CN109779984A - Metal scrap briquetting machine compression hydraulic cylinder control loop - Google Patents
Metal scrap briquetting machine compression hydraulic cylinder control loop Download PDFInfo
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- CN109779984A CN109779984A CN201811555700.1A CN201811555700A CN109779984A CN 109779984 A CN109779984 A CN 109779984A CN 201811555700 A CN201811555700 A CN 201811555700A CN 109779984 A CN109779984 A CN 109779984A
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- 230000006835 compression Effects 0.000 title claims abstract description 234
- 238000007906 compression Methods 0.000 title claims abstract description 234
- 239000002184 metal Substances 0.000 title claims abstract description 33
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 33
- 239000007788 liquid Substances 0.000 claims abstract description 76
- 239000002828 fuel tank Substances 0.000 claims abstract description 40
- 238000000034 method Methods 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims abstract description 12
- 239000000446 fuel Substances 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims 1
- 239000003921 oil Substances 0.000 description 216
- 230000006872 improvement Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000005611 electricity Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 239000010727 cylinder oil Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
Abstract
The invention discloses a kind of metal scrap briquetting machine compression hydraulic cylinder control loop, the oil return line of fuel tank is delivered to including the main oil feed line for the rodless cavity delivering oil to compression cylinder, the oil liquid that is delivered to for the oil liquid in the rod chamber by compression cylinder the secondary oil feed line of the rodless cavity of compression cylinder and is used in the rod chamber by compression cylinder；Compression cylinder fast phase, starts main oil feed line and secondary oil feed line, and the oil liquid in the main oil feed line and secondary oil feed line pushes compression cylinder to move simultaneously；Advanced section of compression cylinder work, start main oil feed line and oil return line, the oil liquid in the main oil feed line individually pushes compression cylinder to move.Using the present invention, the driving pressure of the differential advance process of compression cylinder can be reduced.
Description
Technical field
The present invention relates to technical field of hydraulic pressure more particularly to a kind of metal scrap briquetting machine compression hydraulic cylinder control loops.
Background technique
Efficient metal bits cuber is a kind of without that can add various metals in machine in the case where adding any auxiliary material
Generated various metal fillings, particle, powder etc., the mechanical equipment of briquet in work technique.
As shown in Figure 1, compression hydraulic cylinder mainly includes pre- pressure cylinder 1 ', pre- compression mold cavities 2 ', compression die cavity 3 ', punch-pin 4 ' and lives
Stopper rod 5 ' has the design of following two key: 1, pre- pressure cylinder 1 ' and precompressed to guarantee that cuber has higher efficiency and yield
Die cavity 2 ' need to be designed sufficiently large, so that metal fillings can be filled into pre- compression mold cavities 2 ' with lacking obstacle as far as possible, so oil cylinder
Stroke is long；2, the cylinder diameter of compression cylinder need to be designed bigger, the piston rod 5 ' of compression cylinder can just obtain biggish
Metal fillings is compressed into the block objects that density meets design requirement by thrust.
Fig. 2 is existing hydraulic system working principle diagram, and the course of work is as follows: electro-hydraulic when oil cylinder inlet wire circle S1 ' obtains electric
The spool of reversal valve 6 ' is in left position, and all flows that motor 7 ' drives hydraulic pump 8 ' to export are entered by electro-hydraulic reversing valve 6 '
The rodless cavity 9 ' of compression cylinder, to carry out compressed action.And according to original hydraulic system working principle, and according to retouching above
Flow rate of hydraulic system Q need to be adjusted to quite big, can just meet the requirement of duty cycle by two key Designs stated；Liquid simultaneously
It presses system pressure P opposite and bigger, compression pressure (i.e. cylinder thrust) can be made sufficiently large.It is calculated according to hydraulic power public
Formula: W=P × Q, the i.e. output power of hydraulic pump must be sufficiently large, therefore the 7 ' power of motor of hydraulic pump is driven to be also required to foot
It is enough big, it just can guarantee the production capacity of machine.
Meanwhile the process of compression cylinder retract action are as follows: oil cylinder move back coil S2 ' it is electric when, the spool of electro-hydraulic reversing valve 6 '
In right position, all flows that hydraulic pump 8 ' exports enter the rod chamber 10 ' of compression cylinder by electro-hydraulic reversing valve 6 ', push oil
Cylinder piston rod 5 ' is retracted into oil cylinder bottom, and the oil liquid of rodless cavity 9 ' returns to oil using cooler 11 ' by electro-hydraulic reversing valve 6 '
In case 12 '.During this, the pressure loss includes local pressure loss and loses along stroke pressure, specifically:
Local pressure loss formula are as follows:
Formula is lost along stroke pressure are as follows:
Wherein, ξ is coefficient of partial resistance, and ρ is oil density, and v is mean flow rate, and l is length of straight pipe, and d is tubing internal diameter, λ
For frictional resistant coefficient.According to above formula it is found that in the identical situation of caliber, by flow it is bigger, then it is average in pipe
Flow velocity v is bigger, the local pressure loss of oil liquid and along stroke pressure loss all can be bigger, so as to cause compression cylinder retract action
Driving pressure is very big.According to hydraulic power calculation formula: W=PQ provides the electronic of power to hydraulic system in the process
Chance is at full capacity or overload operation.
