CN104773481B - Gravimetric Coal Feeders - Google Patents
Gravimetric Coal Feeders Download PDFInfo
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- CN104773481B CN104773481B CN201510154498.1A CN201510154498A CN104773481B CN 104773481 B CN104773481 B CN 104773481B CN 201510154498 A CN201510154498 A CN 201510154498A CN 104773481 B CN104773481 B CN 104773481B
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Abstract
The present invention provides a kind of Gravimetric Coal Feeders, is related to metering feeding device field.Gravimetric Coal Feeders include housing, set in housing by motor-driven roller and conveyer belt, weighing carrier roller is provided with below conveyer belt, surface of shell is provided with first through hole and the second through hole, and weighing carrier roller both ends are provided through first through hole, the first pressure unit of the second through hole and the second pressure unit；Gravimetric Coal Feeders also include first support, second support, the first weighing sensor and the second weighing sensor, first pressure unit is placed in above the first weighing sensor and is connected with the first weighing sensor, and the second pressure unit is placed in above the second weighing sensor and is connected with the second weighing sensor；First support is placed in below the first weighing and sensing and is connected with the first weighing sensor, and second support is placed in below the second weighing and sensing and is connected with the second weighing sensor.Weighing sensor is arranged on hull outside, ensures weighing sensor accurate measurement, is not easy to be smashed by the material of sideslip.
Description
Technical field
The present invention relates to metering feeding device field, in particular to a kind of Gravimetric Coal Feeders.
Background technology
Gravimetric Coal Feeders are for the main to coal equipment of coal-fired station's CFBB and coal-powder boiler.Energy
Enough realizations are continuous, spare to coal, and accurate Weighing is carried out during to coal, and according to boiler combustion control system need
Will, coal-supplying amount is automatically adjusted, actual coal-supplying amount and boiler load is matched.At present have become 12MW, 15MW, 50MW,
135MW, 240MW steam power plant and the main of coal-fired station's 200MW, 300MW, 600MW unit plant give coal equipment.
At present, the Gravimetric Coal Feeders that in the market occurs are mainly the shell by the way that weighing sensor to be arranged on to Gravimetric Coal Feeders
The lower section of internal weighing carrier roller, coal cinder material is weighed so as to realize.
However, using this weighting manner, because the environment of the enclosure interior of Gravimetric Coal Feeders is poor, coal dust often accumulates
It is pressed in below weighing sensor, causes to block up full coal dust between weighing sensor and the base of weighing sensor, cause weighing and sensing
Device stress is untrue, so as to cause metering inaccurate, meanwhile, the weighing sensor circuit of enclosure interior by enclosure interior temperature and
The easy aged deterioration of influence of the complex environments such as humidity, in addition, the coal cinder material that sideslip is scattered on conveyer belt also will easily weigh
Sensor smashes.
The content of the invention
In view of this, the purpose of the embodiment of the present invention is to provide a kind of Gravimetric Coal Feeders, to improve above mentioned problem.
In a first aspect, the embodiments of the invention provide a kind of Gravimetric Coal Feeders, Gravimetric Coal Feeders include housing, support of weighing
Roller, the first weighing sensor and the second weighing sensor, relative two surface of housing are respectively equipped with first through hole and second
Through hole, weighing carrier roller include the first pressure unit and the second pressure unit, and the first pressure unit and the second pressure unit are respectively positioned at support of weighing
The both ends of roller, the first pressure unit pass through first through hole, and the second pressure unit passes through the second through hole；
The Gravimetric Coal Feeders also include being arranged at the first support of the hull outside, second support, the first connector,
Second connector, the 3rd connector and the 4th connector, first pressure unit are placed in the top of first weighing sensor,
First pressure unit is connected with first weighing sensor by first connector, and second pressure unit is placed in institute
The top of the second weighing sensor is stated, second pressure unit is connected with second weighing sensor by second connector
Connect；
The first support is placed in the lower section of first weighing and sensing, the first support and first weighing and sensing
Device is connected by the 3rd connector, and the second support is placed in the lower section of second weighing sensor, described second
Frame is connected with second weighing sensor by the 4th connector.
