CN215105830U - Drainage device for reducing external pressure of buried pressure steel pipe - Google Patents
Drainage device for reducing external pressure of buried pressure steel pipe Download PDFInfo
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- CN215105830U CN215105830U CN202120505126.XU CN202120505126U CN215105830U CN 215105830 U CN215105830 U CN 215105830U CN 202120505126 U CN202120505126 U CN 202120505126U CN 215105830 U CN215105830 U CN 215105830U
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Abstract
The utility model provides a drainage device for reducing the external pressure of an embedded pressure steel pipe, which comprises a pressure steel pipe, industrial soap, annular channel steel, mounting holes and a drain valve, wherein the outer wall of the cross section of the pressure steel pipe is provided with a circle of closed annular channel steel, the mounting holes for mounting the drain valve are uniformly arranged along the circumferential direction of the cross section, welding a reinforcing plate at the mounting hole to reinforce the mounting hole, using a cavity formed by the annular channel steel, the outer wall of the pressure steel pipe and the reinforcing plate as a water collecting tank, fixing the annular channel steel, the outer wall of the reinforcing plate and the reinforcing plate by spot welding, filling a gap at a position without a welding seam between the annular channel steel and the outer wall of the pressure steel pipe and between the annular channel steel and the reinforcing plate with industrial soap, and when external water breaks and permeates into the periphery of the outer wall of the pressure steel pipe, the industrial soap is washed away by the external water, the external water flows into the water collecting tank along a gap between the annular channel steel and the outer wall of the reinforcing plate, and the drain valve is used for discharging the water in the water collecting tank into the pressure steel pipe in a one-way mode. The utility model discloses simple structure can effectively reduce the outer water pressure of pressure steel pipe.
Description
Technical Field
The utility model relates to a hydraulic and hydroelectric engineering field specifically is a reduce drainage device of formula penstock external pressure that buries.
Background
The buried pressure steel pipe is a steel pipe which is buried in a rock body and concrete is backfilled between the steel pipe and surrounding rocks. The external water pressure of the penstock has two sources, namely the underground water pressure of a mountain body and the water pressure acted on the penstock by the external seepage of the water in the reinforced concrete lining at the upper part of the penstock. Under the same condition, the internal pressure resistance of the steel pipe is higher than the external pressure resistance, and the steel pipe is easy to generate instability under the action of external pressure, so that the drainage and depressurization design is required in consideration of economic rationality.
The existing main measures for draining and depressurizing comprise: (1) arranging a drainage gallery at the upper part of the pressure steel pipe, embedding radial drainage pipes around the cross section of the drainage gallery to form a drainage net, and collecting external water around the steel pipe in the drainage gallery along the drainage pipes for drainage; (2) the steel pipe outer wall adopts the hoop channel-section steel that catchments, sets up the drain pipe that is on a parallel with the steel pipe axis and leads the water in the channel-section steel to the factory building in and discharge, (3) steel pipe outer wall parcel composite drainage board, outer water is along the drainage board and discharge.
However, the existing designs have the following drawbacks: the method (1) needs additional excavation of a drainage gallery, and has large investment; in the method (2), the gap between the outer wall of the steel pipe and the excavated tunnel needs to meet the requirement of installing the entrance space of the drainage system, and the excavated section of the tunnel needs to be increased correspondingly; the drainage distance is long, the outlet flow is difficult to accurately estimate, and potential safety hazards are caused to the operation of electromechanical equipment of a factory building; the drainage plate of the method (3) is easy to block when concrete between the outer wall of the steel pipe and the tunnel is backfilled, so that the drainage effect is influenced; the outer wall of the steel plate is contacted with water flow, so that corrosion is easy to generate; in addition, the steel pipe and the backfilled concrete are separated by the drainage plate, and the joint stress between the steel pipe and the surrounding rock is influenced.
Disclosure of Invention
The above-mentioned not enough to prior art exists, the utility model aims at providing a reduce drainage device of buried penstock external pressure, its simple structure can effectively reduce penstock's outer water pressure, is applicable to the buried penstock that the buried depth is big, the external pressure is high.
