CN103072801B - The method of calculating of a kind of sealing-tape machine doctor blade device and scraper and adhesive tape thrust - Google Patents
The method of calculating of a kind of sealing-tape machine doctor blade device and scraper and adhesive tape thrust Download PDFInfo
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- CN103072801B CN103072801B CN201310027857.8A CN201310027857A CN103072801B CN 103072801 B CN103072801 B CN 103072801B CN 201310027857 A CN201310027857 A CN 201310027857A CN 103072801 B CN103072801 B CN 103072801B
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- scraper
- adhesive tape
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Abstract
The present invention relates to the method for calculating of a kind of sealing-tape machine doctor blade device and scraper and adhesive tape thrust, comprise discharge roll (1), bend pulley (5) and adhesive tape (11), adhesive tape (11), around discharge roll (1) and bend pulley (5) cycle rotation under external force, is characterized in that: the adhesive tape (11) of unsettled section is arranged the optimal compression power that thrust lever regulate parts realize between scraper (7) and adhesive tape (11) between discharge roll (1) and bend pulley (5).The present invention adopts doctor blade device first on the adhesive tape of delivering concrete, by the control of thrust between scraper and adhesive tape, the concrete water mud on adhesive tape and sandstone are sticked to after can fully striking off discharging, continus convergence sealing-tape machine can be applied effectively in concrete conveyance field, drastically increase engineering construction speed.
Description
Technical field
The present invention relates to the cleaning plant of adhesive tape in a kind of Belt transport equipment, especially relate to a kind of sealing-tape machine doctor blade device of delivering concrete.
Background technology
The application of continus convergence sealing-tape machine in transmitting bulk material field is very extensive.Carry in the application of common loose unpacked material, such as ore, coal, sandstone, cement, chemical etc., need during discharging to use swabbing pig to be cleaned by the material still sticked on tape surface after discharging, avoid material to trickle down the loss of contaminated environment and institute's convey materials.Carrying in the concrete application be made up of main components such as cement wash, sandstone aggregates, because cement wash has the characteristic of solidifying, if can not it be removed from tape surface in time, serious harm will be produced.First, cement wash and some tiny sandstone can solidify tape surface is air-dry, and form a lot of attachment, these attachments have certain corrosive property can cause adhesive tape quick aging, shortens its service life.And when the attachment solidified is more, the resistance that can increase when sealing-tape machine runs causes running freely, and sealing-tape machine can be caused time serious to run.Secondly, do not remove clean water mud and can trickle down incessantly and be deposited near emptying point, after solidifying, be difficult to cleaning.But the cement wash of mucus shape has very strong viscosity compared with common loose unpacked material, can carry tiny sandstone secretly and stick to tape surface after discharging, existing swabbing pig is difficult to it fully to remove from adhesive tape.
If can not remove and totally will produce very large harmfulness sticking to the cement wash of tape surface and sandstone, and there is very strong viscosity due to cement wash, being difficult to fully be removed when not damaging adhesive tape.This difficult problem limits the application of continus convergence sealing-tape machine in concrete conveyance field.
As shown in Figure 1, Chinese patent Double-scraper scavenging machine (CN2255419Y) is a kind of swabbing pig commonly used the most, the rubber elastomer 26 that this swabbing pig has fixed mount 21, bolt regulating device 22, beam seat 23, crossbeam 25, up and down both sides are all equipped with metal sheet, on the upside of rubber elastomer 26, blade holder 27 is all equipped with at the two ends of metal sheet, and scraper plate 28 is arranged on the end of each blade holder 27.Double-scraper all realizes cleaning material with travelling apron cylinder 210 circumference material contact.
But this Double-scraper scavenging machine is not suitable for strikes off cement wash in the sealing-tape machine of delivering concrete, there is following technological deficiency.
1, this Double-scraper scavenging machine is applicable to the cleaning of common loose unpacked material, does not need there is very large thrust between scraper plate 28 and adhesive tape 211 when cleaning common bulk cargo material, just the material be bonded on adhesive tape can be removed clean.And in the sealing-tape machine of delivering concrete, because cement wash is mucus shape, and have very strong viscosity, needing to have very large thrust between scraper plate 28 and adhesive tape 211 could by its complete scraped clean.Thrust between the scraper plate 28 that can apply in this Double-scraper scavenging machine and adhesive tape 211 is relatively little, and scraper plate 28 is pressed on adhesive tape 211 covers travelling apron cylinder 210 entity place, adhesive tape 211 can not Free Transform, if thrust comparatively conference by adhesive tape scratch.So this Double-scraper scavenging machine is not suitable for strike off concrete water mud in the sealing-tape machine of delivering concrete.
