CN105781961A - Process pump unit machine seal cooling water circulation reuse device and application method thereof - Google Patents
Process pump unit machine seal cooling water circulation reuse device and application method thereof Download PDFInfo
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- CN105781961A CN105781961A CN201410824403.8A CN201410824403A CN105781961A CN 105781961 A CN105781961 A CN 105781961A CN 201410824403 A CN201410824403 A CN 201410824403A CN 105781961 A CN105781961 A CN 105781961A
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Abstract
The invention relates to the field of cooling equipment applying natural cold air or water, in particular to a process pump unit machine seal cooling water circulation reuse device and an application method thereof. The process pump unit machine seal cooling water circulation reuse device comprises a water tank (1), a water inlet pipe (31) and a water outlet pipe (32), and is characterized by further comprising a pump unit (2), a cooling water pipe (33), a water return pipe (34), a water replenishing pipe (35), a water replenishing valve (41), an adjusting valve (42), a water pump (51), a filter (52), a cooler (53) and the like. The application method of the process pump unit machine seal cooling water circulation reuse device is characterized by comprising the steps of: (q) water replenishing of the water tank; (b) machine seal cooling; (c) water temperature control; and (d) water pressure control. The process pump unit machine seal cooling water circulation reuse device is low in energy consumption, small in floor area and high in automation degree.
Description
Technical field
The present invention relates to the cooling device field of application aturally-cold air or water, be specially a kind of technique pump group machine seal cooling water round-robin device and using method thereof.
The present invention relates to the round-robin system of the technique pump group machine seal cooling water of cold rolling and strip processing line blood circulation and device, including the control method related in native system device and measure.
Background technology
At present, on cold rolling and strip steel process for producing line (including galvanizing unit, tin plating unit, continuous annealing unit, pickling unit, emulsion of rolling mill blood circulation etc.), technique pump group many employings mechanical seal pattern, and mechanical seal sealing surface at work is relative motion, the too high meeting of temperature causes vaporization, damage mechanical seal, it is necessary to adopt cooling water that mechanical seal is implemented cooling.
In existing unit, entering effluent pit final to being situated between waste water workshop after cooling water many employings industry water first use after being directly discharged into waste water trench, serious waste water resource, increases once investment and the operating cost of Waste Water Treatment on the other hand on the one hand.
Technology is currently also had to attempt to reclaim with round-robin to cooling water, but not can solve in water quality in how ensureing cooling water circulation multiplex process, the water yield, hydraulic pressure and water temperature are several, and cannot uninterruptedly supply water continuously under nonserviceabling, this causes that cooling water circulation multiplex technique is difficult in adapt to working condition, it is impossible to promote the use of.
Summary of the invention
In order to overcome the defect of prior art, it is provided that a kind of cooling water of saving can meet again the cooling means of round-robin requirement, the invention discloses a kind of technique pump group machine seal cooling water round-robin device and using method thereof.
