CN212254900U - Rubber expansion joint hydrostatic test blind plate force resisting device - Google Patents
Rubber expansion joint hydrostatic test blind plate force resisting device Download PDFInfo
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- CN212254900U CN212254900U CN202020732309.0U CN202020732309U CN212254900U CN 212254900 U CN212254900 U CN 212254900U CN 202020732309 U CN202020732309 U CN 202020732309U CN 212254900 U CN212254900 U CN 212254900U
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Abstract
A rubber expansion joint hydraulic test blind plate force resisting device comprises a test plug plate and blind plate force resisting columns, wherein flange plates of the blind plate force resisting columns are arranged at two ends of each blind plate force resisting column, and a rubber sealing gasket, an adjusting flange plate, a rubber sealing gasket, a flange plate B, a test plug plate, a flange plate A, a rubber sealing gasket and a threaded cap are sequentially arranged on the outer side of the flange plate of each blind plate force resisting column from inside to outside; the middle part of the blind plate resisting force column is also sleeved with a test rubber expansion joint, and flanges at two ends of the test rubber expansion joint are fastened with a test plugging plate through a plurality of bolts, gaskets and nuts; and lip-tooth-shaped annular sealing gaskets are arranged on the circumferences of inner holes at two ends of the test rubber expansion joint. The utility model discloses processing technology and simple structure, application scope is big, greatly reduced manufacturing cost, reduced installation intensity of labour, improved work efficiency, experimental qualification rate can reach more than 95%.
Description
Technical Field
The utility model relates to a rubber expansion joint technical field especially relates to an anti blind plate power device of rubber expansion joint water pressure test.
Background
The rubber expansion joint is used as a nonmetal compensator and widely applied to various pipeline systems in various industries, and due to the complex processing technology of rubber high polymer materials, the quality difference and the discreteness of the rubber expansion joints produced by different manufacturing technologies are large, so that in order to ensure the quality of rubber expansion joint products, no matter the rubber expansion joint products are standard (domestic or international) or customer requirements, and factory or type tests, the hydraulic test requirement of 1.5 times of design pressure is required, corresponding test blocking plates (also called test blind plates) need to be designed for the rubber expansion joints of each specification type and each pressure grade, and the rubber expansion joints (such as DN500 and PN10 below) with low pressure grade and small specification type can be completed without complex processing and manufacturing technology by only adopting the test blocking plates with flat plate structures; but for the rubber expansion joint with higher pressure grade or larger specification and model, huge reverse thrust can be generated under test pressure to cause the test plug plate of the common flat plate type structure to generate bulging deformation at the central part, thereby causing seal leakage and leading the test to be impossible; meanwhile, the bulge deforms to drive the flange of the rubber expansion joint body connected with the test plug plate bolt to deform, or a limiting pull rod device for limiting and fastening the position deforms and damages to enable the test to be impossible, or the test finished product part is directly damaged.
In order to reduce bulging deformation of the flat plate type test plugging plate, a common spherical end enclosure structure of a pressure container structure is usually adopted, the end enclosure structure is quite complex in manufacturing process, meanwhile, an end enclosure and a flange are required to be welded by adopting a welding process, and a welding stress-removing heat treatment process and a welding nondestructive flaw detection process are required after machining, so that the spherical end enclosure structure test plugging plate is complex in manufacturing process, high in technical difficulty coefficient, required to be processed by professional machining equipment and professional technicians, long in manufacturing period and quite expensive in manufacturing cost, and the manufacturing cost and the test cost of enterprises are directly or indirectly increased; and another harm brought by the test plugging plate with the structure is that the rubber expansion joint flange which is connected and fastened with the bolt is easy to be deformed and damaged due to overlarge reaction force.
