CN202100404U - High-efficiency conveying system of concrete or coal slime and two-position three-way liquid control reversing valves utilized by same - Google Patents
High-efficiency conveying system of concrete or coal slime and two-position three-way liquid control reversing valves utilized by same Download PDFInfo
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- CN202100404U CN202100404U CN2011201832609U CN201120183260U CN202100404U CN 202100404 U CN202100404 U CN 202100404U CN 2011201832609 U CN2011201832609 U CN 2011201832609U CN 201120183260 U CN201120183260 U CN 201120183260U CN 202100404 U CN202100404 U CN 202100404U
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Abstract
The utility model discloses a high-efficiency conveying system of concrete or coal slime and two-position three-way liquid control reversing valves utilized by the same. The system comprises three three-position four-way solenoid reversing valves and six two-position three-way liquid control reversing valves. The output ends of the three three-position four-way solenoid reversing valves are reasonably connected with the input ends of the six two-position three-way liquid control reversing valves. By means of a programmable logic controller (PLC) instructions, the three three-position four-way solenoid reversing valves control the six two-position three-way liquid control reversing valves in reversing mode so as to control the opening and closing of an oil way flowing from a main hydraulic pump to a main oil cylinder and an oscillating oil cylinder and achieve the purpose of high efficient pump conveying. The two-position three-way liquid control reversing valves specially designed according to the system are cartridge valves different from a traditional slide valve. The high-efficiency conveying system of the concrete or the coal slime and the two-position three-way liquid control reversing valves utilized by the same have the advantages of having low working oil temperature, low working noise, high working efficiency, long service life and stable and reliable operation.
Description
[technical field]
The utility model relates to concrete or coal slime feedway and makes the field, relates in particular to a kind of preparation of high efficient concrete or coal slime transporting system and controlling method and is applied to the two-bit triplet pilot operated directional control valve of this system.
[background technique]
The electrohydraulic control system of concrete or coal slime feedway; Be applied in concrete or coal slime carry in the function of pumping, distribution and the stirring of accomplishing concrete or coal slime; The patent No. is 200510031258.9 Chinese utility model patent, discloses a kind of concrete pump hydraulic system auxiliary energy-storage flow-increasing device (two), the background technique of this patent documentation and model utility content displaying two kinds of electrohydraulic control systems; A kind of by working oil path with stir oil circuit and constitute promptly so-called double pump fuel feeding; A kind of by the pumping oil circuit, distribute oil circuit and stir oil circuit and constitute promptly so-called three oil pump feeds; The former adopts the working method of the two oil returns of single oil-feed; Need lean on damming each other of electro-hydraulic reversing valve to keep-up pressure during hydraulic work system, and the pressurization of damming for a long time can make electro-hydraulic reversing valve let out in increasing, and also causes oily temperature rise simultaneously; Shorten the working life of oil hydraulic pump and electro-hydraulic reversing valve, energy consumption is high.The latter is under the situation that need are controlled cost, and is because power plant power is certain, enough big for guaranteeing the used hydraulic pressure pump delivery of pumping oil circuit; Swing distributes the used hydraulic pump discharge of oil circuit can not be too big, and for guaranteeing the swing switching-over rapidly, the swing oil circuit need increase shops such as constant voltage and energy storage and help device; Long-term constant voltage can cause oily temperature rise, and working efficiency reduces, and energy consumption is high; Oil hydraulic pump is fragile, if use high-power power plant, Economy can descend; All oil cylinders all need be in pressure state during the two work, and operational noise is big, and rate of fault is high; The 3-position 4-way electro-hydraulic control valve of conventional use in the transmission and concrete transmission system, for producing built-in oil duct, its employed spool is hollow; Under the pressure of high pressure oil, be easy to generate bending deflection, it is big to have a volume; Flow is little, and sealing effect is poor, in let out big; Shortcomings such as the pressure loss and noise are very big, and rate of fault is high, and working life is short.To this background, the claimant has done long-term research and development, so that better effect to be provided.
[model utility content]
The purpose of the utility model is to solve the defective that existing technology exists; A kind of preparation of high efficient concrete or coal slime transporting system and controlling method and used two-bit triplet pilot operated directional control valve are provided, through change that oil circuit connects and the method for work schedule make this system help to reduce oil circuit working oil temperature, reduce operational noise, improve work efficiency, improve parts working life, improve the reliability of hydraulic system.
In order to solve the technical problem of above-mentioned existence, the utility model adopts following technical proposal:
Preparation of high efficient concrete or coal slime transporting system; First, second sensor that includes automatical control system, power mechanism, stirring mechanism, control mechanism, pumping mechanism, swing mechanism, oil sump tank and be used to detect pumping stroke; Be used for the wobble detection stroke the 3rd, four-sensor, described automatical control system includes PLC, hand switch and linking route; Said power mechanism includes prime mover, Main Hydraulic Pump and secondary oil hydraulic pump; Said control mechanism includes three 3-position 4-way solenoid directional control valves, and wherein, first 3-position 4-way solenoid directional control valve meta function is the Y type, and second and the 3rd 3-position 4-way solenoid directional control valve meta function are the O type; Also comprise six two-bit triplet pilot operated directional control valves, P mouth and T mouth were not connected when these six valves had the pressure input at control end, and P mouth and A mouth are connected when control end has the pressure input; Said pumping mechanism includes parallel first master cylinder that is arranged side by side, second master cylinder; A two master cylinders end is in the same way connected through hydraulic tubing; The first master cylinder the other end connects first pumping line through piston rod; The second master cylinder the other end connects second pumping line through piston rod; Be fixed with first signal occurrence device that can cooperate on the piston rod of first master cylinder, be fixed with the secondary signal generating means that can cooperate on the piston rod of second master cylinder with said second sensor with said first sensor; Said swing mechanism includes first oscillating oil cylinder, second oscillating oil cylinder; The piston rod butt joint of two oscillating oil cylinders forms " ∧ " shape; Its joint is provided with the swing S that when piston rod is flexible, can promote its rotation and can dock with said first pumping line or second pumping line and manages, and also is provided with the 3rd signal occurrence device that can cooperate with said the 3rd, four-sensor on the swing mechanism;
The hydraulic circuit Placement of said power mechanism, stirring mechanism, control mechanism, pumping mechanism and swing mechanism is:
Main Hydraulic Pump is connected with the P mouth of second two-bit triplet pilot operated directional control valve; Secondary oil hydraulic pump is connected with P1, P2, the P3 mouth of said three 3-position 4-way solenoid directional control valves respectively, also is connected with stirring mechanism; The T1 of three 3-position 4-way solenoid directional control valves, T2, T3 mouth are connected with oil sump tank;
The A mouth of second two-bit triplet pilot operated directional control valve connect simultaneously first, the A mouth of the 3rd two-bit triplet pilot operated directional control valve;
The A mouth of the 5th two-bit triplet pilot operated directional control valve connects the A mouth of the 4th, the 6th two-bit triplet pilot operated directional control valve simultaneously; First, the T mouth intercommunication of second and the 3rd two-bit triplet pilot operated directional control valve and be connected with the P mouth of the 5th two-bit triplet pilot operated directional control valve, the T mouth of the 4th, the 5th and the 6th two-bit triplet pilot operated directional control valve all is connected to oil sump tank;
The P mouth of first two-bit triplet pilot operated directional control valve connects said first master cylinder, and the P mouth of the 3rd two-bit triplet pilot operated directional control valve connects said second master cylinder;
The P mouth of the 4th two-bit triplet pilot operated directional control valve connects said first oscillating oil cylinder, and the P mouth of the 6th two-bit triplet pilot operated directional control valve connects said second oscillating oil cylinder;
The control end of first two-bit triplet pilot operated directional control valve is connected with the A3 mouth of said the 3rd 3-position 4-way solenoid directional control valve;
The control end of second two-bit triplet pilot operated directional control valve is connected with the B1 mouth of said first 3-position 4-way solenoid directional control valve;
The control end of the 3rd two-bit triplet pilot operated directional control valve is connected with the B3 mouth of said the 3rd 3-position 4-way solenoid directional control valve;
The control end of the 4th two-bit triplet pilot operated directional control valve is connected with the A2 mouth of said second 3-position 4-way solenoid directional control valve;
The control end of the 5th two-bit triplet pilot operated directional control valve is connected with the A1 mouth of said first 3-position 4-way solenoid directional control valve;
The control end of the 6th two-bit triplet pilot operated directional control valve is connected with the B2 mouth of said second 3-position 4-way solenoid directional control valve.
