CN117647368B - Heat exchanger air tightness detection device and method thereof - Google Patents
Heat exchanger air tightness detection device and method thereof Download PDFInfo
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- CN117647368B CN117647368B CN202410121219.0A CN202410121219A CN117647368B CN 117647368 B CN117647368 B CN 117647368B CN 202410121219 A CN202410121219 A CN 202410121219A CN 117647368 B CN117647368 B CN 117647368B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
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- 210000004907 gland Anatomy 0.000 description 3
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
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Abstract
The invention relates to the technical field of heat exchanger detection, and discloses a heat exchanger air tightness detection device and a method thereof, which solve the problems that in the existing detection mode, a heat exchanger product is mostly put into water to observe bubbles so as to obtain a conclusion of whether the heat exchanger leaks or not, and the heat exchanger is required to be dried in the later stage; the heat exchanger does not need to be put into water, and further, the heat exchanger does not need to be dried in the later stage, so that the heat exchanger is convenient to detect.
Description
Technical Field
The invention belongs to the technical field of heat exchanger detection, and particularly relates to a heat exchanger air tightness detection device and a heat exchanger air tightness detection method.
Background
The heat exchanger absorbs heat through the heat absorbing sheet to transfer heat to the copper pipe to heat water in the copper pipe. Welding treatment is often adopted at the joint of the current heat exchanger products to achieve the effects of connection and sealing. Then in the welding process, the problem of missing sealing performance is unavoidable, if the product quality and the delivery time are affected by not detecting, the existing detection mode mostly puts the heat exchanger product into water to observe bubbles so as to obtain the conclusion of whether the heat exchanger leaks air or not, and the heat exchanger needs to be dried in the later stage, so that certain limitations exist.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the invention provides the heat exchanger air tightness detection device and the method thereof, which effectively solve the problems that in the prior art, most of the existing detection modes in the prior art, heat exchanger products are put into water to observe bubbles so as to obtain a conclusion of whether the heat exchanger leaks air or not, and the heat exchanger is required to be dried in the later stage.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a heat exchanger gas tightness detection device, including base and test bench, the test bench sets up in the top of base, be equipped with on the base with test bench matched with station adjustment structure, fixedly connected with air pump on the base, the output fixedly connected with connecting pipe of air pump, the outside fixed cover of connecting pipe is equipped with first support, and first support and base fixed connection, it has a plurality of first fixed pipes to run through on the test bench, and first fixed pipe and test bench fixed connection, the top of first fixed pipe is equipped with the connector that is used for connecting the heat exchanger air inlet, connector and first fixed pipe pass through hose connection, the outside cover of first fixed pipe is equipped with the movable shell that is located test bench below, movable shell and test bench pass through the stretcher connection, be equipped with the sealing cap on the movable shell respectively with connecting pipe and first fixed pipe matched with sealing unit, the top of test bench is equipped with the sealing cap, the sealing cap is bottom open-ended cavity structure, be equipped with the casting die with the movable shell matched with on the sealing cap, sealing cap and base pass through elevating unit and be connected, be equipped with the second fixed pipe in the sealing cap, the outside cover of second fixed pipe is equipped with the piston ring, the outside cover of second fixed pipe is equipped with piston ring, the outside seal cap is equipped with the piston ring, the outside fixed cover of second fixed pipe is equipped with the piston ring is equipped with the connector, the inner wall of second fixed pipe and the piston, the inner wall of second fixed pipe is connected with the sealing cap, the top fixed pipe is contacted with the second fixed disk, the piston, the top fixed sealing sleeve is equipped with the piston, and inner sealing sleeve is equipped with the sealing cap, and sealing cap is equipped with sealing cap, and sealing cover is equipped with sealing cover with bottom opening, the sealing cover is provided with an elastic reset detection assembly matched with the piston disc, and is provided with an air compression adjusting structure matched with the piston ring.
Preferably, the air compression adjustment structure comprises a first guide post and a screw rod which are fixedly installed at the top of the piston ring, the first guide post and the screw rod respectively penetrate through the sealing cover, a thread bush is sleeved on the top rotation of the sealing cover, the top end of the screw rod is located in the thread bush, and the thread bush is connected with the sealing cover through a rotation adjuster.
Preferably, the rotary adjuster comprises a first damping disk fixedly mounted at the top of the threaded sleeve, a second damping disk is arranged at the top of the first damping disk, the second damping disk is in contact with the first damping disk, a first motor is arranged above the second damping disk, a protecting shell is sleeved outside the first motor, the bottom of the protecting shell is fixedly connected with the top of the sealing cover, the first motor is connected with the protecting shell through a first hydraulic telescopic rod, the output end of the first motor is fixedly connected with a turntable, a plurality of second guide posts are fixedly connected at the top of the second damping disk, a guide sleeve is sleeved outside the second guide posts, the top end of the guide sleeve is fixedly connected with the turntable, a first compression spring is sleeved outside the guide sleeve, and two ends of the first compression spring are respectively fixedly connected with the second damping disk and the turntable.
Preferably, the elastic reset detection assembly comprises a prism fixedly mounted at the top of the piston disc, a second compression spring and a second support are sleeved outside the prism, the bottom of the second support is fixedly connected with the top of the sealing cover, two ends of the second compression spring are respectively fixedly connected with the second support and the piston disc, and a detection unit matched with the prism is arranged on the second support.