Disclosure of Invention
The utility model aims at solving the technical problem and providing an anti blind plate power device of rubber expansion joint water pressure test. In order to realize the technical purpose, reach foretell technical requirement, the utility model discloses the technical scheme who adopts is: the utility model provides an anti blind plate power device of rubber expansion joint hydraulic test, includes experimental closure plate, experimental rubber expansion joint, anti blind plate power post, its characterized in that: the two ends of the blind plate resisting force column are provided with flange plates of the blind plate resisting force column, and the outer side of the flange plate of the blind plate resisting force column is sequentially provided with a rubber sealing gasket, an adjusting flange plate, a rubber sealing gasket, a flange plate B, a test blocking plate, a flange plate A, a rubber sealing gasket and a threaded cap from inside to outside; the middle part of the blind plate resisting force column is also sleeved with a test rubber expansion joint, and flanges at two ends of the test rubber expansion joint are fastened with a test plugging plate through a plurality of bolts, gaskets and nuts; the outer sides of the outer rings of the two test plugging plates are also provided with a plurality of limiting lug plates, and the pull rod penetrates through the two limiting lug plates and is fastened through limiting pull rod nuts on two sides; and lip-tooth-shaped annular sealing gaskets are arranged on the circumferences of inner holes at two ends of the test rubber expansion joint.
Preferably: the labyrinth seal groove of the thread cap is arranged at the adjacent position of the thread cap and the flange A, and the outer ring of the thread cap is welded with a torque arm of the thread cap.
Preferably: the labyrinth seal groove of the flange A is arranged at the position of the flange A adjacent to the thread cap.
Preferably: the adjacent position of the flange B and the adjusting flange is provided with a labyrinth sealing groove of the flange B.
Preferably: the adjusting flange plate and the adjacent position of the flange plate B are provided with labyrinth sealing grooves of the adjusting flange plate.
Preferably: the adjusting flange and the flange adjacent to the blind plate resisting force column are provided with labyrinth sealing grooves of the adjusting flange.
Preferably: and a labyrinth seal groove of the blind plate resisting force column is arranged at the adjacent position of the flange plate of the blind plate resisting force column and the adjusting flange plate.
Preferably: the other embodiment of the blind plate resisting force column is a plurality of blind plate resisting force columns which are uniformly distributed along the central circumference of the test plugging plate.
Preferably: the other embodiment of the limiting lug plate is that the limiting lug plate and the test plugging plate are welded into a whole.
Preferably: and the flange plate B, the test blocking plate and the flange plate A are welded into a whole or forged into a whole.
The utility model discloses processing technology and simple structure, application scope is big, greatly reduced manufacturing cost, reduced installation intensity of labour, improved work efficiency, experimental qualification rate can reach more than 95%.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of F in FIG. 1;
in the figure, 1, a test blocking plate, 2, a lip tooth annular sealing gasket, 3, a test rubber expansion joint, 4, a nut, 5, a gasket, 6, a bolt, 7, a threaded cap, 7-1, a torque arm of the threaded cap, 7-2, a labyrinth sealing groove of the threaded cap, 8, a flange A, 8-1, a labyrinth sealing groove of the flange A, 9, a rubber sealing gasket, 10, a blind plate resisting force column, 10-1, a flange of the blind plate resisting force column, 10-2, a labyrinth sealing groove of the blind plate resisting force column, 10-3, a fastening thread of the blind plate resisting force column, 11, an adjusting flange, 11-1, a labyrinth sealing groove of the adjusting flange, 12-1, a labyrinth sealing groove of the flange B, 13, a limiting lug, 13-1, a limiting connecting hole, 14, a limiting pull rod, 15, a limiting pull rod gasket, 16. and a pull rod limiting nut.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
In the figure: the utility model provides an anti blind plate power device of rubber expansion joint hydraulic test, includes experimental closure plate 1, experimental rubber expansion joint 3, anti blind plate power post 10, its characterized in that: two ends of the blind plate force resisting column 10 are respectively provided with a flange plate 10-1 of the blind plate force resisting column, and the outer side of the flange plate 10-1 of the blind plate force resisting column is sequentially provided with a rubber sealing gasket 9, an adjusting flange plate 11, a rubber sealing gasket 9, a flange plate B12, a test blocking plate 1, a flange plate A8, a rubber sealing gasket 9 and a threaded cap 7 from inside to outside; the middle part of the blind plate resisting force column 10 is also sleeved with a test rubber expansion joint 3, and flanges at two ends of the test rubber expansion