CN201425438Y

CN201425438Y - Sleeve type heat-exchanger

Info

Publication number: CN201425438Y
Application number: CN2009201717162U
Authority: CN
Inventors: 陈永东
Original assignee: Hefei General Machinery Research Institute Co Ltd
Current assignee: Hefei General Machinery Research Institute Co Ltd
Priority date: 2009-04-24
Filing date: 2009-04-24
Publication date: 2010-03-17
Anticipated expiration: 2019-04-24

Abstract

A sleeve type heat-exchanger is characterized in that a locking nut between an inner tube and an inner tube tube-sheet is a dual-nut structure, wherein an inner tube tubular joint is fixedly connectedon the tube end of the inner tube, the joint sealing surface which is provided with the inner tube tubular joint is a pyramidal face, the inner tube tube-sheet and a joint sealing surface are correspondingly arranged and form tube-sheet sealing faces which are matched in a sealing mode, and the tube-sheet sealing faces are also pyramidal faces, an outer tube tubular box is arranged into a detachable structure, a shell body flange is fixedly connected on the end surface of the tubular box shell body, and the shell body flange and an outer tube tube-sheet are fixedly connected through a detachable screw bolt. The heat-exchanger can eliminate the vibration generating when fluid medium flushes the inner tube, improves the sealing effect, improves the reliability of repeated installation, andis convenient to clean the inner tube and the outer tube.

Description

Double pipe heat exchanger

Technical field

The utility model relates to the heat exchange device, the double pipe heat exchanger of more specifically saying so.

Background technology

Double pipe heat exchanger usually uses in the less occasion of heat transfer area, and its space more required than the shell-and-tube heat exchanger of same heat exchange area is big, but owing to its advantage such as simple in structure, easily manufactured is widely used as all kinds of cooling devices.

The heat-transfer area of double pipe heat exchanger is made up of the pipe of arranging in groups, from top to bottom, is from left to right linked together by return bend.Its core is made up of two concentric inner and outer pipes.Double pipe heat exchanger generally is divided into: single double-tube heat exchanger structure and many double-tube heat exchangers structure.Because the treating capacity of the outer medium of single double-tube heat exchanger structural tube is limited, use many double-tube heat exchangers structure under the more conditions.

Traditional many double-tube heat exchangers version is shown in Fig. 1 and Fig. 1 a, and its outer tube 2 is welded on the outer tube tube sheet 6, and outer tube tube sheet 6 and shell body are formed outer tube bobbin carriage 5, and outer tube bobbin carriage 5 is non-disconnectable; The type of attachment of interior pipe assembly and interior pipe tube sheet 4 is shown in Fig. 1 and Fig. 1 a, and the pipe end of interior pipe 1 is welded with pipe joint 3, and on the pipe tube sheet 4, interior pipe tube sheet 4 is clamped between two flanges pipe joint 3 by nut 7 lockings and in being fixed on.This double pipe heat exchanger when the outer tube flow media flows into from the outer tube bobbin carriage, on the pipe 1, is managed 1 vibration in being flushed in can causing when actual motion.This vibration usually causes the loosening of the nut 7 that is used to lock.In addition; because the sealing surface 3a of pipe joint 3 is a sphere, the sealing between the pore of pipe joint 3 and interior pipe tube sheet 4 is line-face sealing, and the pretightning force during pretension is restive; not the matching of hardness between pipe joint 3 and the interior pipe tube sheet 4 usually can form impression on sphere in addition.Be difficult to return to the preceding odjective causes such as position of dismounting after this impression and dismounting maintenance re-assembly and cause seal failure, add the loosening of nut 7, produce leakage to a certain degree between the inner and outer pipes medium.Leak the unnecessary economic loss that gently then causes shut-down (breakdown) mainteance to bring, heavy then can cause the baneful influence that mixes generation between the two media.In addition, because outer tube bobbin carriage 5 is non-disconnectable, the cleaning between interior pipe and the outer tube is inconvenience very.

