CN211784113U - Leakage detection device for detecting leakage of heat exchange tube - Google Patents
Leakage detection device for detecting leakage of heat exchange tube Download PDFInfo
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- CN211784113U CN211784113U CN202020089263.5U CN202020089263U CN211784113U CN 211784113 U CN211784113 U CN 211784113U CN 202020089263 U CN202020089263 U CN 202020089263U CN 211784113 U CN211784113 U CN 211784113U
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- heat exchange
- exchange tube
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- clamping piece
- leak detection
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Abstract
The utility model discloses a leak hunting device for heat exchange tube leak hunting, the leak hunting device of this application scheme is all installed at the both ends of heat exchange tube, a leak hunting device is used for sealed heat exchange tube, another leak hunting device is used for the input atmospheric pressure to detect, the heat exchange tube is connected to in-connection portion, be equivalent to heat exchange tube itself as the atress fulcrum, further set up outer connecting portion based on above-mentioned fulcrum, this leak hunting device both can install in the heat exchange tube, can regard as transition connection spare again, the leak hunting process of each heat exchange tube this moment is relatively independent, need not to also can keep stable relation of connection with the help of other fulcrums or support. This utility model is used for the heat exchanger field.
Description
Technical Field
The utility model relates to a heat exchanger field especially relates to a leak hunting device for heat exchange tube leak hunting.
Background
The development trend of the existing heat exchanger is large, efficient and compact, the heat exchange area is large, the length of the heat exchange tube is long, but the development trend is limited by the manufacturing capability of a heat exchanger manufacturer, and a plurality of heat exchange tubes are often required to be spliced. The method is applied to heat exchange tube butt joints in high-pressure occasions, toxic media, flammable and explosive media or severe working conditions, helium mass spectrum leakage detection is often required besides ray or ultrasonic detection, and a vacuum or pressure environment is required to be formed in the tubes of the heat exchange tubes.
The prior art mainly has two types, one is to adopt a mode of welding a plug or an adapter at the end part of a heat exchange tube, as shown in figure 1; secondly, the expansion gun is extended into the end part of the heat exchange tube, and then the expansion gun and the end part of the heat exchange tube are extruded and sealed through hydraulic pressure, as shown in figure 2. According to the first prior art, a plug or an adapter is welded at the end part of a heat exchange tube, length allowance is reserved for the heat exchange tube, the plug and a small amount of heat exchange tubes are cut off after helium mass spectrum leak detection is finished, a weld heat affected zone at the end part of the heat exchange tube is removed completely, and then the heat exchange tube is finally processed, so that on one hand, the length of the heat exchange tube needs to be reserved with allowance, the length is wasted, and the cost is increased; on the other hand, the method relates to welding, cutting, processing and nondestructive testing, has more procedures, low efficiency and unfavorable recycling, and the nondestructive testing and welding also relate to the requirement and management of personnel qualification. The second prior art relates to the rifle that expands, and the cost of the rifle that expands is high, and if the heat exchange tube pipe diameter is little, the expansion link diameter is little, and the purchase is difficult, does not have corresponding specification even.
In practical operation, the helium mass spectrometer leak detection is performed after the heat exchange tubes are butt welded, and the following four-point requirements exist on the end sealing structure of the heat exchange tubes:
one heat exchanger is often provided with a plurality of heat exchange tubes, and the sealing structure at the end part of each heat exchange tube is required to be reusable and convenient to disassemble and assemble;
the design of the ultra-long heat exchange tube also relates to the welding of the reducing tube, and the sealing structure at the end part of the heat exchange tube is required to be suitable for various tube diameters;
if a heat exchange tube manufacturer does not have helium mass spectrum leakage detection qualification, a heat exchanger manufacturer is involved to carry helium mass spectrum leakage detection equipment and a heat exchange tube end sealing tool to meet the requirement of the heat exchange tube manufacturer for performing mass spectrum leakage detection, and the heat exchange tube end sealing structure is convenient to carry;
the sealing structure at the end part of the heat exchange tube is convenient to connect with helium leakage detection equipment.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a satisfy a leak hunting device for heat exchange tube leak hunting of one of above-mentioned four-point demand at least.
