CN211586825U - Roll gap adjusting device of roller type flour mill - Google Patents
Roll gap adjusting device of roller type flour mill Download PDFInfo
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- CN211586825U CN211586825U CN201921881007.3U CN201921881007U CN211586825U CN 211586825 U CN211586825 U CN 211586825U CN 201921881007 U CN201921881007 U CN 201921881007U CN 211586825 U CN211586825 U CN 211586825U
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- fine adjustment
- adjustment screw
- roll
- overload protection
- seat
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Abstract
The utility model discloses a roll distance adjusting device of roller flour mill, including fixed mounting at the movable roll bearing frame of movable roll lateral part, fixed mounting at the fixed roll bearing frame of fixed roll lateral part, fixed mounting is on the organism and is connected roll distance guiding mechanism on movable roll bearing frame upper portion, fixed mounting is on the organism and is connected the separation and reunion rolling mechanism of movable roll bearing frame lower part and the separation and reunion rolling spring of connection between fixed roll bearing frame and movable roll bearing frame. The utility model discloses rational in infrastructure, convenient to use adopts face-to-face locking mode, when needs adjustment, loosens and compresses tightly the handle, is clearance fit between stationary plane and the rotation face. When the adjustment is not needed, the pressing handle is screwed down, and the fixed surface and the rotating surface are in interference fit; the locking mode of purely mechanical locking can ensure the stability of the roll clearance under complex conditions and ensure better grinding effect.
Description
Technical Field
The utility model relates to a milling machine technical field especially relates to a roll distance adjusting device of roller type milling machine.
Background
For a roll gap adjusting device of a roller mill, three operating states must be considered:
in normal operation, it is necessary to be able to adjust precisely the nip, i.e. the grinding gap, between the two rolls.
In the absence of material, the rollers must automatically disengage a certain distance, otherwise the rollers could collide with each other and cause damage.
When large foreign objects such as nuts enter the nip, the pressure between the rolls increases dramatically, requiring an overload protection to counteract the impact.
Long-term use has shown that purely mechanical means are more reliable for adjusting the roll gap than other, for example automatic adjusting devices. Although the adjustment itself is simple, achieving this goal is a rather complicated process. The prior roll clearance adjusting device, particularly the locking of a fine adjusting screw rod, adopts a point-to-point locking mode or pneumatic locking, and the roll clearance is often loosened under the conditions of vibration or air leakage, so that the change of the roll clearance influences the grinding effect.
Accordingly, the task of the utility model is to design a roll clearance adjusting device of manual operation mode, grind the gap for accurate adjustment and provide the solution.
SUMMERY OF THE UTILITY MODEL
Based on the above technical background, the utility model aims at providing a roll distance adjusting device of roller flour mill can ensure to guarantee the stability of roll distance under the complex circumstance, provides probably for guaranteeing to grind the effect.
In order to achieve the above technical objective, the utility model discloses the technical scheme who takes is:
the utility model provides a roll distance adjusting device of roll milling machine, including the movable roll bearing frame of fixed mounting at the movable roll lateral part, the fixed roll bearing frame of fixed mounting at the fixed roll lateral part, fixed mounting is on the organism and is connected the roll distance guiding mechanism on movable roll bearing frame upper portion, fixed mounting is on the organism and is connected the separation and reunion rolling mechanism of movable roll bearing frame lower part and connect the separation and reunion rolling spring between fixed roll bearing frame and movable roll bearing frame.
As a further improvement of the present invention, the roll clearance adjusting mechanism comprises a fine adjustment fixing seat for fixedly connecting the machine body, a fine adjustment screw rod movably inserted in the fine adjustment fixing seat, a fine adjustment screw sleeve screwed on the fine adjustment screw rod, a pull rod inserted in the upper part of the movable roller bearing seat, and a pressing mechanism which is sleeved outside the fine adjustment screw rod and is positioned outside the machine body;
the front end of the pull rod is hinged on the fine adjustment screw sleeve through an elastic cylindrical pin.
