CN106768722A - A kind of closure pressure testing device and closure pressure-measuring method suitable for mesohigh Gas Pipe - Google Patents
A kind of closure pressure testing device and closure pressure-measuring method suitable for mesohigh Gas Pipe Download PDFInfo
- Publication number
- CN106768722A CN106768722A CN201710011405.9A CN201710011405A CN106768722A CN 106768722 A CN106768722 A CN 106768722A CN 201710011405 A CN201710011405 A CN 201710011405A CN 106768722 A CN106768722 A CN 106768722A
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- Prior art keywords
- gas pipe
- piston rod
- closure pressure
- testing device
- pressure testing
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- 238000012360 testing method Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000003825 pressing Methods 0.000 claims abstract description 43
- 229910001060 Gray iron Inorganic materials 0.000 claims abstract description 3
- 238000007789 sealing Methods 0.000 claims description 15
- 238000005259 measurement Methods 0.000 claims description 6
- 238000007689 inspection Methods 0.000 claims description 5
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 229920002521 macromolecule Polymers 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 104
- 239000000567 combustion gas Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 230000008569 process Effects 0.000 description 20
- 238000001514 detection method Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 239000004047 hole gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
- G01M3/2815—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes using pressure measurements
Abstract
A kind of closure pressure testing device suitable for mesohigh Gas Pipe, is related to gas works field, and it includes surveying checking device, power set, cushion and pressing plate；Power set include gray iron, piston and piston rod；Chamber is provided with cylinder body, cylinder body possesses first end face and second end face, and piston rod includes first end and the second end；Piston is fixedly connected with piston rod, and piston rod runs through cylinder body；The axial direction of piston rod is provided with gas port, and cushion is arranged between pressing plate and first end face.The apparatus structure is simply easy to use, quickly can be docked with Gas Pipe, and can closely be fitted with combustion gas inside pipe wall by power set, plugging effect is good, being capable of effective prevent leakage, and by the gas port on piston rod, air pressure, gas in the Gas Pipe of closure etc. can accurately be measured.Based on the above-mentioned closure pressure testing device suitable for mesohigh Gas Pipe, present invention also offers one kind closure pressure-measuring method.
Description
Technical field
The present invention relates to gas works field, in particular to a kind of closure pressure testing suitable for mesohigh Gas Pipe
Device and closure pressure-measuring method.
Background technology
Gas Pipe overhauled and the process installed in the middle of, in order to ensure the security of fuel gas transmission is, it is necessary to combustion gas
Pipeline carries out pressure testing inspection, it is ensured that the security performance that the situation of gas pipeline No leakage occurs and uses, by pressure testing inspection
Gas pipeline after qualified could put into normal transmission ＆ distribution operation.
And in the middle of existing technology, in the middle of the process for carrying out pressure testing inspection, due to the complex operation of pressure testing device, and
Blocked and the process of pressure testing in the middle of, easily there is the situation of gas leakage, and due at the construction field (site), particularly firing
Gas is speedily carried out rescue work in operation, there are the different operating modes of each work post, and field condition is complex, once the improper generation combustion gas of operation is let out
Leakage, it will cause quite serious accident.
And existing detection methods need to need to install plugging device and carrying out pressure testing in the middle of the process of detection
Need to pull down plugging device during detection, the complex repetition of the process operation, and weld job of getting angry must be carried out, in test
The time needed in the middle of process is more long, and work rate is not high.
The content of the invention
It is an object of the invention to provide a kind of closure pressure testing device suitable for mesohigh Gas Pipe, it is applied to by this
The closure pressure testing device of mesohigh Gas Pipe, can be while blocking to data such as the air pressure in Gas Pipe to Gas Pipe
Measure, the apparatus structure is simple, without fire operation, easy to use, quickly can carry out abutting joint with Gas Pipe,
And convenient disassembly, and good airproof performance, it is possible to increase the risk of gas leakage is reduced while operating efficiency, construction is improve
The safety coefficient at scene.
Another object of the present invention is to a kind of closure pressure-measuring method be additionally provided, it makes use of in above-mentioned being applied to
The closure pressure testing device of high-pressure gas pipe, is installed in Gas Pipe, is used the special occasions such as fire operation are unable to, meaning
It is especially great, the efficiency of closure pressure testing is improve, and the risk of gas leakage can also be reduced.
