CN108561351A - Hydraulic system and clamping device suitable for steel pipe hydrostatic tester clamping device - Google Patents
Hydraulic system and clamping device suitable for steel pipe hydrostatic tester clamping device Download PDFInfo
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- CN108561351A CN108561351A CN201810270916.7A CN201810270916A CN108561351A CN 108561351 A CN108561351 A CN 108561351A CN 201810270916 A CN201810270916 A CN 201810270916A CN 108561351 A CN108561351 A CN 108561351A
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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
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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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/01—Locking-valves or other detent i.e. load-holding devices
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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
- 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
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/007—Overload
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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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/02—Servomotor systems with programme control derived from a store or timing device; Control devices therefor
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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
- G01N3/02—Details
- G01N3/04—Chucks
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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
- 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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- 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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0274—Tubular or ring-shaped specimens
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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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
- G01N2203/0411—Chucks, fixtures, jaws, holders or anvils using pneumatic or hydraulic pressure
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses the hydraulic systems and clamping device suitable for steel pipe hydrostatic tester clamping device, compared with prior art, by the way that displacement sensor is arranged on hydraulic cylinder, it is used cooperatively with proportional direction valve, hydraulic cylinder any time can be made to stay in any position, off-position is accurate, adjusts more convenient, shorten regulating time, improves production efficiency；It by the way that mechanical overflow valve and electromagnetic relief valve are arranged in systems, can effectively prevent during steel tube pressure-measuring that pressure increases suddenly in hydraulic cylinder, protect the Hydraulic Elements in system, improve the reliability of whole system；By the way that hydraulically-controlled one-way valve is arranged, the fluid for keeping steel pipe in pressure testing pressure maintaining period in hydraulic cylinder high pressure chest can be reliably blocked, the reliable grip of steel pipe is realized, plays the role of safeguard protection；By the analog output signal of pressure switch, be conducive to the acquisition and transmission of live clamping pressure signal, be more advantageous to the control of entire steel pipe process.
Description
Technical field
The present invention relates to steel pipe hydrostatic tester clamping devices to be suitable for hydraulic system technical field more particularly to one kind
The hydraulic system and clamping device of steel pipe hydrostatic tester clamping device.
Background technology
Steel pipe fixture is a very important independent agency in steel pipe hydrostatic tester, is used for entire pressure testing process
Middle clamping steel pipe, plays steel pipe particularly important effect, as hydraulicdriven steel pipe fixture structure, upper clamping device
It is driven respectively by upper compression hydraulic cylinder and lower compression hydraulic cylinder with lower clamping device, upper clamping device and lower clamping device are pacified respectively
Mounted in the piston rod head of upper compression hydraulic cylinder and lower compression hydraulic cylinder, upper compression hydraulic cylinder is mounted on upper beam, lower clamping
Hydraulic cylinder is mounted on pedestal.The defect of the hydraulic system of existing steel pipe fixture is：First, hydraulic cylinder each run intelligence
Energy full stroke is made troubles without pause function among stroke to equipment debugging；Two steel pipes in clamping process, reversal valve
Solenoid valve must be always maintained at energized state, if powering off for some reason, clamping device will unclamp the steel pipe in pressure testing, may cause accident
Generation；Third, steel pipe is in pressure testing pressure maintaining period, in fact it could happen that deformation causes increasing for oil pressure in compression hydraulic cylinder, makes liquid
The connected pipes of cylinder pressure rupture, so some users are usually left unused, clamping device does not have to, and loses the peace during steel tube pressure-measuring
Full guard acts on.
Therefore, to solve the above-mentioned problems, it is badly in need of a kind of new steel pipe hydrostatic tester clamping device that is suitable for of invention
Hydraulic system and clamping device.
Invention content
Defect present in for the above-mentioned prior art, it is an object of the invention to：It provides a kind of suitable for steel pipe hydraulic pressure
The hydraulic system and clamping device of testing machine clamping device are adjusted and are more convenient, and are shortened regulating time, are improved production efficiency.
