A grouting backflow flushing control system of a drilling, anchoring and grouting integrated machine

Abstract

This utility model discloses a grouting return flushing control system for an integrated drilling and anchoring machine, including a supporting steel plate, a four-way valve, and a switching component. The four-way valve and the switching component are respectively installed on both sides of the supporting steel plate. Two opposite ports of the four-way valve are connected to the grouting pipe and the flushing pressure water pipe, respectively, while the other two ports are arbitrarily connected to the grouting pipe and the return grout pipe. The valve core inside the four-way valve has two channels, and the two channels are respectively connected to two sets of adjacent ports. A base is provided on the four-way valve, and a ring of mounting holes is provided on the base. The valve stem passes through the supporting steel plate and is connected to the switching component. The switching component includes a rotating connecting rod and a pushing mechanism. One end of the rotating connecting rod is fixedly connected to the valve stem, and the other end is hinged to the extended end of the pushing mechanism, with the extended end of the pushing mechanism freely suspended. The other end of the pushing mechanism is hinged to the supporting steel plate, which can promptly flush the grouting pipe and prevent condensation and blockage during the waiting process of anchor transfer.

Description

Technical Field

[0001] This utility model relates to the field of grouting technology, specifically to a grouting backflow flushing control system for an integrated drilling, anchoring, and grouting machine. Background Technology

[0002] During drilling, anchoring, and grouting operations, it's inevitable to encounter situations like drill rod jamming and borehole collapse. Dealing with jammed drill rods and removing the drill bit can be time-consuming, ranging from a few minutes to tens of minutes or even half an hour. Borehole collapse, preventing the anchor rod from being inserted, also causes significant delays. During this time, the prepared, thick cement slurry is prone to initial setting and blockage, preventing grouting. The third step in the drilling, anchoring, and grouting integrated machine's operation is grouting. With current equipment configurations, drilling is generally smooth when the cofferdam at the tunnel face is good, and the anchor rod can be pushed and locked into the rock borehole quickly before grouting can proceed normally. However, because the surrounding rock of tunnels requiring drilling, anchoring, and grouting operations is often poor, with fractured rock prone to borehole collapse and drill rod jamming, sometimes the anchor rod cannot be pushed into the borehole smoothly. This prolongs the process, and the thick slurry remaining in the grouting pipe easily solidifies, causing blockage and severely impacting the operation's duration. Utility Model Content

[0003] This utility model aims to solve the technical problems existing in the prior art. In particular, it innovatively proposes a grouting backflow flushing control system for an integrated drilling and anchoring machine, which can flush the grouting pipe in a timely manner to prevent solidification and blockage during the waiting process of anchor transfer.

[0004] To achieve the above objectives, this utility model provides a grouting backflow flushing control system for an integrated drilling, anchoring, and grouting machine, including a supporting steel plate, a four-way valve connecting to the grouting pipeline, and a switching component for switching the connecting pipeline of the four-way valve. The four-way valve and the switching component are respectively installed on both sides of the supporting steel plate.

[0005] The four-way valve has two opposite ports that are connected to the grouting pipe and the flushing pressure water pipe, respectively, and the other two ports can be connected to the grouting pipe and the return grout pipe arbitrarily. The valve core inside the four-way valve has two channels, and the two channels are connected to two adjacent ports respectively. The four-way valve is provided with a base for fixing to the support steel plate. The base is provided with a ring of mounting holes. The center of the base is provided with a clearance hole for the valve stem of the valve core to pass through. The valve stem passes through the support steel plate and connects to the switching component.

[0006] The switching assembly includes a rotating link and a pushing mechanism; one end of the rotating link is fixedly connected to the valve stem, and the other end is hinged to the extended end of the pushing mechanism, with the extended end of the pushing mechanism freely suspended in the air, and the other end of the pushing mechanism is hinged to the support steel plate.

[0007] In the above scheme: the rotating connecting rod is detachably connected to the valve stem, which facilitates assembly or replacement.

[0008] In the above scheme: at least one side of the valve stem is provided with a connecting plane, and one end of the rotating connecting rod is provided with a mounting hole for fitting onto the valve stem.