From the foregoing, it will be observed that existing hydraulic system has the disadvantage in that
1, drive motor power is big, is easy overloading often occur, or serious overloading occur, shortens its use
Service life influences client's use；
2, energy loss is big, and the oil liquid temperature rate of climb is fast, need to increase cooler specification, make added cost；
3, energy loss is big, i.e. machine whole efficiency is not high, and energy-saving effect is not good enough, and client's use cost increases；
4, since flow rate of hydraulic system is larger, oil liquid can also be increased by energy loss caused by Hydraulic Elements, required
Motor power (output) it is just bigger, therefore the adjustable surplus of whole system is with regard to very limited.
Summary of the invention
Technical problem to be solved by the present invention lies in provide a kind of simple metal scrap briquetting machine compression hydraulic cylinder of structure
Control loop can reduce the driving pressure of the differential advance process of compression cylinder.
The technical problems to be solved by the invention also reside in, and provide a kind of metal scrap briquetting machine compression hydraulic cylinder and control back
Road can reduce the driving pressure that compression cylinder retracts process.
In order to solve the above-mentioned technical problems, the present invention provides a kind of metal scrap briquetting machine compression hydraulic cylinder control loop,
Including for main oil feed line from the rodless cavity delivering oil to compression cylinder, for the oil liquid in the rod chamber by compression cylinder
It is delivered to the secondary oil feed line of the rodless cavity of compression cylinder and the oil liquid in the rod chamber by compression cylinder is delivered to oil
The oil return line of case；Compression cylinder fast phase, starts the main oil feed line and secondary oil feed line, the main oil feed line and
Oil liquid in secondary oil feed line pushes compression cylinder to move simultaneously；Advanced section of compression cylinder work, start the main oil feed line and
Oil return line, the oil liquid in the main oil feed line individually push compression cylinder to move.
As an improvement of the above scheme, the metal scrap briquetting machine compression hydraulic cylinder control loop include motor, it is hydraulic
Pump, electro-hydraulic reversing valve, compression cylinder and fuel tank；Compression cylinder fast phase and advanced section of compression cylinder work, the motor, liquid
The rodless cavity of press pump, electro-hydraulic reversing valve and compression cylinder is sequentially communicated to constitute main oil feed line；Compression cylinder fast phase, institute
The rodless cavity for stating the rod chamber of compression cylinder, electro-hydraulic reversing valve and compression cylinder is sequentially communicated to constitute secondary oil feed line；Compression
Advanced section of oil cylinder work, rod chamber, electro-hydraulic reversing valve and the fuel tank of the compression cylinder are sequentially communicated to constitute oil return line.
As an improvement of the above scheme, the metal scrap briquetting machine compression hydraulic cylinder control loop further includes the first inserted valve
And the first solenoid directional control valve for controlling first inserted valve；Compression cylinder fast phase, first solenoid directional control valve
Obtain electric so that the first inserted valve is closed, two actuator ports of first inserted valve disconnect, the rod chamber of the compression cylinder,
The rodless cavity of electro-hydraulic reversing valve and compression cylinder is sequentially communicated to constitute secondary oil feed line；Advanced section of compression cylinder work, described
One solenoid directional control valve power loss is so that the first inserted valve is opened, and two actuator ports of first inserted valve are connected to, the compression
Rod chamber, electro-hydraulic reversing valve, the first inserted valve and the fuel tank of oil cylinder are sequentially communicated to constitute oil return line.
As an improvement of the above scheme, pass through between the oil return opening of the electro-hydraulic reversing valve and the control mouth of the first inserted valve
The connection of first solenoid directional control valve；When first solenoid directional control valve obtains electric, the oil liquid in the oil return opening of the electro-hydraulic reversing valve is logical
The control mouth that the first solenoid directional control valve flows to the first inserted valve is crossed, the control mouth of first inserted valve is pressurized so that the first inserting
Valve is closed；When the first solenoid directional control valve power loss, the oil return opening and of the electro-hydraulic reversing valve is truncated in first solenoid directional control valve
The control mouth of access between the control mouth of one inserted valve, first inserted valve is not pressurized so that the first inserted valve is opened.
As an improvement of the above scheme, the metal scrap briquetting machine compression hydraulic cylinder control loop further includes check valve, fastly
The fast stage, the rod chamber of the compression cylinder, electro-hydraulic reversing valve, check valve and compression cylinder rodless cavity be sequentially communicated to constitute
Secondary oil feed line.
As an improvement of the above scheme, in compression cylinder course of exerting pressure, punch-pin sequentially enters pre- compression mold cavities and compression die cavity,
Before punch-pin enters compression die cavity, compression cylinder is converted by compression cylinder fast phase to advanced section of compression cylinder work.
