CN207762032U - A kind of ratio for deep sea pressure simulation test is pressurized depressurized system - Google Patents
A kind of ratio for deep sea pressure simulation test is pressurized depressurized system Download PDFInfo
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- CN207762032U CN207762032U CN201721772459.9U CN201721772459U CN207762032U CN 207762032 U CN207762032 U CN 207762032U CN 201721772459 U CN201721772459 U CN 201721772459U CN 207762032 U CN207762032 U CN 207762032U
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Abstract
The utility model discloses a kind of ratios for deep sea pressure simulation test to be pressurized depressurized system, including electric-control system, ratio pressure charging system and pressure release system, the ratio pressure charging system includes main pump control pump, main pump control pump is connected with proportional variable pump, the proportional variable pump is connected with booster, booster is connected with pressure measuring cylinder, and pressure measuring cylinder is connected with water tank, the piping connection of water tank and the booster；The pressure release system includes that control pumps, and control pump is connected with solenoid directional control valve, and solenoid directional control valve is connected with super-pressure pressure-relief valve, and super-pressure pressure-relief valve is also connect with the pressure measuring cylinder and water tank.The utility model can adjust rate variable pump output flow, change the pumping rate of booster indirectly, realize the pumping rate of dynamic step-less adjustment；The unlatching quantity of solenoid directional control valve and the orifice union combination of different throttle diameters is selected to can reach different release characteristics by electric-control system；Realize Automatic-boosting release.
Description
Technical field
The utility model is related to deep sea pressure modelling technique fields, are that one kind being used for deep sea pressure mould specifically
The ratio of quasi- experiment is pressurized depressurized system.
Background technology
Large-scale deep sea pressure simulation experiment system is to carry out deep-sea technology and equip in research as special testing equipment
Essential support system.Research of the country in terms of the simulation experiment system of deep-sea starts to walk relatively late, but development speed
Comparatively fast.China to the principal organ of deep sea pressure simulation system research include China Shipbuilding Industry Corporation, the Chinese Academy of Sciences,
Shanghai Communications University, Harbin Engineering University, University Of Tianjin etc..The 702th Research Institute of China Shipbuilding Industry Corporation is for I
State is more early engaged in the development of deep sea pressure environmental simulation system and applies unit, the specification of deep sea pressure environmental simulation system with
And technical capability is on the leading domestic level.But pressure control device in the prior art is generally by controller according to Hall
The feedback of position sensor and pressure sensor triggers governing system, and speed governing, motor band are carried out to motor using PWM mode
Dynamic operation of oil pump, provides lasting pressure source.In this way, although adjustable barometric gradient very little, minimum pressure
Gradient is 1%/min, but still can not achieve pressure it is stepless reconcile release supercharging automatic realization.
Utility model content
The purpose of this utility model is to provide a kind of ratios for deep sea pressure simulation test to be pressurized depressurized system, uses
It is pressurized in solving the problems, such as that pressure control device can not achieve the electrodeless automatically unloading that reconciles of pressure in the prior art.
In order to achieve the above object, the utility model is achieved through the following technical solutions：
A kind of ratio for deep sea pressure simulation test is pressurized depressurized system, including electric-control system and connects with electric-control system
The ratio pressure charging system and pressure release system connect, the ratio pressure charging system include main pump control pump, the main pump control pump
It is connected with proportional variable pump, the proportional variable pump is connected with booster, and the booster is connected with pressure measuring cylinder, the pressure measuring cylinder
It is connected with water tank, the piping connection of water tank and the booster；The pressure release system includes that control pumps, and the control pump connects
Be connected to solenoid directional control valve, the solenoid directional control valve is connected with super-pressure pressure-relief valve, the super-pressure pressure-relief valve also with the pressure
Cylinder is connected with water tank.
