CN109163862B - Pressure testing method for pipe fitting - Google Patents
Pressure testing method for pipe fitting Download PDFInfo
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- CN109163862B CN109163862B CN201810928077.3A CN201810928077A CN109163862B CN 109163862 B CN109163862 B CN 109163862B CN 201810928077 A CN201810928077 A CN 201810928077A CN 109163862 B CN109163862 B CN 109163862B
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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
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a pressure test method of a pipe fitting, which is particularly suitable for a pipe without a pipe joint.A used pressure test device comprises a T-shaped groove butt-welded pipe pressure test platform and a pipe clamping device, when the pressure test device works, movable gears are placed on the left side and the right side of the pressure test pipe fitting, and an adjusting rod penetrates through a long-strip-shaped hole in a fixed plate and is in threaded connection with a sliding block; the end part of the pressure test pipe fitting is sequentially provided with the gasket, the pressure test blind plate and the I-shaped steel, so that the tail end of the adjusting rod is contacted with the I-shaped steel.
Description
Technical Field
The invention relates to the field of pipeline construction, in particular to a pressure test method for a pipe fitting.
Background
The oil drilling platform tends to be a special marine manufacturing device, the requirement on hydraulic stainless steel pipes is high, most pipelines are in a butt welding connection mode, so a key process in pipeline construction is used as one of main means for checking pipeline welding quality and pipes, whether the welding quality and the pipeline material quality meet the design requirement or not and whether unsafe other factors exist or not are mainly verified, and the key process is a previous key process before the pipeline is put into production and runs.
According to the classification society standard, after the butt welding pipe is prefabricated in a workshop, a pressure test with 1.5 times of design pressure is needed to test the quality of the welding seam as a flange pipe. Due to the fact that the pipe diameters are different, the materials are different, the pressure grades are different, and the safety coefficient of the existing butt-welded pipe pressure testing method is low.
The existing pressure test method for the butt welded pipe has the following defects: (1) the safety is poor, the original process adopts a Noma pipeline connector, the accessory is used as a tool, and a plurality of pipelines are connected together by the accessory to carry out pressure test. Because no effective actual fixing device is provided, the accessories can break loose from the pipeline in the pressure testing process along with the rise of pressure, and the safety of constructors can be ensured only by correct fixing, so that the safety of the whole pressure testing construction is ensured; (2) the material and labor hour are wasted, a part of tooling parts are welded in the old process, the process is to make a pipe 50mm long, a part of tooling parts with flanges for pipelines are welded at the tail end, all pipelines are connected and similar to the pressure test of the flange pipelines, and after the pressure test is finished, the whole pipeline is sent back to a workshop to polish and polish the redundant pipe tooling parts and then send out for galvanizing; (3) the pressure test efficiency is low, because the end ports of the butt-welded pipes cannot be kept on the same straight line when being connected with the connector, the inclined angles with different degrees are formed, so that the uniform stress cannot be ensured when the bolts are tightened, the connector is required to be adjusted repeatedly to ensure the tightness when water leaks from the joint during the pressure test, the pressure test efficiency is low, and the time of welding seams at one position of the pressure test is 3 times of the time of testing a pair of flanges; (4) the operation rules are complicated, and the pipeline pressure test belongs to high-risk operation. In the pressure test construction of the pipeline, if the regulation and the system are not strictly executed, the details of safe construction are not emphasized, the working wind is not strict, and the direct reasons of accidents are often caused. The large flange piece screw is smaller than the pressure testing equipment, and the safety of constructors can be ensured only by carrying out safety operation strictly according to operation rules, so that the safety of the whole pressure testing construction is ensured.
