CN110594242A - Automatic hydraulic oil filtering system of circuit breaker hydraulic mechanism and starting circuit thereof - Google Patents
Automatic hydraulic oil filtering system of circuit breaker hydraulic mechanism and starting circuit thereof Download PDFInfo
- Publication number
- CN110594242A CN110594242A CN201910833096.2A CN201910833096A CN110594242A CN 110594242 A CN110594242 A CN 110594242A CN 201910833096 A CN201910833096 A CN 201910833096A CN 110594242 A CN110594242 A CN 110594242A
- Authority
- CN
- China
- Prior art keywords
- oil
- hydraulic
- valve
- oil pump
- hydraulic mechanism
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses an automatic hydraulic oil filtering system of a hydraulic mechanism of a circuit breaker and a starting circuit thereof, wherein the filtering system comprises a low-pressure oil tank, the upper part of the low-pressure oil tank is provided with an oil inlet, the bottom of the low-pressure oil tank is provided with an oil outlet, the oil inlet is connected with an oil pipe joint, an oil-water separator, a filter, a first valve, an oil filtering pump and a second valve are sequentially connected between the oil pipe joint and the oil outlet through an oil conveying pipeline, the oil conveying pipeline between the first valve and an oil pump is also provided with an oil discharging pipe, and the oil discharging pipe is provided with a third valve; an oil pumping pipe is arranged on the oil conveying pipeline between the oil pump and the second valve, and a fourth valve is arranged on the oil pumping pipe. It need not the oil drain when carrying out the filtration of hydraulic oil, only carries out automatic cycle and filters between low-pressure oil tank and filtration system, easy operation need not the circuit breaker and has a power failure, and filter speed is fast.
Description
Technical Field
The invention relates to the technical field of circuit breakers, in particular to an automatic hydraulic oil filtering system of a circuit breaker hydraulic mechanism and a starting circuit thereof.
Background
The hydraulic mechanism has the advantages of large operating power and stable operation, is generally applied to 220kV and above high-voltage circuit breakers, but has the defects that the pressure of the whole hydraulic mechanism is unstable and needs to be pressed at any time due to the fact that the hydraulic mechanism has higher requirement on the cleanliness of hydraulic oil and even small particles can cause the hydraulic mechanism to be not tightly sealed. Therefore, the hydraulic oil in the hydraulic mechanism needs to be filtered regularly, the hydraulic oil needs to be discharged from the low-pressure oil tank in the traditional method at present, and the hydraulic oil is added into the low-pressure oil tank after the filtering is finished, so that the operation flow is complex, the working efficiency is low, and the power failure time of equipment is long.
Disclosure of Invention
The invention aims to provide an automatic hydraulic oil filtering system of a hydraulic mechanism of a circuit breaker and a starting circuit thereof, which well solve the problems, do not need oil drainage when filtering hydraulic oil, only carry out automatic circulating filtration between a low-pressure oil tank and a filtering system, have simple operation, do not need the circuit breaker to stop power and have high filtering speed.
The technical scheme is that the automatic hydraulic oil filtering system of the hydraulic mechanism of the circuit breaker comprises a low-pressure oil tank, wherein an oil inlet is formed in the upper portion of the low-pressure oil tank, an oil discharge port is formed in the bottom of the low-pressure oil tank, the oil inlet is connected with an oil filling pipe joint, an oil-water separator, a filter, a first valve, an oil filtering pump and a second valve are sequentially connected between the oil filling pipe joint and the oil discharge port through an oil conveying pipeline, an oil discharge pipe is further arranged on the oil conveying pipeline between the first valve and an oil pump, and a third valve is arranged on the oil discharge; an oil pumping pipe is arranged on the oil conveying pipeline between the oil pump and the second valve, and a fourth valve is arranged on the oil pumping pipe.
Furthermore, a fifth valve is arranged on the oil filling pipe joint.
The starting circuit comprises a power supply air switch QF2, a time relay KT2, a manual switch SB, an oil pump starting intermediate relay KM, a hydraulic mechanism oil pump M, a filtering oil pump M2 and a hydraulic mechanism oil pump starting circuit, wherein the hydraulic mechanism oil pump starting circuit is connected with an AI and an A2 coil of the time relay KT2 and 41 and 42 contacts of the oil pump starting intermediate relay KM in parallel.