The present invention reaches goal of the invention by following technical solution:
A kind of technique pump group machine seal cooling water round-robin device, including water tank, water inlet pipe, outlet pipe and pump with mechanical seal group, water tank is by top board, base plate and side plate piece together enclosed type housing, water tank is provided with water inlet, outlet, water return outlet and gap, the water inlet of water tank connects moisturizing water source by water inlet pipe, the outlet of water tank connects pump with mechanical seal group by outlet pipe, it is characterized in that: also include cooling water pipe, return pipe, filling pipe, pump group water pipe, water compensating valve, regulate valve, water intaking valve, water pump, filter, cooler, conductivity meter, liquid level sensor, temperature sensor, pressure transducer and controller,
The water inlet of water tank and water return outlet are all located at the top of water tank, the outlet of water tank is located at the bottom of water tank, the water return outlet of water tank and gap are located at the side of water tank, the water inlet of water tank and outlet are located at the opposite side of water tank, after electrical conductivity raises and opens water compensating valve, the new water supplemented injects from the side of water tank, and overflow water outlet is flowed out from the opposite side of casing, the water that electrical conductivity is high is preferentially discharged in water tank, so that electrical conductivity of water declines in water tank；
Water inlet pipe is in series with water compensating valve；
The outlet of water tank connects the front end of outlet pipe, outlet pipe is sequentially connected in series one group of heat exchange unit of water pump, filter and cooler from front to back, another group heat exchange unit of cooler is connected on cooling water pipe, two groups of mutual heat exchanges of heat exchange unit of cooler, cooling water pipe is also in series with adjustment valve, cooling water pipe internal recycle cooling water supply；
The water return outlet of water tank connects back to water pipe；
Connect with the filling pipe being in series with water compensating valve between water inlet pipe and outlet pipe；
Pump group unit includes water intaking valve, pump with mechanical seal group and pump group water pipe, water intaking valve and pump with mechanical seal group and is sequentially connected in series on pump group water pipe, and each pump group unit is connected in parallel between outlet pipe and return pipe successively；
It is provided with conductivity meter and liquid level sensor in water tank, between cooler and the pump group unit of outlet pipe, is provided with temperature sensor and pressure transducer；
Pump with mechanical seal group, water compensating valve, adjustment valve, water intaking valve, water pump, conductivity meter, liquid level sensor, temperature sensor and pressure transducer all connect controller by holding wire, are provided with the higher limit H of cistern water level in controllerMaxWith lower limit Hmin, water tank inner storing water electrical conductivity higher limit GMaxWith lower limit Gmin, the higher limit T of water temperature in outlet pipeMaxWith lower limit Tmin, water outlet inner pipe water pressure higher limit PMaxWith lower limit Tmin。
Described technique pump group machine seal cooling water round-robin device, is characterized in that:
The submerged pump that frequency conversion motor drives selected by water pump, if the quantity of water pump is connected on outlet pipe more than after being connected in parallel composition water pump group between 1 Tai Shizegetai water pump again, water pump and cooler are all fixed on the top board of water tank, form integrated apparatus to reduce floor space；
Water compensating valve and water intaking valve all select electromagnetic valve, regulate valve and select pneumatic operated valve, and Y type selected by filter, and Programmable Logic Controller selected by controller.
The using method of described technique pump group machine seal cooling water round-robin device, is characterized in that: implement as follows:
A. water tank moisturizing: if liquid level sensor records the water level in water tank and is down to lower limit HminTime, or, if the electrical conductivity that conductivity meter records water tank inner storing water rises to higher limit GMaxTime, controller controls the water compensating valve on water inlet pipe and opens, by water inlet pipe from moisturizing water source to water tank moisturizing, until water level rises to higher limit HMaxAnd electrical conductivity is down to lower limit GminTime, controller controls the water compensating valve on water inlet pipe and cuts out, and stops moisturizing, so keeps the water level in water tank at HminTo HMaxBetween, and electrical conductivity of water is at GminTo GMax, it is ensured that follow-up water pump energy normal water supply, it is maintained with stablizing of water quality；
B. machine envelope cooling: interlocked control all implemented by pump with mechanical seal group and water intaking valve, pump with mechanical seal group and water pump, when pump with mechanical seal group is run, controller controls water intaking valve unlatching, water pump operation, and when pump with mechanical seal group is stopped transport, controller controls water intaking valve cut out, water pump is stopped transport；
During water pump operation, water pump transfers to each pump group unit from shedder seal cooling water in water tank through outlet pipe and implements cooling to each pump with mechanical seal group, outlet pipe is provided with filter to be implemented to filter to machine seal cooling water, if the quantity of water pump is more than 1, and another 1 water pump startup optimization immediately when 1 water pump is stopped transport；
The pump with mechanical seal group of pump group unit is implemented after cooling from return pipe reflow tank by machine seal cooling water；
C. water temperature controls: machine seal cooling water temperature after the heat absorbing pump with mechanical seal group rises, if the water temperature that temperature sensor records in outlet pipe rises to higher limit TMaxTime, controller control and regulation valve is opened, and cooling water pipe internal recycle cooling water supply, the machine seal cooling water in outlet pipe is implemented cooling by two groups of mutual heat exchanges of heat exchange unit by cooler, until water temperature is down to lower limit TminTime, controller control and regulation valve cuts out, and stops cooling, so keeps the water temperature in outlet pipe at TminTo TMaxBetween；
D. hydraulic pressure control: the outlet pipe for prevent from having connected filter and cooler affects the properly functioning of pump with mechanical seal group because of blocking, if pressure transducer records the hydraulic pressure in outlet pipe and is down to lower limit PminTime, controller controls the water compensating valve on filling pipe and opens, and the water at moisturizing water source is flowed directly to outlet pipe from water inlet pipe through filling pipe and flow to pump group water pipe again to the enforcement cooling of pump with mechanical seal group, until hydraulic pressure rises to higher limit PMaxTime, controller controls the water compensating valve on filling pipe and cuts out, and stops direct moisturizing.
