JPH0572724B2 - - Google Patents

Description

[Detailed Description of the Invention] (1) Purpose of the Invention [Field of Industrial Application] The present invention is directed to measuring electrode water temperature in water resistors used in measurement tests of the output characteristics of various power supply devices including generators and inverters. Related to control system equipment.

[Prior Art] The novel water resistor A created by the inventor of the present application is the first
As shown in the figure, a predetermined amount of electrode water W is supplied in circulation.
a bottomed cylindrical base electrode 1 storing therein;
Drain holes 2 are provided at appropriate locations on the bottom 1a of the base electrode 1.
An insulating support 3 that has an opening and penetrates through the center.
A cylindrical main electrode 5 is installed vertically through the cylindrical main electrode 5, and the power cable 4 of the power supply device is connected to the lower end of the cylindrical main electrode 5. and an insulating sheath tube 7 which covers the water resistor A and opens a water outlet 6 for the cooled circulating supply water on the upper part, and there are two water resistors A, although there is only one in FIG.
More than one wire constitutes one set, and in the case of FIG. 5, there are three wires on the substrate S, and each main electrode 5 connects one phase of each of the two or three phases of the power supply device (not shown). On the other hand, the base electrodes 1 are connected to each other by a grounding cable 8 and grounded. Therefore, in the case of three phases, it becomes a Y-connected resistor. The drain hole 2 of the water outlet 6 circulates water to keep the water temperature cool and remove impurities.The inventor of the present invention has already created it in Japanese Patent Application No. 60-262532 and Japanese Patent Application No. 60-263875. It communicates with the electrode water cooling treatment device B shown in FIG.

However, even if the electrode water cooling treatment device B is provided and the concentration is kept constant, the conductivity of the electrode water W in the water resistor A increases as the temperature rises, accelerating power consumption. It also becomes smaller as the temperature decreases, reducing power consumption. For this reason, if left untreated, it will deviate from the determined value. When operating with constant power, it is necessary to keep the temperature of the electrode water constant in order to keep the resistance value constant.

[Problems to be Solved by the Invention] In the water resistor of the present invention, in order to fix the resistance value of the electrode water used as a resistor, the temperature of the electrode water is automatically controlled by the capacity of the electrode water cooling processing device. It is an object of the present invention to provide an electrode water temperature control system device in a water resistor that is effective and suitable for adjusting and maintaining a constant temperature.

(2) Structure of the Invention [Means for Solving the Problems] The electrode water temperature control system device in the water resistor of the present invention includes a spray pipe to which water is supplied by a motor-driven spray pump, and a rear part of the spray pipe. In a water resistor used for measurement tests of various power supply devices, electrode water is supplied and discharged through a cooling circulation pipe in which a radiator with a motor-driven fan arranged at the rear side is interposed. A side heater that measures the electrode water temperature flowing on the discharge side of the cooling circulation pipe and outputs a measured value signal, and inputs the measured value signal and outputs a comparison value control signal with a preset setting value. It is composed of a temperature comparator and a speed controller that inputs the comparison value control signal to control the motor drive, and adjusts the blowing cooling capacity of the fan and the injection cooling capacity of the spray pipe as necessary. It maintains an extremely stable resistance value.

[Example] An example of the present invention will be described with reference to FIG. The electrode water cooling treatment device B to which the present invention is applied cools the heated wastewater discharged from the water resistor A and sends it to the water resistor A again, and sprays water onto the radiator 9 and the radiator 9 from the rear surface. A fan 11 that blows air from behind between the spray pipe 10 and the sprayer, a louver 12 that guides the air emitted to the front of the radiator 9 by the fan 11 and disperses it into the upper space, and a sprayer disposed below the radiator 9. a collection tank 13 for collecting water that has been blown onto the radiator 9 from the pipe 10 and fallen; and the water resistor A.
The following pipe line is formed between the electrode water W circulating between the electrode water W and the radiator 9 and the storage tank 14 in which the electrode water W circulating between the electrode water W and the radiator 9 is stored in advance.

That is, the water stored in the storage tank 14 is transferred from the water supply pipe 15 vertically installed in the water to the pure water pump 16.
A pure water filling pipe 2 that pumps up water and passes through filters 17 and 18 and a water purifier 19 that is a water purifier that increases purity.
0, and a pump 2 with hot water interposed in the middle, which is supplied from the pure water filling pipe 20 to the supply side 22a, sent to the water resistor A, and discharged from the water resistor A.
1, the cooling circulation pipe 22 is sent to the lower inlet 9a of the radiator 9, and the electrode water W is branched out from the discharge side 22b of the cooling circulation pipe 22 in front of the lower inlet 9a of the radiator 9. pump 16
A flushing return pipe 24 returns the pure water to the pure water filling pipe 20 while being cooled through a cooling coil 23, and a water supply pipe 15 and a recovery water tank 13 are vertically installed in the storage tank 14 by means of an interposed spray pump 25. Switching valves 28, 29, which can freely switch between the spray water supply pipe 27 which draws up water from either one of the suction pipes 26 vertically installed therein and sends it to the spray pipe 10, are provided.
30.

31 in Figure 1 is a fan motor, 32, 33,
34 are a fan motor 31 and a pure water pump 1, respectively.
6. Speed controller using an inverter for the spray pump 25; 35 is a cooling coil.

Note that all of these devices, including the water resistor A, can be mounted on a loading platform such as a truck so that they can be moved quickly, or the storage tank 14 can be replaced with a pool.

C in the figure is an automatic control device for lifting and lowering the insulating sheath cylinder, and a measurement value signal is generated by measuring at least one of the power and current supplied to the power cable 4.
A measuring device 36 that outputs the measured value signal _S1 , a controller 37 that inputs the measured value signal _S1 and outputs a comparison value control signal _S2 with a preset setting value, and a controller 37 that outputs the comparison value control signal _S2 with a preset value. It is composed of an insulating sheath tube lifting drive operating device 38 that receives an input command and operates the lifting and lowering of the suspended insulating sheath tube 7.

That is, the insulating sheath tube lifting/lowering drive operating device 38' shown in _FIG . 41 and a drum 42 for winding and unwinding the winding material.

Insulating sheath tube lifting/lowering drive operating device 38″ shown in Fig. 3
A drive motor 43 controls rotation proportional to the input comparison value control signal _S2 , a pinion 45 fixed to the motor shaft 44, and a pinion 45 formed and extended at the upper part of the suspension rod 46 from which the insulating sheath tube 7 is suspended. It consists of a latch 47 that meshes with the latch 47.

The electrode water cooling processing device B configured as described above will be described.

First, as shown by the solid arrow in Figure 1, the water supply pipe 1
5 and the pure water filling pipe 20, the purified water is supplied to the supply side 22a of the cooling circulation pipe 22, and is filled into the water resistor A from the discharge port 6. That is, water sucked up by the pure water pump 16 from the storage tank 14 passes through the pure water pump 16, passes through the cooling coil 35, removes sand etc. with the filter 17, enters the filter 18, removes chlorine, and becomes pure water. Enter vessel 19. At this time, the conductivity of ordinary tap water is about 200 [μs/cm], but this is lowered to about 1 [μs/cm] using the water purifier 19. Water is filled into the water resistor A through the supply side 22a of the cooling circulation line 22 as shown by the solid arrow.

This completes the filling operation of the electrode water W, but if impurities are dissolved and the conductivity becomes high as a result of turning the electrode water pump 21, drain the water once and repeat the operation from the beginning.

Here, since the maximum operating temperature of the water purifier 19 is 40° C., the cooling coils 23 and 25 are used to cool the water to a temperature below this temperature.

Next, after closing the pure water filling pipe 20 with the switching valves 29 and 30, the electrode water pump 21 is operated to pump the filled electrode water W into the cooling circulation pipe 20 as shown by the dotted line arrow in FIG. circulate.

At the same time, the spray pump 25 is activated, and the water is sucked up from the storage tank 14 through the water supply pipe 15 as shown by the dotted line arrow in FIG. let Meanwhile, the fan motor 31 is also activated to turn the fan 11 and blow air from the back side of the radiator 9.

Therefore, while passing through the water resistor A, the electrode water W consumes power as a resistance, becomes hot water, and is heated to the radiator 9.
This hot water is cooled by sprayed water while passing through the radiator 9. On the other hand, the sprayed water absorbs the heat of the hot water passing through the radiator 9 on the surface of the radiator 9 and evaporates, and is sent out by the air blown from the back of the radiator 9 to the guide plate of the louver 12 arranged in front of the radiator 9. 12a, it blows up and diffuses above the electrode water cooling treatment device B as shown by the dotted arrow.
Thereafter, the electrode water W cooled by the radiator 9 is supplied to the water resistor A again through the supply side 22a of the cooling circulation pipe 22 from the spout 9b.

Water that is not completely evaporated by the water sprayed during cooling of the radiator 9 adheres to the louver 12 and falls under its own weight, so that it is collected in the collection tank 13. Therefore, when the recovery water tank 13 is close to its full water level, the switching valve 28 is switched to allow the water in the recovery tank 13 to be sucked up by the spray pump 25 through the suction pipe 26 and sent to the spray pipe 10.

