CN107702904B - Converter valve cooling system cold and hot alternation testing device and method - Google Patents
Converter valve cooling system cold and hot alternation testing device and method Download PDFInfo
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- CN107702904B CN107702904B CN201710853546.5A CN201710853546A CN107702904B CN 107702904 B CN107702904 B CN 107702904B CN 201710853546 A CN201710853546 A CN 201710853546A CN 107702904 B CN107702904 B CN 107702904B
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
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Abstract
The invention discloses a cold and hot alternation testing device and method for a converter valve cooling system, and belongs to the field of converter valve cooling systems. The device comprises a water supply system, a main circulation system and an air compressor, wherein the water supply system comprises a hot water tank and a cold water tank which are connected in parallel, and water outlets of the hot water tank and the cold water tank are respectively connected to a water inlet of the main circulation system through a water replenishing pump and an electric valve; the main circulating system comprises a main circulating pump, a main filter, a third electric valve, a fourth electric valve and a degassing buffer tank which are sequentially connected through pipelines, and a converter valve to be tested is connected between a water outlet of the third electric valve and a water inlet of the fourth electric valve; the air outlet of the air compressor is connected to the water outlet of the third electric valve through a first electromagnetic valve and is connected to the air inlet of the degassing buffer tank through a first check valve; the outlet of the main filter is respectively connected to the water inlets of the hot water tank and the cold water tank through electric valves. The invention has the advantages of simple structure, high automation degree, safety, reliability and high operation efficiency.
Description
Technical Field
The invention relates to the field of converter valve cooling systems, in particular to a cold-hot alternation testing device and method for a converter valve cooling system.
Background
The extra-high voltage converter valve is used as a core device of extra-high voltage power transmission and is a key unit for alternating current-direct current electric energy conversion. The converter valve can generate a large amount of heat in the process of converting Alternating Current (AC) power into Direct Current (DC) power due to high working voltage level and high transmission power. Therefore, a closed pure water cooling system is required to dissipate heat of the converter valve. The radiator, the water resistor and the saturable reactor in the converter valve sub-valve module are sequentially connected by PVDF pipes with certain pipe diameters, deionized pure water flows in a pipeline connected with the PVDF pipes, heat is continuously taken out of the room from the radiator of the valve module, and the valve module is guaranteed to work at a proper temperature. In the operation process of the converter valve closed pure water cooling system, the leakage of the cooling medium can cause the conduction and the discharge between the internal devices of the valve module, even cause the conditions of the burning of the converter valve module, the shutdown of the whole system and the like. Therefore, the devices such as the pipeline for carrying the circulating cooling medium, the water cooling plate and the water resistor must be strictly checked before the factory shipment.
In the prior art, a test platform for testing a converter valve cooling system needs to manually adjust parameters such as flow velocity, pressure and temperature of cooling media in tested components, the number of the tested components is small, the operation procedure is complex, the disassembly and the assembly are troublesome, multiple persons are needed for cooperation, the working efficiency is low, and delivery tests cannot be performed on pipelines with large pipe diameters due to the operation capacity and the like.
Disclosure of Invention
The invention aims to solve the technical problem of providing an intelligent and reliable cold and hot alternation testing device and method for a converter valve cooling system, which can automatically adjust parameters such as flow velocity, pressure and the like of a cooling medium in a tested component when a converter valve is tested before leaving a factory, and has the advantages of simple structure and high operation efficiency.
In order to solve the technical problems, the invention provides the following technical scheme:
the utility model provides a cold and hot testing arrangement in turn of converter valve cooling system, includes water supply system, main circulation system and air compressor machine, wherein:
the water supply system comprises a hot water tank and a cold water tank which are connected in parallel, and water outlets of the hot water tank and the cold water tank are connected to a water inlet of the main circulating system through a first water replenishing pump, a first electric valve, a second water replenishing pump and a second electric valve respectively;
the main circulating system comprises a main circulating pump, a main filter, a third electric valve, a fourth electric valve and a degassing buffer tank which are sequentially connected by pipelines, a water inlet of the main circulating pump is connected with water outlets of the hot water tank, the cold water tank and the degassing buffer tank, and a converter valve to be tested is connected between a water outlet of the third electric valve and a water inlet of the fourth electric valve;
the main circulating pump is connected in parallel with an electric regulating valve for regulating the flow of the main circulating system;
the air outlet of the air compressor is connected to the water outlet of the third electric valve through a first electromagnetic valve and is connected to the air inlet of the degassing buffer tank through a first check valve;
the outlet of the main filter is respectively connected to the water inlets of the hot water tank and the cold water tank through a fifth electric valve and a sixth electric valve;
the water inlet of the main circulating pump, the water outlet of the third electric valve and the water inlet of the fourth electric valve are respectively provided with a pressure transmitter, the water outlet of the main filter and the water inlet of the degassing buffer tank are respectively provided with a temperature transmitter, and the water outlet of the main filter is also provided with a flow transmitter.