What embodiments of the invention were realized in：
A kind of closure pressure testing device suitable for mesohigh Gas Pipe, it include survey checking device, power set, cushion and
Pressing plate；Power set include gray iron, piston and piston rod；Chamber is provided with cylinder body, cylinder body possesses first end face and second
End face, piston rod includes first end and the second end；Second end face is provided with the cylinder cap mounting hole for installing cylinder cap, first end face and cylinder cap
Piston rod is provided with by hole；Piston is fixedly connected with piston rod, and piston rod runs through cylinder body through two piston rods by hole, living
Plug is located in chamber, and first end and the second end are located at outside cylinder body；Cylinder cap and cylinder cap mounting hole, piston and chamber and piston rod with
Piston rod between hole by being equipped with sealing ring；Second end face is provided with via, and piston is formed close to first end face with chamber
Hold matter chamber, via is turned on matter chamber is held；The axial direction of piston rod is provided with gas port, the two of gas port conducting piston rod
End；First end is connected with pressing plate, and the through hole through pressing plate is provided with along gas port profile, and cushion is arranged on pressing plate and first end face
Between；Survey checking device and be arranged on the second end, and turned on gas port.
To be applied to after the closure pressure testing device of mesohigh Gas Pipe loading Gas Pipe, by suitable for mesohigh combustion gas
The power set of the closure pressure testing device of pipe drive piston rod movement so that cushion deforms under the pressure effect of pressing plate,
In the middle of the process of cushion deformation, the part of its deformation can closely fit with the inwall of Gas Pipe, play sealing and fix
Effect, the process can be rapidly performed by the presence of power set, and leading for axially conducting is additionally provided with piston rod
Stomata, the data such as the pressure in the Gas Pipe of closure can be measured by gas port.
In an embodiment of the present invention：Power set are hydraulic power unit or Pneumatic propelling plant.
In an embodiment of the present invention：Checking device is surveyed with the second end to be threadedly coupled, and surveys checking device and second
Gasket seal is provided between the joint face at end.
In an embodiment of the present invention：Piston is with piston rod by integral type is made.
In an embodiment of the present invention：O-ring seal is provided between pressing plate and the contact surface of first end.
In an embodiment of the present invention：Piston, piston rod, cylinder body and pressing plate are made up of aluminium alloy.
In an embodiment of the present invention：Cushion is made up of macromolecule silica gel.
In an embodiment of the present invention：The corner arc transition of pressing plate.
In an embodiment of the present invention：Pressing plate is provided with annular protrusion with the contact surface of cushion.
One kind closure pressure-measuring method, it uses the above-mentioned closure pressure testing device suitable for mesohigh Gas Pipe；
Closure pressure-measuring method includes herein below：
The closure pressure testing device for being applied to mesohigh Gas Pipe is placed in one end of Gas Pipe, and makes the second end of cylinder body
Show out outside Gas Pipe；
High-pressure medium is input into matter chamber is held by via, drives piston rod band dynamic pressure plate near first end face, make elasticity
Pad is produced and is radially expanded and in sealing contact with the inner peripheral surface of Gas Pipe by pressing plate and first end face extruding；
By the other end of Gas Pipe to the gas that preset vol is sent into Gas Pipe, then read survey checking device and measure
The internal pressure value of the Gas Pipe for arriving；
Pressurize Preset Time, then again reads off the internal pressure value for surveying the Gas Pipe that checking device measurement is obtained.
Technical scheme at least possesses following beneficial effect：
The closure pressure testing device suitable for mesohigh Gas Pipe that embodiments of the invention are provided, it can not can get angry
Code in Hazardous Special Locations region can implement the closure detection operation such as pressure testing, and in Gas Pipe while being blocked to Gas Pipe
The data such as air pressure measure, the apparatus structure is simple, easy to use, quickly can carry out abutting joint with Gas Pipe,
And good airproof performance, while certainty of measurement is improved, additionally it is possible to the risk of gas leakage is reduced while improving operating efficiency,
Improve the safety coefficient of job site.The closure pressure-measuring method that the present invention is provided, it makes use of above-mentioned suitable for mesohigh
The closure pressure testing device of Gas Pipe, is installed in Gas Pipe, improves the efficiency of closure pressure testing, and can also reduce combustion gas
The risk of leakage.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be attached to what is used needed for embodiment
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, thus be not construed as it is right
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 is the closure pressure testing device structural representation suitable for mesohigh Gas Pipe in the embodiment of the present invention；
Fig. 2 is the powerplant configuration schematic diagram in the embodiment of the present invention；
Fig. 3 is the appearance matter chamber schematic diagram in the embodiment of the present invention；
Fig. 4 is the cushion scheme of installation in the embodiment of the present invention；
Fig. 5 is the O-ring seal scheme of installation in the embodiment of the present invention.
