Flow guide structure and heat exchanger
By installing a sleeve on the outside of the shell and connecting it with a variable diameter, the problems of alignment and welding accuracy during the welding of the shell and the outer guide tube are solved, thus achieving a robust structure and efficient heat exchange in the heat exchanger.
Patent Information
- Application Number
- CN202520354126.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-03-03
AI Technical Summary
The difficulty in aligning the shell and the outer guide tube during welding resulted in low welding precision and a large load on the connection, leading to an unstable heat exchanger structure.
A cylindrical body is fitted outside the shell, with the inner diameter of the cylindrical body being larger than the outer diameter of the shell. The cylindrical body is connected by a variable diameter to form an annular cavity. A through hole is set inside the cylindrical body to guide the medium into the U-shaped pipe bend, thereby increasing the shell strength and reducing welding requirements.
The structural integrity and welding strength of the shell are improved, ensuring the heat exchanger structure is robust, enhancing the heat exchange effect between the medium and the U-tube, and improving the heat exchange efficiency.
Smart Images
Figure CN223925491U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to heat exchanger technical field especially relates to a flow guide structure and heat exchanger. BACKGROUND
[0002] Heat exchangers are widely used in petroleum processing, chemical industry. Among them, U-tube heat exchanger includes shell, the first end of shell is welded outer flow guide cylinder and shell stretches into outer flow guide cylinder, the upper end of outer flow guide cylinder outside sets in, the second end of shell sets pipe plate, the inside of shell staggered interval sets baffle, U-tube passes through baffle and is fixed on pipe plate, the end of U-tube away from pipe plate corresponds to the axial clearance between shell and outer flow guide cylinder, when in-pipe passes into medium, medium first impact shell, then enters shell through clearance to protect U-tube.
[0003] However, shell is difficult to center when being welded with outer flow guide cylinder, welding precision is low, and the connecting part bears large weight after welding, and the heat exchanger is easy to be damaged.
[0004] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present disclosure, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY
[0005] In view of the deficiencies of the prior art, the utility model discloses a flow guide structure and heat exchanger to solve the problem of heat exchanger structure not firm caused by shell part inserted into outer flow guide cylinder and then welded.
[0006] The technical scheme adopted by the utility model is as follows:
[0007] A flow guide structure for a heat exchanger, the heat exchanger comprising a shell, the shell being a hollow structure, the flow guide structure comprising: a cylinder body, fitted on the first end of the shell outside, the inner diameter of the cylinder body being greater than the outer diameter of the shell, the cylinder body being connected with the shell outside through variable diameter at both ends, so as to enclose an annular cavity with the shell; a first inlet pipe, provided on the upper end of the cylinder body outside; a through hole, provided on the shell, corresponding to the inside of the cylinder body.
[0008] Further, the through hole has a plurality of annular intervals on the shell.
[0009] Further, the through hole is located corresponding to the first end of the first inlet pipe.
[0010] Further, the cylinder body is symmetrically provided with variable diameter cylinders at both ends, the large ends of the two variable diameter cylinders are connected with the cylinder body at both ends respectively, and the small ends of the two variable diameter cylinders are connected with the shell outside respectively.
[0011] The utility model discloses a heat exchanger, the heat exchanger includes: casing, for hollow structure, second end sets up tube sheet, diversion structure, as aforementioned, set up on the casing, baffle, have several pieces, up and down staggered interval set up on the inner wall of casing, all baffle all be located second end of the through -hole, U -shaped tube, first end is located below the through -hole, second end passes through the baffle and is fixed on the tube sheet on second end, first outlet pipe, set up on the casing upper portion second end.
[0012] Further technical solutions are that the tube sheet second end sets up pipe box, the pipe box is hollow structure, the U-shaped tube second end communicates with the pipe box inside.
[0013] Further technical solutions are that the pipe box inside and tube plate between horizontal arrangement baffle, the baffle divides the pipe box inside into two cavity that do not communicate with each other, the pipe box upper end sets up second inlet, the pipe box lower end sets up second outlet.
[0014] Further technical solutions are that the casing lower end interval sets up two supports.
[0015] The beneficial effects of the embodiments of the utility model are as follows:
[0016] (I) the diversion structure and the heat exchanger of the utility model embodiment, through the casing of the barrel body is set on the outside of the casing, the casing structure is complete, guarantees the casing strength, simultaneously because the inner diameter of the barrel body is greater than the outer diameter of the casing, passes through the barrel body and the casing variable diameter connection, the barrel body and the casing connection place does not bear the weight of the heat exchanger, and the welding precision and the welding strength requirement are low, to ensure that the heat exchanger structure is firm.