Preferably, the detection unit comprises a ranging sensor arranged above the prism, the second bracket is fixedly connected with a first fixing frame, and the ranging sensor is fixedly arranged on the first fixing frame.
Preferably, the lower pressing piece comprises a first supporting part fixedly mounted on the movable shell, a second fixing frame matched with the first supporting part is fixedly connected to the sealing cover, the lifting unit comprises a supporting frame fixedly mounted on the sealing cover, the supporting frame is connected with the base through a second hydraulic telescopic rod, and a first sealing ring is fixedly connected to the bottom of the sealing cover.
Preferably, the sealing unit comprises a supporting ring arranged in the movable shell, the supporting ring is fixedly sleeved outside the first fixed pipe, a second sealing ring is arranged at the top of the supporting ring, the second sealing ring is fixedly connected with the inner wall of the movable shell, and a third sealing ring matched with the connecting pipe is fixedly connected to the inner wall of the movable shell.
Preferably, the stretcher comprises at least two second supporting parts fixedly mounted on the movable shell, a third guide column penetrates through the second supporting parts, the top end of the third guide column is fixedly connected with the bottom of the detection table, an extension spring is sleeved outside the third guide column, and two ends of the extension spring are fixedly connected with the detection table and the second supporting parts respectively.
Preferably, the station adjusting structure comprises a rotating shaft fixedly mounted at the bottom of the detection table, the bottom end of the rotating shaft is connected with the top of the base through a bearing, a first gear is sleeved on the outer fixed sleeve of the rotating shaft, a second motor is fixedly connected to the base, the output end of the second motor is fixedly connected with a second gear, the second gear is meshed with the first gear, a plurality of support columns are fixedly connected to the bottom of the detection table, rollers are fixedly connected to the bottom ends of the support columns, and the rollers are contacted with the top of the base.
The invention also provides a heat exchanger air tightness detection method, which uses the heat exchanger air tightness detection device, and comprises the following steps:
step one: connecting an air inlet end of the heat exchanger with the connector, blocking an air outlet end of the heat exchanger by using a sealing plug, and driving the detection table to rotate through a station adjusting structure after the heat exchanger is connected, so that the connected heat exchanger rotates to a detection station, and meanwhile, the connected heat exchanger is positioned below the sealing cover, and a movable shell positioned on the detection station moves to the upper part of the connecting pipe;
step two: the lifting unit drives the sealing cover to move downwards, the connected heat exchanger is sealed between the sealing cover and the detection table, the sealing cover drives the movable shell to move downwards through the pressing piece, so that the top end of the connecting pipe is inserted into the movable shell, and the connecting pipe is communicated with a first fixed pipe positioned on the detection station through the movable shell;
step three: the piston ring is driven to move downwards through the air compression adjusting structure, the piston ring compresses air in the sealing cover, the air in the sealing cover is compressed along with the increase of the thrust exerted by the air in the sealing cover on the piston disc, when the thrust exerted by the air in the sealing cover on the piston disc is larger than the resistance born by the movement of the piston disc, the air pushes the piston disc to move upwards, at the moment, the air compression adjusting structure stops driving the piston ring to move downwards, the volume of the air in the sealing cover is increased due to the upward movement of the piston disc, the thrust exerted by the air in the sealing cover on the piston disc is reduced, when the thrust exerted by the air in the sealing cover on the piston disc is consistent with the resistance exerted by the air in the sealing cover on the piston disc, the piston disc stops moving again, at the moment, the piston disc is at a critical point, the position of the piston disc is detected through the elastic reset detection assembly, and the correction of the initial position of the piston disc is completed;
step four: starting the air pump, the air pump injects air into the heat exchanger through the connecting pipe, the movable shell, the first fixed pipe, the hose and the connector, when the heat exchanger leaks air, the air enters into the sealing cover through the gap, the thrust exerted by the air in the sealing cover on the piston disc is increased, the piston disc can be moved upwards again, and when the elastic reset detection assembly detects the upward movement of the piston disc, the air leakage of the heat exchanger can be known.
Compared with the prior art, the invention has the beneficial effects that:
the air pump injects the air into the heat exchanger, when the heat exchanger leaks gas, the air enters into the sealed cowling through the gap in, the thrust that the air in the sealed cowling applys the piston dish increases, can make the piston dish reciprocate again, when elasticity reset detection subassembly detects the piston dish and reciprocate, can learn the heat exchanger gas leakage, when the heat exchanger does not leak gas, the air can not enter into the sealed cowling through the heat exchanger in, the height of piston dish remains unchanged, can learn the heat exchanger does not leak gas, need not put into the heat exchanger in the water, and then need not dry the heat exchanger in the later stage, conveniently detect the heat exchanger.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention.
In the drawings:
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of a test table according to the present invention;
FIG. 3 is an enlarged partial schematic view of the present invention at A in FIG. 2;
FIG. 4 is a schematic view of the movable housing of the present invention in cross-section;
FIG. 5 is a schematic view of a seal housing of the present invention in cross-section;
FIG. 6 is a schematic view of a second stationary tube of the present invention in cross-section;
FIG. 7 is a schematic view showing the construction of the second guide post and guide sleeve of the present invention disassembled;
fig. 8 is a schematic view of the structure of the invention with the thread bush and the screw rod detached.
