CN205587061U - Coal pulverizer hydraulic pressure becomes loading device - Google Patents
Coal pulverizer hydraulic pressure becomes loading device Download PDFInfo
- Publication number
- CN205587061U CN205587061U CN201620292827.9U CN201620292827U CN205587061U CN 205587061 U CN205587061 U CN 205587061U CN 201620292827 U CN201620292827 U CN 201620292827U CN 205587061 U CN205587061 U CN 205587061U
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- pressure
- coal pulverizer
- current signal
- load
- feed rate
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Abstract
The utility model discloses a coal pulverizer hydraulic pressure becomes loading device, including hydraulic pressure loading unit, high -pressure pump, proportion overflow valve, liquid stream pipeline, feed rate caliber and DCS controller, hydraulic pressure loading unit and coal pulverizer outer wall fixed connection to run through the through -hole on the coal pulverizer outer wall, the coal pulverizer grinding roller is supported on the top, provides apply pressure for the grinding roller, the high -pressure pump provides hydraulic power, the proportion overflow valve is received the command signal of DCS controller and is adjusted apply pressure, liquid stream tube coupling hydraulic pressure loading unit, high -pressure pump and proportion overflow valve constitute liquid stream circulation circuit jointly, the feed rate caliber converts into the coal pulverizer feed rate who records required apply pressure value and exports first current signal to DCS controller, the DCS controller is connected with feed rate caliber and proportion overflow valve, receives the first current signal of feed rate caliber output to it exports the proportion overflow valve to to convert command signal into. Through this device, the coal pulverizer can be according to the automatic loading that becomes of the feed rate condition.
Description
Technical field
This utility model relates to coal pulverizer field, and particularly a kind of coal pulverizer hydraulic pressure becomes to add and carries
Put.
Background technology
Coal pulverizer is by coal crusher ground machine.Coal is milled in coal pulverizer
The process of powder, mainly by spring charging device, preload force being applied to Burnisher apparatus makes coal
Block grinds to form coal dust.The industries such as current thermal power plant, metallurgy, chemical industry and cement are used
HP coal pulverizer is all adopted and is spring-loaded, although have simple in construction and little excellent of maintenance workload
Point, but have the disadvantage that
1, glide for raw coal quality, source is wide and coal type change is frequent, and user requires mill
Coal machine increases on-load pressure, but existing coal pulverizer spring charging device cannot be real
The raising of existing coal pulverizer on-load pressure.
2, peak load regulation task weight, coal pulverizer load variations is big, and spring loads and cannot realize
Become and load, it is impossible to meet requirement；
3, spring loads to belong to and determines loading mode, in the middle of coal pulverizer runs, because of loading force
Do not mate with load and the dangerous phenomenons such as vibration and load bar are pulled off can occur.
Based on above not enough, coal pulverizer runs and adds with the change of load variations in the urgent need to on-load pressure
Carry and put, the running environment big to adapt to load variations.
Utility model content
The purpose of this utility model is to solve the problems of the prior art, it is provided that a kind of realization adds
Carry the pressure load-variable device with load variations.
For reaching above-mentioned purpose, this utility model adopts the following technical scheme that
A kind of coal pulverizer hydraulic pressure load-variable device, is characterized in that: include hydraulic loaded unit, height
Press pump, proportional pressure control valve, liquid stream pipeline, feed rate measuring device and DCS controller；Institute
The hydraulic loaded unit stated is fixing with coal pulverizer outer wall to be connected, and runs through leading on coal pulverizer outer wall
Hole, contact Roller of Coal Grinder, provide on-load pressure for grinding roller；Described high-pressure pump provides hydraulic pressure
Power；Described proportional pressure control valve receives the command signal of DCS controller and adjusts loading pressure
Power；Described liquid stream pipeline connects hydraulic loaded unit, high-pressure pump and proportional pressure control valve, jointly
Constitute liquid stream closed circuit；The coal pulverizer feed rate that described feed rate measuring device will record
It is converted into required on-load pressure value and exports the first current signal to DCS controller；Described
DCS controller is connected with feed rate measuring device and proportional pressure control valve, receives feed rate and measures
First current signal of device output, and be converted to command signal output to proportional pressure control valve.
Further, described hydraulic loaded unit includes hydraulic cylinder and bindiny mechanism；Described
Hydraulic cylinder includes cylinder barrel, cylinder barrel adpting flange, piston rod；Cylinder barrel adpting flange is positioned at outside cylinder barrel
Surface is the most affixed with cylinder barrel；Piston rod is hydraulic cylinder outfan；Described bindiny mechanism is by hydraulic pressure
Cylinder is fixedly connected on coal pulverizer outer wall.