joint 3 are fastened with a test plugging plate 1 through a plurality of bolts 6, gaskets 5 and nuts 4; a plurality of limiting lug plates 13 are further arranged on the outer sides of the outer rings of the two test plugging plates 1, and the pull rod 14 penetrates through the two limiting lug plates 13 and is fastened through limiting pull rod nuts 16 on the two sides; and lip-tooth-shaped annular sealing gaskets 2 are arranged on the circumferences of inner holes at two ends of the test rubber expansion joint 3. The thread cap 7 is provided with a labyrinth seal groove 7-2 of the thread cap at the adjacent position of the flange A8, and the outer ring of the thread cap 7 is welded with a torque arm 7-1 of the thread cap. The labyrinth seal groove 8-1 of the flange A is arranged at the position of the flange A8, which is adjacent to the thread cap 7. The adjacent position of the flange B12 and the adjusting flange 11 is provided with a labyrinth seal groove 12-1 of the flange B. The adjusting flange 11 and the flange B12 are provided with a labyrinth sealing groove 11-1 of the adjusting flange at the adjacent position. The adjusting flange 11 and the flange 10-1 of the anti-blind plate force column are provided with a labyrinth seal groove 11-1 of the adjusting flange at the adjacent position. The adjacent position of the flange 10-1 of the blind plate resisting force column and the adjusting flange 11 is provided with a labyrinth seal groove 10-2 of the blind plate resisting force column. Another embodiment of the blind plate resisting force columns 10 is that a plurality of blind plate resisting force columns 10 are uniformly distributed along the central circumference of the test plugging plate 1. The other embodiment of the limiting lug plate 13 is that the limiting lug plate 13 and the test plugging plate 1 are welded into a whole. And the flange plate B12, the test plug plate 1 and the flange plate A8 are welded into a whole or forged into a whole.
During installation, an appropriate adjusting flange plate 11 with labyrinth seal grooves of adjusting flange plates on two sides is selected according to the structural length of a test rubber expansion joint 3, a rubber seal gasket 9, the adjusting flange plate 11 and the rubber seal gasket 9 are respectively sleeved on a fastening thread end (A) 10-3 of a blind plate resisting force column at one end of the blind plate resisting force column 10, the thread end (A) penetrates through a connecting hole on the test plug plate 1 and is sleeved with the rubber seal gasket 9 and a thread cap 7, a torsion arm 7-1 of the thread cap is twisted to fasten the thread cap 7 to fix the blind plate resisting force column 10, lip-tooth-shaped annular seal gaskets 2 are arranged along the circumferences of inner holes at two ends of the test rubber expansion joint 3, bolts 6 penetrate through screw holes at corresponding positions of the test plug plate 1 and the test rubber expansion joint 3, are sleeved with gaskets 5 and nuts 4 and are pre-fastened with the nuts 4 along the circumferences respectively, and the bolts 6 penetrate through limiting lug plates 13 at n symmetrical positions of the, And a gasket 5 and a nut 4 are sleeved behind the bolt connecting holes of the test plugging plate 1 and the test rubber expansion joint 3, and the nuts are fastened respectively.
After a fastening thread end (B) 10-3 of the blind plate resisting force column at the other end of the blind plate resisting force column 10 is sleeved with a rubber sealing gasket 9, an adjusting flange plate 11 and the rubber sealing gasket 9 respectively, the thread end (B) penetrates through a connecting hole in a test plugging plate 1 and is sleeved with the rubber sealing gasket 9 and a thread cap 7, a torsion arm 7-1 of the thread cap is twisted to enable the thread cap 7 to fasten so as to fix the blind plate resisting force column 10, a lip-tooth-shaped annular sealing gasket 2 is arranged along the circumference of an inner opening of the test rubber expansion joint 3, a bolt 6 penetrates through screw holes in corresponding positions of the test plugging plate 1 and the test rubber expansion joint 3 and is sleeved with a gasket 5 and a nut 4, nuts 4 are pre-fastened along the circumference respectively, and the gasket 5 and the nut 4 are sleeved after the bolt 6 penetrates through bolt connecting holes of a limiting lug plate 13, the test plugging plate 1 and the test rubber expansion joint 3 at n symmetrical positions of the.
All the nuts 4 are symmetrically fastened respectively to ensure that the sealing is not leaked, and the threaded caps 7 at the A, B ends of the two ends of the blind plate resisting force column 10 are fastened respectively in a twisting mode to enable the rubber sealing gaskets 9 to be elastically deformed and fill the labyrinth sealing grooves, so that the rubber sealing gaskets 9 do not leak in the test process.
And the two ends of the limiting pull rod 14 penetrate through limiting connecting holes 13-1 on the limiting lug plates 13 along the limiting lug plates 13 arranged on the circumference of the test rubber expansion joint 3, are respectively sleeved with a limiting pull rod gasket 15 and a limiting pull rod nut 16, and are respectively fastened by the nuts for locking.
