CN105890851A - Large-caliber cast iron pipe pressure testing device without backrest, and large-caliber cast iron pipe pressure testing method without backrest - Google Patents
Large-caliber cast iron pipe pressure testing device without backrest, and large-caliber cast iron pipe pressure testing method without backrest Download PDFInfo
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- CN105890851A CN105890851A CN201610242071.1A CN201610242071A CN105890851A CN 105890851 A CN105890851 A CN 105890851A CN 201610242071 A CN201610242071 A CN 201610242071A CN 105890851 A CN105890851 A CN 105890851A
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- 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
-
- 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
- G01M3/2884—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 welds
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a large-caliber cast iron pipe pressure testing device without a backrest, and a large-caliber cast iron pipe pressure testing method without a backrest. The large-caliber cast iron pipe pressure testing device without a backrest includes a pressure testing short pipe and a pressure release apparatus, wherein the pressure testing short pipe includes a partition-type blind plate; two sides of the partition-type blind plate are symmetrically provided with standard short pipes; two ends of the pressure testing short pipe are connected with two adjacent pipes waiting for pressure testing; the pressure release apparatus sleeves the pressure testing short pipe; and during the pressure testing process, the pressure difference at two sides of the partition-type blind plate is transmitted to the inner wall of a valve chamber through the pressure release apparatus. For the large-caliber cast iron pipe pressure testing device without a backrest, the partition-type blind plate is utilized to separate the adjacent two ends; and approximately equivalent pressure are generated from the two ends of the partition-type blind plate through pressure testing of the adjacent two segments of pipes waiting for pressure testing at the same time, so that the pressure are mutually cancelled out and the wall of the valve chamber can fully accept to enable pressure testing of the pipe to have no demand for setting a backrest and an anchored pier additionally. Therefore, the large-caliber cast iron pipe pressure testing device without a backrest is simple in operation, can improve the pressure testing efficiency and reduce the construction period for pressure testing so as to improve the construction continuity and reduce the consumed materials for the construction scheme, is high in universality, and is convenient for movement.
Description
Technical field
The present invention relates to industrial pipeline mounting technique field, be specifically related to a kind of Large Diameter Pipeline cast-iron pipe without backrest pressure testing device and examination
Pressure method.
Background technology
During the defeated cast iron pipe pressure testing of Large Diameter Pipeline length, owing to caliber is big, the thrust produced in PRESSURE TESTING BLIND FLANGE tends to reach several
The thrust of No. ten the most up to a hundred tons, more traditional method arranges large-scale backrest exactly, arranges large-sized concrete anchor block after backrest,
Bear pipeline medium by anchor block and pass to the pressure of blindly plate.Such pressure-measuring method generally requires the considerably long duration, because
Needing breaking part pipeline to build anchor block by laying bricks or stones, anchor block also needs to sufficiently long curing period after laying, town to be cut after pressure testing is qualified
Pier, recovers original pipeline and builds valve well.This is the most time-consuming takes a lot of work, and is also consumed by substantial amounts of backrest scheme materials.
Summary of the invention
The technical problem to be solved in the present invention is, in view of the foregoing defects the prior art has, it is provided that Large Diameter Pipeline cast-iron pipe without
Backrest pressure testing device and pressure-measuring method, make pipeline pressure test without additionally arranging backrest and anchor block, simple to operate, improve pressure testing effect
Rate shortens the pressure testing duration, makes construction seriality be improved, decreases arrangement and method for construction materials, highly versatile, it is simple to mobile.
The present invention solves that above-mentioned technical problem be the technical scheme is that
Large Diameter Pipeline cast-iron pipe is without backrest pressure testing device, and including pressure testing short tube and pressure relief device, described pressure testing short tube includes partition-type
Blind plate, partition-type blind plate is symmetrically arranged on two with standard short tube, and the standard short tube outer end of both sides is equipped with flange, during test pressure,
Pressure testing short tube is positioned in valve well, and pressure testing short tube two ends are connected with adjacent two sections of pressure pipelines to be measured by flange respectively, and pressure release fills
Put and be located on pressure testing short tube, pressure relief device one end with standard short tube outside partition-type blind plate contact, the pressure relief device other end and valve
Door well contact internal walls, is delivered to the pressure differential of partition-type blind plate both sides on valve well inwall by pressure relief device when pressure testing.
