CN107420363A - The hydraulic system and its method of work of a kind of baling press - Google Patents
The hydraulic system and its method of work of a kind of baling press Download PDFInfo
- Publication number
- CN107420363A CN107420363A CN201710786389.0A CN201710786389A CN107420363A CN 107420363 A CN107420363 A CN 107420363A CN 201710786389 A CN201710786389 A CN 201710786389A CN 107420363 A CN107420363 A CN 107420363A
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- valve
- valve group
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
Abstract
The invention discloses a kind of hydraulic system of baling press, including hydraulic power source, hydraulic power source is connected with the first oil pump and the second oil pump, first oil pump is connected with the first inserting valve group, the connection of the first three-position four-way valve and precompression cylinder, second oil pump is connected with the second inserting valve group, the 3rd inserting valve group and the 4th inserting valve group simultaneously, inserting valve group is connected with the second three-position four-way valve and the 3rd three-position four-way valve, and the second three-position four-way valve is connected with casing cylinder, and the 3rd three-position four-way valve is connected with main cylinder pressure.Cooperation of the invention by inserting valve group and three-position four-way valve; play a part of protecting and controlling oil circuit, precompression cylinder self-movement, can selectively control; casing cylinder and main cylinder pressure play the main auxiliary packing style of work; power resource has been saved, has improved energy use efficiency, multiple control terminals are controlled to oil circuit; ensure the normal break-make of oil circuit in the baling press course of work; it is safer, while the multiple motion stations of baling press are controlled by three cylinder bodies, operation more facilitates.
Description
Technical field
The present invention relates to the control system field of baling press, more specifically, it relates to a kind of hydraulic system of baling press
And its method of work.
Background technology
Baling press is also known as banding machine, tape punch or strapper, ties up product by using strapping or tightens up the side such as perm
The storage that formula carries out product arranges, and avoids product from being scattered in transportation, in order to ensure traveling comfort, generally use liquid
Pressure system is controlled.
In view of the above-mentioned problems, patent announcement number is CN106499684A Chinese patent, it is proposed that a kind of baling press hydraulic pressure
System, including plunger pump and motor, plunger pump are connected with stop valve, choke valve, filter, overflow valve, choke valve and three
Four-way valve is connected, and three-position four-way valve is connected with master cylinders and holding cylinder.The China that patent announcement number is CN104712596 A is specially
Profit, it is proposed that the transport mechanism hydraulic control system of baling press, including hydraulic power source and quantitative hydraulic pump, quantitative hydraulic pump are connected with
Three-position four-way electromagnetic directional valve, reconnection have one-way throttle valve, are finally connected with hydraulic cylinder.
When being packed in above-mentioned patent to other products such as packing box, the irregularities of product, easily cause hydraulic cylinder
Causing to deviate during extruding, extrude situations such as not in place, hydraulic system easily breaks down, although there is protective loop,
It is that packing process is interrupted so that packing flow is elongated, greatly reduces the operating efficiency of baling press.
The content of the invention
Easily broken down for the hydraulic system of original baling press, cause pack efficiency it is low the problem of, the object of the invention
It is to propose a kind of high efficiency, the hydraulic system and its method of work of safer baling press, concrete scheme is as follows：
A kind of hydraulic system of baling press, including hydraulic power source, the hydraulic power source are connected with the first oil pump and the second oil pump；
First oil pump is connected with the first inserting valve group, and the first inserting valve group connects with the first three-position four-way valve, described
First three-position four-way valve is connected with precompression cylinder by one way sequence valve；
Second oil pump is connected with the second inserting valve group, the 3rd inserting valve group and the 4th inserting valve group simultaneously, and described second inserts
Dress valve group, the 3rd inserting valve group and the 4th inserting valve group connects with casing valve group simultaneously, the casing valve group and the
Two three-position four-way valves connect, and second three-position four-way valve is connected with casing cylinder；
It is described second inserting valve group, it is described 3rd inserting valve group and it is described 4th inserting valve group simultaneously again with the 3rd three-position four-way valve
Connection, the 3rd three-position four-way valve are connected with main cylinder pressure, the 3rd inserting valve group and the described 4th by one way sequence valve
Release valve group is connected between inserting valve group and the main cylinder pressure.
