CN207941882U - Heat exchanger pipe-expanding device - Google Patents
Heat exchanger pipe-expanding device Download PDFInfo
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- CN207941882U CN207941882U CN201820177798.0U CN201820177798U CN207941882U CN 207941882 U CN207941882 U CN 207941882U CN 201820177798 U CN201820177798 U CN 201820177798U CN 207941882 U CN207941882 U CN 207941882U
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- tube
- tube expansion
- expansion
- machining position
- expander
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Abstract
The utility model discloses a kind of heat exchanger pipe-expanding devices, wherein including：Be translatable guide rail, and the one end for the guide rail that is translatable is provided with initial bit, and for putting the metal tube and tube sheet that wait for tube expansion, metal tube has ductility；The other end of translation guide rail is provided with machining position, to wait for the metal tube of tube expansion and the tube expansion processing site of tube sheet；Initial bit detection module, setting is in initial bit side, for detecting the metal tube being located in initial bit and tube sheet whether in predeterminable area；Translation guide rail by initial bit in predeterminable area metal tube and tube sheet be sent to machining position；Vision system determines that the tube expansion hole site of the tube sheet in machining position, the datum hole of tube sheet add position for demarcating the machine in tube expansion hole for detecting the benchmark hole site of the tube sheet in machining position；Tube expansion module, setting are used for according to determining tube expansion hole site in machining position side to the metal tube and tube sheet progress tube expansion in machining position.The utility model reduces the automatic tube expansion error of heat exchanger.
Description
Technical field
The utility model is related to heat exchanger processing technique fields, in particular to a kind of heat exchanger pipe-expanding device.
Background technology
In the fields such as air-conditioning, chemical industry, the application of heat exchanger is very extensive, it is often necessary to heat exchanger tube sheet with
Heat exchange copper tube carries out expanded joint, to achieve the effect that pressure-bearing and sealing.Expanded joint is to reach sealing and tight using copper pipe and tube plate deformation
Solid a kind of common connection type.During strength and buckling, casing roller expansion head is inserted into copper pipe beam and needs a certain of expanded joint
Copper pipe nozzle rotates, and makes to penetrate the copper tube end portion in tubesheet holes and swells and reach plastic deformation, meanwhile, tubesheet holes is swollen production
Raw flexible deformation.After tube expander exits, the plastic deformation of copper pipe cannot be restored, and the flexible deformation of tube sheet can be restored, in pipe
When the flexible deformation of plate is restored, the contact surface of copper pipe and tube sheet generates prodigious extruding force, makes the copper pipe and tube sheet securely
It is combined together.When expanded joint in need copper pipe expanded joint after, just copper pipe beam is fixed on tube sheet, reach not only seal but also
It is resistant to two purposes of pulling-out force.
In the design, manufacturing process of heat exchanger, the expanded joint problem between copper pipe and tube sheet directly affects production operation
Be normally carried out, or even influence safety and the production of entire air-conditioning or chemical industry equipment.By special pipe expanding equipment expanded joint, can increase
The connection lifetime of copper pipe and tube sheet.The tube expansion of commercialization heat exchanger is manual operation at present：Artificial end holds electric tube expander, by tube expansion
Device is inserted into copper pipe, and tube expander gradually swells copper pipe endoporus in rotation process, realizes the expanded joint of heat exchanger tube sheet and copper pipe.
When using artificial tube expansion, employee needs long-time end to hold tube expander and associated apparatus, and frequently mobile, the degree of automation is low, labor
Fatigue resistance is big；In addition, tube expansion hole number is more, distribution area is wide, and when operation will produce visual fatigue, there is the swollen equivalent risk of leakage.
In order to realize the automatic tube expansion of heat exchanger, in the prior art, usually use symmetrical double tube expansion holders to copper pipe
It is positioned with tube sheet, tube expansion is then carried out by manipulator.When being positioned in this way, it is desirable that copper pipe end face and pipe
Plate is concordant, after copper pipe end face exceeds tube sheet face, is easy to adversely affect vision, generates relative error etc..
Therefore, how to reduce the automatic tube expansion error of heat exchanger becomes technical problem urgently to be resolved hurrily.
Utility model content
The utility model provides a kind of heat exchanger pipe-expanding device, at least to reduce the automatic tube expansion error of heat exchanger.