Connect technique scheme, between described partition-type blind plate and both sides standard short tube cylindrical, be provided with the first reinforcement.
Connect technique scheme, between described partition-type blind plate and both sides standard short tube inner circle, be provided with the second reinforcement.
Connecing technique scheme, described second reinforcement is groined type distribution.
Connecing technique scheme, described pressure relief device includes supporting ring flat-plate, multiple jack and locating sleeve, and jack is by fixed
Position sleeve pipe is vertically installed on supporting ring flat-plate.
Connecing technique scheme, described supporting ring flat-plate is provided with the 3rd reinforcement.
Connecing technique scheme, described supporting ring flat-plate includes that two semicircular ring, two semicircular ring are arranged symmetrically with, two semicircular ring two
End is connected by flower basket bolt.
Connecing technique scheme, described jack is distributed on supporting ring flat-plate centered by the supporting ring flat-plate center of circle symmetrically and evenly.
Large Diameter Pipeline cast-iron pipe, without backrest pressure-measuring method, comprises the following steps:
1) two standard short tubes are welded with partition-type blind plate both sides, be fabricated to pressure testing short tube；
2) pressure testing short tube is positioned in valve well, pressure testing short tube two ends are connected with adjacent pipe under test respectively；
3) in the pipe under test at pressure testing short tube two ends, water pump, hydraulic test pump, air bleeding valve and Pressure gauge it are respectively mounted；
4) valve well external earthen backfill compacting, is set in pressure relief device on pressure testing short tube and is connected with valve well inwall；
5) water pump is opened, water flowing in the pipe under test at pressure testing short tube two ends, stop water flowing when reaching to soak water flow of pipeline, start
Soak pipe under test；
6), after soaking and reaching to want seeking time, start continuation water flowing in the pipe under test at pressure testing short tube two ends, and open air bleeding valve and enter
Row aerofluxus；
7) after reaching certain hydraulic pressure in the pipe under test at pressure testing short tube two ends, the stopping that switching off the pump adds water, and then opens hydraulic test pump
Pressurization；
8) observe the reading of pressure testing short tube pressure at two ends table, during pressurization, make the force value indicated by two Pressure gauges roughly equal；
9) arranging personnel along pipeline cruising while pressurization, if finding, pipe under test leak source is circulated a notice of in time, and two ends pressure release simultaneously processes,
Leak source is repaired；
10) after leak source is repaired, two ends simultaneously slowly boosting, until reaching test pressure, voltage stabilizing reach qualified after, two ends
Blood pressure lowering simultaneously；
11) remove pressure testing short tube, water pump, hydraulic test pump and air bleeding valve and Pressure gauge after drained water, put into next pipe under test section
Work pressure test, repeat step 2)～10) until all pipe under test section pressure testings are complete.
Connect technique scheme, described step 3) in, pressure relief device is being set on pressure testing short tube and is connecting with valve well inwall
Before connecing, valve well inwall arranges protection backing plate.
The method have the advantages that
1, this pressure testing device and pressure-measuring method are adjacent both ends to be cut off by partition-type blind plate, same by adjacent two sections of pipe under test
Time pressure testing, make partition-type blind plate two ends produce roughly the same pressure, cancel out each other, thus make partition-type blind plate bear as far as possible
Less thrust, the valve borehole wall can accept completely, make pipeline pressure test without additionally arranging backrest and anchor block, simple to operate, carry
The high pressure testing efficiency reduction pressure testing duration, making construction seriality be improved, decrease arrangement and method for construction materials, pressure testing device leads to
Strong by property, it is simple to mobile.
2, pressurize in pressure testing short tube two ends simultaneously, uses most pressure at two ends to cancel out each other, partition-type blind plate is provided with and lets out
Pressure device, when pressure testing short tube pressure at two ends is not suitable, passes to valve well inwall, well by unbalanced pressure by pressure relief device
Arranging protection backing plate on wall, be backfilling and compacted outside valve well, simultaneously pressure measurement, pressure at two ends is cancelled out each other, and causes on partition-type blind plate
Pressure the least, by Force Calculation, the valve well borehole wall is entirely capable of bearing.