The using method of described technique pump group machine seal cooling water round-robin device, is characterized in that:
During step b, water pump adopts VFC, and the hydraulic pressure value that the incoming frequency of water pump records according to the pressure transducer on outlet pipe is implemented PID regulable control by controller, it is ensured that the pressure of supply water of machine seal cooling water in outlet pipe, reaches the effect of energy efficient；
During step c, the water temperature value that the aperture of adjustment valve records according to the temperature sensor on outlet pipe is implemented PID regulable control by controller, thus maintaining the temperature range of machine seal cooling water in outlet pipe.
The invention solves the water yield in machine seal cooling water round-robin process, hydraulic pressure, water temperature, the problems such as the water supply of water quality and malfunction, solve machine seal cooling water in current system in line cause water resource serious waste and indirectly make Waste Water Treatment once invest and operating cost increase problem, reach the function of full-automatic fault-free multiplexing, and by arranging variable frequency water supply pump, system energy consumption is reduced further, the present invention (includes galvanizing unit except can be applicable to cold rolling and strip processing line, tin plating unit, continuous annealing unit, pickling unit, emulsion of rolling mill blood circulation etc.) etc. outside field, apply also in other technique pump group systems of metallurgy industry, and can be applied in the technique pump group system of chemical industry by further genralrlization.
The present invention is reliable and stable, has the perfect functions of physical supply such as guarantee water quality, the water yield and water temperature, and can guarantee that the ability ensureing uninterrupted water supply in the state of accident, and it is low to have energy consumption, and floor space is little, automaticity advantages of higher.The invention has the beneficial effects as follows:
(1) Liquid level is passed through, it is ensured that the normal automatic water supplement of industrial water tank；
(2) controlled by temperature, it is ensured that the temperature of machine seal cooling water round-robin；
(3) Stress control is passed through, it is ensured that the pressure of machine seal cooling water round-robin；
(4) by the interlocked control of pressure transmitter and pipeline water compensating valve, it is ensured that under nonserviceabling, pipeline water compensating valve is automatically turned on, it is ensured that the continuous non-interruptible supply under nonserviceabling；
(5) controlled by electrical conductivity, it is ensured that the water quality of machine seal cooling water round-robin；
(6) integrated design, floor space is little；
(7) adopting PLC to control, automaticity is high；
(8) variable frequency pump is adopted, it is ensured that in the situation that technique pump group working barrel reduces, variable frequency pump is controlled, reduces energy consumption.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the connection diagram of pump with mechanical seal group in the present invention, water compensating valve, adjustment valve, water intaking valve, water pump, conductivity meter, liquid level sensor, temperature sensor, pressure transducer and controller.
Detailed description of the invention
The present invention is further illustrated below by way of specific embodiment.
