CN110474544A - A kind of underground rectifier - Google Patents

Abstract

The invention discloses a kind of underground rectifiers, rectifier is installed in the manhole for being embedded in underground, but in order to prevent as the electrical equipment of rectifying part by rainwater, underground moisture and pernicious gas damage or corrosion, the heat that rectifier is sealed and filled with nitrogen and is generated due to sealing and in rectifier is discharged into outside, therefore, rectifier can steadily work.Furthermore, rectifier is mounted on underground, accident caused by prevent because of electricity, and bring natural cooling effect than ground since rectifier is filled with nitrogen under the pressure higher than atmospheric pressure since rectifier ambient temperature is relatively low, therefore the infiltration of rainwater or moisture can be prevented, so as to prevent corrosion and damage resulting from, while internal temperature can also be reduced, the temperature of cooling-part and the pressure of refrigerant.Nitrogen is checked and is controlled, so as to steadily operate rectifier.

Description

A kind of underground rectifier

Technical field

Rectifier technical field will be described in more detail the present invention relates to a kind of rectifier for being mounted on underground, should Rectifier is mounted in buried manhole, to prevent due to rainwater or underground moisture, pernicious gas etc. and corrode and damage Electronic equipment inside rectifier.The technical field of the fixed rectifier in underground is can will be close inside air-tightness and air-tightness It closes, and the heat generated inside rectifier is dispersed by outside according to air-tightness, to work with making rectifier steady.

Background technique

In general, rectifier is a kind of circuit device or device, focus on rectification to obtain direct current from AC power source, And have the function of only in one direction by electric current, and silicon diode is in most of power supplys.Thyristor is extensive For controlled rectifier application.

Rectifier, that is, the power converter of large capacity generates a large amount of heat during operation, if being not carried out foot Enough heat dissipations then lead to the failure of device, such as the failure of operation.

When rectifier to be mounted in the device of such as ship or vehicle, installed in the form being isolated from the outside, from And it is mounted with the cooling device for heat dissipation and is isolated from the outside.However, since the rectifier of installation on the ground is easily installed Cooling system, and it is splendid in cooling efficiency and management aspect, but there are the high risks of safety accident, therefore, recently, rectification Device is already installed on underground to prevent safety accident.We are try to by being mounted in low temperature environment come maximum thermal effect Fruit.

At this moment, the rectifier for being mounted on underground is mounted in buried manhole, and is prevented due to penetrating into manhole Rainwater or basement in moisture or pernicious gas caused by electronic equipment corrosion and damage.Therefore, it is necessary to develop one External rectifier can be effectively dissipated by stable air-tightness and air-tightness in the heat that inside generates by kind.

In conjunction with above content, for example, being tied as in Korean Utility Model No.2000-0017866 equipped with air-cooled cooling The prior art of structure, the cooling device used in rectifier are broadly divided into air-cooled and water cooling.In Korean Patent Publication No. 2000- " rectifier cooling device of generator " is disclosed in 0055062, as the prior art with cooling by water structure.

However, the air-cooled cooling structure of the prior art is wherein directly to distribute heat and air is blowed to electronic component The structure of amount, and electronic component is often contacted with outside air, since humidity causes frequently to corrode and failure, and according to Installation environment and be easy accumulation dust.If environment temperature is high, poor cooling performance.

In addition, the water-cooled cooling structure of the prior art needs the heat-exchange device of large size and the portion for conveying coolant Part, the device must be made very big, have the danger of pipe leakage, and when installing rectifier, it is necessary to pacify cooling water pipeline It is fitted together, therefore installs and safeguard there is a difficult problem.

On the other hand, when the rectifier radiator to conventional power converter carries out oily cold, for power converter Semiconductor element (rectifier) is sealed in fuel tank with circulation and cooling oil, and conventional oil injection type rectifier radiator needs Cabinet.Since weight needs very much cooling oil again, installation site is restricted.Price is high, and volume is also very big, need to tank and Converter is separated and is repaired.There is a problem of one it is costly and time-consuming.

Summary of the invention

In order to solve to make the present invention according to above-mentioned problem of the prior art, the rectifier being mounted in basement is gas Close, to prevent from corroding and damage electronic equipment due to the flood in basement, rainwater or pernicious gas.The purpose of the present invention It is to provide a kind of fixed rectifier in underground, the inside that the fixed rectifier in the underground will effectively can be generated from electronic equipment Heat increases to outside.

It is present invention as described above in order to achieve the purpose that, it, will when rectifier to be mounted in the reception space of manhole It is embedded to underground and is formed, and upper opening is opened, and lid is coupled to closed upper part, it is provided with rectification unit and whole for controlling The control unit of unit is flowed, lid is coupled by the filler in case top and case top to keep air-tightness, and is mounted on The side of shell with by the heat dissipation of enclosure interior to outside.It is configured to include a cooling unit, which has One fixed rectifier in underground, it is characterised in that inside is filled with the nitrogen higher than atmospheric pressure.

In addition, lid of the invention is opened by the control of filling-valve and controller, if necessary to fill the interior of shell Portion with discharge filling inside the housing or filled be higher than control unit set by constant-pressure nitrogen nitrogen.When the shell It is characterized in that, when the shell further includes that exhaust valve automatically opens, the shell is characterized in that, the exhaust valve further includes pressure Power table, the pressure gauge are used to measure the pressure of the nitrogen of filling so that the pressure information is passed to described control unit.

In addition, cooling unit of the invention is mounted on heat-absorbing block, and heat-insulating block is mounted on heat-insulating block, and is insulated Block is connected to the side of shell and the inside of shell, and is integrally formed with heat absorbing part.Radiator portion is projected into the outer of shell Portion and the side for being connected to shell, which is connected to inside, and hood is formed on shell, and air blower is set It sets inside the housing.It is characterized in that configuring.

In addition, the present invention receives the temperature information of temperature sensor, the temperature sensor from control unit temperature controller Temperature information be used for by measure interior of shell temperature come transmit by control unit measure temperature information, the temperature sensing Device is used to determine the operation of air blower and the pressure information from control unit.Or wireless communication unit, will any one or Multiple temperature informations are sent to mobile terminal, and by the temperature value of the pressure value of the nitrogen inputted from mobile terminal or interior of shell One or more of be sent to controller.

Since the rectifier of underground installation according to the present invention as described above can be installed in basement, so can To obtain the effect for preventing by electric power safety accident, the temperature around rectifier is relatively low relative to ground, therefore can be with Naturally cooling effect is obtained.It is inside being filled with nitrogen but internal with external pressure (pressure for being higher than atmospheric pressure) filling When, it can prevent from external rainwater or moisture infiltration to inside, to prevent from corroding and its damage, while by checking institute The temperature and pressure for the nitrogen being filled with can obtain the effect for steadily running rectifier to adjust the pressure and internal temperature of nitrogen Fruit.

Detailed description of the invention

Fig. 1 is the perspective view for showing the rectifier of preferred embodiment in accordance with the present invention；

Fig. 2 is the perspective view for showing the cooling unit of preferred embodiment in accordance with the present invention；

Fig. 3 is the decomposition perspective view for showing the cooling unit of preferred embodiment in accordance with the present invention；

Fig. 4 is the elevational sectional view for schematically showing rectifier according to the preferred embodiment of the invention；

Fig. 5 is the elevational sectional view for schematically showing rectifier according to another embodiment of the present invention.

In figure: 10 manholes, 12 lids, 14 storage spaces, 20 shells, 22 pressure gauges, 24 temperature sensors, 30 lids, 32 fillers, 34 filling-valves, 36 exhaust valves, 40 cooling ends, 41 heat insulations, 42 endothermic sections, 43 heat-sink units, 44 shells, 45 hair dryers, 50 controls Unit processed, 60 temperature controllers, 70 wireless communication units, 100 portable terminals.

Specific embodiment

The present invention relates to a kind of rectifiers for being mounted on underground to be more particularly installed in for rectifier technical field In buried manhole, thus keep external temperature lower due to the safety of high pressure and the characteristic on ground, thus obtained from Right cooling effect, rainwater in order to prevent due to ground, moisture or spreading unchecked for pernicious gas and caused by electricity inside rectifier Nitrogen, is filled into the inside and shell 10 of shell 20 by the corrosion and its damage of sub- equipment at a pressure exceeding the atmospheric pressure Portion.This is a kind of technology for the fixed rectifier in underground, and the heat of generation can be effectively dissipated to outside, to make whole Flowing device being capable of stable operation.

It is buried under the ground as described above for realizing construction of the invention to form accommodation space 14, top is unlimited , it is closed that the accommodation space 14 of manhole 10, which is attached to upper cover 12,.In the rectifier for being equipped with rectifier, there is rectifier With the control unit 50 for controlling rectifier, upper opening is shell (20)；And the top of shell 20 passes through hermetically sealed packaging (32) connection of lid 30 is to keep；Cooling unit 40 be mounted on the side of shell 20 with by the heat dissipation inside shell 20 to outer Portion, wherein shell 20 is filled with nitrogen under atmospheric pressure or higher pressure.

In addition, lid 30 of the invention is filling-valve 34, nitrogen can be filled in the inside of shell 20；Also, if If needing, opened by the control of control unit 50 to the inside of shell 20.It is further configured to the nitrogen of discharge filling, Or it is automatically opened when pressure is higher than the nitrogen of the setting pressure from control unit (50)；Shell 20 is configured to include filling Nitrogen pressure.For pressure information to be transferred to the pressure gauge 22 of control unit 50, which is characterized in that it further includes.

In addition, cooling unit 40 of the invention is heat insulation 41, it is connected to the side of shell 20；And it absorbs heat and is mounted In heat insulation 41 and it is projected into the inside of shell 20.Radiator portion 43 be formed in the side of shell 20 and with the one of heat dump 42 It is formed to be projected into the outside of shell 20.Shell (44) is connect with (41), and radiating part (43) is connect with the shell (44), on it It is formed with hood (44a).

In addition, the present invention receives the temperature information of temperature sensor 24 from control unit 50 and pressure fan 45, which is passed Sensor 24 sends the temperature information measured by control unit 50 by the temperature inside measurement shell 20.Temperature controller 60 is true It is fixed whether to operate；From controller 50 at least one of the pressure information of mobile terminal 100 and temperature information, and from shifting Any one of the temperature value in nitrogen pressure or shell 20 that dynamic terminal 100 inputs.It is characterized by further comprising: wireless Communication unit 70, for sending one or more to control unit 50.

It hereinafter, will be referring to Fig. 1 to Fig. 5 the present invention is described in detail for showing the embodiment of the present invention.

Firstly, rectifier embedment underground of the invention is formed in the accommodation space 14 of manhole 10, accommodation space is formed 14, top is opened, and lid 12 is connected to closed upper part since manhole 10 refers to the conventional manhole for maintenance, by pacifying in underground Lower part and the side of concrete material are filled to be embedded to underground certain depth, or installation sewer or electric wire and communication line come into Row maintenance.

Specifically, the bottom (not shown) of manhole 10 and concrete material is integrally formed to stop outside moisture or different Object and the side wall (not shown) formed above, lid 12 is attached to the top of side wall, and is formed wherein by bottom and side wall The accommodation space 14 of rectifier is installed.

At this point, lid 12 can be formed at least one gas vent (not shown) etc., so that the air inside manhole 10 can be with Outside connection, gas vent are as shown in Figure 1.Similarly, as shown in figure 5, bending (is not shown with the gas vent for preventing rainwater to be introduced into Out) or discharge portion (not shown) is formed so that rainwater does not flow.

In addition, the gas vent and discharge portion that project upwards correspond to the people newly installed in the suitable position for installing rectifier The case where hole 10, and when using conventional manhole, rainwater flows into conventional manhole.It is preferred that being not provided with rectifier in inside.

In conjunction with the above, lid 12 can be configured to further comprise at least one by transparent glass material or synthetic resin Identification division 12a made of material, as shown in Figures 4 and 5.Confirmation unit 12a promotes passing through for radio wave or frequency, thus real It now smoothly sends and receives the radio communication unit 70 that will be discussed in more detail below and visually sees in manhole 10 State effect.By checking the external status of rectifier, operator can determine whether to carry out outside rectifier Maintenance.

Shell 20 is to realize main component of the invention.

It is made of the resistant material of such as stainless steel, and wherein have the rectification part made of electronic equipment and For controlling the control unit 50 of the rectification part, top is unlimited, and the accommodation space 14 of manhole 10 is buried under the ground.It is in place And it is fixedly mounted.At this point, rectifier is made of the electronic equipment in conventional rectifiers, to omit detailed description, and controller 50 control rectifiers execute rectifying action.

In addition, shell 20 of the invention is characterized in that, the lid 30 that will be described in detail later is connected to top, and It wherein is filled with nitrogen to be higher than the pressure of atmospheric pressure, and the shell of shell 20 is filled by nitrogen by preventing rainwater, underground Moisture or pernicious gas penetrate into inside, can obtain the effect for preventing corroding and damage rectifier.

In conjunction with the above content, the gasket 32 on top that lid 30 of the invention passes through shell 20 is airtightly connected, rainwater, Moisture etc. is connected to the coupling part with shell 20.It permeates in order to prevent, gasket 32 is coupled to be located in coupling part Place, to keep the air-tightness of shell 20.At this point, preferably by bolt or screw etc. by the connection of lid 30 and shell 20 securely Connection, lid 30 can separate during maintenance.

In addition, lid 30 is the top that filler 32 is first coupled to shell 20, or then filler 32 is connected to inside It is placed in the bolt on the top of shell 20 or fixed with screw etc..

Specifically, lid 30 is filled by filling-valve 34 to fill the inside of shell 20, and if desired, by control unit 50 It controls to fill the inside of shell 20.It is characterized in that, it further includes exhaust valve 36, for discharging nitrogen, or when pressure is high It is automatically opened when the nitrogen of the setting pressure from controller 50 is filled.

After lid 30 is connected to air-tightness by the filler 32 on the top of shell 20, filling-valve 34 is used in shell Nitrogen is filled in 20.

In addition, being vented to shell 20 when filling nitrogen in shell 20 in exhaust valve 36 by using filling-valve 34 Inside, exhaust valve 36 become shell.When internal pressure 20, which is increased to predetermined pressure, sets pressure or more, air is automatically opened Inner air to be discharged into the outside of shell 20.

At this point, being set as automatically opening and exhaust valve 36 is set as the pressure higher than atmospheric pressure, thus by filling out The internal pressure of cover 20 is maintained the pressure higher than atmospheric pressure by the nitrogen filled, therefore, can be effectively prevented moisture or nocuousness Gas penetrates into the bound fraction of shell 20 and lid 30.

In addition, exhaust valve 36 can be opened by the control of control unit 50, when in the case where needing to safeguard in shell When opening lid 30 under the higher state of 20 internal pressure, there is the risk that accident occurs.Therefore, operator is by using control Unit 50 opens exhaust valve 36 by force to reduce the pressure inside shell 20, then opens lid 30, can prevent safe thing in advance Therefore generation.Effect can be obtained.

That is, exhaust valve 36 is automatic when nitrogen of the packing ratio from the setting pressure of conventional control unit 50 high pressure It opens, so that the pressure inside shell 20 is not higher than setting pressure, thus the inside of shell 20.The pressure for keeping user constant Power can be by later by 100 positive opening exhaust valve 36 of the portable terminal of description to control unit 50 when needing to safeguard Safely to maintain user.

At this point, shell 20 can be configured to further comprise pressure gauge 22, which is used to measure the nitrogen of filling For the pressure of gas pressure information is transmitted to controller 50, pressure gauge 22 is not only nitrogen.Gas inside measurement shell 20 Pressure after, send controller 50 for the pressure information of measurement, and unit 70 is sent controller 50 by wireless communication Pressure information, this will be described in detail later.By being transmitted to portable terminal 100, operator can easily check shell Pressure inside 20, this realizes the effect for more safely opening lid 30 when maintenance as described above needs.

In addition, according to the present invention, operator, which not only can be set, to be automatically opened by mobile terminal 100 to control unit 50 The setting pressure of exhaust valve 36, and can be with positive opening exhaust valve 36.

Also, hereby it is possible to adjust accordingly the pressure for being filled with nitrogen inside shell 20, operator can be according to outside The season of temperature suitably adjusts the pressure inside shell 20 by mobile terminal (100).

Cooling unit 40 is to realize main component of the invention.

The side of shell 20 is mounted on so that, to outside, at least one is mounted on shell 20 by the heat dissipation inside shell 20 Side, heat from inside shell 20 rectifying part generate by may be implemented to make the movement of rectifier suitable to external discharge Smooth effect.

In addition, since rectifier of the invention is installed in underground, so while lid 30, sealing element 32 and shell 20 pass through The nitrogen filled at a pressure exceeding the atmospheric pressure and there is improveds air-tightness, therefore shell (20) is used for internal generation The construction that heat is dispersed into external cooling unit 40 is essential.

At this point, rectifier of the invention is relatively easy to install than water-cooled and oil injection type, air-cooled cooling structure is suitable , because environment temperature is lower than ground due to the characteristic for being mounted on underground, nitrogen is filled in shell 20, and rectifier is preferably not It is to be blowed air into air by air cooling, but the heat generated inside shell 20 is discharged by outside by conduction.

Specifically, as described above, cooling unit 40 of the invention is filled with nitrogen, and the temperature phase of the outside of shell 20 To the temperature for being lower than ground, so that heat is discharged into outside by conduction.As construction, heat insulation 41 is connected to the one of shell 20 Side, heat absorbing part 42 are mounted on heat insulation 41 and are projected into the inside of shell 20, and shell (it is mounted on 20 side, with Heat absorbing part 42 is integrally formed, and the heat-insulating block 41 for being coupled to radiator portion 43 and being projected into outside shell 20, heat discharge unit 43 are connected to inside, and including shell 44, are formed with hood 44a on shell 44, and shell 44 is arranged in fan 44 It is internal.

Collets 41 are coupled to the through-hole (not shown) that is formed on the side of shell 20 to maintain the air-tightness of shell 20, Endothermic section 42 is located at the inside of shell 20.Heat is absorbed, and the heat that heat-sink unit 43 will be absorbed from heat absorption unit 42 Amount is discharged into the outside of shell 20.

At this point, since any construction of radiator used in the prior art can be used in endothermic section 42 and radiating part 43, Therefore its detailed description will be omitted, and is contained in shell 20 by heat transfer.Obviously, which must be configured to Heat caused by absorbing and the outside for releasing into shell 20.

In addition, shell 44 is connected to the side of shell 20 along the outward direction of shell 20, that is, heat insulation 41 and radiator portion 43, the radiator portion is in order to protect 43 and raising simultaneously works as washer to the air-tightness of the coupling part of heat-insulating block 41 and shell 20 When (not shown) is connected to the side of shell (20), washer (not shown) is connected to coupling part.

In addition, being formed with hood (44a) at the top of shell 44, which sheds single from heat dissipation upwards The heat that member 43 distributes, forms at least one hood (44a).Preferably, it is expected that only being formed on the top, effectively to release Thermal discharge.

Air blower 45 is arranged in shell 44.Preferably, air blower 45 is attached to the lower part of heat-insulating block 41, along a side It is prominent to the i.e. outside (not shown) of shell 20.It is connect with the top of radiator portion 43, and is located in the lower section of radiator portion 43, To realize the effect for allowing smoothly to move in the upward direction from the heat that radiator portion 43 discharges.

In conjunction with the above content, the present invention receives the temperature information of temperature sensor 24, and the temperature sensor 24 is for passing through The internal temperature of the shell (20) blown is measured to transmit the temperature information measured by control unit 50.It is characterized in that, it is also Including the temperature controller 60 whether being currently running for determining fan 45.

Temperature sensor 24 be installed at least one in shell 20 at, be transmitted to measuring the temperature in shell 20 Control unit 50 will be described in control unit 50 later.By sending work for temperature information via wireless communication unit 70 The mobile terminal 100 of people, operator can determine the temperature inside rectifier.

In addition, temperature controller 60 is connected to control unit 50, to receive the temperature inside shell 20 from temperature sensor 24 Information is spent, to determine whether to operate air blower 45, shell.(20) in situation about being judged as more than the temperature within predetermined temperature Under, by sending the action command for operating fan fan 45 to control unit 50, it can suitably maintain framework (20) inside Temperature.Realize it.

In addition, temperature controller 60 allows operator that the temperature inside shell 20 is arranged using mobile terminal 100, this changes The temperature difference for determining the operation of default air blower 45 is become.It therefore, can be to shell 20 by determining whether air blower 45 operates Inside carry out temperature control.

That is, adjusting the temperature inside shell 20 by temperature controller 60 through the invention, operator can be suitably The temperature inside rectifier of the invention is kept, keeps air-tightness to create stable operating environment at such a temperature.

In conjunction with the above content, the present invention is by any one or more of pressure information or temperature information from control unit 50 It is sent to the mobile terminal 100 of worker, the containing of the pressure value or nitrogen that input from mobile terminal 100.(20) it is characterized in that, It further includes wireless communication unit 70, for any one or more of internal temperature values to be transferred to control unit 50.

In addition, the temperature information measured by temperature sensor 24 is sent controller 50 by wireless communication unit 70, and The pressure information inside shell 20 measured by pressure gauge 22 is controlled that (when being transported to 50, controller is from controller by controller 50 receive temperature information and pressure information, and send temperature information and pressure information to the mobile terminal 100 of worker, operation Person is easily by pressure and temperature and shell (inside rectifier) 20) by checking external (i.e. shell 20) external cooling The temperature of unit 40 come realize check rectifier working environment effect.

In addition, the control of portable terminal 100 that wireless communication unit 70 is carried by operator is filled in inside shell 20 Shell 20 inside nitrogen pressure value or one or more of temperature value.The pressure received can be used in controller 50 Any one of value or temperature value adjust the internal pressure and temperature of shell 20.

That is, controller 50 receives the pressure information inside the shell 20 measured by pressure gauge 22, so that operator can be with The pressure inside shell 20 is checked when needing to safeguard, and wireless communication unit 70 is worked as pressure information and is sent to by operator When the portable terminal 100 of worker, operator checks the pressure in shell 20 by portable terminal 100, then portable Lid 30 is removed before terminal 100.By the pressure value in input shell 20, operator is forced to receive the control of input pressure value Unit 50 opens exhaust valve 36 to reduce the pressure in shell 20.Lid (30) can safely be removed.

In addition, control unit 50 receives the temperature information measured from temperature sensor 24, and unit by wireless communication 70 send temperature information to the mobile terminal 100 of worker, and operator 100 is that mobile terminal 100 can check the interior of shell 20 Portion and external temperature, and if it is determined that inside and outside temperature anomaly, then be input to mobile terminal 100 for temperature value, therefore Control unit 50 receives the temperature value of input.By the way that temperature value is transmitted to temperature controller 60 so that temperature controller 60 can Operate air blower 45, the temperature in adjustable shell 20.

In addition, Fig. 5 shows another embodiment of cooling unit 40 of the invention, which is by heat insulation 41 are mounted on lid 30, and the inside endothermic section 42 of casing 20 is prominent, form radiating part 43 in the top of shell 20, feature exists In the radiating part 43 extends to the upper cover 14 of manhole 10.

In this case, as shown in figure 5, the shell 44 of cooling unit 40 is projected into manhole 10 with heat-sink unit 43 together Lid 12 top, and hood 44a is disposed thereon portion.) formed in the form of through-hole, and the setting of blower fan 45 exists The lower section of hood 44a, and the air in shell 44 is absorbed to allow hood 44a by externally discharged, heat is released It puts.

It is also clear that the lid 12 of manhole 10 is provided with the connection holes (not shown) for being equipped with collets 41, and Connection above connection holes is to protect shell 44.It is additionally provided with the protection shell (not shown) for receiving hole, and the guarantor Protective case body has the multiple ventilation hole (not shown) formed on side and the other side, to allow the heat dissipation of discharge to manhole 10 outside.At this point, venthole (not shown) is formed on top, so that foreign matter and rainwater are easy to pass through.

It is described, but is not limited to the above embodiments referring to the preferred embodiment of the present invention above, the present invention Those of ordinary skill in the art can be described by above embodiments in the case where not departing from present subject matter.It can To realize various changes.

Claims (5)

1. a kind of underground rectifier is embedded to underground and shape when rectifier to be mounted in the accommodation space 14 of manhole 10 At accommodation space 14, top is opened, and lid 12 is coupled to top closure rectifying part and is accommodated in wherein control unit (50), It controls rectifier and has open top (20)；Lid 30 by keep sealing element 32 air-tightness and shell 20 it is upper Portion's connection, and it is installed in the side of shell 20, and cooling end 40 discharges heat from shell 20 to External Internal；It is constructed It is underground underground rectifier at including: shell 20, which is characterized in that inside is full of the nitrogen higher than atmospheric pressure.

2. according to the method described in claim 1, wherein, the lid 30 is filled with the inside that can fill the shell (20) Filling-valve (34)；Exhaust valve 36, the exhaust valve 36 are opened by the control of controller 50 if necessary, are filled in shell with discharge Nitrogen inside body 20, or when the pressure for being filled above the setting of controller 50 of nitrogen, exhaust valve 36 is automatically opened), further Include: shell 20 it is pressure gauge 22, is used to measure the pressure of the nitrogen of filling so that pressure information is transmitted to controller 50, ground The rectifier of lower installation, it is characterised in that further include one.

3. according to claim 1, cooling unit 40 is a heat insulation 41, it is connected to the side of shell (20)；Heat absorbing part 42 are mounted on collets 41 and protrude into shell 20；Radiating part 43 be mounted on collets 41 and with 42 1 bodily form of endothermic section At with to the external prominent of shell 20, shell 44 is coupled to the side of shell 20, is coupled to heat-sink unit 43, and shape on it It is arranged at the inside for the shell 44 for having hood 44a and a draught fan 45;The rectifier of underground installation, it is characterised in that Including one.

4. underground rectifier according to claim 3, which is characterized in that the underground rectifier is temperature sensor 24, For measuring the temperature inside the shell 20, to transmit the temperature information measured by described control unit 50, temperature controller 60 are connected to controller 50, whether to determine air blower 45 by the temperature information for receiving temperature sensor 24 from controller 50 Operating；The rectifier of underground installation, it is characterised in that further include one.

5. the fixed rectifier in underground according to claim 2 or 4, wherein eventually from described control unit 50 to the movement Any one or more in 100 transmission pressure information of end or temperature information, the nitrogen inputted from the mobile terminal 100 is nitrogen Gas, wireless communication unit 70, for the pressure value inside shell 20 or any one or more in temperature value to be sent to control Unit 50 processed；The rectifier of underground installation, it is characterised in that further include one.