Further design; Be provided with relief valve between the P mouth of described Main Hydraulic Pump and second two-bit triplet pilot operated directional control valve, first, be provided with relief valve between the P mouth of the T mouth of second and the 3rd two-bit triplet pilot operated directional control valve and the 5th two-bit triplet pilot operated directional control valve.
Further design, the T mouth through said the 4th, the 5th, the 6th two-bit triplet pilot operated directional control valve and be provided with radiator and filter to the oil circuit of oil sump tank through said relief valve.
A kind of two-bit triplet pilot operated directional control valve that is applied to said system is characterized in that including spool, valve pocket and Returnning spring; Described valve pocket is the hollow circular body that an end is established opening; Be provided with near the valve pocket circumference of establishing opening one end form said A mouth on valve opening; On the circumference of said valve pocket below the last valve opening, be provided with the middle valve opening that forms said P mouth, valve pocket downside end face is provided with the following valve opening that forms said T mouth; Said spool is its external diameter solid Cylindrical object suitable with the valve pocket internal diameter, is plugged in the valve pocket, and said Returnning spring is installed in the valve pocket of spool lower end; The excircle at said spool middle part is provided with annular recess indent, that be used to form the fluid passage, and spool top is provided with the cavity that is used to form the low pressure oil guide chamber along axial direction; Valve pocket lower inside perisporium is provided with and can cooperates the step that forms sealing surface with spool.
Further design, said spool lower end is axially arranged with cylindrical stepped boss, and said Returnning spring one end is sleeved on the stepped boss, is respectively equipped with the chamfering that when both cooperate, can form cone seal on the stepped boss of said spool and the step of valve pocket.
Further design, the stepped circular body that said valve pocket reduces for external diameter from top to bottom step by step.
Further design, described upward valve opening is 6, is arranged symmetrically on the circumference of valve pocket.
Further design, described middle valve opening is 6, is arranged symmetrically on the circumference of valve pocket.
Further design, described valve opening down is 7, wherein has 6 sizes identical, circularizes arranged in arrays on valve pocket downside end face, another bore is bigger, is arranged on valve pocket downside end face middle part.
The utility model compared with prior art has following advantage:
1, the utility model cooperates with sensor through signal occurrence device; Sensor sends signal and is received by PLC; PLC acts on three solenoid directional control valves respectively according to the program timesharing successively of its inner setting; Through six two-bit triplet pilot operated directional control valves of three solenoid directional control valve control, thereby control flows is to the oil circuit break-make of master cylinder and oscillating oil cylinder; Electrohydraulic control system is through accurate timesharing control, monitoring to three solenoid directional control valves, six pilot operated directional control valves and four sensors; Make working connection only need cylinder system of single driving constantly a job; And another oil-way system is in reset mode the hydraulic oil non-resistance is passed through; Therefore make the oil cylinder that is connected on this system's selector valve be in the shutoff buffer status simultaneously, have that the oil temperature is low, noise is little, long service life, make the advantage that maintenance cost is low, energy consumption is low, reliability is high.
2, because the spool of the employed two-position three way pilot operated directional control valve of this system and valve pocket have all adopted with a kind of wear-resisting high hardness alloy processes; Adding upper valve core is the entity spool; Spool length is shorter more than 2/3rds than conventional valve core of the spool valve, and is more reliably more durable than traditional selector valve.
3, this two-position three way pilot operated directional control valve volume is little, the conventional guiding valve of flow-rate ratio is big, does not have built-in control oil duct oilhole, has adopted the low pressure external control mode that leaks, so the pressure loss is little, noise reduces greatly, and usefulness significantly improves.
4, the T mouth of two-position three way pilot operated directional control valve is in the low pressure refueling position all the time, so control and reaction are very sensitive because the sealing effect of cone valve is arranged, in let out very lowly, oily temperature reduces greatly, system effectiveness improves greatly.
[description of drawings]
Mode of execution below in conjunction with accompanying drawing and the utility model is described in further detail:
Fig. 1 is the principle schematic one of the electrohydraulic control system of the utility model.
Fig. 2 is the principle schematic two of the electrohydraulic control system of the utility model.
Fig. 3 is that sensor, the electro-hydraulic reversing valve of the utility model is connected schematic representation with PLC.
Fig. 4 is the pumping oil cylinder of the utility model and the cooperation theory structure schematic representation of oscillating oil cylinder.
Fig. 5 is the blast structural representation of Fig. 4.
Fig. 6 is the blast structural representation of the used two-bit triplet pilot operated directional control valve of the utility model.
Fig. 7 is the cross-sectional view of the used two-bit triplet pilot operated directional control valve of the utility model.
Fig. 8 is that the used two-bit triplet pilot operated directional control valve of the utility model is installed on the schematic representation in the valve seat.
