CN108827789A - A kind of hydraulic press rapid water filling system and its control method - Google Patents
A kind of hydraulic press rapid water filling system and its control method Download PDFInfo
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- CN108827789A CN108827789A CN201810821981.4A CN201810821981A CN108827789A CN 108827789 A CN108827789 A CN 108827789A CN 201810821981 A CN201810821981 A CN 201810821981A CN 108827789 A CN108827789 A CN 108827789A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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Abstract
The invention discloses a kind of hydraulic press rapid water filling systems, including fluid power system, water charging system, water-filling exhaust system, the fluid power system to include：Hydraulic oil source, hydraulic control valve, hydraulic cylinder, the water charging system include：Water pump, filter, first check-valve, the first Pneumatic valve, high water tank, second check-valve, the water-filling exhaust system include：Water-filling cylinder, pressure switch, the second Pneumatic valve, third check-valves, water column dispersion plate, third Pneumatic valve, furthermore the invention also discloses a kind of hydraulic press rapid water filling system control methods, present apparatus filled water amount is big, exhaust velocity is fast, filling time greatly shortens, and greatly improves the rhythm of production of hydraulic press；The present apparatus carries out water-filling using Driven by Hydraulic Cylinder, can be more stable, controllable with filling flow and pressure and other parameters；The present apparatus uses PLC Automatic Control hydraulic press rapid water filling process, easy to operate, easy to maintain, reduces the labor intensity of worker, improves production efficiency.
Description
Technical field
The present invention relates to cast-iron pipe technical field of processing equipment, specifically a kind of hydraulic press rapid water filling system and its control
Method processed.
Background technique
Hydraulic press is a kind of machine for carrying out hydrostatic test to steel pipe using oil-water balance control.It mainly has following several
Part forms：Steel pipe transmission device, water circuit system, oil piping system and control system.Hydraulic pressure machine equipment is for detecting cast tube pressure-bearing
Ability plays the safe handling in cast tube future vital.After each cast tube has to pass through hydraulic pressure machine testing qualification
It can just put goods on the market.
With the quickening of cast tube production line rhythm of production, hydraulic press is increasingly becoming the restriction ring of whole production line rhythm of production
Section, especially low pressure water-filling take a long time, seriously affect the entire process time of hydraulic press, reduce production efficiency.
Summary of the invention
The purpose of the present invention is to provide a kind of hydraulic press rapid water filling system and its control methods, to solve above-mentioned background
The problem of being proposed in technology.
To achieve the above object, the present invention provides the following technical solutions：
A kind of hydraulic press rapid water filling system, including fluid power system, water charging system, water-filling exhaust system, the hydraulic drive
Dynamic system includes：Hydraulic oil source, hydraulic control valve, hydraulic cylinder, the hydraulic oil source and hydraulic cylinder, connection hydraulic oil source with it is hydraulic
Hydraulic control valve is provided between cylinder, the water charging system includes：Water pump, filter, first check-valve, the first Pneumatic valve, height
Position water tank, second check-valve, the water pump are connected to the filter, and the filter is connect with high water tank, filter and a high position
It is provided with the first Pneumatic valve between water tank, air cleaner, liquid level relay and partition are equipped in the high water tank, it is described to fill
Water exhaust system includes：Water-filling cylinder, pressure switch, the second Pneumatic valve, third check-valves, water column dispersion plate, third Pneumatic valve,
The water-filling cylinder is connect with hydraulic cylinder, first check-valve is provided between water-filling cylinder and water pump, between water-filling cylinder and high water tank
It is provided with second check-valve, water-filling cylinder is connect with water column dispersion plate, and the second gas control is provided between water-filling cylinder and water column dispersion plate
Valve and third check-valves and pressure switch, third Pneumatic valve is provided on water column dispersion plate, and the water column dispersion plate is equipped with more
A mesh, multiple meshes are circumferentially distributed, and the mesh dense distribution on water column dispersion plate top, the mesh of water column dispersion plate lower part
Loose distribution.