In figure：10- is applied to the closure pressure testing device of mesohigh Gas Pipe；110- surveys checking device；120- power set；
130- cushions；140- pressing plates；121- cylinder bodies；122- piston rods；123- first ends；The ends of 124- second；125- first end faces；
126- second end faces；127- gas ports；128- cylinder head；129- piston rods pass through hole；1211- cylinder head mounting holes；1221- lives
Plug；1261- vias；150- sealing rings；160- holds matter chamber；170- O-ring seals.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Present invention implementation generally described and illustrated in accompanying drawing herein
The component of example can be arranged and designed with a variety of configurations.
Therefore, the detailed description of embodiments of the invention below to providing in the accompanying drawings is not intended to limit claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiment in the present invention, this area is common
The every other embodiment that technical staff is obtained under the premise of creative work is not made, belongs to the model of present invention protection
Enclose.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined in individual accompanying drawing, then it need not be further defined and explained in subsequent accompanying drawing.
In the description of the invention, it is necessary to explanation, term " on ", D score, etc. instruction orientation or position relationship be
Based on orientation shown in the drawings or position relationship, or the orientation usually put when using of the invention product or position relationship,
It is for only for ease of the description present invention and simplifies description, must has rather than the device or element for indicating or implying meaning specific
Orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.Additionally, term " first ",
" second " etc. is only used for distinguishing description, and it is not intended that indicating or implying relative importance.
Embodiment 1
Fig. 1 is refer to, Fig. 1 shows the closure pressure testing dress suitable for mesohigh Gas Pipe that will be described below
Put 10.It can be seen that should be applied to mesohigh Gas Pipe closure pressure testing device 10 mainly include survey checking device 110,
Power set 120, cushion 130 and pressing plate 140.
Refer to Fig. 2, Fig. 2 shows the primary structure of power set 120, power set 120 mainly include cylinder body 121,
Cylinder head 128, piston 1221 and piston rod 122, the inside of cylinder body 121 is hollow chamber, and cylinder body 121 possesses first end face
125 and second end face 126, second end face 126 is provided with the cylinder head mounting hole 1211 for installing cylinder head 128, first end face 125 and
Cylinder head 128 is provided with piston rod by hole 129；The two ends of piston rod 122 are respectively the end 124 of first end 123 and second, piston
1221 with piston rod 122 by integral type is made, piston rod 122 is through two piston rods by the through cavities of hole 129 and installed in cylinder
On body 121, and the end 124 of first end 123 and second of piston rod 122 is respectively positioned on outside cylinder body 121, and piston 1221 is located at chamber
It is interior；Cylinder head 128 and cylinder head mounting hole 1211, piston 1221 and chamber and piston rod 122 and piston rod by hole 129 it
Between be equipped with sealing ring 150；The axial direction of piston rod 122 is provided with gas port 127, the conducting piston rod 122 of gas port 127
Two ends.
Fig. 3 is refer to, while piston rod 122 runs through 121 internal cavity of cylinder body, piston rod 122 yet forms both with chamber and lean on
The appearance matter chamber for accommodating conducting pressure medium of nearly first end face 125, and opened on the end face at the second end 124 on cylinder body 121
There is via 1261, the via 1261 conducting the appearance matter chamber 160 and outer pipeline, in the middle of the process for using, by outer tube
Road direction holds the medium of injection conducting pressure in matter chamber 160 so that hold the pressure increase in matter chamber 160, due to the appearance matter chamber
Room 160 pressure increase and the pressure in the external world is smaller so that piston rod 122 under the effect of the pressure relative to cylinder body 121 from
First end 123 is moved up to the side at the second end 124.
