CN206299852U - A kind of verifying attachment of pilot operated safety valve and pilot operated safety valve - Google Patents
A kind of verifying attachment of pilot operated safety valve and pilot operated safety valve Download PDFInfo
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- CN206299852U CN206299852U CN201621246466.0U CN201621246466U CN206299852U CN 206299852 U CN206299852 U CN 206299852U CN 201621246466 U CN201621246466 U CN 201621246466U CN 206299852 U CN206299852 U CN 206299852U
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- Prior art keywords
- safety valve
- pilot operated
- operated safety
- pressure
- elastic component
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Abstract
The utility model discloses a kind of pilot operated safety valve and the verifying attachment of pilot operated safety valve, one of which pilot operated safety valve, including pilot valve, pilot valve are provided with regulating bolt and elastic component, regulating bolt bottom is connected to elastic component, and regulating bolt is provided with the through hole for being passed through by pressure tester.In the utility model, regulating bolt and elastic component are installed on pilot valve, and the bottom of regulating bolt is connected to elastic component, and the through hole that regulating bolt is opened up can make one end that the pressure tester in the external world exposes to pilot valve from regulating bolt pass through and act on elastic component.So as to pressure tester can directly measure the torque of elastic component, to adjust the set-pressure of pilot operated safety valve.That is to say, pilot operated safety valve can realize online pressure measurement without carrying out pressure measurement after dismounting down from production line again, and whole process is convenient and swift, and safe and efficient.
Description
Technical field
The utility model is related to the technical field of pilot operated safety valve, in particular to a kind of pilot operated safety valve and
The verifying attachment of pilot operated safety valve.
Background technology
Pilot operated safety valve has the excellent architectural characteristics, many lifes such as the big, energy-conserving and environment-protective of small volume, high pressure, discharge capacity
The device for producing the device particularly Special Medium such as natural gas all uses pilot operated safety valve as safety relief valve.In practical application
In, the difference of difference and use requirement according to medium is and different, it is necessary to set different set-pressures to pilot operated safety valve
Pilot operated safety valve set-pressure need pilot operated safety valve dismounting under after, voltage supply is carried out to pilot operated safety valve, and
The blowing pressure according to voltage supply device can just measure the set-pressure of pilot operated safety valve, the comparatively laborious inconvenience of whole process, and
And the set-pressure of the pilot operated safety valve for measuring is also not accurate enough.
Utility model content
In view of this, the verifying attachment of a kind of pilot operated safety valve of the present utility model and pilot operated safety valve, is to carry
The convenience of the set-pressure in X -ray inspection X pilot operated safety valve high.
A kind of pilot operated safety valve, including pilot valve, the pilot valve are provided with regulating bolt and elastic component, the regulating bolt
Bottom is connected to elastic component, and the regulating bolt is provided with the through hole for being passed through by pressure tester.
The verifying attachment of pilot operated safety valve, the on-line testing work that it is used for pilot operated safety valve, with pressure of adjusting
Power, it is applied to a kind of above-mentioned pilot operated safety valve, including is used to spring spindle through the through hole, is used to gather described
The pressure detecting part of spring spindle pressure, one end of the spring spindle abuts the elastic component, the spring spindle it is another
One end abuts the pressure detecting part.
Further, also including being used to drive the pressure detecting part motion to adjust the spring spindle with the bullet
Property part abut elasticity power unit.
Further, also including the pressure data control power list to be gathered according to the pressure detecting part
The processing module of unit.
Further, the spring spindle is provided with the spacing ring for being limited in through hole.
Further, one end that the spring spindle abuts the spring part is semiglobe.
Further, one end that the spring spindle abuts the spring part is steel ball structure.
Further, the power unit is machine power unit, and the machine power unit includes motor, reductor
Structure, trapezoidal screw, reducing gear described in the motor connection, the reducing gear connect the trapezoidal screw.
Further, the pressure detecting part is weighing sensor.
Further, also including voice module, the processing module sends speech data to the voice module.