By the way of weighing sensor to be arranged on to the outside of housing of Gravimetric Coal Feeders, ensure that weighing sensor is weighed
It is more accurate, meanwhile, the service life of weighing sensor circuit is ensure that, in addition, weighing sensor will not be by the biography in housing
The coal cinder material for taking sideslip is sent to smash.
With reference in a first aspect, the embodiments of the invention provide the possible embodiment of the first of first aspect, wherein, institute
The two relative surfaces for stating housing further respectively have third through-hole and fourth hole, are provided with and are used at the third through-hole
The first flange plate of the third through-hole is sealed, the first through hole is located on the first flange plate, and the first through hole
Connected with the third through-hole；It is provided with the fourth hole and is used to sealing the second flange plate of the fourth hole, described the
Two-way hole position is on the second flange plate, and second through hole connects with the fourth hole.
By setting third through-hole and the first flange plate for sealing third through-hole and setting first on first flange plate
Through hole, fourth hole and the second flange plate for sealing fourth hole are set and the second through hole is set on second flange plate, just
Equipment in housing is overhauled.
With reference in a first aspect, the embodiments of the invention provide the possible embodiment of second of first aspect, wherein, institute
Stating Gravimetric Coal Feeders also includes link code calibration equipment, and the weight-hoist device includes the first link code and the second link code, and described first hangs
Code hang on first pressure unit, and second link code hang on second pressure unit.
By setting weight-hoist device, the static check of the degree of accuracy to weighing sensor can be realized, ensures weighing sensor
The accuracy of metering.
It is possible the invention provides the third of first aspect with reference to second of possible embodiment of first aspect
Embodiment, wherein, the Gravimetric Coal Feeders also include the first protective cover and the second protective cover, first weighing sensor,
First link code, first pressure unit and the first support may be contained within first protective cover, and described second claims
Retransmit sensor, second link code, second pressure unit and the second support to may be contained within second protective cover, institute
State the first protective cover to be fixedly connected with the housing, second protective cover is fixedly connected with the housing.
Protective cover is set, weighing sensor can be played a very good protection and Gravimetric Coal Feeders be played close well
Envelope acts on, and is further ensured that weighing sensor is not easy to be damaged, effect of weighing is persistently good.
With reference to the third possible embodiment of first aspect, the embodiments of the invention provide the 4th of first aspect kind
Possible embodiment, wherein, the Gravimetric Coal Feeders also include the first seal pipe and the second seal pipe, first seal pipe
One end be connected with first protective cover, one end of second seal pipe is connected with second protective cover.
Set seal pipe to can effectively improve the protective cover internal environment of Gravimetric Coal Feeders, ensure weighing sensor in protective cover
Internal cleaning, the service life of the equipment effectively extended in protective cover.
With reference to the third possible embodiment of first aspect, the embodiments of the invention provide the 5th of first aspect kind
Possible embodiment, wherein, first protective cover includes the first shield body and the first protection cover-cap, and described first is anti-
Shield body is buckled by tower with first protection cover-cap and is connected, and second protective cover includes the second shield body and second
Protection cover-cap, second shield body are connected with second protection cover-cap by tower button.
Using the connected mode of tower button, it is easy to very easily overhaul weighing sensor and link code verifies.
With reference in a first aspect, the embodiments of the invention provide the possible embodiment of the 6th of first aspect kind, wherein, institute
The aperture for stating first through hole and second through hole is 28mm.
With reference to first aspect first to the 6th kind of possible embodiment in it is any, the invention provides first
7th kind of possible embodiment of aspect, wherein, first connector, second connector, the 3rd connector
It is bolt with the 4th connector.
Using bolt, guarantee is connected firmly and readily removable removed.
Gravimetric Coal Feeders provided in an embodiment of the present invention, using the housing that weighing sensor is arranged on to Gravimetric Coal Feeders
Outside mode, the situation generation that full coal dust is blocked up between weighing sensor and sensor base is avoided, makes weighing sensor meter
Amount is more accurate, meanwhile, the service life of weighing sensor circuit is ensure that, in addition, weighing sensor will not be by the biography in housing
The coal cinder material for taking sideslip is sent to smash.