In the figure: 1. a base; 2. a detection table; 3. an air pump; 4. a connecting pipe; 5. a first bracket; 6. a movable case; 7. a first fixed tube; 8. a sealing cover; 9. a second fixed tube; 10. piston rings; 11. a piston disc; 12. a support ring; 13. a first gland; 14. a second gland; 15. a third gland; 16. a first guide post; 17. a screw rod; 18. a thread sleeve; 19. a first damping disk; 20. a second damping disk; 21. a turntable; 22. a second guide post; 23. a guide sleeve; 24. a first compression spring; 25. a first motor; 26. a protective shell; 27. a first hydraulic telescoping rod; 28. a prism; 29. a second bracket; 30. a second compression spring; 31. a first fixing frame; 32. a ranging sensor; 33. the second fixing frame; 34. a first support portion; 35. a second hydraulic telescoping rod; 36. a support frame; 37. a first seal ring; 38. a backing ring; 39. a second seal ring; 40. a third seal ring; 41. a third guide post; 42. a second supporting part; 43. a tension spring; 44. a connector; 45. a hose; 46. a rotating shaft; 47. a first gear; 48. a second motor; 49. a second gear; 50. a support column; 51. and a roller.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention; all other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The first embodiment, as shown in fig. 1 to 8, the invention comprises a base 1 and a detection table 2, the detection table 2 is arranged above the base 1, a station adjusting structure matched with the detection table 2 is arranged on the base 1, an air pump 3 is fixedly connected on the base 1, the output end of the air pump 3 is fixedly connected with a connecting pipe 4, a first bracket 5 is fixedly sleeved outside the connecting pipe 4, the first bracket 5 is fixedly connected with the base 1, a plurality of first fixed pipes 7 penetrate through the detection table 2, the first fixed pipes 7 are fixedly connected with the detection table 2, a connector 44 for connecting the air inlet end of a heat exchanger is arranged above the first fixed pipes 7, the connector 44 is connected with the first fixed pipes 7 through a hose 45, a movable shell 6 positioned below the detection table 2 is sleeved outside the first fixed pipes 7, the movable shell 6 is connected with the detection table 2 through a stretcher, the movable shell 6 is provided with a sealing unit which is respectively matched with the connecting pipe 4 and the first fixed pipe 7, the top of the detection table 2 is provided with a sealing cover 8, the sealing cover 8 is of a cavity structure with an opening at the bottom end, the sealing cover 8 is provided with a pressing piece which is matched with the movable shell 6, the sealing cover 8 is connected with the base 1 through a lifting unit, the sealing cover 8 is internally provided with a second fixed pipe 9, the outer part of the second fixed pipe 9 is sleeved with a piston ring 10, the outer part of the piston ring 10 is fixedly sleeved with a first sealing sleeve 13, the outer part of the second fixed pipe 9 is sleeved with a second sealing sleeve 14, the second sealing sleeve 14 is fixedly connected with the piston ring 10, the first sealing sleeve 13 is contacted with the inner wall of the sealing cover 8, the top end of the second fixed pipe 9 penetrates through the sealing cover 8, the second fixed pipe 9 is fixedly connected with the sealing cover 8, the second fixed pipe 9 is internally provided with a piston disc 11, the bottom of the piston disc 11 is provided with a supporting ring 12, the support ring 12 is fixedly connected with the inner wall of the second fixed pipe 9, a third sealing sleeve 15 is fixedly sleeved outside the piston disc 11, the third sealing sleeve 15 is contacted with the inner wall of the second fixed pipe 9, an elastic reset detection assembly matched with the piston disc 11 is arranged on the sealing cover 8, and an air compression adjusting structure matched with the piston ring 10 is arranged on the sealing cover 8; the air pump 3 injects the air into the heat exchanger, when the heat exchanger leaks gas, the air enters into sealed cowling 8 through the gap in, the thrust that the air in the sealed cowling 8 applys to piston disc 11 increases, can make piston disc 11 reciprocate again, when elasticity reset detection subassembly detects piston disc 11 and reciprocate, can learn the heat exchanger gas leakage, when the heat exchanger does not leak gas, the air can not enter into in the sealed cowling 8 through the heat exchanger, the height of piston disc 11 remains unchanged, can learn the heat exchanger does not leak gas, need not put into the heat exchanger in the aquatic, and then need not later stage dry the heat exchanger, the convenience detects the heat exchanger.
