CN114101025A - Shot screening device of shot blasting machine - Google Patents
Shot screening device of shot blasting machine Download PDFInfo
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- CN114101025A CN114101025A CN202010875075.XA CN202010875075A CN114101025A CN 114101025 A CN114101025 A CN 114101025A CN 202010875075 A CN202010875075 A CN 202010875075A CN 114101025 A CN114101025 A CN 114101025A
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- vibration
- hopper
- waste
- shot
- blasting machine
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- 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
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
- B07B1/284—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens with unbalanced weights
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- 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
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- 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
Abstract
The invention discloses a shot screening device of a shot blasting machine, which comprises a bag breaking device, a vibration feeding device, a linear screen body device and a waste collecting device. The bag breaking device comprises a bag breaking machine funnel body and a connecting flange; the vibration feeding device comprises a hopper, a vibration feeding groove and a vibration motor a; the linear screen body device comprises a single-layer double-mesh screen body and a vibration motor b; the waste collecting device comprises a No. 1 discharging chute, a No. 2 discharging chute, a No. 3 discharging chute, a No. 1 waste hopper and a No. 2 waste hopper; the bag breaker funnel body pass through flange with the hopper links to each other, the vibration feed trough links to each other with the individual layer double screen sieve body, the chute of unloading of 1# links to each other with the waste material hopper of 1#, the chute of unloading of 3# links to each other with the waste material hopper of 2 #. When the automatic feeding device is used, on one hand, automatic feeding can be completed, and on the other hand, waste and old pills can be recycled through screening, so that the purchase cost of throwing the pills is reduced.
Description
Technical Field
The invention relates to the technical field of vibration screening, in particular to a shot blasting machine shot screening device.
Background
The shot blasting machine is used for projecting high-speed dense shot beams by using a shot blasting machine, striking each part of the steel in an original state, and performing three-dimensional and all-directional cleaning, so that a rust layer, an oxide skin and dirt on each surface of the steel are quickly peeled off, a smooth surface with certain roughness is obtained, the adhesive force between a paint film and the surface of the steel is improved, the fatigue resistance and the corrosion resistance of the steel are improved, the internal quality of the steel is improved, and the service life of the steel is prolonged.
The automatic ball screening and feeding device of the ball blasting machine for the lacquered line of the thick plate part of the precious steel is put into operation in 3 months in 2005, and the operation has been carried out for 14 years so far. Over ten years, shot blasting particles in the area completely depend on manpower, a travelling crane lifts large bags of shot materials right above a shot material feeding hopper, then the shot materials fall to a proper height, a knife is manually taken to manually cut the bottoms of the bags, and the shot materials are leaked and fall to the shot material hopper to finish feeding. In the feeding process, some dust flies out and falls off in the area, certain harm is caused to the personal health of workers on the site, and certain potential safety hazards exist.
Shot blasting machine has large shot consumption in the field production process, and after one-time throwing, the shot is mixed with dirt such as iron scale and the like and cannot be used continuously; the mechanical properties of the new pellets are inferior to those of the used pellets, the surface of the pellets will harden after use (work hardening), the harder the used pellets, the better the quality of the steel plate to be thrown out, and the old pellets are discarded.
National patent CN208262626U discloses a shot blasting machine material grain sieving mechanism, through a screen cylinder, the screw conveyor paddle leaf, driving motor, the controller, first screening net, the second screening net, the third screening net, has solved and has need to screen and throw the comparatively loaded down with trivial details problem of selection of shot-blast through to throwing the ball before the use.
The technology is to directly screen the pills, the whole device pushes the pills forwards by a screw mechanism, a certain gap is formed between the screw mechanism and a barrel, so that the pills with small particles are easily clamped in the inside to cause fault shutdown, the screening is not thorough, the particles with small diameters are not completely screened, the particles are mixed to the next particle and go through the large inside to cause material mixing.