[embodiment]
Shown in Fig. 1-5; A kind of high-effect low power consumption concrete or coal slime transporting system; First, second sensor 25,26 that includes automatical control system, power mechanism I, stirring mechanism II, control mechanism III, pumping mechanism IV, swing mechanism V, oil sump tank 34 and be used to detect pumping stroke; Be used for the wobble detection stroke the 3rd, four- sensor 21,22, automatical control system includes PLC, hand switch and linking route (figure do not show); Power mechanism I includes prime mover 8, Main Hydraulic Pump 9 and secondary oil hydraulic pump 10; Control mechanism III includes three 3-position 4-way solenoid directional control valves 1,2,3, and wherein, first 3-position 4-way solenoid directional control valve 1 meta function is the Y type, and second and the 3rd 3-position 4-way solenoid directional control valve 2,3 meta functions are the O type; Also comprise six two-bit triplet pilot operated directional control valves 13,14,15,16,18,19, P mouth and T mouth were not connected when these six valves had the pressure input at control end, and P mouth and A mouth are connected when control end has the pressure input; Pumping mechanism IV includes parallel first master cylinder 27, second master cylinder 28 that is arranged side by side; A two master cylinders end is in the same way connected through hydraulic tubing; First master cylinder, 27 the other ends connect first pumping line 35 through piston rod; Second master cylinder, 28 the other ends connect second pumping line 36 through piston rod; Be fixed with on the piston rod of first master cylinder 27 on the piston rod of first signal occurrence device, 29, the second master cylinders 28 that can cooperate and be fixed with the secondary signal generating means 30 that can cooperate with second sensor 26 with first sensor 25; Swing mechanism V includes first oscillating oil cylinder 24, second oscillating oil cylinder 20; The piston rod butt joint of two oscillating oil cylinders forms " ∧ " shape; Its joint is provided with swing S pipe 37, also is provided with the 3rd signal occurrence device 23 that can cooperate with said the 3rd, four- sensor 21,22 on the swing mechanism V; Stirring mechanism is an existing technology, does not describe at this.
In the utility model, first, second sensor 25,26 is fixedly installed on the concrete pumping equipment, and first signal occurrence device 29 is for being fixedly installed on the block on first master cylinder, 27 piston rods; Secondary signal generating means 30 is for being fixedly installed on the block on second master cylinder, 28 piston rods; Three, four- sensor 21,22 is fixedly mounted on the concrete pumping equipment through V shaped slab 31, and the 3rd signal occurrence device 23 is for being arranged on first oscillating oil cylinder 24, second oscillating oil cylinder, the 20 joints flexible fan shape baffle that rotates with both.
In the utility model, swing S pipe 37 swings with first oscillating oil cylinder 24, the flexible of second oscillating oil cylinder 20; When the piston rod of second oscillating oil cylinder 20 stretched out, the mouth of pipe of swing S pipe 37 was put right-hand member R place, thereby realizes docking with second pumping line 36; When the piston rod of first oscillating oil cylinder 24 stretched out, the mouth of pipe of swing S pipe 37 was put left end L place, thereby realizes docking with first pumping line 35.
The hydraulic circuit Placement of the power mechanism I of the utility model, stirring mechanism II, control mechanism III, pumping mechanism IV and swing mechanism V is:
Main Hydraulic Pump 9 is connected with the P mouth of second two-bit triplet pilot operated directional control valve 14; Secondary oil hydraulic pump 10 is connected with P1, P2, the P3 mouth of said three 3-position 4-way solenoid directional control valves 1,2,3 respectively, also is connected with stirring mechanism simultaneously; The T1 of three 3-position 4-way solenoid directional control valves 1,2,3, T2, T3 mouth are connected with oil sump tank;
The A mouth of second two-bit triplet pilot operated directional control valve 14 connect simultaneously first, the A mouth of the 3rd two-bit triplet pilot operated directional control valve 13,15;
The A mouth of the 5th two-bit triplet pilot operated directional control valve 18 connects the A mouth of the 4th, the 6th two-bit triplet pilot operated directional control valve 15,19 simultaneously; First, the T mouth intercommunication of second and the 3rd two-bit triplet pilot operated directional control valve 13,14,15 and be connected with the P mouth of the 5th two-bit triplet pilot operated directional control valve 18, the T mouth of the 4th, the 5th and the 6th two-bit triplet pilot operated directional control valve 16,18,19 all is connected to oil sump tank 34;
The P mouth that the P mouth of first two-bit triplet pilot operated directional control valve 13 connects 27, the three two-bit triplet pilot operated directional control valves 15 of first master cylinder connects second master cylinder 28;
The P mouth that the P mouth of the 4th two-bit triplet pilot operated directional control valve 16 connects 24, the six two-bit triplet pilot operated directional control valves 19 of first oscillating oil cylinder connects second oscillating oil cylinder 20;
The control end 7Y of first two-bit triplet pilot operated directional control valve 13 is connected with the A3 mouth of the 3rd 3-position 4-way solenoid directional control valve 3;
The control end 8Y of second two-bit triplet pilot operated directional control valve 14 is connected with the B1 mouth of first 3-position 4-way solenoid directional control valve 1;
The control end 9Y of the 3rd two-bit triplet pilot operated directional control valve 15 is connected with the B3 mouth of the 3rd 3-position 4-way solenoid directional control valve 3;
The control end 10Y of the 4th two-bit triplet pilot operated directional control valve 16 is connected with the A2 mouth of second 3-position 4-way solenoid directional control valve 2;
The control end 11Y of the 5th two-bit triplet pilot operated directional control valve 18 is connected with the A1 mouth of first 3-position 4-way solenoid directional control valve 1;
The control end 12Y of the 6th two-bit triplet pilot operated directional control valve 19 is connected with the B2 mouth of second 3-position 4-way solenoid directional control valve 3.
For guaranteeing system's operating pressure safety; Between the P mouth of Main Hydraulic Pump 9 and second two-bit triplet pilot operated directional control valve 14, be provided with relief valve 12, first, be provided with relief valve 17 between the P mouth of the T mouth of second and the 3rd two-bit triplet pilot operated directional control valve 13,14,15 and the 5th two-bit triplet pilot operated directional control valve 18.
Be provided with radiator 31 and filter 32 through the T mouth of the 4th, the 5th, the 6th two-bit triplet pilot operated directional control valve 16,18,19 and through relief valve 12,17 oil circuits to oil sump tank 34.
The controlling method of the utility model is following:
Machine startup, system's no-load running, three 3-position 4-way solenoid directional control valves all are in reset mode; This moment, the P1 mouth of first 3-position 4-way solenoid directional control valve 1 was obstructed, and A1, B1, T1 communicate for three mouthfuls, and the input/output port of second and the 3rd 3-position 4-way solenoid directional control valve all is in sealed condition; Like this, all the two-position three way pilot operated directional control valves on the working oil path are in reset mode, and the P mouth that forms two-position three way pilot operated directional control valve 14 communicates with the T mouth; The P mouth of two-position three way pilot operated directional control valve 18 communicates with the T mouth, from the high pressure oil of Main Hydraulic Pump output, after relief valve 12 pressure limitings; P mouth by two-position three way pilot operated directional control valve 14 flows into the outflow of T mouth; After relief valve 17 pressure limitings, flow into the T mouth through the P of two-position three way pilot operated directional control valve 18 mouth and flow out again, get back to oil sump tank through sink 31 and filter 32 then; So just, formed unresisted no-load running state, more the energy-saving heating amount is lower.