Be would know that by the above, in the middle of prior art the medium of the conducting pressure of power set 120 can be liquid or
Gas, therefore according to above-mentioned principle, the power set 120 can be made hydraulic power unit 120 or Pneumatic propelling plant 120.
Because in the middle of the process of specific implementation, hydraulicdriven precision is higher, in the middle of the process of specific implementation, power set 120
Preferably should be driven using hydraulic cylinder.Therefore in the middle of the present embodiment, power set 120 use hydraulic power unit 120.
Can also be seen that the first end 123 of the piston rod 122 outside cylinder body 121 passes through bullet from Fig. 4 and with reference to Fig. 1
Property pad 130 and be connected with pressing plate 140, the connected mode of pressing plate 140 and piston rod 122 is to be threadedly coupled.It is provided with pressing plate 140
The through hole corresponding with the profile of gas port 127 in first end 123, it is therefore intended that the first end of side is turned on by the through hole
Gas port 127 on 123 and inside the Gas Pipe of the opposite side of pressing plate 140.
Fig. 5 is refer to, O-ring seal 170 also can be set between pressing plate 140 and the contact surface of piston rod 122, in piston rod
In the middle of 122 processes being connected with pressing plate 140, can crush seal cushion rubber 170 so that O-ring seal 170 and piston rod 122 and
Contact between pressing plate 140 is more tight, it is therefore intended that improve the air-tightness of the device.
In order that obtaining, above-mentioned sealing effectiveness is more effective, ring is provided with the contact surface of pressing plate 140 and cushion 130
The projection of shape, contacts and extrudes in the middle of the process of cushion 130 in pressing plate 140 with cushion 130, the meeting of cushion 130 and pressing plate
140 surface is closely fitted, especially at annular protrusion, while annular protrusion is fitted completely, also according to convex annular
The sealing for foring annular is acted, and the sealing of the annular is formed according to the profile of annular protrusion, and pressing plate 140 is to cushion
130 bigger annular sealing effectiveness of pressure is more obvious, thus airtight in the middle of the process for compressing cushion 130 to increase
Property.In other embodiments of the invention, setting for annular protrusion can choose whether to set ring according to different use environments
Shape is raised, and annular protrusion profile size and quantity.
Installation site according to above-mentioned cushion 130 can be known, because cushion 130 is installed on pressing plate 140 and liquid
Between the cylinder body 121 of cylinder pressure, and pressing plate 140 is connected with the piston rod 122 of power set 120, by piston rod 122 relative to
The movement of the cylinder body 121 of hydraulic cylinder can be moved with dynamic pressure plate 140, it is possible thereby to change the cylinder body 121 of pressing plate 140 and hydraulic cylinder
The distance between, because cushion 130 is just between the cylinder body 121 of pressing plate 140 and hydraulic cylinder, it is possible to by piston
The mobile extruding cushion 130 of bar 122 so that cushion 130 is deformed upon, when the device is arranged in Gas Pipe, leads to
The deformation of cushion 130 is crossed, enables to the crushed element of cushion 130 to be fitted with the inwall of Gas Pipe, thus, with good
The closure pressure testing device 10 for being applied to mesohigh Gas Pipe is fixed in Gas Pipe while good air-tightness.
In the present embodiment, it is the barometer on the end 124 of piston rod 122 second to survey checking device 110, and and piston
Gas port 127 on the end 124 of bar 122 second is turned on, due to being turned in the gas port 127 on piston rod 122 and Gas Pipe, so
Barometer just can determine the air pressure in now Gas Pipe, and it should be noted that barometer is being arranged on into piston rod 122
During the second end 124, barometer is to be threadedly coupled with the connected mode of piston rod 122, and is set between barometer and gas port 127
There is sealing device, the sealing device can be gasket seal etc., it is therefore intended that prevent from being sent out in barometer and the junction of gas port 127
Angry body leakage.In other embodiments of the invention, due to actual conditions difference thus need the different data of measurement, so
Installing in the middle of the process for surveying checking device 110, can be according to the difference of the data in required Gas Pipe at the second end 124
Place is installed by different survey checking devices 110.Others survey checking device 110, should be according to foregoing air pressure in the middle of the process installed
The installation requirement of meter is installed, it is necessary to is carried out sealing installation process, specific steps therefore be will not be repeated here.