Embodiment 1
A kind of technique pump group machine seal cooling water round-robin device, including water tank 1, pump with mechanical seal group 21, water inlet pipe 31, outlet pipe 32, cooling water pipe 33, return pipe 34, filling pipe 35, pump group water pipe 36, water compensating valve 41, regulate valve 42, water intaking valve 43, water pump 51, filter 52, cooler 53, conductivity meter 61, liquid level sensor 62, temperature sensor 63, pressure transducer 64 and controller 7, as it is shown in figure 1, concrete structure is:
Water tank 1 is by top board, base plate and side plate piece together enclosed type housing, water tank 1 is provided with water inlet, outlet, water return outlet and gap, the water inlet of water tank 1 and water return outlet are all located at the top of water tank 1, the outlet of water tank 1 is located at the bottom of water tank 1, the water return outlet of water tank 1 and gap are located at the side of water tank 1, the water inlet of water tank 1 and outlet are located at the opposite side of water tank 1, after electrical conductivity raises and opens water compensating valve 41, the new water supplemented injects from the side of water tank 1, overflow water outlet is flowed out from the opposite side of casing, the water that electrical conductivity is high is discharged from preferential in water tank 1, so that electrical conductivity of water declines in water tank 1；
The water inlet of water tank 1 connects moisturizing water source by being in series with the water inlet pipe 31 of water compensating valve 41；
The outlet of water tank 1 connects the front end of outlet pipe 32, outlet pipe 32 is sequentially connected in series one group of heat exchange unit of water pump 51, filter 52 and cooler 53 from front to back, another group heat exchange unit of cooler 53 is connected on cooling water pipe 33, two groups of mutual heat exchanges of heat exchange unit of cooler 53, cooling water pipe 33 is also in series with adjustment valve 42, cooling water pipe 33 internal recycle cooling water supply；
The water return outlet of water tank 1 connects back to water pipe 34；
Connect with the filling pipe 35 being in series with water compensating valve 41 between water inlet pipe 31 and outlet pipe 32；
Pump group unit 2 includes water intaking valve 43, pump with mechanical seal group 21 and pump group water pipe 36, water intaking valve 43 and pump with mechanical seal group 21 and is sequentially connected in series on pump group water pipe 36, and each pump group unit 2 is connected in parallel between outlet pipe 32 and return pipe 34 successively；
It is provided with conductivity meter 61 and liquid level sensor 62 in water tank 1, between cooler 53 and the pump group unit 2 of outlet pipe 32, is provided with temperature sensor 63 and pressure transducer 64；
As shown in Figure 2, pump with mechanical seal group 21, water compensating valve 41, adjustment valve 42, water intaking valve 43, water pump 51, conductivity meter 61, liquid level sensor 62, temperature sensor 63 and pressure transducer 64 all pass through holding wire and connect controller 7, are provided with the higher limit H of water tank 1 water level in controller 7MaxWith lower limit Hmin, water tank 1 inner storing water electrical conductivity higher limit GMaxWith lower limit Gmin, the higher limit T of water temperature in outlet pipe 32MaxWith lower limit Tmin, the higher limit P of hydraulic pressure in outlet pipe 32MaxWith lower limit Tmin。
In the present embodiment, the submerged pump that frequency conversion motor drives selected by water pump 51, if the quantity of water pump 51 is more than being connected on outlet pipe 32 again after being connected in parallel composition water pump group between 1 Tai Shizegetai water pump 51, water pump 51 and cooler 53 are all fixed on the top board of water tank 1, form integrated apparatus to reduce floor space；
In Fig. 1, arrow show water (flow) direction；For the purpose of simplicity is clear, in Fig. 1, water pump 51 and cooler 53 are not all drawn in water tank 1.
Water compensating valve 41 and water intaking valve 43 all select electromagnetic valve, regulate valve 42 and select pneumatic operated valve, filter 52 to select Y type, and Programmable Logic Controller selected by controller 7.
