CN212513158U - High-precision impulse type meter - Google Patents
High-precision impulse type meter Download PDFInfo
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- CN212513158U CN212513158U CN202020726570.XU CN202020726570U CN212513158U CN 212513158 U CN212513158 U CN 212513158U CN 202020726570 U CN202020726570 U CN 202020726570U CN 212513158 U CN212513158 U CN 212513158U
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- 239000000463 material Substances 0.000 claims abstract description 52
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- 238000009434 installation Methods 0.000 claims description 3
- 230000008447 perception Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000013519 translation Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
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Abstract
The utility model discloses a high-precision impulse type measuring instrument; this measurement appearance adopts the torsion blade as the impingement plate, and the atress of impingement plate is even, can avoid measuring error to improve measurement accuracy. This measurement appearance includes: the device comprises a cylinder, a fixed supporting mechanism, a rotating shaft, blades, a pressure sensor and a spring supporting mechanism; the blades are impact plates of the impulse type meter, the number of the blades is more than two, each blade is arranged on the rotating shaft in the same torsional shape, and the more than two blades are uniformly distributed at intervals along the circumferential direction of the cylinder; each blade is provided with a pressure sensor which is used for measuring the tangential component force of the micro-powder material to the blade. And feeding the flow rate and the flow rate calculated by the meter back to a feeding system at the front end in a feedback control system, wherein the feeding system controls the flow rate and the flow rate by adjusting the feeding speed.
Description
Technical Field
The utility model relates to a metering instrument, concretely relates to high accuracy impulse type metering instrument.
Background
The powder material has various kinds, great difference of physical characteristics, and certain difficulty in metering the flow rate and flow of the powder material compared with other fluids, and the common methods are mainly Coriolis flowmeter, impact plate flowmeter and the like. The impact plate type flowmeter has the advantages of clear measuring principle, simple mechanical structure, wide measuring range, wide application range and the like. The basic principle of the traditional impact plate type flowmeter is as follows:
when the powdery material falls from the position with the height of H and impacts a punching plate (a flat plate type measuring plate), the motion of the material is strictly flat throw motion with a certain initial speed (the tangential speed of a conveying belt pulley), the impact angle of the falling material is alpha, and the impact force of the material is alpha
Comprises the following steps:
In the formula: qmMass in unit time, i.e. flow of the powdery material, g is gravitational acceleration, alpha is the impact angle of the material on the impact plate, beta is the included angle between the impact plate and the horizontal plane, v0Is the initial speed of the material when blanking.
It can be seen that when α, β and H are timed, by applying the horizontal component FhThe flow value Q of the material can be obtained by measurementm。
QmAnd FhIs proportional and linear, the size of the material is not influenced by the physical factors (such as density, granularity, humidity and the like) of the material to be measured,is an ideal method for continuous dynamic online measurement of bulk solid materials.
However, in practical application, the impact force of the powdery material on the punching plate (measuring plate) is constantly changed, so that the supporting mechanism is prone to shaking and translating constantly, further metering errors are generated, and metering accuracy is affected.
SUMMERY OF THE UTILITY MODEL
The utility model aims at: aiming at the problems, the high-precision impulse type measuring instrument adopts the torsion blade as the impact plate, the impact plate is uniformly stressed, and the measuring errors caused by shaking and translation of the supporting mechanism can be avoided, so that the measuring precision is improved.
The high-precision impulse type meter comprises: the device comprises a cylinder, a fixed supporting mechanism, a rotating shaft, blades, a pressure sensor and a spring supporting mechanism;
the bottom of the rotating shaft is supported by the fixed supporting mechanism, so that the rotating shaft is vertically arranged on the central axis of the cylinder body;
the blades are impact plates of the impulse type meter, the number of the impact plates is more than two, each blade is arranged on the rotating shaft in the same torsional shape, namely one long edge of each blade is fixedly connected with the rotating shaft, and the other long edge of each blade is in the torsional shape, so that two short edges of each blade are staggered; more than two blades are uniformly distributed at intervals along the circumferential direction of the cylinder;
spring supporting mechanisms which correspond to the blades one by one are arranged on the outer circumference of the cylinder body, and the spring supporting mechanisms balance tangential component force of micro powder materials on the impact force of the blades through transverse deformation;
and each blade is provided with a pressure sensor which is used for sensing the tangential component of the impact force of the micro powder material on the blade.
As a preferred mode of the present invention, the cylinder includes: the metering device comprises a cylinder metering section and an inlet guide section arranged at the top of the cylinder metering section, wherein the inlet guide section is horn-shaped, and the cylinder metering section is of a straight cylinder structure; and the micro powder material is poured into the cylinder metering section from the inlet flow guide section.
As an optimized mode of the utility model, the fixed supporting mechanism is horizontally arranged inside the cylinder body and comprises two or more supporting arms positioned in the same horizontal plane.
As an optimized mode of the utility model, more than two the support arm is followed the even interval distribution of circumference of barrel, just support arm and blade one-to-one, every the installation direction of support arm is unanimous with the direction rather than the blade lower extreme minor face that corresponds.
As an optimal mode of the utility model, the rotation axis adopts from last to down by the structure of thin thickening.
As an optimized mode of the utility model, the projected area of all blades from the top down plumb bob adds the projected area sum of rotation axis equals the cross-sectional area of barrel measurement section.
As an optimized mode of the utility model, the inclination angle of the blade is at least larger than the repose angle of the powdery material by 10 degrees.
As an optimized mode of the present invention, the design principle of the blade torsion angle is: so that the normal component of the impact force of the micro powder material on the blade is integral multiple of the tangential component.
In addition, the utility model provides a feedback control system based on high accuracy impulse type measuring instrument, including measuring instrument, pressure transmitter and controller, the measuring instrument is above-mentioned high accuracy impulse type measuring instrument;
the pressure transmitter converts the pressure signal detected by the pressure sensor into a standard electric signal, and then the standard electric signal is sent to the controller after A/D conversion; the controller dynamically calculates the flow speed and the instantaneous flow of the micro-powder material according to the received pressure signal; meanwhile, set range values of flow speed and flow are arranged in the controller, when the calculated flow speed or instantaneous flow of the micro-powder material exceeds the set range, the controller feeds back a control instruction for adjusting the flow speed or flow to a feeding system at the front end, and the feeding system controls the flow speed or flow by adjusting the feeding speed.
The controller is connected with a display device arranged in the feeding system at the front end of the metering instrument; the controller dynamically calculates the flow velocity, the instantaneous flow and the accumulated flow of the micro-powder material according to the received pressure signal and then sends the micro-powder material to the display equipment for real-time display.
Has the advantages that:
(1) the torsion measuring blade is used as an impact plate of the impulse type measuring instrument, the impact plate is stressed uniformly, and measuring errors caused by shaking and translation of the supporting mechanism can be avoided, so that the measuring precision is improved.
(2) The sum of the projection area of the plumb projection of all the blades from top to bottom and the projection area of the rotating shaft is equal to the cross sectional area of the metering section of the cylinder body, so that the metering precision can be further improved, and the principle is as follows: by adopting the arrangement mode, the micro powder material flow can be prevented from leaking from the gaps among the blades, so that the metering instrument cannot sense and influence the metering precision.
(3) The number of the supporting arms in the fixed supporting mechanism is consistent with that of the blades, and the mounting direction of each supporting arm corresponds to the direction of the short side of the lower end of each blade respectively, so that more flow channel spaces exist for materials.
(4) The rotating shaft adopts a structure that the thickness is changed from top to bottom, so that the resistance of longitudinal flow can be reduced, and the stability of the shaft is improved.
Drawings
FIG. 1 is a schematic view of a high precision impulse meter;
FIG. 2 is a schematic view of three blades uniformly distributed along the circumferential direction;
fig. 3 is a block diagram of a control unit.