Further, described bindiny mechanism include cylinder, the first flange, the first screw rod,
Two flanges, the second screw rod, loading screw rod；Described cylinder and the first flange, the second flange are admittedly
Fixed connection；Described cylinder and cylinder barrel are by the first flange, cylinder barrel adpting flange and the first screw rod
It is axially and fixedly connected to together；Described cylinder and coal pulverizer outer wall by the second flange, second
Screw rod is fixed together；Cylinder also runs through the through hole on coal pulverizer outer wall；Described loading
Screw rod is axially fixed together by screw thread with piston rod；Piston rod is by loading screw top
To grinding roller, and apply on-load pressure.
Further, described bindiny mechanism also includes sinking support circle, and sinking support circle is installed
In cylinder, it is used for supporting loading screw rod.
Further, the required on-load pressure value scope that feed rate measuring device is converted into is 5Mpa
To 14Mpa；First current signal scope of feed rate measuring device output is 4mA to 20mA；
Wherein, corresponding for 4mA required on-load pressure value is the required loading pressure that 5Mpa, 20mA are corresponding
Force value is 14Mpa；In this range, the first current signal becomes equal proportion with required on-load pressure
Relation.
Further, the command signal of DCS controller output is voltage signal, its value and first
Current signal is proportional.
Further, the command signal of DCS controller output is current signal, its value and first
Current signal is equal or proportional.
Further, this device also includes pressure transmitter；Described pressure transmitter and liquid stream
Pipeline and DCS controller connect；Actual loaded pressure transition is the second electricity by pressure transmitter
Stream signal also exports to DCS.
Further, this device also includes pressure transmitter；Described pressure transmitter and liquid stream
Pipeline and DCS controller connect；Actual loaded pressure transition is the second electricity by pressure transmitter
Stream signal also exports to DCS；Actual loaded pressure oscillation scope is 5Mpa to 14Mpa, the
Two current signal scopes are 4mA to 20mA；Wherein, corresponding for 4mA actual loaded force value is
The actual loaded force value that 5Mpa, 20mA are corresponding is 14Mpa；In this range, the second electricity
Stream signal becomes equal proportion relation with actual loaded pressure.
Further, DCS controller is additionally operable to compare the first current signal value and the second electric current letter
Number value, if the absolute value of phase difference is less than or equal to the threshold values that is manually set, the then instruction exported
Signal is constant；Absolute value such as phase difference is believed more than the threshold values being manually set, the then instruction exported
Number it is directly proportional to the first current signal.
Technical scheme described in the utility model is relative to prior art, the beneficial effect of acquirement
It is:
(1) by feed rate measuring device, feed rate to be converted to the first electric current defeated for this device
Go out to DCS controller, and controlled proportional pressure control valve adjustment by DCS controller
Hydraulic loading pressure, loads it is achieved thereby that hydraulic pressure becomes.
(2) hydraulic cylinder is fixedly connected on coal pulverizer outer wall by bindiny mechanism by this device, knot
Structure is simple.
(3) this device is connected with cylinder barrel by cylinder, and is run through on coal pulverizer outer wall by cylinder
Through hole, thus can utilize that former spring charging device stays easily former logical
Hole, and process cylinder external diameter and match with former through hole internal diameter, such that it is able to minimum
Transformation cost spring is loaded surely be converted to hydraulic pressure become load, reduce into
This, decrease human input, improve the utilization rate of original equipment.
(4) by arranging sinking support circle, thus support loading screw rod, make the vibration of grinding roller
Power is released by loading screw rod and sinking support circle, thus allows hydraulic cylinder live
The more difficult fracture of stopper rod.
(5) feed rate measuring device by feed rate load according to be manually set be converted into required
On-load pressure, and export 4mA to 20mA current signal, it is simple to DCS is carried out
Relevant treatment.
(6) arranging pressure transmitter by actual loaded pressure transition is that current signal exports extremely
DCS, it is simple to DCS shows and monitors actual loaded pressure.
(7) actual loaded pressure is also transitioned into 4mA to 20mA electric current letter by pressure transmitter
Number, it is simple to DCS carries out relevant treatment.
