CN101870139A - Grouting process of thin-wall fine hollow type pipe and stirrers thereof - Google Patents
Grouting process of thin-wall fine hollow type pipe and stirrers thereof Download PDFInfo
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- CN101870139A CN101870139A CN 201010181818 CN201010181818A CN101870139A CN 101870139 A CN101870139 A CN 101870139A CN 201010181818 CN201010181818 CN 201010181818 CN 201010181818 A CN201010181818 A CN 201010181818A CN 101870139 A CN101870139 A CN 101870139A
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Abstract
The invention relates to a grouting process of a thin-wall fine hollow type pipe and stirrers thereof. The grouting process comprises the following steps of: putting cement, sand and water into a first-stage stirrer proportionally, mixing into concrete, starting a current-limiting anti-blocking air cylinder after stirring evenly by the first-stage stirrer, opening an outlet of a concrete flow passage, delivering the concrete into a second-stage stirrer, pouring the thin-wall fine hollow type pipe by the concrete which is stirred and homogenized for the second time and flows out of a pouring port of the second-stage stirrer, pouring the pouring component of the hollow type pipe in an oblique state along the inner wall of the hollow type pipe slowly, eliminating air in the hollow type pipe in time and drying and solidifying or baking, drying and solidifying the concrete poured into the hollow type pipe naturally after pouring fully. The invention solves the problems of easy occurrence of wrinkles and cracks at the pipe wall of a thin-wall pipe and cracking and damage of the pipe in the pipe bending process of a traditional stainless steel thin-wall type pipe, and has the characteristics of reasonable process, convenient execution, easy manufacture, low cost, high yield of a product, environmental protection and energy saving.
Description
Technical field the present invention relates to the grouting process and the mixer thereof of the tiny hollow type pipe of a kind of thin-walled, belongs to Thin Stainless Steel wall type tube product technical field.
A large amount of at present the grouting process of background technology at the tiny hollow type pipe of using of thin-walled, it is the filler that adopts glue, rosin and so in sand or perfusion in the inner filling of Thin Stainless Steel wall type tube, then the stainless steel thin-wall pipe after filling is carried out the mechanical bend moulding, manufacture products such as clothes hanger, towel rack, because the filler of stainless steel thin-wall pipe inside is a loose condition (of surface), so when the mechanical bend moulding, wrinkle, crackle and the damaged phenomenon of pipe cracking appear in stainless steel thin-wall pipe easily, make product rejection rate higher, cost increases.
Summary of the invention the invention provides a kind of grouting process and mixer thereof of the tiny hollow type pipe of a kind of thin-walled of novelty, employing is poured into mortar and is strengthened structure and technology in the Thin Stainless Steel wall type tube, wrinkle, crackle and the damaged purpose of pipe cracking no longer occur with the tube wall that is implemented in Thin Stainless Steel wall type tube thin-walled tube in the bend pipe process.
The technical solution used in the present invention is:
The grouting process of the tiny hollow type pipe of a kind of thin-walled; The grouting process step of the tiny hollow type pipe of thin-walled is: with cement; Sand; Water or cement; Sand; Aggregate chips; The agitator A that water is put into first order mixer in proportion carries out mixing into for the first time the concrete of shape of flowing; In the concrete flow passage exit of first order mixer one current limliting blockingproof cylinder is set; After treating that first order mixer stirs; The current limliting blockingproof cylinder activates to open the concrete flow passage outlet; Concrete enters among the agitator B of second level mixer by the concrete flow passage outlet; Then second level mixer begins to carry out stirring the second time homogeneous; The mobile shape concrete that stir behind the homogeneous second time flows out from the perfusing hole of second level mixer outlet flow; The tiny hollow type pipe of thin-walled is poured into; During perfusion; Perfusion part hollow type pipe is wanted inclined perfusion; Second level mixer pours into while stirring; And in time get rid of air in the hollow type pipe; The concrete fluid of mobile shape should slowly pour into along the hollow type inside pipe wall; Pour into to good in the gap mode; Until fill whole hollow type pipe inner space, then the concrete that pours in the hollow type pipe is carried out air dry sclerosis or the dry sclerosis of baking.
