CN105402184A - One-way throttle valve and pilot control oil way - Google Patents
One-way throttle valve and pilot control oil way Download PDFInfo
- Publication number
- CN105402184A CN105402184A CN201511024950.9A CN201511024950A CN105402184A CN 105402184 A CN105402184 A CN 105402184A CN 201511024950 A CN201511024950 A CN 201511024950A CN 105402184 A CN105402184 A CN 105402184A
- Authority
- CN
- China
- Prior art keywords
- valve
- throttle valve
- heat source
- way throttle
- way
- 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
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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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/027—Check valves
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- 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
- F15B21/042—Controlling the temperature of the fluid
Abstract
The invention relates to a pilot control oil way and solves the problem of frequent throttle valve blockage caused by low temperature of hydraulic oil in the pilot control oil way; the invention provides a one-way throttle valve which comprises a valve body, wherein a one-way valve and a throttle valve are arranged in parallel in the valve body, a fluid heat source medium inlet and a fluid heat source medium outlet are formed in the valve body, and a runner from the fluid heat source medium inlet to the fluid heat source medium outlet is arranged in the valve body. In the pilot control oil way, the one-way throttle valve is connected between a pilot valve and the hydraulic-control end of a main valve, and the fluid heat source medium inlet and the fluid heat source medium outlet of the one-way throttle valve are connected with a fluid heat source through pipelines to form a circulation loop. In the pilot control oil way, the one-way throttle valve can be used for heating the valve body in virtue of the fluid heat source on a machine, so as to heat the hydraulic oil in the one-way throttle valve, and throttle valve blockage caused by over low temperature of the hydraulic oil in the one-way throttle valve can be avoided, therefore, the problem of pilot control of the machine during operation in an extremely cold zone can be solved.
Description
Technical field
The present invention relates to a kind of hydraulic element, more particularly, relate to a kind of one-way throttle valve and hydraulic control system.
Background technique
Excavator drives equipment scraper bowl to carry out the constructional engineering machinery of digging operation by hydraulic oil circulation, the multiple job requirement outside digging operation can also be met by replacing equipment simultaneously, therefore the use of excavator is not only confined to building field, has been extended to each engineering field.Excavator is generally made up of traveling gear, swivel gear, operator cabin, equipment, control gear and hydraulic control system, and wherein hydraulic control system is the important component part of engineering machinery, for the various action of excavator provides hydraulic oil.
In existing hydraulic control system, mostly all adopting pilot control, is also the executive component in main valve hydraulic control system, the commutation of pilot valve control bound.Usually one-way throttle valve is connected with between pilot valve and the control end end of main valve, when promotion valve core of main valve moves, hydraulic oil flows to valve core of main valve control end through one-way valve, when main valve plug resets, hydraulic oil refluxes through throttle valve, to realize main valve to the buffering when rapid response controlled and reset.
In guide oil road; be " blind alley " from pilot valve to valve core of main valve control end this section of oil circuit; also i.e. hydraulic oil only transmission of pressure in this section of oil circuit; with the exchange of the hydraulic oil in the hydraulic circuit of outside slowly; therefore when machine uses; the preheating of this section of hydraulic oil is very difficult, often needs the long period that the temperature of this section of hydraulic oil just can be made to reach temperature required for work.But, the work region of hydraulic machinery is more extensive, the weather conditions of each region are different, particularly extremely cold area, when temperature is lower, because the hydraulic oil in this section of oil circuit and hydraulic system exchanges less, therefore the hydraulic oil that this section of oil circuit is total needs to arrive operating temperature and needs machine preheating for a long time, even how long machine preheating all possibly cannot reach operating temperature, when in this section of oil circuit, the temperature of hydraulic oil does not reach operating temperature, its viscosity is larger, by the situation of delayed even blocked primary orifice will be there is during throttle orifice in one-way throttle valve, thus cause that machine operation is abnormal even cannot work.
Summary of the invention
The technical problem to be solved in the present invention is the problem for existing one-way throttle valve cisco unity malfunction at low ambient temperatures, and provides a kind of and have rre-heated, guarantee the one-way throttle valve of normal work at low ambient temperatures and have the pilot control oil circuit of this one-way throttle valve.