Accompanying drawing explanation
Fig. 1 be in the embodiment of the present invention Large Diameter Pipeline cast-iron pipe without the work elevation of backrest pressure testing device；
Fig. 2 be in the embodiment of the present invention Large Diameter Pipeline cast-iron pipe without the work front view of backrest pressure testing device；
Fig. 3 is the elevation of pressure testing short tube in the embodiment of the present invention；
Fig. 4 is the front view of pressure testing short tube in the embodiment of the present invention；
Fig. 5 is the left view of Fig. 4；
Fig. 6 is the elevation of pressure relief device in the embodiment of the present invention；
Fig. 7 is the front view of pressure relief device in the embodiment of the present invention；
Fig. 8 is the left view of Fig. 7；
In figure, 1-partition-type blind plate, 2-standard short tube, 3-the first reinforcement, 4-the second reinforcement, 5-flange, 6-communicating pipe,
7-supports ring flat-plate, 8-jack, 9-locating sleeve, 10-the 3rd reinforcement, 11-flower basket bolt, 12-steady pin, 13-pressure testing
Short tube, 14-pressure relief device, 15-steel pipe, 16-cast iron pipe, 17-dish holds and dish is inserted, and 18-valve well, 19-protects backing plate.
Detailed description of the invention
The present invention is described in detail with embodiment below in conjunction with the accompanying drawings.
As shown in Fig. 1～Fig. 8, the Large Diameter Pipeline cast-iron pipe in the embodiment that the present invention provides without backrest pressure testing device, including
Pressure testing short tube 13 and pressure relief device 14, as shown in Figure 2 to 3, described pressure testing short tube 13 includes partition-type blind plate 1, partition-type
Blind plate 1 is symmetrically arranged on two with standard short tube 2, and standard short tube 2 outer end of both sides is equipped with flange 5, and during test pressure, pressure testing is short
Pipe 13 is positioned in valve well 18, and pressure testing short tube 13 two ends are connected by flange 5 pressure pipeline to be measured with adjacent both ends respectively, let out
Pressure device 14 is located on pressure testing short tube 13, pressure relief device 14 one end with standard short tube 2 outside partition-type blind plate 1 contact, let out
Pressure device 14 other end and valve well 18 contact internal walls, filled the pressure differential of partition-type blind plate 1 both sides by pressure release when pressure testing
Put 14 to be delivered on valve well 18 inwall；Pressurizeing in pressure testing short tube 13 two ends simultaneously, uses most pressure at two ends mutually to support
Disappear, partition-type blind plate 1 is provided with pressure relief device 14, when pressure testing short tube 13 pressure at two ends is not suitable, by unbalanced pressure
Pass to valve well 18 inwall by pressure relief device 14, the borehole wall arrange protection backing plate 19, is backfilling and compacted outside valve well 18,
Pressure measurement simultaneously, pressure at two ends is cancelled out each other, and causes the pressure on partition-type blind plate 1 the least, by Force Calculation, valve
Well 18 borehole wall is entirely capable of bearing.
In one of them embodiment further, described partition-type blind plate 1 by completely separated for the standard short tube 2 of both sides, two ends
Standard short tube 2 do not connect, standard short tube 2 outer wall welds with partition-type blind plate 1, ratio inner tube and partition-type blind plate 1 Welder
Skill is simpler, easy to operate, is more easy to detect weld seam the most intact.
Further, the first reinforcement 3 it is provided with between described partition-type blind plate 1 and both sides standard short tube 2 cylindrical；Described first
Reinforcement 3 has multiple, is distributed in the surrounding of standard short tube 2 cylindrical uniformly.
Further, the second reinforcement 4 it is provided with between described partition-type blind plate 1 and both sides standard short tube 2 inner circle.
Further, described second reinforcement 4 is distributed in groined type.