In order to solve above-mentioned technical problem, what the present invention was achieved：
The present invention provides following proposals：
A kind of hydraulic system suitable for steel pipe hydrostatic tester clamping device, including it is installed on the upper clamping liquid of hydrostatic testing machine
Cylinder pressure and lower compression hydraulic cylinder；
The upper compression hydraulic cylinder and upper hydraulically-controlled one-way valve, upper 3-position 4-way electrohydraulic proportional directional valve, pressure reducing valve, electromagnetic relief valve
It is sequentially connected by pipeline, the electromagnetic relief valve passes through piping connection respectively with the upper compression hydraulic cylinder and hydraulic oil container；
The lower compression hydraulic cylinder passes through pipe with lower 3-position 4-way electrohydraulic proportional directional valve, lower hydraulically-controlled one-way valve, mechanical overflow valve
Road is sequentially connected, and the machinery overflow valve passes through piping connection respectively with the lower compression hydraulic cylinder and hydraulic oil container；
The upper 3-position 4-way electrohydraulic proportional directional valve and lower 3-position 4-way electrohydraulic proportional directional valve are distinguished with the hydraulic oil container
Pass through piping connection.
Preferably, the pipeline between the lower compression hydraulic cylinder and mechanical overflow valve is equipped with pressure switch, for adopting
Collect clamping pressure.
Preferably, the hydraulic system suitable for steel pipe hydrostatic tester clamping device further includes central controller,
The pressure switch, the upper 3-position 4-way electrohydraulic proportional directional valve and the lower 3-position 4-way electrohydraulic proportional directional valve difference
It is electrically connected with the central controller.
Preferably, the upper compression hydraulic cylinder is equipped with upper displacement sensor, for detecting in the upper compression hydraulic cylinder
The position of piston, and location information is sent to central controller, the control for controlling upper 3-position 4-way electrohydraulic proportional directional valve
The size of electric current processed.
Preferably, the lower compression hydraulic cylinder is equipped with the next displacement sensor, for detecting in the lower compression hydraulic cylinder
The position of piston, and location information is sent to central controller, the control for controlling lower 3-position 4-way electrohydraulic proportional directional valve
The size of electric current processed.
Preferably, the lower position sensing and upper position sensor are electrically connected with central controller respectively.
Preferably, the electromagnetic relief valve is electrically connected with the central controller, for according to the pressure switch
Pressure value controls the opening and closing of the electromagnetic relief valve.
Preferably, the upper hydraulically-controlled one-way valve and the lower hydraulically-controlled one-way valve are any in ball valve, plunger valve.
Further, the present invention also provides a kind of clamping device suitable for steel pipe hydrostatic tester, including it is described
Hydraulic system suitable for steel pipe hydrostatic tester clamping device.
Preferably, the clamping device suitable for steel pipe hydrostatic tester further includes connecting with the upper compression hydraulic cylinder
The upper clamping device connect and the upper clamping device being connect with the lower compression hydraulic cylinder carry out pressurization pressurize for clamping steel pipe
Experiment.
Hydraulic system and clamping device provided by the invention suitable for steel pipe hydrostatic tester clamping device, with existing skill
Art is compared, and has such advantageous effect：
1, it by the way that displacement sensor is arranged on hydraulic cylinder, is used cooperatively with proportional direction valve, hydraulic cylinder any time can be made
Any position is stayed in, off-position is accurate, adjusts and is more convenient, and shortens regulating time, improves production efficiency；
2, by the way that mechanical overflow valve and electromagnetic relief valve are arranged in systems, hydraulic cylinder during steel tube pressure-measuring can be effectively prevent
Middle pressure increases suddenly, protects the Hydraulic Elements in system, improves the reliability of whole system；
3, by the way that hydraulically-controlled one-way valve is arranged, it can reliably block and keep steel pipe in pressure testing pressure maintaining period in hydraulic cylinder high pressure chest
Fluid realizes the reliable grip of steel pipe, plays the role of safeguard protection；
4, by the analog output signal of pressure switch, be conducive to the acquisition and transmission of live clamping pressure signal, more favorably
In the control of entire steel pipe process.
Description of the drawings
Fig. 1 is the overall schematic of present hydraulic system；
Fig. 2 is the electrical connection figure between the energy saving each component of the present invention；
Fig. 3 is the structural schematic diagram of clamping device of the present invention.