As a further solution of the present invention：The hydraulic oil source is constant pressure variable displacement pump.
As a further solution of the present invention：The hydraulic cylinder show that piston rod and the piston rod of water-filling cylinder are fixedly connected,
The hydraulic cylinder has displacement sensor.
As a further solution of the present invention：The water pump is single-suction multilevel segmented centrifugal pump.
As a further solution of the present invention：The water-filling cylinder rodless cavity is equipped with 2 interfaces, and water-filling the cylinder piston is equipped with solid
Lubricating grease.
As a further solution of the present invention：The water-filling cylinder is divided into several small-sized water-filling cylinders.
A kind of control method of hydraulic press rapid water filling system, includes the following steps：（1）The moisturizing stage：Hydraulic cylinder drives
Water-filling the cylinder piston is stretched out, and water-filling cylinder rodless cavity forms negative pressure, and high water tank is by second check-valve quickly to water-filling cylinder rodless cavity
Moisturizing, meanwhile, water pump passes through first check-valve to water-filling cylinder moisturizing；After water-filling the cylinder piston is fully extended, water-filling cylinder rodless cavity
Pressure gradually rise, after reaching certain pressure, second check-valve is closed, and water pump individually to water-filling cylinder rodless cavity moisturizing, works as pressure
When power is increased to pressure switch setting pressure, PLC controls water pump termination of pumping；Liquid level is detected in the liquid level relay of high water tank
When low signal, PLC controls the first Pneumatic valve and opens, and water pump is to high water tank moisturizing, until liquid level high RST occurs；（2）Water-filling
Exhaust phase：PLC controls the second Pneumatic valve, third Pneumatic valve is opened, while controlling hydraulic cylinder and water-filling the cylinder piston is driven to withdraw, and fills
Water in water vat is quickly filled in cast tube, while the air in cast tube is discharged by third Pneumatic valve, and pressure switch is examined at this time
It is lower to measure pressure, when water is full of entire cast tube, pressure switch can detect an apparent pressure rise signal, at this time
PLC controls the second Pneumatic valve and third Pneumatic valve and closes, and hydraulic cylinder continues that water-filling the cylinder piston is driven to withdraw at this time, when water-filling cylinder without
When rod cavity pressure rise sets pressure to pressure switch, PLC controls hydraulic cylinder and locks, and detects in hydraulic cylinder displacement sensor
When oil cylinder is stretched out in place fastly, the moisturizing stage is opened.
As a further solution of the present invention：The step（1）The moisturizing stage further includes：When the liquid level relay of high water tank
When device detects liquid level superelevation signal, system alarm, while PLC controls water pump termination of pumping.
As a further solution of the present invention：The step（1）The moisturizing stage further includes：When supplementing water pressure is more than setting value
When 10%, system alarm, while PLC controls water pump termination of pumping.
As a further solution of the present invention：The step（2）Water-filling exhaust phase also needs the setting filling time, works as water-filling
Time is more than setting value, and when apparent pressure rise signal is still not detected in pressure switch, system alarm stops water-filling, institute
State step（2）Setting water-filling is also needed to be displaced, when hydraulic cylinder displacement is more than setting value 10%, system alarm stops water-filling.
Compared with prior art, the beneficial effects of the invention are as follows：1. filled water amount of the present invention is big, exhaust velocity is fast, when water-filling
Between greatly shorten, greatly improve the rhythm of production of hydraulic press；2. the present invention carries out water-filling using Driven by Hydraulic Cylinder, can be with
Filling flow and pressure and other parameters are more stable, controllable；3. the present invention uses PLC Automatic Control hydraulic press rapid water filling mistake
Journey, it is easy to operate, easy to maintain, the labor intensity of worker is reduced, production efficiency is improved.