After the empty machine operation; Make through hand switch first 3-position 4-way solenoid directional control valve 1 2Y end and the 3rd 3-position 4-way solenoid directional control valve 3 the 5Y end simultaneously; The P1 mouth of first 3-position 4-way solenoid directional control valve 1 and the connection of B1 mouth, T1 mouth and A1 mouth are connected, and the P3 mouth of the 3rd 3-position 4-way solenoid directional control valve 3 and the connection of A3 mouth, T3 mouth and B mouth 3 are connected; Low voltage control oil flows to the control end 8Y of second two-position three way pilot operated directional control valve 14 through the P1 of first 3-position 4-way solenoid directional control valve 1 mouth and B1 mouth; Through the P3 mouth of the 3rd 3-position 4-way solenoid directional control valve 3 and the control end 7Y that the A3 mouth flows to first two-position three way pilot operated directional control valve 13; The spool of two hydraulic control valve moves down; Thereby the P mouth of second two-position three way pilot operated directional control valve 14 and A mouth are connected; The P mouth of first two-position three way pilot operated directional control valve 13 and A mouth are connected, from the high pressure oil of Main Hydraulic Pump output after relief valve 12 pressure limitings, through the P mouth of second two-position three way pilot operated directional control valve 14 and A mouth and the P mouth that the A mouth flows to first two-position three way pilot operated directional control valve 13; The high pressure oil that flows out from the P mouth of first two-position three way pilot operated directional control valve gets into the pumping oil cylinder 27; Simultaneously because the oil of the chamber in the pumping oil cylinder 28 flows back to oil sump tank through the P mouth and the T mouth of the 3rd two-position three way pilot operated directional control valve 15, so pumping oil cylinder 27 contracts and moves back, and pumping oil cylinder 28 stretches out.
Equally; Make through switch first 3-position 4-way solenoid directional control valve 1 2Y end and the 3rd 3-position 4-way solenoid directional control valve 3 the 6Y end simultaneously; The P1 mouth of first 3-position 4-way solenoid directional control valve 1 and the connection of B1 mouth, T1 mouth and A1 mouth are connected; The P3 mouth of the 3rd 3-position 4-way solenoid directional control valve 3 and the connection of B3 mouth, T3 mouth and A3 mouth are connected; Low voltage control oil flows to the control end 8Y of second two-position three way pilot operated directional control valve 14 through the P1 of first 3-position 4-way solenoid directional control valve 1 mouth and B1 mouth, and through the P3 mouth of the 3rd 3-position 4-way solenoid directional control valve 3 and the control end 9Y that the B3 mouth flows to the 3rd two-position three way pilot operated directional control valve 15, the spool of two hydraulic control valve moves down; Thereby the P mouth of second two-position three way pilot operated directional control valve 14 and A mouth are connected; The P mouth of the 3rd two-position three way pilot operated directional control valve 15 and A mouth are connected, from the high pressure oil of Main Hydraulic Pump output after relief valve 12 pressure limitings, through the P mouth of second two-position three way pilot operated directional control valve 14 and A mouth and the P mouth that the A mouth flows to the 3rd two-position three way pilot operated directional control valve 15; The high pressure oil that flows out from the P mouth of the 3rd two-position three way pilot operated directional control valve gets into the pumping oil cylinder 28; Simultaneously because the chamber oil in the pumping oil cylinder 27 flows back to oil sump tank through the P of first two-position three way pilot operated directional control valve 13 mouth and T mouth, so pumping oil cylinder 28 contracts and moves back, and pumping oil cylinder 27 stretches out.
So just accomplished the manual activity control of two pumping oil cylinders.
After the empty machine operation; Make through hand switch first 3-position 4-way solenoid directional control valve 1 1Y end and second 3-position 4-way solenoid directional control valve 2 the 3Y end simultaneously; The P1 mouth of first 3-position 4-way solenoid directional control valve 1 and A1 connection, T1 mouth and B1 mouth are connected; The P2 mouth of second 3-position 4-way solenoid directional control valve 2 and the connection of A2 mouth, T2 mouth and B2 mouth are connected; Low voltage control oil flows to the control end 11Y of the 5th two-position three way pilot operated directional control valve 18 through the P1 of first 3-position 4-way solenoid directional control valve 1 mouth and A1 mouth, through the P2 mouth of second 3-position 4-way solenoid directional control valve 3 and the control end 10Y that the A2 mouth flows to the 4th two-position three way pilot operated directional control valve 16, like this; The spool of two hydraulic control valve moves down; Thereby the P mouth and the A mouth that make the 5th two-position three way pilot operated directional control valve 18 are connected, the P mouth of the 4th two-position three way pilot operated directional control valve 16 is connected with the A mouth, and reset second two-position three way pilot operated directional control valve 14 because first 3-position 4-way solenoid directional control valve 1 switching-over 1Y holds this moment; The P mouth of second two-position three way pilot operated directional control valve 14 and T mouth are connected; After relief valve 12 pressure limitings, after the P of second two-position three way pilot operated directional control valve 14 mouth and T mouth and relief valve 17 pressure limitings, flow to the P mouth and the A mouth of the 5th two-position three way pilot operated directional control valve 18 from the high pressure oil of Main Hydraulic Pump output, flow into the A mouth and the P mouth of the 4th two-position three way pilot operated directional control valve 16 again; The high pressure oil that flows out from the P mouth of the 4th two-position three way pilot operated directional control valve 16 gets into the oscillating oil cylinder 24; Because second 3-position 4-way solenoid directional control valve switching-over 3Y holds, and the 6th two-position three way pilot operated directional control valve 19 resets, the chamber oil in the oscillating oil cylinder 20 flows back to oil sump tank through the P mouth and the T mouth of the 6th two-position three way pilot operated directional control valve 19 simultaneously; Therefore oscillating oil cylinder 24 stretches out, and oscillating oil cylinder 20 contracts and moves back.