Described mobile shape concrete, the mixed proportion of its cement, sand, water or cement, sand, aggregate chips, water is:
A, when hollow type pipe diameter that concrete will pour into be below 10 millimeters the time: the mixed proportion of cement, sand, water is: 2: 3: 2, the sand grains diameter should be less than 0.3 millimeter;
B, when the hollow type pipe diameter that will pour into when concrete is the 10-15 millimeter: the mixed proportion of cement, sand, water is: 2: 3: 2;
C, when hollow type pipe diameter that concrete will pour into be more than 15 millimeters the time: the mixed proportion of cement, sand, water, aggregate chips is: 2: 3: 2: 0.5.
The current limliting blockingproof cylinder is controlled by the time relay, and 30 seconds are opened the concrete flow passage outlet once at every interval, and the opening time was 1 second.
The concrete flow passage outlet aperture of first order mixer is 6 millimeters, wall thickness 3-5 millimeter.
The perfusing hole aperture of second level mixer outlet flow is 4 millimeters, wall thickness 3-5 millimeter.
Can add the concrete setting agent in the concrete of described mobile shape.
Described cement is early-strength cement.
When the diameter of hollow type pipe is that 10-15 millimeter, length are more than 1 meter the time, concrete perfusion should divide to be carried out for 2-3 time.
The mixer of the tiny hollow type pipe grouting of a kind of thin-walled, described mixer by: first order mixer and second level mixer are constituted, first order mixer comprises: agitator A, motor A, shaft A, stirring blade, the current limliting blockingproof cylinder, the concrete flow passage export structure, second level mixer, comprise: agitator B, motor B, shaft B, the perfusing hole structure, agitator A is installed on the rack platform, in agitator A bottom is motor A, shaft A is installed in agitator A, stirring blade, agitator A edge is equipped with the current limliting blockingproof cylinder, the concrete flow passage outlet, in concrete flow passage outlet bottom agitator B is installed, agitator B and rack platform are connected and fixed, agitator B bottom is equipped with motor B, and shaft B and perfusing hole are installed among the agitator B.
The current limliting blockingproof cylinder is the pneumatic piston cylinder structure, mainly be made of cylinder body and pneumatic piston rod, cylinder body is fixed, and the closing door that is driven the concrete flow passage outlet by pneumatic piston rod is opened or closed, the concrete flow passage outlet is the open type structure, is provided with a closing door in concrete flow passage outlet inboard.
Beneficial effect of the present invention is:
Owing to adopted the grouting process and the mixer thereof of the tiny hollow type pipe of a kind of thin-walled of the present invention, wrinkle, crackle and the damaged problem of pipe cracking appear in tube wall easily that solved existing Thin Stainless Steel wall type tube thin-walled tube in the bend pipe process, the grouting process of the tiny hollow type pipe of a kind of thin-walled of the present invention have technology rationally, implement conveniently, cost easy to manufacture is low, finished product rate height, not only environmental protection but also energy-conservation characteristics.
Description of drawings
Fig. 1: the perspective view one that is the concrete mixer of the tiny hollow type pipe grouting of a kind of thin-walled of the present invention usefulness;
Fig. 2: the perspective view two that is the concrete mixer of the tiny hollow type pipe grouting of a kind of thin-walled of the present invention usefulness;
Fig. 3: the perspective view three that is the concrete mixer of the tiny hollow type pipe grouting of a kind of thin-walled of the present invention usefulness;
Fig. 4: the local amplification assumption diagram that is a-quadrant among Fig. 3.
Among Fig. 1: 1, agitator A 2, agitator B 3, rack platform
4, motor B 5, motor A 6, shaft A 7, stirring blade
8, shaft B 9, perfusing hole
Among Fig. 2: 5, motor A
Among Fig. 4: 10, current limliting blockingproof cylinder 11, concrete flow passage outlet
The specific embodiment
First order mixer comprises: agitator A1, motor A5, shaft A6, stirring blade 7, current limliting blockingproof cylinder 10, concrete flow passage export 11 structures.
Second level mixer comprises: agitator B2, motor B4, shaft B8, perfusing hole 9 structures.