The utility model adopts the technical proposal that:
a leakage detection device for detecting leakage of a heat exchange tube is sleeved on the heat exchange tube and comprises an inner connecting part, a first groove hole and a second groove hole, wherein the inner connecting part is detachably fixed on the heat exchange tube and is provided with a first groove hole allowing the heat exchange tube to penetrate through; the outer connecting part is detachably fixed on the inner connecting part and is provided with a second slotted hole allowing the heat exchange tube to pass through, and the first slotted hole and the second slotted hole are coaxial; the threaded head is arranged on one side, far away from the inner connecting part, of the outer connecting part, the threaded head is coaxial with the second slotted hole, and the inner diameter of the threaded head is larger than the outer diameter of the heat exchange tube to be accommodated.
Because the connection can be dismantled in the interior connecting portion adoption, so the leak hunting device can use repeatedly, and the specification that the while leak hunting device can be according to the size of the heat exchange tube variation in size can be used for the reducing pipe even.
As an improvement of the scheme, a plug used for sealing or an adapter used for connecting helium mass spectrometer leak detection equipment is connected to the threaded head.
As the improvement of above-mentioned scheme, inner connecting portion include clamping piece and lower clamping piece, go up the clamping piece with for dismantling the connection between the clamping piece down, go up the clamping piece with the surface between the clamping piece down is equipped with sunken arc slot that is used for accomodating the heat exchange tube, prescribes a limit to first slotted hole between two arc slots. When the upper clamping piece and the lower clamping piece are connected with each other, the two arc-shaped grooves respectively clamp the upper side and the lower side of the heat exchange tube.
As an improvement of the above scheme, the outer connecting portion includes a first vertical plate and a second vertical plate, the left side of the first vertical plate is connected with the upper clamping piece or the lower clamping piece, the right side of the first vertical plate is connected with the second vertical plate, through holes are arranged between the first vertical plate and the second vertical plate, a second slot is defined by the two through holes, and the screw head is installed on the second vertical plate. The heat exchange tube is introduced as a reference, and then the heat exchange tube is vertical to the first vertical plate and the second vertical plate.
As an improvement of the scheme, the upper clamping piece and the lower clamping piece are connected through a bolt group.
As an improvement of the scheme, the first vertical plate and the upper clamping piece or the lower clamping piece are fixedly welded, and the first vertical plate and the second vertical plate are connected through a bolt group.
As an improvement of the scheme, rubber pads are arranged on the surfaces of the two arc-shaped grooves and the inner wall of the second vertical plate.
A method of using the leak detection apparatus described above, comprising the steps of: preparing two leak hunting devices and a heat exchange tube, two leak hunting devices are located the front and back both ends of heat exchange tube respectively, and in-connection portion installs on the heat exchange tube, and in-connection portion is connected to outer connecting portion, and the one end of heat exchange tube has passed first slotted hole, second slotted hole and screw thread head this moment, one install the end cap on the screw thread head, another the overhead installation of screw thread is used for connecting the adapter of helium mass spectrum leak hunting equipment, and the adapter is connected helium mass spectrum leak hunting equipment and is obtained atmospheric pressure.
Has the advantages that: the inner connecting part is connected with the heat exchange tube, the heat exchange tube is taken as a stress fulcrum, the outer connecting part is further arranged on the basis of the fulcrum, the leakage detection device can be installed on the heat exchange tube and can be taken as a transition connecting piece, the leakage detection process of each heat exchange tube is relatively independent at the moment, and the stable connection relation can be kept without the help of other fulcrums or supports.
Drawings
The present invention will be further explained with reference to the accompanying drawings:
FIG. 1 is a schematic view of a welding plug of a heat exchange tube according to a conventional embodiment;
FIG. 2 is a schematic view of a heat exchange tube of a conventional embodiment inserted into an expansion gun;
FIG. 3 is a schematic view of the heat exchange tube of the present embodiment in combination with two leak detection devices;
fig. 4 is an exploded view of the heat exchange tube of the present embodiment in combination with an inner connection part;
fig. 5 is an exploded view of the heat exchange tube of the present embodiment in combination with the inner connection portion and the outer connection portion;
FIG. 6 is an enlarged view of the heat exchange tube of the present embodiment in combination with a leak detection apparatus;
fig. 7 is a sectional view of the heat exchange tube of the present embodiment in combination with a leak detection apparatus.
Detailed Description
In the description of the present invention, it should be understood that the orientation or positional relationship indicated, for example, up, down, front, rear, left, right, etc., referred to the orientation description is the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of the description of the present invention, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of meanings are one or more, a plurality of meanings are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms above, below, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution in the present invention.
Referring to fig. 1 to 7, the utility model relates to a leak hunting device and application method for heat exchange tube leak hunting.
The leak detection device is sleeved on the heat exchange tube 10, and as shown in fig. 3, the leak detection devices of the scheme of the application are arranged at two ends of the heat exchange tube 10, one leak detection device is used for sealing the heat exchange tube 10, and the other leak detection device is used for inputting air pressure to detect. The leak detection device comprises an inner connecting part and an outer connecting part, wherein the inner connecting part is detachably fixed on the heat exchange tube 10, and the outer connecting part is detachably fixed on the heat exchange tube 10. The inner connecting part and the outer connecting part are respectively provided with a first slotted hole and a second slotted hole which are coaxial. The outer connecting part is provided with a threaded head 40, the outer wall of the threaded head 40 is provided with threads, and the threaded head is used for connecting a sealed plug or an adapter 50 for connecting helium mass spectrometer leak detection equipment. The heat exchange pipe 10 passes through the inner connection portion and the outer connection portion at the same time in use.
The inner connection part is connected to the heat exchange pipe 10 to form a new fulcrum, and the outer connection part is installed on the basis. The scheme of the application creatively takes the heat exchange tube 10 as a fulcrum, and on the basis, a plug or an adapter 50 is independently arranged. The leakage detection device is convenient to install and flexible to use. Because the connection can be dismantled in the internal connection portion adoption, so the leak hunting device can use repeatedly, and the specification that the size is different can be designed according to the size of heat exchange tube 10 to the leak hunting device simultaneously, can be used for the reducing pipe even.
The inner connection comprises an upper clamping piece 21 and a lower clamping piece 22, the upper clamping piece 21 and the lower clamping piece 22 are detachably connected, a sunken arc-shaped groove for accommodating the heat exchange tube 10 is formed in the surface between the upper clamping piece 21 and the lower clamping piece 22, and a first slotted hole is defined between the two arc-shaped grooves. When the upper jaw 21 and the lower jaw 22 are coupled to each other, the two arc-shaped grooves clamp upper and lower sides of the heat exchange pipe 10, respectively.
As shown in fig. 4, in order to increase the connection area with the heat exchange tube 10, the upper jaw 21 and the lower jaw 22 are each extended appropriately in the axial direction of the heat exchange tube 10. The lower clamping piece 22 is thicker than the upper clamping piece 21, and the upper clamping piece 21 is a sheet material, and the upper clamping piece 21 bends along the change of the trend of the arc-shaped groove. In this embodiment, the left and right ends of the upper clip 21 and the lower clip 22 are connected and fixed by a bolt assembly, in other embodiments, the single sides of the upper clip 21 and the lower clip 22 are hinged to each other, and in a lift-open manner, the other sides of the upper clip 21 and the lower clip 22 may be connected by a lock catch or a latch.
Preferably, in order to avoid abrasion of the heat exchange pipe 10, the upper jaw 21 and the lower jaw 22 are provided with rubber pads 60 on the arc-shaped grooves.
The outer connecting portion comprises a first vertical plate 31 and a second vertical plate 32, the left side of the first vertical plate 31 is connected with the upper clamping plate 21 or the lower clamping plate 22, the right side of the first vertical plate 31 is connected with the second vertical plate 32, a through hole is formed in the middle of the first vertical plate 31 and the second vertical plate 32, a second slotted hole is defined by the two through holes, and the thread head 40 is installed on the second vertical plate 32. The heat exchange pipe 10 is introduced as a reference, and the heat exchange pipe 10 is perpendicular to the first vertical plate 31 and the second vertical plate 32. In this embodiment, the front surface of the first vertical plate 31 is U-shaped, and a gap opened upward is formed in the middle, and the heat exchange tube 10 may pass through the gap.
As shown in fig. 5, considering that the lower clip 22 has a sufficient thickness, the first vertical plate 31 is welded to the lower clip 22, and the first vertical plate 31 and the second vertical plate 32 are fixed by a bolt set. It can be seen that the thickness of the second standing plate 32 is much greater than that of the first standing plate 31, because the perforation of the second standing plate 32 plays a main role in wrapping the heat exchange tube 10. As can be seen in fig. 5, the through hole of the second vertical plate 32 is a stepped hole, and the large diameter end of the stepped hole is close to the first vertical plate 31, and a rubber pad 60 is also arranged at the position for wrapping the heat exchange tube 10; the small diameter end of the stepped hole is in clearance fit with the heat exchange tube 10. The rubber pad here is circular.
