CN111852563A - Composite pilot device, system and unloading valve for coal mine emulsification pump station - Google Patents
Composite pilot device, system and unloading valve for coal mine emulsification pump station Download PDFInfo
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- CN111852563A CN111852563A CN202010932335.2A CN202010932335A CN111852563A CN 111852563 A CN111852563 A CN 111852563A CN 202010932335 A CN202010932335 A CN 202010932335A CN 111852563 A CN111852563 A CN 111852563A
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- 239000002131 composite material Substances 0.000 title claims abstract description 26
- 239000003245 coal Substances 0.000 title claims abstract description 20
- 238000004945 emulsification Methods 0.000 title claims description 13
- 239000007788 liquid Substances 0.000 claims abstract description 58
- 230000001360 synchronised effect Effects 0.000 claims abstract description 4
- 239000002817 coal dust Substances 0.000 claims description 3
- 239000000839 emulsion Substances 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 37
- 238000004891 communication Methods 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000010998 test method Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/04—Distributing means for power supply in mines
- E21F17/08—Distributing hydraulic power; Pipe networks for hydraulic liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0603—Multiple-way valves
- F16K31/061—Sliding valves
- F16K31/0613—Sliding valves with cylindrical slides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention discloses a composite pilot device, a composite pilot system and an unloading valve for a coal mine emulsion pump station, and mainly relates to the field of unloading valves of emulsion pump stations. The device comprises an electromagnetic proportional valve and a three-channel pilot valve; the proportional push rod is matched and installed on the electromagnetic proportional valve, and the proportional push rod realizes the extension and retraction of at least three gears on a linear stroke through the electromagnetic control of the electromagnetic proportional valve; the three-channel pilot valve is internally provided with a pilot valve core with a linear reciprocating stroke, one end of the pilot valve core is connected with the outer end of the proportional push rod to enable the strokes of the pilot valve core and the proportional push rod to be synchronous, three liquid channel channels are arranged on a valve body of the three-channel pilot valve in parallel, the outer end of the pilot valve core is provided with an external medium interface, a communicating channel communicated with the medium channel is arranged on the side wall of the pilot valve core, and the three-gear stroke of the proportional push rod can enable the communicating channel to be communicated with the. The invention has the beneficial effects that: once the liquid passage in the unloading valve is blocked, the liquid passage can be automatically switched to the unblocked passage to continue normal operation.
Description
Technical Field
The invention relates to the field of unloading valves for emulsion pump stations, in particular to a composite pilot device, a composite pilot system and an unloading valve for a coal mine emulsion pump station.
Background
A single-fluid-channel electromagnetic pilot valve or a mechanical pilot valve is matched with a traditional electromagnetic/mechanical unloading valve (hereinafter referred to as a main valve) product for an emulsion pump station for a coal mine. The existing unloading valve product has the defect that the oil passage for control is easy to block, and once the liquid flow channel is blocked, the whole unloading valve is failed.
Meanwhile, an electromagnetic pilot valve (mechanical pilot valve) matched with a traditional electromagnetic/mechanical unloading valve is matched with a common electromagnet, namely the ejection length of an iron core is consistent with the retraction length of the coil after the coil is electrified, and the current input is constant, so that the opening and closing control can only be realized, and an adaptive relief means is lacked for the blocking condition of an oil passage, so that the blocking of a liquid flow passage becomes a main problem influencing the work of the unloading valve, and also becomes a core bottleneck causing the service life of the unloading valve.