The grouting process of the tiny hollow type pipe of a kind of thin-walled; The grouting process step of the tiny hollow type pipe of thin-walled is: with cement; Sand; Water or cement; Sand; Aggregate chips; The agitator A1 that water is put into first order mixer in proportion carries out mixing into for the first time the concrete of shape of flowing; Export 11 places at the concrete flow passage of first order mixer one current limliting blockingproof cylinder 10 is set; After treating that first order mixer stirs; Current limliting blockingproof cylinder 10 activates to open concrete flow passage outlet 11; Concrete enters among the agitator B2 of second level mixer by concrete flow passage outlet 11; Current limliting blockingproof cylinder 10 is controlled by the time relay; 30 seconds are opened concrete flow passage outlet 11 once at every interval; Opening time was 1 second; Current limliting blockingproof cylinder 10 closed concrete runner exits 11; Then second level mixer begins to carry out stirring the second time homogeneous; The mobile shape concrete that stir behind the homogeneous second time flows out from the perfusing hole 9 of second level mixer outlet flow; The tiny hollow type pipe of thin-walled is poured into; During perfusion; Perfusion part hollow type pipe is wanted inclined perfusion; Second level mixer pours into while stirring; And in time get rid of air in the hollow type pipe; The concrete fluid of the mobile shape of pasty state should slowly pour into along the hollow type inside pipe wall; Pour into to good in the gap mode; Until fill whole hollow type pipe inner space, then the concrete that pours in the hollow type pipe is carried out air dry sclerosis or the dry sclerosis of baking.
Described mobile shape concrete, the mixed proportion of its cement, sand, water or cement, sand, aggregate chips, water is:
A, when hollow type pipe diameter that concrete will pour into be below 10 millimeters the time: the mixed proportion of cement, sand, water is: 2: 3: 2, the sand grains diameter should be less than 0.3 millimeter;
B, when the hollow type pipe diameter that will pour into when concrete is the 10-15 millimeter: the mixed proportion of cement, sand, water is: 2: 3: 2, the sand grains diameter also can be used below the 0.3mm greater than 0.3 millimeter;
C, when hollow type pipe diameter that concrete will pour into be more than 15 millimeters the time: the mixed proportion of cement, sand, water, aggregate chips is: 2: 3: 2: a little, the sand grains diameter also can be used below the 0.3mm greater than 0.3 millimeter.
Current limliting blockingproof cylinder 10 is by time relay control, and 30 seconds are opened concrete flow passage outlet (11) once at every interval, and the opening time was 1 second.
It is 6 millimeters that the concrete flow passage of first order mixer exports 11 apertures, wall thickness 3-5 millimeter.
Perfusing hole 9 apertures of second level mixer outlet flow are 4 millimeters, wall thickness 3-5 millimeter.
Can add the concrete setting agent in the concrete of described mobile shape.
Described cement is early-strength cement.
When the diameter of hollow type pipe is that 10-15 millimeter, length are more than 1 meter the time, concrete perfusion should divide to be carried out for 2-3 time.
The mixer of the tiny hollow type pipe grouting of a kind of thin-walled, described mixer by: first order mixer and second level mixer are constituted, first order mixer comprises: agitator A1, motor A5, shaft A6, stirring blade 7, current limliting blockingproof cylinder 10, concrete flow passage exports 11 structures, second level mixer, comprise: agitator B2, motor B4, shaft B8, perfusing hole 9 structures, agitator A1 is installed on the rack platform 3, in agitator A1 bottom is motor A5, shaft A6 is installed in agitator A1, stirring blade 7, agitator A1 edge is equipped with current limliting blockingproof cylinder 10, concrete flow passage outlet 11, export 11 bottoms at concrete flow passage agitator B2 is installed, agitator B2 and rack platform 3 are connected and fixed, agitator B2 bottom is equipped with motor B4, and shaft B8 and perfusing hole 9 are installed among the agitator B2.
Current limliting blockingproof cylinder 10 is the pneumatic piston cylinder structure, mainly constitute by cylinder body and pneumatic piston rod, cylinder body is fixed, the closing door that is driven concrete flow passage outlet 11 by pneumatic piston rod is opened or is closed, concrete flow passage outlet 11 is the open type structure, exports 11 inboards at concrete flow passage and is provided with a closing door.
The tiny hollow type pipe of described thin-walled is meant: diameter is the 8-25 millimeter, and wall thickness is the round or special-shaped hollow steel pipe of 10-100 silk.
