Anti-vibration supporting structure of baffle fence in baffle plate shell-and-tube heat exchanger

Abstract

The utility model discloses an anti-vibration supporting structure of a baffle fence in a baffle plate shell-and-tube heat exchanger. The anti-vibration supporting structure solves the problem of how to avoid large-amplitude vibration of a baffle plate. The baffle fence is formed by connecting an upper baffle fence (5) and a lower baffle fence (6) in an abutting mode, a baffle plate pull rod (4) is connected between the upper baffle fence (5) and the lower baffle fence (6) in a penetrating mode, a left side cover plate (7) is connected to the left side vertical face of the upper baffle fence (5) in a welded mode, and a left side cover plate center through hole (9) is formed in the middle of the left side cover plate (7). A baffle plate pull rod (4) is connected in the left side cover plate central through hole (9) in a penetrating mode, the annular outer side end of the left side cover plate central through hole (9) is connected with the baffle plate pull rod (4) in a welded mode, a right side cover plate (8) is connected to the right side vertical face of the lower baffle fence (6) in a welded mode, and the annular outer side end of a right side cover plate central through hole (10) is connected with the baffle plate pull rod (4) in a welded mode. And the operation safety of the baffle plate shell-and-tube heat exchanger is ensured.

Description

Technical Field

[0001] The utility model relates to a baffle shell and tube heat exchanger, in particular to a support structure of an anti-vibration baffle grid in the baffle shell and tube heat exchanger. Background Art

[0002] Shell and tube heat exchangers are process equipment used for heat exchange between different materials. They are widely used in the power, chemical, oil refining, refrigeration, metallurgy, environmental protection and other industries. Shell and tube heat exchangers connect tubes and tube sheets and then fix them with shells. They are composed of heads, tube sheets, baffles and shells. The functions of baffles are: (1) as a support structure for tubes; (2) to increase the velocity of the shell-side fluid and make the fluid pass across the tube bundle, thereby enhancing the heat transfer on the shell side. Since baffles act as baffles, they are usually called baffles, and the corresponding heat exchangers are also called baffle shell and tube heat exchangers, but baffles It will cause induced vibration of the fluid, and the vibration amplitude perpendicular to the flow direction is higher than the amplitude in the flow direction, causing the amplitude of the tube bundle vibration to increase with the increase of flow velocity, leading to damage of the heat exchange tubes; the baffles in the prior art are formed by welding horizontal and vertical baffle rods to a support ring to form a baffle grid, and the baffle grid is positioned and fixed by inserting a spacing tube into the pull rod and using nuts at the end; when the baffle heat exchanger has been running for a long time, the fixing bolts of the baffles are often loose, resulting in aggravated vibration of the baffle grid, which directly causes the heat exchange tube to rupture and affects the safe operation of the equipment. Summary of the invention

[0003] The utility model provides an anti-vibration support structure of a baffle grid in a baffle shell and tube heat exchanger, which solves the technical problem of how to avoid large vibration of the baffle.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] The invention discloses an anti-vibration support structure of a baffle grid in a baffled shell and tube heat exchanger, comprising a left tube sheet and a right tube sheet, a heat exchange tube is arranged between the left tube sheet and the right tube sheet, a baffle grid is arranged on the heat exchange tube, the baffle grid is composed of an upper baffle grid and a lower baffle grid connected together, a baffle plate pull rod is passed through between the upper baffle grid and the lower baffle grid, a left cover plate is welded and connected to the left vertical surface of the upper baffle grid, a left cover plate central through hole is arranged in the middle of the left cover plate, and a baffle plate central through hole is arranged on the left side. A baffle rod is passed through the central through hole of the cover plate, and the annular outer end of the central through hole of the left cover plate is welded to the baffle rod. A right cover plate is welded to the right vertical surface of the lower baffle grid, and a right cover plate central through hole is provided in the middle of the right cover plate, and a baffle rod is passed through the central through hole of the right cover plate, and the annular outer end of the central through hole of the right cover plate is welded to the baffle rod, and one side end of the baffle rod is fixedly connected to the left tube sheet.

[0006] The upper baffle grid is composed of a left annular support ring and a left baffle rod, in which the left baffle rods are arranged parallel to each other at equal intervals in the left annular support ring; the lower baffle grid is composed of a right annular support ring and a right baffle rod, in which the right baffle rods are arranged parallel to each other at equal intervals in the right annular support ring; after the upper baffle grid is abutted against the lower baffle grid, the two adjacent left baffle rods and the two adjacent right baffle rods form a rhombus shape, and the baffle plate pull rod is connected in the rhombus; spot welding points are arranged at the intersection of the left baffle rod and the right baffle rod.

