CN219161571U

CN219161571U - Snakelike heat exchange tube pressure test structure

Info

Publication number: CN219161571U
Application number: CN202320318713.7U
Authority: CN
Inventors: 谢玉超; 邹妮康
Original assignee: Zhanghuaji Suzhou Heavy Equipment Co ltd
Current assignee: Zhanghuaji Suzhou Heavy Equipment Co ltd
Priority date: 2023-02-27
Filing date: 2023-02-27
Publication date: 2023-06-09
Anticipated expiration: 2033-02-27

Abstract

The utility model relates to a serpentine heat exchange tube pressure test structure, which comprises: the utility model provides a heat exchange tube that first tube sheet, second tube sheet and a plurality of are serpentine heat exchange tube that same row set up, the pipe hole intussuseption of first tube sheet is filled with first end cap, and the pipe hole intussuseption of second tube sheet is filled with second end cap, in first end cap and the second end cap both, one is closed end cap, is equipped with the inlet channel in the other, the inlet of inlet channel links to each other with the helium source, the export of inlet channel link up in serpentine heat exchange tube, first tube sheet department installs the first frock that compresses tightly that is used for compressing tightly first end cap, second tube sheet department installs the second frock that compresses tightly that is used for compressing tightly the second end cap, first frock that compresses tightly with the second compresses tightly frock structure the same, all include: at least two support frames and baffle, the support frame includes: two backup pads, adjusting bolt and weld the nut between two backup pads to pressure testing efficiency has been improved greatly.

Description

Snakelike heat exchange tube pressure test structure

[ field of technology ]

The utility model relates to the field of chemical machinery, in particular to a serpentine heat exchange tube pressure test structure.

[ background Art ]

The heat exchanger is an energy-saving device for realizing heat transfer between two or more fluids with different temperatures, and is one of main devices for transferring heat from a fluid with a higher temperature to a fluid with a lower temperature, so that the temperature of the fluid reaches the index specified by a flow, thereby meeting the requirements of process conditions and improving the utilization rate of energy. The heat exchanger generally comprises a barrel, a tube plate and a heat exchange tube, wherein the serpentine heat exchange tube heat exchanger is one of the heat exchangers, please refer to Chinese patent No. 201821041894.9, the structure of the serpentine heat exchange tube heat exchanger is disclosed, the tube heads of the serpentine heat exchange tube are welded with the tube plate, deep hole welding is generally adopted in the industry, namely, a boss is arranged at the tube hole of the tube plate in an outward protruding way, the tube heads of the serpentine heat exchange tube are welded with the boss, and the deep hole welding has the advantages that: 1. the problem of residual stress generated by tube expansion is solved; 2. the problem of clearance corrosion does not exist between the heat exchange tube and the tube plate tube hole; the 3 pipe joint is a butt welding seam, and the bearing capacity is higher. The defects of deep hole welding are that: has higher requirements on processing precision and welding process and is difficult to repair.

The production process of the common snakelike heat exchange tube in the prior art comprises the following steps: the method comprises the steps of firstly welding one serpentine heat exchange tube with a tube plate, carrying out radial detection on the welded part of the tube head through a shooting machine after welding is finished to check whether leakage exists or not, timely repairing if leakage exists, then welding the other serpentine heat exchange tube with the tube plate, and then detecting whether leakage exists or not, wherein the detection one by one is carried out by adopting one welding, the number of the heat exchange tubes is numerous and the arrangement is compact, if all the heat exchange tubes are welded and then detected, once the leakage of one heat exchange tube is found to need repairing, the periphery of the heat exchange tube is a dense hemp heat exchange tube, no space is needed for repairing at all, the repairing difficulty of deep hole welding is high, and the space requirement on the periphery of the repairing part is also high.

Therefore, it is necessary to provide a serpentine heat exchange tube pressure test structure for solving the above technical problems.

[ utility model ]

In order to solve the above problems, the present utility model aims to provide a serpentine heat exchange tube pressure test structure capable of improving production efficiency.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: a serpentine heat exchange tube pressure test structure comprising: the heat exchange tube comprises a first tube plate, a second tube plate and a plurality of snake-shaped heat exchange tubes arranged in the same row, wherein one end tube head of each snake-shaped heat exchange tube is welded with the first tube plate, the other end tube head of each snake-shaped heat exchange tube is welded with the second tube plate, a first plug is plugged in a tube hole of the first tube plate, a second plug is plugged in a tube hole of the second tube plate, one of the first plug and the second plug is a closed plug, an air inlet channel is arranged in the other one, an inlet of the air inlet channel is connected with a helium source, an outlet of the air inlet channel is communicated with the inside of each snake-shaped heat exchange tube, a first compression tool used for compressing the first plug is installed at the first tube plate, a second compression tool used for compressing the second plug is installed at the second tube plate, and the first compression tool and the second compression tool are identical in structure and all comprise: at least two support frames and support the baffle in the support frame, the support frame includes: the two support plates are arranged in parallel, and the nut is welded between the two support plates and the adjusting bolt is matched with the nut.

