Delivery system and delivery method for underground drilling grouting

Abstract

The invention relates to the technical field of mine water disaster prevention and control, and provides a delivery system and a delivery method for underground drilling grouting. The delivery pipe body is suitable for being connected to a pouring opening, one end of the first pouring pipeline is connected with the delivery pipe body, and the other end of the first pouring pipeline is suitable for being connected with a grouting device; and a first control valve is arranged on the first filling pipeline. One end of the second filling pipeline is connected with the delivery pipe body, and the other end of the second filling pipeline is suitable for being connected with an aggregate feeding device; and a second control valve is arranged on the second filling pipeline. One end of the third filling pipeline is connected to the position, close to the grouting device, of the first filling pipeline, and the other end of the third filling pipeline is connected to the position, close to the aggregate feeding device, of the second filling pipeline; and a third control valve is arranged on the third filling pipeline. The device can replace manual aggregate filling, aggregate can be continuously filled in batches according to specific engineering requirements, and the efficiency and the construction speed of grouting engineering can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of mine water hazard prevention and control, and in particular to a delivery system and a delivery method for underground drilling grouting. Background Art

[0002] Traditional grouting technology usually uses slurries of different media to seal underground cracks and holes. The sealing effect is limited by the viscosity and density of the slurry itself. Sometimes a single slurry cannot meet good sealing requirements.

[0003] In the related art, in order to improve the plugging effect of cracks and holes, aggregates are introduced into the slurry to increase the plugging capacity of the slurry. Since aggregates can fill larger gaps and cracks, the plugging effect of cracks and holes and the stability of underground engineering can be improved. However, when adding aggregates, it is usually dependent on manual or simple filling devices, which makes it difficult to achieve large-scale or continuous filling of aggregates, resulting in low grouting efficiency in large projects. Summary of the invention

[0004] The first aspect of the present invention provides a delivery system for underground drilling grouting to solve the above-mentioned technical defects in the prior art. It can replace manual aggregate filling and can add aggregates in batches and continuously according to specific engineering requirements, thereby improving the efficiency and construction speed of grouting projects.

[0005] A second aspect of the present invention provides a delivery method of a delivery system for downhole drilling grouting.

[0006] A first aspect of the present invention provides a delivery system for downhole drilling grouting, comprising a delivery pipe body, a first grouting pipeline, a second grouting pipeline and a third grouting pipeline.

[0007] The delivery tube is adapted to be connected to the injection port.

[0008] One end of the first injection pipeline is connected to the delivery pipe body, and the other end of the first injection pipeline is suitable for connecting to a grouting device; a first control valve is provided on the first injection pipeline.

[0009] One end of the second pouring pipeline is connected to the delivery pipe body, and the other end of the second pouring pipeline is suitable for connecting to an aggregate feeding device; a second control valve is arranged on the second pouring pipeline.

[0010] One end of the third pouring pipeline is connected to a position of the first pouring pipeline close to the grouting device, and the other end of the third pouring pipeline is connected to a position of the second pouring pipeline close to the aggregate feeding device; a third control valve is provided on the third pouring pipeline.

[0011] The delivery system for downhole drilling grouting provided by the present invention also includes a bypass grouting pipeline, one end of which is connected to the third grouting pipeline, and the other end of which is connected to an end of the second grouting pipeline away from the aggregate feeding device.

[0012] According to the delivery system for downhole drilling grouting provided by the present invention, a fourth control valve is provided on the bypass injection pipeline, and the fourth control valve is used to control the on-off of the bypass injection pipeline.

[0013] According to the delivery system for downhole drilling grouting provided by the present invention, the first grouting pipeline includes a grouting pipe, a pipeline connector and a three-way joint A, one end of the grouting pipe is connected to the delivery pipe body, the other end of the grouting pipe is connected to the pipeline connector, the three-way joint A is arranged on the grouting pipe, and the third grouting pipeline is connected to the three-way joint A.

[0014] According to the delivery system for downhole drilling grouting provided by the present invention, the first grouting pipeline also includes a two-way joint, which is located between the grouting pipe and the delivery pipe body and is connected to the grouting pipe and the delivery pipe body respectively.

[0015] According to the delivery system for downhole drilling grouting provided by the present invention, the second pouring pipeline includes an aggregate silo and a mixing material pipe, one end of the aggregate silo is provided with a connecting flange, the other end of the aggregate silo is connected to the mixing material pipe, and the end of the mixing material pipe facing away from the aggregate silo is connected to the delivery pipe body; the second control valve is arranged on the mixing material pipe.