Equally; After the empty machine operation; Make through switch first 3-position 4-way solenoid directional control valve 1 1Y end and second 3-position 4-way solenoid directional control valve 2 the 4Y end simultaneously; The P1 mouth of first 3-position 4-way solenoid directional control valve 1 and the connection of A1 mouth, T1 mouth and B1 mouth are connected; The P2 mouth of second 3-position 4-way solenoid directional control valve 2 and B2 mouth are connected, the T2 mouth is connected with the A2 mouth, and low voltage control oil flows to the control end 11Y of the 5th two-position three way pilot operated directional control valve 18, the P2 mouth of second 3-position 4-way solenoid directional control valve 2 of warp and the control end 12Y that the B2 mouth flows to the 6th two-position three way pilot operated directional control valve 19 through the P1 of first 3-position 4-way solenoid directional control valve 1 mouth and B1 mouth; The spool of two hydraulic control valve moves down; Thereby the P mouth and the A mouth that make the 5th two-position three way pilot operated directional control valve 18 are connected, the P mouth of the 6th two-position three way pilot operated directional control valve 19 is connected with the A mouth, and reset second two-position three way pilot operated directional control valve 14 because first 3-position 4-way solenoid directional control valve 1 switching-over 1Y holds this moment; The P mouth of second two-position three way pilot operated directional control valve 14 and T mouth are connected; After relief valve 12 pressure limitings, after the P of second two-position three way pilot operated directional control valve 14 mouth and T mouth and relief valve 17 pressure limitings, flow to the P mouth and the A mouth of the 5th two-position three way pilot operated directional control valve 18 from the high pressure oil of Main Hydraulic Pump output, flow into the A mouth and the P mouth of the 6th two-position three way pilot operated directional control valve 19 again; The high pressure oil that flows out from the P mouth of the 6th two-position three way pilot operated directional control valve 19 gets into the oscillating oil cylinder 20; Because second 3-position 4-way solenoid directional control valve switching-over 4Y holds, and the 4th two-position three way pilot operated directional control valve 16 resets, the chamber oil in the oscillating oil cylinder 24 flows back to oil sump tank through the P mouth and the T mouth of the 4th two-position three way pilot operated directional control valve 16 simultaneously; Therefore oscillating oil cylinder 20 stretches out, and oscillating oil cylinder 24 contracts and moves back.
So just accomplished the manual activity control of two oscillating oil cylinders.
In the utility model, manually during state of a control, the working state of three 3-position 4-way solenoid directional control valves 1,2,3 is as shown in table 1.
| | 1Y | |
3Y | 4Y | 5Y | 6Y | |
| First master cylinder, 27 suctions (28 feedings of second master cylinder) | ☆ | ☆ | |||||
| Second master cylinder, 28 suctions (27 feedings of first master cylinder) | ☆ | ☆ | |||||
| 24 pressurizations of first oscillating oil cylinder | ☆ | ☆ | |||||
| 20 pressurizations of second oscillating oil cylinder | ☆ | ☆ |
Table 1 (☆ represent)
When the system of the utility model uses automatic running state, come common the completion through PLC and sensor 21,22,25,26 and with control system cooperating that the signal occurrence device 23,29,30 of sensor cooperating is formed.
When four-sensor 22 is sensed fan shape baffle 23; Expression swing S manages 37 interfaces and docks with second pumping line 36; Four-sensor 22 feeds back signal to PLC; The 2Y end of first 3-position 4-way solenoid directional control valve 1 of PLC instruction and the 5Y end of the 3rd 3-position 4-way solenoid directional control valve 3 are simultaneously; The P1 mouth of first 3-position 4-way solenoid directional control valve 1 and the connection of B1 mouth, T1 mouth and A1 mouth are connected; The P3 mouth of the 3rd 3-position 4-way solenoid directional control valve 3 and the connection of A3 mouth, T3 mouth and B3 mouth are connected; Low voltage control oil flows to the control end 8Y of second two-position three way pilot operated directional control valve 14 through the P1 of first 3-position 4-way solenoid directional control valve 1 mouth and B1 mouth; Through the P3 mouth of the 3rd 3-position 4-way solenoid directional control valve 3 and the control end 7Y that the A3 mouth flows to first two-position three way pilot operated directional control valve 13, the spool of two pilot operated directional control valves moves down, thereby makes the P mouth and the connection of A mouth of P mouth with the connection of A mouth, first two-position three way pilot operated directional control valve 13 of second two-position three way pilot operated directional control valve 14; From the high pressure oil of Main Hydraulic Pump output after relief valve 12 pressure limitings; Through the P mouth of second two-position three way pilot operated directional control valve 14 and P mouth and the A mouth that the A mouth flows to first two-position three way pilot operated directional control valve 13, the high pressure oil that flows out from the P mouth of first two-position three way pilot operated directional control valve gets into first master cylinder 27, simultaneously because the P mouth and the T mouth of the 3rd two-position three way pilot operated directional control valve 15 of the oily warp in the chamber in second master cylinder 28 flow back to oil sump tank; Therefore first master cylinder 27 contracts to move back and makes first pumping line 35 carry out the suction action, and second master cylinder 28 stretches out and makes pumping line 36 carry out the feeding action.
Block 29 on first master cylinder 27 moves to first sensor 25 places; Represent that first pumping line 35 accomplished suction action; First sensor 25 feeds back signal to PLC, and the 5Y end of the 2Y of first 3-position 4-way solenoid directional control valve 1 of PLC instruction end and the 3rd 3-position 4-way solenoid directional control valve 3 dead electricity simultaneously then makes first 3-position 4-way solenoid directional control valve 1 valve core reset and makes its B1 mouth and the connection of T1 mouth; Thereby second two-position three way pilot operated directional control valve 14 resetted; Selector valve 14 valve core resets, the P mouth and the T mouth of second two-position three way pilot operated directional control valve 14 of connection make without hindrance second the two-position three way pilot operated directional control valve 14 that flow through of high pressure oil in the working connection flow to the swing reversing mechanisms; Its A3 mouth is the partition state and the 3rd 3-position 4-way solenoid directional control valve 3 resets; Can keep the P mouth and the A mouth of first two-position three way pilot operated directional control valve 13 and connect, thereby it is motionless to lock first master cylinder 27, equally also locks second master cylinder 28; PLC instructs the 3Y of 1Y end and second 3-position 4-way solenoid directional control valve of first 3-position 4-way solenoid directional control valve 1 to hold again; The P1 mouth of first 3-position 4-way solenoid directional control valve 1 and the connection of A1 mouth, T1 mouth and B1 mouth are connected; The P2 mouth of second 3-position 4-way solenoid directional control valve 2 and the connection of A2 mouth, T2 mouth and B2 mouth are connected; Low voltage control oil flows to the control end 11Y of the 5th two-position three way pilot operated directional control valve 18 through the P1 of first 3-position 4-way solenoid directional control valve 1 mouth and A1 mouth; Through the P2 mouth of second 3-position 4-way solenoid directional control valve 2 and the control end 10Y that the A2 mouth flows to the 4th two-position three way pilot operated directional control valve 16; The spool that valve is changed in two hydraulic controls moves down, thereby P mouth and the A mouth of the 5th two-position three way pilot operated directional control valve 18 is connected, the P mouth and the A mouth of the 4th two-position three way pilot operated directional control valve 16 connect, this moment since first 3-position 4-way solenoid directional control valve 1 switching-over 1Y hold; Second two-position three way pilot operated directional control valve 14 resetted; The P mouth of second two-position three way pilot operated directional control valve 14 and T mouth are connected, and after relief valve 12 pressure limitings, after the P of second two-position three way pilot operated directional control valve 14 mouth and T mouth and relief valve 17 pressure limitings, flow to the P mouth and the A mouth of the 5th two-position three way pilot operated directional control valve 18 from the high pressure oil of Main Hydraulic Pump output; Flow into the A mouth and the P mouth of the 4th two-position three way pilot operated directional control valve 16 again; The high pressure oil that flows out from the P mouth of the 4th two-position three way pilot operated directional control valve 16 gets into first oscillating oil cylinder 24, and simultaneously because second 3-position 4-way solenoid directional control valve switching-over 3Y end, the 6th two-position three way pilot operated directional control valve 19 resets; Chamber oil in the oscillating oil cylinder 20 flow back into oil sump tank through the P mouth and the T mouth of the 6th two-position three way pilot operated directional control valve 19; Therefore first oscillating oil cylinder 24 stretches out under the high pressure oil effect, and second oscillating oil cylinder 20 contracts and moves back, and docks with first pumping line 35 thereby promote swing S pipe 37 switching-over L ends.
