Tunnel grouting quantity accurate controllable construction equipment and grouting method

Abstract

This invention discloses a construction equipment and grouting method for precise and controllable tunnel grouting volume, belonging to the field of grouting machine technology. It includes a grout mixing tank, a grout conveyor, and a grouting volume regulator. The lower end of the grout mixing tank is connected to the grout conveyor, and the outlet of the grout conveyor is connected to the grouting volume regulator via a feeding pipe. The outlet of the grouting volume regulator is connected to an outlet pipe. The grouting volume regulator contains a sliding seat, a floating block, and a first driving mechanism, all located above its inlet. The sliding seat is slidably connected inside the grouting volume regulator, and a limiting cavity is provided at the lower part of the sliding seat. The upper end of the floating block is a sliding limiting head slidably connected within the limiting cavity, and the lower part of the floating block is a floating plate. A contactor for linkage control with the grout conveyor is embedded on the bottom surface of the sliding seat. The contactor is located above the floating plate and can abut against the upward-moving floating plate. This invention addresses the technical problem of insufficient precision in grouting volume control commonly found in existing grouting equipment.

Description

Technical Field

[0001] This invention belongs to the field of grouting machine technology, specifically relating to a construction equipment and grouting method for tunnel grouting volume that allows for precise control. Background Technology

[0002] As a crucial component of underground transportation infrastructure, tunnel engineering's construction quality directly impacts the project's safety and durability. Grouting technology is a key auxiliary construction method during tunnel construction, widely used in areas such as surrounding rock reinforcement, advanced support, water plugging and seepage prevention, and backfilling of tunnel segments. The core of grouting operations lies in accurately injecting grout into predetermined strata or voids according to design parameters to achieve engineering objectives such as reinforcing surrounding rock, filling voids, controlling deformation, or stopping water seepage. Precise control of the grout volume is crucial for ensuring grouting effectiveness, avoiding resource waste, and preventing engineering accidents.

[0003] Currently, the grouting equipment commonly used in tunnel construction mainly consists of three parts: a grout preparation system, a conveying system, and a grouting system.

[0004] Slurry preparation systems typically use mixing tanks to mix cement, water, and admixtures in proportion to prepare a homogeneous slurry;

[0005] The conveying system uses grouting pumps to pressurize and deliver the grout to the grouting point;

[0006] The grouting system injects grout into the strata or structural voids through grouting pipes.

[0007] However, existing grouting equipment generally suffers from insufficient precision in controlling grouting volume and relies on manual experience, making it difficult to meet the increasingly demanding requirements of modern tunnel engineering for grouting quality.

[0008] Therefore, there is an urgent need to develop a construction equipment that can precisely control and flexibly adjust the target grouting volume in order to improve the quality and efficiency of tunnel grouting construction. Summary of the Invention

[0009] To overcome the above deficiencies, this invention provides a construction equipment and grouting method for tunnel grouting with precise and controllable grouting volume, which solves the technical problem that existing grouting equipment generally lacks precision in controlling grouting volume.

[0010] To achieve the above objectives, the present invention adopts the following technical solution:

[0011] A construction device for precisely controlling tunnel grouting volume, comprising:

[0012] Grout mixing tank, grout conveyor, and grout injection regulator;

[0013] The slurry mixing tank is equipped with a stirring shaft inside, and a discharge port is set at the lower end. A material conveying pipe is installed and connected to the inlet of the slurry conveyor. The discharge port of the slurry conveyor is connected to the inlet of the grouting volume regulator through a feeding pipe equipped with a one-way valve. The discharge port of the grouting volume regulator is connected to a discharge pipe, and a first control valve is set at the inlet of the discharge pipe.

[0014] The grouting volume regulator is equipped with a slide block located above its inlet, a floating block slidably connected in the vertical direction, and a first drive mechanism; the floating block is located at the lower end of the slide block; the first drive mechanism is used to control the slide block to move up and down inside the grouting volume regulator.

[0015] The slide block is slidably connected to the inside of the grouting volume regulator, and a limit cavity is provided on the side of the slide block facing the floating block;

[0016] The floating block extends into the limiting cavity and is slidably connected to a sliding limiting head. A floating plate is provided at the end of the floating block away from the slide block, and the middle part of the floating plate is connected to the sliding limiting head by a first vertical rod.

[0017] A contactor that is linked to the slurry conveyor is embedded on the bottom surface of the slide facing the floating block; when the floating plate comes into contact with the slide, the floating plate abuts and triggers the contactor, thereby controlling the slurry conveyor to stop running.

[0018] As a preferred technical solution of the present invention, the first driving mechanism includes a first driving motor installed on the upper end of the grouting volume regulator. The motor shaft of the first driving motor is coaxially connected to an adjusting screw. The lower part of the adjusting screw is located inside the grouting volume regulator and is threadedly connected to the slide block.

[0019] As a preferred technical solution of the present invention, the upper part of the slide is provided with an upwardly protruding protrusion, and the protrusion is provided with a threaded hole that is threadedly connected to the adjusting screw; the inner top of the grouting volume regulator is provided with a protrusion clearance hole, and the protrusion and the protrusion clearance hole are adapted to each other.

[0020] The lower end of the limiting cavity is provided with a conical hole that connects to the lower part of the slide block, and the float block is provided with a conical head that matches the conical hole. An upwardly extending contact head is installed on the non-conical head area of ​​the float block.

[0021] A contact head clearance hole is provided at the lower end of the slide facing the contact head, and the contactor is movably embedded in the contact head clearance hole.