[0016] According to the delivery system for underground drilling grouting provided by the present invention, a pressure relief valve is provided on the aggregate silo, and the pressure relief valve is arranged near the connection flange.

[0017] According to the delivery system for downhole drilling grouting provided by the present invention, the third injection pipeline includes a material pipe and a three-way joint B, and the material pipe is connected to the second injection pipeline through the three-way joint B; the third control valve is arranged at a position of the material pipe close to the first injection pipeline.

[0018] The delivery system for underground drilling grouting provided by the present invention includes a delivery pipe body, a first perfusion pipeline, a second perfusion pipeline and a third perfusion pipeline, the delivery pipe body is connected to the perfusion port, the first perfusion pipeline and the second perfusion pipeline are both connected to the delivery pipe body, and the third perfusion pipeline is respectively connected to the first perfusion pipeline and the second perfusion pipeline, and corresponding control valves are arranged on the first perfusion pipeline, the second perfusion pipeline and the third perfusion pipeline. The opening or closing of different control valves can be controlled according to the perfusion needs, so that the delivery system can be flexibly applied to different types of slurry delivery such as monomer slurry delivery, low-concentration small-particle aggregate slurry and high-concentration large-particle aggregate slurry, so as to fill or repair underground cracks and pores, and achieve the purpose of grouting and water blocking, and has strong adaptability.

[0019] In addition, the delivery system can replace manual aggregate injection, and can add aggregate in batches and continuously according to specific project requirements, which can improve the efficiency and construction speed of grouting projects. The effect is more prominent especially when dealing with complex crack structures or sealing large areas.

[0020] The present invention also provides a delivery method for a delivery system for underground drilling grouting, comprising the following steps: When it is determined that the delivery system needs to deliver monomer slurry, the second control valve and the third control valve are controlled to be closed, and the first control valve is controlled to be opened, so that the first perfusion pipeline is conducted; When it is determined that the delivery system needs to deliver mixed slurry, the second control valve and the third control valve are controlled to be closed, and the first control valve is controlled to be opened; aggregate is delivered to the second pouring pipeline through the aggregate feeding device; when it is determined that the aggregate delivery is completed, the second control valve and the third control valve are controlled to be opened, and the first control valve is controlled to be closed, so that the monomer slurry delivered by the grouting device drives the aggregate to be delivered; when it is determined that the aggregate delivery is completed, the first control valve is controlled to be opened, the second control valve and the third control valve are controlled to be closed, and the second pouring pipeline is controlled to release pressure.

[0021] According to the delivery method of the delivery system for downhole drilling grouting provided by the present invention, the second control valve and the third control valve are controlled to be opened, and the first control valve is controlled to be closed, so that the monomer slurry delivered by the grouting device drives the aggregate to be delivered, and further includes: When it is determined that the flow rate of the mixed material in the second perfusion pipeline is less than the preset flow rate, the fourth control valve is controlled to open to connect the bypass perfusion pipeline, thereby accelerating the flow of the mixed material in the second perfusion pipeline near the discharge port.

[0022] The delivery method of the delivery system for downhole drilling grouting provided by the present invention can control the opening or closing of different control valves according to the grouting needs, so that the delivery system can be flexibly applied to different types of slurry delivery such as monomer slurry delivery, low-concentration small-particle aggregate slurry and high-concentration large-particle aggregate slurry, so as to fill or repair underground cracks and pores and achieve the purpose of grouting and water blocking, and has strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a structural schematic diagram of a delivery system for underground drilling grouting provided by one embodiment of the present invention.

[0025] Figure 2 It is a structural schematic diagram of a delivery system for underground drilling grouting provided by another embodiment of the present invention.

[0026] Figure 3 This is one of the schematic diagrams of the use status of the delivery system for underground drilling grouting provided by the embodiment of the present invention.

[0027] Figure 4 This is the second schematic diagram of the use status of the delivery system for downhole drilling grouting provided by an embodiment of the present invention.

[0028] Figure 5 This is the third schematic diagram of the use status of the delivery system for downhole drilling grouting provided by an embodiment of the present invention.

