CN212899190U - Coal pulverizer hydraulic loading system and coal pulverizer - Google Patents
Coal pulverizer hydraulic loading system and coal pulverizer Download PDFInfo
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- CN212899190U CN212899190U CN202021984704.4U CN202021984704U CN212899190U CN 212899190 U CN212899190 U CN 212899190U CN 202021984704 U CN202021984704 U CN 202021984704U CN 212899190 U CN212899190 U CN 212899190U
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Abstract
The utility model provides a coal pulverizer hydraulic pressure loading system and coal pulverizer relates to coal pulverizer technical field. The hydraulic loading system of the coal mill comprises a hydraulic oil assembly and a loading loop. The hydraulic oil component comprises a motor, an oil tank and an oil pump, and the motor drives the oil pump to provide hydraulic oil for the system. A filter element is arranged between the loading loop and the hydraulic oil assembly and is used for filtering impurities in the oil tank. This coal pulverizer hydraulic loading system is through setting up filtering piece to impurity in the rose oil case prevents that impurity from entering into the normal operating that influences the loading return circuit in the loading return circuit, has increased hydraulic system's maintenance cycle, has alleviateed the manpower cost of overhaul, has increased the available man-hour of equipment, effectively reduces equipment fault rate, avoids causing the coal pulverizer to shut down because of pressure goes wrong, this structural design is reasonable, and the practicality is strong.
Description
Technical Field
The utility model relates to a coal pulverizer technical field particularly, relates to a coal pulverizer hydraulic pressure loading system and coal pulverizer.
Background
Coal mills are machines for breaking up and grinding coal briquettes into coal dust, which are important auxiliary equipment for coal dust furnaces. The loading system of the coal mill mainly provides grinding pressure which changes along with load (coal amount of the coal feeder) for the grinding roller, and the size of the loading system is realized by controlling the pressure of a hydraulic oil system through a proportional overflow valve according to a command signal of the change of the load (coal amount of the coal feeder).
The existing coal mill loading system adopts an oil return filtering mode, impurities in an oil tank easily enter a pressure control valve of a loading loop, the pressure control valve easily breaks down, normal operation of equipment is affected, and huge economic loss is brought.
The inventor finds in research that at least the following disadvantages exist in the prior related art:
impurities easily enter the pressure control valve, so that the pressure control valve is broken down, and the normal operation of equipment is influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a coal pulverizer hydraulic pressure loading system solves the not enough of prior art, and it is through setting up the impurity that filters in the filter tank, prevents that impurity from entering into the normal operating that influences the loading return circuit in the loading return circuit, has increased hydraulic system's maintenance cycle, has alleviateed the manpower cost of overhaul, has increased the available man-hour of equipment, and this structural design is reasonable, and the practicality is strong.
Another object of the utility model is to provide a coal pulverizer, it adopts this coal pulverizer hydraulic pressure loading system, and it has the fault rate low, long service life's characteristics.
The embodiment of the utility model is realized like this:
the embodiment of the application provides a coal pulverizer hydraulic pressure loading system, including hydraulic oil subassembly and loading return circuit. The hydraulic oil assembly comprises a motor, an oil tank and an oil pump, and the motor drives the oil pump to provide hydraulic oil for the system. And a filter element is arranged between the loading loop and the hydraulic oil assembly and is used for filtering impurities in the oil tank.
This coal pulverizer hydraulic loading system is through setting up filtering piece to impurity in the rose oil tank prevents that impurity from entering into the normal operating that influences the loading return circuit in the loading return circuit, has increased hydraulic system's maintenance cycle, has alleviateed the manpower and has overhauld the cost, has increased the available man-hour of equipment, and this structural design is reasonable, and the practicality is strong.
In some embodiments of the present invention, the loading loop includes a pressure control valve, an actuator cylinder and an energy accumulator, the pressure control valve and the actuator cylinder are connected by a pipeline, the energy accumulator is installed on the loading loop, and is configured to absorb pressure pulsation generated by the loading loop.
The energy accumulator is filled with nitrogen, and after the energy accumulator is installed in the loading loop, the energy accumulator can store rich oil in the loading loop and also can supplement oil to the loading loop so as to achieve oil balance during normal operation. Meanwhile, the hydraulic shock absorber can absorb pressure pulsation, so that hydraulic shock can be effectively absorbed, shock is reduced, and system stability is improved.
In some embodiments of the present invention, the pressure control valve is a proportional overflow valve, and the filter is installed between the proportional overflow valve and the oil tank.
The pressure control valve includes a pressure reducing valve, an overflow valve, and a sequence valve. The proportional overflow valve is used as a pressure control valve to set oil pressure, and when the hydraulic oil pressure is high, the proportional overflow valve is discharged back to the oil tank to ensure that the hydraulic oil is at the set pressure, so that corresponding loading force is obtained.
