CN215177195U

CN215177195U - Anti-leakage multi-tube-pass dry evaporator

Info

Publication number: CN215177195U
Application number: CN202023064013.5U
Authority: CN
Inventors: 谢礼林; 孙清华; 桂林松; 顾海华
Original assignee: Schlee Nanjing Refrigeration Machinery Manufacturing Co ltd
Current assignee: Schlee Nanjing Refrigeration Machinery Manufacturing Co ltd
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2021-12-14
Anticipated expiration: 2030-12-18

Abstract

The utility model discloses a prevent multi-tube journey dry-type evaporator of leakage, including the barrel, set up in the tube sheet of barrel front end, set up in the end cover of tube sheet front end, set up in the tube sheet with gasket between the end cover and fixed the fixed establishment of tube sheet, end cover and gasket is being provided with near axial center line department and is preventing leaking the mechanism, prevent leaking the mechanism and include a locking mechanism with tube sheet, end cover and gasket locking at least. The utility model discloses a to the improvement of tube sheet, end cover and gasket, solve middle seal gasket leakage phenomenon for the operation of multitube journey dry-type evaporator is reliable and stable.

Description

Anti-leakage multi-tube-pass dry evaporator

Technical Field

The utility model relates to an evaporator, in particular to leak-proof multi-tube pass dry evaporator.

Background

In the dry evaporator, the sealing gasket is clamped by the nut through the axial force generated by the elastic extension of the bolt between the tube plate and the tube end, and the function of sealing and preventing leakage in a split range is achieved. According to the relevant regulation of GB151-2014 heat transfer device, the groove depth of the split-ranging partition plate is larger than the thickness of the gasket and is not smaller than 4mm, the sealing surface of the partition plate groove is flush with the annular sealing surface, the groove width is preferably 8-14 mm, if the split-ranging partition plate is manufactured according to the method, the thickness of the tube plate meeting the corresponding operation pressure requirement is very thick, and meanwhile, the groove depth of the machined split-ranging partition plate is increased, so that the manufacturing cost is higher. From the economic perspective, the tube plate is not divided into the range partition grooves, and the sealing gasket is directly pre-fixed by adopting glue. Because the shell side structure groove depth Delta S is 0, the calculated thickness of the tube plate is correspondingly reduced, and meanwhile, the process of processing the groove depth of the split-range partition plate is also omitted, so that the raw material cost and the processing cost are saved. When the multi-pass tube plate is welded with the barrel, the tube plate can be deformed by a certain amount due to the influence of welding stress, the tube plate surface cannot be machined and leveled after the tube plate is welded with the barrel, and the sealing surface is positioned along the bolt hole for a circle and at the middle pass. When the sealing surface side of the multi-tube pass tube plate is processed and deformed, although the outer side of the sealing gasket can be tightly clamped through fastening of the bolts to ensure that the sealing part does not leak, the middle split-pass part of the sealing gasket is far away from the bolt hole of the tube plate or the end cover, the effective fastening and reinforcing effect of the bolts and the nuts cannot be obtained, and therefore leakage occurs and the performance of the evaporator is affected.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model provides a prevent multi-pass dry-type evaporator of leakage prevents that multi-pass tube side seal gasket from leaking, improves the operating stability of system.

The technical scheme is as follows: the utility model relates to a multi-tube journey dry-type evaporator of preventing leakage, including the barrel, set up in the tube sheet of barrel front end, set up in the end cover of tube sheet front end, set up in the tube sheet with gasket between the end cover and fixed the fixed establishment of tube sheet, end cover and gasket is being provided with near axial center line department and is preventing leaking the mechanism, prevent leaking the mechanism and include a locking mechanism with tube sheet, end cover and gasket locking at least.

The leakage-preventing mechanism comprises a first locking mechanism and a second locking mechanism which are arranged on two sides of the axial center line.

First locking mechanism include first locking double-screw bolt and with first locking nut of first locking double-screw bolt assorted, be provided with on the tube sheet and be used for fixing the first pilot hole of first locking double-screw bolt, first pilot hole be provided with first locking double-screw bolt assorted internal thread.

The second locking mechanism comprises a second locking stud and a second locking nut matched with the second locking stud, a second assembling hole used for fixing the second locking stud is formed in the tube plate, and an internal thread matched with the second locking stud is formed in the second assembling hole.

The end cover is provided with a first mounting hole for the first locking stud to pass through, and the gasket is provided with a second mounting hole for the first locking stud to pass through.