In the figure: 1-micro powder material; 2-an inlet flow guide section; 3-cylinder metering section; 4-a blade; 41-leaf A; 42-blade B; 43-leaf C; 5-a rotating shaft; 6-fixing a supporting mechanism; 7-a spring support mechanism; 71-moment arm; 72-pressure spring; 8-dynamic and static sealing; 9-a pressure sensor; 11-controller
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1:
the embodiment provides a high-precision physical quantity measuring instrument based on impulse principle in the micro-powder material conveying process, wherein the physical quantity comprises flow speed, flow (the product of the flow speed and the cross section area of a metering section of a cylinder), volume (the total volume of the micro-powder material conveyed within a set time), and mass (the total mass of the micro-powder material conveyed within the set time).
As shown in fig. 1, the high-precision impulse-type measuring instrument for fine powder materials comprises: the device comprises a cylinder, a fixed supporting mechanism 6, a rotating shaft 5, a blade 4, a pressure sensor 9 and a spring supporting mechanism 7;
the cylinder comprises a cylindrical cylinder metering section 3 and an inlet guide section 2 arranged at the top of the cylinder metering section 3, the inlet guide section 2 is in an open design (namely in a horn shape), and the cylinder metering section 3 is in a straight cylinder structure; the micro powder material 1 is poured into the cylinder metering section 3 from the inlet diversion section 2.
The bottom of the rotating shaft 5 is supported by a fixed supporting mechanism 6, so that the rotating shaft 5 is vertically arranged on the central axis of the cylinder metering section 3. Specifically, the method comprises the following steps: the fixed supporting mechanism 6 is horizontally arranged inside the cylinder metering section 3 and comprises more than two supporting arms positioned in the same horizontal plane, the supporting arms are uniformly distributed at intervals along the circumferential direction of the cylinder metering section 3, and the cross sections of the supporting arms are streamline to reduce the resistance of material flow. The top end of the rotating shaft 5 is flush with the top of the cylinder metering section 3; and the rotating shaft 5 adopts a structure that the thickness is changed from top to bottom, so that the resistance of longitudinal flow can be reduced, and the stability of the shaft is improved.
The blade 4 is the impact plate of this impulse type meter, and the quantity is two at least, and blade 4 measures the blade for twisting the form, and every blade 4 all is to twist reverse the form and install on rotation axis 5, and one long limit (vertical) and the rotation axis 5 rigid coupling of blade 4 promptly, another long limit is to twist reverse the form, makes two minor faces (horizontal) of blade 4 stagger certain angle each other. The blades 4 have a tendency to rotate axially around the rotating shaft 5 under the impact force of the fine powder material 1.
In order to make the material have more flow passage spaces, the number of the supporting arms in the fixed supporting mechanism 6 is consistent with that of the blades 4, and the installation direction of each supporting arm respectively corresponds to the direction of the short side of the lower end of each blade 4. In order to make the impact force impact the blades 4 evenly (i.e. without generating an eccentric moment on the rotating shaft 5), the blades are distributed at equal intervals along the circumferential direction of the cylinder metering section 3, in this case, three blades 4 are preferred, and three blades 4 are distributed at equal intervals along the circumferential direction of the rotating shaft 5, so that the corresponding fixed support mechanism 6 has three support arms, and each support arm is consistent with the direction of the lower end short side of one blade 4.
As shown in fig. 2, the length of the cylinder metering section 3 is designed in consideration that the sum of the projected areas of all the blades projected from the top to the bottom plumb (e.g., the projected areas of the blades 41, 42 and 43) and the projected area of the rotation axis is equal to the cross-sectional area of the cylinder metering section 3. That is, when looking down the cylinder from the top, the blades (plus the rotating shaft 5) cover all the cross-sectional area of the cylinder, and there is no overlap between the blades (a slight gap, such as 2mm, may be left between the blades and the wall surface of the cylinder to avoid the friction caused by the contact between the blades and the cylinder wall).
Each blade 4 is provided with a pressure sensor 9, and the pressure sensor 9 is used for measuring the tangential component force F of the impact force of the micro-powder material 1 on the blade 4Tangential direction。
The micro powder material 1 enters a cylinder metering section 3 through an inlet flow guide section 2; the micro powder material 1 is forced in the free falling body motion state
Impacting the twisted blades 4; the force on the blade 4 is divisible in a cylindrical coordinate systemThe solution is divided into three parts: (1) axial component force FAxial directionAlong the axial direction of the cylinder metering section 3 and with the plumb downward; (2) radial component force FRadial direction(FNormal direction) Perpendicular to the axis of the cylinder in the radial/normal direction of the cylinder metering section 3; (3) tangential component force FTangential directionAlong the tangent of the metering section 3 of the cylinder.
Wherein the axial component FAxial directionIs balanced by the fixed supporting mechanism 6; radial component force FRadial direction(FNormal direction) Is balanced by the cylinder metering section 3 and the rotating shaft 5; tangential component force FTangential directionCausing the blades 4 to have a tendency to rotate axially about the axis of rotation 5. Tangential component force FTangential directionIs sensed by the pressure sensor 9 attached to the vane 4 and this rotational tendency is counterbalanced by the spring support mechanism 7. The pressure sensed by the pressure sensor 9 is transmitted to the controller 11; the controller 11 calculates the required physical quantities, such as the flow rate and the flow velocity of the fine powder material 1, from the received pressure signal.
Force of
The calculation of the magnitudes of the three component forces is related to the torsional shape of the blade 4 and the spatial attitude relative to the cylinder metering section 3; the torsion shape and the space attitude are related to the repose angle and the collapse angle of the material. That is, the pitch angle and twist angle of the blade depend on parameters such as the repose angle and collapse angle of the material, and the correlation between the height and cross-sectional area of the metering section is taken into consideration, so that the twist and spatial helical attitude of the blade along with the length of the cylinder and relative to the cylinder are determined.
When designing the blade 4, calculating the length and the inclination angle of the blade 4 (the inclination angle and the torsion angle of each blade are the same) according to the measured repose angle and the collapse angle of the micro-powder material 1, wherein the inclination angle of the blade 4 is generally more than 10 degrees larger than the repose angle of the material; the principle of the twist angle of the blade 4 is: make effort
Is equal to an integer multiple of the tangential component, i.e. FNormal direction＝nFTangential directionWhich isWhere n is a positive integer, so that the spring support mechanism 7 is subjected to a larger part of the force and is susceptible to two components FTangential directionAnd FNormal directionAnd (4) calculating.
Example 2:
in the present embodiment, a feedback control system based on the high-precision impulse-type meter in embodiment 1 is provided, as shown in fig. 3, a pressure transmitter is used to convert a pressure signal detected by a pressure sensor 9 into a standard electrical signal, and then the standard electrical signal is a/D converted and sent to a controller 11; the controller 11 is connected with a display device arranged in the feeding system at the front end of the metering instrument; the controller 11 dynamically calculates the flow velocity, instantaneous flow, accumulated flow and the like of the micro-powder material 1 according to the received pressure signal, and then sends the micro-powder material to the display equipment for real-time display; meanwhile, a set range value of the flow speed/flow is arranged in the controller 11, when the calculated flow speed or instantaneous flow of the micro powder material 1 exceeds the set range, the controller 11 feeds back a control instruction for adjusting the flow speed or flow to a feeding system at the front end, and the feeding system controls the flow speed or flow by adjusting the feeding speed; if the flow rate of the micro-powder material 1 calculated by the controller 11 is larger than the upper limit value of the set range, the controller 11 sends a flow rate reduction control instruction to the feeding system, and the feeding system reduces the feeding speed after receiving the flow rate reduction control instruction.