To enable the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly, and coordinate
Appended accompanying drawing, elaborates.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below by embodiment it is required use it is attached
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore be not construed as pair
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 shows the structural representation for the Gravimetric Coal Feeders that first embodiment of the invention is provided；
Fig. 2 shows the Gravimetric Coal Feeders right view that first embodiment of the invention is provided；
Fig. 3 shows the structural representation for the Gravimetric Coal Feeders that second embodiment of the invention is provided；
Fig. 4 shows the Gravimetric Coal Feeders right view that second embodiment of the invention is provided；
Fig. 5 shows the structural representation for the Gravimetric Coal Feeders that third embodiment of the invention is provided；
Fig. 6 shows the structural blast schematic diagram for the Gravimetric Coal Feeders that third embodiment of the invention is provided；
Fig. 7 shows the Gravimetric Coal Feeders right view that third embodiment of the invention is provided.
Wherein, the corresponding relation between reference and component names is as follows：
Housing 101, the first weighing sensor 201, the second weighing sensor 202, the first pressure unit 203, the second pressure unit
204, first support 205, second support 206, first flange plate 207, second flange plate 208, the first seal pipe 211, second is close
Tube sealing 212, the first link code 213, the second link code 214, the first protective cover 215, the second protective cover 216.
Embodiment
At present, the Gravimetric Coal Feeders that in the market occurs mainly include housing, induction system, metering system, purging system, electricity
Gas control system and warning device etc..Charging aperture is provided with above shell one end, discharging opening is provided with below the housing other end.
The startup motor that induction system includes the conveyer belt being enclosed on two rollers and drives two rollers to rotate.Metering system includes
The velocity sensor on roller, weighing sensor and display device below the weighing carrier roller in housing are arranged on, wherein,
Display device be used for display speed sensor collection rate signal value, weighing sensor collection weight signal value and according to
Rate signal value, weight signal value, the instantaneous delivery value calculated according to rate signal value and weight signal value and accumulative value.
Purging system includes starting motor, two rollers and the chain being enclosed on roller.Electric control system includes frequency-converting control device,
Frequency-converting control device compares according to what boiler combustion system provided to coal signal value with instantaneous delivery value, adjusts induction system
Start the motor speed of motor, make actual coal-supplying amount identical to coal demand holding with boiler combustion system.Warning device can
Various states signal or alarm signal are exported, such as the status signal of feeder, chute blockage, disconnected coal, coal cinder material sideslip and overtemperature
Signal etc..The continual and steady coal supply of Gravimetric Coal Feeders energy is effectively guaranteed by above-mentioned setting.
However, weighing sensor is arranged on the lower section of the weighing carrier roller of enclosure interior by this Gravimetric Coal Feeders, due to claiming
Weight feeder enclosure interior environment it is poor, coal dust often overstock below weighing sensor, cause weighing sensor and
Full coal dust is blocked up between the base of weighing sensor, causes weighing sensor stress untrue, so as to cause metering inaccurate.Together
When, the weighing sensor circuit of enclosure interior is influenceed easy aged deterioration by complex environments such as enclosure interior temperature and humidities,
In addition, the coal cinder material that sideslip is scattered on conveyer belt also easily smashes weighing sensor.
Below in conjunction with accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Generally exist
The component of the embodiment of the present invention described and illustrated in accompanying drawing can be configured to arrange and design with a variety of herein.Cause
This, the detailed description of the embodiments of the invention to providing in the accompanying drawings is not intended to limit claimed invention below
Scope, but it is merely representative of the selected embodiment of the present invention.Based on embodiments of the invention, those skilled in the art are not doing
The every other embodiment obtained on the premise of going out creative work, belongs to the scope of protection of the invention.
The device that the embodiment of the present invention is provided, in addition to the improved part of the embodiment of the present invention, its realization principle and knot
Structure and foregoing device describe identical, and to briefly describe, only the improved part of the present invention is described for the embodiment of the present invention.
