CN107013526A - Filter press hydraulic control circuit - Google Patents
Filter press hydraulic control circuit Download PDFInfo
- Publication number
- CN107013526A CN107013526A CN201710365593.5A CN201710365593A CN107013526A CN 107013526 A CN107013526 A CN 107013526A CN 201710365593 A CN201710365593 A CN 201710365593A CN 107013526 A CN107013526 A CN 107013526A
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- CN
- China
- Prior art keywords
- hydraulic
- valve
- oil
- plywood
- electro
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/12—Filter presses, i.e. of the plate or plate and frame type
- B01D25/164—Chamber-plate presses, i.e. the sides of the filtering elements being clamped between two successive filtering plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/027—Check valves
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20507—Type of prime mover
- F15B2211/20515—Electric motor
Abstract
The invention discloses filter press hydraulic control circuit, it includes oil supply structure, the double pressure two-flow hydraulic pumps connected with oil supply structure, electro-hydraulic reversing valve between double pressure two-flow hydraulic pumps and plywood oil cylinder, check valve between double pressure two-flow hydraulic pumps and electro-hydraulic reversing valve, hydraulic control one-way valve between the rodless cavity of electro-hydraulic reversing valve and plywood oil cylinder, regeneration check valve between the rod chamber and electro-hydraulic reversing valve of plywood oil cylinder, connect the balanced valve between the rod chamber and electro-hydraulic reversing valve of plywood oil cylinder, and the drainback passage connected with electro-hydraulic reversing valve；By setting the electro-hydraulic reversing valve, the regeneration check valve, the balanced valve and the hydraulic control one-way valve, so that hydraulic oil is reused during the plywood of the filter press, it substantially increases the plywood efficiency of plywood oil cylinder on the basis of the output discharge capacity of oil supply structure is not improved.
Description
Technical field
The present invention relates to filter press field, specifically, it is related to a kind of filter press hydraulic control circuit.
Background technology
Filter press is a kind of conventional solid-liquid separating equipment, and Chemical Manufacture is just applied in 18 beginnings of the century, still extensive so far
Applied to chemical industry, pharmacy, metallurgy, dyestuff, food, brewage, ceramics and the industry such as environmental protection；In other words using a kind of special
Filter medium, applies certain pressure to object so that a kind of plant equipment that liquid dialysis comes out；Filter press makes in mixed liquor
Solids extract come out, realize the effect of solid and liquid separation.
The structure of filter press is made up of three parts, Part I：Frame, frame is the basic components of filter press, and two ends are
Thrust plate and hold-down head, the crossbeam of both sides connect the two, and crossbeam is to support filter plate, filter frame and pressure strip；Second
Point：Hold-down mechanism；Part III：Filter mechanism, filter mechanism is made up of filter plate, filter frame, filter cloth, squeeze diaphragm, and material passes through
Feeding structure enters each filter chamber, and solid particle is more than filter medium because of its particle diameter（Filter cloth）Aperture be trapped within filter chamber, filter
Liquid is then from the fluid hole outflow below filter plate.
Wherein, the speed of filter press plywood cylinder action directly affects the cycle time of filter press, in order to improve filter press
Production efficiency, traditional filter press hydraulic control circuit have to improve hydraulic pump discharge capacity, even with invariable power hydraulic pressure
Pump, very big electric energy can be consumed while increase pumpage.
Therefore, now providing a kind of voltage-controlled system that can need not be improved hydraulic pump discharge and filter press plywood speed can be improved
Loop.
The content of the invention
Therefore, the present invention provides a kind of service life length and the low filter press hydraulic control circuit of use cost.