The utility model discloses a solve above-mentioned technical problem and adopt following technical scheme:
a drainage device for reducing external pressure of an embedded pressure steel pipe comprises the pressure steel pipe, industrial soap, annular channel steel, mounting holes and a drain valve, wherein a circle of closed annular channel steel is arranged on the outer wall of the cross section of the pressure steel pipe in a surrounding manner, the mounting holes for mounting the drain valve are uniformly arranged along the annular direction of the cross section, welding a reinforcing plate at the mounting hole to reinforce the mounting hole, using a cavity formed by the annular channel steel, the outer wall of the pressure steel pipe and the reinforcing plate as a water collecting tank, fixing the annular channel steel, the outer wall of the pressure steel pipe and the reinforcing plate by spot welding, filling a gap at a position without a welding seam between the annular channel steel, the outer wall of the pressure steel pipe and the reinforcing plate with industrial soap, and when external water is broken and seeps into the periphery of the outer wall of the pressure steel pipe, the industrial soap is washed away by the external water, the external water flows into the water collecting tank along a gap between the annular channel steel and the outer wall of the reinforcing plate, and the drain valve is used for discharging the water in the water collecting tank into the pressure steel pipe in a one-way mode.
Furthermore, the annular channel steel, the reinforcing plate and the mounting holes are uniformly distributed along the length direction of the pressure steel pipe.
Furthermore, the drain valve comprises a bolt, an outlet retainer ring, an outlet spring, a spherical plug, an inlet spring and an inlet retainer ring, wherein the bolt is in a cylindrical shape, the outer surface part of the side wall of the bolt is provided with threads, the reinforcing plate is provided with threads along the thickness direction, and the threads on the bolt are matched with the threads on the reinforcing plate to fix the drain valve in the mounting hole; the diameter of an outlet part of the inner wall of a cylinder of the bolt is large, the diameter of an inlet part of the inner wall of the cylinder of the bolt is small, an outlet check ring is fixed at an outlet end, an inlet check ring is fixed at an inlet end, an outlet spring, a spherical plug and an inlet spring are sequentially placed between the outlet check ring and the inlet check ring, and orifices are formed in the outlet check ring and the inlet check ring to form a honeycomb surface.
Furthermore, a water stop rubber is arranged on the reinforcing plate and used for preventing the internal water and the external water of the pressure steel pipe from seeping along a gap between the bolt and the threads of the reinforcing plate.
Furthermore, the upper end face of the bolt is provided with a hexagonal screw hole, and when the drain valve is mounted and dismounted, a tool is inserted into the hexagonal screw hole to rotate the bolt.
The utility model discloses a structure has following advantage:
(1) extra excavation of a drainage gallery is not needed, and the tunnel is small in excavation size during installation, so that investment is saved;
(2) the water outside the pressure steel pipe is discharged into the pressure steel pipe through the drain valve, the whole device has short drainage distance and easy flow control;
(3) whether the water collecting tank is blocked by the backfilled concrete slurry can be checked through the mounting holes, and the water collecting tank is dredged before the slurry is initially set;
(4) the drain valve has the advantages of simple structure, convenient installation and disassembly, and convenient maintenance and replacement.
Drawings
FIG. 1 is a schematic structural view of the buried penstock drainage device of the present invention;
FIG. 2 is a schematic view of the present invention before installation of the drain valve;
FIG. 3 is an enlarged view of portion A of FIG. 1;
FIG. 4 is a connection diagram of the annular channel steel and the pressure steel pipe of the present invention;
fig. 5 is a schematic structural view of the drain valve of the present invention.
In the figure: 1-pressure steel pipe, 2-reinforcing plate, 3-industrial soap, 4-annular groove steel, 5-water collecting tank, 6-mounting hole, 7-water stopping rubber, 8-drain valve, 8.1-bolt, 8.2-outlet retainer ring, 8.3-outlet spring, 8.4-spherical plug, 8.5-inlet spring, 8.6-inlet retainer ring, 8.7-thread and 8.8-hexagonal screw hole.