[0029] Reference numerals: 10. Delivery pipe body; 20. First grouting pipeline; 21. First control valve; 22. Grouting pipe; 23. Pipeline connector; 24. Two-way connector; 30. Second injection pipeline; 31. Second control valve; 32. Aggregate silo; 33. Mixing material pipe; 34. Pressure relief valve; 40. The third filling pipeline; 41. The third control valve; 42. The material pipe; 50. Bypass injection pipeline; 51. Fourth control valve. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0031] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0032] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0034] Figure 1 It is a structural schematic diagram of a delivery system for underground drilling grouting provided by one embodiment of the present invention.

[0035] See also Figure 1An embodiment of the present invention provides a delivery system for downhole drilling grouting, which is used to replace manual delivery of slurry and aggregate. The delivery system for downhole drilling grouting includes a delivery pipe body 10, a first perfusion pipeline 20, a second perfusion pipeline 30 and a third perfusion pipeline 40.

[0036] Among them, the delivery pipe body 10 can be a part of the first perfusion pipeline 20 or the second perfusion pipeline 30. For example, when the delivery pipe body 10 is a part of the first perfusion pipeline 20, it is equivalent to the delivery pipe body 10 of the second perfusion pipeline 30 and the first perfusion pipeline 20 being connected; when the delivery pipe body 10 is a part of the second perfusion pipeline 30, it is equivalent to the delivery pipe body 10 of the first perfusion pipeline 20 and the second perfusion pipeline 30 being connected. In order to facilitate the description of the delivery system in the embodiment of the present invention, the delivery pipe body 10 is described separately as an independent structure. A connecting flange C connected to the perfusion port (such as the orifice of the borehole) is provided on the delivery pipe body 10, and is connected to the pipeline in the borehole or gap through the connecting flange C.

[0037] One end of the first perfusion pipeline 20 is connected to the delivery pipe body 10, and the other end of the first perfusion pipeline 20 is suitable for connecting to a grouting device; a first control valve 21 is provided on the first perfusion pipeline 20, and the first control valve 21 is used to control the first perfusion pipeline 20 to be turned on or off.

[0038] One end of the second perfusion pipeline 30 is connected to the delivery pipe body 10, and the other end of the second perfusion pipeline 30 is suitable for connecting to the aggregate feeding device; a second control valve 31 is provided on the second perfusion pipeline 30, and the second control valve 31 is used to control the second perfusion pipeline 30 to be turned on or off.

[0039] One end of the third perfusion pipeline 40 is connected to a position of the first perfusion pipeline 20 close to the grouting device, and the other end of the third perfusion pipeline 40 is connected to a position of the second perfusion pipeline 30 close to the aggregate feeding device; a third control valve 41 is provided on the third perfusion pipeline 40, and the third control valve 41 is used to control the conduction or disconnection of the third perfusion pipeline 40.

[0040] When the delivery system needs to deliver monomer slurry, the second control valve 31 and the third control valve 41 are controlled to be closed, and the first control valve 21 is controlled to be opened to conduct the first injection pipeline 20. At this time, the grouting device delivers the monomer slurry from the first injection pipeline 20 to the delivery pipe body 10, and delivers it into the borehole or gap through the delivery pipe body 10 for filling.

[0041] When the delivery system needs to deliver mixed slurry, the second control valve 31 and the third control valve 41 are controlled to be closed, and the first control valve 21 is controlled to be opened; aggregate is delivered to the second injection pipeline 30 through the aggregate delivery device. When the aggregate is delivered, the second control valve 31 and the third control valve 41 are controlled to be opened, and the first control valve 21 is controlled to be closed, so that the monomer slurry delivered by the grouting device drives the aggregate to be delivered. When the aggregate delivery is completed, the first control valve 21 is controlled to be opened, the second control valve 31 and the third control valve 41 are controlled to be closed, and the second injection pipeline 30 is controlled to release pressure.

[0042] It should be noted that the first control valve 21 and the third control valve 41 can be ball valves. The ball valves are used as opening and closing parts. The ball of the ball valve is driven by the valve stem and rotates around the axis of the ball valve. It can be used for fluid regulation and control. The ball valve can not only flexibly control the confluence, diversion, and flow direction switching of the medium on the perfusion pipeline, but also close any perfusion pipeline to connect other perfusion pipelines. The ball valve can be a manual ball valve, a pneumatic ball valve, and an electric ball valve. When the ball valve is a pneumatic ball valve and an electric ball valve, an automatic control system can be introduced into the delivery system. The second control valve 31 can be a straight-through valve such as a plug valve that can be quickly opened and closed. The plug valve can cut off and connect the flow of the medium in the second perfusion pipeline 30.

