A mixing grouting device and method for adding small proportion components and adjusting the proportion

Abstract

The present invention discloses a mixing grouting device for adding small-proportion components and adjusting the proportion, comprising a main slurry conveying device and a micro-ratio adder, wherein: the main slurry conveying device comprises: a paddle wheel chamber and a paddle wheel, wherein a transmission shaft is coaxially sleeved in the center of the paddle wheel chamber and the paddle wheel; a slurry input pipe is used to connect to the grouting machine to directly convey the slurry into the small chamber, and the slurry drives the paddle wheel to rotate, thereby driving the transmission shaft to rotate; there are one or two micro-ratio adders, which are connected to the left or right end of the transmission shaft and are connected to a micro-component inlet pipe and a micro-component outlet pipe, and the micro-component outlet pipe is connected to the terminal side shell pipeline of the main slurry output pipe; the micro-ratio adder moves with the rotation of the transmission shaft to realize the output of the micro-component and mix it with the main slurry. Using this device, during the grouting process, the ratio of the main slurry to the micro-component is kept constant, avoiding premature reaction and solidification of the main slurry, clogging the pipeline, and changing the amount of micro-component added.

Description

Technical Field

[0001] The invention belongs to the technical field of underground engineering grouting reinforcement, and in particular relates to a mixed grouting device and method for adding small proportion components with adjustable proportions. Background Art

[0002] Underground engineering construction encounters increasingly complex geological conditions, making grouting a crucial and indispensable component. Grouting's effectiveness in improving strata depends on two key factors: setting time and grouting strength. These factors together determine the grout's diffusion range (injectability) and the self-stabilizing capacity of the surrounding rock after reinforcement.

[0003] At present, due to the huge amount of material used in grouting reinforcement of strata (for example, in medium-section tunnels, each grouting reinforcement cycle consumes hundreds of cubic meters of slurry), and considering the difficulty of obtaining materials and their price, there are two mainstream grouting materials:

[0004] One is single-liquid cement slurry, which is directly injected into the formation through the grouting hole. The slurry has strong fluidity, good diffusion effect, and high slurry stone strength (above 20MPa). However, its setting time often exceeds 6 hours. Under dynamic water conditions, it is washed away by the water flow before it sets. In addition, the grouting reinforcement range is difficult to control. The slurry preferentially flows along the pores and cracks, and slurry leakage often occurs within a range of hundreds of meters, resulting in insufficient grouting in the target reinforcement area and slurry contamination in other areas.

[0005] The second is cement-water glass double-liquid slurry, which uses double pipelines to transport cement single-liquid slurry and water glass slurry respectively, mixes them at the mouth of the grouting hole, and then injects them into the formation. The setting time after mixing is 30 seconds to 2 minutes, which is suitable for blocking moving water and larger cracks, but the diffusion effect is poor, and the slurry is easy to clump and accumulate continuously, causing large deformation of the formation and endangering the safety of surrounding buildings (structures); and the stone strength of the double-liquid slurry is relatively low (about 5MPa), and the durability is poor. It gradually collapses in a short period of time (14 days-56 days), and the formation reinforcement effect is limited.

[0006] Therefore, a method for optimizing the use of mainstream grouting materials is needed, that is, by adding a trace amount of liquid accelerator (such as 5%-8%) to the cement single-liquid slurry, the setting time of the cement single-liquid slurry can be controlled to about 5 minutes, which can not only meet the effective control of the grouting range, but also ensure sufficient stone strength and durability.

[0007] However, the current grouting equipment cannot support the implementation of this practice. First, the grouting machine has a limited speed in consuming slurry. After the slurry is mixed, it is placed in a slurry storage barrel. Even if a trace amount of accelerator is added, its setting time must be ensured to be greater than 1 hour. Otherwise, the slurry may not be injected and set, or the grouting pipeline may be blocked. Secondly, the current double-liquid grouting machine is used to mix the two slurries at the mouth of the grouting hole. The mixing ratio is mostly 1:1 by volume. A few grouting machines can achieve a volume ratio of 1:4 through a differential, which still cannot solve the problem of trace addition. Summary of the Invention

[0008] The purpose of the present invention is to provide a mixing grouting device and method for adding small-proportion components with adjustable proportions, which realizes the addition of trace components in a fixed proportion at the end of the grouting pipeline, optimizes the slurry performance, and keeps the ratio of the main slurry and the trace components at a constant value during the grouting process, avoiding the main slurry from reacting and solidifying prematurely and clogging the pipeline.