Based on the first embodiment, the air compression adjusting structure is provided by fig. 1, fig. 2, fig. 5, fig. 7 and fig. 8, and comprises a first guide post 16 and a screw rod 17 which are fixedly installed at the top of a piston ring 10, wherein the first guide post 16 and the screw rod 17 respectively penetrate through a sealing cover 8, a threaded sleeve 18 is rotatably sleeved at the top of the sealing cover 8, the top end of the screw rod 17 is positioned in the threaded sleeve 18, the threaded sleeve 18 and the sealing cover 8 are connected through a rotary adjuster, the rotary adjuster comprises a first damping disc 19 fixedly installed at the top of the threaded sleeve 18, a second damping disc 20 is arranged at the top of the first damping disc 19, the second damping disc 20 is in contact with the first damping disc 19, a first motor 25 is arranged above the second damping disc 20, a protecting shell 26 is sleeved outside the first motor 25, the protecting shell 26 is fixedly connected with the top of the sealing cover 8, the first motor 25 is fixedly connected with a protecting shell 27 through a first hydraulic telescopic rod, the output end of the first motor 25 is fixedly connected with a rotary disc 21, the top of the second damping disc 20 is fixedly connected with a plurality of guide posts 22 and the two ends of the second guide posts 23 are fixedly connected with the first guide posts 23, and the two ends of the first guide posts 23 are fixedly connected with the first guide posts 21 and the two ends of the first damping disc 23, and the first guide post 23 are fixedly connected with the first guide post 23;
the turntable 21 is driven to rotate by the first motor 25, the turntable 21 drives the second damping disk 20 to rotate by the guide sleeve 23 and the second guide post 22, the second damping disk 20 drives the first damping disk 19 and the threaded sleeve 18 to rotate by friction force, the threaded sleeve 18 drives the screw rod 17, the piston ring 10 and the first guide post 16 to move downwards, the piston ring 10 compresses air in the sealing cover 8, the air in the sealing cover 8 is compressed along with the increase of the thrust exerted by the air in the sealing cover 8 on the piston disk 11, when the thrust exerted by the air in the sealing cover 8 on the piston disk 11 is greater than the resistance exerted by the movement of the piston disk 11, the air pushes the piston disk 11 to move upwards, at the moment, the resistance of the downward movement of the piston ring 10 reaches a preset value, the second damping disk 20 cannot drive the first damping disk 19 and the threaded sleeve 18 to rotate by friction force, the first hydraulic telescopic rod 27 can enable the piston ring 10 to be automatically stopped after being lowered to a preset position, the distance between the first motor 25 and the second damping disk 20 is changed, the first hydraulic telescopic rod 25 is changed, the distance between the first hydraulic telescopic rod 21 and the first damping disk 20 is changed, the first damping disk is automatically stopped when the first hydraulic telescopic rod 24 is changed, the first damping disk 20 is automatically stopped, the first damping disk is deformed, the first damping disk 20 is automatically stopped, and the first damping disk is deformed, and the first damping disk is moved, and the first damping disk 20 is automatically, and the first damping disk is automatically stopped, and the first damping rod is moved, and the first motor is automatically, and the first motor is moved and the speed is 20 is automatically, and the speed is automatically moved.
In the third embodiment, as shown in fig. 5 and 6, the elastic reset detection assembly includes a prism 28 fixedly installed on the top of the piston disc 11, a second compression spring 30 and a second support 29 are sleeved outside the prism 28, the bottom of the second support 29 is fixedly connected with the top of the sealing cover 8, two ends of the second compression spring 30 are respectively fixedly connected with the second support 29 and the piston disc 11, a detection unit matched with the prism 28 is arranged on the second support 29, the detection unit includes a ranging sensor 32 arranged above the prism 28, a first fixing frame 31 is fixedly connected on the second support 29, and the ranging sensor 32 is fixedly installed on the first fixing frame 31;
when the piston disc 11 moves upwards, the piston disc 11 drives the prism 28 to move upwards relative to the second bracket 29, the second compression spring 30 is in a compressed state, the distance between the distance measuring sensor 32 and the prism 28 can be measured by the distance measuring sensor 32, the change amount of the vertical height of the piston disc 11 can be further known, after the heat exchanger is detected, the lifting unit drives the sealing cover 8 to move upwards, air in the sealing cover 8 can flow with outside air mutually, at the moment, the second compression spring 30 drives the piston disc 11 to move downwards, the piston disc 11 is contacted with the top of the supporting ring 12 again, and the piston disc 11 is reset to the initial position.