Embodiment 1
With reference to figure 1 and Fig. 2：First embodiment of the invention provides a kind of Gravimetric Coal Feeders, and the Gravimetric Coal Feeders include shell
Body 101, weighing carrier roller, the first weighing sensor 201 and the second weighing sensor 202, two relative surfaces of housing 101 are provided with
First through hole and the second through hole, weighing carrier roller include the first pressure unit 203 and the second pressure unit 204, the first pressure unit 203 and
Two pressure units 204 are located at the both ends of weighing carrier roller respectively, and the first pressure unit 203 passes through first through hole, and the second pressure unit 204 passes through
Second through hole；
Gravimetric Coal Feeders also include being arranged at first support 205, the second support 206 outside housing 101, the first pressure unit
203 are placed in the top of the first weighing sensor 201, and the first pressure unit 203 is bolted with the first weighing sensor 201,
Second pressure unit 204 is placed in the top of the second weighing sensor 202, and the second pressure unit 204 passes through with the second weighing sensor 202
Bolt connection；
First support 205 is placed in the lower section of the first weighing and sensing, and first support 205 passes through with the first weighing sensor 201
Bolt connection, second support 206 are placed in the lower section of the second weighing sensor 202, the weighing sensor of second support 206 and second
202 are bolted.
The both ends of weighing carrier roller pass through the first through hole set on housing 101 and the second through hole, and pass through bolt and support
Weighing sensor is fixed on outside housing 101.Using such setting it is effective avoid weighing sensor because of coal dust accumulation and
The situation for causing weighing sensor metering inaccurate occurs.Meanwhile it ensure that weighing sensor will not be by conveyer belt in housing 101
The coal cinder material of upper sideslip smashes.Further, since weighing sensor is arranged on the outside of housing 101, therefore weighing sensor
Connection line is also disposed at the outside of housing 101, ensures that connection line will not be because of high temperature in housing 101 and moist environment shadow
Ring and break down.
In the present embodiment, the first pressure unit 203 is bolted with the first weighing sensor 201, the second pressure unit
204 are bolted with the second weighing sensor 202, and first support 205 is connected with the first weighing sensor 201 by bolt
Connect, second support 206 is bolted with the second weighing sensor 202.It is connected by screw bolts, can effectively ensures connection jail
Gu certainly, as long as can guarantee that can also firmly use other connected modes, such as pin connection is used.
Embodiment 2
With reference to figure 3 and Fig. 4：Second embodiment of the invention is the improvement carried out on the basis of first embodiment.
During the use of Gravimetric Coal Feeders, the equipment in housing 101 can break down often, and Gravimetric Coal Feeders
Housing 101 mostly uses the housing 101 of the closing of metal material, is needed when overhauling the equipment in housing 101 by metal shell 101
Disassemble, and the dismounting of housing 101 is cumbersome, in consideration of it, the phase of the housing 101 for the Gravimetric Coal Feeders that the present embodiment provides
To two surfaces be provided with third through-hole and fourth hole, the first flange plate for being used for sealing third through-hole is provided with third through-hole
207, first through hole is located on first flange plate 207；The second flange plate for being used for sealing fourth hole is provided with fourth hole
208, the second through hole is located on second flange plate 208, and first through hole connects with third through-hole, and the second through hole connects with fourth hole
It is logical.
First flange plate 207 by setting third through-hole and for sealing third through-hole, fourth hole is set and is used for
The second flange plate 208 of fourth hole is sealed, the equipment inside housing 101 can directly take first flange apart when breaking down
Plate 207 or second flange plate 208 overhaul to the equipment inside housing 101, so that the maintenance of the equipment inside housing 101
It is very convenient.The size of third through-hole and fourth hole should try one's best, and guarantee realization is convenient to overhaul, and sets first flange plate 207
Should being tried one's best with second flange plate 208, guarantee is convenient to dismantle.
The diameter of weighing carrier roller based on common Gravimetric Coal Feeders, the present embodiment provide the hole of first through hole and the second through hole
Footpath is 28mm.Certainly, the aperture of the second through hole and the second through hole is not limited only to 28mm, as long as aperture can meet the two of weighing carrier roller
The pressure unit at end may pass through first through hole and the second through hole, with a diameter of of the pressure unit slightly larger than weighing carrier roller both ends
It is good.
Embodiment 3
With reference to figure 5-7：Third embodiment of the invention is the improvement carried out on the basis of second embodiment.
