CN201678367U - Electric power hydraulic grab bucket with control structure of electromagnetic cartridge valve - Google Patents
Electric power hydraulic grab bucket with control structure of electromagnetic cartridge valve Download PDFInfo
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- CN201678367U CN201678367U CN2010201570156U CN201020157015U CN201678367U CN 201678367 U CN201678367 U CN 201678367U CN 2010201570156 U CN2010201570156 U CN 2010201570156U CN 201020157015 U CN201020157015 U CN 201020157015U CN 201678367 U CN201678367 U CN 201678367U
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Abstract
The utility model relates to mechanical equipment for grabbing and discharging goods and belongs to cranes used in the industries such as ports, docks, steel plants, biomass power generation (rubbish power generation, straw power generation and the like), ships, storage and transportation, and the like. The utility model particularly relates to an electric power hydraulic grab bucket with the control structure of an electromagnetic cartridge valve, which is used on a crane. The grab bucket comprises a grab bucket structural component and an electro-hydraulic device; the electro-hydraulic device comprises a hydraulic cylinder, a quantitative hydraulic pump, an electric motor and a control valve block; the hydraulic pump provides power by depending on the electric motor connected therewith and is connected with and drives a hydraulic cylinder through a valve member arranged in the control valve block; and the utility model is characterized in that the valve member comprises two unloading relief valves CT7 and CT8; and both the unloading relief valves CT7 and CT8 are accessed to the control oil circuit of a logic valve respectively. The utility model has the advantages that both the closing pressure and the opening pressure are adjustable, and the oil pump has the highest pressure protection.
Description
Technical field
The utility model relates to a kind of mechanical equipment that unloads goods of grabbing, belong to hoisting crane: be used for industries such as harbour, harbour, steel mill, biomass power generation (garbage power, straw generating etc.), boats and ships, accumulating, be specifically related to a kind of electric hydraulic bucket with electromagnetic cartridge valve control structure.
Background technology
Electric hydraulic bucket is a kind of grab bucket of self-powered device, hangs on hoisting crane, in order to grasp bulk material.Present domestic existing electric hydraulic bucket, major part are to rely on the mode of electrical motor rotating to control the unlatching of grab bucket with closed.But in recent years, introduced external S. A. or full automatic hoisting crane, be used to grasp the place of rubbish and allogenic material material thereof, its use mostly be the electric hydraulic bucket of solenoid control mode.The hydraulic grab of solenoid control, it is good to have a controller performance, and motor is not easy the advantage of overheated and physical damage, at present domesticly promotes gradually.
The homemade electromagnetic valve modulated pressure grab bucket with import grab bucket peer-level that is used on S. A. or the full automaticity hoisting crane is in development phase, and still amorphous products is introduced to the market.
The hydraulic grab of the imported with original packaging solenoid control that import S. A. hoisting crane uses, the mode of its hydraulic efficiency pressure system has three kinds of versions: a kind of is the structure of general board-like electric liquid direction valve control, as the hydraulic grab (its system's control principle is seen Fig. 1) of external MRS company.Another kind is the hybrid-type structure of electromagnetic priority valve and inserted valve, as the hydraulic grab (its system's control principle is seen Fig. 2) of the controllable capacity pump LS of PEINER company control.The third is the hydraulic grab (its control cock piece principle is seen Fig. 3) of the pure electromagnetic cartridge valve structure of KONE company.
For energy-conservation and reduce the heat-producing purpose of grab bucket hydraulic efficiency pressure system, no matter adopt which kind of mode, at the rock rake lobe closed fully or open after all adopted the control technology of off-load pressurize.What Fig. 1 and Fig. 3 used is fix-displacement pump, relies on unloader valve that delivery side of pump pressure is reduced, and keeps the pressure unmodified mode of oil cylinder to realize what automatic energy saving was controlled by check valve.What Fig. 2 used is controllable capacity pump, is to rely on the LS pressure control, and controllable capacity pump drops to zero to the fuel supply flow rate of oil cylinder and realizes.