As shown in fig. 6 and 7, the adapter 50 is mounted on the screw head 40, and a gasket 51 is disposed between the adapter 50 and the heat exchange tube 10 to prevent the heat exchange tube 10 from directly abutting against the inner wall of the adapter 50. Typically, the adapter 50 is welded to the second riser 32.
The use method of the leak detection device comprises the following steps: preparing two leak hunting devices and a heat exchange tube 10, two leak hunting devices are located the front and back both ends of heat exchange tube 10 respectively, and interior connecting portion install on heat exchange tube 10, and interior connecting portion are connected to outer connecting portion, and the one end of heat exchange tube 10 has passed first slotted hole, second slotted hole and screw thread head 40 this moment, one install the end cap on the screw thread head 40, another install the adapter 50 that is used for connecting helium mass spectrum leak hunting equipment on the screw thread head 40, adapter 50 connects helium mass spectrum leak hunting equipment and obtains atmospheric pressure.
Of course, the design creation is not limited to the above embodiments, and the combination of different features of the above embodiments can also achieve good effects. Those skilled in the art can make equivalent changes or substitutions without departing from the spirit of the present invention, and such equivalent changes or substitutions are included in the scope defined by the claims of the present application.
Claims (7)
1. The utility model provides a leak hunting device for heat exchange tube leak hunting which characterized in that: is sleeved on the heat exchange tube and comprises
The inner connecting part is detachably fixed on the heat exchange tube and is provided with a first slotted hole for allowing the heat exchange tube to pass through;
the outer connecting part is detachably fixed on the inner connecting part and is provided with a second slotted hole allowing the heat exchange tube to pass through, and the first slotted hole and the second slotted hole are coaxial;
the threaded head is arranged on one side, far away from the inner connecting part, of the outer connecting part, the threaded head is coaxial with the second slotted hole, and the inner diameter of the threaded head is larger than the outer diameter of the heat exchange tube to be accommodated.
2. The leak detection apparatus for leak detection of a heat exchange tube according to claim 1, wherein: and the threaded head is connected with a plug for sealing or an adapter for connecting helium mass spectrometer leak detection equipment.
3. The leak detection apparatus for leak detection of a heat exchange tube according to claim 2, characterized in that: the in-connection portion includes clamping piece and lower clamping piece, go up the clamping piece with for dismantling the connection between the clamping piece down, go up the clamping piece with the surface between the clamping piece is equipped with sunken arc slot that is used for accomodating the heat exchange tube down, prescribes a limit to first slotted hole between two arc slots.
4. Leak detection apparatus for leak detection of a heat exchange tube according to claim 3, characterized in that: the outer connecting portion comprises a first vertical plate and a second vertical plate, the left side of the first vertical plate is connected with the upper clamping piece or the lower clamping piece, the right side of the first vertical plate is connected with the second vertical plate, through holes are formed in the middles of the first vertical plate and the second vertical plate, a second slotted hole is defined by the two through holes, and the threaded head is installed on the second vertical plate.
5. The leak detection apparatus for leak detection of a heat exchange tube according to claim 4, wherein: the upper clamping piece is connected with the lower clamping piece through a bolt set.
6. The leak detection apparatus for leak detection of a heat exchange tube according to claim 5, wherein: the first vertical plate and the upper clamping piece or the lower clamping piece are fixedly welded, and the first vertical plate and the second vertical plate are connected through a bolt set.
7. The leak detection apparatus for leak detection of a heat exchange tube according to claim 6, wherein: rubber pads are arranged on the surfaces of the two arc-shaped grooves and the inner wall of the second vertical plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020089263.5U CN211784113U (en) | 2020-01-15 | 2020-01-15 | Leakage detection device for detecting leakage of heat exchange tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020089263.5U CN211784113U (en) | 2020-01-15 | 2020-01-15 | Leakage detection device for detecting leakage of heat exchange tube |
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| Publication Number | Publication Date |
|---|---|
| CN211784113U true CN211784113U (en) | 2020-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020089263.5U Active CN211784113U (en) | 2020-01-15 | 2020-01-15 | Leakage detection device for detecting leakage of heat exchange tube |
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|---|---|
| CN (1) | CN211784113U (en) |
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2020
- 2020-01-15 CN CN202020089263.5U patent/CN211784113U/en active Active
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