Water injection expansion type orifice sealer

Abstract

The utility model provides a water injection expansion type orifice sealer, which relates to the technical field of fully weathered and strongly weathered granite curtain grouting orifice sealing grouting, and comprises a connecting cylinder, an internal water injection expander, an external water injection expander and a fixing component, the connecting cylinder comprises a first cylinder body and a second cylinder body which are communicated with each other, and an upper-section water injection hole and a lower-section water injection hole are formed in the connecting cylinder; the internal water injection expander is arranged in the first barrel and comprises upper-section water injection expansion rubber communicated with the upper-section water injection hole; the external water injection expander is arranged on the second barrel and comprises lower-section water injection expansion rubber communicated with the lower-section water injection hole; the fixing assembly is used for fixing the external water injection expander to the second barrel. The water injection expansion type orifice sealer can achieve the effects of rapid on-site assembly, smooth descending of a drill rod, low economic cost, excellent grout stopping effect, high durability and environmental protection.

Description

Technical Field

[0001] The utility model relates to the technical field of curtain grouting hole sealing grouting of fully weathered and strongly weathered granite, in particular to a water injection expansion type hole sealer. Background Art

[0002] Pumped hydropower storage plays a vital role in promoting the sustainable development of renewable energy and the transition to a low-carbon economy. The development of pumped hydropower storage not only helps improve grid stability, optimize the utilization efficiency of renewable energy, and reduce energy curtailment, but also ensures energy supply security and environmental sustainability. The effectiveness of dam foundation anti-seepage reinforcement directly impacts the effectiveness of pumped hydropower storage. Grouting technology is often used for dam foundation anti-seepage reinforcement in engineering practice. However, in areas with weak and severely weathered strata, slurry often overflows from the orifice during the grouting process. This slurry escape causes a drop in grouting pressure, making it impossible to effectively seal cracks or pores, seriously affecting the dam's anti-seepage reinforcement effectiveness.

[0003] Currently, orifice sealers are widely used to prevent grouting from orifices. Existing orifice sealers typically utilize cylindrical rubber stoppers. However, in actual construction, the drill rod connected to the grouting pipe often has difficulty lowering through these sealers due to excessive friction. Even if external force is applied to force the drill rod through the rubber column, this can cause wear, deformation, or even damage to the rubber stopper. As grouting pressure increases, the stopper can become less effective, failing to meet grouting requirements. Utility Model Content

[0004] In view of this, the utility model proposes a water-injection expansion type orifice sealer, which can solve the problem that due to the wear, deformation or even damage of the rubber plug, the grouting effect is easily loose as the grouting pressure increases, thereby failing to meet the grouting requirements.

[0005] The technical solution of the present utility model is achieved as follows:

[0006] The utility model provides a water injection expansion type orifice sealer, comprising:

[0007] The connecting tube comprises a first cylinder body and a second cylinder body which are connected to each other, and an upper water injection hole and a lower water injection hole are opened on the connecting tube;

[0008] an internal water injection expander, disposed in the first cylinder, the internal water injection expander comprising an upper water injection expansion rubber connected to the upper water injection hole;

[0009] an external water injection expander, provided on the second cylinder, the external water injection expander comprising a lower section water injection expansion rubber communicating with the lower section water injection hole; and

[0010] A fixing assembly is used to fix the external water injection expander on the second cylinder.

[0011] On the basis of the above technical solution, preferably, one end of the first cylinder away from the second cylinder is connected to a sleeve, and a handle is provided on the outside of the sleeve.

[0012] More preferably, two handles are provided, and the two handles are respectively provided on both sides of the sleeve in the radial direction, and the distance between the end of the handle away from the sleeve and the central axis of the sleeve is greater than the diameter of the first cylinder.

[0013] On the basis of the above technical solution, preferably, the inner diameter of the first cylinder is larger than the inner diameter of the second cylinder, and the inner diameter of the first cylinder is larger than the inner diameter of the sleeve.

[0014] More preferably, a wheel-shaped structure is provided in the first cylinder, and the wheel-shaped structure is used to cooperate with the upper water-injection expansion rubber.

[0015] On the basis of the above technical solution, preferably, the fixing assembly includes an upper end fixer and a lower end fixer provided on the second cylinder, and the upper end fixer and the lower end fixer are respectively provided on both sides of the external water injection expander.

[0016] More preferably, the upper end fixer and the lower end fixer are both welded to the second cylinder.

[0017] On the basis of the above technical solution, preferably, the second cylinder is connected to a slurry return pipe, and the slurry return pipe is located between the internal water injection expander and the external water injection expander.

[0018] More preferably, a valve is provided on the slurry return pipe.

[0019] On the basis of the above technical solution, preferably, it further comprises a fixing cylinder, which is used to be fixed at the orifice, and is solidified by pouring cement slurry, and the external water injection expander cooperates with the fixing cylinder.

[0020] The water injection expansion type orifice sealer of the utility model has the following beneficial effects compared with the prior art:

[0021] (1) The upper section water injection rubber is inflated by water injection through the upper section water injection hole, so that the orifice diameter of the upper section water injection rubber is gradually reduced and used for being closely combined with the grouting pipe, thereby generating and increasing the friction force, effectively promoting the lowering of the grouting pipe, and avoiding the problems of damage to the structure of the orifice packer and poor grouting stopping effect in the process of lowering the drill pipe or the grouting pipe.

[0022] (2) The back grouting pipe is provided, and the back grouting pipe can be adjusted according to whether back grouting is needed in actual construction, so as to achieve the function of multi-purpose use.

[0023] (3) When the curtain grouting construction is performed on the fully weathered and strongly weathered granite stratum, if the stratum is broken, the strength of the external water injection expander and the hole wall is low, and the fixing effect is poor, the fixing cylinder can be installed at the orifice, the fixing cylinder is fixed around the orifice by pouring cement grout, and then the external water injection expander is fixed in the fixing cylinder, so as to enhance the fixing effect and improve the use range of the device. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0025] Figure 1 It is a front view of the water injection expansion type orifice packer of the present application.

[0026] Figure 2 It is a side view of the water injection expansion type orifice packer of the present application.

[0027] Figure 3 It is a top view of the water injection expansion type orifice packer of the present application.

[0028] Figure 4 It is a schematic diagram of the water injection expansion type orifice packer of the present application in use.

[0029] Reference signs:

[0030] 1. Handle; 2. Upper water injection hole; 3. Internal water injection expander; 4. Return slurry pipe; 5. Lower water injection hole; 6. Upper end fixture; 7. External water injection expander; 8. Lower end fixture; 9. Upper water injection expansion rubber; 10. Lower water injection expansion rubber; 11. Fixing assembly; 12. Connecting tube; 13. First cylinder; 14. Second cylinder; 15. Sleeve. DETAILED DESCRIPTION

[0031] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] like Figures 1 to 4 As shown, the utility model provides a water injection expansion type orifice closure device, which includes a connecting tube 12, an internal water injection expander 3, an external water injection expander 7 and a fixing assembly 11. The connecting tube 12 includes a first cylinder 13 and a second cylinder 14 that are connected to each other. The connecting tube 12 is provided with an upper water injection hole 2 and a lower water injection hole 5. The interior of the connecting tube 12 is a hollow structure, which is convenient for lowering the drill rod and the grouting pipe; the internal water injection expander 3 is arranged in the first cylinder 13, and the internal water injection expander 3 includes an upper water injection expansion rubber 9 connected to the upper water injection hole 2; the external water injection expander 7 is arranged on the second cylinder 14, and the external water injection expander 7 includes a lower water injection expansion rubber 10 connected to the lower water injection hole 5; the fixing assembly 11 is used to fix the external water injection expander 7 on the second cylinder 14.

[0033] The upper section of the water-injection expansion rubber 9 in the water-injection expansion orifice sealer is pressurized and expanded by water injection through the upper section water injection hole 2, causing the orifice diameter of the upper section water-injection expansion rubber 9 to gradually decrease and fit tightly with the grouting pipe, thereby generating and increasing friction, effectively promoting the lowering of the grouting pipe, and avoiding damage to the orifice sealer structure and poor grouting effect during the lowering of the drill rod or grouting pipe. At the same time, the lower section of the water-injection expansion rubber 10 is pressurized and expanded by water injection through the lower section water injection hole 5, causing its diameter to increase and fit tightly with the hole wall, thereby increasing friction and achieving stable fixation of the water-injection expansion orifice sealer in the hole.

[0034] The water-injection expansion orifice sealer features a simple structure, requiring minimal manpower and material resources during installation. During installation, the orifice sealer's large aperture facilitates lowering of the grouting pipe. After installation, water injection expands the interior, achieving a seal and securing the seal. Due to its short construction period and easy assembly, the orifice sealer demonstrates high efficiency during on-site operation.

[0035] In the construction and construction process, the building materials required by the water injection expansion type port closure device are less, and the internal structure is not completely solid, the overall weight is lighter, and the economic cost is lower. Compared with the traditional rubber cylinder type closure device which seals the drill pipe by friction, the water injection expansion type port closure device can increase the friction between the drill pipe after pressurized expansion, so as to realize more reliable sealing effect and more excellent mud stopping performance.

[0036] The application adopts water injection expansion technology to adjust the hole diameter of the port closure device, which avoids the wear and deformation caused by the direct contact between the rubber plug and the drill pipe in the traditional port closure device, so it has a longer service life. In addition, the material of the connecting cylinder 12 in the application can be steel, so that the main material of the port expansion device is steel, which is simple in structure and low in material consumption, significantly reducing the use of conventional building materials such as iron ore, reducing the emission of industrial waste and harmful gases (such as sulfur dioxide) generated in the smelting process. Because the water injection expansion type port closure device is not easy to damage or deform during construction, it also greatly reduces the generation of waste rubber and reduces the consumption of non-renewable resources such as oil in the rubber production process. Therefore, the use of the port closure device not only helps to reduce the economic cost and improve the durability, but also effectively protects the environment.

[0037] In summary, the water injection expansion type port closure device provided by the application can achieve the goals of rapid assembly on site, smooth drill pipe lowering, low economic cost, excellent mud stopping effect, strong durability, and green environmental protection.

[0038] As shown in Figures 1 to 4 The second cylinder body 14 is communicated with a back mud pipe 4, and the back mud pipe 4 is located between the internal water injection expander 3 and the external water injection expander 7. The back mud pipe 4 can be adjusted according to whether back mud is needed in actual construction to achieve the function of multifunctional use. The back mud pipe 4 can be provided with a valve to control the communication and disconnection of the back mud pipe 4.

[0039] For the convenience of description, the water injection expansion type port closure device is divided into an upper segment, a middle segment and a lower segment in the length direction of the water injection expansion type port closure device. The part between the internal water injection expander 3 and the external water injection expander 7 of the second cylinder body 14 is the middle segment, the part above the middle segment is the upper segment, and the part below the middle segment is the lower segment. The first cylinder body 13 is located above the middle segment, and the external water injection expander 7 is located below the middle segment.

[0040] The end of the first barrel 13 away from the second barrel 14 is connected to a sleeve 15. The sleeve 15 is provided with a handle 1 on the outside. The sleeve 15 is used to install the handle 1. The interior of the sleeve 15 is connected to the connecting barrel 12, thereby ensuring the stability of the grouting pipe during lowering. The provision of the handle 1 facilitates the operation of the orifice sealer and facilitates on-site construction operations.

[0041] In order to ensure the reliability of the device, the internal apertures of the upper, middle and lower sections of the orifice sealer are kept consistent, and the sections are fixedly connected.

[0042] The handles 1 may also be provided with two, one on each radial side of the sleeve 15, with the distance between the end of the handle 1 away from the sleeve 15 and the central axis of the sleeve 15 being greater than the diameter of the first cylindrical body 13. Thus, the handles 1 can rest on the surface of the hole, providing support and limiting action, thereby preventing the sealer from falling into the hole during construction. Furthermore, the symmetrical arrangement of the two handles 1 ensures a support effect when resting on the surface of the hole, ensuring the reliability of the device during use.

[0043] In order to ensure the overall structural strength, the sleeve 15 can be welded to the end of the first cylinder 13, and the handle 1 is welded to the sleeve 15. The middle upper section is fixedly connected to the internal water injection expander 3 of the upper section, and the fixed connection can be achieved by welding.

[0044] The inner diameter of the first cylindrical body 13 is larger than the inner diameter of the second cylindrical body 14, and the inner diameter of the first cylindrical body 13 is larger than the inner diameter of the sleeve 15. The interior of the first cylindrical body 13 can accommodate the upper water-injection expansion rubber 9, and can also ensure the internal diameter of the upper water-injection expansion rubber 9 when not injected with water, ensuring that the grouting pipe can pass through and be lowered stably. When water is injected into the upper water-injection expansion rubber 9 through the upper water injection hole 2, the pore diameter of the upper water-injection expansion rubber 9 is reduced under the restriction of the first cylindrical body 13, which has the effect of sealing the orifice.

[0045] A wheel-like structure is disposed within the first cylinder 13. This wheel-like structure is designed to cooperate with the upper water-injection expansion rubber 9. The orifice is sealed internally, and water is injected into the upper water-injection expansion rubber 9 through the upper water injection hole 2. A wheel-like structure is a structure formed by a plurality of interconnected rays extending outward from a central point. This wheel-like structure can be used to support, connect, or serve as the foundation for certain mechanical components. Its symmetry and uniform distribution provide excellent mechanical properties and structural stability. The wheel-like structure houses and cooperates with the upper water-injection expansion rubber 9, allowing it to expand internally to perform its function.

[0046] like Figures 1 to 4As shown, the fixing assembly 11 is used to fix the external water injection expander 7 on the second cylinder 14. The fixing assembly 11 can be a snap-fit ​​component, etc. In this application, the fixing assembly 11 includes an upper end fixer 6 and a lower end fixer 8 provided on the second cylinder 14. The upper end fixer 6 and the lower end fixer 8 are respectively provided on both sides of the external water injection expander 7. The position of the external water injection expander 7 is fixed by the clamping action of the upper end fixer 6 and the lower end fixer 8, thereby ensuring the reliability of its water injection expansion effect. Of course, the lower water injection hole 5 can also be provided on the upper end fixer 6.

[0047] Specifically, the upper end retainer 6 is used to secure the upper end of the lower water-injection expansion rubber 10, while the lower end retainer 8 is used to secure the lower end of the lower water-injection expansion rubber 10. Both the upper end retainer 6 and the lower end retainer 8 are welded to the second cylinder 14. Furthermore, the lower portion of the middle section is secured to the upper end retainer 6 by welding.

[0048] Of course, the water-injection expansion orifice sealer also includes a fixing cylinder, which can be a steel cylinder. The fixing cylinder is used to be fixed at the orifice and is solidified by pouring cement slurry. The external water-injection expander 7 cooperates with the fixing cylinder. When curtain grouting is performed on fully weathered or strongly weathered granite formations, if the formation is broken, resulting in low strength between the external water-injection expander 7 and the hole wall and poor fixing effect, a fixing cylinder can be installed at the orifice and solidified by pouring cement slurry around the fixing cylinder. The external water-injection expander 7 is then fixed within the fixing cylinder to enhance the fixing effect.

[0049] The water injection expansion type orifice sealer provided in this application can be used in accordance with the following steps:

[0050] Step S1: Connect the water injection pressure equipment to the upper water injection hole 2 and the lower water injection hole 5 of the water injection expansion orifice sealer respectively;

[0051] Step S2: Place the water-inflatable closure into the hole using the handle 1, which can rest on the surface of the hole;

[0052] Step S3: Water is injected into the lower water injection hole 5 using a water injection pressure device to expand the lower water injection expansion rubber 10 and fix it to the hole wall. If the stratum is severely broken and has low strength, a fixing tube can be installed in the hole mouth, and cement slurry is poured around the fixing tube to consolidate it. Then, the hole mouth sealer is fixed in the fixing tube to enhance the fixing effect.

[0053] Step S4: After the sealer is fixed in the hole, drill the drill rod or grouting pipe from below the upper section of the sealer, and then inject water into the upper water injection hole 2, so that the upper water injection expansion rubber 9 expands and seals the hole;

[0054] Step S5: performing post-hole sealing and grouting.

[0055] like Figures 1 to 4 As shown, in summary, the embodiment of the present application provides a water-injection expansion type orifice closure device, which adopts the method of internal rubber water injection and pressure expansion. After the upper section water injection expansion rubber 9 is filled with water, the upper end orifice diameter is gradually reduced and closely fits the grouting pipe, thereby generating and increasing friction, effectively promoting the lowering of the grouting pipe, avoiding the damage to the orifice closure structure and the problem of poor grouting effect during the lowering of the drill rod. At the same time, the external water injection and pressure expansion method is adopted. After the lower section water injection expansion rubber 10 is filled with water, the lower end orifice diameter is increased and closely fits the hole wall, thereby enhancing friction and achieving the fixation of the closure device in the hole. In order to improve the versatility of the closure device, the present application sets a return grouting pipe 4 in the middle section, and according to the needs of the site, a valve can be added to the return grouting pipe 4 to flexibly control whether to perform the return grouting operation. The water-injection expansion type orifice closure device can solve the problem that the grouting effect is prone to being loose as the grouting pressure increases due to the wear, deformation or even damage of the rubber plug, thereby failing to meet the grouting requirements.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A water injection expansion orifice closure device, characterized in that: include: The connecting tube (12) comprises a first tube body (13) and a second tube body (14) which are connected to each other. The connecting tube (12) is provided with an upper water injection hole (2) and a lower water injection hole (5); An internal water injection expander (3) is arranged in the first cylinder (13), and the internal water injection expander (3) includes an upper water injection expansion rubber (9) connected to the upper water injection hole (2); an external water injection expander (7) disposed on the second cylinder (14), the external water injection expander (7) comprising a lower water injection expansion rubber (10) communicating with the lower water injection hole (5); and A fixing assembly (11) is used to fix the external water injection expander (7) on the second cylinder (14).

2. The water-injection expansion orifice closure device according to claim 1, characterized in that: One end of the first cylinder (13) away from the second cylinder (14) is connected to a sleeve (15), and a handle (1) is provided on the outside of the sleeve (15).

3. The water-injection expansion orifice closure device according to claim 2, characterized in that: Two handles (1) are provided, and the two handles (1) are respectively provided on both sides of the sleeve (15) in the radial direction, and the distance between the end of the handle (1) away from the sleeve (15) and the central axis of the sleeve (15) is greater than the diameter of the first cylinder (13).

4. The water-injection expansion orifice closure device according to claim 2, wherein: The inner diameter of the first cylinder (13) is greater than the inner diameter of the second cylinder (14), and the inner diameter of the first cylinder (13) is greater than the inner diameter of the sleeve (15).

5. The water-injection expansion orifice closure device according to claim 4, characterized in that: A wheel-shaped structure is provided in the first cylinder (13), and the wheel-shaped structure is used to cooperate with the upper water-injected expansion rubber (9).

6. The water-injection expansion orifice closure device according to claim 1, wherein: The fixing assembly (11) comprises an upper end fixer (6) and a lower end fixer (8) arranged on the second cylinder (14), and the upper end fixer (6) and the lower end fixer (8) are respectively arranged on both sides of the external water injection expander (7).

7. The water-injection expansion orifice closure device according to claim 6, characterized in that: The upper end fixer (6) and the lower end fixer (8) are both welded to the second cylinder (14).

8. The water-injection expansion orifice closure device according to claim 1, wherein: The second cylinder (14) is connected to a slurry return pipe (4), and the slurry return pipe (4) is located between the internal water injection expander (3) and the external water injection expander (7).

9. The water-injection expansion orifice closure device according to claim 8, characterized in that: The slurry return pipe (4) is provided with a valve.

10. The water-inflatable orifice closure device according to claim 1, wherein: It also includes a fixing cylinder, which is used to be fixed at the orifice. The fixing cylinder is solidified by pouring cement slurry, and the external water injection expander (7) cooperates with the fixing cylinder.

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