2, after adjusting bolt regulating device 22 in this Double-scraper scavenging machine, in sealing-tape machine operational process, only rely on the elasticity of rubber elastomer to regulate thrust, and the elasticity of rubber elastomer is very little, setting range is very narrow, and the thrust variation range that can regulate is very little.And in the sealing-tape machine of delivering concrete, if the thrust between scraper plate 28 and adhesive tape is less than normal, then cannot by cement wash and sandstone scraped clean.If instead thrust is excessive, then easy by adhesive tape 211 scratch.Adhesive tape 211 can produce the situations such as shake in operational process, so require that the thrust between scraper plate 28 and adhesive tape 211 has larger setting range.So this Double-scraper scavenging machine is not suitable for strike off concrete water mud in the sealing-tape machine of delivering concrete.
3, the elastic deformation because of the regulated quantity and rubber elastomer 26 that have bolt regulating device 22 of the thrust between scraper plate 28 and adhesive tape 211 is determined in this Double-scraper scavenging machine, scraper plate 28 thrust caused by these factors all cannot accurately calculate, so the thrust between scraper plate 28 and adhesive tape 211 cannot be controlled quantitatively, be unfavorable for statistics and quantitative analysis thrust size and scraping effect and the relation between the adhesive tape life-span.
Summary of the invention
The present invention devises the method for calculating of a kind of sealing-tape machine doctor blade device and scraper and adhesive tape thrust, its technical matters solved is that the large not and thrust size of thrust between existing swabbing pig scraper plate and adhesive tape cannot carry out calculating and regulating, and is not suitable for the sealing-tape machine of delivering concrete.
In order to solve the technical matters of above-mentioned existence, present invention employs following scheme:
A kind of sealing-tape machine doctor blade device, comprise discharge roll (1), bend pulley (5) and adhesive tape (11), adhesive tape (11), around discharge roll (1) and bend pulley (5) cycle rotation under external force, the adhesive tape (11) of unsettled section is arranged the optimal compression power that thrust lever regulate parts realize between scraper (7) and adhesive tape (11) between discharge roll (1) and bend pulley (5).
Further, thrust lever regulate parts comprise hinge pin (2), connecting rod (4), scraper (7), doctor blade holder (9), spring (6) and adjustable handle (12), one end of connecting rod (4) is hinged by described hinge pin (2) and sealing-tape machine truss, and the other end of connecting rod (4) is also connected with sealing-tape machine truss by spring (6) and adjustable handle (12); Scraper (7) is arranged on doctor blade holder (9), and doctor blade holder (9) is fixed on connecting rod (4).
Further, the thrust size between scraper (7) from adhesive tape (11) is by selecting the different setting height(from bottom) of adjustable handle (12) to realize, wherein, handle bearing (13) and sealing-tape machine truss are rigidly connected, and it is made the fixed orifice inserted for adjustable handle, adjustable handle (12) is inserted in the fixed orifice of handle bearing (13), spring (6) upper end is arranged in the spring mounting hole (123) of adjustable handle lower end, adjustable handle (12) differing heights place is provided with multiple mounting hole for bayonet lock (122) (121), the mounting hole (121) that bayonet lock (122) is arranged on the adjustable handle of handle bearing (13) top is interior also by handle bearing (13) supporting and location, thus make adjustable handle (12) be suspended on handle bearing (13), by selecting to load bayonet lock (122) in the bayonet lock mounting hole (121) of differing heights, change the height and position of adjustable handle, the deflection of spring thus change and control the thrust between scraper (7) and adhesive tape (11).
Further, scraper (7) clamps and is fixed between doctor blade holder (9) and scraper pressing plate (8), and doctor blade holder (9) and scraper pressing plate (8) mode of being bolted are fixed.
Further, also comprise flexible fluid-directing plate (10), flexible fluid-directing plate (10) is fixed on doctor blade holder (9).
