CN109622174A - Sand making machine - Google Patents
Sand making machine Download PDFInfo
- Publication number
- CN109622174A CN109622174A CN201910040417.3A CN201910040417A CN109622174A CN 109622174 A CN109622174 A CN 109622174A CN 201910040417 A CN201910040417 A CN 201910040417A CN 109622174 A CN109622174 A CN 109622174A
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- CN
- China
- Prior art keywords
- screening
- sub
- broken
- cover
- making machine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/0012—Devices for disintegrating materials by collision of these materials against a breaking surface or breaking body and/or by friction between the material particles (also for grain)
- B02C19/0018—Devices for disintegrating materials by collision of these materials against a breaking surface or breaking body and/or by friction between the material particles (also for grain) using a rotor accelerating the materials centrifugally against a circumferential breaking surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/02—Feeding devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
Abstract
The present invention relates to engineering machinery fields, disclose a kind of sand making machine, it include: broken cavity (10) with broken chamber (100), setting in the indoor impeller of crusher chamber (12) and screening body (14) with screening feeding inlet (140) and screening discharge port (142) respectively for material disengaging, being crushed the top and bottom that chamber penetrates through broken cavity simultaneously has the broken feeding inlet (102) for being located at the top for being crushed cavity and the broken discharge port (104) positioned at the bottom of broken cavity；Screening body is configured to be fine particle and coarseparticulate by the material screening fallen by screening feeding inlet, and so that the fine particle is entered the region for being crushed the periphery for being located at impeller of chamber and the coarseparticulate is made to enter impeller.The sand making machine can will carry out broken raw material sieved in advance so that the fine particle in raw material is not involved in crushing operation and coarseparticulate is crushed, to reduce the Dust Capacity in the power loss and crushing operation of sand making machine.
Description
Technical field
The present invention relates to engineering machinery fields, and in particular, to a kind of sand making machine.
Background technique
Sandstone aggregate is the primary building material of the structures such as concrete and heap stone-laying in hydraulic engineering.With natural sand stone
Increasingly exhausted and government's environmental protection renovation dynamics increasing, Machine-made Sand has become the mainstream of sandstone aggregate industry.
Vertical shaft impact crusher is also known as sand making machine, is developed in conjunction with the actual conditions of domestic sand production aspect processed
Provide domestic, international, top standard efficient rock crushing plant.Since vertical shaft impact crusher has the high, energy consumption at sand coarse aggregate ratio
The advantages that low and grain shape is good, therefore be widely used in preparing Machine-made Sand, especially broken partial size is greater than 0 and to be less than or equal to
The material of 40mm.
Since in usual sandstone raw material comprising a certain proportion of small particle finished product such as larger than 0 and 5mm can be less than or equal to
Building stones necessarily will increase the power loss of sand making machine, while also can if this part small particle building stones participates in high speed impact sand
The content for increasing dust, is all unnecessary from the perspective of rear end dedusting and save the cost.
Summary of the invention
The object of the present invention is to provide a kind of sand making machine, which can will carry out broken raw material and sieve in advance
So that the fine particle in raw material is not involved in crushing operation and coarseparticulate is crushed, to reduce the power loss of sand making machine
And the Dust Capacity in crushing operation.
To achieve the goals above, the present invention provides a kind of sand making machine, and the sand making machine includes:
Broken cavity, the broken cavity have broken chamber, and the broken chamber penetrates through the top of the broken cavity
With bottom and there is the broken feeding inlet at the top for being located at the broken cavity and being crushed positioned at the bottom of the broken cavity
Discharge port；
Impeller, the impeller are arranged in the crusher chamber room；And
Body is sieved, the screening body has the screening feeding inlet for material disengaging respectively and screening discharge port, the screening
Body is configured to the material screening fallen by the screening feeding inlet be fine particle and coarseparticulate, and makes described thin
Grain object enters the region of the periphery for being located at the impeller of the broken chamber and the coarseparticulate is made to enter the impeller.
In the above-mentioned technical solutions, by sand making machine be arranged screening body, and by the screening body be configured to by
It is fine particle and coarseparticulate by the material screening that screening feeding inlet is fallen into, and the fine particle is made to enter broken chamber
Positioned at the periphery of impeller region and so that the coarseparticulate is entered impeller so that fine particle be not involved in crushing operation and
It is expelled directly out the broken chamber, thus reduces the Dust Capacity in the power loss and crushing operation of sand making machine, in this way, not
The efficiency of crushing operation is improved only, and makes crushing operation more environmentally-friendly.