[0022] As a preferred technical solution of the present invention, an air pressure regulating hole is provided on the slide block, the lower end of the air pressure regulating hole is connected to the contact head clearance hole, and the upper part of the air pressure regulating hole is connected to the internal space of the grouting volume regulator above the slide block.

[0023] Multiple vent holes are provided on the grouting volume regulator above the slide block, and the vent holes are located close to the inner top surface of the grouting volume regulator.

[0024] As a preferred technical solution of the present invention, the slurry conveyor is a screw conveyor, and a conveyor motor for controlling the slurry conveying is installed at one end of the slurry conveyor, and the conveyor motor is a hollow cup motor.

[0025] One end of the motor shaft of the conveyor motor is connected to the spiral blades inside the slurry conveyor; the other end of the motor shaft of the conveyor motor is connected to the first transmission mechanism; the first transmission mechanism is connected to the stirring shaft inside the slurry mixing tank through the first one-way bearing.

[0026] A second drive mechanism is installed on the slurry mixing tank, and the second drive mechanism is connected to the stirring shaft inside the slurry mixing tank through a second one-way bearing.

[0027] When the second drive mechanism is working, it drives the first one-way bearing to rotate idling via the stirring shaft.

[0028] When the conveyor motor is working, it drives the second one-way bearing to rotate idling via the stirring shaft.

[0029] As a preferred technical solution of the present invention, a central gear is coaxially mounted on the upper part of the stirring shaft, a first standard gear is provided at the output end of the first transmission mechanism, a second standard gear is provided at the output end of the second drive mechanism, and the two sides of the central gear mesh with the first standard gear and the second standard gear respectively.

[0030] As a preferred technical solution of the present invention, the first transmission mechanism includes a first gearbox, a second gearbox, a first helical gear, a second helical gear, and a first standard gear;

[0031] The second gearbox is installed on one side of the upper part of the slurry mixing tank, and the first gearbox is located below the second gearbox, parallel to it and on the same side of the outside of the slurry mixing tank.

[0032] The first helical gear, the second helical gear, and the first standard gear are all located inside the slurry mixing tank; the motor shaft of the conveyor motor is connected to the first gearbox by a first connecting rod mounted coaxially.

[0033] A second connecting rod is installed on the other side of the first gearbox. A pair of meshing helical gears are installed on the second connecting rod and the first connecting rod to form a transmission.

[0034] The second gearbox is connected to the first helical gear via a third connecting rod that passes through the slurry mixing tank; a fourth connecting rod is installed on the inner top surface of the slurry mixing tank, and a first one-way bearing is fixed on the fourth connecting rod; the second helical gear and the first standard gear are respectively connected to the two ends of the first one-way bearing, and the second helical gear meshes with the first helical gear.

[0035] A bearing seat is installed on one side of the slurry mixing tank, and the middle part of the second connecting rod is rotatably connected to the bearing seat.

[0036] The lower end of the slurry mixing tank is equipped with a frame, and the first gearbox, slurry conveyor and slurry volume regulator are all installed on the frame.

[0037] As a preferred technical solution of the present invention, the second driving mechanism includes a second driving motor and a second standard gear. The second driving motor is installed on the upper end of the slurry mixing tank. The motor shaft of the second driving motor is connected to a rotating shaft that extends through the interior of the slurry mixing tank. A second one-way bearing is fixed on the rotating shaft, and one end of the second one-way bearing is connected to the second standard gear.

[0038] As a preferred technical solution of the present invention, the slurry conveyor is provided with a fixed seat and a vertical adjustment frame is installed on the outside; an angle swing member is hinged on the vertical adjustment frame, and the output end is hinged to the fixed seat; the fixed seat is located on the surface of the slurry conveyor and is located close to the slurry volume regulator.

[0039] The output end of the conveyor motor is connected to the first connecting rod by a universal coupling; a support base is rotatably provided on the outer side of the slurry conveyor.

[0040] Both the material transfer pipe and the material feeding pipe are telescopic pipes.

[0041] A grouting method for a construction device with precise and controllable grouting volume in tunnels further includes the following steps:

[0042] Step 1: Before the equipment is put into operation, confirm the grouting volume based on the actual site conditions;

[0043] Step 2, then, according to the required grouting volume V1, the first drive motor shaft drives the slide to rotate to move downward, so that the floating block drops a height h at the grouting volume regulator, so that the volume of the lower cavity and the gap between the floating block and the slide are equal to V1.

[0044] Step 3: During grouting, the grout in the grout mixing tank is fed into the grout conveyor.

[0045] When high-speed stirring is performed, the electric shaft of the second drive motor drives the second one-way bearing to work through the fourth connecting rod, so that the second standard gear meshes with the center gear to rotate, thereby driving the stirring shaft to work;

[0046] When low-speed mixing and discharging are performed, the second drive motor does not work, but the conveyor works. One end of the electric shaft drives the spiral blades inside the slurry conveyor to rotate, feeding the material towards the slurry volume regulator; the other end passes through the first connecting rod, the first gearbox, the second connecting rod, the second gearbox, and the third connecting rod to the first helical gear meshing with the second helical gear, and through the first standard gear meshing with the transmission center gear, synchronously realizing the rotation of the mixing shaft;

[0047] The slurry conveyor delivers the slurry to the slurry volume regulator below the floating block until the slurry below the floating block causes the floating block to float up and press against the slide seat, so that the floating block abuts and triggers the contactor.

[0048] Then, the grout conveyor is stopped by the linkage control of the contactor; then the first control valve is opened, and the grout inside the grout volume regulator is transported out through the discharge pipe, so as to achieve precise control of the grout volume. This allows the construction equipment to accurately control and flexibly adjust the target grout volume, thereby improving the quality and efficiency of tunnel grouting construction.

