CN212300039U

CN212300039U - Head exhaust structure for hydrostatic test of aluminum plate-fin heat exchanger

Info

Publication number: CN212300039U
Application number: CN202020521450.6U
Authority: CN
Inventors: 李引平; 宋晓娟; 何剑峰; 周胜利; 章明; 崔辉
Original assignee: Fafu Cryogenic Equipment Suzhou Co ltd
Current assignee: Fafu Cryogenic Equipment Suzhou Co ltd
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2021-01-05
Anticipated expiration: 2030-04-10

Abstract

The utility model discloses an aluminium system plate-fin heat exchanger hydrostatic test's head exhaust structure, including the head end plate, the top of head end plate is provided with the atmospheric joint, the blow-down pipe is installed to the front end of atmospheric joint, the stop valve is installed to the front end of blow-down pipe, the top of stop valve is provided with the manometer. The beneficial effects of the utility model are that, the utility model discloses an exhaust structure's principle is simple, and the preparation is convenient, can be applicable to the water pressure exhaust work of each passageway, each type head. The exhaust structure is rigorous and reliable in design, can bear large pressure load at low temperature, and is small in failure risk. The blow-down pipe is connected with the pressure gauge in a threaded manner and then welded with the blow-down connector, so that the test pressure in the channel during the hydrostatic test can be effectively measured, and the accuracy of the test can be verified. The emptying joint can be cut off after the hydrostatic test, and the removed emptying pipe and the pressure gauge can be reused.

Description

Head exhaust structure for hydrostatic test of aluminum plate-fin heat exchanger

Technical Field

The utility model relates to a novel exhaust structure, in particular to aluminum plate-fin heat exchanger hydrostatic test's head exhaust structure.

Background

The aluminum plate-fin heat exchanger is a multi-flow and efficient heat exchange device, a pressure test is needed to verify the strength, rigidity and overall performance of the device after the manufacturing is completed, a hydrostatic test is usually adopted in the pressure test of the heat exchanger, but due to the structural particularity of the heat exchanger, an exhaust hole needs to be formed in the top of each channel when the water filling process of the hydrostatic test is completed. According to the existing method, when the heat exchanger is horizontally arranged, circular holes are formed in the tops of the end sockets of the channels, the circular holes are welded and sealed after a hydraulic test is completed, and then a pneumatic test is carried out to verify the compactness of the welding line. However, the sealing welding quality is difficult to ensure, the back surface is not well formed after welding, defects exist, cracks may be caused due to stress concentration when the equipment is used, and the risk exists. Plate-fin heat exchangers.

The aluminum plate-fin heat exchanger is a multi-flow and efficient heat exchange device, a pressure test is needed to verify the strength, rigidity and overall performance of the device after the manufacturing is completed, a hydrostatic test is usually adopted in the pressure test of the heat exchanger, but due to the structural particularity of the heat exchanger, an exhaust hole needs to be formed in the top of each channel when the water filling process of the hydrostatic test is completed. According to the existing method, when the heat exchanger is horizontally arranged, circular holes are formed in the tops of the end sockets of the channels, the circular holes are welded and sealed after a hydraulic test is completed, and then a pneumatic test is carried out to verify the compactness of the welding line. However, the sealing welding quality is difficult to ensure, the back surface is not well formed after welding, defects exist, cracks may be caused due to stress concentration when the equipment is used, and the risk exists.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem, a head exhaust structure of aluminium system plate-fin heat exchanger hydrostatic test has been designed.

The technical scheme of the utility model be, an aluminium system plate-fin heat exchanger hydrostatic test's head exhaust structure, including the head end plate, the top of head end plate is provided with the atmospheric joint, the blow-down pipe is installed to the front end of atmospheric joint, the stop valve is installed to the front end of blow-down pipe, the top of stop valve is provided with the manometer.

Furthermore, the head end plate is required to be selectively processed with a suitable welding groove and a suitable welding seam, and the head end plate and the emptying joint are welded together.

Furthermore, the inner side of the end plate of the end socket is flush with the bottom of the emptying joint, the end plate needs to be ground flat after welding, and 100% penetration inspection needs to be carried out on the surface of the seam.

Further, the vent pipe and the vent joint are in plug-in connection and need to be welded together by fillet welding.

Furthermore, the stop valve controls the working state of the exhaust structure, and the exhaust structure controls whether gas enters the pressure gauge.

Further, the pressure gauge can detect the air pressure in the heat exchanger in a state that the stop valve is opened.

Its beneficial effect lies in, 1 the utility model discloses an exhaust structure's principle is simple, and the preparation is convenient, can be applicable to the water pressure exhaust work of each passageway, each type head.

2. The exhaust structure is rigorous and reliable in design, can bear large pressure load at low temperature, and is small in failure risk.

3. The blow-down pipe is connected with the pressure gauge in a threaded manner and then welded with the blow-down connector, so that the test pressure in the channel during the hydrostatic test can be effectively measured, and the accuracy of the test can be verified.

4. The emptying joint can be cut off after the hydrostatic test, and the removed emptying pipe and the pressure gauge can be reused.

