CN112683681B - A water pressure test machine for steel pipe resistance to compression detects - Google Patents
A water pressure test machine for steel pipe resistance to compression detects Download PDFInfo
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- CN112683681B CN112683681B CN202011391561.0A CN202011391561A CN112683681B CN 112683681 B CN112683681 B CN 112683681B CN 202011391561 A CN202011391561 A CN 202011391561A CN 112683681 B CN112683681 B CN 112683681B
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- 238000012360 testing method Methods 0.000 title claims abstract description 126
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 51
- 239000010959 steel Substances 0.000 title claims abstract description 51
- 230000006835 compression Effects 0.000 title claims abstract description 8
- 238000007906 compression Methods 0.000 title claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 8
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 229920001971 elastomer Polymers 0.000 claims description 35
- 210000001503 joint Anatomy 0.000 claims description 28
- 230000000694 effects Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 8
- 238000011161 development Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000002706 hydrostatic effect Effects 0.000 description 4
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
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Abstract
The invention discloses a water pressure testing machine for steel pipe compression resistance detection, and in particular relates to the field of steel pipe detection equipment. The invention ensures the sealing performance of the steel pipe in the testing process, avoids the phenomenon of leakage of the sealing end surface, is applicable to testing steel pipes with different specifications, has simple and convenient operation, improves the practicability and brings better development prospect.
Description
Technical Field
The invention relates to the field of steel pipe detection equipment, in particular to a hydraulic pressure testing machine for steel pipe compression resistance detection.
Background
For producing large-caliber submerged-arc welding spiral pipes, the submerged-arc welding straight-seam pipes are required to be subjected to hydrostatic test according to the hydrostatic test of the standard 9.4 of the American Petroleum institute APISP, and leakage phenomenon cannot occur. The hydrostatic test process of the welded steel pipe is as follows: and (3) applying a certain pretightening force to the main oil cylinder, sealing the two end surfaces of the welded pipe, filling low-pressure water into the welded pipe, discharging air in the pipe, pressurizing, maintaining the pressure for a certain time, and unloading to finish the hydrostatic test of the welded pipe. When the large-diameter steel pipe is subjected to hydraulic pressure test in the country outside nineties of the last century, polyurethane is used as a sealing material, and inner radial or outer radial sealing is adopted, so that the radial sealing hydraulic press has the advantages of multiple varieties of test heads, high manufacturing cost, short service life of rubber rings and frequent faults. With the improvement of the quality of the domestic polyurethane materials, an end face sealing structure is generally required to be adopted, and the device has the advantages of simple and convenient sealing ring replacement, no need of frequently replacing the test head of the hydraulic testing machine, time saving and the like, but when the hydraulic testing machine with a large diameter tests the pressure of the small-caliber steel pipe, the phenomenon of sealing end face leakage can occur.
Disclosure of Invention
In order to achieve the above purpose, the present invention provides the following technical solutions: the hydraulic pressure testing machine for the steel pipe compression resistance detection comprises a control box, a testing frame positioned on one side of the control box, a fixed testing head arranged on the testing frame and a testing moving head movably connected with the fixed testing head, wherein a bottom rod extending outwards is arranged at the bottom of the testing frame, a movable sleeve is sleeved outside the other end of the bottom rod, the testing moving head is fixedly arranged on the sleeve, two opposite connection pipes are arranged on the fixed testing head and the moving testing head, openings of the two opposite connection pipes are oppositely arranged and sleeved at two ends of the testing steel pipe during hydraulic pressure testing, a plurality of layers of stacked rubber gaskets are arranged in the two opposite connection pipes, through holes are formed in the plurality of layers of rubber gaskets, a gap is reserved between the testing steel pipe and the opposite connection pipes, and a clamping pipe fitting for sealing is inserted in the gap;
The fixed test head and the movable test head comprise a frame plate, an abutting plate, a connecting rod and an air cylinder, wherein the frame plate is fixedly arranged on the test frame, the connecting rod is connected between the frame plate and the abutting plate, and the air cylinder is fixedly arranged on the frame plate;
the upper part of the fixed test head is also provided with a booster pump arranged on the connecting rod, the output end of the booster pump is communicated with the inside of a butt joint pipe in the fixed test head through a pipeline, and the connecting rod in the movable test head is fixedly connected with the sleeve;
the diameters of the through holes on the multi-layer rubber gaskets decrease from outside to inside in sequence, and the diameters of the rubber gaskets are 1-2cm;
During testing, the distance between the two fixed test heads and the test moving head is adjusted, two ends of the test steel pipe are butted inside the butted pipes on the two test heads, the ends of the test steel pipe are butted on the rubber gaskets, the air cylinders push the connectors to enable the butted pipes on the two sides to move relatively, and the test steel pipe in the middle is extruded;
The clamping pipe fitting comprises a clamping pipe and a clamping inner pipe fixed at the end part of the clamping pipe, the outer wall of the clamping inner pipe is movably connected with the inner wall of the butt joint pipe through threads, the number of the clamping inner pipes is multiple, the outer diameter of the clamping inner pipe is the same as the diameter of the through hole in the rubber gasket, and the inner diameter of the clamping inner pipe is the same as the outer diameter of the test steel pipe.
