Tunnel grouting material fluidity measuring device and measuring method

Abstract

The invention provides a device and method for measuring the fluidity of a tunnel grouting material, and belongs to the technical field of grouting material test.The device for measuring the fluidity of the tunnel grouting material comprises a top plate, side frames, a mounting table, a box body, a vertical adjusting mechanism, a conical tank, a turnover mechanism, a clamping and fixing mechanism and the like. The top plate and the side frame form a frame structure, the vertical adjusting mechanism controls the conical tank to ascend and descend through a bidirectional lead screw and a lead screw nut plate, and delayed opening of a bottom outlet is achieved through a first spring. The turnover mechanism comprises a motor, a first rotating rod, a second rotating rod, a fixing plate and a second collecting frame, the turnover mechanism drives the second collecting frame to incline through transmission of the motor and the rotating rods, and the clamping and fixing mechanism fixes and releases the second collecting frame. The test method comprises a horizontal test and a tilt test, and the fluidity is evaluated by measuring the material flow range and time. The device can simulate different working conditions and accurately measure the fluidity of the tunnel grouting material, and has innovativeness and practicability.

Description

Technical Field

[0001] The present invention belongs to the technical field of grouting material testing, and particularly relates to a device and method for measuring the fluidity of tunnel grouting materials. Background Art

[0002] The grouting technology is widely used in tunnel engineering, underground space construction, geotechnical reinforcement and other fields, and is one of the important construction means to improve the stability of the stratum and control groundwater leakage. Before grouting construction, it is of great significance to evaluate the performance of grouting materials. Among them, fluidity, as a key index reflecting the pumpability and diffusion ability of materials, directly affects its filling effect in the stratum and construction quality.

[0003] At present, there are various test devices for measuring the fluidity of grouting materials in engineering practice. However, most of them have deficiencies such as single function and inability to simulate variable actual working conditions. Many traditional measurement methods can only perform fluidity tests in the horizontal state and cannot accurately reflect the actual flow of grouting materials at different inclination angles, resulting in a deviation between the test results and actual applications. In addition, there are also many problems with some existing equipment in terms of material release control, measurement accuracy, and operation convenience. For example, it is difficult to accurately control the timing of material release, the measurement data is not accurate enough, and the complex structure of the equipment leads to cumbersome operation. These have greatly restricted the efficiency and accuracy of the measurement work and are difficult to meet the urgent need for accurate evaluation of the performance of grouting materials in modern tunnel engineering construction. Summary of the Invention

[0004] The purpose of the present invention is to provide a device and method for measuring the fluidity of tunnel grouting materials, aiming to solve the problems in the prior art that it is difficult to accurately simulate the flow state of grouting materials under actual construction conditions, the operation flexibility is insufficient, and the collection and cleaning of materials after testing are inconvenient.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: A device for measuring the fluidity of tunnel grouting materials, comprising: A top plate, with side frames fixedly connected to the periphery of the bottom of the top plate, and a feed hopper provided at the top of the top plate. A mounting table is fixedly installed at the bottom of the side frame, and a box body is provided below the mounting table; A vertical adjustment mechanism, comprising: A bidirectional lead screw, horizontally rotatably connected to a mounting seat on the side of the side frame; Two lead screw nut plates, symmetrically engaged on both sides of the bidirectional lead screw, and brackets are fixedly connected to the sides thereof; A cross bar, with both ends respectively connected to the bracket and a sliding seat, and the sliding seat slides left and right along the U-shaped chute of the side frame; A conical tank, suspended below the cross bar through a connecting rod and a connecting seat and adjusted for lifting by the vertical adjustment mechanism. The outlet at the bottom of the conical tank is controlled to open and close by a plugging component; A flipping mechanism, the flipping mechanism includes a motor, a first rotating rod, a second rotating rod, a fixing plate, and a second collection box. The motor is arranged on the side of the L-shaped seat and its rotating shaft is rotatably connected to the first rotating rod. One end of the first rotating rod is drivingly connected to one end of the second rotating rod through a sprocket and chain. The other end of the second rotating rod rotatably penetrates through the U-shaped plate and is connected to the fixing plate; A clamping and fixing mechanism, the clamping and fixing mechanism includes a moving plate, a sliding groove, a sliding block, a telescopic rod, and a second spring. A convex block extends from the side end of the moving plate and is slidably connected to the fixing plate through a sliding block and sliding groove structure. The second collection box is clamped and fixed to the limiting port through the convex block at the side end of the moving plate. The second spring is sleeved on the telescopic end of the telescopic rod and its two ends respectively abut against the fixed end of the telescopic rod and the side of the moving plate.

