CN114993846B - Device for testing pressure of heat exchanger and using method thereof - Google Patents
Device for testing pressure of heat exchanger and using method thereof Download PDFInfo
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- CN114993846B CN114993846B CN202210935735.8A CN202210935735A CN114993846B CN 114993846 B CN114993846 B CN 114993846B CN 202210935735 A CN202210935735 A CN 202210935735A CN 114993846 B CN114993846 B CN 114993846B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Details Of Heat-Exchange And Heat-Transfer (AREA)
- Examining Or Testing Airtightness (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to the technical field of pressure test of heat exchangers, and discloses a device for testing the pressure of a heat exchanger and a using method thereof, wherein the device comprises: the lower tube plate is placed below a heat exchange tube of the heat exchanger, and the heat exchange tube and the lower tube plate are vertically welded above the lower tube plate and are communicated with the lower tube plate; the pressure testing cylinder is placed below the lower tube plate and welded with the lower tube plate, a water inlet is formed in the lower portion of the outer side of the pressure testing cylinder, water enters the device through the water inlet, and a first pressure gauge is arranged in the water inlet and used for testing the water pressure in the water inlet; and a bottom surface placed below the pressure testing cylinder and welded together with the pressure testing cylinder to seal the device. According to the technical scheme, the device for pressure testing is not directly welded on the pressure-bearing cylinder, so that material waste and quality risks can be avoided, the pressure testing process of the equipment is simplified, and the manufacturing efficiency and quality of the equipment are improved.
Description
Technical Field
The invention relates to the technical field of pressure test of heat exchangers in general, in particular to a device for testing the pressure of a heat exchanger and a using method thereof.
Background
At present, with medium pipe shell side intercommunication formula fixed tube plate heat exchanger be common one type of container in the manufacturing industry, a section of pressure testing barrel is assembled and welded alone on the shell before shell (shell side barrel) assembly welding finishes to general this type of heat exchanger, carries out the pressure testing to the tube sheet according to prior art. Because the equipment size is great, the prior art not only wastes materials, and is inconvenient to operate, and the pressure testing device is directly welded on the pressure cylinder and the tube plate, and the welded part is cut off after the pressure testing is finished, so that the material waste is easily caused, the groove grinding and welding difficulty is increased, the hidden danger can be caused to the quality of the equipment, and the assembling sequence of the equipment can be influenced.
In summary, a novel pressure test method for a fixed tube plate heat exchanger communicated with a medium tube shell side needs to be researched, so that material waste and quality risks can be avoided, the pressure test process of equipment is simplified, and the manufacturing efficiency and quality of the equipment are improved.
Disclosure of Invention
In view of the above technical problem, in one aspect of the present disclosure, the present disclosure provides an apparatus for pressure testing of a heat exchanger, comprising: the lower tube plate is placed below a heat exchange tube of the heat exchanger, and the heat exchange tube and the lower tube plate are vertically welded above the lower tube plate and are communicated with the lower tube plate; the pressure testing cylinder is placed below the lower tube plate and welded with the lower tube plate, a water inlet is further formed below the outer side of the pressure testing cylinder, water enters the device through the water inlet, and a first pressure gauge is further arranged in the water inlet and used for testing the water pressure in the water inlet; and a bottom surface placed below the pressure testing cylinder and welded together with the pressure testing cylinder to seal the device.
In a preferred embodiment, the heat exchanger is a fixed tube-plate heat exchanger communicated with the shell side of the medium tube.
In another aspect of the disclosure, the disclosure presents a method of using a device for testing a heat exchanger, comprising: s1, before a filling device is installed, pressure testing is carried out on the lower tube plate and the heat exchange tube; s2, after the lower tube plate and the heat exchange tube are subjected to pressure testing, the pressure testing cylinder and the bottom surface are disassembled; s3, after the pressure test cylinder body and the bottom surface are disassembled, the filling equipment and the shell of the heat exchanger are installed; and S4, after the filling equipment and the shell of the heat exchanger are installed, performing pressure test on the heat exchanger.
In a preferred embodiment, the pressure testing cylinder has an inner diameter of 1200 mm.
In a preferred embodiment, in S1, water is injected into the pressure testing cylinder through the water inlet, the water pressure of the first pressure gauge is measured, whether the water pressure of the first pressure gauge reaches a first pressure threshold value is detected, and if the water pressure of the first pressure gauge is smaller than the first pressure threshold value, the device is reinstalled; and if the water pressure of the first pressure gauge is greater than or equal to the first pressure threshold value, completing the pressure test of the lower tube plate.