As a further improvement, the other end of the fine adjustment screw rod is positioned outside the machine body, and the hand wheel is fixedly connected with the end.
As a further improvement of the present invention, the pressing mechanism is fixedly mounted on the fine adjustment fixing seat through the locking seat fixing seat, and the pressing mechanism includes a fine adjustment screw locking seat fixedly connected to the locking seat fixing seat and a pressing handle for pressing or loosening the fine adjustment screw locking seat;
when the pressing handle presses the fine adjustment screw locking seat, the inner side fixing surface of the fine adjustment screw locking seat and the outer side rotating surface of the fine adjustment screw form interference fit, so that the fine adjustment screw cannot be locked to rotate;
when the pressing handle loosens the fine adjustment screw locking seat, the inner side fixing surface of the fine adjustment screw locking seat and the outer side rotating surface of the fine adjustment screw form clearance fit, so that the rotation of the fine adjustment screw is not limited when the fine adjustment screw is loosened.
As a further improvement of the utility model, the rear part of the pull rod is also provided with an overload protection device;
the overload protection device comprises an overload protection support fixedly connected to the pull rod, an overload protection pressing plate sleeved on the overload protection support, an overload protection spring sleeved on the overload protection support and located on the rear side of the overload protection pressing plate, a round nut fixed on the overload protection support and located on the front side of the overload protection pressing plate, and a stop washer sleeved on the overload protection support and located between the overload protection pressing plate and the round nut.
As a further improvement of the present invention, the pull rod is fixed with a fastening bolt located at the rear side of the overload protection support for limiting the position of the rear end of the overload protection support on the pull rod.
As a further improvement, the overload protection clamp plate fixedly connected with pull rod seat, the front end of pull rod seat is fixed with the cone, set up the bell jar corresponding with the cone on the loose roll bearing frame, the cone is located the bell jar and forms the activity articulated.
As a further improvement of the utility model, the fine-tuning fixing seat is provided with a through hole, and a fulcrum pin shaft is fixedly arranged in the through hole;
the fulcrum pin shaft comprises a pin shaft cylinder and a yielding through hole which is formed in the pin shaft cylinder and is used for the fine adjustment screw to penetrate through;
as a further improvement, be provided with round thrust ball bearing between locking seat fixing base and the fine setting screw rod, be fixed with the thrust ball bearing stop collar of definite thrust ball bearing position on the locking seat fixing base.
As a further improvement of the utility model, the clutch rolling mechanism comprises a clutch rolling cylinder fixed at the inner side of the machine body, an adjusting lever with one end hinged on a piston rod of the clutch rolling cylinder, an eccentric wheel rotatably connected to the lower part of a movable roller bearing seat and a movable roller rotating shaft fixedly connected on the eccentric wheel;
the other end of the adjusting lever is connected with the eccentric wheel through a key on the rotating shaft of the movable roller, the clutch rolling mechanism structure increases the force applying stroke of the clutch rolling cylinder to form a boosting structure, the clutch rolling cylinder can be selected to be small in size for clutch rolling, the clutch rolling state is more stable, and the swing amplitude of the movable roller is reduced through the eccentric wheel, so that the movable roller and the fixed roller can be conveniently adjusted in the clutch rolling state in a small space in the machine.
Compared with the prior art, the utility model discloses the beneficial effect who gains as follows:
the utility model discloses rational in infrastructure, convenient to use adopts face-to-face locking mode, when needs adjustment, loosens and compresses tightly the handle, is clearance fit between stationary plane and the rotation face. When the adjustment is not needed, the pressing handle is screwed down, and the fixed surface and the rotating surface are in interference fit; the locking mode of purely mechanical locking can ensure the stability of the roll clearance under complex conditions and ensure better grinding effect.