In order to solve the above technical problems, according to the one side of the embodiment of the present disclosure, the utility model provides a kind of heat
Exchanger pipe-expanding device, including：
Be translatable guide rail, and the one end for the guide rail that is translatable is provided with initial bit, for putting the metal tube and tube sheet that wait for tube expansion, metal
Pipe has ductility；The other end of translation guide rail is provided with machining position, to wait for the metal tube of tube expansion and the tube expansion processing space of tube sheet
Institute；Initial bit detection module, setting is in initial bit side, for whether detecting the metal tube being located in initial bit and tube sheet pre-
If in region；Translation guide rail by initial bit in predeterminable area metal tube and tube sheet be sent to machining position；Vision system,
The tube expansion hole site of the tube sheet in machining position is determined for detecting the benchmark hole site of the tube sheet in machining position, is managed
The machine that the datum hole of plate is used to demarcate tube expansion hole adds position；Tube expansion module, setting is in machining position side, for according to determining swollen
Pore position is to the metal tube and tube sheet progress tube expansion in machining position.
Optionally, further include：Rangefinder, setting is in machining position side, for detecting tube expansion module and being located at machining position
Tube sheet between relative position, to adjust posture of the tube expansion module relative to the tube sheet in machining position.
Optionally, tube expansion module includes：Tube expander, for in machining position metal tube and tube sheet carry out tube expansion behaviour
Make；Power source is connect with tube expander, for providing the power needed for tube expansion operation to tube expander；Manipulator is provided with tube expander
Position is placed, the posture for adjusting tube expander and/or mobile tube expander.
Optionally, tube expansion module further includes：Tube expansion fixture, setting is placed in tube expander on position, for tube expander to be clamped；It is swollen
Pipe clamp has flexible and retractility so that tube expander in machining position metal tube and tube sheet carry out tube expansion operation when
With metal tube flexible contact.
Optionally, be provided with contact sensor on tube expansion fixture, for detect tube expander be inserted into or exit positioned at plus
Metal tube on station exports transducing signal, to control the power direction and size of power source offer.
Optionally, tube expander includes：Multiple balls, under the effect of external force in machining position metal tube and
Tube sheet carries out expanded joint；Mandrel is pyramidal structure, and set overlays in multiple balls, for back and forth being moved under the power that power source provides
Dynamic and/or rotation, to provide the external force needed for expanded joint to multiple balls；Elastic component is arranged between power source and mandrel.
Optionally, tube expansion module further includes：Multiple rubber column gel columns are arranged between tube expansion fixture and tube expander, multiple rubber column gel column rings
Tube expander is arranged in tube expansion fixture contact surface on tube expansion fixture, to provide activity space to tube expander.
Optionally, further include：Lubricating arrangement, for providing lubricating fluid to tube expander；Lubricating arrangement includes：First reagent
Bucket, conveying tube expander is delivered to by liquid line by the lubricating fluid for being stored in the first reagent barrel；Second reagent barrel passes through control
Valve can be disconnected with the first reagent barrel and is connected to, for providing lubricating fluid to the first reagent barrel；Liquid level sensor, for detecting the first examination
Control valve is connected after liquid level sensor detects that the liquid level in the first reagent barrel is less than default liquid level in liquid level in agent bucket, so that
Second reagent barrel provides lubricating fluid to the first reagent barrel.
Optionally, further include：Tube expansion monitoring modular, for detecting for characterizing tube expansion module to the gold in machining position
Belong to pipe and tube sheet carries out the whether qualified tube expansion statistical information of the tube expansion result after tube expansion；Visualization model, for visualize be in
Existing statistical information.
In the present invention, by initial bit detection module to the metal tube in the initial bit of translation guide rail one end
With tube sheet carry out initial bit detection, translation guide rail by initial bit in predeterminable area metal tube and tube sheet be sent to processing
Then the benchmark hole site of tube sheet is detected to determine the position of tubesheet holes by vision system, then enables to tube expansion mould in position
Block is based on tube expansion hole site and carries out tube expansion to metal tube and tube sheet.Require copper pipe end face concordant with tube sheet in compared with the existing technology
The mode of positioning in technical solutions of the utility model, by positioning tubesheet holes to datum hole, can reduce introducing pipe end
The collimation error caused by the detection of face and tube sheet face relative position provides the precision and efficiency of the automatic tube expansion of heat exchanger.
