CN109704019B - Articulated split type weighing feeder - Google Patents
Articulated split type weighing feeder Download PDFInfo
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- CN109704019B CN109704019B CN201910060418.4A CN201910060418A CN109704019B CN 109704019 B CN109704019 B CN 109704019B CN 201910060418 A CN201910060418 A CN 201910060418A CN 109704019 B CN109704019 B CN 109704019B
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- 238000005303 weighing Methods 0.000 title claims abstract description 221
- 239000000463 material Substances 0.000 claims description 35
- 230000000903 blocking effect Effects 0.000 claims description 23
- 239000003245 coal Substances 0.000 abstract description 53
- 230000005484 gravity Effects 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- MUZQPDBAOYKNLO-RKXJKUSZSA-N oxycodone hydrochloride Chemical compound [H+].[Cl-].O=C([C@@H]1O2)CC[C@@]3(O)[C@H]4CC5=CC=C(OC)C2=C5[C@@]13CCN4C MUZQPDBAOYKNLO-RKXJKUSZSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model provides a articulated split type weighing feeder, relates to feeding, weighing technical field, including conveyer belt type conveyor, conveyor is including bearing the mounting bracket of conveying assembly, its characterized in that, the mounting bracket includes the fixed section of fixing below weighing feeder hopper and is located the weighing section of conveyor output, and the fixed section is articulated through the articulated assembly with the relative one end of weighing section, and the articulated shaft of articulated assembly is in the intermediate position of two-layer conveyer belt of conveyor in vertical direction, leaves the clearance that supplies fixed section and weighing section relative rotation between fixed section and the weighing section; the structure of the hinged split type weighing feeder ensures that the weighing data of the weighing sensor avoids the influence of the bin pressure of the coal bin, and can provide more accurate and reliable calculation basis for the calculation of the coal feeding amount of the hinged split type weighing feeder.
Description
Technical field:
the invention relates to the technical field of feeding and weighing, in particular to a hinged split type weighing feeder.
The background technology is as follows:
the weighing type coal feeder is widely applied to underground coal mines, is arranged below a coal bunker, and calculates the conveying amount of coal through measurement data of a weighing sensor. The traditional weighing feeder in the prior art mainly comprises a weighing sensor arranged below a weighing idler of a conveying device of the weighing feeder, so that the weighing of coal materials is realized. However, in the actual use process, coal in the coal bunker is directly pressed on a conveying device of the weighing feeder, and taking the weighing feeder adopting a belt conveyor as the conveying device as an example, the coal in the coal bunker is pressed on a belt, and the bunker pressure of the coal bunker can greatly influence the weighing result of the weighing sensor, so that the weighing error is larger. The problem that the measurement data of a weighing sensor is affected by the bin pressure of a coal bin commonly exists in a traditional weighing coal feeder in the prior art, and thus the weighing inaccuracy is caused.
The invention comprises the following steps:
in order to solve the technical problems, the invention provides a hinged split weighing feeder which can avoid the influence of weighing data of a coal bunker pressure weighing sensor.
The invention is realized by the following technical scheme:
the hinged split weighing feeder comprises a conveyer belt type conveyer device, wherein the conveyer device comprises a mounting frame for bearing a conveying assembly, and is characterized in that the mounting frame comprises a fixed section fixed below a hopper of the weighing feeder and a weighing section positioned at an output end of the conveyer device, one opposite ends of the fixed section and the weighing section are hinged through a hinge assembly, a hinge shaft of the hinge assembly is positioned at the middle position of two layers of conveyer belts of the conveyer device in the vertical direction, and a gap for the relative rotation of the fixed section and the weighing section is reserved between the fixed section and the weighing section; and a weighing sensor acting on the weighing section.
In another aspect of the invention, the hopper and the blanking housing of the weighing feeder are fixed above the conveyor, and the load cell is supported at the bottom of the weighing section.
In another aspect of the invention, the load cell is supported at the bottom of the end of the weighing segment remote from the hinge shaft.