(8) DCS is by comparing the first current signal value and the second current signal value, thus keeps away
Exempt from frequent change to load, add the stability of coal pulverizer work.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing being further appreciated by of the present utility model, constitutes this
A part for utility model, schematic description and description of the present utility model is used for explaining this
Utility model, is not intended that improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is this utility model embodiment device logical schematic；
Fig. 2 is this utility model embodiment hydraulic loaded cellular construction schematic diagram.
Detailed description of the invention
In order to make technical problem to be solved in the utility model, technical scheme and beneficial effect more
Add clear, clear, below in conjunction with drawings and Examples, this utility model is carried out the most in detail
Describe in detail bright.Should be appreciated that specific embodiment described herein only in order to explain this utility model,
It is not used to limit this utility model.
As shown in Figure 1 and Figure 2, in the present embodiment, coal pulverizer hydraulic pressure load-variable device includes
Hydraulic loaded unit, high-pressure pump, proportional pressure control valve, liquid stream pipeline, feed rate measuring device,
Pressure transmitter and DCS controller.
Described hydraulic loaded unit is fixing with coal pulverizer outer wall 20 to be connected, and runs through coal pulverizer
Through hole on outer wall, contact Roller of Coal Grinder 30, provide on-load pressure for grinding roller 30.Coal-grinding
Machine grinding roller 30 tension member 40 tractive simultaneously, and rotate around gudgeon.Specifically, described liquid
Pressure loading unit includes hydraulic cylinder and bindiny mechanism；Described hydraulic cylinder includes cylinder barrel 1, cylinder barrel
Adpting flange 2, piston rod 3；Cylinder barrel adpting flange 2 is positioned at cylinder barrel 1 outer surface and cylinder barrel
1 is affixed；Piston rod 3 is hydraulic cylinder outfan.Described bindiny mechanism connects fixing for hydraulic cylinder
Be connected to coal pulverizer outer wall 20, specifically include cylinder the 4, first flange the 5, first screw rod 6,
Two flange the 7, second screw rods 8, loading screw rod 9 and sinking support circle 10.Described cylinder 4
Fix with first flange the 5, second flange 7 and be connected；Described cylinder 4 and cylinder barrel 1 are by the
Together with one flange 5, cylinder barrel adpting flange 2 are axially and fixedly connected to the first screw rod 6；Described
Cylinder 4 and coal pulverizer outer wall 20 be fixedly connected on by second flange the 7, second screw rod 8
Together；Cylinder also runs through the through hole on coal pulverizer outer wall 20；This through hole can be this coal pulverizer
Stayed when transforming front spring charger and stretching into coal pulverizer outer wall；Described loading screw rod 9 with
Piston rod 3 is axially fixed together by screw thread；Piston rod 3 pushes up by loading screw rod 9
To grinding roller 30, and apply on-load pressure；Described sinking support circle 10 is installed in cylinder 4,
For supporting loading screw rod 10.
Described high-pressure pump provides hydraulic power.
Described proportional pressure control valve receives the command signal of DCS controller and adjusts loading pressure
Power.
Described liquid stream pipeline connects hydraulic loaded unit, high-pressure pump and proportional pressure control valve, jointly
Constitute liquid stream closed circuit.
Described feed rate measuring device adds needed for being converted into by the coal pulverizer feed rate recorded
Carry force value and export the first current signal to DCS controller.Specifically, the present embodiment
In, feed rate measuring device measures coal pulverizer feed stream by speed measuring device and LOAD CELLS
Amount, and this flow rate conversion is become required on-load pressure, required on-load pressure value scope be 5Mpa extremely
14Mpa；First current signal scope of feed rate measuring device output is 4mA to 20mA；Its
In, required on-load pressure value corresponding for 4mA is the required on-load pressure that 5Mpa, 20mA are corresponding
Value is 14Mpa；In this range, the first current signal becomes equal proportion to close with required on-load pressure
System.
Described pressure transmitter is connected with liquid stream pipeline and DCS controller；Pressure transmitter
It is the second current signal by actual loaded pressure transition and exports to DCS；Actual loaded pressure becomes
Dynamic scope is 5Mpa to 14Mpa, and the second current signal scope is 4mA to 20mA；Wherein,
Actual loaded force value corresponding for 4mA is that the actual loaded force value that 5Mpa, 20mA are corresponding is
14Mpa；In this range, the second current signal becomes equal proportion relation with actual loaded pressure.
DCS receives the second current signal, can inversely be changed into force value and show.
In the present embodiment, described DCS controller and feed rate measuring device, pressure inverting
Device and proportional pressure control valve connect, and receive the first current signal and the pressure of the output of feed rate measuring device
Second current signal of power transmitter output, and compare the first current signal value and the second electric current letter
Number value, if the absolute value of phase difference is less than or equal to the threshold values that is manually set, the then instruction exported
Signal is constant；Absolute value such as phase difference is believed more than the threshold values being manually set, the then instruction exported
Number for current signal be worth equal with current signal one.
In other embodiments, pressure transmitter can be not provided with, now, DCS controller with
Feed rate measuring device and proportional pressure control valve connect, and receive the first of the output of feed rate measuring device
Current signal, and be converted to command signal output to proportional pressure control valve.Described command signal can
Be voltage signal can also be current signal.When for voltage signal, current signal can be passed through
The method migration of converting voltage signal is voltage signal.This change-over circuit is prior art, such as may be used
To use audion, Hall element, integrating circuit, bleeder circuit etc. to realize.When for
During current signal, its numerical value and the first current signal can be equal, the most also can direct ratio.
Feed rate is converted to the first electric current by feed rate measuring device and exports by the present embodiment
To DCS controller, and controlled proportional pressure control valve adjustment hydraulic loaded pressure by DCS controller
Power, loads it is achieved thereby that hydraulic pressure becomes.
The present embodiment is connected with cylinder barrel 1 by cylinder 4, and is run through coal pulverizer outer wall by cylinder 4
Through hole on 20, thus the former through hole that former spring charging device stays can be utilized easily, and
Processing cylinder 4 external diameter matches with former through hole internal diameter, such that it is able to the transformation cost of minimum is by bullet
Spring surely loads and is converted to hydraulic pressure change loading, reduces cost, decreases human input, improves
The utilization rate of original equipment.
The present embodiment arranges sinking support circle 10, thus supports loading screw rod 9, makes shaking of grinding roller
Power is released by loading screw rod 9 and sinking support circle 10, thus allows hydraulic cylinder piston
The more difficult fracture of bar.
In the present embodiment, feed rate measuring device by feed rate load according to being manually set conversion
Become required on-load pressure, and export 4mA to 20mA current signal, it is simple to DCS is correlated with
Process.
In the present embodiment, arranging pressure transmitter by actual loaded pressure transition is that current signal is defeated
Go out to DCS, it is simple to DCS shows and monitors actual loaded pressure.Pressure transmitter is by reality
On-load pressure also transitions into 4mA to 20mA current signal, it is simple to DCS carries out relevant treatment.
In the present embodiment, DCS by comparing the first current signal value and the second current signal value,
Thus avoid and frequently become loading, add the stability of coal pulverizer work.
Description above describe preferred embodiment of the present utility model, it is to be understood that this practicality is new
Type is not limited to above-described embodiment, and should not regard the eliminating to other embodiments as.By this
The enlightenment of invention, those skilled in the art combine known or prior art, knowledge is carried out changes
Move and also should be regarded as in protection domain of the present utility model.
Claims (10)
1. a coal pulverizer hydraulic pressure load-variable device, is characterized in that: include hydraulic loaded unit, high-pressure pump, proportional pressure control valve, liquid stream pipeline, feed rate measuring device and DCS controller；
Described hydraulic loaded unit is fixing with coal pulverizer outer wall to be connected, and runs through the through hole on coal pulverizer outer wall, and contact Roller of Coal Grinder provides on-load pressure for grinding roller；
Described high-pressure pump provides hydraulic power；
Described proportional pressure control valve receives the command signal of DCS controller and adjusts on-load pressure；
Described liquid stream pipeline connects hydraulic loaded unit, high-pressure pump and proportional pressure control valve, collectively forms liquid stream closed circuit；
The coal pulverizer feed rate recorded is converted into required on-load pressure value and exports the first current signal to DCS controller by described feed rate measuring device；
Described DCS controller is connected with feed rate measuring device and proportional pressure control valve, receives the first current signal of feed rate measuring device output, and is converted to command signal output to proportional pressure control valve.
2. a kind of coal pulverizer hydraulic pressure load-variable device as claimed in claim 1, is characterized in that: described hydraulic loaded unit includes hydraulic cylinder and bindiny mechanism；
Described hydraulic cylinder includes cylinder barrel, cylinder barrel adpting flange, piston rod；Cylinder barrel adpting flange is positioned at cylinder barrel outer surface affixed with cylinder barrel；Piston rod is hydraulic cylinder outfan；
Hydraulic cylinder is fixedly connected on coal pulverizer outer wall by described bindiny mechanism.