National patent CN104014480A discloses a multistage filtering's shale shaker, and it includes the sieve case, and the certain angle setting of sieve case slope is equipped with the feed inlet on the upper end of sieve case, and the lower extreme is equipped with the discharge gate, and the back of sieve case still is equipped with vibrating motor, and the screen cloth of sieve incasement portion is multistage step structure from the upper end to the lower extreme in proper order, and each step below of screen cloth is equipped with the lower extreme of passage and is located the collecting box. The screening of different particle sizes of materials can be realized in the process of vibration screening.
The upper end of the vibrating screen of the technology is heavier than the lower end, so that the upper end is heavier than the lower end, the 2 vibrating motors drive the whole screen to vibrate together with the feeding port, and the vibration amplitude is difficult to adjust. The situation that the amount of materials added at a charging opening is different every time is unknown, so that the weight bias is different every time, equipment damage can be caused, small materials are mixed into a large material hopper, and a material mixing accident occurs; the whole screen is inclined, and in addition, the vibration, the material can arrive the bottom very fast, causes the emergence of compounding accident.
Therefore, the shot blasting machine pill screening device is required to be designed, automatic feeding can be completed, waste and old pills can be recycled through screening, the safety and continuous work of equipment can be guaranteed, and mixing is avoided.
Disclosure of Invention
The invention aims to provide a shot blasting machine shot screening device which can complete automatic feeding, replace manual operation, recycle waste shot through screening, ensure safe and continuous operation of equipment and avoid mixing.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a shot screening device of a shot blasting machine comprises a bag breaking device, a vibration feeding device, a linear screen body device and a waste collecting device; the bag breaking device comprises a bag breaking machine funnel body and a connecting flange, a bag breaking device and a grid plate are designed inside the bag breaking machine funnel body, an installation support a is designed outside the bag breaking machine funnel body, and the bag breaking machine funnel body is connected and installed on a support through the installation support a; the vibration feeding device comprises a hopper and a vibration feeding groove, the vibration feeding groove is connected with the hopper, a vibration motor a is installed on the vibration feeding groove, an installation support seat b is designed outside the hopper, and the hopper is connected and installed on the support through the installation support seat b; the linear screen body device comprises a single-layer double-mesh screen body, a feeding interface and a screen, wherein the screen is installed inside the single-layer double-mesh screen body through a screen pressing plate, a vibration motor b is installed on the single-layer double-mesh screen body, and the single-layer double-mesh screen body is installed on a first-layer platform through a support; the waste collecting device comprises a No. 1 discharging chute, a No. 2 discharging chute, a No. 3 discharging chute, a No. 1 waste hopper and a No. 2 waste hopper; the bag breaker funnel body pass through flange with the hopper links to each other, the vibration feed trough passes through the feeding interface and links to each other with the two net of individual layer sieve body, the 1# chute of unloading links to each other with the 1# waste material fill, the 3# chute of unloading links to each other with the 2# waste material fill.
As a further improvement, the bag breaker is in the shape of a quadrangular pyramid, and the head of the bag breaker is pointed.
As a further improvement, two or more vibration motors a are arranged, the parameters of the two vibration motors a are set to be the same, the installation angle of the vibration motors a is 40-55 degrees, and the amplitude of the eccentric blocks of the vibration motors a is 50-65 percent.
As a further improvement, the vibration motor a is controlled in a frequency conversion mode, the running frequency is 36Hz-40Hz, the running working time is 50-60 seconds, and the gap time is 8-12 seconds.
As a further improvement, the two or more vibration motors b are arranged, the parameters of the two vibration motors b are set to be the same, the installation angle of the vibration motors b is 40-55 degrees, and the amplitude of the eccentric blocks of the vibration motors b is 90-100 percent.
As a further improvement, the vibration motor b is controlled in a non-variable frequency mode, the running frequency is 50Hz, and the vibration motor b works continuously.
As a further improvement, the number of the installed screens is two, the two screens are installed on the same frame plane, and the aperture of each screen is the upper limit and the lower limit of the particle size of the standard shot required by the shot blasting machine.