Description of the drawings
Fig. 1 is a kind of heat exchanger pipe-expanding device structural schematic diagram disclosed in the utility model embodiment；
Fig. 2 is a kind of tube expansion module partial structural diagram disclosed in the utility model embodiment；
Fig. 3 is a kind of tube expander attachment structure schematic diagram disclosed in the utility model embodiment；
Fig. 4 a are a kind of rubber column gel column mounting means positive structure diagrams disclosed in the utility model embodiment；
Fig. 4 b are a kind of rubber column gel column mounting means cross-sectional views disclosed in the utility model embodiment；
Fig. 5 is that statistical information example schematic diagram is presented in the utility model embodiment visualization.
Specific implementation mode
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistent with the utility model.On the contrary, they be only with such as
The example of the consistent device and method of some aspects be described in detail in the appended claims, the utility model.
In order to reduce the automatic tube expansion error of heat exchanger, present embodiment discloses a kind of heat exchanger pipe-expanding devices, please join
Fig. 1 is examined, is a kind of heat exchanger pipe-expanding device structural schematic diagram disclosed in the present embodiment, which includes：
Be translatable guide rail 1, initial bit detection module 2, vision system 3 and tube expansion module 4, wherein：
One end of translation guide rail 1 is provided with initial bit 10, and initial bit 10 is for putting the metal tube and tube sheet for waiting for tube expansion, originally
In embodiment, metal tube can be the metal tube that copper pipe, aluminum pipe etc. have certain ductility；The other end of translation guide rail 1 is set
It is equipped with machining position 11, machining position 11 is the tube expansion processing site of the metal tube and tube sheet that wait for tube expansion.In a particular embodiment, it is translatable
The quantity of guide rail 1 can be two, three, can also be other more quantity.It is led referring to FIG. 1, illustrating two translations
The scheme that rail 1 is arranged parallel.
The setting of initial bit detection module 2 is in 10 side of initial bit, for detecting metal tube and pipe in initial bit 10
Whether plate is in predeterminable area.In the present embodiment, initial bit detection module 2 can pass through machine vision and/or range sensor
It realizes, in a particular embodiment, initial bit detection module 2 detects heat exchanger and initially puts azimuth information, specifically, alleged
Predeterminable area can rule of thumb determine that the predeterminable area should meet following condition：Heat exchanger puts orientation and phase
It is reachable to tube expansion module after machining position in translation for the position for the guide rail that is translatable.In the present embodiment, translation guide rail 1 will be located at initial
Metal tube and tube sheet on position in predeterminable area are sent to machining position 11.
Vision system 3 is used to detect the benchmark hole site of the tube sheet in machining position 11 to determine in machining position
The datum hole of the tube expansion hole site of tube sheet, tube sheet adds position for demarcating the machine in tube expansion hole.In the present embodiment, datum hole and tube expansion
The machine in hole adds position relationship, it may be determined that the location information in tube expansion hole.It should be noted that in other alternative embodiments
In, datum hole can also be the existing feature on heat exchanger to substitute or other newly-increased features, as long as can demarcate swollen
The machine of pore adds position.
The setting of tube expansion module 4 is used for according to determining tube expansion hole site in machining position side to the gold in machining position
Belong to pipe and tube sheet carries out tube expansion.Specifically, after determining tube expansion hole site, tube expansion module 4 can be under the driving of mobile mechanism
It is moved to tube expansion hole site, to the metal tube and tube sheet progress tube expansion in machining position.In a particular embodiment, mobile mechanism
It can be realized by robot such as manipulator.
For the ease of dynamically adjusting the position and attitude of tube expansion module 4, in an alternate embodiment of the invention, heat exchanger tube expansion dress
It sets and further includes：Rangefinder, rangefinder setting in machining position side, for detect tube expansion module and tube sheet in machining position it
Between relative position, to adjust posture of the tube expansion module relative to the tube sheet in machining position.
Referring to FIG. 2, being tube expansion module partial structural diagram, in an alternate embodiment of the invention, tube expansion module 4 includes：It is swollen
Pipe device 41, power source 42 and manipulator 43, wherein：
Tube expander 41 be used for in machining position metal tube and tube sheet carry out tube expansion operation.In a particular embodiment,
Tube expander 41 can be realized by existing tube expander.