[0043] It can be understood that the delivery system for downhole drilling grouting provided by the embodiment of the present invention includes a delivery pipe body 10, a first perfusion pipeline 20, a second perfusion pipeline 30 and a third perfusion pipeline 40, the delivery pipe body 10 is connected to the perfusion port, the first perfusion pipeline 20 and the second perfusion pipeline 30 are both connected to the delivery pipe body 10, and the third perfusion pipeline 40 is respectively connected to the first perfusion pipeline 20 and the second perfusion pipeline 30, and corresponding control valves are provided on the first perfusion pipeline 20, the second perfusion pipeline 30 and the third perfusion pipeline 40. The opening or closing of different control valves can be controlled according to the perfusion needs, so that the delivery system can be flexibly applied to different types of slurry delivery such as monomer slurry delivery, low-concentration small-size aggregate slurry and high-concentration large-size aggregate slurry, so as to fill or repair underground cracks and pores and achieve the purpose of grouting and water blocking, and has strong adaptability.

[0044] In addition, the delivery system can replace manual aggregate injection, and can add aggregate in batches and continuously according to specific project requirements, which can improve the efficiency and construction speed of grouting projects. The effect is more prominent especially when dealing with complex crack structures or sealing large areas.

[0045] Figure 2 It is a structural schematic diagram of a delivery system for underground drilling grouting provided by another embodiment of the present invention.

[0046] See also Figure 2On the basis of the above embodiment, different from the above embodiment, the delivery system for downhole drilling grouting also includes a bypass perfusion pipeline 50, one end of the bypass perfusion pipeline 50 is connected to the third perfusion pipeline 40, and the other end of the bypass perfusion pipeline 50 is connected to an end of the second perfusion pipeline 30 away from the aggregate feeding device.

[0047] In other words, there are two connection positions between the third perfusion pipeline 40 and the second perfusion pipeline 30. One is that the third perfusion pipeline 40 is directly connected to the feeding end of the second perfusion pipeline 30, that is, the position where the second perfusion pipeline 30 is close to the aggregate feeding device. The other is that the third perfusion pipeline 40 is connected to the discharge end of the second perfusion pipeline 30 through the bypass perfusion pipeline 50, that is, the position where the second perfusion pipeline 30 is far away from the aggregate feeding device.

[0048] In other words, the third perfusion pipeline 40 is divided into two paths connected to the second perfusion pipeline 30. One path is that the third perfusion pipeline 40 is directly connected to the second perfusion pipeline 30, and the other path is that a bypass perfusion pipeline 50 is extended on the third perfusion pipeline 40 and connected to the second perfusion pipeline 30 through the bypass perfusion pipeline 50.

[0049] When the mixed material in the second perfusion pipeline 30 is blocked, that is, the conveying speed of the mixed material is slowed down, at this time, the monomer slurry in the bypass perfusion pipeline 50 can be used to accelerate the flow of the mixed material near the discharge end of the second perfusion pipeline 30, thereby alleviating the blockage of the mixed material in the second perfusion pipeline 30.

[0050] The bypass injection pipeline 50 may be a metal pipe, such as an iron pipe, or a high-pressure hose, which can withstand a certain pressure and ensure a certain sealing performance.

[0051] Continue reading Figure 2 In some embodiments of the present invention, a fourth control valve 51 is provided on the bypass perfusion pipeline 50, and the fourth control valve 51 is used to control the on-off of the bypass perfusion pipeline 50. The fourth control valve 51 can also be a ball valve, which is mainly used to conduct the medium in the bypass perfusion pipeline 50 or cut off the medium in the bypass perfusion pipeline 50.

[0052] For example, when the mixed material in the second perfusion pipeline 30 is blocked, the fourth control valve 51 is opened to make the bypass perfusion pipeline 50 conductive, and the monomer slurry in the bypass perfusion pipeline 50 accelerates the flow of the mixed material near the discharge end of the second perfusion pipeline 30, thereby alleviating the blockage of the mixed material in the second perfusion pipeline 30. In general, the fourth control valve 51 can be closed to make the bypass perfusion pipeline 50 non-conductive.