The anti-blind plate force and the sealing working principle thereof are as follows:
during the hydrostatic test, the internal test pressure of the test rubber expansion joint acts on the test block plate to form huge reverse thrust, because the outer side of the test block plate is connected and fastened with a flange of the test rubber expansion joint body by bolts, and N limit pull rods which are symmetrically distributed along the circumference are adopted for position limiting protection, if the two ends of the test block plate are locked and fixed without a blind plate resisting force column in the center of the test block plate, a bulging deformation can be generated at the weak part in the center, because the blind plate resisting force column of the utility model is adopted and the screw cap is adopted for fastening and fixing at the outer side of the test block plate, the bulging deformation can not be generated, the pressurized medium in the test rubber expansion joint tries to pass through the gap between the flange plates, because a rubber sealing gasket and a circumferential annular sealing groove (also called as a labyrinth sealing groove) which is processed from the inside to the outside on the flange plates are adopted between the flange plates, the, when the outermost layer close to the sealing test medium bears the maximum pressure, even if a small amount of test medium leaks towards the inner layer, the pressure from the attenuation leakage from outside to inside to the outward leakage of the fastening threads at the two ends of the blind plate force column is very small, the test medium with the very small pressure cannot penetrate through the labyrinth seal structure between the thread cap and the flange plate to generate the outward leakage, and the small amount of leakage medium is completely sealed in the closed thread cap.
The selection of the screw cap and the blind plate resisting force columns (specification, material and quantity) can not lead the screw cap to be loosened and the blind plate resisting force columns to be broken or deformed according to the reaction force generated under the test pressure; the selection of the limiting pull rod and the nuts (quantity, specification and material) can not cause the limiting pull rod to bend, yield and plastically deform or the nuts to loosen or even pull off according to the reaction force generated under the test pressure.
The use of the lip-tooth annular sealing gasket can improve the one-time installation qualification rate, reduce the sealing leakage in the test process, reduce the installation labor intensity and protect the sealing surface of the test rubber expansion joint.
The preferred scheme is as follows: for the requirement of carrying out the displacement test simultaneously, the series connection mode of communicating the middle of two rubber expansion joints can be adopted so that the middle of the connection can be movably adjusted when the two ends of the rubber expansion joints are fixed.
The preferred scheme is as follows: the adjusting flange plates on the inner side of the test plugging plate can be used without or in a plurality of numbers, and a plurality of annular sealing grooves (labyrinth sealing grooves) are arranged from inside to outside.
The preferred scheme is as follows: concave-convex sealing grooves and metal sealing gaskets or other types of sealing gaskets and sealing structures can be arranged for high pressure grades.
The middle test plugging plate of the utility model still adopts a flat plate structure, can be manufactured by simple flame cutting equipment, drilling equipment, common turning equipment and common processing technical workers, has short production period, and the thickness of the test plugging plate material is only about 2/3 of the thickness of the test plugging plate material of the end socket structure, thereby greatly reducing the manufacturing cost, lightening the weight of the test plugging plate, reducing the labor intensity of installation and improving the labor efficiency; meanwhile, the anti-blind plate force column adopts an adjustable universal part design, and is applicable to a plurality of pressure grades, a plurality of specifications and a plurality of installation lengths; the utility model discloses stress concentration is in anti blind plate power post during the experiment, makes this body flange deformation probability greatly reduced with the rubber expansion joint of experimental closure plate bolted connection fastening, has improved test efficiency, has reduced experimental damage risk.
The above embodiments of the present invention are only examples for clearly illustrating the present invention, but not for limiting the scope of the present invention, and all equivalent technical solutions also belong to the scope of the present invention, and the scope of the present invention should be defined by the claims.