Detailed description of the invention
Fig. 1 is principle schematic diagram of the present invention；
In figure：1 hydraulic oil source, 2 hydraulic control valves, 3 hydraulic cylinders, 4 water pumps, 5 filters, 6 first check-valves, 7 first Pneumatic valves,
8 high water tanks, 9 partitions, 10 air filters, 11 liquid level relays, 12 second check-valves, 13 water-filling cylinders, 14 pressure switches,
15 second Pneumatic valves, 16 third check-valves, 17 water column dispersion plates, 18 third Pneumatic valves.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the invention.In addition, term " first ", " second " etc. are used for description purposes only, it is not understood to indicate or imply phase
To importance or implicitly indicate the quantity of indicated technical characteristic.The feature for defining " first ", " second " etc. as a result, can
To explicitly or implicitly include one or more of the features.In the description of the present invention, unless otherwise indicated, " multiple "
It is meant that two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition
Concrete meaning in the present invention.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
Refering to fig. 1, in the embodiment of the present invention, a kind of hydraulic press rapid water filling system, including fluid power system, moisturizing system
System, water-filling exhaust system, the fluid power system include：Hydraulic oil source 1, hydraulic control valve 2, hydraulic cylinder 3, the hydraulic oil
Source 1 and hydraulic cylinder 3 connect and are provided with hydraulic control valve 2 between hydraulic oil source 1 and hydraulic cylinder 3, and the water charging system includes：Water
Pump 4, filter 5, first check-valve 6, the first Pneumatic valve 7, high water tank 8, second check-valve 12, the water pump 4 and filter 5
Connection, the filter 5 are connect with high water tank 8, and the first Pneumatic valve 7 is provided between filter 5 and high water tank 8, described
Water-filling exhaust system includes：Water-filling cylinder 13, pressure switch 14, the second Pneumatic valve 15, third check-valves 16, water column dispersion plate
17, third Pneumatic valve 18, the water-filling cylinder 13 are connect with hydraulic cylinder 3, are provided with first check-valve between water-filling cylinder 13 and water pump 4
6, second check-valve 12 is provided between water-filling cylinder 13 and high water tank 8, water-filling cylinder 13 is connect with water column dispersion plate 17, water-filling cylinder
The second Pneumatic valve 15 and third check-valves 16 and pressure switch 14, water column dispersion plate are provided between 13 and water column dispersion plate 17
Third Pneumatic valve 18 is provided on 17.
The hydraulic oil source 1 is constant pressure variable displacement pump.
The hydraulic cylinder 3 show that piston rod and the piston rod of water-filling cylinder 13 are fixedly connected, and the hydraulic cylinder 3 is passed with displacement
Sensor.
The water pump 4 is single-suction multilevel segmented centrifugal pump.
10 device of air-filtering, liquid level relay 11 and partition 9 are equipped in the high water tank 8.
13 rodless cavity of water-filling cylinder is equipped with 2 interfaces, and 13 piston of water-filling cylinder is equipped with solid lubrication rouge.
The water-filling cylinder 13 is divided into several small-sized water-filling cylinders.
The water column dispersion plate 17 is equipped with multiple meshes, and multiple meshes are circumferentially distributed, and 17 top of water column dispersion plate
Mesh dense distribution, the loose distribution of mesh of 17 lower part of water column dispersion plate.