Further, also comprise deflecting plate (3), deflecting plate (3) upper end receives the material from flexible fluid-directing plate (10), and lower road conveying flow process delivered to by material by deflecting plate (3).
Further, deflecting plate (3) is polylith, and polylith deflecting plate (3) is connected in series.
Further, the material of described sealing-tape machine doctor blade device transport is cement concrete.
Further, the material of described scraper (7) is hard alloy steel.
Sealing-tape machine doctor blade device carries out a method of calculating for scraper and adhesive tape thrust, comprises the following steps: by the deflection Δ L of measuring spring, can calculate the elastic force F of spring according to Hook's law:
F=k Δ L (wherein k-the elastic coefficient)
Next records adhesive tape (11) and the tilt angle alpha of horizontal surface, measures the horizontal throw L of hinge pin (2) distance of shaft centers scraper (4) and adhesive tape (11) contact point
3, measure the distance L of hinge pin (2) distance of shaft centers scraper (7) and adhesive tape (11) contact point
aB, the horizontal throw L in hanging point and hinge pin (2) axle center under measuring spring
1, calculate the weight G of assembly and the horizontal throw L in distance of centre of gravity hinge pin (2) axle center such as connecting rod (4), scraper (7), doctor blade holder (8), flexible fluid-directing plate (10) and tie bolt
2.Because the tension force of adhesive tape is relatively large, ignore the small deformation of adhesive tape under the effect of scraper thrust, think that the direction of thrust between scraper and adhesive tape is perpendicular to adhesive tape, L
aCfor hinge pin (2) axle center is to the vertical distance of thrust antagonistic force P, then:
β=arccos(L
3/L
AB)
L
AC=L
AB·cos(β-α)
Ignore spring issuable crooked, according to the equation of static equilibrium of theoretical mechanics, the thrust P between scraper (7) and adhesive tape (11) can be calculated:
P=（F·L
1-G·L
2）/L
AC
The size of thrust between scraper (7) and adhesive tape (11) can be controlled quantitatively according to above-mentioned formula and parameter.
The method of calculating of this sealing-tape machine doctor blade device and scraper thereof and adhesive tape thrust, compared with Classical adhesive tape scraper device, has following beneficial effect:
(1) the present invention adopts doctor blade device first on the adhesive tape of delivering concrete, by the control of thrust between scraper and adhesive tape, the concrete water mud on adhesive tape and sandstone are sticked to after can fully striking off discharging, continus convergence sealing-tape machine can be applied effectively in concrete conveyance field, drastically increase engineering construction speed.
(2) in the present invention, scraper is flexible suspension system, and scraper is pressed on unsettled section of adhesive tape, can fit well between scraper and adhesive tape, and can not coming to nothing because of the shake of adhesive tape, it is unclean to cause striking off.Scraper is pressed on unsettled section of adhesive tape, and adhesive tape can be out of shape backward under scraper pressure effect, avoids and damages adhesive tape because thrust is excessive.
(3) the present invention accurately can calculate the elastic force of spring by the deflection of measuring spring, the thrust between scraper and adhesive tape can be calculated again according to data such as the lever ratio of connecting rod, the angles of inclination of adhesive tape, thus accurately can control the size of thrust between scraper and adhesive tape, and can quantitative analysis thrust size and scraping effect and the relation between the adhesive tape life-span.
(4) the present invention uses the scraper of extreme hardness, improves the resistance to abrasion of scraper, increases its service life.
Accompanying drawing explanation
Fig. 1: a kind of structural representation of swabbing pig in prior art;
Fig. 2: the birds-eye view of sealing-tape machine doctor blade device of the present invention;
In Fig. 3: Fig. 2, A-A is to cutaway view;
I place partial enlargement structural representation in Fig. 4: Fig. 3;
In Fig. 5: Fig. 2, B-B is to cutaway view;
Fig. 6: the Mechanics Calculation schematic diagram of sealing-tape machine doctor blade device of the present invention;
II place's close-up schematic view in Fig. 7: Fig. 6.