[0049] The present invention has the following beneficial effects:

[0050] Before operation, the grouting volume is determined based on the actual site conditions. Then, the first drive mechanism drives the slide to slide up and down, so that when the floating block abuts against the slide, the internal space of the grouting volume regulator below the floating block can accommodate the set grouting volume, achieving flexible adjustment of the grouting volume. The grout mixing tank mixes the grout according to the actual situation. When grouting is required, the grout in the mixing tank is fed into the grout conveyor. The grout conveyor slowly conveys the grout to the grouting volume regulator below the floating block until the grout below the floating block drives the floating block to press against the slide, causing the floating block to abut and trigger the contactor. Then, the contactor's linkage control stops the grout conveyor. Then, the first control valve is opened, and the grout inside the grouting volume regulator is conveyed out through the discharge pipe, achieving precise control of the grouting volume. This allows the construction equipment to accurately control and flexibly adjust the target grouting volume, thereby improving the quality and efficiency of tunnel grouting construction. Attached Figure Description

[0051] Figure 1 This is a front view of a construction device for precisely controlling the amount of grout injected into a tunnel, as proposed in this invention.

[0052] Figure 2 This is a schematic diagram of the internal structure of the construction equipment proposed in this invention;

[0053] Figure 3 for Figure 2 Enlarged view of part A;

[0054] Figure 4 for Figure 2 Enlarged view of part B;

[0055] Figure 5 This is a schematic diagram of the structure of the floating block proposed in this invention;

[0056] Figure 6 This is a schematic diagram of the construction equipment of the present invention installed on the frame;

[0057] Figure 7 This is a schematic diagram of the construction equipment according to another embodiment of the present invention;

[0058] Figure 8 for Figure 7 A partial schematic diagram.

[0059] legend:

[0060] 1-Slurry mixing tank; 101-Agitator shaft; 2-Slurry conveyor; 201-Conveyor motor; 3-Slurry volume regulator; 4-First control valve; 5-Slide seat; 6-Float block; 601-Contact head; 7-Contactor; 8-First drive motor; 9-Adjusting screw; 10-First one-way bearing; 11-Second one-way bearing; 12-Center gear; 13-First standard gear; 14-Second standard gear; 15-First gearbox; 16-Second gearbox; 17-First helical gear; 18-Second helical gear; 19-Second drive motor;

[0061] 20-Feeding pipe; 21-Discharge pipe; 22-First connecting rod; 23-Second connecting rod; 24-Third connecting rod; 25-Fourth connecting rod; 26-Transfer pipe; 202-Fixed base; 203-Universal coupling;

[0062] 30 - Frame; 31 - Protrusion clearance hole; 32 - Vent hole;

[0063] 41-Vertical adjustment frame; 42-Angle swing component; 43-Support base;

[0064] 51-Limiting cavity; 52-Protrusion; 53-Contact head clearance hole; 54-Air pressure regulating hole;

[0065] 61-Sliding limit head; 62-Floating plate; 63-First vertical rod; 64-Conical head. Detailed Implementation

[0066] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0067] Example 1

[0068] like Figures 1-6 As shown, this embodiment provides a construction device for precise and controllable tunnel grouting volume, including a grout mixing tank 1, a grout conveyor 2, and a grouting volume regulator 3. The grout mixing tank 1 mixes the grout. The outlet at the lower end of the grout mixing tank 1 is connected to the inlet of the grout conveyor 2. The outlet of the grout conveyor 2 is connected to the inlet of the grouting volume regulator 3 through a feeding pipe 20 equipped with a one-way valve. The outlet of the grouting volume regulator 3 is connected to an outlet pipe 21. A first control valve 4 is provided at the inlet of the outlet pipe 21 to facilitate the conveying of the mixed grout in the grout mixing tank 1 to the grouting volume regulator 3 via the grout conveyor 2. The grouting volume is adjusted within the grouting volume regulator 3. Then, the first control valve 4 is opened, and the grout inside the grouting volume regulator 3 is conveyed out through the outlet pipe 21, thus achieving precise control of the grouting volume.

[0069] Specifically, the grouting volume regulator 3 is equipped with a slide block 5 located above its inlet, a floating block 6 slidably connected to the lower end of the slide block 5 in a vertical direction, and a first drive mechanism for controlling the slide block 5 to move up and down inside the grouting volume regulator 3. The slide block 5 is slidably connected inside the grouting volume regulator 3. By adjusting the position of the slide block 5, the space below the floating block 6 can be adjusted, thereby achieving flexible adjustment of the grout. The lower part of the slide block 5 is provided with a limiting cavity 51, and the upper end of the floating block 6 is a sliding limiting head 61 slidably connected to the limiting cavity 51, so that the floating block 6 can slide down in a natural state. When the grout below the floating block 6 gradually rises, it abuts against the floating block 6, causing the floating block 6 to slide upward and abut against the top of the inner wall of the limiting cavity 51 of the slide block 5, ultimately achieving precise control of the grout below the floating block 6. Figure 5 This is a schematic diagram of the floating block.

