A kind of tube and shell cooler heat exchange tube leak detection device

Abstract

A kind of tube cooler heat exchange tube leak detection device belongs to leak detection tool technical field, including plugging component and pressure charging component, pressure charging component includes plugging head, plugging head is connected with pressure relief pipe and gas pipeline by tee, plugging head is hollow structure, the inside of plugging head and pressure relief pipe, gas pipeline are communicated;Pressure relief pipe is installed with blind plate at the end away from plugging head, blind plate is detachably connected with pressure relief pipe by several bolts;Pressure gauge and valve are installed on gas pipeline.It can be used to pressurize in heat exchange tube by plugging head, and the pressure change in heat exchange tube is detected by pressure gauge, so as to judge whether heat exchange tube leaks according to pressure change, when pressure relief is needed, the split of blind plate is realized by screwing bolt, since blind plate and pressure relief pipe are gradually separated during split process, it will not suddenly release pressure, so as not to produce instantaneous impact force to cause personnel injury or impact damage of equipment parts, and the pressure relief safety is high, and the pressure relief process is simple to operate.

Description

TECHNICAL FIELD

[0001] The utility model relates to leak detection tool technical field, especially a kind of tube and shell type cooler heat exchange pipe leak detection device. BACKGROUND

[0002] Shell and tube heat exchanger is composed of shell, heat exchange tube bundle, tube sheet, baffle and other components.Two kinds of different temperature fluids flow in tube and outside tube respectively, and heat exchange is carried out through tube wall.It is simple in structure, reliable in operation, can be used at high temperature and high pressure, has strong adaptability, can handle multiple media, and is divided into fixed tube sheet type, floating head type, U-shaped tube type and other types according to structure, to meet different working condition requirements.

[0003] In industrial production process, heat exchange tube bundle may appear defects such as corrosion and cracking and leak, in order to quickly find out the leakage position, heat exchange tube bundle leak detection device (such as publication number CN219014029U) has appeared, gun head and plug are arranged, gun head box plug is blocked at both ends of heat exchange tube bundle, gun head is connected with gas source box pressure gauge, heat exchange tube bundle is pressurized by gun head, pressure change in heat exchange tube bundle is detected by pressure gauge, and whether heat exchange tube bundle leaks is judged.

[0004] The existing heat exchange tube bundle leak detection device does not involve pressure relief structure, and leak detection is completed by pulling out gun head or plug to complete pressure relief, when compressed air pressure in heat exchange tube bundle is too large, directly pulling out pressure relief is easy to cause high-speed injection of medium, and instantaneous impact force is easy to cause injury of personnel or impact damage of equipment parts. UTILITY MODEL CONTENTS

[0005] To solve the technical problems in the above background art that the existing heat exchange tube bundle leak detection device does not involve pressure relief structure, and directly pulling out pressure relief can cause high-speed injection of medium, which is easy to cause injury of personnel or impact damage of equipment parts, the utility model provides a tube and shell type cooler heat exchange pipe leak detection device.

[0006] The utility model technical scheme is as follows:

[0007] This utility model provides a leak detection device for heat exchange tubes in a shell-and-tube cooler. It includes a sealing assembly for sealing one end of the heat exchange tube and a pressurizing assembly for sealing the other end. The pressurizing assembly includes a sealing head connected to a pressure relief pipe and a gas supply pipe via a tee. The sealing head is hollow, and its interior is connected to both the pressure relief pipe and the gas supply pipe. A blind flange is installed at the end of the pressure relief pipe furthest from the sealing head, and the blind flange is detachably connected to the pressure relief pipe by several bolts. A pressure gauge and a valve are installed on the gas supply pipe. The sealing head can be used to pressurize the heat exchange tube, and the pressure gauge can be used to detect pressure changes within the heat exchange tube. Based on these pressure changes, it can be determined whether the heat exchange tube is leaking. When pressure relief is required, the blind flange can be disassembled by tightening the bolts. Because the blind flange and pressure relief pipe separate gradually during disassembly, there is no sudden pressure release, thus preventing instantaneous impact that could cause injury to personnel or damage to equipment components. The pressure relief is highly safe and the operation is simple.

[0008] Preferably, a flange is fixed at the end of the pressure relief pipe away from the sealing head. The blind flange is connected to the flange by bolts. The blind flange and the flange are separated by tightening the bolts. Since the blind flange and the flange are gradually separated during the separation process, there will be no sudden pressure relief. There will be no instantaneous impact force that could cause injury to personnel or impact damage to equipment parts. The pressure relief is safe and the pressure relief process is simple to operate.

[0009] Preferably, the sealing head has a tapered tube structure, which facilitates the insertion and use of the sealing head.