In a preferred embodiment, the bottom rod is further fixedly provided with a hydraulic push rod, two ends of the hydraulic push rod are respectively connected with two butt joint plates through rod bodies, and a telescopic rod is further connected between the two butt joint plates.
The invention has the technical effects and advantages that:
In the testing process of steel pipes with different specifications, the sealing end faces of the steel pipes are sealed by the multi-layer rubber gaskets matched with the clamping pipe fitting, so that the sealing performance of the steel pipes in the testing process is ensured, the phenomenon of leakage of the sealing end faces is avoided, the steel pipes with different specifications can be tested, the operation is simple and convenient, the practicability is improved, and a better development prospect is brought.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present invention.
Fig. 2 is a schematic diagram showing the detailed structure of fig. 1a according to the present invention.
Fig. 3 is a schematic structural diagram of a portion of a bayonet fitting according to another embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a portion of a bayonet fitting according to another embodiment of the present invention.
The reference numerals are: the device comprises a control box 1, a test rack 2, a fixed test head 3, a test moving head 4, a bottom rod 5, a sleeve pipe 6, a butt joint pipe 7, a rubber gasket 8, a through hole 9, a clamping pipe fitting 10, a frame plate 11, a butt joint plate 12, a connecting rod 13, a cylinder 14, a connector 15, a booster pump 16, a hydraulic push rod 17, a telescopic rod 18, an inner pipe 19 and a clamping pipe 20.
Description of the embodiments
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The hydraulic pressure testing machine for steel pipe compression resistance detection comprises a control box 1, a testing machine frame 2 positioned on one side of the control box 1, a fixed testing head 3 arranged on the testing machine frame 2 and a testing moving head 4 movably connected with the fixed testing head 3, wherein a bottom rod 5 extending outwards is arranged at the bottom of the testing machine frame 2, a movable sleeve 6 is sleeved outside the other end of the bottom rod 5, the testing moving head 4 is fixedly arranged on the sleeve 6, the testing moving head 4 moves left and right on the bottom rod 5 through the sleeve 6 in the testing process, and the distance between the testing moving head 4 and a bracket of the fixed testing head 3 is adjusted, so that the hydraulic pressure testing machine is suitable for testing steel pipes with different lengths;
The fixed test head 3 and the test moving head 4 are respectively provided with a butt joint pipe 7, and the openings of the two butt joint pipes 7 are oppositely arranged and sleeved at two ends of the test steel pipe during water pressure test;
Further, as the test steel pipes have different diameters, a plurality of layers of rubber gaskets 8 are respectively arranged in the butt joint pipe 7 according to the diameter specification of the test steel pipes, and through holes 9 are formed in the rubber gaskets 8, so that the through holes 9 on the plurality of layers of rubber gaskets 8 are gradually decreased from outside to inside, and the diameter of each through hole on each layer of rubber gasket corresponds to the diameter of the test steel pipe with one specification;
during testing, the distance between the two test heads is adjusted, two ends of the test steel pipe are butted inside the butted pipe 7 on the two test heads, and the ends of the test steel pipe are butted on the rubber gasket 8;
Because the diameter of the through hole 9 is matched with the diameter of the test steel pipe, the rubber gasket 8 wraps the end part of the test steel pipe and seals the end part;
The diameter of the rubber gasket 8 is 1-2cm, so that the rubber gasket 8 is ensured to have enough thickness, and the rubber gasket cannot deform in the extrusion process to cause the sealing effect to be unavailable;