In another aspect of the invention, a hopper and a material blocking shell of the weighing feeder are fixed above the conveying device, the weighing sensor is hung at the bottom of the coal blocking shell, and the weighing section is hung on the weighing sensor.
In another aspect of the invention, the weighing feeder further comprises a preset number of hanging plates I fixed on the roadway roof, the hopper of the weighing feeder is fixed at the coal outlet of the coal bunker, one end of the material blocking shell of the weighing feeder is fixedly connected with the hopper, and the other end of the material blocking shell of the weighing feeder is fixedly connected with the hanging plates I; the coal blocking device further comprises a preset number of hanging plates II, and the hanging plates II are fixedly connected between the coal blocking shell and the fixing section.
In another aspect of the invention, a material blocking shell of the weighing feeder is of a split structure consisting of a first shell and a second shell, wherein the first shell is arranged above the weighing section and is fixedly connected with the weighing section through a hanging plate III, and the second shell is fixedly arranged above the fixing section; the weighing sensor is hung at the bottom end of the hanging plate IV, and the first shell is hung on the weighing sensor.
In another aspect of the invention, the first housing is suspended from the load cell at an end remote from the hinge axis.
In another aspect of the invention, the weighing feeder further comprises a preset number of hanging plates I fixed on the roadway roof, the hopper of the weighing feeder is fixed at the coal outlet of the coal bunker, one end of the second shell is fixedly connected with the hopper, and the other end of the second shell is fixedly connected with the hanging plates I; the novel hanging device further comprises a preset number of hanging plates II, and the hanging plates II are fixedly connected between the second shell and the fixed section.
In another aspect of the present invention, a calculation unit electrically connected to the load cell and calculating the coal supply amount based on the weighing data of the load cell is further included.
In another aspect of the invention, rollers at both ends of the conveying device are respectively mounted on the fixed section and the weighing section.
The beneficial effects of the invention are as follows: the structure of the hinged split weighing feeder ensures that the weighing data of the weighing sensor avoids the influence of the bin pressure of the coal bin, and can provide more accurate and reliable calculation basis for the calculation of the coal feeding amount of the hinged split weighing feeder.
Description of the drawings:
fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.
FIG. 3 is an enlarged view of hanging plate I in examples 1 and 2 of the present invention.
Fig. 4 is a schematic structural diagram of embodiment 3 of the present invention.
FIG. 5 is an enlarged view of the hanger plate I and hanger plate IV in example 3 of the present invention.
Fig. 6 is a side view of the hinge assembly structure of the present invention.
In the accompanying drawings: 1. hanging plates I, 2, a material blocking shell, 3, a roller, 4, a weighing sensor, 5, a weighing section, 6, a hinge assembly, 7, a fixed section, 8, a carrier roller, 9, hanging plates II, 10, a hopper, 11, a coal bunker bottom, 12, hanging plates III, 13, a first shell, 14, a second shell, 15, hanging plates IV, 16, a hinge shaft, 17 and a hinge plate.
The specific embodiment is as follows:
embodiments of the present invention will be further described with reference to the accompanying drawings and examples:
in the description of the present invention, it should be understood that the description of indicating the orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description and to simplify the description, rather than to indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the scope of protection of the present invention.
