CN1009301B - Pressure reducing valve with pressure automatic setting - Google Patents
Pressure reducing valve with pressure automatic settingInfo
- Publication number
- CN1009301B CN1009301B CN 85105826 CN85105826A CN1009301B CN 1009301 B CN1009301 B CN 1009301B CN 85105826 CN85105826 CN 85105826 CN 85105826 A CN85105826 A CN 85105826A CN 1009301 B CN1009301 B CN 1009301B
- Authority
- CN
- China
- Prior art keywords
- pressure
- valve
- actuator
- difference
- diaphragm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/001—Pipes; Pipe joints
- B29D23/003—Pipe joints, e.g. straight joints
- B29D23/005—Pipe joints, e.g. straight joints provided with electrical wiring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
- B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/3468—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the means for supplying heat to said heated elements which remain in the join, e.g. special electrical connectors of windings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/52—Joining tubular articles, bars or profiled elements
- B29C66/522—Joining tubular articles
- B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/52—Joining tubular articles, bars or profiled elements
- B29C66/522—Joining tubular articles
- B29C66/5229—Joining tubular articles involving the use of a socket
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/02—Welded joints; Adhesive joints
- F16L47/03—Welded joints with an electrical resistance incorporated in the joint
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/20—Control of fluid pressure characterised by the use of electric means
- G05D16/2086—Control of fluid pressure characterised by the use of electric means without direct action of electric energy on the controlling means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
- B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one axis
- B29C66/83221—Joining or pressing tools reciprocating along one axis cooperating reciprocating tools, each tool reciprocating along one axis
Abstract
The present invention relates to a pressure reducing valve capable of automatically regulating pressure, which comprises a diaphragm and a pressure setting spring, a device for regulating the elasticity of the spring, and an actuator for controlling a setting device. The actuator can be in operation when the difference value of the secondary side fluid pressure of the valve and the target value of setting pressure is larger than a reference difference value; the operation of the actuator can be stopped when the measured difference value is zero essentially.
Description
The present invention relates to a kind of valve that is used for adjusting hydrodynamic pressure.Relate in particular to a kind of reduction valve, the hydrodynamic pressure that is used for lowering its first side is a definite value with the pressure of keeping its second side.
Reduction valve has two class patterns usually: a class is that a main valve is arranged, and directly controls it by the displacement of a diaphragm; Another kind of is that for example piston valve of a main valve is arranged, and is directly controlled by a pilot valve.The fluid secondary pressure acts on diaphragm one side, and the resilient force of a pressure setting spring is in its opposite side.If this two power irrelevancy weighing apparatus, then diaphragm moves and impels a spool to move control flows to keep a secondary fluid pressure suitable with the elastic force of spring through the Fluid Volume of valve.
The adjustment screw that is threaded with valve body is used for setting up needed a secondary fluid pressure.This spiral shell screw is to indicate needed pressure with the elastic force that hand rotates to adjust the pressure setting spring until pressure meter.When set pressure will often change, the very inconvenience of this device.This device is not also allowed any remotely-controlled operation or control automatically.
Therefore, known have a kind of autocontrol valve.According to the working principle of autocontrol valve, controlled value is determined and compare with a desired value, is processed into a signal to control a valve core actuator, for example electric motor or fluid actuator according to resulting judgement of any difference therebetween or instruction.
If it is a kind of reduction valve, then secondary pressure is predicted by a pressure transducer and compares with a desired value of importing via a setting mechanism, result relatively is processed into a signal, this signal is with proportional control is handled or differential/integral control is handled so that actuators such as electric motor are done, therefore, this valve is convenient to realize the variation of any desired value, and allows remotely-controlled operation or control automatically.
Yet autocontrol valve costs an arm and a leg.This be because want directly, trace and activate spool rapidly, need have the actuator of high output and be used for the controller of the complex process of signal.
Autocontrol valve is replied than the reduction valve with diaphragm to slow.This is because actuator is not directly connected in signal processor.
The purpose of this invention is to provide a kind of reduction valve, this valve comprises the actuator with little output, but this valve is convenient to carry out any change of pressure setting and is allowed remotely-controlled operation and control automatically.
According to the present invention, above-mentioned purpose is reached by following reduction valve:
(a) comprise a diaphragm, the pressure setting spring device of an adjustment spring power; Another actuator in order to the control setting device.