Operation principle：
Ratio supercharging depressurized system is made of proportional variable pump, booster, pressure measuring cylinder and water tank and pipeline.Ratio is pressurized
Flow is as follows：Aqueous medium in water tank enters the Zeng Yaqiang of booster, and main pump control pump provides control oil to proportional variable pump, drives
Dynamic proportional variable pump output hydraulic pressure oil, hydraulic oil enter the low-pressure end of booster, pass through booster reversal valve switching right and left chamber oil
Road realizes that booster is back and forth pressurized, while the aqueous medium supercharging in booster cavity being entered in pressure measuring cylinder.According to pascal's principle,
Pressure ratio is equal to the ratio between the cross-sectional area of the cross-sectional area and high-pressure plunger of low-pressure piston.Rate variable pump output flow and supercharging
There are certain proportionate relationships for device output flow, i.e., are inversely proportional with the pressure ratio of booster.It can the change of dynamic step-less adjustment ratio
Pump output flow is measured, changes the pumping rate of booster indirectly, the pumping rate of dynamic step-less adjustment is realized, reaches to pressure measuring cylinder
It is filled with the step-less adjustment of super-pressure medium.Pressure release system is mainly by controlling pump, solenoid directional control valve, super-pressure pressure-relief valve, pressure
Power cylinder and water tank composition, control pump provides control oil to solenoid directional control valve, and connects super-pressure pressure-relief valve by solenoid directional control valve,
Super-pressure pressure-relief valve can be two-position two-way hydraulic control valve member, be mounted between pressure measuring cylinder and pressure relief pipeline, orifice union is mounted on
Before the valve of super-pressure pressure-relief valve or after valve, release speed is adjusted.Pressure release system can pass through multiple super-pressure releases
The combination of valve and different pore size orifice union forms a variety of release characteristics.Electric-control system becomes according to pressure measuring cylinder internal pressure
Change situation, require to be compared with pressure curve control, open solenoid directional control valve and open corresponding super-pressure pressure-relief valve, allows pressure
Aqueous medium in cylinder is discharged by super-pressure pressure-relief valve in water tank, while main pump control pump provides driving to proportional variable pump
Aqueous medium supercharging is entered pressure measuring cylinder by control oil, proportional variable pump to booster output hydraulic pressure oil, by booster reciprocating reversing,
Carry out the dynamic equilibrium compensation of pressure system.Super-pressure pressure-relief valve may be configured as it is multigroup, i.e., super-pressure pressure-relief valve be it is multiple, control
Its solenoid directional control valve opened and closed is also to match multiple, while being equipped with after super-pressure pressure-relief valve different apertures three
Series connection sizing orifice union.In the case where super-pressure pressure-relief valve is opened, mainly determined by the discharge characteristic of super-pressure pressure-relief valve
The size of pressure difference and orifice union bore before and after super-pressure pressure-relief valve.At the same pressure, super-pressure pressure-relief valve
Pressure difference is fixed before valve, after valve, and sizing orifice union aperture is bigger, and release speed is faster, otherwise release speed is slower.Therefore pass through
The unlatching quantity of electric-control system selection solenoid directional control valve and the orifice union combination of different throttle diameters can reach different releases
Characteristic.It is achieved that automatically unloading is pressurized.
Further, the booster and proportional variable pump are multigroup, and are connected in parallel on the main pump control pump and pressure measuring cylinder
Between.
Using multigroup booster and proportional variable pump, range of regulation is wider, and control accuracy is high.
Further, be also associated between the proportional variable pump and the booster the second check valve, first filter,
Electromagnetism slime flux valve and first pressure gauge.
Operation principle：
Oil circuit is provided with electromagnetic relief valve and first pressure gauge, wherein electromagnetic relief valve between proportional variable pump and booster
For maintaining working connection pressure constant, first pressure gauge is used to indicate working connection pressure.Second check valve for hydraulic oil from than
Example variable pump flow to booster and cannot adverse current, first filter be used to filter control it is oily in impurity, make purified hydraulic pressure
Oil enters the low-pressure end of booster.
Further, the second shut-off valve, fluid infusion pump, non-return are also connected between the water tank and the booster in turn
Valve, the second filter and third pressure gauge.
Operation principle：
Fluid infusion pump from water tank extracting aqueous medium by check-valves, third pressure gauge, the second shut-off valve and the second filter into
Enter the booster cavity of booster, main pump control pump provides control oil, driving proportional variable pump output hydraulic pressure oil, liquid to proportional variable pump
Pressure oil enters the low-pressure end of booster by the second check valve, first filter, passes through booster reversal valve switching right and left chamber oil
Road realizes that booster is back and forth pressurized, while the aqueous medium supercharging in booster cavity being entered in pressure measuring cylinder.
Further, the first shut-off valve and accumulator, institute are also associated between the control pump and the solenoid directional control valve
It states the first shut-off valve and is also associated with control pump loop pressure gauge, the control pump loop pressure gauge is connect with solenoid directional control valve.
Operation principle：
First shut-off valve is turned on and off by electric control system controls, controls oil circuit.Control pump loop pressure gauge-is for detecting
The pressure on pump loop is controlled, accumulator is constant for maintaining control oil circuit pressure.
Further, it is also associated with control pump loop check valve and overflow valve between the control pump and solenoid directional control valve,
It is also associated with first pressure sensor between the control pump loop check valve and overflow valve.
Operation principle：
The control pump loop check valve-that control pump is connected to by transfer conduit provides control oil, control to solenoid directional control valve
Bypass is connected with overflow valve and first pressure sensor, first pressure sensor between pump loop check valve-and solenoid directional control valve
For detecting pressure, overflow valve plays level pressure overflow, voltage stabilizing, system unloaded and safeguard protection, maintains control oil circuit pressure permanent
It is fixed.
Further, the main pump control pump is also connected with main pump control pump loop check valve, main pump control blowback in turn
Pipe filter and main pump control pump loop electromagnetism slime flux valve, the main pump control pump loop electromagnetism slime flux valve and the electromagnetic switch
Valve connects, and the main pump control pump loop electromagnetism slime flux valve is parallel with main pump control pump loop pressure gauge.
Operation principle：
Main pump control pump control hydraulic oil controls pump loop check valve by main pump, main pump controls blowback pipe filter-and
Main pump controls pump loop electromagnetism slime flux valve-and enters solenoid directional control valve afterwards, and controls pump loop pressure gauge measure loop pressure by main pump
Power.
Further, second pressure sensor and second pressure gauge and superelevation are also associated between the pressure measuring cylinder and water tank
Press Manual pressure relief valve.
Pressure measuring cylinder is connected with second pressure sensor and second pressure gauge, is respectively used to the pressure of detection being sent to automatically controlled
The pressure of system and display pressure measuring cylinder, electric control system is according to the pressure change in pressure measuring cylinder, dynamic regulation proportional variable pump
Flow, change the flow of driving booster, to dynamic regulation pumping rate.
The utility model compared with prior art, has the following advantages and advantageous effect：
The utility model can dynamic step-less adjustment rate variable pump output flow, indirectly change booster supercharging speed
Degree realizes the pumping rate of dynamic step-less adjustment, reaches the step-less adjustment for being filled with super-pressure medium to pressure measuring cylinder；Pass through automatically controlled system
The unlatching quantity of system selection solenoid directional control valve and the orifice union combination of different throttle diameters can reach different release characteristics；It is real
Automatic-boosting release is showed.
Description of the drawings
Fig. 1 is the principles of the present invention figure；
Wherein 1- control pumps；2-1- controls pump loop check valve；2-2- main pumps control pump loop check valve；3- first pressures
Table；3-1- controls pump loop pressure gauge；3-2- main pumps control pump loop pressure gauge；The first shut-off valves of 4-；5- first pressures sense
Device；6- accumulators；7- main pumps control pump；8- first filters；8-1- main pumps control blowback pipe filter；9- electromagnetic relief valves；
9-1- main pumps control pump loop electromagnetic relief valve；10- overflow valves；11- solenoid directional control valves；12- super-pressure pressure-relief valves；13- explosions
Valve；14- pressure measuring cylinders；15- second pressure gauges；16- second pressure sensors；17- super-high pressure hand relief valves；18- rate variables
Pump；The second check valves of 19-；20- boosters；21- fluid infusion pumps；The second shut-off valves of 22-；23- check-valves；24- third pressure gauges；
The second filters of 25-；26- electric-control systems.
Specific implementation mode
The utility model is described in further detail with reference to embodiment, but the embodiment of the utility model is not
It is limited to this.
Embodiment 1：
In conjunction with shown in attached drawing 1, a kind of ratio for deep sea pressure simulation test is pressurized depressurized system, including electric-control system
The ratio pressure charging system and pressure release system being connect with electric-control system, the ratio pressure charging system include main pump control pump 7,
The main pump control pump 7 is connected with proportional variable pump 18, and the proportional variable pump 18 is connected with booster 20, the booster 20
It is connected with pressure measuring cylinder 14, the pressure measuring cylinder 14 is connected with water tank, the piping connection of water tank and the booster 20；The pressure is released
Place system includes control pump 1, and the control pump 1 is connected with solenoid directional control valve 11, and the solenoid directional control valve 11 is connected with super-pressure
Pressure-relief valve 12, the super-pressure pressure-relief valve 12 are also connect with the pressure measuring cylinder 14 and water tank.