In the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
The utility model provides a articulated split type weighing feeder, includes conveyer belt conveyor, conveyer is belt conveyor or first area conveyer, conveyer is including bearing the mounting bracket of conveying component such as mounting roller 3, conveyer belt, bearing roller 8, the mounting bracket is including fixing the fixed section 7 and being located the weighing section 5 of conveyer output in weighing feeder hopper 10 below, and the fixed section 7 is articulated through hinge assembly 6 with the relative one end of weighing section 5, and hinge assembly 6 includes the articulated slab 17 of the preset quantity of fixing on fixed section 7 and weighing section 5 respectively and installs the articulated shaft 16 on articulated slab 17. The hinge shaft 16 is positioned at the middle position of two layers of conveyer belts of the conveyer in the vertical direction, and a gap for the relative rotation of the fixed section 7 and the weighing section 5 is reserved between the fixed section 7 and the weighing section 5; and a load cell 4 acting on the weighing segment 5. The hopper 10 and the material blocking shell 2 of the weighing feeder are fixed above the conveying device, and the weighing sensor 4 is supported at the bottom of the weighing section 5. The load cell 4 is supported at the bottom of the end of the weighing segment 5 remote from the hinge shaft 16. The weighing feeder comprises a roadway top plate, a hopper 10, a material blocking shell 2, a hanging plate I1, a material blocking shell and a material blocking shell, wherein the roadway top plate is fixedly arranged on the roadway top plate, the material blocking shell is fixedly connected with the hopper 10 through bolts, and the material blocking shell is fixedly connected with the hanging plate I1 through bolts; still include the hanging plate II 9 of predetermineeing quantity, hanging plate II 9 passes through bolted connection and fixes between keeping off material casing 2 and fixed section 7. The weighing control system further comprises a calculating unit which is electrically connected with the weighing sensor 4 and calculates the coal feeding amount according to the weighing data of the weighing sensor 4, wherein the calculating unit is a weighing control instrument with the model number TR700BC of longtec brand. The rollers 3 at two ends of the conveying device are respectively arranged on the fixed section 7 and the weighing section 5, and the rollers 3 on the weighing section 5 are driven rollers 3.
When the hinged split type weighing feeder operates, coal in a coal bin can be pressed on a conveying belt above the fixed section 7, and the weighing sensor 4 is only subjected to the pressure formed by the weighing section 5, the roller 3 on the weighing section 5, the carrier roller 8, the conveying belt, the coal on the conveying belt above the weighing section 5 and the like under the action of gravity, so that the influence of the pressure of the coal bin is avoided. Because the hinge shaft 16 is positioned at the middle position of two layers of conveyer belts of the conveyer in the vertical direction, when the weighing section 5 slightly rotates around the hinge shaft 16, the whole tension of the conveyer belt cannot be changed, and the influence of the whole tension of the conveyer belt on the measurement result of the weighing sensor 4 is avoided. The structure of the hinged split weighing feeder ensures that the weighing data of the weighing sensor 4 avoids the influence of the bin pressure of the coal bin, and can provide more accurate and reliable calculation basis for the calculation of the coal feeding amount of the hinged split weighing feeder.
The weight of the weighing sensor 4 is GP when no material is conveyed, and the instantaneous weight of the weighing sensor 4 is GZ when the material is conveyed, and the calculation formula of the instantaneous weight GL of the material on the weighing section 5 of the weighing and metering feeder is as follows: gl=k (GZ-GP), where K is a proportionality coefficient, and the value of K is a ratio of a horizontal distance from a center of gravity of an integral body formed by the weighing section 5, the roller 3 and the carrier roller 8 on the weighing section 5, and a corresponding part of the conveyor belt on the weighing section 5 to a horizontal distance from a center of the hinge shaft 16 to a supporting point of the weighing sensor 4, and the material running speed of the weighing feeder is V, and the running time is T, and the traffic G of the weighing feeder is g=gl·v·t. In the actual running process, if errors are found in G, the errors can be corrected by inputting the actual traffic G', and the software system can automatically correct the proportional coefficient K to correct the errors.
In addition, compared with the technical scheme that two independent conveying devices are adopted to avoid the influence of bin pressure on weighing, the hinged split weighing feeder is small in occupied space, convenient to install and maintain and suitable for underground coal mines.