Furthermore, the air compressor machine is the super-silent air compressor machine, the gas outlet of air compressor machine still is connected with squirt and/or buffering expansion tank, the delivery port of buffering expansion tank is connected to the water inlet of main circulating pump.
Further, an air storage tank, a first auxiliary filter, an oil removing filter and a pressure reduction regulating valve are further connected in series between the air compressor and the third electric valve, and between the water gun and/or the buffer expansion tank.
Further, the main circulating pump is two variable frequency pumps with different flow rates, the two main circulating pumps are connected in parallel, a water inlet of each main circulating pump is connected with a butterfly valve, and a water outlet of each main circulating pump is connected with a second check valve.
Furthermore, at least two second electromagnetic valves and a seventh electric valve which are connected in parallel and have different flow rates are arranged between the water outlet of the main filter and the water inlet of the third electric valve, and the second electromagnetic valves and the seventh electric valve are respectively connected in series with the flow transmitter.
Further, a heater is arranged in the hot water tank, a heat exchanger is arranged in the cold water tank, and the heat exchanger is connected with a cold water machine.
Furthermore, the water inlet of the hot water tank and the water inlet of the cold water tank are both connected with a water supplementing tank, and a third water supplementing pump, a second auxiliary filter and a third check valve are sequentially connected in series between the water outlet of the water supplementing tank and the water inlet of the hot water tank and between the water inlet of the cold water tank.
Furthermore, a pressure gauge is arranged at a water outlet of the main circulating pump, and liquid level transmitters are arranged on the cold water tank, the hot water tank and the degassing buffer tank.
The testing method of the alternating cooling and heating testing device for the converter valve cooling system comprises any one or more of the following steps:
and (3) cold water circulation: closing the first electric valve, opening the second electric valve, the third electric valve and the fourth electric valve, starting the main circulating pump, and forming a cold water circulating loop: the system comprises a cold water tank, a main circulating pump, a main filter, a third electric valve, a converter valve to be tested, a fourth electric valve and a degassing buffer tank;
hot water circulation: closing the second electric valve, opening the first electric valve, the third electric valve and the fourth electric valve, starting the main circulating pump, and forming a hot water circulating loop: the system comprises a hot water tank, a main circulating pump, a main filter, a third electric valve, a converter valve, a fourth electric valve and a degassing buffer tank;
cold and hot alternate circulation: cold water circulation-cold water blowing by an air compressor-hot water circulation-hot water blowing by an air compressor to form a cold and hot alternating circulation loop, and testing the cold and hot alternating circulation loop, wherein,
blowing cold water by an air compressor: closing the first electric valve, the second electric valve and the third electric valve, opening the fourth electric valve and the sixth electric valve, and pushing pure water to flow through a line by compressed air generated by the air compressor: the converter valve, the fourth electric valve, the degassing buffer tank, the main circulating pump, the main filter, the sixth electric valve and the cold water tank are connected in series;
blowing hot water by an air compressor: closing the first electric valve, the second electric valve and the third electric valve, opening the fourth electric valve and the fifth electric valve, and pushing pure water to flow through a line by compressed air generated by the air compressor: the converter valve, the fourth electric valve, the degassing buffer tank, the main circulating pump, the main filter, the fifth electric valve and the hot water tank are arranged in the vacuum cavity;
in the cold water circulation, hot water circulation and cold and hot alternate circulation processes, the processes are continued for a certain time, and whether the main circulation system is abnormal or not is observed.