[0009] In the above scheme: the end of the valve stem is also provided with an anti-detachment structure to prevent the rotating connecting rod from detaching, so as to ensure the stable connection between the rotating connecting rod and the valve stem.

[0010] In the above scheme: the anti-loosening structure is an anti-loosening nut, and the valve stem body is provided with threads for installing the anti-loosening nut. The structure is simple and easy to install.

[0011] In the above scheme: the pushing mechanism is a hydraulic cylinder, and the hydraulic cylinder is connected to a hydraulic oil pipe.

[0012] In the above scheme, the supporting steel plate is set vertically to save space.

[0013] In summary, the beneficial effects of this utility model are as follows: The original grouting pipeline with only one grouting pipe is divided into an injection pipe and a pressure grouting pipe. The four-way valve also connects to a flushing pressure water pipe and a return grouting pipe. This allows for flushing of the pressure grouting pipe via the flushing pressure water pipe, and connects the injection pipe to the return grouting pipe, ensuring that the grout in the injection pipe remains in a circulating state, preventing coagulation. Furthermore, the change in the consistency of the returned grout can be observed, allowing for timely adjustment of the grout consistency, thus ensuring both full grouting and unobstructed pipeline flow. The addition of a pushing mechanism and a rotating linkage enables electric drive of the four-way valve, improving efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the connection between the four-way valve and the grouting pipeline of this utility model.

[0015] Figure 2 This is a cross-sectional view of a four-way valve.

[0016] Figure 3 This is a schematic diagram showing the connection between the four-way valve and the supporting steel plate.

[0017] Figure 4 This is a schematic diagram of the installation of the driving mechanism and the supporting steel plate. Detailed Implementation

[0018] The present invention will be further described below with reference to embodiments and accompanying drawings:

[0019] like Figures 1-4As shown, a grouting return flushing control system for an integrated drilling and anchoring machine includes a four-way valve 1. Two opposite ports of the four-way valve 1 are connected to a grouting pipe 5 and a flushing pressure water pipe 7, respectively. The remaining two ports are arbitrarily connected to a grouting pressure pipe 8 and a return grout pipe 6. The other end of both the grouting pipe 5 and the return grout pipe 6 are connected to a grouting tank. A screw grouting pump is installed on the grouting pressure pipe 8 for grouting into the anchor hole. A flushing solenoid valve can be installed on the flushing pressure water pipe 7, and the beginning of the flushing pressure water pipe 7 is connected to a flushing water tank. This is existing technology and not the main innovative feature of this technical solution, so it will not be elaborated here.

[0020] To improve connection stability, the grouting pipe 5, flushing pressure water pipe 7, grouting pipe 8, and return grout pipe 6 are all fixed with clamps 4. The valve core 2 inside the four-way valve 1 has two channels, and the two channels are connected to two adjacent interfaces respectively, so that the grouting pipe 5 and the flushing pressure water pipe 7 can never be connected.

[0021] It also includes a support steel plate 10, which is vertically arranged to save space. The four-way valve 1 is provided with a base 11 for fixing to the support steel plate 10, and the base 11 has a ring of mounting holes. The center of the base 11 has a clearance hole for the valve stem 12 of the valve core 2 to pass through. The valve stem 12 passes through the support steel plate 10 and is provided with a rotating connecting rod 13. The other end of the rotating connecting rod 13 is hinged to the extended end of the pushing mechanism 14, which is freely suspended in the air. The other end of the pushing mechanism 14 is hinged to the support steel plate 10. In this embodiment, the pushing mechanism 14 is a hydraulic cylinder, which is connected to a hydraulic oil pipe and equipped with a hydraulic control panel for driving the hydraulic cylinder to extend or retract. The rotating connecting rod 13 is detachably connected to the valve stem 12. Connecting planes 16 are provided on all four sides of the valve stem 12, and one end of the rotating connecting rod 13 has a mounting hole for fitting onto the valve stem 12. The end of the valve stem 12 is provided with an anti-disengagement structure to prevent the rotating connecting rod 13 from disengaging. In this embodiment, the anti-disengagement structure is an anti-disengagement nut, and the valve stem 12 is provided with threads for installing the anti-disengagement nut.

