CN116793610B - Graphite heat exchanger air tightness detection device and method - Google Patents
Graphite heat exchanger air tightness detection device and method Download PDFInfo
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- CN116793610B CN116793610B CN202311052041.0A CN202311052041A CN116793610B CN 116793610 B CN116793610 B CN 116793610B CN 202311052041 A CN202311052041 A CN 202311052041A CN 116793610 B CN116793610 B CN 116793610B
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- 238000001514 detection method Methods 0.000 title claims abstract description 70
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 44
- 239000010439 graphite Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 8
- 230000007246 mechanism Effects 0.000 claims abstract description 22
- 238000007789 sealing Methods 0.000 claims description 56
- 238000004891 communication Methods 0.000 claims description 19
- 238000000926 separation method Methods 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 230000000712 assembly Effects 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 4
- 239000000741 silica gel Substances 0.000 claims description 4
- 229910002027 silica gel Inorganic materials 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000007770 graphite material Substances 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a graphite heat exchanger air tightness detection device and a method, which relate to the technical field of seal detection and comprise a heat exchanger body, wherein a plurality of heat exchange channels are arranged in the heat exchanger body in a penetrating way; the multi-pressure detection mechanism is arranged in the detection housing and comprises a negative pressure cover fixedly arranged in the detection housing, and the connecting pipe is connected with the negative pressure cover.
Description
Technical Field
The invention relates to the technical field of seal detection, in particular to a graphite heat exchanger air tightness detection device and method.
Background
A graphite heat exchanger is a highly efficient heat exchange device, the principle of which is to use the excellent heat conducting properties of graphite materials to transfer heat from one medium to another. The graphite heat exchanger is widely applied to industries such as chemical industry, petroleum, metallurgy, electric power and the like, and has the advantages of energy conservation, environmental protection, safety and the like.
The main components of the graphite heat exchanger are a graphite tube bundle and a shell. The graphite tube bundle is composed of a plurality of graphite tubes, the interior of each other's ink tubes is a fluid channel, and when fluid passes through each other's ink tubes, heat is transferred from high-temperature fluid to low-temperature fluid. The shell is the outer shell of the graphite tube bundle and functions to introduce and remove fluid from the graphite tube bundle while protecting the graphite tube bundle from the external environment.
The graphite heat exchanger has high heat exchange efficiency mainly due to the good heat conducting property of the graphite material. The coefficient of heat conductivity of graphite is several times of that of metal, and the coefficient of thermal expansion of graphite is small, so that it is not easy to deform, and therefore the heat transfer efficiency of graphite tube bundle is high, and its service life is long. In addition, the graphite material has the characteristics of corrosion resistance, high temperature resistance, wear resistance and the like, and can adapt to various severe working environments.
The sealing performance of the graphite heat exchanger needs to be detected before leaving the factory or after long-term use, the sealing performance of the graphite heat exchanger is detected in a vacuum pressure maintaining mode at present, the sealing performance of the graphite heat exchanger in a vacuum state can only be detected, the sealing performance of the graphite heat exchanger cannot be detected under the condition of multiple pressures, and further improvement is needed.
Disclosure of Invention
The invention provides a graphite heat exchanger air tightness detection device and method, which solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the graphite heat exchanger air tightness detection device comprises a heat exchanger body, wherein a plurality of heat exchange channels are formed in the heat exchanger body in a penetrating manner, a detection outer cover is arranged outside the heat exchanger body, connecting pipes are connected to two ends of the detection outer cover, and sealing connection assemblies are connected between the two connecting pipes and two ends of the heat exchange channels;
the detection housing is internally provided with a multi-pressure detection mechanism, the multi-pressure detection mechanism comprises a negative pressure cover fixedly arranged in the detection housing, a connecting pipe is connected with the negative pressure cover, a negative pressure pump is fixedly arranged in the detection housing, a negative pressure pipe is fixedly connected between the input end of the negative pressure pump and the negative pressure cover, and the negative pressure cover is connected with an air separation supply mechanism;
the air separation and supply mechanism comprises a plurality of fixed spherical covers arranged in the detection outer cover, fixed pipes are fixedly connected between two adjacent fixed spherical covers, a communication main pipe is fixedly connected to the side edge of the negative pressure cover, a communication branch pipe is fixedly connected between the communication main pipe and the plurality of fixed spherical covers, a sealing block is rotatably connected in each fixed spherical cover, a communication part is arranged on each sealing block, a rotating rod is rotatably connected to the detection outer cover, the rotating rod extends into the plurality of fixed spherical covers and is fixedly connected with the plurality of sealing blocks in a coaxial mode, an air inlet pipe is fixedly connected to each fixed spherical cover, and the air inlet pipe extends to the outside of the detection outer cover;
the outside of the detection outer cover is fixedly provided with a barometer, and a detection tube is fixedly arranged between the barometer and the negative pressure cover.