Disclosure of Invention
The invention aims to provide a composite pilot device, a composite pilot system and an unloading valve for a coal mine emulsification pump station, which provide a plurality of switchable liquid channel channels, so that the liquid channel in the unloading valve can be automatically switched to a smooth channel to continue normal work once the liquid channel is blocked.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the composite pilot device for the coal mine emulsification pump station comprises an electromagnetic proportional valve and a three-channel pilot valve;
the electromagnetic proportional valve is provided with a proportional push rod for output in a matched manner, and the proportional push rod realizes the extension and retraction of at least three gears on a linear stroke through the electromagnetic control of the electromagnetic proportional valve;
the three-channel pilot valve is characterized in that a pilot valve core with a linear reciprocating stroke is installed in the three-channel pilot valve, one end of the pilot valve core is connected with the outer end of the proportional push rod to enable the strokes of the three-channel pilot valve and the proportional push rod to be synchronous, a first liquid flow channel, a second liquid flow channel and a third liquid flow channel are arranged on a valve body of the three-channel pilot valve in parallel, an external medium interface is arranged at the outer end of the pilot valve core, a medium channel communicated with an external medium interface is arranged in the pilot valve core, a communicating channel communicated with the medium channel is arranged on the side wall of the pilot valve core, and the communicating channel can be communicated with the first liquid flow channel, the second liquid flow channel and.
And the external medium interface is connected with a pressure medium pipe, and the pressure medium pipe is used for being communicated with a liquid path of the unloading valve.
The input voltage of the electromagnetic proportional valve is DC24V, the power is not more than 3W, and the maximum surface temperature of the proportional electromagnet of the electromagnetic proportional valve under the condition that coal dust is accumulated on the surface of the proportional electromagnet is not more than 150 ℃.
A composite pilot system for a coal mine emulsification pump station comprises the composite pilot device, a pressure acquisition module and a PLC control module;
the pressure acquisition module is configured on the pressure medium channel of the unloading valve and used for acquiring the pressure in the channel and the pressure in the valve cavity and feeding back a pressure signal by the PLC control module;
the PLC control module is used for acquiring pressure data of the pressure acquisition module, converting the pressure data into an electric signal in a proportional mode, and controlling the gears of the electromagnetic proportional valve according to the electric signal.
The pressure acquisition module comprises an explosion-proof intrinsically safe pressure sensor.
An unloading valve for a coal mine emulsification pump station comprises a main valve and a mechanical pilot valve which are matched with each other, and further comprises the composite pilot device, a pressure sensor and a PLC control module;
the pressure sensor is arranged on a main valve pressure medium pipe channel and is used for acquiring pressure data in the main valve;
the PLC control module is used for receiving pressure data, converting the pressure data into an electric signal in a proportional mode, and controlling the gear of the electromagnetic proportional valve according to the electric signal;
the main valve is communicated with a liquid path passage of the mechanical pilot valve through a pilot valve core of the three-channel pilot valve, and is alternatively communicated through a first liquid flow channel, a second liquid flow channel and a third liquid flow channel.
Compared with the prior art, the invention has the beneficial effects that:
this technique can realize automatic switching liquid flow channel through compound guide device, through the electromagnetism proportional valve, can realize the response to the voltage variation of uninstallation valve body internal liquid way access, mutually support between main valve, electromagnetism proportional valve and the three-channel pilot valve promptly, in case there is the passageway to block, but another passageway normal work of automatic switch, its theory of operation is: the pressure is collected by an explosion-proof intrinsically safe pressure sensor and is transmitted to a PLC system through an intrinsically safe explosion-proof circuit chip, the PLC sends different current instructions to an electromagnetic proportional valve according to the pressure, the proportional electromagnet realizes the proportional movement of a valve core of the proportional electromagnet according to the received current, the valve core of the electromagnetic proportional valve pushes a pilot valve push rod to realize the linear stroke position switching of three gears, once the pressure is increased, the movement distance moves in proportion according to the ratio of the current to the pressure according to the current, the butt joint of a first liquid flow channel, a second liquid flow channel and a third liquid flow channel and a communication channel is switched, so that the valve core is displaced to realize the opening of the main valve to be kept unblocked for a long time, and the loading or unloading.
Drawings
FIG. 1 illustrates the installation position and application state of a composite pilot device on a main valve;
FIG. 2 is an initial state of the compound pilot device after installation of the main valve;
FIG. 3 is a diagram of the operation of the composite pilot device automatically switching to the second flow path after the first flow path is blocked after the main valve is installed.