That the change-over valve among Fig. 1 uses is the electro-hydraulic reversing valve 4WEH22 of plank frame 22 latus rectums, and the meta of valve has unloading function.After the pilot solenoid valve commutation, the main valve plug of electro-hydraulic reversing valve must have certain guide oil pressure to promote.For this reason, an essential built-in precompression valve produces the pressure reduction that is not less than 4.5bar in the oil inlet P of this valve, and the operating pressure of main valve is provided.This pressure reduction produces the heating power of 0.69KW under 91.4 lpm flows of Hydraulic Pump PUMP output, also be to cause one of heat-producing reason of system.Owing to the otherwise reason of hydraulic efficiency pressure system, in fact the heating power when off-load is also much larger than this value.In addition; the hydraulic grab of this control system has only a pressure valve that is subjected to the band unloading function of A mouth control, and the closing pressure of grab bucket and response pressure can not be adjustable respectively; oil cylinder stressed unreasonable, having the oil pump top pressure to lack safety guard-safeguard etc. more all is weak point.
Fig. 2 is a kind of variable pump systems of LS mode, has realized that pressurize variations per hour pump PUMP is zero controlled target to hydraulic actuating cylinder CL fuel supply flow rate, needs certain control oil stream to keep the function of controllable capacity pump variable PUMP but exist LS control system itself.According to the technical materials that the PV63 of PARKER company controllable capacity pump LS mode provides, the control oil flow during the 230bar operation pressure and the total flow of controllable capacity pump internal leakage are about 6lpm, and this moment, the heating power of system was about 2.3KW.The operation pressure of this system is regulated by DV1 and DV2 respectively, can realize that the closing pressure and the response pressure of grabbing bucket are adjustable respectively.In the control cock piece, WV1 and WV2 are subbase mounted pilot solenoid valve, and all the other are the inserted valve of discrete component.
What Fig. 3 adopted is the control system of electromagnetic cartridge valve structure, and its system's cal val is few, element be convenient to change and maintenance cost low, be its significant advantage.But there is also have only a guide unloading overflow valve 13 similar to Fig. 1,2/2-way electromagnetic valve 14 is the priority valves when grab bucket is in readiness for action, with the discharge degree of pump.Valve 13,14 and logical valve 15 have been formed the unloader valve of quantitative oil pump.Owing to have only a unloader valve, the closing pressure of grab bucket and response pressure can not be adjustable respectively, oil cylinder stressed unreasonable.If guide's unloading overflow valve 13 lost efficacy, then the top pressure of oil pump and hydraulic efficiency pressure system lacks safety guard-safeguard.
Summary of the invention
The purpose of this utility model is according to above-mentioned the deficiencies in the prior art part; provide that a kind of to have a closing pressure, response pressure adjustable respectively, oil pump has the multiple functional electric hydraulic buckets with electromagnetic cartridge valve control structure of fluid control such as top pressure protection.
The utility model purpose realizes being finished by following technical scheme:
A kind of electric hydraulic bucket with electromagnetic cartridge valve control structure, be used for hoisting crane, this grab bucket comprises grab bucket framing member and electro hydraulic gear, described electro hydraulic gear includes hydraulic actuating cylinder, quantitative hydraulic pump, electrical motor and control cock piece, described Hydraulic Pump relies on connected electrical motor that power is provided, and by being arranged at the valve member connection in the described control cock piece, drive described hydraulic actuating cylinder, it is characterized in that: described valve member includes two unloading overflow valve CT7, CT8, described unloading overflow valve CT7, CT8 is by two solenoid directional control valve CT9, CT10 is linked into the control oil channel of a logical valve respectively.
Be provided with precursor overflow valve in the described control cock piece and control described logical valve, to limit the top pressure of described Hydraulic Pump.