The end cover is provided with a third mounting hole for the second locking stud to pass through, and the gasket is provided with a fourth mounting hole for the second locking stud to pass through.

The inner diameters of the first mounting hole and the second mounting hole are larger than the outer diameter of the first locking stud.

The inner diameters of the third mounting hole and the fourth mounting hole are larger than the outer diameter of the second locking stud.

The fixing mechanism is a plurality of fixing bolts circumferentially arranged at the edges of the tube plate, the end cover and the gasket.

Has the advantages that: (1) the utility model solves the problem of leakage of the sealing gasket by arranging the anti-leakage mechanism at the middle split; (2) the utility model uses the nut and the stud as the locking mechanism outside the end cover, compresses the sealing gasket in the middle part, and avoids the leakage; (3) the utility model prevents the leakage of the intermediate sealing gasket through the locking mechanism, and has strong practicability, low cost, convenient processing and stable and reliable operation; (4) the utility model discloses a nut and double-screw bolt play the fastening additional strengthening effectively, prevent that the evaporimeter from taking place to leak, influence the performance of evaporimeter.

Drawings

FIG. 1 is a schematic view of the connection structure between the tube end and the tube sheet of a multi-pass dry evaporator;

FIG. 2 is an enlarged schematic view of the tube end A of the multi-pass dry evaporator;

FIG. 3 is a schematic view of a tube sheet construction;

FIG. 4 is a cross-sectional view of a tube sheet;

FIG. 5 is a schematic view of a gasket construction;

FIG. 6 is a schematic view of an end cap configuration;

FIG. 7 is a cross-sectional view of the end cap;

fig. 8 is a schematic structural view of a specific application of the end cap.

Detailed Description

Example 1: from fig. 1, a prevent multi-tube journey dry evaporator of leakage, including barrel 1, set up in the tube sheet 2 of barrel 1 front end, set up in the end cover 3 of tube sheet 2 front end, set up in gasket 4 and the fixed tube sheet 2 between tube sheet 2 and end cover 3, end cover 3 and gasket 4's fixed establishment 5, fixed establishment 5 sets up in a plurality of fixing bolt of tube sheet 2,

end cover

3 and 4 edges of gasket for circumference, fixing bolt is in the same place end cover 3, gasket 4 and tube sheet 2 are fixed.

As shown in fig. 2, a leakage preventing mechanism 6 is disposed near the axial center line 0, the leakage preventing mechanism 6 at least includes a first locking mechanism 61 for locking the tube plate 2, the end cap 3 and the gasket 4, and the number of the locking mechanisms at the middle split can be increased or decreased in due time according to the diameter of the cylinder and the number of the tube passes, so as to ensure that the sealing gasket has a certain fastening force at the middle split and does not leak. In the present embodiment, the leakage preventing mechanism 6 includes a first locking mechanism 61 and a second locking mechanism 62 provided on both sides of the axial center line 0; the first locking mechanism 61 comprises a first locking stud 611 and a first locking nut 612 that mates with the first locking stud 611; the second locking mechanism 62 includes a second locking stud 621 and a second locking nut 622 that mates with the second locking stud 621. The first locking mechanism 61 and the second locking mechanism 62 lock the tube plate 2, the end cover 3 and the gasket 4.

As shown in fig. 3 and 4, a first fitting hole 211 for a first locking stud 611 is formed in the tube plate 2, the first fitting hole 211 is provided with an internal thread matched with the first locking stud 611, a second fitting hole 212 for fixing a second locking stud 621 is formed in the tube plate 2, the second fitting hole 212 is provided with an internal thread matched with the second locking stud 621, in order to achieve quick installation and fixing of the first locking stud 611 and the second locking stud 621, the inner surfaces of the first fitting hole 211 and the second fitting hole 212 formed in the tube plate 2 are provided with internal threads matched with the external thread of the locking stud, in a specific application, the first locking stud 611 and the second locking stud 621 adopt studs of M16, and the inner diameters of the first fitting hole 211 and the second fitting hole 212 are the same as the outer diameter of the stud of M16, so as to achieve fixed installation of the first fitting hole 211 and the second fitting hole.