Alternatively, the recovery water tank 13 and the storage tank 14 may be communicated with each other, and the suction pipe 26 and the switching valve 28 may be omitted.

If you want to lower the conductivity of the electrode water W during operation at high pressure, switch the switching valves 29 and 30 and transfer the water to the flushing return pipe 24 and the pure water filling pipe as shown by the two-dot chain arrow in Fig. 1. 20 and cooling circulation pipe 22. That is, the electrode water W is discharged from the water resistor A by the electrode water pump 21, passes through the cooling coil 23, is sent to the cooling coil 35 by the pure water pump 16, and further passes through the filters 17, 18 and the deionizer 19. Since the water returns to the water resistor A again, foreign matter, salts, etc. are removed, and the conductivity can be lowered.

Conversely, in low-voltage, high-current operation, if a conductive substance such as salt is added to the electrode water W of the water resistor A to raise the conductivity to 200 [μs/cm] higher than that of tap water, and the water is circulated through the cooling circulation pipe 22. good.

However, the electrode water temperature control system device D of the present invention
is arranged at the lower inlet 9a of the radiator 9 connected to the discharge side 22b end of the cooling circulation pipe 22, and measures the temperature of the electrode water W flowing through the discharge side 22b of the cooling circulation pipe 22 and outputs a measurement value signal _S3 . A comparison value control signal S 4 between the side warmer 48 and a set value that is preset by inputting the measured value signal S ₃ and _{a high temperature side allowable range value that the comparison value control signal S 4 is} preset. A temperature comparator ₄₉ outputs an emergency signal _S5 when the temperature exceeds the temperature, and a spray pump 2
It is composed of speed controllers 32 and 34 consisting of inverters that respectively control and operate the motor drive of the motor 5 and the drive of the motor 31 of the fan 11, and an insulating sheath cylinder lifting drive that cuts off the connection when the emergency signal _S5 is input as an incidental device. Electromagnetic clutches 50, 51 connected to motor shafts 40, 44 of devices 38', 38''
In parallel with this, an alarm 52 that sounds an alarm when the emergency signal _S5 is input, and a safety circuit breaker 53 that intervenes in the power cable 4 and trips the power supply device and water resistor A are provided.

[Operation] Since the present invention is configured as described above, prior to the operation of the present invention, a power supply device (not shown) is started, and input power is supplied to the main electrode 5 via the power cable 4 to operate the water resistor A and to The water pump 21 is started and the electrode water W is cooled on the discharge side 22 of the circulation pipe 22.
b, passes through the radiator 9 on the way and circulates to the supply side 22a.

With reference to FIG. 1 and FIG. 4, the device D of the present invention
The operation of the equipment and the accompanying equipment will be explained.

First, the proportional band control operation of the fan 11, which is a blower, causes the electrode water W heated in the base electrode 1 to pass through the discharge side 22b of the cooling circulation pipe 22 from the drain hole 2 and reach the lower inlet 9a of the radiator 9. Then, the water temperature is sequentially measured and detected by the temperature measuring device 48, and a measurement value signal is generated.
_S3 continues to be sent to the temperature comparator 49, where the temperature comparator 49 performs a comparison operation or calibration between the preset target value and the measured value signal _S3 , and calculates the difference value of the subtraction result or the division result. Ratio value comparison value control signal S ₄
is transmitted to the speed controller 32. The speed controller 32 supplies an alternating current proportional to the comparison value control signal _S4 , measures the increase or decrease in the rotational speed of the motor 31, and integrally rotates the fan 11.

That is, in the fan 11, the comparison value control signal _S4 is, for example, −
It is designed to stop at 5℃ and go to full speed at +5℃,
During this time, the cooling capacity is adjusted by adjusting the air flow rate using proportional control, and the temperature of the electrode water W is kept constant.

Next, the spray injection control operation of the spray pipe 10 is performed by transmitting a comparison value control signal S ₄ outputted from the temperature comparator 49 to the speed controller 34 as in the case of the fan 11 . The speed controller 34 supplies an alternating current proportional to the comparison value control signal _S4 to the spray pump 2.
The amount of water sprayed from the spray pipe 10 through the spray water supply line 27 is controlled by controlling the rotational speed of the motor 5 (not shown) to drive the spray pump 25 and adjust the amount of water supplied.

In other words, the spray from the spray pipe 10 will be injected if the comparison value control signal _S4 shows a value of 70-50=20, for example, if the set value is 70°C and the spray injection start temperature is 50°C. The amount of water will increase as the temperature rises. It is designed to stop spraying when the temperature is below a certain level, for example below 50°C, where the comparison value signal _S4 indicates 20, to prevent overcooling and to save water.