When in view of the device is installed in Gas Pipe, in order to prevent the device from being collided with the inwall of Gas Pipe
Or unnecessary damage is produced to combustion gas inside pipe wall and the device because of contact, and pressing plate 140 is in the mistake installed
Cheng Dangzhong is entered into Gas Pipe at first, therefore the corner on the end face of the close first end 123 of pressing plate 140 is provided with circular arc
Transition.
It should be noted that：
In the present embodiment, it is adaptable to which the specific size of the closure pressure testing device 10 of mesohigh Gas Pipe needs and Gas Pipe
Internal diameter size match, therefore carrying out be applied to mesohigh Gas Pipe closure pressure testing device 10 choose process in the middle of, can
With by adjustment suitable for mesohigh Gas Pipe closure pressure testing device 10 size to meet different Gas Pipes the need for.
In the present embodiment, blocked to Gas Pipe with the closure pressure testing device 10 suitable for mesohigh Gas Pipe
Pressure testing inspection is with a kind of implementation method of the device.In the middle of other embodiment of the invention, mesohigh should be applied to
The closure pressure testing device 10 of Gas Pipe also can be used to carry out anti-leak detection to the valve installed in pipeline, carry out valve
Block in the middle of the process of pressure testing, it is necessary to tested valve is arranged on pipeline, and the pipeline of valve is installed and let out as valve is anti-
The carrier of leak detection needs to be to be checked by pressure testing and is qualified pipeline, with above-mentioned checking step the step of follow-up detection
It is similar therefore will not be repeated here.
In the present embodiment, various situations are considered, should be preferably high in the making material from cushion 130
Molecule silica gel.In other embodiments of the invention, it is also possible to consider to use the other materials such as rubber.
In the present embodiment, the material of piston rod 122, cylinder body 121 and pressing plate 140 preferably aluminum alloy materials should make.
Comprised the steps of using the closure pressure-measuring method for being applied to the closure pressure testing device 10 of mesohigh Gas Pipe：
The closure pressure testing device 10 for being applied to mesohigh Gas Pipe is placed in one end of Gas Pipe, and makes cylinder body 121
Second end face 126 is exposed outside Gas Pipe；
High-pressure medium is input into matter chamber is held by via 1261, drives piston rod 122 with dynamic pressure plate 140 near first end
Face 125, makes cushion 130 extrude generation by pressing plate 140 and first end face 125 and is radially expanded and is sealed with the inner peripheral surface of Gas Pipe
Contact；
By the other end of Gas Pipe to the gas that preset vol is sent into Gas Pipe, then read survey checking device 110 and survey
The internal pressure value of the Gas Pipe for measuring；
Pressurize Preset Time, then again reads off and surveys the internal pressure value that checking device 110 measures the Gas Pipe for obtaining.
This is suitable for operation principle of the closure pressure testing device 10 of mesohigh Gas Pipe：
In the Gas Pipe for the device being properly attached to need carry out to block pressure testing, by power set 120 with piston
The movement of bar 122, at the same time piston rod 122 moved with dynamic pressure plate 140 and extrude cushion 130, when cushion 130 by squeeze
Deformed upon in the middle of the process of pressure, and fitting and then realizing closure and close by the part and the inwall of Gas Pipe that deform
The purpose of envelope.
By the gas port 127 on piston rod 122, can turn in Gas Pipe and barometer, be added to Gas Pipe
In the middle of the process of pressure, the air pressure in Gas Pipe now just can be measured by barometer, in the middle of the process for measuring, it is necessary to
A period of time in pressurization after Gas Pipe in air pressure be monitored.After the measurement has been completed, by the pressure to measuring
The judgement of value, just can show whether the Gas Pipe is qualified.
Deflation valve is finally opened, when the value in barometer is shown as normal pressure, then mesohigh Gas Pipe will be applied to
Closure pressure testing device 10 is removed, and carries out follow-up work.
