CN109772692A - A kind of energy-efficient building engineering construction special vibrating Sand screen and its application method - Google Patents
A kind of energy-efficient building engineering construction special vibrating Sand screen and its application method Download PDFInfo
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- CN109772692A CN109772692A CN201910207203.0A CN201910207203A CN109772692A CN 109772692 A CN109772692 A CN 109772692A CN 201910207203 A CN201910207203 A CN 201910207203A CN 109772692 A CN109772692 A CN 109772692A
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- rod
- sieve
- vibration
- reciprocating vibration
- stone
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Abstract
A kind of energy-efficient building engineering construction special vibrating Sand screen of the invention and its application method, Architectural Equipment technical field.Equipment of the invention includes vibration sand mechanism and stone delivery device, vibration sand mechanism includes the first rod of reciprocating vibration, second rod and sieve of reciprocating vibration, stone delivery device is set to the top of sieve, stone delivery device includes fixed plate and push rod, hydraulic cylinder and hydraulic telescopic rod are equipped between fixed plate and push rod, first rod of reciprocating vibration and the second rod of reciprocating vibration drive sieve to synchronize vibration while vibration, the sandstone being unscreened covered on sieve can be separated, the small sand of diameter is fallen from the sieve pore of sieve, and the big stone of diameter also stays in the top of sieve, hydraulic telescopic rod elongation drives push rod to slide in the top of sieve, the stone that will be left in above sieve is pushed from screen surface, it is husky to complete primary sieve, it then proceedes to topple over the sandstone being unscreened on sieve, manual cleaning stone is not needed, effect Rate is higher.
Description
Technical field
The invention belongs to Architectural Equipment technical field, a kind of specifically energy-efficient building engineering construction special vibrating
Sand screen and its application method.
Background technique
In building trade, sand is one of main construction material, and there are a large amount of particles in the raw material of sand, therefore is needed
It is used after filtering.The husky equipment of existing sieve has very much, and general volume is larger, suitable for once sieving large batch of sand, but it is right
In measuring less situation with husky, higher cost, and also it is inconvenient to carry.
Through retrieving, invention and created name are as follows: a kind of hanger supported shaking screen sand device (application No. is: 201410494094.2, Shen
Please day are as follows: 2014.09.24), this application discloses a kind of hanger supported shaking screen sand devices, and it is husky that it solves sieve in the prior art
Big, at high cost, the inconvenient to carry problem of equipment volume, simple, small in size, easy to carry easy for installation, the vibration effect of structure
Fruit is good；Its technical solution are as follows: including support frame, sieve, suspension line and vibrating motor, the bottom fixed grit of support frame, sieve
Lower section has the cross support plate being fixedly connected with support frame, and support frame top is symmetrical arranged suspension line；Support frame top peace
Vibrating motor is filled, and one side end of support frame is coated with protective layer；Support frame bottom that cloth bag is set.But the deficiency of the program
It is in very little in the sand quantity that takes of sieve, sieve needs to topple over stone after taking sand, and it is husky to continue the nonbreaking sieve that carries out, efficiency
Lowly.
Summary of the invention
1. technical problems to be solved by the inivention
It is an object of the invention to solve the problems, such as that small sieve sand equipment sieves husky inefficiency in the prior art, provide a kind of efficient
Energy saving building engineering construction special vibrating Sand screen and its application method solve the problems, such as this.
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention are as follows:
A kind of energy-efficient building engineering construction special vibrating Sand screen, it is characterised in that: including vibration sand mechanism and stone
Sub- delivery device, the vibration sand mechanism include the first rod of reciprocating vibration, the second rod and sieve of reciprocating vibration, and described first is past
Multiplex vibration rod and the second rod of reciprocating vibration are arranged in parallel, and first rod of reciprocating vibration and the second rod of reciprocating vibration are individually fixed in
The two sides of sieve, the stone delivery device are set to the top of sieve, and the stone delivery device is set to the first reciprocal vibration
The horizontal vertical direction of dynamic rod and the second rod of reciprocating vibration, the stone delivery device include fixed plate and push rod, described solid
It is equipped with hydraulic cylinder and hydraulic telescopic rod between fixed board and push rod, the push rod is set to the first rod of reciprocating vibration and second past
Between multiplex vibration rod, the length of the push rod be slightly less than between the first rod of reciprocating vibration and the second rod of reciprocating vibration it is vertical away from
From.
