Cement slurry feeding device for tunnel reinforcement construction

Abstract

The present application relates to the technical field of tunnel reinforcement, in particular to a cement slurry feeding device for tunnel reinforcement construction, which comprises a base and a tank body; the tank body is divided into a slurry preparation bin and a slurry storage bin by a partition plate; the slurry preparation bin is further connected with a powder pipe and a liquid inlet pipe at the top; a powder bin is integrally formed in the middle of the powder pipe; a weighing sensor and an electromagnetic switch valve are sequentially installed at the lower part of the powder bin; a metering pump is arranged on the liquid inlet pipe; a high-speed stirring structure is further arranged in the slurry preparation bin; the high-speed stirring structure comprises a rotating shaft, a stirring rod, a shearing net and a high-speed motor; a low-speed mixing structure is further arranged in the slurry storage bin; a grouting pipe is further connected to one side of the slurry storage bin; a metering pump is further arranged at the input end of the grouting pipe; and a pressure regulating valve is further arranged on the grouting pipe; the present application is configured with a high-speed vortex slurry preparation bin and a low-speed anti-settling slurry storage bin, which improves the quality of slurry preparation, and the slurry ratio and grouting pressure are accurately controllable, thereby improving the operation efficiency of tunnel reinforcement construction grouting.

Description

Technical Field

[0001] This invention relates to the field of tunnel reinforcement technology, and specifically to a cement slurry supply device for tunnel reinforcement construction. Background Technology

[0002] Tunnel lining reinforcement, surrounding rock consolidation, and backfill grouting behind the lining are all completed using cement grouting equipment. The grout density, grout mix ratio, and pressure-flow stability directly determine the quality of tunnel reinforcement. Currently, domestic tunnel reinforcement grouting equipment is divided into three main categories: split-type simple grouting machines, integrated mobile grouting stations, and intelligent anchoring trolleys, which are widely used in the repair of damaged tunnels in highways, subways, and railways.

[0003] Existing cement grouting equipment suffers from the following technical problems: 1. Low mixing accuracy: Old-style split equipment lacks a metering screw, requiring manual addition of water and cement based on experience, resulting in large fluctuations in the water-cement ratio. Too thin a grout results in insufficient strength, while too thick a grout easily clogs pipes, leading to voids and stratification during grouting on the back of the lining plate. 2. Grout sedimentation and stratification: Single-stage mixing without a low-speed storage and mixing chamber causes rapid sedimentation of the cement grout, resulting in uneven pipe delivery and poor compaction of the arch filling. 3. Lack of automatic cleaning mechanisms in the pipelines: Cement hardens and clogs pipes after shutdown; numerous bends and unreasonable pipe diameters lead to uneven grout flow rates and sludge accumulation, requiring time-consuming and labor-intensive cleaning. Summary of the Invention

[0004] In order to overcome the shortcomings and deficiencies of the existing technology for gypsum powder screening, the present invention provides a cement slurry supply device for tunnel reinforcement construction.

[0005] The present invention achieves the above objectives by adopting the following technical solution: A cement slurry supply device for tunnel reinforcement construction includes a base and a tank. The base is horizontally distributed, and the tank is vertically arranged on the base. The tank is divided into a slurry preparation chamber and a slurry storage chamber by a partition. Vertically distributed inlet pipes are arranged on the partition, and butterfly valves are installed on the inlet pipes. A powder pipe and an inlet pipe are connected to the top of the slurry preparation chamber. An integrally formed powder silo is arranged in the middle of the powder pipe. The powder silo is also equipped with a screw conveyor structure by a support frame. A weighing sensor and an electromagnetic valve are installed in sequence at the bottom of the powder silo. A metering pump is installed on each inlet pipe. The pulping tank is also equipped with a high-speed stirring structure, which includes a rotating shaft, stirring rods, a shearing mesh, and a high-speed motor. The rotating shaft is vertically arranged in the pulping tank, and the high-speed motor is mounted on the top of the tank via a bracket and connected to the rotating shaft. The stirring rods are arranged on the rotating shaft and are multiple rods evenly distributed in a ring. The shearing mesh includes a mesh frame and a filter screen arranged within the mesh frame. The mesh frame is connected to the rotating shaft via a connecting arm. The slurry storage tank is also equipped with a low-speed mixing structure. A grouting pipe is connected to one side of the slurry storage tank, and a metering pump is installed at the input end of the grouting pipe. A pressure regulating valve is also installed on the grouting pipe.