Selection one: the following hollow type pipe of ф 10mm: sand is often referred to fine sand for building with below 0.3 mm dia, and cement is the most handy early-strength, it is faster that crystallization rate mainly is subjected to the influence of cement to add coagulating agent, cement, sand, the proportion of water can be done suitable adjustment in actual the use.
Sand is as intensive, cement extenders, and the two is in conjunction with just playing effect.The mobile row of sand is bad, and buoyancy is poor, and cement buoyancy is good, flows.
Observe in the first order mixer.The state that their mixture comes out from runner can come out and pasty state gets final product.The explanation sand that can't get out is many, comes out not have husky explanation to be mostly cement.Generally speaking what what many adds, because this scope is than broad, according to the actual conditions actual treatment.Purpose is exactly to allow their mixture reach fluid state, just can reach the perfusion purpose as long as reach fluid state, and water also can multiple spot, and the water multiple spot flows and acts charitably a little, is convenient to perfusion, and three's mixed proportion has certain influence with later crystallization rate.
For the hollow type pipe more than 1 meter once is that perfusion is bad, will be through just finishing whole perfusion several times, water is many in the ratio, and the water in the hollow type pipe is also many naturally, so it wants the water in the hollow type pipe oneself to separate, and therefore once can not finish whole perfusion.With husky post precipitation, water can separate automatically Deng cement, after water outlet, again perfusion once, the strength problem of perfusion back light wall pipe body is matched considering can pour under the successful prerequisite particle to sand, sand follows the proportioning of cement to retrain again.This problem will be according to the rapidoprint of reality and is qualitative.
Selection two: ф 10mm is to ф 15mm hollow type pipe, do not consider intensity, selection can be used selection one scheme, its sand can be used rough sand, rough sand for building, the hollow type bore is a little bigger, and the suitable consumption that can reduce water in water, cement, sand three's ratio can reduce the number of times of perfusion like this.
Selection three: the above hollow type pipe of ф 15mm, hollow type Guan Yueda perfusion is light more, and the sand the inside can add stone or the aggregate chips of a little, can make the intensity of hollow type pipe more solid after having added stone or aggregate chips.But three's state or flow-like.Sand in can reaching the perfusion scope, the thickness of sand, three's ratio to processing speed influential.Cement is influential to the crystallization rate of workpiece with coagulating agent.
Mixer:
First order mixer: be water, cement, sand put in and carry out the stirring first time.Three's mixing object is many inside it, can not directly distribute to the perfusion part.Get final product about first order mixer motor rotating speed 60 commentaries on classics/s.
Second level mixer: the concrete of its inside comes out from first order mixer the inside, and the concrete of its inside is quantitative.So just can distribute to the perfusion part, the perfusion part is poured into.Get final product about the mixer motor rotating speed 80 commentaries on classics/s of the second level.
Could allow first order mixer reach quantitative like this to the concrete in the mixer of the second level? will carry out current limliting to concrete by the outlet of first order mixer so.Here have and want a current-limiting apparatus.
Current-limiting apparatus: cooperate its outlet of time controller with mechanical parts, allow his per minute come out several times, the capacity of the mixture that comes out will prepare with the size of perfusion part, the scope of controller control can 0.01 second to 1 hour, and it can be random in this scope opens or block the outlet of one-level perfusion level to the secondary bottler placer.If workpiece is smallclothes, you control to it by time controller and prepare so, stop in 30 seconds such as opening in 30 seconds in one fen kind, opened in 20 seconds stopped in 40 seconds how passable.The flow of having controlled well has also just been controlled the capacity in the second level mixer cylinder body well, just can control from the come out speed of fluid of second level mixer so.Hour bad perfusion of the bore of hollow type pipe, just mouth has been blocked in case flow is big, just blocked and also poured into not entered, here not that just the mouth of pipe is blocked, certain position of hollow type pipe the inside is blocked also not all right, so the control of flow is to allow fluid slowly go down along tube wall, and the air of the hollow type pipe the inside of in time draining.
Because each area temperature in each different in season, the crystallization rate difference that causes.Can in concrete, add coagulating agent according to the temperature of various places.
