CN111137686A - Pipeline coal conveying system interstation open-circuit starting and switching closed-circuit control system and method - Google Patents
Pipeline coal conveying system interstation open-circuit starting and switching closed-circuit control system and method Download PDFInfo
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- CN111137686A CN111137686A CN201911409283.4A CN201911409283A CN111137686A CN 111137686 A CN111137686 A CN 111137686A CN 201911409283 A CN201911409283 A CN 201911409283A CN 111137686 A CN111137686 A CN 111137686A
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- 239000003245 coal Substances 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims description 41
- 238000011144 upstream manufacturing Methods 0.000 claims description 12
- 239000002002 slurry Substances 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000003250 coal slurry Substances 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 3
- 241000233948 Typha Species 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 235000010185 Tamarix canariensis Nutrition 0.000 description 1
- 244000234281 Tamarix gallica Species 0.000 description 1
- 235000014265 Tamarix gallica Nutrition 0.000 description 1
- 235000010154 Tamarix ramosissima Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000008655 huaxian Substances 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/66—Use of indicator or control devices, e.g. for controlling gas pressure, for controlling proportions of material and gas, for indicating or preventing jamming of material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/04—Bulk
- B65G2201/045—Sand, soil and mineral ore
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Abstract
The invention discloses an interstation open-circuit starting and switching closed-circuit control system of a pipeline coal conveying system, which comprises a buffer tank, wherein an inlet valve a is arranged at the inlet of the buffer tank, the buffer tank is sequentially connected with a feeding pump system, a diaphragm pump pressurization system and a lower-stage pump station through pipelines G2, G3 and G5, the feeding pump system is connected with a water replacement system through a pipeline G3, the pipeline G3 is also connected with the inlet of the buffer tank through a pipeline G4, and the pipelines G2 and G3, the feed pump system comprises a feed pump system, a pipeline G3, a pipeline G5, a buffer tank G3, a knife gate valve, a main pipe valve a, a main pipe valve b and a main pipe valve d, wherein the knife gate valve, the main pipe valve a, the main pipe valve b and the main pipe valve d are respectively arranged on the G4 and the G5, an inlet valve b and an outlet valve b are respectively arranged at an inlet and an outlet of the feed pump system, a main pipe valve c is arranged at an outlet of the pipeline G3, which is located in a. The problems of high labor cost and low production efficiency in the prior art are solved.
Description
Technical Field
The invention belongs to the technical field of coal slurry pipe conveying devices, relates to a closed-circuit control system for starting and switching an open circuit between stations of a pipeline coal conveying system, and further relates to a closed-circuit control method for starting and switching an open circuit between stations of the pipeline coal conveying system.
Background
The Shenwei pipeline coal conveying project is a coal conveying pipeline with the largest scale and the longest conveying distance in the world, and is also the first long-distance coal conveying pipeline built in China. The total length of a project pipeline is 727 kilometers, the total investment calculated by engineering is 73 million yuan, the coal transportation quantity per design year is 1000 million tons, the coal slurry is 1623 million tons/year in 53% concentration, the head end of a pipeline is from Tamarix coal mine in Shenmu city of Shaanxi, the whole line passes through 18 counties of Shenmu, Yulin, Yanan and Weinan four cities, the whole line passes through (spans) 1537 places of engineering, wherein 60 tunnels are used, the total length is 55.3km, and the tunnel passes through 26 places of railways, 913 places and 74 places of rivers. A Shenmu production center (a Shenmu water supply station, a raw material coal storage and transportation, crushing and pulping, and pump conveying and pressurizing) is arranged below a pipeline coal conveying system, 4 middle pressurizing pump stations (a Jiaxian station, a Qing mountain station, an extension station and a Huanglong station), 5 block valve chambers, 1 process valve chamber, 1 energy storage type pressure regulating station, 1 energy dissipation station, 15 exhaust valve chambers, 58 pressure detection stations, 11 cathode protection stations and other line protection measures are arranged, and 3 terminal stations (a Typha station, a Weinan station and a Huaxian station) supply coal slurry to purifyed, Weihua and Shaanzied users and supply coal slurry to coal slurry dehydration external sales. Two branch booster pump stations are also arranged at the cattail city station. The project coal slurry design is distributed into 300 million tons/year, 180 million tons/year and 120 million tons/year.
At present, the open-circuit starting process of the power transmission station of the Shenwei pipeline coal conveying system and the open-circuit starting process of other power transmission system need manual operation to be completed according to steps, the requirement on operators is high, and in order to reduce labor cost and improve production operation efficiency, the interlocking automatic starting control of power transmission system equipment needs to be realized as early as possible.
Disclosure of Invention
The invention aims to provide a closed-circuit control system for the interstation open-circuit starting and switching of a pipeline coal conveying system, which solves the problems of high labor cost and low production and operation efficiency caused by the fact that the coal conveying system pump station open-circuit starting process needs manual operation and is completed step by step in the prior art.