Preferably, the screening body include be set to above the impeller in bucket-shaped screening cover, the screening covers on
It is in gradually-reducing shape in feeding inlet to the direction of the screening discharge port from described sieve, the both ends of the screening cover are open difference
The screening feeding inlet and the screening discharge port are formed, and is provided with screening hole on screening cover.
Preferably, the screening cover is enclosed by the screening circle of multiple axially spaced-apart arrangements along the screening cover, institute
Stating screening body includes the connecting rod that multiple screening circles link together, and the gap between the adjacent screening circle is formed
The screening hole.
Preferably, the sand making machine includes the annular housing being set to above the broken cavity, the annular housing
Both ends are that opening is respectively formed feeding inlet and discharge port, and the discharge port is connected with the broken feeding inlet, the annular chamber
The inner wall of body is provided with boss；
The outer wall of the screening cover is provided with the flange that can be supported in the boss.
Preferably, the screening body includes the elastomer being arranged between the flange and the boss.
Preferably, the sand making machine includes being set to above the screening feeding inlet and material capable of being imported to the screening
In feeding inlet and feeding distribution mechanism that material is fallen from the region of the central axis far from the impeller.
Preferably, the feeding distribution mechanism includes sub-material inner cover, covers at sub-material outer cover and branch outside the sub-material inner cover
Support supporting rib between the sub-material inner cover and the sub-material outer cover, wherein the sub-material inner cover far from it is described sieve into
One end of material mouth is closed end, offers sub-material entrance at the top of the sub-material outer cover and bottom offers sub-material outlet.
Preferably, it is covered in the sub-material from the direction that the sub-material entrance is exported to the sub-material in flaring shape；
It is covered on outside the sub-material on the direction that the sub-material entrance is exported to the sub-material in flaring shape.
Preferably, the wall and horizontal plane institute of angle formed by the side wall and horizontal plane of the sub-material inner cover and the screening cover
At angle it is equal, and/or
Angle formed by the wall and horizontal plane of angle formed by the wall and horizontal plane of the sub-material outer cover and the screening cover
It is equal.
Preferably, the feeding distribution mechanism includes the ring pipe for being set to the sub-material entrance.
Other features and advantages of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
The drawings are intended to provide a further understanding of the invention, and constitutes part of specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the agent structure schematic diagram of the sand making machine of the preferred embodiment for the present invention；
Fig. 2 is the preferred structure schematic diagram of the screening body in the sand making machine of the preferred embodiment for the present invention；
Fig. 3 is the preferred structure schematic diagram of the feeding distribution mechanism in the sand making machine of the preferred embodiment for the present invention.
Description of symbols
10- is crushed cavity；100- is crushed chamber；102- is crushed feeding inlet；104- is crushed discharge port；12- impeller；14- sieve
It is seperated；140- sieves feeding inlet；141- elastomer；142- sieves discharge port；143- support；144- screening cover；146- screening circle；
148- flange；149- connecting rod；16- annular housing；160- feeding inlet；162- boss；18- feeding distribution mechanism；In 180- sub-material
Cover；182- sub-material outer cover；184- supporting rib；186- ring pipe.
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments.It should be understood that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
In the present invention, in the absence of explanation to the contrary, the noun of locality used such as " upper and lower, left and right " typically refers to
In conjunction in practical application orientation and attached drawing in shown in orientation understand, " inside and outside " is the inside and outside of the profile of finger.
The present invention provides a kind of sand making machines, and as shown in fig. 1, the sand making machine includes broken cavity 10,12 and of impeller
Sieve body 14.Broken cavity 10 has broken chamber 100, is crushed top and bottom and tool that chamber 100 penetrates through broken cavity 10
There are the broken feeding inlet 102 at the top for being located at broken cavity 10 and the broken discharge port 104 positioned at the bottom of broken cavity 10；Leaf
Wheel 12 is arranged in broken chamber 100, specifically, impeller 12 may be provided at broken feeding inlet 102 and broken discharge port 104 it
Between；Sieving body 14 has the screening feeding inlet 140 for material disengaging respectively and screening discharge port 142, and screening body 14 is arranged to
Enough material screenings that will be fallen by screening feeding inlet 140 are fine particle and coarseparticulate, and it is broken to enter the fine particle
Broken chamber 100 be located at impeller 12 periphery region and so that the coarseparticulate is entered impeller 12.By being set in sand making machine
Set screening body 14, and will screening body 14 be configured to by the material screening fallen by screening feeding inlet 140 be fine particle and
Coarseparticulate, and so that the fine particle is entered the peripheral region for being located at impeller 12 of broken chamber 100 and make described thick
Grain object enters impeller 12, so that fine particle is not involved in crushing operation and is expelled directly out broken chamber 100, thus reduces
The power loss of sand making machine and the Dust Capacity in crushing operation, in this way, not only increasing the efficiency of crushing operation, and make
Crushing operation is more environmentally-friendly.It should be noted that can to sieve body 14 according to actual needs for the partial size of the 0-5mm in raw material
Material screened out as fine particle and the region of the periphery for being located at impeller 12 that makes fine particle enter broken chamber 100,
Remaining material as coarseparticulate and can be made it into impeller 12 simultaneously.