The preferred embodiments of the present invention are the foregoing is only, is not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of closure pressure testing device suitable for mesohigh Gas Pipe, it is characterised in that：It is described suitable for mesohigh Gas Pipe
Closure pressure testing device include surveying checking device, power set, cushion and pressing plate；
The power set include gray iron, piston and piston rod；Chamber is provided with the cylinder body, the cylinder body possesses
End face and second end face, the piston rod include first end and the second end；The second end face is provided with installs the cylinder cap
Cylinder cap mounting hole, the first end face and the cylinder cap are provided with piston rod by hole；The piston is fixed with the piston rod and connected
Connect, and the piston rod runs through the cylinder body through two piston rods by hole, and the piston is located in the chamber, institute
State first end and second end is located at outside the cylinder body；
The cylinder cap passes through with the cylinder cap mounting hole, the piston and the chamber and the piston rod with the piston rod
Sealing ring is equipped between hole；
The second end face is provided with via, and the piston is formed close to the appearance matter chamber of the first end face, institute with the chamber
Via is stated to be turned on the appearance matter chamber；
The axial direction of the piston rod is provided with gas port, and the gas port turns on the two ends of the piston rod；
The first end is connected with the pressing plate, and the through hole through the pressing plate, the elasticity are provided with along the gas port profile
Pad is arranged between the pressing plate and the first end face；It is described survey checking device be arranged on second end, and with the air guide
Hole turns on.
2. the closure pressure testing device suitable for mesohigh Gas Pipe according to claim 1, it is characterised in that：The power
Device is hydraulic power unit or Pneumatic propelling plant.
3. the closure pressure testing device suitable for mesohigh Gas Pipe according to claim 1, it is characterised in that：It is described to survey inspection
Device is provided with sealing gasket with second end to be threadedly coupled, and between the survey checking device and the joint face at second end
Piece.
4. the closure pressure testing device suitable for mesohigh Gas Pipe according to claim 1, it is characterised in that：The piston
With the piston rod by integral type is made.
5. the closure pressure testing device suitable for mesohigh Gas Pipe according to claim 1, it is characterised in that：The pressing plate
O-ring seal is provided with and the contact surface of the first end between.
6. the closure pressure testing device suitable for mesohigh Gas Pipe according to claim 1, it is characterised in that：The work
Plug, the piston rod, the cylinder body and the pressing plate are made up of aluminium alloy.
7. the closure pressure testing device suitable for mesohigh Gas Pipe according to claim 1, it is characterised in that：The elasticity
Pad is made up of macromolecule silica gel.
8. the closure pressure testing device suitable for mesohigh Gas Pipe according to claim 1, it is characterised in that：The pressing plate
Corner arc transition.
9. the closure pressure testing device suitable for mesohigh Gas Pipe according to claim 1, it is characterised in that：The pressing plate
Contact surface with the cushion is provided with annular protrusion.
It is 10. a kind of to block pressure-measuring method, it is characterised in that：The closure pressure-measuring method uses claim 1-9 any one
The described closure pressure testing device suitable for mesohigh Gas Pipe；
The closure pressure-measuring method is comprised the steps of：
The closure pressure testing device suitable for mesohigh Gas Pipe is placed in one end of Gas Pipe, and makes the of the cylinder body
Biend exposes outside the Gas Pipe；
High-pressure medium is input into the appearance matter chamber by the via, drives the piston rod to drive the pressing plate near described
First end face, make the cushion by the pressing plate and the first end face extruding produce be radially expanded and with the Gas Pipe
Inner peripheral surface is in sealing contact；
By the other end of the Gas Pipe to the gas that preset vol is sent into the Gas Pipe, then read described survey and examine dress
Put the internal pressure value of the Gas Pipe that measurement is obtained；
Pressurize Preset Time, then again reads off the internal pressure value of the Gas Pipe that the survey checking device measurement is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710011405.9A CN106768722A (en) | 2017-01-06 | 2017-01-06 | A kind of closure pressure testing device and closure pressure-measuring method suitable for mesohigh Gas Pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710011405.9A CN106768722A (en) | 2017-01-06 | 2017-01-06 | A kind of closure pressure testing device and closure pressure-measuring method suitable for mesohigh Gas Pipe |
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| Publication Number | Publication Date |
|---|---|
| CN106768722A true CN106768722A (en) | 2017-05-31 |
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|---|---|---|---|
| CN201710011405.9A Pending CN106768722A (en) | 2017-01-06 | 2017-01-06 | A kind of closure pressure testing device and closure pressure-measuring method suitable for mesohigh Gas Pipe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN107576452A (en) * | 2017-09-25 | 2018-01-12 | 西峡县内燃机进排气管有限责任公司 | Exhaust manifold airtight detecting apparatus and method |
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Application publication date: 20170531 |