[0009] The present invention adopts the following technical solution: a mixing grouting device for adding small proportion components and adjusting the proportion, comprising a main slurry conveying device and a micro-ratio adding device, wherein: the main slurry conveying device comprises: a paddle wheel chamber and a paddle wheel, wherein:

[0010] The paddle wheel chamber is a horizontally arranged closed cylindrical shell, and the front and rear opposite sides of the side shell are connected to the main slurry inlet pipe and the main slurry outlet pipe respectively;

[0011] The paddle wheel is a multi-blade cylindrical structure, which is coaxially arranged in the paddle wheel chamber. Its outer contour matches the inner contour of the paddle wheel chamber, dividing the paddle wheel chamber into multiple independent small chambers in the circumferential direction. A transmission shaft is coaxially sleeved in the center of the paddle wheel chamber and the paddle wheel.

[0012] The main slurry input pipe is used to connect with the grouting machine to transport the slurry directly into the small chamber, and the slurry drives the meter wheel to rotate, thereby driving the transmission shaft to rotate. During the rotation of the meter wheel, the slurry flows out of the small chamber to the main slurry output pipe in sequence;

[0013] There are one or two trace constant ratio adders, connected to the left or right end of the transmission shaft, and when there are two, one at each end; and connected with a trace component inlet pipe and a trace component outlet pipe, and the trace component outlet pipe is connected to the terminal side shell pipeline of the main slurry output pipe;

[0014] The trace constant ratio adder moves with the rotation of the transmission shaft to realize the output of trace components and mix them with the main slurry; and when the speed of the metering wheel changes, the addition amount of the trace components changes, so that the ratio of the main slurry and the trace components is constant during the grouting process.

[0015] Furthermore, each micro-ratio adder includes a transmission disc, a pin shaft and a reciprocating rod;

[0016] The transmission disc is a circular disc that is fixed on the left or right end of the transmission shaft and rotates with the rotation of the transmission shaft;

[0017] The pin is a cylindrical shaft, one end of which is detachably connected to the transmission disc and the other end of which is sleeved with a push wheel;

[0018] The reciprocating rod includes a rectangular frame and a variable cross-section push rod, wherein:

[0019] A rectangular frame is vertically arranged on the left or right outer side of the left or right end transmission disk, and the two are parallel. The inner spacing of the two vertical sides of the rectangular frame is consistent with the diameter of the push wheel, and is used as a track for the push wheel to slide up and down. Horizontal reciprocating rails are set at the upper and lower ends of the rectangular frame. The upper and lower sides of the rectangular frame are located in the horizontal reciprocating rails at the corresponding ends and can slide back and forth along the horizontal reciprocating rails.

[0020] There are two variable-section push rods, which are in the same plane as the rectangular frame, spaced apart from each other and horizontally connected to the front and rear vertical sides of the rectangular frame;

[0021] The distal end of each variable-section push rod is provided with a horizontal piston cylinder, and the distal end section of the piston cylinder is a closed cylinder body, the end of the closed cylinder body is provided with a trace component inlet pipe and a trace component outlet pipe, and the trace component outlet pipes on the two piston cylinders are connected in parallel; the pistons in the two piston cylinders are connected to the distal end of the variable-section push rod on their side;

[0022] The push wheel is used to: under the drive of the transmission disk, slide up and down along the rectangular frame, and push the rectangular frame to slide forward or backward, thereby pushing the piston cylinders on the front and rear sides in sequence. During the circumferential movement of the transmission disk, the trace components flow out continuously from the trace component outlet pipes on the front and rear sides in sequence.

[0023] Furthermore, a plurality of proportional holes are provided on the outer wall of the transmission disk, and the plurality of proportional holes are arranged at equal intervals in the same radial direction; the plurality of proportional holes are detachably connected to the pin shaft in sequence, and are used to change the radius of the circular motion trajectory of the pin shaft, and change the distance of the horizontal upward reciprocating motion of the cross-section push rod, so as to change the outflow amount of the trace component.

[0024] Furthermore, a cyclone mixer is connected to the end of the main slurry output pipe, which is a horizontally placed frustum-shaped cavity structure with both ends connected in the axial direction, wherein the small end is the slurry outlet end and the large end is the slurry inlet end.

[0025] Furthermore, a swirl cone is coaxially arranged in the swirl mixer. The swirl cone is a cone with a length and diameter smaller than the swirl mixer. The tip is facing the large end of the swirl mixer. A variable diameter annular channel is formed between the swirl mixer and the swirl mixer in its section. The swirl mixing chamber is located in the swirl mixer and at the rear end of the swirl cone. The swirl mixing chamber is a chamber for fully mixing the main slurry and the trace component solution.