The technical scheme adopted by the invention is that the pipeline coal conveying system interstation open-circuit starting and switching closed-circuit control system comprises a buffer tank, wherein the inlet of the buffer tank is injected into the upstream through a pipeline G1 to obtain slurry, the buffer tank is connected with the inlet of a feeding pump system through a pipeline G2, the outlet of the feeding pump system is connected with the outlet of a water replacement system and the inlet of a diaphragm pump pressurization system through a pipeline G3, and the outlet of the diaphragm pump pressurization system is connected with a lower-level pump station through a pipeline G5;
an inlet valve is arranged at the inlet of the buffer tank on the pipeline G1, an inlet valve a is arranged on the side, close to the upstream pulp, of the pipeline G1, a knife gate valve is arranged at the outlet of the buffer tank on the pipeline G2, an inlet valve b and an outlet valve b are respectively arranged at the inlet and the outlet of the feeding pump system, a dry pipe valve a is arranged on the pipeline G3, a pipeline G4 is further connected on the pipeline G3, the other end of the pipeline G4 is connected to the position, between the inlet valve and the inlet valve a, on the pipeline G1, a dry pipe valve b is arranged on the pipeline G4, a dry pipe valve c is arranged at the outlet of the pipeline G3, an inlet valve c and an outlet valve c are respectively arranged at the inlet and the outlet of the diaphragm pump pressurization system, a liquid level meter is further arranged on the buffer tank, a pressure transmitter is further arranged on the side, close to the buffer tank, on the pipeline G3, a, a pressure transmitter a is arranged on one side of the pipeline G3 close to the pressurization system of the diaphragm pump, and a pressure transmitter b is arranged on one side of the pipeline G1 close to the upstream slurry inlet of the inlet valve a;
the device also comprises an industrial personal computer, wherein the inlet valve, the inlet valve a, the knife gate valve, the inlet valve b, the outlet valve b, the main pipe valve a, the main pipe valve b, the main pipe valve c, the inlet valve c, the outlet valve c, the main pipe valve d, the liquid level meter, the pressure transmitter a and the pressure transmitter b are electrically connected with the industrial personal computer through cables.
The first aspect of the present invention is also characterized in that,
the feeding pump system comprises a plurality of feeding pumps arranged in parallel, an inlet valve b and an outlet valve b are respectively arranged at the inlet and the outlet of each feeding pump, one end of a pipeline G2, which is far away from the buffer tank, is divided into a plurality of parallel pipelines and is in one-to-one correspondence connection with the inlets of the feeding pumps, and one end of a pipeline G3, which is connected with the feeding pump system, is divided into a plurality of parallel pipelines and is in one-to-one correspondence connection with the outlets of the feeding pumps.
Three feeding pumps are arranged in parallel.
The diaphragm pump pressurization system comprises a plurality of diaphragm pumps arranged in parallel, an inlet and an outlet of each diaphragm pump are respectively provided with an inlet valve c and an outlet valve c, one end of the pipeline G3, which is connected with the diaphragm pump pressurization system, is divided into a plurality of pipelines and respectively corresponds to the inlet of the connected diaphragm pump, and one end of the pipeline G5, which is connected with the diaphragm pump pressurization system, is divided into a plurality of pipelines and respectively corresponds to the outlet of the connected diaphragm pump.
Six diaphragm pumps are arranged in parallel.
And a flow meter is further arranged on one side of the pipeline G5 close to the lower-stage pump station, and the flow meter is electrically connected with the industrial personal computer through a cable.
The second technical scheme adopted by the invention is that the pipeline coal conveying system interstation open-circuit starting and switching closed-circuit control method is implemented according to the following steps:
The second technical means of the present invention is also characterized in that
The open-circuit switching closed-circuit control method is implemented according to the following steps:
after the main pipe valve a is closed, the industrial personal computer starts timing, and if the timing reaches the stopping time value of the feeding pump system, if the pressure values of the pressure transmitters a are not lower than the set limit value of the pressure transmitter a, the industrial personal computer controls to execute the stopping operation of the feeding pump system;
and 4, the stopping operation of the feeding pump system is specifically as follows:
firstly, the industrial personal computer controls to close the outlet valve b and the feeding pump in sequence, after the feeding pump is closed, the industrial personal computer starts timing, and when the timing reaches the value of the waiting time for stopping the feeding pump, the industrial personal computer controls to close the inlet valve b and the knife gate valve in sequence, so that the open-circuit switching and the closed-circuit switching are completed.
And in the open-circuit starting process, the liquid level meter and the pressure transmitter monitor the liquid level value of the buffer tank and the outlet pressure value of the feeding pump system in real time and feed back the liquid level value and the outlet pressure value to the industrial personal computer, and if the liquid level value of the buffer tank is the lowest liquid level value and the monitoring value of the pressure transmitter is the lowest outlet pressure value of the feeding pump system, the industrial personal computer controls to close the diaphragm pump, the inlet valve c, the outlet valve c, the trunk valve d, the trunk valve a, the outlet valve b, the feeding pump, the inlet valve b and the knife gate valve.
The lowest liquid level value of the buffer tank is 2.5m, the lowest outlet pressure value of the feeding pump system is 0.35Mpa, the opening condition time value of the knife gate valve after the feeding pump system operates is 10s, the opening time interval of each diaphragm pump of the diaphragm pump pressurization system is 15s, the frequency lifting time interval of the diaphragm pumps is 10s, the limit value of the pressure transmitter b is 0.35Mpa, the closing condition time value of the dry pipe valve a is set to be 10s, the limit value of the pressure transmitter a is 0.35Mpa, the stopping time value of the feeding pump system is 30s, and the stopping waiting time value of the feeding pump is 30 s.
The invention has the beneficial effects that: according to the invention, the industrial personal computer is adopted to control each valve, so that manual operation is not required, the labor cost is reduced, and the production operation efficiency is improved.
Drawings
FIG. 1 is a schematic structural diagram of a closed-circuit control system for starting and switching an open circuit between stations of a pipeline coal conveying system;
FIG. 2 is a circuit connection diagram of the control system for the interstation open-circuit start-up and switching closed-circuit of the coal pipeline conveying system of the present invention.