In some embodiments of the present invention, the loading circuit further includes an electrical control device, and the electrical control device is electrically connected to the pressure control valve.
In some embodiments of the present invention, the filter member is a high-pressure double-tube filter.
The high-pressure double-cylinder filter consists of a reversing valve, a pressure balance valve, a bypass valve, a pollution blockage signal transmitter, two filter cylinders and the like, can realize the replacement of filter elements under the condition that the system does not shut down, can effectively control pollution, prolongs the service life of elements, and does not influence the normal operation of equipment due to the replacement of the filter elements.
In some embodiments of the present invention, a differential pressure alarm switch is disposed on the high-pressure double-cylinder filter.
The differential pressure alarm switch can give an alarm in time to inform, so that the failure rate of equipment is effectively reduced, the shutdown of the coal mill caused by the pressure problem is avoided, and huge economic value is brought to the operation of a thermal power generating unit.
In some embodiments of the present invention, the above coal pulverizer hydraulic loading system further includes a self-filtering system, the self-filtering system includes a filtering loop and an oil return double-cylinder filter, the oil inlet end and the oil return end of the filtering loop are both communicated with the above oil tank, and the above oil return double-cylinder filter is installed on the filtering loop.
The filtering loop is communicated with the oil tank, so that the self-filtering system can run along with the loading system at the same time, impurities in the oil tank are removed, the impurity coverage rate in hydraulic oil is reduced, the cleanliness of the hydraulic oil is improved, and the running of equipment is ensured.
In some embodiments of the present invention, a cooling water system is further disposed in the self-filtering system, and the cooling water system and the filtering loop are communicated with each other.
The cooling water system can be used for cooling and heating the return oil of the loading system, so that the temperature of the hydraulic oil can be stabilized within a certain range, and the normal operation of equipment is prevented from being influenced by overhigh or overlow oil temperature.
In some embodiments of the present invention, the oil pump is a hydraulic tandem pump.
The hydraulic duplex pump adopts the same transmission shaft to drive the rotors of two pumps to rotate, the two pumps are connected together and driven by an electric return machine, the oil suction ports of the pumps are public, the answering oil ports are respectively separated, and the two flows output by the pumps can be used independently or in parallel.
In a second aspect, embodiments of the present application provide a coal mill including the above-described hydraulic loading system, and the above-described coal mill further includes a hydraulic deslagging system of the coal mill.
Compared with the prior art, the embodiment of the utility model has following advantage or beneficial effect at least:
1) this coal pulverizer hydraulic loading system prevents through setting up the impurity that filters in the filter oil case that impurity from entering into the normal operating that influences the loading return circuit in the loading return circuit, has increased hydraulic system's maintenance cycle, has alleviateed the manpower and has overhauld the cost, has increased the available man-hour of equipment, and this structural design is reasonable, and the practicality is strong.
2) The filter member is provided with the differential pressure alarm switch, so that the alarm can be timely given out to inform, the equipment failure rate is effectively reduced, the shutdown of the coal mill caused by the pressure problem is avoided, and the huge economic value is brought to the operation of a thermal power generating unit.
3) The cooling water system running simultaneously with the loading system can be used for cooling and heating the return oil of the loading system, so that the temperature of the hydraulic oil can be ensured to be stabilized within a certain range, and the normal running of equipment is prevented from being influenced by overhigh or overlow oil temperature.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic diagram of a hydraulic loading system of a coal mill provided in embodiment 1 of the present invention;
FIG. 2 is a schematic diagram of a prior art coal pulverizer hydraulic loading system;
fig. 3 is a schematic structural diagram of a hydraulic loading system of a coal mill provided in embodiment 1 of the present invention.
Icon: 100-a coal mill hydraulic loading system; 10-a motor; 11-a fuel tank; 12-an oil pump; 131-proportional relief valve; 132-actuator cylinder; 133-an accumulator; 14-an electrical control device; 15-high pressure double cartridge filter; 16-oil return dual cartridge filter; 17-cooling water system.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "upper", "lower", "inner", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the products of the present invention are usually placed when used, the description is only for convenience of description and simplification, but the indication or suggestion that the indicated device or element must have a specific position, be constructed and operated in a specific orientation, and thus, should not be interpreted as limiting the present invention.