In figure, 1, upper compression hydraulic cylinder；2, lower compression hydraulic cylinder；3, upper clamping device；4, lower clamping device；5, pipeline；
6, pedestal；7, electromagnetic relief valve；8, mechanical overflow valve；9, upper hydraulically-controlled one-way valve；10, upper 3-position 4-way electrohydraulic proportional directional valve；
11, pressure reducing valve；12, lower 3-position 4-way electrohydraulic proportional directional valve；13, lower hydraulically-controlled one-way valve；14, pressure switch；15, center control
Device processed；16, upper displacement sensor；17, the next displacement sensor.
Specific implementation mode
Technical scheme of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
The every other embodiment that personnel are obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term "center", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for the description present invention and simplify description, do not indicate or imply the indicated device or element must have a particular orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for description purposes only, and is not understood to indicate or imply relative importance.
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
Can also be electrical connection to be mechanical connection；It can be directly connected, can also indirectly connected through an intermediary, Ke Yishi
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Embodiment one
Shown in Fig. 1 to Fig. 3, a kind of hydraulic system suitable for steel pipe hydrostatic tester clamping device, including it is installed on water
Press the upper compression hydraulic cylinder 1 and lower compression hydraulic cylinder 2 of testing machine；The upper compression hydraulic cylinder 1 and upper hydraulically-controlled one-way valve 9, upper three
Position four-way electrohydraulic proportional directional valve 10, pressure reducing valve 11, electromagnetic relief valve 7 are sequentially connected by pipeline 5, the electromagnetic relief valve 7
It is connect respectively by pipeline 5 with the upper compression hydraulic cylinder 1 and hydraulic oil container；The lower compression hydraulic cylinder 2 and lower 3-position 4-way
Electrohydraulic proportional directional valve 12, lower hydraulically-controlled one-way valve 13, mechanical overflow valve 8 are sequentially connected by pipeline 5, the machinery overflow valve 8
It is connect respectively by pipeline 5 with the lower compression hydraulic cylinder 2 and hydraulic oil container；The upper 3-position 4-way electrohydraulic proportional directional valve 10
It is connect respectively by pipeline 5 with the hydraulic oil container with the lower 3-position 4-way electrohydraulic proportional directional valve 12.The lower clamping liquid
Pipeline between cylinder pressure 2 and the mechanical overflow valve 8 is equipped with pressure switch 14, for acquiring clamping pressure.Described is suitable
Hydraulic system for steel pipe hydrostatic tester clamping device further includes central controller 15, the pressure switch 14, described
Upper 3-position 4-way electrohydraulic proportional directional valve 10 and the lower 3-position 4-way electrohydraulic proportional directional valve 12 are controlled with the center respectively
Device 15 is electrically connected.The upper compression hydraulic cylinder 1 is equipped with upper displacement sensor 16, for detecting in the upper compression hydraulic cylinder 1
The position of piston, and location information is sent to central controller 15, for controlling the upper 3-position 4-way electric-hydraulic proportion direction
The size of the control electric current of valve 10.The lower compression hydraulic cylinder 2 is equipped with the next displacement sensor 17, for detecting the lower clamping
The position of piston in hydraulic cylinder 2, and location information is sent to central controller 15, it is electro-hydraulic for controlling the lower 3-position 4-way
The size of the control electric current of proportional direction valve 12.It is described bottom displacement sensor 17 and the upper displacement sensor 16 respectively with it is described
Central controller 15 is electrically connected.The electromagnetic relief valve 7 is electrically connected with the central controller 15, for according to the pressure after
The pressure value of electric appliance 14 controls the opening and closing of the electromagnetic relief valve 7.The upper hydraulically-controlled one-way valve 9 is ball valve, under described
Hydraulically-controlled one-way valve 13 is ball valve.
