterized in that, The first clamping plate assembly (21) comprises a first U-shaped clamping plate (211) identical to the second U-shaped clamping plate (221), a first lifting hole (213) opened on the first U-shaped clamping plate (211) and coinciding with the second lifting hole (223), and a plurality of hoist holes (214) opened on the first U-shaped clamping plate (211) and corresponding to the connecting columns (224); the hoist hole (214) comprises a first through hole and a second through hole in communication with each other; the diameter of the first through hole is greater than that of the second through hole; the first through hole is located on one side close to the second lifting hole (223).

4. A heat exchanger inner tube hoisting device according to claim 3, characterized in that, The rear end of the first U-shaped clamping plate (211) is provided with a first rear support table (212); the first lifting hole (213) is arranged through the first rear support table (212); the rear end of the second U-shaped clamping plate (221) is provided with a second rear support table (222); the second lifting hole (223) is arranged through the second rear support table (222).

5. A heat exchanger inner tube hoisting device according to claim 4, wherein The thickness sum of the first rear support table (212) and the second rear support table (222) is equal to the thickness of the annular support disc (200).

Images