As shown in Figure 6 to 8, further, described pressure relief device 14 includes supporting ring flat-plate 7, multiple jack 8 and positioning sleeve
Pipe 9, jack 8 is vertically installed on supporting ring flat-plate 7 by locating sleeve 9.
Further, described supporting ring flat-plate 7 is provided with the 3rd reinforcement 10；3rd reinforcement 10 with supporting ring flat-plate 7 center of circle is
Centrosymmetry is uniformly distributed on supporting ring flat-plate 7.
Further, described supporting ring flat-plate 7 includes that two semicircular ring, two semicircular ring are arranged symmetrically with, and two semicircular ring two ends lead to
Crossing flower basket bolt 11 to connect, flower basket bolt 11 is connected with semicircular ring by steady pin 12.
Further, described jack 8 is distributed on supporting ring flat-plate 7 centered by supporting ring flat-plate 7 center of circle symmetrically and evenly；Very heavy
Pushing up 8 numbers is 4-8.
Further, described standard short tube 2 is communicated with pipe 6, outside making the air pressure in standard short tube 2 with standard short tube 2
Pressure communication, when standard short tube 2 carries out water flowing, the standard short tube 2 of partition-type blind plate 1 both sides is by carrying out down communicating pipe 6
Water and aerofluxus.
With reference to shown in Fig. 1～Fig. 8, use Large Diameter Pipeline cast-iron pipe without the Large Diameter Pipeline cast-iron pipe of enforcement during backrest pressure testing device without leaning on
Back of the body pressure-measuring method, comprises the following steps:
1) being welded with partition-type blind plate 1 both sides by two standard short tubes 2, be fabricated to pressure testing short tube 13, partition-type blind plate 1 will
Pressure testing short tube 13 therefrom between cut off；
2) pressure testing short tube 13 is positioned in valve well 18, pressure testing short tube 13 two ends are connected with adjacent pipe under test respectively
Good；
3) in the pipe under test at pressure testing short tube 13 two ends, water pump, hydraulic test pump, air bleeding valve and Pressure gauge it are respectively mounted；
4) valve well 18 external high-quality earthen backfill compacting, pressure relief device 14 is set on pressure testing short tube 13 and with valve well 18
Inwall connects；
5) water pump is opened, water flowing in the pipe under test at pressure testing short tube 13 two ends, stop water flowing when reaching to soak water flow of pipeline,
Start to soak pipe under test；
6), after immersion reaches to want seeking time, start to continue water flowing in the pipe under test at pressure testing short tube 13 two ends, and open aerofluxus
Valve is exhausted；
7) after reaching certain hydraulic pressure (certain hydraulic pressure is the 80% of design pressure) in the pipe under test at pressure testing short tube 13 two ends,
The stopping that switching off the pump adds water to prevent to boost too fast, then opens hydraulic test pump pressurization；
8) observe the reading of pressure testing short tube 13 pressure at two ends table, during pressurization, make the force value indicated by two Pressure gauges roughly equal；
9) arranging personnel along pipeline cruising while pressurization, if finding, pipe under test leak source is circulated a notice of in time, and two ends pressure release simultaneously processes,
Leak source is repaired；
10) after leak source is repaired, two ends simultaneously slowly boosting, until reaching test pressure, voltage stabilizing reach qualified after, two ends
Blood pressure lowering simultaneously；
11) remove pressure testing short tube 13, water pump, hydraulic test pump and air bleeding valve and Pressure gauge after drained water, put into next pipe under test
The work pressure test of section, repeats step 2)～10) until all pipe under test section pressure testings are complete.