Furthermore, before cold water circulation, hot water circulation and cold and hot alternate circulation are carried out, whether the action of each valve is normal or not needs to be checked, whether the water level of the degassing buffer tank is normal or not and whether the water temperatures of the cold water tank and the hot water tank are normal or not need to be checked, and before the main circulating pump is started, water needs to be injected into the main circulating pump.
Compared with the prior art, the invention has the following beneficial effects:
the cold and hot alternation testing device and the method of the converter valve cooling system connect a hot water tank and a cold water tank in parallel in a main circulating system, a water replenishing pump inputs cold water in the cold water tank or hot water in the hot water tank into a main circulating pump, the main circulating pump drives pure water to circularly flow in the converter valve and the main circulating system, the cold water tank provides cold water circulation for the main circulating system, the hot water tank provides hot water circulation for the main circulating system, cold water and hot water alternation circulation operation can be carried out by utilizing a switch of an electric valve, parameters such as water temperature, pressure, flow rate, testing time and the like of the main circulating system are set according to detection requirements before cold water circulation, hot water circulation and cold and hot alternation circulation are carried out, and cold and hot alternation circulation testing is carried out.
When the converter valve to be tested is subjected to cold-hot circulation alternate testing, the pressure transmitter, the temperature transmitter and the flow transmitter can constantly detect the pressure, the temperature and the flow of the main circulation system and respectively feed the detected pressure, the detected temperature and the detected flow back to the main circulation pump, the degassing buffer tank and the cold water tank/hot water tank, and the degassing buffer tank can regulate the pressure of the main circulation system according to a pressure change signal fed back by the pressure transmitter, so that the main circulation system constantly keeps stable pressure, and the main circulation pump cannot be frequently closed and opened due to pressure change; the electric regulating valve can automatically regulate the opening degree of the electric regulating valve according to the flow change signal fed back by the wave transmitter so as to control the flow of water in the pipeline; the hot water tank and the cold water tank can adjust the temperature of water according to the temperature change signal fed back by the temperature transmitter, and the temperature of the water in the main circulation loop is in a set range.
In addition, in cold and hot circulation in turn in-process, in order to avoid the hot and cold water mixture, influence cold and hot experiment effect in turn, the delivery port department through first solenoid valve access air compressor machine to main circulating system's third motorised valve, through closing to the third motorised valve and opening to fourth motorised valve and first solenoid valve for compressed air in the air compressor machine is through the converter valve that awaits measuring, fourth motorised valve, degasification buffer tank, main circulating pump and main filter, finally blows cold water or hot water to corresponding cold water jar or hot water jar. The invention can simultaneously carry out cold and hot alternate test on a plurality of converter valves to be tested, and only needs to connect the plurality of converter valves to be tested between the water outlet of the third electric valve and the water inlet of the fourth electric valve after the converter valves to be tested are connected in parallel.
The invention has the advantages of simple and compact structure, convenient and easy operation, high automation degree, safety, reliability, high operation efficiency and strong field operability.
Drawings
FIG. 1 is a schematic structural diagram of a cold-hot alternation testing device of a converter valve cooling system according to the present invention;
FIG. 2 is a schematic view of a connection structure of an air compressor in the cold and hot alternation testing device of the converter valve cooling system of the present invention;
fig. 3 is a schematic structural diagram of connection of a water replenishing tank, a hot water tank and a cold water tank in the converter valve cooling system cold-hot alternation testing device.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
In one aspect, the present invention provides a converter valve cooling system cold and hot alternation testing device, as shown in fig. 1 to 3, including a water supply system, a main circulation system and an air compressor, wherein:
the water supply system comprises a hot water tank 1 and a cold water tank 2 which are connected in parallel, and the water outlets of the hot water tank 1 and the cold water tank 2 are respectively connected to the water inlet of the main circulation system through a first water replenishing pump 3, a first electric valve V1, a second water replenishing pump 4 and a second electric valve V2;
the main circulating system comprises a main circulating pump 5, a main filter Z1, a third electric valve V12, a fourth electric valve V14 and a degassing buffer tank 8 which are sequentially connected by pipelines, a water inlet of the main circulating pump 5 is connected with water outlets of the hot water tank 1, the cold water tank 2 and the degassing buffer tank 8, and a converter valve 7 to be tested is connected between a water outlet of the third electric valve V12 and a water inlet of the fourth electric valve V14;
the main circulating pump 5 is connected in parallel with an electric regulating valve V6 for regulating the flow of the main circulating system;
the air outlet of the air compressor 6 is connected with the water outlet of the third electric valve V12 through a first electromagnetic valve V13 and is connected with the air inlet of the degassing buffer tank through a first check valve V16;
the outlet of the main filter Z1 is respectively connected to the water inlets of the hot water tank 1 and the cold water tank 2 through a fifth electric valve V10 and a sixth electric valve V11;
pressure transmitters PT1, PT2 and PT3 are arranged at a water inlet of the main circulating pump 5, a water outlet of the third electric valve V12 and a water inlet of the fourth electric valve V14, temperature transmitters TT1 and TT2 are arranged at a water outlet of the main filter Z1 and a water inlet of the degassing buffer tank 8, and a flow transmitter is further arranged at a water outlet of the main filter Z1.