In a preferred embodiment, in S3, the packing device is welded below the lower tube sheet.
In a preferred embodiment, in S4, a second pressure gauge is provided at the tube side inlet of the heat exchanger for measuring the water pressure at the tube side inlet.
In a preferred embodiment, in S4, the heat exchanger is made horizontal, water is injected into the heat exchanger through a shell-side outlet of the heat exchanger, whether the water pressure of the second pressure gauge reaches a second pressure threshold value is detected, and if the water pressure of the second pressure gauge is smaller than the second pressure threshold value, the heat exchanger is reinstalled; and if the water pressure of the second pressure gauge is greater than or equal to the second pressure threshold value, completing the pressure test of the heat exchanger.
In a preferred embodiment, the tube-side inlet is the uppermost tube orifice of the heat exchanger when the heat exchanger is in the vertical position, and the shell-side outlet is the lowermost tube orifice of the heat exchanger when the heat exchanger is in the vertical position.
Compared with the prior art, the beneficial effects of the disclosure are: the pressure testing device is not directly welded on the pressure-bearing cylinder, so that material waste and quality risks can be avoided, the pressure testing process of the equipment is simplified, the cylinder is convenient to weld, subsequent processes and other manufacturing processes are not influenced, and the manufacturing efficiency and quality of the equipment are improved.
Drawings
The novel features of the invention are set forth with particularity in the appended claims. A better understanding of the features and advantages of the present invention will be obtained by reference to the following detailed description that sets forth illustrative embodiments, in which the principles of the invention are utilized, and the accompanying drawings. The drawings are only for purposes of illustrating embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like elements throughout, and in the drawings.
FIG. 1 shows a schematic diagram of an apparatus for pressure testing a heat exchanger, according to an exemplary embodiment of the present disclosure.
Fig. 2 shows a flow chart of a method of using a device for pressure testing a heat exchanger according to an exemplary embodiment of the present disclosure.
FIG. 3 shows a schematic view of a heat exchanger after installation is complete, according to an exemplary embodiment of the present disclosure.
Reference numerals indicate the same.
The device comprises a lower tube plate 1, a heat exchange tube 2, a pressure test barrel 3, a water inlet 4, a bottom surface 5, a tube side inlet 6, an upper barrel 7, a packing device 8, a lower barrel 9 and a shell side outlet 10.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Nothing in the following detailed description is intended to indicate that any particular component, feature, or step is essential to the invention. Those of skill in the art will understand that various features or steps may be substituted for or combined with one another without departing from the scope of the present disclosure.
FIG. 1 shows a schematic diagram of an apparatus for pressure testing a heat exchanger, according to an exemplary embodiment of the present disclosure. The present disclosure provides a device for testing pressure in a heat exchanger, comprising: a lower tube plate 1, wherein the lower tube plate 1 is placed below a heat exchange tube 2 of the heat exchanger, and the heat exchange tube 2 is welded above the lower tube plate 1 and communicated with the lower tube plate 1 vertically to the lower tube plate 1 and welded above the lower tube plate 1; the pressure testing device comprises a pressure testing barrel 3, wherein the pressure testing barrel 3 is placed below the lower tube plate 1 and welded with the lower tube plate 1, a water inlet 4 (a water inlet of the pressure testing barrel) is also arranged below the outer side of the pressure testing barrel 3, and water enters the device through the water inlet 4; and a bottom surface 5, the bottom surface 5 being placed under the pressure test cylinder 3 and welded with the pressure test cylinder 3 to seal the device. In a preferred embodiment, the heat exchanger can be a fixed tube-plate heat exchanger communicated with the shell side of the medium tube. In a preferred embodiment, a first pressure gauge is further arranged in the water inlet 4 of the pressure testing cylinder body for testing the water pressure in the water inlet 4 of the pressure testing cylinder body.
