Bolting and grouting integrated intelligent grouting system

Abstract

The utility model discloses a bolting and grouting integrated intelligent grouting system, and belongs to the technical field of anchoring. The hole packer comprises a grouting pipe (3), an outer expansion pipe (1), an inner expansion pipe (4) and a limiting supporting device (6), the outer expansion pipe (1) is arranged outside the inner expansion pipe (4) in a sleeving mode and connected with the limiting supporting device (6), and the grouting pipe (3) is arranged in a gap between the outer expansion pipe (1) and the inner expansion pipe (4) in a penetrating mode. The system comprises a raw material barrel (10), a grouting pump (9), a flow sensor (8), an electromagnetic valve (7) and a mining grouting hole packer which are sequentially connected, wherein the grouting pump (9), the flow sensor (8) and the electromagnetic valve (7) are electrically connected with a quantitative control instrument (11). Actually, the anchor rod and the anchor cable can be placed into a hole together with the hole packer to seal the hole in a self-expanding manner. And meanwhile, precise grouting is achieved through closed-loop control. The problems that an existing grouting system is high in working requirement for constructors, low in efficiency and incapable of meeting production requirements are solved.

Description

Technical Field

[0001] The utility model discloses an integrated anchor injection intelligent grouting system, belonging to the field of anchoring technology. Background Technique

[0002] The integrated anchor injection support technology is currently widely used in underground engineering, geotechnical slopes, tunnel engineering and other fields. Compared with the traditional support method, its support stability and reliability are higher, which can improve the overall safety of the project. The traditional anchoring process is divided into six stages: 1. The initial spraying reinforcement stage; 2. The steel mesh reinforcement stage; 3. The end anchoring stage of the hollow grouting bolt (hollow grouting cable); 4. The grouting support stage; 5. The re-spraying reinforcement stage; 6. The floor laying stage; In the third stage, the end anchoring process is complex. Put the resin anchoring agent package at the bottom of the drill hole and use a stirring machine to stir quickly and fully, quickly insert the hollow grouting bolt (hollow grouting cable) into the hole. Before the resin anchoring agent is completely cured, rotate the hollow grouting bolt (hollow grouting cable) to make it fully adhere to the resin anchoring agent, and then install anchor fittings such as a grout stop plug, a tray, and a nut in sequence.

[0003] At present, a hole sealer is used for grouting on the market. The main structure of the traditional hole sealer is a metal pipe. Its grouting channel is in the center, and there is a rubber tube outside. The rubber tube and the metal pipe are pressed together by two metal structures at both ends, so that there is an expandable space between the rubber tube and the metal pipe. There are holes in the middle section of the metal pipe for the purpose of allowing the slurry to flow from the metal pipe into the expandable space between the rubber tube and the metal pipe. There is also a slurry outlet device at the other end of the hole sealer. However, the existing one cannot achieve the integration of anchor injection. Because it cannot insert a bolt or a cable, but it can also grout and seal the hole. By connecting a grouting machine, the slurry enters the hole sealer and then makes it expand, thereby sealing the bolt (cable) hole. When the pressure reaches a certain value, the slurry outlet device at the other end of the hole sealer will discharge slurry, and the slurry will then be injected into the bolt (cable) hole. There is currently no hole sealer on the market that can integrate grouting and anchoring. At the same time, in practical applications, there are also some pain points in the integrated anchor injection support technology. For example, the existing integrated anchor injection construction process is complex, has high requirements for construction personnel, and the anchor injection integrated construction process needs to be optimized. At the same time, the existing construction equipment can no longer meet the production needs, and more automated and intelligent construction equipment is needed to improve construction efficiency. The commonly used cement-based grouting and anchoring materials often have certain defects in actual use, such as low early strength, long initial setting time, and high cost. Therefore, in actual reinforcement projects, it generally needs to be modified before it can be used. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is that the existing hole plugging device does not cooperate with the bolt, resulting in poor anchoring strength, and the grouting system has high requirements for construction personnel, low efficiency, and cannot meet the production needs.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a mine grouting hole plugging device, including a grouting pipe, an outer expansion pipe, an inner expansion pipe and a limit support device. The outer expansion pipe is sleeved outside the inner expansion pipe. The limit support devices are arranged at intervals, and both ends of the outer expansion pipe are hermetically connected to the limit support devices respectively. Both ends of the inner expansion pipe are penetrated through the limit support devices. The grouting pipe is penetrated through the limit support devices along the gap between the outer expansion pipe and the inner expansion pipe, and grouting holes are arranged on the penetrated section of the grouting pipe, and a slurry outlet device is arranged at the penetrated end.