According to the cold and hot alternation testing device for the converter valve cooling system, a hot water tank 1 and a cold water tank 2 are connected in parallel in a main circulating system, a first water supplementing pump 3 and a second water supplementing pump 4 can respectively input hot water in the hot water tank 1 and cold water in the cold water tank 2 into a main circulating pump 5, the main circulating pump 5 drives the hot water or the cold water to circularly flow in a converter valve 7 to be tested and the main circulating system, the hot water tank 1 provides hot water circulation for the main circulating system, the cold water tank 2 provides cold water circulation for the main circulating system, cold water and hot water alternation circulation operation can be carried out by using the switch of each electric valve, before cold water circulation, hot water circulation and cold and hot alternation circulation are carried out, parameters such as water temperature, pressure, flow rate and testing time of the main circulating system are set according to detection requirements, and cold and hot alternation circulation testing is.
When the converter valve 7 to be tested is subjected to cold-hot circulation alternate testing, the pressure transmitter, the temperature transmitter and the flow transmitter can detect the pressure, the temperature and the flow of the main circulation system constantly and respectively and feed the detected pressure, temperature and flow back to the main circulation pump 5, the degassing buffer tank 8 and the cold water tank 2/hot water tank 1 respectively, and the degassing buffer tank 8 can adjust the pressure of the main circulation system according to a pressure change signal fed back by the pressure transmitter, so that the main circulation system constantly keeps stable pressure, and the main circulation pump cannot be frequently closed and opened due to pressure change; the electric regulating valve V6 can automatically regulate the opening of the electric regulating valve according to the flow change signal fed back by the flow transmitter so as to control the flow of water in the pipeline; the hot water tank and the cold water tank can adjust the temperature of water according to the temperature change signal fed back by the temperature transmitter, so that the temperature of the water in the main circulation loop is kept within a set range.
In addition, in the cold and hot alternating circulation process, in order to avoid mixing cold and hot water, the cold and hot alternating experiment effect is influenced, the air compressor is connected to the water outlet of the third electric valve V12 of the main circulation system through the first electromagnetic valve V13, the compressed air in the air compressor 6 passes through the converter valve 7 to be tested, the fourth electric valve V14, the degassing buffer tank 8, the main circulation pump 5 and the main filter Z1 by closing the third electric valve V12 and opening the fourth electric valve V14 and the first electromagnetic valve V13, and finally, cold water or hot water is blown to the corresponding cold water tank 2 or hot water tank 1.
The invention can simultaneously carry out cold and hot alternate test on a plurality of converter valves to be tested, and only needs to connect the plurality of converter valves to be tested between the water outlet of the third electric valve V12 and the water inlet of the fourth electric valve V14 after the converter valves to be tested are connected in parallel.
The invention has the advantages of simple and compact structure, convenient and easy operation, high automation degree, safety, reliability, high operation efficiency and strong field operability.