A kind of pilot operated safety valve of the present utility model, including pilot valve, pilot valve are provided with regulating bolt and elastic component, regulation
Stud base is connected to elastic component, and regulating bolt is provided with the through hole for being passed through by pressure tester.In the utility model, regulation
Bolt and elastic component are installed on pilot valve, and the bottom of regulating bolt is connected to elastic component, and the through hole that regulating bolt is opened up can make
One end that extraneous pressure tester exposes to pilot valve from regulating bolt passes through and acts on elastic component.So as to pressure tester can
Directly to measure the torque of elastic component, to adjust the set-pressure of pilot operated safety valve.That is to say, pilot operated safety valve is without again
Pressure measurement is carried out after under being dismantled from production line, and online pressure measurement can be realized, whole process is convenient and swift, and safe and efficient.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme of the utility model embodiment, below will be to be used needed for embodiment
Accompanying drawing be briefly described, it will be appreciated that the following drawings illustrate only some embodiments of the present utility model, therefore should not be by
Regard the restriction to scope as, for those of ordinary skill in the art, on the premise of not paying creative work, may be used also
Other related accompanying drawings are obtained with according to these accompanying drawings.
Fig. 1 shows the structural representation of the verifying attachment of the pilot operated safety valve that the embodiment of the utility model one is provided
Figure.
Fig. 2 shows the profile of the regulating bolt of the pilot operated safety valve that the embodiment of the utility model one is provided.
Main element symbol description：
1- pilot valves；2- elastic components；3- regulating bolts；4- through holes；5- spring spindles；6- pressure detecting parts；7- power lists
Unit；8- processing modules；9- spacing rings；10- voice modules；71- motors；72- reducing gears；73- trapezoidal screws.
Specific embodiment
For the ease of understanding the utility model, a kind of pilot operated safety valve and pilot-operated type are pacified below with reference to relevant drawings
The verifying attachment of full valve is described more fully.The inspection of a kind of pilot operated safety valve and pilot operated safety valve is given in accompanying drawing
The first-selected embodiment of experiment device.But, the verifying attachment of a kind of pilot operated safety valve and pilot operated safety valve can be with many not
With form realize, however it is not limited to embodiment described herein.On the contrary, the purpose for providing these embodiments is made to one
The disclosure for planting the verifying attachment of pilot operated safety valve and pilot operated safety valve is more thorough comprehensive.
In description of the present utility model, it is to be understood that term " longitudinal direction ", " transverse direction ", " on ", D score, " preceding ",
" afterwards ", the orientation or position relationship of the instruction such as "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outward " are based on attached
The shown orientation of figure or position relationship, are for only for ease of and describe the utility model and simplify to describe, rather than instruction or hint
Signified device or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this
The limitation of utility model.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or spy that the embodiment or example are described
Point is contained at least one embodiment of the present utility model or example.In this manual, to the schematic table of above-mentioned term
State and be not necessarily referring to identical embodiment or example.And, the specific features of description, structure, material or feature can be
Combined in an appropriate manner in one or more any embodiments or example.
In description of the present utility model, unless otherwise prescribed with restriction, it is necessary to explanation, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be mechanically connecting or electrical connection, or two companies of element internal
It is logical, can be joined directly together, it is also possible to be indirectly connected to by intermediary, for the ordinary skill in the art, can
To understand the concrete meaning of above-mentioned term as the case may be.
In one embodiment, refer to：Fig. 1, Fig. 2.
A kind of pilot operated safety valve, including pilot valve 1, the pilot valve 1 are provided with regulating bolt 3 and elastic component 2, and its feature exists
In the bottom of the regulating bolt 3 is connected to elastic component 2, and the regulating bolt 3 is provided with the through hole 4 for being passed through by pressure tester.
Above-mentioned, pilot operated safety valve is provided with pilot valve 1, pilot valve 1 and is provided with elastic component 2 and regulating bolt 3, and regulating bolt 3 is used
With 2 pressure to regulating bolt 3 of regulation elasticity, the top of regulating bolt 3 exposes to pilot valve 1, in order to rotate regulation, regulation
The bottom of bolt 3 is connected to elastic component 2, and regulating bolt 3 is provided with through hole 4, and the through hole 4 is communicated to tune by the top of regulating bolt 3
The bottom of bolt 3 is saved, i.e., external pressure tester can be connected to elastic component by the outside of pilot valve 1 through the through hole 4 of regulating bolt 3
2, so that, external pressure tester can directly measure the torque of current elastic component 2, such that it is able to calculate the pilot-operated type safety
The set-pressure of valve.