[0006] Among them, in the above structure, both ends of the outer expansion pipe are sleeved on the limit support devices arranged at intervals.

[0007] Furthermore, a locking buckle is further included in the above structure. The locking buckle is sleeved on the end of the outer expansion pipe, and the outer expansion pipe is hermetically connected to the limit support device.

[0008] Among them, in the above structure, the outer expansion pipe is made of rubber material.

[0009] Among them, in the above structure, the inner expansion pipe is made of rubber material.

[0010] An integrated bolt-grouting intelligent grouting system includes a raw material barrel, a grouting pump, a flow sensor, a quantitative controller, a solenoid valve and any mine grouting hole plugging device. The raw material barrel, the grouting pump, the flow sensor and the solenoid valve are connected in sequence, and the grouting pump, the flow sensor and the solenoid valve are respectively electrically connected to the quantitative controller. The other end of the solenoid valve is connected to the grouting pipe of the mine grouting hole plugging device.

[0011] Among them, a one-way valve is arranged at the feeding end of the grouting pipe in the above system.

[0012] The beneficial effects of the utility model are as follows: This structure can actually directly place the bolt and cable anchor together with the hole plugging device into the hole. During the grouting process, the expansion pipe realizes self-expansion hole plugging, with simple and convenient operation, realizes the integration of bolt and grouting, achieves the effect of high-pressure hole plugging, and is more convenient. Compared with the traditional process, this system uses an integrated bolt-grouting hole plugging device and a self-designed intelligent grouting system for grouting. The currently commonly used grouting construction is cumbersome and inefficient, and there is no hole plugging device that can realize the integration of bolt and cable anchor during grouting. This hole plugging device improves the integration of bolt and grouting through technology, achieves the effect of high-pressure hole plugging, is small in size and convenient for construction. At the same time, unlike the traditional mine grouting machine that requires visual observation to determine whether the grouting is completed and manually turn off the grouting pump, the intelligent grouting system used in this method can achieve quantitative grouting control of the anchoring material, achieving the effect of automatic control, and the strength of the anchoring material is higher. Description of the Drawings

[0013] Figure 1 This is a schematic diagram of the system connection structure of the present utility model.

[0014] Figure 2 This is a schematic diagram of the structure of the grouting hole plugging device of the present utility model.

[0015] Figure 3 This is a schematic diagram of the structure of the grouting hole plugging device of the present utility model after removing the outer pipe.

[0016] The labels in the figure are: 1 is the outer expansion pipe, 2 is the slurry discharging device, 3 is the grouting pipe, 4 is the inner expansion pipe, 5 is the locking buckle, 6 is the limit support device, 7 is the solenoid valve, 8 is the flow sensor, 9 is the grouting pump, 10 is the raw material barrel, and 11 is the quantitative controller. Detailed Embodiment

[0017] The present utility model will be further described below with reference to the accompanying drawings.