In order to solve the above technical problems, the invention provides a kind of filter press hydraulic control circuit, it includes oil supply structure,
The double pressure two-flow hydraulic pumps connected with the oil supply structure, between double the pressure two-flow hydraulic pumps and plywood oil cylinder
Electro-hydraulic reversing valve, the check valve between double pressure two-flow hydraulic pumps and the electro-hydraulic reversing valve, located at described electro-hydraulic
Hydraulic control one-way valve between the rodless cavity of reversal valve and plywood oil cylinder, the rod chamber located at the plywood oil cylinder electro-hydraulic is changed with described
To the regeneration check valve between valve, the balanced valve between the rod chamber and the electro-hydraulic reversing valve of the plywood oil cylinder is connected,
And the drainback passage connected with the electro-hydraulic reversing valve；
Wherein, when filter press closes filter plate, the oil supply structure work makes hydraulic oil enter double pressure two-flow hydraulic pumps,
The outlet oil pressure of double pressure two-flow hydraulic pumps is low, and the stroking mechanism in double pressure two-flow hydraulic pumps is double by double pressures
The discharge capacity of flow hydraulic pump is set to maximum, hydraulic oil through the check valve by the P mouths of the electro-hydraulic reversing valve enter B mouthfuls go out after
In the rodless cavity that the plywood oil cylinder is carried out after the hydraulic control one-way valve, and promote the plywood oil cylinder by the rodless cavity not
Break to the rod chamber slide, make the hydraulic oil that the plywood oil cylinder is quickly stretched out in piston rod, the rod chamber by it is described again
Enter the B mouthfuls of piston rods for continuing to press on the plywood oil cylinder by the P mouths of the electro-hydraulic reversing valve again after raw check valve to stretch out；
After the filter plate of filter press is closed completely, the outlet oil pressure of double pressure two-flow hydraulic pumps raises to above double pressures
The low pressure setting value of two-flow hydraulic pump, the stroking mechanism of double pressure two-flow hydraulic pumps presses two-flow liquid by described pair
The discharge capacity of press pump is set to minimum value, hydraulic oil through the check valve by the P mouths of the electro-hydraulic reversing valve enter B mouthfuls go out after through described
In the rodless cavity that the plywood oil cylinder is carried out after hydraulic control one-way valve, the hydraulic pressure at the B mouths of the electro-hydraulic reversing valve conduct to
Hydraulic oil in the balanced valve inside and opening balanced valve, the rodless cavity of the plywood oil cylinder is after the balanced valve by described
The A mouths of voltage commutation valve enter T mouthfuls go out after enter drainback passage.
Also include the electromagnetism unloading overflow valve that one end is connected with the check valve, the other end is connected with the drainback passage,
When filter press needs plywood, the electromagnetism unloading overflow valve is off, and hydraulic oil enters institute after the check valve
State electro-hydraulic reversing valve；When filter press is without plywood, the electromagnetism unloading overflow valve is in closure state, and hydraulic oil is by the list
Directly enter the drainback passage through the electromagnetism unloading overflow valve after to valve.
Also include the safe relief circuit between the rodless cavity and the drainback passage of the plywood oil cylinder.
Safe relief circuit includes the safety overflow valve being arranged between the hydraulic control one-way valve and the drainback passage, with
And the one-way throttle valve and Solenoid ball valve in parallel with the safety overflow valve.
It is double that the hydraulic oil that the oil supply structure is included in hydraulic oil container and the driving hydraulic oil container enters double pressures
The Oil pump electrical machinery of flow hydraulic pump.
The fuel-displaced place of the hydraulic oil container is additionally provided with oil absorption filter.
The tail end of the drainback passage is connected with the hydraulic oil container, and return filter is additionally provided with the drainback passage.
The above-mentioned technical proposal of the present invention has advantages below compared with prior art：
In the present invention, by setting the electro-hydraulic reversing valve, the regeneration check valve, the balanced valve and the fluid-control one-way
Valve so that hydraulic oil is reused during the plywood of the filter press, it is arranged in the output for not improving oil supply structure
On the basis of amount, the plywood efficiency of plywood oil cylinder is substantially increased.
Brief description of the drawings
In order that present disclosure is more likely to be clearly understood, specific embodiment and combination below according to the present invention
Accompanying drawing, the present invention is further detailed explanation, and wherein Fig. 1 is filter press hydraulic control circuit signal of the present invention
Figure；
Description of reference numerals：1- hydraulic oil containers；2- oil absorption filters；3- Oil pump electrical machineries；The double pressure two-flow hydraulic pumps of 4-；5- is unidirectional
Valve；6- electromagnetism unloading overflow valves；7- regenerates check valve；8- electro-hydraulic reversing valves；9- balanced valves；10- hydraulic control one-way valves；11- plywood
Oil cylinder；12- one-way throttle valves；13- Solenoid ball valves；14- safety overflow valves；15- return filters；16- piston rods；17- is without bar
Chamber；18- rod chambers.
Embodiment
The embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.