As an improvement of the above scheme, the metal scrap briquetting machine compression hydraulic cylinder control loop further includes for compression
The retraction oil feed line of the rod chamber delivering oil of oil cylinder is delivered to fuel tank for the oil liquid in the rodless cavity by compression cylinder
Main retraction oil return line and secondary retraction oil return line；Compression cylinder retracts stage, starting retraction oil feed line, main retraction oil return pipe
Road and secondary retraction oil return line, the main retraction oil return line and secondary retraction oil return pipe simultaneously will be in the rodless cavities of compression cylinder
Oil liquid is delivered to fuel tank.
As an improvement of the above scheme, compression cylinder retracts stage, the motor, hydraulic pump, electro-hydraulic reversing valve and pressure
The rod chamber of contracting oil cylinder is sequentially communicated to constitute retraction oil feed line, rodless cavity, electro-hydraulic reversing valve and the oil of the compression cylinder
Case is sequentially communicated to constitute main retraction oil return line, and rodless cavity and the fuel tank connection of the compression cylinder are to constitute secondary retraction oil return
Pipeline.
As an improvement of the above scheme, the secondary retraction oil return line further includes the second inserted valve and for controlling described the
Second solenoid directional control valve of two inserted valves；Compression cylinder retracts the stage, and second solenoid directional control valve obtains electric so that the second inserting
Valve is opened, two actuator ports connection of second inserted valve, the rodless cavity of the compression cylinder, the second inserted valve and fuel tank
It is sequentially communicated to constitute secondary retraction oil return line.
As an improvement of the above scheme, by the between the rodless cavity of the compression cylinder and the control mouth of the second inserted valve
The connection of two solenoid directional control valves；When second solenoid directional control valve obtains electric, the oil liquid in the control mouth of second inserted valve passes through
Second solenoid directional control valve flows to fuel tank, and the control mouth of second inserted valve is not pressurized so that the second inserted valve is opened.
The beneficial effects of the practice of the present invention is:
The present invention combines the first inserted valve and the first solenoid directional control valve to constitute differential valve group, will can need to flow originally
The oil liquid of oil return box, the method by changing its flow direction, re-uses into hydraulic actuating mechanism, can effectively ensure that in same flow
Under the situation of amount, the driving pressure of the differential advance process of compression cylinder can be reduced；From oil return line, the cloth for oil valve of being more convenient for
Office saves assembly space.
In addition, the present invention combines the second inserted valve and the second solenoid directional control valve to constitute oil return valve group, due to second
The coefficient of partial resistance of inserted valve is smaller than electro-hydraulic reversing valve, and under the situation of same flow, oil return valve group compares electro-hydraulic reversing valve
Pressure drop it is lower, can effectively reduce oil liquid it is main retraction oil returning tube in flow velocity, further decrease compression cylinder retract process
Driving pressure, to reduce the pressure loss.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of existing compression hydraulic cylinder；
Fig. 2 is existing hydraulic system working principle diagram；
Fig. 3 is the schematic structural diagram of the first embodiment of metal scrap briquetting machine compression hydraulic cylinder control loop of the present invention；
Fig. 4 is the schematic structural diagram of the second embodiment of metal scrap briquetting machine compression hydraulic cylinder control loop of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made into one below in conjunction with attached drawing
Step ground detailed description.Only this is stated, the present invention occurs in the text or will occur up, down, left, right, before and after, it is inside and outside etc. just
Position word is not to specific restriction of the invention only on the basis of attached drawing of the invention.
The first embodiment of metal scrap briquetting machine compression hydraulic cylinder control loop of the present invention is shown referring to Fig. 3, Fig. 3,
Including for main oil feed line from 1 delivering oil of rodless cavity to compression cylinder, for the oil in the rod chamber 2 by compression cylinder
Liquid is delivered to the secondary oil feed line without 1 chamber of bar of compression cylinder and for the oil liquid conveying in the rod chamber 2 by compression cylinder
To the oil return line of fuel tank 3.
It should be noted that the course of exerting pressure of compression cylinder can be divided into compression cylinder fast phase and compression in the present invention
Advanced section of oil cylinder work.As shown in Figure 1, in compression cylinder fast phase, the movement in pre- compression mold cavities 2 ' of punch-pin 4 '；In compression cylinder
Advanced section of work, the movement in compression die cavity 3 ' of punch-pin 4 '.Since in compression cylinder fast phase, compression cylinder cannot have biggish
Load, compression cylinder will need to switch to advanced section of compression cylinder work that can bear heavy load, that is, exist before formally starting binder
Punch-pin 4 ' will complete compression cylinder fast phase to advanced section of compression cylinder work of switching before entering compression die cavity 3 '.Therefore,
In compression cylinder course of exerting pressure, punch-pin 4 ' sequentially enters pre- compression mold cavities 2 ' and compression die cavity 3 ', and punch-pin 4 ' enters compression die cavity 3 '
Before, compression cylinder is converted by compression cylinder fast phase to advanced section of compression cylinder work.