The present invention is the technological scheme realizing its object is such: provide a kind of one-way throttle valve, comprise valve body, one-way valve in parallel and throttle valve is provided with in described valve body, it is characterized in that on valve body, be provided with heat source fluid medium inlet and heat source fluid media outlet, in valve body, be provided with the runner from heat source fluid medium inlet to heat source fluid media outlet.In the present invention, one-way throttle valve can heat valve body by heat source fluid, thus the temperature of hydraulic oil in one-way throttle valve can be avoided too low and cause the problem of the blocking of throttle valve.
The present invention is another technological scheme realizing its object is such: provide a kind of pilot control oil circuit, comprise pilot valve, main valve, also comprise aforesaid one-way throttle valve and heat source fluid in addition, described one-way throttle valve is connected between the hydraulic control end of described pilot valve and main valve, and heat source fluid medium inlet and the heat source fluid media outlet of described one-way throttle valve are connected to form circulation loop by pipeline and heat source fluid.In the present invention in pilot control oil circuit, one-way throttle valve can heat valve body by the heat source fluid on machine, thus hydraulic oil in one-way throttle valve is heated, the temperature of hydraulic oil in one-way throttle valve can be avoided too low and cause the blocking of throttle valve, thus improving the pilot control problem of machine in the operation of extreme cold area.
In above-mentioned pilot control oil circuit, also comprise controller, for detect described one-way throttle valve body temperature temperature transducer, be arranged on the solenoid valve on connecting pipeline between one-way throttle valve and fluid hydrothermal solution, described temperature transducer is connected with described controller with the automatically controlled end of described solenoid valve, when the temperature that temperature transducer detects is less than default low-temperature values, described controller controls described solenoid valve and is on state, and when the temperature that temperature transducer detects is greater than default low-temperature values, described controller controls described solenoid valve and is in cut-off state.The valve body temperature of one-way throttle valve can be controlled within the specific limits by temperature transducer, controller, solenoid valve etc., consistent with the design work parameter of one-way throttle valve.
In above-mentioned pilot control oil circuit, described heat source fluid is engine-cooling system, and the part cooling liquid in described engine-cooling system flows through described one-way throttle valve through the connecting pipeline between engine-cooling system and one-way throttle valve.In machinery equipment, motor is heater members, cooling liquid in engine-cooling system after the engine started temperature can raise fast, can reach between 80 to 90 degree, part cooling liquid in engine-cooling system is imported in one-way throttle valve the valve body of one-way throttle valve is heated, the valve body temperature of one-way throttle valve can be made to increase fast, thus reach operating temperature fast, reduce the preheat time of pilot control oil circuit.Heat source fluid described in the present invention can also be hydraulic system, and described one-way throttle valve is connected on the fuel tank loop in described hydraulic system.Before machine operation, machine generally all will the process of preheating after engine start, in warm, Engine driven Hydraulic Pump rotates, oil hydraulic pump pumps hydraulic oil, hydraulic oil is in the pumping procedure of oil hydraulic pump, and its temperature also can raise fast, to lead by the road one-way throttle valve through the hydraulic oil of preheating, also can heat the valve body of one-way throttle valve.In hydraulic system, the hydraulic fluid pressure in its fuel tank loop is lower, and one-way throttle valve is connected in the fuel tank loop of hydraulic system, has lower access requirement.
The present invention compared with prior art, in one-way throttle valve in the present invention and pilot control oil circuit, one-way throttle valve can heat valve body by the heat source fluid on machine, thus hydraulic oil in one-way throttle valve is heated, the temperature of hydraulic oil in one-way throttle valve can be avoided too low and cause the blocking of throttle valve, thus improving the pilot control problem of machine in the operation of extreme cold area.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of pilot control oil circuit of the present invention.
Component title and sequence number in figure:
Pilot valve 1, one-way throttle valve 2, temperature transducer 3, main valve 4, hydraulic jack 5, controller 6, solenoid valve 7, engine-cooling system 8.
Embodiment
Below in conjunction with accompanying drawing, specific embodiments is described.
Fig. 1 shows an embodiment of pilot control oil circuit in the present invention, as shown in Figure 1, in pilot control oil circuit in the present embodiment, comprise pilot valve 1, one-way throttle valve 2, temperature transducer 3, main valve 4, controller 6, solenoid valve 7, engine-cooling system 8.Wherein hydraulic jack 5 is connected with the actuator port of main valve 4, one-way throttle valve is connected between the hydraulic control end of pilot valve and main valve, wherein one-way valve is by the hydraulic control end one-way conduction of pilot valve to main valve, and by the position of pilot valve control bound spool, thus the control realizing hydraulic jack controls.
As shown in Figure 1, one-way throttle valve 2 comprises one-way valve and throttle valve, one-way valve and throttle valve parallel connection, the valve body of one-way throttle valve 2 is provided with heat source fluid medium inlet and heat source fluid media outlet, in valve body, is provided with the runner from heat source fluid medium inlet to heat source fluid media outlet.Valve body is provided with the temperature transducer 3 detecting valve body temperature, and temperature transducer 3 is connected with controller 6.Heat source fluid medium inlet on the valve body of one-way throttle valve 2 is connected with engine-cooling system 8 through pipeline with heat source fluid media outlet, and connecting pipeline is provided with solenoid valve 7, and the automatically controlled end of solenoid valve 7 is connected with controller 6.Low-temperature values and high temperature values is preset in controller 6 plug-in, when temperature transducer 3 detects that valve body temperature is less than default low-temperature values Time Controller Controlling solenoid valve 7 and is on state, part flows through one-way throttle valve 2 through connecting pipeline through the engine coolant of heating engines under the water pump of engine-cooling system 8 drives, flow back to engine-cooling system 8 by the road again, so form circulation.Valve body heats when flowing through the valve body of one-way throttle valve 2 by engine coolant, makes one-way throttle valve 2 work in design temperature.The temperature detected when temperature transducer is greater than default low-temperature values Time Controller Controlling solenoid valve and is in cut-off state, thus avoids the temperature of one-way throttle valve too high, exceeds the ideal working temperature scope of one-way throttle valve.
In the present embodiment, one-way throttle valve 2 in pilot control oil circuit by engine-cooling system through the heat source medium of the cooling liquid of heating engines as heat source fluid, valve body is heated, thus the temperature of hydraulic oil in one-way throttle valve can be avoided too low and cause the problem of the blocking of throttle valve.
In the present embodiment, heat source fluid adopts engine-cooling system, in the specific implementation, can also using the hydraulic system of machine as heat source fluid, hydraulic oil, therefore using machine hydraulic system as heat source fluid, can be incorporated in one-way throttle valve in machine operation time control by the temperature of the hydraulic oil in hydraulic system in a more satisfactory operating temperature range, one-way throttle valve is heated to a proper temperature range, one-way throttle valve is normally worked.
Claims (5)
1. an one-way throttle valve, comprise valve body, one-way valve in parallel and throttle valve is provided with in described valve body, it is characterized in that on valve body, be provided with heat source fluid medium inlet and heat source fluid media outlet, in valve body, be provided with the runner from heat source fluid medium inlet to heat source fluid media outlet.
2. a pilot control oil circuit, comprise pilot valve, main valve, characterized by further comprising one-way throttle valve according to claim 1 and heat source fluid, described one-way throttle valve is connected between the hydraulic control end of described pilot valve and main valve, and heat source fluid medium inlet and the heat source fluid media outlet of described one-way throttle valve are connected to form circulation loop by pipeline and heat source fluid.
3. pilot control oil circuit according to claim 2, characterized by further comprising controller, for detecting the temperature transducer of described one-way throttle valve body temperature, be arranged on the solenoid valve between one-way throttle valve and heat source fluid on connecting pipeline, described temperature transducer is all connected with described controller with the automatically controlled end of described solenoid valve, when the temperature that temperature transducer detects is less than default low-temperature values, described controller controls described solenoid valve and is on state, when the temperature that temperature transducer detects is greater than default low-temperature values, described controller controls described solenoid valve and is in cut-off state.
4. the pilot control oil circuit according to Claims 2 or 3, it is characterized in that described heat source fluid is engine-cooling system, the part cooling liquid in described engine-cooling system flows through described one-way throttle valve through the connecting pipeline between engine-cooling system and one-way throttle valve.