Pass through above-mentioned technical proposal, unobstructed, the first three-position four-way valve and the first inserting of the first inserting valve unit protection oil circuit
Valve group controls the motion of precompression cylinder simultaneously, precompression cylinder self-movement, can selectively control, the second inserting valve group, the 3rd inserting
Valve group and the 4th inserting valve group cooperate and control casing cylinder and main cylinder pressure simultaneously, and casing valve group and the second three-position four-way valve are simultaneously
The motion of casing cylinder is controlled, release valve group and the 3rd three-position four-way valve control the motion of main cylinder pressure, have saved power resource simultaneously,
Energy use efficiency is improved, multiple control terminals are controlled to oil circuit, ensure that oil circuit normally leads in the baling press course of work
It is disconnected, it is safer, while the multiple motion stations of baling press are controlled by three cylinder bodies, operation more facilitates.
Further, it is connected between first oil pump and the first three-position four-way valve in parallel with the described first inserting valve group
The 5th inserting valve group.
Pass through above-mentioned technical proposal, the 5th inserting valve group is in parallel with the first inserting valve group, on the one hand plays standby effect, separately
On the one hand the operating oil pressure of precompression cylinder is improved.
Further, the first inserting valve group, the second inserting valve group, the 3rd inserting valve group, the described 4th
Inserting valve group and the 5th inserting valve group include check valve and internal control check valve, the check valve and the internal control check valve
Oil inlet end it is identical, the check valve is communicated with the first oil outlet end, and the internal control check valve is communicated with the second oil outlet end；
The first control oil circuit is provided with the internal control check valve, the first two-position four-way valve is provided with the first control oil circuit
And sequence valve.
Pass through above-mentioned technical proposal, inserting valve group can be controlled to the flow direction of internal hydraulic oil, work as internal one-way valve
Connect, when the first two-position four-way valve starts, internal control check valve is disconnected, and when internal one-way valve is connected, the first two-position four-way valve is not
During startup, internal control check valve is connected, and when internal one-way valve is disconnected, internal control check valve is connected.
Further, the casing valve group includes check valve, is provided with the second control oil circuit in the check valve, and described
Two position three-way valve is provided with two control oil circuits.
Pass through above-mentioned technical proposal, only when simultaneously the two position three-way valve in casing valve group and the second three-position four-way valve start
When, casing cylinder could move, and casing valve group serves the effect of Additional Protection oil circuit.
Further, the release valve group includes the second two-position four-way valve and one-way throttle valve.
Pass through above-mentioned technical proposal, after release valve group starts, release can be carried out in main cylinder pressure uphill process, protects oil circuit
Safety.
Further, the first oil outlet end of the first inserting valve group and the first oil outlet end of the 5th inserting valve group are same
When connected with first three-position four-way valve, the of the second oil outlet end of the first inserting valve group and the 5th inserting valve group
The oil return simultaneously of two oil outlet ends enters hydraulic power source.
Pass through above-mentioned technical proposal, the first inserting valve group and the 5th inserting valve group play control to the first three-position four-way valve simultaneously
Make and use.
Further, it is described second inserting valve group the first oil outlet end, it is described 3rd inserting valve group the first oil outlet end and
First oil outlet end of the 4th inserting valve group connects with the casing valve group and the 3rd three-position four-way valve simultaneously, and the described 3rd inserts
Fill the second oil outlet end of valve group and the second oil outlet end of the 4th inserting valve group connects with second two-position four-way valve simultaneously
Oil return enters hydraulic power source afterwards.
Pass through above-mentioned technical proposal, the second inserting valve group, the 3rd inserting valve group and the 4th inserting valve group are simultaneously to the three or three
Position four-way valve plays control action.