As a preferable technical scheme of the invention, the sealing connection assembly comprises a fixed cover fixedly arranged at the end part of the connecting pipe, one end of the fixed cover, which is far away from the connecting pipe, is fixedly connected with a sealing head, the sealing head is inserted into the heat exchange channel, and a tensioning mechanism is arranged on the connecting pipe at one side of the fixed cover.
As a preferable technical scheme of the invention, the tensioning mechanism comprises a fixed seat fixedly arranged outside the connecting pipe, a through hole is formed in the fixed seat, an elastic rope is penetrated and slidingly arranged in the through hole, and clamping blocks are fixedly connected to two ends of the elastic rope.
As a preferable technical scheme of the invention, the sealing head comprises a cannula fixedly connected with the fixed cover, the cannula is conical, and a silica gel sleeve is fixedly arranged outside the cannula.
As a preferable technical scheme of the invention, the end part of the rotating rod positioned outside the detection outer cover is coaxially and fixedly connected with the switching handle.
As a preferable technical scheme of the invention, the negative pressure pipe is fixedly provided with a control valve.
As a preferable technical scheme of the invention, a corrugated pipe is fixedly connected between the connecting pipe and the negative pressure cover.
As a preferable technical scheme of the invention, a plurality of mounting support legs are fixedly arranged at the bottom end of the detection outer cover.
A method for detecting the air tightness of a graphite heat exchanger by using an air tightness detection device of the graphite heat exchanger comprises the following steps:
s1: firstly, placing two sealing connection assemblies at two ends of a heat exchanger body, then inserting two sealing heads into two ends of the same heat exchange channel in the heat exchanger body, and clamping a clamping block at the end part of the heat exchanger body to realize sealing connection of the connecting parts of the sealing heads and the heat exchange channel;
s2: the negative pressure pump is controlled to start to suck air in the heat exchange channel, so that the heat exchange channel is in a negative pressure state, then the control valve is closed, then the switching handle is rotated to drive the sealing blocks to synchronously rotate, the switching handle is rotated for a plurality of times, the communicating parts on the sealing blocks are sequentially corresponding to the communicating branch pipes, and the numerical change of the barometer is observed, so that the air tightness of the graphite heat exchanger is observed.
The invention has the following advantages: according to the invention, the multi-pressure detection mechanism and the heat exchanger body can be in sealing connection through the sealing connection assembly, and the multi-level air pressure detection mechanism can be used for realizing multi-time air tightness detection of the graphite heat exchanger, so that the sealing performance of the graphite heat exchanger under different air pressure conditions can be obtained, the detection data are rich, and the detection accuracy is high.
Drawings
Fig. 1 is a schematic diagram of a three-dimensional structure of a graphite heat exchanger air tightness detection device.
Fig. 2 is a schematic structural diagram of a sealing connection assembly in the graphite heat exchanger air tightness detection device.
Fig. 3 is a cross-sectional view of a multi-pressure detection mechanism in a graphite heat exchanger air tightness detection device.
Fig. 4 is a schematic structural diagram of a closing block in the graphite heat exchanger air tightness detection device.
Fig. 5 is a cross-sectional view of a sealing head in a graphite heat exchanger air tightness detection device.