It is not exposed to specific limitation as the shape and structure of screening body 14, as long as screening body 14 can according to demand will be former
Fine particle in material screens out and makes it into the region of the periphery for being located at impeller 12 of broken chamber 100, while can will remain
Remaining material is as coarseparticulate and makes it into impeller 12.As shown in fig. 1, screening body 14 may include being set to impeller
Above 12 is in bucket-shaped screening cover 144, and screening cover 144 is being on from screening feeding inlet 140 to the direction for sieving discharge port 142
Gradually-reducing shape, the both ends of screening cover 144 are open to be respectively formed screening feeding inlet 140 and screening discharge port 142, and are sieved
Screening hole is provided on cover 144.In this way, setting screening cover 144 to from screening feeding inlet 140 to screening discharge port 142
It is in gradually-reducing shape on direction, and under the action of the screening hole, the fine particle fallen into the raw material in screening cover 144 can quilt
The region of the periphery for being located at impeller 12 of broken chamber 100 is screened out and falls in, the fine particle screened out finally can be by being crushed
Discharge port 104 is discharged, and coarseparticulate enters impeller 12 and participates in crushing operation.It should be pointed out that can set according to actual needs
The shape in the fixed screening hole and aperture.
As shown in Figure 2, screening cover 144 can be enclosed by the screening circle 146 of multiple axially spaced-apart arrangements along screening cover 144
It is formed, screening body 14 includes the connecting rod 149 that multiple screening circles 146 link together, specifically, connecting rod 149 can be along sieve
Divide the bus setting of cover 144, in addition, settable multiple spaced connecting rods 149 are so that 144 overall structure is covered in screening
Stronger, the gap between adjacent screening circle 146 forms the screening hole.
In addition, annular housing 16 can also be arranged above broken cavity 10, the both ends of annular housing 16 are open shape respectively
At feeding inlet 160 and discharge port, the discharge port is connected with broken feeding inlet 102, can be arranged in the inner wall of annular housing 16
Boss 162；The flange 148 of boss 162 can be supported in the outer wall setting of screening cover 144.By the way that 144 installation of cover will be sieved
In annular housing 16, the fine particle that can avoid screening out diffuses in the exterior space of sand making machine.In addition, annular housing 16
It may connect to the top of broken cavity 10, in this way, since sand making machine can be vibrated at work by certain frequency, screening cover
144 can also vibrate therewith, to preferably be sieved.
In addition, elastomer 141 can also be arranged between flange 148 and boss 162, exist in such manner, it is possible to amplify screening cover 144
Vibration under sand making machine drive improves the screening effect of screening cover 144.Wherein, elastomer 141 may include spring, in addition, as schemed
Shown in 2, support 143 can be set on flange 148 to install spring.
As shown in fig. 1, feeding distribution mechanism 18 can be set in sand making machine, and feeding distribution mechanism 18 is set to screening feeding inlet 140
Top, and be configured to import material in screening feeding inlet 140 and make material from the central axis far from impeller 12
Region is fallen, so that the material entered in screening body 14 is more evenly scattered in the central axis far from screening cover 144
Region, to further increase screening effect.
As shown in Figure 3, feeding distribution mechanism 18 may include sub-material inner cover 180, cover at outside the sub-material outside sub-material inner cover 180
Cover 182 and the supporting rib 184 being supported between sub-material inner cover 180 and sub-material outer cover 182, sub-material inner cover 180 and sub-material outer cover
The material channel passed through for material can be formed between 182, wherein the top of sub-material outer cover 182 offers sub-material entrance and bottom
Portion offers sub-material outlet, and one end of separate the screening feeding inlet 140 of sub-material inner cover 180 is closed end to guarantee material from described
Material channel passes through.In addition, the multiple supporting ribs being spaced apart can be arranged between sub-material inner cover 180 and sub-material outer cover 182
184, multiple supporting ribs 184 can be uniformly distributed along the circumferential direction of sub-material inner cover 182.
In order to preferably 144 be cooperated with screening cover, it may make sub-material inner cover 180 from the sub-material entrance to described
It is in flaring shape on the direction of sub-material outlet, in addition, sub-material outer cover 182 also may make to export in the sub-material entrance to the sub-material
Direction on be in flaring shape.Preferably, sub-material inner cover 180, sub-material outer cover 182 and screening cover 144 can be coaxially disposed.
In addition, in order to enable the material imported by feeding distribution mechanism 18 can more smoothly by 144 screening of screening cover and be led
Out, it can protect angle formed by the wall and horizontal plane of angle formed by the side wall and horizontal plane by sub-material inner cover 180 and screening cover 144
Hold consistent, that is to say, that angle formed by the side wall and horizontal plane of sub-material inner cover 180 is the first angle, the wall of screening cover 144 with
Angle formed by horizontal plane is the second angle, and the first angle can be equal with the second angle, wherein can be set in the first angle
Between 30 ° -60 °.In addition, can be by the wall and horizontal plane institute of the wall of sub-material outer cover 182 and horizontal plane angle and screening cover 144
At angle be consistent, it can also be appreciated that angle formed by the wall and horizontal plane of sub-material outer cover 182 be third folder
Angle, third angle can be equal with the second angle.It should be noted that when screening cover 144 is in a circular table shape, the wall of screening cover 144
For curved surface, then it is understood that the second angle be curved surface section and horizontal plane formed by angle, likewise, working as sub-material inner cover 180
When in a circular table shape, the side wall of sub-material inner cover 180 is curved surface, it is possible to understand that the first angle be curved surface section and horizontal plane institute at
Angle, in addition, when sub-material outer cover 182 is in a circular table shape, the side wall of sub-material outer cover 182 is curved surface, then it is understood that third is pressed from both sides
Angle is angle formed by the section of curved surface and horizontal plane.
In conjunction with shown in Fig. 1 and Fig. 3, feeding distribution mechanism 18 may include the ring pipe 186 for being set to the sub-material entrance, annular
Pipe 186 can play buffer function to the material for entering the sub-material entrance.
It is described the prefered embodiments of the present invention in detail above in conjunction with attached drawing, still, the present invention is not limited to above-mentioned realities
The detail in mode is applied, within the scope of the technical concept of the present invention, a variety of letters can be carried out to technical solution of the present invention
Monotropic type, these simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (10)
1. a kind of crusher, which is characterized in that the sand making machine includes:
Broken cavity (10), the broken cavity (10) have broken chamber (100), described in broken chamber (100) perforation
The top and bottom of broken cavity (10) simultaneously have the broken feeding inlet (102) positioned at the top of the broken cavity (10) and position
Broken discharge port (104) in the bottom of the broken cavity (10)；
Impeller (12), impeller (12) setting is in the broken chamber (100)；And
It sieves body (14), screening body (14) has the screening feeding inlet (140) for material disengaging respectively and screening discharge port
(142), screening body (14) is configured to the material screening fallen by screening feeding inlet (140) be fine particle
And coarseparticulate, and make the fine particle into the area of the periphery for being located at the impeller (12) of the broken chamber (100)
Domain and make the coarseparticulate enter the impeller (12).
2. sand making machine according to claim 1, which is characterized in that the screening body (14) includes being set to the impeller
(12) above is in bucket-shaped screening cover (144), and the screening cover (144) is from the screening feeding inlet (140) to the sieve
Separate and be in gradually-reducing shape on the direction of material mouth (142), it is described screening cover (144) both ends be opening be respectively formed it is described sieve into
Material mouth (140) and the screening discharge port (142), and screening hole is provided on screening cover (144).
3. sand making machine according to claim 2, which is characterized in that the screening cover (144) is covered by multiple along the screening
(144) the screening circle (146) of axially spaced-apart arrangement is enclosed, and the screening body (14) includes enclosing multiple screenings
(146) connecting rod (149) to link together, the gap between the adjacent screening circle (146) form the screening hole.
4. sand making machine according to claim 2, which is characterized in that the sand making machine includes being set to the broken cavity
(10) annular housing (16) above, the both ends of the annular housing (16) are that opening is respectively formed feeding inlet (160) and discharging
Mouthful, the discharge port is connected with the broken feeding inlet (102), and the inner wall of the annular housing (16) is provided with boss
(162)；
The outer wall of the screening cover (144) is provided with the flange (148) that can be supported in the boss (162).
5. sand making machine according to claim 4, which is characterized in that the screening body (14) includes being arranged in the flange
(148) elastomer (141) between the boss (162).
