CN104179952A - Automatic drilling tool throwing device - Google Patents

Automatic drilling tool throwing device Download PDF

Info

Publication number
CN104179952A
CN104179952A CN201410442681.7A CN201410442681A CN104179952A CN 104179952 A CN104179952 A CN 104179952A CN 201410442681 A CN201410442681 A CN 201410442681A CN 104179952 A CN104179952 A CN 104179952A
Authority
CN
China
Prior art keywords
oil
outlet
fuel tank
platform
oil pump
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201410442681.7A
Other languages
Chinese (zh)
Inventor
赵蕾
刘晓路
姚金良
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tianjin Feima Crane Rigging Co Ltd
Original Assignee
Tianjin Feima Crane Rigging Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tianjin Feima Crane Rigging Co Ltd filed Critical Tianjin Feima Crane Rigging Co Ltd
Priority to CN201410442681.7A priority Critical patent/CN104179952A/en
Publication of CN104179952A publication Critical patent/CN104179952A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/04Features relating to lubrication or cooling or heating
    • F16H57/05Features relating to lubrication or cooling or heating of chains
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/04Features relating to lubrication or cooling or heating
    • F16H57/0434Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H2700/00Transmission housings and mounting of transmission components therein; Cooling; Lubrication; Flexible suspensions, e.g. floating frames
    • F16H2700/02Transmissions, specially for working vehicles

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)

Abstract

The invention provides an automatic drilling tool throwing device. A lubricating system is composed of an oil tank, an oil pump and a three-way switch. An oil outlet of the oil tank is connected with the inlet end of the oil pump, and the outlet end of the oil pump is connected with the inlet end of the three-way switch. The three-way switch comprises a first outlet and a second outlet, the first outlet is connected with a transmission chain, and a second switch is connected with an oil inlet of the oil tank. The automatic drilling tool throwing device has the advantage that the oil pump is connected with the transmission chain through the three-way switch, the oil pump is started when a device works, the three-way switch is opened to the first outlet position, lubricating oil reaches the transmission chain to lubricate the transmission chain, the three-way switch is opened to the second outlet position when the lubricating achieves the certain effect, and the lubricating oil flows back into the oil tank. The automatic drilling tool throwing device saves lubricating cost, and does not pollute the ground. An oil tank sewage discharging port is arranged at the bending position of the base plate, and grease can be drained completely. Due to the fact that a programmable logic controller (PLC) control device and an oil quantity sensor are arranged, labor of workers is reduced, the cost is reduced, and automatic lubricating is achieved.