When the present embodiment uses, implement as follows:
A. water tank moisturizing: if liquid level sensor 62 records the water level in water tank 1 and is down to lower limit HminTime, or, if the electrical conductivity that conductivity meter 61 records water tank 1 inner storing water rises to higher limit GMaxTime, the water compensating valve 41 that controller 7 controls on water inlet pipe 31 is opened, by water inlet pipe 31 from moisturizing water source to water tank 1 moisturizing, until water level rises to higher limit HMaxAnd electrical conductivity is down to lower limit GminTime, the water compensating valve 41 that controller 7 controls on water inlet pipe 31 is closed, and stops moisturizing, so keeps the water level in water tank 1 at HminTo HMaxBetween, and electrical conductivity of water is at GminTo GMax, it is ensured that follow-up water pump 51 energy normal water supply, it is maintained with stablizing of water quality；
B. machine envelope cooling: interlocked control all implemented by pump with mechanical seal group 21 and water intaking valve 43, pump with mechanical seal group 21 and water pump 51, when pump with mechanical seal group 21 is run, controller 7 controls that water intaking valve 43 is opened, water pump 51 runs, when pump with mechanical seal group 21 is stopped transport, controller 7 controls that water intaking valve 43 is closed, water pump 51 is stopped transport；
When water pump 51 runs, water pump 51 transfers to each pump group unit 2 from shedder seal cooling water in water tank 1 through outlet pipe 32 and implements cooling to each pump with mechanical seal group 21, outlet pipe 32 is provided with filter 52 to be implemented to filter to machine seal cooling water, if the quantity of water pump 51 is more than 1, and another 1 water pump 51 startup optimization immediately when 1 water pump 51 is stopped transport；
The pump with mechanical seal group 21 of pump group unit 2 is implemented after cooling from return pipe 34 reflow tank 1 by machine seal cooling water；
If the total quantity of pump group unit 2 is n, the cooling water inflow needed for every pump with mechanical seal group 21 is Q, then the specified output flow needed for feed pump 51 is nQ, and pressure is P；In the present embodiment, water pump 51 adopts VFC, the hydraulic pressure value that the incoming frequency of water pump 51 records according to the pressure transducer 64 on outlet pipe 32 is implemented PID regulable control by controller 7, it is ensured that the pressure of supply water of machine seal cooling water in outlet pipe 32, reaches the effect of energy efficient；
C. water temperature controls: machine seal cooling water temperature after the heat absorbing pump with mechanical seal group 21 rises, if the water temperature that temperature sensor 63 records in outlet pipe 32 rises to higher limit TMaxTime, controller 7 controls to adjust valve 42 and opens, cooling water pipe 33 internal recycle cooling water supply, and the machine seal cooling water in outlet pipe 32 is implemented cooling by two groups of mutual heat exchanges of heat exchange unit by cooler 53, until water temperature is down to lower limit TminTime, controller 7 controls to adjust valve 42 and cuts out, and stops cooling, so keeps the water temperature in outlet pipe 32 at TminTo TMaxBetween；
In the present embodiment, the water temperature value that the aperture of adjustment valve 42 records according to the temperature sensor 63 on outlet pipe 32 is implemented PID regulable control by controller 7, thus maintaining the temperature range of machine seal cooling water in outlet pipe 32；
D. hydraulic pressure control: the outlet pipe 32 for prevent from having connected filter 52 and cooler 53 affects the properly functioning of pump with mechanical seal group 21 because of blocking, if pressure transducer 64 records the hydraulic pressure in outlet pipe 32 and is down to lower limit PminTime, the water compensating valve 41 that controller 7 controls on filling pipe 35 is opened, and the water at moisturizing water source is flowed directly to outlet pipe 32 from water inlet pipe 31 through filling pipe 35 and flow to pump group water pipe 36 again to pump with mechanical seal group 21 enforcement cooling, until hydraulic pressure rises to higher limit PMaxTime, the water compensating valve 41 that controller 7 controls on filling pipe 35 is closed, and stops direct moisturizing.