Hydraulic oil source 1, the power source as fluid power system；Hydraulic oil source 1 is by 2 A4VSO140 perseverances in the present embodiment
Pressure variable amount pump group is at 2 pumps are simultaneously to system fuel feeding；
Hydraulic control valve 2, receives the control signal of PLC, and control hydraulic cylinder 3 is stretched out and withdrawn；Hydraulic control valve 2 in the present embodiment
It is made of 4 electro-hydraulic reversing valves, individually controls；
Hydraulic cylinder 3, as the executive component of hydraulic system, the piston rod of piston rod and water-filling cylinder 13 is connected；In the present embodiment
Hydraulic cylinder 3 is made of 4 hydraulic cylinders, has displacement sensor；
Water pump 4, for providing water to water filling system；Water pump 4 uses single-suction multilevel segmented centrifugal pump, lift in the present embodiment
0.8MPa；
Filter 5, being arranged prevents the components such as water-filling cylinder 13, Pneumatic valve for guaranteeing the precision of water in 4 exit of water pump
Abrasion；
First check-valve 6 is arranged between filter 5 and the rodless cavity of water-filling cylinder 13；
First Pneumatic valve 7 is arranged between filter 5 and high water tank 8, is controlled by PLC, in the liquid level relay of high water tank
It opens when 11 sending liquid level low signal, is closed when issuing liquid level high RST；
High water tank 8 is arranged between the first Pneumatic valve 7 and second check-valve 12, is used for when water-filling cylinder 13 is withdrawn, to water-filling
The quick moisturizing of cylinder rodless cavity；High water tank 8 is equipped with partition 9, air cleaner 10, liquid level relay 11；Partition 9 is for allowing height
Impurity in the water of position water tank preferably precipitates.
Second check-valve 12 is arranged between high water tank 8 and the rodless cavity of water-filling cylinder 13；
Water-filling cylinder 13, for nodular cast iron Guan Shui, rod chamber to be communicated with atmosphere, rodless cavity and 15 phase of the second Pneumatic valve
Even；Water-filling cylinder 13 is made of 4 water-filling cylinders in the present embodiment, is driven by hydraulic cylinder 3, according to the default of PLC controller, difference rule
When lattice cast tube fills the water, by 1 or more water-filling cylinder movements；
Pressure switch 14 is arranged between the rodless cavity of water-filling cylinder 13 and the second Pneumatic valve 15, for acquiring supplementing water pressure letter
Number and water-filling complete pressure signal；
Second Pneumatic valve 15, is arranged between the rodless cavity of water-filling cylinder 13 and third check-valves 16, is controlled by PLC, in water-filling cylinder
It is opened when 13 water-filling, remaining time closes；
Third check-valves 16 is arranged between the second Pneumatic valve 15 and water blocking dispersion plate 17；
Water column dispersion plate 17 is arranged between third check-valves 16 and hydraulic press barricade water inlet pipe, for dispersing water-filling water column, subtracts
Few water flow fluctuation；Water column dispersion plate 17 is equipped with multiple meshes in the present embodiment, is circumferentially distributed, and top comparatively dense, and lower part is omited
It is loose；
Third Pneumatic valve 18 is arranged on the bell and spigot barricade of hydraulic press, is controlled by PLC, by the water in cast tube when water-filling is completed
Closing, prepares to beat high pressure.
A kind of control method of hydraulic press rapid water filling system, includes the following steps：（1）The moisturizing stage：Hydraulic cylinder 3 drives
13 piston of water-filling cylinder stretches out, and 13 rodless cavity of water-filling cylinder forms negative pressure, and high water tank 8 is by second check-valve 12 quickly to water-filling cylinder
13 rodless cavity moisturizings, meanwhile, water pump passes through first check-valve 6 to 13 moisturizing of water-filling cylinder；After 13 piston of water-filling cylinder is fully extended,
The pressure of 13 rodless cavity of water-filling cylinder gradually rises, and after reaching certain pressure, second check-valve 12 is closed, and water pump 4 is individually to water-filling
13 rodless cavity moisturizing of cylinder, when pressure rise to pressure switch 14 sets pressure, PLC controls 4 termination of pumping of water pump；In high water tank
When 8 liquid level relay 11 detects liquid level low signal, PLC controls the first Pneumatic valve 7 and opens, and water pump 4 is mended to high water tank 8
Water, until liquid level high RST occurs；（2）Water-filling exhaust phase：PLC controls the second Pneumatic valve 12, third Pneumatic valve 15 is opened, together
When control hydraulic cylinder 3 drive 13 piston of water-filling cylinder to withdraw, the water in water-filling cylinder 13 is quickly filled in cast tube, while the sky in cast tube
Gas is discharged by third Pneumatic valve 15, and pressure switch 14 detects that pressure is lower at this time, when water is full of entire cast tube, pressure
Relay 14 can detect an apparent pressure rise signal, and PLC controls the second Pneumatic valve 12 and third Pneumatic valve 15 at this time
It closes, hydraulic cylinder 3 continues that water-filling the cylinder piston is driven to withdraw at this time, when 13 rodless cavity pressure rise of water-filling cylinder to pressure switch 14
When setting pressure, PLC controls hydraulic cylinder 3 and locks, and when the displacement sensor of hydraulic cylinder 3 detects that oil cylinder stretches out in place fastly, opens
Open the moisturizing stage.