Description of reference numerals:
21-fixed mount; 22-bolt regulating device; 23-beam seat; 24-bolt; 25-crossbeam; 26-rubber elastomer; 27-blade holder; 28-scraper plate; 29-bolt; 210-travelling apron cylinder; 211-adhesive tape;
1-discharge roll; 2-hinge pin; 3-deflecting plate; 4-connecting rod; 5-bend pulley; 6-spring; 7-scraper; 8-scraper pressing plate; 9-doctor blade holder; 10-flexible fluid-directing plate; 11-adhesive tape; 12-adjustable handle; 121-bayonet lock mounting hole; 122-bayonet lock; 123-spring mounting hole; 13-handle bearing.
Detailed description of the invention
Below in conjunction with Fig. 2 to Fig. 7, the present invention will be further described:
As shown in Figure 2, the length of scraper 7 is not less than the dispersion of distribution of cement wash on adhesive tape, and scraper 7 has a straight seamed edge at least.The two ends of doctor blade holder 9 are bolted on two connecting rods 4, and two connecting rods 4 and doctor blade holder 9 are in " work " font structure.
As shown in Figure 3, a kind of sealing-tape machine doctor blade device, the material of sealing-tape machine doctor blade device transport is cement concrete.It comprises discharge roll 1, bend pulley 5 and adhesive tape 11, adhesive tape 11, around discharge roll 1 and bend pulley 5 cycle rotation under external force, the adhesive tape 11 of unsettled section is arranged the optimal compression power that thrust lever regulate parts realize between scraper 7 and adhesive tape 11 between discharge roll 1 and bend pulley 5.Thrust lever regulate parts comprise hinge pin 2, connecting rod 4, scraper 7, doctor blade holder 9, spring 6 and adjustable handle 12, one end of connecting rod 4 is hinged with sealing-tape machine truss by described hinge pin 2, connecting rod 4 can rotate around hinge pin 2, and the other end of connecting rod 4 is also connected with sealing-tape machine truss by spring 6 and adjustable handle 12; The material of scraper 7 is hard alloy steel.Scraper 7 is arranged on doctor blade holder 9, and doctor blade holder 9 is fixed on connecting rod 4.
Deflecting plate 3 upper end receives the material from flexible fluid-directing plate 10, and material is delivered to regenerative apparatus by deflecting plate 3.Deflecting plate 3 is polylith, and polylith deflecting plate 3 is connected in series.
As shown in Figure 4, the section of doctor blade holder 9 is a L shape, and it is as the attachment face of scraper 7.Specifically, scraper 7 clamps and is fixed between doctor blade holder 9 and scraper pressing plate 8, doctor blade holder 9 has a standing groove, is placed wherein one end of scraper 7, and to push down with scraper pressing plate 8, and then doctor blade holder 9 and scraper pressing plate 8 are bolted mode and are fixed.Another attachment face of doctor blade holder 9 is fixedly connected with flexible fluid-directing plate 10, and flexible fluid-directing plate 10 and doctor blade holder 9 are fixed by bolt, and can reinforce by pad.
As shown in Figure 5, the thrust size between scraper from adhesive tape is realized by the setting height(from bottom) selecting adjustable handle 12 different.Handle bearing 13 having a fixed orifice inserts wherein for adjustable handle 12, and adjustable handle 12 is undertaken spacing and fixing by bayonet lock 122 mounted thereto.Handle bearing 13 and sealing-tape machine truss are rigidly connected, and the mode that can be bolted is fixed.The upper end of spring 6 is arranged in the hole 123 of adjustable handle 12 lower end, adjustable handle 12 differing heights is provided with multiple mounting hole 121 for installing bayonet lock 122, the mounting hole of differing heights is selected to load bayonet lock 122, change the high and low position of adjustable handle, change the deflection of spring 6, thus change the thrust controlled between scraper 7 and adhesive tape 11.The Kong Weiyue that bayonet lock 122 loads is low, and the position of adjustable handle 12 is higher, and the thrust be applied between scraper 7 and adhesive tape 11 is larger; Otherwise, then less.
The principle of work of sealing-tape machine doctor blade device of the present invention is as follows: by the height and position regulating the mounting hole site of adjustable handle 12 to change adjustable handle 12, change the elongation of spring 6, change the elastic force of spring 6, thus the thrust controlled between scraper and adhesive tape is a desired value, make scraper both effectively can strike off the concrete water mud sticked on adhesive tape, thrust can be avoided again too large thus damage adhesive tape.The thrust between scraper and adhesive tape can be calculated according to the data such as elongation, the lever ratio of connecting rod, the angle of inclination of adhesive tape of spring.
