CN1924419A - Coiling modeled steel/plastic composite pipe and its preparing process and equipment - Google Patents
Coiling modeled steel/plastic composite pipe and its preparing process and equipment Download PDFInfo
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- CN1924419A CN1924419A CN 200610140467 CN200610140467A CN1924419A CN 1924419 A CN1924419 A CN 1924419A CN 200610140467 CN200610140467 CN 200610140467 CN 200610140467 A CN200610140467 A CN 200610140467A CN 1924419 A CN1924419 A CN 1924419A
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- strengthening rib
- band
- steel
- steel band
- composite pipe
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Abstract
This invention relates to one steel compound tube for rolling shape, which comprises one plastic tube and strengthen rib, wherein, the rib is composed of strengthen steel band; the rib stem part and plastic out surface are connected by large diameter round angle or triangle structure stretching into rib plastic tube materials. This invention also provides one method and device of steel compound tube.
Description
Technical field
The present invention relates to a kind of steel-plastic composite pipe and manufacture method and equipment of coiling and molding.Specifically, be on integrated apparatus, steel band and plastics to be compounded to form heterotypic strip, again on the wind of special use with the Wrapping formed plastic composite pipe that strengthens for steel band of the heterotypic strip after compound.
Background technique
CN1702242A discloses a kind of steel band reinforced plastic drainpipe and manufacture method and manufacturing installation, but it only limits to diameter less than the composite pipe below the 1200mm.When producing diameter greater than 1200mm, ring stiffness 〉=8KN/m
2Heavy caliber, epipodium stiffness pipe the time, because of height and the thickness that strengthens steel band is bigger, adopt the technology of CN1702242A following problem can occur: the problem that on the link of twining on the storage tep reel, exists the strengthening rib lodging at compound heterotypic strip; Decontrol from the storage tep reel at band and to deliver on the link that Stetch Wrapping Machine is wound in pipe, exist the crooked band of lodging can't enter " roller cage " the formula wind that has the roll extrusion sheave, or make a forcible entry into " roller cage " formula wind and cause plastic layer to be rolled the problem of stripping damage.In addition, CN1702242A does not relate to cutting technique, and finally to cut into suitable length to tubing, but structural feature according to CN1702242A, can infer and adopt conventional tubing cutting method (band saw or round disk saw) cutting composite pipe, because the influence of strengthening rib can't realize the plastic-steel coiled composite tube is normally cut.Therefore, have only the above-mentioned technical barrier of solution, can realize the manufacturing of heavy caliber, high ring rigidity steel-plastic composite pipe.The key problem in technology of dealing with problems mainly is how to control steel is moulded compound heterotypic strip strengthening rib when twining on the storage tep reel lodging; How will there be to a certain degree the strengthening rib of lodging set upright, makes compound heterotypic strip enter Stetch Wrapping Machine smoothly the band alignment of bending; Find a kind of method of cutting the steel-plastic composite pipe of coiling and molding.
Summary of the invention
An object of the present invention is to provide a kind of steel-plastic composite pipe at the coiling and molding with structure resistant to lodging that to a certain degree can prevent the strengthening rib lodging.
Another object of the present invention provides a kind of may command strengthening rib lodging and the strengthening rib of lodging is set upright, and can normally cut the method for the steel-plastic composite pipe of this coiling and molding.
A further object of the present invention provides a kind of equipment of making the steel-plastic composite pipe of this coiling and molding, and it has the device of control strengthening rib lodging and device that strengthening rib is set upright and the cutting device that can normally cut this pipe.
For achieving the above object, the steel-plastic composite pipe of coiling and molding provided by the invention comprise a plastic tube body and with body all-in-one-piece strengthening rib, be compounded with the enhancing steel band in the strengthening rib, the root that it is characterized in that strengthening rib is connected with large diameter fillet or triangular structure transition with the outer surface of plastic tube body, strengthens steel band and extends in the plastic tube body material below the strengthening rib.
The method of the steel-plastic composite pipe of this coiling and molding of manufacturing provided by the invention comprises the steps: that a. is compounded to form the heterotypic strip with steel band strengthening rib with steel band and plastics; B. by the lodging-prevention device heterotypic strip is wound on the storage tep reel; The storage tep reel that c. will be wound with heterotypic strip is transported to the erecting bed; D. will be by straight righting device from storage tep reel strengthening rib bending of emitting and straight the setting upright of heterotypic strip of being out of shape; E. twine the also steel-plastic composite pipe of melting welding heterotypic strip formation coiling and molding; F. steel-plastic composite pipe is desired the cut place and scrape band, and cut off, take out the enhancing steel band on the tubing cutting section, position the cutting steel-plastic composite pipe along the tubing cutting section of having removed steel band again.