In the description of the embodiments of the present invention, it should be further noted that unless explicitly stated or limited otherwise, the terms "disposed" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Example 1
Referring to fig. 1 and fig. 3, fig. 1 is a schematic diagram of a coal mill hydraulic loading system 100 provided in embodiment 1 of the present invention, and fig. 3 is a schematic structural diagram of the coal mill hydraulic loading system 100 provided in embodiment 1 of the present invention. An embodiment of the utility model provides a coal pulverizer hydraulic pressure loading system 100, it includes hydraulic oil subassembly and loading return circuit. The hydraulic oil assembly comprises a motor 10, an oil tank 11 and an oil pump 12, wherein the motor 10 drives the oil pump 12 to provide hydraulic oil for the system. Between the charging circuit and the hydraulic oil module there is a filter element which is provided for filtering impurities in the oil tank 11.
Fig. 2 is a schematic diagram of a hydraulic loading system of a coal pulverizer provided by the prior art. Compared with the prior art, the coal mill hydraulic loading system 100 is provided with the filtering piece to filter impurities in the oil filtering box 11, so that the impurities are prevented from entering the loading loop to influence the normal operation of the loading loop, the maintenance period of the hydraulic system is prolonged, the manpower maintenance cost is reduced, the available working hours of equipment are increased, and the structural design is reasonable and the practicability is high.
Referring to fig. 1 and 3 again, the charging circuit includes a pressure control valve, an actuator cylinder 132 and an accumulator 133, the pressure control valve and the actuator cylinder 132 are connected through a pipeline, and the accumulator 133 is installed on the charging circuit and is configured to absorb and slow pressure pulsation generated by the charging circuit.
It should be noted that the accumulator 133 is filled with nitrogen, and after being installed in the loading circuit, it can store rich oil in the loading circuit and also can supplement oil to the loading circuit to achieve oil balance during normal operation. Meanwhile, the hydraulic shock absorber can absorb pressure pulsation, so that hydraulic shock can be effectively absorbed, shock is reduced, and system stability is improved.
In the present embodiment, the pressure control valve is a proportional relief valve 131, and a filter is installed between the proportional relief valve 131 and the oil tank 11. It will be appreciated that the pressure control valves include pressure reducing valves, pressure relief valves and sequence valves. The proportional relief valve 131 is adopted as a pressure control valve to set oil pressure, and when the hydraulic oil pressure is high, the hydraulic oil is discharged back to the oil tank 11 to ensure that the hydraulic oil is at the set pressure, so that corresponding loading force is obtained.
As shown in fig. 1, the loading circuit further includes an electrical control device 14, and the electrical control device 14 is electrically connected to the pressure control valve. It can be understood that the electrical connection between the electrical control device 14 and the pressure control valve can control the pressure control valve, so as to ensure that the system can obtain corresponding loading force and improve the service efficiency of the system.
In this embodiment, the filter elements are high pressure double cartridge filters 15. It can be understood that the high-pressure double-cylinder filter 15 is composed of a reversing valve, a pressure balance valve, a bypass valve, a pollution blockage signal transmitter, two filter cylinders and the like, can realize the replacement of filter elements under the condition that the system does not shut down, can effectively control pollution, prolongs the service life of elements, and does not influence the normal operation of equipment due to the replacement of the filter elements.
It is also worth mentioning that the high-pressure double-cylinder filter 15 is provided with a differential pressure alarm switch. It can be understood that the differential pressure alarm switch can give an alarm in time to inform, so that the equipment failure rate is effectively reduced, the shutdown of the coal mill caused by the pressure problem is avoided, and great economic value is brought to the operation of the thermal power generator 10 group.
Referring to fig. 1 again, the coal mill hydraulic loading system further includes a self-filtering system, the self-filtering system includes a filtering loop and an oil return double-drum filter 16, both the oil inlet end and the oil return end of the filtering loop are communicated with the oil tank 11, and the oil return double-drum filter 16 is installed on the filtering loop.
The filtering loop is communicated with the oil tank 11, so that the self-filtering system can run along with the loading system at the same time, impurities in the oil tank 11 are removed, the impurity coverage rate of hydraulic oil is reduced, the cleanliness of the hydraulic oil is improved, and the running of equipment is ensured.
In this embodiment, a cooling water system 17 is further provided in the self-filtration system, and the cooling water system 17 and the filtration circuit communicate with each other.
It is worth to be noted that the cooling water system 17 can be used for cooling and heating the return oil of the loading system, so as to ensure that the temperature of the hydraulic oil can be stabilized within a certain range, and avoid the influence of too high or too low oil temperature on the normal operation of the equipment.
Specifically, in the present embodiment, the oil pump 12 is a hydraulic dual pump. It can be understood that the hydraulic duplex pump adopts the same transmission shaft to drive the rotors of the two pumps to rotate, the two pumps are connected together and driven by an electric loop machine, the oil suction ports of the pumps are public, the answering oil ports are respectively separated, and the two flows output by the pumps can be used independently or in parallel.
Example 2
The embodiment of the application provides a coal mill, which comprises the above coal mill hydraulic loading system 100, and the above coal mill further comprises a coal mill hydraulic slag discharging system, and has all the advantages.
In the embodiment, a high-pressure double-cylinder filter 15 is additionally arranged between the oil pump 12 and the proportional relief valve 131 of the coal mill hydraulic loading system 100, the filter is provided with a differential pressure alarm switch, and the precision of a filter screen of the filter is 0.5 mu m. When impurities exist in the oil tank 11, the impurities are sucked by the oil pump 12, the filter can effectively filter the impurities, and the problem of pressure caused by blockage of the proportional overflow valve 131 is avoided. Because the working pressure is 0-20MPa, a high-pressure filter is adopted. The double-drum filter is convenient for replacing the filter element, and the normal operation of the equipment is not influenced.
The provision of the high-pressure double-cartridge filter 15 solves the following problems:
1) the existing design structure adopts an oil return filtering mode, and impurities in the oil tank 11 easily enter the pressure control valve. 2) The existing structure has high requirements on the grade of oil products in the oil tank 11 of the hydraulic system, and the period for overhauling and filtering hydraulic oil is short. 3) The pressure control valve often breaks down, influences equipment normal operating, brings huge economic loss.
To sum up, embodiments of the present invention provide a coal mill hydraulic loading system 100 and a coal mill. The coal mill hydraulic loading system 100 includes a hydraulic oil assembly and a loading circuit. The hydraulic oil assembly comprises a motor 10, an oil tank 11 and an oil pump 12, wherein the motor 10 drives the oil pump 12 to provide hydraulic oil for the system. Between the charging circuit and the hydraulic oil module there is a filter element which is provided for filtering impurities in the oil tank 11. This coal pulverizer hydraulic pressure loading system 100 is through setting up filtering piece to impurity in the oil strain tank 11 prevents that impurity from entering into the normal operating that influences the loading return circuit in the loading return circuit, has increased hydraulic system's maintenance cycle, has alleviateed the manpower and has overhauld the cost, has increased the available man-hour of equipment, and this structural design is reasonable, and the practicality is strong.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A hydraulic loading system of a coal mill is characterized by comprising a hydraulic oil component and a loading loop,
the hydraulic oil component comprises a motor, an oil tank and an oil pump, and the motor drives the oil pump to provide hydraulic oil for the system;
a filter element is arranged between the loading loop and the hydraulic oil assembly, and the filter element is used for filtering impurities in the oil tank.
2. The coal pulverizer hydraulic loading system of claim 1, wherein the loading circuit includes a pressure control valve, an actuator cylinder, and an accumulator, the pressure control valve and the actuator cylinder being connected by a pipe, the accumulator being mounted on the loading circuit and configured to absorb and dampen pressure pulsations generated by the loading circuit.
3. The coal pulverizer hydraulic loading system of claim 2, wherein the pressure control valve is a proportional relief valve, and the filter element is mounted between the proportional relief valve and the oil tank.
4. The coal pulverizer hydraulic loading system of claim 2, further comprising an electrical control device in the loading circuit, the electrical control device being electrically connected to the pressure control valve.
5. The coal pulverizer hydraulic loading system of any one of claims 1-4, wherein the filter element is a high pressure dual cartridge filter.
6. The coal pulverizer hydraulic loading system of claim 5, wherein the high pressure double barrel filter is provided with a differential pressure alarm switch.
7. The coal mill hydraulic loading system of claim 1, further comprising a self-filtration system including a filtration circuit and a return oil dual-cartridge filter, the filtration circuit having an oil inlet end and an oil return end both in communication with the oil tank, the return oil dual-cartridge filter being mounted on the filtration circuit.
8. The hydraulic loading system for the coal pulverizer as recited in claim 7, wherein a cooling water system is further provided in the self-filtering system, and the cooling water system and the filtering circuit are in communication with each other.
9. The coal pulverizer hydraulic loading system of claim 1, wherein the oil pump is a hydraulic tandem pump.
10. A coal mill comprising the coal mill hydraulic loading system of any of claims 1-9, the coal mill further comprising a coal mill hydraulic deslagging system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021984704.4U CN212899190U (en) | 2020-09-11 | 2020-09-11 | Coal pulverizer hydraulic loading system and coal pulverizer |
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| CN202021984704.4U CN212899190U (en) | 2020-09-11 | 2020-09-11 | Coal pulverizer hydraulic loading system and coal pulverizer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113304865A (en) * | 2021-05-19 | 2021-08-27 | 北京京能电力股份有限公司 | Vibration-proof control system and method for coal mill and storage medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113304865A (en) * | 2021-05-19 | 2021-08-27 | 北京京能电力股份有限公司 | Vibration-proof control system and method for coal mill and storage medium |
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