Preferably, the lower end of the vibration sand mechanism is equipped with guide storehouse, and the guide storehouse is set to the lower end of sieve, institute
The level cross-sectionn for stating guide storehouse is rectangle tapered from top to bottom, and the bin bottom of leading is equipped with opening, the guide orlop
The opening in portion is equipped with the guide storehouse striker plate of folding.
Preferably, the vibration sand mechanism is fixedly connected with deflector chute far from one end of stone delivery device, described to lead
Hopper is obliquely installed, and the deflector chute two sides are equipped with striker plate, and the vertical range between the striker plate is equal to the first reciprocal vibration
Vertical range between dynamic rod and the second rod of reciprocating vibration, the striker plate and the first rod of reciprocating vibration and the second rod of reciprocating vibration
It is correspondingly arranged.
Preferably, the distance between sieve is 0.2-0.6cm to the push rod in the vertical direction, the sieve on the sieve
The diameter in hole is 0.2-0.6cm.
Preferably, the hydraulic cylinder and hydraulic telescopic rod are set as two one group, and the stroke of the hydraulic telescopic rod is greater than the
The length of one rod of reciprocating vibration.
Preferably, the bottom in the guide storehouse is equipped with sand storage bin.
Preferably, bracket, first rod of reciprocating vibration and the second reciprocal vibration are fixed with below the vibration sand mechanism
Dynamic rod is set to bracket two sides, and the top in the guide storehouse is fixedly connected with bracket.
Preferably, the horizontal cross-sectional area in top in the guide storehouse is greater than the area of sieve.
Preferably, the end of the deflector chute is equipped with stone storage box.
A kind of application method of energy-efficient building engineering construction special vibrating Sand screen, using described above efficient
The sandstone not screened is poured on sieve by vibration sand device, and the first rod of reciprocating vibration and the second rod of reciprocating vibration drive sieve
Net is vibrated, and the sand on sieve enters the guide storehouse of lower section, the hydraulic cylinder of stone delivery device by the sieve pore on sieve
Hydraulic telescopic rod is pushed to stretch out, hydraulic telescopic rod pushes push rod to move in screen surface, and push rod will remain in stone on sieve
Son is pushed to deflector chute, and it is husky to complete sieve.
3. beneficial effect
Using technical solution provided by the invention, compared with prior art, have the following beneficial effects:
A kind of energy-efficient building engineering construction special vibrating Sand screen of the invention and its application method, including vibration sand
Mechanism and stone delivery device, vibration sand mechanism include the first rod of reciprocating vibration, the second rod and sieve of reciprocating vibration, and first is past
Multiplex vibration rod and the second rod of reciprocating vibration are arranged in parallel, and the first rod of reciprocating vibration and the second rod of reciprocating vibration are individually fixed in sieve
Two sides, stone delivery device is set to the top of sieve, and stone delivery device is set to the first rod of reciprocating vibration and second past
The horizontal vertical direction of multiplex vibration rod, stone delivery device include fixed plate and push rod, are equipped between fixed plate and push rod
Hydraulic cylinder and hydraulic telescopic rod, push rod are set between the first rod of reciprocating vibration and the second rod of reciprocating vibration, the length of push rod
Degree is slightly less than the vertical range between the first rod of reciprocating vibration and the second rod of reciprocating vibration, and the first rod of reciprocating vibration and second is back and forth
Vibration rod drives sieve to synchronize vibration while vibration, the sandstone being unscreened covered on sieve can be separated,
The small sand of diameter is fallen from the sieve pore of sieve, and the big stone of diameter also stays in the top of sieve, and hydraulic cylinder works make liquid
Press telescopic rod elongation, hydraulic telescopic rod elongation drives push rod to slide in the top of sieve, will be left in stone above sieve from
Screen surface pushes, and completes primary sieve sand, then proceedes to topple over the sandstone being unscreened on sieve, do not need manual cleaning stone,
It is more efficient.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of energy-efficient building engineering construction special vibrating Sand screen of the invention；
Fig. 2 is the top view that a kind of energy-efficient building engineering construction special vibrating Sand screen of the invention removes sieve；
Fig. 3 is a kind of top view of energy-efficient building engineering construction special vibrating Sand screen of the invention.