The equipment of the steel-plastic composite pipe of this coiling and molding of manufacturing provided by the invention comprises that a. is compounded to form the heterotypic strip integrated apparatus with steel band strengthening rib with steel band and plastics; B. the lodging-prevention device be used for anti-down throw oneself on the ground with heterotypic strip be wound into the storage tep reel; C. will be from storage tep reel strengthening rib bending of emitting and the straight straight righting device of setting upright of heterotypic strip that is out of shape; D. twine the also wind of melting welding heterotypic strip formation steel band reinforced plastics composite tube; E cuts off the cutting of composite pipe enhancing steel band and scrapes belting.
Wrapping formed steel-plastic composite pipe according to the improvement manufacturing of the invention described above strengthened lodging tolerance on structure He the manufacture process, guaranteed the ordinary production of major diameter, high ring rigidity pipeline.
Description of drawings:
Fig. 1 is that the lodging schematic representation appearred in strengthening rib when band twined on the storage tep reel in the prior art;
Fig. 2 moulds compound heterotypic strip sectional view for the steel that improves back fillet enhancing resistant to lodging of the present invention;
Fig. 3 is the compound heterotypic strip sectional view of plastic-steel that improvement Vee formation shape resistant to lodging of the present invention strengthens;
Fig. 4 is the compound heterotypic strip manufacturing installation of the steel band reinforced plastic plan view that has improved inner die cavity of the present invention;
The schematic representation that Fig. 5 inserts and uses for setting upright of lodging-prevention device of the present invention;
Fig. 6 is the schematic representation of inserting and using of setting upright when twining band on the storage tep reel of the present invention;
Fig. 7 be band in straight righting device of the present invention by alignment after the profile schematic representation;
Fig. 8 is a straight righting device structural representation of the present invention;
Fig. 9 is the of the present invention straight righting device band righting mechanism schematic representation of the K of Fig. 8 to expression;
Figure 10 is the of the present invention straight righting device opener structure schematic representation of the A-A of Fig. 8 to expression;
Figure 11 is the view that the compound heterotypic strip of the steel band reinforced plastic of prior art twines the wind that forms steel-plastic composite pipe;
Figure 12 is that the A-A of Figure 11 is to sectional view;
Figure 13 scrapes belting working principle schematic representation for cutting of the present invention;
Figure 14 scrapes the belting enlarged diagram for cutting of the present invention;
Figure 15 is a doctor blade device position view of the present invention;
Figure 16 punctures band outer rim plastics schematic representation for scraper of the present invention;
Figure 17 cuts off the steel band schematic representation for the manual broken belt pincers of the present invention;
Figure 18 takes out the steel band schematic representation of cut-out for the present invention;
Figure 19 makes schematic representation for the sawed-off plumber of cutting of the present invention;
Figure 20 is the pipe schematic representation that cuts off of the present invention.
Embodiment
The situation schematic representation of lodging appearred in strengthening rib 1 when Fig. 1 represented that compound heterotypic strip 123 twines on storage tep reel 10, made the high more tubing (strengthening rib height and thickness are big more) of ring stiffness, and the situation that above-mentioned lodging appears in its strengthening rib 1 is just serious more.The strengthening rib 1 that has coated steel band 2 among Fig. 1 can not show in various degree inclination and lodging in vertical state with plastic tube body 3.
Fig. 2, Fig. 3 are expressed as the lodging that stops strengthening rib 1, and the band cross section redesigns, and the steel after the improvement is moulded compound heterotypic strip sectional view, have represented to strengthen the shape that the root plastic substrate of steel band 2 is widened, thickeied among the figure.In order to strengthen the effect resistant to lodging of strengthening rib, steel band 2 root plastics preferably two right angle sides at the triangle more than the 8mm (more than 8 * 8) or fillet radius reinforced structure at the major diameter fillet (more than the R8) more than the 8mm.Steel band 2 extend into certain depth H in the plastic tube body 3, and depth H can reach the 1/3-1/2 of body plastics wall thickness, more helps the stability of strengthening rib.