Operation principle：
Ratio supercharging depressurized system is made of proportional variable pump 18, booster 20, pressure measuring cylinder 14 and water tank and pipeline.Than
Example supercharging flow is as follows：Aqueous medium in water tank enters the Zeng Yaqiang of booster 20, and main pump control pump 7 is carried to proportional variable pump 18
For control oil, driving proportional variable pump 18 output hydraulic pressure oil, hydraulic oil enters the low-pressure end of booster 20, is changed by booster 20
It to Vavle switching or so chamber oil circuit, realizes that booster 20 is back and forth pressurized, while the aqueous medium supercharging in booster cavity is entered into pressure measuring cylinder
In 14.According to pascal's principle, pressure ratio is equal to the ratio between the cross-sectional area of the cross-sectional area and high-pressure plunger of low-pressure piston.Ratio
There are certain proportionate relationships with 20 output flow of booster for 18 output flow of variable pump, i.e., the pressure ratio with booster 20 is at anti-
Than.Can 18 output flow of dynamic step-less adjustment proportional variable pump, indirectly change booster 20 pumping rate, realize dynamic nothing
The pumping rate that grade is adjusted, reaches the step-less adjustment that super-pressure medium is filled with to pressure measuring cylinder 14.Pressure release system is mainly by controlling
System pump 1, solenoid directional control valve 11, super-pressure pressure-relief valve 12, pressure measuring cylinder 14 and water tank composition, control pump 1 are carried to solenoid directional control valve 11
Super-pressure pressure-relief valve 12 is connected for control oil, and by solenoid directional control valve 11, super-pressure pressure-relief valve 12 can be bi-bit bi-pass liquid
Valve member to be controlled, is mounted between pressure measuring cylinder 14 and pressure relief pipeline, orifice union is mounted on before the valve of super-pressure pressure-relief valve 12 or after valve,
Release speed is adjusted.Pressure release system can pass through the group of multiple super-pressure pressure-relief valves 12 and different pore size orifice union
Conjunction mode forms a variety of release characteristics.Electric-control system 26 is controlled according to 14 internal pressure situation of change of pressure measuring cylinder with pressure curve
It is required that being compared, open solenoid directional control valve 11 and open corresponding super-pressure pressure-relief valve 12, the aqueous medium in pressure measuring cylinder 14 is allowed to pass through
It crosses super-pressure pressure-relief valve 12 to discharge into water tank, while main pump control pump 7 provides drive control oil to proportional variable pump 18, than
Aqueous medium supercharging is entered pressure measuring cylinder 14 by example variable pump 18 to booster output hydraulic pressure oil, by 20 reciprocating reversing of booster, into
The dynamic equilibrium of row pressure system compensates.Super-pressure pressure-relief valve 12 may be configured as it is multigroup, i.e., super-pressure pressure-relief valve 12 be it is multiple, control
The solenoid directional control valve 11 for making its keying is also multiple to match, while different apertures is equipped with after super-pressure pressure-relief valve 12
Three series connection sizing orifice unions.In the case where super-pressure pressure-relief valve 12 is opened, pass through the flow of super-pressure pressure-relief valve 12
Characteristic depends mainly on the size of the pressure difference and orifice union bore before and after super-pressure pressure-relief valve 12.At the same pressure, surpass
Pressure difference is fixed before the valve of high pressure relief valve 12, after valve, and sizing orifice union aperture is bigger, and release speed is faster, otherwise release speed
Degree is slower.Therefore the orifice union group of the unlatching quantity and different throttle diameters of solenoid directional control valve 11 is selected by electric-control system 26
Conjunction can reach different release characteristics.
Embodiment 2：
On the basis of embodiment 1, in conjunction with shown in attached drawing 1, the booster 20 and proportional variable pump 18 are multigroup, and simultaneously
It is associated between the main pump control pump 7 and pressure measuring cylinder 14.
Using multigroup booster 20 and proportional variable pump 18, range of regulation is wider, and control accuracy is high.
Further, the second check valve 19, first is also associated between the proportional variable pump 18 and the booster 20
Filter 8, electromagnetism slime flux valve 9 and first pressure gauge 3.