As an improvement of the invention, the air compressor 6 is preferably an ultra-silent air compressor, the air outlet of the air compressor 6 is further connected with a water gun 11 and/or a buffer expansion tank 12, and the water outlet of the buffer expansion tank 12 is connected to the water inlet of the main circulation pump 5. The ultra-silent air compressor has the advantages of ultra-silence, ultra-cleanness, low energy consumption, simple operation and the like when in work. After the air compressor 6 is connected with the water gun 11, water on the converter valve platform to be tested can be blown away by using compressed air, and corrosion of cold water or hot water to the converter valve to be tested and the platform of the converter valve to be tested can be avoided. The buffer expansion tank 12 can assist the degassing buffer tank 8 in stabilizing the pressure of the main circulation system, so that the pressure of the main circulation system is kept constant.
In order to ensure the normal operation of the air compressor 6, so that the compressed air output from the air compressor 6 is continuous and clean and does not contain other impurities, an air storage tank 10, a first auxiliary filter Z2, an oil removal filter Z3 and a pressure reduction regulating valve V17 can be connected in series between the air compressor 6 and the third electric valve V12, the water gun 11 and/or the buffer expansion tank 12. The pressure-reducing regulating valve V17 can regulate the pressure of the compressed air output from the air compressor 6 in real time.
Preferably, the main circulation 5 can be two variable frequency pumps with different flow rates, the two main circulation pumps 5 and 5 ' are connected in parallel, the water inlet of each main circulation pump is connected with a butterfly valve V4 and a butterfly valve V4 ', and the water outlet of each main circulation pump is connected with a second check valve V5 and a second check valve V5 '. Besides the function of a main circulation pump for backup, the two main circulation pumps 5, 5 ' can be changed to use different main circulation pumps 5/5 ' to make the flow range of the main circulation system larger, besides adjusting the frequency of the main circulation pump 5/5 ' and the opening degree of the electric control valve V6.
In the embodiment of the invention, the main circulating pump 5 preferably uses a variable frequency pump with a signal CRN65-20, the pipe diameter of a corresponding butterfly valve V4 is preferably DN100, and the main circulating pump 5 'preferably uses a variable frequency pump with a signal CRN8-6, and the pipe diameter of a corresponding butterfly valve V4' is preferably DN 40.
In addition, in order to adapt the pipeline of the main circulation system to different flow ranges, at least two second electromagnetic valves V7 and a seventh electromagnetic valve V8 which are connected in parallel and have different flow rates are arranged between the water outlet of the main filter Z1 and the water inlet of the third electromagnetic valve V12, and the second electromagnetic valve V7 and the seventh electromagnetic valve V8 are respectively connected with flow transmitters FT1 and FT2 in series. In the embodiment of the invention, a mode that one electromagnetic valve and two electric valves are connected in parallel is adopted, wherein the pipe diameter of the second electromagnetic valve V7 is preferably DN6, the flow range is 1-10L/min, the pipe diameter of the seventh electric valve V8 is preferably DN15, the flow range is 10-100L/min, the pipe diameter of the seventh electric valve V8 is preferably DN15, the flow range is 10-100L/min, the pipe diameter of the eighth electric valve V8 'is preferably DN65, the flow range is 7-70T/h, and the eighth electric valve V8' is also connected with a flow transmitter FT3 in series.
Furthermore, in order to control the water temperatures in the hot water tank 1 and the cold water tank 2 more simply and conveniently to keep the water temperatures in the required temperature range, a heater 1-1 is preferably arranged in the hot water tank 1, a heat exchanger 2-1 is preferably arranged in the cold water tank 2, and the heat exchanger 2-1 is connected with a water cooler 9. The heat exchanger 2-1 can transfer part of heat of water in the cold water tank 2 to water in the water chiller 9, and ensure that the temperature of water in the cold water tank 2 is kept in a required range.
Because the main circulation system is in the course of the work, the water of hot-water cylinder 1 and cold-water cylinder 2 is because consuming and constantly reduces, in order to guarantee the long-time normal operating of main circulation system, as shown in fig. 3, the water inlet of hot-water cylinder 1 and the water inlet of cold-water cylinder 2 all are connected with water make-up tank 13, and it has third water make-up pump 14, second auxiliary filter Z4 and third check valve V19 to establish ties in proper order between the delivery port of water make-up tank 13 and the water inlet of hot-water cylinder 1 and the water inlet of cold-water cylinder 2. Wherein, all be provided with liquid level transmitter LIT1 on hot-water cylinder 1 and the cold water cylinder 2, when liquid level transmitter LIT1 detected the water level of hot-water cylinder 1 and/or cold water cylinder 2 and is less than the water level value of setting for, liquid level transmitter LIT1 is lower than the signal feedback of the water level value of setting for to third water supply pump 14, and third water supply pump 14 starts, pours into hot-water cylinder 1 and/or cold water cylinder 2 into the water in water supply cylinder 13.