Fig. 4 is an operation state of the composite pilot device when the second flow passage and the second flow passage are blocked after the main valve is installed and then the composite pilot device is automatically switched to the third flow passage.
Fig. 5 is a flow chart for converting voltage data into an electric signal and amplifying the electric signal for output.
Reference numerals shown in the drawings:
1. a main valve; 2. a mechanical pilot valve; 3. an electromagnetic proportional valve; 4. a three-channel pilot valve; 5. a proportional valve core; 6. a proportional push rod; 7. a pilot valve spool; 8. a first flow channel; 9. a second liquid flow passage; 10. circulating a third liquid; 11. a media channel; 12. an external medium interface; 13. a pressure medium pipe.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the present application.
The instruments, reagents, materials and the like used in the following examples are conventional instruments, reagents, materials and the like in the prior art and are commercially available in a normal manner unless otherwise specified. Unless otherwise specified, the experimental methods, detection methods, and the like described in the following examples are conventional experimental methods, detection methods, and the like in the prior art.
Example 1: unloading valve with composite pilot device for coal mine emulsification pump station
The traditional mining electromagnetic/mechanical unloading valve (hereinafter referred to as main valve 1) product is matched with a single-fluid-channel electromagnetic pilot valve, or adopts a mechanical pilot valve instead of an electromagnetic pilot valve, and the biggest defect of the two traditional forms is that once the fluid channel of the pilot valve is blocked, the whole main valve 1 fails and cannot work. To overcome the blocking problem, the present example is designed as follows:
the main structure comprises a main valve 1 and a mechanical pilot valve 2 which are matched with each other for use, wherein the structure of the main valve 1 is consistent with that of an unloading valve of a traditional emulsion pump station for coal mines. As the innovation point of the scheme, the hydraulic control system further comprises a composite pilot system for ensuring the unblocked main valve 1 and the mechanical pilot valve 2, namely the hydraulic control system comprises: the system comprises an electromagnetic proportional valve 3, a three-channel pilot valve 4, a pressure sensor and a PLC control module.
The electromagnetic proportional valve 3 is connected with a power line, a proportional electromagnet and a proportional valve core 5 are installed in the electromagnetic proportional valve 3, a proportional push rod 6 synchronous with the proportional valve core 5 is connected to the proportional valve core 5, one end of the proportional push rod 6 extends out of the electromagnetic proportional valve 3 and serves as an output assembly of the electromagnetic proportional valve, and the proportional push rod 6 achieves stretching of at least three gears on a linear stroke through electromagnetic control of the electromagnetic proportional valve 3;
the designed high pressure ratio of the electromagnetic proportional valve 3 meets the requirement of the GB3836.4 standard, and the design key points and difficulties are as follows:
a. can be suitable for high pressure occasions (the pressure is between 32 and 40 Mpa) and can convert pressure signals into current signals in proportion;
b. different from a common pressure pilot valve, the valve compares the hydraulic pressure on the valve core with the electromagnetic attraction force of a proportional electromagnet, and the electromagnetic force can be changed by changing the current input into the proportional electromagnet, so that the moving distance of a proportional push rod 6 is changed, as shown in fig. 2, 3 and 4;
c. the application occasion of the valve is positioned under a coal mine, belongs to the inflammable and explosive occasion, and therefore the requirement of GB3836.4 standard regulation must be met. Input voltage DC24V, power is not more than 3W, and the maximum surface temperature of the proportional electromagnet when coal dust can be accumulated on the surface of the proportional electromagnet is not more than 150 ℃.