Described valve member also comprises two main solenoid valves, two check valves and two balance cocks, the oil inlet of described logical valve and two main solenoid valves is communicated with described quantitative hydraulic pump, described main solenoid valve oil outlet respectively with a check valve oil inlet, one balance cock control mouthful connection, the oil outlet of described check valve is communicated with a hydraulic actuating cylinder and a balance cock oil inlet respectively, described balance cock oil outlet is communicated with a described logical valve oil outlet and an oil return oil filter respectively, described logical valve control mouth is communicated with the oil inlet of unloading overflow valve oil inlet CT7 and solenoid directional control valve CT9 respectively, solenoid directional control valve CT9 oil outlet is communicated with solenoid directional control valve CT10 oil inlet respectively, unloading overflow valve CT7 oil outlet and unloading overflow valve CT8 oil inlet, solenoid directional control valve CT10 oil outlet is communicated with unloading overflow valve CT8 oil outlet, described unloading overflow valve CT7, the control mouth of CT8 is communicated with hydraulic actuating cylinder.
Described valve member comprises a precursor overflow valve, and described precursor overflow valve oil inlet is communicated with the oil outlet of described logical valve, and its oil outlet is communicated with the oil outlet of two balance cocks.
Described at least one solenoid directional control valve can adopt shuttle valve to substitute.
Described at least one balance cock can adopt hydraulic control one-way valve to substitute.
Described valve member is plugged on the described control valve member by thread seal.
The utility model has the advantages that: the unlatching of grab bucket, when closure puts in place, used separately independently two off-load overflow priority valves, can control respectively grab bucket closed with the pressure of opening, realize unloading function simultaneously automatically.When losing efficacy appears in above-mentioned unloading overflow valve, define the top pressure of Hydraulic Pump by an independent precursor overflow valve, hydraulic efficiency pressure system and oil pump have been played the effect of safety guard-safeguard.When grab bucket was not worked, by the control of electromagnetic valve, hydraulic efficiency pressure system automatic deloading had reduced heating.The control cock piece can also be installed the balance cock of hydraulic ram maximum working pressure, and oil cylinder and associated mechanical part are carried out safety guard-safeguard.After rationally selecting various inserted valves for use, the cal val of hydraulic efficiency pressure system has dropped to minimum level, has improved the life-span and the reliability of hydraulic efficiency pressure system.
Description of drawings
The hydraulic grab system of the board-like solenoid control of Fig. 1 MRS;
The hydraulic grab system of the solenoid control of Fig. 2 PEINER mixed system;
The valve piece of Fig. 3 KONE inserted valve structure solenoid control hydraulic grab;
The hydraulic grab system of a kind of embodiment of Fig. 4 the utility model;
A kind of simplification of Fig. 5 the utility model is the hydraulic grab system of embodiment after changing;
The construction profile of a kind of embodiment control cock of Fig. 6 the utility model piece.
The specific embodiment
The utility model feature and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, so that the understanding of technical personnel of the same trade:
Shown in Fig. 1-6, label is represented respectively: electro-hydraulic reversing valve 4WEH22, pilot solenoid valve WV1, WV2, inserted valve DV1, DV2, DV3, SV1, SV2, RV1, RV2, guide's unloading overflow valve 13,2/2-way electromagnetic valve 14, logical valve 15, electrical motor M, quantitative hydraulic pump PUMP, hydraulic actuating cylinder CL, logical valve CT0, precursor overflow valve CT00, guide's unloading overflow valve CT7, CT8, main solenoid valve CT1, CT2, pilot solenoid valve CT9, CT10, check valve CT3, CT4, balance cock CT5, CT6, hydraulic control one-way valve CT51, CT61, oil pump outlet line P, oil cylinder rodless cavity oil pipe A, cylinder rod chamber oil pipe B, oil return pipe T, control oil leakage pipe Y, oil return oil filter F, cutoff port t1, t2, pressure tap: MP, MA, MB.
Referring to Fig. 4, below will describe control cock block structure and principle of work thereof in the present embodiment in detail.
Work as energized, when electrical motor M as prescribed direction was rotated, quantitative hydraulic pump PUMP was by oil outlet pipe P fuel feeding in control valve body of pump.If this moment each electromagnetic valve equal no power, state as shown in Figure 4 then, grab bucket is in readiness for action.Because the control port of logical valve CT0 successively communicates with control oil leakage pipe Y by CT9, CT10, the control oil stream of valve CT0 does not have pressure, directly gets back to fuel tank.Under the effect of this control oil stream, when the pressure reduction of two of logical valve CT0 main valve plugs reaches setting value (generally being lower than 2bar), logical valve is open-minded, and the flow of pump is to count the pressure of bar, get back to fuel tank by oil pipe T and oil return oil filter F, the effect of low pressure off-load when playing standby.