[0070] like Figure 3 As shown, the lower part of the floating block 6 is a floating plate 62 located below the slide block 5. The middle part of the floating plate 62 is connected to the sliding limit head 61 through the first vertical rod 63, which facilitates the floating block 6 to slide upward when the slurry below it rises. The bottom surface of the slide block 5 is embedded with a contactor 7 that is linked and controlled by the slurry conveyor 2. The contactor 7 is located above the floating plate 62 and can abut against the upward-moving floating plate 62. When the floating block 6 slides upward, as long as the floating block 6 presses against the slide block 5, it can abut against and trigger the contactor 7 through the floating plate 62. Then the contactor 7 feeds back a signal to the controller, and the controller sends a stop command to the slurry conveyor 2, thereby controlling the slurry conveyor 2 to stop running and realizing precise control of the slurry.

[0071] Before operation, the grouting volume is determined according to the actual site conditions. Then, the slide block 5 is driven to slide up and down through the first drive mechanism so that when the floating block 6 comes into contact with the slide block 5, the internal space of the grouting volume regulator 3 below the floating block 6 can accommodate the set grouting volume, thus realizing flexible adjustment of the grouting volume.

[0072] Based on the design process requirements, the required grouting volume is V1, and the actual maximum volume of the grouting volume regulator is V. max =A+B+V 残 A is Figure 1 The volume of the floating block in the grouting volume regulator is up to the first control valve; under normal circumstances, when not discharging, the first control valve 4 is normally closed. B is... Figure 1 The volume of the gap between the floating block and the slide. V 残 The volume of space between the slide block and the top of the grouting volume regulator;

[0073] Normally, before grouting, the gap between the floating plate 62 and the slide block is at its maximum. The first drive mechanism moves the slide block downward, causing A to decrease and V to... 残 The value increases, resulting in V1 = A - n + B, where n is the change in A. In tunnel operation, the grout V1 injected into the target area according to design parameters is a known parameter. A is the designed grout volume regulator cavity volume, a known parameter during design. B is the maximum gap volume, also a known value. Therefore, if a single grout volume n is to be completed, the controller needs to calculate n = A + B - V1; while h = n / s, where s is the cross-sectional area in A, also a known value; and h is the height of the slider's overall lifting and lowering on the adjusting screw before grouting.

[0074] The actual lifting height h is then converted into the number of rotations or angles of the adjusting screw by the first drive motor, and the controller then controls the first drive motor to precisely control the grouting volume.

[0075] The grout mixing tank 1 mixes the grout according to the actual situation. When grouting is required in this construction equipment, the grout in the grout mixing tank 1 is fed into the grout conveyor 2. The grout conveyor 2 slowly conveys the grout to the grout volume regulator 3 below the floating block 6 until the grout below the floating block 6 drives the floating block 6 to press against the sliding seat 5, so that the floating block 6 abuts and triggers the contactor 7. Then, the grout conveyor 2 stops running through the linkage control of the contactor 7. Then, the first control valve 4 is opened, and the grout inside the grout volume regulator 3 is conveyed out through the discharge pipe 21, so as to achieve precise control of the grout volume. This allows the construction equipment to accurately control and flexibly adjust the target grout volume, thereby improving the quality and efficiency of tunnel grouting construction.

[0076] It needs to be further explained that, such as Figure 3As shown, in order to achieve the up-and-down adjustment of the slide block 5, the first drive mechanism includes a first drive motor 8 installed on the upper end of the grouting volume regulator 3. The motor shaft of the first drive motor 8 is coaxially connected to an adjusting screw 9. The lower part of the adjusting screw 9 is located inside the grouting volume regulator 3 and is threadedly connected to the slide block 5. When the first drive motor 8 is running, it can drive the adjusting screw 9 to rotate. Through the threaded transmission, the slide block 5 can be driven to move up and down along the inner wall of the grouting volume regulator 3, thereby adjusting the size of the space below the floating block 6 and realizing the adjustment of different set grouting volumes. This structure is simple and the transmission is stable. It can accurately control the movement position of the slide block and ensure the accuracy of grouting volume adjustment.

[0077] The upper part of the slide block 5 is provided with an upwardly protruding protrusion 52, such as... Figure 2 As shown, the protrusion 52 has a threaded hole inside that is threaded to the adjusting screw 9; the lower end of the adjusting screw 9 extends into the threaded hole to complete the transmission engagement. The protrusion 52 is an extension, which can reduce the overall weight of the slide 5 and lengthen the threaded hole, so that the adjusting screw 9 and the slide 5 can have a longer threaded engagement structure, thereby satisfying the slide 5 to slide a larger range of vertical sliding distance within the grouting volume adjuster 3, and realizing a wider range of grouting volume adjustment.

[0078] The top of the grouting volume regulator 3 is provided with a protrusion clearance hole 31. As the slide 5 moves upward, the protrusion 52 can be matched and inserted into the protrusion clearance hole 31. This structural design can maximize the use of the internal space of the grouting volume regulator without changing the overall outer diameter of the grouting volume regulator, allowing the slide to have a larger upward stroke and further expanding the adjustment range of the grouting volume.

[0079] like Figure 3 At least two sets of sealing rings are embedded on the outer side of the slide block 5. The sealing rings fit tightly against the inner wall of the grouting volume regulator 3, which can separate the space on the upper and lower sides of the slide block, prevent cement grout from leaking from the top of the slide block, ensure the sealing of the grouting volume regulating cavity, and avoid pressure leakage from affecting the grouting accuracy.

[0080] It should be further explained that the lower end of the limiting cavity 51 is provided with a conical hole that connects to the lower part of the slide block 5, and the upper part of the float block 6 is provided with a conical head 64 that can be matched and inserted into the conical hole. When the float block 6 moves upward under the action of the slurry below it, the conical head 64 first enters the conical hole. Through this structural design, it plays a guiding role, which can make the float block 6 more accurately cooperate with the slide block 5 when it moves upward, thereby enabling the float block 6 to accurately trigger the contactor 7.

[0081] Furthermore, the floating blocks 6 around the conical head 64 are provided with upwardly extending contact heads 601. The lower end of the slide block 5 above the contact head 601 is provided with a contact head clearance hole 53 that allows the contact head 601 to be matched and inserted into it. The contactor 7 is embedded in the contact head clearance hole 53. When the floating block rises with the grout level to the set position, the contact head 601 is precisely inserted into the contact head clearance hole 53 and triggers the embedded contactor 7. After triggering, the signal is transmitted to the control unit to cut off the grouting path and stop grouting in time. This can accurately control the amount of grout injected in a single injection, avoid excessive grouting that would cause material waste or structural deformation, and further improve the control accuracy of the amount of grout injected during tunnel grouting construction.

[0082] An air pressure regulating hole 54 is provided on the slide block 5. The lower end of the air pressure regulating hole 54 is connected to the contact head clearance hole 53, and the upper part of the air pressure regulating hole 54 is connected to the internal space of the grouting volume regulator 3 above the slide block 5. The grouting volume regulator 3 above the slide block 5 is provided with multiple vent holes 32. The vent holes 32 are set close to the inner top surface of the grouting volume regulator 3. Through the cooperation of the air pressure regulating hole 54 and the vent holes 32, when the contact head 601 is inserted upward into the contact head clearance hole 53, the original air in the contact head clearance hole 53 will be discharged into the internal space of the grouting volume regulator 3 along the air pressure regulating hole 54, and finally discharged out of the equipment through the vent holes 32. This can avoid the situation where the air pressure in the contact head clearance hole 53 rises and hinders the contact head from reaching the correct position when the contact head is inserted, ensuring that the contact head can rise smoothly to trigger the contactor, further improving the reliability and accuracy of the triggering action, and avoiding triggering delay caused by air pressure resistance, which would cause grouting volume control error.

[0083] It should be noted that, in practice, the contactor's signal line can be connected to the outside through the vent 32, eliminating the need for additional wiring slots. This simplifies the manufacturing process of the slide and the grout volume regulator. Furthermore, the vent 32's location near the inner top surface does not affect the stability of the signal line routing. The ventilation characteristics of the vent 32 also help to remove the small amount of heat generated by the signal line during operation, further optimizing the internal wiring layout and operational stability. The portion of the signal line outside the grout volume regulator 3 is preferably an elastic structure, capable of adapting to the extension and displacement of the signal line caused by the sliding motion of the slide. This prevents long-term pulling from causing the signal line connectors to loosen or the line to break, further improving the equipment's durability. The vent 32 simultaneously achieves the triple functions of venting, wiring, and heat dissipation, maximizing the simplification of the equipment structure, reducing manufacturing difficulty, and further improving the overall operational stability of the equipment. This makes it suitable for the precise control of grout volume under the complex conditions of tunnel construction.

[0084] like Figure 2As shown, the slurry conveyor 2 is a screw conveyor. One end of the slurry conveyor 2 is equipped with a conveyor motor 201 that controls the slurry conveying. The conveyor motor 201 is a hollow cup motor. One end of the motor shaft of the hollow cup motor is connected to the screw blades 202 inside the slurry conveyor 2 to realize the conveying of slurry. The other end of the motor shaft of the hollow cup motor is connected to a first transmission mechanism. The first transmission mechanism is connected to the stirring shaft 101 inside the slurry mixing tank 1 through a first one-way bearing 10. A second drive mechanism is installed on the slurry mixing tank 1. The second drive mechanism is connected to the stirring shaft 101 inside the slurry mixing tank 1 through a second one-way bearing 11.

[0085] Only the stirring shaft 101 is working: when the second drive mechanism is working, the stirring shaft 101 drives the first one-way bearing 10 to rotate idling.

[0086] The stirring shaft 101 stirs and the spiral blades 202 work: When the conveyor motor 201 is working, the stirring shaft 101 drives the second one-way bearing 11 to rotate idling, so that the slurry can be stirred at the same time as feeding.

[0087] With the above structural configuration, the conveyor motor 201 can simultaneously drive the spiral blades 202 of the slurry conveyor to rotate and deliver slurry, and the stirring shaft inside the slurry mixing tank can rotate at low speed to stir. This ensures synchronous stirring during the grouting process to prevent slurry settling. When it is necessary to separately stir the slurry inside the slurry mixing tank at high power and high speed, the second drive mechanism can be activated to drive the stirring shaft to rotate independently. At this time, the conveyor motor 201 will not be driven to rotate, so the stirring and slurry delivery do not interfere with each other. At the same time, the conveyor motor 201 adopts a hollow cup motor, which has higher control precision and can accurately control the number of rotations, thereby accurately controlling the slurry volume per unit time, further improving the controllability of the equipment for the slurry volume.

[0088] like Figure 4As shown, a central gear 12 is coaxially mounted on the upper part of the stirring shaft 101. A first standard gear 13 is provided at the output end of the first transmission mechanism, causing the first standard gear 13 to rotate under the drive of the conveyor motor 201. A second standard gear 14 is provided at the output end of the second drive mechanism. The two sides of the central gear 12 mesh with the first standard gear 13 and the second standard gear 14, respectively. In practice, when the first standard gear 13 rotates under the drive of the conveyor motor 201, it drives the central gear 12 to rotate through meshing transmission, thereby driving the stirring shaft 101 to rotate at a low speed. At this time, the second one-way bearing 11 is in an idle state and will not have a transmission effect on the second standard gear 14 at the output end of the second drive mechanism. When high-speed stirring is required, the second drive mechanism starts and drives the second standard gear 14 to rotate. The meshing transmission drives the central gear 12 and the stirring shaft 101 to rotate at high speed. At this time, the first one-way bearing 10 rotates idle, and the first transmission mechanism and the conveyor motor 201 will not rotate with it, further ensuring the stability of the two drive systems working independently and reducing power loss during equipment operation.

[0089] It should be further explained that the first transmission mechanism includes a first gearbox 15, a second gearbox 16, a first helical gear 17, a second helical gear 18, and a first standard gear 13. The second gearbox 16 is installed on one side of the upper part of the slurry mixing tank 1, and the first gearbox 15 is located below the second gearbox 16. The first helical gear 17, the second helical gear 18, and the first standard gear 13 are all located inside the slurry mixing tank 1. The other end of the motor shaft of the hollow cup motor is connected to the first gearbox 15 via a first connecting rod 22, and the first gearbox 15 is connected to the second gearbox 16 via a second connecting rod 23. The gearbox 16 is a transmission connection that allows the hollow cup motor to effectively transmit force to the second gearbox 16. The second gearbox 16 is connected to the first helical gear 17 via a third connecting rod 24 that passes through the slurry mixing tank 1. The middle part of the third connecting rod 24 is rotatably connected to the slurry mixing tank 1 via a ball bearing. A fourth connecting rod 25 is installed on the inner top surface of the slurry mixing tank 1. A first one-way bearing 10 is fixed to the fourth connecting rod 25. The second helical gear 18 and the first standard gear 13 are respectively connected to the two ends of the first one-way bearing 10, and the second helical gear 18 meshes with the first helical gear 17. When the first helical gear 17 rotates, it can drive the second helical gear 18 to rotate synchronously through the meshing action. The rotation of the second helical gear 18 can drive the first standard gear 13 to rotate synchronously through the first one-way bearing 10. The first one-way bearing 10 ensures that the power is transmitted only in the output direction, avoiding reverse power backflow that could affect the accuracy of slurry volume control. When the hollow cup motor outputs power in the forward direction, the first standard gear 13 rotates freely along with the first one-way bearing 10, thereby achieving precise control over the rotation direction and power output. In conjunction with the gearbox, it can stably drive the rotation of the subsequent stirring shaft, thus ensuring the quality of the slurry during use.

[0090] like Figure 6 As shown, to ensure a stable overall connection, a frame is installed at the lower end of the slurry mixing tank 1. The first gearbox 15, slurry conveyor 2, and slurry volume regulator 3 are all mounted on the frame 30. The frame 30 provides stable support for each functional component while raising the installation height of the slurry mixing tank, leaving sufficient operating space for bottom discharge and conveying pipeline layout, and facilitating daily maintenance by personnel. Furthermore, a feed inlet is provided at the top of the slurry mixing tank 1, with a sealed end cap. Opening the end cap allows the raw materials for preparing the slurry to be added into the slurry mixing tank. The sealed structure prevents slurry from splashing out during mixing and also prevents debris from falling into the tank and affecting the slurry quality.

[0091] Furthermore, a bearing seat is installed on one side of the slurry mixing tank 1, and the middle part of the second connecting rod 23 is rotatably connected to the bearing seat. The bearing seat is fixedly welded to the outer tank wall of the slurry mixing tank, which can provide stable radial support for the rotation process of the second connecting rod 23, avoid the second connecting rod 23 from swinging significantly during the rotation with the power component, ensure the stability of power transmission, reduce the vibration and abnormal noise generated during the rotation, and extend the overall service life of the equipment.

[0092] It should be further explained that the second drive mechanism includes a second drive motor 19 and a second standard gear 14. The second drive motor 19 is installed on the upper end of the slurry mixing tank 1 to ensure its stability and facilitate electrical connection and maintenance. The motor shaft of the second drive motor 19 is connected to a rotating shaft that extends into the interior of the slurry mixing tank 1. Preferably, the middle part of the rotating shaft is rotatably connected to the slurry mixing tank 1 through a ball bearing to ensure the stability of the rotating shaft during rotation. A second one-way bearing 11 is fixed on the rotating shaft, and one end of the second one-way bearing 11 is connected to the second standard gear 14 so that the rotation of the rotating shaft can be controlled by the second drive motor 19. The rotating shaft drives the second standard gear 14 to rotate through the second one-way bearing 11, and the second standard gear 14 drives the central gear 12 to rotate at high speed. When the conveyor motor 201 drives the central gear 12 to rotate, the second standard gear 14 can idle relative to the rotating shaft to avoid affecting the second drive motor 19 and achieve stable operation of the structure.

[0093] Example 2

[0094] like Figure 7 and 8As shown, another embodiment of the present invention is provided. Based on embodiment 1, in order to fully discharge the slurry from the slurry conveyor, one side of the slurry conveyor is eccentrically constrained on the support base. The rotatable connection allows the slurry conveyor to tilt toward the end of the slurry volume regulator 3. When tilted downward, the slurry can be fully discharged with the spiral blades and combined with the weight of the slurry itself, so as to fully discharge the slurry and avoid the inability to accurately control the slurry volume.

[0095] A fixed base 202 is provided on the slurry conveyor 2 at a non-central position, and a vertical adjustment frame 41 is installed on the outside. An angle swing member 42 is hinged on the vertical adjustment frame 41, and the output end is hinged to the fixed base 202. The fixed base 202 is located on the surface of the slurry conveyor 2 and is located close to the slurry volume regulator 3. The output end of the conveyor motor 201 is connected to the first connecting rod 22 by a universal coupling 203. In this way, even if the left end of the conveyor motor 201 is tilted with the slurry conveyor 2, it can still swing at an angle through the universal coupling, but can still transmit rotational power to make the first connecting rod rotate.