As shown in Figure 6 and Figure 7, a kind of sealing-tape machine doctor blade device carries out the method for calculating of scraper and adhesive tape thrust, comprise the following steps: by the deflection Δ L of measuring spring, the elastic force F:F=k Δ L of spring can be calculated according to Hook's law, wherein k-the elastic coefficient;
Next records adhesive tape 11 and the tilt angle alpha of horizontal surface, measures the horizontal throw L of hinge pin 2 distance of shaft centers scraper 7 and adhesive tape 11 contact point
3, measure the distance L of hinge pin 2 distance of shaft centers scraper 7 and adhesive tape 11 contact point
aB, the horizontal throw L in hanging point and hinge pin 2 axle center under measuring spring
1, calculate the weight G of assembly and the horizontal throw L in distance of centre of gravity hinge pin 2 axle center such as connecting rod 4, scraper 7, doctor blade holder 8, flexible fluid-directing plate 10 and tie bolt
2.Because the tension force of adhesive tape is relatively large, ignore the small deformation of adhesive tape under the effect of scraper thrust, think that the direction of thrust between scraper and adhesive tape is perpendicular to adhesive tape, L
aCfor hinge pin 2 axle center is to the vertical distance of thrust antagonistic force P, then:
β=arccos(L
3/L
AB)
L
AC=L
AB·cos(β-α)
Ignore spring issuable crooked, according to the equation of static equilibrium of theoretical mechanics, the thrust P:P=(FL between scraper 7 and adhesive tape 11 can be calculated
1-GL
2)/L
aC.The size of thrust between scraper 7 and adhesive tape 11 can be controlled quantitatively according to above-mentioned formula and parameter.
Above by reference to the accompanying drawings to invention has been exemplary description; obvious realization of the present invention is not subject to the restrictions described above; as long as have employed the various improvement that method of the present invention is conceived and technical scheme is carried out; or design of the present invention and technical scheme directly applied to other occasion, all in protection scope of the present invention without to improve.
Claims (6)
1. a sealing-tape machine doctor blade device, comprise discharge roll (1), bend pulley (5) and adhesive tape (11), adhesive tape (11), around discharge roll (1) and bend pulley (5) cycle rotation under external force, is characterized in that: the adhesive tape (11) of unsettled section is arranged thrust lever regulate parts between discharge roll (1) and bend pulley (5) and realize scraper (7) and adhesive tape (11) optimal compression power, thrust lever regulate parts comprise hinge pin (2), connecting rod (4), scraper (7), doctor blade holder (9), spring (6) and adjustable handle (12), one end of connecting rod (4) is hinged by described hinge pin (2) and sealing-tape machine truss, and the other end of connecting rod (4) is also connected with sealing-tape machine truss by spring (6), scraper (7) is arranged on doctor blade holder (9), and doctor blade holder (9) is fixed on connecting rod (4), thrust size between scraper (7) from adhesive tape (11) is by selecting the different setting height(from bottom) of adjustable handle (12) to realize, wherein, handle bearing (13) and sealing-tape machine truss are rigidly connected, and it is made the fixed orifice inserted for adjustable handle, adjustable handle (12) is inserted in the fixed orifice of handle bearing (13), spring (6) upper end is arranged in the spring mounting hole (123) of adjustable handle lower end, adjustable handle (12) differing heights place is provided with multiple mounting hole for bayonet lock (122) (121), the mounting hole (121) that bayonet lock (122) is arranged on the adjustable handle of handle bearing (13) top is interior also by handle bearing (13) supporting and location, thus make adjustable handle (12) be suspended on handle bearing (13), by selecting to load bayonet lock (122) in the bayonet lock mounting hole (121) of differing heights, change the height and position of adjustable handle, the deflection of spring thus change and control the thrust between scraper (7) and adhesive tape (11), scraper (7) clamps and is fixed between doctor blade holder (9) and scraper pressing plate (8), and doctor blade holder (9) and scraper pressing plate (8) are fixed by screw connection manner, also comprise flexible fluid-directing plate (10), flexible fluid-directing plate (10) is fixed on doctor blade holder (9), the section of doctor blade holder (9) is a L shape, and it is as the attachment face of scraper (7), another attachment face of doctor blade holder (9) is fixedly connected with flexible fluid-directing plate (10).