The invention has the beneficial effects that:
1. according to the invention, the oil inlet and the oil outlet of the low-pressure oil tank are communicated through the oil conveying pipeline, the oil pump is arranged on the oil conveying pipeline to provide power for circulation of hydraulic oil, the filter and the oil-water separator are arranged to respectively filter and separate water from the hydraulic oil, the hydraulic oil in the low-pressure oil tank is purified, the filtering efficiency is high, the hydraulic oil does not need to be discharged from the low-pressure oil tank, but directly flows back into the low-pressure oil tank after being filtered, and the flow is simple;
2. the front end of the oil pump is also provided with an oil discharge pipe, hydraulic oil in the low-pressure oil tank can be directly pumped by the oil pump to be discharged, and compared with the existing hydraulic oil which is discharged from an oil outlet under the action of self gravity, the oil discharge efficiency is greatly improved;
3. an oil pumping pipe is further arranged on the oil conveying pipeline between the oil pump and the second valve, when oil needs to be supplemented to the low-pressure oil tank, the oil pumping pipe can be directly connected with an external oil container, hydraulic oil can be directly pumped from the oil container by the oil pumping pipe under the action of the oil pump and then enters the low-pressure oil tank through the oil inlet, oil can be supplemented quickly, the hydraulic oil can be prevented from being scattered, and the oil pump is environment-friendly and safe;
4. the starting circuit of the hydraulic oil automatic filtering system of the circuit breaker hydraulic mechanism does not change an oil pump starting circuit of a primary hydraulic mechanism, and only a time relay and an oil pump starting relay contact are required to be incorporated into an electrical control loop of a primary oil pump, so that synchronous starting of the oil filtering pump and an oil pump motor can be realized, meanwhile, the oil pump motor continues to work for 7min after stopping and depends on the time relay, and the hydraulic oil in the oil tank can be reliably filtered once.
Drawings
FIG. 1 is a schematic diagram of one embodiment of the present invention;
FIG. 2 is a schematic diagram of a start-up circuit of the present invention;
in the figure: 1. a low-pressure oil tank; 2. an oil inlet; 3. an oil discharge port; 4. an oil filler pipe joint; 5. an oil pipeline; 6. an oil-water separator; 7. a filter; 8. a first valve; 9. an oil pump; 10. a second valve; 11. an oil discharge pipe; 12. a third valve; 13. an oil pumping pipe; 14. a fourth valve; 15. a fifth valve; 16. vacuumizing the joint; 17. a dust plug; 18. a quick coupling.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", etc. indicate orientations or positional relationships based on those shown in the drawings or orientations or positional relationships that the products of the present invention conventionally use, which are merely for convenience of description and simplification of description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention provides a low-pressure oil tank 1 with an automatic hydraulic oil filtering system for a breaker hydraulic mechanism, which comprises a low-pressure oil tank 1, wherein an oil inlet 2 is arranged at the upper part of the low-pressure oil tank 1, an oil outlet 3 is arranged at the bottom of the low-pressure oil tank 1, the oil inlet 2 is connected with an oil filling pipe joint 4, an oil-water separator 6, a filter 7, a first valve 8, an oil pump 9 and a second valve 10 are sequentially connected between the oil filling pipe joint 4 and the oil outlet 3 through an oil conveying pipeline 5, the oil conveying pipeline 5 between the first valve 8 and the oil pump 9 is also provided with an oil discharging pipe 11, and the oil discharging pipe 11 is provided with a third valve 12; an oil pumping pipe 13 is arranged on the oil conveying pipeline 5 between the oil pump 9 and the second valve 10, and a fourth valve 14 is arranged on the oil pumping pipe 13.