Disclosure of Invention
The invention aims to solve the technical problem of providing a pressure test method for a pipe fitting, and solves the problems of complicated operation procedures, material waste, labor hour waste, low efficiency, poor safety and the like in the prior art.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a pressure test method of a pipe fitting, a pressure test device used by the pressure test method comprises a T-shaped groove butt-welded pipe pressure test platform and a pipe clamping device, wherein the T-shaped groove butt-welded pipe pressure test platform comprises 4 cylindrical supports and a bottom plate welded and installed above the cylindrical supports, a plurality of T-shaped strip plates are welded on the bottom plate, a T-shaped groove is formed between the two T-shaped strip plates, a plurality of oval over-welding holes are uniformly machined in the T-shaped strip plates, baffle plates are welded below the peripheral edges of the bottom plate, and triangular base plates are welded at the lower ends of the cylindrical supports; the pipe clamping device comprises a movable gear, an adjusting rod and a T-shaped block, wherein a round hole is formed above the T-shaped block, the movable gear is formed by welding a sliding bottom plate, a fixed plate and a triangular baffle plate, the front end and the rear end above the sliding bottom plate are respectively welded with the triangular baffle plate, the fixed plate is welded on one side of the left side and the right side above the sliding bottom plate, a bolt hole is formed in the sliding bottom plate, and a strip-shaped hole is formed in the middle of the fixed plate; the T-shaped block is arranged in the T-shaped groove, the sliding bottom plate of the movable gear and the T-shaped block are connected through a bolt and a nut, the movable gear is arranged on the left side and the right side of the pressure test pipe fitting during working, the fixed plate of the movable gear is close to the pressure test pipe fitting, and the adjusting rod penetrates through the elongated hole in the fixed plate and is in threaded connection with the sliding block; the end part of the pressure test pipe fitting is sequentially provided with a gasket, a pressure test blind plate and I-shaped steel, so that the tail end of the adjusting rod is contacted with the I-shaped steel, the pressure test blind plate is provided with a clamping sleeve joint, the clamping sleeve joint receives water through a hose to exhaust, and the concrete pressure test method comprises the following steps:
s1, cleaning the T-shaped groove butt-welded pipe pressure test platform, smearing butter on the platform in advance, and placing a cushion block to a proper position in advance according to the length of a butt-welded pipe pressure test pipe;
s2, placing the pressure test pipe fitting on a cushion block;
s3, placing the T-shaped block into the T-shaped groove, placing a movable gear on the left end of the pressure-tested pipe fitting, keeping the movable gear at the middle position of two sides of the pipe fitting, penetrating a bolt through a bolt hole of the sliding bottom plate and a bolt hole on the T-shaped block, and locking a nut;
s4, adjusting the slide block to the center position of the pressure test pipe fitting according to the height of the pipe fitting, and enabling the adjusting rod to penetrate through the elongated hole in the fixing plate to be in threaded connection with the slide block;
s5, sequentially mounting a gasket, a pressure test blind plate and I-shaped steel at the end part of the pressure test pipe fitting, and enabling the tail end of the adjusting rod to be in contact with the I-shaped steel;
s6, installing the right parts according to the left installation step, and adjusting the right adjusting rod until the right adjusting rod cannot move;
s7, tightening a bolt and a nut at the bottom, and finely adjusting the size of the movable quantity through adjusting rods at two sides if the movable quantity exists;
and S8, beginning formal pressure test, injecting water through the right ferrule joint hose, filling water and exhausting, and performing a left-side tightness test, wherein the pressure of the pressure test is 1.5 times of the design pressure.
Preferably, the gasket is made of butadiene-acrylonitrile rubber and is tightly attached to the pressure test blind plate and the pressure test pipe fitting.
As preferred, set up the cushion between the boss in pipe fitting and T type groove, the cushion is semi-circular wood, plays the effect of fixed pipe fitting.
Preferably, the I-steel is made of carbon steel, and the pressure test blind plate is made of carbon steel.
Preferably, the pressure test pipe fitting is a single hydraulic stainless steel pipeline.
The pressure test method has the advantages that: the operation procedures are simple, and the pressure test can be completed only by matching the blind flange and the gasket which are suitable for the pipeline under the existing conditions of the platform, so that the problems of material waste, labor hour waste and low efficiency are solved; the device has high safety factor, the platform replaces a Noma pipeline connector for connection, the fixing effect is more reliable, the device skillfully uses the movable baffle, can be flexibly used on a pressure test platform, the movable baffle can completely overcome the axial force and the longitudinal force generated in the pressure test process of the pipe, in addition, the movable baffle is arranged in the direction of the elbow of the pipe, so that the pipe is not easy to break loose from the platform in the pressure test process of the pipe more effectively, and the device of the compression screw rod effectively plays a role in adjusting the length in the axial direction and the longitudinal direction; the platform mainly adopts a T-shaped groove, the upper welding holes can play roles of positioning and reducing weight, the precision is higher, the gap is adjustable, the gap is adjusted by an axially movable baffle in the T-shaped groove of the platform, and the bearing capacity is high.