Preferably, a pressure gauge PI1 for displaying the pressure of the main circulation system can be further arranged at the water outlet of the main circulation pump 5/5', and a liquid level transmitter LIT2 can also be arranged on the degassing buffer tank.
In another aspect, the invention further provides a testing method of the converter valve cooling system cold and hot alternation testing device, which comprises any one or more of the following steps:
and (3) cold water circulation: closing the first electric valve, opening the second electric valve, the third electric valve and the fourth electric valve, starting the main circulating pump, and forming a cold water circulating loop: the system comprises a cold water tank, a main circulating pump, a main filter, a third electric valve, a converter valve to be tested, a fourth electric valve and a degassing buffer tank;
hot water circulation: closing the second electric valve, opening the first electric valve, the third electric valve and the fourth electric valve, starting the main circulating pump, and forming a hot water circulating loop: the system comprises a hot water tank, a main circulating pump, a main filter, a third electric valve, a converter valve, a fourth electric valve and a degassing buffer tank;
cold and hot alternate circulation: cold water circulation-cold water blowing by an air compressor-hot water circulation-hot water blowing by the air compressor to form a cold and hot alternating circulation loop, testing the cold and hot alternating circulation loop, wherein,
blowing cold water by an air compressor: closing the first electric valve, the second electric valve and the third electric valve, opening the fourth electric valve and the sixth electric valve, and pushing pure water to flow through a line by compressed air generated by the air compressor: the converter valve, the fourth electric valve, the degassing buffer tank, the main circulating pump, the main filter, the sixth electric valve and the cold water tank are connected in series;
blowing hot water by an air compressor: closing the first electric valve, the second electric valve and the third electric valve, opening the fourth electric valve and the fifth electric valve, and pushing pure water to flow through a line by compressed air generated by the air compressor: the converter valve, the fourth electric valve, the degassing buffer tank, the main circulating pump, the main filter, the fifth electric valve and the hot water tank are arranged in the vacuum cavity;
the cold water circulation, the hot water circulation and the cold and hot alternate circulation are all continued for a certain time, and whether the main circulation system is abnormal or not is observed.
In the testing method of the cold and hot alternation testing device of the converter valve cooling system, the hot water tank 1 provides hot water circulation for the main circulation system, the cold water tank 2 provides cold water circulation for the main circulation system, cold water and hot water alternation circulation operation can be carried out by utilizing the switch of each electric valve, and before cold water circulation, hot water circulation and cold and hot alternation circulation, parameters of the main circulation system, such as water temperature, pressure, flow rate, testing time and the like, are set according to the detection requirements, and the converter valve 7 to be tested is subjected to cold and hot alternation circulation testing.
When the converter valve 7 to be tested is subjected to cold-hot circulation alternate testing, the pressure transmitter, the temperature transmitter and the flow transmitter can detect the pressure, the temperature and the flow of the main circulation system constantly and respectively and feed the detected pressure, temperature and flow back to the main circulation pump 5, the degassing buffer tank 8 and the cold water tank 2/hot water tank 1 respectively, and the degassing buffer tank 8 can adjust the pressure of the main circulation system according to a pressure change signal fed back by the pressure transmitter, so that the main circulation system constantly keeps stable pressure, and the main circulation pump cannot be frequently closed and opened due to pressure change; the electric regulating valve V6 can automatically regulate the opening of the electric regulating valve according to the flow change signal fed back by the flow transmitter so as to control the flow of water in the pipeline; the hot water tank and the cold water tank can adjust the temperature of water according to the temperature change signal fed back by the temperature transmitter, so that the temperature of the water in the main circulation loop is kept within a set range.