In electrical control, electromagnetic valve CT1 and CT9 connect simultaneously and cut off the power supply, and during energising, grab bucket is closed.Electromagnetic valve CT2 and CT10 also connect simultaneously and cut off the power supply, and during energising, grab bucket is opened.
When electromagnetic valve CT1 and CT9 energising, the operation grab bucket is closed.Because the commutation of CT9, the control oil circulation of logical valve CT0 is cut off to the oil circuit of Y pipe.The CT0 main valve plug is closed, and pump discharge pressure rises, and the hydraulic oil of P pipe flows to the rodless cavity of oil cylinder CL by oil pipe A through electromagnetic valve CT1, check valve CT3.The pressure of P pipe is by controlling oil duct between CT1 and the CT3 at this moment, arrive balance cock CT6(or hydraulic control one-way valve CT61) the control mouth, make CT6(or CT61) open, this moment, the oil of hydraulic actuating cylinder CL rod chamber can be by valve CT6(or CT61 by oil pipe B) flow to oil return pipe T, pass through oil return oil filter F again and get back in the fuel tank.Realized the overhanging of hydraulic actuating cylinder CL piston rod, driven the motion of pawl lobe, made grab bucket closed.Because CT9 energising back commutation, cut off the directly passage by Y pipe oil sump tank of logical valve CT0 control oil stream, the high output pressure of Hydraulic Pump must be determined by guide's unloading overflow valve CT7 when grab bucket was closed.When the highest closing pressure that the pressure among the delivery side of pump pipe P reaches that valve CT7 sets, the CT7 overflow, flow through CT7 and CT10 of the control oil of logical valve CT0 flows to oil pipe Y and gets back to fuel tank, and CT0 just produces overflow.When oil pipe A reached setting pressure, under the effect of A management and control pressing pressure, guide's unloader valve CT7 opened off-load, and CT0 makes the hydraulic oil of P pipe directly flow to fuel tank, Hydraulic Pump off-load by CT0 through the T pipe by same control oil stream approach.This moment, the pressure of oil pipe P was equally very low, had reduced the heating of hydraulic efficiency pressure system.
In like manner, when electromagnetic valve CT2 and CT10 energising, the operation grab bucket is opened.Because the commutation of CT10, the control oil circulation of logical valve CT0 is cut off to the oil circuit of Y pipe.The CT0 main valve plug is closed, and pump discharge pressure rises, and the hydraulic oil of P pipe flows to the rod chamber of oil cylinder CL by oil pipe B through electromagnetic valve CT2, check valve CT4.The pressure of P pipe is by controlling oil duct between CT2 and the CT4 at this moment, arrive balance cock CT5(or hydraulic control one-way valve CT51) the control mouth, make CT5(or CT51) open, this moment, the oil of hydraulic actuating cylinder CL rodless cavity can be by valve CT5(or CT51 by oil pipe A) flow to oil return pipe T, pass through oil return oil filter F again and get back in the fuel tank.Realized the withdrawal of hydraulic actuating cylinder CL piston rod, driven the motion of pawl lobe, grab bucket is opened.Because CT10 energising back commutation, cut off the directly passage by Y pipe oil sump tank of logical valve CT0 control oil stream, the high output pressure of Hydraulic Pump must be determined by guide's unloading overflow valve CT8 when grab bucket was opened.When the highest response pressure that the pressure among the delivery side of pump pipe P reaches that valve CT8 sets, CT8 opens overflow, and flow through CT9 and CT8 of the control oil of logical valve CT0 flows to oil pipe Y and get back to fuel tank, and CT0 just produces overflow.When oil pipe B reached setting pressure, under the effect of B management and control pressing pressure, guide's unloader valve CT8 opened off-load, and CT0 makes the hydraulic oil of P pipe directly flow to fuel tank, Hydraulic Pump off-load by CT0 through the T pipe by same control oil stream approach.