[0026] Furthermore, the variable-section push rod located at the upper end of the rectangular frame is located at 1 / 4 of the length from the upper end to the lower end of the rectangular frame, and the variable-section push rod located at the lower end of the rectangular frame is located at 1 / 4 of the length from the lower end to the upper end of the rectangular frame.

[0027] Furthermore, the variable-section push rod includes a fan-shaped segment and a straight line segment that smoothly shrink from large to small from the rectangular frame end to the distal end.

[0028] Furthermore, each trace component inlet pipe is connected to a slurry storage barrel. On the same left or right side, the front and rear slurry storage barrels are used to hold the same trace components to be added; the slurry storage barrels on different left and right sides are used to hold the same or different trace components to be added.

[0029] Furthermore, a one-way valve is provided on each of the trace component inlet pipe and the trace component outlet pipe.

[0030] The present invention also discloses a grouting method of the above-mentioned mixing grouting device with a small-proportion component added and an adjustable ratio, characterized in that the grouting method is as follows:

[0031] Step 1: The main slurry is input into the paddle wheel chamber from the main slurry input pipe and is input into the small chamber opposite to it. During the flow of the main grouting liquid, the paddle wheel is driven to rotate and the transmission shaft is driven to rotate. When the transmission shaft rotates, the main grouting liquid is sequentially input into each small chamber and continuously provides power for the rotation of the paddle wheel. The grouting liquid flows into the main slurry output pipe.

[0032] Step 2: The transmission shaft rotates, driving the transmission disc to rotate, and the pin shaft drives the push wheel to slide up and down in the rectangular frame, and pushes the rectangular frame to slide back and forth along the horizontal reciprocating track, and the variable-section push rod pushes the front or rear piston to reciprocate toward or away from the end in the piston cylinder; when the piston moves away from the end, the trace components in the slurry storage barrel enter the closed cylinder body through the trace component inlet pipe; when the piston moves toward the end, the trace components flow out from the trace component outlet pipe and merge into the main slurry output pipe; wherein, the trace components in the front and rear piston cylinders flow out in sequence and flow into the main slurry output pipe without interruption;

[0033] Step 3: The grouting liquid and trace components flow into the cyclone mixer. The mixed slurry sticks to the cyclone cone and flows through the annular channel with a variable diameter. After flowing through the cyclone cone, a cyclone is formed in the forward direction and enters the cyclone mixing chamber. The main slurry and the added trace component solution are fully mixed and reacted, and then flow out after mixing.

[0034] The beneficial effects of the present invention are: 1. It realizes the addition of trace components in a fixed proportion at the end of the grouting pipeline, optimizes the slurry performance, and avoids the main slurry from reacting and solidifying prematurely and clogging the pipeline. 2. A plurality of proportional holes are set on the transmission disk. The proportional holes are at different distances from the center of the transmission disk, and cooperate with the pin shafts that can be detachably installed therein. The position of the pin shaft installation represents the addition ratio of the trace components. The addition amount of the trace components can be adjusted by installing the pin shafts in different proportional holes. 3. Two trace constant ratio adders and corresponding piston cylinders are set. The two trace constant ratio adders can work at the same time, or one can work alone. When working at the same time, two different trace components can be added, or one trace component can be added at the same time. 4. During the flow of the grouting liquid, the transmission shaft is pushed to rotate to drive the transmission disk to rotate, and the push wheel and the rectangular frame are matched to drive the variable cross-section push rod to move in the horizontal direction, pushing the trace components to flow out from the trace component outlet pipe without the need for additional energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the structure of a mixing grouting device that adds small proportions of components and can adjust the proportions;

[0036] Figure 2 A schematic diagram of the structure of the other side of a mixing grouting device that adds small proportions of components and can adjust the proportions;

[0037] Figure 3 The figure shows a cross-sectional view of a mixing grouting device with adjustable proportions of components added in small proportions.