In the figure: 1. a heat exchanger body; 2. a heat exchange channel; 3. sealing the connection assembly; 4. a connecting pipe; 5. detecting the outer cover; 6. mounting support legs; 7. an air pressure gauge; 8. a fixed cover; 9. a sealing head; 10. a fixing seat; 11. an elastic rope; 12. a clamping block; 13. a negative pressure pump; 14. a negative pressure pipe; 15. a control valve; 16. a communicating main pipe; 17. fixing the ball cover; 18. an air inlet pipe; 19. a closing block; 20. a communicating branch pipe; 21. a fixed tube; 22. a rotating lever; 23. a switching handle; 24. a communication section; 25. a cannula; 26. a silica gel sleeve; 27. a negative pressure cover.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
It should be noted that the positional or positional relationship indicated by the terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element to be 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.
Referring to fig. 1-5, a graphite heat exchanger air tightness detection device comprises a heat exchanger body 1, wherein a plurality of heat exchange channels 2 are formed in the heat exchanger body 1 in a penetrating manner, a detection outer cover 5 is arranged outside the heat exchanger body 1, two ends of the detection outer cover 5 are connected with connecting pipes 4, and a sealing connection assembly 3 is connected between the two connecting pipes 4 and two ends of the heat exchange channels 2;
the detection housing 5 is internally provided with a multi-pressure detection mechanism, the multi-pressure detection mechanism comprises a negative pressure cover 27 fixedly arranged in the detection housing 5, the connecting pipe 4 is connected with the negative pressure cover 27, the detection housing 5 is internally fixedly provided with a negative pressure pump 13, a negative pressure pipe 14 is fixedly connected between the input end of the negative pressure pump 13 and the negative pressure cover 27, and the negative pressure cover 27 is connected with an air separation supply mechanism;
the air separation and supply mechanism comprises a plurality of fixed spherical covers 17 arranged in the detection outer cover 5, fixed pipes 21 are fixedly connected between every two adjacent fixed spherical covers 17, a communication main pipe 16 is fixedly connected to the side edge of a negative pressure cover 27, a communication branch pipe 20 is fixedly connected between the communication main pipe 16 and the plurality of fixed spherical covers 17, a sealing block 19 is rotatably connected in each fixed spherical cover 17, a communication part 24 is arranged on each sealing block 19, a rotating rod 22 is rotatably connected to the detection outer cover 5, the rotating rod 22 extends into the plurality of fixed spherical covers 17 and is fixedly connected with the plurality of sealing blocks 19 coaxially, an air inlet pipe 18 is fixedly connected to each fixed spherical cover 17, and the air inlet pipe 18 extends to the outside of the detection outer cover 5;
specifically, the communication portions 24 on the plurality of closing blocks 19 do not intersect in the circumferential direction. And the intake pipe 18 is disposed coaxially with the communication branch pipe 20.
The outside of the detection housing 5 is fixedly provided with a barometer 7, and a detection tube is fixedly arranged between the barometer 7 and the negative pressure housing 27.
The sealing connection assembly 3 comprises a fixed cover 8 fixedly arranged at the end part of the connecting pipe 4, one end, far away from the connecting pipe 4, of the fixed cover 8 is fixedly connected with a sealing head 9, the sealing head 9 is inserted into the heat exchange channel 2, and a tensioning mechanism is arranged on the connecting pipe 4 at one side of the fixed cover 8.
The tensioning mechanism comprises a fixed seat 10 fixedly arranged outside the connecting pipe 4, a through hole is formed in the fixed seat 10, an elastic rope 11 is penetrated and slidably arranged in the through hole, and clamping blocks 12 are fixedly connected to two ends of the elastic rope 11.
The sealing head 9 comprises an insertion tube 25 fixedly connected with the fixed cover 8, the insertion tube 25 is conical, and a silica gel sleeve 26 is fixedly arranged outside the insertion tube 25.
The end part of the rotating rod 22 positioned outside the detection housing 5 is coaxially and fixedly connected with a switching handle 23.
The negative pressure pipe 14 is fixedly provided with a control valve 15.
A corrugated pipe is fixedly connected between the connecting pipe 4 and the negative pressure cover 27.
The bottom end fixing of the detection housing 5 is provided with a plurality of mounting support legs 6.