Power source 42 is connect with tube expander 41, and power source 42 is used to provide the power needed for tube expansion operation to tube expander 41.
In a particular embodiment, power source 42 can be electronic, can also be pneumatic, hydraulic pressure, or can also be it is other can
The unit of output torque.Summarize in some embodiments, power source 42 can also be by deceleration strip or transmission mechanism to tube expander
41 provide power.
Manipulator 43 is provided with tube expander and places position, the posture for adjusting tube expander and/or mobile tube expander.
Referring to FIG. 3, being tube expander attachment structure schematic diagram, in an alternate embodiment of the invention, tube expansion module further includes：Tube expansion
Fixture 44, tube expansion fixture 44 is arranged on the tube expander placement position of manipulator 43, for tube expander 41 to be clamped.In specific embodiment
In, tube expansion fixture 44 has flexible and retractility so that tube expander in machining position metal tube and tube sheet carry out it is swollen
When pipe operates with metal tube flexible contact, thus, it is possible to ensure that tube expander on power source drive fixture is inserted into the mistake of metal tube
Same heat exchanger rigid contact is avoided in journey, and either heat exchanger is impaired or shifts for tube expander, is caused to subsequent expanded joint
It influences.
In an alternate embodiment of the invention, it is provided with contact sensor on tube expansion fixture 44, for detecting tube expander insertion
Or the metal tube output transducing signal in machining position is exited, to control the power direction and size of power source offer.Specifically
Ground, using power source as pneumatic power source as an example, during tube expander on mechanical hand-motion fixture is inserted into metal tube, when
Tube expander encounter tube sheet or exit metal pipe mouth when, tube expansion fixture 44 should start to compress, at this point, contact sensor export
For characterizing the output signal for starting compression, gas circuit is switched to low pressure at this time, in order to which fixture compresses；When decrement reaches given
When amount, contact sensor output stops compressing at this time and starts expanded joint for characterizing the output signal for stopping compression.
In an alternate embodiment of the invention, tube expander includes：Multiple balls, mandrel and elastic component, wherein：Multiple balls are used for
To the metal tube and tube sheet progress expanded joint in machining position under the action of external force；Mandrel is pyramidal structure, and set overlays on multiple rollings
It is outer needed for expanded joint to be provided to multiple balls for moving back and forth and/or rotating under the power that power source provides in pearl
Power；Elastic component is arranged between power source and mandrel, and in a particular embodiment, elastic component can come real for example, by compressed spring
It is existing.During expanded joint, when fixture is compressed, mandrel can stretch out a bit of, elimination rolling under the action of compression spring force
The gap of pearl and ball frame, extra amount of movement meeting " temporary " wait for during follow-up expanded joint in copper pipe in spring-compressed section
Hole becomes larger, and is constantly stretched out after having space.In the present embodiment, tube expansion fixture compression process makes compressed spring lay in certain energy
Amount pushes the tube expander on sliding block constantly to march forward, and analog manual operation's action makes automatic expanding be connected on mechanism action and accords with
Close technological requirement.
In an alternate embodiment of the invention, tube expansion module further includes：Multiple rubber column gel columns please refer to Fig.4 a and Fig. 4 b, illustrate rubber column gel column
Mounting means, wherein Fig. 4 a are positive structure diagram, and Fig. 4 b are cross-sectional view, and multiple rubber column gel columns 45 are arranged in tube expansion
Between fixture 44 and tube expander 41,45 ring tube expander of multiple rubber column gel columns and tube expansion fixture contact surface are arranged on tube expansion fixture, with to
Tube expander provides activity space.To so that 360 ° of directions of tube expander all have certain movable quantity space, to a certain extent
The centrifugation degree deviation for containing tube expander and metal tube, further ensures that expanded joint quality.