Unlike the prior art, secondary oil feed line is increased in the present invention.Compression cylinder fast phase starts main confession
Oil pipe line and secondary oil feed line, main oil feed line is to 1 delivering oil of rodless cavity of compression cylinder, while secondary oil feed line will be originally
The oil liquid for needing to flow to fuel tank 3 is drained to the rodless cavity 1 of compression cylinder from the rod chamber 2 of compression cylinder, realizes main fuel feed pump
The effect that oil liquid in road and secondary oil feed line pushes compression cylinder to move simultaneously；Advanced section of compression cylinder work, start main fuel feeding
Pipeline and oil return line, main oil feed line is to 1 delivering oil of rodless cavity of compression cylinder, while oil return line is directly by compressed oil
Oil liquid in the rod chamber 2 of cylinder is delivered to fuel tank 3, realizes the oil liquid in main oil feed line and compression cylinder is individually pushed to move
Effect.
From the foregoing, it will be observed that the present invention can guarantee oil liquid flow by working while main oil feed line and secondary oil feed line
In lower situation, the thrust to the piston rod 4 of compression cylinder is increased, so that the speed of compression cylinder advance is improved, thus slow
The big problem of required motor power (output) is solved, to solve original hydraulic system disadvantage bring variety of problems.
As shown in figure 3, the metal scrap briquetting machine compression hydraulic cylinder control loop includes motor 5, hydraulic pump 6, electricity
Liquid reversal valve 7, compression cylinder (1,2,4) and fuel tank 3；Wherein, the motor 5, hydraulic pump 6, electro-hydraulic reversing valve 8 and compressed oil
The rodless cavity 1 of cylinder can be sequentially communicated to constitute main oil feed line；Rod chamber 2, electro-hydraulic reversing valve 7 and the compression of the compression cylinder
The rodless cavity 1 of oil cylinder can be sequentially communicated to constitute secondary oil feed line；Rod chamber 2, electro-hydraulic reversing valve 7 and the oil of the compression cylinder
Case 3 can be sequentially communicated to constitute oil return line.
Compression cylinder fast phase: the oil cylinder inlet wire circle S1 of electro-hydraulic reversing valve 7 obtains electric, and the spool of electro-hydraulic reversing valve 7 is in
Left position；At this point, main oil feed line and secondary oil feed line connection, oil return line disconnect, all oil liquid that hydraulic pump 6 exports pass through electricity
Liquid reversal valve 7 enters the rodless cavity 1 of compression cylinder, and the oil liquid of the rod chamber 2 of compression cylinder enters pressure by electro-hydraulic reversing valve 7
The rodless cavity 1 of contracting oil cylinder, therefore, the oil liquid of main oil feed line and secondary oil feed line enter the rodless cavity 1 one of compression cylinder simultaneously
It rises and compression cylinder is pushed to fast forward through.
Advanced section of compression cylinder work: the oil cylinder inlet wire circle S1 of electro-hydraulic reversing valve 7 obtains electric, and the spool of electro-hydraulic reversing valve 7 is in
Left position；At this point, main oil feed line and oil return line connection, secondary oil feed line disconnect, all oil liquid that hydraulic pump 6 exports pass through electricity
Liquid reversal valve 7 enters the rodless cavity 1 of compression cylinder, and the oil liquid of the rod chamber 2 of compression cylinder enters oil by electro-hydraulic reversing valve 7
Case 3 realizes the independent fuel feeding of main oil feed line.
Correspondingly, the metal scrap briquetting machine compression hydraulic cylinder control loop further includes the first inserted valve 8 and for controlling
Make the first solenoid directional control valve 9 of first inserted valve 8.
Compression cylinder fast phase: the oil cylinder inlet wire circle S1 of electro-hydraulic reversing valve 7 obtains electric, and the spool of electro-hydraulic reversing valve 7 is in
Left position, all oil liquid that hydraulic pump 6 exports enter the rodless cavity 1 of compression cylinder by electro-hydraulic reversing valve 7；At this point, described first
Solenoid directional control valve 9 obtains electric so that the first inserted valve 7 is closed, and two actuator ports (A3, B3) of first inserted valve 7 disconnect,
The rodless cavity 1 of the rod chamber 2 of the compression cylinder, electro-hydraulic reversing valve 7 and compression cylinder is sequentially communicated to constitute secondary oil feed line.
Advanced section of compression cylinder work: the oil cylinder inlet wire circle S1 of electro-hydraulic reversing valve 7 obtains electric, and the spool of electro-hydraulic reversing valve 7 is in
Left position, all oil liquid that hydraulic pump 6 exports enter the rodless cavity 1 of compression cylinder by electro-hydraulic reversing valve 7；At this point, described first
So that the first inserted valve 8 is opened, two actuator ports (A3, B3) of first inserted valve 8 are connected to 9 power loss of solenoid directional control valve,
Rod chamber, electro-hydraulic reversing valve 7, the first inserted valve 8 and the fuel tank 3 of the compression cylinder 2 are sequentially communicated to constitute oil return line.