The step（1）The moisturizing stage further includes：When the liquid level relay 11 of high water tank 8 detects liquid level superelevation signal
When, system alarm, while PLC controls 4 termination of pumping of water pump.
The step（1）The moisturizing stage further includes：When supplementing water pressure is more than setting value 10%, system alarm, while PLC
Control 4 termination of pumping of water pump.
The step（2）Water-filling exhaust phase also needs the setting filling time, is more than setting value, pressure relay when the filling time
When apparent pressure rise signal is still not detected in device 14, system alarm stops water-filling, the step（2）Also need setting water-filling
Displacement, when the displacement of hydraulic cylinder 3 is more than setting value 10%, system alarm stops water-filling.
Filled water amount of the present invention is big, and exhaust velocity is fast, and the filling time greatly shortens, and greatly improves the production section of hydraulic press
It plays；The present invention carries out water-filling using Driven by Hydraulic Cylinder, can be more stable, controllable with filling flow and pressure and other parameters；The present invention
It is easy to operate, easy to maintain using PLC Automatic Control hydraulic press rapid water filling process, the labor intensity of worker is reduced, is mentioned
High production efficiency.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of hydraulic press rapid water filling system, including fluid power system, water charging system, water-filling exhaust system, feature exist
In the fluid power system includes：Hydraulic oil source, hydraulic control valve, hydraulic cylinder, the hydraulic oil source and hydraulic cylinder, connection
Hydraulic control valve is provided between hydraulic oil source and hydraulic cylinder, the water charging system includes：Water pump, filter, first check-valve,
First Pneumatic valve, high water tank, second check-valve, the water pump are connected to the filter, and the filter is connect with high water tank,
It is provided with the first Pneumatic valve between filter and high water tank, is equipped with air cleaner, liquid level relay in the high water tank
And partition, the water-filling exhaust system include：Water-filling cylinder, pressure switch, the second Pneumatic valve, third check-valves, water column dispersion
Plate, third Pneumatic valve, the water-filling cylinder are connect with hydraulic cylinder, and first check-valve, water-filling cylinder are provided between water-filling cylinder and water pump
Second check-valve is provided between high water tank, water-filling cylinder is connect with water column dispersion plate, between water-filling cylinder and water column dispersion plate
It is provided with the second Pneumatic valve and third check-valves and pressure switch, third Pneumatic valve, the water are provided on water column dispersion plate
Column dispersion plate is equipped with multiple meshes, and multiple meshes are circumferentially distributed, and the mesh dense distribution on water column dispersion plate top, water column point
It falls apart the loose distribution of mesh of lower part.
2. a kind of hydraulic press rapid water filling system according to claim 1, which is characterized in that the hydraulic oil source is constant pressure
Variable pump.
3. a kind of hydraulic press rapid water filling system according to claim 1, which is characterized in that the hydraulic cylinder obtains piston
Bar is fixedly connected with the piston rod of water-filling cylinder, and the hydraulic cylinder has displacement sensor.
4. a kind of hydraulic press rapid water filling system according to claim 1, which is characterized in that the water pump is single-suction multilevel
Segmented centrifugal pump.