Claims (4)
- null1. a technique pump group machine seal cooling water round-robin device，Including water tank (1)、Water inlet pipe (31)、Outlet pipe (32) and pump with mechanical seal group (21)，Water tank (1) is by top board、Base plate and side plate piece together enclosed type housing，Water tank (1) is provided with water inlet、Outlet、Water return outlet and gap，The water inlet of water tank (1) connects moisturizing water source by water inlet pipe (31)，The outlet of water tank (1) connects pump with mechanical seal group (21) by outlet pipe (32)，It is characterized in that: also include cooling water pipe (33)、Return pipe (34)、Filling pipe (35)、Pump group water pipe (36)、Water compensating valve (41)、Regulate valve (42)、Water intaking valve (43)、Water pump (51)、Filter (52)、Cooler (53)、Conductivity meter (61)、Liquid level sensor (62)、Temperature sensor (63)、Pressure transducer (64) and controller (7)，The water inlet of water tank (1) and water return outlet are all located at the top of water tank (1), the outlet of water tank (1) is located at the bottom of water tank (1), the water return outlet of water tank (1) and gap are located at the side of water tank (1), and the water inlet of water tank (1) and outlet are located at the opposite side of water tank (1)；Water inlet pipe (31) is in series with water compensating valve (41)；The outlet of water tank (1) connects the front end of outlet pipe (32), outlet pipe (32) is sequentially connected in series one group of heat exchange unit of water pump (51), filter (52) and cooler (53) from front to back, another group heat exchange unit of cooler (53) is connected on cooling water pipe (33), two groups of mutual heat exchanges of heat exchange unit of cooler (53), cooling water pipe (33) is also in series with adjustment valve (42), cooling water pipe (33) internal recycle cooling water supply；The water return outlet of water tank (1) connects back to water pipe (34)；Connect with the filling pipe (35) being in series with water compensating valve (41) between water inlet pipe (31) and outlet pipe (32)；Pump group unit (2) includes water intaking valve (43), pump with mechanical seal group (21) and pump group water pipe (36), water intaking valve (43) and pump with mechanical seal group (21) are sequentially connected in series on pump group water pipe (36), and each pump group unit (2) is connected in parallel between outlet pipe (32) and return pipe (34) successively；It is provided with conductivity meter (61) and liquid level sensor (62) in water tank (1), between cooler (53) and pump group unit (2) of outlet pipe (32), is provided with temperature sensor (63) and pressure transducer (64)；Pump with mechanical seal group (21), water compensating valve (41), adjustment valve (42), water intaking valve (43), water pump (51), conductivity meter (61), liquid level sensor (62), temperature sensor (63) and pressure transducer (64) all connect controller (7) by holding wire, are provided with the higher limit H of water tank (1) water level in controller (7)MaxWith lower limit Hmin, water tank (1) inner storing water electrical conductivity higher limit GMaxWith lower limit Gmin, outlet pipe (32) interior water temperature higher limit TMaxWith lower limit Tmin, outlet pipe (32) interior hydraulic pressure higher limit PMaxWith lower limit Tmin。
- 2. technique pump group machine seal cooling water round-robin device as claimed in claim 1, is characterized in that:The submerged pump that frequency conversion motor drives selected by water pump (51), if the quantity of water pump (51) is more than being connected on outlet pipe (32) again after being connected in parallel composition water pump group between 1 Tai Shizegetai water pump (51), water pump (51) and cooler (53) are all fixed on the top board of water tank (1)；Water compensating valve (41) and water intaking valve (43) all select electromagnetic valve, regulate valve (42) and select pneumatic operated valve, and Y type selected by filter (52), and Programmable Logic Controller selected by controller (7).