As a further improvement, the garbage collection device also comprises a 1# stop valve and a 2# stop valve, wherein a 1# discharging chute is connected with a 1# waste hopper through the 1# stop valve, and a 3# discharging chute is connected with the 2# waste hopper through the 2# stop valve.
As further improvement, the linear screen body device further comprises a wear-resistant lining plate, the wear-resistant lining plate is installed inside the single-layer double-mesh screen body, and the high position and the low position are flush with the screen.
As a further improvement, the improved structure of the ground safety protection device further comprises a second-layer platform, a safety fence a, a safety fence b, a stair a, a stair b and a platform upright post, wherein the platform upright post is fixed on the ground, the second-layer platform is installed on a support, the safety fence a is installed on the first-layer platform, the safety fence b is installed on the second-layer platform, the stair a is installed between the first-layer platform and the second-layer platform, and the stair b is installed between the first-layer platform and the ground.
The invention has the following advantages:
1. according to the invention, automatic feeding can be completed, manual operation is replaced, the damage of a large amount of dust to the personal health of field workers is avoided, and the safety of field operation is improved.
2. The waste and old pills can be recycled by screening, so that the utilization rate of the pills is improved, and the purchase cost of throwing the pills is reduced.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings.
FIG. 1 is an overall schematic view of a shot screening apparatus of a shot blasting machine according to the present invention;
FIG. 2 is a schematic view of a shot blast screening apparatus that does not include safety fences and stairs;
FIG. 3 is a schematic diagram of a bag breaking device in the shot screening device of the shot blasting machine of the invention;
FIG. 4 is a schematic view of a vibratory feeding device in the shot blasting machine pellet screening apparatus of the present invention;
FIG. 5 is a schematic view of a linear screen apparatus in the shot screening apparatus of the shot blasting machine of the present invention;
FIG. 6 is a flow chart of the operation of the shot screening device of the shot blasting machine of the invention;
in the figure, 1.1-platform column, 1.2-first layer platform, 1.3-safety fence a, 1.4-stair a, 1.5-second layer platform, 1.6-safety fence b, 1.7-bag breaking machine funnel body, 1.8-bag breaking device, 1.9-mounting support a, 1.10-hopper, 1.11-spring damper, 1.12-vibration motor a, 1.13-vibration feeding trough, 1.14-dust removing housing, 1.15-single layer double-mesh screen body, 1.16-vibration motor b, 1.17-vibration-reduction rubber gasket, 1.18-pillar, 1.19-1 # discharging chute, 1.20-1 # stop valve, 1.21-1 # waste hopper, 1.22-2 # discharging chute, 1.23-3 # discharging chute, 1.24-2 # discharging chute, 1.25-2 # waste hopper, 1.26-stair b, 2.1-2.1 # waste hopper, 2.2.2-2 # discharging chute, 1.23-3 # discharging chute, 1.3 # discharging chute, 1.24-2 # waste hopper, 1.2 # discharging chute, 1.3.3-3 # screen support connecting plate, 1.4-3-wear-resistant bolt mounting plate, 1.3-mesh plate, 1.4-wear-resistant bolt mounting plate, 4.1-screen mesh, 4.1-cover plate.
Detailed Description
The invention is described in detail below with reference to the drawings and examples, but the invention is not limited thereto.