Just make actuator action when (b) difference between the desired value of the second side hydrodynamic pressure of the valve that records and set pressure is greater than reference difference; And when the difference that records is essentially zero, just make actuator stop action.
The mode of operation of this valve below is described.
Set up device with one and set up needed pressure.With the continuous or periodic mensuration a secondary fluid of pressure transducer pressure.Difference between a secondary fluid pressure and goal pressure determined and by comparison controller with reference difference relatively.If measure difference greater than reference difference, then a signal is reached driver in order to operate actuator, make measure difference in fact can vanishing.
Actuator is operated so that rotate elastic force setting device (for example known adjustment screw) and the elastic force of adjustment pressure setting spring along either direction by driver.The diaphragm displacement priming spool that is produced is to increase or to reduce the fluid flow through valve, and nationality is to increase or to reduce a secondary fluid pressure.
A secondary fluid pressure is predicted and is sent to comparison controller by pressure transducer.When measuring difference in fact during vanishing, transmit a stop signal to driver so that the actuator shut-down operation.
The decompressor manner of execution that comprises diaphragm is as known techniques, so long as a secondary fluid pressure, power actuator in the reference difference scope is not promptly had an effect, and reduces but the machinery action of diaphragm can obtain hydrodynamic pressure.If it departs from out reference difference, then actuator action is to adjust the elastic force of pressure setting spring, as above-mentioned.
Therefore, according to the present invention, set pressure is easy to change; And, then not only can reach remotely-controlled operation, and can control automatically if controlled amount is detected and imports as a desired value.
It is promptly enough that use has the actuator of little output, because it only is used for control spring elastic force regulating device, but not is used for finishing any quick priming of spool.
As known person, spool is to the machinery action rapid answer of diaphragm.
The present invention produces a lot of special effects, after this will be set forth in.
Only when the difference of mensuration when reference difference departs from out the actuator initiating do; And stop action in fact during vanishing measuring difference.Therefore, actuator often is not in operation or the long-time continuous operation, and be length more than any automatic brake valve the working life of this valve.
If reduction valve is for having a pattern person of the pilot valve, then in order to operate a main valve, this main valve need a big steering force operation by a little strength priming for pilot valve.Because pressure setting spring has little elastic force, so use actuator promptly enough with little output.
As long as actuator is the adjustment screw person of moving axially who is used for making spring, can easily be applied to any existing reduction valve.
If the difference between a secondary fluid pressure and set pressure surpasses reference difference, then actuator promptly moves and to change set pressure relatively large and his like physical efficiency is flow through.So when a secondary fluid pressure had any variation, the present invention's valve can be done rapider control than any reduction valve that only relies on machinery control.
Do more particularly bright below with reference to embodiment shown in Fig. 1 to the present invention.
Implement pressure reducing valve with pressure automatic setting of the present invention and comprise a mechanical type reduction valve part 1, one electric motor part, and a control section.
The structure of valve portion 1 is identical with known reduction valve.Have fluid input 2 and fluid output 3, be connected with a subchannel 4 and two subchannels 5 respectively.Valve portion 1 has primary valve 7, can be opened or be closed by main valve plug 6.Spool 6, and is connected with piston 8 by a valve rod to its close port position by a spring.
The digital fluid pressure that flow to fluid output via primary valve 7 acts on surface under the piston 8, and the hydrodynamic pressure that acts on piston 8 upper surfaces via passage 9 and 11 is by 12 controls of guide's spool.Guide's spool 12 is depressed into its closed position by a spring, and be connected with the valve rod of diaphragm 13 lower surfaces contacts, it is moved down can force guide's spool 12 to enter its enable possition.
If diaphragm 13 is moved towards the below, then guide's spool 12 be forced to downwards and allow fluid by fluid input 2 through passage 9 and 11 and flow into piston 8 upper areas, and piston 8 and main valve plug pushed away for 6 times, open primary valve 7 whereby, allow fluid to flow to fluid output 3 by fluid input 2.If diaphragm 13 is moved up, then guide's spool 12 is pushed away on the spring and is cut off passage 9 and is communicated with 11 fluid, and the fluid in piston 8 upper areas is via passage 11, gap around the valve rod of guide's spool 12, and path 10 and flow to fluid output 3, chase after whereby and make main valve plug 6 and piston 8 upwards close primary valve 7.