During Gravimetric Coal Feeders are run, it is possible that error when weighing sensor is weighed, in consideration of it, this implementation
The Gravimetric Coal Feeders that example provides are additionally provided with the weight-hoist device for calibrating weighing sensor, and weight-hoist device includes the first link code
213 and second link code 214, the first link code 213 hang in the first pressure unit 203, the second link code 214 hang on the second pressure unit
On 204, it can be realized by weight-hoist device and weighing sensor is calibrated, be further ensured that weighing sensor is weighed accurately.
In order to be effectively protected weighing sensor, weighing sensor is avoided to damage under external force, the present embodiment provides
Gravimetric Coal Feeders be additionally provided with the first protective cover 215 and the second protective cover 216, the first weighing sensor 201, the first link code
213rd, the first pressure unit 203 and first support 205 may be contained within the first protective cover 215, the second weighing sensor 202, second
Link code 214, the second pressure unit 204 and second support 206 may be contained within the second protective cover 216, the first protective cover 215 and housing
101 are fixedly connected, and the second protective cover 216 is fixedly connected with housing 101.
By setting the first protective cover 215 and the second protective cover 216 that Gravimetric Coal Feeders can be played with sealing well and made
With being effectively protected the first weighing sensor 201 and the second weighing sensor 202, ensure that the stable operation of Gravimetric Coal Feeders.
In the present embodiment, the first protective cover 215 includes the first shield body and the first protection cover-cap, the first protective cover
Body and the second protection cover-cap include the second shield body and the second protection cover-cap by hasp connection, the second protective cover 216,
Second shield body and the second protection cover-cap through hole hasp connection.By the way of the connection of tower button, guarantee very easily
Weighing sensor in protective cover is overhauled and verified.
Certainly, connected mode is not limited only to hasp, as long as it can realize that the convenient weighing sensor in protective cover is carried out
The connected mode of maintenance and verification is feasible embodiment, for example, being connected by screw bolts.
In the running of Gravimetric Coal Feeders, due to gap between first through hole and the first pressure unit 203 be present, second
There is also gap between through hole and the second pressure unit 204, therefore, a small amount of coal dust in housing 101 can be overflowed by gap
Into the protective cover outside housing 101, so as to influence the accuracy that Gravimetric Coal Feeders are weighed.Therefore, what the present embodiment provided weighs
Feeder be additionally provided with the first seal pipe 211 being connected with the first protective cover 215 and be connected with the second protective cover 216
Two seal pipes 212.Specifically, one end of the first seal pipe 211 is connected with the first shield body, the second seal pipe 212
One end is connected with the second shield body.The coal dust spilt into protective cover can pass through the first seal pipe 211 and the second sealing
Pipe 212 is discharged, and so as to can effectively improve the protective cover internal environment of Gravimetric Coal Feeders, ensures weighing sensor inside protective cover
Cleaning, effectively extend protective cover in equipment service life.
, can also be by the other end of the first seal pipe 211 and ventilating system to ensure the sealing effectiveness of Gravimetric Coal Feeders
Ventilation duct is connected, and the other end of the second seal pipe 212 is also connected with the ventilation duct of ventilating system, using such setting,
The protective cover internal environment of Gravimetric Coal Feeders can further be improved, make feeder enclosure interior pressure and protective cover internal pressure phase
Balance so as to reach the effect of air seal.Ensure cleaning of the weighing sensor inside protective cover, effectively extend in protective cover
Equipment service life.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention described should be defined by scope of the claims.
