Rotation type grouting device and grouting process

Abstract

The invention relates to a rotation type grouting device and a grouting process, and belongs to the technical field of grouting pipes. The device comprises a slurry proportioning bin, a grouting pump, a grouting main pipe, a flow divider, a flow dividing main pipe and a Y-shaped flow dividing pipe. Two flow dividing channels are arranged in the flow dividing main pipe, on-off is controlled through the flow divider, the Y-shaped flow dividing pipe is in threaded connection with the flow dividing main pipe and communicated with the grouting valve, a slurry circulation loop is formed, and pipeline blockage is avoided. The device further comprises a grout proportioning bin capable of controlling the water-cement ratio, and the quality of grouting liquid is ensured. And in the process aspect, an alternate grouting mode is adopted, after grouting on one side is completed, grouting on the other side continues, the continuing time between hole sites is shortened through alternate operation, and the grouting efficiency is improved. And meanwhile, circular flowing of the slurry is achieved through the flow dividing branch pipes, and pipeline blockage caused by slurry retention is effectively prevented. The grouting efficiency can be improved, slurry waste is reduced, the grouting quality is ensured, and the method is suitable for complex roadway reinforcement operation.

Description

Technical Field

[0001] The invention belongs to the technical field of grouting pipes and relates to a rotation-type grouting device and a grouting process. Background Art

[0002] As coal mining gradually advances to deeper depths, the deterioration of surrounding rock conditions has become a problem that needs to be solved urgently, especially in soft rock tunnels, where the surrounding rock has poor self-stabilization ability and is prone to large-scale deformation and collapse. In order to ensure the safety and stability of the tunnel, grouting reinforcement technology is one of the commonly used measures. Grouting technology injects cement slurry or other reinforcement materials into the cracks of the surrounding rock to fill the pores and cracks in the rock mass, thereby enhancing the bearing capacity of the surrounding rock, reducing surrounding rock deformation, and ensuring construction safety.

[0003] In the development of grouting technology, traditional grouting processes and equipment have some significant deficiencies, which affect their application effects. Specifically, the following shortcomings are common in the existing technology:

[0004] Low grouting efficiency: Traditional grouting technology usually adopts a single-hole grouting mode, that is, grouting in one hole can be carried out only after grouting in one hole is completed. This method results in a long connection time between different holes and low grouting efficiency, especially in the case of poor soft rock surrounding rock conditions. The waste of time directly affects the support effect of the surrounding rock.

[0005] Frequent pipe blockage: As the existing grouting equipment cannot form a complete slurry circulation system, when the slurry stays in the pipeline for too long, it is easy to settle and solidify, resulting in pipe blockage. Especially under complex geological conditions, such as uneven rock formations or complex crack distribution, the slurry is difficult to distribute evenly, and the pipe blockage phenomenon is more serious.

[0006] Inaccurate slurry ratio: Traditional grouting equipment does not accurately control the slurry ratio, especially when the underground working environment is complex and the construction conditions are limited, it is difficult to ensure the stability of the grouting water-cement ratio. Too high or too low water-cement ratio will directly affect the grouting quality and lead to unsatisfactory surrounding rock reinforcement effect.

[0007] Therefore, the existing grouting technology and equipment have exposed many problems in practical applications, and they are in urgent need of improvement and optimization to improve grouting efficiency, reduce construction costs, and ensure the support effect of surrounding rock. Summary of the invention

[0008] In view of this, the object of the present invention is to solve the above-mentioned problems and to provide a rotation-type grouting device and a grouting process.

[0009] In order to achieve the above object, the present invention provides the following technical solutions:

[0010] A rotational grouting device, comprising a slurry proportioning bin, a grouting pump, a grouting main pipe, a diverter, a diverter main pipe, and a Y-shaped diverter pipe connected in series in sequence; the diverter main pipe is divided into two diverter channels, and the grouting main pipe and the two diverter channels are controlled to be on and off by the diverter; the inlet of the Y-shaped diverter pipe is connected to the diverter main pipe through a thread, and the two outlets of the Y-shaped diverter pipe are connected to the two diverter channels in a one-to-one correspondence; the outlets of the two Y-shaped diverter pipes are both provided with a grouting valve and a grouting joint for conveying slurry to the outside;

[0011] The side walls of the two diversion channels are provided with diversion branches, and the diversion straight pipe connects the diversion channel with the slurry proportioning bin, so that a slurry circulation loop is formed between the slurry proportioning bin, the grouting pump and the diversion main pipe; the diversion branch pipe is provided with a slurry stop valve.