[0038] Figure 4 The bb cross-sectional view is a mixing grouting device that adds small proportions of components and can adjust the proportions;

[0039] Figure 5 A cross-sectional view of a mixing grouting device cc with adjustable proportions of components added in small proportions;

[0040] Figure 6 A schematic diagram of the flow of trace components on one side of a mixing grouting device for adding small proportion components and adjusting the proportion;

[0041] Figure 7 A schematic diagram of the flow of trace components on the other side of a mixing grouting device that adds small proportions of components and can adjust the proportions;

[0042] Figure 8 It is a structural diagram of a cyclone mixer;

[0043] Figure 9 It is a cross-sectional schematic diagram of a cyclone mixer;

[0044] Figure 10A schematic diagram of the overall structure of a mixing grouting device that adds small proportions of components and can adjust the proportions;

[0045] Including: 1. Grouting machine; 2. Slurry storage tank; 3. Micro-ratio feeder; 4. Cyclone mixer;

[0046] 31. Housing; 32. Bracket; 33-1. First slurry storage barrel; 33-2. Second slurry storage barrel; 33-3. Third slurry storage barrel; 33-4. Fourth slurry storage barrel;

[0047] 34-1. Metering wheel; 34-2. Metering wheel chamber; 34-3. Drive shaft;

[0048] 35-1. Transmission plate; 35-2. Proportional hole; 35-3. Pin; 35-4. Push wheel; 36. Reciprocating rod; 37. Reciprocating rail; 38-1. First micro-piston cylinder; 38-2. Second micro-piston cylinder; 39. One-way valve;

[0049] 41. Swirl cone; 42. Swirl mixing chamber; DETAILED DESCRIPTION

[0050] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0051] The present invention provides a mixing grouting device for adding small proportion components and adjusting the proportion, such as Figure 4 and 10 As shown, it includes: a main slurry conveying device and a micro-ratio adder 3.

[0052] The main slurry conveying device includes: a metering wheel chamber 34-2 and a metering wheel 34-1, wherein the metering wheel chamber 34-2 is a horizontally arranged closed cylindrical shell, and the front and rear opposite sides of the side shell are respectively connected to the main slurry input pipe and the main slurry output pipe.

[0053] The paddle wheel 34-1 is a multi-bladed cylindrical structure, coaxially arranged in the paddle wheel chamber 34-2. Its outer contour matches the inner contour of the paddle wheel chamber 34-2, dividing the paddle wheel chamber 34-2 into multiple independent small chambers in the circumferential direction. A transmission shaft 34-3 is coaxially sleeved in the center of the paddle wheel chamber 34-2 and the paddle wheel 34-1.

[0054] The main slurry input pipe is used to connect with the grouting machine 1 to transport the slurry directly into the small chamber, and the slurry drives the meter wheel 34-1 to rotate, thereby driving the transmission shaft 34-3 to rotate. During the rotation of the meter wheel 34-1, the slurry flows out of the small chamber to the main slurry output pipe in turn. The amount of main slurry flowing through the main slurry output pipe is proportional to the number of rotations of the meter wheel 34-1.

[0055] There are one or two trace constant ratio adders 3, which are connected to the left or right end of the transmission shaft 34-3, and when there are two, one is at each end; and they are connected with a trace component inlet pipe and a trace component outlet pipe, and the trace component outlet pipe is connected to the main slurry output pipe; the trace constant ratio adder 3 moves with the rotation of the transmission shaft 34-3 to realize the output of the trace component and mix it with the main slurry; and when the speed of the metering wheel 34-1 changes, the addition amount of the trace component is changed, so that the ratio of the main slurry and the trace component is kept constant during the grouting process.

[0056] like Figure 5 、 6 As shown in FIG. 7 , each micro-ratio adder 3 includes a transmission disk 35 - 1 , a pin 35 - 3 and a reciprocating rod 36 ; the transmission disk 35 - 1 is a circular disk, which is fixedly mounted on the left or right end of the transmission shaft 34 - 3 and rotates with the rotation of the transmission shaft 34 - 3 .

[0057] The pin shaft 35-3 is a cylindrical shaft, one end of which is detachably connected to the transmission plate 35-1, and the other end of which is sleeved with a push wheel 35-4; the reciprocating rod 36 includes: a rectangular frame, a variable cross-section push rod and a piston cylinder 38, wherein:

[0058] A rectangular frame is vertically arranged on the left or right outer side of the left or right end transmission disk 35-1, and the two are parallel. The inner spacing of the two vertical sides of the rectangular frame is consistent with the diameter of the push wheel 35-4, and is used as a track for the push wheel 35-4 to slide up and down; horizontal reciprocating rails 37 are set at the upper and lower ends of the rectangular frame, and the upper and lower sides of the rectangular frame are located in the horizontal reciprocating rails 37 at the corresponding ends, and can slide back and forth along the horizontal reciprocating rails 37.

[0059] There are two variable-section push rods, which are in the same plane as the rectangular frame, spaced apart from each other and horizontally connected to the front and rear vertical sides of the rectangular frame.