In the fourth embodiment, based on the first embodiment, as shown in fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, the pressing piece includes a first supporting part 34 fixedly installed on the movable shell 6, a second fixing frame 33 matched with the first supporting part 34 is fixedly connected on the sealing cover 8, the lifting unit includes a supporting frame 36 fixedly installed on the sealing cover 8, the supporting frame 36 is connected with the base 1 through a second hydraulic telescopic rod 35, a first sealing ring 37 is fixedly connected with the bottom of the sealing cover 8, the sealing unit includes a supporting ring 38 arranged in the movable shell 6, the supporting ring 38 is fixedly sleeved outside the first fixing tube 7, a second sealing ring 39 is arranged at the top of the supporting ring 38, the second sealing ring 39 is fixedly connected with the inner wall of the movable shell 6, a third sealing ring 40 matched with the connecting tube 4 is fixedly connected on the inner wall of the movable shell 6, the stretcher comprises at least two second supporting parts 42 fixedly arranged on the movable shell 6, a third guide post 41 penetrates through the second supporting parts 42, the top end of the third guide post 41 is fixedly connected with the bottom of the detection table 2, an extension spring 43 is sleeved outside the third guide post 41, two ends of the extension spring 43 are respectively fixedly connected with the detection table 2 and the second supporting parts 42, the station adjusting structure comprises a rotating shaft 46 fixedly arranged at the bottom of the detection table 2, the bottom end of the rotating shaft 46 is connected with the top of the base 1 through a bearing, a first gear 47 is fixedly sleeved outside the rotating shaft 46, a second motor 48 is fixedly connected on the base 1, the output end of the second motor 48 is fixedly connected with a second gear 49, the second gear 49 is meshed with the first gear 47, the bottom of the detection table 2 is fixedly connected with a plurality of support columns 50, the bottom ends of the support columns 50 are fixedly connected with rollers 51, the roller 51 contacts the top of the base 1;
when the support frame 36 and the seal cover 8 are driven to move downwards through the second hydraulic telescopic rod 35, the seal cover 8 drives the second fixing frame 33 to move downwards, after the second fixing frame 33 contacts with the first supporting part 34, the first supporting part 34 drives the movable shell 6 to move downwards along with the continuous downward movement of the seal cover 8 and the second fixing frame 33, the top end of the connecting pipe 4 is gradually inserted into the movable shell 6 along with the continuous downward movement of the first supporting part 34, the second sealing ring 39 moves towards the supporting ring 38, the second supporting part 42 slides relative to the third guide post 41, the tension spring 43 is in a tension state, when the seal cover 8 descends to the lowest position, the first sealing ring 37 at the bottom of the seal cover 8 and the top of the detection table 2 are increased by the design of the first sealing ring 37, the sealing performance of the joint of the seal cover 8 and the detection table 2 is improved, the bottom of the second sealing ring 39 is tightly attached to the top of the supporting ring 38, and the top end of the connecting tube 4 is tightly attached to the bottom of the third sealing ring 40, the tightness of the connection part between the movable shell 6 and the connecting tube 4 and the first fixed tube 7 is increased by the design of the second sealing ring 39 and the third sealing ring 40, when the second fixing frame 33 does not press the first supporting part 34 any more, the second supporting part 42 is driven by the extension spring 43 to move upwards relative to the first fixed tube 7, the movable shell 6 and the first supporting part 34 are driven by the second supporting part 42 to move upwards relative to the first fixed tube 7 to the initial position, the connecting tube 4 can be separated from the movable shell 6, the second gear 49 is driven by the second motor 48 to rotate, the rotary shaft 46 and the detecting table 2 are driven by the second gear 49 through the first gear 47, the position of the heat exchanger on the detecting table 2 can be changed by rolling the roller 51 at the top of the base 1, the design of the supporting column 50 and the roller 51, the stability of the inspection table 2 when rotated is increased.
The heat exchanger air tightness detection method of the embodiment uses the heat exchanger air tightness detection device, and comprises the following steps:
step one: connecting the air inlet end of the heat exchanger with the connector 44, blocking the air outlet end of the heat exchanger with a sealing plug, driving the detection table 2 to rotate through a station adjusting structure after the heat exchanger is connected, so that the connected heat exchanger rotates to a detection station, and simultaneously, the connected heat exchanger is positioned below the sealing cover 8, and the movable shell 6 positioned on the detection station moves to the upper part of the connecting pipe 4;
step two: the seal cover 8 is driven to move downwards through the lifting unit, the connected heat exchanger is sealed between the seal cover 8 and the detection table 2, the seal cover 8 drives the movable shell 6 to move downwards through the pressing piece, so that the top end of the connecting pipe 4 is inserted into the movable shell 6, and the connecting pipe 4 is communicated with the first fixed pipe 7 positioned on the detection station through the movable shell 6;
step three: the piston ring 10 is driven to move downwards through the air compression adjusting structure, the piston ring 10 compresses air in the sealing cover 8, the thrust exerted by the air in the sealing cover 8 on the piston disc 11 increases along with the compression of the air in the sealing cover 8, when the thrust exerted by the air in the sealing cover 8 on the piston disc 11 is larger than the resistance born by the movement of the piston disc 11, the air pushes the piston disc 11 to move upwards, at the moment, the air compression adjusting structure stops driving the piston ring 10 to move downwards, the volume of the air in the sealing cover 8 increases due to the upward movement of the piston disc 11, the thrust exerted by the air in the sealing cover 8 on the piston disc 11 decreases, when the thrust exerted by the air in the sealing cover 8 on the piston disc 11 is consistent with the resistance of the upward movement of the piston disc 11, the piston disc 11 stops moving again, at the moment, the piston disc 11 is at a critical point, the moment, the position of the piston disc 11 is detected through the elastic reset detection component, and the correction of the initial position of the piston disc 11 is completed;
step four: the air pump 3 is started, the air pump 3 injects air into the heat exchanger through the connecting pipe 4, the movable shell 6, the first fixed pipe 7, the hose 45 and the connector 44, when the heat exchanger leaks air, the air enters the sealing cover 8 through the gap, the thrust exerted by the air in the sealing cover 8 on the piston disc 11 is increased, the piston disc 11 can be enabled to move upwards again, and the heat exchanger leaks air when the elastic reset detection assembly detects that the piston disc 11 moves upwards.