The main valve 1 is communicated with a liquid path passage of the mechanical pilot valve 2 through a pilot valve core 7 of the three-channel pilot valve 4, and is alternatively communicated through a first liquid flow channel 8, a second liquid flow channel 9 and a third liquid flow channel 10. The concrete structure is as follows:
the three-channel pilot valve 4 is internally provided with a pilot valve core 7 with a linear reciprocating stroke, one end of the pilot valve core 7 is connected with the outer end of the proportional push rod 6 to synchronize the strokes of the two, and the three-channel pilot valve also has linear stroke output of three gears, a valve body of the three-channel pilot valve 4 is provided with a first liquid flow channel 8, a second liquid flow channel 9 and a third liquid flow channel 10 in parallel, the outer end of the pilot valve core 7 is provided with an external medium interface 12, the external medium interface is connected with a pressure medium pipe 13, and the pressure medium pipe 13 is used for being communicated with a liquid path of the unloading valve. The three-gear stroke of the proportional push rod 6 can enable the communication channel to be respectively communicated with the first liquid flow channel 8, the second liquid flow channel 9 and the third liquid flow channel 10. The following of the pilot valve core 7 on the proportional push rod 6 respectively realizes the switching and one-way communication of a first liquid flow channel 8, a second liquid flow channel 9 and a third liquid flow channel 10 with a communication channel on three stroke gears. The communication channel and the external medium interface are respectively used as two inlet and outlet ports of the medium channel 11 and are used for being connected to the liquid channels of the main valve 1 and the mechanical pilot valve 2, so that the liquid channels of the main valve 1 and the mechanical pilot valve 2 are communicated in series through the medium channels, and the three channels of the first liquid channel 8, the second liquid channel 9 and the third liquid channel 10 are switched to ensure that the liquid channels of the main valve 1 and the mechanical pilot valve 2 obtain the communication guarantee of three parallel channels.
The pressure sensor is arranged above a pressure medium channel of the main valve 1 (unloading valve) and is used for acquiring pressure data in the main valve 1; the pressure sensor is used for obtaining pressure data in a pressure medium channel of the main valve 1, and whether a liquid path is blocked can be intuitively reflected according to the pressure data.
The PLC control module is used for acquiring pressure data of the pressure acquisition module, converting the pressure data into an electric signal in a proportional mode, and controlling the gear of the electromagnetic proportional valve 3 according to the electric signal. The main valve 1 and the pilot valve change the strokes of the proportional valve core 5 and the proportional push rod 6 according to the current signal size converted by the electromagnetic proportional valve 3 according to the pressure ratio, realize the displacement of the pilot valve core 7 and the push rod, and once a liquid flow channel is blocked, the other channel can be automatically switched to work normally.
The working principle of the unloading valve is as follows:
a. proportional control is adopted, wherein the proportional control is a control mode of continuously controlling hydraulic pressure and displacement of an actuating element in proportion according to a current signal converted from the hydraulic pressure;
b. the composite pilot mechanism is an electro-hydraulic conversion element and a power amplification element, wherein an electronic proportional amplifier converts an input electric signal into a corresponding current signal according to the magnitude of the voltage value of the input electric signal, the current signal is sent to a proportional electromagnet as the input quantity of the electromagnetic proportional valve 3, the electromagnet converts the current into a force acting on a proportional valve core 5, the current is increased, the output force is correspondingly increased, the force pushes the valve core and acts on a proportional push rod 6 to realize channel conversion, and the displacement of an execution element (push rod) can be controlled by the change of the input electric signal through the conversion process.
Example 2: performance testing of the unloader valve described in example 1
1. Basis of detection
The test method is specified by technical conditions of an unloading valve of an emulsion pump station for the MT/T188.3 coal mine.