Fig. 4 is the compound heterotypic strip manufacturing installation of a steel band reinforced plastic plan view.Comprising steel band unreeling device 4, deflector roll 5, extruder 6, composite machine head 7, typing platform 8, tractor 9, storage tep reel 10, steel band 2, compound heterotypic strip 123.
Referring to Fig. 4, in process of production, at first by the steel band 2 of tractor 9 tractions from unreeling device 4, steel band 2 is entered under the guiding of deflector roll 5 extrude compound critical component composite machine head 7, composite machine head 7 at right angles is connected with extruder 6, inside die cavity after it improves has and compound heterotypic strip 123 corresponding shapes, and by in the composite machine head 7, plastic extruder 6 is clamp-oned molten plastic in composite machine head 7 at steel band 2.The plastics of fusion under the tractive force effect of tractor 9, involve steel band 2 periphery parcels in composite machine head 7 in composite machine head 7, form unshaped compound heterotypic strip 123.Unshaped compound heterotypic strip 123 moves ahead under the effect of tractor, cooling and shaping through typing platform 8 reaches the normal temperature state, form the compound heterotypic strip 123 shown in Fig. 2,3 with strengthening rib 1, compound heterotypic strip 123 behind the cooling and shaping is wound into dish on storage tep reel 10, wind is standby in the wait.
Fig. 5 has represented setting upright of lodging-prevention device 11 schematic representation that combine with compound heterotypic strip 123 of inserting.Fig. 6 represents to set upright to insert and 11 is wound in the dish process on the tep reel 10 toward storage at compound heterotypic strip 123, in order to prevent that strengthening rib 1 from lodging into the shape of Fig. 1 under the condition without any constraint, A place before compound heterotypic strip does not also enter the take-up bending will set upright in 11 dead slots that are fixed between the compound heterotypic strip strengthening rib 1 of inserting, shown in Fig. 5,6.Setting upright inserts 11 can be spaced a distance and install one, and several piece sets upright to insert and 11 together enter the storage tep reel with band and twine take-up, as shown in Figure 6.Twine to take off to set upright from band again behind several circles and insert 11 for recycling.Set upright that insert 11 can be with duroplasts or metallic material manufacturing.
Fig. 7 represents the distortion situation schematic representation that band may occur in alignment process.When compound heterotypic strip was emitted from storing up tep reel, the profile of compound heterotypic strip was crooked and strengthening rib 1 has lodging in various degree.In this case, compound heterotypic strip can not be sent into smoothly in the Wrapping formed cage and be wound in pipe, needs straight righting device earlier with the band alignment for addressing the above problem, and the strengthening rib 1 of lodging is set upright and band could be sent in the moulding cage.The straight righting device structure that Fig. 8 represents is made up of righting mechanism 12 and opener structure 13.
Effect referring to the righting mechanism 12 of Fig. 8,9 straight righting devices is earlier the strengthening rib 1 of lodging to be set upright.Righting mechanism 12 is made of a rotary plain-barreled roll 14 and some turbination parts 15 and positioning frameworks that are parallel to each other of matching with plain-barreled roll, gap between the inverted cone post 15 of several metallic material is the passage of three strengthening rib of compound heterotypic strip, has constituted the band plane passages between the end face of inverted cone post 15 and the plain-barreled roll 14.Under the tension of wind, when band 123 passed through strengthening rib righting mechanism 12, the strengthening rib of lodging can be set upright by force by metal inverted cone post 15, reaches the purpose of setting upright strengthening rib 1.Righting mechanism 12 can be done fluctuating to a certain degree along two guide pillars 16, the variation of height when entering to adapt to band, and guide pillar 16 can be fixing through adjusting the back with the relative angle of band, make righting mechanism 12 adapt to band entering angle degree better.