Drawings
Fig. 1 is a schematic side view of the present invention;
FIG. 2 is a schematic view of the axial measurement structure of the present invention;
FIG. 3 is a schematic structural view of the movable roller rotating shaft and the eccentric wheel of the present invention;
FIG. 4 is a schematic cross-sectional view of the roll gap adjusting mechanism of the present invention;
fig. 5 is a schematic structural view of the fulcrum pin shaft of the present invention;
fig. 6 is a schematic structural diagram of the overload protection device of the present invention;
FIG. 7 is a schematic view of a tapered head structure of the pull rod seat of the present invention;
fig. 8 is a schematic view of the tapered groove structure of the movable roller bearing seat of the present invention.
Wherein: 1 machine body, 2 fixed rollers, 3 fixed roller bearing blocks, 4 fine adjustment screw rod locking blocks, 5 hand wheels, 6 pressing handles, 7 locking block fixing blocks, 8 fine adjustment fixing blocks, 9 fulcrum pin shafts, 91 pin shaft cylinders, 92 abdicating through holes, 10 fine adjustment screw rods, 11 fine adjustment screw sleeves, 12 elastic cylindrical pins, 13 pull rods, 14 pull rod seats, 15 overload protection devices, 16 fastening bolts, 17 movable rollers, 18 movable roller bearing blocks, 19 eccentric wheels, 20 adjusting levers, 21 movable roller rotating shafts, 22 clutch rolling springs, 23 clutch rolling cylinders, 24 thrust ball bearing limiting sleeves, 25 thrust ball bearings, 26 overload protection supports, 27 overload protection springs, 28 overload protection pressing plates, 29 stop washers, 30 round nuts, 31 conical heads and 32 conical grooves.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is obvious that the embodiments described in the figures are only some embodiments of the present application, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it is also to be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of the stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
As shown in fig. 1 and 2, a roll gap adjusting device of a roll mill comprises a movable roll chock 18 fixedly installed at a side portion of a movable roll 17, a fixed roll chock 3 fixedly installed at a side portion of a fixed roll 2, a roll gap adjusting mechanism fixedly installed on a machine body 1 and connected to an upper portion of the movable roll chock 18, a clutch rolling mechanism fixedly installed on the machine body 1 and connected to a lower portion of the movable roll chock 18, and a clutch rolling spring 22 connected between the fixed roll chock 3 and the movable roll chock 18; the fixed roller 2 is fixed on the machine body 1 through the fixed roller bearing seats 3 at two ends, and the fixed roller 2 has only one rotational degree of freedom relative to the fixed roller bearing seats 3; the movable roller 17 has a degree of freedom of oscillation and a degree of freedom of rotation.
Further, the roll clearance adjusting mechanism comprises a fine adjustment fixed seat 8 used for fixedly connecting the machine body 1, a fine adjustment screw 10 movably sleeved in the fine adjustment fixed seat 8, a fine adjustment screw sleeve 11 in threaded connection with the fine adjustment screw 10, a pull rod 13 sleeved on the upper part of the movable roller bearing seat 18 in a penetrating manner, and a pressing mechanism sleeved outside the fine adjustment screw 10 and positioned outside the machine body 1;
the front end of the pull rod 13 is hinged on the fine adjustment screw sleeve 11 through an elastic cylindrical pin 12.
Further, the other end of the fine adjustment screw rod 10 is located outside the machine body 1, and the hand wheel 5 is fixedly connected to the other end of the fine adjustment screw rod, and specifically, the hand wheel 5 can be fixed on the fine adjustment screw rod 10 through an elastic cylindrical pin.
Further, as shown in fig. 4, the pressing mechanism is fixedly mounted on the fine-tuning fixing seat 8 through the locking seat fixing seat 7, and the pressing mechanism includes a fine-tuning screw locking seat 4 fixedly connected to the locking seat fixing seat 7 and a pressing handle 6 for pressing or loosening the fine-tuning screw locking seat 4;
when the pressing handle 6 presses the fine adjustment screw locking seat 4, the inner side fixed surface of the fine adjustment screw locking seat 4 and the outer side rotating surface of the fine adjustment screw 10 form interference fit, so that the fine adjustment screw 10 can not be locked to rotate;
when the pressing handle 6 loosens the fine adjustment screw locking seat 4, the inner side fixed surface of the fine adjustment screw locking seat 4 and the outer side rotating surface of the fine adjustment screw 10 form clearance fit, so that the rotation of the fine adjustment screw 10 is not limited when the fine adjustment screw is loosened.