Label declaration in schematic diagram:
110, vibration sand mechanism；111, the first rod of reciprocating vibration；112, the second rod of reciprocating vibration；113, sieve；120, stone
Delivery device；121, fixed plate；123, hydraulic cylinder；124, hydraulic telescopic rod；125, push rod；130, deflector chute；131, backgauge
Plate；140, stone storage box；150, bracket；160, guide storehouse；161, guide storehouse striker plate；170, sand storage bin.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings, in attached drawing
Several embodiments of the invention are given, still, the invention can be realized in many different forms, however it is not limited to this paper institute
The embodiment of description, on the contrary, purpose of providing these embodiments is make it is more thorough and comprehensive to the disclosure.
It should be noted that it can directly on the other element when element is referred to as " being fixedly arranged on " another element
Or there may also be elements placed in the middle；When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements；Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement are for illustrative purposes only.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical；Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention；Term " and or " used herein includes one or more phases
Any and all combinations of the listed item of pass.
Embodiment 1:
Referring to attached drawing 1, attached drawing 2 and attached drawing 3, a kind of energy-efficient building engineering construction vibrating sieve sand dress of the present embodiment
Set, including vibration sand mechanism 110 and stone delivery device 120, vibration sand mechanism 110 include the first rod 111 of reciprocating vibration,
Second rod 112 and sieve 113 of reciprocating vibration, the first rod 111 and the second rod 112 of reciprocating vibration of reciprocating vibration are arranged in parallel, and first
Rod 111 and the second rod 112 of reciprocating vibration of reciprocating vibration are individually fixed in the two sides of sieve 113, and stone delivery device 120 is set to
The top of sieve 113, stone delivery device 120 are set to the level of the first rod 111 and the second rod 112 of reciprocating vibration of reciprocating vibration
Vertical direction, stone delivery device 120 include fixed plate 121 and push rod 125, are equipped between fixed plate 121 and push rod 125
Hydraulic cylinder 123 and hydraulic telescopic rod 124, hydraulic cylinder 123 and hydraulic telescopic rod 124 are set as two one group, two hydraulic telescopic rods
The push-pull effort that 124 pairs of push rod 125 apply is more uniform, and the push effect of push rod 125 is more preferable, and push rod 125 is set to the
Between one rod 111 and the second rod 112 of reciprocating vibration of reciprocating vibration, the length of push rod 125 is slightly less than the first rod 111 of reciprocating vibration
And the second vertical range between rod 112 of reciprocating vibration.The rod 111 of reciprocating vibration of the first of the present embodiment and the second rod of reciprocating vibration
112 are arranged in parallel and are fixed on the two sides of sieve 113, and the first rod of reciprocating vibration 111 and the second rod of reciprocating vibration 112 are in vibration
It drives sieve 113 to synchronize vibration simultaneously, the sandstone being unscreened covered on sieve 113 can be separated, diameter is small
Sand is fallen from the sieve pore of sieve 113, and the big stone of diameter also stays in the top of sieve 113, and hydraulic cylinder 123 works so that liquid
Telescopic rod 124 is pressed to extend, the elongation of hydraulic telescopic rod 124 drives push rod 125 to slide in the top of sieve 113, will be left in sieve
The stone of 113 tops is pushed from 113 surface of sieve, is completed primary sieve sand, is then proceeded to topple over the sand being unscreened on sieve 113
Stone does not need manual cleaning stone, more efficient.The stroke of hydraulic telescopic rod 124 is greater than the length of the first rod 111 of reciprocating vibration
Degree, push rod 125 can complete stone release the top of sieve 113, prevent stone to be deposited in the top of sieve 113.