Specifically, pass through the first electricity between the oil return inlet T 1 of the electro-hydraulic reversing valve 7 and the control mouth X3 of the first inserted valve 8
Magnetic reversal valve 9 connects；When first solenoid directional control valve 9 obtains electric, the oil liquid in the oil return inlet T 1 of the electro-hydraulic reversing valve 7 passes through
First solenoid directional control valve 9 flows to the control mouth X3 of the first inserted valve 8, and the control mouth X3 of first inserted valve 8 is pressurized so that the
One inserted valve 8 is closed；When the first 9 power loss of solenoid directional control valve, the electro-hydraulic reversing valve 7 is truncated in first solenoid directional control valve 9
The control mouth X3 of access between oil return inlet T 1 and the control mouth X3 of the first inserted valve 8, first inserted valve 8 be not pressurized so that
First inserted valve 8 is opened.
Further, the metal scrap briquetting machine compression hydraulic cylinder control loop further includes check valve 10, and fast phase is described
The rod chamber 2 of compression cylinder, electro-hydraulic reversing valve 7, check valve 10 and compression cylinder rodless cavity 1 be sequentially communicated to constitute secondary fuel feeding
Pipeline.
It is described in further detail below with reference to course of exerting pressure of the Fig. 3 to compression cylinder.
Compression cylinder fast phase: the oil cylinder inlet wire circle S1 of electro-hydraulic reversing valve 7 obtains electric, and the spool of electro-hydraulic reversing valve 7 is in
Left position, all oil liquid that hydraulic pump 6 exports enter the rodless cavity 1 of compression cylinder by electro-hydraulic reversing valve 7, and compression cylinder has bar
Oil liquid in chamber 2 flows to oil return inlet T 1 by the actuator port B1 of electro-hydraulic reversing valve 7；Meanwhile first solenoid directional control valve 9 it is differential
Coil S3 obtains electric, and the spool of the first solenoid directional control valve 9 is in right position, and the oil liquid in 7 oil return inlet T 1 of electro-hydraulic reversing valve passes through first
The pressure oil port P2 of solenoid directional control valve 9 flows to the control mouth X3 of the first inserted valve 8 and sets up pressure, closes the first inserted valve 8
It closes, oil liquid then cannot flow to fuel tank 3 from the actuator port A3 of the first inserted valve 8 toward actuator port B3, therefore oil liquid can only be from list
The rodless cavity 1 for entering compression cylinder to valve 10 pushes oil cylinder to fast forward through together.
Advanced section of compression cylinder work: the oil cylinder inlet wire circle S1 of electro-hydraulic reversing valve 7 obtains electric, and the spool of electro-hydraulic reversing valve 7 is in
Left position, all oil liquid that hydraulic pump 6 exports enter the rodless cavity 1 of compression cylinder by electro-hydraulic reversing valve 7, and compression cylinder has bar
Oil liquid in chamber 2 flows to oil return inlet T 1 by the actuator port B1 of electro-hydraulic reversing valve 7；Meanwhile first solenoid directional control valve 9 it is differential
Coil S3 must not be electric, and the spool of the first solenoid directional control valve 9 is in left position, and the oil liquid in electro-hydraulic reversing valve oil return inlet T 1 can not pass through
First solenoid directional control valve 9 flows to the control mouth X3 of the first inserted valve 8, and the first inserted valve 8 is opened, therefore 7 oil return of electro-hydraulic reversing valve
Oil liquid in mouth T1 flow to fuel tank 3 from the hydraulic fluid port of the first inserted valve 8 work A3 toward actuator port B3.
Further, it can be equipped with limit switch in the pre- compression mold cavities 2 ', when punch-pin 4 ' reaches the position of limit switch, limit
Bit switch driving compression cylinder is converted by fast phase to advanced section of work (referring to Fig. 1).Specifically, it can be controlled by limit switch
First solenoid directional control valve 9 obtains electric or power loss, so that compression cylinder switches between advanced section of fast phase and work.
From the foregoing, it will be observed that combine the first inserted valve 8 and the first solenoid directional control valve 9 to constitute differential valve group in the present invention,
The oil liquid that will can need to flow back to fuel tank originally, the method by changing its flow direction, re-uses into hydraulic actuating mechanism, can have
Effect guarantees under the situation of same flow, can reduce the driving pressure of the differential advance process of compression cylinder；From oil return line,
It is more convenient for the layout of oil valve, saves assembly space.
Referring to fig. 4, Fig. 4 shows the second embodiment of metal scrap briquetting machine compression hydraulic cylinder control loop of the present invention, with
It further include for 2 delivering oil of rod chamber to compression cylinder in the present embodiment unlike first embodiment shown in Fig. 3
Retraction oil feed line, the main retraction oil return line that fuel tank 3 is delivered to for the oil liquid in the rodless cavity 1 by compression cylinder and secondary time
Retract oil pipe line K.