[0010] Preferably, the plug, pressure relief pipe and gas transmission line are all threaded to the tee. The corresponding model of plug can be selected according to the size of the heat exchange tube and installed on the tee. It has strong adaptability, does not require multiple sets of equipment, and reduces the cost of use.

[0011] Preferably, the end of the gas pipeline away from the tee is fixedly provided with a gas source interface for connecting the gas pipeline to the gas source.

[0012] Preferably, the valve is located on the side of the pressure gauge away from the plug, thus avoiding any impact on the operation of the pressure gauge after the valve is closed.

[0013] Preferably, the sealing assembly includes a rotating rod, which is a screw structure. One end of the rotating rod is fixedly equipped with a compression plate. An expansion sealing unit and a handheld limiting unit are sleeved on the rotating rod. The rotating rod and the handheld limiting unit are threadedly connected. The expansion sealing unit is located between the compression plate and the handheld limiting unit. The handheld limiting unit makes it easy for the operator to hold the sealing assembly. The operator can hold the limiting unit with one hand and rotate the rotating rod with the other hand to change the compression position, so that the compression plate moves toward the direction closer to the handheld limiting unit to compress the expansion sealing unit, causing the expansion sealing unit to expand and block the opening of the heat exchange tube.

[0014] Preferably, the expansion sealing unit is an expansion sealing ring, which can deform and expand under compression to meet the sealing requirements of heat exchange tubes of different diameters.

[0015] Preferably, a handle is fixed at the end of the rotating rod away from the extrusion plate, which makes it easy for the operator to hold and rotate the rotating rod, thus facilitating the application of force.

[0016] Preferably, the handheld limiting unit includes a limiting plate, which facilitates the compression of the expansion sealing unit in conjunction with the extrusion plate, and can also abut against the opening of the heat exchange tube to limit the sealing component and facilitate the rotation of the rotating rod. A handheld part is fixedly provided on the side of the limiting plate away from the expansion sealing unit. The handheld part is a hollow columnar structure with internal threads inside to facilitate hand operation by the operator.

[0017] As can be seen from the above technical solutions, the advantages of this utility model are:

[0018] 1. The heat exchange tube can be pressurized using the plug head, and the pressure change inside the heat exchange tube can be detected using a pressure gauge. The pressure change can be used to determine whether the heat exchange tube is leaking. When pressure needs to be released, the blind plate can be disassembled by turning the bolts. Since the blind plate and the pressure relief pipe are gradually separated during the disassembly process, there will be no sudden pressure release, so there will be no instantaneous impact force that could cause injury to personnel or impact damage to equipment parts. The pressure relief is highly safe and the pressure relief process is simple to operate.

[0019] 2. A pressing plate is fixedly installed at one end of the rotating rod. An expansion sealing unit and a hand-held limiting unit are fitted on the rotating rod. The rotating rod is threadedly connected to the hand-held limiting unit. The expansion sealing unit is located between the pressing plate and the hand-held limiting unit. The hand-held limiting unit makes it easy for the operator to hold the sealing component. The operator can hold the limiting unit with one hand and rotate the rotating rod with the other hand to change the pressing position, so that the pressing plate moves toward the hand-held limiting unit to press the expansion sealing unit, causing the expansion sealing unit to expand and block the opening of the heat exchange tube. Attached Figure Description

[0020] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Fig. 1 This is a schematic diagram of the pressurization assembly according to one or more embodiments of the present invention;

[0022] Fig. 2 This is a schematic diagram of the sealing assembly according to one or more embodiments of the present invention;

[0023] The components represented by the various reference numerals in the diagram are:

[0024] 1. Sealing head; 2. Tee; 3. Pressure relief pipe; 4. Gas pipeline; 5. Pressure gauge; 6. Gas source interface; 7. Flange; 8. Blind flange; 9. Rotary rod; 10. Extrusion plate; 11. Expansion sealing unit; 12. Handheld limiting unit; 121. Limiting plate; 122. Handheld part; 13. Handle; 14. Valve; 15. Bolt. Detailed Implementation

[0025] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0026] Example 1

[0027] In a typical embodiment of this utility model, such as Figs. 1-2 As shown, a leak detection device for heat exchange tubes in a shell-and-tube cooler is proposed, comprising: a pressurizing component and a sealing component. The pressurizing component and the sealing component are used to fill the two ends of the heat exchange tube to be tested. The pressurizing component serves to seal the end of the heat exchange tube and pressurize the heat exchange tube, while the sealing component serves to seal the other end of the heat exchange tube.