When the 3rd sensor 21 is sensed fan shape baffle 23; Expression swing S interface tube 37 has docked with first pumping line 35; The 3rd sensor 21 feeds back signal to PLC; The 3Y of the 1Y end of first 3-position 4-way solenoid directional control valve 1 of PLC instruction and second 3-position 4-way solenoid directional control valve 2 holds dead electricity simultaneously then; Make first 3-position 4-way solenoid directional control valve 1 valve core reset and its T1 mouth and A1 mouth are connected, thereby the 5th two-position three way pilot operated directional control valve 18 resetted, connect the P mouth and the T mouth of the 5th two-position three way pilot operated directional control valve 18; Make that high pressure oil in the working connection is without hindrance to be flow through the 5th two-position three way pilot operated directional control valve 18 and flow to oil sump tank; And second 3-position 4-way solenoid directional control valve 2 resets and its A2 mouth is the partition state, can keep the P mouth and the A mouth of the 4th two-position three way pilot operated directional control valve 16 to connect, thereby it is motionless to lock first oscillating oil cylinder 24; The 6Y end of the 2Y of first 3-position 4-way solenoid directional control valve 1 of PLC instruction end and the 3rd 3-position 4-way solenoid directional control valve 3 simultaneously then; The P1 mouth of first 3-position 4-way solenoid directional control valve 1 and the connection of B1 mouth, T1 mouth and A1 mouth are connected; The P3 mouth of the 3rd 3-position 4-way solenoid directional control valve 3 and the connection of B3 mouth, T3 mouth and A3 mouth are connected; Low voltage control oil flows to the control end 8Y of second two-position three way pilot operated directional control valve 14 through the P1 of first 3-position 4-way solenoid directional control valve 1 mouth and B1 mouth; Through the P3 mouth of the 3rd 3-position 4-way solenoid directional control valve 3 and the control end 9Y that the B3 mouth flows to the 3rd two-position three way pilot operated directional control valve 15; The spool of two hydraulic control valve moves down; Thereby the P mouth and the A mouth that make second two-position three way pilot operated directional control valve 14 are connected, the P mouth of the 3rd two-position three way pilot operated directional control valve 15 is connected with the A mouth, from the high pressure oil of Main Hydraulic Pump output after relief valve 12 pressure limitings, the P mouth of second two-position three way pilot operated directional control valve 14 of warp and P mouth and the A mouth that the A mouth flows to the 3rd two-position three way pilot operated directional control valve 15; The high pressure oil that flows out from the P mouth of the 3rd two-position three way pilot operated directional control valve 15 gets into second master cylinder 28; Owing to the 3rd 3-position 4-way solenoid directional control valve 3 switching-over 6Y ends, first two-position three way pilot operated directional control valve 13 resets simultaneously, thereby the chamber oil in first master cylinder 27 flows back to oil sump tank through the P of first two-position three way pilot operated directional control valve 13 mouth and T mouth; Therefore second master cylinder 28 contracts to move back and makes second pumping line 36 carry out the suction action, and first master cylinder 27 stretches out and makes first pumping line 35 carry out the feeding action.
Block 30 on second master cylinder 28 moves to second sensor, 26 places; Represent that second pumping line 36 accomplished suction action; Second sensor 26 feeds back signal to PLC; The 6Y end of the 2Y of first 3-position 4-way solenoid directional control valve 1 of PLC instruction end and the 3rd 3-position 4-way solenoid directional control valve 3 dead electricity simultaneously then makes first 3-position 4-way solenoid directional control valve 1 valve core reset and makes its B1 mouth and the connection of T1 mouth, thereby second two-position three way pilot operated directional control valve 14 resetted; Connect the P mouth and the T mouth of second two-position three way pilot operated directional control valve 14; Make without hindrance second the two-position three way pilot operated directional control valve 14 that flow through of high pressure oil in the working connection flow to the swing reversing mechanisms, and the 3rd 3-position 4-way solenoid directional control valve 3 resets and its B3 mouth is the partition state, can keep the P mouth and the connection of A mouth of the 3rd two-position three way pilot operated directional control valve 15; Thereby it is motionless to lock second master cylinder 28, equally also locks first master cylinder 27; PLC instructs the 4Y of 1Y end and second 3-position 4-way solenoid directional control valve of first 3-position 4-way solenoid directional control valve 1 to hold again then; The P1 mouth of first 3-position 4-way solenoid directional control valve 1 and the connection of A1 mouth, T1 mouth and B1 mouth are connected; The P2 mouth of second 3-position 4-way solenoid directional control valve 2 and the connection of B2 mouth, T2 mouth and A2 mouth are connected; Low voltage control oil flows to the control end 11Y of the 5th two-position three way pilot operated directional control valve 18 through the P1 of first 3-position 4-way solenoid directional control valve 1 mouth and A1 mouth; Through the P2 mouth of second 3-position 4-way solenoid directional control valve 2 and the control end 12Y that the B2 mouth flows to the 6th two-position three way pilot operated directional control valve 19; The spool of two hydraulic control valve moves down, thereby P mouth and the A mouth of the 5th two-position three way pilot operated directional control valve 18 is connected, the P mouth and the A mouth of the 6th two-position three way pilot operated directional control valve 19 connect, this moment since first 3-position 4-way solenoid directional control valve 1 switching-over 1Y hold; Second two-position three way pilot operated directional control valve 14 resetted; The P mouth of second two-position three way pilot operated directional control valve 14 and T mouth are connected, and after relief valve 12 pressure limitings, after the P of second two-position three way pilot operated directional control valve 14 mouth and T mouth and relief valve 17 pressure limitings, flow to the P mouth and the A mouth of the 5th two-position three way pilot operated directional control valve 18 from the high pressure oil of Main Hydraulic Pump output again; Flow into the A mouth and the P mouth of the 6th two-position three way pilot operated directional control valve 19 again; The high pressure oil that flows out from the P mouth of the 6th two-position three way pilot operated directional control valve 19 gets into second oscillating oil cylinder 20, and simultaneously because second 3-position 4-way solenoid directional control valve switching-over 4Y end, the 4th two-position three way pilot operated directional control valve 16 resets; Chamber oil in the oscillating oil cylinder 24 flows back to oil sump tank through the P mouth and the T mouth of the 4th two-position three way pilot operated directional control valve 16; Therefore second oscillating oil cylinder 20 stretches out under the high pressure oil effect, and first oscillating oil cylinder 24 contracts and moves back, and docks with second pumping line 36 thereby promote swing S pipe 37 switching-over R ends.