Figure 10 is straight righting device opener structure schematic representation, referring to Fig. 8 and Figure 10 opener structure 13 by arranging that up and down axis is parallel to each other, the position can be adjusted and three fixing round rollers constitute.Two top plain-barreled rolls 17 are on same horizontal plane, and level interval is adjustable.A grooved roller 18 is installed below, and its central position can vertically be adjusted up and down, and the groove quantity of this grooved roller 18 is corresponding with the quantity of band 123 strengthening rib 1.The center line of three rollers must constitute isosceles triangle in perpendicular to the plane of three roll axis.Band enters opener structure 13 through behind the righting mechanism 12 of strengthening rib by shown in Fig. 8,10, through after the three roller extrusion-deformations and by alignment.Strengthening rib 1 produces distortion shown in Figure 7 in the alignment process, and the amplitude of deformation of strengthening rib 1 is limited in the scope of groove width of grooved roller 18.In order to guarantee that the band after the alignment can smooth and easyly enter wind, the groove width of grooved roller is not more than the groove width of all grooved rollers on the wind.The adjustment in plain-barreled roll 17 on the opener structure and grooved roller 18 3 roller gaps is to reach the best in quality being as the criterion of alignment of adjusting band.
Figure 11 and 12 is views of expression steel band reinforced plastic compound heterotypic strip wind, and wind comprises framework 19, plain-barreled roll 20, grooved roller 21, pressure roller 22, belt delivering roller 23, heating blower 24, little extruder 25, compound heterotypic strip 123, Wrapping formed steel band reinforced plastics composite tube 26 among Figure 11 and Figure 12.
Among Figure 11 and Figure 12, the basic winding process that forms steel band reinforced plastics composite tube 26 is as follows: at the uniform velocity sent in " roller cage " formula wind of being made up of framework 19, a plurality of plain-barreled roll 20 and a plurality of grooved roller 21 through the conveying equipment that furnish rolls 23 and pressure roller 22 constitute through the compound heterotypic strip 123 that straight righting device is set upright after straight, the strengthening rib of sending on the compound heterotypic strip 123 in " roller cage " 1 moves in a circle along the fixedly helix that the groove on a plurality of grooved rollers 21 is linked to be in " roller cage ", thereby spiral twines.Because twining and forming steel band reinforced plastics composite tube 26 is continuous processes, therefore, compound heterotypic strip 123 is constantly sent into from the tangent direction of " roller cage " lower end, and with surface, the outer of steel band reinforced plastics composite tube 26 overlap joint before by the heating blower 24 of a special use two overlap joint surfaces are melted slightly with the hot blast heating, extrude the plastics of fusion with little extruder 25 to the overlap joint surface simultaneously, then, overlap two overlap joint surfaces also with 22 compactings of adjustable pressure roller, make the compound heterotypic strip 123 of adjacent winding be fused into one, formed steel band reinforced plastics composite tube 26 behind the natural cooling.
Grooved roller 21 and plain-barreled roll 20 circumference in " roller cage " evenly distributes, and the groove that distributes on each grooved roller 21 circumference is interconnected to form helix, and the width of the spacing of groove, groove equates with the spacing of the strengthening rib of band, the width of strengthening rib.
Figure 13 represents that cutting scrapes belting working principle schematic representation.When the steel-plastic composite pipe to winding shaping carried out customized cut-off, cutting method key of the present invention was the steel band of cutting section is taken out, taken out the steel band of cutting section after, just can cut the residual plastic pipe with common round disk saw at this section.Getting the steel band implementation process is earlier the plastics of steel band outer rim to be wiped off, nips off steel band and taking-up with the broken belt pincers again.Detailed process is referring to Figure 13, after compound heterotypic strip enters Wrapping formed cage 27 moulding entwining tube and reaches the composite pipe 26 of certain-length, triggers fixed length signaling switch 29.Signaling switch 29 sends signal and makes several (identical with the strengthening rib number) be installed in the belting 28 of scraping that Wrapping formed cage 27 goes out on the pipe end face together to move, and the plastics of composite pipe strengthening rib outer rim are punctured.Figure 14 represents to scrape the belting enlarged diagram, the structure of scraping belting 28 as shown in figure 14, it is made up of cylinder 30 and scraper 31, when cylinder 30 is pneumatic, will drive the outer rim plastics that scraper 31 moved downward and touched strengthening rib, composite pipe 26 in Wrapping formed process while rotating axial advancement, scraper 31 just punctures the outer rim plastics of strengthening rib and wipe off, has exposed the reinforcement steel band 2 of certain-length.Behind the plastics of wiping strengthening rib outer rim certain-length L off, cylinder 30 piston rods rise, and take up scraper 31 and leave the composite pipe outer rim.Figure 15 represents scraper mounting point schematic representation, the quantity of scraper is identical with the quantity of strengthening rib, and the mounting point of scraping belting 28 will overlap with the position that strengthening rib comes out of steamer, and simultaneously the width of scraper can not surpass groove width between strengthening rib and could guarantee to scrape off that plastics expose the width W of steel band and the cutting section width of composite pipe is close.Figure 16 represents composite pipe in Wrapping formed process, wrapped tube 26 rotation on one side, and scraper 31 punctures the outer rim plastics and wipes the sight of plastics continuously off.