Description

Automatically get rid of drilling rig
Technical field
The present invention relates to oil-well rig field, automatically get rid of drilling rig more specifically to one.
Background technique
It is that to adopt electricity, liquid, gas be power that oil-well rig gets rid of drilling rig automatically, is realized and is got rid of drilling tool work object by mechanical transmission.Can realize supporting with the oil-well rig of each type.This device is designed with manual wired operation and two kinds of modes of ARC Automatic Remote Control intellectualized operation.Realize safety, quick, stable, get rid of drilling tool operation overall process efficiently.This device control apparatus loop all adopts trouble free service voltage 24v, and major loop is provided with earth leakage circuit-breaker, has ensured to the utmost operator's Electrical Safety.Source of the gas adopts rig compressed air gas source, without configuration separately.Gas circuit pipeline adopts steel pipe and PU pipe.Adopt self sealing quick inserting joint at runway joint, effectively prevent that dust from entering air-channel system.Control circuit configuration adopts aviation circuit plug, and dismounting is very convenient.Air-channel system is provided with electronics self-draining arrangement, effectively prevents that moisture from entering gas circuit pipeline and freezed in winter.
In automatically getting rid of drilling rig, the lubricated of chain is a very important job, the too low and lubricated complicated operation to device interior of common manual application of lubricant efficiency, along with the motion of equipment is lubricated at any time and can pollutes ground, full automatic electronic control can not meet the use of on-the-spot rugged environment.
Summary of the invention
The present invention has overcome deficiency of the prior art, and a kind of drilling rig that automatically gets rid of is provided.
Object of the present invention is achieved by following technical proposals.
Automatically get rid of drilling rig, comprise support and the platform of horizontal positioned, tilted-putted drilling rod ramp and lubricating fitting, described lubricating fitting is arranged on described support and platform, on described support and platform, being provided with can be along described support and the reciprocating dolly of platform upper driving chain, described dolly front end is provided with drilling rod damping device and drill-rod clamping device, described support and platform intermediate portion are provided with can lifting and can be to the turnover panel of any side upset, described support and platform one end are provided with dolly stop device, the platform arranged outside of described dolly stop device has drilling rod ramp, on described drilling rod ramp, being provided with can be along the gear thick stick device sliding on described drilling rod ramp, described lubricating fitting comprises fuel tank, oil pump and three-way cock, described fuel tank oil outlet is connected with described oil pump entry end, described oil pump outlet end is connected with described three-way cock entry end, described three-way cock comprises the first outlet and the second outlet, described the first outlet described drive chain lubricated with needs is connected, described second switch is connected with described fuel tank oiler, described fuel tank bottom is provided with base plate, described base plate is bent into α angle, described fuel tank one side is provided with sewage draining exit, described sewage outfalls setting is in described base plate bending place, described sewage draining exit place is provided with blowdown oil and takes over, described blowdown oil is taken over and is provided with groove, described groove top is provided with the aperture for receiving sump oil, be useful in described fuel tank arranged outside the fuel monitor of observing oil mass in described fuel tank.
The angular range at described α angle is 100-160 °.
Be provided with fuel-quantity transducer in described the first outlet with described drive chain joint, whether described fuel-quantity transducer is lubricated for detection of described drive chain.
The output terminal of described fuel-quantity transducer is connected with the input end of PLC control gear, and an output terminal of described PLC control gear is connected with described the first switch, and another output terminal of described PLC control gear is connected with described second switch.
Beneficial effect of the present invention is: oil pump is connected with equipment upper driving chain by three-way cock, pump start in the time that equipment is worked, three-way cock is opened to the position of the first outlet, now lubricant oil arrives drive chain, drive chain is lubricated, and when lubricating the position that after the effect that reaches predetermined, three-way cock is opened to the second outlet, lubricant oil flows to again in fuel tank, not only save lubricated cost but also can not pollute ground, simultaneously simple to operate; Fuel tank sewage draining exit is positioned over fuel tank side and at oil tank bottom plate bending part, can be by whole the sump oil in fuel tank emptyings; Owing to being provided with PLC control gear, and fuel-quantity transducer, reduce workman's work, reduce cost, realize automation lubricated.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of lubricating fitting in the present invention;
Fig. 3 is the structural representation of lubricating fitting fuel tank in the present invention;
Fig. 4 is the structural representation that in the present invention, in lubricating fitting fuel tank, blowdown oil is taken over.
In figure: 1 is fuel tank, 2 is oil pump, and 3 is three-way cock, and 4 is the first outlet, 5 is the second outlet, and 6 is drive chain, and 7 is base plate, and 8 is sewage draining exit, 9 is oil outlet, and 10 is oiler, and 11 is oil filler, and 12 is the adapter of blowdown oil, 13 is groove, and 14 is fuel monitor, and 15 is support and platform, and 16 is drilling rod ramp, 17 is dolly, and 18 is drilling rod damping device, and 19 is drill-rod clamping device, and 20 is turnover panel, 21 is dolly stop device, and 22 is lubricating fitting, and 23 is gear thick stick device.
Embodiment
Below by specific embodiment, technological scheme of the present invention is further described.
Embodiment 1