[0096] When the output end of the angular swing component pushes the fixed seat, the slurry conveyor 2 tilts, allowing for full material discharge. The angular swing component can be a hinged pneumatic cylinder, hydraulic cylinder, or electric cylinder, with a connecting ear at one end of the cylinder body that is rotatably connected to the vertical adjustment frame, thereby preventing the slurry conveyor from getting stuck at an angle.

[0097] A support base 43 is rotatably mounted on the outer side of the slurry conveyor 2. A bottom plate is also installed on the frame. The bottom plate can be arranged in an arc shape to prevent breakage or collision damage to the slurry conveyor at the connection between the fixed base and the angular swing component. Figure 8 As shown, both the material transfer pipe 26 and the feeding pipe 20 are telescopic pipes, which prevents excessive compression and pipe rupture when the slurry conveyor is tilted.

[0098] This invention, by setting a grout conveyor that can tilt downwards toward the grout volume regulator, allows the grout to be fully stirred by the spiral blades and released from the grout conveyor, preventing it from remaining inside the grout conveyor and enabling precise control of the subsequent grout volume.

[0099] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A construction device for precisely controlling the amount of grout injected into a tunnel, characterized in that, include: Slurry mixing tank (1), slurry conveyor (2) and grouting volume regulator (3). The mixing tank (1) is equipped with a mixing shaft (101) and a discharge port at the lower end. A material transfer pipe (26) is installed and connected to the inlet of the slurry conveyor (2). The discharge port of the slurry conveyor (2) is connected to the inlet of the grouting regulator (3) through a feeding pipe (20) equipped with a one-way valve. The discharge port of the grouting regulator (3) is connected to a discharge pipe (21). A first control valve (4) is installed at the inlet of the discharge pipe (21). The grouting volume regulator (3) is provided with a slide (5) located above its inlet, a floating block (6) slidably connected in the vertical direction, and a first drive mechanism; the floating block (6) is located at the lower end of the slide (5); the first drive mechanism is used to control the slide (5) to move up and down inside the grouting volume regulator (3); The slide (5) is slidably connected to the inside of the grouting volume regulator (3), and a limiting cavity (51) is provided on the side of the slide (5) facing the floating block (6). The floating block (6) extends into the limiting cavity (51) and is slidably connected to the sliding limiting head (61). A floating plate (62) is provided at the end of the floating block (6) away from the slide (5). The middle part of the floating plate (62) is connected to the sliding limiting head (61) by a first vertical rod (63). A contactor (7) is embedded on the bottom surface of the slide (5) facing the floating block (6) and is linked to the slurry conveyor (2) for control. When the floating plate (62) abuts against the slide (5), the floating plate (62) abuts against and triggers the contactor (7), thereby controlling the slurry conveyor (2) to stop running.

2. The construction equipment for precisely controlling tunnel grouting volume according to claim 1, characterized in that, The first drive mechanism includes a first drive motor (8) installed on the upper end of the grouting volume regulator (3). The motor shaft of the first drive motor (8) is coaxially connected to an adjusting screw (9). The lower part of the adjusting screw (9) is located inside the grouting volume regulator (3) and is threadedly connected to the slide (5).

3. The construction equipment for precisely controlling tunnel grouting volume according to claim 2, characterized in that, The upper part of the slide block (5) is provided with an upward protrusion (52), and the inside of the protrusion (52) is provided with a threaded hole that is threadedly connected to the adjusting screw (9); the inner top of the grouting volume regulator (3) is provided with a protrusion clearance hole (31), and the protrusion (52) is adapted to the protrusion clearance hole (31). The lower end of the limiting cavity (51) is provided with a conical hole that connects to the lower part of the slide block (5), and a conical head (64) matching the conical hole is provided on the float block (6). An upwardly extending contact head (601) is installed on the non-conical head (64) area of ​​the float block (6). A contact head clearance hole (53) is provided at the lower end of the slide (5) facing the contact head (601) to match and plug into the contact head (601), and the contactor (7) is movably embedded in the contact head clearance hole (53).

4. The construction equipment for precisely controlling tunnel grouting volume according to claim 3, characterized in that, An air pressure regulating hole (54) is provided on the slide (5). The lower end of the air pressure regulating hole (54) is connected to the contact head clearance hole (53), and the upper part of the air pressure regulating hole (54) is connected to the internal space of the grouting volume regulator (3) above the slide (5). Multiple vent holes (32) are provided on the grouting volume regulator (3) above the slide block (5), and the vent holes (32) are located close to the inner top surface of the grouting volume regulator (3).

5. The construction equipment for precisely controlling tunnel grouting volume according to claim 1, characterized in that, The slurry conveyor (2) is a screw conveyor, and a conveyor motor (201) for controlling the slurry conveying is installed at one end of the slurry conveyor (2), and the conveyor motor (201) is a hollow cup motor. One end of the motor shaft of the conveyor motor (201) is connected to the spiral blades inside the slurry conveyor (2); the other end of the motor shaft of the conveyor motor (201) is connected to the first transmission mechanism; the first transmission mechanism is connected to the stirring shaft (101) inside the slurry mixing tank (1) through the first one-way bearing (10). A second drive mechanism is installed on the slurry mixing tank (1), and the second drive mechanism is connected to the stirring shaft (101) inside the slurry mixing tank (1) through a second one-way bearing (11); When the second drive mechanism is working, it drives the first one-way bearing (10) to rotate idling through the stirring shaft (101); When the conveyor motor (201) is working, it drives the second one-way bearing (11) to rotate idling through the stirring shaft (101).