[0017] (II) further, the heat exchanger structure is simple, and the first medium starts from the elbow pipe of the U-shaped tube, flows to the straight pipe end of the U-shaped tube after passing through the baffle multiple times, and the first medium is fully contacted with the U-shaped tube, and the heat exchange efficiency is high. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is the internal structure schematic view of the heat exchanger of the utility model.
[0019] Figure 2 It is the structure schematic view of the heat exchanger of the utility model.
[0020] Figure 3 It is Figure 1 The section view at A-A.
[0021] In the drawing:
[0022] 1, shell; 11, through hole; 12, first outlet pipe; 13, support; 14, baffle; 2, tube plate; 3, U-shaped tube; 31, straight pipe; 32, elbow; 4, tube box; 41, second inlet pipe; 42, second outlet pipe; 43, partition; 5, cylinder; 51, first inlet pipe; 52, reducing cylinder. DETAILED DESCRIPTION
[0023] The specific embodiments of the present application will be described below with reference to the accompanying drawings.
[0024] In order to make the purpose, technical scheme and advantages of the present application more clear, the device proposed by the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present application will be more clear. It should be noted that the drawings are greatly simplified and all use non-precise proportions, only to facilitate and clarify the purpose of assisting the description of the embodiments of the present application. In order to make the purpose, features and advantages of the present application more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structure, proportion, size and the like shown in the drawings attached to the present application are only used to cooperate with the content disclosed in the specification, so that those skilled in the art can understand and read, and are not used to limit the conditions of the implementation of the present application, so they do not have the technical essence, any modification of the structure, change of the proportion relationship or adjustment of the size, as long as it does not affect the effect and purpose that can be achieved by the present application, it should still fall within the scope of the technical content disclosed by the present application.
[0025] First embodiment:
[0026] The present embodiment discloses a flow guide structure.
[0027] As shown in Figure 1 , the flow guide structure is used for a heat exchanger, the heat exchanger comprises a shell 1, the shell 1 is a hollow structure, and the flow guide structure comprises a cylinder 5, a first inlet pipe 51 and a through hole 11. The cylinder 5 is sleeved on the outer side of the first end of the shell 1, the inner diameter of the cylinder 5 is greater than the outer diameter of the shell 1, and the two ends of the cylinder 5 are connected with the outer side of the shell 1 in a variable diameter manner, so that the cylinder 5 and the shell 1 enclose an annular cavity. The first inlet pipe 51 is arranged on the outer side of the upper end of the cylinder 5. The through hole 11 is arranged on the shell 1, and the position corresponds to the inside of the cylinder 5. As shown in Figure 2 , for example, the through hole 11 has a plurality of annular intervals arranged on the shell 1. The two ends of the cylinder 5 are symmetrically provided with a reducing cylinder 52, the large ends of the two reducing cylinders 52 are respectively connected with the two ends of the cylinder 5, and the small ends of the two reducing cylinders 52 are respectively connected with the outer side of the shell 1. Specifically, the cylinder 5 and the reducing cylinder 52 are integrally formed, and the reducing cylinder 52 is welded with the shell 1.
[0028] As shown in Figure 1As shown, the through hole 11 is located at the first end of the first inlet pipe 51, which avoids the first medium from directly impacting the surface of the U-shaped tube 3, and at the same time guides the first medium to contact the bend 32 of the U-shaped tube 3 first, thereby improving the heat exchange effect at the bend 32 of the U-shaped tube 3 and saving energy.
[0029] In this embodiment, by fitting the cylinder 5 onto the outside of the shell 1, the shell 1 remains structurally intact, ensuring its strength. Meanwhile, since the inner diameter of the cylinder 5 is larger than the outer diameter of the shell 1, the cylinder 5 is connected to the shell 1 with a variable diameter. The connection between the cylinder 5 and the shell 1 does not bear the weight of the heat exchanger, thus requiring lower welding precision and strength, thereby ensuring a robust heat exchanger structure.
[0030] Second embodiment:
[0031] This embodiment discloses a heat exchanger.