Automatically get rid of drilling rig, as shown in Figure 1, comprise support and the platform 15 of horizontal positioned, tilted-putted drilling rod ramp 16 and lubricating fitting 22, lubricating fitting 22 is arranged on support and platform 15, on support and platform 15, being provided with can be along support and the reciprocating dolly 17 of platform 15 upper driving chain, dolly 17 front ends are provided with drilling rod damping device 18 and drill-rod clamping device 19, support and platform 15 intermediate portions are provided with can lifting and can be to the turnover panel 20 of any side upset, support and platform 15 one end are provided with dolly stop device 21, the platform arranged outside of dolly stop device 21 has drilling rod ramp 16, on drilling rod ramp 16, being provided with can be along the gear thick stick device 23 sliding on drilling rod ramp 16, as shown in Figure 2, lubricating fitting 22 comprises fuel tank 1, oil pump 2 and three-way cock 3, fuel tank 1, oil pump 2 and three-way cock 3 are arranged on support and platform one side, fuel tank 1 oil outlet 9 is connected with oil pump 2 entry ends, oil pump 2 outlet end are connected with three-way cock 3 entry ends, three-way cock 3 comprises the first outlet 4 and the second outlet 5, the first outlet 4 drive chains 6 lubricated with needs are connected, second switch 5 is connected with fuel tank 1 oiler 10, as shown in Figure 3 and Figure 4, fuel tank 1 bottom is provided with base plate 7, base plate 7 is bent into 100 °, fuel tank 1 one sides are provided with sewage draining exit 8, sewage draining exit 8 is arranged on base plate 7 bending places, sewage draining exit 8 places are provided with blowdown oil and take over 12, fuel tank 1 top is provided with oil filler 11, blowdown oil is taken on 12 and is provided with groove 13, groove 13 tops are provided with the aperture for receiving sump oil, be useful on the fuel monitor 14 of observing fuel tank 1 interior oil mass in fuel tank 1 arranged outside.
Embodiment 2
Automatically get rid of drilling rig, as shown in Figure 1, comprise support and the platform 15 of horizontal positioned, tilted-putted drilling rod ramp 16 and lubricating fitting 22, lubricating fitting 22 is arranged on support and platform 15, on support and platform 15, being provided with can be along support and the reciprocating dolly 17 of platform 15 upper driving chain, dolly 17 front ends are provided with drilling rod damping device 18 and drill-rod clamping device 19, support and platform 15 intermediate portions are provided with can lifting and can be to the turnover panel 20 of any side upset, support and platform 15 one end are provided with dolly stop device 21, the platform arranged outside of dolly stop device 21 has drilling rod ramp 16, on drilling rod ramp 16, being provided with can be along the gear thick stick device 23 sliding on drilling rod ramp 16, as shown in Figure 2, lubricating fitting 22 comprises fuel tank 1, oil pump 2 and three-way cock 3, fuel tank 1, oil pump 2 and three-way cock 3 are arranged on support and platform one side, fuel tank 1 oil outlet 9 is connected with oil pump 2 entry ends, oil pump 2 outlet end are connected with three-way cock 3 entry ends, three-way cock 3 comprises the first outlet 4 and the second outlet 5, the first outlet 4 drive chains 6 lubricated with needs are connected, second switch 5 is connected with fuel tank 1 oiler 10, as shown in Figure 3 and Figure 4, fuel tank 1 bottom is provided with base plate 7, base plate 7 is bent into 130 °, fuel tank 1 one sides are provided with sewage draining exit 8, sewage draining exit 8 is arranged on base plate 7 bending places, sewage draining exit 8 places are provided with blowdown oil and take over 12, fuel tank 1 top is provided with oil filler 11, blowdown oil is taken on 12 and is provided with groove 13, groove 13 tops are provided with the aperture for receiving sump oil, be useful on the fuel monitor 14 of observing fuel tank 1 interior oil mass in fuel tank 1 arranged outside.
Be provided with fuel-quantity transducer in the first outlet 4 with drive chain 6 joints, whether fuel-quantity transducer is for detection of lubricated on drive chain.
The output terminal of fuel-quantity transducer is connected with the input end of PLC control gear, and an output terminal of PLC control gear is connected with the first switch 4, and another output terminal of PLC control gear is connected with second switch 5.
The working procedure of the present embodiment is: fuel-quantity transducer is set to the highest predefined value of an oil mass and oil mass minimum predetermined value, when fuel-quantity transducer reaches oil mass minimum predetermined value, to PLC controller input end output signal, PLC controller one output terminal control three-way cock opens to the position of the first outlet, and drive chain is lubricated; When fuel-quantity transducer reaches the highest predefined value of oil mass, to PLC controller input end output signal, another output terminal control three-way cock of PLC controller opens to the position of the second outlet, lubricant oil in pipeline is returned in fuel tank again, so not only saved lubricated cost but also can not pollute ground, simultaneously simple to operate.
Embodiment 3
Automatically get rid of drilling rig, as shown in Figure 1, comprise support and the platform 15 of horizontal positioned, tilted-putted drilling rod ramp 16 and lubricating fitting 22, lubricating fitting 22 is arranged on support and platform 15, on support and platform 15, being provided with can be along support and the reciprocating dolly 17 of platform 15 upper driving chain, dolly 17 front ends are provided with drilling rod damping device 18 and drill-rod clamping device 19, support and platform 15 intermediate portions are provided with can lifting and can be to the turnover panel 20 of any side upset, support and platform 15 one end are provided with dolly stop device 21, the platform arranged outside of dolly stop device 21 has drilling rod ramp 16, on drilling rod ramp 16, being provided with can be along the gear thick stick device 23 sliding on drilling rod ramp 16, as shown in Figure 2, lubricating fitting 22 comprises fuel tank 1, oil pump 2 and three-way cock 3, fuel tank 1, oil pump 2 and three-way cock 3 are arranged on support and platform one side, fuel tank 1 oil outlet 9 is connected with oil pump 2 entry ends, oil pump 2 outlet end are connected with three-way cock 3 entry ends, three-way cock 3 comprises the first outlet 4 and the second outlet 5, the first outlet 4 drive chains 6 lubricated with needs are connected, second switch 5 is connected with fuel tank 1 oiler 10, as shown in Figure 3 and Figure 4, fuel tank 1 bottom is provided with base plate 7, base plate 7 is bent into 160 °, fuel tank 1 one sides are provided with sewage draining exit 8, sewage draining exit 8 is arranged on base plate 7 bending places, sewage draining exit 8 places are provided with blowdown oil and take over 12, fuel tank 1 top is provided with oil filler 11, blowdown oil is taken on 12 and is provided with groove 13, groove 13 tops are provided with the aperture for receiving sump oil, be useful on the fuel monitor 14 of observing fuel tank 1 interior oil mass in fuel tank 1 arranged outside.
Be provided with fuel-quantity transducer in the first outlet 4 with drive chain 6 joints, whether fuel-quantity transducer is for detection of lubricated on drive chain.
The output terminal of fuel-quantity transducer is connected with the input end of PLC control gear, and an output terminal of PLC control gear is connected with the first switch 4, and another output terminal of PLC control gear is connected with second switch 5.
Above three embodiments of the present invention are had been described in detail, but described content is only preferred embodiment of the present invention, can not be considered to for limiting practical range of the present invention.All equalization variation and improvement etc. of doing according to the present patent application scope, within all should still belonging to patent covering scope of the present invention.

Claims (4)

1. automatically get rid of drilling rig, comprise support and the platform of horizontal positioned, tilted-putted drilling rod ramp and lubricating fitting, described lubricating fitting is arranged on described support and platform, on described support and platform, being provided with can be along described support and the reciprocating dolly of platform upper driving chain, described dolly front end is provided with drilling rod damping device and drill-rod clamping device, described support and platform intermediate portion are provided with can lifting and can be to the turnover panel of any side upset, described support and platform one end are provided with dolly stop device, the platform arranged outside of described dolly stop device has drilling rod ramp, on described drilling rod ramp, being provided with can be along the gear thick stick device sliding on described drilling rod ramp, it is characterized in that: described lubricating fitting comprises fuel tank, oil pump and three-way cock, described fuel tank oil outlet is connected with described oil pump entry end, described oil pump outlet end is connected with described three-way cock entry end, described three-way cock comprises the first outlet and the second outlet, described the first outlet described drive chain lubricated with needs is connected, described second switch is connected with described fuel tank oiler, described fuel tank bottom is provided with base plate, described base plate is bent into α angle, described fuel tank one side is provided with sewage draining exit, described sewage outfalls setting is in described base plate bending place, described sewage draining exit place is provided with blowdown oil and takes over, described blowdown oil is taken over and is provided with groove, described groove top is provided with the aperture for receiving sump oil, be useful in described fuel tank arranged outside the fuel monitor of observing oil mass in described fuel tank.
2. the drilling rig that automatically gets rid of according to claim 1, is characterized in that: the angular range at described α angle is 100-160 °.
3. the drilling rig that automatically gets rid of according to claim 1, is characterized in that: be provided with fuel-quantity transducer in described the first outlet with described drive chain joint, whether described fuel-quantity transducer is lubricated for detection of described drive chain.
4. the drilling rig that automatically gets rid of according to claim 3, it is characterized in that: the output terminal of described fuel-quantity transducer is connected with the input end of PLC control gear, one output terminal of described PLC control gear is connected with described the first switch, and another output terminal of described PLC control gear is connected with described second switch.
CN201410442681.7A 2014-09-02 2014-09-02 Automatic drilling tool throwing device Pending CN104179952A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410442681.7A CN104179952A (en) 2014-09-02 2014-09-02 Automatic drilling tool throwing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410442681.7A CN104179952A (en) 2014-09-02 2014-09-02 Automatic drilling tool throwing device

Publications (1)

Publication Number Publication Date
CN104179952A true CN104179952A (en) 2014-12-03

Family

ID=51961208

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410442681.7A Pending CN104179952A (en) 2014-09-02 2014-09-02 Automatic drilling tool throwing device

Country Status (1)