Working principle: when in operation, the air inlet end of the heat exchanger is connected with the connector 44, the air outlet end of the heat exchanger is blocked by the sealing plug, after the heat exchanger is connected, the detection table 2 is driven to rotate by the station adjusting structure so as to enable the connected heat exchanger to rotate to the detection station, meanwhile, the connected heat exchanger is positioned below the sealing cover 8, the movable shell 6 positioned on the detection station is moved to the upper part of the connecting pipe 4, the sealing cover 8 is driven to move downwards by the lifting unit, the connected heat exchanger is sealed between the sealing cover 8 and the detection table 2, the sealing cover 8 is driven to move downwards by the pressing piece so as to enable the top end of the connecting pipe 4 to be inserted into the movable shell 6, the connecting pipe 4 is communicated with the first fixed pipe 7 positioned on the detection station by the movable shell 6, the piston ring 10 is driven to move downwards by the air compression adjusting structure, the piston ring 10 compresses the air in the sealing cover 8, the thrust exerted by the air in the sealing cover 8 on the piston disc 11 increases along with the compression of the air in the sealing cover 8, when the thrust exerted by the air in the sealing cover 8 on the piston disc 11 is larger than the resistance exerted by the movement of the piston disc 11, the air pushes the piston disc 11 to move upwards, at the moment, the air compression adjustment structure stops driving the piston ring 10 to move downwards, the volume of the air in the sealing cover 8 increases due to the upward movement of the piston disc 11, the thrust exerted by the air in the sealing cover 8 on the piston disc 11 decreases, when the thrust exerted by the air in the sealing cover 8 on the piston disc 11 is consistent with the resistance exerted by the air in the sealing cover 8 on the piston disc 11, the piston disc 11 stops moving again, at the moment, the piston disc 11 is at a critical point, the position of the piston disc 11 is detected by the elastic reset detection component, the correction of the initial position of the piston disc 11 is completed, the air pump 3 is started, the air pump 3 injects air into the heat exchanger through the connecting pipe 4, the movable shell 6, the first fixed pipe 7, the hose 45 and the connector 44, when the heat exchanger leaks air, the air enters the sealing cover 8 through a gap, the thrust exerted by the air in the sealing cover 8 on the piston disc 11 is increased, the piston disc 11 can be enabled to move upwards again, when the elastic reset detection assembly detects that the piston disc 11 moves upwards, the air leakage of the heat exchanger can be known, when the heat exchanger does not leak air, the air cannot enter the sealing cover 8 through the heat exchanger, the height of the piston disc 11 is kept unchanged, the heat exchanger can be known to not leak air, the heat exchanger does not need to be put into water, further the heat exchanger does not need to be dried in the later period, and the heat exchanger is convenient to detect;
the turntable 21 is driven to rotate by the first motor 25, the turntable 21 drives the second damping disk 20 to rotate by the guide sleeve 23 and the second guide post 22, the second damping disk 20 drives the first damping disk 19 and the threaded sleeve 18 to rotate by friction force, the threaded sleeve 18 drives the screw rod 17, the piston ring 10 and the first guide post 16 to move downwards, the piston ring 10 compresses air in the seal cover 8, the air in the seal cover 8 compresses the air in the seal cover 8, the thrust exerted by the air in the seal cover 8 on the piston disk 11 is increased, when the thrust exerted by the air in the seal cover 8 on the piston disk 11 is greater than the resistance exerted by the movement of the piston disk 11, the air pushes the piston disk 11 to move upwards, at the moment, the resistance of the downward movement of the piston ring 10 reaches a preset value, the second damping disk 20 cannot drive the first damping disk 19 and the threaded sleeve 18 to rotate by friction force, the first hydraulic telescopic rod 27 can enable the piston ring 10 to be automatically stopped after being lowered to a preset position, the distance between the first motor 25 and the second damping disk 20 is changed, the distance between the first hydraulic telescopic rod 25 and the first damping disk 21 is changed, when the first hydraulic telescopic rod 24 is automatically compressed, the first damping disk 20 is automatically stopped when the first damping disk 20 is moved to a preset, and the first damping disk 20 is deformed, and the first damping disk is stopped, and the first damping disk is moved to be automatically, and the first damping disk 20 is deformed, and the first damping disk is moved, and the first damping disk 20 is moved, and the first damping disk 20 is automatically, and the position is moved, and the position is 20 is moved and the position and is moved and the front;
when the piston disc 11 moves upwards, the piston disc 11 drives the prism 28 to move upwards relative to the second bracket 29, the second compression spring 30 is in a compressed state, the distance between the distance measuring sensor 32 and the prism 28 can be measured by the distance measuring sensor 32, the change amount of the vertical height of the piston disc 11 can be further known, after the heat exchanger is detected, the lifting unit drives the sealing cover 8 to move upwards, air in the sealing cover 8 can flow with external air, at the moment, the second compression spring 30 drives the piston disc 11 to move downwards, the piston disc 11 is contacted with the top of the supporting ring 12 again, and the piston disc 11 is reset to the initial position;