5. After the plug and the cut emptying connector are welded, a subsequent air pressure test can be carried out according to the standard.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a partial structural schematic diagram of the present invention;

FIG. 3 is a schematic view of the head end plate and flare fitting;

figure 4 is another schematic view of the head end plate and flare fitting.

In the figure, 1, a seal end plate; 2. an emptying joint; 3. an emptying pipe; 4. a stop valve; 5. and a pressure gauge.

Detailed Description

The utility model discloses it is right to combine the attached drawing below to describe specifically the utility model discloses, as shown in fig. 1, a head exhaust structure of aluminium system plate-fin heat exchanger hydrostatic test selects the head that needs to carry out hydrostatic test, according to the peak of aluminium system plate-fin heat exchanger horizontal state low head, and the principle of preventing equipment during operation hydrops, confirms exhaust structure's location.

According to different specifications and thicknesses of the end plate 1 of the end socket, a proper welding groove is selected and processed, and the emptying joint 2 and the end plate 1 are welded together. The bottom of the joint is flush with the inner side of the end plate 1 of the seal head, and the joint is ground flat after welding. The weld surface was checked for 100% penetration.

The vent tubes 3 are inserted into the vent fitting 2 and welded together with fillet welds. A stop valve 4 and a pressure gauge 5 are installed to the upper end of the blow pipe 3. The hydrostatic test was performed as per the standard. After the hydrostatic test, the water in the channel is drained, the emptying joint 2 is cut off at a certain distance from the end part of the sealing head, and the emptying pipe 3, the stop valve 4 and the pressure gauge 5 are removed. The top of the emptying joint 2 is machined and cut, a groove is machined, a plug is welded at last, and 100% penetration inspection is carried out on the surface of a welding line; and after the hydrostatic test is finished, drying the heat exchanger, and finally carrying out the air pressure test according to the relevant standard.

The position of the emptying joint 2 is selected at the highest point of the lower end socket of the horizontal state of the aluminum plate-fin heat exchanger, and the welding is completed before the water filling of the hydrostatic test. And the position is selected to avoid forming a liquid accumulation cavity when the heat exchanger works normally. In the case where there are multiple channels that need to be hydraulically pressurized, they should be arranged as far as possible on the same side of the heat exchanger.

The emptying joint 2 and the end enclosure are welded completely, an outer groove is adopted when the end enclosure is thin, and an X-shaped double-sided groove is adopted when the end enclosure is thick; the emptying pipe 3 is connected with the pressure gauge 5 through threads, and then is inserted into the emptying joint 2 and welded; and the emptying joint 2 is disconnected after the hydrostatic test is finished, and the components such as the meter and the like are removed. And the plug is welded with the cut emptying joint 2.

The working principle is as follows: the vent tubes 3 are inserted into the vent fitting 2 and welded together with fillet welds. A stop valve 4 and a pressure gauge 5 are installed to the upper end of the blow pipe 3. The hydrostatic test was performed as per the standard. After the hydrostatic test, the water in the channel is drained, the emptying joint 2 is cut off at a certain distance from the end part of the sealing head, and the emptying pipe 3, the stop valve 4 and the pressure gauge 5 are removed. The top of the emptying joint 2 is machined and cut, a groove is machined, a plug is welded at last, and 100% penetration inspection is carried out on the surface of a welding line; and after the hydrostatic test is finished, drying the heat exchanger, and finally carrying out the air pressure test according to the relevant standard.

Above-mentioned technical scheme has only embodied the utility model discloses technical scheme's preferred technical scheme, some changes that this technical field's technical personnel probably made to some parts wherein have all embodied the utility model discloses a principle belongs to within the protection scope of the utility model.

Claims

1. The utility model provides an aluminium system plate-fin heat exchanger hydrostatic test's head exhaust structure, including head end plate (1), its characterized in that, the top of head end plate (1) is provided with atmospheric joint (2), atmospheric pipe (3) are installed to the front end of atmospheric joint (2), stop valve (4) are installed to the front end of atmospheric pipe (3), the top of stop valve (4) is provided with manometer (5).

2. A head venting structure for a hydrostatic test of an aluminum plate-fin heat exchanger according to claim 1, wherein the head end plate (1) is welded to the blow-down joint (2).

3. An end socket exhaust structure for a hydrostatic test of an aluminum plate-fin heat exchanger as claimed in claim 1, wherein the inner side of the end socket plate (1) is flush with the bottom of the emptying joint (2), and after welding, the end socket plate needs to be ground flat, and the surface of the seam needs to be checked for 100% penetration.

4. A header exhaust structure for a hydrostatic test of an aluminum plate-fin heat exchanger according to claim 1, wherein the vent pipe (3) and the vent connector (2) are inserted and need to be welded together by fillet weld.

5. A head venting structure for a hydrostatic test of an aluminum plate-fin heat exchanger as recited in claim 1, wherein the pressure gauge (5) is capable of detecting the water pressure and the air pressure in the heat exchanger when the stop valve (4) is opened.