As shown in figure 1, the filter press hydraulic control circuit of the present embodiment, it includes oil supply structure, with the oil supply structure
Double pressure two-flow hydraulic pumps 4 of connection, the electro-hydraulic reversing valve between double the pressure two-flow hydraulic pumps 4 and plywood oil cylinder 11
8, the check valve 5 between double the pressure two-flow hydraulic pumps 4 and the electro-hydraulic reversing valve 8, located at the electro-hydraulic reversing valve 8
Hydraulic control one-way valve 10 between the rodless cavity 17 of plywood oil cylinder 11, located at rod chamber 18 and the electricity of the plywood oil cylinder 11
Regeneration check valve 7 between liquid reversal valve 8, connect the plywood oil cylinder 11 rod chamber 18 and the electro-hydraulic reversing valve 8 it
Between balanced valve 9, and the drainback passage connected with the electro-hydraulic reversing valve；
Wherein, when filter press closes filter plate, the oil supply structure work makes hydraulic oil enter double pressure two-flow hydraulic pumps
4, the outlet oil pressure of double pressure two-flow hydraulic pumps 4 is low, and the stroking mechanism in double pressure two-flow hydraulic pumps 4 will be described double
The discharge capacity of pressure two-flow hydraulic pump 4 is set to maximum, and hydraulic oil is entered through the check valve 5 by the P mouths of the electro-hydraulic reversing valve 8
B mouthfuls go out after carried out after the hydraulic control one-way valve 10 in the rodless cavity 17 of the plywood oil cylinder 11, and promote the plywood oil cylinder
11 are constantly slided from the rodless cavity 17 to the rod chamber 18, the plywood oil cylinder 11 is quickly stretched out piston rod 16, described
Hydraulic oil in rod chamber 18 enters B mouthfuls by the P mouths of the electro-hydraulic reversing valve 8 again after the regeneration check valve 7 and continued to press on
The piston rod 16 of the plywood oil cylinder 11 stretches out；After the filter plate of filter press is closed completely, double pressure two-flows
The outlet oil pressure of hydraulic pump 4 raises to above the low pressure setting value of double pressure two-flow hydraulic pumps 4, double pressure double fluids
The stroking mechanism for measuring hydraulic pump 4 sets the discharge capacity of double pressure two-flow hydraulic pumps 4 to minimum value, and hydraulic oil is through described unidirectional
Valve 5 by the P mouths of the electro-hydraulic reversing valve 8 enter B mouthfuls go out after the nothing of the plywood oil cylinder 11 is carried out after the hydraulic control one-way valve 10
In rod cavity 17, the hydraulic pressure at the B mouths of the electro-hydraulic reversing valve 8 conducts to the inside of balanced valve 9 and opens balanced valve 9,
Hydraulic oil in the rodless cavity 17 of the plywood oil cylinder 11 enters T mouthfuls after the balanced valve 9 by the A mouths of the electro-hydraulic reversing valve 8
Enter drainback passage after going out.
The present embodiment is by setting the electro-hydraulic reversing valve 8, the regeneration check valve 7, the balanced valve 9 and the hydraulic control
Check valve 10 so that hydraulic oil is reused during the plywood of the filter press, it is not improving oil supply structure
Export on the basis of discharge capacity, substantially increase the plywood efficiency of plywood oil cylinder 11；
Further, the present embodiment also connected including one end with the check valve 5, the electromagnetism that the other end is connected with the drainback passage
Unloading overflow valve 6, when filter press needs plywood, the electromagnetism unloading overflow valve 6 is off, and hydraulic oil is through the list
Enter the electro-hydraulic reversing valve 8 after to valve 5；When filter press is without plywood, the electromagnetism unloading overflow valve 6 is in closed form
State, hydraulic oil directly will enter the drainback passage after the check valve 5 through the electromagnetism unloading overflow valve 6.
On the basis of above-described embodiment, the present embodiment also include located at the plywood oil cylinder 11 rodless cavity 17 with it is described
Safe relief circuit between drainback passage.Specifically, safe relief circuit includes being arranged on the hydraulic control one-way valve 10 and institute
State the safety overflow valve 14 between drainback passage, and the one-way throttle valve 12 in parallel with the safety overflow valve 14 and electromagnetic ball
Valve 13.