In the figure, 1, a buffer tank, 2, a feeding pump system, 3, a water replacement system, 4, a diaphragm pump pressurization system, 5, a pressure transmitter, 6, an industrial personal computer, 7, an inlet valve a, 8, a knife gate valve, 9, an inlet valve b, 10, an outlet valve b, 11, a main pipe valve a, 12, a main pipe valve b, 13, a main pipe valve c, 14, an inlet valve c, 15, an outlet valve c, 16, a main pipe valve d, 17, a flowmeter, 18, a liquid level meter, 19, a pressure transmitter a, 20, a pressure transmitter b, 21 and an inlet valve are arranged.
2-1 parts of a feeding pump and 4-1 parts of a diaphragm pump.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention discloses an interstation open-circuit starting and switching closed-circuit control system of a pipeline coal conveying system, which has a structure shown in figure 1 and comprises a buffer tank 1, wherein an inlet of the buffer tank 1 is injected into an upstream to be pulped through a pipeline G1, the buffer tank 1 is connected with an inlet of a feeding pump system 2 through a pipeline G2, an outlet of the feeding pump system 2 is connected with an outlet of a replacement water system 3 and an inlet of a diaphragm pump pressurizing system 4 through a pipeline G3, and an outlet of the diaphragm pump pressurizing system 4 is connected with a lower-stage pump station through a pipeline G5;
an inlet valve 21 is arranged at the inlet of the buffer tank 1 on a pipeline G1, an inlet valve a7 is further arranged on one side of the pipeline G1 close to the upstream pulp inlet, a knife gate valve 8 is arranged at the outlet of the buffer tank 1 on a pipeline G2, an inlet valve b9 and an outlet valve b10 are respectively arranged at the inlet and the outlet of the feeding pump system 2, a dry pipe valve a11 is arranged on a pipeline G3, a pipeline G4 is further connected to the pipeline G3, the other end of the pipeline G4 is connected to a pipeline G1 at a position between the inlet valve 21 and the inlet valve a7, a dry pipe valve b12 is arranged on a pipeline G4, a dry pipe valve c13 is arranged at the outlet of the replacement water system 3 on a pipeline G3, an inlet valve c14 and an outlet valve c15 are respectively arranged at the inlet and the outlet of the diaphragm pump pressurization system 4, a liquid level meter 18 is further arranged on the buffer tank 1, a pressure transmitter 5 is further arranged on one side of the pipeline G3, a main pipe valve d16 is arranged on the pipe G5, a pressure transmitter a19 is further arranged on one side, close to the diaphragm pump pressurization system 4, of the pipe G3, and a pressure transmitter b20 is further arranged on one side, close to the upstream slurry inlet, of the inlet valve a7, of the pipe G1;
as shown in fig. 2, the industrial personal computer 6 is further included, and the inlet valve 21, the inlet valve a7, the knife gate valve 8, the inlet valve b9, the outlet valve b10, the main pipe valve a11, the main pipe valve b12, the main pipe valve c13, the inlet valve c14, the outlet valve c15, the main pipe valve d16, the liquid level meter 18, the pressure transmitter 5, the pressure transmitter a19 and the pressure transmitter b20 are all electrically connected with the industrial personal computer 6 through cables.
The feeding pump system 2 comprises a plurality of feeding pumps 2-1 which are arranged in parallel, an inlet and an outlet of each feeding pump 2-1 are respectively provided with an inlet valve b9 and an outlet valve b10, one end of a pipeline G2, which is far away from the buffer tank 1, is divided into a plurality of parallel pipelines and is connected with the inlets of the feeding pumps 2-1 in a one-to-one correspondence manner, and one end of a pipeline G3, which is connected with the feeding pump system 2, is divided into a plurality of parallel pipelines and is connected with the outlets of the feeding pumps 2-1 in a one-to-one.
Three feeding pumps 2-1 are arranged in parallel.
The diaphragm pump pressurizing system 4 comprises a plurality of diaphragm pumps 4-1 which are arranged in parallel, an inlet and an outlet of each diaphragm pump 4-1 are respectively provided with an inlet valve c14 and an outlet valve c15, one end of a pipeline G3, which is connected with the diaphragm pump pressurizing system 4, is divided into a plurality of pipelines and is respectively correspondingly connected with the inlet of the diaphragm pump 4-1, and one end of a pipeline G5, which is connected with the diaphragm pump pressurizing system 4, is divided into a plurality of pipelines and is respectively correspondingly connected with the outlet of the diaphragm pump 4-1.
Six diaphragm pumps 4-1 are arranged in parallel.
And a flow meter 17 is further arranged on one side of the pipeline G5 close to the lower stage pump station, and the flow meter 17 is electrically connected with the industrial personal computer 6 through a cable.
The invention discloses a closed-circuit control method for starting and switching an open circuit between stations of a pipeline coal conveying system, which adopts the closed-circuit control system for starting and switching the open circuit between the stations of the pipeline coal conveying system, and is implemented according to the following steps:
The open-circuit switching closed-circuit control method is implemented according to the following steps:
after the main pipe valve a11 is closed, the industrial personal computer 6 starts timing, if the timing reaches the stop time value of the feeding pump system 2, if the pressure value of the pressure transmitter a19 is not lower than the set limit value of the pressure transmitter a19, at the moment, the industrial personal computer 6 controls to execute the stop operation of the feeding pump system 2;
and 4, the stopping operation of the feeding pump system 2 is specifically as follows:
firstly, the industrial personal computer 6 controls to close the outlet valve b10 and the feeding pump 2-1 in sequence, after the feeding pump 2-1 is closed, the industrial personal computer 6 starts timing, and when the timing reaches the value of the waiting time for stopping the feeding pump 2-1, the industrial personal computer 6 controls to close the inlet valve b9 and the knife gate valve 8 in sequence, so that the open-circuit switching and the closed-circuit switching are completed.