[0028] like Fig. 1 As shown, the pressurization assembly includes a plug head 1, a tee 2, a pressure relief pipe 3, a gas supply line 4, a pressure gauge 5, a flange 7, and a blind flange 8. The plug head 1 is connected to the pressure relief pipe 3 and the gas supply line 4 through the tee 2. The plug head 1 is used to seal the end of the heat exchange tube. The plug head 1 has a hollow structure, and its interior is connected to the pressure relief pipe 3 and the gas supply line 4. The gas supply line 4 is used to connect to a high-pressure gas source. The gas supply line 4 is also connected to the pressure gauge 5. In actual operation, the plug head 1 can be used to pressurize the heat exchange tube, and the pressure gauge 5 can be used to detect the pressure change inside the heat exchange tube, thereby judging whether the heat exchange tube is leaking based on the pressure change.

[0029] The pressure relief pipe 3 is a steel pipe structure. A flange 7 is provided at the end of the pressure relief pipe 3 away from the sealing head 1. The flange 7 is fixed to the pressure relief pipe 3 by welding. The flange 7 is detachably connected to the blind plate 8 by several bolts 15. Thus, when pressure relief is required, the blind plate 8 and the flange 7 can be separated by tightening the bolts 15. Since the blind plate 8 and the flange 7 are gradually separated during the separation process, there will be no sudden pressure relief, and no instantaneous impact force will be generated to cause injury to personnel or impact damage to equipment parts. The pressure relief safety is high, and the pressure relief process is simple to operate. In addition, the setting of the pressure relief pipe 3 means that the gas transmission pipeline 4 does not need to be set with other branch pipelines and branch pipeline valves for pressure relief, simplifying the structure.

[0030] The gas supply line 4 is a flexible hose. In this embodiment, the pressure gauge 5 is connected to the gas supply line 4. It is understood that in other embodiments, the pressure gauge 5 can also be connected to the pressure relief pipe 3. The specific configuration can be made according to actual needs, and no further restrictions are imposed here.

[0031] The plug head 1 is made of metal and has a tapered tube structure, which facilitates the insertion of the plug head 1. The maximum outer diameter of the plug head 1 is not less than the inner diameter of the heat exchange tube, and the surface roughness of the plug head 1 is Ra1.6 to ensure that the inner wall of the heat exchange tube and the outer wall of the plug head 1 have sufficient friction, as well as secure installation and sealing.

[0032] In other embodiments, to further improve the sealing performance, a rubber layer can be fixedly provided on the outer wall of the plug head 1 to further increase the friction between the heat exchange tube and the plug head 1, thereby improving the installation firmness and sealing ability.

[0033] The plug head 1, pressure relief pipe 3 and gas transmission line 4 are all connected to the tee 2 by threaded connection. In actual use, the plug head 1 has several models. The corresponding model of plug head can be selected according to the size of the heat exchange tube and installed on the tee 2. It has strong adaptability and does not require multiple sets of equipment, thus reducing the cost of use.

[0034] The gas pipeline 4 is fixedly equipped with a gas source interface 6 at one end for connecting to the gas source. The gas source interface 6 is a quick-release structure for quick connection to the gas source. A valve 14 is also installed on the gas pipeline 4 to control the opening and closing of the gas pipeline 4. The valve 14 is located on the side of the pressure gauge 5 away from the sealing head 1 to avoid affecting the operation of the pressure gauge 5 after the valve 14 is closed.

[0035] like Fig. 2As shown, the sealing assembly includes a rotating rod 9, a pressing plate 10, an expansion sealing unit 11, and a handheld limiting unit 12. The rotating rod 9 is a screw structure with external threads. The pressing plate 10 is fixedly installed at one end of the rotating rod 9 by welding. The expansion sealing unit 11 is sleeved on the rotating rod 9 and located on one side of the pressing plate 10. The handheld limiting unit 12 is sleeved on the rotating rod 9 and is threadedly connected to the rotating rod 9. The expansion sealing unit 11 is located between the pressing plate 10 and the handheld limiting unit 12. The handheld limiting unit 12 facilitates the operator's handholding of the sealing assembly. The operator can hold the limiting unit 12 with one hand and rotate the rotating rod 9 with the other hand to change the position of the pressing plate 10, causing the pressing plate 10 to move towards the handheld limiting unit 12 to compress the expansion sealing unit 11, causing the expansion sealing unit 11 to expand and block the opening of the heat exchange tube.

[0036] In this embodiment, the expansion sealing unit 11 is an expansion sealing ring, which can deform and expand under compression to adapt to the sealing requirements of heat exchange tubes of different diameters.

[0037] To facilitate the rotation of the rotating rod 9, a handle 13 is fixed at the end of the rotating rod 9 away from the extrusion plate 10, so that the operator can hold and rotate the rotating rod 9 to facilitate the application of force.