The hydraulic system suitable for steel pipe hydrostatic tester clamping device described in the present embodiment, by hydraulic cylinder
Displacement sensor is set, is used cooperatively with proportional direction valve, hydraulic cylinder any time can be made to stay in any position, off-position essence
Standard is adjusted and is more convenient, and is shortened regulating time, is improved production efficiency；It is overflow by the way that mechanical overflow valve and electromagnetism are arranged in systems
Valve is flowed, can effectively prevent during steel tube pressure-measuring that pressure increases suddenly in hydraulic cylinder, the Hydraulic Elements in system is protected, carries
The high reliability of whole system；By the way that hydraulically-controlled one-way valve is arranged, it can reliably block and keep steel pipe in pressure testing pressure maintaining period
Fluid in hydraulic cylinder high pressure chest realizes the reliable grip of steel pipe, plays the role of safeguard protection；Pass through the mould of pressure switch
Quasi- output signal, is conducive to the acquisition and transmission of live clamping pressure signal, is more advantageous to the control of entire steel pipe process.
The operation principle of the hydraulic system suitable for steel pipe hydrostatic tester clamping device described in the present embodiment is：
When clamping device receives clamping steel pipe instruction, the electromagnet of upper 3-position 4-way electrohydraulic proportional directional valve 10 is entered certain numerical value
Positive input current, from oil circuit for next pressure oil through upper 3-position 4-way electrohydraulic proportional directional valve 10, pressure reducing valve 11, electromagnetism overflow
Valve 7 enters the rodless cavity of upper compression hydraulic cylinder 1, while hydraulically-controlled one-way valve 9 on reverse-conducting, and clamping device is into steel pipe in promotion
Heart line direction is run, and the fluid in rod chamber flows back to hydraulic pressure through upper one-way throttle valve and upper 3-position 4-way electrohydraulic proportional directional valve 10
Fuel tank；Meanwhile the electromagnet of lower 3-position 4-way electrohydraulic proportional directional valve 12 is entered the positive input current of certain numerical value, from oil
Road enters the rodless cavity of lower compression hydraulic cylinder 2 for next pressure oil through lower hydraulically-controlled one-way valve 13, mechanical overflow valve 8, pushes lower press from both sides
Clamper is run to steel pipe centerline direction, and the fluid in rod chamber flows back to hydraulic pressure through lower 3-position 4-way electrohydraulic proportional directional valve 12
Fuel tank.The upper position sensor 16 and lower position sensor that upper compression hydraulic cylinder 1 and lower compression hydraulic cylinder 2 are installed thereon respectively
17 controls, will stop in a certain specific position, upper clamping device 3 and lower clamping device 4 by steel tube clamping on pressure testing center line,
Pressure switch 14 transmits clamping signal to central controller 15, upper 3-position 4-way electrohydraulic proportional directional valve 10 and lower 3-position 4-way
It is located at zero-bit at the reception signal of electrohydraulic proportional directional valve 12, there is no electric current inputs.At this point, upper hydraulically-controlled one-way valve 9 and lower liquid
Upper clamping device 3 and lower clamping device 4 are locked in clamped position by pressure check valve 13.If in pressure testing pressure maintaining period, steel pipe
Pressure rise in hydraulic cylinder caused by deformation, electromagnetic relief valve 7 and mechanical overflow valve 8 will open overflow.By process control needs
When clamping device unclamps, the electromagnet of upper 3-position 4-way electrohydraulic proportional directional valve 10 is entered the reversed input current of certain numerical value
And electromagnetic relief valve 7 is powered, pressure oil enters upper clamping through upper 3-position 4-way electrohydraulic proportional directional valve 10 and upper hydraulically-controlled one-way valve 9
The rod chamber of hydraulic cylinder, clamping device 3 is run away from steel pipe centerline direction in promotion, and the fluid in rodless cavity is through electromagnetism overflow
Valve 7 flows back to hydraulic oil container；Electromagnet with 3-position 4-way electrohydraulic proportional directional valve 12 at present is entered the reversed defeated of certain numerical value
Enter electric current, has bar into lower compression hydraulic cylinder 4 through lower 3-position 4-way electrohydraulic proportional directional valve 12 for the pressure oil come from oil circuit
Chamber, while hydraulically-controlled one-way valve 13 under reverse-conducting push lower clamping device 4 to be run away from steel pipe centerline direction, in rodless cavity
Fluid flow back to hydraulic oil container through lower hydraulically-controlled one-way valve 13 and lower 3-position 4-way electrohydraulic proportional directional valve 12.Clamping device unclamps steel
Pipe, upper clamping device and lower clamping device return to its designated position respectively.