6. the sand making machine according to any one of claim 2-5, which is characterized in that the sand making machine includes being set to institute
It states above screening feeding inlet (140) and material can be imported in the screening feeding inlet (140) and make material from far from institute
State the feeding distribution mechanism (18) that the region of the central axis of impeller (12) is fallen.
7. sand making machine according to claim 6, which is characterized in that the feeding distribution mechanism (18) include sub-material inner cover (180),
It covers at the outer sub-material outer cover (182) of the sub-material inner cover (180) and is supported on the sub-material inner cover (180) and the sub-material
Supporting rib (184) between outer cover (182), wherein separate screening feeding inlet (140) of the sub-material inner cover (180)
One end is closed end, offers sub-material entrance at the top of the sub-material outer cover (182) and bottom offers sub-material outlet.
8. sand making machine according to claim 7, which is characterized in that the sub-material inner cover (180) is from the sub-material entrance
It is in flaring shape on the direction exported to the sub-material；
The sub-material outer cover (182) is in flaring shape on the direction that the sub-material entrance is exported to the sub-material.
9. sand making machine according to claim 8, which is characterized in that the side wall of the sub-material inner cover (180) and horizontal plane institute
At angle and it is described screening cover (144) wall it is equal with angle formed by horizontal plane, and/or
Angle formed by the wall and horizontal plane of the sub-material outer cover (182) and it is described screening cover (144) wall and horizontal plane institute at
Angle it is equal.
10. sand making machine according to claim 8, which is characterized in that the feeding distribution mechanism (18) includes being set to described point
Expect the ring pipe (186) of entrance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910040417.3A CN109622174A (en) | 2019-01-16 | 2019-01-16 | Sand making machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910040417.3A CN109622174A (en) | 2019-01-16 | 2019-01-16 | Sand making machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109622174A true CN109622174A (en) | 2019-04-16 |
Family
ID=66061100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910040417.3A Pending CN109622174A (en) | 2019-01-16 | 2019-01-16 | Sand making machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109622174A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110142119A (en) * | 2019-06-13 | 2019-08-20 | 江苏山宝集团有限公司 | A kind of drying type sand making machine |
| CN112221648A (en) * | 2020-10-30 | 2021-01-15 | 灵璧县飞松机械制造有限责任公司 | Dustless anti-blocking sand making machine |
| CN112452706A (en) * | 2020-11-19 | 2021-03-09 | 安徽省天麒面业科技股份有限公司 | Wheat impurity removing machine for flour processing |
| CN112549293A (en) * | 2020-12-25 | 2021-03-26 | 罗洪湖 | Preparation method and processing equipment of recycled fine aggregate high-strength self-compacting concrete |
| CN112677324A (en) * | 2020-12-25 | 2021-04-20 | 罗洪湖 | Processing equipment for high-strength self-compacting concrete with recycled fine aggregate |
| CN112791838A (en) * | 2021-01-30 | 2021-05-14 | 重庆三铭重工有限公司 | Automatic adjusting structure and adjusting method for feed inlet of vertical shaft type impact crusher |
| CN113695057A (en) * | 2021-08-31 | 2021-11-26 | 南昌矿山机械有限公司 | Screening and feeding mechanism of vertical shaft type impact crusher and crushing method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110142119A (en) * | 2019-06-13 | 2019-08-20 | 江苏山宝集团有限公司 | A kind of drying type sand making machine |
| CN112221648A (en) * | 2020-10-30 | 2021-01-15 | 灵璧县飞松机械制造有限责任公司 | Dustless anti-blocking sand making machine |
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| CN112452706A (en) * | 2020-11-19 | 2021-03-09 | 安徽省天麒面业科技股份有限公司 | Wheat impurity removing machine for flour processing |
| CN112452706B (en) * | 2020-11-19 | 2022-03-04 | 安徽省天麒面业科技股份有限公司 | Wheat impurity removing machine for flour processing |
| CN112549293A (en) * | 2020-12-25 | 2021-03-26 | 罗洪湖 | Preparation method and processing equipment of recycled fine aggregate high-strength self-compacting concrete |
| CN112677324A (en) * | 2020-12-25 | 2021-04-20 | 罗洪湖 | Processing equipment for high-strength self-compacting concrete with recycled fine aggregate |
| CN112791838A (en) * | 2021-01-30 | 2021-05-14 | 重庆三铭重工有限公司 | Automatic adjusting structure and adjusting method for feed inlet of vertical shaft type impact crusher |
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Application publication date: 20190416 |
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