After the existing hydraulic mechanism is used for a long time, small particles or metal particle impurities exist in hydraulic oil, the impurities can cause the untight sealing of the hydraulic mechanism and reduce the pressure in the hydraulic mechanism, and in order to ensure the normal use of the hydraulic mechanism, the hydraulic mechanism can be frequently pressurized to ensure that the pressure in the hydraulic mechanism meets the working requirement; after the impurity of hydraulic oil is more, just need to emit the hydraulic oil in the hydraulic pressure mechanism from low-pressure fuel tank 1, then filter the back through special filtration system, add again in low-pressure fuel tank 1, this process is very complicated, and filtration efficiency is low, and causes unrestrained of hydraulic oil easily. On the basis of the low-pressure oil tank 1 of the existing low-pressure oil tank 1, the circulating oil conveying pipeline 5 is additionally arranged, the oil pump 9 is arranged on the oil conveying pipeline 5 to provide power for circulation of hydraulic oil, the filter 7 and the oil-water separator 6 are arranged to respectively filter and separate moisture from the hydraulic oil, the hydraulic oil in the low-pressure oil tank 1 is purified, the filtering efficiency is high, the hydraulic oil does not need to be discharged from the low-pressure oil tank 1, the hydraulic oil directly flows back into the low-pressure oil tank 1 after being filtered, the flow is simple, and the power failure time of the whole circuit breaker device is shortened.
The oil-water separator 6 is connected with the oil filling pipe joint 4 through a quick joint 18. The quick coupling 18 is an existing quick coupling 18 for oil, and the oil-water separator 6 can be conveniently disassembled and assembled.
Still be provided with oil extraction pipe 11 at the front end of oil pump 9, can directly extract the hydraulic oil discharge in the low pressure fuel tank 1 through oil pump 9, compare from the oil-out discharge under the effect of self gravity with current hydraulic oil, great improvement oil extraction efficiency.
The oil pump 9 is a 12V self-priming oil pump, and the 12V self-priming oil pump is small in size and convenient to install and place. The type selection of the oil pump 9 can be selected according to the size of the low-pressure oil tank 1 and the size of the oil conveying pipeline 5, and the oil pump 9 with the small volume is selected as much as possible, so that the oil pump is convenient to place.
The filter 7 is provided with 600-mesh filter paper, the filter paper in the filter 7 can be replaced at any time, the use is convenient, and the mesh number of the filter paper can be replaced by type selection according to the content of impurities in the hydraulic oil or actual requirements.
When the low-pressure oil tank 1 needs to be filtered, the first valve 8 and the second valve 10 are opened, the third valve 12 is closed, and the oil pump 9 is started to circularly pump and filter the hydraulic oil; when the hydraulic oil needs to be discharged, the first valve 8 is closed, the second valve 10 and the third valve 12 are opened, and the oil pump 9 is started, so that the hydraulic oil can be discharged from the oil discharge pipe 11.
The design of oil pumping pipe 13 has increased the oil supplementing function promptly, when needing to mend oil to low-pressure fuel tank 1, can be directly link to each other oil pumping pipe 13 with outside flourishing oil container, under oil pump 9's effect, oil pumping pipe 13 can directly extract hydraulic oil from flourishing oil container, and rethread oil inlet 2 enters into low-pressure fuel tank 1, and the oil supplementing is rapid, can also avoid unrestrained, environmental protection safety of hydraulic oil.
The specific operation process is as follows: and closing the second valve 10 and the third valve 12, opening the fourth valve 14, inserting the oil pumping pipe 13 into the oil container, and starting the oil pump 9, so that the hydraulic oil in the oil container can sequentially pass through the oil pumping pipe 13, the oil pump 9, the first valve 8, the filter 7, the oil-water separator 6 and the oil inlet 2 and enter the low-pressure oil tank 1.
Be provided with fifth valve 15 on the oiling pipe joint 4, when low-pressure fuel tank 1 normally worked, need not loop filter, oil extraction and oil supplementation, can close fifth valve 15, guarantee the pressure in the low-pressure fuel tank 1.
The upper portion of the low-pressure oil tank 1 is also provided with a vacuumizing joint 16, after the low-pressure oil tank 1 is subjected to circulating filtration, oil discharge or oil supplement, if the oil pump 9 extracts air to enter the low-pressure oil tank 1, the pressure in the low-pressure oil tank 1 is influenced, at the moment, a vacuum pump or a pressurizing pump is adopted to be connected with the vacuumizing joint 16, the low-pressure oil tank 1 is vacuumized or pressurized, and the pressure in the low-pressure oil tank 1 meets the requirement.