Claims (7)
- A kind of 1. Gravimetric Coal Feeders, it is characterised in that：Weighed biography including housing, weighing carrier roller, the first weighing sensor and second Sensor, relative two surface of the housing are respectively equipped with first through hole and the second through hole, and the weighing carrier roller includes first Pressure unit and the second pressure unit, first pressure unit and second pressure unit are located at the both ends of the weighing carrier roller respectively, First pressure unit passes through the first through hole, and second pressure unit passes through second through hole；The Gravimetric Coal Feeders also include being arranged at the first support of the hull outside, second support, the first connector, second Connector, the 3rd connector and the 4th connector, first pressure unit is placed in the top of first weighing sensor, described First pressure unit is connected with first weighing sensor by first connector, and second pressure unit is placed in described The top of two weighing sensors, second pressure unit are connected with second weighing sensor by second connector；The first support is placed in the lower section of first weighing and sensing, and the first support is led to first weighing sensor Cross the 3rd connector connection, the second support is placed in the lower section of second weighing sensor, the second support with Second weighing sensor is connected by the 4th connector；Two relative surfaces of the housing further respectively have third through-hole and fourth hole, are set at the third through-hole There is the first flange plate for sealing the third through-hole, the first through hole is located on the first flange plate, and described One through hole connects with the third through-hole；The second flange plate for being used for sealing the fourth hole is provided with the fourth hole, Second through hole is located on the second flange plate, and second through hole connects with the fourth hole.
- 2. Gravimetric Coal Feeders according to claim 1, it is characterised in that the Gravimetric Coal Feeders also include weight-hoist device, institute Stating weight-hoist device includes the first link code and the second link code, and first link code hang on first pressure unit, and described second hangs Code hang on second pressure unit.
- 3. Gravimetric Coal Feeders according to claim 2, it is characterised in that the Gravimetric Coal Feeders also include the first protective cover and Second protective cover, first weighing sensor, first link code, first pressure unit and the first support are respectively provided with In in first protective cover, second weighing sensor, second link code, second pressure unit and described second Frame be may be contained within second protective cover, and first protective cover is fixedly connected with the housing, second protective cover with The housing is fixedly connected.
- 4. Gravimetric Coal Feeders according to claim 3, it is characterised in that the Gravimetric Coal Feeders also include the first seal pipe and Second seal pipe, one end of first seal pipe are connected with first protective cover, one end of second seal pipe with Second protective cover is connected.
- 5. Gravimetric Coal Feeders according to claim 3, it is characterised in that first protective cover includes the first shield body With the first protection cover-cap, first shield body passes through hasp connection, second protection with first protection cover-cap Cover includes the second shield body and the second protection cover-cap, and second shield body is with second protection cover-cap by taking Button connection.
- 6. Gravimetric Coal Feeders according to claim 1, it is characterised in that the aperture of the first through hole and second through hole It is 28mm.
- 7. according to any Gravimetric Coal Feeders of claim 1-6, it is characterised in that first connector, described second connect Fitting, the 3rd connector and the 4th connector are bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510154498.1A CN104773481B (en) | 2015-04-02 | 2015-04-02 | Gravimetric Coal Feeders |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510154498.1A CN104773481B (en) | 2015-04-02 | 2015-04-02 | Gravimetric Coal Feeders |
Publications (2)
| Publication Number | Publication Date |
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| CN104773481A CN104773481A (en) | 2015-07-15 |
| CN104773481B true CN104773481B (en) | 2017-11-17 |
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| CN201510154498.1A Active CN104773481B (en) | 2015-04-02 | 2015-04-02 | Gravimetric Coal Feeders |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101332944A (en) * | 2008-07-23 | 2008-12-31 | 李文昌 | Main shaft skip weight-measuring device for coal supply machine |
| CN101614578B (en) * | 2009-07-29 | 2010-12-08 | 江苏赛摩集团有限公司 | Multi-accumulation electronic belt scale |
| CN201497567U (en) * | 2009-09-04 | 2010-06-02 | 常州机电职业技术学院 | Real coal verifying unit on bridge coal unloading machine |
| CN202988209U (en) * | 2012-08-03 | 2013-06-12 | 新乡市振源机械设备有限责任公司 | Dynamic weighing type quantifying A belt feeder |
| CN202988306U (en) * | 2012-11-27 | 2013-06-12 | 江苏振东港口机械制造有限公司 | Automated coal blending system |
| CN103935690A (en) * | 2014-04-29 | 2014-07-23 | 鹤壁市煤化机械有限责任公司 | Metering belt type feeder free of carrier rollers |
| CN204606972U (en) * | 2015-04-02 | 2015-09-02 | 贵州清成机电设备有限公司 | Gravimetric Coal Feeders |
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2015
- 2015-04-02 CN CN201510154498.1A patent/CN104773481B/en active Active
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