CN209279395U - A kind of cooling medium feedway - Google Patents
A kind of cooling medium feedway Download PDFInfo
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- CN209279395U CN209279395U CN201821772379.8U CN201821772379U CN209279395U CN 209279395 U CN209279395 U CN 209279395U CN 201821772379 U CN201821772379 U CN 201821772379U CN 209279395 U CN209279395 U CN 209279395U
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- solenoid valve
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Abstract
The utility model relates to a kind of cooling medium feedways.The cooling medium feedway, water supply tank, circulating pump, pipeline heater and test sample including passing sequentially through pipeline connection, ratio triple valve is equipped between pipeline heater and test sample, the one outlet of ratio triple valve connects Mass Flow Meter, another outlet connection small-range flowmeter and coaxial pipe heater, realize the big flow of test sample cooling medium and the accurate supply of small flow；Ensure small flow status simultaneously, the guarantee of the stabilization and medium temperature of small flow may be implemented waste heat using the cooperation of bypass flow and coaxial pipe heater and recycle.Plate heat exchanger is equipped between pipeline heater and ratio triple valve, the cold side heat exchange pipeline in plate heat exchanger is connected to external cooling pipe, while being equipped with temperature sensor in the water inlet of test sample, realizes being precisely controlled for coolant temperature.
Description
Technical field
The present invention relates to auto parts and components performance test fields, more particularly, to a kind of cooling medium feedway.
Background technique
At present the cooling medium feedway in auto parts and components performance test mainly use heater to medium into
Row heating, utilizes circulating pump and threeway valve regulation rate-of flow.Between the minimum frequency of operation of circulating pump and the heat of system pipeline
Radiation, heat conduction loss cannot achieve pipe end constant temperature, the accurate of constant flow cooling medium stablizes supply.Especially flow
Cooling medium less than 32L/h, temperature higher than 60 DEG C is supplied.
Summary of the invention
In order to solve the above problem, the present invention provides a kind of cooling medium feedway, when being able to achieve big flow and small flow
The lean supply of cooling medium constant temperature, constant flow.
The technical solution adopted by the present invention is that: a kind of cooling medium feedway, the benefit including passing sequentially through pipeline connection
Water tank, circulating pump, pipeline heater and test sample, it is characterised in that: the water outlet and test sample of the pipeline heater
Water inlet between be equipped with ratio triple valve, the water inlet of the ratio triple valve and the hot side pipe water outlet of pipeline heater
It is connected, one of water outlet of the ratio triple valve is divided into two-way after Mass Flow Meter, passes through third electricity all the way
Magnet valve is connected with the water inlet of test sample, after another way is connected to coaxial pipe heater external pipe, passes through the 5th solenoid valve
It is connected with the 6th solenoid valve with circulating pump water inlet；Another water outlet of the ratio triple valve by small-range flowmeter with
After coaxitron heater body pipeline, it is connected by the 4th solenoid valve with the water inlet of test sample；The test sample goes out
The mouth of a river is connected by the 6th solenoid valve with circulating pump water inlet.
Preferably, being equipped with plate heat exchanger, the plate heat exchanger between the pipeline heater and ratio triple valve
Cold side ducts be connected to external cooling pipe, the external cooling pipe, which is equipped with, cools down solenoid valve.
Further, second solenoid valve, second electromagnetism are equipped at the hot side pipe water outlet of the plate heat exchanger
Be equipped with emptying pipeline with external compression air communication between valve and ratio triple valve, the emptying pipeline be equipped with hand-operated valve with
Emptying solenoid valve.
Further, the water outlet of the test sample flows back into water supply tank by the 7th solenoid valve.
Further, the water supply tank water outlet is equipped with the first solenoid valve.
Further, the water inlet of the test sample is equipped with pressure sensor and temperature sensor.
Further, first solenoid valve, second solenoid valve, third solenoid valve, the 4th solenoid valve, the 5th electromagnetism
It is valve, the 6th solenoid valve, the 7th solenoid valve, ratio triple valve valve, emptying solenoid valve, cooling solenoid valve, small-range flowmeter, a large amount of
Range of flow meter, pressure sensor, temperature sensor, circulating pump and pipeline heater are automatically controlled by controller.