During the open circuit starting, the liquid level meter 18 and the pressure transmitter 5 monitor the liquid level value of the buffer tank 1 and the outlet pressure value of the feeding pump system 2 in real time and feed back the liquid level value and the outlet pressure value to the industrial personal computer 6, and if the liquid level value of the buffer tank 1 is the lowest liquid level value and the monitoring value of the pressure transmitter 5 is the lowest outlet pressure value of the feeding pump system 2, the industrial personal computer 6 controls to close the diaphragm pump 4-1, the inlet valve c14, the outlet valve c15, the main pipe valve d16, the main pipe valve a11, the outlet valve b10, the feeding pump 2-1, the inlet valve b9 and the knife gate valve 8 in sequence.
The lowest liquid level value of the buffer tank 1 is 2.5m, the lowest outlet pressure value of the feeding pump system 2 is 0.35Mpa, the opening condition time value of the knife gate valve after the feeding pump system 2 operates is 10s, the opening time interval of each diaphragm pump 4-1 of the diaphragm pump pressurization system 4 is 15s, the frequency lifting time interval of the diaphragm pump 4-1 is 10s, the limiting value of the pressure transmitter b20 is 0.35Mpa, the closing condition time value of the dry pipe valve a11 is set to be 10s, the limiting value of the pressure transmitter a19 is 0.35Mpa, the stopping time value of the feeding pump system 2 is 30s, and the stopping waiting time value of the feeding pump 2-1 is 30 s.
Examples
The control method for the open-circuit starting and switching closed-circuit among the stations of the pipeline coal conveying system adopts the control system for the open-circuit starting and switching closed-circuit among the stations of the pipeline coal conveying system, and the structure is as follows: as shown in fig. 1, comprises a buffer tank 1, wherein the inlet of the buffer tank 1 is injected into the upstream for slurry feeding through a pipeline G1, the buffer tank 1 is connected with the inlet of a feeding pump system 2 through a pipeline G2, the outlet of the feeding pump system 2 is connected with the outlet of a replacement water system 3 and the inlet of a diaphragm pump pressurization system 4 through a pipeline G3, and the outlet of the diaphragm pump pressurization system 4 is connected with a lower stage pump station through a pipeline G5; an inlet valve 21 is arranged at the inlet of the buffer tank 1 on a pipeline G1, an inlet valve a7 is further arranged on one side of the pipeline G1 close to the upstream pulp inlet, a knife gate valve 8 is arranged at the outlet of the buffer tank 1 on a pipeline G2, an inlet valve b9 and an outlet valve b10 are respectively arranged at the inlet and the outlet of the feeding pump system 2, a dry pipe valve a11 is arranged on a pipeline G3, a pipeline G4 is further connected to the pipeline G3, the other end of the pipeline G4 is connected to a pipeline G1 at a position between the inlet valve 21 and the inlet valve a7, a dry pipe valve b12 is arranged on a pipeline G4, a dry pipe valve c13 is arranged at the outlet of the replacement water system 3 on a pipeline G3, an inlet valve c14 and an outlet valve c15 are respectively arranged at the inlet and the outlet of the diaphragm pump pressurization system 4, a liquid level meter 18 is further arranged on the buffer tank 1, a pressure transmitter 5 is further arranged on one side of the pipeline G3, a main pipe valve d16 is arranged on the pipeline G5, a pressure transmitter a19 is further arranged on one side, close to the diaphragm pump pressurization system 4, of the pipeline G3, a pressure transmitter b20 is further arranged on one side, close to the upstream slurry inlet, of the inlet valve a7, of the pipeline G1, and a flow meter 17 is further arranged on one side, close to the lower stage pump station, of the pipeline G5; the industrial personal computer 6 is further included, and the inlet valve 21, the inlet valve a7, the knife gate valve 8, the inlet valve b9, the outlet valve b10, the trunk valve a11, the trunk valve b12, the trunk valve c13, the inlet valve c14, the outlet valve c15, the trunk valve d16, the flowmeter 17, the liquid level meter 18, the pressure transmitter 5, the pressure transmitter a19 and the pressure transmitter b20 are all electrically connected with the industrial personal computer 6 through cables; the feeding pump system 2 comprises three feeding pumps 2-1 which are arranged in parallel, an inlet and an outlet of each feeding pump 2-1 are respectively provided with an inlet valve b9 and an outlet valve b10, one end of a pipeline G2, which is far away from the buffer tank 1, is divided into three parallel pipelines and is in one-to-one correspondence connection with the inlets of the feeding pumps 2-1, and one end of a pipeline G3, which is connected with the feeding pump system 2, is divided into three parallel pipelines and is in one-to-one correspondence connection with the outlets of the feeding pumps 2-1; the diaphragm pump pressurizing system 4 comprises six diaphragm pumps 4-1 which are arranged in parallel, an inlet and an outlet of each diaphragm pump 4-1 are respectively provided with an inlet valve c14 and an outlet valve c15, one end of a pipeline G3, which is connected with the diaphragm pump pressurizing system 4, is divided into six pipelines and is respectively and correspondingly connected with the inlet of the diaphragm pump 4-1, and one end of a pipeline G5, which is connected with the diaphragm pump pressurizing system 4, is divided into six pipelines and is respectively and correspondingly connected with the outlet of the diaphragm pump 4-1;
the method for controlling the interstation open-circuit starting of the pipeline coal conveying system is implemented according to the following steps:
step 3, the liquid level meter 18 monitors the liquid level value of the buffer tank 1 in real time and feeds the liquid level value back to the industrial personal computer 6 in real time, when the liquid level reaches 2.5m, the industrial personal computer 6 controls to open the knife gate valve 8, the inlet valve b9 and the feeding pump 2-1, after the feeding pump 2-1 is started, the industrial personal computer 6 starts timing, when the timing reaches 10s, the industrial personal computer 6 sends an electric signal to open the outlet valve b10, the main pipe valve a11, the inlet valve c14, the outlet valve c15, the main pipe valve d16 and start the first diaphragm pump 4-1, when the timing reaches 15s, the industrial personal computer 6 sends an electric signal to open the second industrial personal computer 4-1 and simultaneously performs zero clearing on the timing, after the second industrial personal computer 4-1 is opened, the industrial personal computer 6 starts timing, when the timing reaches the opening time interval of each 4-1 of the diaphragm pump pressurization system 4, the industrial personal computer 6 sends an electric signal to open the third diaphragm pump 4-1, so that the six diaphragm pumps 4-1 are all opened, at the moment, the industrial personal computer 6 sends the electric signal to simultaneously increase the frequency of each diaphragm pump 4-1 in the running state to 10HZ, the industrial personal computer 6 starts timing, when the timing reaches 10s, the industrial personal computer 6 sends the electric signal to simultaneously increase the frequency of each diaphragm pump 4-1 in the running state to 15HZ, so that the frequency is increased by 5HZ every time, meanwhile, the flow meter 17 monitors the output flow to the industrial personal computer 6 in real time, and when the output flow meets the conveying requirement, the increase of the frequency of each diaphragm pump 4-1 is stopped;
the open-circuit switching closed-circuit control method is implemented according to the following steps:
after the main pipe valve a11 is closed, the industrial personal computer 6 starts timing, and if the timing reaches 30s, and if the pressure value of the pressure transmitter a19 is not lower than 0.35Mpa, the industrial personal computer 6 controls and executes the stop operation of the feeding pump system 2;
and 4, the stopping operation of the feeding pump system 2 is specifically as follows:
firstly, the industrial personal computer 6 controls to close the outlet valve b10 and the feeding pump 2-1 in sequence, after the feeding pump 2-1 is closed, the industrial personal computer 6 starts timing, and when the timing reaches 30s, the industrial personal computer 6 controls to close the inlet valve b9 and the knife gate valve 8 in sequence, so that the open-circuit switching and the closed-circuit switching are completed.
Claims (10)
1. The system is characterized by comprising a buffer tank (1), wherein the inlet of the buffer tank (1) is injected upstream through a pipeline G1 to obtain slurry, the buffer tank (1) is connected with the inlet of a feeding pump system (2) through a pipeline G2, the outlet of the feeding pump system (2) is connected with the outlet of a water replacement system (3) and the inlet of a diaphragm pump pressurization system (4) through a pipeline G3, and the outlet of the diaphragm pump pressurization system (4) is connected with a lower-level pump station through a pipeline G5;
an inlet valve (21) is arranged at the inlet of the buffer tank (1) on the pipeline G1, an inlet valve a (7) is further arranged at one side, close to the upstream pulp inlet, of the pipeline G1, a knife gate valve (8) is arranged at the outlet of the buffer tank (1) on the pipeline G2, an inlet valve b (9) and an outlet valve b (10) are respectively arranged at the inlet and the outlet of the feeding pump system (2), a dry pipe valve a (11) is arranged on the pipeline G3, a pipeline G4 is further connected to the pipeline G3, the other end of the pipeline G4 is connected to the position, between the inlet valve (21) and the inlet valve a (7), on the pipeline G1, a dry pipe valve b (12) is arranged on the pipeline G4, a dry pipe valve c (13) is arranged at the outlet of the water replacement system (3) on the pipeline G3, an inlet and an outlet of the diaphragm pump pressurization system (4) are respectively provided with an inlet valve c (14) and an outlet valve, the buffer tank (1) is further provided with a liquid level meter (18), a pressure transmitter (5) is further arranged on one side, close to the buffer tank (1), of the dry pipe valve a (11) on the pipeline G3, a dry pipe valve d (16) is arranged on the pipeline G5, a pressure transmitter a (19) is further arranged on one side, close to the diaphragm pump pressurization system (4), of the pipeline G3, and a pressure transmitter b (20) is further arranged on one side, close to the upstream slurry inlet, of the inlet valve a (7) on the pipeline G1;
still include industrial computer (6), inlet valve (21), inlet valve a (7), knife gate valve (8), inlet valve b (9), outlet valve b (10), trunk valve a (11), trunk valve b (12), trunk valve c (13), inlet valve c (14), outlet valve c (15), trunk valve d (16), level gauge (18) and pressure transmitter (5), pressure transmitter a (19) and pressure transmitter b (20) all are connected through the cable electricity industrial computer (6).
2. The system for closed-loop control of open-loop starting and switching among the stations of the pipeline coal conveying system according to claim 1, wherein the feeding pump system (2) comprises a plurality of feeding pumps (2-1) which are arranged in parallel, an inlet and an outlet of each feeding pump (2-1) are respectively provided with an inlet valve b (9) and an outlet valve b (10), one end of the pipeline G2, which is far away from the buffer tank (1), is divided into a plurality of parallel pipelines and is connected with the inlets of the feeding pumps (2-1) in a one-to-one correspondence manner, and one end of the pipeline G3, which is connected with the feeding pump system (2), is divided into a plurality of parallel pipelines and is connected with the outlets of the feeding pumps (2-1) in a one-to-correspondence manner.
3. The interstation open-circuit starting and switching closed-circuit control system for the pipeline coal conveying system according to claim 2, wherein three feeding pumps (2-1) are arranged in parallel.