2. Detection method
2.1 assembling the pilot system with the main valve 1 according to the requirements of the attached figure 1, opening the first flow channel 8 to perform the performance test with reference to the attached figure 2 (at this time, all three flow channels are not blocked), and the test results are shown in Table 1
Table 1 results of performance testing
| Name of item | Technical requirement seal number | Test method seal number | Test results |
| External leakage test | 4.5.2 | 5.2.1 | Meets the requirements |
| Internal leakage test | 4.5.3 | 5.2.2 | Meets the requirements |
| Nominal pressure unloading test | 4.5.4 | 5.2.3 | Meets the requirements |
| Nominal pressure recovery test | 4.5.4 | 5.2.4 | Meets the requirements |
| Pressure regulation range test | 4.5.4 | 5.2.5 | Meets the requirements |
| Pressure loss test | 4.5.4 | 5.2.6 | Meets the requirements |
| Overpressure unloading test | 4.5.6 | 5.2.7 | Meets the requirements |
| Dynamic characteristic test | 4.5.4 | 4.2.9 | Meets the requirements |
2.2 the pilot system is assembled with the main valve 1 according to the requirements of fig. 1, the valve core is moved forward to open the second flow channel 9 (at this time, the first flow channel 8 is in a blocked state), the performance test is carried out according to fig. 3, and the test results are shown in table 2.
Table 2 results of performance testing
| Name of item | Technical requirement seal number | Test method seal number | Test results |
| External leakage test | 4.5.2 | 5.2.1 | Meets the requirements |
| Internal leakage test | 4.5.3 | 5.2.2 | Meets the requirements |
| Nominal pressure unloading test | 4.5.4 | 5.2.3 | Meets the requirements |
| Nominal pressure recovery test | 4.5.4 | 5.2.4 | Meets the requirements |
| Pressure regulation range test | 4.5.4 | 5.2.5 | Meets the requirements |
| Pressure loss test | 4.5.4 | 5.2.6 | Meets the requirements |
| Overpressure unloading test | 4.5.6 | 5.2.7 | Meets the requirements |
| Dynamic characteristic test | 4.5.4 | 4.2.9 | Meets the requirements |
2.3 the pilot system is assembled with the main valve 1 according to the requirement of fig. 1, the valve core moves forward to open the third fluid flow 10 (at this time, the first fluid flow channel 8 and the second fluid flow channel 9 are in a blocking state), the performance test is carried out according to fig. 4, and the test results are shown in table 3.
Table 3 results of performance testing
| Name of item | Technical requirement seal number | Test method seal number | Test results |
| External leakage test | 4.5.2 | 5.2.1 | Meets the requirements |
| Internal leakage test | 4.5.3 | 5.2.2 | Meets the requirements |
| Nominal pressure unloading test | 4.5.4 | 5.2.3 | Meets the requirements |
| Nominal pressure recovery test | 4.5.4 | 5.2.4 | Meets the requirements |
| Pressure regulation range test | 4.5.4 | 5.2.5 | Meets the requirements |
| Pressure loss test | 4.5.4 | 5.2.6 | Meets the requirements |
| Overpressure unloading test | 4.5.6 | 5.2.7 | Meets the requirements |
| Dynamic characteristic test | 4.5.4 | 4.2.9 | Meets the requirements |
3. Evaluation of technical Effect
According to the technical condition test requirements of the unloading valve of the emulsion pump station for the MT/T188.3 coal mine, tests of the provisions of tables 1, 2 and 3 are respectively carried out according to the positions of the liquid flow channels specified by the figures 2, 3 and 4, and the test results all meet the standard specification requirements.
Claims (6)
1. The composite pilot device for the coal mine emulsification pump station is characterized by comprising an electromagnetic proportional valve and a three-channel pilot valve;
the electromagnetic proportional valve is provided with a proportional push rod for output in a matched manner, and the proportional push rod realizes the extension and retraction of at least three gears on a linear stroke through the electromagnetic control of the electromagnetic proportional valve;
the three-channel pilot valve is characterized in that a pilot valve core with a linear reciprocating stroke is installed in the three-channel pilot valve, one end of the pilot valve core is connected with the outer end of the proportional push rod to enable the strokes of the three-channel pilot valve and the proportional push rod to be synchronous, a first liquid flow channel, a second liquid flow channel and a third liquid flow channel are arranged on a valve body of the three-channel pilot valve in parallel, an external medium interface is arranged at the outer end of the pilot valve core, a medium channel communicated with an external medium interface is arranged in the pilot valve core, a communicating channel communicated with the medium channel is arranged on the side wall of the pilot valve core, and the communicating channel can be communicated with the first liquid flow channel, the second liquid flow channel and.