In an alternate embodiment of the invention, which further includes：Lubricating arrangement, for providing profit to tube expander
Synovia.In a particular embodiment, lubricating arrangement includes：First reagent barrel, the second reagent barrel and liquid level sensor, wherein：First
The lubricating fluid for being stored in the first reagent barrel is delivered to conveying tube expander by reagent barrel by liquid line, to moisten to tube expander
It is sliding, it can be infiltration type specifically, can also be fountain；Second reagent barrel can be disconnected by control valve and the first reagent barrel
Connection, for providing lubricating fluid to the first reagent barrel；Liquid level sensor is used to detect the liquid level in the first reagent barrel, level sensing
After device detects that the liquid level in the first reagent barrel is less than default liquid level, control valve is connected, so that the second reagent barrel is to the first reagent
Bucket provides lubricating fluid, so that it is guaranteed that there is enough reagents to be cooled down for tube expander in the first reagent barrel.In the present embodiment, pass through lubrication
Self-lubricate, the cooling of tube expander may be implemented in device.
In an alternate embodiment of the invention, which further includes：Tube expansion monitoring modular and visualization model,
In, tube expansion monitoring modular be used for detect for characterize tube expansion module in machining position metal tube and tube sheet progress tube expansion after
The whether qualified tube expansion statistical information of tube expansion result；Statistical information is presented for visualizing in visualization model.It is being embodied
In example, the contact force of metal tube and tube sheet after tube expansion can be detected by force snesor, can also be examined by machine vision
The gap etc. for surveying metal tube and tube sheet, to determine whether tube expansion result is qualified, specifically, when tube expansion result qualification, contact force is big
Small and gap size can be determined rule of thumb.Referring to FIG. 5, the schematic diagram that statistical information is presented in visualization is illustrated,
In, heavy line is the metal tube of tube expansion result qualification, and fine line is to wait for the metal tube of expanded joint, it is, of course, also possible to come by a dotted line
Indicate the underproof metal tube of tube expansion result.It should be noted that above-mentioned example, which only illustrates visualization, is presented statistical information,
It cannot be assumed that different face can also be passed through in other alternative embodiments for the restriction to the present embodiment technical solution
Color, different symbols etc. distinguish different tube expansion results.
Heat exchanger pipe-expanding device disclosed in the present embodiment, by initial bit detection module to positioned at translation guide rail one end
Metal tube in initial bit and tube sheet carry out initial bit detection, and translation guide rail is by the metal tube in initial bit in predeterminable area
It is sent to machining position with tube sheet, then, the position of tubesheet holes is determined by the benchmark hole site of vision system detection tube sheet, after
And it enables to tube expansion module to be based on tube expansion hole site and tube expansion is carried out to metal tube and tube sheet.Copper is required in compared with the existing technology
The end surfaces mode positioned concordant with tube sheet, can by positioning tubesheet holes to datum hole in technical solutions of the utility model
It reduces and introduces the collimation error caused by the detection of metal tube end face and tube sheet face relative position, provide heat exchanger automatic expanding
The precision and efficiency of pipe.
Those skilled in the art will readily occur to this practicality after considering specification and putting into practice utility model disclosed herein
Novel other embodiments.This application is intended to cover any variations, uses, or adaptations of the utility model, these
Variations, uses, or adaptations follow the general principle of the utility model and include the non-utility model of the utility model
Common knowledge in the art or conventional techniques.The description and examples are only to be considered as illustrative, this practicality is new
The true scope and spirit of type are indicated by the following claims.
It should be understood that the utility model is not limited to the accurate knot for being described above and being shown in the accompanying drawings
Structure, and various modifications and changes may be made without departing from the scope thereof.The scope of the utility model is only wanted by appended right
It asks to limit.
Claims (9)
1. a kind of heat exchanger pipe-expanding device, which is characterized in that including：
Be translatable guide rail, and one end of the translation guide rail is provided with initial bit, described for putting the metal tube and tube sheet that wait for tube expansion
Metal tube has ductility；The other end of the translation guide rail is provided with machining position, for the metal tube and tube sheet for waiting for tube expansion
Tube expansion processing site；
Initial bit detection module, setting is in the initial bit side, for detecting metal tube and pipe in the initial bit
Whether plate is in predeterminable area；It is described translation guide rail by the initial bit in predeterminable area metal tube and tube sheet transmit
To the machining position；
Vision system is determined for detecting the benchmark hole site of the tube sheet in the machining position positioned at the machining position
Tube sheet tube expansion hole site, the machine that the datum hole of the tube sheet is used to demarcate tube expansion hole adds position；
Tube expansion module, setting in the machining position side, for according to determining tube expansion hole site to being located at the machining position
Metal tube and tube sheet carry out tube expansion.