[0006] As a preferred technical solution: a movable structure is also provided below the base, the movable structure including movable wheels and support legs, the movable wheels being mounted on the base via brackets, and the support legs being retractable.

[0007] As a preferred technical solution: the support leg includes a hydraulic lifting rod and a support foot. The hydraulic lifting rod is vertically distributed on the base, and the support foot is located at the bottom end of the hydraulic lifting rod. The front of the base is also provided with a control switch, and the lower end of the base is also provided with a horizontal detection sensor. The horizontal detection sensor is connected to the control switch.

[0008] As a preferred technical solution: the support frame includes an inner ring, an outer ring, and a connecting rod; the outer ring and the inner ring form an integral structure through the connecting rod, and the outer ring is connected and fixed to the inner wall of the powder silo.

[0009] As a preferred technical solution: the spiral conveying structure includes a central shaft, spiral blades and a conveying motor; the central shaft is vertically distributed between the upper and lower inner rings, the spiral blades are disposed on the central shaft, and the conveying motor is connected to the central shaft.

[0010] As a preferred technical solution: the stirring rod consists of three layers distributed vertically; the mesh size of the filter screen is 5-10 mesh.

[0011] As a preferred technical solution: the low-speed mixing structure includes a rotating shaft, a low-speed motor, blades, a connecting sleeve, and a tilting plate; the rotating shaft is vertically installed in the slurry storage bin, the low-speed motor is located at the bottom of the tank and connected to the rotating shaft; the connecting sleeve is installed on the rotating shaft and the two are threadedly connected, the blades are located on the upper part of the connecting sleeve, the tilting plate is located on the lower part of the connecting sleeve, and the tilting plate is also provided with multiple evenly distributed through holes.

[0012] As a preferred technical solution: scrapers are provided at the outer ends of the stirring rod, shearing mesh, and paddle, and the scrapers are kept in contact with the inner wall of the tank.

[0013] As a preferred technical solution, an industrial control computer is also installed on the outside of the tank via a bracket.

[0014] The advantages of this invention compared to the prior art are as follows: The feeding equipment is equipped with a high-speed eddy current slurry mixing chamber and a low-speed anti-settling slurry storage chamber. The spiral powder conveyor is equipped with a weighing sensor, and the water and cement admixtures are automatically proportioned with the water-cement ratio error controlled within ±1.5%. The slurry storage chamber continuously stirs at low speed to prevent cement sedimentation and stratification, ensuring that the slurry is uniformly delivered to the cavity of the inner lining plate. The slurry proportion and grouting pressure are precisely controllable, the slurry quality is greatly improved, the void rate on the back of the inner lining plate is reduced from the original 8% to less than 1%, the density of cement slurry filling is significantly improved, and the durability of tunnel lining reinforcement is greatly improved.

[0015] The inner wall of the feeding equipment is polished to reduce drag and minimize slurry adhesion. At the same time, scrapers are installed to remove stubborn stains and clumps. After construction is completed, the pump body, pipelines and mixing chamber are automatically cleaned with clean water circulation, eliminating the need for manual disassembly. The entire process requires no manual operation, greatly reducing labor intensity. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a perspective view of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the tank body of the present invention; Figure 3 This is a schematic diagram of the powder hopper structure of the present invention; Figure 4 This is a front view of the overall structure of the present invention.

[0018] In the diagram: 1. Base; 2. Tank body; 3. Baffle plate; 4. Pulping silo; 5. Pulping storage silo; 6. Infusion pipe; 7. Butterfly valve; 8. Powder pipe; 9. Inlet pipe; 10. Powder silo; 101. Support frame; 102. Screw conveyor structure; 103. Weighing sensor; 104. Electromagnetic valve; 105. Inner ring; 106. Outer ring; 107. Connecting rod; 108. Central shaft; 109. Spiral blade; 110. Conveyor motor; 11. Metering pump; 12. High-speed stirring structure; 121. Rotating shaft; 122. Stirring rod; 123. 124. Shearing mesh; 125. High-speed motor; 126. Mesh frame; 127. Filter screen; 128. Connecting arm; 13. Low-speed mixing structure; 131. Rotating shaft; 132. Low-speed motor; 133. Paddle; 134. Connecting sleeve; 135. Tilting plate; 136. Through hole; 14. Grouting pipe; 141. Pressure regulating valve; 15. Moving structure; 151. Moving wheel; 152. Support leg; 153. Hydraulic lifting rod; 154. Support foot; 155. Control switch; 156. Horizontal detection sensor; 16. Scraper; 17. Industrial control computer. Detailed Implementation