[0053] In addition, when the fourth control valve 51 is not provided, it can be understood that the third perfusion pipeline 40 is always divided into two paths to communicate with the second perfusion pipeline 30 for simultaneously supplying monomer slurry to the feed end and the discharge end of the second perfusion pipeline 30 .

[0054] Continue reading Figure 1 and Figure 2 In some embodiments of the present invention, the first grouting pipeline 20 includes a grouting pipe 22, a pipeline connector 23 and a three-way joint A, one end of the grouting pipe 22 is connected to the delivery pipe body 10, the other end of the grouting pipe 22 is connected to the pipeline connector 23, the three-way joint A is arranged on the grouting pipe 22, the third grouting pipeline 40 is connected to the three-way joint A, and the first control valve 21 is arranged on the grouting pipe 22.

[0055] The grouting pipe 22 may be a metal pipe, such as an iron pipe, or a high-pressure hose, which can withstand a certain pressure and ensure a certain sealing performance.

[0056] In some embodiments of the present invention, the first injection pipeline 20 further includes a two-way joint 24, which is located between the grouting pipe 22 and the delivery pipe body 10 and is connected to the grouting pipe 22 and the delivery pipe body 10 respectively.

[0057] Of course, the two-way joint 24 may not be used, and the grouting pipe 22 may be directly connected to the delivery pipe body 10, as long as the interface of the delivery pipe body 10 matches the interface of the grouting pipe 22, the grouting pipe 22 can be sealed and connected to the delivery pipe body 10.

[0058] Continue reading Figure 1 and Figure 2 In some embodiments of the present invention, the second perfusion pipeline 30 includes an aggregate silo 32 and a mixing pipe 33. One end of the aggregate silo 32 is provided with a connecting flange D, the other end of the aggregate silo 32 is connected to the mixing pipe 33, and the end of the mixing pipe 33 away from the aggregate silo 32 is connected to the delivery pipe body 10; the second control valve 31 is arranged on the mixing pipe 33.

[0059] The aggregate silo 32 may be made of a seamless steel pipe of φ108×6 mm, or other pipes that can bear pressure and be sealed and connected to the adjacent mixing pipe 33.

[0060] The mixing material pipe 33 can be a metal pipe, such as an iron pipe, or a high-pressure hose, which can withstand a certain pressure and ensure a certain sealing performance.

[0061] Continue reading Figure 1 and Figure 2In some embodiments of the present invention, a pressure relief valve 34 is provided on the aggregate silo 32. The pressure relief valve 34 is provided near the connection flange D and is used to release the pressure in the aggregate silo 32 to avoid accidents when the aggregate feeding device is used to feed the aggregate next time, thereby ensuring the safety of the feeding system. The pressure relief valve 34 may be a ball valve.

[0062] Continue reading Figure 1 and Figure 2 In some embodiments of the present invention, the third perfusion pipeline 40 includes a material pipe 42 and a three-way connector B, and the material pipe 42 is connected to the second perfusion pipeline 30 through the three-way connector B; the third control valve 41 is arranged at a position of the material pipe 42 close to the first perfusion pipeline 20.

[0063] That is, the third perfusion pipeline 40 is divided into two paths through the three-way connector B and connected to the second perfusion pipeline 30, which can simplify the pipeline connection and improve the stability and reliability of the delivery system.

[0064] Figure 3 This is one of the schematic diagrams of the use status of the delivery system for underground drilling grouting provided by the embodiment of the present invention. Figure 4 This is the second schematic diagram of the use status of the delivery system for downhole drilling grouting provided by an embodiment of the present invention. Figure 5 This is the third schematic diagram of the use status of the delivery system for downhole drilling grouting provided by an embodiment of the present invention.

[0065] See also Figures 3 to 5 The embodiment of the present invention further provides a delivery method of a delivery system for downhole drilling grouting, comprising the following steps S100 and S200.