Detailed Description
The technical solution of the present invention is further described in detail with reference to the accompanying drawings, but the scope of protection is not limited thereto.
Referring to fig. 1-3, an embodiment of the present invention provides a device for reducing external pressure of an embedded pressure steel pipe, including a pressure steel pipe 1, a reinforcing plate 2, industrial soap 3, ring-shaped channel steel 4, a mounting hole 6, a water-stop rubber 7, and a drain valve 8.
As shown in fig. 2 and 4, the outer wall of the cross section of the pressure steel pipe 1 is provided with a circle of closed ring-shaped channel steel 4, the installation holes 6 for installing the drain valves 8 are uniformly arranged along the circumferential direction of the cross section, the reinforcing plates 2 are welded at the installation holes 6 and used for reinforcing the installation holes 6, and the circumferential channel steel 4, the reinforcing plates 2 and the installation holes 6 are uniformly arranged along the length direction of the pressure steel pipe 1, as shown in fig. 1. And a cavity formed by the annular channel steel 4, the outer wall of the pressure steel pipe 1 and the reinforcing plate 2 is used as a water collecting tank 5. The annular channel steel 4 is fixed with the outer wall of the pressure steel pipe 1 and the reinforcing plate 2 through spot welding, and the gap at the position without a welding seam between the annular channel steel 4 and the outer wall of the pressure steel pipe 1 and between the annular channel steel and the reinforcing plate 2 is filled with industrial soap 3, so that concrete slurry is prevented from entering a water collecting tank 5 when backfilling concrete.
Referring to fig. 5, the drain valve 8 includes a bolt 8.1, an outlet retainer 8.2, an outlet spring 8.3, a spherical plug 8.4, an inlet spring 8.5, and an inlet retainer 8.6.
The bolt 8.1 is cylindrical, the outer surface of the side wall of the bolt 8.1 is provided with threads 8.7, the reinforcing plate 2 is provided with threads along the thickness direction, and the threads 8.7 on the bolt 8.1 are matched with the threads on the reinforcing plate 2 to fix the drain valve 8 in the mounting hole 6. The reinforcing plate 2 is provided with a water stop rubber 7, and the water stop rubber 7 is used for preventing the internal water and the external water of the penstock 1 from seeping along the gap between the bolt 8.1 and the thread of the reinforcing plate 2.
The upper end face of the bolt 8.1 is provided with a hexagonal screw hole 8.8, and when the drain valve 8 is installed and disassembled, a tool can be inserted into the hexagonal screw hole 8.8 to rotate the bolt 8.1. The diameter of the outlet part of the inner wall of the cylinder of the bolt 8.1 is large, the diameter of the inlet part is small, the outlet end is fixed with an outlet retainer ring 8.2, the inlet end is fixed with an inlet retainer ring 8.6, and an outlet spring 8.3, a spherical plug 8.4 and an inlet spring 8.5 are sequentially arranged between the outlet retainer ring 8.2 and the inlet retainer ring 8.6. The outlet retainer ring 8.2 and the inlet retainer ring 8.6 are provided with orifices to form a honeycomb surface, water can freely pass through, and the drain valve 8 has the function of a one-way valve and only allows the water to flow from the inlet end to the outlet end.
The utility model discloses the theory of operation: outer water constantly permeates around 1 outer wall of pressure steel pipe, when outer water is full of the crack around 1 outer wall of pressure steel pipe, pressure increases, when outer water pressure surpassed a definite value, industrial soap 3 is washed away to outer water, along annular channel- section steel 4 and 1 outer wall of pressure steel pipe, the gap of 2 outer walls of reinforcing plate flows into water catch bowl 5, when water catch bowl 5 is full of the water, because the external pressure is greater than interior pressure, rivers wash open in 8.4 discharge pressure steel pipe 1 of spherical stopper 8 of drain valve 8, when the external pressure reduces, the spring recovers, 8.4 of spherical stopper of drain valve 8 close under the spring action, a drainage process has been accomplished this moment.