[0060] Each variable-section push rod has a horizontal piston cylinder 38 at its distal end. The distal end of the piston cylinder 38 is a closed cylinder, with a trace component inlet and outlet pipes installed at the ends. The outlet pipes on the two piston cylinders 38 are connected in parallel. The pistons in the two piston cylinders 38 are connected to the distal end of the variable-section push rod on their side. A one-way valve 39 is installed on each of the trace component inlet and outlet pipes.

[0061] Driven by the transmission disc 35-1, the push wheel 35-4 slides up and down along the rectangular frame, pushing the frame forward or backward, thereby sequentially pushing the front and rear piston cylinders 38. During one circumferential movement of the transmission disc 35-1, the trace component flows out of the front and rear trace component outlet pipes in a continuous manner. The circular motion of the push wheel 35-4, acting on the reciprocating rod 36, further eliminates the impact of its vertical motion on the reciprocating rod 36, eliminating jamming and facilitating smoother horizontal reciprocating motion of the reciprocating rod 36.

[0062] A plurality of proportional holes 35-2 are provided on the outer wall of the transmission disc 35-1, and the plurality of proportional holes 35-2 are arranged at equal intervals in the same radial direction; the plurality of proportional holes 35-2 are detachably connected to the pin shaft 35-3 in sequence, and are used to change the radius of the circular motion trajectory of the pin shaft 35-3, change the distance of the horizontal upward reciprocating motion of the cross-section push rod, and thus change the outflow amount of the trace component.

[0063] Since the pin 35-3 is installed in the proportional hole 35-2, the distance between the push wheel 35-4 and the center of the transmission plate 35-1 is R, and the horizontal movement range of the push wheel 35-4 during circular motion is 2R. The reciprocating distance of the reciprocating rod 36 is also 2R. When the cross-sectional area of ​​the piston is fixed, the injection amount of the additive is proportional to R.

[0064] The variable-section push rod at the upper end of the rectangular frame is located 1 / 4 of the way from the upper to the lower end of the rectangular frame, while the variable-section push rod at the lower end is located 1 / 4 of the way from the lower to the upper end of the rectangular frame. This ensures optimal stress conditions and minimizes wear on each component during operation. The variable-section push rod consists of a fan-shaped segment and a straight line segment that smoothly tapers from the rectangular frame end to the distal end.

[0065] A one-way valve 39 is provided on each of the trace component inlet pipe and the trace component outlet pipe, and the outlet of the one-way valve 39 is facing the flow direction of the slurry; multiple trace component outlet pipes are connected in parallel and connected to the end pipeline of the main slurry output pipe, specifically, connected to the side wall near the end.

[0066] like Figure 1 、 2 As shown in Figures 3 and 4, the micro-ratio adder 3 and the reciprocating rod 36 are both arranged in a shell 31. The shell 31 plays a role of protection and support. A bracket 32 ​​is provided at the bottom of the shell. The bracket 32 ​​is a metal strip stretched outward at the four corners. A horizontal tie bar is provided in the middle of the bracket 32 ​​to further enhance its stability.

[0067] During the grouting process, the piston absorbs the solution and needs to overcome a very small force, while the piston outputs the solution and needs to overcome a larger grouting pressure. Therefore, the variable-section push rod of the reciprocating rod 36 uses the upper and lower semicircles of the transmission disk 35-1 as the dividing line. Taking the lower semicircular arc movement as an example, the push wheel 35-4 pushes the reciprocating rod 36 to move, transitioning from a circular arc line to a straight line, so that the thrust can be better transmitted to the distal piston of the push rod, avoiding deformation of the rectangular frame track in the middle of the reciprocating rod 36 caused by long-term use.

[0068] like Figure 8 and 9As shown, a cyclone mixer 4 is connected to the main slurry output pipe, which is a horizontally placed frustum-shaped cavity structure with both ends connected in the axial direction. The small end is the slurry outlet end, and a one-way valve 39 is provided on the pipeline at the outlet end; the large end is the slurry inlet end, which is connected to the slurry output pipe and the main component branch.

[0069] A swirl cone 41 is coaxially arranged in the swirl mixer 4. The swirl cone 41 is a cone with a smaller length and diameter than the swirl mixer 4. The tip of the swirl cone 41 faces the large end of the swirl mixer 4. In its section, a ring channel with a variable diameter is formed between the swirl mixer 4 and the swirl mixer 4. In the swirl mixer 4, and at the rear end of the swirl cone 41, there is a swirl mixing chamber 42. The swirl mixing chamber 42 is a chamber for fully mixing the main slurry and the trace component solution. After the slurry is fully mixed, it is injected into the surrounding rock as soon as possible to avoid the main slurry in the slurry storage tank 2 from reacting prematurely with the trace added components and blocking the pipeline. The surface of the cone is provided with raised spiral patterns. After the slurry flows through the swirl cone 41, a swirl is formed in the forward direction, so that the main slurry and the added trace component solution are fully mixed and reacted in the swirl mixing chamber 42.

[0070] When two micro-dosing constant-ratio feeders 3 are provided, they are located on either end of the drive shaft 34-3. Two slurry storage barrels 1 are positioned at one end, each connected to a corresponding micro-component inlet pipe from the piston cylinder 38 at the upper or lower end. Each slurry storage barrel 1 is a square plastic barrel. For example, the right end contains the first and second slurry storage barrels 33-1 and 33-2, connected to the first and second micro-piston cylinders 38-1 and 38-2, respectively. During the full circular motion of the push wheel 35-4, or the full movement of the reciprocating rod 36, continuous injection of micro-components is achieved, resulting in a more uniform final mixed slurry. The upper half of the slurry storage barrels 1 extends beyond the housing 31, with an opening and lid at the top. The first and second slurry storage barrels 33-1 and 33-2 are located on the right side and filled with the same solution to be added, forming the right-hand pipeline. The third and fourth slurry storage barrels 33-3 and 33-4 are located on the left side and filled with the same solution to be added, forming the left-hand pipeline.

[0071] The two micro-dosing devices 3 and reciprocating rods 36 symmetrically arranged on the left and right sides can work simultaneously to add the same or different micro-components, or the micro-dosing device 3 and reciprocating rod 36 on one side can be in operation while the other side is in neutral. The bilaterally symmetrical design is also more conducive to the stability of the center of gravity of the device.

[0072] The grouting method of the above-mentioned mixing grouting device with small-proportion components added and adjustable proportions is as follows:

[0073] Step 1: The main slurry is fed into the meter wheel chamber 34-2 through the main slurry inlet pipe and then forwardly fed into the small chamber opposite it. During the flow of the main grouting liquid, the meter wheel 34-1 is driven to rotate, and the transmission shaft 34-3 is driven to rotate. As the transmission shaft 34-3 rotates, the main grouting liquid is sequentially fed into each small chamber and continuously provides power for the rotation of the meter wheel 34-1. The grouting liquid then flows into the main slurry outlet pipe.

[0074] Step 2: The transmission shaft 34-3 rotates, driving the transmission disc 35-1 to rotate, and the pin shaft 35-3 drives the push wheel 35-4 to slide up and down in the rectangular frame, and pushes the rectangular frame to slide back and forth along the horizontal reciprocating rail 37, and the variable-section push rod pushes the front or rear piston to reciprocate toward or away from the end in the piston cylinder; when the piston moves away from the end, the trace components in the slurry storage barrel 33 enter the closed cylinder body through the trace component inlet pipe; when the piston moves toward the end, the trace components flow out from the trace component outlet pipe and merge into the main slurry output pipe; among them, the trace components in the front and rear piston cylinders flow out in sequence and flow into the main slurry output pipe;

[0075] Step 3: The grouting liquid and trace components flow into the cyclone mixer 4. The mixed slurry adheres to the cyclone cone 41 and flows through the annular channel with a variable diameter. After flowing through the cyclone cone 41, a cyclone is formed along the forward direction and enters the cyclone mixing chamber 42. The main slurry and the added trace component solution are fully mixed and reacted. After mixing, they flow out and are injected into the grouting hole.

[0076] In the actual working process, it is selected to add 4% liquid accelerating agent to the cement single liquid slurry with a water-cement ratio of 1:1. The amount of addition is determined through indoor tests, which shortens the setting time of the slurry to 10 minutes.

[0077] 1. Connecting devices:

[0078] Install the grouting machine 1 at the grouting site, mix the cement single-liquid slurry with a water-cement ratio of 1:1 and store it in the slurry storage tank 2, insert the slurry suction head of the grouting machine 1 into the slurry storage tank 2, extend the slurry outlet pipe to the vicinity of the grouting hole orifice, connect the main slurry input pipe of the micro-proportioning feeder 3, connect the slurry outlet to the cyclone mixer 4, and then connect to the orifice of the grouting hole.

[0079] 2. Set the addition ratio:

[0080] Fill the first slurry storage barrel 33-1 and the second slurry storage barrel 33-2 with liquid accelerating agent, fix the pin shaft 35-3 and the push wheel 35-4 of the right pipeline in the proportional hole 35-2 of the 4% gear; the pin shaft 35-3 and the push wheel 35-4 are not installed in the left pipeline, that is, the transmission disc 35-1 of the left pipeline rotates idly, and the reciprocating rod 36 does not reciprocate.

[0081] 3. Start grouting:

[0082] The grouting machine 1 is turned on and grouting begins. As the slurry flows in the main pipeline, the micro-ratio adder 3 passively adds a fixed proportion of liquid accelerating agent into the slurry. After being mixed by the cyclone mixer 4, it is immediately injected into the surrounding rock.

[0083] When the main slurry in the slurry storage tank 2 is consumed to a certain extent, the next batch of slurry is mixed and added at any time; when the liquid quick-setting agent in the slurry storage barrel 133-1 and the slurry storage barrel 233-2 is consumed to a certain extent, it can be added at any time, and the entire grouting process can be kept continuous.

[0084] 4. End of grouting in this hole:

[0085] When the total amount of grouting or the grouting pressure reaches the designed grouting end standard, the grouting work of this grouting hole can be stopped at any time. Since the solidification time of the main slurry cement single liquid slurry reaches more than 6 hours, the quick-setting agent in the micro-ratio adder 3 is isolated from the main slurry, so there is sufficient time to dismantle the pipeline and replace the related work of the next hole grouting.

Claims

1. A mixing grouting device with adjustable proportions and small additions of components, characterized in that: It includes a main slurry conveying device and a micro-ratio adding device (3), wherein: The main slurry conveying device comprises: a paddle wheel chamber (34-2) and a paddle wheel (34-1), wherein: The meter wheel chamber (34-2) is a horizontally arranged closed cylindrical shell, and the front and rear opposite sides of the side shell are respectively connected to the main slurry input pipe and the main slurry output pipe; The metering wheel (34-1) is a multi-blade cylindrical structure, which is coaxially arranged in the metering wheel chamber (34-2), and its outer contour line matches the inner contour line of the metering wheel chamber (34-2), dividing the metering wheel chamber (34-2) into multiple independent small chambers in a circumferential direction; a transmission shaft (34-3) is coaxially sleeved in the center of the metering wheel chamber (34-2) and the metering wheel (34-1); The main slurry input pipe is used to connect with the grouting machine (1) to transport the slurry directly into the small chamber, and the slurry drives the metering wheel (34-1) to rotate, thereby driving the transmission shaft (34-3) to rotate. During the rotation of the metering wheel (34-1), the slurry flows out of the small chamber to the main slurry output pipe in sequence; The micro-constituent ratio adder (3) is one or two and is connected to the left or right end of the transmission shaft (34-3). When there are two, one is at each end. The micro-constituent inlet pipe and the micro-constituent outlet pipe are connected. The micro-constituent outlet pipe is connected to the terminal side shell pipeline of the main slurry output pipe. The micro-constant ratio adder (3) moves with the rotation of the transmission shaft (34-3) to output the micro-components and mix them with the main slurry; and when the speed of the metering wheel (34-1) changes, the addition amount of the micro-components is changed, so that the ratio of the main slurry to the micro-components is kept constant during the grouting process; Each of the micro-ratio feeders (3) comprises a transmission disc (35-1), a pin (35-3) and a reciprocating rod (36); The transmission disc (35-1) is a circular disc, which is fixedly mounted on the left or right end of the transmission shaft (34-3) and rotates along with the rotation of the transmission shaft (34-3); The pin shaft (35-3) is a cylindrical shaft, one end of which is detachably connected to the transmission disc (35-1), and the other end of which is sleeved with a push wheel (35-4); The reciprocating rod (36) comprises a rectangular frame and a variable cross-section push rod, wherein: The rectangular frame is vertically arranged on the left or right outer side of the transmission disk (35-1) at the left or right end, and the two are parallel. The inner spacing of the two vertical sides of the rectangular frame is consistent with the diameter of the push wheel (35-4), and is used as a track for the push wheel (35-4) to slide up and down. Horizontal reciprocating rails (37) are arranged at the upper and lower ends of the rectangular frame. The upper and lower sides of the rectangular frame are located in the horizontal reciprocating rails (37) at the corresponding ends and can slide back and forth along the horizontal reciprocating rails (37). There are two variable cross-section push rods, which are in the same plane as the rectangular frame, spaced apart from each other and horizontally connected to the front and rear vertical sides of the rectangular frame; The distal end of each variable-section push rod is provided with a horizontal piston cylinder (38), and the distal end section of the piston cylinder (38) is a closed cylinder body, and the end of the closed cylinder body is provided with a trace component inlet pipe and a trace component outlet pipe, and the trace component outlet pipes on the two piston cylinders (38) are connected in parallel; the pistons in the two piston cylinders (38) are connected to the distal end of the variable-section push rod on their side; The push wheel (35-4) is used to: under the drive of the transmission disc (35-1), slide up and down along the rectangular frame, and push the rectangular frame to slide forward or backward, thereby sequentially pushing the piston cylinders (38) on the front and rear sides. During the circumferential movement of the transmission disc (35-1), the trace components are sequentially discharged from the trace component outlet pipes on the front and rear sides without interruption.

2. A mixing grouting device with a small proportion of components added and adjustable proportions as claimed in claim 1, characterized in that: A plurality of proportional holes (35-2) are provided on the outer side wall of the transmission disc (35-1), and the plurality of proportional holes (35-2) are arranged at equal intervals in the same radial direction; the plurality of proportional holes (35-2) are sequentially detachably connected to the pin shaft (35-3) for changing the radius of the circular motion trajectory of the pin shaft (35-3), changing the distance of the horizontal upward reciprocating motion of the variable-section push rod, and thus changing the outflow amount of the trace component.

3. A mixing grouting device with a small proportion of components added and adjustable proportions as claimed in claim 2, characterized in that: A cyclone mixer (4) is connected to the end of the main slurry output pipe. The cyclone mixer (4) is a horizontally placed truncated cone-shaped cavity structure, and the two ends are connected in the axial direction, wherein the small end is the slurry outlet end and the large end is the slurry inlet end.

4. A mixing grouting device with a small proportion of components added and adjustable proportions as claimed in claim 3, characterized in that: A swirl cone (41) is coaxially arranged in the swirl mixer (4). The swirl cone (41) is a cone with a length and a diameter smaller than that of the swirl mixer (4). The tip of the swirl cone (41) faces the large end of the swirl mixer (4). In the section where the swirl cone (41) is located, a circular channel with a variable diameter is formed between the swirl mixer (4). In the swirl mixer (4), at the rear end of the swirl cone (41) is a swirl mixing chamber (42). The swirl mixing chamber (42) is a chamber for fully mixing the main slurry and the trace component solution.

5. A mixing grouting device with a small proportion of components added and adjustable proportions as claimed in claim 4, characterized in that: The variable-section push rod located at the upper end of the rectangular frame is located at 1 / 4 of the length from the upper end to the lower end of the rectangular frame, and the variable-section push rod located at the lower end of the rectangular frame is located at 1 / 4 of the length from the lower end to the upper end of the rectangular frame.

6. A mixing grouting device with a small proportion of components added and adjustable proportions as claimed in claim 5, characterized in that: Each trace component inlet pipe is connected to a slurry storage barrel (33) respectively.

7. A mixing grouting device with a small proportion of components added and adjustable proportions as claimed in claim 6, characterized in that: A one-way valve (39) is provided on each of the trace component inlet pipe and the trace component outlet pipe.

8. A grouting method using a mixing grouting device with a small-proportion component added and adjustable in proportion according to any one of claims 1 to 7, characterized in that: The grouting method is as follows: Step 1: The main grouting liquid is input into the metering wheel chamber (34-2) through the main grouting liquid input pipe and is input into the small chamber facing the metering wheel in a positive direction. During the flow of the main grouting liquid, the metering wheel (34-1) is driven to rotate, and the transmission shaft (34-3) is driven to rotate. When the transmission shaft (34-3) rotates, the main grouting liquid is sequentially input into each small chamber and continuously provides power for the rotation of the metering wheel (34-1). The grouting liquid flows into the main grouting liquid output pipe. Step 2: The transmission shaft (34-3) rotates, driving the transmission disc (35-1) to rotate, and the pin shaft (35-3) drives the push wheel (35-4) to slide up and down in the rectangular frame, and pushes the rectangular frame to slide back and forth along the horizontal reciprocating rail (37), and the variable-section push rod pushes the front or rear piston to reciprocate toward or away from the end in the piston cylinder; when the piston moves away from the end, the trace components in the slurry storage barrel (33) enter the closed cylinder body through the trace component inlet pipe; when the piston moves toward the end, the trace components flow out from the trace component outlet pipe and merge into the main slurry output pipe; wherein, the trace components in the front and rear piston cylinders flow out in sequence and flow into the main slurry output pipe without interruption; Step 3: The grouting liquid and the trace components flow into the cyclone mixer (4), and the mixed slurry adheres to the cyclone cone (41), flows through the annular channel with a variable diameter, and after flowing through the cyclone cone (41), forms a cyclone in the forward direction and enters the cyclone mixing chamber (42). The main slurry and the added trace component solution are fully mixed and reacted, and then flow out after mixing.

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