Example 2
The utility model provides a articulated split type weighing feeder, includes conveyer belt conveyor, conveyer is belt conveyor or first area conveyer, conveyer is including bearing the mounting bracket of conveying component such as mounting roller 3, conveyer belt, bearing roller 8, the mounting bracket is including fixing the fixed section 7 and being located the weighing section 5 of conveyer output in weighing feeder hopper 10 below, and the fixed section 7 is articulated through hinge assembly 6 with the relative one end of weighing section 5, and hinge assembly 6 includes the articulated slab 17 of the preset quantity of fixing on fixed section 7 and weighing section 5 respectively and installs the articulated shaft 16 on articulated slab 17. The hinge shaft 16 is positioned at the middle position of two layers of conveyer belts of the conveyer in the vertical direction, and a gap for the relative rotation of the fixed section 7 and the weighing section 5 is reserved between the fixed section 7 and the weighing section 5; and a load cell 4 acting on the weighing segment 5. The hopper 10 and the material blocking shell 2 of the weighing feeder are fixed above the conveying device, the weighing sensor 4 is hung at the bottom of the material blocking shell 2, and the weighing section 5 is hung on the weighing sensor 4. The weighing feeder comprises a roadway top plate, a hopper 10, a material blocking shell 2, a hanging plate I1, a material blocking shell and a material blocking shell, wherein the roadway top plate is fixedly arranged on the roadway top plate, the material blocking shell is fixedly connected with the hopper 10 through bolts, and the material blocking shell is fixedly connected with the hanging plate I1 through bolts; still include the hanging plate II 9 of predetermineeing quantity, hanging plate II 9 passes through bolted connection and fixes between keeping off material casing 2 and fixed section 7. The weighing control instrument is characterized by further comprising a calculating unit which is electrically connected with the weighing sensor 4 and calculates the coal feeding amount according to the weighing data of the weighing sensor 4, wherein the calculating unit is a weighing control instrument with the model number TR700BC of longtec brand. The rollers 3 at two ends of the conveying device are respectively arranged on the fixed section 7 and the weighing section 5, and the rollers 3 on the weighing section 5 are driven rollers 3.
When the hinged split type weighing feeder operates, coal in a coal bin can be pressed on a conveying belt above the fixed section 7, and the weighing sensor 4 is only subjected to the pressure formed by the weighing section 5, the roller 3 on the weighing section 5, the carrier roller 8, the conveying belt, the coal on the conveying belt above the weighing section 5 and the like under the action of gravity, so that the influence of the pressure of the coal bin is avoided. Because the hinge shaft 16 is positioned at the middle position of two layers of conveyer belts of the conveyer in the vertical direction, when the weighing section 5 slightly rotates around the hinge shaft 16, the whole tension of the conveyer belt cannot be changed, and the influence of the whole tension of the conveyer belt on the measurement result of the weighing sensor 4 is avoided. The structure of the hinged split weighing feeder ensures that the weighing data of the weighing sensor 4 avoids the influence of the bin pressure of the coal bin, and can provide more accurate and reliable calculation basis for the calculation of the coal feeding amount of the weighing coal feeder.
The weight of the weighing sensor 4 is GP when no material is conveyed, and the instantaneous weight of the weighing sensor 4 is GZ when the material is conveyed, and the calculation formula of the instantaneous weight GL of the material on the weighing section 5 of the weighing and metering feeder is as follows: gl=k (GZ-GP), where K is a proportionality coefficient, and the value of K is a ratio of a horizontal distance from a center of gravity of an integral body formed by the weighing section 5, the roller 3 and the carrier roller 8 on the weighing section 5, and a corresponding part of the conveyor belt on the weighing section 5 to a horizontal distance from a center of the hinge shaft 16 to a hanging point of the weighing sensor 4, where the material running speed of the hinge split type weighing feeder is V, and the running time is T, and the transport capacity G of the hinge split type weighing feeder is g=gl·v·t. In the actual running process, if errors are found in G, the errors can be corrected by inputting the actual traffic G', and the software system can automatically correct the proportional coefficient K to correct the errors.
In addition, compared with the technical scheme that two independent conveying devices are adopted to avoid the influence of bin pressure on weighing, the hinged split weighing feeder is small in occupied space, convenient to install and maintain and suitable for underground coal mines.