With the perfusion of 8 mm dia hollow type pipes is that example is described, and current limliting blockingproof cylinder 10 was blocked through time relay control in 30 seconds, and opened cement in 1 second: sand: the ratio of water is 2: 3: 2.
Concrete flow passage requires: it is 6 millimeters that one-level mixer concrete flow passage exports 11 apertures, wall thickness 3-5 millimeter, if wall is too thick, concrete is blocked easily, and secondary mixer outlet flow perfusing hole 9 apertures are 4 millimeters, wall thickness 3-5 millimeter.
Cement, sand, water are put into agitator A1 in proportion, open motor A5, one-level agitator A1 begins ready-mixed concrete, after waiting to stir, current limliting blockingproof cylinder 10 is opened, and concrete enters agitator B2 by concrete flow passage outlet 11, after 1 second, current limliting blockingproof cylinder 10 blocks concrete flow passage outlet 11, open motor B4, secondary agitator B2 begins the secondary ready-mixed concrete, while stirring perfusion, during perfusion, perfusion part: will tilt certain angle perfusion of hollow type pipe.
Claims (10)
1. the grouting process of the tiny hollow type pipe of thin-walled, it is characterized in that: the grouting process step of the tiny hollow type pipe of thin-walled is: with cement, sand, water or cement, sand, aggregate chips, the agitator A (1) that water is put into first order mixer in proportion carries out mixing for the first time the concrete of the shape that becomes to flow, concrete flow passage outlet (11) at first order mixer locates to be provided with a current limliting blockingproof cylinder (10), treat that first order mixer stirs behind the clock, current limliting blockingproof cylinder (10) activates to open concrete flow passage outlet (11), concrete enters among the agitator B (2) of second level mixer by concrete flow passage outlet (11), then second level mixer begins to carry out stirring the second time homogeneous, the mobile shape concrete that stir behind the homogeneous second time flows out from the perfusing hole (9) of second level mixer outlet flow, the tiny hollow type pipe of thin-walled is poured into, during perfusion, perfusion part hollow type pipe is wanted inclined perfusion, second level mixer pours into while stirring, and in time get rid of air in the hollow type pipe, the concrete fluid of mobile shape should slowly pour into along the hollow type inside pipe wall, pour into to good in the gap mode, until filling whole hollow type pipe inner space, then the concrete that pours in the hollow type pipe is carried out air dry sclerosis or the dry sclerosis of baking.
2. the grouting process of the tiny hollow type pipe of a kind of thin-walled according to claim 1 is characterized in that: described mobile shape concrete, and the mixed proportion of its cement, sand, water or cement, sand, aggregate chips, water is:
A, when hollow type pipe diameter that concrete will pour into be below 10 millimeters the time: the mixed proportion of cement, sand, water is: 2: 3: 2, the sand grains diameter should be less than 0.3 millimeter;
B, when the hollow type pipe diameter that will pour into when concrete is the 10-15 millimeter: the mixed proportion of cement, sand, water is: 2: 3: 2;
C, when hollow type pipe diameter that concrete will pour into be more than 15 millimeters the time: the mixed proportion of cement, sand, water, aggregate chips is: 2: 3: 2: 0.5.
3. the grouting process of the tiny hollow type pipe of a kind of thin-walled according to claim 1 is characterized in that: current limliting blockingproof cylinder (10) is by time relay control, and 30 seconds are opened concrete flow passage outlet (11) once at every interval, and the opening time was 1 second.
4. the grouting process of the tiny hollow type pipe of a kind of thin-walled according to claim 1 is characterized in that: concrete flow passage outlet (11) aperture of first order mixer is 6 millimeters, wall thickness 3-5 millimeter.
5. the grouting process of the tiny hollow type pipe of a kind of thin-walled according to claim 1 is characterized in that: perfusing hole (9) aperture of second level mixer outlet flow is 4 millimeters, wall thickness 3-5 millimeter.
6. the grouting process of the tiny hollow type pipe of a kind of thin-walled according to claim 1 is characterized in that: can add the concrete setting agent in the concrete of described mobile shape.
7. the grouting process of the tiny hollow type pipe of a kind of thin-walled according to claim 1 is characterized in that: described cement is early-strength cement.