After the pressure steel pipe completes backfill grouting and contact grouting respectively, whether the water collecting tank 5 is blocked by concrete grout is checked through the mounting hole 6, if the water collecting tank is blocked, the water collecting tank is dredged before the grout is initially set, and finally the drain valve 8 is installed. When the pressure steel pipe is overhauled, the drain valve 8 can be maintained and replaced by the way. When the pressure steel pipe joints are installed on site, the outer wall of the pressure steel pipe does not need to be reserved with a human entering space for installing a drainage device, and all installation work of the pressure steel pipe can be completed in the pipe. The external water of the pressure steel pipe is directly discharged into the steel pipe through the drain valve 8, and the water in the steel pipe cannot flow into the outer wall of the steel pipe.
The above description is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (5)
1. The utility model provides a reduce drainage device of buried pressure steel pipe external pressure which characterized in that: including pressure steel pipe, industrial soap, annular channel-section steel, the mounting hole, the drain valve, the outer wall of the cross section department that encircles pressure steel pipe sets up the annular channel-section steel of round confined, the hoop that evenly sets up along the cross section is used for installing the mounting hole of drain valve, weld the reinforcing plate in mounting hole department with the enhancement mounting hole, annular channel-section steel and pressure steel pipe outer wall, the cavity that the reinforcing plate formed is as the water catch bowl, annular channel-section steel and reinforcing plate outer wall, the reinforcing plate adopts spot welding fixed, the gap of the no welding seam department between annular channel-section steel and pressure steel pipe outer wall, the reinforcing plate is clogged with industrial soap, when the outer water is disconnected to be infiltrated around the pressure steel pipe outer wall, industrial soap is washed away to the extra income water catch bowl along the gap of annular channel-section steel and reinforcing plate outer wall, the drain valve is used for the one-way discharge pressure steel pipe of the water catch bowl.
2. The drainage apparatus for reducing the external pressure of an embedded penstock as claimed in claim 1, wherein: the annular channel steel, the reinforcing plate and the mounting holes are uniformly distributed along the length direction of the pressure steel pipe.
3. The drainage apparatus for reducing the external pressure of an embedded penstock as claimed in claim 1, wherein: the drain valve comprises a bolt, an outlet retainer ring, an outlet spring, a spherical plug, an inlet spring and an inlet retainer ring, wherein the bolt is in a cylindrical shape, the outer surface part of the side wall of the bolt is provided with threads, the reinforcing plate is provided with threads along the thickness direction, and the threads on the bolt are matched with the threads on the reinforcing plate and used for fixing the drain valve in the mounting hole; the diameter of an outlet part of the inner wall of a cylinder of the bolt is large, the diameter of an inlet part of the inner wall of the cylinder of the bolt is small, an outlet check ring is fixed at an outlet end, an inlet check ring is fixed at an inlet end, an outlet spring, a spherical plug and an inlet spring are sequentially placed between the outlet check ring and the inlet check ring, and orifices are formed in the outlet check ring and the inlet check ring to form a honeycomb surface.
4. The drainage apparatus for reducing the external pressure of an embedded penstock as claimed in claim 3, wherein: the reinforcing plate is provided with a water stop rubber which is used for preventing the internal water and the external water of the pressure steel pipe from seeping along the gap between the bolt and the thread of the reinforcing plate.
5. The drainage apparatus for reducing the external pressure of an embedded penstock as claimed in claim 3, wherein: the upper end face of the bolt is provided with a hexagonal screw hole, and when the drain valve is mounted and dismounted, a tool is inserted into the hexagonal screw hole to rotate the bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120505126.XU CN215105830U (en) | 2021-03-08 | 2021-03-08 | Drainage device for reducing external pressure of buried pressure steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120505126.XU CN215105830U (en) | 2021-03-08 | 2021-03-08 | Drainage device for reducing external pressure of buried pressure steel pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215105830U true CN215105830U (en) | 2021-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120505126.XU Active CN215105830U (en) | 2021-03-08 | 2021-03-08 | Drainage device for reducing external pressure of buried pressure steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215105830U (en) |
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2021
- 2021-03-08 CN CN202120505126.XU patent/CN215105830U/en active Active
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