System has just accomplished the operation of one-period like this, is circulated back to the first step and continues operation.
The utility model is in when moving state of a control automatically, and the working state of 3-position 4-way solenoid directional control valve 1,2,3 is as shown in table 2, and the working state of six two-bit triplet pilot operated directional control valves 13,14,15,16,18,19 is as shown in table 3.
| | 1Y | |
3Y | 4Y | 5Y | 6Y | |
| First master cylinder, 27 suctions (28 feedings of second master cylinder) | ☆ | ☆ | |||||
| 24 pressurizations of first oscillating oil cylinder | ☆ | ☆ | |||||
| Second master cylinder, 28 suctions (27 feedings of first master cylinder) | ☆ | ☆ | |||||
| 20 pressurizations of second oscillating oil cylinder | ☆ | ☆ |
Table 2 (☆ represent)
| | 7Y | |
9Y | 10Y | 11Y | 12Y | ||
| First master cylinder, 27 suctions (28 feedings of second master cylinder) | ☆ | ☆ | ☆ | |||||
| 24 pressurizations of first oscillating oil cylinder | ☆ | ☆ | ☆ | |||||
| Second master cylinder, 28 suctions (27 feedings of first master cylinder) | ☆ | ☆ | ☆ | |||||
| 20 pressurizations of second oscillating oil cylinder | ☆ | ☆ | ☆ |
Table 3 (☆ representes pressurization)
To shown in Figure 7, a kind of two-bit triplet pilot operated directional control valve of using said system includes spool 1, valve pocket 2 and Returnning spring 5 like Fig. 6; Valve pocket 2 is the hollow circular body that an end is established opening; Be provided with 6 symmetric arrangement near valve pocket 2 circumference of establishing opening one end, form the A mouth on valve opening 201, on the circumference of valve pocket 2 below the last valve opening 201, be provided with 6 symmetric arrangement, form the middle valve opening 202 of P mouth, valve pocket 2 downside end faces are provided with the following valve openings 203 of 7 formation T mouths; Wherein there are 6 sizes identical; Annular array is arranged on the valve pocket 2 downside end faces, and another bore is bigger, is arranged on valve pocket 2 downside end faces middle part.Spool 1 is its external diameter solid Cylindrical object suitable with valve pocket 2 internal diameters; Be plugged in the valve pocket 2; The excircle at spool 1 middle part is provided with annular recess 101 indent, that be used to form the fluid passage, and spool 1 top is provided with the cavity 102 that is used to form the low pressure oil guide chamber along axial direction; Valve pocket 2 lower inside perisporiums are provided with and can cooperate the step 204 that forms sealing surface with spool 1.
Claims (9)
1. preparation of high efficient concrete or coal slime transporting system; First, second sensor (25 that includes automatical control system, power mechanism (I), stirring mechanism (II), control mechanism (III), pumping mechanism (IV), swing mechanism (V), oil sump tank (34) and be used to detect pumping stroke; 26); Be used for the wobble detection stroke the 3rd, four-sensor (21,22), it is characterized in that described automatical control system includes PLC, hand switch and linking route; Said power mechanism (I) includes prime mover (8), Main Hydraulic Pump (9) and secondary oil hydraulic pump (10); Said control mechanism (III) includes three 3-position 4-way solenoid directional control valves (1,2,3), and wherein, first 3-position 4-way solenoid directional control valve (1) meta function is the Y type, and second and the 3rd 3-position 4-way solenoid directional control valve (2,3) meta function are the O type; Also comprise six two-bit triplet pilot operated directional control valves (13,14,15,16,18,19), P mouth and T mouth were not connected when these six valves had the pressure input at control end, and P mouth and A mouth are connected when control end has the pressure input; Said pumping mechanism (IV) includes parallel first master cylinder (27) that is arranged side by side, second master cylinder (28); A two master cylinders end is in the same way connected through hydraulic tubing; First master cylinder (27) the other end connects first pumping line (35) through piston rod; Second master cylinder (28) the other end connects second pumping line (36) through piston rod; Be fixed with first signal occurrence device (29) that can cooperate on the piston rod of first master cylinder (27), be fixed with the secondary signal generating means (30) that can cooperate on the piston rod of second master cylinder (28) with said second sensor (26) with said first sensor (25); Said swing mechanism (V) includes first oscillating oil cylinder (24), second oscillating oil cylinder (20); The piston rod butt joint of two oscillating oil cylinders forms " ∧ " shape; Its joint is provided with the swing S pipe (37) that when piston rod is flexible, can promote its rotation and can dock with said first pumping line (35) or second pumping line (36); Also be provided with on the swing mechanism (V) can with the 3rd signal occurrence device (23) said the 3rd, that four-sensor (21,22) cooperates;
The hydraulic circuit Placement of said power mechanism (I), stirring mechanism (II), control mechanism (III), pumping mechanism (IV) and swing mechanism (V) is:
Main Hydraulic Pump (9) is connected with the P mouth of second two-bit triplet pilot operated directional control valve (14); Secondary oil hydraulic pump (10) connects with P1, P2, the P3 mouth of said three 3-position 4-way solenoid directional control valves (1,2,3) respectively, also is connected with stirring mechanism (II); The T1 of three 3-position 4-way solenoid directional control valves (1,2,3), T2, T3 mouth are connected with oil sump tank (34);
The A mouth of second two-bit triplet pilot operated directional control valve (14) connect simultaneously first, the A mouth of the 3rd two-bit triplet pilot operated directional control valve (13,15);
The A mouth of the 5th two-bit triplet pilot operated directional control valve (18) connects the 4th, the 6th two-bit triplet pilot operated directional control valve (15 simultaneously; 19) A mouth; First, the T mouth intercommunication of second and the 3rd two-bit triplet pilot operated directional control valve (13,14,15) and be connected with the P mouth of the 5th two-bit triplet pilot operated directional control valve (18), the T mouth of the 4th, the 5th and the 6th two-bit triplet pilot operated directional control valve (16,18,19) all is connected to oil sump tank (34);
The P mouth of first two-bit triplet pilot operated directional control valve (13) connects said first master cylinder (27), and the P mouth of the 3rd two-bit triplet pilot operated directional control valve (15) connects said second master cylinder (28);
The P mouth of the 4th two-bit triplet pilot operated directional control valve (16) connects said first oscillating oil cylinder (24), and the P mouth of the 6th two-bit triplet pilot operated directional control valve (19) connects said second oscillating oil cylinder (20);
The control end (7Y) of first two-bit triplet pilot operated directional control valve (13) is connected with the A3 mouth of said the 3rd 3-position 4-way solenoid directional control valve (3);
The control end (8Y) of second two-bit triplet pilot operated directional control valve (14) is connected with the B1 mouth of said first 3-position 4-way solenoid directional control valve (1);
The control end (9Y) of the 3rd two-bit triplet pilot operated directional control valve (15) is connected with the B3 mouth of said the 3rd 3-position 4-way solenoid directional control valve (3);
The control end (10Y) of the 4th two-bit triplet pilot operated directional control valve (16) is connected with the A2 mouth of said second 3-position 4-way solenoid directional control valve (2);
The control end (11Y) of the 5th two-bit triplet pilot operated directional control valve (18) is connected with the A1 mouth of said first 3-position 4-way solenoid directional control valve (1);
The control end (12Y) of the 6th two-bit triplet pilot operated directional control valve (19) is connected with the B2 mouth of said second 3-position 4-way solenoid directional control valve (3).
2. a kind of preparation of high efficient concrete according to claim 1 or coal slime transporting system; It is characterized in that being provided with relief valve (12) between the P mouth of described Main Hydraulic Pump (9) and second two-bit triplet pilot operated directional control valve (14), first, be provided with relief valve (17) between the P mouth of the T mouth of second and the 3rd two-bit triplet pilot operated directional control valve (13,14,15) and the 5th two-bit triplet pilot operated directional control valve (18).
3. a kind of preparation of high efficient concrete according to claim 1 and 2 or coal slime transporting system; It is characterized in that through said the 4th, the 5th, the 6th two-bit triplet pilot operated directional control valve (16; 18; 19) T mouth and be provided with radiator (31) and filter (32) to the oil circuit of oil sump tank (34) through said relief valve (12,17).
4. a two-bit triplet pilot operated directional control valve that is applied to the said system of claim 1 is characterized in that including spool (1), valve pocket (2) and Returnning spring (5); Described valve pocket (2) is the hollow circular body that an end is established opening; On near the valve pocket of establishing opening one end (2) circumference, be provided with the last valve opening (201) that forms said A mouth; On the circumference of last valve opening (201) the said valve pocket in below (2), be provided with the middle valve opening (202) that forms said P mouth, valve pocket (2) downside end face is provided with the following valve opening (203) that forms said T mouth; Said spool (1) is its external diameter solid Cylindrical object suitable with valve pocket (2) internal diameter, is plugged in the valve pocket (2), and said Returnning spring (5) is installed in the valve pocket (2) of spool (1) lower end; The excircle at said spool (1) middle part is provided with annular recess indent, that be used to form the fluid passage (101), and spool (1) top is provided with the cavity (102) that is used to form the low pressure oil guide chamber along axial direction; Valve pocket (2) lower inside perisporium is provided with and can cooperates the step (204) that forms sealing surface with spool (1).
5. a kind of two-bit triplet pilot operated directional control valve according to claim 4; It is characterized in that said spool (1) lower end is axially arranged with cylindrical stepped boss (103); Said Returnning spring (5) one ends are sleeved on the stepped boss (103), are respectively equipped with chamfering (1031), (2041) that when both cooperate, can form cone seal on the stepped boss (103) of said spool (1) and the step (204) of valve pocket (2).
6. a kind of two-bit triplet pilot operated directional control valve according to claim 5 is characterized in that the stepped circular body that said valve pocket (2) reduces for external diameter from top to bottom step by step.
7. according to each described a kind of two-bit triplet pilot operated directional control valve of claim 4 to 6, it is characterized in that described upward valve opening (201) is 6, be arranged symmetrically on the circumference of valve pocket (2).
8. according to each described a kind of two-bit triplet pilot operated directional control valve of claim 4 to 6, it is characterized in that described middle valve opening (202) is 6, be arranged symmetrically on the circumference of valve pocket (2).
9. according to each described a kind of two-bit triplet pilot operated directional control valve of claim 4 to 6; It is characterized in that described valve opening (203) down is 7; Wherein there are 6 sizes identical; Circularize arranged in arrays on valve pocket (2) downside end face, another bore is bigger, is arranged on valve pocket (2) downside end face middle part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201832609U CN202100404U (en) | 2011-05-27 | 2011-05-27 | High-efficiency conveying system of concrete or coal slime and two-position three-way liquid control reversing valves utilized by same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201832609U CN202100404U (en) | 2011-05-27 | 2011-05-27 | High-efficiency conveying system of concrete or coal slime and two-position three-way liquid control reversing valves utilized by same |
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| Publication Number | Publication Date |
|---|---|
| CN202100404U true CN202100404U (en) | 2012-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201832609U Expired - Lifetime CN202100404U (en) | 2011-05-27 | 2011-05-27 | High-efficiency conveying system of concrete or coal slime and two-position three-way liquid control reversing valves utilized by same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213201A (en) * | 2011-05-27 | 2011-10-12 | 秦月明 | High-efficiency concrete or coal slurry conveying system, control method thereof, and two-position three-way hydraulically-controlled directional control valve applied to high-efficiency concrete or coal slurry conveying system |
-
2011
- 2011-05-27 CN CN2011201832609U patent/CN202100404U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213201A (en) * | 2011-05-27 | 2011-10-12 | 秦月明 | High-efficiency concrete or coal slurry conveying system, control method thereof, and two-position three-way hydraulically-controlled directional control valve applied to high-efficiency concrete or coal slurry conveying system |
| CN102213201B (en) * | 2011-05-27 | 2014-02-26 | 秦月明 | High-efficiency concrete or coal slurry conveying system, control method thereof, and two-position three-way hydraulically-controlled directional control valve applied to high-efficiency concrete or coal slurry conveying system |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20120104 Effective date of abandoning: 20140226 |
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