A method for detecting the air tightness of a graphite heat exchanger by using an air tightness detection device of the graphite heat exchanger comprises the following steps:
s1: firstly, placing two sealing connection assemblies 3 at two ends of a heat exchanger body 1, then inserting two sealing heads 9 into two ends of the same heat exchange channel 2 in the heat exchanger body 1, and clamping a clamping block 12 at the end of the heat exchanger body 1 to realize sealing connection of the connecting parts of the sealing heads 9 and the heat exchange channel 2;
s2: the negative pressure pump 13 is controlled to start to pump out air in the heat exchange channel 2, so that the heat exchange channel 2 is in a negative pressure state, then the control valve 15 is closed, then the switching handle 23 is rotated to drive the plurality of sealing blocks 19 to synchronously rotate, the switching handle 23 is rotated for a plurality of times, the communicating parts 24 on the plurality of sealing blocks 19 are sequentially corresponding to the communicating branch pipes 20, and the numerical change of the barometer 7 is observed, so that the air tightness of the graphite heat exchanger is observed.
Specifically, because the air inlet pipe 18 is in a communication state with the outside, the air pressure in the fixed ball covers 17 is an external air pressure value, when the communication part 24 on the sealing block 19 is communicated with the communication branch pipe 20, the end part of the air inlet pipe 18 is sealed by the sealing block 19, air in the single fixed ball cover 17 enters the negative pressure cover 27, the air pressure in the heat exchange channel 2 is further increased, and after the air in the plurality of fixed ball covers 17 sequentially enters the negative pressure cover 27, the air pressure change in the heat exchange channel 2 can be observed under different air pressures, and when no external air enters the negative pressure cover 27, if the air pressure meter 7 still displays the air pressure increase, the sealing capability of the heat exchange channel 2 is insufficient.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a graphite heat exchanger gas tightness detection device, includes heat exchanger body (1), and a plurality of heat transfer passageway (2) have been seted up in the inside running through of heat exchanger body (1), a serial communication port, the outside of heat exchanger body (1) is equipped with detects dustcoat (5), and the both ends of detecting dustcoat (5) all are connected with connecting pipe (4), all are connected with sealing connection subassembly (3) between the both ends of two connecting pipes (4) and heat transfer passageway (2);
the detection housing (5) is internally provided with a multi-pressure detection mechanism, the multi-pressure detection mechanism comprises a negative pressure cover (27) fixedly arranged in the detection housing (5), the connecting pipe (4) is connected with the negative pressure cover (27), the inside of the detection housing (5) is fixedly provided with a negative pressure pump (13), a negative pressure pipe (14) is fixedly connected between the input end of the negative pressure pump (13) and the negative pressure cover (27), and the negative pressure cover (27) is connected with an air separation supply mechanism;
the air separation supply mechanism comprises a plurality of fixed spherical covers (17) arranged in a detection outer cover (5), fixed pipes (21) are fixedly connected between every two adjacent fixed spherical covers (17), a communication main pipe (16) is fixedly connected to the side edge of a negative pressure cover (27), a communication branch pipe (20) is fixedly connected between the communication main pipe (16) and the plurality of fixed spherical covers (17), a sealing block (19) is rotatably connected in each fixed spherical cover (17), a communication part (24) is arranged on each sealing block (19), a rotating rod (22) is rotatably connected to the detection outer cover (5), the rotating rod (22) extends into the plurality of fixed spherical covers (17) and is fixedly connected with the plurality of sealing blocks (19) in a coaxial mode, an air inlet pipe (18) is fixedly connected to each fixed spherical cover (17), and the air inlet pipe (18) extends to the outside the detection outer cover (5);
the outside of the detection outer cover (5) is fixedly provided with a barometer (7), and a detection tube is fixedly arranged between the barometer (7) and the negative pressure cover (27);
the sealing connection assembly (3) comprises a fixed cover (8) fixedly arranged at the end part of the connecting pipe (4), one end, far away from the connecting pipe (4), of the fixed cover (8) is fixedly connected with a sealing head (9), the sealing head (9) is inserted into the heat exchange channel (2), and a tensioning mechanism is arranged on the connecting pipe (4) at one side of the fixed cover (8);
the tensioning mechanism comprises a fixed seat (10) fixedly arranged outside the connecting pipe (4), a through hole is formed in the fixed seat (10), an elastic rope (11) is penetrated and slidingly arranged in the through hole, and clamping blocks (12) are fixedly connected to two ends of the elastic rope (11);
the end part of a rotating rod (22) positioned outside the detection housing (5) is coaxially and fixedly connected with a switching handle (23);
a control valve (15) is fixedly arranged on the negative pressure pipe (14).