In addition, in the cold and hot alternating circulation process, in order to avoid mixing cold and hot water, the cold and hot alternating experiment effect is influenced, the air compressor is connected to the water outlet of the third electric valve V12 of the main circulation system through the first electromagnetic valve V13, the compressed air in the air compressor 6 passes through the converter valve 7 to be tested, the fourth electric valve V14, the degassing buffer tank 8, the main circulation pump 5 and the main filter Z1 by closing the third electric valve V12 and opening the fourth electric valve V14 and the first electromagnetic valve V13, and finally, cold water or hot water is blown to the corresponding cold water tank 2 or hot water tank 1.
The invention can simultaneously carry out cold and hot alternate test on a plurality of converter valves to be tested, and only needs to connect the plurality of converter valves to be tested between the water outlet of the third electric valve V12 and the water inlet of the fourth electric valve V14 after the converter valves to be tested are connected in parallel.
The invention has the advantages of simple and compact structure, convenient and easy operation, high automation degree, safety, reliability, high operation efficiency and strong field operability.
Before detecting the converter valve to be tested, in order to prevent unnecessary damage to each valve, the circulating pump degassing buffer tank, the converter valve to be tested and the like due to improper operation when a cold-hot alternation testing device of a converter valve cooling system starts to work, before cold water circulation, hot water circulation and cold-hot alternation circulation are carried out, whether each valve acts normally or not needs to be checked, whether the water level of the degassing buffer tank is normal or not and whether the water temperatures of the cold water tank and the hot water tank are normal or not need to be checked, and before a main circulating pump 5/5 ' is started, in order to prevent a main circulating pump 5/5 ' from suddenly turning, water needs to be injected into a main circulating pump 5/5 '.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. The utility model provides a cold and hot testing arrangement in turn of converter valve cooling system which characterized in that, includes water supply system, main circulation system and air compressor machine, wherein:
the water supply system comprises a hot water tank and a cold water tank which are connected in parallel, and water outlets of the hot water tank and the cold water tank are connected to a water inlet of the main circulating system through a first water replenishing pump, a first electric valve, a second water replenishing pump and a second electric valve respectively;
the main circulating system comprises a main circulating pump, a main filter, a third electric valve, a fourth electric valve and a degassing buffer tank which are sequentially connected by pipelines, a water inlet of the main circulating pump is connected with water outlets of the hot water tank, the cold water tank and the degassing buffer tank, and a converter valve to be tested is connected between a water outlet of the third electric valve and a water inlet of the fourth electric valve;
the main circulating pump is connected in parallel with an electric regulating valve for regulating the flow of the main circulating system;
the air outlet of the air compressor is connected to the water outlet of the third electric valve through a first electromagnetic valve and is connected to the air inlet of the degassing buffer tank through a first check valve;
the outlet of the main filter is respectively connected to the water inlets of the hot water tank and the cold water tank through a fifth electric valve and a sixth electric valve;
the water inlet of the main circulating pump, the water outlet of the third electric valve and the water inlet of the fourth electric valve are respectively provided with a pressure transmitter, the water outlet of the main filter and the water inlet of the degassing buffer tank are respectively provided with a temperature transmitter, and the water outlet of the main filter is also provided with a flow transmitter.
2. The cold and hot alternation test device of the converter valve cooling system according to claim 1, wherein the air compressor is an ultra-silent air compressor, an air outlet of the air compressor is further connected with a water gun and/or a buffer expansion tank, and a water outlet of the buffer expansion tank is connected to a water inlet of the main circulation pump.
3. The alternating cooling and heating test device for the converter valve cooling system according to claim 2, wherein an air storage tank, a first auxiliary filter, an oil removal filter and a pressure reduction regulating valve are further connected in series between the air compressor and the third electric valve, the water gun and/or the buffer expansion tank.
4. The cold and hot alternation test device of the converter valve cooling system as claimed in claim 1, wherein the main circulating pumps are two variable frequency pumps with different flow rates, the two main circulating pumps are connected in parallel with each other, a butterfly valve is connected to a water inlet of each main circulating pump, and a second check valve is connected to a water outlet of each main circulating pump.
5. The alternating cold and hot testing device for the cooling system of the converter valve as claimed in claim 4, wherein at least two second electromagnetic valves and seventh electric valves which are connected in parallel and have different flow rates are arranged between the water outlet of the main filter and the water inlet of the third electric valve, and the flow rate transmitters are respectively connected in series with the second electromagnetic valves and the seventh electric valves.