The end parts of the oil discharge pipe 11 and the oil pumping pipe 13 are both provided with dustproof plugs 17, when the oil discharge pipe 11 and the oil pumping pipe 13 are not used, the dustproof plugs 17 are adopted to block the oil discharge pipe 11 and the oil pumping pipe 13, so that dust, insects and the like are prevented from entering the oil discharge pipe 11 and the oil pumping pipe 13 to pollute the oil discharge pipe 11 and the oil pumping pipe 13, and the dustproof plugs 17 can be rubber plugs or metal plugs connected by threads.
The oil discharge pipe 11 and the oil pumping pipe 13 are both rubber hoses, the shapes of the rubber hoses are changeable, the rubber hoses can be conveniently inserted into an external oil container, and the use is flexible and convenient.
As shown in fig. 2, the invention further provides a starting circuit based on the automatic hydraulic oil filtering system of the hydraulic mechanism of the circuit breaker, which comprises a power supply air switch QF2, a time relay KT2, a manual switch SB, an oil pump starting intermediate relay KM, a hydraulic mechanism oil pump M, a filtering oil pump M2 and a hydraulic mechanism oil pump starting circuit, wherein the hydraulic mechanism oil pump starting circuit is connected in parallel with an AI coil and an a2 coil of the time relay KT2 and contacts 41 and 42 of the oil pump starting intermediate relay KM.
The starting circuit of the filtering oil pump M2 is connected in parallel with the 63 and 64 contacts of the hydraulic mechanism oil pump starting intermediate relay KM and the 15 and 16 contacts of the oil pump starting intermediate relay KM; the time delay time of the time relay is 7min, and after the KM is powered off, the 15 and 16 contacts of the KM can be disconnected in a time delay of 7 min. The AI and A2 coils of the time relay KT2 and the 41 and 42 contacts of the oil pump starting intermediate relay KM are connected in series. The manual switch SB resets the filtered oil pump M2 after filtration is complete.
In fig. 2, the left part of the dotted line is the oil pump motor circuit of the existing hydraulic mechanism, and the right part of the dotted line is the newly added circuit of the present invention. QF1 and QF2 are opened in an empty mode, KM oil pumps start an intermediate relay, KT1 and KT2 time relays, kp5 and kp6 are microswitches, M is an oil pump of a hydraulic mechanism, M2 is a filter oil pump, and SB is a manual switch.
And the air switches QF1 and QF2 are switched on, when the KM intermediate relay is electrified and excited, the oil pump M of the hydraulic mechanism is started, the contacts of the KM oil pump starting relays 41 and 42 are disconnected, and the time relay KT2 is de-electrified. Meanwhile, the contact points of the KM oil pump starting relays 63 and 64 are switched on, and the filtering oil pump M2 is started to filter hydraulic oil.
When the oil pump M of the hydraulic mechanism is started and pressurized to a rated pressure value, the KM oil pump starts the intermediate relay KM to lose power, the 41 and 42 contacts of the KM intermediate relay are connected, the 63 and 64 contacts of the intermediate relay KM are disconnected, timing is started after the coil A1 and A2 of the time relay KT2 are electrified, meanwhile, the 15 and 16 contacts of the time relay KT2 are connected, the oil filter oil pump M2 is started in an electrified mode, the 15 and 16 contacts of the KT2 are disconnected after the timing of the time relay reaches 7min, and the oil filter oil pump M2 stops.
When the oil filtering device needs to be manually started, the SB manual switch is pressed, the filtering oil pump M2 is started, and after oil filtering is finished, the SB manual switch is manually pressed to reset, and the filtering oil pump M2 stops.
The present invention is capable of other embodiments, and various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides a circuit breaker hydraulic pressure mechanism hydraulic oil automatic filtration system, includes low-pressure fuel tank (1), low-pressure fuel tank (1) upper portion is provided with oil inlet (2), low-pressure fuel tank (1) bottom is provided with oil drain port (3), its characterized in that: the oil inlet (2) is connected with an oil injection pipe joint (4), an oil-water separator (6), a filter (7), a first valve (8), a filtering oil pump (9) and a second valve (10) are sequentially connected between the oil injection pipe joint (4) and the oil discharge port (3) through an oil conveying pipe (5), the oil conveying pipe (5) between the first valve (8) and the oil pump (9) is further provided with an oil discharge pipe (11), and the oil discharge pipe (11) is provided with a third valve (12); an oil pumping pipe (13) is arranged on the oil conveying pipeline (5) between the oil pump (9) and the second valve (10), and a fourth valve (14) is arranged on the oil pumping pipe (13).