A kind of control method of cooling medium feedway: the following steps are included:
A, the first solenoid valve is opened, circulating pump and pipeline heater work, and the cooling medium in water supply tank enters pipeline
It in heater and plate heat exchanger hot side duct, is controlled through excess temperature, reaches the temperature of setting；
B, the valve port opening of ratio triple valve, the uninterrupted of the cooling medium of control supply test prototype are controlled；
When setting flow lower than switching value (32L/h), third solenoid valve is closed, and the 4th solenoid valve and the 5th solenoid valve are beaten
It opens, adjusts the working frequency of ratio threeway valve opening and circulating pump, the cooling medium for flowing through small-range flowmeter reaches setting
Value, enters test sample by the coaxial inner tube layer of coaxial pipe heater afterwards；Extra cooling medium passes through ratio triple valve
Another outlet carries out secondary liter through the cooling medium of small-range flowmeter by the coaxial outer tube layer convection current of coaxial pipe heater
Temperature has the function that thermal loss compensates, returns to the entrance of circulating pump by the 5th solenoid valve and the 6th solenoid valve later；
When flow is higher than switching value (32L/h), the 4th solenoid valve and the 5th solenoid valve are closed, and third solenoid valve is opened,
The working frequency of ratio threeway valve opening and circulating pump is adjusted at this time, and the cooling medium for flowing through Mass Flow Meter reaches setting
Value enters test sample by third solenoid valve afterwards；
C, after the completion of test, firstly, pipeline heater stops working, cooling solenoid valve is opened, when cooling medium in system
When temperature is down to safe temperature (60 DEG C) below, circulation pump, second solenoid valve and the 6th solenoid valve are closed；Secondly, opening
Emptying solenoid valve, the 5th solenoid valve and the 7th solenoid valve close third solenoid valve and the 4th solenoid valve, adjust ratio triple valve,
Compressed air enters the coaxial outer tube layer of Mass Flow Meter and coaxial pipe heater, heats to Mass Flow Meter and coaxitron
The coaxial outer tube layer of device carries out purging emptying；Then, the 5th solenoid valve is closed, third solenoid valve and the 4th solenoid valve are opened, is adjusted
Section ratio triple valve, to Mass Flow Meter, small-range flowmeter, the coaxial inner tube layer of coaxial pipe heater and test prototype into
Row purging emptying.
Preferably, equipment will when the liquid level upper limit position switch H1 or liquid level lower limit position H2 on the water supply tank are triggered
It stops working and shows corresponding warning message.
Preferably, the temperature sensor temperature of the pipeline heater water outlet, which is higher than its safe temperature, sets limit value
When (180 DEG C), pipeline heater stops working, circulating pump forced service in bypass state, second solenoid valve, the 5th solenoid valve,
6th solenoid valve and cooling solenoid valve are opened, and emptying solenoid valve, third solenoid valve, the 4th solenoid valve and the 7th solenoid valve are closed,
Ratio triple valve works in big flow state.
The beneficial effect that the present invention obtains is: ratio triple valve, ratio are equipped between pipeline heater and test sample
The one outlet of triple valve connects Mass Flow Meter, another outlet connection small-range flowmeter and coaxial pipe heater, real
The big flow of existing test sample cooling medium and the accurate supply of small flow；Ensure small flow status, the stabilization of small flow simultaneously
With the guarantee of medium temperature, waste heat may be implemented using the cooperation of bypass flow and coaxial pipe heater and recycle.Pipeline heater
Plate heat exchanger is equipped between ratio triple valve, the cold side ducts of plate heat exchanger are connected to external cooling pipe, while
The water inlet of test sample is equipped with temperature sensor, realizes being precisely controlled for coolant temperature.The apparatus structure is simple, can
To improve equipment heating efficiency, power consumption is reduced, while the stability of supplying media physical parameter can also be improved.
Multiple protective is set, it can be to avoid equipment fault caused by pipeline heater dry combustion method etc..Pass through PID in device work
Circulating pump operating point and pipeline heater power are adjusted, realizes cost-saving synergistic.Shutdown temperature is provided with simultaneously to protect, it can be effective
Avoid personal injury caused by revealing because of cooling medium.It is equipped between second solenoid valve and ratio triple valve and external compression sky
The emptying pipeline of gas connection, the cooling medium in pipeline and test sample can be recycled, to avoid environmental pollution and reduction
The loss of cooling medium.
Detailed description of the invention
Fig. 1 is operation logic figure of the invention.
Specific embodiment
The present invention will be further explained in the following with reference to the drawings and specific embodiments.
