Multifunctional drainage hole device with adaptive irregular hole wall structure

Abstract

The present invention relates to a multifunctional drainage hole orifice device that is adaptive to irregular hole wall structures. The orifice device includes a main pipe, an end cover, a pressure ring and a pressure cover. The main pipe is provided with an end cover at one end and a pressure cover at the other end. A plurality of pressure rings are sleeved on the main pipe, and the plurality of pressure rings are arranged between the end cover and the pressure cover. Rubber rings and water-expandable water-stop rings are alternately arranged between adjacent pressure rings. The present invention solves a series of problems that the existing orifice device is not adapted to irregular hole wall structures, has a single purpose, is not adaptable, is inconvenient to install, has insufficient anchoring force, has a small flow area, and is inconvenient to repair. Compared with the existing drainage hole orifice device, the present invention is adapted to various irregular hole wall structures and has a good water-stopping effect. A plurality of water-expandable water-stop rings are used to replace elastic rubber rings. When there is water in the drainage hole, the water-expandable water-stop ring will further expand fully to actively fill the irregular gaps, ensure close contact with the irregular hole wall, and exert a good water-stopping effect.

Description

Technical Field

[0001] The invention relates to the field of hydraulic structure foundation treatment, and in particular to a multifunctional drainage hole orifice device with an adaptive irregular hole wall structure. Background Art

[0002] Drain holes are widely used in dam foundations, slopes, and underground caverns of water conservancy and hydropower projects to reduce the uplift pressure of the dam foundation, the groundwater level of the slopes, and the seepage pressure of the surrounding rock of the underground caverns to improve the safety of the buildings. Drain holes are generally equipped with orifice devices to collect seepage water and drain it centrally.

[0003] The existing drainage hole opening device includes: a main pipe, end covers and hexagonal nut glands are respectively sleeved on both ends of the main pipe, and a pressure ring and an elastic rubber ring are arranged on the end covers and the hexagonal nut gland. The existing drainage hole opening device has the following problems:

[0004] 1. Not suitable for irregular hole wall structure

[0005] Drainage hole construction generally adopts drill rod impact drilling rigs (such as down-the-hole drills) to improve work efficiency. Drill rod impact drilling rigs are composed of drill rods, ball-tooth drill bits and impactors. They use the impact principle to form holes. Although they are more efficient than rotary drilling rigs, the walls of the holes are not smooth and irregular. Conventional orifice devices use pressure caps to squeeze elastic rubber rings to securely fix the orifice devices. However, due to the irregular hole walls and the extremely limited deformation capacity of the elastic rubber rings, water leakage often occurs from the contact surface between the device and the hole wall after installation, forcing measures such as orifice mortar plugging to be taken to plug the leaks.

[0006] 2. Single purpose and poor adaptability

[0007] The purpose of drainage hole orifice device is to collect seepage water and drain it centrally. When some projects require the measurement of seepage pressure or the control of drainage volume, conventional orifice devices cannot be used. In addition, the orifice protection length of conventional orifice device products is fixed. If the orifice device length needs to be changed, the mold needs to be adjusted and reprocessed.

[0008] 3. Inconvenient installation and insufficient anchoring force

[0009] Conventional orifice devices apply compressive stress by tightening the hexagonal threads of the gland with a wrench. The coarse thread has a poor locking effect and can easily lead to insufficient anchoring force.

[0010] 4. Small flow aperture, inconvenient maintenance

[0011] The use of hexagonal nut locking gland limits the flow diameter of the drainage pipe, which is prone to clogging and inconvenient for observation and treatment. In addition, after the conventional orifice device contact surface leaks and takes measures such as mortar plugging to plug the leak, the orifice device will lose its functions such as disassembly and inspection. Summary of the invention

[0012] To solve the above problems, the present invention provides a multifunctional drainage hole orifice device with adaptive irregular hole wall structure, which is suitable for the construction of drainage holes in dam foundations, slopes and underground caverns. It can adapt to irregular hole wall structures, has comprehensive functions, and is easy to install and maintain.

[0013] The technical solution adopted by the present invention is: a multifunctional drainage hole orifice device with an adaptive irregular hole wall structure, including a main pipe, an end cover, a pressure ring and a pressure cover, one end of the main pipe is provided with an end cover, and the other end is provided with a pressure cover, which is characterized in that: a plurality of pressure rings are sleeved on the main pipe, and the plurality of pressure rings are arranged between the end cover and the pressure cover, and rubber rings and water-expandable water-stop rings are alternately provided between adjacent pressure rings.

[0014] Preferably, a pipe joint is provided on the outer sleeve of the end of the main pipe close to the gland, and the gland and the pipe joint are both connected to the main pipe through threads.

[0015] Furthermore, the main pipe is connected to a reducing elbow through a pipe joint, and the reducing elbow is connected to a straight pipe; the middle of the straight pipe is connected to a pressure gauge and a flow control valve in sequence, and the end is connected to a hose or an elbow.

[0016] Preferably, the gland is provided with a threaded hole for a wrench to clamp.

[0017] Preferably, the end cover and the main pipe are integrally formed.

[0018] Preferably, the drainage hole has a diameter of 91 mm.

[0019] Furthermore, a fine thread is provided on one end of the main pipe close to the gland, with a length of 500 mm; the outer diameter of the main pipe is 63 mm, and the inner diameter is 48 mm.

[0020] Furthermore, the gland has an outer diameter of 130mm and an inner diameter of 63mm; the threaded pipe joint has an outer diameter of 90mm and an inner diameter of 63mm.

[0021] Furthermore, the outer diameter of the rubber ring is 91 mm and the inner diameter is 63 mm; the outer diameter of the pressure ring is 90 mm and the inner diameter is 63 mm.

[0022] Furthermore, the cross-section of the water-swellable water-stop ring is rectangular or "O"-shaped, with an inner diameter of 63 mm.

[0023] The beneficial effects achieved by the present invention are: the present invention better solves a series of problems such as the existing orifice device is not suitable for irregular hole wall structure, single purpose, poor adaptability, inconvenient installation, insufficient anchoring force, small flow area, inconvenient maintenance, etc. Compared with the existing drainage hole orifice device, the present device has the following outstanding advantages:

[0024] (1) Adapt to various irregular hole wall structures and have good water-stopping effect

[0025] Elastic rubber rings are vulcanized rubber with limited compression deformation capacity and cannot meet the water-stopping requirements of irregular hole wall structures. Multiple water-swelling water-stop rings are used to replace elastic rubber rings. During installation, force is applied through the gland, and the effect is basically the same as that of elastic rubber rings. When there is water in the drainage hole, the water-swelling water-stop ring will further expand fully, actively fill the irregular gaps, ensure close contact with the irregular hole wall, and play a good water-stopping effect.

[0026] (2) Simplify drilling equipment and improve construction efficiency

[0027] The device has low requirements on the wall of the drainage hole and does not require a rotary drill (such as a geological drill) to form the hole, but uses an impact drill to form the hole, which greatly improves the construction efficiency.

[0028] (3) Strong adaptability and more comprehensive functions

[0029] This device is assembled on-site from parts and components. The length of the main pipe can be adjusted appropriately according to different needs. The number of rubber rings, pressure rings and water-expanding water-stop rings can be flexibly used according to the protection depth of each project. The length of the exposed section does not affect the product's use function, so it can adapt to the requirements of different protection depths, changing the problem of length limitation of the original mold forming method. Compared with conventional orifice devices, it has added a flow control valve and a pressure gauge to meet the requirements of seepage pressure observation and flow control.

[0030] (4) Easy to install, firm and reliable

[0031] The main pipe adopts a fine-pitch thread design, and additional threaded holes are added to the gland. The "L"-shaped hook wrench is used to apply torque to the gland, which saves effort and is more secure to install. In addition, when there is water in the drain hole, the water-expanding water stop ring expands fully, providing a higher anchoring force.

[0032] (5) Easy maintenance

[0033] Since the restriction of the flow aperture by the hexagonal nut gland of the traditional orifice device is changed, the flow area is greatly improved, which can effectively alleviate the clogging phenomenon and make it easier to observe and deal with the clogging problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of the present invention;

[0035] Figure 2 It is a schematic diagram of the gland structure;

[0036] Figure 3 is a schematic diagram of the wrench structure;

[0037] Figure 4 It is a schematic diagram of the installation of the orifice device;

[0038] Figure numerals: 1. main pipe; 2. end cover; 3. pressure cap; 31. threaded hole; 4. pressure ring; 5. rubber ring; 6. water-swelling water-stop ring; 7. pipe joint; 8. reducing elbow; 9. clamp; 10. straight pipe; 11. pressure gauge; 12. flow control valve; 13. buckle; 14. hose; 15. filter pipe; 100. lining concrete; 200. drainage ditch; 300. bottom plate concrete. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0040] like Figure 1-3 As shown, a multifunctional drainage hole opening device of the present invention, which is adaptive to irregular hole wall structure, comprises a main pipe 1, an end cover 2, a pressure ring 4, a pressure cover 3, a rubber ring 5 and a water-expandable water stop ring 6. The end cover 2 and the main pipe 1 are integrally formed. The end cover 2 is arranged at one end of the main pipe 1. The other end of the main pipe 1 is provided with a fine thread. The inner ring of the pressure cover 3 is provided with an internal thread. The pressure cover 3 is screwed into the end of the main pipe 1 with a fine thread and connected to the main pipe 1 through the thread. A plurality of pressure rings 4 ( Figure 1 There are 6 pressure rings in total, and multiple pressure rings 4 are sleeved on the main pipe 1. Rubber rings 5 ​​and water-swelling water-stop rings 5 ​​are alternately arranged between adjacent pressure rings 4. The pressure ring 4, rubber ring 5 and water-swelling water-stop ring 5 are combined into an integral sealing structure, one end of which is close to the end cover 2, and the other end is close to the pressure cover 3; after the drainage hole opening device of the present invention is installed as a whole at the drainage hole opening, when there is water in the drainage hole, the water-swelling water-stop ring 5 will further expand fully, actively fill the irregular gap, ensure close contact with the irregular hole wall, and play a good water-stopping effect.

[0041] In this embodiment, a pipe joint 7 is provided on the end of the main pipe 1 near the gland 3, and the pipe joint 7 is connected to the main pipe 1 through threads. Figure 4 As shown, the main pipe 1 is connected to the plastic reducer elbow 8 through the pipe joint 7, and the reducer elbow 8 is connected to the plastic straight pipe 10 through the plastic clamp 9; the middle of the plastic straight pipe 10 is connected to the pressure gauge 11 and the flow control valve 12 in sequence, and the end is connected to the hose 14 or the elbow to drain the seepage water into the drainage ditch 200. The pipe should be able to withstand 2.0 times the maximum seepage pressure, and the range of the pressure gauge 11 should not be less than 2.0 times the maximum seepage pressure. Compared with the conventional orifice device, the flow control valve 12 and the pressure gauge 11 are added to meet the requirements of seepage pressure observation and flow control. The MY system plastic water filter pipe is provided on the end of the main pipe 1 close to the end cover 2 to prevent the main pipe 1 from being blocked.

[0042] In this embodiment, the gland 3 is provided with a threaded hole 31 for a wrench to clamp. Figure 2 and Figure 3, apply torque to the gland through an "L"-shaped hook wrench, which saves effort and is more secure to install.

[0043] In this embodiment, the diameter of the drainage hole is 91 mm, the main pipe 1, the end cover 2 and the pressure ring 3 are all made of hard UPVC, the main pipe 1 is 500 mm long, the outer diameter is 63 mm, and the inner diameter is 48 mm; the outer diameter of the pressure cover 2 is 130 mm, and the inner diameter is 63 mm; the outer diameter of the pipe joint 7 is 90 mm, and the inner diameter is 63 mm; the outer diameter of the rubber ring 5 is 91 mm, and the inner diameter is 63 mm; the outer diameter of the pressure ring 4 is 90 mm, and the inner diameter is 63 mm; the cross-section of the water-swelling waterstop ring 6 is rectangular or "O"-shaped, and the inner diameter is 63 mm.

[0044] The installation and construction process of the orifice device of the present invention is as follows:

[0045] 1. Drain hole drilling: Before the construction of the drainage hole, confirm the location, direction, hole diameter and hole depth of the drainage hole according to the requirements of the construction drawings. The drainage hole is drilled with an impact drill (such as a down-the-hole drill). After the drilling is completed, the hole is flushed with a large flow of water.

[0046] 2. Assembly of the orifice device: Assemble the rubber ring 5, the pressure ring 4 and the water-swelling water stop ring 6 on the main pipe 1 in sequence. The number of groups of the assembled rubber ring 5, the pressure ring 4 and the water-swelling water stop ring 6 can be adjusted according to the actual orifice protection length requirements. After the last group of rubber rings 5, pressure rings 4 and water-swelling water stop rings 6 are installed, continue to install the gland 3 and the threaded pipe joint 7 on the main pipe 1.

[0047] 3. Installation of the orifice device: Apply force to the threaded hole 31 on the gland 3 using an “L”-shaped hook wrench until the orifice device is securely installed.

[0048] 4. Installation of the flow control valve 11 and the pressure gauge 12: A plastic reducer elbow 8 (it can also be a common elbow, and the elbow model is selected according to the pipe diameter) is set on the top of the orifice device main pipe 1, and the reducer elbow 8 is connected to a plastic straight pipe 10. The middle of the straight pipe 10 is connected to the pressure gauge 11 and the flow control valve 12 in sequence, and the end of the straight pipe 10 is connected to a plastic hose 14 or an elbow to drain the seepage water into the drainage ditch 200.

[0049] The above shows and describes the basic principles and main structural features of the present invention. The present invention is not limited to the above examples. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A multifunctional drainage hole orifice device with an adaptive irregular hole wall structure, suitable for the construction of drainage holes in dam foundations, slopes and underground caverns, comprising a main pipe, an end cover, a pressure ring and a pressure cover, wherein one end of the main pipe is provided with an end cover and the other end is provided with a pressure cover, and is characterized in that: The main pipe is sleeved with a plurality of pressure rings, which are arranged between the end cover and the gland, and rubber rings and water-expandable water-stop rings are alternately arranged between adjacent pressure rings; A pipe joint is provided on the outer sleeve of the end of the main pipe close to one end of the gland, and the gland and the pipe joint are both connected to the main pipe through threads.

2. The multifunctional drainage hole orifice device with an adaptive irregular hole wall structure according to claim 1, characterized in that: The main pipe is connected to a reducing elbow through a pipe joint, and the reducing elbow is connected to a straight pipe; the middle of the straight pipe is connected to a pressure gauge and a flow control valve in sequence, and the end is connected to a hose or an elbow.

3. The multifunctional drainage hole orifice device with an adaptive irregular hole wall structure according to claim 1, characterized in that: The gland is provided with a threaded hole for a wrench to clamp.

4. The multifunctional drainage hole orifice device with an adaptive irregular hole wall structure according to claim 1, characterized in that: The end cover and the main pipe adopt an integrally formed structure.

5. The multifunctional drainage hole orifice device with an adaptive irregular hole wall structure according to claim 1, characterized in that: The diameter of the drainage hole is 91mm.

6. The multifunctional drainage hole opening device with self-adaptive irregular hole wall structure according to claim 5, characterized in that: The main pipe has a fine thread at one end close to the gland, with a length of 500 mm. The main pipe has an outer diameter of 63 mm and an inner diameter of 48 mm.

7. The multifunctional drainage hole orifice device with an adaptive irregular hole wall structure according to claim 6, characterized in that: The outer diameter of the gland is 130mm and the inner diameter is 63mm; the outer diameter of the threaded pipe joint is 90mm and the inner diameter is 63mm.

8. The multifunctional drainage hole orifice device with an adaptive irregular hole wall structure according to claim 6, characterized in that: The outer diameter of the rubber ring is 91 mm, and the inner diameter is 63 mm; the outer diameter of the pressure ring is 90 mm, and the inner diameter is 63 mm.

9. The multifunctional drainage hole orifice device with an adaptive irregular hole wall structure according to claim 6, characterized in that: The water-expandable water-stop ring has a rectangular or "O"-shaped cross-section and an inner diameter of 63 mm.

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