4. The system for controlling the on-off of the pipeline coal conveying system stations and the on-off of the pipeline coal conveying system stations according to the claim 1 or 2, wherein the diaphragm pump pressurization system (4) comprises a plurality of diaphragm pumps (4-1) which are arranged in parallel, an inlet valve c (14) and an outlet valve c (15) are respectively arranged at an inlet and an outlet of each diaphragm pump (4-1), one end of the pipeline G3, which is connected with the diaphragm pump pressurization system (4), is divided into a plurality of pipelines and is respectively correspondingly connected with the inlets of the diaphragm pumps (4-1), and one end of the pipeline G5, which is connected with the diaphragm pump pressurization system (4), is divided into a plurality of pipelines and is respectively correspondingly connected with the outlets of the diaphragm pumps (4-1).
5. The pipeline coal conveying system interstation open-circuit starting and switching closed-circuit control system according to claim 4, wherein six diaphragm pumps (4-1) are arranged in parallel.
6. The system for controlling the interstation open-circuit starting and switching closed-circuit control of the pipeline coal conveying system according to claim 4, wherein a flow meter (17) is further arranged on one side of the pipeline G5 close to a lower stage pump station, and the flow meter (17) is electrically connected with the industrial personal computer (6) through a cable.
7. The pipeline coal conveying system interstation open-circuit starting and switching closed-circuit control method is characterized in that the pipeline coal conveying system interstation open-circuit starting and switching closed-circuit control system is adopted, and the pipeline coal conveying system interstation open-circuit starting control method is implemented according to the following steps:
step 1, setting a lowest level value of a buffer tank (1), a lowest outlet pressure value of a feeding pump system (2), a starting level value of the feeding pump system (2) on an industrial personal computer, a knife gate valve starting condition time value after the feeding pump system (2) operates, a starting time interval of each diaphragm pump (4-1) of a diaphragm pump pressurization system (4) and a frequency lifting time interval of the diaphragm pump (4-1);
step 2, starting a power supply, transmitting an electric signal by an industrial personal computer (6) to open an inlet valve (21) and an inlet valve a (7), and closing other valves;
step 3, the liquid level meter (18) monitors the liquid level value of the buffer tank (1) in real time and feeds the liquid level value back to the industrial personal computer (6) in real time, when the liquid level reaches the opening liquid level value of the feeding pump system (2), the industrial personal computer (6) controls the opening knife gate valve (8), the inlet valve b (9) and the feeding pump (2-1), after the feeding pump (2-1) is started, the industrial personal computer (6) starts timing, when the timing reaches the opening condition time value of the knife gate valve after the feeding pump system (2) operates, the industrial personal computer (6) sends electric signals to open the outlet valve b (10), the main pipe valve a (11), the inlet valve c (14), the outlet valve c (15), the main pipe valve d (16) and start the first diaphragm pump (4-1), the industrial personal computer (6) starts timing after the first diaphragm pump (4-1) is started, and when the timing reaches the opening time interval of each diaphragm pump pressurizing system (4-1) The industrial personal computer (6) sends an electric signal to open the second diaphragm pump (4-1), timing and zero clearing are carried out simultaneously, after the second diaphragm pump (4-1) is opened, the industrial personal computer (6) starts timing, when the timing reaches the opening time interval of each diaphragm pump (4-1) of the diaphragm pump pressurization system (4), the industrial personal computer (6) sends an electric signal to open the third diaphragm pump (4-1), and thus, until all the diaphragm pumps (4-1) are opened, at the moment, the industrial personal computer (6) sends an electric signal to simultaneously increase the frequency of each diaphragm pump (4-1) in the running state to 10HZ, the industrial personal computer (6) starts timing, when the timing reaches the frequency increasing time interval of the diaphragm pumps (4-1), the industrial personal computer (6) sends an electric signal to simultaneously increase the frequency of each diaphragm pump (4-1) in the running state to 15H, therefore, 5HZ is increased every time, meanwhile, the flow meter (17) monitors output flow in real time and sends the output flow to the industrial personal computer (6), and when the output flow meets the conveying requirement, the increase of the frequency of each diaphragm pump (4-1) is stopped.
8. The method for controlling the open-circuit starting and the switching closed-circuit between the stations of the pipeline coal conveying system according to claim 7, wherein the method for controlling the open-circuit switching closed-circuit is implemented according to the following steps:
step 1, before operation, an open-circuit switching closed-circuit condition is set on an industrial personal computer (6), namely a limit value of a pressure transmitter b (20) is set, a closing condition time value of a main pipe valve a (11) is set, a limit value of a pressure transmitter a (19), a stopping time value of a feeding pump system (2) and a stopping waiting time value of a feeding pump (2-1) are set;
step 2, after the open circuit is started and the pressure transmitter b (20) normally operates, the monitored pressure value is fed back to the industrial personal computer (6) in real time, if the industrial personal computer (6) monitors that the pressure value of the pressure transmitter b (20) reaches the set limit value of the pressure transmitter b (20), the industrial personal computer (6) controls to sequentially open the main pipe valve b (12) and close the inlet valve (21), and after the inlet valve (21) is closed, the industrial personal computer (6) starts to time to reach the closing condition time value of the main pipe valve a (11), the industrial personal computer (6) controls to close the main pipe valve a (11); step 3, feeding the monitored pressure value back to the industrial personal computer (6) by the pressure transmitter a (19) in real time, and after the main pipe valve a (11) is closed, if the industrial personal computer (6) monitors that the pressure value of the pressure transmitter a (19) is lower than the set limit value of the pressure transmitter a (19), controlling to stop switching a closed circuit by the industrial personal computer (6), namely opening the inlet valve (21) and the main pipe valve a (11);
after a main pipe valve a (11) is closed, an industrial personal computer (6) starts timing, if the timing reaches a stopping time value of a feeding pump system (2), if the pressure value of a pressure transmitter a (19) is not lower than the set limit value of the pressure transmitter a (19), the industrial personal computer (6) controls to execute the stopping operation of the feeding pump system (2);
and 4, stopping the feeding pump system (2) specifically:
firstly, an industrial personal computer (6) controls to close an outlet valve b (10) and a feeding pump (2-1) in sequence, after the feeding pump (2-1) is closed, the industrial personal computer (6) starts timing, and when the timing reaches a value of waiting time for stopping the feeding pump (2-1), the industrial personal computer (6) controls to close an inlet valve b (9) and a knife gate valve (8) in sequence, so that open circuit switching and closed circuit switching are completed.
9. The method for controlling the open-circuit starting and the switching closed-circuit between the stations of the pipeline coal conveying system according to claim 8, wherein in the open-circuit starting, the level meter (18) and the pressure transmitter (5) monitor the level value of the buffer tank (1) and the outlet pressure value of the feeding pump system (2) in real time and feed back the level value to the industrial personal computer (6), and if the level value of the buffer tank (1) is the lowest level value and the monitored value of the pressure transmitter (5) is the lowest outlet pressure value of the feeding pump system (2), the industrial personal computer (6) controls to close the diaphragm pump (4-1), the inlet valve c (14), the outlet valve c (15), the dry pipe valve d (16), the dry pipe valve a (11), the outlet valve b (10), the feeding pump (2-1), the inlet valve b (9) and the knife gate valve (8) in sequence.
10. The method for controlling the interstation open-circuit starting and switching closed-circuit control of the pipeline coal conveying system according to claim 9, wherein the lowest level value of the buffer tank (1) is 2.5m, the lowest outlet pressure value of the feeding pump system (2) is 0.35Mpa, the opening condition time value of the knife gate valve after the operation of the feeding pump system (2) is 10s, the opening time interval of each diaphragm pump (4-1) of the diaphragm pump pressurization system (4) is 15s, the frequency lifting time interval of the diaphragm pump (4-1) is 10s, the limit value of the pressure transmitter b (20) is 0.35 s, the closing condition time value of the dry pipe valve a (11) is 10s, the limit value of the pressure transmitter a (19) is 0.35Mpa, the stop time value of the feeding pump system (2) is 30s, and the stop waiting time value of the feeding pump (2-1) is 30 s.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115509174A (en) * | 2022-10-25 | 2022-12-23 | 陕西神渭煤炭管道运输有限责任公司 | Control system and control method for pipeline coal conveying booster pump station |
Citations (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB854887A (en) * | 1957-01-17 | 1960-11-23 | Consolidation Coal Co | A pipeline system and controls therefor |
| CN101581401A (en) * | 2009-06-23 | 2009-11-18 | 云南大红山管道有限公司 | Online switching method of high-pressure long-distance slurry pipeline transmission multi-stage pump station |
| CN102230578A (en) * | 2011-05-26 | 2011-11-02 | 河海大学 | Double-pump multi-path high-precision filling device and control method thereof |
| CN102269329A (en) * | 2011-08-05 | 2011-12-07 | 云南大红山管道有限公司 | Automatic switching system and method for realizing transportation and storage of fluid materials |
| CN102862822A (en) * | 2012-10-22 | 2013-01-09 | 中煤科工集团武汉设计研究院 | Large-volume long-distance airtight relay pipeline coal handling system and method |
| CN202864467U (en) * | 2012-10-22 | 2013-04-10 | 中煤科工集团武汉设计研究院 | Sealed relay pipeline coal transporting system with large transportation volume and long distance |
| CN202868308U (en) * | 2012-10-18 | 2013-04-10 | 中煤科工集团武汉设计研究院 | Intermediate station pumping system device of long-distance pipeline coal transporting system |
| CN202884479U (en) * | 2012-10-31 | 2013-04-17 | 廊坊泛华石化设备有限公司 | Crude oil split-flow frequency conversion output control system |
| CN203147282U (en) * | 2013-02-22 | 2013-08-21 | 中煤科工集团武汉设计研究院 | Running system for long-distance pipeline coal slurry transportation of plurality of transportation pumps |
| CN103267228A (en) * | 2013-05-23 | 2013-08-28 | 中煤科工集团武汉设计研究院 | Control method for operation of devices of long-distance pipeline coal transporting intermediate station |
| CN103279092A (en) * | 2013-05-14 | 2013-09-04 | 中煤科工集团武汉设计研究院 | Centralized control system for long-distance pipeline coal transporting terminal station equipment and control method of centralized control system |
| CN104019370A (en) * | 2014-06-18 | 2014-09-03 | 云南大红山管道有限公司 | Pulp conveying system and method for simultaneously conveying materials to multiple stations through booster pump station |
| CN203907233U (en) * | 2014-06-18 | 2014-10-29 | 云南大红山管道有限公司 | Slurry pipeline conveying system for conveying materials to multiple stations from booster pump station |
| CN104197197A (en) * | 2014-09-09 | 2014-12-10 | 云南大红山管道有限公司 | On-line switching method for slurry and water in long-distance slurry pipeline transportation system |
| CN204213647U (en) * | 2014-10-24 | 2015-03-18 | 陕西神渭煤炭管道运输有限责任公司 | The blocking of a kind of long distance coal slurry pipeline is location and dredging indicating device accurately |
| CN204512955U (en) * | 2015-02-09 | 2015-07-29 | 中煤科工集团武汉设计研究院有限公司 | A kind of open circuit and closed circuit conveying switched system device |
| US20150338027A1 (en) * | 2013-01-10 | 2015-11-26 | Sumitomo Metal Mining Co., Ltd. | Slurry-transporting facility and slurry transportation control method |