Borrow the passage 14 of a minor diameter and be communicated with atmosphere and remain under the constant substantially atmospheric pressure at diaphragm 13 upper areas.The underpart of pressure setting spring 16 contacts with diaphragm 13 upper surfaces, and forces in diaphragm 13 surfaces.The end is supported by a spring support on the spring 16.Adjust screw 17 lower ends and contact with spring support, feasible adjustment screw 17 all can be adjusted the decrement of spring 16 and act on elastic force on the diaphragm 13 to the rotation of either direction.Adjusting the interior inner threaded member of screw 17 and the spring housing 15 that is installed in a part that constitutes valve body is threaded.
The motor part is connected with valve portion 1 by being fixed in the yoke 18 on the spring housing 15.Output shaft 20 is with to adjust screw 17 coaxial, and its lower end is connected by the hexagon head 42 of link 19 and screw 17.
Output shaft 20 forms ball spline shaft.Gear 22 is fixed in spline 21 parts week and is held on, between the lower bearing member 23 and 24, to prevent vertical and to move radially.Bearing components 23 and 24 is held on 26 of mounting plate 25 and base plates.Electric motor 29 and retarder 28 are fixed on the mounting plate 25, its output shaft 27 and gear 22 engagements.
If motor 29 is driven, then the output shaft 27 of retarder 28 is rotated and rotates week outside the splined shaft 21 via gear 22.Look its sense of rotation, output shaft 20 is rotated up or down, by connector element 19 adjustment screw 17 is rotated along either direction.
Output shaft 20 is provided with disk 35, when adjusting screw 17 and be moved to its highest or extreme lower position, can measure it.A pair of position transducer 33 and 34 is located at one of disk 35 side and is measured it with the highest and its lowest position at screw respectively. Sensor 33 and 34 is fixed on the sidewall of motor 29 and retarder 28 respectively.
Survey the photoreceptor that sensor 33 and 34 is preferably reflection type, also can use the sensor of any other pattern certainly, as potentiometer, limit switch or magnetometric sensor.
Driver 30 is located at motor 29 next doors.The motor part branch is contained in the valve jacket 36, and latter's protection prevents that it is subjected to dust, the evil of aqueous vapor.The motor part also comprises the distribution and the terminal (but not shown) of necessity.
Control section comprises position transducer 33 and 34, comparison controller 31, and goal pressure is set up device 32, and pressure transducer 40, and this pressure transducer 40 is located in a secondary fluid passage.Signaling line 37 and 38 extends to comparison controller 31 by position transducer 33 and 34 respectively.Signaling line 39 extends to comparison sensor 31 by pressure transducer 40.Also have signaling line to extend to comparison controller 31 by setting device 32, signaling line extends to driver 30 by comparison controller 31.Comparison controller 31 also can be located at driver 30 places.
One goal pressure is set up and is imported in the comparison controller 31 by setting up device 32.Hydrodynamic pressure in two subchannels 5 is detected and is inputed in the comparison controller 31 continuously or in short time by pressure transducer 40.Comparison controller 31 calculates interior the hydrodynamic pressure of two subchannels 5 that recorded by sensor 40 and the difference of goal pressure, and with it and reference difference comparison.
If this relatively indicates the mensuration difference and reference difference has deviation, then comparison controller 31 transmits a control signal and gives driver 30 so that make the mensuration difference become zero in fact, even two subchannels, 5 interior hydrodynamic pressures equal goal pressure in fact.Motor 29 drives the fluid flow that flows through valve with adjustment by driver 30.Become zero in fact if measure difference, then sent a control signal and give driver 30 to stop the operation of motor 29 by comparison controller 31; And the said determination difference becomes zero in fact and that is to say that this difference is in the very little reference difference scope and is little more than the said reference difference.
Position transducer 33 and 34 and disk 35 collaborative detecting it in the highest and its lowest position of adjusting screw 17 respectively, and respective signal is reached comparison controller 31.Comparison controller 31 is replied any other control signal of comparison for rapidly to this two signal, and transmit a signal to driver so that the running of motor 29 stop.Can prevent that so any improper power from putting on the control system of adjusting screw 17.
Being simply described as follows of accompanying drawing:
Fig. 1 is the sectional arrangement drawing of the electric operation reduction valve one of according to the present invention, and its control device is represented with Block Diagram.