Because the characteristic of guide's unloading overflow valve CT7, CT8, when the pressure in the oil pipe of oil pipe CL has reduced about 15% (being determined by the pressure reduction rate in the technical parameter of valve) of CT7 or CT8 setting pressure, guide's unloading overflow valve CT7 or CT8 SELF CL, Hydraulic Pump has been realized the function of the automatic pressurising pressurize of hydraulic efficiency pressure system once more to oil pipe A or B fuel feeding.
Two guide's unloader valve CT7, CT8 in the control cock piece of the present utility model are the control by solenoid directional control valve CT9, CT10, be linked into respectively in the control oil channel of logical valve CT0, reached the effect of regulating respectively with the pressure unloading of controlled hydraulic system under two operating modes, overcome the phenomenon that interferes with each other that unloader valve of original external model machine occurs simultaneously when two kinds of operating modes are switched.
Two built-in cutoff ports of t1 in the control cock of the present utility model, t2, in order to prevent hydraulic ram under the effect of external force such as rock rake lobe weight, vibration takes place and establishes in control system.Its aperture is by factory set.Prevented among the MK20 among Fig. 1, Fig. 3 flow regulating valve such as valve 43 because of the user regulates the improper overheated phenomenon of hydraulic efficiency pressure system that produces.
Pressure tap: MP, MA, MB are used for hydraulic efficiency pressure system is monitored and trouble diagnosing usefulness, measure the delivery pressure of oil pump PUMP, the operation pressure usefulness of two oil pockets of oil cylinder respectively.
Above in conjunction with Fig. 4, it is most complete to have described the utility model function, also is a more excellent embodiment.But also can under the situation that reduces indivedual valve members wherein, delete the part controllable function according to condition of service, to reduce the cost of system, referring to Fig. 5, removed precursor overflow valve CT00 among the figure, the function of the qualification Hydraulic Pump top pressure that this valve piece is had also can't realize.
Replace for the function of some valve member simultaneously, as: balance cock can adopt hydraulic control one-way valve to substitute after simplifying the pressure function.Two balance cocks can replace with hydraulic control one-way valve of a balance cock or two hydraulic control one-way valves (equally referring to Fig. 5) in the foregoing description.
Control cock piece of the present utility model can adopt screw-in cartridge valve to be contained on the valve body fully, by corresponding oil duct in the valve body, forms a complete control system.Referring to Fig. 6, the control cock piece shown in the figure promptly is a wherein a kind of outside drawing of control cock piece.
Claims (7)
1. electric hydraulic bucket with electromagnetic cartridge valve control structure, be used for hoisting crane, this grab bucket comprises grab bucket framing member and electro hydraulic gear, described electro hydraulic gear includes hydraulic actuating cylinder, quantitative hydraulic pump, electrical motor and control cock piece, described Hydraulic Pump relies on connected electrical motor that power is provided, and by being arranged at the valve member connection in the described control cock piece, drive described hydraulic actuating cylinder, it is characterized in that: described valve member includes two unloading overflow valve CT7, CT8, described unloading overflow valve CT7, CT8 is by two solenoid directional control valve CT9, CT10 is linked into the control oil channel of a logical valve respectively.
2. a kind of electric hydraulic bucket with electromagnetic cartridge valve control structure according to claim 1 is characterized in that being provided with precursor overflow valve in the described control cock piece controls described logical valve, to limit the top pressure of described Hydraulic Pump.
3. a kind of electric hydraulic bucket according to claim 1 with electromagnetic cartridge valve control structure, it is characterized in that described valve member also comprises two main solenoid valves, two check valves and two balance cocks, the oil inlet of described logical valve and two main solenoid valves is communicated with described quantitative hydraulic pump, described main solenoid valve oil outlet respectively with a check valve oil inlet, one balance cock control mouthful connection, the oil outlet of described check valve is communicated with a hydraulic actuating cylinder and a balance cock oil inlet respectively, described balance cock oil outlet is communicated with a described logical valve oil outlet and an oil return oil filter respectively, described logical valve control mouth is communicated with the oil inlet of unloading overflow valve oil inlet CT7 and solenoid directional control valve CT9 respectively, solenoid directional control valve CT9 oil outlet is communicated with solenoid directional control valve CT10 oil inlet respectively, unloading overflow valve CT7 oil outlet and unloading overflow valve CT8 oil inlet, solenoid directional control valve CT10 oil outlet is communicated with unloading overflow valve CT8 oil outlet, described unloading overflow valve CT7, the control mouth of CT8 is communicated with hydraulic actuating cylinder.
4. a kind of electric hydraulic bucket according to claim 3 with electromagnetic cartridge valve control structure, it is characterized in that described valve member comprises a precursor overflow valve, described precursor overflow valve oil inlet is communicated with the oil outlet of described logical valve, and its oil outlet is communicated with the oil outlet of two balance cocks.
5. according to claim 1,2,3 or 4 described a kind of electric hydraulic buckets, it is characterized in that described at least one solenoid directional control valve can adopt shuttle valve to substitute with electromagnetic cartridge valve control structure.
6. according to claim 3 or 4 described a kind of electric hydraulic buckets, it is characterized in that described at least one balance cock can adopt hydraulic control one-way valve to substitute with electromagnetic cartridge valve control structure.
7. according to claim 3 or 4 described a kind of electric hydraulic buckets, it is characterized in that described valve member is plugged on the described control valve member by thread seal with electromagnetic cartridge valve control structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201570156U CN201678367U (en) | 2010-04-13 | 2010-04-13 | Electric power hydraulic grab bucket with control structure of electromagnetic cartridge valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201570156U CN201678367U (en) | 2010-04-13 | 2010-04-13 | Electric power hydraulic grab bucket with control structure of electromagnetic cartridge valve |
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| Publication Number | Publication Date |
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| CN201678367U true CN201678367U (en) | 2010-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201570156U Expired - Lifetime CN201678367U (en) | 2010-04-13 | 2010-04-13 | Electric power hydraulic grab bucket with control structure of electromagnetic cartridge valve |
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| CN (1) | CN201678367U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101811642A (en) * | 2010-04-13 | 2010-08-25 | 上海昂丰矿机科技有限公司 | Electro-hydraulic grab with electromagnetic cartridge valve control structure |
| CN102145854A (en) * | 2011-04-11 | 2011-08-10 | 杭州电子科技大学 | Electric four-clack hydraulic grab bucket |
| CN104310211A (en) * | 2014-08-26 | 2015-01-28 | 上海港怡动力***有限公司 | High-temperature-resistant electric grab bucket |
| CN111022406A (en) * | 2019-12-27 | 2020-04-17 | 浙江三一装备有限公司 | Hydraulic locking structure, hydraulic system and engineering machinery |
-
2010
- 2010-04-13 CN CN2010201570156U patent/CN201678367U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101811642A (en) * | 2010-04-13 | 2010-08-25 | 上海昂丰矿机科技有限公司 | Electro-hydraulic grab with electromagnetic cartridge valve control structure |
| CN102145854A (en) * | 2011-04-11 | 2011-08-10 | 杭州电子科技大学 | Electric four-clack hydraulic grab bucket |
| CN102145854B (en) * | 2011-04-11 | 2013-01-23 | 杭州电子科技大学 | Electric four-clack hydraulic grab bucket |
| CN104310211A (en) * | 2014-08-26 | 2015-01-28 | 上海港怡动力***有限公司 | High-temperature-resistant electric grab bucket |
| CN111022406A (en) * | 2019-12-27 | 2020-04-17 | 浙江三一装备有限公司 | Hydraulic locking structure, hydraulic system and engineering machinery |
| CN111022406B (en) * | 2019-12-27 | 2021-09-17 | 浙江三一装备有限公司 | Hydraulic locking structure, hydraulic system and engineering machinery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20101222 Effective date of abandoning: 20111102 |