Further, as shown in fig. 6, an overload protection device 15 is further disposed at the rear portion of the pull rod 13;
the overload protection device 15 comprises an overload protection support 26 fixedly connected to the pull rod 13, an overload protection pressing plate 28 sleeved on the overload protection support 26, an overload protection spring 27 sleeved on the overload protection support 26 and located behind the overload protection pressing plate 28, a round nut 30 fixed on the overload protection support 26 and located in front of the overload protection pressing plate 28, and a stop washer 29 sleeved on the overload protection support 26 and located between the overload protection pressing plate 28 and the round nut 30, wherein the overload protection spring 27 is a compression spring and is compressed to a certain size for fixing.
Further, a fastening bolt 16 is fixed to the drawbar 13 at the rear side of the overload protection support 26 to define the position of the rear end of the overload protection support 26 on the drawbar 13.
Further, as shown in fig. 7 and 8, the overload protection pressing plate 28 is fixedly connected with a pull rod seat 14, a tapered head 31 is fixedly arranged at the front end of the pull rod seat 14, a tapered groove 32 corresponding to the tapered head 31 is formed in the movable roller bearing seat 18, and the tapered head 31 is located in the tapered groove 32 to form a movable hinge joint.
Further, as shown in fig. 5, the fine-tuning fixing seat 8 is provided with a through hole, and a fulcrum pin shaft 6 is fixedly installed in the through hole; the fulcrum pin shaft 6 can rotate freely in the through hole.
The fulcrum pin shaft 6 comprises a pin shaft cylinder 91 and an abdicating through hole 92 for the fine adjustment screw rod 10 to pass through;
the end face of the pin shaft cylinder 91 is rotatably connected with the inner side wall of the through hole.
Further, be provided with round thrust ball bearing 25 between locking seat fixing base 7 and the fine setting screw rod 10, locking seat fixing base 7 is fixed with the thrust ball bearing stop collar 24 of injecing thrust ball bearing 25 position, and thrust ball bearing 25 can reduce fine setting screw rod 10 when rotating with the frictional resistance of locking seat fixing base 7, and is more laborsaving when finely tuning.
Further, as shown in fig. 3, the clutch rolling mechanism includes a clutch rolling cylinder 23 fixed inside the machine body 1, an adjusting lever 20 with one end hinged to a piston rod of the clutch rolling cylinder 23, an eccentric wheel 19 rotatably connected to a lower portion of the movable roller bearing block 18, and a movable roller rotating shaft 21 fixedly connected to the eccentric wheel 19;
the other end of the adjusting lever 20 is connected with the eccentric wheel 19 through a key on the rotating shaft 21 of the movable roller, the clutch rolling mechanism structure increases the force applying stroke of the clutch rolling cylinder to form a boosting structure, the clutch rolling cylinder can be selected to be small in size for clutch rolling, the clutch rolling state is more stable, and the swing amplitude of the movable roller is reduced through the eccentric wheel, so that the movable roller and the fixed roller can be conveniently adjusted in the clutch rolling state in a small space in the machine.