In the present embodiment, on the one hand, in the pressure maintaining period of plywood oil cylinder 11, due to feeding or extruding the originals such as counter-force
Oil liquid pressure in cause, the plywood oil cylinder 11 may be raised, when the safe pressure for being increased to the setting of safety overflow valve 14
When, the safety overflow valve 14 is quickly opened, and discharges partial pressure, maintains the peace of the oil liquid pressure in the plywood oil cylinder 11
Entirely；On the other hand, before the piston rod 16 of the plywood oil cylinder 11 is retracted, the Solenoid ball valve 13 is first turned on, makes conjunction
Hydraulic oil in the rodless cavity 17 of leaf fat cylinder 11 is logical to oil return after one-way throttle valve 12, then through the oil return of Solenoid ball valve 13
Road, so that the oil liquid pressure in the rodless cavity 17 of the plywood oil cylinder 11 is discharged, and also it need not run the Oil pump electrical machinery 3,
Save electric energy；Meanwhile, the plywood oil cylinder 11 is performed again after discharging the pressure in the rodless cavity 17 of the plywood oil cylinder 11
The piston rod 16 retract action, greatly eliminate vibrations and impact；Therefore, the safe relief circuit not only ensure that
The rodless cavity 17 of the plywood oil cylinder 11 eliminates the fluid off-load of rodless cavity 17 no more than setting safe pressure
The vibrations and impact for being.
On the basis of the above, the oil supply structure includes the hydraulic oil in hydraulic oil container 1 and the driving hydraulic oil container 1
Into the Oil pump electrical machinery 3 of double pressure two-flow hydraulic pumps 4；Further, the fuel-displaced place of the hydraulic oil container 1 is additionally provided with oil suction
Filter 2, the fluid that 2 pairs of the oil absorption filter will enter double pressure two-flow hydraulic pumps 4 is filtered.
As the preferred embodiment of the present embodiment, the tail end of the drainback passage is connected with the hydraulic oil container 1, described
Return filter 15 is additionally provided with drainback passage, 15 pairs of the return filter will be back to the oil return beaten up in hydraulic oil container 1 and enter
Row filtering, it is ensured that oil return quality.
Obviously, above-described embodiment is only intended to clearly illustrate example, and the not restriction to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or
Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or
Among changing still in the protection domain of the invention.
Claims (7)
1. filter press hydraulic control circuit, it is characterised in that：It includes oil supply structure, and the double pressures connected with the oil supply structure are double
Flow hydraulic pump（4）, located at double pressure two-flow hydraulic pumps（4）With plywood oil cylinder（11）Between electro-hydraulic reversing valve（8）If,
In double pressure two-flow hydraulic pumps（4）With the electro-hydraulic reversing valve（8）Between check valve（5）, located at the electro-hydraulic commutation
Valve（8）With plywood oil cylinder（11）Rodless cavity（17）Between hydraulic control one-way valve（10）, located at the plywood oil cylinder（11）Have
Rod cavity（18）With the electro-hydraulic reversing valve（8）Between regeneration check valve（7）, connect in the plywood oil cylinder（11）Rod chamber
（18）With the electro-hydraulic reversing valve（8）Between balanced valve（9）, and with the electro-hydraulic reversing valve（8）The drainback passage of connection；
Wherein, when filter press closes filter plate, the oil supply structure work makes hydraulic oil enter double pressure two-flow hydraulic pumps
（4）, double pressure two-flow hydraulic pumps（4）Outlet oil pressure it is low, double pressure two-flow hydraulic pumps（4）Interior stroking mechanism will
Double pressure two-flow hydraulic pumps（4）Discharge capacity set to maximum, hydraulic oil is through the check valve（5）By the electro-hydraulic commutation
Valve（8）P mouths enter B mouthfuls go out after through the hydraulic control one-way valve（10）After carry out the plywood oil cylinder（11）Rodless cavity（17）It is interior,
And promote the plywood oil cylinder（11）By the rodless cavity（17）Constantly to the rod chamber（18）Slide, make the plywood oil cylinder
（11）It is quick to stretch out piston rod（16）, the rod chamber（18）Interior hydraulic oil is by the regeneration check valve（7）Afterwards again by institute
State electro-hydraulic reversing valve（8）P mouths enter B mouthfuls and continue to press on the plywood oil cylinder（11）The piston rod（16）Stretch out；Work as press filtration
After the filter plate of machine closure completely, double pressure two-flow hydraulic pumps（4）Outlet oil pressure to raise to above double pressure double
Flow hydraulic pump（4）Low pressure setting value, double pressure two-flow hydraulic pumps（4）Stroking mechanism by double pressure double fluids
Measure hydraulic pump（4）Discharge capacity set to minimum value, hydraulic oil is through the check valve（5）By the electro-hydraulic reversing valve（8）P mouths enter
B mouthfuls go out after through the hydraulic control one-way valve（10）After carry out the plywood oil cylinder（11）Rodless cavity（17）It is interior, the electro-hydraulic commutation
Valve（8）B mouths at hydraulic pressure conduct to the balanced valve（9）Internal and opening balanced valve（9）, the plywood oil cylinder（11）
Rodless cavity（17）Interior hydraulic oil is through the balanced valve（9）Afterwards by the electro-hydraulic reversing valve（8）A mouths enter T mouthfuls go out after enter
Drainback passage.