[0018] As Figures 1 to 3As shown in the figure, the mine grouting hole-sealing device of the present utility model includes a grouting pipe 3, an outer expansion pipe 1, an inner expansion pipe 4, and a limit support device 6. The outer expansion pipe 1 is sleeved outside the inner expansion pipe 4. The limit support devices 6 are arranged at intervals. Both ends of the outer expansion pipe 1 are hermetically connected to the limit support devices 6 respectively. Both ends of the inner expansion pipe 4 are penetrated through the limit support devices 6. The grouting pipe 3 is penetrated through the limit support devices 6 along the gap between the outer expansion pipe 1 and the inner expansion pipe 4. And the penetrated section of the grouting pipe 3 is provided with grouting holes, and the penetrated end is provided with a slurry discharging device 2. Those skilled in the art can understand that the specific structure of the preferred grouting hole-sealing device of this system includes a grouting pipe 3, an expansion pipe, and a limit support device 6. The limit support devices 6 are arranged at intervals at both ends of the expansion pipe and are hermetically connected to both ends of the expansion pipe. The outer expansion pipe 1 is sleeved outside the inner expansion pipe 4 to form a double-layer pipe structure. The slurry discharging device 2 is a prior art and is actually connected to the grouting pipe 3 by threads. An aluminum sheet cutting structure is designed inside the device. This structure stacks O-ring seals and aluminum sheets in the direction from the grouting port to the slurry discharging. During grouting, as the pressure continuously increases, when the internal pressure of the entire hole-sealing device reaches a certain value, at this time the expansion pipe has completed self-expansion, the aluminum sheet is cut, and the slurry discharging device is opened, and the slurry then enters the drilling hole after the inner and outer expansion pipes complete self-expansion hole sealing, and the bolt and cable drilling holes can be smoothly grouted. A certain pressure is required for actual work to open, so when starting grouting, the slurry will flow into the gap between the outer expansion pipe 1 and the inner expansion pipe 4 from the grouting holes in the penetrated section of the grouting pipe 3. Preferably, the aperture of the grouting holes is about 3 to 4 mm, which is used to make the grouting liquid flow into the space between the outer expansion pipe 1 and the inner expansion pipe 4 outside the cable. Actually, preferably, the inner expansion pipe 4 and the limit support device 6 are sealed by an O-ring to block the slurry to form a sealed space. At this time, the self-expansion of the expansion pipe can be realized by the self-pressure of the slurry. The self-expansion of the outer expansion pipe 1 is used to seal the cable drilling hole, and the O-ring is used to prevent the slurry from flowing out along the bolt and cable. So that the outer expansion pipe 1 expands during grouting to realize self-expansion hole sealing. Preferably, the grouting pipe 3 is made of steel pipe material. The expansion pipe is divided into an inner part and an outer part, and both are made of materials with good expansion coefficients, such as rubber material. And the inner expansion pipe 4 is used to penetrate the cable. The grouting pipe 3 and the inner expansion pipe 4 are combined into a whole through the limit support device 6, and the outer expansion pipe 1 serves as the outer wall and wraps outside this whole to form a double-layer structure. The slurry discharging device 2 is connected to the tail of the grouting pipe 3.

[0019] Preferably, in the above structure, both ends of the outer expansion pipe 1 are sleeved on the limit support devices 6 arranged at intervals. Those skilled in the art can understand that in this system, the outer expansion pipe 1 is preferably sleeved on the two limit support devices 6 to reduce the manufacturing cost, and bonding or clamping and other sealing methods can be used for connection.

[0020] Preferably, the above structure further includes a locking buckle 5, which is sleeved on the end of the outer expansion tube 1, so that the outer expansion tube 1 is hermetically connected to the limit support device 6. Those skilled in the art can understand that, in order to facilitate the hermetic connection between the outer expansion tube 1 and the limit support device 6, in this system, the locking buckle 5 is actually sleeved on the end of the outer expansion tube 1, and the locking buckle 5 can be screwed to achieve the connection.

[0021] Preferably, the outer expansion tube 1 in the above structure is made of rubber material. Those skilled in the art can understand that, in order to facilitate the deformation and plugging of the expansion tube, it is preferred that the outer expansion tube 1 in this structure is made of rubber material.

[0022] Preferably, the inner expansion tube 4 in the above structure is made of rubber material. Those skilled in the art can understand that, in order to facilitate the deformation and plugging of the expansion tube, it is further preferred that the inner expansion tube 4 in this structure is made of rubber material.

[0023] The integrated bolt-grouting intelligent grouting system includes a raw material barrel 10, a grouting pump 9, a flow sensor 8, a quantitative controller 11, a solenoid valve 7 and any mine grouting hole plugging device. The raw material barrel 10, the grouting pump 9, the flow sensor 8 and the solenoid valve 7 are connected in sequence, and the grouting pump 9, the flow sensor 8 and the solenoid valve 7 are respectively electrically connected to the quantitative controller 11. The other end of the solenoid valve 7 is connected to the grouting pipe 3 of the mine grouting hole plugging device. Those skilled in the art can understand that the quantitative controller 11 is connected to a contactor to indirectly control the grouting pump 9. A contactor is a switch that controls high voltage with low voltage. The quantitative controller 11 and the contactor are connected by two wires, which are used for the quantitative controller 11 to supply power to the contactor to control the closing and opening of the contactor. One end of the contactor is connected to the grouting pump 9 by three wires, and the other end of the contactor is connected to an external power supply, and the external AC power supply supplies power to the grouting pump 9. When the slurry flows through the flow sensor 8, the flow sensor 8 continuously feeds back flow pulse signals to the quantitative controller 11. When the flow pulse signal transmitted back by the flow sensor 8 matches the required slurry volume obtained by the quantitative controller 11, the quantitative controller 11 will immediately stop the operation of the grouting pump 9 by controlling power-off and close the solenoid valve 7 to prevent the slurry from passing through the valve. The raw material barrel 10 is used to store the slurry and is connected to the inlet of the grouting pump 9. Usage process: 1. Drill holes on the rock wall; 2. Pass the bolt or cable through the inner expansion tube of the hole plugging device and place them together into the drilled holes; 3. Connect the grouting pipe 3 to the intelligent grouting system; 4. Press the keys on the quantitative controller 11 to input the slurry volume, press the placement and start button, and start automatic grouting. When the slurry reaches the input value, the grouting will automatically stop. During the grouting process, the expansion tube realizes self-expanding hole plugging.

[0024] Preferably, a one-way valve is provided at the feed end of the grouting pipe 3 in the above system. Those skilled in the art can understand that the front end part of the orifice of the grouting pipe 3 is used to connect the grouting machine, and a one-way valve is provided at the connection to prevent the slurry from flowing back after the grouting is completed.

[0025] Example

[0026] The experimental data of the anchoring material strength are shown in Table 1.

[0027] Table 1 Calculation results of compressive strength

[0028] Category 1 day / MPa 3 days / MPa 5 days / MPa 7 days / MPa 28 days / MPa a 22.4 46.64 48.21 54.17 58.03 b 31.48 52.15 57.46 56.36 67.33 c 36.14 45.33 56.25 60.40 73.23

[0029] The grouting material uses ordinary Portland cement, sulfoaluminate cement and slag, and 60% ordinary Portland cement, 30% sulfoaluminate cement and 10% mineral powder are used for grouting. The highest strength can reach 36.14 Mpa at 24 h in the early stage.

[0030] The experimental results of the intelligent grouting system are shown in Table 2.

[0031] Table 2 Grouting experimental data

[0032]

[0033]

[0034] The experimental results show that the intelligent grouting system basically achieves the purpose of controlling variables, and in multiple grouting experiments, the error always remains at about 2%.

Claims

1. Anchor-injection integrated intelligent grouting system, characterized by: The invention comprises a raw material barrel (10), a grouting pump (9), a flow sensor (8), a quantitative control instrument (11), a solenoid valve (7) and a grouting hole sealer for mining. The raw material barrel (10), the grouting pump (9), the flow sensor (8) and the solenoid valve (7) are connected in sequence, and the grouting pump (9), the flow sensor (8) and the solenoid valve (7) are respectively electrically connected to the quantitative control instrument (11). The grouting hole sealer for mining comprises a grouting pipe (3), an outer expansion pipe (1), an inner expansion pipe (4) and a position limiting support device (6). The outer expansion pipe (1) is sleeved outside the inner expansion pipe (4), the position limiting support device (6) is arranged at intervals, and both ends of the outer expansion pipe (1) are respectively connected to the position limiting support device. The inner expansion tube (4) and the outer expansion tube (1) are sealed and connected with each other by a positioning support device (6), the two ends of the inner expansion tube (4) are passed through the positioning support device (6), the grouting tube (3) is passed through the positioning support device (6) along the gap between the outer expansion tube (1) and the inner expansion tube (4), and the passing section of the grouting tube (3) is provided with a grouting hole, and the passing end is provided with a grouting device (2); the two ends of the outer expansion tube (1) are sleeved on the positioning support devices (6) arranged at intervals; the outer expansion tube (1) also includes a locking buckle (5), the locking buckle (5) is sleeved on the end of the outer expansion tube (1), and the outer expansion tube (1) is sealed and connected with the positioning support device (6); the outer expansion tube (1) is made of rubber material; the inner expansion tube (4) is made of rubber material; The other end of the electromagnetic valve (7) is connected to the grouting pipe (3) of the mining grouting hole sealer; the feed end of the grouting pipe (3) is provided with a one-way valve.

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