The working process of the utility model is as follows:
based on functional requirements, the movable roller has two states of separation rolling and combination rolling in the working process, the adjustment of the state of the separation and combination rolling is controlled by a separation and combination rolling mechanism, and the adjustment of the rolling distance is executed in the combination rolling state. When the roll clearance is adjusted by using the roll clearance adjusting mechanism, firstly, the pressing handle 6 loosens the fine adjustment screw locking seat 4, and the inner side fixed surface of the fine adjustment screw locking seat 4 and the outer side rotating surface of the fine adjustment screw 10 form clearance fit, so that the fine adjustment screw 10 is loosened without limiting the rotation of the fine adjustment screw; then, the hand wheel 5 is rotated clockwise, the fine adjustment screw 10 screws the fine adjustment screw sleeve close by utilizing threads, corresponding force is exerted on the movable roller bearing block 18 through the overload protection device, the movable roller bearing block 18 drives the movable roller 17 to swing around the eccentric wheel 19 to be close to the fixed roller 2, and therefore the roll gap adjustment process is achieved; or the hand wheel 5 is rotated anticlockwise, the fine adjustment screw 10 rotates the fine adjustment screw sleeve far by utilizing threads, corresponding force is exerted on the movable roller bearing seat 18 through the clutch rolling spring 22, the movable roller bearing seat 18 drives the movable roller 17 to swing around the eccentric wheel 19 to be far away from the fixed roller 2, and therefore the rolling distance adjusting process is achieved. When the required roll distance is adjusted, the pressing handle 6 loosens the fine adjustment screw locking seat 4, and the inner side fixed surface of the fine adjustment screw locking seat 4 and the outer side rotating surface of the fine adjustment screw 10 form clearance fit, so that the fine adjustment screw 10 is loosened without limiting the rotation of the fine adjustment screw. The locking mode of purely mechanical locking can ensure the stability of the roll clearance under complex conditions and ensure better grinding effect.
Claims (10)
1. The utility model provides a roll clearance adjusting device of roller flour mill which characterized in that: the automatic rolling device comprises a movable roller bearing seat (18) fixedly installed on the side of a movable roller (17), a fixed roller bearing seat (3) fixedly installed on the side of a fixed roller (2), a roll distance adjusting mechanism fixedly installed on a machine body (1) and connected to the upper portion of the movable roller bearing seat (18), a clutch rolling mechanism fixedly installed on the machine body (1) and connected to the lower portion of the movable roller bearing seat (18), and a clutch rolling spring (22) connected between the fixed roller bearing seat (3) and the movable roller bearing seat (18).
2. A roll gap adjusting apparatus for a roll mill according to claim 1, wherein: the roll clearance adjusting mechanism comprises a fine adjustment fixing seat (8) used for fixedly connecting the machine body (1), a fine adjustment screw rod (10) movably sleeved in the fine adjustment fixing seat (8), a fine adjustment screw sleeve (11) in threaded connection with the fine adjustment screw rod (10), a pull rod (13) sleeved on the upper part of a movable roller bearing seat (18) in a penetrating manner, and a pressing mechanism sleeved outside the fine adjustment screw rod (10) and positioned outside the machine body (1);
the front end of the pull rod (13) is hinged on the fine adjustment threaded sleeve (11) through an elastic cylindrical pin (12).
3. A roll gap adjusting apparatus for a roll mill according to claim 2, wherein: the other end of the fine adjustment screw rod (10) is positioned outside the machine body (1), and the other end is fixedly connected with a hand wheel (5).
4. A roll gap adjusting apparatus for a roll mill according to claim 2, wherein: the pressing mechanism is fixedly arranged on the fine-adjustment fixing seat (8) through a locking seat fixing seat (7), and comprises a fine-adjustment screw locking seat (4) fixedly connected to the locking seat fixing seat (7) and a pressing handle (6) used for pressing or loosening the fine-adjustment screw locking seat (4);
when the fine adjustment screw locking seat (4) is pressed by the pressing handle (6), the inner side fixing surface of the fine adjustment screw locking seat (4) and the outer side rotating surface of the fine adjustment screw (10) form interference fit, so that the fine adjustment screw (10) cannot rotate;
when the pressing handle (6) loosens the fine adjustment screw locking seat (4), the inner side fixing surface of the fine adjustment screw locking seat (4) and the outer side rotating surface of the fine adjustment screw (10) form clearance fit, so that the fine adjustment screw (10) is loosened without limiting the rotation of the fine adjustment screw.