[0032] like Figures 1-3 As shown, the heat exchanger includes a shell 1, a flow guiding structure, baffles 14, a U-shaped tube 3, and a first outlet tube 12. The shell 1 is a hollow structure, with a tube sheet 2 installed at the second end. The flow guiding structure, as in the first embodiment, is installed on the shell 1. Several baffles 14 are arranged alternately on the inner wall of the shell 1, with all baffles 14 located at the second end of the through hole 11. The first end of the U-shaped tube 3 is located below the through hole 11, and the second end passes through the baffles 14 and is fixed to the tube sheet 2. The first outlet tube 12 is located at the upper second end of the shell 1.
[0033] For example, the tube sheet 2 and the baffle plate 14 are welded to the shell 1, and both the tube sheet 2 and the baffle plate 14 are vertically arranged. The U-shaped tube 3 includes a bend 32 corresponding to a central angle of 180° and two straight tubes 31 connected in parallel to both ends of the bend 32. The first medium enters the shell 1 through the first inlet pipe 51, and after being deflected multiple times by the baffle plate 14, it is discharged from the first outlet pipe 12.
[0034] Furthermore, a tube box 4 is provided at the second end of the tube sheet 2. The tube box 4 has a hollow structure, and the second end of the U-shaped tube 3 is connected to the interior of the tube box 4. A partition 43 is horizontally arranged between the interior of the tube box 4 and the tube sheet 2, dividing the interior of the tube box 4 into two non-communicating cavities. A second inlet is provided at the upper end of the tube box 4, and a second outlet is provided at the lower end of the tube box 4. The second medium enters one of the cavities through the second inlet pipe 41, then returns to the other cavity through the U-shaped tube 3, and finally exits from the second outlet pipe 42. The first medium and the second medium exchange heat in the shell 1.
[0035] Furthermore, two supports 13 are provided at a distance from the lower end of the shell 1 to support the entire heat exchanger.
[0036] In the embodiment, the heat exchanger has simple structure, the first medium flows from the bent pipe 32 of the U-shaped pipe 3, and flows to the end of the straight pipe 31 of the U-shaped pipe 3 after being folded by the baffle 14 for multiple times, the first medium is fully contacted with the U-shaped pipe 3, and the heat exchange efficiency is high.
[0037] The technical features of the above embodiments can be combined in any manner, and to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered that the combinations are within the scope of the description.
[0038] The above embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but it should not be understood as the limitation of the utility model patent scope. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.
Claims
1. A flow guiding structure, characterized in that, The application discloses a heat exchanger, which comprises a shell, a guide structure and a baffle plate. A cylinder is arranged at the first end outside the shell, the inner diameter of the cylinder is larger than the outer diameter of the shell, and the two ends of the cylinder are connected with the shell outside in a variable diameter mode, so that the cylinder and the shell enclose an annular cavity; a first inlet pipe is arranged on the upper end outside the cylinder. A plurality of through holes are arranged on the shell in a ring shape.
2. The flow guiding structure of claim 1, wherein: The through holes are located at the first end of the first inlet pipe.
3. The flow guiding structure of claim 1, wherein: The two ends of the cylinder are symmetrically provided with variable diameter cylinders, the large ends of the two variable diameter cylinders are connected with the two ends of the cylinder respectively, and the small ends of the two variable diameter cylinders are connected with the shell outside respectively.
4. The flow guide structure of claim 1, wherein: The heat exchanger comprises:
5. Heat exchanger, characterized in that The shell is a hollow structure, and a tube plate is arranged at the second end; The guide structure is arranged on the shell, and the guide structure is as claimed in any one of claims 1-4; The baffle plate has a plurality of blocks, which are arranged on the inner wall of the shell in an up-down staggered mode, and all the baffle plates are located at the second end of the through hole; A U-shaped pipe is arranged below the through hole, and the second end of the U-shaped pipe penetrates through the baffle plate and is fixed on the tube plate; and a first outlet pipe is arranged on the upper second end of the shell. The second end of the tube plate is provided with a tube box, the tube box is a hollow structure, and the second end of the U-shaped pipe is communicated with the inside of the tube box.
6. The heat exchanger of claim 5, wherein: A partition plate is arranged horizontally between the inside of the tube box and the tube plate, the inside of the tube box is divided into two cavities which are not communicated with each other by the partition plate, a second inlet is arranged on the upper end of the tube box, and a second outlet is arranged on the lower end of the tube box.
7. The heat exchanger of claim 6, wherein: Two supports are arranged at the lower end of the shell in a spaced mode.
8. The heat exchanger of claim 5, wherein: