CN214490132U - Noise reduction device for roller sand removal, impurity removal and polishing - Google Patents

Noise reduction device for roller sand removal, impurity removal and polishing Download PDF

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Publication number
CN214490132U
CN214490132U CN202120588618.XU CN202120588618U CN214490132U CN 214490132 U CN214490132 U CN 214490132U CN 202120588618 U CN202120588618 U CN 202120588618U CN 214490132 U CN214490132 U CN 214490132U
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roller
connecting rod
polishing
opening
plugging
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CN202120588618.XU
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吴昌友
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Shanxi Qingxu Beizhu Radiator Co ltd
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Shanxi Qingxu Beizhu Radiator Co ltd
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Abstract

The utility model discloses a device of making an uproar falls is used in cylinder sand removal, clear impurity, polishing, include: the roller type rotary drum comprises an accommodating main body with an opening and a plugging assembly for plugging the opening, wherein the roller is fixedly arranged in the accommodating main body, and a feed port and a discharge port of the roller are communicated with the outside through the opening; the plugging assembly comprises: the movable plugging plate, the plugging frame and the accommodating main body form a closed space together; the utility model can limit the noise generated by the operation equipment in operation in a closed space to a great extent, inhibit the infinite propagation path of the noise in the air to a great extent, and reduce the interference and harm degree of the industrial noise to the surrounding environment; the method is suitable for the field of noise reduction of industrial equipment.

Description

Noise reduction device for roller sand removal, impurity removal and polishing
Technical Field
The utility model relates to a technical field of industrial equipment production, concretely relates to cylinder sand removal, clear impurity, polishing are with falling device of making an uproar.
Background
At present, in some machining places, particularly large-scale machine manufacturing and processing factories, large-scale machines are often used for polishing, sand removal, crushing, vibration, screening and other operations, and although the effects of finishing the operation of the large-scale machines are good, serious noise pollution can be generated in the operation process. For example, when the manufactured metal parts are sanded or polished, the metal parts are put into a drum, and the metal parts collide and roll with each other by the high-speed rotation of the drum, so that the surface roughness of the metal parts is reduced, and a bright and flat surface is obtained. In this process, the noise emitted from the inside of the drum can be heard over a long distance, which can seriously affect the physical health of factory workers and surrounding residents.
SUMMERY OF THE UTILITY MODEL
To the not enough that exists in the correlation technique, the utility model discloses the technical problem that will solve lies in: the noise reduction device for roller sand cleaning can limit noise generated by working equipment in a closed space to a great extent, inhibit an infinite propagation path of the noise in the air to a great extent and reduce interference and harm degree of industrial noise to the surrounding environment.
In order to solve the technical problem, the utility model discloses a technical scheme does: the utility model provides a cylinder sand removal, clear impurity, polishing are with falling device of making an uproar, includes: the roller type rotary drum comprises an accommodating main body with an opening and a plugging assembly for plugging the opening, wherein the roller is fixedly arranged in the accommodating main body, and a feed port and a discharge port of the roller are communicated with the outside through the opening; the plugging assembly comprises: enclose and locate shutoff frame on the lateral wall of holding the main part opening part and set up the portable shutoff board on the shutoff frame, portable shutoff board, shutoff frame form the enclosure space with holding the main part together.
Preferably, a blanking port is formed in a bottom plate of the plugging frame, a movable plate is arranged at the blanking port, and the movable plate can open or close the blanking port under the driving of the driving assembly; the driving assembly is arranged at the bottom of the plugging frame and is provided with a power end and a driving end, one end of the power end is connected with an external power source, the other end of the power end is connected with one end of the driving end, and the other end of the driving end is connected with the movable plate.
Preferably, both sides of the lower portion of the blanking port are respectively provided with two sliding grooves, and both ends of the movable plate are respectively located in the two sliding grooves and can freely slide in the sliding grooves.
Preferably, the shape and size of the movable plate are matched with the blanking port, and the movable plate is arranged at the blanking port in an openable manner through a pin shaft.
Preferably, the driving assembly further comprises a fixed end, one end of the fixed end is installed at the bottom of the plugging frame, and the other end of the fixed end is connected to the connection position of the driving end and the power end.
Preferably, the driving end comprises a first mounting seat and a first connecting rod, the fixed end comprises a second mounting seat and a second connecting rod, and the power end comprises a third connecting rod;
the first mounting seat is fixedly arranged at the bottom of the movable plate, and one end of the first connecting rod is hinged to the first mounting seat; the second mounting seat is fixedly arranged at the bottom of the plugging frame, and one end of the second connecting rod is hinged to the second mounting seat; one end of the third connecting rod is connected with an external power source; the other end of the first connecting rod, the other end of the second connecting rod and the other end of the third connecting rod are hinged together.
Preferably, the periphery of the plugging frame is provided with a circle of plate-shaped mounting pieces.
Preferably, the accommodating main body is further provided with a dust removing opening.
Preferably, the housing body is further provided with an access opening.
The utility model has the advantages of:
1. different from the traditional roller operation environment, the roller is innovatively arranged in the accommodating main body, and because the accommodating main body is in a closed state in the roller operation process, the noise generated in the roller operation process is limited in the closed space to a greater extent, the propagation of the noise in the air is reduced, and the interference and harm degree of industrial noise to the environment are reduced.
2. When the roller discharges materials after the operation is finished, the materials are discharged in a mode that the materials directly fall out from a material inlet and a material outlet of the roller, and in the discharging process, the materials with certain weight collide with the bottom of the blocking frame, so that the bottom plate of the blocking frame is inevitably damaged after a long time, the sealing performance of the accommodating main body is damaged to a certain extent, and the noise reduction effect of the whole device is reduced;
based on this defect, the present case has proposed and has opened the blanking mouth on the bottom plate of shutoff frame, the solution that sets up the fly leaf in blanking mouth department, under the conventional state, the fly leaf is that the blanking mouth is blocked, when needs blanking, open the fly leaf through drive assembly, the material passes the blanking mouth from the business turn over mouth of cylinder and falls out, the ejection of compact is finished the back rethread drive assembly and is closed the fly leaf, the collision of material and shutoff frame bottom plate has been avoided, alleviate the wearing and tearing of device part, guarantee to hold the closure of main part, and then the noise reduction of whole device has been ensured.
3. As a preferable scheme, a circle of plate-shaped mounting pieces are arranged on the periphery of the plugging frame, and the plugging component is fixed at the opening of the accommodating main body through the plate-shaped mounting pieces, so that the mounting firmness and stability of the plugging component are enhanced on one hand, and the closing performance of the accommodating main body is enhanced to a certain extent on the other hand.
4. The in-process of cleaning sand can produce a large amount of dust at the cylinder operation, sets up the dust removal mouth in this case on holding the main part, can regularly clear up the inside dust that holds the main part through the dust removal mouth.
5. As a preferable scheme, the accommodating main body is further provided with an access through which personnel can enter the accommodating main body for overhauling or cleaning.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings. Like reference numerals refer to like parts throughout the drawings. The drawings are not intended to be drawn to scale in actual dimensions, emphasis instead being placed upon illustrating the principles of the invention.
Fig. 1 is an assembly schematic view of a roller sand-cleaning, impurity-cleaning, polishing noise reduction device provided in an embodiment of the present invention in one direction;
FIG. 2 is an enlarged view taken at A in FIG. 1;
fig. 3 is a schematic structural diagram of a plugging assembly of a noise reduction device for cleaning sand, impurities and polishing of a roller according to an embodiment of the present invention;
FIG. 4 is an enlarged view of FIG. 3 at B;
fig. 5 is a schematic structural view of a plugging assembly of a noise reduction device for cleaning sand, impurities and polishing of a roller according to an embodiment of the present invention;
fig. 6 is an assembly schematic view of another direction of the noise reduction device for drum cleaning, impurity removal and polishing according to the embodiment of the present invention;
in the figure: 10 is the body of holding, 101 is the opening, 102 is the dust removal mouth, 103 is the access & exit, 20 is the shutoff subassembly, 201 is the shutoff frame, 202 is portable shutoff board, 2011 is the blanking mouth, 2012 is the fly leaf, 2013 is the round pin axle, 2014 is the slabby installed part, 203 is the drive assembly, 2031 is the first mount pad, 2032 is the first connecting rod, 2033 is the second mount pad, 2034 is the second connecting rod, 2035 is the third connecting rod, 204 is the spout, 30 is the cylinder.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention; based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Next, the present invention will be described in detail with reference to the schematic drawings, and in the detailed description of the embodiments of the present invention, for convenience of illustration, the enlarged view showing the device structure will not be enlarged partially according to the general scale, and the schematic drawings are only examples, and should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
Example one
The embodiment discloses a device of making an uproar falls in cylinder sand removal, clear impurity, polishing, as shown in fig. 1, fig. 2, a device of making an uproar falls in cylinder sand removal, clear impurity, polishing can include: the drum 30 is fixedly installed inside the accommodating main body 10, and a feed and discharge port of the drum 30 is communicated with the outside through the opening 101; the occlusion assembly 20 can include: the portable sealing device comprises a sealing frame 201 arranged on the outer side wall of the opening of the containing body 10 in a surrounding mode, and a movable sealing plate 202 arranged on the sealing frame 201, wherein the movable sealing plate 202, the sealing frame 201 and the containing body 10 form a closed space together.
Specifically, the opening 101 on the containing body 10 is used for feeding and discharging the drum 30. The shape of the blocking frame 201 may be square or circular as long as it can surround the opening 101. The movable plugging plate 202 is of a movable design, and the arrangement mode of the movable plugging plate on the plugging frame 201 is not limited; two sliding grooves can be respectively arranged on two outer side edges of the plugging frame 201, two side edges of the movable plugging plate 202 are respectively positioned in the two sliding grooves and can move along the guiding direction of the sliding grooves, of course, the moving direction of the movable plugging plate 202 can be up and down, left and right, or other directions, and the moving mode of the movable plugging plate 202 can be controlled manually or electrically; besides the above-mentioned "guide rail type", the arrangement manner of the movable blocking plate 202 on the blocking frame 201 may be a "flip" type, or other forms in the prior art, as long as the opening 101 can be sealed, and will not be described herein again.
In specific implementation, the size, shape and manufacturing material of the accommodating main body 10 are not limited, and may be determined according to the actual use environment and the size and shape of the drum 30, and for a drum with a small volume, the accommodating main body 10 may be a closed box, and for a large drum, the accommodating main body may be a closed house structure. The arrangement of the drum 30 inside the accommodating main body 10 is not limited, and the drum 30 may be erected by arranging a mounting bracket inside the accommodating main body 10, for example. Further, in order to enhance the noise reduction effect, a sound absorbing device may be provided inside the receiving body 10.
In the practical application, when cylinder 30 carries out the ejection of compact after the operation finishes, the ejection of compact mode of material is that the business turn over material mouth from cylinder 30 directly falls out, at the in-process of ejection of compact, the material that has certain weight can collide the bottom of shutoff frame 201, and the time has grown and must lead to the fact the damage to the bottom plate of shutoff frame 201, destroys the closure that holds main part 10 to a certain extent, reduces the noise reduction of whole device.
In order to solve the above-mentioned drawbacks, the present embodiment provides a preferable solution: as shown in fig. 3, a blanking port 2011 is formed on a bottom plate of the blocking frame 201, a movable plate 2012 is disposed at the blanking port 2011, and the movable plate 2012 can open or close the blanking port 2011 under the driving of the driving assembly 203; the driving assembly 203 is arranged at the bottom of the plugging frame 201, the driving assembly 203 is provided with a power end and a driving end, one end of the power end is connected with an external power source, the other end of the power end is connected with one end of the driving end, and the other end of the driving end is connected with the movable plate 2012.
More preferably, the driving assembly 203 further has a fixed end, one end of the fixed end is installed at the bottom of the plugging frame 201, and the other end is connected to the connection between the driving end and the power end.
Still preferably, as shown in fig. 4, the driving end includes a first mounting seat 2031 and a first connecting rod 2032, the fixing end includes a second mounting seat 2033 and a second connecting rod 2034, and the power end includes a third connecting rod 2035; the first mounting seat 2031 is fixedly disposed at the bottom of the movable plate 2012, and one end of the first connecting rod 2032 is hinged to the first mounting seat 2031; the second mounting seat 2033 is fixedly disposed at the bottom of the plugging frame 201, and one end of the second connecting rod 2034 is hinged to the second mounting seat 2033; one end of the third connecting rod 2035 is connected to an external power source; the other end of the first connecting rod 2032, the other end of the second connecting rod 2034, and the other end of the third connecting rod 2035 are hinged to each other.
In this embodiment, the movable plate 2012 is arranged in the following manner: two sliding grooves 204 are respectively arranged on two sides of the lower portion of the blanking port 2011, and two ends of the movable plate 2012 are respectively located in the two sliding grooves 204 and can freely slide in the sliding grooves 204. In a normal state, the movable plate 2012 is sealed to block the blanking port 2011; when the blanking is needed, an external power source is started, the external power source pulls the third connecting rod 2035 downwards, the third connecting rod 2035 drives the first connecting rod 2032 and the second connecting rod 2034 to move downwards, in the process of downward movement of the third connecting rod 2035, the first connecting rod 2032 drives the movable plate 2012 to move towards the inner side of the bottom plate of the plugging frame 201 along the sliding groove 204, the blanking port 2011 is exposed, the material falls out of the roller 30 from the blanking port 2011, after the discharging is finished, the external power source is controlled to push the third connecting rod 2035 upwards, the third connecting rod 2035 pushes the first connecting rod 2032 and the second connecting rod 2034 to move upwards, in the process of upward movement of the third connecting rod 2035, the first connecting rod 2032 drives the movable plate 2012 to move towards the outer side of the bottom plate of the plugging frame 201 along the sliding groove 204, and the blanking port 2032011 is closed. The collision of material and shutoff frame 201 bottom plate has been avoided in above-mentioned design, alleviates the wearing and tearing of device part, guarantees to hold the closure of main part 10, and then has ensured the noise reduction of whole device.
Preferably, the periphery of the plugging frame 201 is provided with a ring of plate-shaped mounting pieces 2014. The fixing of the plugging assembly 20 at the opening 101 of the receiving body 10 by the plate-shaped mounting member 2014 enhances the mounting firmness and stability of the plugging assembly 20 on the one hand and also enhances the closure of the receiving body 10 to some extent on the other hand.
Preferably, as shown in fig. 6, the accommodating main body 10 is further provided with a dust removing opening 102. Since a large amount of dust is generated during the operation of the drum 30 for cleaning the sand, the dust removing opening 102 is provided in the accommodating main body 10, and the dust inside the accommodating main body 10 can be periodically cleaned through the dust removing opening 102.
Preferably, the containing body 10 is also provided with an access opening 103. Through the doorway 103, a person can access the inside of the receiving body 10 for inspection or cleaning.
Example two
Compared with the first embodiment, the difference of the present embodiment is that the movable plate 2012 is installed in a different manner, as shown in fig. 5, in the present embodiment, the shape and size of the movable plate 2012 are matched with the blanking port 2011, and the movable plate 2012 is openably and closably disposed at the blanking port 2011 through a pin 2013.
Similarly, in a normal state, the movable plate 2012 is sealed to block the blanking port 2011; when the blanking is needed, an external power source is started, the external power source pulls the third connecting rod 2035 downwards, the third connecting rod 2035 drives the first connecting rod 2032 and the second connecting rod 2034 to move downwards, in the process of the downward movement of the third connecting rod 2035, the first connecting rod 2032 drives the free end (non-hinged end) of the movable plate 2012 to move downwards, that is, the movable plate 2012 is turned downwards, the blanking port 2011 is exposed, the material falls out of the blanking port 2011 after coming out of the roller 30, after the discharging is finished, the external power source is controlled to push the third connecting rod 2035 upwards, the third connecting rod 2035 pushes the first connecting rod 2032 and the second connecting rod 2034 to move upwards, in the process of the upward movement of the third connecting rod 2035, the first connecting rod 2032 pushes the movable plate 2012 to cover the blanking port 2011.
Before the work, it is necessary to put the drum 30 in the accommodating main body 10 in advance; opening the movable blocking plate 202 to expose the opening 101, feeding the material into the roller 30, closing the movable blocking plate 202 after the feeding is finished, checking that the dust removing port 102 and the access 103 on the accommodating main body 10 are in a closed state to ensure that the accommodating main body 10 is in a closed state, and then starting the power source of the roller 30 to start the operation; after the operation of the roller 30 is finished, the movable blocking plate 202 is opened again to expose the opening 101, the external power source is started, the external power source controls the driving assembly 203 to open the movable plate 2012, and the material passes through the blanking port 2011 from the feed and discharge port of the roller 30 and falls out, so that the material discharge can be completed; after the discharging is finished, the driving assembly 203 is controlled by an external power source to close the movable plate 2012, so that the next roller operation process can be performed.
Different from the traditional roller operation environment, the roller 30 is innovatively arranged in the accommodating main body 10, and because the accommodating main body 10 is in a closed state in the operation process of the roller 30, the noise generated in the operation process of the roller 30 is greatly limited in the closed space, the transmission of the noise in the air is reduced, and the interference and harm degree of the industrial noise to the environment are reduced. Meanwhile, the bottom plate of the plugging frame 201 is provided with the blanking port 2011, and the blanking port 2011 is provided with the movable plate 2012, so that the impact of the material and the bottom plate of the plugging frame 201 is avoided, the abrasion of the device parts is reduced, the sealing performance of the main body 10 is guaranteed, the noise reduction effect of the whole device is guaranteed, and the high-efficiency plugging device has high industrial practicability.
In the description of the present invention, it is to be understood that the terms "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the terms "embodiment one," "embodiment two," etc. mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments. In addition, "one", "two", and the like in the above embodiments are used to distinguish the embodiments, and do not represent the merits of the embodiments.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (9)

