CN210243743U - Cold system inner cooling water conductivity measurement return circuit of current conversion station valve - Google Patents
Cold system inner cooling water conductivity measurement return circuit of current conversion station valve Download PDFInfo
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- CN210243743U CN210243743U CN201920251937.4U CN201920251937U CN210243743U CN 210243743 U CN210243743 U CN 210243743U CN 201920251937 U CN201920251937 U CN 201920251937U CN 210243743 U CN210243743 U CN 210243743U
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Abstract
The utility model discloses a cold water conductivity measurement return circuit in cold system of converter station valve relates to converter station valve cooling system, and the high conductivity cooling water that mainly solves single check valve trouble and lead to gets into multiunit conductivity sensor simultaneously and arouses the problem of tripping operation, the utility model discloses an interior cold water major cycle return circuit, inlet outlet connect the deionization return circuit in interior cold water major cycle return circuit, including multiunit conductivity sensor's conductivity measurement return circuit and moisturizing branch road, correspond a check valve, every respectively with the water inlet that conductivity sensor corresponds the water inlet of check valve with the water inlet intercommunication that conductivity sensor corresponds. The utility model provides high system reliability, the maintenance and the inspection of the valve cooling system of being convenient for.
Description
Technical Field
The utility model relates to a convertor station valve cooling system, concretely relates to cold system inner cooling water conductivity measurement circuit of convertor station valve.
Background
The valve cooling system is an important auxiliary system in the HVDC transmission system, and the function of the valve cooling system is to ensure that the converter valve maintains proper temperature during operation. The valve cooling system comprises an inner cooling water system and an outer cooling water system. The function of the internal cooling water system is that a cooling medium (pure water) is driven by a main pump to continuously circulate in the converter valve through a pipeline, and heat generated by the converter valve is brought to an outdoor cooling tower; the function of the external cold water system is to reduce the temperature of the internal cold water through the cooling tower.
An existing measuring circuit for the conductivity of the cold water in the valve cooling system of the converter station is shown in the attached drawing 1, the cold water with too high ion content in the main circulation circuit 3 of the cold water is easy to scale in a closed pipeline and form a conductive circuit, and the cooling effect of the valve can be greatly reduced, so that the deionization circuit 1 connected with an ion exchanger 11 needs to be connected in parallel on the main circulation circuit 3 of the cold water, ions in the cold water in the water replenishing branch circuit 4 and the main circulation circuit 3 of the cold water are adsorbed through the ion exchanger 11, and the purpose of reducing the conductivity is achieved. Meanwhile, the internal cooling water main circulation loop adopts a conductivity measurement loop 2 which is directly connected in parallel and comprises more than two groups of conductivity sensors 24 to strictly monitor the ion content in the internal cooling water main circulation loop 3. In the prior art, in order to prevent the water replenishing branch 4 from replenishing cooling water, the high-conductivity cooling water directly enters the conductivity measurement loop 2, and a check valve 12 is connected between the water inlet of the conductivity measurement loop 2 and the water inlet of the water replenishing branch 4.
The defects of the prior art are as follows: when the check valve 12 fails, the cooling water with high conductivity directly enters the conductivity measuring loop 2 with relatively low water pressure without passing through the ion exchanger 11, so that direct current blocking is caused, and the cooling effect of the valve cooling system is reduced or even the operation is stopped.
Disclosure of Invention
To prior art not enough, the utility model provides a cold water conductivity measurement circuit in cold system of current conversion station valve sets up a corresponding check valve respectively through the water inlet that corresponds with conductivity sensor, when the moisturizing branch road supplyes the cooling water, even single check valve trouble, the cooling water of high conductivity also can not get into multiunit conductivity sensor simultaneously.
In order to achieve the above object, the present invention provides a cold system inner cooling water conductivity measurement circuit of a converter station valve, which comprises an inner cooling water main circulation circuit, a deionization circuit with water inlet and outlet connected to the inner cooling water main circulation circuit, a conductivity measurement circuit and a water replenishing branch circuit; the deionization circuit comprises an ion exchanger; the conductivity measurement loop comprises at least two groups of conductivity sensors connected in parallel and a water inlet corresponding to the conductivity sensors, the water inlet of the conductivity measurement loop is connected between the water inlet of the deionization loop and the water inlet of the ion exchanger, and the water outlet of the conductivity measurement loop is connected between the water outlet of the ion exchanger and the water outlet of the deionization loop; the water outlet of the water replenishing branch is connected between the water inlet of the conductivity measurement loop and the water inlet of the ion exchanger; and the water inlet corresponding to the conductivity sensor corresponds to one check valve respectively, and the water inlet of each check valve is communicated with the water inlet corresponding to the conductivity sensor.
As in the above-mentioned cold water conductivity measurement loop in the converter station valve cooling system, preferably, the water outlet of each group of conductivity sensors is connected with a first ball valve, and the water inlet of each group of conductivity sensors is connected with a second ball valve.
As in the aforementioned cold system internal cooling water conductivity measurement loop of the converter station valve cooling system, preferably, a third ball valve is connected to the deionization loop, a water inlet of the third ball valve is connected to the main circulation loop of the internal cooling water, and a water outlet of the third ball valve is communicated with a water inlet of the conductivity measurement loop.
The cold water conductivity measurement circuit in the cold system of the valve of the converter station as described above, preferably, the deionization circuit further comprises a pressure gauge.
As in the above-mentioned cold water conductivity measuring circuit in a valve cooling system of a converter station, preferably, more than two sets of pipelines including the ion exchanger and the pressure gauge may be arranged in parallel.
The cold water conductivity measuring circuit in the cold system of the converter station valve as described above is preferably connected with at least one set of main filters.
The inner cooling water conductivity measuring circuit in the valve cooling system of the converter station is preferably further connected with a main pressure gauge.
The inner cooling water conductivity measuring circuit in the converter station valve cooling system as described above is preferably connected with a fourth ball valve between the water outlet of the conductivity measuring circuit and the inner cooling water main circulation loop.
Compared with the prior art, the utility model, its beneficial effect lies in:
1. when one check valve fails, the cooling water with high conductivity cannot enter multiple groups of conductivity sensors connected in parallel at the same time.
2. Whether the corresponding check valve breaks down or not is accurately judged by checking the measurement value of the conductivity sensor corresponding to the check valve, and the maintenance and the inspection of a valve cooling system are facilitated.
Drawings
Fig. 1 is a schematic diagram of a prior art cold water conductivity measurement circuit in a valve cooling system of a converter station.
Fig. 2 is a schematic diagram of the cooling water conductivity measurement circuit in the cold system of the converter station valve provided by the present invention.
Wherein: 1-a deionization circuit; 2-conductivity measurement loop; 3-inner cooling water main circulation loop; 4-water replenishing branch; 11-an ion exchanger; 12-a check valve; 24-a conductivity sensor; 10-a deionization circuit; 101-an ion exchanger; 102-a check valve; 103-a third ball valve; 104-pressure gauge; 105-a fourth ball valve; 20-a conductivity measurement loop; 203-a first ball valve; 204-a conductivity sensor; 205-a second ball valve; 30-inner cooling water main circulation loop; 301-a main filter; 302-master pressure gauge; and 40-a water replenishing branch.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Example (b):
fig. 2 is the utility model provides a converter station valve cooling system in cold schematic diagram of cold water conductivity measurement circuit, a converter station valve cooling system in cold water conductivity measurement circuit, it includes that interior cold water major cycle return circuit 30, inlet outlet are connected deionization return circuit 10, conductivity measurement return circuit 20 and moisturizing branch road 40 of interior cold water major cycle return circuit 30, normal water flow direction is shown as fig. 2 black arrow. The deionization circuit 10 comprises an ion exchanger 101, and the ion exchanger 101 can adsorb ions in the cold water main circulation circuit 30 of the internal cold water main circulation circuit 30 entering the deionization circuit 10 and the water replenishing branch circuit 40, so that the purpose of reducing the conductivity is achieved. The conductivity measurement loop 20 comprises at least two groups of conductivity sensors 204 connected in parallel and a water inlet corresponding to the conductivity sensors 204, the water inlet of the conductivity measurement loop 20 is connected between the water inlet of the deionization loop 10 and the water inlet of the ion exchanger 101, the water outlet is connected between the water outlet of the ion exchanger 101 and the water outlet of the deionization loop 10, part of the internal cooling water circulating in the internal cooling water main circulation loop 30 enters the conductivity measurement loop 20, and the conductivity sensors 204 monitor the ion content of the internal cooling water, so that the operations of alarming, tripping and the like can be realized.
The water outlet of the water replenishing branch circuit 40 is connected between the water inlet of the conductivity measurement circuit 20 and the water inlet of the ion exchanger 101, the water replenishing branch circuit 40 is used for replenishing cooling water to the inner-cooling water main circulation circuit 30, and the cooling water entering the inner-cooling water main circulation circuit 30 absorbs ions in the cooling water through the ion exchanger 101. In order to prevent the cooling water with high conductivity from directly entering the conductivity measurement loop 20 when the water supplement branch 40 supplements the cooling water, the water inlets corresponding to the conductivity sensors 204 are respectively provided with a check valve 102, the water inlet of each check valve 102 is communicated with the water inlet corresponding to the conductivity sensor 204, the check valves 102 are used for controlling the one-way conduction of the internal cooling water (the direction is from the white end to the black end of the check valve), when the check valve 102 works normally, the cooling water supplemented by the water supplementing branch 40 does not enter the conductivity measuring circuit 20, when one of the check valves 102 fails, the check valve 102 loses the function of one-way conduction, but because one check valve 102 is respectively arranged at the water inlets corresponding to the conductivity sensor 204, therefore, the high conductivity cooling water does not enter the parallel multiple sets of conductivity sensors 204 at the same time, causing a dc blocking or even tripping condition. Meanwhile, whether the corresponding check valve 102 has a fault or not can be accurately judged by checking the measurement value of the conductivity sensor 204 corresponding to the check valve, so that the maintenance and the inspection of a valve cooling system are facilitated.
Preferably, the water outlet of each group of conductivity sensors 204 is connected with a first ball valve 203, the water inlet of each group of conductivity sensors 204 is connected with a first ball valve 203, and the corresponding conductivity sensors 204 can be isolated by closing the first ball valve 203 and the first ball valve 203, so that online inspection and maintenance are facilitated.
Preferably, the deionization circuit 10 is connected with a third ball valve 103, the water inlet of the third ball valve 103 is connected to the inner-cooling water main circulation circuit 30, and the water outlet is communicated with the water inlet of the conductivity measurement circuit 20, so as to make and break the inner-cooling water in the inner-cooling water main circulation circuit 30 to enter the deionization circuit 10 and the conductivity measurement circuit 20.
Preferably, the deionization circuit 10 further comprises a pressure gauge 104, and the pressure gauge 104 is used for measuring the water pressure in the pipeline.
Preferably, more than two sets of pipelines comprising the ion exchanger 101 and the pressure gauge 104 can be arranged in parallel, and the ion adsorption efficiency can be enhanced by the plurality of sets of pipelines comprising the ion exchanger 101 and the pressure gauge 104.
Preferably, at least one set of main filters 301 is further connected to the main circulation circuit 30 for filtering impurities in the internal cooling water in the main circulation circuit 30.
Preferably, a main pressure gauge 302 is further connected to the main circulation circuit 30 for measuring the main line water pressure.
Preferably, a fourth ball valve 105 is connected between the water outlet of the conductivity measurement circuit 20 and the main circulation circuit 30 of the internal cooling water, and is used for switching on and off the internal cooling water of the deionization circuit 10 and the conductivity measurement circuit 20 to enter the main circulation circuit 30 of the internal cooling water.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (8)
1. An inner cooling water conductivity measuring loop of a converter station valve cooling system comprises an inner cooling water main circulation loop (30), a deionization loop (10) with a water inlet and a water outlet connected with the inner cooling water main circulation loop (30), a conductivity measuring loop (20) and a water supplementing branch (40);
the deionization circuit (10) comprising an ion exchanger (101);
the conductivity measurement loop (20) comprises at least two groups of conductivity sensors (204) connected in parallel and a water inlet corresponding to the conductivity sensors (204), the water inlet of the conductivity measurement loop (20) is connected between the water inlet of the deionization loop (10) and the water inlet of the ion exchanger (101), and the water outlet is connected between the water outlet of the ion exchanger (101) and the water outlet of the deionization loop (10);
the water outlet of the water replenishing branch (40) is connected between the water inlet of the conductivity measuring loop (20) and the water inlet of the ion exchanger (101);
the device is characterized in that a water inlet corresponding to the conductivity sensor (204) corresponds to one check valve (102), and a water inlet of each check valve (102) is communicated with a water inlet corresponding to the conductivity sensor (204).
2. The cold water conductivity measurement circuit in a converter station valve cooling system according to claim 1, characterized in that a first ball valve (203) is connected to the water outlet of each set of conductivity sensors (204), and a second ball valve (205) is connected to the water inlet of each set of conductivity sensors (204).
3. The cold water conductivity measurement loop in the cold system of the converter station valve according to claim 1, characterized in that a third ball valve (103) is connected to the deionization loop (10), the water inlet of the third ball valve (103) is connected to the main circulation loop (30) of the cold water, and the water outlet is communicated with the water inlet of the conductivity measurement loop (20).
4. A cold water conductivity measurement circuit in a converter station valve cooling system according to claim 1, characterized in that said deionization circuit (10) further comprises a pressure gauge (104).
5. The cold water conductivity measurement loop in a cold system of a converter station valve according to claim 4, characterized in that the piping comprising said ion exchanger (101) and said pressure gauge (104) can be arranged in more than two sets in parallel.
6. Cold water conductivity measurement circuit in a converter station valve cold system according to claim 1, characterized in that at least one set of main filters (301) is further connected to said main cold water circulation circuit (30).
7. A cold water conductivity measurement circuit in a converter station valve cooling system according to claim 1, characterized in that a main pressure gauge (302) is also connected to said main circulation circuit (30) of cold water.
8. Cold water conductivity measurement circuit in a converter station valve cooling system according to claim 1, characterized in that a fourth ball valve (105) is connected between the outlet of said conductivity measurement circuit (20) and the main circulation circuit (30) of the cold water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920251937.4U CN210243743U (en) | 2019-02-28 | 2019-02-28 | Cold system inner cooling water conductivity measurement return circuit of current conversion station valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920251937.4U CN210243743U (en) | 2019-02-28 | 2019-02-28 | Cold system inner cooling water conductivity measurement return circuit of current conversion station valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210243743U true CN210243743U (en) | 2020-04-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920251937.4U Active CN210243743U (en) | 2019-02-28 | 2019-02-28 | Cold system inner cooling water conductivity measurement return circuit of current conversion station valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210243743U (en) |
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2019
- 2019-02-28 CN CN201920251937.4U patent/CN210243743U/en active Active
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