Preferably, a serpentine heat exchange tube pressure test structure in the present utility model is further provided with: the supporting plate comprises a vertical arm, a top arm and a bottom arm, wherein the vertical arm is perpendicular to the top arm and the bottom arm respectively, and hook parts are arranged at the free tail ends of the top arm and the bottom arm.

Preferably, a serpentine heat exchange tube pressure test structure in the present utility model is further provided with: a first sealing ring is arranged between the first plug and the pore wall of the pore of the first tube plate.

Preferably, a serpentine heat exchange tube pressure test structure in the present utility model is further provided with: the first plug is provided with a first accommodating groove for accommodating the first sealing ring.

Preferably, a serpentine heat exchange tube pressure test structure in the present utility model is further provided with: and a second sealing ring is arranged between the second plug and the pore wall of the pore of the second tube plate.

Preferably, a serpentine heat exchange tube pressure test structure in the present utility model is further provided with: and a second accommodating groove for accommodating the second sealing ring is formed in the second plug.

Preferably, a serpentine heat exchange tube pressure test structure in the present utility model is further provided with: the baffle of the first compaction tool is abutted against the end face of the first plug.

Preferably, a serpentine heat exchange tube pressure test structure in the present utility model is further provided with: and the baffle plate of the second compaction tool is abutted against the end face of the second plug.

Compared with the prior art, the utility model has the following beneficial effects: the serpentine heat exchange tube pressure test structure is simple in structure and convenient to install, the heat exchange tubes can be tested in a row-by-row mode through the structure, working efficiency is greatly improved, manufacturing period is shortened, and in addition, the plug can be prevented from sliding out due to pressure in the pressure test process through the compression tool.

[ description of the drawings ]

FIG. 1 is a schematic diagram of a serpentine heat exchange tube pressure test structure according to the present utility model.

Fig. 2 is a schematic structural diagram of a first plug according to the present utility model.

Fig. 3 is a schematic structural diagram of a second plug according to the present utility model.

In fig. 1 to 3: 1. the first tube plate, 2, the second tube plate, 3, the snakelike heat exchange tube, 4, first end cap, 40, first accommodating groove, 41, air inlet channel, 5, second end cap, 50, second accommodating groove, 6, first compaction fixture, 60, support frame, 600, support plate, 6000, vertical arm, 6001, top arm, 6002, bottom arm, 6003, hook portion, 601, nut, 602, adjusting bolt, 61, baffle, 7, second compaction fixture.

[ detailed description ] of the utility model

The pressure test structure of the serpentine heat exchange tube is described in further detail below by means of specific embodiments.

Referring to fig. 1 to 3, a serpentine heat exchange tube pressure test structure includes: the first tube plate 1, the second tube plate 2 and a plurality of serpentine heat exchange tubes 3 arranged in the same row, in this embodiment, six serpentine heat exchange tubes 3 are arranged in a row. One end tube head of the snake-shaped heat exchange tube 3 is welded with the first tube plate 1, the other end tube head of the snake-shaped heat exchange tube 3 is welded with the second tube plate 2, a first plug 4 is plugged in a tube hole of the first tube plate 1, a first sealing ring (not shown) is arranged between the first plug 4 and the tube hole wall of the first tube plate 1, and a first accommodating groove 40 for accommodating the first sealing ring is formed in the first plug 4. A second plug 5 is plugged in the pipe hole of the second pipe plate 2, a second sealing ring (not shown) is arranged between the second plug 5 and the pipe hole wall of the second pipe plate 2, and a second accommodating groove 50 for accommodating the second sealing ring is formed in the second plug 5.