2. The composite pilot valve for the coal mine emulsification pump station according to claim 1, wherein a pressure medium pipe is connected to the external medium interface, and the pressure medium pipe is used for being communicated with a liquid path of the unloading valve.
3. The composite pilot valve for the coal mine emulsification pump station according to claim 1, wherein the input voltage of the electromagnetic proportional valve is DC24V, the power is not more than 3W, and the maximum surface temperature of the proportional electromagnet of the electromagnetic proportional valve under the condition that coal dust is accumulated on the surface of the proportional electromagnet is not more than 150 ℃.
4. A composite pilot system for a coal mine emulsification pump station is characterized by comprising a composite pilot device according to any one of claims 1 to 3, a pressure acquisition module and a PLC control module;
the pressure acquisition module is configured on the pressure medium channel of the unloading valve and used for acquiring the pressure in the channel and the pressure in the valve cavity and feeding back a pressure signal by the PLC control module;
the PLC control module is used for acquiring pressure data of the pressure acquisition module, converting the pressure data into an electric signal in a proportional mode, and controlling the gears of the electromagnetic proportional valve according to the electric signal.
5. The composite pilot system for the coal mine emulsification pump station according to claim 4, wherein the pressure acquisition module comprises an explosion-proof intrinsically safe pressure sensor.
6. An unloading valve for a coal mine emulsification pump station comprises a main valve and a mechanical pilot valve which are used in a matched mode, and is characterized by further comprising a composite pilot device, a pressure sensor and a PLC control module according to any one of claims 1-3;
the pressure sensor is arranged on a main valve pressure medium pipe channel and is used for acquiring pressure data in the main valve;
the PLC control module is used for receiving pressure data, converting the pressure data into an electric signal in a proportional mode, and controlling the gear of the electromagnetic proportional valve according to the electric signal;
the main valve is communicated with a liquid path passage of the mechanical pilot valve through a pilot valve core of the three-channel pilot valve, and is alternatively communicated through a first liquid flow channel, a second liquid flow channel and a third liquid flow channel.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010932335.2A CN111852563A (en) | 2020-09-08 | 2020-09-08 | Composite pilot device, system and unloading valve for coal mine emulsification pump station |
| LU500549A LU500549B1 (en) | 2020-09-08 | 2021-08-18 | Composite pilot device and system, and unloading valve for mine emulsion pump station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010932335.2A CN111852563A (en) | 2020-09-08 | 2020-09-08 | Composite pilot device, system and unloading valve for coal mine emulsification pump station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111852563A true CN111852563A (en) | 2020-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010932335.2A Pending CN111852563A (en) | 2020-09-08 | 2020-09-08 | Composite pilot device, system and unloading valve for coal mine emulsification pump station |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111852563A (en) |
| LU (1) | LU500549B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114087249A (en) * | 2021-11-18 | 2022-02-25 | 国能神东煤炭集团有限责任公司 | Electro-hydraulic pressure control system and control method |
-
2020
- 2020-09-08 CN CN202010932335.2A patent/CN111852563A/en active Pending
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2021
- 2021-08-18 LU LU500549A patent/LU500549B1/en active IP Right Grant
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114087249A (en) * | 2021-11-18 | 2022-02-25 | 国能神东煤炭集团有限责任公司 | Electro-hydraulic pressure control system and control method |
| CN114087249B (en) * | 2021-11-18 | 2023-05-26 | 国能神东煤炭集团有限责任公司 | Electrohydraulic pressure control system and control method |
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| Publication number | Publication date |
|---|---|
| LU500549B1 (en) | 2022-02-18 |
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