Claims (10)
1. The utility model provides an anti blind plate power device of rubber expansion joint water pressure test, includes experimental closure plate (1), experimental rubber expansion joint (3), anti blind plate power post (10), its characterized in that: two ends of the blind plate force resisting column (10) are respectively provided with a flange (10-1) of the blind plate force resisting column, and the outer side of the flange (10-1) of the blind plate force resisting column is sequentially provided with a rubber sealing gasket (9), an adjusting flange (11), a rubber sealing gasket (9), a flange B (12), a test plug plate (1), a flange A (8), a rubber sealing gasket (9) and a threaded cap (7) from inside to outside; the middle part of the blind plate resisting force column (10) is also sleeved with a test rubber expansion joint (3), and flanges at two ends of the test rubber expansion joint (3) are fastened with the test plugging plate (1) through a plurality of bolts (6), gaskets (5) and nuts (4); the outer sides of the outer rings of the two test plugging plates (1) are also provided with a plurality of limiting lug plates (13), and the pull rod (14) penetrates through the two limiting lug plates (13) and is fastened through limiting pull rod nuts (16) on two sides; and lip-tooth-shaped annular sealing gaskets (2) are arranged on the circumferences of inner holes at two ends of the test rubber expansion joint (3).
2. The rubber expansion joint hydraulic test blind-plate-force resisting device according to claim 1, characterized in that: the labyrinth seal groove (7-2) of the screw cap is arranged at the adjacent position of the screw cap (7) and the flange A (8), and the torque arm (7-1) of the screw cap is welded on the outer ring of the screw cap (7).
3. The rubber expansion joint hydraulic test blind-plate-force resisting device according to claim 1, characterized in that: the adjacent position of the flange A (8) and the thread cap (7) is provided with a labyrinth seal groove (8-1) of the flange A.
4. The rubber expansion joint hydraulic test blind-plate-force resisting device according to claim 1, characterized in that: the adjacent position of the flange B (12) and the adjusting flange (11) is provided with a labyrinth seal groove (12-1) of the flange B.
5. The rubber expansion joint hydraulic test blind-plate-force resisting device according to claim 1, characterized in that: the adjusting flange (11) and the flange B (12) are provided with a labyrinth sealing groove (11-1) of the adjusting flange at the adjacent position.
6. The rubber expansion joint hydraulic test blind-plate-force resisting device according to claim 1, characterized in that: the adjusting flange (11) and the flange (10-1) of the anti-blind plate force column are provided with a labyrinth seal groove (11-1) of the adjusting flange at the adjacent position.
7. The rubber expansion joint hydraulic test blind-plate-force resisting device according to claim 1, characterized in that: the adjacent position of the flange (10-1) of the blind plate force resisting column and the adjusting flange (11) is provided with a labyrinth seal groove (10-2) of the blind plate force resisting column.
8. The rubber expansion joint hydraulic test blind-plate-force resisting device according to claim 1, characterized in that: the other embodiment of the blind plate resisting force column (10) is a plurality of blind plate resisting force columns (10) which are uniformly distributed along the central circumference of the test plugging plate (1).
9. The rubber expansion joint hydraulic test blind-plate-force resisting device according to claim 1, characterized in that: the other embodiment of the limiting lug plate (13) is that the limiting lug plate (13) and the test plugging plate (1) are welded into a whole.
10. A rubber expansion joint water pressure test blind force resisting device according to one of claims 1 to 5, characterized in that: and the flange plate B (12), the test blocking plate (1) and the flange plate A (8) are welded into a whole or forged into a whole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020732309.0U CN212254900U (en) | 2020-05-07 | 2020-05-07 | Rubber expansion joint hydrostatic test blind plate force resisting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020732309.0U CN212254900U (en) | 2020-05-07 | 2020-05-07 | Rubber expansion joint hydrostatic test blind plate force resisting device |
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| Publication Number | Publication Date |
|---|---|
| CN212254900U true CN212254900U (en) | 2020-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020732309.0U Expired - Fee Related CN212254900U (en) | 2020-05-07 | 2020-05-07 | Rubber expansion joint hydrostatic test blind plate force resisting device |
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| Country | Link |
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| CN (1) | CN212254900U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114813381A (en) * | 2022-06-29 | 2022-07-29 | 江苏泓源环保科技有限公司 | Rubber expansion joint hydrostatic test blind plate force resisting device |
-
2020
- 2020-05-07 CN CN202020732309.0U patent/CN212254900U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114813381A (en) * | 2022-06-29 | 2022-07-29 | 江苏泓源环保科技有限公司 | Rubber expansion joint hydrostatic test blind plate force resisting device |
| CN114813381B (en) * | 2022-06-29 | 2022-11-25 | 江苏泓源环保科技有限公司 | Rubber expansion joint hydrostatic test blind plate force resisting device |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201229 |
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| CF01 | Termination of patent right due to non-payment of annual fee |