CN209375484U - 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
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- CN209375484U CN209375484U CN201920284872.3U CN201920284872U CN209375484U CN 209375484 U CN209375484 U CN 209375484U CN 201920284872 U CN201920284872 U CN 201920284872U CN 209375484 U CN209375484 U CN 209375484U
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Abstract
A kind of converter valve cooling system porous graphite screening electrodes are claimed in the utility model; 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 utility model, using cylindrical electrode, reduces electrode surface unit current density in the case where not reducing the equal pressure energy power of electrode, realization slows down dirty layer and is formed, the volume for controlling dirty layer by porous structure simultaneously avoids larger dirty falling off for layer from blocking water pipe, and the situation for causing radiator bad occurs.
Description
Technical field
The utility model belongs to high-voltage dc transmission electrical domain, and in particular to a kind of converter valve is cooling in converter valve cooling system
System 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.The probe portion outer surface of the converter valve of the utility model screening electrodes structure and
The junction of pedestal and probe portion is respectively equipped with anticorrosion conductive layer, avoids and electrochemical corrosion occurs when contacting with water, from
And guarantee that probe portion is securely attached on pedestal, prevent probe portion from falling off.At present valve cooling system screening electrodes mainly by
The stainless steel cylinder or metal platinum cylinder (such as documents 201710882535.X, patent of diameter 2mm, length 20-40mm
Title: converter valve screening electrodes), the dirt layer caused by leakage current constantly gathers on screening electrodes surface, 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 utility model uses graphite electrode, and covers a cylinder porous platinum in graphite electrode surface
Set is formed by the graphite electrode surface for guiding dirty layer to expose on porous platinum set, realizes the size for limiting dirty layer, generation compared with
Small dirt layer is easy to fall off under flow action, but is unlikely to block water pipe initiation accident.
Utility model content
The utility model provides a kind of converter valve cooling system porous graphite screening electrodes, by cylinder graphite electrode
Porous platinum set is installed on surface, limits the dirty layer size on screening electrodes surface, the scaling degree of electrode is effectively reduced, improves equal pressure energy
Power avoids dirty layer from falling off and blocks the generation of water pipe.
The technical solution of the utility model 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 the advantages of the utility model and has the beneficial effect that:
The utility model uses cylinder graphite rod housing porous platinum shell, due to graphite and the excellent electric conductivity of platinum, is guaranteeing
Electrode and valve section water-cooling system aluminium radiator effective equipotential link under the premise of the current potential of efficient balance water route, pass through electrode table
The shrinkage pool in face, 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 increases electrode surface area, reduces the unit current density of electrode surface, slows down the formation of dirty layer, while by using graphite
Part replaces traditional platinum electrode, reduces screening electrodes manufacturing cost.
Detailed description of the invention
Fig. 1 is that the utility model 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
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
It is clear, describe in detail.Described embodiment is only a part of the embodiment of the utility model.
The technical solution that the utility model 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 utility model has the following advantages: substituting former platinum electrode using graphite part, reduce
Screening electrodes cost, and the surface cover porous platinum shell outside graphite have excellent electric conductivity since graphite is same as platinum electrode,
Under the premise of keeping screening electrodes electric conductivity constant, guides dirty layer to be formed at porous place, to limit the size of dirty layer, avoid
Dirty layer falls off the case where blocking water pipe appearance.
The above embodiment is interpreted as being merely to illustrate the utility model rather than limits the guarantor of the utility model
Protect range.After the content for the record for having read the utility model, technical staff can make various changes to the utility model
Or modification, these equivalence changes and modification equally fall into the utility model claims limited range.
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, the pedestal (3) and water wall screw thread in electrode surface
Connection, one end of the cylinder electrode (2) and pedestal (3) are connected and fixed, and there is conduction in the cylinder electrode one end connecting with pedestal
Line (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 electrode
The perforation that conductor wire passes through.
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, feature described in one of -2 exist according to claim 1
In the cylinder platinum shell surface is uniform-distribution with the circular hole or square hole that diameter is 0.5-1mm, and the diameter of cylinder platinum shell is 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 |
|---|---|---|---|
| CN201920284872.3U CN209375484U (en) | 2019-03-06 | 2019-03-06 | A kind of converter valve cooling system porous graphite screening electrodes |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920284872.3U CN209375484U (en) | 2019-03-06 | 2019-03-06 | A kind of converter valve cooling system porous graphite screening electrodes |
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| CN209375484U true CN209375484U (en) | 2019-09-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109756131A (en) * | 2019-03-06 | 2019-05-14 | 重庆大学 | A kind of converter valve cooling system porous graphite screening electrodes |
-
2019
- 2019-03-06 CN CN201920284872.3U patent/CN209375484U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109756131A (en) * | 2019-03-06 | 2019-05-14 | 重庆大学 | A kind of converter valve cooling system porous graphite screening electrodes |
| CN109756131B (en) * | 2019-03-06 | 2024-04-09 | 重庆大学 | Porous graphite voltage-equalizing electrode for converter valve cooling system |
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