Furthermore, the operation of the accessory device is determined by the temperature comparator 49, in which the measured value signal _S3 from the thermometer 48 exceeds a preset high temperature tolerance range, for example 80°C, and the comparison difference value is 0 or negative. becomes 1 or less, an emergency signal _S5 is sent to an alarm device 52 such as a buzzer or bell, or a safety circuit breaker 5 such as a fuse inserted into the power cable 4 between the water resistor A and the power supply device (not shown).
3 and the electromagnetic clutches 50 and 51 of the insulating sheath cylinder lifting and lowering operation devices 38' and 38'', the alarm 52 is sounded to notify the work monitoring personnel, and the safety circuit breaker 53 is shut off to prevent water resistance. The operation of the device A is stopped, the electromagnetic clutches 50 and 51 are disconnected, the drum 42 and the pinion 45 are released into an unrestrained free-wheeling state, and the insulating sheath tube 7 suddenly descends due to its own weight, completely concealing the main electrode 5. to stop arc discharge or prevent its occurrence.

(3) Effects of the Invention Thus, according to the present invention, the water temperature of the electrode of the water resistor is measured and detected by the temperature measuring device, and the blowing capacity of the fan and the spraying capacity of the spray pipe are adjusted in coordination through the temperature comparator. Since it is now possible to automatically control the electrode water temperature at a constant temperature, there is no longer a need for constant monitoring staff to measure the electrode water temperature and manually vary the speed controller each time, making continuous day and night operation possible. In addition, the ability to follow fluctuations in water temperature is fast, minimizing the occurrence of arc α discharge due to dielectric breakdown, improving safety and reliability, and providing excellent security.In addition, water resistors can be used to measure the output characteristics of various power supply devices. is extremely stable, high fidelity, high precision,
It has excellent effects such as obtaining high reliability.

[Brief explanation of the drawing]

Fig. 1 is a conceptual diagram showing an example of application of the present invention device to an electrode water cooling processing device for a water resistor, and Figs. 2 and 3 show application of ancillary devices of the present invention device to an insulating sheath cylinder lifting drive operating device. Fig. 4 is a correlation characteristic diagram of the electrode water temperature of fan rotation and spray tube injection and each control output, and Fig. 5 is an enlarged plan view of three base electrodes in a water resistor assembled into a set. be. A... Water resistor, B... Electrode water cooling treatment device,
C...Insulating sheath cylinder lifting/lowering automatic control device, D...Electrode water temperature control system device, _S1 , _S3 ...Measurement value signal,
S ₂ , S ₄ ... Comparison value control signal, S ₅ ... Emergency emergency signal, W ... Electrode water, 1 ... Base electrode, 2 ... Drain hole, 3 ... Insulating support, 4 ... Power cable ,
5... Main electrode, 6... Outlet, 7... Insulating sheath tube,
9...Radiator, 9a...Lower injection port, 10...
...Spray pipe, 11...Fan, 22...Cooling circulation pipe, 22a...Supply side, 22b...Discharge side,
25... Spray pump, 31... Fan motor, 32, 33, 34... Speed controller, 38, 3
8', 38''...Insulating sheath tube lifting/lowering drive operating device, 48
...Temperature meter, 49...Temperature comparator, 50,51...
...Electromagnetic clutch, 52...Alarm, 53...Safety circuit breaker.

Claims (1)

[Claims] 1. A cooling circulation pipe in which a radiator is interposed in the middle, which has a spray pipe that is supplied with water by a motor-driven spray pump, and a motor-driven fan placed behind the spray pipe, and a filter and Electrode water is supplied and discharged through a deionized water filling pipe with a deionizer interposed in the middle and flowing through it when necessary.When performing a high voltage and small current test, the electrode water is passed through the deionized water filling pipe and passes through the filter and the deionized water. The output of various power supply devices operated by lowering the conductivity of the electrode water and adding salts etc. to the electrode water to increase the conductivity of the electrode water when performing low voltage and large current tests. A water resistor used in a characteristic measurement test includes a temperature meter that measures the electrode water temperature flowing in the cooling circulation pipe on the discharge side of the water resistor and outputs a measured value signal, and a temperature meter that outputs a measured value signal. A temperature comparator that outputs a comparison value control signal that is input and compared with a preset measured value, and a speed that controls and operates the motor drive of the spray pump and the radiator fan, respectively, by inputting the comparison value control signal. It consists of a controller,
An electrode water temperature control system device for a water resistor, wherein the injection amount of the spray pipe and the cooling air volume of the fan are configured to be able to freely coordinately control the spray amount of the spray tube and the cooling air volume of the fan in accordance with fluctuations in the water temperature of the discharge electrode of the water resistor.