The verifying attachment of pilot operated safety valve, the on-line testing work that it is used for pilot operated safety valve, with pressure of adjusting
Power, it is applied to a kind of above-mentioned pilot operated safety valve, including is used to spring spindle 5 through the through hole 4, is used to gather institute
The pressure detecting part 6 of the pressure of spring spindle 5 is stated, one end of the spring spindle 5 abuts the elastic component 2, the spring top
The other end of bar 5 abuts the pressure detecting part 6.
It is above-mentioned, it is applied to the verifying attachment of the pilot operated safety valve of pilot operated safety valve in above-described embodiment, the pilot-operated type
Spring spindle 5 in the verifying attachment of safety valve passes through the through hole 4 in regulating bolt 3 and is connected to the elasticity of pilot operated safety valve
On part 2, elastic component 2 is measured to the active force of spring spindle 5 by being connected to the pressure detecting part 6 of the other end of spring spindle 5.
When being tested to a pilot operated safety valve using the verifying attachment of pilot operated safety valve first time, first, will
Spring spindle 5 is placed in through hole, and the displacement of spring spindle 5 is adjusted by pressure detecting part 6, and spring spindle 5 is connected into bullet
Property part 2, now spring spindle 5 and regulating bolt 3 are connected on the torque strong point of the one end of elastic component 2 simultaneously, but are now owned
The support torque of elastomer 2 is still acted in regulating bolt 3.
Then, regulating bolt 3 is unscrewed, the support torque of elastomer 2 has been transferred on spring spindle 5 naturally, and passes through bullet
The pressure detecting part of the other end of spring push rod 5 can measure the support moment values of current elastomer 2.
Subsequently, the displacement of spring spindle 5 is gradually adjusted, to reduce support torque of the spring spindle 5 to elastomer 2, works as power
Square it is small to the other end pilot valve valve rod of elastomer 2 to the support torque of elastomer 2 when, valve by interior media pressure impact and
Open, the moment values that now detection means is measured are exactly medium pressure correspondence moment values now in pilot operated safety valve.
With reference to pilot operated safety valve set-pressure value and the ratio of the value of medium pressure, you can to calculate current pilot-operated type safety
The pressure of medium in valve.On the contrary, when needing to set the value of specific medium pressure to pilot operated safety valve, with reference to pilot-operated type
The ratio of the value of safety valve set pressure value and medium pressure, you can the set-pressure value of setting is needed to calculate.Now, according to need
Behind the set-pressure value to be set regulation spring spindle 5 position, setting is needed when the measured value on pressure detecting part 6 is equal to
During set-pressure value, you can screw regulating bolt 3 and abut elastomer 2, then remove spring spindle 5, just complete to pilot-operated type
The on-line testing work of safety valve.
It should be further stated that, spring spindle 5 is through the through hole 4 in regulating bolt 3 and is connected to pilot-operated type safety
On the elastic component 2 of valve, the abutting can be bottom and the directly contact of elastic component 2 of spring spindle 5.Additionally, in order to prevent guide
There is displacement with the contact surface of spring spindle 5 in the situation that formula safety valve internally pressurizes, elastic component 2, can be in pressure detecting portion
After part 6 is measured by spring spindle 5 to the pressure that elastic component 2 applies, regulating bolt 3 is adjusted to contacting with elastic component 2
Spring spindle 5 is now packed up in position, i.e., the position that the position for being contacted with elastic component 2 with spring spindle 5 mutually balances, and only order is adjusted
Whole bolt is contacted with elastic component 2；It is of course also possible to not pack up elastic component 2, bright adjustment bolt is with spring spindle 5 on the same plane
Contacted with elastic component 2 so that, elastic component 2 be not easy in the case of pilot operated safety valve internal pressurization with adjustment bolt and/or
There is displacement on the contact surface of spring spindle 5.
Additionally, through hole 4 can be opened in the central shaft of regulating bolt 3, refer to by spring spindle in regulating bolt 3
5 through holes 4 for passing through are opened on central shaft, and through hole 4 is opened in the central shaft of regulating bolt 3, and can pass through spring spindle 5 should
Through hole 4 is simultaneously acted on when on elastic component 2, spring spindle 5 to the active force of elastic component 2 on the central shaft of elastic component 2 so that bullet
Spring push rod 5 is more uniform to the active force of elastic component 2, and pressure detecting part 6 passes through spring spindle 5 detection spring push rod, 5 pairs of bullets
The pressure of property part 2 is also more preferably accurate.
It should be further stated that, through hole 4 is the through hole being opened in regulating bolt 3, in the present embodiment, adjusts spiral shell
Bolt 3 can be first wife in pilot operated safety valve, but need to be processed and open up through hole 4.Certainly, also can be by pilot operated safety valve
Regulating bolt 3 be replaced, change model into consistent but offer the regulating bolt 3 of through hole 4.
In the present embodiment, the verifying attachment of pilot operated safety valve also include to driving pressure detection part 6 move with
The power unit 7 of the elasticity that regulation spring spindle 5 is abutted with elastic component 2.
Above-mentioned, driving pressure detection part 6 moves to adjust the elasticity that spring spindle 5 is abutted with elastic component 2, be due to
By abutting elastic component 2 with spring spindle 5, pressure detecting part 6 and spring spindle 5 are also abutting relation to pressure detecting part 6,
But in order to spring spindle 5 more securely abuts pressure detecting part 6, firm spring spindle 5 and pressure detecting part 6 can be increased
Firmware, for example, on pressure detecting part 6 set be used to install the groove of spring spindle 5, then for example, pressure detecting portion
Part 6 and spring spindle 5 are provided with screw hole, and screw is through the screw hole on pressure detecting part 6 and spring spindle 5 by spring top
Bar 5 is installed on pressure detecting part 6.And the elasticity that spring spindle 5 is abutted with elastic component 2 is adjusted, pilot-operated type peace can be adjusted
The set-pressure of full valve, spring spindle 5 is tighter to the abutting of elastic component 2, and the set-pressure of pilot operated safety valve is then bigger.
It should be further stated that, power unit 7 applies active force to pressure detecting part 6, such that it is able to adjust pressure
Power detection part 6 abuts the elasticity of elastic component 2 by spring spindle 5.
In the present embodiment, the verifying attachment of pilot operated safety valve is also included to be gathered according to pressure detecting part 6
Pressure data control power unit 7 processing module 8.
Above-mentioned, pressure detecting part 6 can gather 5 pairs of elasticity of spring spindle when elastic component 2 is abutted by spring spindle 5
The pressure of part 2, in the present embodiment, pressure detecting part 6 sends to processing module 8, processing module 8 pressure data of collection
Power unit 7 is controlled according to the pressure data from the collection of pressure detecting part 6 is received, the control of processing module 8 is dynamic
Power unit 7, refers to that the control power unit 7 of processing module 8 is moved to pressure detecting part 6, and the shifting of pressure detecting part 6
The dynamic spring spindle 5 that can adjust is to the elastic of the pressure of elastic component 2, and spring spindle 5 can be with to the elastic of the pressure of elastic component 2
Adjust pilot operated safety valve set-pressure so that processing module 8 can according to pressure detecting part 6 gather pressure data come
Adjust the set-pressure of pilot operated safety valve.
The mode of power unit 7 is controlled as processing module 8, corresponding mobile data can be sent to power unit 7, when
When the pressure data of detection part collection meets the requirements, processing module 8 sends and stops data to power unit 7.Certainly, mould is processed
The mode of the control power unit 7 of block 8 can also use other known methods.In the present embodiment, processing module 8 can be single
Piece machine.
Additionally, in the present embodiment, processing module 8 can connect external equipment, external equipment sends required spring spindle 5 pairs
The pressure data of spring part, processing module 8 receives required data, and current spring spindle 5 is entered to the pressure data of spring part
Row compares, and adjusts current spring spindle 5 to the pressure data of spring part to required pressure data by controlling power unit 7.
Certainly, external equipment can also directly transmit the set-pressure value of required pilot operated safety valve to processing module 8, processing module 8
By calculating set-pressure with spring spindle 5 to the ratio of the pressure data of spring part, required 5 pairs of bullets of spring spindle are obtained
The pressure data of spring part, pressure of the current spring spindle 5 to spring part is adjusted with post-processing module 8 by controlling power unit 7
Data are to required pressure data.
Spring spindle 5 is provided with the spacing ring 9 for being limited in through hole 4.
Above-mentioned, spring spindle 5 is provided with the spacing ring 9 for being limited in through hole 4, refers to when pilot operated safety valve works, by bullet
Spring push rod 5 abuts spring part, and directly abuts spring part without adjustment bolt.So, spring spindle 5 abuts the one of spring part
End, is provided with the spacing ring 9 for making spring spindle 5 be limited in bolt hole 4.The spacing ring 9 makes spring spindle 5 be connected to spring part
One end expose to through hole 4.
One end that spring spindle 5 abuts spring part is semiglobe.
Above-mentioned, spring part is also provided with spill stopper slot with the contact position of spring spindle 5, so in the present embodiment, bullet
One end that spring push rod 5 abuts spring part is semiglobe, and the semi-spherical portion of spring spindle 5 is limited in the spill stopper slot of spring part
It is interior, so as to further consolidate spring spindle 5 not shifted in the conflict position of spring part.
One end that spring spindle 5 abuts spring part is steel ball structure.
Above-mentioned, spring part is also provided with spill stopper slot with the contact position of spring spindle 5, so in the present embodiment, bullet
One end that spring push rod 5 abuts spring part is steel ball structure, and the steel ball portion of spring spindle 5 is limited in the spill stopper slot of spring part
It is interior, so as to further consolidate spring spindle 5 not shifted in the conflict position of spring part.
Power unit 7 is machine power unit 7, and machine power unit 7 includes motor 71, reducing gear 72, trapezoidal screw
73, the connection reducing gear 72 of motor 71, the connection trapezoidal screw 73 of reducing gear 72.
Above-mentioned, in the present embodiment, power unit 7 is machine power unit 7, and the motor 71 of machine power unit 7 is used to
There is provided kinetic energy to reducing gear 72, reducing gear 72 reaches the purpose of reduction of speed using gear drives at different levels, reducing gear 72 by
Gear pairs at different levels composition, such as drive the gear wheel just to reach the purpose of certain deceleration with little gear, then using it is multistage this
The structure of sample, it is possible to substantially reduce rotating speed.In the present embodiment, reducing gear 72 is used to reduce and the offer of motor 71 is moved
Can be slowed down.Reducing gear 72 connects trapezoidal screw 73 and provides trapezoidal screw 73 kinetic energy, the connection pressure of trapezoidal screw 73
Detection part 6, that is to say, pressure detecting part 6 in the top offset of trapezoidal screw 73, so, power unit 7 can be examined with driving pressure
Survey the motion of part 6.It should be further stated that, power unit 7 can also be hydraulic power unit, the hydraulic power unit
It can be the hydraulic power unit of prior art.
Pressure detecting part 6 is weighing sensor.
Above-mentioned, pressure detecting part 6 is weighing sensor, and weighing sensor can change quality signal or pressure signal
It is the device of measurable electric signal output.Additionally, in the present embodiment, pressure detecting part 6 can also be pressure sensor.
In the present embodiment, the verifying attachment of pilot operated safety valve also includes voice module 10, and processing module 8 sends voice
Data are to voice module 10.
Above-mentioned, voice module 10 can be loudspeaker, loudspeaker.Voice module 10 can fill the inspection of pilot operated safety valve
The state put reads in the form of speech, so as to the use state of the verifying attachment of pointing out user to take care valve.Treatment mould
Block 8 connects voice module 10, and speech data is sent to voice module 10, and voice module 10 should after receiving speech data
Speech data reads.It can be the inspection that represents pilot operated safety valve that processing module 8 is sent to the data content of voice module 10
The data of working state of device, herein can as an example such as：When the control power unit 7 of processing module 8 makes spring spindle 5 complete right
During the elastic regulation of the abutting of spring part, processing module 8 sends and represents speech data that regulation completes to voice module 10.Place
The data that reason module 8 can send the working condition of the verifying attachment to the expression pilot operated safety valve of voice module 10 also have very
Many, this is no longer going to repeat them.
In all examples being illustrated and described herein, any occurrence should be construed as merely exemplary, without
Be as limitation, therefore, other examples of exemplary embodiment can have different values.
Embodiment described above only expresses several embodiments of the present utility model, and its description is more specific and detailed,
But therefore can not be interpreted as the limitation to the utility model the scope of the claims.It should be pointed out that common for this area
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (10)
1. a kind of pilot operated safety valve, including pilot valve, the pilot valve is provided with regulating bolt and elastic component, it is characterised in that institute
State regulating bolt bottom and be connected to elastic component, the regulating bolt is provided with the through hole for being passed through by pressure tester.
2. the verifying attachment of pilot operated safety valve, the on-line testing work that it is used for pilot operated safety valve, to adjust set-pressure,
Characterized in that, a kind of pilot operated safety valve being applied to described in claim 1, including it is used to the spring top through the through hole
Bar, the pressure detecting part for being used to gather the spring spindle pressure, one end of the spring spindle abut the elastic component, institute
The other end for stating spring spindle abuts the pressure detecting part.
3. the verifying attachment of pilot operated safety valve according to claim 2, it is characterised in that also described including being used to drive
Pressure detecting part moves to adjust the power unit of the elasticity that the spring spindle is abutted with the elastic component.
4. the verifying attachment of pilot operated safety valve according to claim 3, it is characterised in that also including to according to described
The pressure data that pressure detecting part is gathered controls the processing module of the power unit.
5. the verifying attachment of pilot operated safety valve according to claim 2, it is characterised in that the spring spindle is provided with limit
Positioned at the spacing ring of through hole.
6. the verifying attachment of pilot operated safety valve according to claim 2, it is characterised in that the spring spindle abuts institute
The one end for stating spring part is semiglobe.
7. the verifying attachment of pilot operated safety valve according to claim 2, it is characterised in that the spring spindle abuts institute
The one end for stating spring part is steel ball structure.
8. the verifying attachment of pilot operated safety valve according to claim 3, it is characterised in that the power unit is machinery
Power unit, the machine power unit include motor, reducing gear, trapezoidal screw, reducing gear described in the motor connection,
The reducing gear connects the trapezoidal screw.
9. the verifying attachment of pilot operated safety valve according to claim 2, it is characterised in that the pressure detecting part is
Weighing sensor.
10. the verifying attachment of pilot operated safety valve according to claim 4, it is characterised in that also including voice module, institute
State processing module and send speech data to the voice module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621246466.0U CN206299852U (en) | 2016-11-17 | 2016-11-17 | A kind of verifying attachment of pilot operated safety valve and pilot operated safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621246466.0U CN206299852U (en) | 2016-11-17 | 2016-11-17 | A kind of verifying attachment of pilot operated safety valve and pilot operated safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206299852U true CN206299852U (en) | 2017-07-04 |
Family
ID=59211658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621246466.0U Expired - Fee Related CN206299852U (en) | 2016-11-17 | 2016-11-17 | A kind of verifying attachment of pilot operated safety valve and pilot operated safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206299852U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106439130A (en) * | 2016-11-17 | 2017-02-22 | 宋新建 | Pilot operated safety valve and inspection device thereof |
-
2016
- 2016-11-17 CN CN201621246466.0U patent/CN206299852U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106439130A (en) * | 2016-11-17 | 2017-02-22 | 宋新建 | Pilot operated safety valve and inspection device thereof |
| CN106439130B (en) * | 2016-11-17 | 2020-02-04 | 宋新建 | Inspection device for pilot operated safety valve |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20170704 Termination date: 20211117 |