Further, first oil pump includes two hydraulic pumps in parallel, first oil pump be provided with two it is fuel-displaced
Pipeline, second oil pump include three hydraulic pumps in parallel, and second oil pump is provided with three outlet line；
Check valve is provided between the 5th inserting valve group and the first oil pump, between the 4th inserting valve group and the second oil pump
It is provided with check valve.
Pass through above-mentioned technical proposal, multiple outlet line correspond to different inserting valve groups, the oil inlet end of the first inserting valve group
Oil pressure is more than the oil inlet end oil pressure of the 5th inserting valve group, and the second inserting valve group, the 3rd inserting valve group oil inlet end oil pressure are more than the 4th
The oil inlet end oil pressure of valve group is inserted, check valve prevents the outlet line of low oil pressure from oil return occurs, protects oil circuit.
Further, the precompression cylinder is provided with first pressure sensor, institute with the first three-position four-way valve junction
State main cylinder pressure and the 3rd three-position four-way valve junction is provided with second pressure sensor.
Pass through above-mentioned technical proposal, when precompression cylinder pushes, after certain pressure, the control of first pressure sensor is unidirectional
Sequence valve is opened, and prevents from overloading, and when main cylinder pressure pushes, after certain pressure, second pressure sensor controls unidirectional sequence
Valve is opened, and prevents from overloading.
A kind of method of work of baling press, comprises the following steps：
Step 1, precompression cylinder decline, and product are carried out previously extruded；
Step 2, precompression cylinder rise, and leave product；
Step 3, casing cylinder promote, and casing cylinder has two kinds of speed governing states of F.F. and slow-motion, product is pushed into accurate location；
Step 4, casing cylinder are stepped back, and casing cylinder has rewind and moves back two kinds of speed governing states slowly, leaves product；
Step 5, main cylinder pressure off-load simultaneously rise, prepare to extrude product；
Step 6, main cylinder pressure decline and pressurizeed, and compress product and pack；
Step 7, main cylinder pressure rise, and product are taken out, into next circulation.
Compared with prior art, beneficial effects of the present invention are as follows：
（1）The independently moving of first oil pump control precompression cylinder, the action of precompression cylinder can selectively unlock, the same time control of the second oil pump
The motion of casing cylinder processed and main cylinder pressure, previously extruded action can ensure follow-up main pressure packing more in place and stably, to production
Product carry out preparing extruding, ensure the continuity of the whole work of baling press, improve operating efficiency；
（2）Cooperated between first inserting valve group and the 5th inserting valve group and the first three-position four-way valve, can protect and control
Unobstructed, the second inserting valve group, the 3rd inserting valve group and the 4th inserting valve group and the second three-position four-way valve and the of precompression cylinder oil circuit
Cooperated between three three-position four-way valves, while control and protect the oil circuit of casing cylinder and main cylinder pressure, ensure baling press work
Security；
（3）Whole baling press can carry out the operation of plurality of step, farthest ensure to pack by using minimum control valve
The integrality and continuity of process, realize it is quick to product, stably, accurately packing.
Brief description of the drawings
Fig. 1 is a kind of hydraulic schematic of baling press；
Fig. 2 is a kind of partial schematic diagram one of the hydraulic system of baling press；
Fig. 3 is a kind of partial schematic diagram two of the hydraulic system of baling press；
Fig. 4 is electrical action function table.
Reference：1st, hydraulic power source；2nd, the first oil pump；3rd, the second oil pump；4th, precompression cylinder；5th, casing cylinder；6th, main cylinder pressure；7、
First pressure sensor；8th, second pressure sensor；11st, the first inserting valve group；12nd, the second inserting valve group；13rd, the 3rd inserted valve
Group；14th, the 4th inserting valve group；15th, the 5th inserting valve group；16th, casing valve group；17th, release valve group；21st, the first three-position four-way valve；
22nd, the second three-position four-way valve；23rd, the 3rd three-position four-way valve；24th, one way sequence valve；25th, check valve；100th, check valve；101st, it is interior
Control check valve；102nd, the first control oil circuit；103rd, the first two-position four-way valve；104th, sequence valve；105th, the first oil outlet end；106th,
Two oil outlet ends；107th, oil inlet end；160th, check valve；161st, the second control oil circuit；162nd, two position three-way valve；170th, the two or two four
Port valve；171st, one-way throttle valve；200th, hydraulic pump；201st, outlet line.