Fig. 2 shows a flow chart of a method of using a device for pressure testing a heat exchanger according to an exemplary embodiment of the present disclosure. The heat exchanger can be a fixed tube-plate heat exchanger communicated with the shell side of the medium tube. In this type of heat exchanger, the medium enters from the tube-side inlet and exits from the shell-side outlet after passing through the packing. The tube shell passes of the heat exchanger are connected by fillers and have no pressure difference, and the tube shell passes can not be independently tested by using a traditional method after the heat exchanger is manufactured. Thus, in another aspect of the disclosure, the disclosure presents a method of using a device for pressure testing a heat exchanger. The method comprises the following steps: s1, before a filler device 8 is installed, pressure testing is carried out on a lower tube plate 1 and a heat exchange tube 2, namely, a device shown in figure 1 is manufactured firstly, and then the pressure testing is carried out on the lower tube plate 1 before the filler device 8 is installed; s2, after the lower tube plate 1 and the heat exchange tubes 2 are subjected to pressure testing, disassembling the pressure testing cylinder and the bottom surface (namely the pressure testing cylinder and the bottom surface of the device for testing the pressure of the heat exchanger); s3, after the pressure test cylinder body and the bottom surface are removed, installing the packing equipment (with the packing therein) 8 and the shell of the heat exchanger; and S4, after the filling equipment and the shell of the heat exchanger are installed, carrying out pressure test on the heat exchanger. In some embodiments, the internal diameter of the pressure testing cylinder can be 500 mm to 2000 mm. The inner diameter of the pressure test cylinder may preferably be 1200 mm. In a preferred embodiment, in S1, water may be injected into the pressure test cylinder 3 through the water inlet 4 and it is detected whether the water pressure of the first pressure gauge reaches a first pressure threshold. In some embodiments, the first pressure threshold p ranges from 0.5MPa ≦ p ≦ 3.0MPa. The first pressure threshold p is preferably 1.5MPa. If the water pressure of the first pressure gauge is smaller than the first pressure threshold value, reinstalling the device; and if the water pressure of the first pressure gauge is greater than or equal to the first pressure threshold value, completing the pressure test of the lower tube plate. In a preferred embodiment, in S4, a second pressure gauge may be disposed at a tube-side inlet 6 of the heat exchanger (serving as a water outlet of the heat exchanger when performing a pressure test, which is the uppermost tube port of the heat exchanger when the heat exchanger is in a vertical state) for testing the water pressure at the tube-side inlet 6, wherein water may be injected into the heat exchanger through a shell-side outlet 10 of the heat exchanger (serving as a water inlet of the heat exchanger when performing a pressure test, which is the lowermost tube port of the heat exchanger when the heat exchanger is in a vertical state) and it is detected whether the water pressure of the second pressure gauge reaches a second pressure threshold, and in some embodiments, the second pressure threshold q is in a range of 0.5MPa or more and p or less and 2.0MPa or less. The second pressure threshold q is preferably 1MPa. If the water pressure of the second pressure gauge is smaller than the second pressure threshold value, the heat exchanger is reinstalled; and if the water pressure of the second pressure gauge is greater than or equal to the second pressure threshold value, completing the pressure test of the heat exchanger.
FIG. 3 shows a schematic view of a heat exchanger after installation is complete, according to an exemplary embodiment of the present disclosure. The heat exchanger is preferably a fixed tube-plate heat exchanger communicated with the shell side of the medium tube. This heat exchanger includes after the installation is accomplished: a tube side inlet 6, an upper cylinder 7, a heat exchange tube 2, a lower tube plate 1, a packing device 8, a lower cylinder 9 and a shell side outlet 10. The tube side inlet 6 may be located uppermost in the heat exchanger and serves as an inlet for inflow of the medium. The upper cylinder 7 may be located in the upper part of the heat exchanger and has an inner diameter smaller than that of the lower cylinder of the heat exchanger, and preferably, the inner diameter of the upper cylinder 7 is half of that of the lower cylinder 9 of the heat exchanger. The inner diameter of the upper cylinder 7 may preferably be 1200 mm. The heat exchange tubes 2 of the heat exchanger can be housed inside the upper cylinder 7. The lower tube plate 1 is placed below a heat exchange tube 2 of the heat exchanger, and the heat exchange tube 2 and the lower tube plate are vertically welded above the lower tube plate 1 and are communicated with the lower tube plate 1. A filler device 8 may be placed below the lower tube plate 1 and welded to the lower tube plate 1. At the bottom of the filling device 8, filling can be placed. The lower cylinder 9 may be located at a lower portion of the heat exchanger and has an inner diameter greater than that of the upper cylinder of the heat exchanger, and preferably, the inner diameter of the lower cylinder 9 is 2 times that of the upper cylinder 9 of the heat exchanger. In some embodiments, the lower cylinder 9 may have an inner diameter in the range of 1000 mm to 5000 mm. The inner diameter of the lower cylinder 9 may preferably be 2400 mm. The shell side outlet 10 may be located at the lowermost portion of the heat exchanger and serves as an outlet for the media to flow out. After all components of the heat exchanger are installed, the heat exchanger (e.g., the heat exchanger shown in fig. 3) may be integrally pressure tested.