[0022] In use, the grouting pipe 5 is connected to the upper interface of the four-way valve 1, and the pushing mechanism 14 is in the retracted state. The grouting pipe 5 is connected to the return grouting pipe 6, and the grout circulates between the four-way valve 1 and the grouting tank. The change in the consistency of the return grout can be observed, and the consistency of the grout can be adjusted in time to ensure full grouting and unobstructed pipeline. When the anchor bolt is anchored, the hydraulic control panel is operated to push the pushing mechanism 14 installed on the four-way valve 1 out, and the four-way valve 1 is switched to connect the grouting pipe 5 and the pressure grouting pipe 8. The grout is injected into the anchor bolt through the pressure grouting pipe 8. When cement grout is squeezed out of the anchor bolt hole, the grouting is completed. The pushing mechanism 14 is then operated to retract, and the grouting pipe 5 is connected to the return grouting pipe 6, and the flushing pressure water pipe 7 is connected to the pressure grouting pipe 8. The cement grout circulates back to the grouting tank, and at the same time, the grouting rod is pulled out to separate the anchor bolt. Operate the flushing solenoid valve to flush the cement slurry in the grouting pipe 8 with pressurized water. When clean water flows out, close the flushing solenoid valve, and the pull rod feeder retracts to begin drilling and anchoring the next hole.

Claims

1. A grouting backflow flushing control system for an integrated drilling, anchoring, and injection machine, characterized in that: It includes a supporting steel plate (10), a four-way valve (1) connecting to the grouting pipeline, and a switching assembly for switching the pipeline connecting the four-way valve (1), wherein the four-way valve (1) and the switching assembly are respectively installed on both sides of the supporting steel plate (10); The two opposite ports of the four-way valve (1) are respectively connected to the grouting pipe (5) and the flushing pressure water pipe (7), and the other two ports are arbitrarily connected to the grouting pipe (8) and the return grout pipe (6); the valve core (2) inside the four-way valve (1) is provided with two channels, and the two channels are respectively connected to two sets of adjacent ports. The four-way valve (1) is provided with a base (11) for fixing on the support steel plate (10). The base (11) is provided with a ring of mounting holes. The middle part of the base (11) is provided with a clearance hole for the valve stem (12) of the valve core (2) to pass through. The valve stem (12) passes through the support steel plate (10) and connects to the switching component. The switching assembly includes a rotating link (13) and a pushing mechanism (14); one end of the rotating link (13) is fixedly connected to the valve stem (12), and the other end is hinged to the extended end of the pushing mechanism (14), and the extended end of the pushing mechanism (14) is freely suspended in the air, and the other end of the pushing mechanism (14) is hinged to the supporting steel plate (10).

2. The grouting backflow flushing control system for an integrated drilling, anchoring, and grouting machine according to claim 1, characterized in that: The rotating connecting rod (13) is detachably connected to the valve stem (12).

3. The grouting return flushing control system for an integrated drilling and anchoring machine according to claim 2, characterized in that: The valve stem (12) has a connecting plane (16) on at least one side, and the rotating connecting rod (13) has a mounting hole at one end for fitting onto the valve stem (12).

4. The grouting return flushing control system for an integrated drilling and anchoring machine according to claim 3, characterized in that: The end of the valve stem (12) is also provided with an anti-detachment structure to prevent the rotating connecting rod (13) from detaching.

5. The grouting backflow flushing control system for an integrated drilling and anchoring machine according to claim 4, characterized in that: The anti-loosening structure is an anti-loosening nut, and the valve stem (12) is provided with threads for installing the anti-loosening nut.

6. The grouting return flushing control system for an integrated drilling, anchoring, and grouting machine according to claim 1, characterized in that: The pushing mechanism (14) is a hydraulic cylinder, and the hydraulic cylinder is connected to a hydraulic oil pipe.

7. The grouting return flushing control system for an integrated drilling, anchoring, and grouting machine according to claim 1, characterized in that: The supporting steel plate (10) is set vertically.

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