As shown in fig. 1-5, the invention comprises a bag breaking device, a vibration feeding device, a linear screen device and a waste collecting device, wherein the bag breaking device comprises a bag breaking machine funnel body 1.7, a connecting flange 2.3 and a dust removing interface 2.1, the bag breaking machine funnel body 1.7 is connected and installed on a bracket 3.1 by a mounting support a 1.9, a bag breaking device 1.8 and a grid plate 2.2 are arranged in the bag breaking machine funnel body 1.7, and a large amount of dust can be generated after a pill bag is broken, and the reserved dust removing interface 2.1 can be externally connected with a dust removing device; the vibration feeding device comprises a hopper 1.10 and a vibration feeding groove 1.13, wherein a connecting flange 2.3 is connected with the hopper 1.10, and a mounting support b 3.2 is designed outside the hopper 1.10 and is mounted on a support 3.1 through a bolt 3.3. The vibration feeding trough 1.13 is connected with the hopper 1.10 through four spring dampers 1.11, and two vibration motors a 1.12 are arranged on the vibration feeding trough 1.13; the linear screen body device comprises a single-layer double-mesh screen body 1.15, a feeding interface 4.1, a screen 4.4, wherein the single-layer double-mesh screen body 1.15 is arranged on a first-layer platform 1.2 through four pairs of damping rubber gaskets 1.17 and a strut 1.18, a dust removal housing 1.14 is arranged at the head feeding interface 4.1 of the single-layer double-mesh screen body 1.15, a vibration feeding groove 1.13 is inserted into the dust removal housing 1.14, pills to be screened enter the single-layer double-mesh screen body 1.15 from the vibration feeding groove and fall onto a wear-resistant lining plate 4.2, the screen 4.4 is arranged and fixed inside the single-layer double-mesh screen body 1.15 through a screen pressing plate 4.3, the high and low positions are flush with the wear-resistant lining plate 4.2, a cover plate 4.5 is arranged at the upper part of the single-layer double-mesh screen body 1.15, two vibration motors b 1.16 are arranged at the lower part, in addition, three discharge chutes are arranged at the lower part of the single-layer double-mesh screen body 1.15, and are respectively a No. 1.19, a No. 2 discharge chute 1.22 and a No. 3 discharge chute 20, a2 # stop valve 1.24 is arranged on a 3# discharging chute 1.23, a 1# waste hopper 1.21 is arranged below a 1# discharging chute 1.19, a 2# waste hopper 1.25 is arranged below a 3# discharging chute 1.23, and a 2# discharging chute 1.22 is connected with a pill charging opening.
As shown in fig. 1, in order to facilitate the operation and maintenance of the equipment, the device of the invention is provided with two layers of working platforms, a first secondary platform 1.2 and a second secondary platform 1.5, each layer of platform is provided with a safety fence and a stair, a platform upright post 1.1 is fixed on the ground, the second platform 1.5 is arranged on a bracket 3.1, a safety fence a 1.3 is arranged on the first platform 1.2, a safety fence b 1.6 is arranged on the second platform 1.5, a stair a 1.4 is arranged between the first platform 1.2 and the second platform 1.5, and a stair b 1.26 is arranged between the first platform 1.2 and the ground.
The shot screening device of the shot blasting machine comprises the following working processes:
the recycled waste pills are loaded in the ton bags, the ton bags are hung above the bag breaking device by a travelling crane, the bag breaking device 1.8 is in a quadrangular pyramid shape, the head part is in a pointed shape, the packaging bags are punctured by utilizing the dead weight of the recycled waste pill ton bags and the sharp fast opening of the bag breaking device 1.8, the recycled waste pills enter the hopper 1.10 through the hopper body 1.7 of the bag breaking device, and the mounting angles of two vibrating motors a 1.12 arranged below the vibrating feeding groove 1.13 are 40 DEG
The vibration motor a 1.12 is controlled in a variable frequency mode, the operating frequency is 36Hz to 40Hz, the operating time is 50 to 60 seconds, and the gap time is 8 to 12 seconds. When the recycled waste pellets enter the hopper 1.10, the two vibration motors a 1.12 work simultaneously through PLC output signals, the waste pellets are uniformly fed through the vibration feeding groove 1.13, the recycled waste pellets are fed into the single-layer double-mesh screen body 1.15 for screening, the two vibration motors b 1.16 are installed at the lower part of the single-layer double-mesh screen body 1.15, the screening efficiency of the recycled waste pellets is controlled by adjusting the vibration angle of the vibration motors b 1.16 to control the passing speed of the recycled waste pellets, and the vibration amplitude of the eccentric blocks of the vibration motors b 1.16 can be adjusted to control the screening efficiency of the recycled waste pellets, so that the screening efficiency is improved by better controlling the passing speed of the recycled waste pellets, and finally all the parameters of the two vibration motors b 1.16 are set to be the