6. The cold and hot alternation test device for the converter valve cooling system according to claim 4, wherein a heater is arranged in the hot water tank, a heat exchanger is arranged in the cold water tank, and the heat exchanger is connected with a cold water machine.
7. The cold and hot alternation test device for the converter valve cooling system according to claim 6, wherein a water supplementing tank is connected to both the water inlet of the hot water tank and the water inlet of the cold water tank, and a third water supplementing pump, a second auxiliary filter and a third check valve are sequentially connected in series between the water outlet of the water supplementing tank and the water inlets of the hot water tank and the cold water tank.
8. The alternating cold and hot testing device for the converter valve cooling system according to claim 1, wherein a pressure gauge is arranged at a water outlet of the main circulating pump, and liquid level transmitters are arranged on the cold water tank, the hot water tank and the degassing buffer tank.
9. The method for testing a hot and cold alternation testing device of a converter valve cooling system according to any one of claims 1 to 8, characterized by comprising any one or more of the following:
and (3) cold water circulation: closing the first electric valve, opening the second electric valve, the third electric valve and the fourth electric valve, starting the main circulating pump, and forming a cold water circulating loop: the system comprises a cold water tank, a main circulating pump, a main filter, a third electric valve, a converter valve to be tested, a fourth electric valve and a degassing buffer tank;
hot water circulation: closing the second electric valve, opening the first electric valve, the third electric valve and the fourth electric valve, starting the main circulating pump, and forming a hot water circulating loop: the system comprises a hot water tank, a main circulating pump, a main filter, a third electric valve, a converter valve, a fourth electric valve and a degassing buffer tank;
cold and hot alternate circulation: cold water circulation-cold water blowing by an air compressor-hot water circulation-hot water blowing by an air compressor to form a cold and hot alternating circulation loop, and testing the cold and hot alternating circulation loop, wherein,
blowing cold water by an air compressor: closing the first electric valve, the second electric valve and the third electric valve, opening the fourth electric valve and the sixth electric valve, and pushing pure water to flow through a line by compressed air generated by the air compressor: the converter valve, the fourth electric valve, the degassing buffer tank, the main circulating pump, the main filter, the sixth electric valve and the cold water tank are connected in series;
blowing hot water by an air compressor: closing the first electric valve, the second electric valve and the third electric valve, opening the fourth electric valve and the fifth electric valve, and pushing pure water to flow through a line by compressed air generated by the air compressor: the converter valve, the fourth electric valve, the degassing buffer tank, the main circulating pump, the main filter, the fifth electric valve and the hot water tank are arranged in the vacuum cavity;
in the cold water circulation, hot water circulation and cold and hot alternate circulation processes, the processes are continued for a certain time, and whether the main circulation system is abnormal or not is observed.
10. The method as claimed in claim 9, wherein before the cold water circulation, the hot water circulation and the cold and hot alternate circulation, it is checked whether each valve is normally operated, whether the water level of the degassing buffer tank is normal, and the water temperatures of the cold water tank and the hot water tank are normal, and before the main circulation pump is started, the main circulation pump is filled with water.
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| CN109946054A (en) * | 2019-03-21 | 2019-06-28 | 中国科学院高能物理研究所 | A kind of low temperature supercooling circulatory system and low-temperature circulating pump test macro |
| CN110442160B (en) * | 2019-08-12 | 2022-09-02 | 常州博瑞电力自动化设备有限公司 | Air pressure stabilizing device for closed type circulating cooling system |
| CN110501175A (en) * | 2019-08-20 | 2019-11-26 | 国电南瑞科技股份有限公司 | A kind of integrated charge and discharge heat performance testing device of thermal storage equipment |
| CN112539931A (en) * | 2020-12-14 | 2021-03-23 | 沈阳盛世五寰科技有限公司 | High-pressure cold and hot state test system for valve |
| CN113790880A (en) * | 2021-09-15 | 2021-12-14 | 合肥天诺测控科技有限公司 | Water nozzle flow, sealing and sensitivity testing device |
| CN114719331A (en) * | 2022-04-22 | 2022-07-08 | 广东电网有限责任公司广州供电局 | Converter valve heat energy recycling system |
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