The utility model content

The utility model is for avoiding above-mentioned existing in prior technology weak point, a kind of double pipe heat exchanger is provided, to eliminate because of flow media washes away the vibration that interior pipe causes, improve sealing effectiveness, improve the reliability that repeats to install, being convenient to the cleaning between the inner and outer pipes.

The utility model technical solution problem adopts following technical scheme:

Locking nut in the design feature of the utility model double pipe heat exchanger is arranged between pipe and the interior pipe tube sheet is a double nuts structure; Pipe pipe joint in the pipe end of interior pipe is fixedly connected, the joint sealing face of pipe pipe joint is the conical surface in being provided with, relative set interior pipe tube sheet and joint sealing face form the tube sheet sealing surface that is sealed and matched and also are the conical surface; It is removable structure that the outer tube bobbin carriage is set, and removable structure is at the fixedly connected shell flange of the end face of bobbin carriage housing, between shell flange and outer tube tube sheet, connects with dismountable bolting.

Compared with the prior art, the utility model beneficial effect is embodied in:

1, the utility model adopts the double nut locking mechanism between interior pipe and interior pipe tube sheet, has eliminated because of flow media washes away interior pipe to cause the nut loosening that vibration causes.

2, the utility model becomes conical surface seal with sealing surface by line-face seal en-hancement, has not only improved sealing effectiveness, has improved the reliability that repeats to install simultaneously.

3, the utility model outer tube bobbin carriage is a removable structure, is very easy to the cleaning between the inner and outer pipes.

Description of drawings

Fig. 1 is the prior art structural representation.

Fig. 1 a is an inner pipe joint partial enlarged view in the prior art shown in Figure 1.

Label among Fig. 1 and Fig. 1 a: manage tube sheet, 5 outer tube bobbin carriages, 6 outer tube tube sheets, 7 locking nuts in pipe, 2 outer tubes, 3 pipe joints, 4 in 1.

Fig. 2 is the utility model structural representation.

Fig. 2 a is the utility model inner pipe joint partial enlarged view.

Fig. 2 b is the utility model outer tube bobbin carriage removable structure schematic diagram.

Label among Fig. 2 and Fig. 2 a, Fig. 2 b: manage tube sheet, 3a tube sheet sealing surface, 4 locking nuts, 5 outer tube tube sheets, 6 bobbin carriage shell flanges, 7 bobbin carriage housings in pipe, 2 pipe joints, the 2a joint sealing face, 3 in 1.

Below pass through the specific embodiment, and the utility model is described in further detail in conjunction with the accompanying drawings.

The specific embodiment

Referring to Fig. 2, Fig. 2 a and Fig. 2 b, present embodiment is at double pipe heat exchanger, and the locking nut 4 in being arranged between pipe 1 and the interior pipe tube sheet 3 is double nuts structure; Pipe pipe joint 2 in the pipe end of interior pipe 1 is fixedly connected, the joint sealing face 2a of pipe pipe joint 2 is the conical surface in being provided with, the interior pipe of relative set tube sheet 3 forms the tube sheet sealing surface 3a that is sealed and matched with joint sealing face 2a and also is the conical surface; It is removable structure that the outer tube bobbin carriage is set, and specifically is at the fixedly connected shell flange 6 of the end face of bobbin carriage housing 7, between shell flange 6 and outer tube tube sheet 5, connects with dismountable bolting.

Claims

1, a kind of double pipe heat exchanger is characterized in that:

The locking nut (4) that is arranged between interior pipe (1) and the interior pipe tube sheet (3) is a double nuts structure;

The pipe end of pipe (1) is managed pipe joint (2) in fixedly connected in described, the joint sealing face (2a) of pipe pipe joint (2) is the conical surface in being provided with, and relative set interior pipe tube sheet (3) forms the tube sheet sealing surface (3a) that is sealed and matched with described joint sealing face (2a) and also is the conical surface;

It is removable structure that the outer tube bobbin carriage is set, and described removable structure is the fixedly connected shell flange of end face (6) at bobbin carriage housing (7), between described shell flange (6) and outer tube tube sheet (5), connects with dismountable bolting.