The first end cap 4 is provided with an air inlet channel 41, an inlet of the air inlet channel 41 is connected with a helium source, an outlet of the air inlet channel 41 is communicated with the inside of the serpentine heat exchange tube 3, the second end cap 5 is a closed end cap, a first pressing tool 6 for pressing the first end cap 4 is installed at the first tube plate 1, a second pressing tool 7 for pressing the second end cap 5 is installed at the second tube plate 2, and the first pressing tool 6 comprises: at least two support frames 60 and support in the baffle 61 in the support frame 60, the support frame 60 includes: two support plates 600 arranged in parallel, a nut 601 welded between the two support plates 600, and an adjusting bolt 602 matched with the nut 601. The backup pad 600 includes perpendicular arm 6000, top arm 6001 and end arm 6002, perpendicular arm 6000 is perpendicular setting with top arm 6001 and end arm 6002 respectively, the free end of top arm 6001 and end arm 6002 all is equipped with colludes portion 6003, and support frame 60 is sheathe in from one side of first tube sheet 1 during the installation, and its collude portion 6003 hooks first tube sheet 1 after the installation is accomplished, then places baffle 61 on support frame 60 again, then twists adjusting bolt 602 and promotes baffle 61 and compress tightly first end cap 4, compresses tightly the back baffle 61 of first compression frock 6 and the terminal surface looks butt of first end cap 4. The structure of the second pressing tool 7 is the same as that of the first pressing tool 6, and thus a repetitive description will not be made.

During pressure test, helium is simultaneously introduced into the row of the plurality of serpentine heat exchange tubes 3 through the air inlet channels 41 of the row of the plurality of first plugs 4, then the helium is raised to a test pressure value, then the helium mass spectrometer is used for detecting, if leakage exists, the helium mass spectrometer can give out prompt tones, and an maintainer overhauls the leakage part in time.

In summary, the serpentine heat exchange tube pressure test structure is simple in structure and convenient to install, the heat exchange tubes can be tested in a row-by-row mode through the structure, the working efficiency is greatly improved, the manufacturing period is shortened, and in addition, the plug can be prevented from sliding out due to pressure in the pressure test process through the arrangement of the compression tool.

The above-described embodiments are merely illustrative of the principles and functions of the present utility model, and some of the practical examples, not intended to limit the utility model; it should be noted that modifications and improvements can be made by those skilled in the art without departing from the inventive concept, and these are all within the scope of the present utility model.

Claims

1. A snakelike heat exchange tube pressure test structure which characterized in that: comprising the following steps: the heat exchange tube comprises a first tube plate, a second tube plate and a plurality of snake-shaped heat exchange tubes arranged in the same row, wherein one end tube head of each snake-shaped heat exchange tube is welded with the first tube plate, the other end tube head of each snake-shaped heat exchange tube is welded with the second tube plate, a first plug is plugged in a tube hole of the first tube plate, a second plug is plugged in a tube hole of the second tube plate, one of the first plug and the second plug is a closed plug, an air inlet channel is arranged in the other one, an inlet of the air inlet channel is connected with a helium source, an outlet of the air inlet channel is communicated with the inside of each snake-shaped heat exchange tube, a first compression tool used for compressing the first plug is installed at the first tube plate, a second compression tool used for compressing the second plug is installed at the second tube plate, and the first compression tool and the second compression tool are identical in structure and all comprise: at least two support frames and support the baffle in the support frame, the support frame includes: the two support plates are arranged in parallel, and the nut is welded between the two support plates and the adjusting bolt is matched with the nut.

2. A serpentine heat exchange tube pressure test structure as set forth in claim 1, wherein: the supporting plate comprises a vertical arm, a top arm and a bottom arm, wherein the vertical arm is perpendicular to the top arm and the bottom arm respectively, and hook parts are arranged at the free tail ends of the top arm and the bottom arm.

3. A serpentine heat exchange tube pressure test structure as set forth in claim 1, wherein: a first sealing ring is arranged between the first plug and the pore wall of the pore of the first tube plate.

4. A serpentine heat exchange tube pressure test structure as set forth in claim 3, wherein: the first plug is provided with a first accommodating groove for accommodating the first sealing ring.

5. A serpentine heat exchange tube pressure test structure as set forth in claim 1, wherein: and a second sealing ring is arranged between the second plug and the pore wall of the pore of the second tube plate.

6. The serpentine heat exchange tube pressure test structure as set forth in claim 5, wherein: and a second accommodating groove for accommodating the second sealing ring is formed in the second plug.

7. A serpentine heat exchange tube pressure test structure as set forth in claim 1, wherein: the baffle of the first compaction tool is abutted against the end face of the first plug.

8. A serpentine heat exchange tube pressure test structure as set forth in claim 1, wherein: and the baffle plate of the second compaction tool is abutted against the end face of the second plug.