2. filter press hydraulic control circuit according to claim 1, it is characterised in that：Also include one end and the check valve
（5）The electromagnetism unloading overflow valve that connection, the other end are connected with the drainback passage（6）, when filter press needs plywood, the electricity
Magnetic unloading overflow valve（6）It is off, hydraulic oil is through the check valve（5）Enter the electro-hydraulic reversing valve afterwards（8）；Work as pressure
When filter is without plywood, the electromagnetism unloading overflow valve（6）In closure state, hydraulic oil is by the check valve（5）It is direct afterwards
Through the electromagnetism unloading overflow valve（6）Into the drainback passage.
3. filter press hydraulic control circuit according to claim 2, it is characterised in that：Also include being located at the plywood oil cylinder
（11）Rodless cavity（17）Safe relief circuit between the drainback passage.
4. filter press hydraulic control circuit according to claim 3, it is characterised in that：Safe relief circuit includes being arranged on
The hydraulic control one-way valve（10）Safety overflow valve between the drainback passage（14）, and with the safety overflow valve（14）
One-way throttle valve in parallel（12）And Solenoid ball valve（13）.
5. filter press hydraulic control circuit according to claim 4, it is characterised in that：The oil supply structure includes hydraulic oil
Case（1）And drive the hydraulic oil container（1）Interior hydraulic oil enters double pressure two-flow hydraulic pumps（4）Oil pump electrical machinery
（3）.
6. filter press hydraulic control circuit according to claim 5, it is characterised in that：The hydraulic oil container（1）It is fuel-displaced
Place is additionally provided with oil absorption filter（2）.
7. filter press hydraulic control circuit according to claim 5, it is characterised in that：The tail end of the drainback passage and institute
State hydraulic oil container（1）Return filter is additionally provided with connection, the drainback passage（15）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710365593.5A CN107013526B (en) | 2017-05-22 | 2017-05-22 | Filter press hydraulic control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710365593.5A CN107013526B (en) | 2017-05-22 | 2017-05-22 | Filter press hydraulic control circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107013526A true CN107013526A (en) | 2017-08-04 |
| CN107013526B CN107013526B (en) | 2019-09-17 |
Family
ID=59450288
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710365593.5A Active CN107013526B (en) | 2017-05-22 | 2017-05-22 | Filter press hydraulic control circuit |
Country Status (1)
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| CN (1) | CN107013526B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108488132A (en) * | 2018-05-18 | 2018-09-04 | 宁波真格液压科技有限公司 | A kind of twin-tub autocontrol valve |
| CN108916139A (en) * | 2018-06-15 | 2018-11-30 | 沪东中华造船(集团)有限公司 | A kind of fluid pressure type moulding bed support system and its application method |
| CN112121481A (en) * | 2020-09-30 | 2020-12-25 | 株洲时代新材料科技股份有限公司 | Full-automatic protection method and system for open-close plates of filter press |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108488132A (en) * | 2018-05-18 | 2018-09-04 | 宁波真格液压科技有限公司 | A kind of twin-tub autocontrol valve |
| CN108916139A (en) * | 2018-06-15 | 2018-11-30 | 沪东中华造船(集团)有限公司 | A kind of fluid pressure type moulding bed support system and its application method |
| CN112121481A (en) * | 2020-09-30 | 2020-12-25 | 株洲时代新材料科技股份有限公司 | Full-automatic protection method and system for open-close plates of filter press |
| CN112121481B (en) * | 2020-09-30 | 2022-03-29 | 株洲时代新材料科技股份有限公司 | Full-automatic protection method and system for open-close plates of filter press |
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