As shown in Figure 1, a kind of cooling medium feedway, including water supply tank 1, circulating pump 3, pipeline heater 4 and test
Exemplar 9, water supply tank 1, circulating pump 3, pipeline heater 4 pass sequentially through pipeline with test sample 9 and connect, the cooling in water supply tank 1
Medium is pumped in pipeline heater 4 by circulating pump 3, in pipeline heater 4 after heated for controlling temperature to required temperature, is transported to
In test sample 9.The water outlet of water supply tank 1 is equipped with the first solenoid valve 21.
Ratio triple valve 20, pipeline heater 4 and ratio triple valve are equipped between pipeline heater 4 and test sample 9
20 are additionally provided with plate heat exchanger 5, and by the collective effect of pipeline heater 4 and plate heat exchanger 5, cooling medium temperature may be implemented
Degree is precisely controlled.The hot side duct water outlet of plate heat exchanger 5 is equipped with second solenoid valve 22.
One water inlet of ratio triple valve 20 and the aperture of two water outlets can be adjusted individually, ratio triple valve 20
Water inlet be connected with the water outlet of pipeline heater 4.One of water outlet of ratio triple valve 20 passes through a large amount of range of flow
It is divided into two-way after meter 7 (using electromagnetic flowmeter), is connected all the way by third solenoid valve 23 with the water inlet of test sample 9, is used
In to the stable cooling medium under the offer big flow state of test sample 9；Another way connects with coaxial 8 external pipe of pipe heater
After logical, it is connected by the 5th solenoid valve 25 and the 6th solenoid valve 26 with 3 water inlet of circulating pump.
Another water outlet of ratio triple valve 20 by small-range flowmeter 6 (use coriolis flowmeter) with it is coaxial
After 8 internal pipeline of pipe heater, it is connected by the 4th solenoid valve 24 with the water inlet of test sample 9, for being mentioned to test sample 9
For the stable cooling medium under small flow status.Under small flow status, from the cooling of 20 water inlet of ratio triple valve entrance
Medium, a part flows through small-range flowmeter by the one outlet of ratio triple valve 20, for providing small stream to test sample 9
Stable cooling medium under amount state；Extra another part cooling medium passes through another outlet stream of ratio triple valve 20
Enter the coaxial outer tube layer of coaxial pipe heater 8, cooling medium carries out between the coaxial outer tube layer and internal layer of coaxial pipe heater 8
Heat exchange carries out secondary temperature elevation to the cooling medium for flowing through small-range flowmeter, has the function that thermal loss compensates.
The water outlet of test sample passes through the 6th solenoid valve 26 all the way and is connected with 3 water inlet of circulating pump, forms circulation loop；
The water outlet another way of test sample flows back into water supply tank 1 by the 7th solenoid valve 27, forms aerial drainage circuit, after the completion of test,
Cooling medium in pipeline, corresponding component and test prototype 9 is flowed back into water supply tank 1, the loss of cooling medium is reduced.
The cooling water inlet SP2 of cold side ducts and external cooling pipe (cooling water for providing 7 DEG C) in plate heat exchanger 5
It is connected to cooling water outlet SP3, external cooling pipe is equipped with cooling solenoid valve 28；When the temperature of cooling medium in circulation loop
When more than setting value, cooling solenoid valve 28 is opened, and cooling water enters in plate heat exchanger 5, with the cooling for flowing through plate heat exchanger 5
Medium carries out heat exchange, carries out low temp compensating to cooling medium, realizes the accurate control of temperature.
The water inlet of test sample 9 is equipped with pressure sensor P and temperature sensor T, the water outlet of pipeline heater 4
It also is provided with temperature sensor T.
The emptying pipeline with external compression air communication, evacuated tube are equipped between second solenoid valve 22 and ratio triple valve 20
Road is equipped with hand-operated valve 11 and emptying solenoid valve 29.
First solenoid valve 21, second solenoid valve 22, third solenoid valve 23, the 4th solenoid valve 24, the 5th solenoid valve the 25, the 6th
Solenoid valve 26, the 7th solenoid valve 27, ratio triple valve valve 20, emptying solenoid valve 29, cooling solenoid valve 28, small-range flowmeter 6,
Mass Flow Meter 7, pressure sensor P, temperature sensor T, circulating pump 3 and pipeline heater 4 are controlled by controller automatically
System realizes the automatic control of whole device, guarantees the flow for the cooling medium that test prototype 9 supplies and the stabilization of temperature.
Cooling solenoid valve 28 is under the control of controller 10, according to the water inlet of circulating pump 3 working frequency and test sample 9
The value of feedback for locating temperature sensor T controls cooling solenoid valve 28 by PWM mode and realizes the quickly cooling work to cooling medium
Make.Controller is after receiving stopping signal, if temperature sensor T value of feedback is higher than safe temperature (60 DEG C), cooling electricity
Magnet valve 28 will be normally opened, circulating pump 3 remain stationary state operation, until temperature sensor T value of feedback be lower than safe temperature (60 DEG C).
A kind of control method of cooling medium feedway of the invention: the following steps are included:
A, after getting well piping connection, the first solenoid valve 21 is opened, unlatching circulating pump 3 and pipeline heater 4, in water supply tank 1
Cooling medium pumped in pipeline heater 4 and heated by circulating pump 3, carried out through pipeline heater 4 and plate heat exchanger 5
Temperature control, reaches the set temperature range of cooling medium required for test sample 9；
B, according to different test modes (big flow state and small flow status), ratio threeway is controlled by controller 10
The valve port opening of valve 20, the uninterrupted of the cooling medium of control supply test prototype 9；
Under small flow status, when flow is lower than preset value (32L/h), third solenoid valve 23 is closed, 24 He of the 4th solenoid valve
5th solenoid valve 25 is opened, and 20 aperture of ratio triple valve is adjusted, and the cooling medium for flowing through small-range flowmeter 6 reaches setting value
After the stabilization of flow (guarantee), equilibrium temperature, the cooling medium of regime flow by the coaxial inner tube layer of coaxial pipe heater 8 into
Enter test sample 9；Extra cooling medium passes through the coaxial of coaxial pipe heater 8 by another outlet of ratio triple valve 20
Outer tube layer carries out secondary temperature elevation to the cooling medium for flowing through small-range flowmeter 6, has the function that thermal loss compensates, Zhi Houtong
It crosses the 5th solenoid valve 25 and the 6th solenoid valve 26 returns to the entrance of circulating pump 3；
Under big flow state, when flow is higher than preset value (32L/h), the 4th solenoid valve 24 and the 5th solenoid valve 25 are closed,
Third solenoid valve 23 is opened, and adjusts 20 aperture of ratio triple valve at this time, the cooling medium for flowing through Mass Flow Meter 7, which reaches, to be set
After definite value (stabilization for guaranteeing flow), equilibrium temperature, the cooling medium of regime flow enter test specimens by third solenoid valve 23
Part 9；
C, after the completion of test, firstly, pipeline heater 4 is closed, cooling solenoid valve 28 is opened, when cooling medium temperature in system
When degree is down to safe temperature (60 DEG C) below, circulating pump 3 is closed, and then second solenoid valve 22 and the 6th solenoid valve 26 are closed；Its
Secondary, emptying solenoid valve 29, the 5th solenoid valve 25 and the 7th solenoid valve 27 close third solenoid valve 23 and the 4th solenoid valve 24, adjust
Section ratio triple valve 20, external compression air enters the coaxial outer tube layer of Mass Flow Meter 7 and coaxial pipe heater 8, to big
The coaxial outer tube layer of range flow meter 7 and coaxial pipe heater 8 carries out purging emptying, Mass Flow Meter 7 and coaxitron heating
Cooling medium in the coaxial outer tube layer of device 8 is flowed into water supply tank 1, which persistently carries out 1 minute；Then, the 5th is closed
Solenoid valve 25 opens third solenoid valve 23 and the 4th solenoid valve 24, ratio triple valve is adjusted, to Mass Flow Meter 7, small-range
Flowmeter 6, the coaxial inner tube layer of coaxial pipe heater 8 and test prototype 9 carry out purging emptying, Mass Flow Meter 7, small-range
Flowmeter 6, coaxial pipe heater 8 coaxial inner tube layer and test prototype 9 in cooling medium flow into in water supply tank 1, the mistake
It Cheng Jinhang interval 30 seconds 30 seconds, is repeated 3 times.
In the present embodiment, hand-operated valve 11 is served only for use when system testing and device maintenance.