By adopting the device and the method, the pressure testing device is not directly welded on the pressed barrel, so that material waste and quality risks can be avoided, the pressure testing process of the equipment is simplified, the welding of the barrel is facilitated, subsequent processes and other manufacturing processes are not influenced, and the manufacturing efficiency and quality of the equipment are improved.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the disclosure may be practiced without these specific details. In some embodiments, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
While exemplary embodiments of the present invention have been shown and described herein, it will be readily understood by those skilled in the art that such embodiments are provided by way of example only. Numerous modifications, changes and substitutions will now occur to those skilled in the art without departing from the invention. It should be understood that various alternatives to the embodiments of the invention described herein may be employed in practicing the invention. It is intended that the following claims define the scope of the invention and that methods and structures within the scope of these claims and their equivalents be covered thereby.
Claims (2)
1. A method of using a device for pressure testing a heat exchanger, the device comprising:
the lower tube plate is placed below a heat exchange tube of the heat exchanger, and the heat exchange tube and the lower tube plate are vertically welded above the lower tube plate and are communicated with the lower tube plate;
the pressure testing cylinder is placed below the lower tube plate and welded with the lower tube plate, a water inlet is formed in the lower portion of the outer side of the pressure testing cylinder, water enters the device through the water inlet, and a first pressure gauge is arranged in the water inlet and used for testing the water pressure in the water inlet; and
a bottom surface placed below the pressure testing barrel and welded together with the pressure testing barrel to seal the device;
the method is characterized by comprising the following steps:
s1, before filling equipment is installed, pressure testing is conducted on the lower tube plate and the heat exchange tube, water is injected into the pressure testing barrel through the water inlet, whether the water pressure of the first pressure gauge reaches a first pressure threshold value or not is detected, and if the water pressure of the first pressure gauge is smaller than the first pressure threshold value, the device is installed again; if the water pressure of the first pressure gauge is greater than or equal to the first pressure threshold value, the pressure test of the lower tube plate is finished;
s2, after the lower tube plate and the heat exchange tube are subjected to pressure testing, the pressure testing cylinder and the bottom surface are disassembled;
s3, after the pressure test cylinder body and the bottom surface are disassembled, installing the packing equipment and a shell of the heat exchanger, wherein the packing equipment is welded below the lower tube plate; and
s4, after the filling equipment and the shell of the heat exchanger are installed, performing pressure test on the heat exchanger, wherein a second pressure gauge is arranged at a tube side inlet of the heat exchanger and used for testing the water pressure at the tube side inlet, the heat exchanger is made to be horizontal, water is injected into the heat exchanger through a shell side outlet of the heat exchanger, whether the water pressure of the second pressure gauge reaches a second pressure threshold value or not is detected, and if the water pressure of the second pressure gauge is smaller than the second pressure threshold value, the heat exchanger is installed again; if the water pressure of the second pressure gauge is greater than or equal to the second pressure threshold value, the pressure test of the heat exchanger is completed, the tube side inlet is positioned at the uppermost tube orifice of the heat exchanger when the heat exchanger is vertical, and the shell side outlet is positioned at the lowermost tube orifice of the heat exchanger when the heat exchanger is vertical.
2. The method of claim 1, wherein the pressure test cylinder has an inner diameter of 1200 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210935735.8A CN114993846B (en) | 2022-08-05 | 2022-08-05 | Device for testing pressure of heat exchanger and using method thereof |
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| CN202210935735.8A CN114993846B (en) | 2022-08-05 | 2022-08-05 | Device for testing pressure of heat exchanger and using method thereof |
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| CN114993846B true CN114993846B (en) | 2022-10-14 |
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| CN103018156A (en) * | 2012-12-27 | 2013-04-03 | 茂名重力石化机械制造有限公司 | Testing device and testing method for shell pass side clearance seepage-proofing of heat exchange tube bundle |
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