Single-pipe capsule type grouting hole sealing device

Abstract

The utility model discloses a single-pipe capsule type grouting hole sealing device which comprises a grouting pipe, a grout outlet pipe, an inflation capsule and a one-way check valve. A grouting opening is formed in the portion, between every two adjacent inflation capsules, of the grout outlet pipe, and the grouting openings are covered and sealed through an elastic pressure belt. According to the scheme, during operation, the air bag is inflated and expanded to block the grouting space, and then the grouting space is subjected to grouting sealing, so that the resistance between the structure and the hole wall can be increased through the high friction force on the surface of the air bag and the action of materials such as cement mortar in the grouting space, and the blasting effect can be effectively improved; and meanwhile, the grouting space can be regulated and controlled by flexibly controlling the length of the grout outlet pipe according to actual engineering requirements. The scheme has the characteristics of simplicity in operation, convenience in device installation, safety, reliability, high practicability and high efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel engineering, in particular to a single-tube capsule-type grouting and sealing device. Background Art

[0002] Current research shows that the sealing of blastholes can affect the final effect of blasting. Reasonable sealing can prolong the action time of explosive gas, improve the utilization rate of explosive explosion energy, reduce flying rocks and harmful gases, reduce the risk of gas, dust and other explosions, and improve the blasting effect. Among the existing sealing technologies, capsule sealing devices have unique advantages. Capsule sealing technology uses multi-stage rubber seals to give full play to its expansion and recovery functions to achieve the sealing of blastholes. This process has better sealing quality, no other chemical materials are used, can effectively ensure the safety of operators themselves, and has a great improvement in improving blasting effects.

[0003] Blast hole sealing technology is widely used in tunnel construction. However, as the tunnel construction environment becomes increasingly complex, the interaction between the two tunnels during simultaneous blasting construction and the impact on the stability of the surrounding rock are very complex, the construction is difficult and risky, and seriously threatens construction safety and normal progress.

[0004] Under the above background, the current capsule-type hole sealing device is cumbersome to operate, and the existing blasthole sealing technology is complicated to operate. In projects such as the above tunnel construction, the on-site working conditions are complicated. The current capsule-type hole sealing device has a fixed length of sealing, and cannot flexibly set the sealing length according to the blasthole requirements under different working conditions, resulting in unsatisfactory final sealing effect. Traditional and inefficient blasthole sealing technology can no longer meet the development requirements of modern blasting technology. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a single-tube capsule grouting and sealing device, which can realize flexible and efficient grouting and sealing.

[0006] The scheme of the utility model includes a grouting pipe, one end of which is connected to the injection equipment and the other end is connected to a slurry outlet pipe, the slurry outlet pipe is a plurality of sections connected in series and the free end of the last section is sealed, a plurality of inflatable capsules placed in blast holes are strung on the slurry outlet pipe, an inflatable mounting hole is provided on the inflatable capsule, a one-way check valve is installed on the inflatable mounting hole; a section of the slurry outlet pipe is connected between two adjacent inflatable capsules via a detachable connecting port and the section of the slurry outlet pipe is provided with a grouting port, and the grouting port is covered and sealed by an elastic pressure belt.

[0007] Furthermore, a pressure gauge for detecting the pressure inside the pipe is installed on the grouting pipe.

[0008] Furthermore, the slurry outlet pipe is connected to the grouting pipe (1) by disassembling a screw thread.

[0009] Furthermore, the one-way check valve includes an annular platform sealed and embedded in the inflation mounting hole, the center portion of the annular platform protrudes upward to form a tubular structure, the tubular structure is provided with an inflation hole connected to the space inside the inflatable capsule, the top of the tubular structure is a rubber cap, the outer edge of the annular platform is provided with a groove, and the bottom of the groove and the edge of the rubber cap are tightened by a spring.

[0010] Furthermore, the grouting pipe and the slurry outlet pipe are both seamless steel pipes.

[0011] Furthermore, the inflatable capsule is made of antistatic rubber material.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] (1) The utility model is composed of a plurality of inflatable capsules. When working, two inflatable capsules are inflated first, so that the inflatable capsules expand and seal to form a reserved grouting space, and then the reserved grouting space is grout-sealed. The utility model has the characteristics of simple operation, good sealing effect, safety and reliability, strong applicability and high efficiency.

[0014] (2) The length of the slurry outlet pipe can be flexibly controlled according to the actual needs of the project and can be applied to most blasthole plugging situations.

[0015] (3) The grouting pipe, the air-filled capsule and the slurry outlet pipe are assembled to form an overall sealing device. Each sealing component is small in size, which is convenient for on-site construction operations. It can also be purchased and stored in large quantities, which reduces construction costs. The sealing effect is excellent, which is convenient for large-scale promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of on-site installation of an embodiment of the utility model.

[0017] Figure 2 The utility model is a schematic structural diagram of a one-way check valve in an embodiment.

[0018] In the figure: 1. Grouting pipe; 2. Pressure gauge; 3. Disassembly screw; 4. Inflatable airbag; 5. Inflatable mounting hole; 6. One-way check valve; 7. Grouting port; 8. Elastic pressure belt; 9. Reserved grouting space; 10. Removable connection port; 11. Rock mass; 12. Ring platform; 13. Rubber cap; 14. Inflatable hole; 15. Grouting pipe; 16. Blast hole. DETAILED DESCRIPTION

[0019] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0020] However, at present, capsule-type sealing devices are cumbersome to operate, and the internal pipelines of the device are complex. There are high requirements for the operating ability of personnel when using the device. The overall cost of using the device is high, and the sealing length is fixed, and the sealing length cannot be flexibly set according to the needs of the blasthole.

[0021] like Figure 1 As shown, a single-tube capsule grouting and sealing device comprises a grouting pipe 1, one end of the grouting pipe 1 is connected to the injection equipment, and the other end is connected to a slurry outlet pipe 15, the slurry outlet pipe 15 is a plurality of sections connected in series and the free end of the last section is sealed, a plurality of inflatable capsules 4 placed in blast holes 16 are strung on the slurry outlet pipe 15, an inflatable mounting hole 5 is provided on the inflatable capsule 4, a one-way check valve 6 is installed on the inflatable mounting hole 5; a section of the slurry outlet pipe 15 is connected between two adjacent inflatable capsules 4 via a detachable connecting port 10, and a grouting port 7 is provided on the section of the slurry outlet pipe 15, the grouting length is controlled by the detachable section of the slurry outlet pipe 15, and the grouting port 7 is covered and sealed by an elastic pressure belt 8.

[0022] The grouting material can be cement mortar, concrete, yellow mud, polyurethane and other non-Newtonian fluids. After the two ends of the blasthole 16 drilled in the rock mass 11 are sealed by expanding the inflatable capsule 4, the non-Newtonian fluid sealing material is injected into the reserved grouting space 9. The non-Newtonian fluid can be well combined with the hole wall, thereby sealing the cracks around the blasthole 16, improving the sealing effect, and ensuring the residence time of the explosive gas.

[0023] Preferably, a pressure gauge 2 for detecting the pressure inside the pipe is installed on the grouting pipe 1 to facilitate reading the pressure inside the pipe for controlling inflation and grouting control. When the maximum threshold of the elastic pressure band 8 is reached, the elastic pressure band 8 is opened, and the reading on the pressure gauge 2 drops sharply, then inflation is ended and grouting begins.

[0024] Preferably, the slurry outlet pipe 15 is connected to the grouting pipe 1 by disassembling the screw port 3 , so as to facilitate the extension of the pipeline length and replace the connection between the grouting pipe 1 and the slurry outlet pipe 15 .

[0025] like Figure 2As shown, a single-tube capsule grouting sealing device is characterized in that the one-way check valve 6 includes an annular platform 12 which is sealed and embedded in the inflation mounting hole 5, the center portion of the annular platform 12 protrudes upward to form a tubular structure, the tubular structure is provided with an inflation hole 14 which is connected to the space inside the inflatable capsule 4, the top of the tubular structure is a rubber cap 13, the outer edge of the annular platform 12 is provided with a groove, and the bottom of the groove and the edge of the rubber cap 13 are tightened by a spring.

[0026] The one-way check valve 6 is arranged at the central opening of the slurry outlet pipe 15 between the two inflatable capsules 4, and the rubber cap 13 faces the inside of the inflatable capsule 4. When the one-way check valve 6 is not under stress, it is in a closed state due to the tension of the spring. When the air pressure in the grouting pipe 1 rises, the spring is pushed open to start injecting air into the inflatable capsule 4 through the inflation hole 14. After the inflation is completed, the air pressure inside the inflatable capsule 4 and the spring tension work together to achieve closure, ensuring that the air inside the inflatable capsule 4 is filled with gas. After the grouting starts, the air pressure inside the inflatable capsule 4 is greater than the pressure inside the grouting pipe 1, and the one-way check valve 6 is still in a closed state, which can ensure that the gas will not leak into the grouting pipe 1, thereby improving the grouting quality.

[0027] Preferably, the grouting pipe 1 and the slurry outlet pipe 15 are both seamless steel pipes, because seamless steel pipes are less likely to deform than drawn steel pipes and have lower costs.

[0028] Preferably, the inflatable capsule 4 is made of antistatic rubber material, and its maximum pressure should reach 1.5 MPa; the maximum pressure that the elastic sealing belt can withstand should reach 1.2 MPa.

[0029] The working steps of the specific implementation method of the utility model are:

[0030] Step 1: Determine the sealing length according to the project requirements, reserve the grouting space 9, and assemble the grouting pipe 1, the inflatable capsule 4 and the grouting pipe 15;

[0031] Step 2: Start to inflate the grouting pipe 1 to inflate the two inflatable capsules 4 and seal the blast hole 16. The two inflatable capsules 4 seal to form a reserved grouting space 9;

[0032] Step 3: Then, by observing the pressure gauge 2, slow down the inflation rate when the pressure reaches 1.0 MPa, until the pressure indication reaches about 1.2 MPa, the elastic pressure belt 8 is opened, and the inflation is stopped when the pressure indication drops sharply;

[0033] Step 4: Replace the grouting filling equipment and start grouting; continue grouting until the grouting is completed, disassemble the grouting pipe 1, and seal the disassembly screw 3 to complete the hole sealing.

[0034] The utility model effectively solves the shortcomings of the prior art and provides a single-tube capsule grouting sealing device which is simple, easy to operate, has good sealing effect, is safe and reliable, has strong practicality and high efficiency. It adopts an adjustable slurry outlet pipe and can flexibly adjust the sealing length according to the actual construction situation to ensure the sealing effect.

[0035] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A single-tube capsule grouting and sealing device, characterized in that: The invention comprises a grouting pipe (1), one end of which is connected to a grouting device and the other end of which is connected to a grouting pipe (15), wherein the grouting pipe (15) is composed of multiple sections connected in series and the free end of the last section is sealed, and the grouting pipe (15) is connected in series with multiple inflatable capsules (4) placed in blast holes (16), and the inflatable capsules (4) are provided with inflating installation holes (5), and a one-way check valve (6) is installed on the inflating installation hole (5); a section of the grouting pipe (15) is connected between two adjacent inflatable capsules (4) via a detachable connecting port (10), and the section of the grouting pipe (15) is provided with a grouting port (7), and the grouting port (7) is covered and sealed by an elastic pressure belt (8).

2. A single-tube capsule grouting and sealing device according to claim 1, characterized in that: The grouting pipe (1) is provided with a pressure gauge (2) for detecting the pressure inside the pipe.

3. A single-tube capsule grouting and sealing device according to claim 1, characterized in that: The slurry outlet pipe (15) is connected to the grouting pipe (1) via a disassembly screw (3).

4. A single-tube capsule grouting and sealing device according to claim 1, characterized in that: The one-way check valve (6) comprises an annular platform (12) which is sealed and embedded in the inflation installation hole (5); the center of the annular platform (12) protrudes upward to form a tubular structure; the tubular structure is provided with an inflation hole (14) which is connected to the space inside the inflatable capsule (4); the top of the tubular structure is a rubber cap (13); the outer edge of the annular platform (12) is provided with a groove; the bottom of the groove and the edge of the rubber cap (13) are tightened by a spring.

5. A single-tube capsule grouting and sealing device according to any one of claims 1 to 4, characterized in that: The grouting pipe (1) and the slurry outlet pipe (15) are both seamless steel pipes.

6. A single-tube capsule grouting and sealing device according to any one of claims 1 to 4, characterized in that: The inflatable capsule (4) is made of antistatic rubber material.

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