1 ... mechanical type reduction valve part
5 ... two subchannels
6 ... main valve plug
8 ... piston
12 ... guide's spool
13 ... diaphragm
15 ... spring housing
16 ... pressure setting spring
17 ... adjust screw
20 ... output shaft
21 ... ball spline shaft
27 ... reducer output shaft
29 ... electric motor
30 ... driver
31 ... comparison controller
32 ... goal pressure is set up device
33 ... detecting extreme higher position position transducer
34 ... detecting extreme lower position position transducer
35 ... disk
40 ... pressure transducer.
Claims (1)
1, a kind of reduction valve of automatic adjustment pressure comprises
1) pressure control valve portion,
2) pressure setting part that separates by diaphragm and this pressure control valve portion, it has a pressure setting spring device, determine the working pressure of this valve with the diaphragm cooperating, also has a set pressure controlling device, it is adjusted screw and sets up the pressure of spring action on diaphragm in order to regulate
3) actuator that activates this set pressure controlling device,
4) one has drive unit so that drive the control gear of actuator,
It is characterized in that
5) above-mentioned actuator includes a shaft device, and its bottom is connected with the adjustment screw, and its periphery has the gear parts that is meshed with drive unit, and a reflection also is housed on it, and it moves up and down the member of position,
6) above-mentioned control gear has position sensing device, with the mobile position of sensitive axis, and can handle the running of ending drive unit, limiting this moving between two limit positions,
7) above-mentioned control gear comprises the device of setting up the set pressure desired value, and the device that senses the difference between above-mentioned desired value and the valve outlet port side pressure,
8) when the difference between above-mentioned valve outlet port side liquid pressure that records and the set pressure desired value during, just make above-mentioned actuator action, and actuator is quit work when zero when the difference that records is actually greater than reference difference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85105826 CN1009301B (en) | 1985-08-01 | 1985-08-01 | Pressure reducing valve with pressure automatic setting |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59-207779 | 1984-10-02 | ||
| CN 85105826 CN1009301B (en) | 1985-08-01 | 1985-08-01 | Pressure reducing valve with pressure automatic setting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85105826A CN85105826A (en) | 1986-03-10 |
| CN1009301B true CN1009301B (en) | 1990-08-22 |
Family
ID=4794729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85105826 Expired CN1009301B (en) | 1985-08-01 | 1985-08-01 | Pressure reducing valve with pressure automatic setting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1009301B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9337501B2 (en) * | 2003-07-29 | 2016-05-10 | Intelligent Energy Limited | Hydrogen-generating fuel cell cartridges |
| US20090277519A1 (en) * | 2008-05-06 | 2009-11-12 | Hr Textron, Inc. | Method and apparatus for controlling fluid flow rate characteristics of a valve assembly |
| CN105889589A (en) * | 2014-10-16 | 2016-08-24 | 河南航天液压气动技术有限公司 | Electronic control pilot-operated type high-precision large-flow regulating valve |
| CN105090574B (en) * | 2015-08-21 | 2018-02-23 | 湖北三江航天红峰控制有限公司 | A kind of pressure-sensitive switch for being adapted to high-temperature gas |
| CN105972224B (en) * | 2016-05-18 | 2018-02-27 | 佛山市盈向精密机械科技有限公司 | A kind of Novel electric for die casting machine adjusts valve |
| IT201600079425A1 (en) * | 2016-07-28 | 2018-01-28 | Pietro Fiorentini Spa | CALIBRATION DEVICE FOR A GAS PRESSURE REGULATOR, IN PARTICULAR FOR A PILOT, AND A PRESSURE ADJUSTMENT SYSTEM FOR A GAS INCLUDING SUCH A CALIBRATION DEVICE |
| CN109296790B (en) * | 2018-12-03 | 2019-09-24 | 湖南文理学院 | A kind of pressure release control and regulation valve convenient for adjusting pressure boundary |
| CN109798395A (en) * | 2018-12-28 | 2019-05-24 | 无锡威孚施密特动力***零部件有限公司 | A kind of pressure regulator valve production technology |
| CN110145621A (en) * | 2019-05-08 | 2019-08-20 | 承德高中压阀门管件集团有限公司 | A kind of pilot operated safety valve |
| CN111022736B (en) * | 2019-12-20 | 2022-04-22 | 广州朗达电子设备有限公司 | Evaporating pressure regulating valve capable of electrically regulating pressure |
-
1985
- 1985-08-01 CN CN 85105826 patent/CN1009301B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85105826A (en) | 1986-03-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |