CN203044141U - Control device for preventing sudden dropping of grinder roll of coal mill - Google Patents
Control device for preventing sudden dropping of grinder roll of coal mill Download PDFInfo
- Publication number
- CN203044141U CN203044141U CN 201320035795 CN201320035795U CN203044141U CN 203044141 U CN203044141 U CN 203044141U CN 201320035795 CN201320035795 CN 201320035795 CN 201320035795 U CN201320035795 U CN 201320035795U CN 203044141 U CN203044141 U CN 203044141U
- Authority
- CN
- China
- Prior art keywords
- coal mill
- grinding roller
- grinder roll
- coal pulverizer
- control device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Abstract
The utility model discloses a control device for preventing sudden dropping of a coal mill grinder roll. The control device comprises an auxiliary oil pump, a hydraulic reversing valve and a coal mill grinder roll, wherein the oil outlet of the auxiliary oil pump is connected with the oil inlet of the hydraulic reversing valve, the oil outlet of the hydraulic reversing valve is connected with a hydraulic cylinder of the coal mill grinder roll, a position detection switch is installed on the position to which the coal mill grinder roll is descended, the output signal of the position detection switch is connected with a control coil of an intermediate relay, and a normally-open contact (2) of the intermediate relay is connected with an action control signal (1) of the hydraulic reversing valve in serial; and the problems that the hydraulic reversing valve is suddenly opened in the ascending process of the coal mill grinder roll or when the coal mill grinder roll ascends to a highest position, the pressure of the grinder roll is suddenly released, the grinder roll drops towards a grinding disc from the highest position to damage the equipment, the abnormal operation of the equipment is resulted, and the production is influenced can be solved.
Description
Technical field
The utility model relates to the coal pulverizer control technology, relates in particular to a kind of control device that prevents that the coal pulverizer grinding roller from falling suddenly.
Background technology
Coal pulverizer (A-1101A/B) is the equipment that the Beijing Electrical Equipment Factory produces, adopt motor-driven, the lifting of this coal pulverizer grinding roller is to lean on coal pulverizer subsidiary engine oil pump to suppress institute to provide, oil pump provides energy by the subsidiary engine motor-driven, when hydraulicdirectional control valve is closed, pressure is built pressure under the driving of motor, when hydraulicdirectional control valve is opened, pressure descends rapidly, therefore the switch of hydraulicdirectional control valve is directly connected to the size that promotes coal pulverizer grinding roller lifting pressure, if if when valve at the grinding roller lifting process or when being raised to the extreme higher position valve throw open, the pressure that promotes grinding roller discharges suddenly, directly causes grinding roller moment to be pounded to mill from eminence, causes the device damage accident, cause equipment to run well, have a strong impact on production.
Summary of the invention
The technical problems to be solved in the utility model: a kind of control device that prevents that the coal pulverizer grinding roller from falling suddenly is provided, hydraulic valve throws open when solving coal pulverizer grinding roller lifting process or being raised to the extreme higher position, cause the pressure of grinding roller to discharge suddenly, grinding roller moment pounds to mill from eminence, causes device damage, makes the equipment problems such as influence production that can't run well.
Technical solutions of the utility model:
A kind of control device that prevents that the coal pulverizer grinding roller from falling suddenly, it comprises subsidiary engine oil pump, hydraulicdirectional control valve and coal pulverizer grinding roller, subsidiary engine oil pump oil-out is connected with the hydraulicdirectional control valve oil-in, the hydraulicdirectional control valve oil-out is connected with the hydraulic cylinder of coal pulverizer grinding roller, in the decline of the coal pulverizer grinding roller position that puts in place position detecting switch is installed, the output signal of position detecting switch is connected with the control coil of auxiliary reclay, and the normally opened contact of auxiliary reclay is connected with hydraulicdirectional control valve action control signal.
Position detecting switch is travel switch or photoelectric detection switch.
The beneficial effects of the utility model:
The utility model is at the decline of coal pulverizer grinding roller installation site, the position sense switch that puts in place, the output signal of position detecting switch removes to drive the control coil of auxiliary reclay, normally opened contact is connected on the hydraulicdirectional control valve action control signal, have only when the coal pulverizer grinding roller is in and descend when putting the position in place, position detecting switch has signal, the auxiliary reclay normally opened contact could be closed, the hydraulicdirectional control valve action control signal that electric control system is sent could be connected, coal pulverizer grinding roller pressure is discharged, hydraulic valve throws open when having solved coal pulverizer grinding roller lifting process or being raised to the extreme higher position, cause the pressure of grinding roller to discharge suddenly, grinding roller moment pounds to mill from eminence, causes device damage, make the equipment problem such as influence production etc. that can't run well.
Description of drawings:
Fig. 1 is the utility model control principle schematic diagram.
The specific embodiment:
A kind of control device that prevents that the coal pulverizer grinding roller from falling suddenly, it comprises the subsidiary engine motor, the subsidiary engine oil pump, hydraulicdirectional control valve and coal pulverizer grinding roller, the subsidiary engine motor provides power source for the subsidiary engine oil pump, subsidiary engine oil pump oil-out is connected with the hydraulicdirectional control valve oil-in, the hydraulicdirectional control valve oil-out is connected with the hydraulic cylinder of coal pulverizer grinding roller, in the decline of the coal pulverizer grinding roller position that puts in place position detecting switch is installed, the output signal of position detecting switch is connected with the control coil of auxiliary reclay, and the hydraulicdirectional control valve action control signal 1 that normally opened contact 2 and the electric control system of auxiliary reclay sent is connected.In order to prevent that auxiliary reclay or position detecting switch from damaging, in order to improve reliability, auxiliary reclay can adopt 1-3, position detecting switch can adopt 1-3, its control coil is connected with the output signal of position detecting switch respectively, is connected in series to after the normally opened contact parallel connection of auxiliary reclay on the hydraulicdirectional control valve action control signal 1 that electric control system sends again.
Position detecting switch is travel switch or photoelectric detection switch.
Claims (2)
1. one kind prevents the coal pulverizer grinding roller control device of whereabouts suddenly, it comprises subsidiary engine oil pump, hydraulicdirectional control valve and coal pulverizer grinding roller, subsidiary engine oil pump oil-out is connected with the hydraulicdirectional control valve oil-in, the hydraulicdirectional control valve oil-out is connected with the hydraulic cylinder of coal pulverizer grinding roller, it is characterized in that: in the decline of the coal pulverizer grinding roller position that puts in place position detecting switch is installed, the output signal of position detecting switch is connected with the control coil of auxiliary reclay, and the normally opened contact of auxiliary reclay (2) is connected with hydraulicdirectional control valve action control signal (1).
2. a kind of control device that prevents that the coal pulverizer grinding roller from falling suddenly according to claim 1, it is characterized in that: position detecting switch is travel switch or photoelectric detection switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320035795 CN203044141U (en) | 2013-01-24 | 2013-01-24 | Control device for preventing sudden dropping of grinder roll of coal mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320035795 CN203044141U (en) | 2013-01-24 | 2013-01-24 | Control device for preventing sudden dropping of grinder roll of coal mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203044141U true CN203044141U (en) | 2013-07-10 |
Family
ID=48727141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320035795 Expired - Lifetime CN203044141U (en) | 2013-01-24 | 2013-01-24 | Control device for preventing sudden dropping of grinder roll of coal mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203044141U (en) |
-
2013
- 2013-01-24 CN CN 201320035795 patent/CN203044141U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130710 |