8. the grouting process of the tiny hollow type pipe of a kind of thin-walled according to claim 1 is characterized in that: when the diameter of hollow type pipe is that 7-15 millimeter, length are more than 1 meter the time, concrete perfusion should divide to be carried out for 2-3 time.
9. the mixer of the tiny hollow type pipe grouting of a thin-walled, it is characterized in that: described mixer by: first order mixer and second level mixer are constituted, first order mixer comprises: agitator A (1), motor A (5), shaft A (6), stirring blade (7), current limliting blockingproof cylinder (10), concrete flow passage outlet (11) structure, second level mixer, comprise: agitator B (2), motor B (4), shaft B (8), perfusing hole (9) structure, agitator A (1) is installed on the rack platform (3), in agitator A (1) bottom is motor A (5), shaft A (6) is installed in agitator A (1), stirring blade (7), agitator A (1) edge is equipped with current limliting blockingproof cylinder (10), concrete flow passage outlet (11), in concrete flow passage outlet (11) bottom agitator B (2) is installed, agitator B (2) is connected and fixed with rack platform (3), agitator B (2) bottom is equipped with motor B (4), and shaft B (8) and perfusing hole (9) are installed among the agitator B (2).
10. the mixer of the tiny hollow type pipe grouting of a kind of thin-walled according to claim 9, it is characterized in that: current limliting blockingproof cylinder (10) is the pneumatic piston cylinder structure, mainly constitute by cylinder body and pneumatic piston rod, cylinder body is fixed, the closing door that is driven concrete flow passage outlet (11) by pneumatic piston rod is opened or is closed, concrete flow passage outlet (11) is the open type structure, is provided with a closing door in concrete flow passage outlet (11) inboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010181818XA CN101870139B (en) | 2010-05-21 | 2010-05-21 | Grouting process of thin-wall fine hollow type pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010181818XA CN101870139B (en) | 2010-05-21 | 2010-05-21 | Grouting process of thin-wall fine hollow type pipe |
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| Publication Number | Publication Date |
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| CN101870139A true CN101870139A (en) | 2010-10-27 |
| CN101870139B CN101870139B (en) | 2012-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010181818XA Expired - Fee Related CN101870139B (en) | 2010-05-21 | 2010-05-21 | Grouting process of thin-wall fine hollow type pipe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110435003A (en) * | 2019-08-15 | 2019-11-12 | 东莞市交港建材有限公司 | A kind of concrete grouting equipment and grouting method |
| CN114043605A (en) * | 2021-11-10 | 2022-02-15 | 中北大学 | Surface layer slurry treatment equipment for composite foamed cement wallboard |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1095319A (en) * | 1994-03-18 | 1994-11-23 | 杨文忠 | Composite spring and application thereof with one heart |
| CN2827516Y (en) * | 2005-10-21 | 2006-10-18 | 于树林 | Secondary mixer |
| CN201214278Y (en) * | 2007-12-29 | 2009-04-01 | 宋斌 | Mortar pre-stirring type continuous cement concrete stirring station |
-
2010
- 2010-05-21 CN CN201010181818XA patent/CN101870139B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1095319A (en) * | 1994-03-18 | 1994-11-23 | 杨文忠 | Composite spring and application thereof with one heart |
| CN2827516Y (en) * | 2005-10-21 | 2006-10-18 | 于树林 | Secondary mixer |
| CN201214278Y (en) * | 2007-12-29 | 2009-04-01 | 宋斌 | Mortar pre-stirring type continuous cement concrete stirring station |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110435003A (en) * | 2019-08-15 | 2019-11-12 | 东莞市交港建材有限公司 | A kind of concrete grouting equipment and grouting method |
| CN110435003B (en) * | 2019-08-15 | 2020-04-03 | 东莞市交港建材有限公司 | Concrete grouting equipment and grouting method |
| CN114043605A (en) * | 2021-11-10 | 2022-02-15 | 中北大学 | Surface layer slurry treatment equipment for composite foamed cement wallboard |
| CN114043605B (en) * | 2021-11-10 | 2022-12-27 | 中北大学 | Surface layer slurry treatment equipment for composite foamed cement wallboard |
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| Publication number | Publication date |
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| CN101870139B (en) | 2012-02-01 |
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