5. the pilot control oil circuit according to Claims 2 or 3, it is characterized in that described heat source fluid is hydraulic system, described one-way throttle valve is connected on the fuel tank loop in described hydraulic system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511024950.9A CN105402184A (en) | 2015-12-31 | 2015-12-31 | One-way throttle valve and pilot control oil way |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511024950.9A CN105402184A (en) | 2015-12-31 | 2015-12-31 | One-way throttle valve and pilot control oil way |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105402184A true CN105402184A (en) | 2016-03-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511024950.9A Pending CN105402184A (en) | 2015-12-31 | 2015-12-31 | One-way throttle valve and pilot control oil way |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105402184A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106112322A (en) * | 2016-07-26 | 2016-11-16 | 南京国际船舶设备配件有限公司 | A kind of marine low-speed machine air valve welding robot workstation air-path control system |
| WO2023160245A1 (en) * | 2022-02-28 | 2023-08-31 | 徐州徐工矿业机械有限公司 | Throttling control-based pressure stabilization system for hydraulic excavator, and use method therefor |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4688396A (en) * | 1984-12-05 | 1987-08-25 | Yutaka Takahashi | Air-conditioning hot-water supply device |
| US6571752B1 (en) * | 1999-11-18 | 2003-06-03 | Toyota Jidosha Kabushiki Kaisha | Cooling system and method for an internal combustion engine |
| CN101619580A (en) * | 2009-07-08 | 2010-01-06 | 三一重机有限公司 | Method and device for improving operation comfort of excavator |
| CN201925531U (en) * | 2010-12-21 | 2011-08-10 | 中外合资沃得重工（中国）有限公司 | Heatable one-way throttle valve |
| CN104389713A (en) * | 2014-10-11 | 2015-03-04 | 太原重工股份有限公司 | Engineering crane engine preheating system |
| CN204327660U (en) * | 2014-12-08 | 2015-05-13 | 湖南三一路面机械有限公司 | Engineering machinery and fan cooling system thereof |
| CN104695502A (en) * | 2015-03-13 | 2015-06-10 | 辽宁瑞丰专用车制造有限公司 | Hydraulic system of dual-purpose excavation and shoveling machine |
| CN105114374A (en) * | 2015-07-28 | 2015-12-02 | 广州利沃包装机械有限公司 | Hydraulic system |
-
2015
- 2015-12-31 CN CN201511024950.9A patent/CN105402184A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4688396A (en) * | 1984-12-05 | 1987-08-25 | Yutaka Takahashi | Air-conditioning hot-water supply device |
| US6571752B1 (en) * | 1999-11-18 | 2003-06-03 | Toyota Jidosha Kabushiki Kaisha | Cooling system and method for an internal combustion engine |
| CN101619580A (en) * | 2009-07-08 | 2010-01-06 | 三一重机有限公司 | Method and device for improving operation comfort of excavator |
| CN201925531U (en) * | 2010-12-21 | 2011-08-10 | 中外合资沃得重工（中国）有限公司 | Heatable one-way throttle valve |
| CN104389713A (en) * | 2014-10-11 | 2015-03-04 | 太原重工股份有限公司 | Engineering crane engine preheating system |
| CN204327660U (en) * | 2014-12-08 | 2015-05-13 | 湖南三一路面机械有限公司 | Engineering machinery and fan cooling system thereof |
| CN104695502A (en) * | 2015-03-13 | 2015-06-10 | 辽宁瑞丰专用车制造有限公司 | Hydraulic system of dual-purpose excavation and shoveling machine |
| CN105114374A (en) * | 2015-07-28 | 2015-12-02 | 广州利沃包装机械有限公司 | Hydraulic system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106112322A (en) * | 2016-07-26 | 2016-11-16 | 南京国际船舶设备配件有限公司 | A kind of marine low-speed machine air valve welding robot workstation air-path control system |
| WO2023160245A1 (en) * | 2022-02-28 | 2023-08-31 | 徐州徐工矿业机械有限公司 | Throttling control-based pressure stabilization system for hydraulic excavator, and use method therefor |
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Application publication date: 20160316 |