Drawings
FIG. 1 is a schematic representation of the steps of a pressure testing method of the present invention;
FIG. 2 is a schematic structural view of a pressure testing tool;
FIG. 3 is a side view of a pressure testing tool;
FIG. 4 is a top view of the pressure testing tool;
FIG. 5 is a top view of the pressure testing platform;
fig. 6 is a front view of the pressure testing platform.
Wherein: 1. a sliding bottom plate; 2. a bolt; 3. a nut; 4. an adjusting lever; 5. a triangular baffle plate; 6. a fixing plate; 7. i-shaped steel; 8. a gasket; 9. a pressure test blind plate; 10. a ferrule fitting; 11. a T-shaped groove; 12. a base plate; 13. cylindrical support; 14. cushion blocks; 15. a T-shaped block; 16. testing the pressure of the pipe; 17. a slider; 18. t-shaped laths; 19. a baffle plate; 20. triangular backing plate.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, unless otherwise specified and limited, it is to be understood that the terms "mounted," "connected," and "connected" are used broadly and can be, for example, mechanically or electrically connected, or can be internal to two elements, directly connected, or indirectly connected through an intermediate medium. The specific meaning of the above terms can be understood by those of ordinary skill in the art as appropriate.
The pressure testing method of the pipe fitting of the embodiment of the invention described with reference to fig. 1 to 6 comprises a pressure testing device of a T-shaped groove butt welded pipe and a pipe clamping device, wherein the pressure testing device used in the pressure testing method comprises a T-shaped groove butt welded pipe pressure testing platform and a pipe clamping device, the T-shaped groove butt welded pipe pressure testing platform comprises 4 cylindrical supports 13 and a bottom plate 12 welded and installed above the cylindrical supports 13, a plurality of T-shaped strip plates 18 are welded on the bottom plate 12, a T-shaped groove 11 is formed between the two T-shaped strip plates 18, a plurality of elliptical over-welding holes are uniformly processed on the T-shaped strip plates 18, baffle plates 19 are welded below the peripheral edge of the bottom plate 12, and a triangular base plate 20 is welded at the lower end of the cylindrical supports 13; the pipe clamping device comprises a movable gear, an adjusting rod 4 and a T-shaped block 15, a round hole is formed above the T-shaped block 15, the movable gear is formed by welding a sliding bottom plate 1, a fixing plate 6 and a triangular baffle plate 5, the triangular baffle plates 5 are respectively welded at the front end and the rear end above the sliding bottom plate 1, the fixing plate 6 is welded at one side of the left side and the right side above the sliding bottom plate 1, a bolt hole is formed in the sliding bottom plate 1, and a strip-shaped hole is formed in the middle of the fixing plate 6; the T-shaped block 15 is arranged in the T-shaped groove 11, the sliding bottom plate 1 of the movable gear and the T-shaped block 15 are connected through the bolt 2 and the nut 3, the movable gear is arranged on the left side and the right side of the pressure test pipe 16 during working, the fixing plate 6 of the movable gear is close to the pressure test pipe 16, and the adjusting rod 4 penetrates through a long-strip-shaped hole in the fixing plate 6 and is in threaded connection with the sliding block 17; the end part of the pressure test pipe 26 is sequentially provided with a gasket 8, a pressure test blind plate 9 and an I-shaped steel 7, so that the tail end of the adjusting rod 4 is contacted with the I-shaped steel 7, the pressure test blind plate 9 is provided with a clamping sleeve joint 10, the clamping sleeve joint 10 receives water through a hose to exhaust, and the specific pressure test method comprises the following steps:
s1, cleaning the T-shaped groove butt-welded pipe pressure test platform, smearing butter on the platform in advance, and placing the cushion block 14 in a proper position in advance according to the length of the butt-welded pipe pressure test pipe fitting 16;
s2, placing the pressure test pipe fitting 16 on the cushion block 14;
s3, placing the T-shaped block 15 into the T-shaped groove 11, placing a movable gear on the left end of the pressure test pipe fitting 16, keeping the movable gear at the middle position of two sides of the pipe fitting 16, penetrating the bolt 2 through the bolt hole of the sliding bottom plate 1 and the bolt hole on the T-shaped block 15, and locking the nut 3;
s4, adjusting the slide block 17 to the central position of the pressure test pipe 16 according to the height of the pipe 16, and connecting the adjusting rod 4 with the slide block 17 through the elongated hole of the fixing plate 6 in a threaded manner;
s5, sequentially mounting a gasket 8, a pressure test blind plate 9 and an I-shaped steel 7 on the end part of the pressure test pipe fitting 16, and enabling the tail end of the adjusting rod 4 to be in contact with the I-shaped steel 7;
s6, installing the right parts according to the left installation step, and adjusting the right adjusting rod 4 until the right adjusting rod cannot move;
s7, tightening the bolt 2 and the nut 3 at the bottom, and finely adjusting the size through the adjusting rods 4 at the two sides if the movement amount exists;
and S8, beginning formal pressure test, injecting water through the right ferrule connector 10 hose, filling water and exhausting, and performing a left-side tightness test, wherein the pressure of the pressure test is 1.5 times of the design pressure.