In the present embodiment, water supply tank 1 is equipped with liquid level upper limit position switch H1 and liquid level lower limit bit switch H2, when water supply tank 1
On liquid level upper limit position switch H1 or liquid level lower limit switch position H2 triggering when, device will stop working and show corresponding alarm signal
Breath.When the temperature sensor T of 4 water outlet of pipeline heater is higher than its safe temperature limit value, pipeline heater 4 stops working,
3 forced service of circulating pump is in bypass state, second solenoid valve 22, the 5th solenoid valve 25, the 6th solenoid valve 26 and cooling solenoid valve
28 open, and emptying solenoid valve 29, third solenoid valve 23, the 4th solenoid valve 24 and the 7th solenoid valve 27 are closed, ratio triple valve 20
Work in big flow state.
Basic principle and key structural feature of the invention has been shown and described above.The present invention is not by the limit of examples detailed above
System, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It both falls in the range of claimed invention.The claimed scope of the invention is by appended claims and its equivalent
It defines.
Claims (7)
1. a kind of cooling medium feedway, water supply tank (1), circulating pump (3), the pipeline heating including passing sequentially through pipeline connection
Device (4) and test sample (9), it is characterised in that: the water outlet of the pipeline heater (4) and the water inlet of test sample (9)
Between be equipped with ratio triple valve (20), the water inlet of the ratio triple valve (20) is connected with the water outlet of pipeline heater (4),
One of water outlet of the ratio triple valve (20) is divided into two-way after Mass Flow Meter (7), passes through third all the way
Solenoid valve (23) is connected with the water inlet of test sample (9), after another way is connected to coaxial pipe heater (8) external pipe, leads to
It crosses the 5th solenoid valve (25) and the 6th solenoid valve (26) is connected with circulating pump (3) water inlet；The ratio triple valve (20) it is another
One water outlet by small-range flowmeter (6) with after coaxial pipe heater (8) internal pipeline, by the 4th solenoid valve (24) with
The water inlet of test sample (9) is connected；The water outlet of the test sample (9) is by the 6th solenoid valve (26) and circulating pump (3)
Water inlet is connected.
2. cooling medium feedway according to claim 1, it is characterised in that: the pipeline heater (4) and ratio
Plate heat exchanger (5) are equipped between triple valve (20), the cold side ducts of the plate heat exchanger (5) and external cooling pipe connect
Logical, the external cooling pipe is equipped with cooling solenoid valve (28).
3. cooling medium feedway according to claim 2, it is characterised in that: the hot side of the plate heat exchanger (5)
At pipe water outlet be equipped with second solenoid valve (22), between the second solenoid valve (22) and ratio triple valve (20) equipped with it is outer
The emptying pipeline of portion's compressed air communication, the emptying pipeline are equipped with hand-operated valve (11) and emptying solenoid valve (29).
4. cooling medium feedway according to claim 3, it is characterised in that: the water outlet of the test sample (9)
Water supply tank (1) is flowed back by the 7th solenoid valve (27).
5. cooling medium feedway according to claim 4, it is characterised in that: water supply tank (1) water outlet is equipped with
First solenoid valve (21).
6. cooling medium feedway according to claim 5, it is characterised in that: the water inlet of the test sample (9)
Place is equipped with pressure sensor and temperature sensor.
7. cooling medium feedway according to claim 5, it is characterised in that: first solenoid valve (21), second
Solenoid valve (22), third solenoid valve (23), the 4th solenoid valve (24), the 5th solenoid valve (25), the 6th solenoid valve (26), the 7th electricity
Magnet valve (27), ratio triple valve (20), emptying solenoid valve (29), cooling solenoid valve (28), small-range flowmeter (6), wide range
Flowmeter (7), pressure sensor, temperature sensor, circulating pump and pipeline heater (4) are controlled by controller (10) automatically
System.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821772379.8U CN209279395U (en) | 2018-10-30 | 2018-10-30 | A kind of cooling medium feedway |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821772379.8U CN209279395U (en) | 2018-10-30 | 2018-10-30 | A kind of cooling medium feedway |
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| Publication Number | Publication Date |
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| CN209279395U true CN209279395U (en) | 2019-08-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109186091A (en) * | 2018-10-30 | 2019-01-11 | 东风马勒热系统有限公司 | A kind of cooling medium feedway and control method |
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2018
- 2018-10-30 CN CN201821772379.8U patent/CN209279395U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109186091A (en) * | 2018-10-30 | 2019-01-11 | 东风马勒热系统有限公司 | A kind of cooling medium feedway and control method |
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