Embodiment two, the present embodiment are improved on the basis of embodiment one, the contents described in embodiment one
It is no longer specifically to be repeated herein possessed by the present embodiment.
It is shown in Figure 3, a kind of clamping device suitable for steel pipe hydrostatic tester, including described it is suitable for steel pipe water
Press testing machine clamping device hydraulic system, the clamping device suitable for steel pipe hydrostatic tester further include with it is described on
The upper clamping device 3 that compression hydraulic cylinder 1 connects and the lower clamping device 4 being connect with the lower compression hydraulic cylinder 2, for clamping
Steel pipe carries out pressurization pressurize experiment.
The clamping device suitable for steel pipe hydrostatic tester described in the present embodiment, by the way that displacement is arranged on hydraulic cylinder
Sensor is used cooperatively with proportional direction valve, and hydraulic cylinder any time can be made to stay in any position, and off-position is accurate, is adjusted
It is more convenient, shorten regulating time, improves production efficiency；By the way that mechanical overflow valve 7 and electromagnetic relief valve 8 are arranged in systems,
It can effectively prevent during steel tube pressure-measuring that pressure increases suddenly in hydraulic cylinder, protect the Hydraulic Elements in system, improve
The reliability of whole system；By the way that hydraulically-controlled one-way valve is arranged, it can reliably block and keep steel pipe hydraulic pressure in pressure testing pressure maintaining period
Fluid in cylinder high pressure chest realizes the reliable grip of steel pipe, plays the role of safeguard protection；It is defeated by the simulation of pressure switch
Go out signal, be conducive to the acquisition and transmission of live clamping pressure signal, is more advantageous to the control of entire steel pipe process.
The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations, although with reference to aforementioned each reality
Applying example, invention is explained in detail, it will be understood by those of ordinary skill in the art that：It still can be to aforementioned each
Technical solution recorded in embodiment is modified, and either carries out equivalent replacement to which part or all technical features；And
These modifications or replacements, the range for various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of hydraulic system suitable for steel pipe hydrostatic tester clamping device, including it is installed on the upper clamping of hydrostatic testing machine
Hydraulic cylinder and lower compression hydraulic cylinder；
The upper compression hydraulic cylinder and upper hydraulically-controlled one-way valve, upper 3-position 4-way electrohydraulic proportional directional valve, pressure reducing valve, electromagnetic relief valve
It is sequentially connected by pipeline, the electromagnetic relief valve passes through piping connection respectively with the upper compression hydraulic cylinder and hydraulic oil container；
The lower compression hydraulic cylinder passes through pipe with lower 3-position 4-way electrohydraulic proportional directional valve, lower hydraulically-controlled one-way valve, mechanical overflow valve
Road is sequentially connected, and the machinery overflow valve passes through piping connection respectively with the lower compression hydraulic cylinder and hydraulic oil container；
The upper 3-position 4-way electrohydraulic proportional directional valve and the lower 3-position 4-way electrohydraulic proportional directional valve and the hydraulic oil container
Pass through piping connection respectively.
2. a kind of hydraulic system suitable for steel pipe hydrostatic tester clamping device according to claim 1, feature exist
In the pipeline between the lower compression hydraulic cylinder and the mechanical overflow valve is equipped with pressure switch, and pressure is clamped for acquiring
Power.
3. a kind of hydraulic system suitable for steel pipe hydrostatic tester clamping device according to claim 1 or 2, feature
Be, the hydraulic system suitable for steel pipe hydrostatic tester clamping device further includes central controller, the pressure after
Electric appliance, upper 3-position 4-way electrohydraulic proportional directional valve and lower 3-position 4-way electrohydraulic proportional directional valve are electrically connected with central controller respectively
It connects.
4. a kind of hydraulic system suitable for steel pipe hydrostatic tester clamping device according to claim 3, feature exist
In, the upper compression hydraulic cylinder is equipped with upper displacement sensor, the position for detecting piston in the upper compression hydraulic cylinder, and
Location information is sent to central controller, for control the upper 3-position 4-way electrohydraulic proportional directional valve control electric current it is big
It is small.
