CN109756131A - A kind of converter valve cooling system porous graphite screening electrodes - Google Patents
A kind of converter valve cooling system porous graphite screening electrodes Download PDFInfo
- Publication number
- CN109756131A CN109756131A CN201910168171.8A CN201910168171A CN109756131A CN 109756131 A CN109756131 A CN 109756131A CN 201910168171 A CN201910168171 A CN 201910168171A CN 109756131 A CN109756131 A CN 109756131A
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- cylinder
- pedestal
- graphite
- porous
- electrode
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 51
- 239000010439 graphite Substances 0.000 title claims abstract description 51
- 238000012216 screening Methods 0.000 title claims abstract description 32
- 238000001816 cooling Methods 0.000 title claims abstract description 25
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 58
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 29
- 239000004020 conductor Substances 0.000 claims abstract description 11
- 239000000498 cooling water Substances 0.000 claims abstract description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 17
- -1 polypropylene Polymers 0.000 claims description 9
- 239000004411 aluminium Substances 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 239000004743 Polypropylene Substances 0.000 claims description 6
- 229920001155 polypropylene Polymers 0.000 claims description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000009827 uniform distribution Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 2
- 239000007770 graphite material Substances 0.000 claims description 2
- 239000000523 sample Substances 0.000 abstract description 12
- 238000000605 extraction Methods 0.000 abstract description 3
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Abstract
A kind of converter valve cooling system porous graphite screening electrodes are claimed in the present invention; the porous graphite screening electrodes are inserted into inner cold water by the pedestal on cooling water water pipe; it includes a pedestal and the porous probe of a cylindrical graphite; the extraction conductor wire being conductively connected with probe is equipped in the pedestal; one end of the porous probe of cylindrical graphite and pedestal just connect; the other end is inserted into cooling water pipe, and the porous probe of cylindrical graphite covers embedded graphite column by a porous platinum and forms.The present invention is not in the case where reducing the equal pressure energy power of electrode, using cylindrical electrode, reduce electrode surface unit current density, realization slows down dirty layer and is formed, the volume formed simultaneously by porous structure coordination electrode surface dirt layer, larger dirty falling off for layer is avoided to block water pipe, the situation for causing radiator bad occurs.
Description
Technical field
The invention belongs to high-voltage dc transmission electrical domains, and in particular to a kind of converter valve cooling system in converter valve cooling system
With porous graphite screening electrodes.
Background technique
China has become operation in the world and extra-high voltage direct-current engineering is most, capacity is maximum, the longest spy of route building
D.C. high voltage transmission big country.Converter valve using high-power thyristor as core devices is to guarantee entire HVDC transmission system
The key equipment for continuing safe and stable operation, by installation valve cooling system realize the heat exchange of cooling medium and metal heat sink come
Thyristor is maintained to be in normal working temperature.Deionized water due to its excellent heat dissipation performance and insulation performance be widely used as in
The cooling medium of valve cooling system, since 1992 due to valve cooling system leak event caused by corroding since, valve cooling system
The stray current corrosion of middle fitting such as aluminium radiator receives significant attention, and proposes installation cooling water treatment system control inner cold water
The measures such as water quality, valve section water route installation screening electrodes, effectively reduce the accident as caused by valve cooling system corrosion and occur.However
In recent years, the problems such as water-pipe blockage caused by the fouling of valve inner cold system screening electrodes, heat dissipation bad, water pipe leak caused change of current
Stoppage in transit event of standing occurs repeatly.
By retrieving, documents 201710882535.X converter valve screening electrodes, the prior art being closest to, one
Kind converter valve screening electrodes.Converter valve screening electrodes include the electrode mounting hole for being sealingly fitted to converter valve cold water pipe
In pedestal, pedestal is equipped with probe portion for being inwardly inserted into converter valve cold water pipe, the outer surface of probe portion and spy
Needle part and pedestal junction are respectively equipped with anticorrosion conductive layer, and the outer end away from probe portion of base portion is equipped with and probe
The outer conductive connection part of partially electronically conductive connection.Converter valve of the invention the probe portion outer surface of screening electrodes structure and pedestal
It is respectively equipped with anticorrosion conductive layer with the junction of probe portion, avoids and electrochemical corrosion occurs when contacting with water, to protect
Card probe portion is securely attached on pedestal, prevents probe portion from falling off.Valve cooling system screening electrodes are mainly by diameter at present
2mm, length 20-40mm stainless steel cylinder or metal platinum cylinder (such as documents 201710882535.X, patent name:
Converter valve screening electrodes), the dirt layer caused by Leakage Current constantly gathers on screening electrodes surface, it is attached to electrode surface,
The big formation of a step-length of going forward side by side is easy to fall off when larger blocky, causes water-pipe blockage, and reduce the equal pressure energy power of electrode.
Therefore, it to avoid the appearance of electrode surface bulk dirt layer and the reduction of the equal pressure energy power of electrode, is pressed not changing
In the case where electrodes conduct performance, the present invention uses graphite electrode, and covers a cylinder porous platinum set in graphite electrode surface, leads to
It crosses the graphite electrode surface for guiding dirty layer to expose on porous platinum set to be formed, realizes the size for limiting dirty layer, the smaller dirt of generation
Layer is easy to fall off under flow action, but is unlikely to block water pipe initiation accident.
Summary of the invention
The present invention provides a kind of converter valve cooling system porous graphite screening electrodes, by cylinder graphite electrode surface
Porous platinum set is installed, the dirty layer size on screening electrodes surface is limited, the scaling degree of electrode is effectively reduced, after improving electrode fouling
Equal pressure energy power, avoid dirty layer from falling off and block the generation of water pipe.
Technical scheme is as follows:
A kind of converter valve cooling system porous graphite screening electrodes, comprising: be mounted on the bottom on converter valve inlet/outlet pipe
Seat and cylinder electrode, pedestal are used to for electrode being fixed on entry/exit pipe, and cylinder electrode is used for and aluminium heat dissipation in valve section cooling system
Device equipotential link clamps down on water route Potential distribution, avoids generating Leakage Current in water, and the cylinder electrode is using graphite material
Electrode, the cylinder electrode include cylinder graphite carbon rod and porous circular cylinder platinum shell, and porous circular cylinder platinum shell is wrapped in cylinder graphitic carbon
Stick, so that shrinkage pool is formed in electrode surface, and cylinder graphite carbon rod and cylinder platinum shell have excellent electric conductivity, it can be cold with valve
System aluminium radiator keeps good electrical connection, and the pedestal and water wall are threadedly coupled, one end of the cylinder electrode and
Pedestal is connected and fixed, and there is conductor wire extraction in the cylinder electrode one end connecting with pedestal, and the other end of cylinder electrode is inserted into water pipe
Inner cold water in, the base top is equipped with the perforation that passes through for cylinder electrode conductor wire.Porous graphite screening electrodes pass through bottom
The aluminium radiator equipotential link in conductor wire and valve section cooling water channel that seat is drawn, due to the satisfactory electrical conductivity of graphite and platinum,
Under the premise of guaranteeing balanced water route current potential, the dirty layer size of electrode surface formation is limited by porous setting, avoids dirt
Layer is too big and falls off and blocks water pipe.
Further, the lower surface two sides of the pedestal, which have respectively, an o-ring groove, and is equipped with sealing ring, and bottom
There are external screw thread in the two sides of seat, for connecting with converter valve inlet/outlet pipe.
Further, the cylinder graphite carbon rod diameter is 2-4mm, length 20-40mm, and top is connected with a conduction
Line.
Further, the cylinder platinum shell surface is uniform-distribution with the circular hole or square hole that diameter is 0.5-1mm, and cylinder
The diameter of platinum shell is that 2-4mm, length 20-4mm, diameter and length are consistent with cylinder graphite carbon rod, with a thickness of 0.5-
1.5mm。
Further, the pedestal shape is round or rectangular.
Further, the cylinder graphite carbon rod forms cylinder electrode by insertion porous circular cylinder platinum shell fixation.
Further, the material of the pedestal is polypropylene, polypropylene or polytetrafluoroethylene (PTFE) composition.
It advantages of the present invention and has the beneficial effect that:
The present invention uses cylinder graphite rod housing porous platinum shell, due to graphite and the excellent electric conductivity of platinum, is guaranteeing electrode
With the effective equipotential link of valve section water-cooling system aluminium radiator, under the premise of the current potential of efficient balance water route, pass through electrode surface
Shrinkage pool, the dirty layer size of limitation electrode surface deposition, avoids dirty layer from falling off and blocks water pipe；In addition to this, Kong Yuanzhu graphite electrode
Electrode surface area is increased, the unit current density of electrode surface is reduced, slows down the formation of dirty layer, while by using graphite part
Instead of traditional platinum electrode, screening electrodes manufacturing cost is reduced.
Detailed description of the invention
Fig. 1 is that the present invention provides the schematic diagram of preferred embodiment porous graphite screening electrodes；
Fig. 2 is that porous graphite screening electrodes are mounted on the schematic diagram on inlet/outlet pipe；
Description of symbols: 1- conductor wire；2- graphite cylinder electrode；3- pedestal；4- sealing ring；5- porous platinum set.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, detailed
Carefully describe.Described embodiment is only a part of the embodiments of the present invention.
The technical solution that the present invention solves above-mentioned technical problem is:
The present embodiment provides a kind of converter valve cooling system porous graphite screening electrodes, as shown in Figure 1, including being mounted on
Pedestal and cylinder electrode on converter valve inlet/outlet pipe, pedestal and screw thread are connect with inlet/outlet pipe, and base top is equipped with and supplies
The perforation that cylinder electrode conductor wire passes through, cylinder electrode one end and pedestal are connected and fixed, and the cylinder electrode one connecting with pedestal
There is conductor wire extraction at end, and the other end is inserted into the inner cold water of water pipe.
Refering to Figure 1, the lower surface two sides of pedestal, which have respectively, an o-ring groove, and sealing ring is installed, and
There are external screw thread in the two sides of pedestal, for connecting with converter valve inlet/outlet pipe.
Refering to Figure 1, pedestal shape is round or rectangular.
Refering to Figure 1, the material of pedestal is polypropylene, polypropylene or polytetrafluoroethylene (PTFE) composition.
Refering to Figure 1, cylinder electrode includes cylinder graphite carbon rod 2 and cylinder platinum shell 5, cylinder graphite carbon rod diameter is
2-4mm, length 20-40mm, and top is connected with a conductor wire 1.
Refering to Figure 1,5 surface of cylinder platinum shell is uniform-distribution with the circular hole or square hole that diameter is 0.5-1mm, expose
Part graphite carbon rod, and the diameter of cylinder platinum shell is 2-4mm, length 20-4mm, diameter and length and cylinder graphite carbon rod
It is consistent, with a thickness of 0.5-1.5mm.
Refering to Figure 1, cylinder graphite carbon rod 2 realizes the fixation of the two by insertion porous circular cylinder platinum shell 5.
It please refers to shown in Fig. 2, porous graphite screening electrodes are connect by screw thread with inlet/outlet pipe.
Compared with the prior art, the present invention has the following advantages: former platinum electrode is substituted using graphite part, reduces equal piezoelectricity
Pole cost of manufacture, and the surface cover porous platinum shell outside graphite guide dirty layer under the premise of keeping screening electrodes electric conductivity constant
It is formed at porous place, to limit the size of dirty layer, dirty layer is avoided to fall off the case where blocking water pipe appearance.
The above embodiment is interpreted as being merely to illustrate the present invention rather than limit the scope of the invention.?
After the content for having read record of the invention, technical staff can be made various changes or modifications the present invention, these equivalent changes
Change and modification equally falls into the scope of the claims in the present invention.
Claims (7)
1. a kind of converter valve cooling system porous graphite screening electrodes, comprising: the pedestal being mounted on converter valve inlet/outlet pipe
(3) and cylinder electrode (2), pedestal (3) are used to for electrode being fixed on entry/exit pipe, and cylinder electrode (2) is used for and valve section cooling system
Aluminium radiator equipotential link in system, realization clamp down on water route Potential distribution, avoid generating Leakage Current in water, which is characterized in that
The cylinder electrode (2) uses the electrode of graphite material, and the cylinder electrode (2) includes cylinder graphite carbon rod and porous circular cylinder platinum
Shell, porous circular cylinder platinum shell are wrapped in cylinder graphite carbon rod, form shrinkage pool, and cylinder graphite carbon rod and cylinder platinum shell in electrode surface
With excellent electric conductivity, good electrical connection, the pedestal (3) and water wall can be kept with valve cooling system aluminium radiator
It is threadedly coupled, one end of the cylinder electrode (2) and pedestal (3) are connected and fixed, and the cylinder electrode one end connecting with pedestal has
Conductor wire (1) is drawn, and in the inner cold water of the other end insertion water pipe of cylinder electrode (2), is equipped at the top of the pedestal (3) for cylinder
The perforation that electrodes conduct line passes through, the aluminium in conductor wire and valve section cooling water channel that porous graphite screening electrodes are drawn by pedestal
Radiator equipotential link, due to the satisfactory electrical conductivity of graphite and platinum, under the premise of guaranteeing balanced water route current potential, by porous
Setting limit the dirty layer size of electrode surface formation, avoid dirty layer too big and fall off and block water pipe.
2. a kind of converter valve cooling system porous graphite screening electrodes according to claim 1, which is characterized in that described
The lower surface two sides of pedestal (3) have respectively and have an o-ring groove, and are equipped with sealing ring (4), and there are outer spiral shell in the two sides of pedestal
Line, for being connected with converter valve inlet/outlet pipe.
3. a kind of converter valve cooling system porous graphite screening electrodes, feature described in one of -2 exist according to claim 1
In the cylinder graphite carbon rod diameter is 2-4mm, length 20-40mm, and top is connected with a conductor wire (1).
4. a kind of converter valve cooling system porous graphite screening electrodes described described in one of -2 according to claim 1,
It is characterized in that, the cylinder platinum shell surface is uniform-distribution with the circular hole or square hole that diameter is 0.5-1mm, and cylinder platinum shell is straight
Diameter is that 2-4mm, length 20-4mm, diameter and length are consistent with cylinder graphite carbon rod, with a thickness of 0.5-1.5mm.
5. a kind of converter valve cooling system porous graphite screening electrodes according to claim 1, which is characterized in that described
Pedestal (3) shape is round or rectangular.
6. a kind of converter valve cooling system porous graphite screening electrodes according to claim 1, which is characterized in that described
Cylinder graphite carbon rod forms cylinder electrode (2) by insertion porous circular cylinder platinum shell fixation.
7. a kind of converter valve cooling system porous graphite screening electrodes according to claim 1, which is characterized in that described
The material of pedestal (3) is polypropylene, polypropylene or polytetrafluoroethylene (PTFE) composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910168171.8A CN109756131B (en) | 2019-03-06 | 2019-03-06 | Porous graphite voltage-equalizing electrode for converter valve cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910168171.8A CN109756131B (en) | 2019-03-06 | 2019-03-06 | Porous graphite voltage-equalizing electrode for converter valve cooling system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109756131A true CN109756131A (en) | 2019-05-14 |
| CN109756131B CN109756131B (en) | 2024-04-09 |
Family
ID=66406896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910168171.8A Active CN109756131B (en) | 2019-03-06 | 2019-03-06 | Porous graphite voltage-equalizing electrode for converter valve cooling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109756131B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111987484A (en) * | 2020-08-19 | 2020-11-24 | 中国南方电网有限责任公司超高压输电公司天生桥局 | Array type electrode needle voltage-sharing electrode and preparation method thereof |
| CN114646235A (en) * | 2020-12-17 | 2022-06-21 | Avl软件和功能有限公司 | Heat exchanger, in particular for power electronics |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016063573A1 (en) * | 2014-10-21 | 2016-04-28 | 信越化学工業株式会社 | Heat dissipation sheet |
| CN107749719A (en) * | 2017-09-26 | 2018-03-02 | 许继集团有限公司 | Converter valve screening electrodes |
| WO2018040508A1 (en) * | 2016-08-31 | 2018-03-08 | 国家电网公司 | Direct current converter valve cooling water channel and electrode and metal electrode body thereof |
| CN209375484U (en) * | 2019-03-06 | 2019-09-10 | 重庆大学 | A kind of converter valve cooling system porous graphite screening electrodes |
-
2019
- 2019-03-06 CN CN201910168171.8A patent/CN109756131B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016063573A1 (en) * | 2014-10-21 | 2016-04-28 | 信越化学工業株式会社 | Heat dissipation sheet |
| CN107078112A (en) * | 2014-10-21 | 2017-08-18 | 信越化学工业株式会社 | Fin material |
| WO2018040508A1 (en) * | 2016-08-31 | 2018-03-08 | 国家电网公司 | Direct current converter valve cooling water channel and electrode and metal electrode body thereof |
| CN107749719A (en) * | 2017-09-26 | 2018-03-02 | 许继集团有限公司 | Converter valve screening electrodes |
| CN209375484U (en) * | 2019-03-06 | 2019-09-10 | 重庆大学 | A kind of converter valve cooling system porous graphite screening electrodes |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111987484A (en) * | 2020-08-19 | 2020-11-24 | 中国南方电网有限责任公司超高压输电公司天生桥局 | Array type electrode needle voltage-sharing electrode and preparation method thereof |
| CN114646235A (en) * | 2020-12-17 | 2022-06-21 | Avl软件和功能有限公司 | Heat exchanger, in particular for power electronics |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109756131B (en) | 2024-04-09 |
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