Country Link
CN (1) CN104179952A (en)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0470900A1 (en) * 1990-08-09 1992-02-12 Consortium De Recherches Pour L'application Des Fluides, Craf Method of and device for lubricating a chain
DE4406099A1 (en) * 1994-02-25 1995-08-31 Bielomatik Leuze & Co Automatic lubricating system for chain transmission
CN201013271Y (en) * 2007-03-26 2008-01-30 南阳二机石油装备(集团)有限公司 Fully-hydraulic drilling rod bleeder
CN201149157Y (en) * 2007-12-14 2008-11-12 青铜峡铝业集团有限公司 Chain special-purpose lubricating device
CN202215718U (en) * 2011-08-22 2012-05-09 成都利君实业股份有限公司 A reduction box lubricating system
CN202531499U (en) * 2012-03-13 2012-11-14 启东市南方润滑液压设备有限公司 Fuel tank dirt drain outlet
CN202627991U (en) * 2012-06-11 2012-12-26 东营市鸿达石油设备制造厂 Device for automatically laying down drill pipes
CN102926685A (en) * 2012-11-23 2013-02-13 吉林大学 All-hydraulic automatic drilling tool conveying device for deep-well drilling rig
CN202866692U (en) * 2012-08-01 2013-04-10 中国石油化工股份有限公司 Petroleum drilling tool ramp transferring device
CN204312678U (en) * 2014-09-02 2015-05-06 天津市飞马起重吊索具有限公司 Automatically drilling rig is got rid of

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0470900A1 (en) * 1990-08-09 1992-02-12 Consortium De Recherches Pour L'application Des Fluides, Craf Method of and device for lubricating a chain
DE4406099A1 (en) * 1994-02-25 1995-08-31 Bielomatik Leuze & Co Automatic lubricating system for chain transmission
CN201013271Y (en) * 2007-03-26 2008-01-30 南阳二机石油装备(集团)有限公司 Fully-hydraulic drilling rod bleeder
CN201149157Y (en) * 2007-12-14 2008-11-12 青铜峡铝业集团有限公司 Chain special-purpose lubricating device
CN202215718U (en) * 2011-08-22 2012-05-09 成都利君实业股份有限公司 A reduction box lubricating system
CN202531499U (en) * 2012-03-13 2012-11-14 启东市南方润滑液压设备有限公司 Fuel tank dirt drain outlet
CN202627991U (en) * 2012-06-11 2012-12-26 东营市鸿达石油设备制造厂 Device for automatically laying down drill pipes
CN202866692U (en) * 2012-08-01 2013-04-10 中国石油化工股份有限公司 Petroleum drilling tool ramp transferring device
CN102926685A (en) * 2012-11-23 2013-02-13 吉林大学 All-hydraulic automatic drilling tool conveying device for deep-well drilling rig
CN204312678U (en) * 2014-09-02 2015-05-06 天津市飞马起重吊索具有限公司 Automatically drilling rig is got rid of

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
寇红涛 等: "液压动力钻杆排放猫道设计与应用", 《石油机械》 *
尹晓丽 等: "钻杆自动传送系统及设计方案", 《石油矿场机械》 *
张艳敏 等: "水平/垂直钻杆自动操作系统及设计方案", 《石油矿场机械》 *

Similar Documents

Publication Publication Date Title
CN202545207U (en) Intelligent variable-frequency control fracturing pump set
CN204357560U (en) The lubricious cleaning systems machine of a kind of motor car engine
CN201650697U (en) Underground fracturing pump set of remote-control coal mine
CN205299037U (en) Mining automatic oiling device
CN104197175A (en) Automatic lubrication device of construction lifter
CN105351378A (en) High-efficiency temperature control grease-injecting device for bearing
CN204312678U (en) Automatically drilling rig is got rid of
CN206130535U (en) Well site oil gas is defeated sled intelligence control system thoughtlessly
CN104179952A (en) Automatic drilling tool throwing device
CN205090173U (en) Appearance is examined to multifunctional machinery equipment on -line point
CN205001485U (en) Middle supporting device of transmission shaft
CN203774651U (en) Overhaul device special for transformer
CN110345366A (en) Lubricator of steel wire ropes low pressure port intercommunicating device
CN104742837A (en) Truck and chassis lubricating system for truck
CN203533164U (en) Lubricating grease level detecting device of graded crusher
CN201155656Y (en) Railway passenger car bearing automatic control grease adding equipment
CN201569551U (en) Multifunctional detection pump station
CN202901778U (en) Novel centralized lubricating system of pitch paver
CN215000874U (en) Remote control fluid delivery system
CN203907184U (en) Movable automatic oiler
CN103822074A (en) Multi-part synchronous centralized lubricating system of large-scale mechanical equipment
CN216715821U (en) Automatic oil injection device for mine
RU155820U1 (en) STAND FOR RINSING THE INTERNAL CAVITY OF THE STATOR OF THE SUBMERSIBLE ELECTRIC MOTOR
CN203998525U (en) Building construction hoist multi-luber
CN202363209U (en) Oil discharging and filling device of transformer

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20141203