Embodiment
In order that the purpose of the present invention, technical scheme and beneficial effect are clearer, with reference to embodiment and accompanying drawing pair
The present invention is described in further detail, but embodiments of the present invention are not limited only to this.
Solid line is working line in figure, and dotted line is control piper, and perforated line is module group.
A kind of hydraulic system of baling press, as shown in figure 1, including hydraulic power source 1, hydraulic power source 1 is connected with the first oil pump 2 and
Two oil pumps 3；First oil pump 2 includes two hydraulic pumps 200 in parallel, and the oil-out of the first oil pump 2 is connected with two outlet line 201
And the first inserting valve group 11 and the 5th inserting valve group 15 are respectively led to, the second oil pump 3 includes three hydraulic pumps 200 in parallel, the
The oil-out of two oil pump 3 is connected with three outlet line 201 and respectively leads to the second inserting valve group 12, the 3rd inserting valve group 13 and the
Four inserting valve groups 14.
As shown in Figures 2 and 3, the first inserting valve group 11, second inserts valve group the 12, the 3rd and inserts the inserting of valve group the 13, the 4th
Valve group 14 and the 5th, which inserts valve group 15, includes check valve 100 and internal control check valve 101, check valve 100 and internal control check valve 101
There is common oil inlet end 107, the other end of check valve 100 is communicated with the first oil outlet end 105, the connection of the other end of internal control check valve 101
There is the second oil outlet end 106.The first control oil circuit 102 is connected with internal control check valve 101, is provided with the first control oil circuit 102
First two-position four-way valve 103 and sequence valve 104.Inserting valve group can be controlled to the flow direction of the hydraulic oil of therein, when
Internal one-way valve 100 is connected, and when the first two-position four-way valve 103 starts, internal control check valve 101 is disconnected, only the first oil outlet end
105 open；When internal one-way valve 100 is connected, and the first two-position four-way valve 103 does not start, internal control check valve 101 is connected, and first
The oil outlet end 106 of oil outlet end 105 and second is opened；When internal one-way valve 100 is disconnected, internal control check valve 101 is connected, only
Second oil outlet end 106 is opened.
As shown in Fig. 2 the first inserting valve group 11 and the 5th insert the first oil outlet end 105 of valve group 15 simultaneously with the one or three
The P mouths connection of four-way valve 21, the B mouths of the first three-position four-way valve 21 are connected with the rodless cavity of precompression cylinder 4 by one way sequence valve 24,
The A mouths of first three-position four-way valve 21 are connected with the rod chamber of precompression cylinder 4.The of first inserting valve group 11 and the 5th inserting valve group 15
The oil return of two oil outlet end 106 enters hydraulic power source 1.One way sequence valve 24 is check valve 25 and sequence valve 104 in parallel.One or three four
The T mouths connection of port valve 21 enters hydraulic power source 1.The A mouths junction of the three-position four-way valve 21 of precompression cylinder 4 and first is provided with first pressure
Sensor 7.During precompression cylinder 4 pushes, after more than specified pressure, first pressure sensor 7 controls unidirectional sequence
Valve 24 is opened, and prevents from overloading, and protects precompression cylinder 4.
As shown in figure 3, the second inserting valve group the 12, the 3rd inserts the first oil outlet end that valve group 13 and the 4th inserts valve group 14
105 are connected with the one end of casing valve group 16 simultaneously, and the second inserting 12 direct oil return of valve group enters hydraulic power source 1, the 3rd inserting valve group 13
The oil return of the second oil outlet end 106 with the 4th inserting valve group 14 enters hydraulic power source 1.Casing valve group 16 includes check valve 160, check valve
The second control oil circuit 161 is communicated with 160, two position three-way valve 162 is installed on the second control oil circuit 161.Casing valve group 16 can
To control the keying of bin movement oil circuit, while group plays a part of protecting oil circuit.The other end of casing valve group 16 and the two or three
The P mouths connection of four-way valve 22, the A mouths of the second three-position four-way valve 22 are connected with the rodless cavity of casing cylinder 5, the second three-position four-way valve 22
B mouths be connected with the rod chamber of casing cylinder 5, the T mouths of the second three-position four-way valve 22 and the 3rd inserting inserted valve of valve group 13 and the 4th
Second oil outlet end 106 of group 14 connects, while is connected with the second control oil circuit 161.