It should be noted that need to bounce back and piston rod 4 is subjected to retraction processing after compression cylinder completes course of exerting pressure, with
It is convenient for pressure next time.Compression cylinder retracts stage, starting retraction oil feed line, main retraction oil return line and secondary retraction
Oil return line K, the main retraction oil return line and secondary retraction oil return pipe K are defeated by the oil liquid in the rodless cavity 1 of compression cylinder simultaneously
It send to fuel tank 3.
Unlike the prior art, controllable secondary retraction oil return line K is increased in the present invention, in the work of compression cylinder
In the process that stopper rod 4 retracts, the oil liquid of the rodless cavity 1 of compression cylinder is discharged to oil by newly-increased secondary retraction oil return line K
In case 3, the oil liquid flow flowed back into fuel tank 3 by electro-hydraulic reversing valve 7 is greatly reduced, to solve the nothing of pressure oil tank
The too fast problem of 1 oil return flow velocity of rod cavity.
As shown in figure 4, compression cylinder retracts stage, the motor 5, hydraulic pump 6, electro-hydraulic reversing valve 7 and compression cylinder
Rod chamber 2 be sequentially communicated to constitute retraction oil feed line, rodless cavity 1, electro-hydraulic reversing valve 7 and the fuel tank 3 of the compression cylinder
It is sequentially communicated to constitute main retraction oil return line, rodless cavity 1 and fuel tank 3 connection of the compression cylinder are to constitute secondary retraction oil return
Pipeline.
Compression cylinder retracts the stage: the oil cylinder of electro-hydraulic reversing valve 7 moves back coil S2 and obtains electric, and the spool of electro-hydraulic reversing valve 7 is in
Right position；At this point, main oil feed line, secondary oil feed line and oil return line disconnect, bounce back oil feed line and main retraction oil return line company
Logical, all oil liquid that hydraulic pump 6 exports enter the rod chamber 3 of compression cylinder, the rodless cavity of compression cylinder by electro-hydraulic reversing valve 7
Oil liquid in 1 flows to oil return inlet T 1 by the actuator port A1 of electro-hydraulic reversing valve 7, then flow to fuel tank 3 by oil return inlet T 1；Meanwhile
Pair retraction oil return line K is connected to, and the oil liquid in the rodless cavity 1 of compression cylinder is discharged in fuel tank 3 by pair retraction oil return line K.
Correspondingly, the secondary retraction oil return line K further includes the second inserted valve 11 and for controlling second inserted valve
11 the second solenoid directional control valve 12.
Compression cylinder retracts the stage: the oil cylinder of electro-hydraulic reversing valve 7 moves back coil S2 and obtains electric, and the spool of electro-hydraulic reversing valve 7 is in
Right position, hydraulic pump 6 export all oil liquid by electro-hydraulic reversing valve 7 enter compression cylinder rod chamber 2, compression cylinder without bar
Oil liquid in chamber 1 flows to oil return inlet T 1 by the actuator port A1 of electro-hydraulic reversing valve 7, then flow to fuel tank 3 by oil return inlet T 1；Together
When, second solenoid directional control valve 12 obtains electric so that the unlatching of the second inserted valve 11, two working oils of second inserted valve 11
Mouth (A4, B4) connection, the rodless cavity 1 of the compression cylinder, the second inserted valve 11 and fuel tank 3 are sequentially communicated to constitute pair and bounce back back
Oil pipe line, so that the oil liquid in the rodless cavity 1 of compression cylinder is discharged in fuel tank 3 by the second inserted valve 11.
Specifically, pass through the second electromagnetism between the rodless cavity 1 of the compression cylinder and the control mouth X4 of the second inserted valve 11
Reversal valve 12 connects；When second solenoid directional control valve 12 obtains electric, the oil liquid in the control mouth X4 of second inserted valve 11 is logical
It crosses the second solenoid directional control valve 12 and flows to fuel tank, the control mouth X4 of second inserted valve 11 is not pressurized so that the second inserted valve 11 is opened
It opens.
Process is retracted to compression cylinder below with reference to Fig. 4 to be described in further detail.