A gap is reserved between the test steel pipe and the butt joint pipe 7, a clamping pipe fitting 10 for sealing is inserted in the gap, and the clamping pipe fitting 10 is used for carrying out auxiliary sealing on the connection between the test steel pipe and the butt joint pipe 7, so that the tightness of the connection in the test process is ensured;
The fixed test head 3 and the movable test head comprise a frame plate 11, an abutting plate 12, a connecting rod 13 and an air cylinder 14, wherein the frame plate 11 is fixedly arranged on the test frame 2, the connecting rod 13 is connected between the frame plate 11 and the abutting plate 12, the air cylinder 14 is fixedly arranged on the frame plate 11, the abutting pipe 7 is fixedly inserted on the abutting plate 12, a connector 15 is fixedly arranged at one end, close to the frame plate 11, of the abutting pipe 7, and an output shaft of the air cylinder 14 penetrates through the frame plate 11 and is in transmission connection with the connector 15;
on the basis of the above, after the test steel pipe is installed, the cylinder 14 is controlled to work, the connector 15 is pushed to enable the butt joint pipes 7 on two sides to relatively move, the test steel pipe in the middle is extruded, and the end part of the test steel pipe is tightly sealed with the multi-layer rubber gasket 8;
a booster pump 16 arranged on the connecting rod 13 is further arranged above the fixed test head 3, the output end of the booster pump 16 is communicated with the inside of the butt joint pipe 7 in the fixed test head 3 through a pipeline, and the connecting rod 13 in the movable test head is fixedly connected with the sleeve 6;
The bottom rod 5 is fixedly provided with a hydraulic push rod 17, two ends of the hydraulic push rod 17 are respectively connected with two butt joint plates 12 through rod bodies, a telescopic rod 18 is further connected between the two butt joint plates 12, the hydraulic push rod 17 works to adjust the distance between the fixed test head 3 and the movable test head, and the telescopic rod 18 limits the movement of the two test heads and prevents the two test heads from shaking in the test process;
As shown in fig. 2, the clamping pipe fitting 10 includes a clamping pipe 20 and a clamping inner pipe 19 fixed at the end part of the clamping pipe, the positions, where the outer wall of the clamping inner pipe 19 is attached to the inner wall of the butt joint pipe 7, are movably connected through threads, the number of the clamping inner pipes 19 is one, the outer diameter of the clamping inner pipe 19 is the same as the diameter of the through hole 9 on the rubber gasket 8, and the inner diameter of the clamping inner pipe 19 is the same as the outer diameter of the test steel pipe;
On the basis of the above, the end part of the clamping pipe 20 is abutted against the outermost rubber gasket 8, and the clamping pipe 20 is rotated to move towards the inner side of the butt joint pipe 7, so that the clamping inner pipe 19 is abutted against the rubber gasket 8 attached to the outer wall of the test steel pipe, the tightness of the pipe is improved, and the leakage of air and water is prevented;
In another embodiment of the present invention, as shown in fig. 2-3, the number of the inner clamping pipes 19 is two, because the diameters of the test steel pipes are different, so that the number of the inner clamping pipes 19 is different;
On the basis of the above, the end part of the clamping tube 20 is abutted against the outermost rubber gasket 8, the first clamping inner tube 19 is abutted against the second rubber gasket 8 inside, and the innermost clamping inner tube 19 is abutted against the rubber gasket 8 attached to the outer wall of the test steel tube;
in yet another embodiment of the present invention, as shown in fig. 2 and 4, the number of the inner clamping tubes 19 is three;
on the basis of the above, the end of the clamping tube 20 is abutted against the outermost rubber gasket 8, the first clamping inner tube 19 is abutted against the second inner rubber gasket 8, the second inner third rubber gasket 8, and the innermost clamping inner tube 19 is abutted against the rubber gasket 8 attached to the outer wall of the test steel tube.