5. A roll gap adjusting apparatus for a roll mill according to claim 2, wherein: the rear part of the pull rod (13) is also provided with an overload protection device (15);
overload protection device (15) are including overload protection support (26) of fixed connection on pull rod (13), overload protection clamp plate (28) of suit on overload protection support (26), suit just are located overload protection spring (27) of overload protection clamp plate (28) rear side on overload protection support (26), fix on overload protection support (26) and be located overload protection clamp plate (28) front side round nut (30) and suit on overload protection support (26) and be located overload protection clamp plate (28) and round nut (30) between stop washer (29).
6. A roll gap adjusting apparatus for a roll mill according to claim 5, wherein: a fastening bolt (16) is fixed on the pull rod (13) and is positioned at the rear side of the overload protection support (26) and used for limiting the position of the rear end of the overload protection support (26) on the pull rod (13).
7. A roll gap adjusting apparatus for a roll mill according to claim 5, wherein: the overload protection pressing plate (28) is fixedly connected with a pull rod seat (14), a conical head (31) is fixedly arranged at the front end of the pull rod seat (14), a conical groove (32) corresponding to the conical head (31) is formed in the movable roller bearing seat (18), and the conical head (31) is located in the conical groove (32) to form movable hinge joint.
8. A roll gap adjusting apparatus for a roll mill according to claim 2, wherein: the fine tuning fixing seat (8) is provided with a through hole, and a fulcrum pin shaft (9) is fixedly arranged in the through hole;
the fulcrum pin shaft (9) comprises a pin shaft cylinder (91) and a yielding through hole (92) which is formed in the pin shaft cylinder (91) and is used for the fine adjustment screw rod (10) to penetrate through;
the end face of the pin shaft cylinder (91) is rotatably connected with the inner side wall of the through hole.
9. A roll gap adjusting apparatus for a roll mill according to claim 4, wherein: a circle of thrust ball bearing (25) is arranged between the locking seat fixing seat (7) and the fine adjustment screw rod (10), and a thrust ball bearing limiting sleeve (24) for limiting the position of the thrust ball bearing (25) is fixed on the locking seat fixing seat (7).
10. A roll gap adjusting apparatus for a roll mill according to claim 1, wherein: the clutch rolling mechanism comprises a clutch rolling cylinder (23) fixed on the inner side of the machine body (1), an adjusting lever (20) with one end hinged on a piston rod of the clutch rolling cylinder (23), an eccentric wheel (19) rotatably connected to the lower part of the movable roller bearing seat (18) and a movable roller rotating shaft (21) fixedly connected to the eccentric wheel (19);
the other end of the adjusting lever (20) is connected with the eccentric wheel (19) through a key on the rotating shaft (21) of the movable roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921881007.3U CN211586825U (en) | 2019-11-04 | 2019-11-04 | Roll gap adjusting device of roller type flour mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921881007.3U CN211586825U (en) | 2019-11-04 | 2019-11-04 | Roll gap adjusting device of roller type flour mill |
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| Publication Number | Publication Date |
|---|---|
| CN211586825U true CN211586825U (en) | 2020-09-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921881007.3U Active CN211586825U (en) | 2019-11-04 | 2019-11-04 | Roll gap adjusting device of roller type flour mill |
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| Country | Link |
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| CN (1) | CN211586825U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111215188A (en) * | 2019-11-04 | 2020-06-02 | 河北苹乐面粉机械集团有限公司 | Roll gap adjusting device of roller type flour mill |
| CN114273008A (en) * | 2022-03-07 | 2022-04-05 | 浙江鑫旺钒业控股有限公司 | Rolling equipment suitable for vanadium ore powder process |
-
2019
- 2019-11-04 CN CN201921881007.3U patent/CN211586825U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111215188A (en) * | 2019-11-04 | 2020-06-02 | 河北苹乐面粉机械集团有限公司 | Roll gap adjusting device of roller type flour mill |
| CN114273008A (en) * | 2022-03-07 | 2022-04-05 | 浙江鑫旺钒业控股有限公司 | Rolling equipment suitable for vanadium ore powder process |
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