The lower end of vibration sand mechanism 110 in the present embodiment is equipped with guide storehouse 160, and guide storehouse 160 is set to sieve 113
Lower end, the level cross-sectionn in guide storehouse 160 is rectangle tapered from top to bottom, and 160 bottom of guide storehouse is equipped with opening, guide storehouse
The opening of 160 bottoms is equipped with the guide storehouse striker plate 161 of folding, and the bottom in guide storehouse 160 is equipped with sand storage bin 170.When
Sand can be fallen into when falling from the sieve pore of sieve 113 in the guide storehouse 160 of 110 lower end of vibration sand mechanism, the sand after screening
Inner wall slide downward along guide storehouse 160 is then fallen into the sand storage bin 170 of 160 lower section of guide storehouse.
Vibration sand mechanism 110 in the present embodiment is fixedly connected with deflector chute far from one end of stone delivery device 120
130, deflector chute 130 is obliquely installed, and the end of deflector chute 130 is equipped with stone storage box 140.130 two sides of deflector chute are equipped with backgauge
Plate 131, the vertical range between striker plate 131 are equal to hanging down between the first rod 111 and the second rod 112 of reciprocating vibration of reciprocating vibration
Straight distance, striker plate 131 are correspondingly arranged with the first rod 111 and the second rod 112 of reciprocating vibration of reciprocating vibration.When push rod 125 will
Stone releases the upper surface of sieve 113, and stone enters stone storage box 140 along deflector chute 130 under the action of inertia, and leads
The striker plate 131 of 130 two sides of hopper setting can prevent stone from skidding off from deflector chute 130.
Distance is 0.2-0.6cm to the push rod 125 of the present embodiment between sieve 113 in the vertical direction, on sieve 113
The diameter of sieve pore be 0.2-0.6cm, stone can adequately be intercepted in 113 upper surface of sieve, push rod 125 is in vertical side
Distance is that 0.2-0.6cm can adequately release stone from 113 upper surface of sieve between sieve 113 upwards.
Bracket 150 is fixed with below the vibration sand mechanism 110 of this implementation, the first rod 111 and second of reciprocating vibration is reciprocal
Vibration rod 112 is set to 150 two sides of bracket, and the top in guide storehouse 160 is fixedly connected with bracket 150.The top water in guide storehouse 160
Flat cross-sectional area is greater than the area of sieve 113, and sand can be prevented to be scattering into dress during falling from the sieve pore of sieve 113
It sets outer.
Embodiment 2:
Referring to attached drawing 1, attached drawing 2 and attached drawing 3, a kind of energy-efficient building engineering construction special vibrating Sand screen of the present embodiment
Application method the sandstone not screened is poured on sieve 113, first using high-efficiency vibration Sand screen described above
Rod 111 and the second rod 112 of reciprocating vibration of reciprocating vibration drive sieve 113 to be vibrated, and the sand on sieve 113 passes through sieve
Sieve pore on 113 enters the guide storehouse 160 of lower section, and the hydraulic cylinder 123 of stone delivery device 120 pushes hydraulic telescopic rod 124 to stretch
Out, hydraulic telescopic rod 124 pushes push rod 125 in 113 apparent motion of sieve, and push rod 125 will remain in stone on sieve 113
It is pushed to deflector chute 130, it is husky to complete sieve.
Above embodiments only express certain embodiment of the invention, and the description thereof is more specific and detailed, but can not
Therefore limitations on the scope of the patent of the present invention are interpreted as；It should be pointed out that for those of ordinary skill in the art,
Without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection model of the invention
It encloses；Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of energy-efficient building engineering construction special vibrating Sand screen, it is characterised in that: including vibration sand mechanism
(110) and stone delivery device (120), the vibration sand mechanism (110) include the first rod (111) of reciprocating vibration, it is second past
Multiplex vibration rod (112) and sieve (113), first rod (111) of reciprocating vibration is parallel with second rod (112) of reciprocating vibration to be set
It sets, first rod (111) of reciprocating vibration and the second rod (112) of reciprocating vibration are individually fixed in the two sides of sieve (113), described
Stone delivery device (120) is set to the top of sieve (113), and the stone delivery device (120) is set to the first reciprocal vibration
The horizontal vertical direction of dynamic rod (111) and the second rod (112) of reciprocating vibration, the stone delivery device (120) includes fixed plate
(121) and push rod (125) hydraulic cylinder (123) and hydraulically extensible, are equipped between the fixed plate (121) and push rod (125)
Bar (124), the push rod (125) are set between the first rod (111) of reciprocating vibration and the second rod (112) of reciprocating vibration, institute
State push rod (125) length be slightly less than between the first rod (111) of reciprocating vibration and the second rod (112) of reciprocating vibration it is vertical away from
From.