[0019] 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 skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1: As Figures 1 to 3 As shown: A cement slurry supply device for tunnel reinforcement construction includes a base 1 and a tank 2. The base 1 is horizontally positioned, and the tank 2 is vertically positioned on the base 1. Specifically, the tank and the base are fixedly connected by bolts. The tank 2 is divided into a slurry preparation chamber 4 and a slurry storage chamber 5, which are located vertically, by a partition 3. The partition 3 is fixed to the tank by welding. Vertically positioned liquid delivery pipes 6 are installed on the partition 3, and these pipes are fixed to the partition by welding. A butterfly valve 7 is also installed on the liquid delivery pipe 6; this arrangement aims to ensure a good seal while also facilitating automated material delivery. The top of the slurry preparation chamber 4 is connected to a powder pipe 8 and a liquid inlet pipe 9. In a preferred embodiment, there are two liquid inlet pipes, which can be connected to water and cement admixtures respectively. A one-piece molded powder hopper 10 is provided in the middle of the powder pipe 8. The powder hopper 10 is also equipped with a screw conveyor structure 102 via a support frame 101. The support frame 101 includes an inner ring 105, an outer ring 106, and a connecting rod 107. The outer ring 106 and the inner ring 105 form an integral structure through the connecting rod 107. The outer ring 106 is connected and fixed to the inner wall of the powder hopper 10, specifically by welding. The screw conveyor structure 102 includes a central shaft 108, a spiral blade 109, and a conveying motor 110. The central shaft 108 is vertically distributed between the upper and lower inner rings 105, specifically by welding. The spiral blade 109 is disposed on the central shaft 108, and the two are fixed by welding. The conveying motor 110 is connected to the central shaft 108. The conveying motor is a micro motor, which is used to drive the central shaft and the spiral blade as a whole to rotate, ensuring the stability of powder conveying and avoiding blockage.

[0021] The feeding equipment is equipped with a high-speed vortex slurry mixing chamber and a low-speed anti-sedimentation slurry storage chamber. The spiral powder conveyor is equipped with a weighing sensor, and the water, cement and admixture are automatically proportioned with the water-cement ratio error controlled within ±1.5%. The slurry storage chamber continuously stirs at low speed to prevent cement sedimentation and stratification, and ensures that the slurry is evenly delivered to the cavity of the inner lining plate.

[0022] like Figure 2 and Figure 3As shown: In this embodiment, a weighing sensor 103 and an electromagnetic switch valve 104 are sequentially installed at the lower part of the powder silo 10. This arrangement facilitates precise quantity control. Metering pumps 11 are installed on each of the liquid inlet pipes 9; this arrangement ensures precise control of the slurry ratio and grouting pressure of the feeding equipment, significantly improves slurry quality, reduces the void rate on the back of the lining plate from 8% to less than 1%, significantly improves the density of the cement slurry filling, and greatly enhances the durability of the tunnel lining reinforcement. A high-speed stirring structure 12 is also provided inside the slurry preparation silo 4. Preferably, the high-speed stirring structure 12 includes a rotating shaft 121, stirring rods 122, a shearing mesh 123, and a high-speed motor 124. The rotating shafts 121 are vertically distributed in the slurry preparation silo 4, and the connection is achieved through bearings. The high-speed motor 124 is mounted on the top of the tank 2 via a bracket and connected to the rotating shafts 121. The stirring rods 122 are arranged on the rotating shafts 121 and are multiple rods evenly distributed in a ring. The shearing mesh 123 includes a mesh frame 125 and a filter screen 126 disposed within the mesh frame 125; the mesh frame 125 is connected to the rotating shaft 121 via a connecting arm 127; the stirring rod 122 consists of three layers distributed vertically; the filter screen 126 has a mesh size of 5-10 mesh. The purpose of this arrangement is to allow high-speed stirring in the upper layer of the pulping chamber, while simultaneously high-speed shearing occurs in the lower layer, eliminating air bubbles in the mixed liquid and improving the mixing quality of the slurry.