Example 3
The utility model provides a articulated split type weighing feeder, includes conveyer belt conveyor, conveyer is belt conveyor or first area conveyer, conveyer is including bearing the mounting bracket of conveying component such as mounting roller 3, conveyer belt, bearing roller 8, the mounting bracket is including fixing the fixed section 7 and being located the weighing section 5 of conveyer output in weighing feeder hopper 10 below, and the fixed section 7 is articulated through hinge assembly 6 with the relative one end of weighing section 5, and hinge assembly 6 includes the articulated slab 17 of the preset quantity of fixing on fixed section 7 and weighing section 5 respectively and installs the articulated shaft 16 on articulated slab 17. The hinge shaft 16 is positioned at the middle position of two layers of conveyer belts of the conveyer in the vertical direction, and a gap for the relative rotation of the fixed section 7 and the weighing section 5 is reserved between the fixed section 7 and the weighing section 5; and a load cell 4 acting on the weighing segment 5. The material blocking shell 2 of the weighing feeder is of a split structure consisting of a first shell 13 and a second shell 14, wherein the first shell 13 is arranged above the weighing section 5 and is fixedly connected with the weighing section 5 through a hanging plate III 12, and the second shell 14 is fixedly arranged above the fixing section 7; the weighing sensor is characterized by further comprising a hanging plate IV 15, the hanging plate IV 15 is hung on a roadway top plate above the first shell 13, the weighing sensor 4 is hung at the bottom end of the hanging plate IV 15, the first shell 13 is hung on the weighing sensor 4, and the tail end part of the second shell 14 extends into the first shell 13. One end of the first shell 13 far away from the hinge shaft 16 is hung on the weighing sensor 4, and the weighing device further comprises a preset number of hanging plates I1 fixed on a roadway top plate, a hopper 10 of the weighing feeder is fixed at a coal outlet of a coal bunker, one end of the second shell 14 is fixedly connected with the hopper 10 through bolts, and the other end of the second shell is fixedly connected with the hanging plates I1 through bolts; the novel hanging device further comprises a preset number of hanging plates II 9, and the hanging plates II 9 are fixedly arranged between the second shell 14 and the fixed section 7 through bolt connection. The weighing control instrument is characterized by further comprising a calculating unit which is electrically connected with the weighing sensor 4 and calculates the coal feeding amount according to the weighing data of the weighing sensor 4, wherein the calculating unit is a weighing control instrument with the model number TR700BC of longtec brand. The rollers 3 at two ends of the conveying device are respectively arranged on the fixed section 7 and the weighing section 5, and the rollers 3 on the weighing section 5 are driven rollers 3.
When the hinged split type weighing feeder operates, coal in a coal bin can be pressed on a conveying belt above the fixed section 7, and the weighing sensor 4 is only affected by the pressure formed by the first shell 13, the weighing section 5, the hanging plate III 12, the roller 3 on the weighing section 5, the carrier roller 8, the conveying belt, the coal on the conveying belt above the weighing section 5 and the like under the action of gravity, and is not affected by the pressure of the coal bin. Because the hinge shaft 16 is positioned at the middle position of two layers of conveyer belts of the conveyer in the vertical direction, when the weighing section 5 slightly rotates around the hinge shaft 16, the whole tension of the conveyer belt cannot be changed, and the influence of the whole tension of the conveyer belt on the measurement result of the weighing sensor 4 is avoided. The structure of the hinged split weighing feeder ensures that the weighing data of the weighing sensor 4 avoids the influence of the bin pressure of the coal bin, and can provide more accurate and reliable calculation basis for the calculation of the coal feeding amount of the hinged split weighing feeder.
The weight of the weighing sensor 4 is GP when no material is conveyed, and the instantaneous weight of the weighing sensor 4 is GZ when the material is conveyed, and the calculation formula of the instantaneous weight GL of the material on the weighing section 5 of the weighing and metering feeder is as follows: gl=k (GZ-GP), where K is a proportionality coefficient, and the value of K is a ratio of a horizontal distance from a center of gravity of an integral body formed by the first housing 13, the weighing section 5, the hanging plate iii 12, the roller 3 and the carrier roller 8 on the weighing section 5, and a corresponding part of the conveyor belt on the weighing section 5 to a horizontal distance from a center of the hinge shaft 16 to a hanging point of the weighing sensor 4, and the material running speed of the hinge split type weighing feeder is V, and the running time is T, and then the transport capacity G of the hinge split type weighing feeder is g=gl·v·t. In the actual running process, if errors are found in G, the errors can be corrected by inputting the actual traffic G', and the software system can automatically correct the proportional coefficient K to correct the errors.