Compression cylinder retracts the stage, and the oil cylinder of electro-hydraulic reversing valve 7 moves back coil S2 and obtains electric, and the spool of electro-hydraulic reversing valve 7 is in
Right position, hydraulic pump 6 export all oil liquid by electro-hydraulic reversing valve 7 enter compression cylinder rod chamber 2, compression cylinder without bar
Oil liquid in chamber 1 flows to oil return inlet T 1 by the actuator port A1 of electro-hydraulic reversing valve 7, then flow to fuel tank 3 by oil return inlet T 1；Together
When, the auxiliary of the second solenoid directional control valve 12 moves back coil S4 and obtains electric, and the spool of the second solenoid directional control valve 12 is in right position, the second inserting
Oil liquid in the control mouth X4 of valve 11 flows to pressure oil port P5 by the actuator port B5 of the second solenoid directional control valve 12 and returns to oil
In case 3, the control mouth X4 of the second inserted valve 11 is not pressurized, and opens the second inserted valve 11, oil liquid is then from compression cylinder without bar
Chamber flows back to fuel tank 3 toward actuator port B4 along the actuator port A4 of the second inserted valve 11, then is equivalent to the rodless cavity 1 for compression cylinder
Oil liquid increase newly an oil returning tube.Therefore, it can be largely reduced by the flow of 7 oil return of electro-hydraulic reversing valve, the oil liquid in pipeline
Flow velocity also can be reduced accordingly, thus local pressure loss and along stroke pressure loss can all reduce, thus considerably reduce pressure
The driving pressure of contracting oil cylinder retract action.
It should be noted that retracting the stage in compression cylinder, the differential coil S3 of the first solenoid directional control valve 9 must not be electric, the
The spool of one solenoid directional control valve 9 is in left position, and the oil liquid in 7 oil return inlet T 1 of electro-hydraulic reversing valve can not pass through the first solenoid directional control valve
9 flow to the control mouth X3 of the first inserted valve 8, and the first inserted valve X3 is opened, thus the oil liquid in 7 oil return inlet T 1 of electro-hydraulic reversing valve from
The hydraulic fluid port work A3 of first inserted valve 8 flow to fuel tank 3 toward actuator port B3.Correspondingly, in the course of exerting pressure of compression cylinder (i.e.
Compression cylinder fast phase and advanced section of compression cylinder work), the auxiliary of the second solenoid directional control valve 12 moves back coil S4 power loss, the second electricity
The spool of magnetic reversal valve 12 is in left position, and the control mouth X4 of the second inserted valve 11 is pressurized, and closes the second inserted valve 11, i.e., secondary to return
Oil pipe line K is retracted to close.
From the foregoing, it will be observed that the second inserted valve 11 and the second solenoid directional control valve 12 are combined to constitute oil return valve in the present invention
Group, since the coefficient of partial resistance of the second inserted valve 11 is smaller than electro-hydraulic reversing valve 7, under the situation of same flow, oil return valve
Group is lower than the pressure drop of electro-hydraulic reversing valve 7, can effectively reduce flow velocity of the oil liquid in main retraction oil returning tube, further decreases pressure
Contracting oil cylinder retracts the driving pressure of process, to reduce the pressure loss.
In conclusion the invention has the following advantages:
(1) overloading is reduced, or overload can increase the service life of motor within tolerance range, reduce to visitor
The influence at family；
(2) spill losses of system is reduced, oil temperature can control more preferably, without increasing cooler specification；
(3) energy-saving effect is promoted, client's use cost is reduced；
(4) system has more sufficient surplus adjustable, when encountering special circumstances, more can guarantee its stability, reliability.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (10)
1. a kind of metal scrap briquetting machine compression hydraulic cylinder control loop, which is characterized in that including for compression cylinder without bar
The main oil feed line of chamber delivering oil is delivered to the rodless cavity of compression cylinder for the oil liquid in the rod chamber by compression cylinder
Secondary oil feed line and the oil return line that fuel tank is delivered to for the oil liquid in the rod chamber by compression cylinder；
Compression cylinder fast phase starts the main oil feed line and secondary oil feed line, the main oil feed line and secondary fuel feed pump
Oil liquid in road pushes compression cylinder to move simultaneously；
Advanced section of compression cylinder work, start the main oil feed line and oil return line, the oil liquid in the main oil feed line is independent
Push compression cylinder movement.
2. metal scrap briquetting machine compression hydraulic cylinder control loop as described in claim 1, which is characterized in that including motor,
Hydraulic pump, electro-hydraulic reversing valve, compression cylinder and fuel tank；
Compression cylinder fast phase and advanced section of compression cylinder work, the motor, hydraulic pump, electro-hydraulic reversing valve and compression cylinder
Rodless cavity be sequentially communicated to constitute main oil feed line；
The rodless cavity of compression cylinder fast phase, the rod chamber of the compression cylinder, electro-hydraulic reversing valve and compression cylinder successively connects
Pass to the secondary oil feed line of composition；
Advanced section of compression cylinder work, rod chamber, electro-hydraulic reversing valve and the fuel tank of the compression cylinder are sequentially communicated to constitute oil return
Pipeline.
3. metal scrap briquetting machine compression hydraulic cylinder control loop as claimed in claim 2, which is characterized in that further include first slotting
Fill valve and the first solenoid directional control valve for controlling first inserted valve；
Compression cylinder fast phase, first solenoid directional control valve obtain electric so that the closing of the first inserted valve, first inserted valve
Two actuator ports disconnect, the rodless cavity of the rod chamber of the compression cylinder, electro-hydraulic reversing valve and compression cylinder is sequentially communicated
To constitute secondary oil feed line；
Advanced section of compression cylinder work, the first solenoid directional control valve power loss is so that the unlatching of the first inserted valve, first inserted valve
Two actuator ports connection, rod chamber, electro-hydraulic reversing valve, the first inserted valve and the fuel tank of the compression cylinder be sequentially communicated with
Constitute oil return line.