[0023] like Figure 2 As shown: In this embodiment, the slurry storage silo 5 is further provided with a low-speed mixing structure 13. Specifically, the low-speed mixing structure 13 includes a rotating shaft 131, a low-speed motor 132, a paddle 133, a connecting sleeve 134, and a tilting plate 135. The rotating shaft 131 is vertically installed in the slurry storage silo 5, the low-speed motor 132 is located at the bottom of the tank body 2 and connected to the rotating shaft 131. The connecting sleeve 134 is installed on the rotating shaft 131, and the two are threadedly connected. The paddle 133 is located on the upper part of the connecting sleeve 134, and the tilting plate 135 is located on the lower part of the connecting sleeve 134. The three are integrally fixed structures. The tilting plate 135 is also provided with multiple evenly distributed through holes 136. With this configuration, the forward rotation of the low-speed motor drives the shaft to rotate clockwise. The shaft and connecting sleeve are threaded together, causing the connecting sleeve, paddles, and tilting plate to move upwards and rotate simultaneously. Conversely, when the low-speed motor starts in reverse, the connecting sleeve, paddles, and tilting plate move downwards and rotate simultaneously. During this process, the paddles agitate the liquid, and the up-and-down movement of the tilting plate tumbles the slurry, preventing cement sedimentation and stratification, and ensuring the slurry is evenly delivered to the lining cavity.

[0024] like Figure 2As shown: In this embodiment, a grouting pipe 14 is also connected to one side of the grout storage tank 5, and a metering pump 11 is provided at the input end of the grouting pipe 14; a pressure regulating valve 141 is also provided on the grouting pipe 14. An industrial control computer 17 is also installed on the outside of the tank body 2 via a bracket. The industrial control computer can perform overall intelligent control of the material supply equipment. The specific working principle is existing technology, so its principle and connection circuit will not be described in detail. The grout ratio, grouting pressure, and flow rate of this material supply equipment are precisely controllable, the grout quality is greatly improved, and the tunnel reinforcement construction operation is more efficient.

[0025] Example 2: Based on Example 1, such as Figure 4 As shown: A cement slurry supply device for tunnel reinforcement construction further includes: a movable structure 15 located below the base 1, specifically, the movable structure 15 includes movable wheels 151 and support legs 152. The movable wheels 151 are mounted on the base 1 via brackets, and the support legs 152 are retractable. The support legs 152 include hydraulic lifting rods 153 and support feet 154. The hydraulic lifting rods 153 are vertically arranged on the base 1, and the support feet 154 are located at the bottom end of the hydraulic lifting rods 153. A control switch 155 is also provided on the front of the base 1, and a level detection sensor 156 is provided on the lower end face of the base 1. The level detection sensor 156 is connected to the control switch 155. This configuration allows for the detection of the overall levelness of the supply device via the level detection sensor, and automatic leveling is achieved by activating the hydraulic lifting rods at the corresponding positions via the control switch, ensuring the foundation stability of the tunnel reinforcement grouting operation. Meanwhile, when the entire feeding equipment is engaged in grouting operations, the hydraulic lifting rod is extended by controlling the switch, which means the moving wheels are lifted off the ground, making the operation more stable. When the entire feeding equipment needs to be moved, the hydraulic lifting rod is retracted by controlling the switch, which means the moving wheels are brought back to the ground, making movement more convenient, time-saving, and labor-saving.

[0026] Example 3: Based on Example 2, such as Figure 2 As shown: A cement slurry supply device for tunnel reinforcement construction further includes: scrapers 16 are provided at the outer ends of the mixing rod 122, the shearing mesh 123, and the blades 133, and the scrapers 16 maintain contact with the inner wall of the tank 2. The inner wall of the tank of this supply device is first polished to reduce drag and reduce slurry adhesion; at the same time, scrapers are installed to remove stubborn stains and lumps; after construction is completed, the device automatically starts to circulate clean water to clean the pump body, pipelines, and mixing chamber, requiring no manual operation throughout the process and significantly reducing labor intensity.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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.