Figure 17 represents that manual broken belt pincers cut off the steel band schematic representation, and after scraper swept plastics, composite pipe will be manually clamps 32 with special-purpose broken belt and will strengthen steel band 2 at the every two ends that scrape steel band and cut off in rotary course.
Figure 18 represents to take out the schematic representation of cutting off steel band, and the artificial steel band 2 that uses special-purpose getting to be with pincers to cut off takes out.Band has several strengthening rib will take out several sections steel bands, and the steel band that takes out almost constitutes a week of composite pipe, has formed the pure plastic pipe section of certain width.
Figure 19 represents to cut sawed-off plumber and makes schematic representation, and when the cutting section width W of the composite pipe 26 that takes out band arrived cast-cutting saw 33 positions, cast-cutting saw 33 started.Cast-cutting saw 33 is in the process with the axial velocity advanced in unison of entwining tube, and cast-cutting saw 33 advances sawing and cuts, and after entwining tube 26 rotates a circle, finishes Pipe Cutting work.
Figure 20 represents to cut off the pipe schematic representation, uses the common disk cast-cutting saw just can be with residual plastic pipe embryo fast shut-off.In the W width range, steel band takes out, and the residual plastic pipe can be cut off easily by round disk saw.
Claims (10)
1. the steel-plastic composite pipe of a coiling and molding, comprise a plastic tube body and with body all-in-one-piece strengthening rib, be compounded with the enhancing steel band in the strengthening rib, the root that it is characterized in that strengthening rib is connected with large diameter fillet or triangular structure transition with the outer surface of plastic tube body, strengthens steel band and extends in the plastic tube body material below the strengthening rib.
2. composite pipe according to claim 1, the fillet radius that wherein is used for supporting effect more than the 8mm or triangle two right angle sides that are used for supporting effect more than 8mm, strengthen steel band and extend in the plastic tube body material below the strengthening rib degree of depth in the 1/3-1/2 scope.
3. a method of making the steel-plastic composite pipe of coiling and molding comprises the steps: that a. is compounded to form the heterotypic strip with steel band strengthening rib with steel band and plastics; B. by the lodging-prevention device heterotypic strip is wound on the storage tep reel; The storage tep reel that c. will be wound with heterotypic strip is transported to the erecting bed; D. will be by straight righting device from storage tep reel strengthening rib bending of emitting and straight the setting upright of heterotypic strip of being out of shape; E. twine the also steel-plastic composite pipe of melting welding heterotypic strip formation coiling and molding by wind; F. steel-plastic composite pipe is desired the cut place and scrape band, and cut off, take out the enhancing steel band on the tubing cutting section, position the cutting steel-plastic composite pipe along the tubing section of having removed steel band again.
4. method according to claim 3 is characterized in that the lodging-prevention device is spaced apart and arranged in the compound heterotypic strip strengthening rib, together enters the storage tep reel with band and twines take-up, it is taken off for recycling from band after twining several circles again.
5. method according to claim 3, it is characterized in that with band from the storage tep reel send into " roller cage " formula wind process by straight righting device righting mechanism and the opener structure is set upright strengthening rib and with the band alignment.
6. method according to claim 3 is characterized in that coming out strengthening rib is scraped band from wind at the steel-plastic composite pipe strengthening rib.
7. equipment of making the steel-plastic composite pipe of coiling and molding, comprising: a. is compounded to form the heterotypic strip integrated apparatus with steel band strengthening rib with steel band and plastics; B. twine the also wind of melting welding heterotypic strip formation steel band reinforced plastics composite tube; It is characterized in that also comprising that c. lodging-prevention device is used for anti-down throwing oneself on the ground heterotypic strip is wound into the storage tep reel; D. will be from storage tep reel strengthening rib bending of emitting and the straight straight righting device of setting upright of heterotypic strip that is out of shape; E. cut off the cutting of composite pipe enhancing steel band and scrape belting.