2. heat exchanger pipe-expanding device as described in claim 1, which is characterized in that further include：
Rangefinder is arranged in the machining position side, for detecting the tube expansion module and the tube sheet in the machining position
Between relative position, to adjust posture of the tube expansion module relative to the tube sheet in the machining position.
3. heat exchanger pipe-expanding device as claimed in claim 1 or 2, which is characterized in that the tube expansion module includes：
Tube expander, for in the machining position metal tube and tube sheet carry out tube expansion operation；
Power source is connect with the tube expander, for providing the power needed for tube expansion operation to the tube expander；
Manipulator is provided with tube expander and places position, the posture for adjusting the tube expander and/or the mobile tube expander.
4. heat exchanger pipe-expanding device as claimed in claim 3, which is characterized in that the tube expansion module further includes：
Tube expansion fixture, setting is placed in the tube expander on position, for the tube expander to be clamped；The tube expansion fixture has flexibility
And retractility so that the tube expander in the machining position metal tube and tube sheet carry out tube expansion operation when with it is described
Metal tube flexible contact.
5. heat exchanger pipe-expanding device as claimed in claim 4, which is characterized in that be provided with contact on the tube expansion fixture and pass
Sensor, for detecting the tube expander insertion or exiting the metal tube output transducing signal in the machining position, with
Control the power direction and size that the power source provides.
6. heat exchanger pipe-expanding device as claimed in claim 3, which is characterized in that the tube expander includes：
Multiple balls, under the effect of external force to the metal tube and tube sheet progress expanded joint in the machining position；
Mandrel is pyramidal structure, and set overlays in the multiple ball, for being moved back and forth under the power that the power source provides
And/or rotation, to provide the external force needed for expanded joint to the multiple ball；
Elastic component is arranged between the power source and the mandrel.
7. heat exchanger pipe-expanding device as claimed in claim 4, which is characterized in that the tube expansion module further includes：
Multiple rubber column gel columns are arranged between the tube expansion fixture and the tube expander, tube expander and institute described in the multiple rubber column gel column ring
It states tube expansion fixture contact surface to be arranged on the tube expansion fixture, to provide activity space to the tube expander.
8. heat exchanger pipe-expanding device as claimed in claim 3, which is characterized in that further include：
Lubricating arrangement, for providing lubricating fluid to the tube expander；The lubricating arrangement includes：
The lubricating fluid for being stored in first reagent barrel is delivered to conveying tube expander by the first reagent barrel by liquid line；
Second reagent barrel can be disconnected with first reagent barrel by control valve and is connected to, for being provided to first reagent barrel
Lubricating fluid；
Liquid level sensor, for detecting the liquid level in first reagent barrel, the liquid level sensor detects first examination
After liquid level in agent bucket is less than default liquid level, the control valve is connected, so that second reagent barrel is to first reagent barrel
Lubricating fluid is provided.
9. heat exchanger pipe-expanding device as claimed in claim 1 or 2, which is characterized in that further include：
Tube expansion monitoring modular, for detecting for characterizing the tube expansion module to the metal tube and tube sheet in the machining position
Carry out the whether qualified tube expansion statistical information of the tube expansion result after tube expansion；
The statistical information is presented for visualizing in visualization model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820177798.0U CN207941882U (en) | 2018-02-01 | 2018-02-01 | Heat exchanger pipe-expanding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820177798.0U CN207941882U (en) | 2018-02-01 | 2018-02-01 | Heat exchanger pipe-expanding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207941882U true CN207941882U (en) | 2018-10-09 |
Family
ID=63698818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820177798.0U Withdrawn - After Issue CN207941882U (en) | 2018-02-01 | 2018-02-01 | Heat exchanger pipe-expanding device |
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| Country | Link |
|---|---|
| CN (1) | CN207941882U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108202110A (en) * | 2018-02-01 | 2018-06-26 | 珠海格力电器股份有限公司 | Heat exchanger pipe-expanding device |
-
2018
- 2018-02-01 CN CN201820177798.0U patent/CN207941882U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108202110A (en) * | 2018-02-01 | 2018-06-26 | 珠海格力电器股份有限公司 | Heat exchanger pipe-expanding device |
| CN108202110B (en) * | 2018-02-01 | 2023-08-15 | 珠海格力电器股份有限公司 | Heat exchanger tube expanding device |
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