2. The automatic hydraulic oil filtering system for the circuit breaker hydraulic mechanism according to claim 1, characterized in that: the oil-water separator (6) is connected with the oil filling pipe joint (4) through a quick joint (18).
3. The automatic hydraulic oil filtering system for the circuit breaker hydraulic mechanism according to claim 1, characterized in that: and a fifth valve (15) is arranged on the oil filling pipe joint (4).
4. The automatic hydraulic oil filtering system for the circuit breaker hydraulic mechanism according to claim 1, characterized in that: the end parts of the oil discharge pipe (11) and the oil pumping pipe (13) are provided with dustproof plugs (17).
5. The automatic hydraulic oil filtering system for the circuit breaker hydraulic mechanism according to claim 1, characterized in that: the oil discharge pipe (11) and the oil pumping pipe (13) are both rubber hoses.
6. The automatic hydraulic oil filtering system for the circuit breaker hydraulic mechanism according to claim 2, characterized in that: the oil filtering pump (9) is a 12V self-suction oil pump (9), and 600-mesh filter paper is arranged in the filter (7).
7. A starting circuit of the automatic hydraulic oil filtering system of the hydraulic mechanism of the circuit breaker based on the claims 1-6 is characterized in that: the automatic starting device comprises a power supply air switch QF2, a time relay KT2, a manual switch SB, an oil pump starting intermediate relay KM, a hydraulic mechanism oil pump M, a filtering oil pump M2 and a hydraulic mechanism oil pump starting circuit, wherein AI and A2 coils of the time relay KT2 and 41 and 42 contacts of the oil pump starting intermediate relay KM are connected to the hydraulic mechanism oil pump starting circuit in parallel.
8. The starting circuit of the automatic hydraulic oil filtering system of the circuit breaker hydraulic mechanism according to claim 7, characterized in that: the starting circuit of the filtering oil pump M2 is connected in parallel with the 63 and 64 contacts of the hydraulic mechanism oil pump starting intermediate relay KM and the 15 and 16 contacts of the oil pump starting intermediate relay KM; the time delay time of the time relay is 7min, and after the KM is powered off, the 15 and 16 contacts of the KM can be disconnected in a time delay of 7 min.
9. The starting circuit of the automatic hydraulic oil filtering system of the circuit breaker hydraulic mechanism according to claim 7, characterized in that: the AI and A2 coils of the time relay KT2 and the 41 and 42 contacts of the oil pump starting intermediate relay KM are connected in series.
10. The starting circuit of the automatic hydraulic oil filtering system of the circuit breaker hydraulic mechanism according to claim 7, characterized in that: the manual switch SB resets the filtered oil pump M2 after filtration is complete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910833096.2A CN110594242A (en) | 2019-09-04 | 2019-09-04 | Automatic hydraulic oil filtering system of circuit breaker hydraulic mechanism and starting circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910833096.2A CN110594242A (en) | 2019-09-04 | 2019-09-04 | Automatic hydraulic oil filtering system of circuit breaker hydraulic mechanism and starting circuit thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110594242A true CN110594242A (en) | 2019-12-20 |
Family
ID=68857573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910833096.2A Pending CN110594242A (en) | 2019-09-04 | 2019-09-04 | Automatic hydraulic oil filtering system of circuit breaker hydraulic mechanism and starting circuit thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110594242A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112412929A (en) * | 2020-11-09 | 2021-02-26 | 中国南方电网有限责任公司超高压输电公司昆明局 | Automatic cleaning device for hydraulic disc spring mechanism of high-voltage circuit breaker |
| CN112727854A (en) * | 2020-12-25 | 2021-04-30 | 湖南中铁五新重工有限公司 | Hydraulic oil pipe explosion-proof oil injection device and hydraulic system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201426106Y (en) * | 2009-05-14 | 2010-03-17 | 宝山钢铁股份有限公司 | Starting and running control device for electromotor |
| CN205324160U (en) * | 2015-12-10 | 2016-06-22 | 佛山市绿建环保科技有限公司 | Mud that remote control manual control had concurrently divides sand machine |
| CN107269630A (en) * | 2017-07-28 | 2017-10-20 | 新兴铸管股份有限公司 | A kind of hydraulic station oil changing device |
| CN108097988A (en) * | 2016-11-24 | 2018-06-01 | 李福来 | A kind of C650 types horizontal lathe electric control system |
| CN208078925U (en) * | 2018-05-04 | 2018-11-09 | 石狮市酷瑞电气有限责任公司 | Fire pump auto-coupling voltage-reduction starting circuit |
-
2019
- 2019-09-04 CN CN201910833096.2A patent/CN110594242A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201426106Y (en) * | 2009-05-14 | 2010-03-17 | 宝山钢铁股份有限公司 | Starting and running control device for electromotor |
| CN205324160U (en) * | 2015-12-10 | 2016-06-22 | 佛山市绿建环保科技有限公司 | Mud that remote control manual control had concurrently divides sand machine |
| CN108097988A (en) * | 2016-11-24 | 2018-06-01 | 李福来 | A kind of C650 types horizontal lathe electric control system |
| CN107269630A (en) * | 2017-07-28 | 2017-10-20 | 新兴铸管股份有限公司 | A kind of hydraulic station oil changing device |
| CN208078925U (en) * | 2018-05-04 | 2018-11-09 | 石狮市酷瑞电气有限责任公司 | Fire pump auto-coupling voltage-reduction starting circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112412929A (en) * | 2020-11-09 | 2021-02-26 | 中国南方电网有限责任公司超高压输电公司昆明局 | Automatic cleaning device for hydraulic disc spring mechanism of high-voltage circuit breaker |
| CN112727854A (en) * | 2020-12-25 | 2021-04-30 | 湖南中铁五新重工有限公司 | Hydraulic oil pipe explosion-proof oil injection device and hydraulic system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110594242A (en) | Automatic hydraulic oil filtering system of circuit breaker hydraulic mechanism and starting circuit thereof | |
| CN208495246U (en) | A kind of power battery formation cabinet self-stripping unit | |
| CN201560942U (en) | Electric control system for screw compressor | |
| CN104842985A (en) | Air pressure brake air-supplying control device and light bus | |
| CN206921622U (en) | A kind of on-line automatic oil-filtering apparatus of on-load tap changers of transformers | |
| CN108083220B (en) | Intelligent integral main transformer conservator charges oiling machine | |
| CN204204729U (en) | Power circuit breaker hydraulic mechanism hydraulic oil depassing unit | |
| CN201747577U (en) | Water pump automatic vacuum magnetic controller | |
| CN202992648U (en) | Totally no-oil SF6 gas recovery inflation device | |
| CN2856476Y (en) | Noiseless high efficiency gas compressor | |
| CN206129538U (en) | Air compressor machine lubricating oil system of two oil filter automatic switch -overs | |
| CN103511832A (en) | Whole-series oil-free SF6 gas recovering and filling device | |
| CN202900677U (en) | High-efficient anti-explosion pneumatic self-priming pump | |
| CN203023079U (en) | Intelligent self-priming pump circuit structure | |
| CN203162509U (en) | Automatic oil-exchange cleaning filling machine of motor vehicle power steering engine lubrication system | |
| CN203023056U (en) | Air compressor | |
| CN202541907U (en) | Control circuit for vacuum packaging machine | |
| CN205779620U (en) | Hydraulic system oil pump testing circuit | |
| CN204532848U (en) | Circulating water pump Automatic-bleeding water diversion apparatus | |
| CN204527181U (en) | Compression air brake air supply controller and light bus | |
| CN208381753U (en) | Electronic aeration valve | |
| CN202630541U (en) | Fully automatic four-mouth recycling machine | |
| CN206487695U (en) | A kind of minimum differential pressure type oil pump combination valve | |
| CN206429460U (en) | Multiple tube tank mounting | |
| CN220956727U (en) | Gearbox oil change machine control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for 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: 20191220 |