3. a kind of coal pulverizer hydraulic pressure load-variable device as claimed in claim 2, is characterized in that: described bindiny mechanism includes cylinder, the first flange, the first screw rod, the second flange, the second screw rod, loads screw rod；
Described cylinder and the first flange, the fixing connection of the second flange；
Described cylinder is axially fixed together by the first flange, cylinder barrel adpting flange and the first screw rod with cylinder barrel；
Described cylinder is fixed together by the second flange, the second screw rod with coal pulverizer outer wall；Cylinder also runs through the through hole on coal pulverizer outer wall；
Described loading screw rod is axially fixed together by screw thread with piston rod；Piston rod supports grinding roller by loading screw top, and applies on-load pressure.
4. a kind of coal pulverizer hydraulic pressure load-variable device as claimed in claim 3, is characterized in that: described bindiny mechanism also includes that sinking support circle, sinking support circle are installed in cylinder, is used for supporting loading screw rod.
5. a kind of coal pulverizer hydraulic pressure load-variable device as according to any one of Claims 1-4, is characterized in that: the required on-load pressure value scope that feed rate measuring device is converted into is 5Mpa to 14Mpa；First current signal scope of feed rate measuring device output is 4mA to 20mA；Wherein, corresponding for 4mA required on-load pressure value be the required on-load pressure value that 5Mpa, 20mA are corresponding be 14Mpa；In this range, the first current signal becomes equal proportion relation with required on-load pressure.
6. a kind of coal pulverizer hydraulic pressure load-variable device as according to any one of Claims 1-4, is characterized in that: the command signal of DCS controller output is voltage signal, and its value is proportional with the first current signal.
7. a kind of coal pulverizer hydraulic pressure load-variable device as according to any one of Claims 1-4, is characterized in that: the command signal of DCS controller output is current signal, and its value is equal with the first current signal or proportional.
8. a kind of coal pulverizer hydraulic pressure load-variable device as according to any one of Claims 1-4, is characterized in that: this device also includes pressure transmitter；Described pressure transmitter is connected with liquid stream pipeline and DCS controller；Actual loaded pressure transition is the second current signal and exports to DCS by pressure transmitter.
9. a kind of coal pulverizer hydraulic pressure load-variable device as claimed in claim 5, is characterized in that: this device also includes pressure transmitter；Described pressure transmitter is connected with liquid stream pipeline and DCS controller；Actual loaded pressure transition is the second current signal and exports to DCS by pressure transmitter；Actual loaded pressure oscillation scope is 5Mpa to 14Mpa, and the second current signal scope is 4mA to 20mA；Wherein, corresponding for 4mA actual loaded force value be the actual loaded force value that 5Mpa, 20mA are corresponding be 14Mpa；In this range, the second current signal becomes equal proportion relation with actual loaded pressure.
10. a kind of coal pulverizer hydraulic pressure load-variable device as claimed in claim 9, it is characterized in that: DCS controller is additionally operable to compare the first current signal value and the second current signal value, if the absolute value of phase difference is less than or equal to the threshold value being manually set, then the command signal exported is constant；If the absolute value of phase difference is more than the threshold value being manually set, then the command signal exported and the first current signal are directly proportional.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620292827.9U CN205587061U (en) | 2016-04-09 | 2016-04-09 | Coal pulverizer hydraulic pressure becomes loading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620292827.9U CN205587061U (en) | 2016-04-09 | 2016-04-09 | Coal pulverizer hydraulic pressure becomes loading device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205587061U true CN205587061U (en) | 2016-09-21 |
Family
ID=56923321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620292827.9U Withdrawn - After Issue CN205587061U (en) | 2016-04-09 | 2016-04-09 | Coal pulverizer hydraulic pressure becomes loading device |
Country Status (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105689056A (en) * | 2016-04-09 | 2016-06-22 | 厦门金邦达实业有限责任公司 | Hydraulic variable-loading device for coal mill |
-
2016
- 2016-04-09 CN CN201620292827.9U patent/CN205587061U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105689056A (en) * | 2016-04-09 | 2016-06-22 | 厦门金邦达实业有限责任公司 | Hydraulic variable-loading device for coal mill |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160921 Effective date of abandoning: 20180109 |
|
| AV01 | Patent right actively abandoned |