- 3. the using method of technique pump group machine seal cooling water round-robin device as claimed in claim 1 or 2, is characterized in that: implement as follows:A. water tank moisturizing: if the water level that liquid level sensor (62) records in water tank (1) is down to lower limit HminTime, or, if the electrical conductivity that conductivity meter (61) records water tank (1) inner storing water rises to higher limit GMaxTime, controller (7) controls the water compensating valve (41) on water inlet pipe (31) and opens, by water inlet pipe (31) from moisturizing water source to water tank (1) moisturizing, until water level rises to higher limit HMaxAnd electrical conductivity is down to lower limit GminTime, controller (7) controls the water compensating valve (41) on water inlet pipe (31) and cuts out, and stops moisturizing；B. machine envelope cooling: interlocked control all implemented by pump with mechanical seal group (21) and water intaking valve (43), pump with mechanical seal group (21) and water pump (51), when pump with mechanical seal group (21) is run, controller (7) controls water intaking valve (43) unlatching, water pump (51) runs, when pump with mechanical seal group (21) is stopped transport, controller (7) controls water intaking valve (43) cut out, water pump (51) is stopped transport；When water pump (51) runs, water pump (51) transfers to each pump group unit (2) from the interior shedder seal cooling water of water tank (1) through outlet pipe (32) and implements cooling to each pump with mechanical seal group (21), outlet pipe (32) is provided with filter (52) to be implemented to filter to machine seal cooling water, if the quantity of water pump (51) is more than 1, and another 1 water pump (51) startup optimization immediately when 1 water pump (51) is stopped transport；The pump with mechanical seal group (21) of pump group unit (2) is implemented after cooling from return pipe (34) reflow tank (1) by machine seal cooling water；C. water temperature controls: machine seal cooling water temperature after the heat absorbing pump with mechanical seal group (21) rises, if the water temperature that temperature sensor (63) records in outlet pipe (32) rises to higher limit TMaxTime, controller (7) control and regulation valve (42) is opened, cooling water pipe (33) internal recycle cooling water supply, machine seal cooling water in outlet pipe (32) is implemented cooling by two groups of mutual heat exchanges of heat exchange unit by cooler (53), until water temperature is down to lower limit TminTime, controller (7) control and regulation valve (42) cuts out, and stops cooling；D. hydraulic pressure control: if the hydraulic pressure that pressure transducer (64) records in outlet pipe (32) is down to lower limit PminTime, controller (7) controls the water compensating valve (41) on filling pipe (35) and opens, the water at moisturizing water source is flowed directly to outlet pipe (32) from water inlet pipe (31) through filling pipe (35) and flow to pump group water pipe (36) again to pump with mechanical seal group (21) enforcement cooling, until hydraulic pressure rises to higher limit PMaxTime, controller (7) controls the water compensating valve (41) on filling pipe (35) and cuts out, and stops direct moisturizing.
- 4. the using method of technique pump group machine seal cooling water round-robin device as claimed in claim 3, is characterized in that:During step b, water pump (51) adopts VFC, and the hydraulic pressure value that the incoming frequency of water pump (51) records according to the pressure transducer (64) on outlet pipe (32) is implemented PID regulable control by controller (7)；During step c, the water temperature value that the aperture of adjustment valve (42) records according to the temperature sensor (63) on outlet pipe (32) is implemented PID regulable control by controller (7).
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| CN107787162A (en) * | 2016-08-31 | 2018-03-09 | 江苏海鼎电气科技有限公司 | Using the cooling back installation and its application method of pure water medium |
| CN110398116A (en) * | 2019-07-15 | 2019-11-01 | 世源科技工程有限公司 | A kind of equipment cooling water circulation system |
| CN110498533A (en) * | 2019-08-13 | 2019-11-26 | 济南瑞安源环境科技有限公司 | A kind of intelligent frequency-conversion cooling system |
| CN111431347A (en) * | 2020-02-20 | 2020-07-17 | 华电电力科学研究院有限公司 | Rotor cooling water system and start-stop control method thereof |
| CN112809554A (en) * | 2021-01-04 | 2021-05-18 | 郑州旭飞光电科技有限公司 | Water supply system and cooling system |
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| CN110498533A (en) * | 2019-08-13 | 2019-11-26 | 济南瑞安源环境科技有限公司 | A kind of intelligent frequency-conversion cooling system |
| CN111431347A (en) * | 2020-02-20 | 2020-07-17 | 华电电力科学研究院有限公司 | Rotor cooling water system and start-stop control method thereof |
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