[0012] Furthermore, pressure gauges are provided on the two outlets of the Y-shaped shunt pipe.

[0013] Furthermore, the diameter of the branch pipe is 1 / 2 of the diameter of the main pipe.

[0014] Furthermore, the main flow distribution pipe is connected to the bottom of the Y-shaped flow distribution pipe through a threaded sleeve.

[0015] Furthermore, the diverter is in the shape of a hollow sphere, on which a handle for driving the ball head to rotate is connected via a ball shaft, and the sphere has two flow openings symmetrical with respect to the ball shaft, one of which is connected to the grouting main pipe, and the other is connected to two diversion channels, and the on and off is controlled by rotating the handle.

[0016] Furthermore, a plurality of water volume determining ports are provided on the side of the slurry proportioning bin, and the water volume determining ports are provided with pluggable conical plugs for sealing.

[0017] A rotation grouting process, using the rotation grouting device as described above, comprises the following steps during grouting:

[0018] Step S1, before grouting begins, the water-cement ratio of the grouting liquid is configured in the slurry proportioning bin, that is, the conical plug at the position corresponding to the set water volume is pulled out, water is added to the slurry proportioning bin until water flows back from the water volume determination port, the conical plug is inserted back to block the water outlet, and then a set amount of standard cement is added, and the mixture is stirred evenly to ensure that the water-cement ratio is 0.6;

[0019] Step S2, connect a grouting anchor cable to each of the two outlets of the Y-type diverter pipe, open the grouting stop valve on one side of the Y-type diverter pipe, close the grouting stop valve on the other side, adjust the diverter so that the flow channel opening is located in the middle of the two diverter channels to ensure that both diverter channels can be filled with grout; close all the grouting stop valves on the grouting diverter branch pipe and start grouting; when the grouting of the grouting anchor cable on one side is completed, switch to the grouting of the grouting anchor cable on the other side, and at the same time move the grouting facilities on this side to the next grouting position for installation, and perform alternating grouting in rotation.

[0020] Furthermore, when a tight connection situation occurs, close the slurry stop valve at the outlet of the Y-type diversion pipe, open the slurry stop valve on one side of the diversion branch pipe at the same time, and adjust the diverter so that the grouting main pipe is only connected to the slurry stop valve on that side. Do not close the grouting pump to allow the slurry to circulate inside to avoid pipe blockage.

[0021] The beneficial effects of the present invention are:

[0022] 1. The present invention forms a system for slurry circulation through components such as a slurry proportioning bin, a grouting main pipe, a diverter, and a Y-type diverter pipe. When an emergency or pause occurs during the grouting process, the slurry inside the system can continue to flow in the circulation channel without being retained in the pipeline, thereby avoiding the problem of slurry solidification and pipe clogging. In addition, by accurately controlling the slurry flow rate, the waste of slurry during the grouting process is reduced, saving material costs. Especially in the complex environment of underground mines, the equipment can better adapt to different working conditions and reduce economic losses caused by slurry waste.

[0023] 2. The present invention designs a rotation-type grouting device and adopts a dual-channel shunt structure, which allows the grouting of one hole to be immediately switched to another hole for grouting when the grouting is completed, and the grouting equipment is moved to the next location for installation, forming an alternating rotation-type grouting operation. This rotation-type grouting process breaks the single-hole limitation of the traditional grouting process, significantly shortens the connection time between holes, and improves the overall efficiency of grouting. Especially in large-scale grouting projects, it has obvious time and cost advantages.

[0024] 3. The slurry proportioning bin of the present invention is equipped with a water volume determination port. Through the design of the water volume determination port and the control of the conical plug, the water-cement ratio of grouting can be accurately controlled during the underground construction process to ensure the stability of the grouting slurry. At the same time, the proportioning bin is controlled by the set standard cement bag (50kg) quantity. After adding water to the determined amount of water, cement is added and stirred evenly to ensure that the proportion of the slurry reaches the optimal state. Accurate proportioning control can effectively avoid grouting quality problems caused by too thin or too thick slurry, improve the reinforcement effect of the tunnel surrounding rock, and ensure construction safety.

[0025] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0027] Figure 1 It is a schematic diagram of the overall structure of the rotation-type grouting device in the present invention.

[0028] Figure 2 It is a schematic diagram of the pipeline for slurry circulation in the present invention.

[0029] Figure numerals: 1-slurry proportioning bin; 2-grouting pump; 3-grouting main pipe; 4-diverter; 5-diverter main pipe; 6-Y-type diverter pipe; 7-diverter branch pipe; 8-slurry stop valve; 9-threaded sleeve; 10-pressure gauge; 11-grouting joint; 12-grouting valve; 13-water volume determination port; 14-conical plug. DETAILED DESCRIPTION

[0030] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0031] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0032] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0033] Please refer to Figures 1-2 , which is a rotational grouting device, comprising a slurry proportioning bin 1, a grouting pump 2, a grouting main pipe 3, a diverter 4, a diverter main pipe 5, and a Y-type diverter pipe 6 which are connected in series in sequence; the diverter main pipe 5 is divided into two diverter channels, and the grouting main pipe 3 and the two diverter channels are controlled by the diverter 4; the inlet of the Y-type diverter pipe 6 is connected to the diverter main pipe 5 through a threaded sleeve 9, and the two outlets of the Y-type diverter pipe 6 are connected to the two diverter channels in a one-to-one correspondence; the outlets of the two Y-type diverter pipes 6 are both provided with a grouting valve 12 and a grouting joint 11 for conveying slurry to the outside;

[0034] The side walls of the two diversion channels are provided with diversion branches 7, and the diameter of the diversion branches 7 is 1 / 2 of the diameter of the diversion main pipe 5. The diversion straight pipe connects the diversion channel with the slurry proportioning bin 1, so that a slurry circulation loop is formed between the slurry proportioning bin 1, the grouting pump 2, and the diversion main pipe 5; the diversion branch pipe 7 is provided with a slurry stop valve 8.

[0035] Pressure gauges 10 are also provided on the two outlets of the Y-type shunt pipe 6. The shunt 4 is in the shape of a hollow sphere, on which a handle for driving the ball head to rotate is connected through a ball shaft, and the sphere is provided with two flow passages symmetrical to the ball shaft, one of which is connected to the grouting main pipe 3, and the other is connected to the two shunt channels, and the on-off is controlled by rotating the handle.

[0036] A plurality of water volume determining ports 13 are provided on the side of the slurry proportioning bin 1 , and the water volume determining ports 13 are provided with pluggable conical plugs 14 for sealing.

[0037] A rotation grouting process, using the rotation grouting device in this embodiment, includes the following steps during grouting:

[0038] Step S1, before grouting begins, configure the water-cement ratio of the grouting liquid in the slurry proportioning bin 1, that is, pull out the conical plug 14 at the position corresponding to 30L of water, add water to the slurry proportioning bin 1, until the water volume determination port 13 returns water, insert the conical plug 14 back to block the water outlet, add a bag of standard cement (50kg), stir evenly, and ensure that the water-cement ratio is 0.6;

[0039] Step S2, connect a grouting anchor cable to each of the left and right outlets of the Y-type diverter pipe 6, open the grouting stop valve 8 on the left side of the Y-type diverter pipe 6, close the grouting stop valve 8 on the right side, adjust the diverter 4 so that the flow channel opening is located in the middle of the two diverter channels to ensure that both diverter channels can be filled with grout; close all the grouting stop valves 8 on the grouting diverter branch pipe 7 and start grouting; when the grouting of the grouting anchor cable on the left side is completed, switch to the grouting of the grouting anchor cable on the right side, and at the same time move the grouting facilities on the left side to the next grouting position for installation, and perform alternating grouting in rotation.