Therefore, the transportation, metering and control processes of the materials are automatic, and all mechanisms coordinate with each other to complete, so that the production operation is stable.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (8)
1. High accuracy impulse-type meter, its characterized in that includes: the device comprises a cylinder, a fixed supporting mechanism (6), a rotating shaft (5), a blade (4), a pressure sensor (9) and a spring supporting mechanism (7);
the bottom of the rotating shaft (5) is supported by the fixed supporting mechanism (6), so that the rotating shaft (5) is vertically arranged on the central axis of the cylinder body;
the blades (4) are impact plates of the impulse type measuring instrument, the number of the impact plates is more than two, each blade (4) is arranged on the rotating shaft (5) in the same torsional shape, namely one long side of each blade (4) is fixedly connected with the rotating shaft (5), and the other long side of each blade is in the torsional shape, so that two short sides of each blade (4) are staggered; more than two blades (4) are uniformly distributed at intervals along the circumferential direction of the cylinder;
spring supporting mechanisms (7) which correspond to the blades (4) one by one are arranged on the outer circumference of the cylinder, and the tangential component force of the impact force of the micro-powder material (1) on the blades (4) is balanced by the spring supporting mechanisms (7) through transverse deformation;
every all be equipped with pressure sensor (9) on blade (4), pressure sensor (9) are used for perception miropowder material (1) to the tangential component of blade (4) impact force.
2. The high precision impulse meter of claim 1, wherein the cylinder comprises: the device comprises a cylinder metering section (3) and an inlet guide section (2) arranged at the top of the cylinder metering section (3), wherein the inlet guide section (2) is horn-shaped, and the cylinder metering section (3) is of a straight cylinder structure; the micro powder material (1) is poured into the cylinder metering section (3) from the inlet diversion section (2).
3. High precision impulse meter according to claim 1, characterized in, that the fixed support mechanism (6) is mounted horizontally inside the cylinder, comprising more than two support arms in the same horizontal plane.
4. A high-precision impulse meter according to claim 3, characterized in that two or more support arms are evenly spaced along the circumference of the cylinder, and the support arms correspond to the blades (4) one by one, and the installation direction of each support arm is the same as the direction of the short side of the lower end of the corresponding blade (4).
5. A high-precision impulse meter according to claim 1, characterized in that the rotary shaft (5) is of a structure that is tapered from top to bottom.
6. High precision impulse meter according to claim 2, characterized in, that the sum of the projected area of all blades (4) from top to bottom plumb plus the projected area of the rotation axis (5) is equal to the cross sectional area of the cylinder metering section (3).
7. A high precision impulse meter according to claim 1, characterized in that the angle of inclination of the blade (4) is at least 10 ° greater than the powdery material repose angle.
8. A high precision impulse meter according to claim 1, characterized in that the blade (4) twist angle is designed on the basis of: so that the normal component of the impact force of the micro powder material (1) on the blade (4) is integral multiple of the tangential component.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020726570.XU CN212513158U (en) | 2020-05-07 | 2020-05-07 | High-precision impulse type meter |
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| CN202020726570.XU CN212513158U (en) | 2020-05-07 | 2020-05-07 | High-precision impulse type meter |
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| CN212513158U true CN212513158U (en) | 2021-02-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116399409A (en) * | 2023-04-13 | 2023-07-07 | 上海联适导航技术股份有限公司 | Impulse yield measuring device, harvester and impulse yield measuring method |
-
2020
- 2020-05-07 CN CN202020726570.XU patent/CN212513158U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116399409A (en) * | 2023-04-13 | 2023-07-07 | 上海联适导航技术股份有限公司 | Impulse yield measuring device, harvester and impulse yield measuring method |
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Effective date of registration: 20221219 Address after: 114225 Tengao Zhen Lao Qiang Cun, Haicheng City, Anshan City, Liaoning Province Patentee after: Anshan Mingze mechanical equipment Co.,Ltd. Address before: 114225 No.8, Dongxin village, Tengao Town, Haicheng City, Anshan City, Liaoning Province Patentee before: Liaoning Jintian Energy Storage Technology Co.,Ltd. |
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