Rear end sealing structure of shell-and-tube heat exchanger

Abstract

The utility model relates to the technical field of shell-and-tube heat exchangers, in particular to a rear end sealing structure of a shell-and-tube heat exchanger, which can simplify operation, play a better sealing effect and prevent leakage, is suitable for occasions of volatile, inflammable, explosive, toxic and valuable media, and comprises a tube plate and two flanges. O-shaped rings are arranged between the two flanges and the tube plate, and a lantern ring is clamped between the two flanges.

Description

Technical Field

[0001] The utility model relates to the technical field of shell and tube heat exchangers, in particular to a rear end sealing structure of a shell and tube heat exchanger. Background Art

[0002] Most of the widely used lubricating oil coolers for oil-injected screw compressors are shell and tube heat exchangers. The structural design of shell and tube heat exchangers is usually carried out according to the national standard GB / T151-2014 "Heat Exchanger", in which the rear end structure of the heat exchanger is stipulated as follows: L-type, M-type, N-type, P-type, S-type, T-type, U-type, and W-type. Among them, the W-type with sleeve ring stuffing box floating head structure is widely used in core-extractable lubricating oil coolers. Its structure is as follows Figure 1 As shown, the sealing type of the rear end structure 1 is to add a packing rope 5 between the collar 2, the flange 3 and the tube sheet 4 for sealing, and the two ends of the collar 2 extend into the packing installation area to compress the packing ropes on both sides. However, the installation operation of this packing rope is cumbersome, and if it is not installed in place or not maintained well in the later stage, the sealing part is prone to leakage, which is especially not suitable for occasions with volatile, flammable, explosive, toxic and precious media. Summary of the invention

[0003] In order to solve the problem that the existing packing rope seal is prone to leakage, the utility model provides a rear end sealing structure of a shell and tube heat exchanger, which can simplify the operation and achieve a better sealing effect to prevent leakage, and is suitable for occasions with volatile, flammable, explosive, toxic and precious media.

[0004] The technical solution is as follows: a rear end sealing structure of a shell and tube heat exchanger, which includes a tube sheet and two flanges, characterized in that an O-ring is arranged between the two flanges and the tube sheet, and a sleeve ring is clamped between the two flanges.

[0005] It is further characterized in that a chamfer for accommodating the O-ring is provided at one end of the inner side of the flange close to the collar;

[0006] The outer diameter of the collar is consistent with the outer diameter of the flange.

[0007] After adopting the utility model, the packing rope is cancelled and replaced by an O-ring with good sealing effect and convenient assembly to prevent leakage. The utility model is suitable for occasions with volatile, flammable, explosive, toxic and precious media; further, a chamfer is provided on the flange to accommodate the O-ring, and the collar is directly inserted between the two flanges to lock the sealing ring, which has good stability and is not prone to leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the prior art structure;

[0009] Figure 2It is a schematic diagram of the structure of the utility model. DETAILED DESCRIPTION

[0010] See Figure 2 As shown, a rear end sealing structure of a shell and tube heat exchanger includes a tube sheet 4 and two flanges 3, a collar 2 is clamped between the two flanges 3, a chamfer 7 is provided on the inner diameter edge of one end of the two flanges 3 close to the collar 2, an O-ring is installed in the chamfer 7, and the O-ring can be selected according to the processing accuracy of the sealing surface. The O-ring is in contact with the tube sheet 4, the flange 3, and the collar 2 to achieve the sealing between the tube sheet 4 and the flange 3, and the sealing between the flange 3 and the collar 2. And the outer diameter of the collar 2 is consistent with the outer diameter of the flange 3.

Claims

1. A rear end sealing structure of a shell and tube heat exchanger, comprising a tube sheet and two flanges, characterized in that: An O-ring is arranged between the two flanges and the tube sheet, and a collar is clamped between the two flanges; a chamfer for accommodating the O-ring is provided at one end of the inner side of the flange close to the collar.

2. A rear end sealing structure of a shell and tube heat exchanger according to claim 1, characterized in that: The outer diameter of the collar is consistent with the outer diameter of the flange.

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