2. The graphite heat exchanger air tightness detection device according to claim 1, wherein the sealing head (9) comprises a cannula (25) fixedly connected with the fixed cover (8), the cannula (25) is conical, and a silica gel sleeve (26) is fixedly arranged outside the cannula (25).
3. The graphite heat exchanger air tightness detection device according to claim 1, wherein a corrugated pipe is fixedly connected between the connecting pipe (4) and the negative pressure cover (27).
4. The graphite heat exchanger air tightness detection device according to claim 1, wherein a plurality of mounting support legs (6) are fixedly arranged at the bottom end of the detection housing (5).
5. A method for detecting the air tightness of a graphite heat exchanger by using the air tightness detection device for a graphite heat exchanger as claimed in any one of claims 1 to 4, comprising the steps of:
s1: firstly, placing two sealing connection assemblies (3) at two ends of a heat exchanger body (1), then inserting two sealing heads (9) into two ends of the same heat exchange channel (2) in the heat exchanger body (1), and clamping a clamping block (12) at the end part of the heat exchanger body (1) to realize sealing connection of the connecting parts of the sealing heads (9) and the heat exchange channel (2);
s2: the negative pressure pump (13) is controlled to start to suck air in the heat exchange channel (2), so that the heat exchange channel (2) is in a negative pressure state, then the control valve (15) is closed, then the switching handle (23) is rotated to drive the plurality of sealing blocks (19) to synchronously rotate, the switching handle (23) is rotated for a plurality of times, the communicating parts (24) on the plurality of sealing blocks (19) are sequentially corresponding to the communicating branch pipes (20), and the numerical change of the barometer (7) is observed, so that the air tightness of the graphite heat exchanger is observed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311052041.0A CN116793610B (en) | 2023-08-21 | 2023-08-21 | Graphite heat exchanger air tightness detection device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311052041.0A CN116793610B (en) | 2023-08-21 | 2023-08-21 | Graphite heat exchanger air tightness detection device and method |
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| Publication Number | Publication Date |
|---|---|
| CN116793610A CN116793610A (en) | 2023-09-22 |
| CN116793610B true CN116793610B (en) | 2023-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311052041.0A Active CN116793610B (en) | 2023-08-21 | 2023-08-21 | Graphite heat exchanger air tightness detection device and method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204718752U (en) * | 2015-07-10 | 2015-10-21 | 广州长视电子有限公司 | Negative-pressure sealing detection case |
| CN108318191A (en) * | 2018-02-27 | 2018-07-24 | 萝北奥星新材料有限公司 | A kind of suction type graphite heat exchanger detection method |
| CN111678656A (en) * | 2020-06-05 | 2020-09-18 | 哈尔滨锅炉厂有限责任公司 | Sealing detection method of multi-pass heat exchanger |
| CN116183276A (en) * | 2023-04-19 | 2023-05-30 | 江苏省特种设备安全监督检验研究院 | Round block hole type graphite heat exchanger heat exchange effect detection device |
-
2023
- 2023-08-21 CN CN202311052041.0A patent/CN116793610B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204718752U (en) * | 2015-07-10 | 2015-10-21 | 广州长视电子有限公司 | Negative-pressure sealing detection case |
| CN108318191A (en) * | 2018-02-27 | 2018-07-24 | 萝北奥星新材料有限公司 | A kind of suction type graphite heat exchanger detection method |
| CN111678656A (en) * | 2020-06-05 | 2020-09-18 | 哈尔滨锅炉厂有限责任公司 | Sealing detection method of multi-pass heat exchanger |
| CN116183276A (en) * | 2023-04-19 | 2023-05-30 | 江苏省特种设备安全监督检验研究院 | Round block hole type graphite heat exchanger heat exchange effect detection device |
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| CN116793610A (en) | 2023-09-22 |
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