2. a kind of energy-efficient building engineering construction special vibrating Sand screen according to claim 1, it is characterised in that:
The lower end of the vibration sand mechanism (110) is equipped with guide storehouse (160), and the guide storehouse (160) is set under sieve (113)
End, the level cross-sectionn of the guide storehouse (160) are rectangle tapered from top to bottom, and guide storehouse (160) bottom is equipped with and opens
Mouthful, the opening of guide storehouse (160) bottom is equipped with the guide storehouse striker plate (161) of folding.
3. a kind of energy-efficient building engineering construction special vibrating Sand screen according to claim 1, it is characterised in that:
The vibration sand mechanism (110) is fixedly connected with deflector chute (130) far from the one end of stone delivery device (120), described to lead
Hopper (130) is obliquely installed, and deflector chute (130) two sides are equipped with striker plate (131), hanging down between the striker plate (131)
Straight distance is equal to the vertical range between the first rod (111) of reciprocating vibration and the second rod (112) of reciprocating vibration, the striker plate
(131) it is correspondingly arranged with the first rod (111) of reciprocating vibration and the second rod (112) of reciprocating vibration.
4. a kind of energy-efficient building engineering construction special vibrating Sand screen according to claim 1, it is characterised in that:
The distance between sieve (113) is 0.2-0.6cm to the push rod (125) in the vertical direction, the sieve on the sieve (113)
The diameter in hole is 0.2-0.6cm.
5. a kind of energy-efficient building engineering construction special vibrating Sand screen according to claim 1, it is characterised in that:
The hydraulic cylinder (123) and hydraulic telescopic rod (124) are set as two one group, and the stroke of the hydraulic telescopic rod (124) is greater than the
The length of one rod (111) of reciprocating vibration.
6. a kind of energy-efficient building engineering construction special vibrating Sand screen according to claim 2, it is characterised in that:
The bottom of the guide storehouse (160) is equipped with sand storage bin (170).
7. a kind of energy-efficient building engineering construction special vibrating Sand screen according to claim 2, it is characterised in that:
It is fixed with bracket (150) below the vibration sand mechanism (110), first rod (111) of reciprocating vibration and the second reciprocal vibration
Dynamic rod (112) are set to bracket (150) two sides, and the top of the guide storehouse (160) is fixedly connected with bracket (150).
8. a kind of energy-efficient building engineering construction special vibrating Sand screen according to claim 2, it is characterised in that:
The horizontal cross-sectional area in top of the guide storehouse (160) is greater than the area of sieve (113).
9. a kind of energy-efficient building engineering construction special vibrating Sand screen according to claim 3, it is characterised in that:
The end of the deflector chute (130) is equipped with stone storage box (140).