Preferably, the gasket 8 is made of nitrile rubber, and is tightly attached to the pressure test blind 9 plate and the pressure test pipe 16.
Preferably, a cushion block 14 is arranged between the pipe 16 and the boss of the T-shaped groove 11, and the cushion block 14 is made of semicircular wood and plays a role of fixing the pipe 16.
Preferably, the I-shaped steel 7 is made of carbon steel, and the pressure test blind plate 9 is made of carbon steel.
Preferably, the pressure test tube 16 is a single hydraulic stainless steel line.
The pressure testing device has the advantages that: the operation procedures are simple, and the pressure test can be completed only by matching the blind flange and the gasket which are suitable for the pipeline under the existing conditions of the platform, so that the problems of material waste, labor hour waste and low efficiency are solved; the device has high safety factor, the platform replaces a Noma pipeline connector for connection, the fixing effect is more reliable, the device skillfully uses the movable baffle, can be flexibly used on a pressure test platform, the movable baffle can completely overcome the axial force and the longitudinal force generated in the pressure test process of the pipe, in addition, the movable baffle is arranged in the direction of the elbow of the pipe, so that the pipe is not easy to break loose from the platform in the pressure test process of the pipe more effectively, and the device of the compression screw rod effectively plays a role in adjusting the length in the axial direction and the longitudinal direction; the platform mainly adopts a T-shaped groove, the upper welding holes can play roles of positioning and reducing weight, the precision is higher, the gap is adjustable, the gap is adjusted by an axially movable baffle in the T-shaped groove of the platform, and the bearing capacity is high.
In the description herein, references to the description of "one embodiment," "an example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (5)
1. A pressure test method of a pipe fitting is characterized in that: the pressure testing device used by the pressure testing method comprises a T-shaped groove butt-welded pipe pressure testing platform and a pipe clamping device, wherein the T-shaped groove butt-welded pipe pressure testing platform comprises 4 cylindrical supports and a bottom plate which is welded and installed above the cylindrical supports, a plurality of T-shaped battens are welded on the bottom plate, a T-shaped groove is formed between the two T-shaped battens, a plurality of oval over-welding holes are uniformly machined in the T-shaped battens, baffles are welded below the peripheral edges of the bottom plate, and a triangular base plate is welded at the lower end of each cylindrical support; the pipe clamping device comprises a movable gear, an adjusting rod and a T-shaped block, wherein a bolt hole is formed above the T-shaped block, the movable gear is formed by welding a sliding bottom plate, a fixed plate and a triangular baffle plate, the front end and the rear end above the sliding bottom plate are respectively welded with the triangular baffle plate, the fixed plate is welded on one side of the left side and the right side above the sliding bottom plate, the sliding bottom plate is provided with the bolt hole, and the middle part of the fixed plate is provided with a strip-shaped hole; the T-shaped block is arranged in the T-shaped groove, the sliding bottom plate of the movable gear and the T-shaped block are connected through a bolt and a nut, the movable gear is arranged on the left side and the right side of the pressure test pipe fitting during working, the fixed plate of the movable gear is close to the pressure test pipe fitting, and the adjusting rod penetrates through the elongated hole in the fixed plate and is in threaded connection with the sliding block; the end part of the pressure test pipe fitting is sequentially provided with a gasket, a pressure test blind plate and I-shaped steel, so that the tail end of the adjusting rod is contacted with the I-shaped steel, the pressure test blind plate is provided with a clamping sleeve joint, the clamping sleeve joint receives water through a hose to exhaust, and the concrete pressure test method comprises the following steps:
s1, cleaning the T-shaped groove butt-welded pipe pressure test platform, smearing butter on the platform in advance, and placing a cushion block to a proper position in advance according to the length of a pressure test pipe;
s2, placing the pressure test pipe fitting on a cushion block;
s3, placing the T-shaped block into the T-shaped groove, placing a movable gear at the left end of the pressure-tested pipe fitting, keeping the movable gear at the middle positions of two sides of the pressure-tested pipe fitting, penetrating a bolt through a bolt hole of the sliding bottom plate and a bolt hole on the T-shaped block, and locking a nut;
s4, adjusting the slide block to the center position of the pressure test pipe fitting according to the height of the pressure test pipe fitting, and enabling the adjusting rod to penetrate through the elongated hole in the fixing plate to be in threaded connection with the slide block;
s5, sequentially mounting a gasket, a pressure test blind plate and I-shaped steel at the end part of the pressure test pipe fitting, and enabling the tail end of the adjusting rod to be in contact with the I-shaped steel;
s6, installing the right parts according to the left installation step, and adjusting the right adjusting rod until the right adjusting rod cannot move;
s7, tightening a bolt and a nut at the bottom, and finely adjusting the size of the movable quantity through adjusting rods at two sides if the movable quantity exists;
and S8, beginning formal pressure test, injecting water through the sleeve joint hose on the right side, filling the water and exhausting, and then performing an air tightness test, wherein the pressure of the pressure test is 1.5 times of the design pressure.
2. The pressure testing method according to claim 1, wherein the gasket is made of nitrile rubber and is tightly attached to the pressure testing blind plate and the pressure testing pipe fitting.
3. The pressure testing method according to claim 1, wherein a cushion block is arranged between the pressure testing pipe and the boss of the T-shaped groove, and the cushion block is made of semicircular wood and plays a role in fixing the pressure testing pipe.
4. The pressure testing method according to claim 1, wherein the i-steel is made of carbon steel, and the pressure testing blind plate is made of carbon steel.
5. The method of pressure testing of claim 1, wherein the pipe under pressure is a single hydraulic stainless steel line.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810928077.3A CN109163862B (en) | 2018-08-15 | 2018-08-15 | Pressure testing method for pipe fitting |
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| CN201810928077.3A CN109163862B (en) | 2018-08-15 | 2018-08-15 | Pressure testing method for pipe fitting |
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| CN109163862A CN109163862A (en) | 2019-01-08 |
| CN109163862B true CN109163862B (en) | 2022-04-01 |
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| CN109655217A (en) * | 2019-02-12 | 2019-04-19 | 天津城建大学 | A kind of beam test beam end support |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CA2950142C (en) * | 2008-08-15 | 2018-11-27 | Securus, Inc. | Pressure testing method and apparatus |
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| CN104062085A (en) * | 2013-03-21 | 2014-09-24 | 中国石油天然气集团公司 | Pressure testing apparatus of pipeline blocking valve |
| CN203551274U (en) * | 2013-11-25 | 2014-04-16 | 中国西电电气股份有限公司 | Operating platform tool used for component hydraulic pressure test |
| CN204302107U (en) * | 2014-12-25 | 2015-04-29 | 安源管道实业有限公司 | The pressure testing device of inspection tubing and bend pipe tools |
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Effective date of registration: 20230112 Address after: 226100 No. 1, Xin'anjiang Road, Binjiang street, Haimen District, Nantong City, Jiangsu Province Patentee after: CHINA MERCHANTS HEAVY INDUSTRY (JIANGSU) Co.,Ltd. Patentee after: China Merchants Jinling shipping (Nanjing) Co.,Ltd. Address before: 226100 Xin'anjiang Road, Binjiang Street, Haimen City, Nantong City, Jiangsu Province Patentee before: CHINA MERCHANTS HEAVY INDUSTRY (JIANGSU) Co.,Ltd. |