4. metal scrap briquetting machine compression hydraulic cylinder control loop as claimed in claim 3, which is characterized in that the electro-hydraulic commutation
It is connected between the oil return opening of valve and the control mouth of the first inserted valve by the first solenoid directional control valve；
When first solenoid directional control valve obtains electric, the oil liquid in the oil return opening of the electro-hydraulic reversing valve passes through the first solenoid directional control valve
The control mouth of the first inserted valve is flowed to, the control mouth of first inserted valve is pressurized so that the first inserted valve is closed；
When the first solenoid directional control valve power loss, first solenoid directional control valve is truncated the oil return opening of the electro-hydraulic reversing valve and first and inserts
The access between the control mouth of valve is filled, the control mouth of first inserted valve is not pressurized so that the first inserted valve is opened.
5. such as the described in any item metal scrap briquetting machine compression hydraulic cylinder control loops of claim 2~4, which is characterized in that also
Including check valve, fast phase, the rod chamber of the compression cylinder, electro-hydraulic reversing valve, check valve and compression cylinder rodless cavity
It is sequentially communicated to constitute secondary oil feed line.
6. metal scrap briquetting machine compression hydraulic cylinder control loop as described in claim 1, which is characterized in that compression cylinder pressure
In the process, punch-pin sequentially enters pre- compression mold cavities and compression die cavity, and before punch-pin enters compression die cavity, compression cylinder is fast by compression cylinder
Fast phase transition is to advanced section of compression cylinder work.
7. metal scrap briquetting machine compression hydraulic cylinder control loop as described in claim 1, which is characterized in that further include for
The retraction oil feed line of the rod chamber delivering oil of compression cylinder is delivered to oil for the oil liquid in the rodless cavity by compression cylinder
The main retraction oil return line of case and secondary retraction oil return line；
Compression cylinder retracts the stage, and starting retraction oil feed line, main retraction oil return line and secondary retraction oil return line, the master return
It retracts oil pipe line and the oil liquid in the rodless cavity of compression cylinder is delivered to fuel tank simultaneously by secondary retraction oil return pipe.
8. metal scrap briquetting machine compression hydraulic cylinder control loop as claimed in claim 7, which is characterized in that compression cylinder retracts
Stage, the motor, hydraulic pump, electro-hydraulic reversing valve and compression cylinder rod chamber be sequentially communicated to constitute retraction fuel feed pump
Road, rodless cavity, electro-hydraulic reversing valve and the fuel tank of the compression cylinder are sequentially communicated to constitute main retraction oil return line, the compression
Rodless cavity and the fuel tank connection of oil cylinder are to constitute secondary retraction oil return line.
9. metal scrap briquetting machine compression hydraulic cylinder control loop as claimed in claim 8, which is characterized in that the pair bounces back back
Oil pipe line further includes the second inserted valve and the second solenoid directional control valve for controlling second inserted valve；
Compression cylinder retracts the stage, and second solenoid directional control valve obtains electric so that the unlatching of the second inserted valve, second inserted valve
The connection of two actuator ports, the rodless cavity of the compression cylinder, the second inserted valve and fuel tank are sequentially communicated to constitute secondary retraction
Oil return line.
10. metal scrap briquetting machine compression hydraulic cylinder control loop as claimed in claim 9, which is characterized in that the compressed oil
It is connected between the rodless cavity of cylinder and the control mouth of the second inserted valve by the second solenoid directional control valve；
When second solenoid directional control valve obtains electric, the oil liquid in the control mouth of second inserted valve passes through the second solenoid directional control valve
Fuel tank is flowed to, the control mouth of second inserted valve is not pressurized so that the second inserted valve is opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811555700.1A CN109779984A (en) | 2018-12-19 | 2018-12-19 | Metal scrap briquetting machine compression hydraulic cylinder control loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811555700.1A CN109779984A (en) | 2018-12-19 | 2018-12-19 | Metal scrap briquetting machine compression hydraulic cylinder control loop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109779984A true CN109779984A (en) | 2019-05-21 |
Family
ID=66497380
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811555700.1A Pending CN109779984A (en) | 2018-12-19 | 2018-12-19 | Metal scrap briquetting machine compression hydraulic cylinder control loop |
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|---|---|---|---|---|
| CN103573738A (en) * | 2012-08-03 | 2014-02-12 | 波音公司 | Methods and apparatus to control movement of a component |
| CN203532390U (en) * | 2013-10-31 | 2014-04-09 | 长沙中联消防机械有限公司 | Hydraulic cylinder quick motion loop and engineering machine |
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