5. a kind of hydraulic system suitable for steel pipe hydrostatic tester clamping device according to claim 3, feature exist
In, the lower compression hydraulic cylinder is equipped with the next displacement sensor, the position for detecting piston in the lower compression hydraulic cylinder, and
Location information is sent to central controller, for control the lower 3-position 4-way electrohydraulic proportional directional valve control electric current it is big
It is small.
6. a kind of hydraulic system suitable for steel pipe hydrostatic tester clamping device according to claim 3, feature exist
In the lower position sensing and the upper position sensor are electrically connected with the central controller respectively.
7. a kind of hydraulic system suitable for steel pipe hydrostatic tester clamping device according to claim 3, feature exist
In the electromagnetic relief valve is electrically connected with the central controller, for controlling institute according to the pressure value of the pressure switch
State the opening and closing of electromagnetic relief valve.
8. a kind of hydraulic system suitable for steel pipe hydrostatic tester clamping device according to claim 1, feature exist
In, upper hydraulically-controlled one-way valve and lower hydraulically-controlled one-way valve be any one in ball valve, plunger valve.
9. a kind of clamping device suitable for steel pipe hydrostatic tester, including the steel pipe hydrostatic tester that is suitable for clamp dress
The hydraulic system set.
10. a kind of hydraulic system suitable for steel pipe hydrostatic tester clamping device according to claim 9, feature exist
In the clamping device suitable for steel pipe hydrostatic tester further includes the upper clamping folder being connect with the upper compression hydraulic cylinder
Tool and the upper clamping device being connect with the lower compression hydraulic cylinder carry out pressurization pressurize experiment for clamping steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810270916.7A CN108561351A (en) | 2018-03-29 | 2018-03-29 | Hydraulic system and clamping device suitable for steel pipe hydrostatic tester clamping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810270916.7A CN108561351A (en) | 2018-03-29 | 2018-03-29 | Hydraulic system and clamping device suitable for steel pipe hydrostatic tester clamping device |
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| Publication Number | Publication Date |
|---|---|
| CN108561351A true CN108561351A (en) | 2018-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810270916.7A Pending CN108561351A (en) | 2018-03-29 | 2018-03-29 | Hydraulic system and clamping device suitable for steel pipe hydrostatic tester clamping device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112033818A (en) * | 2020-09-27 | 2020-12-04 | 湖南楚怀建材有限公司 | External pressure load test device that reinforced concrete drain pipe was made |
| CN113063668A (en) * | 2021-03-20 | 2021-07-02 | 徐萍 | Equipment and method for testing pressure resistance of stainless steel pipe fitting production |
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| CN101608987A (en) * | 2009-07-24 | 2009-12-23 | 太原重工股份有限公司 | The hydraulic control system of steel pipe fixture in the hydraulic pressure test tube machine |
| JP2012194092A (en) * | 2011-03-17 | 2012-10-11 | Shimadzu Corp | Material testing machine |
| CN202916139U (en) * | 2012-11-28 | 2013-05-01 | 中联重科股份有限公司 | Hydraulic system for pipe fitting test |
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| JPH03269235A (en) * | 1990-03-19 | 1991-11-29 | Kowa Seiki Kk | Hydraulic control apparatus |
| JPH0988906A (en) * | 1995-09-25 | 1997-03-31 | Daiichi Denki Kk | Fluid hydraulic drive device with fly wheel |
| CN101608987A (en) * | 2009-07-24 | 2009-12-23 | 太原重工股份有限公司 | The hydraulic control system of steel pipe fixture in the hydraulic pressure test tube machine |
| JP2012194092A (en) * | 2011-03-17 | 2012-10-11 | Shimadzu Corp | Material testing machine |
| CN202916139U (en) * | 2012-11-28 | 2013-05-01 | 中联重科股份有限公司 | Hydraulic system for pipe fitting test |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112033818A (en) * | 2020-09-27 | 2020-12-04 | 湖南楚怀建材有限公司 | External pressure load test device that reinforced concrete drain pipe was made |
| CN113063668A (en) * | 2021-03-20 | 2021-07-02 | 徐萍 | Equipment and method for testing pressure resistance of stainless steel pipe fitting production |
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Application publication date: 20180921 |