[0040] During the grouting process, when a tight connection situation occurs, close the slurry stop valve 8 at the outlet of the Y-shaped diversion pipe 6, and at the same time open the slurry stop valve 8 on one side of the diversion branch pipe 7, and adjust the diverter 4 so that the grouting main pipe 3 is only connected to the slurry stop valve 8 on that side. Do not close the grouting pump 2, so that the slurry can circulate inside to avoid pipe blockage.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A shift grouting device, characterized in that: It includes a slurry proportioning bin, a grouting pump, a grouting main pipe, a diverter, a diverter main pipe, and a Y-shaped diverter pipe which are connected in series in sequence; the diverter main pipe is divided into two diverter channels, and the grouting main pipe and the two diverter channels are connected and disconnected by the diverter; The inlet of the Y-shaped shunt pipe is connected to the shunt main pipe through a thread, and the two outlets of the Y-shaped shunt pipe are connected to the two shunt channels in a one-to-one correspondence; the outlets of the two Y-shaped shunt pipes are both provided with a grouting valve and a grouting joint for conveying slurry to the outside; The side walls of the two diversion channels are provided with diversion branches, and the diversion straight pipe connects the diversion channel with the slurry proportioning bin, so that a slurry circulation loop is formed between the slurry proportioning bin, the grouting pump and the diversion main pipe; the diversion branch pipe is provided with a slurry stop valve.

2. The shift-type grouting device according to claim 1, characterized in that: Pressure gauges are provided on the two outlets of the Y-shaped shunt pipe.

3. The shift-type grouting device according to claim 1 is characterized in that: The diameter of the branch pipe is 1 / 2 of the diameter of the main pipe.

4. The shift-type grouting device according to claim 1, characterized in that: The flow dividing main pipe is connected to the bottom of the Y-shaped flow dividing pipe through a threaded sleeve.

5. The shift-type grouting device according to claim 1, characterized in that: The diverter is in the shape of a hollow sphere, on which a handle for driving the ball head to rotate is connected via a ball shaft. The sphere has two flow openings symmetrical with respect to the ball shaft, one of which is connected to the grouting main pipe, and the other is connected to two diversion channels, and the on and off is controlled by rotating the handle.

6. The shift grouting device according to claim 1, characterized in that: A plurality of water volume determining ports are provided on the side of the slurry proportioning bin, and the water volume determining ports are provided with pluggable conical plugs for sealing.

7. A rotation grouting process, characterized in that: The rotation-type grouting device according to any one of claims 1 to 6 is used, and the grouting process includes the following steps: Step S1, before grouting begins, the water-cement ratio of the grouting liquid is configured in the slurry proportioning bin, that is, the conical plug at the position corresponding to the set water volume is pulled out, water is added to the slurry proportioning bin until water flows back from the water volume determination port, the conical plug is inserted back to block the water outlet, and then a set amount of standard cement is added, and the mixture is stirred evenly to ensure that the water-cement ratio is 0.6; Step S2, connect a grouting anchor cable to each of the two outlets of the Y-type diverter pipe, open the grouting stop valve on one side of the Y-type diverter pipe, close the grouting stop valve on the other side, adjust the diverter so that the flow channel opening is located in the middle of the two diverter channels to ensure that both diverter channels can be filled with grout; close all the grouting stop valves on the grouting diverter branch pipe and start grouting; when the grouting of the grouting anchor cable on one side is completed, switch to the grouting of the grouting anchor cable on the other side, and at the same time move the grouting facilities on this side to the next grouting position for installation, and perform alternating grouting in rotation.

8. The rotation grouting process according to claim 7 is characterized in that: When a tight connection situation occurs, close the slurry stop valve at the outlet of the Y-type diversion pipe, open the slurry stop valve on one side of the diversion branch pipe at the same time, and adjust the diverter so that the grouting main pipe is only connected to the slurry stop valve on that side. Do not close the grouting pump to allow the slurry to circulate inside to avoid pipe blockage.

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