6. The construction equipment for precisely controlling tunnel grouting volume according to claim 5, characterized in that, A central gear (12) is coaxially mounted on the upper part of the stirring shaft (101). A first standard gear (13) is provided at the output end of the first transmission mechanism, and a second standard gear (14) is provided at the output end of the second drive mechanism. The two sides of the central gear (12) mesh with the first standard gear (13) and the second standard gear (14) respectively.

7. The construction equipment for precisely controlling tunnel grouting volume according to claim 6, characterized in that, The first transmission mechanism includes a first gearbox (15), a second gearbox (16), a first helical gear (17), a second helical gear (18), and a first standard gear (13); The second gearbox (16) is installed on one side of the upper part of the slurry mixing tank (1), and the first gearbox (15) is located below the second gearbox (16), and is parallel to it and located on the same side of the outside of the slurry mixing tank (1). The first helical gear (17), the second helical gear (18), and the first standard gear (13) are all located inside the slurry mixing tank (1); the motor shaft of the conveyor motor (201) is connected to the first gearbox (15) by coaxially mounting the first connecting rod (22); A second connecting rod (23) is installed on the other side of the first gearbox (15). A pair of meshing helical gears are installed on the second connecting rod (23) and the first connecting rod (22) to form a transmission. The second gearbox (16) is connected to the first helical gear (17) via a third connecting rod (24) that passes through the slurry mixing tank (1); a fourth connecting rod (25) is installed on the inner top surface of the slurry mixing tank (1), and a first one-way bearing (10) is fixed on the fourth connecting rod (25); the second helical gear (18) and the first standard gear (13) are respectively connected to the two ends of the first one-way bearing (10), and the second helical gear (18) meshes with the first helical gear (17); A bearing seat is installed on one side of the slurry mixing tank (1), and the middle part of the second connecting rod (23) is rotatably connected to the bearing seat; The lower end of the slurry mixing tank (2) is equipped with a frame (30), and the first gearbox (15), slurry conveyor (2) and slurry volume regulator (3) are all installed on the frame (30).

8. The construction equipment for precisely controlling tunnel grouting volume according to claim 7, characterized in that, The second drive mechanism includes a second drive motor (19) and a second standard gear (14). The second drive motor (19) is installed on the upper end of the slurry mixing tank (1). The motor shaft of the second drive motor (19) is connected to a rotating shaft that extends through the slurry mixing tank (1) to the bottom. A second one-way bearing (11) is fixed on the rotating shaft. One end of the second one-way bearing (11) is connected to the second standard gear (14).

9. The construction equipment for precisely controlling tunnel grouting volume according to claim 8, characterized in that, The slurry conveyor (2) is provided with a fixed seat (202) and a vertical adjustment frame (41) is installed on the outside; an angle swing member (42) is hinged on the vertical adjustment frame (41) and the output end is hinged to the fixed seat (202); the fixed seat (202) is located on the surface of the slurry conveyor (2) and is set close to the slurry volume regulator (3); The output end of the conveyor motor (201) is connected to the first connecting rod (22) by a universal coupling (203); a support seat (43) is rotatably provided on the outside of the slurry conveyor (2). Both the material transfer pipe (26) and the material feeding pipe (20) are telescopic pipes.

10. A grouting method for a construction equipment with precise and controllable grouting volume in tunnels, characterized in that, The construction equipment for precisely controlling the tunnel grouting volume as described in claim 8 further includes the following steps: Step 1: Before the equipment is put into operation, confirm the grouting volume based on the actual site conditions; Step 2, then, according to the required grouting volume V1, the first drive motor (8) drives the slide (5) to rotate to move downward, so that the floating block (6) drops a height h at the grouting volume regulator (3), so that the volume of the lower cavity and the gap between the floating block (6) and the slide (5) are equal to V1. Step 3: When grouting, the grout in the grout mixing tank (1) is fed into the grout conveyor (2); When high-speed stirring is performed, the electric shaft of the second drive motor (19) drives the second one-way bearing (11) to work through the fourth connecting rod (25), so that the second standard gear (14) meshes with the center gear (12) to rotate, thereby driving the stirring shaft (101) to work. When low-speed mixing and discharging are performed, the second drive motor (19) does not work, the conveyor (201) works, one end of the electric shaft drives the spiral blades inside the slurry conveyor (2) to rotate, and feeds the material toward the slurry volume regulator (3); the other end passes through the first connecting rod (22), the first gearbox (15), the second connecting rod (23), the second gearbox (16), the third connecting rod (24) to the first helical gear (17) to mesh with the second helical gear (18), and through the first standard gear (13) to mesh with the transmission center gear (12), so as to realize the rotation of the mixing shaft (101) synchronously; The slurry conveyor (2) delivers the slurry to the slurry volume regulator (3) below the floating block (6) until the slurry below the floating block (6) causes the floating block (6) to float up and press against the slide (5), so that the floating block (6) abuts against and triggers the contactor (7). Then, the grout conveyor (2) is stopped by the linkage control of the contactor (7); then the first control valve (4) is opened, and the grout inside the grout volume regulator (3) is transported out through the discharge pipe (21) to achieve precise control of the grout volume, so that the construction equipment can accurately control and flexibly adjust the target grout volume to improve the quality and efficiency of tunnel grouting construction.

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