10. a kind of application method of energy-efficient building engineering construction special vibrating Sand screen, it is characterised in that: using above-mentioned
The sandstone not screened is poured on sieve (113) by described in any item high-efficiency vibration Sand screens, the first rod of reciprocating vibration
(111) and the second rod (112) of reciprocating vibration drives sieve (113) to be vibrated, and the sand on sieve (113) passes through sieve
(113) sieve pore on enters the guide storehouse (160) of lower section, and the hydraulic cylinder (123) of stone delivery device (120) pushes hydraulically extensible
Bar (124) stretches out, and hydraulic telescopic rod (124) pushes push rod (125) in sieve (113) apparent motion, and push rod (125) will be residual
It stays in stone on sieve (113) to be pushed to deflector chute (130), it is husky to complete sieve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910207203.0A CN109772692A (en) | 2019-03-19 | 2019-03-19 | A kind of energy-efficient building engineering construction special vibrating Sand screen and its application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910207203.0A CN109772692A (en) | 2019-03-19 | 2019-03-19 | A kind of energy-efficient building engineering construction special vibrating Sand screen and its application method |
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| Publication Number | Publication Date |
|---|---|
| CN109772692A true CN109772692A (en) | 2019-05-21 |
Family
ID=66489614
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910207203.0A Withdrawn CN109772692A (en) | 2019-03-19 | 2019-03-19 | A kind of energy-efficient building engineering construction special vibrating Sand screen and its application method |
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| Country | Link |
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| CN (1) | CN109772692A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111822332A (en) * | 2020-07-26 | 2020-10-27 | 李小连 | Chemical material screening machine for chemical industry |
| CN112893087A (en) * | 2021-01-14 | 2021-06-04 | 拉萨纳龙建筑材料有限公司 | Multi-particle-size stone screening device and method for concrete production |
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| US5581916A (en) * | 1994-07-11 | 1996-12-10 | Hirose Co., Inc. | Excavating, sieving and grading device for working crawler |
| CN203831612U (en) * | 2014-04-17 | 2014-09-17 | 浙江新力塑料股份有限公司 | Screening mechanism used for engineering plastic cooling screening machine |
| CN106914418A (en) * | 2015-12-28 | 2017-07-04 | 天津全智生产力促进有限公司 | A kind of scraper |
| CN206868606U (en) * | 2017-06-24 | 2018-01-12 | 张永霞 | A kind of spiral industrial chemicals screening machine |
| CN207154136U (en) * | 2017-09-09 | 2018-03-30 | 深圳市晋荣混凝土有限公司 | A kind of linear vibrating screen |
| CN207655498U (en) * | 2017-09-27 | 2018-07-27 | 山东汶上北大机械有限公司 | A kind of rice mill brush sieve frame |
| CN207971087U (en) * | 2018-01-15 | 2018-10-16 | 南通鸿基市政工程有限公司 | A kind of bitumen regeneration equipment is sieved with cold burden |
| CN208131916U (en) * | 2018-01-27 | 2018-11-23 | 蒋盼盼 | A kind of heavy castings type core roughing sand multilevel screening device |
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2019
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5581916A (en) * | 1994-07-11 | 1996-12-10 | Hirose Co., Inc. | Excavating, sieving and grading device for working crawler |
| CN203831612U (en) * | 2014-04-17 | 2014-09-17 | 浙江新力塑料股份有限公司 | Screening mechanism used for engineering plastic cooling screening machine |
| CN106914418A (en) * | 2015-12-28 | 2017-07-04 | 天津全智生产力促进有限公司 | A kind of scraper |
| CN206868606U (en) * | 2017-06-24 | 2018-01-12 | 张永霞 | A kind of spiral industrial chemicals screening machine |
| CN207154136U (en) * | 2017-09-09 | 2018-03-30 | 深圳市晋荣混凝土有限公司 | A kind of linear vibrating screen |
| CN207655498U (en) * | 2017-09-27 | 2018-07-27 | 山东汶上北大机械有限公司 | A kind of rice mill brush sieve frame |
| CN207971087U (en) * | 2018-01-15 | 2018-10-16 | 南通鸿基市政工程有限公司 | A kind of bitumen regeneration equipment is sieved with cold burden |
| CN208131916U (en) * | 2018-01-27 | 2018-11-23 | 蒋盼盼 | A kind of heavy castings type core roughing sand multilevel screening device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111822332A (en) * | 2020-07-26 | 2020-10-27 | 李小连 | Chemical material screening machine for chemical industry |
| CN112893087A (en) * | 2021-01-14 | 2021-06-04 | 拉萨纳龙建筑材料有限公司 | Multi-particle-size stone screening device and method for concrete production |
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Application publication date: 20190521 |