First oil outlet end 105 of the second inserting valve group 12, the 3rd inserting valve group 13 and the 4th inserting valve group 14 is simultaneously with the
The A mouths connection of three three-position four-way valves 23, the B mouths of the 3rd three-position four-way valve 23 are connected with main cylinder pressure 6 by one way sequence valve 24
Rodless cavity, the A mouths of the 3rd three-position four-way valve 23 are connected with the rod chamber of main cylinder pressure 6.One way sequence valve 24 is check valve in parallel
25 and sequence valve 104.The T mouths connection of 3rd three-position four-way valve 23 enters hydraulic power source 1.The main three-position four-way valve 23 of cylinder pressure 6 and the 3rd
The junctions of A mouths second pressure sensor 8 is installed.During main cylinder pressure 6 pushes, after more than specified pressure,
Second pressure sensor 8 controls one way sequence valve 24 to open, and prevents from overloading, protects main cylinder pressure 6.
3rd inserting valve group 13 and the 4th inserts to be connected between the second oil outlet end 106 of valve group 14 and the bottom of main cylinder pressure 6
Release valve group 17.Release valve group 17 includes the second two-position four-way valve 170 and one-way throttle valve 171, the second two-position four-way valve 170
P mouths are connected with the A mouths of the 3rd three-position four-way valve 23, pass through one-way throttle valve 171 and at the A mouths of the second two-position four-way valve 170
Three inserting valve groups 13 connect with the second oil outlet end 106 of the 4th inserting valve group 14.One-way throttle valve 171 includes choke valve in parallel
With check valve 25.After release valve group 17 starts, release can be carried out in the main uphill process of cylinder pressure 6, protects the safety of oil circuit.
As shown in Figures 2 and 3, the flow of oil inlet end 107 of the first inserting valve group 11 is 225L/min, and the 5th inserts valve group 15
The flow of oil inlet end 107 be 105L/min, the flow of oil inlet end 107 of the second inserting valve group 12 is 225L/min, the 3rd inserted valve
The flow of oil inlet end 107 of group 13 is 194L/min, and the flow of oil inlet end 107 of the 4th inserting valve group 14 is 105L/min.5th inserts
Fill and be connected with check valve 25 between the oil pump 2 of oil inlet end 107 and first of valve group 15, the oil inlet end 107 of the 4th inserting valve group 14 with
Check valve 25 is provided between second oil pump 3.Because the oil pressure of oil inlet end 107 of the first inserting valve group 11 is more than the 5th inserting valve group
15 oil pressure of oil inlet end 107, the second inserting valve group the 12, the 3rd insert the oil pressure of 13 oil inlet end of valve group 107 and are more than the 4th inserting valve group
14 oil pressure of oil inlet end 107, check valve 25 prevent the outlet line 201 of low oil pressure from oil return occurs, protect oil circuit.
