CN111729835A - Sand screening machine for construction machinery - Google Patents
Sand screening machine for construction machinery Download PDFInfo
- Publication number
- CN111729835A CN111729835A CN202010617297.1A CN202010617297A CN111729835A CN 111729835 A CN111729835 A CN 111729835A CN 202010617297 A CN202010617297 A CN 202010617297A CN 111729835 A CN111729835 A CN 111729835A
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- CN
- China
- Prior art keywords
- sand
- screening
- clearance
- hole
- laminating
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/18—Drum screens
- B07B1/22—Revolving drums
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/50—Cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/02—Devices for feeding articles or materials to conveyors
- B65G47/16—Devices for feeding articles or materials to conveyors for feeding materials in bulk
- B65G47/18—Arrangements or applications of hoppers or chutes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
- B65G69/12—Sieving bulk materials during loading or unloading
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/04—Bulk
- B65G2201/045—Sand, soil and mineral ore
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention discloses a sand screening machine for construction machinery, which structurally comprises a sand inlet, a conveying device, a fixed box and a supporting rod, wherein the conveying device is provided with a rotating mechanism, a rotator and a conveying belt, a sliding ball rotates while sliding, so that impurities in sand stay in a screening pipe to prevent influence on the building sand, a wire mesh is arranged in a screening hole to prevent the impurities on the inner side of the screening hole from entering a rotating device to be blocked, a ball body rotates through a connecting ring in the rotating process to prevent the balls from being condensed into blocks under the action of moisture, the flowability of the sand is enhanced, the screening effect of the building sand is improved, the moisture in the sand enters a gap to be stored under the inclined flow, the conveying belt flows out under the gravity after rotating for a circle, a spring rod enables the gap hole to be adjusted according to the friction force of the sand and the gap hole to avoid blocking and clear the moisture in the sand, avoid the sand laminating on the conveyer belt, avoid the inertia force that the sand influences the transportation, dispersion when preventing the sand transportation.
Description
Technical Field
The invention relates to the field of construction machinery, in particular to a sand screening machine for construction machinery.
Background
A filter screen is installed to the sand screening machine, transport the conveyor of filter screen top with the sand and set up in the collecting box of filter screen below, when screening the sand, make it drop on the filter screen, sort out the sand, but current sand screening machine is because just salvaging from the river, moisture is great, condense into cubic easily, the mobility of building sand is weak when making the screening filter, easy bonding is on the filter screen, be unfavorable for the screening of building sand, and sand moisture is great makes the sand laminating on conveyer easily when screening, influence the inertial force of transportation easily, lead to easy dispersion when the sand transports, thereby influence the distance of inertial force, influence the sand and pile up.
Disclosure of Invention
The invention is realized by the following technical scheme: the utility model provides a construction machinery sand screening machine, its structure is including going into husky mouth, conveyer, fixed case, bracing piece, go into husky mouthful welding in the upper end of bracing piece, the bracing piece is installed in the inside of fixed case, conveyer inlays the upper end at fixed case, it is located conveyer's upper end to go into husky mouth, conveyer is equipped with rotary mechanism, circulator, conveyer belt, rotary mechanism is located the upper surface of conveyer belt, the conveyer belt laminating is on the surface of circulator, the circulator inlays the upper end at fixed case, rotary mechanism is located the inside lower extreme of going into husky mouth, the circulator is the slope structure, and is parallel to each other with rotary mechanism, fixed incasement portion is equipped with the motor, carries out the electricity with conveyer and is connected.
As a further improvement of the invention, the rotating mechanism is provided with a screening pipe, a fixing ring, a sliding ball and a filtering mechanism, the screening pipe is positioned at the inner side of the filtering mechanism, the sliding ball is attached at the inner side of the fixing ring, the outer side of the filtering mechanism is clamped at the inner side of the sliding ball, the fixing ring is embedded at two sides of the rotator, and the sliding ball slides on the filtering mechanism and the fixing ring and is positioned on the same central axis.
As a further improvement of the invention, the filtering mechanism is provided with a rotating device, a stress block, elastic blocks and screening holes, wherein the rotating device is positioned at the outer side of the stress block, the elastic blocks are attached to two sides of the stress block, the screening holes are positioned at two sides of the stress block, the rotating device is arranged on a fixing ring, the stress block is of a triangular structure, the inner sides of the stress block are in a mutually annular connection state, and the screening holes are of a circular hole state structure and are provided with wire netting.
As a further improvement of the invention, the rotating device is provided with six fixed rods, a flow port, a connecting ring and a sphere, the fixed rods are connected inside the sphere, the flow port is positioned on the surface of the sphere, the connecting ring is movably matched with the sphere, the connecting ring and the screening holes are positioned on the same central axis, and the flow ports are distributed on two sides of the sphere.
As a further improvement of the invention, the conveyor belt is provided with a rubber block, a sliding block and a cleaning mechanism, the rubber block is attached to two sides of the sliding block, the cleaning mechanism is in clearance fit with the rubber block, the lower end of the cleaning mechanism is attached to the surface of the rotator, and one end of the rubber block is connected in a linear state.
As a further improvement of the invention, the cleaning mechanism is provided with four clearance holes, a filter screen, spring rods and support blocks, wherein the clearance holes are attached to the outer side of the filter screen, the spring rods are arranged in the support blocks, the spring rods are embedded at the lower ends of the clearance holes, the clearance holes are in clearance fit with the rubber blocks, and the four spring rods are uniformly distributed in an annular manner and are distributed in an annular manner by taking the support blocks as central points.
Advantageous effects
Compared with the prior art, the invention has the beneficial effects that:
1. the smooth pearl is rotatory in gliding, make impurity in the sand stop inside the screening pipe, prevent to influence the sand for building, and the screening hole is equipped with the wire netting, prevent that its inboard impurity from entering into rotating device and blockking up, through the pressure of rotatory power and sand, make the elastic block compress to bounce back, thereby make the sand obtain the effort and circulate, rotate the in-process spheroid and rotate through the go-between, prevent to condense into the cubic under the moisture action, the mobility of reinforcing sand, improve the screening effect of sand for building.
2. After the sand got into the conveyer belt, get into the clearance fit of filter screen and block rubber, make the moisture in the sand get into the clearance under the flow of slope and store, flow out under gravity behind the rotatory round of conveyer belt, and under the spring action of spring beam, according to the frictional force of sand and clearance hole, the spring beam makes the clearance hole adjust, avoid causing the jam, the moisture in the sand is cleared up, avoid the sand laminating on the conveyer belt, prevent that the sand from influencing the inertial force of transportation easily, disperse easily when avoiding the sand transportation.
Drawings
Fig. 1 is a schematic structural view of a sand screening machine of construction machinery according to the present invention.
Fig. 2 is a schematic side view of a conveyor according to the present invention.
Fig. 3 is a schematic plan view of a rotating mechanism according to the present invention.
FIG. 4 is a schematic view of a partial plan view of a filter mechanism according to the present invention.
Fig. 5 is a schematic plan view of a rotating device according to the present invention.
FIG. 6 is a schematic side view of a portion of a conveyor belt according to the present invention.
FIG. 7 is a schematic side view of a cleaning mechanism according to the present invention.
In the figure: the device comprises a sand inlet-1, a conveying device-2, a fixed box-3, a supporting rod-4, a rotating mechanism-21, a rotator-22, a conveying belt-23, a screening pipe-211, a fixed ring-212, a sliding bead-213, a filtering mechanism-214, a rotating device-a 1, a stress block-a 2, an elastic block-a 3, a screening hole-a 4, a fixed rod-a 11, a flow port-a 12, a connecting ring-a 13, a sphere-a 14, a rubber block-231, a sliding block-232, a cleaning mechanism-233, a clearance hole-w 1, a filtering screen-w 2, a spring rod-w 3 and a supporting block-w 4.
Detailed Description
The technology of the present invention is further described with reference to the accompanying drawings:
example 1:
as shown in fig. 1-5:
the invention relates to a sand screening machine of construction machinery, which structurally comprises a sand inlet 1, a conveying device 2, a fixed box 3 and a supporting rod 4, wherein the sand inlet 1 is welded at the upper end of the supporting rod 4, the supporting rod 4 is arranged in the fixed box 3, the conveying device 2 is fixedly embedded at the upper end of the fixed box 3, the sand inlet 1 is positioned at the upper end of the conveying device 2, the conveying device 2 is provided with a rotating mechanism 21, a rotator 22 and a conveying belt 23, the rotating mechanism 21 is positioned on the upper surface of the conveying belt 23, the conveying belt 23 is attached to the surface of the rotator 22, the rotator 22 is fixedly embedded at the upper end of the fixed box 3, the rotating mechanism 21 is positioned at the lower end in the sand inlet 1, the rotator 22 is of an inclined structure and is parallel to the rotating mechanism 21, a motor is arranged in the fixed box 3 and is electrically connected with the conveying device 2 to enable the rotating mechanism 21 to rotate, and screening the sand.
The rotating mechanism 21 is provided with a screening pipe 211, a fixing ring 212, a sliding bead 213 and a filtering mechanism 214, the screening pipe 211 is located on the inner side of the filtering mechanism 214, the sliding bead 213 is attached to the inner side of the fixing ring 212, the outer side of the filtering mechanism 214 is clamped to the inner side of the sliding bead 213, the fixing ring 212 is embedded and fixed to two sides of the rotator 22, the sliding bead 213 slides on the filtering mechanism 214 and the fixing ring 212 and is located on the same central axis, and the sliding bead rotates while sliding, so that impurities in sand stay in the screening pipe 211, and influence on building sand is prevented.
Wherein, filtering mechanism 214 is equipped with rotary device a1, atress piece a2, elasticity piece a3, screening hole a4, rotary device a1 is located the outside of atress piece a2, elasticity piece a3 laminating is in the both sides of atress piece a2, screening hole a4 is located atress piece a2 both sides, rotary device a1 installs on solid fixed ring 212, atress piece a2 is the triangle-shaped structure, and the inboard is mutual annular connection state, screening hole a4 is circular hole state structure, and is equipped with the wire netting, prevents that the impurity of its inboard from entering into rotary device a1 and blockking up.
The rotating device a1 is provided with a fixing rod a11, a flow port a12, a connecting ring a13 and a sphere a14, the fixing rod a11 is connected inside the sphere a14, the flow port a12 is located on the surface of the sphere a14, the connecting ring a13 is movably matched with the sphere a14, the connecting ring a13 and the screening hole a4 are located on the same central axis, the flow port a12 is provided with six flow ports which are distributed on two sides of the sphere a14, the sphere a14 rotates through the connecting ring a13 in the rotating process to circulate sand, and the rotation has the effect of enabling the sand to be scattered more, so that the sand is prevented from being condensed into blocks under the action of moisture, the flowability of the sand is enhanced, and the screening effect of the building sand is improved.
The embodiment has the following specific use modes and functions:
in the invention, sand enters the screening pipe 211 in the rotating mechanism 21 through the sand inlet 1, the rotating mechanism 21 is rotated under the power of a motor, the sliding balls 213 slide on the filtering mechanism 214 and the fixing ring 212 and are positioned on the same central axis, and rotate while sliding, so that impurities in the sand stay in the screening pipe 211 to prevent the influence on building sand, the screening hole a4 is provided with a wire mesh to prevent the impurities on the inner side of the screening hole from entering the rotating device a1 to be blocked, and when the sand is blocked between the stress block a2 and the rotating device a1, the elastic block a3 is compressed and rebounded through the rotating force and the pressure of the sand, so that the sand is acted to flow, the ball a14 rotates through the connecting ring a13 in the rotating process, and the rotation has the effect of more breaking the sand, and the sand is prevented from being condensed into blocks under the action of moisture, the fluidity of the sand is enhanced, and the screening effect of the building sand is improved.
Example 2:
as shown in fig. 6-7:
wherein, the conveyer belt 23 is equipped with rubber block 231, sliding block 232, clearance mechanism 233, the laminating of rubber block 231 is in the both sides of sliding block 232, clearance mechanism 233 and rubber block 231 clearance fit, the laminating of the lower extreme of clearance mechanism 233 is on the surface of circulator 22, the one end of rubber block 231 is connected to rectilinear state, and sliding block 232 fixes rubber block 231, avoids rubber block 231 deformation range too big.
The cleaning mechanism 233 is provided with a clearance hole w1, a filter screen w2, spring rods w3 and a support block w4, the clearance hole w1 is attached to the outer side of the filter screen w2, the spring rods w3 are installed inside the support block w4, the spring rods w3 are embedded at the lower end of the clearance hole w1, the clearance hole w1 is in clearance fit with the rubber block 231, the four spring rods w3 are uniformly distributed in an annular mode and are distributed in an annular mode by taking the support block w4 as a central point, the spring rods w3 enter the clearance fit of the filter screen w2 and the rubber block 231, moisture in the sand is stored through the clearance, the sand flows out after rotating for one circle, and under the elastic force of the spring rods w3, the clearance hole w1 is adjusted according to the friction force of the sand and the clearance hole w1, so that the blockage is avoided, the moisture in the sand is cleaned, and the sand is prevented from being attached to the conveyor belt 23.
The embodiment has the following specific use modes and functions:
according to the sand cleaning device, after sand enters the conveyor belt 23, under the clearance fit of the filter screen w2 and the rubber block 231, water in the sand enters the clearance hole w1 under the inclined flow, enters the filter screen w2 and flows into the clearance for storage, the filter screen w2 has the effect of preventing the sand from entering the interior, the sand is intercepted outside the clearance, the conveyor belt 23 rotates for one circle and flows out under the gravity, and under the elastic action of the spring rod w3, the spring rod w3 enables the clearance hole w1 to be adjusted according to the friction force of the sand and the clearance hole w1, so that the blockage is avoided, the water in the sand is cleaned, the sand is prevented from being attached to the conveyor belt 23, the inertia force of transportation is prevented from being easily influenced, and the sand is prevented from being easily dispersed during transportation.
The technical scheme of the invention is utilized, or a similar technical scheme is designed by a person skilled in the art based on the inspiration of the technical scheme of the invention, so that the technical effects are achieved, and the technical scheme and the method fall into the protection scope of the invention.
Claims (6)
1. The utility model provides a construction machinery screening sand machine, its structure is including going into husky mouth (1), conveyer (2), fixed case (3), bracing piece (4), go into husky mouth (1) welding in the upper end of bracing piece (4), the inside in fixed case (3) is installed in bracing piece (4), conveyer (2) are inlayed in the upper end of fixed case (3), go into husky mouth (1) and be located the upper end of conveyer (2), its characterized in that:
conveyer (2) are equipped with rotary mechanism (21), circulator (22), conveyer belt (23), rotary mechanism (21) are located the upper surface of conveyer belt (23), conveyer belt (23) laminating is on the surface of circulator (22), circulator (22) are inlayed and are fixed in the upper end of fixed case (3), rotary mechanism (21) are located the inside lower extreme of sand inlet (1).
2. The construction machine sand screen of claim 1, wherein: rotary mechanism (21) are equipped with screening pipe (211), solid fixed ring (212), sliding bead (213), filtering mechanism (214), screening pipe (211) are located filtering mechanism (214) inboard, sliding bead (213) laminating is inboard at solid fixed ring (212), the outside block of filtering mechanism (214) is inboard at sliding bead (213), gu fixed ring (212) inlays admittedly in circulator (22) both sides.
3. The construction machine sand screen according to claim 2, wherein: filtering mechanism (214) is equipped with rotary device (a1), atress piece (a2), elasticity piece (a3), screening hole (a4), rotary device (a1) are located the outside of atress piece (a2), the laminating of elasticity piece (a3) is in the both sides of atress piece (a2), screening hole (a4) are located atress piece (a2) both sides, rotary device (a1) are installed on solid fixed ring (212).
4. A construction machine sand screen according to claim 3, wherein: the rotating device (a1) is provided with a fixing rod (a11), a flow port (a12), a connecting ring (a13) and a ball body (a14), the fixing rod (a11) is connected to the inside of the ball body (a14), the flow port (a12) is located on the surface of the ball body (a14), the connecting ring (a13) is movably matched with the ball body (a14), and the connecting ring (a13) and the screening hole (a4) are located on the same central axis.
5. The construction machine sand screen of claim 1, wherein: conveyer belt (23) are equipped with rubber block (231), sliding block (232), clearance mechanism (233), the laminating of rubber block (231) is in the both sides of sliding block (232), clearance mechanism (233) and rubber block (231) clearance fit, the lower extreme laminating of clearance mechanism (233) is on the surface of circulator (22).
6. The construction machine sand screen of claim 5, wherein: clearance mechanism (233) are equipped with clearance hole (w1), filter screen (w2), spring lever (w3), supporting shoe (w4), clearance hole (w1) laminating is in the outside of filter screen (w2), spring lever (w3) are installed in the inside of supporting shoe (w4), spring lever (w3) are inlayed and are fixed in the lower extreme of clearance hole (w1), clearance hole (w1) and rubber block (231) clearance fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010617297.1A CN111729835A (en) | 2020-06-30 | 2020-06-30 | Sand screening machine for construction machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010617297.1A CN111729835A (en) | 2020-06-30 | 2020-06-30 | Sand screening machine for construction machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111729835A true CN111729835A (en) | 2020-10-02 |
Family
ID=72653924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010617297.1A Pending CN111729835A (en) | 2020-06-30 | 2020-06-30 | Sand screening machine for construction machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111729835A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112657832A (en) * | 2021-01-15 | 2021-04-16 | 罗明伟 | Sand screening device for hydraulic engineering |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3862719A (en) * | 1972-06-15 | 1975-01-28 | Karl A Muller | Ball mill for treating used casting sand |
| KR20090003685U (en) * | 2007-10-16 | 2009-04-21 | 신미선 | Conveyor |
| CN201988506U (en) * | 2011-01-30 | 2011-09-28 | 肥乡县农乐机械科技有限公司 | Movable type full-automatic sand screening machine |
| CN107651382A (en) * | 2017-10-31 | 2018-02-02 | 云和县东泽阀门有限公司 | A kind of conveyer belt with pooling feature |
| CN108525754A (en) * | 2018-03-31 | 2018-09-14 | 莆田市荔城区海程贸易有限公司 | A kind of building monitoring cement solution block device |
| CN108816379A (en) * | 2018-06-28 | 2018-11-16 | 柯金炼 | A kind of engineering material processing equipment for building field of centrifugal force solution sand block |
| CN109092658A (en) * | 2018-07-28 | 2018-12-28 | 宁夏中科天际防雷研究院有限公司 | A kind of building sandstone screen selecting and separating mechanism |
| CN210230575U (en) * | 2019-05-10 | 2020-04-03 | 罗文彩 | Sand-stone separating device for construction waste |
-
2020
- 2020-06-30 CN CN202010617297.1A patent/CN111729835A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3862719A (en) * | 1972-06-15 | 1975-01-28 | Karl A Muller | Ball mill for treating used casting sand |
| KR20090003685U (en) * | 2007-10-16 | 2009-04-21 | 신미선 | Conveyor |
| CN201988506U (en) * | 2011-01-30 | 2011-09-28 | 肥乡县农乐机械科技有限公司 | Movable type full-automatic sand screening machine |
| CN107651382A (en) * | 2017-10-31 | 2018-02-02 | 云和县东泽阀门有限公司 | A kind of conveyer belt with pooling feature |
| CN108525754A (en) * | 2018-03-31 | 2018-09-14 | 莆田市荔城区海程贸易有限公司 | A kind of building monitoring cement solution block device |
| CN108816379A (en) * | 2018-06-28 | 2018-11-16 | 柯金炼 | A kind of engineering material processing equipment for building field of centrifugal force solution sand block |
| CN109092658A (en) * | 2018-07-28 | 2018-12-28 | 宁夏中科天际防雷研究院有限公司 | A kind of building sandstone screen selecting and separating mechanism |
| CN210230575U (en) * | 2019-05-10 | 2020-04-03 | 罗文彩 | Sand-stone separating device for construction waste |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112657832A (en) * | 2021-01-15 | 2021-04-16 | 罗明伟 | Sand screening device for hydraulic engineering |
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Application publication date: 20201002 |
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| RJ01 | Rejection of invention patent application after publication |