1. The utility model provides a device of making an uproar falls is used in sand removal, clear impurity, polishing of cylinder which characterized in that: the method comprises the following steps: the drum type container comprises a containing main body (10) with an opening (101) and a blocking assembly (20) for blocking the opening (101), wherein the drum (30) is fixedly arranged inside the containing main body (10), and a feeding and discharging port of the drum (30) is communicated with the outside through the opening (101);
the occlusion assembly (20) comprises: enclose and locate shutoff frame (201) on the lateral wall of holding main part (10) opening part and set up portable shutoff board (202) on shutoff frame (201), portable shutoff board (202), shutoff frame (201) and holding main part (10) form the enclosure space together.
2. The noise reduction device for roller sand removal, impurity removal and polishing as claimed in claim 1, wherein: a blanking port (2011) is formed in the bottom plate of the blocking frame (201), a movable plate (2012) is arranged at the blanking port (2011), and the movable plate (2012) can be driven by the driving assembly (203) to open or close the blanking port (2011);
the driving assembly (203) is arranged at the bottom of the plugging frame (201), the driving assembly (203) is provided with a power end and a driving end, one end of the power end is connected with an external power source, the other end of the power end is connected with one end of the driving end, and the other end of the driving end is connected with the movable plate (2012).
3. The noise reduction device for roller sand removal, impurity removal and polishing as claimed in claim 2, wherein: two sliding grooves (204) are respectively formed in two sides of the lower portion of the blanking port (2011), and two ends of the movable plate (2012) are respectively located in the two sliding grooves (204) and can freely slide in the sliding grooves (204).
4. The noise reduction device for roller sand removal, impurity removal and polishing as claimed in claim 2, wherein: the shape and the size of fly leaf (2012) with blanking mouth (2011) phase-match, fly leaf (2012) can locate through round pin axle (2013) with opening and shutting blanking mouth (2011) department.
5. The device of any one of claims 2 to 4 for removing sand, impurities and noise of a roller, comprising: the driving assembly (203) is further provided with a fixed end, one end of the fixed end is installed at the bottom of the plugging frame (201), and the other end of the fixed end is connected to the connection position of the driving end and the power end.
6. The noise reduction device for roller sand removal, impurity removal and polishing as claimed in claim 5, wherein: the driving end comprises a first mounting seat (2031) and a first connecting rod (2032), the fixed end comprises a second mounting seat (2033) and a second connecting rod (2034), and the power end comprises a third connecting rod (2035);
the first installation seat (2031) is fixedly arranged at the bottom of the movable plate (2012), and one end of the first connecting rod (2032) is hinged to the first installation seat (2031); the second mounting seat (2033) is fixedly arranged at the bottom of the plugging frame (201), and one end of the second connecting rod (2034) is hinged on the second mounting seat (2033); one end of the third connecting rod (2035) is connected with an external power source; the other end of the first connecting rod (2032), the other end of the second connecting rod (2034) and the other end of the third connecting rod (2035) are hinged together.
7. The device of any one of claims 1 to 4 for removing sand, impurities and noise from a roller and polishing the roller, wherein: the periphery of the plugging frame (201) is provided with a circle of plate-shaped mounting pieces (2014).
8. The device of any one of claims 1 to 4 for removing sand, impurities and noise from a roller and polishing the roller, wherein: the accommodating main body (10) is also provided with a dust removing opening (102).
9. The device of any one of claims 1 to 4 for removing sand, impurities and noise from a roller and polishing the roller, wherein: the containing body (10) is also provided with an access opening (103).
CN202120588618.XU 2021-03-23 2021-03-23 Noise reduction device for roller sand removal, impurity removal and polishing Active CN214490132U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120588618.XU CN214490132U (en) 2021-03-23 2021-03-23 Noise reduction device for roller sand removal, impurity removal and polishing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120588618.XU CN214490132U (en) 2021-03-23 2021-03-23 Noise reduction device for roller sand removal, impurity removal and polishing

Publications (1)

Publication Number Publication Date
CN214490132U true CN214490132U (en) 2021-10-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202120588618.XU Active CN214490132U (en) 2021-03-23 2021-03-23 Noise reduction device for roller sand removal, impurity removal and polishing

Country Status (1)

Country Link
CN (1) CN214490132U (en)

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