Operation principle：
Oil circuit is provided with electromagnetic relief valve 9 and first pressure gauge 3, wherein electromagnetism between proportional variable pump 18 and booster 20
For overflow valve 9 for maintaining working connection pressure constant, first pressure gauge 3 is used to indicate working connection pressure.Second check valve 19 is used for
Hydraulic oil from proportional variable pump 18 flow to booster 20 and cannot adverse current, first filter 8 be used to filter control it is oily in impurity,
Purified hydraulic oil is set to enter the low-pressure end of booster 20.
Further, be also connected in turn between the water tank and the booster 20 second shut-off valve 22, fluid infusion pump 21,
Check-valves 23, the second filter 25 and third pressure gauge 24.
Operation principle：
Fluid infusion pump 21 passes through check-valves 23, third pressure gauge 24, the second shut-off valve 22 and second from water tank extracting aqueous medium
Filter 25 enters the booster cavity of booster 20, and main pump control pump 7 provides control oil to proportional variable pump 18, drives rate variable
18 output hydraulic pressures oil is pumped, hydraulic oil is entered the low-pressure end of booster 20 by the second check valve 19, first filter 8, passes through increasing
20 reversal valve switching right and left chamber oil circuit of depressor, realize booster 20 back and forth be pressurized, while by the aqueous medium in booster cavity be pressurized into
Enter in pressure measuring cylinder 14.
Embodiment 3：
On the basis of embodiment 2, in conjunction with shown in attached drawing 1, also connect between the control pump 1 and the solenoid directional control valve 11
It is connected to the first shut-off valve 4 and accumulator 6, first shut-off valve 4 is also associated with control pump loop pressure gauge 3-1, the control
Pump loop pressure gauge 3-1 is connect with solenoid directional control valve 11.
Operation principle：
First shut-off valve 4 is turned on and off by the control of electric-control system 26, controls oil circuit.Pump loop pressure gauge 3-1 is controlled to use
Pressure on detection control pump loop, accumulator 6 are constant for maintaining control oil circuit pressure.
Further, it is also associated with control pump loop check valve 2-1 between the control pump 1 and solenoid directional control valve 11 and overflows
Valve 10 is flowed, first pressure sensor 5 is also associated between the control pump loop check valve 2-1 and overflow valve 10.
Operation principle：
The control pump loop check valve 2-1 that control pump 1 is connected to by transfer conduit provides control oil to solenoid directional control valve 11,
It is bypassed between control pump loop check valve 2-1 and solenoid directional control valve 11 and is connected with overflow valve 10 and first pressure sensor 5, first
Pressure sensor 5 plays level pressure overflow, voltage stabilizing, system unloaded and safeguard protection effect, dimension for detecting pressure, overflow valve 10
It is constant to hold control oil circuit pressure.
Embodiment 4：
On the basis of embodiment 3, in conjunction with shown in attached drawing 1, the main pump control pump 7 is also connected with main pump control pump in turn
Circuit check valve 2-2, main pump control blowback pipe filter 8-1 and main pump control pump loop electromagnetism slime flux valve 9-1, the main pump control
Pump loop electromagnetism slime flux valve 9-1 processed is connect with the solenoid directional control valve 11, and the main pump control pump loop electromagnetism slime flux valve 9-1 is simultaneously
It is associated with main pump control pump loop pressure gauge 3-2.
Operation principle：
7 control hydraulic oil of main pump control pump controls pump loop check valve 2-2 by main pump, main pump controls blowback pipe filter
Enter solenoid directional control valve 11 after 8-1 and main pump control pump loop electromagnetism slime flux valve 9-1, and by main pump control pump loop pressure gauge 3-
2 measure loop pressure.
Further, second pressure sensor 15 and second pressure gauge 16 are also associated between the pressure measuring cylinder 14 and water tank
With super-high pressure hand relief valve 17.
Pressure measuring cylinder 14 is connected with second pressure sensor 15 and second pressure gauge 16, is respectively used to the pressure that will be detected transmission
To the pressure of electric-control system 26 and display pressure measuring cylinder 14, electric control system is adjusted according to the pressure change in pressure measuring cylinder 14, dynamic
The flow of proportional variable pump 18 is saved, the flow of driving booster 20 is changed, to dynamic regulation pumping rate.
The above is only the preferred embodiment of the utility model, not does limit in any form to the utility model
System, any simple modification made by the above technical examples according to the technical essence of the present invention, equivalent variations, each falls within
Within the scope of protection of the utility model.