It is yv120 that the right-hand member of first three-position four-way valve 21, which obtains electric signal, and it is yv121 that left end, which obtains electric signal,；Second 3-position 4-way
It is yv131 that the right-hand member of valve 22, which obtains electric signal, and it is yv130 that left end, which obtains electric signal,；The right-hand member of 3rd three-position four-way valve 23 obtains electric signal and is
Yv150, it is yv151 that left end, which obtains electric signal,；First inserting valve group 11 in the first two-position four-way valve 103 electric signal be
yv122；The electric signal that obtains of the first two-position four-way valve 103 in 5th inserting valve group 15 is yv123；In second inserting valve group 12
The electric signal that obtains of first two-position four-way valve 103 is yv152；3rd inserting valve group 13 in the first two-position four-way valve 103 it is electric
Signal is yv153；The electric signal that obtains of the first two-position four-way valve 103 in 4th inserting valve group 14 is yv154；Casing valve group 16
The electric signal that obtains of interior two position three-way valve 162 is yv132；The second two-position four-way valve 170 in release valve group 17 electric signal
For yv155.As shown in figure 4, precompression cylinder 4 can be with raising and lowering, casing cylinder 5 can move back with F.F., slow-motion, rewind and slowly, main pressure
Cylinder 6 can be risen with off-load, pushed and be pressurizeed.Cooperate work between multiple cylinder bodies on baling press, forms complete packing
Step.
A kind of method of work of baling press, comprises the following steps：
Step 1, precompression cylinder 4 decline, and product are carried out previously extruded；
Step 2, precompression cylinder 4 rise, and leave product；
Step 3, casing cylinder 5 promote, and casing cylinder 5 has two kinds of speed governing states of F.F. and slow-motion, and product is pushed into accurate location；
Step 4, casing cylinder 5 are stepped back, and casing cylinder 5 has rewind and moves back two kinds of speed governing states slowly, leaves product；
Step 5, the main off-load of cylinder pressure 6 simultaneously rise, prepare to extrude product；
Step 6, main cylinder pressure 6 decline and pressurizeed, and compress product and pack；
Step 7, main cylinder pressure 6 rise, and product are taken out, into next circulation.
The working principle and beneficial effect of the present invention is as follows：
The operation principle of hydraulic system is as shown in Figure 4.Baling press is divided into two independent drive parts, and the first oil pump 2 controls pre-
The independently moving of cylinder pressure 4, the action of precompression cylinder 4 can selectively unlock, previously extruded product when can prevent main pressure it is at random and
Fluffy, previously extruded action can ensure that follow-up main pressure packing more in place and stably, improves follow-up packing efficiency；Second
Oil pump 3 controls the motion of casing cylinder 5 and main cylinder pressure 6 simultaneously, and product promote and mainly extruded, ensures baling press whole process work
The continuity of work, improve the stability after product packing.
First inserting valve group 11 and the 5th cooperates between inserting the three-position four-way valve 21 of valve group 15 and first, can protect
With unobstructed, the second inserting inserting inserting valve group 14 and the 2nd 3 of valve group 13 and the 4th of valve group the 12, the 3rd of the control oil circuit of precompression cylinder 4
Cooperated between the three-position four-way valve 23 of position four-way valve 22 and the 3rd, while control and protect the oil of casing cylinder 5 and main cylinder pressure 6
Road, ensure the security of baling press work.Whole baling press can carry out the operation of plurality of step, by using minimum control valve
Farthest ensure packing process integrality and continuity, realize it is quick to product, stably, accurately packing, improve
Stability, security and the operating efficiency of baling press.
Described above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of hydraulic system of baling press, it is characterised in that including hydraulic power source (1), the hydraulic power source (1) is connected with the first oil
Pump (2) and the second oil pump (3)；
First oil pump (2) is connected with the first inserting valve group (11), the first inserting valve group (11) and the first 3-position 4-way
Valve (21) connects, and first three-position four-way valve (21) is connected with precompression cylinder (4) by one way sequence valve (24)；
Second oil pump (3) at the same be connected with the second inserting valve group (12), the 3rd inserting valve group (13) and the 4th insert valve group
(14), the second inserting valve group (12), the 3rd inserting valve group (13) and the 4th inserting valve group (14) while and case
Body valve group (16) connects, and the casing valve group (16) connects with the second three-position four-way valve (22), second three-position four-way valve
(22) it is connected with casing cylinder (5)；
The second inserting valve group (12), the 3rd inserting valve group (13) and the described 4th insert valve group (14) while again with the
Three three-position four-way valves (23) connect, and the 3rd three-position four-way valve (23) is connected with main cylinder pressure by one way sequence valve (24)
(6), it is connected with pressure-relief valve between the 3rd inserting valve group (13) and the 4th inserting valve group (14) and the main cylinder pressure (6)
Group (17).