8. equipment according to claim 7, it is characterized in that the lodging-prevention device by setting upright of duroplasts or metallic material manufacturing insert (11) constitute, it is fixed in the dead slot between the compound heterotypic strip strengthening rib (1), be spaced a distance and install one, and several piece is set upright insert (11) and is together entered the storage tep reel with band, sets upright insert (11) and can take off for recycling from band after twining several circles on the storage tep reel with band.
9. equipment according to claim 7, it is characterized in that straight righting device comprises righting mechanism (12) and opener structure (13), wherein righting mechanism (12) comprises plain-barreled roll (14) and turbination parts (15), gap between the inverted cone post (15) is the passage of compound heterotypic strip strengthening rib, has constituted the band plane passages between the end face of inverted cone post (15) and the plain-barreled roll (14); Opener structure (13) is by arranging that up and down three round rollers that axis is parallel to each other constitute, top two plain-barreled rolls (17) are on same horizontal plane, level interval is adjustable, a grooved roller (18) is installed below, its central position can vertically be adjusted up and down, the groove quantity of grooved roller (18) is corresponding with the quantity of band strengthening rib (1), and the center line of three rollers must constitute isosceles triangle in perpendicular to the plane of three roll axis, and the groove width of grooved roller is not more than the groove width of all grooved rollers on the wind.
10. equipment according to claim 7, it is characterized in that cutting scrapes belting and comprise and scrape belting and cutting device, wherein scraping belting is made up of the cylinder (30) of scraper (31) and drive scraper (31) motion, the quantity of scraper is identical with the quantity of strengthening rib, the mounting point of scraping belting (28) overlaps from the position that wind comes out with strengthening rib, and the width of scraper is less than or equal to the groove width between strengthening rib; Cutting device comprises the manual broken belt pincers (32) of cutting off steel band and the cast-cutting saw (33) of finishing Pipe Cutting work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101404671A CN100549487C (en) | 2006-10-09 | 2006-10-09 | A kind of method and apparatus of making the steel-plastic composite pipe of coiling and molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101404671A CN100549487C (en) | 2006-10-09 | 2006-10-09 | A kind of method and apparatus of making the steel-plastic composite pipe of coiling and molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1924419A true CN1924419A (en) | 2007-03-07 |
| CN100549487C CN100549487C (en) | 2009-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101404671A Expired - Fee Related CN100549487C (en) | 2006-10-09 | 2006-10-09 | A kind of method and apparatus of making the steel-plastic composite pipe of coiling and molding |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102311019A (en) * | 2010-07-09 | 2012-01-11 | 肖玉光 | Steel-plastic composite winding pipe winding machine |
| CN102825807A (en) * | 2012-05-04 | 2012-12-19 | 何军 | Steel-plastic composite molding structure wall tube molding device and its molding technology |
| CN111336906A (en) * | 2020-05-20 | 2020-06-26 | 广东电网有限责任公司东莞供电局 | Deformation measuring device in power pipeline |
-
2006
- 2006-10-09 CN CNB2006101404671A patent/CN100549487C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102311019A (en) * | 2010-07-09 | 2012-01-11 | 肖玉光 | Steel-plastic composite winding pipe winding machine |
| CN102825807A (en) * | 2012-05-04 | 2012-12-19 | 何军 | Steel-plastic composite molding structure wall tube molding device and its molding technology |
| CN102825807B (en) * | 2012-05-04 | 2015-02-25 | 何军 | Steel-plastic composite molding structure wall tube molding device and its molding technology |
| CN111336906A (en) * | 2020-05-20 | 2020-06-26 | 广东电网有限责任公司东莞供电局 | Deformation measuring device in power pipeline |
| CN111336906B (en) * | 2020-05-20 | 2020-08-14 | 广东电网有限责任公司东莞供电局 | Deformation measuring device in power pipeline |
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| Publication number | Publication date |
|---|---|
| CN100549487C (en) | 2009-10-14 |
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Address after: 150090, room 26, building 180, 234 Hongqi Avenue, Nangang District, Heilongjiang, Harbin Patentee after: Harbin Sidawei Pipeline Technology Co. Ltd. Address before: 150090, room 26, building 180, 234 Hongqi Avenue, Nangang District, Heilongjiang, Harbin Patentee before: Haerbin Sidawei Machinery Manufacturing Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20091014 Termination date: 20201009 |