Claims (8)
1. a kind of ratio for deep sea pressure simulation test is pressurized depressurized system, including electric-control system and it is connect with electric-control system
Ratio pressure charging system and pressure release system, which is characterized in that the ratio pressure charging system include main pump control pump（7）, institute
State main pump control pump（7）It is connected with proportional variable pump（18）, the proportional variable pump（18）It is connected with booster（20）, the increasing
Depressor（20）It is connected with pressure measuring cylinder（14）, the pressure measuring cylinder（14）It is connected with water tank, water tank and the booster（20）Pipeline
Connection；The pressure release system includes that control pumps（1）, the control pump（1）It is connected with solenoid directional control valve（11）, the electromagnetism
Reversal valve（11）It is connected with super-pressure pressure-relief valve（12）, the super-pressure pressure-relief valve（12）Also with the pressure measuring cylinder（14）And water tank
Connection.
2. a kind of ratio for deep sea pressure simulation test according to claim 1 is pressurized depressurized system, feature exists
In the booster（20）And proportional variable pump（18）To be multigroup, and it is connected in parallel on the main pump control pump（7）With pressure measuring cylinder（14）
Between.
3. a kind of ratio for deep sea pressure simulation test according to claim 2 is pressurized depressurized system, feature exists
In the proportional variable pump（18）With the booster（20）Between be also associated with the second check valve（19）, first filter
（8）, electromagnetism slime flux valve（9）And first pressure gauge（3）.
4. a kind of ratio for deep sea pressure simulation test according to claim 3 is pressurized depressurized system, feature exists
In the water tank and the booster（20）Between be also connected with the second shut-off valve in turn（22）, fluid infusion pump（21）, check-valves
（23）, the second filter（25）With third pressure gauge（24）.
5. a kind of ratio for deep sea pressure simulation test according to claim 4 is pressurized depressurized system, feature exists
In the control pump（1）With the solenoid directional control valve（11）Between be also associated with the first shut-off valve（4）And accumulator（6）, described
First shut-off valve（4）It is also associated with control pump loop pressure gauge（3-1）, the control pump loop pressure gauge（3-1）It is changed with electromagnetism
To valve（11）Connection.
6. a kind of ratio for deep sea pressure simulation test according to claim 5 is pressurized depressurized system, feature exists
In the control pump（1）With solenoid directional control valve（11）Between be also associated with control pump loop check valve（2-1）And overflow valve
（10）, the control pump loop check valve（2-1）And overflow valve（10）Between be also associated with first pressure sensor（5）.
7. a kind of ratio for deep sea pressure simulation test according to claim 6 is pressurized depressurized system, feature exists
In the main pump control pump（7）Also it is connected with main pump control pump loop check valve in turn（2-2）, main pump control pump loop filtering
Device（8-1）Pump loop electromagnetism slime flux valve is controlled with main pump（9-1）, the main pump control pump loop electromagnetism slime flux valve（9-1）With institute
State solenoid directional control valve（11）Connection, the main pump control pump loop electromagnetism slime flux valve（9-1）It is parallel with main pump control pump loop pressure
Power table（3-2）.
8. a kind of ratio supercharging release system for deep sea pressure simulation test according to any one of claims 1-7
System, which is characterized in that the pressure measuring cylinder（14）Second pressure sensor is also associated between water tank（15）And second pressure gauge
（16）And super-high pressure hand relief valve（17）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721772459.9U CN207762032U (en) | 2017-12-18 | 2017-12-18 | A kind of ratio for deep sea pressure simulation test is pressurized depressurized system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721772459.9U CN207762032U (en) | 2017-12-18 | 2017-12-18 | A kind of ratio for deep sea pressure simulation test is pressurized depressurized system |
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| Publication Number | Publication Date |
|---|---|
| CN207762032U true CN207762032U (en) | 2018-08-24 |
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ID=63187010
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109738218A (en) * | 2018-12-28 | 2019-05-10 | 宝鸡石油机械有限责任公司 | A kind of external pressure Work condition analogue experimental rig of drilling and extracting equipment |
-
2017
- 2017-12-18 CN CN201721772459.9U patent/CN207762032U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109738218A (en) * | 2018-12-28 | 2019-05-10 | 宝鸡石油机械有限责任公司 | A kind of external pressure Work condition analogue experimental rig of drilling and extracting equipment |
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