[0038] The handheld limiting unit 12 is close to the handle 13. The handheld limiting unit 12 includes a limiting plate 121 and a handheld part 122. The limiting plate 121 has a plate-like structure, which facilitates the cooperation with the extrusion plate 10 to extrude the expansion sealing unit 11. On the other hand, it can also abut against the opening of the heat exchange tube to limit the sealing component and facilitate the force application and rotation of the rotating rod 9. The handheld part 122 is fixedly installed on the limiting plate 121 by welding or other means, and the handheld part 122 is located on the side of the limiting plate 121 away from the expansion sealing unit 11. The handheld part 122 has a hollow columnar structure and internal threads are provided inside the handheld part 122 to cooperate with the rotating rod 9 through threaded connection.

[0039] The specific working principle is as follows:

[0040] Insert the plugging head 1 into one end of the heat exchange tube bundle to be tested for sealing, and connect the gas source interface 6 to the gas source; then insert the plugging assembly into the other end of the heat exchange tube bundle to be tested. The operator holds the handle 122 with one hand and rotates the rotating rod 9 with the other hand to use the extrusion plate 10 to squeeze and expand the expansion sealing unit 11 to seal the tube opening.

[0041] After the pipe openings at both ends of the heat exchange tube bundle are sealed, open valve 14 and start the gas source to pressurize the heat exchange tube bundle under test. After pressurization is completed, close valve 14 and observe the change in the pointer of pressure gauge 5. If the pressure decreases, the heat exchange tube bundle is leaking; if the pressure does not change, the heat exchange tube bundle is not leaking.

[0042] After the test is completed, remove the bolts 15 between the blind flange 8 and the flange 7, and the gas will be discharged outward through the pressure relief pipe 3 to complete the pressure relief work.

[0043] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A leak detection device for heat exchange tubes of a shell-and-tube cooler, comprising: A sealing assembly for sealing one end of a heat exchange tube is characterized in that it further includes: a pressurizing assembly for sealing the other end of the heat exchange tube, the pressurizing assembly including a sealing head (1), the sealing head (1) being connected to a pressure relief pipe (3) and a gas transmission line (4) via a tee (2), the sealing head (1) being a hollow structure, the interior of the sealing head (1) being connected to the pressure relief pipe (3) and the gas transmission line (4); a blind plate (8) is installed at the end of the pressure relief pipe (3) away from the sealing head (1), the blind plate (8) being detachably connected to the pressure relief pipe (3) via several bolts (15); a pressure gauge (5) and a valve (14) are installed on the gas transmission line (4).

2. The leak detection device for heat exchange tubes of a shell-and-tube cooler according to claim 1, characterized in that, The pressure relief pipe (3) is fixed with a flange (7) at the end away from the sealing head (1), and the blind plate (8) is connected to the flange (7) by bolts (15).

3. The leak detection device for heat exchange tubes of a shell-and-tube cooler according to claim 1, characterized in that, The sealing head (1) has a tapered tube structure.

4. The leak detection device for heat exchange tubes of a shell-and-tube cooler according to claim 1, characterized in that, The plug (1), pressure relief pipe (3) and gas pipeline (4) are all threadedly connected to the tee (2).

5. The leak detection device for heat exchange tubes of a shell-and-tube cooler according to claim 1, characterized in that, The gas pipeline (4) is fixedly equipped with a gas source interface (6) at the end away from the tee (2).

6. The leak detection device for heat exchange tubes of a shell-and-tube cooler according to claim 1, characterized in that, The valve (14) is located on the side of the pressure gauge (5) away from the plug (1).

7. The leak detection device for heat exchange tubes of a shell-and-tube cooler according to claim 1, characterized in that, The sealing assembly includes a rotating rod (9), which is a screw structure. One end of the rotating rod (9) is fixedly provided with a compression plate (10). An expansion sealing unit (11) and a hand-held limiting unit (12) are sleeved on the rotating rod (9). The rotating rod (9) is threadedly connected to the hand-held limiting unit (12). The expansion sealing unit (11) is located between the compression plate (10) and the hand-held limiting unit (12).

8. The leak detection device for heat exchange tubes of a shell-and-tube cooler according to claim 7, characterized in that, The expansion sealing unit (11) is an expansion sealing ring.

9. The leak detection device for heat exchange tubes of a shell-and-tube cooler according to claim 7, characterized in that, A handle (13) is fixedly provided at the end of the rotating rod (9) away from the extrusion plate (10).

10. The leak detection device for heat exchange tubes of a shell-and-tube cooler according to claim 7, characterized in that, The handheld limiting unit (12) includes a limiting plate (121). A handheld part (122) is fixedly provided on the side of the limiting plate (121) away from the expansion sealing unit (11). The handheld part (122) is a hollow columnar structure and has internal threads inside.

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