General Large Diameter Pipeline cast iron pipe waterline, is held by dish outside valve well 18 and dish is inserted 17 and is converted into steel pipe 15, valve well
Steel pipe 15 it is entirely, it is simple to valve is installed in 18；Every section of cast iron pipe 16 is that the rubber seal sealing ring by bellmouth is attached
With sealing；After being passed through medium in pipeline pipeline, the pressure of medium has trend bellmouth and socket top departed from, thus existing
Have conventional pressure-measuring method have to be by dish hold or dish insert be connected with steel pipe 15 after, at steel pipe 15 end and backrest be set, then lean on
Back pass power is to anchor block, the purpose sealed during to reach pressure testing；By partition-type blind plate 1, adjacent both ends is cut off, by adjacent two
Section pipe under test pressure testing simultaneously, makes partition-type blind plate 1 two ends produce roughly the same pressure, cancels out each other, by partition-type blind plate
The thrust born is transferred on the valve borehole wall by pressure relief device, makes partition-type blind plate 1 bear less thrust as far as possible simultaneously,
Make valve well 18 wall can accept completely, it is not necessary to additionally arranging backrest and anchor block, this method is the most convenient to operate, improves pressure testing
The efficiency reduction pressure testing duration, make the construction seriality be improved, decrease arrangement and method for construction materials, pressure testing device highly versatile,
It is easy to mobile.
Further, described step 3) in, pressure relief device 14 is set on pressure testing short tube 13 and with valve well 18 inwall
Before connection, valve well 18 wall arranges protection backing plate 19.
This pressure-measuring method and pressure testing device are only used for the pressure testing of middle pipeline section, and the pipeline pressure test started in two ends need nonetheless remain for existing side
Method, completes pressure testing by backrest and anchor block.
Above is only presently preferred embodiments of the present invention, the interest field that certainly can not limit the present invention with this, therefore depends on
The equivalence change that scope of the present invention patent is made, still belongs to protection scope of the present invention.
Claims (10)
1. Large Diameter Pipeline cast-iron pipe is without a backrest pressure testing device, and including pressure testing short tube and pressure relief device, described pressure testing short tube includes
Partition-type blind plate, partition-type blind plate is symmetrically arranged on two with standard short tube, and the standard short tube outer end of both sides is equipped with flange, test pressure
During power, pressure testing short tube is positioned in valve well, and pressure testing short tube two ends are connected with adjacent two sections of pressure pipelines to be measured by flange respectively,
Pressure relief device is located on pressure testing short tube, pressure relief device one end with standard short tube outside partition-type blind plate contact, pressure relief device another
End and valve well contact internal walls, be delivered to valve well inwall by the pressure differential of partition-type blind plate both sides by pressure relief device when pressure testing
On.
Large Diameter Pipeline cast-iron pipe the most according to claim 1 is without backrest pressure testing device, it is characterised in that described partition-type is blind
It is provided with the first reinforcement between plate and both sides standard short tube cylindrical.
Large Diameter Pipeline cast-iron pipe the most according to claim 1 is without backrest pressure testing device, it is characterised in that described partition-type is blind
It is provided with the second reinforcement between plate and both sides standard short tube inner circle.
Large Diameter Pipeline cast-iron pipe the most according to claim 3 is without backrest pressure testing device, it is characterised in that described second strengthens
Muscle is groined type distribution.
Large Diameter Pipeline cast-iron pipe the most according to claim 1 is without backrest pressure testing device, it is characterised in that described pressure relief device
Including supporting ring flat-plate, multiple jack and locating sleeve, jack is vertically installed on supporting ring flat-plate by locating sleeve.
Large Diameter Pipeline cast-iron pipe the most according to claim 5 is without backrest pressure testing device, it is characterised in that described supporting ring flat-plate
It is provided with the 3rd reinforcement.
Large Diameter Pipeline cast-iron pipe the most according to claim 5 is without backrest pressure testing device, it is characterised in that described supporting ring flat-plate
Including two semicircular ring, two semicircular ring are arranged symmetrically with, and two semicircular ring two ends are connected by flower basket bolt.
Large Diameter Pipeline cast-iron pipe the most according to claim 5 is without backrest pressure testing device, it is characterised in that described jack with
It is distributed in symmetrically and evenly centered by the supporting ring flat-plate center of circle on supporting ring flat-plate.