when the support frame 36 and the seal cover 8 are driven to move downwards through the second hydraulic telescopic rod 35, the seal cover 8 drives the second fixing frame 33 to move downwards, after the second fixing frame 33 contacts with the first supporting part 34, the first supporting part 34 drives the movable shell 6 to move downwards along with the continuous downward movement of the seal cover 8 and the second fixing frame 33, the top end of the connecting pipe 4 is gradually inserted into the movable shell 6 along with the continuous downward movement of the first supporting part 34, the second sealing ring 39 moves towards the supporting ring 38, the second supporting part 42 slides relative to the third guide post 41, the tension spring 43 is in a tension state, when the seal cover 8 descends to the lowest position, the first sealing ring 37 at the bottom of the seal cover 8 and the top of the detection table 2 are increased by the design of the first sealing ring 37, the sealing performance of the joint of the seal cover 8 and the detection table 2 is improved, the bottom of the second sealing ring 39 is tightly attached to the top of the supporting ring 38, and the top end of the connecting tube 4 is tightly attached to the bottom of the third sealing ring 40, the tightness of the connection part between the movable shell 6 and the connecting tube 4 and the first fixed tube 7 is increased by the design of the second sealing ring 39 and the third sealing ring 40, when the second fixing frame 33 does not press the first supporting part 34 any more, the second supporting part 42 is driven by the extension spring 43 to move upwards relative to the first fixed tube 7, the movable shell 6 and the first supporting part 34 are driven by the second supporting part 42 to move upwards relative to the first fixed tube 7 to the initial position, the connecting tube 4 can be separated from the movable shell 6, the second gear 49 is driven by the second motor 48 to rotate, the rotary shaft 46 and the detecting table 2 are driven by the second gear 49 through the first gear 47, the position of the heat exchanger on the detecting table 2 can be changed by rolling the roller 51 at the top of the base 1, the design of the supporting column 50 and the roller 51, the stability of the inspection table 2 when rotated is increased.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a heat exchanger gas tightness detection device, includes base (1) and detects platform (2), its characterized in that: the detection table (2) is arranged above the base (1), a station adjusting structure matched with the detection table (2) is arranged on the base (1), an air pump (3) is fixedly connected to the base (1), a connecting pipe (4) is fixedly connected to the output end of the air pump (3), a first support (5) is fixedly sleeved on the outer fixing sleeve of the connecting pipe (4), the first support (5) is fixedly connected with the base (1), a plurality of first fixing pipes (7) penetrate through the detection table (2), the first fixing pipes (7) are fixedly connected with the detection table (2), a connector (44) used for connecting an air inlet end of a heat exchanger is arranged above the first fixing pipes (7), the connector (44) is connected with the first fixing pipes (7) through a hose (45), a movable shell (6) positioned below the detection table (2) is sleeved outside the first fixing pipes (7), the movable shell (6) and the detection table (2) are connected through a stretcher, a sealing cover (8) is arranged on the movable shell (6) and is respectively matched with a sealing cover (8) and is provided with the bottom end of the sealing cover (8), the sealing cover (8) is connected with the base (1) through the lifting unit, be equipped with the fixed pipe (9) of second in the sealing cover (8), the outside cover of the fixed pipe (9) of second is equipped with piston ring (10), the outside fixed cover of piston ring (10) is equipped with first seal cover (13), the outside cover of the fixed pipe (9) of second is equipped with second seal cover (14), and second seal cover (14) and piston ring (10) fixed connection, the inner wall of first seal cover (13) and sealing cover (8) contacts, the top of the fixed pipe (9) of second runs through sealing cover (8), and the fixed pipe (9) of second and sealing cover (8) fixed connection, be equipped with piston disc (11) in the fixed pipe of second, the bottom of piston disc (11) is equipped with supporting ring (12), the fixed connection of inner wall of supporting ring (12) and second fixed pipe (9), the outside fixed cover of piston disc (11) is equipped with third seal cover (15), and the inner wall of third seal cover (15) and second fixed pipe (9) contacts, be equipped with on sealing cover (8) and detect with elastic component (10) that reset with sealing cover (8) and seal ring matched with on the sealing cover (8).
2. The heat exchanger air tightness detection device according to claim 1, wherein: the air compression adjusting structure comprises a first guide column (16) and a screw rod (17) which are fixedly arranged at the top of a piston ring (10), the first guide column (16) and the screw rod (17) respectively penetrate through a sealing cover (8), a thread sleeve (18) is sleeved on the top rotation of the sealing cover (8), the top end of the screw rod (17) is positioned in the thread sleeve (18), and the thread sleeve (18) is connected with the sealing cover (8) through a rotation adjuster.
3. A heat exchanger air tightness detection device according to claim 2, wherein: the rotary adjuster comprises a first damping disc (19) fixedly mounted at the top of a threaded sleeve (18), a second damping disc (20) is arranged at the top of the first damping disc (19), the second damping disc (20) is contacted with the first damping disc (19), a first motor (25) is arranged above the second damping disc (20), a protecting shell (26) is sleeved outside the first motor (25), the bottom of the protecting shell (26) is fixedly connected with the top of a sealing cover (8), the first motor (25) is connected with the protecting shell (26) through a first hydraulic telescopic rod (27), the output end of the first motor (25) is fixedly connected with a rotary disc (21), a plurality of second guide posts (22) are fixedly connected at the top of the second damping disc (20), a guide sleeve (23) is sleeved outside the second guide posts (22), the top of the guide sleeve (23) is fixedly connected with the rotary disc (21), a first compression spring (24) is sleeved outside the guide sleeve (23), and two ends of the first compression spring (24) are respectively fixedly connected with the second damping disc (20).
4. The heat exchanger air tightness detection device according to claim 1, wherein: the elastic reset detection assembly comprises a prism (28) fixedly mounted at the top of the piston disc (11), a second compression spring (30) and a second support (29) are sleeved outside the prism (28), the bottom of the second support (29) is fixedly connected with the top of the sealing cover (8), two ends of the second compression spring (30) are fixedly connected with the second support (29) and the piston disc (11) respectively, and a detection unit matched with the prism (28) is arranged on the second support (29).
5. The heat exchanger air tightness detection device according to claim 4, wherein: the detection unit comprises a ranging sensor (32) arranged above the prism (28), a first fixing frame (31) is fixedly connected to the second support (29), and the ranging sensor (32) is fixedly arranged on the first fixing frame (31).
6. The heat exchanger air tightness detection device according to claim 1, wherein: the pushing piece comprises a first supporting part (34) fixedly mounted on the movable shell (6), a second fixing frame (33) matched with the first supporting part (34) is fixedly connected to the sealing cover (8), the lifting unit comprises a supporting frame (36) fixedly mounted on the sealing cover (8), the supporting frame (36) is connected with the base (1) through a second hydraulic telescopic rod (35), and a first sealing ring (37) is fixedly connected to the bottom of the sealing cover (8).
7. The heat exchanger air tightness detection device according to claim 1, wherein: the sealing unit comprises a supporting ring (38) arranged in the movable shell (6), the supporting ring (38) is fixedly sleeved outside the first fixed pipe (7), a second sealing ring (39) is arranged at the top of the supporting ring (38), the second sealing ring (39) is fixedly connected with the inner wall of the movable shell (6), and a third sealing ring (40) matched with the connecting pipe (4) is fixedly connected to the inner wall of the movable shell (6).
8. The heat exchanger air tightness detection device according to claim 1, wherein: the stretcher comprises at least two second supporting parts (42) fixedly mounted on the movable shell (6), a third guide column (41) penetrates through the second supporting parts (42), the top end of the third guide column (41) is fixedly connected with the bottom of the detection table (2), an extension spring (43) is sleeved outside the third guide column (41), and two ends of the extension spring (43) are fixedly connected with the detection table (2) and the second supporting parts (42) respectively.
9. The heat exchanger air tightness detection device according to claim 1, wherein: the station adjusting structure comprises a rotating shaft (46) fixedly mounted at the bottom of the detection table (2), the bottom end of the rotating shaft (46) is connected with the top of the base (1) through a bearing, a first gear (47) is fixedly sleeved on the outer portion of the rotating shaft (46), a second motor (48) is fixedly connected to the base (1), a second gear (49) is fixedly connected to the output end of the second motor (48), the second gear (49) is meshed with the first gear (47), a plurality of support columns (50) are fixedly connected to the bottom of the detection table (2), rollers (51) are fixedly connected to the bottom ends of the support columns (50), and the rollers (51) are in contact with the top of the base (1).
10. A heat exchanger air tightness detection method using the heat exchanger air tightness detection device according to claim 1, characterized in that: the method comprises the following steps:
step one: connecting an air inlet end of the heat exchanger with a connector (44), blocking an air outlet end of the heat exchanger by using a sealing plug, driving a detection table (2) to rotate through a station adjusting structure after the heat exchanger is connected, so that the connected heat exchanger rotates to a detection station, and simultaneously, the connected heat exchanger is positioned below a sealing cover (8), and a movable shell (6) positioned on the detection station moves to the upper part of a connecting pipe (4);
step two: the sealing cover (8) is driven to move downwards through the lifting unit, the connected heat exchanger is sealed between the sealing cover (8) and the detection table (2), the sealing cover (8) drives the movable shell (6) to move downwards through the pressing piece, so that the top end of the connecting pipe (4) is inserted into the movable shell (6), and the connecting pipe (4) is communicated with the first fixed pipe (7) positioned on the detection station through the movable shell (6);
step three: the piston ring (10) is driven to move downwards through the air compression adjusting structure, the piston ring (10) compresses air in the sealing cover (8), along with the fact that the air in the sealing cover (8) is compressed, the thrust exerted by the air in the sealing cover (8) on the piston disc (11) is increased, when the thrust exerted by the air in the sealing cover (8) on the piston disc (11) is larger than the resistance exerted by the movement of the piston disc (11), the air pushes the piston disc (11) to move upwards, at the moment, the air compression adjusting structure stops driving the piston ring (10) to move downwards, the volume of the air in the sealing cover (8) is increased due to the fact that the piston disc (11) moves upwards, the thrust exerted by the air in the sealing cover (8) on the piston disc (11) is reduced, when the thrust exerted by the air in the sealing cover (8) on the piston disc (11) is consistent with the resistance exerted by the air in the sealing cover (8), the piston disc (11) is stopped moving upwards, at the moment, the piston disc (11) is at the critical point again, the piston disc (11) is detected to be located at the critical point, the position of the piston disc (11) is detected through the elastic reset detecting component, and correction of the initial position of the piston disc (11) is completed;
step four: starting air pump (3), air pump (3) are with air through connecting pipe (4), movable shell (6), first fixed pipe (7), hose (45) and connector (44) are poured into in the heat exchanger, when heat exchanger leaks gas, in air enters into sealed cowling (8) through the gap, the thrust that air in sealed cowling (8) was applyed piston disc (11) increases, can make piston disc (11) come up again, and when elasticity reset detection subassembly detected piston disc (11) and moved up, can learn heat exchanger gas leakage.
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