[0066] Step S100: when it is determined that the delivery system needs to deliver monomer slurry, the second control valve 31 and the third control valve 41 are controlled to be closed, and the first control valve 21 is controlled to be opened, so that the first perfusion pipeline 20 is conducted; Step S200: When it is determined that the delivery system needs to deliver mixed slurry, the second control valve 31 and the third control valve 41 are controlled to be closed, and the first control valve 21 is controlled to be opened; aggregate is delivered to the second perfusion pipeline 30 through the aggregate feeding device; when it is determined that the aggregate delivery is completed, the second control valve 31 and the third control valve 41 are controlled to be opened, and the first control valve 21 is controlled to be closed, so that the monomer slurry delivered by the grouting device drives the aggregate to be delivered; when it is determined that the aggregate delivery is completed, the first control valve 21 is controlled to be opened, the second control valve 31 and the third control valve 41 are controlled to be closed, and the second perfusion pipeline 30 is controlled to release pressure.

[0067] It is understandable that the delivery system for downhole drilling grouting provided by the embodiment of the present invention can be delivered in the following manner, taking the injection of low-concentration cement and fine-grained aggregate mixed slurry as an example for explanation: When performing downhole drilling grouting, under normal circumstances, conventional single-liquid fluid medium or two-liquid mixed fluid medium is first used for grouting. At this time, the first control valve 21 is opened, the second control valve 31 and the third control valve 41 are closed, and the first injection pipeline 20 is used for grouting.

[0068] In the case of poor grouting effect or failure to achieve the engineering purpose, consider activating the second grouting pipeline 30 to deliver aggregate. At this time, open the feeding port of the aggregate feeding device to start feeding fine-grained aggregate. After the aggregate feeding is completed, close the feeding port of the aggregate feeding device.

[0069] At this time, open the second control valve 31 and the third control valve 41, close the first control valve 21, and start injecting low-concentration cement and fine-grained aggregate mixed slurry. The main slurry flows through the route pipeline connector 23 → grouting pipe 22 → three-way joint A → material pipe 42 → three-way joint B → enters the aggregate silo 32 and the bypass injection pipeline 50 at the same time → delivery pipe body 10 → injection port.

[0070] When the aggregate is completely injected into the injection port, open the first control valve 21, close the second control valve 31 and the third control valve 41, open the pressure relief valve 34 to release the pressure, and complete one cycle of grouting of the fine-grained and low-concentration aggregate mixed slurry. According to the above process, the cyclic operation is continued to inject cement and aggregate mixed slurry.

[0071] When the engineering effect of the fine-grained low-concentration aggregate mixed slurry is not good, the second injection pipeline 30 is activated to deliver aggregate. At this time, the feeding port of the aggregate feeding device is opened to start feeding the coarse-grained high-concentration aggregate mixed slurry, and the cement and aggregate mixed slurry are continuously injected, and the cycle is repeated until the engineering purpose is achieved.

[0072] In some embodiments of the present invention, in the above step S200, the second control valve 31 and the third control valve 41 are controlled to be opened, and the first control valve 21 is controlled to be closed, so that the monomer slurry fed by the grouting device drives the aggregate to be delivered, and further includes: When it is determined that the flow rate of the mixed material in the second perfusion pipeline 30 is less than the preset flow rate, the fourth control valve 51 is controlled to open to connect the bypass perfusion pipeline 50, thereby accelerating the flow of the mixed material in the second perfusion pipeline 30 near the discharge port.

[0073] That is, when the mixed material in the second perfusion pipeline 30 is blocked, that is, the conveying speed of the mixed material is slowed down, at this time, the monomer slurry in the bypass perfusion pipeline 50 can be used to accelerate the flow of the mixed material near the discharge end of the second perfusion pipeline 30, thereby alleviating the blockage of the mixed material in the second perfusion pipeline 30.

[0074] It can be understood that the delivery method of the delivery system for downhole drilling grouting provided in the embodiment of the present invention can control the opening or closing of different control valves according to the grouting needs, so that the delivery system can be flexibly applied to different types of slurry delivery such as monomer slurry delivery, low-concentration small-particle aggregate slurry, and high-concentration large-particle aggregate slurry, so as to fill or repair underground cracks and pores and achieve the purpose of grouting and water plugging, and has strong adaptability.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A delivery system for underground drilling grouting, characterized in that: include: A delivery tube (10) adapted to be connected to the injection port; a first injection pipeline (20), one end of which is connected to the delivery pipe body (10), and the other end of which is suitable for connecting to a grouting device; a first control valve (21) is provided on the first injection pipeline (20); a second perfusion pipeline (30), one end of the second perfusion pipeline (30) being connected to the delivery pipe body (10), and the other end of the second perfusion pipeline (30) being suitable for connecting to an aggregate feeding device; a second control valve (31) is provided on the second perfusion pipeline (30); a third pouring pipeline (40), one end of the third pouring pipeline (40) being connected to a position of the first pouring pipeline (20) close to the grouting device, and the other end of the third pouring pipeline (40) being connected to a position of the second pouring pipeline (30) close to the aggregate feeding device; and a third control valve (41) being provided on the third pouring pipeline (40).