[0028] It should be noted that, in specific embodiments of the present invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the use of phrases such as "comprising one" to define an element does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0029] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "equipped" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A cement slurry supply device for tunnel reinforcement construction, characterized in that: The feeding equipment includes a base (1) and a tank (2); the base (1) is horizontally distributed, and the tank (2) is vertically distributed on the base (1), and the tank (2) is divided into a pulping chamber (4) and a pulp storage chamber (5) by a partition (3); a vertically distributed liquid delivery pipe (6) is provided on the partition (3), and a butterfly switch valve (7) is also provided on the liquid delivery pipe (6); the top of the pulping chamber (4) is connected to a powder pipe (8) and an inlet pipe (9), and an integrally formed powder silo (10) is provided in the middle of the powder pipe (8). The powder silo (10) is also equipped with a screw conveying structure (102) by a support frame (101), and a weighing sensor (103) and an electromagnetic switch valve (104) are installed in sequence at the bottom of the powder silo (10); a metering pump (11) is provided on each of the inlet pipes (9); a high-speed stirring structure (12) is also provided in the pulping chamber (4); the ... The high-speed stirring structure (12) includes a rotating shaft (121), stirring rods (122), a shearing mesh (123), and a high-speed motor (124); the rotating shaft (121) is vertically arranged in the pulping tank (4), and the high-speed motor (124) is mounted on the top of the tank body (2) via a bracket and connected to the rotating shaft (121); the stirring rods (122) are arranged on the rotating shaft (121) and are multiple rods evenly distributed in a ring; the shearing mesh (123) covers... The structure includes a mesh frame (125) and a filter screen (126) installed inside the mesh frame (125); the mesh frame (125) is connected to the rotating shaft (121) via a connecting arm (127); a low-speed mixing structure (13) is also provided inside the slurry storage tank (5); a grouting pipe (14) is also connected to one side of the slurry storage tank (5), and a metering pump (11) is also provided at the input end of the grouting pipe (14); and a pressure regulating valve (141) is also provided on the grouting pipe (14).

2. The cement slurry supply equipment for tunnel reinforcement construction as described in claim 1, characterized in that: The base (1) is also provided with a movable structure (15) below it. The movable structure (15) includes a movable wheel (151) and a support leg (152). The movable wheel (151) is mounted on the base (1) by a bracket, and the support leg (152) is retractable.

3. The cement slurry supply equipment for tunnel reinforcement construction as described in claim 2, characterized in that: The support leg (152) includes a hydraulic lifting rod (153) and a support foot (154). The hydraulic lifting rod (153) is vertically distributed on the base (1), and the support foot (154) is located at the bottom end of the hydraulic lifting rod (153). The front of the base (1) is also provided with a control switch (155), and the lower end face of the base (1) is also provided with a horizontal detection sensor (156). The horizontal detection sensor (156) and the control switch (155) are connected by a signal.

4. The cement slurry supply equipment for tunnel reinforcement construction as described in claim 3, characterized in that: The support frame (101) includes an inner ring (105), an outer ring (106) and a connecting rod (107); the outer ring (106) and the inner ring (105) form an integral structure through the connecting rod (107), and the outer ring (106) is connected and fixed to the inner wall of the powder silo (10).

5. A cement slurry supply device for tunnel reinforcement construction as described in claim 4, characterized in that: The spiral conveying structure (102) includes a central shaft (108), a spiral blade (109), and a conveying motor (110); the central shaft (108) is vertically distributed between the upper and lower inner rings (105), the spiral blade (109) is disposed on the central shaft (108), and the conveying motor (110) is connected to the central shaft (108).

6. The cement slurry supply equipment for tunnel reinforcement construction as described in claim 5, characterized in that: The stirring rod (122) consists of three layers distributed vertically; the filter screen (126) has a mesh size of 5-10 mesh.

7. A cement slurry supply device for tunnel reinforcement construction as described in claim 6, characterized in that: The low-speed mixing structure (13) includes a rotating shaft (131), a low-speed motor (132), a blade (133), a connecting sleeve (134), and a turning plate (135). The rotating shaft (131) is vertically installed in the slurry storage silo (5). The low-speed motor (132) is located at the bottom of the tank body (2) and connected to the rotating shaft (131). The connecting sleeve (134) is installed on the rotating shaft (131) and the two are threadedly connected. The blade (133) is located on the upper part of the connecting sleeve (134). The turning plate (135) is located on the lower part of the connecting sleeve (134), and the turning plate (135) is also provided with multiple evenly distributed through holes (136).

8. A cement slurry supply device for tunnel reinforcement construction as described in claim 7, characterized in that: Scrapers (16) are provided at the outer ends of the stirring rod (122), shearing mesh (123), and paddle (133), and the scrapers (16) are in contact with the inner wall of the tank (2).

9. A cement slurry supply device for tunnel reinforcement construction as described in claim 8, characterized in that: An industrial control computer (17) is also installed on the outside of the tank (2) via a bracket.

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