The last points to be described are: first, in the description of the present application, it should be noted that, unless otherwise specified and defined, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be mechanical or electrical, or may be a direct connection between two elements, and "upper," "lower," "left," "right," etc. are merely used to indicate relative positional relationships, which may be changed when the absolute position of the object being described is changed;
Secondly: in the drawings of the disclosed embodiments, only the structures related to the embodiments of the present disclosure are referred to, and other structures can refer to the common design, so that the same embodiment and different embodiments of the present disclosure can be combined with each other under the condition of no conflict;
Finally: the foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (2)
1. The utility model provides a water pressure test machine for steel pipe resistance to compression detects, includes the control box, is located the test frame of control box one side, installs fixed test head and the test mobile head with fixed test head swing joint in the test frame, installs the sill bar that extends to the outside in test frame bottom, is equipped with the sleeve pipe of activity at the outside cover of the other end of sill bar, test mobile head fixed mounting on the sleeve pipe, its characterized in that: the fixed test head and the movable test head are respectively provided with a butt joint pipe, the openings of the two butt joint pipes are arranged oppositely and sleeved at two ends of the test steel pipe during water pressure test, a plurality of layers of stacked rubber gaskets are arranged in the two butt joint pipes, through holes are formed in the plurality of layers of rubber gaskets, a gap is reserved between the test steel pipe and the butt joint pipe, and a clamping pipe fitting for sealing is inserted in the gap;
The fixed test head and the movable test head comprise a frame plate, an abutting plate, a connecting rod and an air cylinder, wherein the frame plate is fixedly arranged on the test frame, the connecting rod is connected between the frame plate and the abutting plate, and the air cylinder is fixedly arranged on the frame plate;
the upper part of the fixed test head is also provided with a booster pump arranged on the connecting rod, the output end of the booster pump is communicated with the inside of a butt joint pipe in the fixed test head through a pipeline, and the connecting rod in the movable test head is fixedly connected with the sleeve;
The butt joint pipe is fixedly inserted on the butt joint plate, a connector is fixedly arranged at one end of the butt joint pipe, which is close to the frame plate, and the output shaft of the air cylinder penetrates through the frame plate to be in transmission connection with the connector;
the diameters of the through holes on the multi-layer rubber gaskets decrease from outside to inside in sequence, and the diameter of each through hole on each layer of rubber gasket corresponds to the diameter of a test steel pipe with one specification;
During testing, the distance between the two fixed test heads and the test moving head is adjusted, two ends of the test steel pipe are butted inside the butted pipes on the two test heads, the ends of the test steel pipe are butted on the rubber gaskets, the air cylinders push the connectors to enable the butted pipes on the two sides to move relatively, and the test steel pipe in the middle is extruded;
The clamping pipe fitting comprises a clamping pipe and a clamping inner pipe fixed at the end part of the clamping pipe, the outer wall of the clamping inner pipe is movably connected with the inner wall of the butt joint pipe through threads, the number of the clamping inner pipes is multiple, the outer diameter of the clamping inner pipe is the same as the diameter of the through hole in the rubber gasket, and the inner diameter of the clamping inner pipe is the same as the outer diameter of the test steel pipe.
2. A hydraulic tester for steel pipe compression detection according to claim 1, characterized in that: the bottom rod is fixedly provided with a hydraulic push rod, two ends of the hydraulic push rod are respectively connected with two butt joint plates through rod bodies, and a telescopic rod is further connected between the two butt joint plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011391561.0A CN112683681B (en) | 2020-12-02 | 2020-12-02 | A water pressure test machine for steel pipe resistance to compression detects |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011391561.0A CN112683681B (en) | 2020-12-02 | 2020-12-02 | A water pressure test machine for steel pipe resistance to compression detects |
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| Publication Number | Publication Date |
|---|---|
| CN112683681A CN112683681A (en) | 2021-04-20 |
| CN112683681B true CN112683681B (en) | 2024-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011391561.0A Active CN112683681B (en) | 2020-12-02 | 2020-12-02 | A water pressure test machine for steel pipe resistance to compression detects |
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-
2020
- 2020-12-02 CN CN202011391561.0A patent/CN112683681B/en active Active
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