2. the hydraulic system of baling press according to claim 1, it is characterised in that first oil pump (2) and the one or three
The fiveth inserting valve group (15) in parallel with the described first inserting valve group (11) is connected between position four-way valve (21).
3. the hydraulic system of baling press according to claim 2, it is characterised in that the first inserting valve group (11), institute
State the second inserting valve group (12), the 3rd inserting valve group (13), the 4th inserting valve group (14) and the 5th inserted valve
Group (15) includes check valve (100) and internal control check valve (101), the check valve (100) and the internal control check valve
(101) oil inlet end (107) is identical, and the check valve (100) is communicated with the first oil outlet end (105), the internal control check valve
(101) it is communicated with the second oil outlet end (106)；
The first control oil circuit (102) is provided with the internal control check valve (101), is set on the first control oil circuit (102)
There are the first two-position four-way valve (103) and sequence valve (104).
4. the hydraulic system of baling press according to claim 3, it is characterised in that the casing valve group (16) includes unidirectional
Valve (160), the check valve (160) is interior to be provided with the second control oil circuit (161), is set on the second control oil circuit (161)
There is two position three-way valve (162).
5. the hydraulic system of baling press according to claim 4, it is characterised in that the release valve group (17) includes second
Two-position four-way valve (170) and one-way throttle valve (171).
6. the hydraulic system of baling press according to claim 5, it is characterised in that the of the first inserting valve group (11)
One oil outlet end (105) and it is described 5th inserting valve group (15) the first oil outlet end (105) and meanwhile with first three-position four-way valve
(21) connect, described first, which inserts the second oil outlet end (106) of valve group (11) and the second of the 5th inserting valve group (15), goes out
Oily end (106) while oil return enters hydraulic power source (1).
7. the hydraulic system of baling press according to claim 6, it is characterised in that the of the second inserting valve group (12)
One oil outlet end (105), the first oil outlet end (105) and the described 4th of the 3rd inserting valve group (13) insert the of valve group (14)
One oil outlet end (105) while connected with the casing valve group (16) and the 3rd three-position four-way valve (23), the 3rd inserting valve group
(13) the second oil outlet end (106) and the second oil outlet end (106) of the 4th inserting valve group (14) while with the described 2nd 2
Oil return enters hydraulic power source (1) after position four-way valve (170) connection.
8. the hydraulic system of baling press according to claim 1, it is characterised in that first oil pump (2) includes parallel connection
Two hydraulic pumps (200), first oil pump (2) is provided with two outlet line (201), and second oil pump (3) includes
Three hydraulic pumps (200) in parallel, second oil pump (3) are provided with three outlet line (201)；
Check valve (25), the 4th inserting valve group are provided between the 5th inserting valve group (15) and the first oil pump (2)
(14) check valve (25) is provided between the second oil pump (3).
9. the hydraulic system of baling press according to claim 1, it is characterised in that the precompression cylinder (4) and described first
Three-position four-way valve (21) junction is provided with first pressure sensor (7), the main cylinder pressure (6) and the 3rd three-position four-way valve
(23) junction is provided with second pressure sensor (8).
10. a kind of method of work of baling press, it is characterised in that comprise the following steps：
Step 1, precompression cylinder (4) decline, and product are carried out previously extruded；
Step 2, precompression cylinder (4) rise, and leave product；
Step 3, casing cylinder (5) promote, and casing cylinder (5) has two kinds of speed governing states of F.F. and slow-motion, product is pushed into accurate position
Put；
Step 4, casing cylinder (5) are stepped back, and casing cylinder (5) has rewind and moves back two kinds of speed governing states slowly, leaves product；
Step 5, main cylinder pressure (6) off-load simultaneously rise, prepare to extrude product；
Step 6, main cylinder pressure (6) decline and pressurizeed, and compress product and pack；
Step 7, main cylinder pressure (6) rise, and product are taken out, into next circulation.
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