5. a kind of hydraulic press rapid water filling system according to claim 3, which is characterized in that the water-filling cylinder rodless cavity is set
There are 2 interfaces, water-filling the cylinder piston is equipped with solid lubrication rouge.
6. a kind of hydraulic press rapid water filling system according to claim 5, which is characterized in that the water-filling cylinder is divided into several
Small-sized water-filling cylinder.
7. a kind of control method of hydraulic press rapid water filling system as described in claim 1, which is characterized in that including walking as follows
Suddenly：
（1）The moisturizing stage：Hydraulic cylinder drives water-filling the cylinder piston to stretch out, and water-filling cylinder rodless cavity forms negative pressure, and high water tank passes through the
Two check-valves quickly to water-filling cylinder rodless cavity moisturizing, meanwhile, water pump is by first check-valve to water-filling cylinder moisturizing；It is living in water-filling cylinder
Fill in it is fully extended after, the pressure of water-filling cylinder rodless cavity gradually rises, after reaching certain pressure, second check-valve close, water pump list
Solely to water-filling cylinder rodless cavity moisturizing, when pressure rise to pressure switch sets pressure, PLC controls water pump termination of pumping；In a high position
When the liquid level relay of water tank detects liquid level low signal, PLC controls the first Pneumatic valve and opens, water pump to high water tank moisturizing,
Until liquid level high RST occurs；
（2）Water-filling exhaust phase：PLC controls the second Pneumatic valve, third Pneumatic valve is opened, while controlling hydraulic cylinder and driving water-filling cylinder
Piston is withdrawn, and the water in water-filling cylinder is quickly filled in cast tube, while the air in cast tube is discharged by third Pneumatic valve, is pressed at this time
Power relay test is lower to pressure, and when water is full of entire cast tube, pressure switch can detect an apparent pressure liter
High RST, PLC controls the second Pneumatic valve at this time and third Pneumatic valve is closed, and hydraulic cylinder continues that water-filling the cylinder piston is driven to receive at this time
It returns, when water-filling cylinder rodless cavity pressure rise to pressure switch sets pressure, PLC controls hydraulic cylinder and locks, in hydraulic cylinder position
When displacement sensor detects that oil cylinder is stretched out in place fastly, the moisturizing stage is opened.
8. a kind of control method of hydraulic press rapid water filling system as claimed in claim 7, which is characterized in that the step
（1）The moisturizing stage further includes：When the liquid level relay of high water tank detects liquid level superelevation signal, system alarm, while PLC
Control water pump termination of pumping.
9. a kind of control method of hydraulic press rapid water filling system as claimed in claim 7, which is characterized in that the step
（1）The moisturizing stage further includes：When supplementing water pressure is more than setting value 10%, system alarm, while PLC controls water pump termination of pumping.
10. a kind of control method of hydraulic press rapid water filling system as claimed in claim 7, which is characterized in that the step
（2）Water-filling exhaust phase also needs the setting filling time, is more than setting value when the filling time, and pressure switch is still not detected obviously
Pressure rise signal when, system alarm, stop water-filling, the step（2）Setting water-filling is also needed to be displaced, when hydraulic cylinder displacement is super
When crossing setting value 10%, system alarm stops water-filling.
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| CN201810821981.4A CN108827789A (en) | 2018-07-24 | 2018-07-24 | A kind of hydraulic press rapid water filling system and its control method |
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| CN201810821981.4A CN108827789A (en) | 2018-07-24 | 2018-07-24 | A kind of hydraulic press rapid water filling system and its control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112551851A (en) * | 2020-07-13 | 2021-03-26 | 杭州国泰环保科技股份有限公司 | Environment-friendly energy-saving type automatic pressure control system |
| CN112903420A (en) * | 2021-01-20 | 2021-06-04 | 新兴河北工程技术有限公司 | Self-adjusting exhaust device of hydraulic press |
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