same, the angle of the two vibration motors b 1.16 is 40-55 degrees, and the amplitude of the eccentric blocks is 90-100 percent, two vibrating motor b 1.16 are non-frequency conversion control, operating frequency is 50Hz, for continuous operation, when the old and useless pill of retrieving is sent into single-deck double screen sieve body 1.15, through PLC output signal, two vibrating motor b 1.16 simultaneous working, filter the old and useless pill of retrieving, because screen cloth 4.4 installation quantity is two, two screen cloths 4.4 are installed on same frame plane, two screen cloths 4.4 apertures are the particle size upper and lower limits of the required standard pill of shot-blasting machine respectively, so select three granularity specification through single-deck double screen sieve body 1.15: i.e. pellets that are smaller than the lower deviation of the diameter of the standard pellets (off-spec pellets, dust), acceptable pellets within the tolerance range of the standard pellets, pellets that are larger than the upper deviation of the diameter of the standard pellets (off-spec pellets, impurities); the waste pills with the three particle sizes are respectively fed into three discharge ports for collection. Waste materials which are considered to be larger than and smaller than the standard pill deviation are respectively collected by a No. 1 waste hopper 1.21 and a No. 2 waste hopper 1.25, and qualified pills directly enter a charging pipe through a No. 2 discharging chute 1.22 and are added into the shot blasting machine.
In addition, fig. 6 is a working flow chart of the invention, when the shot blasting machine needs to feed materials, the system is started, the device starts to work, at this time, only a traveling crane is needed to lift the recycled waste shot pellets per ton bag above the bag breaking device, the system is closed after the feeding is finished, and the device stops working; in order to facilitate the replacement of the waste hopper, the normal operation of the device is not influenced, the 1# stop valve 1.20 and the 2# stop valve 1.24 which are arranged at the two waste hoppers are controlled by an electric valve and are controlled independently, the two stop valves are in an initial state of an open state, when the waste hoppers are full, the control valves are closed, the waste hoppers are replaced, and the device can be operated independently in the system.
Finally, it should be noted that while the present invention has been described with reference to the specific embodiments thereof, it should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be construed as limiting the present invention, and various equivalent changes and substitutions may be made therein without departing from the spirit of the present invention, and therefore, it is intended that all changes and modifications to the above embodiments within the spirit and scope of the present invention be covered by the appended claims.
Claims (10)
1. The utility model provides a shot-blasting machine pill sieving mechanism which characterized in that: the shot blasting machine shot screening device comprises a bag breaking device, a vibration feeding device, a linear screen body device and a waste collecting device;
the bag breaking device comprises a bag breaking machine funnel body (1.7) and a connecting flange (2.3), a bag breaking machine (1.8) and a grid plate (2.2) are designed in the bag breaking machine funnel body (1.7), an installation support a (1.9) is designed outside the bag breaking machine funnel body (1.7), and the bag breaking machine funnel body (1.7) is connected and installed on a support (3.1) through the installation support a (1.9);
the vibration feeding device comprises a hopper (1.10) and a vibration feeding groove (1.13), the vibration feeding groove (1.13) is connected with the hopper (1.10), a vibration motor a (1.12) is installed on the vibration feeding groove (1.13), an installation support b (3.2) is designed outside the hopper (1.10), and the hopper (1.10) is connected and installed on a support (3.1) through the installation support b (3.2);
the linear screen body device comprises a single-layer double-mesh screen body (1.15), a feeding interface (4.1) and a screen (4.4), wherein the screen (4.4) is installed inside the single-layer double-mesh screen body (1.15) through a screen pressing plate (4.3), a vibrating motor b (1.16) is installed on the single-layer double-mesh screen body (1.15), and the single-layer double-mesh screen body (1.15) is installed on a first-layer platform (1.2) through a strut (1.18);
the waste collecting device comprises a No. 1 discharging chute (1.19), a No. 2 discharging chute (1.22), a No. 3 discharging chute (1.23), a No. 1 waste hopper (1.21) and a No. 2 waste hopper (1.25);
bag-breaking machine funnel body (1.7) through flange (2.3) with hopper (1.10) link to each other, vibratory feeding groove (1.13) link to each other through feeding interface (4.1) and single-deck double screen sieve body (1.15), 1# discharge chute (1.19) links to each other with 1# waste material fill (1.21), 3# discharge chute (1.23) links to each other with 2# waste material fill (1.25).