2. The delivery system for downhole drilling grouting according to claim 1, characterized in that: It also comprises a bypass perfusion pipeline (50), one end of which is connected to the third perfusion pipeline (40), and the other end of which is connected to an end of the second perfusion pipeline (30) away from the aggregate feeding device.

3. The delivery system for underground drilling grouting according to claim 2, characterized in that: The bypass irrigation pipeline (50) is provided with a fourth control valve (51), and the fourth control valve (51) is used to control the on-off of the bypass irrigation pipeline (50).

4. The delivery system for downhole drilling grouting according to any one of claims 1 to 3, characterized in that: The first grouting pipeline (20) comprises a grouting pipe (22), a pipeline connector (23) and a three-way joint A; one end of the grouting pipe (22) is connected to the delivery pipe body (10), and the other end of the grouting pipe (22) is connected to the pipeline connector (23); the three-way joint A is arranged on the grouting pipe (22); and the third grouting pipeline (40) is connected to the three-way joint A.

5. The delivery system for underground drilling grouting according to claim 4, characterized in that: The first grouting pipeline (20) further comprises a two-way joint (24), wherein the two-way joint (24) is located between the grouting pipe (22) and the delivery pipe body (10), and is respectively connected to the grouting pipe (22) and the delivery pipe body (10).

6. The delivery system for downhole drilling grouting according to any one of claims 1 to 3, characterized in that: The second pouring pipeline (30) comprises an aggregate silo (32) and a mixing material pipe (33); one end of the aggregate silo (32) is provided with a connecting flange, the other end of the aggregate silo (32) is connected to the mixing material pipe (33), and the end of the mixing material pipe (33) facing away from the aggregate silo (32) is connected to the delivery pipe body (10); The second control valve (31) is arranged on the mixing material pipe (33).

7. The delivery system for underground drilling grouting according to claim 6, characterized in that: The aggregate silo (32) is provided with a pressure relief valve (34), and the pressure relief valve (34) is arranged close to the connection flange.

8. The delivery system for downhole drilling grouting according to any one of claims 1 to 3, characterized in that: The third perfusion pipeline (40) comprises a material pipe (42) and a three-way connector B, and the material pipe (42) is connected to the second perfusion pipeline (30) via the three-way connector B; The third control valve (41) is arranged at a position of the material pipe (42) close to the first perfusion pipeline (20).

9. A delivery method for a delivery system for downhole drilling grouting according to any one of claims 1 to 8, characterized in that: The steps include: When it is determined that the delivery system needs to deliver monomer slurry, the second control valve (31) and the third control valve (41) are controlled to be closed, and the first control valve (21) is controlled to be opened, so that the first perfusion pipeline (20) is conducted; When it is determined that the delivery system needs to deliver mixed slurry, the second control valve (31) and the third control valve (41) are controlled to be closed, and the first control valve (21) is controlled to be opened; aggregate is delivered to the second pouring pipeline (30) through the aggregate delivery device; when it is determined that the delivery of aggregate is completed, the second control valve (31) and the third control valve (41) are controlled to be opened, and the first control valve (21) is controlled to be closed, so that the monomer slurry delivered by the grouting device drives the aggregate to be delivered; when it is determined that the delivery of aggregate is completed, the first control valve (21) is controlled to be opened, the second control valve (31) and the third control valve (41) are controlled to be closed, and the second pouring pipeline (30) is controlled to release pressure.

10. The delivery method of the delivery system for downhole drilling grouting according to claim 9, characterized in that: The method of controlling the second control valve (31) and the third control valve (41) to open and controlling the first control valve (21) to close so that the monomer slurry fed by the grouting device drives the aggregate to be delivered also includes: When it is determined that the flow rate of the mixed material in the second perfusion pipeline (30) is less than a preset flow rate, the fourth control valve (51) is controlled to open so as to allow the bypass perfusion pipeline (50) to be conducted, thereby accelerating the flow of the mixed material in the second perfusion pipeline (30) close to the discharge port.

Images