[0007] The baffle grid of the utility model is easy to install, can effectively absorb the vibration of the baffle grid, avoids the baffle grid from vibrating greatly, and ensures the safe operation of the baffle plate shell and tube heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural schematic diagram of the utility model;

[0009] Figure 2 It is a schematic diagram of the connection structure between the baffle grid and the baffle plate tie rod 4 of the utility model;

[0010] Figure 3 It is a structural schematic diagram of the upper baffle grid 5 of the utility model;

[0011] Figure 4 It is a schematic structural diagram of the lower baffle grid 6 of the utility model;

[0012] Figure 5 It is a structural schematic diagram of the left side cover plate 7 of the utility model;

[0013] Figure 6 It is a schematic structural diagram of the upper baffle grid 5 and the lower baffle grid 6 clamping the baffle plate pull rod 4. Implementation

[0014] The utility model is described in detail below with reference to the accompanying drawings:

[0015] A vibration-proof support structure for a baffle grid in a baffle shell and tube heat exchanger, comprising a left tube sheet 1 and a right tube sheet 2, a heat exchange tube 3 is arranged between the left tube sheet 1 and the right tube sheet 2, a baffle grid is arranged on the heat exchange tube 3, the baffle grid is sleeved on the heat exchange tube 3, the baffle grid is composed of an upper baffle grid 5 and a lower baffle grid 6 which are stacked together after being close together, a baffle rod 4 is passed through between the upper baffle grid 5 and the lower baffle grid 6, a left cover plate 7 is welded to the left vertical surface of the upper baffle grid 5, a left cover plate central through hole 9 is arranged in the middle of the left cover plate 7, the baffle rod 4 is passed through the left cover plate central through hole 9, the annular outer end of the left cover plate central through hole 9 is welded to the baffle rod 4, a right cover plate 8 is welded to the right vertical surface of the lower baffle grid 6, and a right The side cover plate has a central through hole 10, and a baffle rod 4 is passed through the central through hole 10 of the right cover plate. The annular outer end of the central through hole 10 of the right cover plate is welded to the baffle rod 4, and one side end of the baffle rod 4 is fixedly connected to the left tube plate 1; the baffle rod 4 plays a cantilever support role for the baffle grid, the baffle rod 4 is welded and fixed to the rhombus-shaped left cover plate 7, and the left cover plate 7 is welded and connected to the left vertical surface of the upper baffle grid 5, and the lower baffle grid 6 is abutted on the right vertical surface of the upper baffle grid 5, and the rhombus-shaped right cover plate 8 is welded and connected to the right vertical surface of the lower baffle grid 6, and the right cover plate 8 is welded and connected to the baffle rod 4. This support and fixing method of the baffle grid has a flexible crimping characteristic, which can absorb the vibration of the baffle grid, greatly reduce the vibration amplitude of the baffle grid during operation, and reduce the damage rate of the heat exchange tube.

[0016] The upper baffle 5 is composed of a left annular support ring 11 and a left baffle rod 12. In the left annular support ring 11, the left baffle rods 12 are arranged in parallel with each other at equal intervals. The lower baffle 6 is composed of a right annular support ring 13 and a right baffle rod 14. In the right annular support ring 13, the right baffle rods 14 are arranged in parallel with each other at equal intervals. After the upper baffle 5 and the lower baffle 6 are abutted, the adjacent two left baffle rods 12 and the adjacent two right baffle rods 14 form a rhombus shape, and the baffle plate pull rod 4 is connected to the baffle plate 11. In this rhombus, the left baffle rod 12 in the upper baffle grid 5 and the right baffle rod 14 in the lower baffle grid 6 are arranged at a certain rotation angle, forming a snap-fit ​​connection form for the baffle plate pull rod 4 passing therethrough, which not only fixes the baffle grid on the baffle plate pull rod 4, but also flexibly absorbs the vibration of the baffle grid; the cross-contact points of the left baffle rod 12 and the right baffle rod 14 are spot welded together to form spot welding points 15, which further fix the two baffle grids together.

Claims

1. An anti-vibration support structure for a baffle grid in a baffle shell and tube heat exchanger, comprising a left tube sheet (1) and a right tube sheet (2), a heat exchange tube (3) being arranged between the left tube sheet (1) and the right tube sheet (2), and a baffle grid being arranged on the heat exchange tube (3), characterized in that: The baffle grid is composed of an upper baffle grid (5) and a lower baffle grid (6) connected together, a baffle plate tie rod (4) is connected between the upper baffle grid (5) and the lower baffle grid (6), a left cover plate (7) is welded and connected to the left vertical surface of the upper baffle grid (5), a left cover plate central through hole (9) is provided in the middle of the left cover plate (7), a baffle plate tie rod (4) is connected in the left cover plate central through hole (9), and the annular outer end of the left cover plate central through hole (9) is connected to the baffle plate A right cover plate (8) is welded to the right side elevation of the lower baffle grid (6), a right cover plate central through hole (10) is provided in the middle of the right cover plate (8), a baffle plate tie rod (4) is passed through the right cover plate central through hole (10), an annular outer end of the right cover plate central through hole (10) is welded to the baffle plate tie rod (4), and one end of the baffle plate tie rod (4) is fixedly connected to the left tube sheet (1).

2. The anti-vibration support structure of the baffle grid in the baffle shell and tube heat exchanger according to claim 1, characterized in that: The upper baffle grid (5) is composed of a left annular support ring (11) and a left baffle rod (12), in which the left baffle rods (12) are arranged in parallel with each other at equal intervals in the left annular support ring (11); the lower baffle grid (6) is composed of a right annular support ring (13) and a right baffle rod (14), in which the right baffle rods (14) are arranged in parallel with each other at equal intervals in the right annular support ring (13); after the upper baffle grid (5) and the lower baffle grid (6) are abutted, two adjacent left baffle rods (12) and two adjacent right baffle rods (14) form a rhombus shape, and the baffle plate pull rod (4) is connected in the rhombus; and spot welding points (15) are arranged at the intersection of the left baffle rod (12) and the right baffle rod (14).

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