In addition, compared with the technical scheme that two independent conveying devices are adopted to avoid the influence of bin pressure on weighing, the hinged split weighing feeder is small in occupied space, convenient to install and maintain and suitable for underground coal mines.
In summary, the foregoing description is only of the preferred embodiments of the present invention, and all equivalent changes and modifications made in accordance with the claims should be construed to fall within the scope of the invention.
Claims (2)
1. The hinged split weighing feeder comprises a conveyer belt type conveyer device, wherein the conveyer device comprises a mounting frame for bearing a conveying assembly, and is characterized in that the mounting frame comprises a fixed section fixed below a hopper of the weighing feeder and a weighing section positioned at an output end of the conveyer device, one opposite ends of the fixed section and the weighing section are hinged through a hinge assembly, and a gap for the relative rotation of the fixed section and the weighing section is reserved between the fixed section and the weighing section; the weighing section is provided with a weighing sensor acting on the weighing section; the hinge shaft of the hinge assembly is positioned at the middle position of two layers of conveying belts of the conveying device in the vertical direction; the material blocking shell of the weighing feeder is of a split structure formed by a first shell and a second shell, the first shell is arranged above the weighing section and is fixedly connected with the weighing section through a hanging plate III, and the second shell is fixedly arranged above the fixing section; the weighing sensor is hung at the bottom end of the hanging plate IV, the first shell is hung on the weighing sensor, and the tail end part of the second shell extends into the first shell; one end of the first shell, which is far away from the hinge shaft, is hung on the weighing sensor; the weighing feeder comprises a first shell, a second shell, a hanging plate I, a weighing feeder, a weighing hopper, a hanging plate I, a hopper and a hopper, wherein the hanging plate I is fixed on a roadway top plate in a preset number; the device also comprises a preset number of hanging plates II, wherein the hanging plates II are fixedly connected between the second shell and the fixed section; the rollers at two ends of the conveying device are respectively arranged on the fixed section and the weighing section.
2. The articulated split weighing feeder of claim 1, further comprising a computing unit electrically connected to the load cell and configured to compute a feed rate based on the load cell's weighing data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910060418.4A CN109704019B (en) | 2019-01-22 | 2019-01-22 | Articulated split type weighing feeder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910060418.4A CN109704019B (en) | 2019-01-22 | 2019-01-22 | Articulated split type weighing feeder |
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| Publication Number | Publication Date |
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| CN109704019A CN109704019A (en) | 2019-05-03 |
| CN109704019B true CN109704019B (en) | 2024-03-22 |
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| CN201910060418.4A Active CN109704019B (en) | 2019-01-22 | 2019-01-22 | Articulated split type weighing feeder |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111891730B (en) * | 2020-08-10 | 2022-04-22 | 长春市华宇机电输送设备有限公司 | Reciprocating coal feeder with iron removal function |
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| CN108861659A (en) * | 2017-05-12 | 2018-11-23 | 刘素华 | A kind of metering batcher revolves Lianping except the method for storehouse pressure and rotation Lianping press state Weighing feeder except storehouse |
| CN209506932U (en) * | 2019-01-22 | 2019-10-18 | 济宁东达机电有限责任公司 | A kind of hinged split type Weighing feeder |
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2019
- 2019-01-22 CN CN201910060418.4A patent/CN109704019B/en active Active
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|---|---|---|---|---|
| JPH10288472A (en) * | 1997-04-11 | 1998-10-27 | Hitachi Cable Ltd | Preheating method for metal thin sheet and equipment therefor |
| CN102009827A (en) * | 2010-11-05 | 2011-04-13 | 刘素华 | Impact-free interference removal high-precision gravimetric feeder |
| CN103398766A (en) * | 2013-07-10 | 2013-11-20 | 云南昆船设计研究院 | Superwide electronic belt conveyor scale |
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