9. employing Large Diameter Pipeline cast-iron pipe described in claim 1 is without the pressure-measuring method without backrest implemented during backrest pressure testing device, its
It is characterised by, comprises the following steps:
1) two standard short tubes are welded with partition-type blind plate both sides, be fabricated to pressure testing short tube；
2) pressure testing short tube is positioned in valve well, pressure testing short tube two ends are connected with adjacent pipe under test respectively；
3) in the pipe under test at pressure testing short tube two ends, water pump, hydraulic test pump, air bleeding valve and Pressure gauge it are respectively mounted；
4) valve well external earthen backfill compacting, is set in pressure relief device on pressure testing short tube and is connected with valve well inwall；
5) water pump is opened, water flowing in the pipe under test at pressure testing short tube two ends, stop water flowing when reaching to soak water flow of pipeline, start
Soak pipe under test；
6), after soaking and reaching to want seeking time, start continuation water flowing in the pipe under test at pressure testing short tube two ends, and open air bleeding valve and enter
Row aerofluxus；
7) after reaching certain hydraulic pressure in the pipe under test at pressure testing short tube two ends, the stopping that switching off the pump adds water, and then opens hydraulic test pump
Pressurization；
8) observe the reading of pressure testing short tube pressure at two ends table, during pressurization, make the force value indicated by two Pressure gauges roughly equal；
9) arranging personnel along pipeline cruising while pressurization, if finding, pipe under test leak source is circulated a notice of in time, and two ends pressure release simultaneously processes,
Leak source is repaired；
10) after leak source is repaired, two ends simultaneously slowly boosting, until reaching test pressure, voltage stabilizing reach qualified after, two ends
Blood pressure lowering simultaneously；
11) remove pressure testing short tube, water pump, hydraulic test pump and air bleeding valve and Pressure gauge after drained water, put into next pipe under test section
Work pressure test, repeat step 2)～10) until all pipe under test section pressure testings are complete.
Large Diameter Pipeline cast-iron pipe the most according to claim 9 is without backrest pressure-measuring method, it is characterised in that described step 3)
In, before being set in by pressure relief device on pressure testing short tube and being connected with valve well inwall, valve well inwall arranges neonychium
Plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610242071.1A CN105890851A (en) | 2016-04-18 | 2016-04-18 | Large-caliber cast iron pipe pressure testing device without backrest, and large-caliber cast iron pipe pressure testing method without backrest |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610242071.1A CN105890851A (en) | 2016-04-18 | 2016-04-18 | Large-caliber cast iron pipe pressure testing device without backrest, and large-caliber cast iron pipe pressure testing method without backrest |
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| Publication Number | Publication Date |
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| CN105890851A true CN105890851A (en) | 2016-08-24 |
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|---|---|---|---|
| CN201610242071.1A Pending CN105890851A (en) | 2016-04-18 | 2016-04-18 | Large-caliber cast iron pipe pressure testing device without backrest, and large-caliber cast iron pipe pressure testing method without backrest |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106284516A (en) * | 2016-08-29 | 2017-01-04 | 中国水利水电第十三工程局有限公司 | Water supply line suppress construction technology |
| CN107884141A (en) * | 2017-11-08 | 2018-04-06 | 浙江凯晨工贸有限公司 | A kind of butterfly valve air-tightness automatic detection device |
| CN111122302A (en) * | 2019-12-20 | 2020-05-08 | 上海绿地建设(集团)有限公司 | Pressing balancing device for buried socket water supply pipe |
| CN111982696A (en) * | 2020-08-28 | 2020-11-24 | 江西勃尧建设有限公司 | Pipeline pressure measuring device |
| CN113324839A (en) * | 2021-05-28 | 2021-08-31 | 福州城建设计硏究院有限公司 | Pressure test method, device and system for short pipe and pipeline with wing ring |
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| CN107884141A (en) * | 2017-11-08 | 2018-04-06 | 浙江凯晨工贸有限公司 | A kind of butterfly valve air-tightness automatic detection device |
| CN111122302A (en) * | 2019-12-20 | 2020-05-08 | 上海绿地建设(集团)有限公司 | Pressing balancing device for buried socket water supply pipe |
| CN111982696A (en) * | 2020-08-28 | 2020-11-24 | 江西勃尧建设有限公司 | Pipeline pressure measuring device |
| CN113324839A (en) * | 2021-05-28 | 2021-08-31 | 福州城建设计硏究院有限公司 | Pressure test method, device and system for short pipe and pipeline with wing ring |
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Application publication date: 20160824 |