2. The shot blasting machine pellet screening apparatus of claim 1, wherein: the bag breaker (1.8) is in the shape of a quadrangular pyramid, and the head of the bag breaker is pointed.
3. The shot blasting machine pellet screening apparatus of claim 1, wherein: the vibration motor a (1.12) is provided with two or more than two vibration motors a (1.12), the parameters of the two vibration motors a (1.12) are set to be the same, the installation angle of the vibration motors a (1.12) is 40-55 degrees, and the amplitude of the eccentric block of the vibration motors a (1.12) is 50-65 percent.
4. The shot blasting machine pellet screening apparatus of claim 1, wherein: the vibration motor a (1.12) is controlled by frequency conversion, the operating frequency is 36Hz-40Hz, the operating time is 50-60 seconds, and the gap time is 8-12 seconds.
5. The shot blasting machine pellet screening apparatus of claim 1, wherein: the vibration motors b (3.2) are arranged in two or more than two, the parameters of the two vibration motors b (3.2) are set to be the same, the installation angle of the vibration motors b (3.2) is 40-55 degrees, and the amplitude of the eccentric block of the vibration motors b (3.2) is 90-100 percent.
6. The shot blasting machine pellet screening apparatus of claim 1, wherein: the vibration motor b (3.2) is controlled in a non-variable frequency mode, the running frequency is 50Hz, and the vibration motor b works continuously.
7. The shot blasting machine pellet screening apparatus of claim 1, wherein: the number of the installed screens (4.4) is two, the two screens (4.4) are installed on the same frame plane, and the aperture of each of the two screens (4.4) is the upper and lower limits of the particle size of a standard shot required by the shot blasting machine.
8. The shot blasting machine pellet screening apparatus of claim 1, wherein: the waste collecting device also comprises a 1# stop valve (1.20), a 2# stop valve (1.24), a 1# discharging chute (1.19) is connected with a 1# waste hopper (1.21) through the 1# stop valve (1.20), and a 3# discharging chute (1.23) is connected with a 2# waste hopper (1.25) through the 2# stop valve (1.24).
9. The shot blasting machine pellet screening apparatus of claim 1, wherein: the linear screen body device further comprises a wear-resistant lining plate (4.2), the wear-resistant lining plate (4.2) is installed inside the single-layer double-mesh screen body (1.15), and the high position and the low position are flush with the screen (4.4).
10. The shot blast machine pellet screening apparatus of any one of claims 1-9, wherein: still include second floor platform (1.5), security fence a (1.3), security fence b (1.6), stair a (1.4), stair b (1.26), platform stand (1.1) is fixed subaerial, second floor platform (1.5) is installed on support (3.1), security fence a (1.3) is installed on first floor platform (1.2), security fence b (1.6) is installed on second floor platform (1.5), install between first floor platform (1.2) and second floor platform (1.5) stair a (1.4), install between first floor platform (1.2) and ground stair b (1.26).
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| CN202010875075.XA CN114101025A (en) | 2020-08-27 | 2020-08-27 | Shot screening device of shot blasting machine |
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| CN202010875075.XA CN114101025A (en) | 2020-08-27 | 2020-08-27 | Shot screening device of shot blasting machine |
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