2. sealing-tape machine doctor blade device according to claim 1, is characterized in that: also comprise deflecting plate (3), and deflecting plate (3) upper end receives the material from flexible fluid-directing plate (10), and lower road conveying flow process delivered to by material by deflecting plate (3).
3. sealing-tape machine doctor blade device according to claim 2, it is characterized in that: deflecting plate (3) is polylith, polylith deflecting plate (3) is connected in series.
4. according to sealing-tape machine doctor blade device described in any one in claims 1 to 3, it is characterized in that: the material of described sealing-tape machine doctor blade device transport is cement concrete.
5. according to sealing-tape machine doctor blade device described in any one in claims 1 to 3, it is characterized in that: the material of described scraper (7) is hard alloy steel.
6. the method for calculating using any one sealing-tape machine doctor blade device of claim 1 to 5 to carry out scraper and adhesive tape thrust, comprise the following steps: by the deflection of measuring spring, the elastic force of spring can be calculated according to Hook's law, next records the angle of inclination of adhesive tape (11) and horizontal surface, measure the horizontal throw of hinge pin (2) distance of shaft centers scraper (7) and adhesive tape (11) contact point, measure the distance of hinge pin (2) distance of shaft centers scraper (7) and adhesive tape (11) contact point, the horizontal throw in hanging point and hinge pin (2) axle center under measuring spring, calculate connecting rod (4), scraper (7), doctor blade holder (9), the weight G of flexible fluid-directing plate (10) and tie bolt assembly and the horizontal throw in distance of centre of gravity hinge pin (2) axle center, finally according to the equation of static equilibrium of theoretical mechanics, the thrust between scraper (7) and adhesive tape (11) can be calculated, thus accurately can control the size of thrust between scraper (7) and adhesive tape (11).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310027857.8A CN103072801B (en) | 2013-01-25 | 2013-01-25 | The method of calculating of a kind of sealing-tape machine doctor blade device and scraper and adhesive tape thrust |
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|---|---|---|---|
| CN201310027857.8A CN103072801B (en) | 2013-01-25 | 2013-01-25 | The method of calculating of a kind of sealing-tape machine doctor blade device and scraper and adhesive tape thrust |
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| CN106621502B (en) * | 2016-10-19 | 2019-01-04 | 核工业烟台同兴实业集团有限公司 | A kind of turnover panel limit water receiving scraper device for belt filter press |
| CN108826957A (en) * | 2018-06-14 | 2018-11-16 | 江苏搏斯威化工设备工程有限公司 | Roller scraping blade drying machine air-cylinder type clamps blade construction |
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|---|---|---|---|---|
| CN101028891A (en) * | 2007-04-10 | 2007-09-05 | 三一重工股份有限公司 | Conveyer and conveyer-belt sweeper with adjusting scraper angle |
| CN202337557U (en) * | 2011-11-17 | 2012-07-18 | 衡阳运输机械有限公司 | Adjustable spring nonloaded cleanser |
| CN202429679U (en) * | 2012-02-09 | 2012-09-12 | 中煤科工集团武汉设计研究院 | Turnabout drum cleaner |
| CN203064715U (en) * | 2013-01-25 | 2013-07-17 | 杭州国电大力机电工程有限公司 | Tape machine scraper device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3877184B2 (en) * | 1996-11-19 | 2007-02-07 | ライト工業株式会社 | Scraper device for belt conveyor |
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2013
- 2013-01-25 CN CN201310027857.8A patent/CN103072801B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101028891A (en) * | 2007-04-10 | 2007-09-05 | 三一重工股份有限公司 | Conveyer and conveyer-belt sweeper with adjusting scraper angle |
| CN202337557U (en) * | 2011-11-17 | 2012-07-18 | 衡阳运输机械有限公司 | Adjustable spring nonloaded cleanser |
| CN202429679U (en) * | 2012-02-09 | 2012-09-12 | 中煤科工集团武汉设计研究院 | Turnabout drum cleaner |
| CN203064715U (en) * | 2013-01-25 | 2013-07-17 | 杭州国电大力机电工程有限公司 | Tape machine scraper device |
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