| CN207586777U (en) * | 2017-12-11 | 2018-07-06 | 天津泰达新水源科技开发有限公司 | Inlet pumping station perseverance liquid level multistage volume control device |
| CN208919717U (en) * | 2018-09-20 | 2019-05-31 | 鞍钢集团矿业有限公司 | For controlling the intelligent controlling device of pipeline pulp density |
| CN209129067U (en) * | 2018-10-31 | 2019-07-19 | 四川省安普瑞自动化设备有限公司 | A kind of water management system |
| CN110486626A (en) * | 2019-08-26 | 2019-11-22 | 云南大红山管道有限公司 | A kind of long-distance slurry conveying pipeline multi-level pumping plant batch feed device and method |
| CN211870771U (en) * | 2019-12-31 | 2020-11-06 | 陕西神渭煤炭管道运输有限责任公司 | Pipeline coal conveying system interstation open-circuit starting and switching closed-circuit control system |
-
2019
- 2019-12-31 CN CN201911409283.4A patent/CN111137686A/en active Pending
Patent Citations (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB854887A (en) * | 1957-01-17 | 1960-11-23 | Consolidation Coal Co | A pipeline system and controls therefor |
| CN101581401A (en) * | 2009-06-23 | 2009-11-18 | 云南大红山管道有限公司 | Online switching method of high-pressure long-distance slurry pipeline transmission multi-stage pump station |
| CN102230578A (en) * | 2011-05-26 | 2011-11-02 | 河海大学 | Double-pump multi-path high-precision filling device and control method thereof |
| CN102269329A (en) * | 2011-08-05 | 2011-12-07 | 云南大红山管道有限公司 | Automatic switching system and method for realizing transportation and storage of fluid materials |
| CN202868308U (en) * | 2012-10-18 | 2013-04-10 | 中煤科工集团武汉设计研究院 | Intermediate station pumping system device of long-distance pipeline coal transporting system |
| CN102862822A (en) * | 2012-10-22 | 2013-01-09 | 中煤科工集团武汉设计研究院 | Large-volume long-distance airtight relay pipeline coal handling system and method |
| CN202864467U (en) * | 2012-10-22 | 2013-04-10 | 中煤科工集团武汉设计研究院 | Sealed relay pipeline coal transporting system with large transportation volume and long distance |
| CN202884479U (en) * | 2012-10-31 | 2013-04-17 | 廊坊泛华石化设备有限公司 | Crude oil split-flow frequency conversion output control system |
| US20150338027A1 (en) * | 2013-01-10 | 2015-11-26 | Sumitomo Metal Mining Co., Ltd. | Slurry-transporting facility and slurry transportation control method |
| CN203147282U (en) * | 2013-02-22 | 2013-08-21 | 中煤科工集团武汉设计研究院 | Running system for long-distance pipeline coal slurry transportation of plurality of transportation pumps |
| CN103279092A (en) * | 2013-05-14 | 2013-09-04 | 中煤科工集团武汉设计研究院 | Centralized control system for long-distance pipeline coal transporting terminal station equipment and control method of centralized control system |
| CN103267228A (en) * | 2013-05-23 | 2013-08-28 | 中煤科工集团武汉设计研究院 | Control method for operation of devices of long-distance pipeline coal transporting intermediate station |
| CN104019370A (en) * | 2014-06-18 | 2014-09-03 | 云南大红山管道有限公司 | Pulp conveying system and method for simultaneously conveying materials to multiple stations through booster pump station |
| CN203907233U (en) * | 2014-06-18 | 2014-10-29 | 云南大红山管道有限公司 | Slurry pipeline conveying system for conveying materials to multiple stations from booster pump station |
| CN104197197A (en) * | 2014-09-09 | 2014-12-10 | 云南大红山管道有限公司 | On-line switching method for slurry and water in long-distance slurry pipeline transportation system |
| CN204213647U (en) * | 2014-10-24 | 2015-03-18 | 陕西神渭煤炭管道运输有限责任公司 | The blocking of a kind of long distance coal slurry pipeline is location and dredging indicating device accurately |
| CN204512955U (en) * | 2015-02-09 | 2015-07-29 | 中煤科工集团武汉设计研究院有限公司 | A kind of open circuit and closed circuit conveying switched system device |
| CN207586777U (en) * | 2017-12-11 | 2018-07-06 | 天津泰达新水源科技开发有限公司 | Inlet pumping station perseverance liquid level multistage volume control device |
| CN208919717U (en) * | 2018-09-20 | 2019-05-31 | 鞍钢集团矿业有限公司 | For controlling the intelligent controlling device of pipeline pulp density |
| CN209129067U (en) * | 2018-10-31 | 2019-07-19 | 四川省安普瑞自动化设备有限公司 | A kind of water management system |
| CN110486626A (en) * | 2019-08-26 | 2019-11-22 | 云南大红山管道有限公司 | A kind of long-distance slurry conveying pipeline multi-level pumping plant batch feed device and method |
| CN211870771U (en) * | 2019-12-31 | 2020-11-06 | 陕西神渭煤炭管道运输有限责任公司 | Pipeline coal conveying system interstation open-circuit starting and switching closed-circuit control system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115509174A (en) * | 2022-10-25 | 2022-12-23 | 陕西神渭煤炭管道运输有限责任公司 | Control system and control method for pipeline coal conveying booster pump station |
| CN115509174B (en) * | 2022-10-25 | 2023-05-12 | 陕西神渭煤炭管道运输有限责任公司 | Control system and control method for pipeline coal conveying booster pump station |
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