Accordingly, as shown in fig. 6 and 7, the end cap 3 is provided with a first mounting hole 311 for the first locking stud 611 to pass through, and a third mounting hole 312 for the second locking stud 621 to pass through. As shown in fig. 5, the spacer 4 is provided with a second mounting hole 411 for the first locking stud 611 to pass through and a fourth mounting hole 412 for the second locking stud 621 to pass through. When the first locking stud 611 and the second locking stud 621 adopt studs of M16, 2 through holes of phi 16.5 are processed at corresponding positions of the middle of the end cover 3 in a split manner to serve as a first mounting hole 311 and a third mounting hole 312, and similarly, 2 through holes of phi 16.5 are processed at corresponding positions of the gasket 4 to serve as a second mounting hole 411 and a fourth mounting hole 412, so that the inner diameters of the first mounting hole 311 and the second mounting hole 411 are larger than the outer diameter of the first locking stud 611, and the inner diameters of the third mounting hole 312 and the fourth mounting hole 412 are larger than the outer diameter of the second locking stud 621, so that when the first locking stud 611 and the second locking stud 612 can smoothly pass through the end cover 3 and the gasket 4, and one end of the first locking stud 611 and the second locking stud 612 is fixed with the assembling hole on the tube plate 2; furthermore, the outside of the end cover 3 is fastened and reinforced by a nut and a stud of M16, thereby the gasket 4 at the middle part is pressed tightly and the leakage is avoided.

Application example: when the structure of the embodiment 1 is applied to a multi-tube pass tube plate, such as a phi 245mm and gamma four-tube pass dry evaporator, 2 phi 16.5 through holes are processed at the corresponding part of the middle branch of the end cover of the left tube end of the four-tube pass dry evaporator, see fig. 8, 2M 16 threaded holes are processed at the corresponding part of the tube plate, 2M 16 high-strength double-ended studs penetrate through the phi 16.5 holes of the end cover 3 to be connected with the tube plate 2, and M16 nuts and studs are fastened and reinforced at the outer side of the end cover 3, so that the fastening force compresses a sealing gasket at the middle part through the tube end and the tube plate, the leakage is avoided, and the leakage phenomenon of the middle sealing gasket is well solved.

Claims

1. The anti-leakage multi-pass dry evaporator is characterized by comprising a barrel (1), a tube plate (2) arranged at the front end of the barrel (1), an end cover (3) arranged at the front end of the tube plate (2), a gasket (4) arranged between the tube plate (2) and the end cover (3) and a fixing mechanism (5) for fixing the tube plate (2), the end cover (3) and the gasket (4), wherein an anti-leakage mechanism (6) is arranged at a position close to an axial central line (O), and the anti-leakage mechanism (6) at least comprises a first locking mechanism (61) for locking the tube plate (2), the end cover (3) and the gasket (4).

2. A leak-proof multi-pass dry evaporator according to claim 1, characterized in that the leak-proof mechanism (6) comprises a first locking mechanism (61) and a second locking mechanism (62) arranged on both sides of the axial center line (O).

3. A leak-proof multi-pass dry evaporator according to claim 2, characterized in that the first locking mechanism (61) comprises a first locking stud (611) and a first locking nut (612) matching the first locking stud (611), the tube sheet (2) is provided with a first fitting hole (211) for fixing the first locking stud (611), and the first fitting hole (211) is provided with an internal thread matching the first locking stud (611).

4. A leak-proof multi-pass dry evaporator according to claim 3, characterized in that the second locking mechanism (62) comprises a second locking stud (621) and a second locking nut (622) mating with the second locking stud (621), the tube sheet (2) is provided with a second fitting hole (212) for fixing the second locking stud (621), and the second fitting hole (212) is provided with an internal thread mating with the second locking stud (621).

5. A leak-proof multi-pass dry evaporator according to claim 4, characterized in that the end cover (3) is provided with first mounting holes (311) for the first locking studs (611) to pass through, and the gasket (4) is provided with second mounting holes (411) for the first locking studs (611) to pass through.

6. A leak resistant multi-pass dry evaporator according to claim 5, characterized in that the end cap (3) is provided with third mounting holes (312) for the second locking studs (621) to pass through, and the gasket (4) is provided with fourth mounting holes (412) for the second locking studs (621) to pass through.

7. A leak resistant multi-pass dry evaporator according to claim 6, wherein the inner diameter of the first mounting hole (311) and the second mounting hole (411) is larger than the outer diameter of the first locking stud (611).

8. A leak resistant multi-pass dry evaporator according to claim 7, wherein the third mounting hole (312) and fourth mounting hole (412) have an inner diameter larger than the outer diameter of the second locking stud (621).

9. A leak resistant multi-pass dry evaporator according to claim 8, characterized in that the fixing means (5) are several fixing bolts circumferentially arranged at the edges of the tube sheet (2), end cover (3) and gasket (4).