[0006] As a preferred solution of the present invention, a first rectangular plate is sleeved on the cross bar. Both ends of the connecting rod are rotatably connected to the first rectangular plate and the connecting seat through rotating shafts respectively. The lower end of the connecting seat is fixedly connected to a second rectangular plate. The conical tank is fixed on the second rectangular plate and its bottom outlet is located below the second rectangular plate.

[0007] As a preferred solution of the present invention, in the vertical adjustment mechanism, when the bidirectional lead screw rotates forward, it drives the lead screw nut plate to separate, driving the conical tank to rise and compress the circular plug; when rotating in the reverse direction, the lead screw nut plate closes, and the conical tank descends in two stages: The first stage: the first spring is compressed to maintain the seal; The second stage: after the first spring returns to its original position, the circular plug disengages from the bottom outlet of the conical tank.

[0008] As a preferred solution of the present invention, in the normal state, the second spring pushes the two moving plates closer to each other, so that the convex block remains in the locked state of being inserted into the limiting port; when the two moving plates are pulled outwards to compress the second spring, the distance between the moving plates increases to release the second collection box.

[0009] As a preferred solution of the present invention, the plugging assembly includes a connecting frame, a long rod, a sleeve, a first spring, and a circular plug. The connecting frame is fixedly connected to the upper end of the feed hopper. The long rod is connected to the lower end of the connecting frame. The sleeve is slidably sleeved on the circumferential surface of the long rod. The circular plug is fixedly connected to the lower end of the sleeve. The first spring is arranged in the circumferential cavity of the sleeve and its upper end abuts against the long rod, and the lower end abuts against the circular plug.

[0010] As a preferred solution of the present invention, a smooth rod is rotatably connected to the side end of the side frame. The smooth rod is rotatably connected to the lower end of the lead screw nut plate. The smooth rod is connected to the second rotating rod and the bidirectional lead screw through a sprocket and chain respectively. When the conical tank descends, the smooth rod synchronously drives the second rotating rod to rotate, driving the second collection box to tilt.

[0011] As a preferred embodiment of the present invention, concentric circle scales are provided on the top surface of the second collection box centered on the bottom outlet of the conical tank for observing the flow expansion range of the grouting material.

[0012] As a preferred embodiment of the present invention, a chute frame is fixedly connected to the inner wall of the side end of the box body, and a first collection box with a handle is slidably connected to the chute frame, and the first collection box is used for receiving the grouting material poured out from the second collection box.

[0013] As a preferred embodiment of the present invention, the length of the top plate is equal to the side end length of the side frame, and the inner diameter of the lower end outlet of the feed hopper is the same as the inner diameter of the conical tank.

[0014] On the other hand, this solution also provides a measurement method for a tunnel grouting material fluidity measurement device, including the following steps: Horizontal test process: a. Keep the second collection box horizontal, and rotate the bidirectional screw rod through the handwheel to raise the conical tank until its bottom outlet abuts against the circular plug to form a seal. b. Inject the grouting material to be measured into the conical tank through the feed hopper, and rotate the bidirectional screw rod in the reverse direction to lower the conical tank, and its bottom outlet is separated from the circular plug, and the grouting material to be measured flows into the horizontally placed second collection box. c. Observe the flow range of the material on the surface of the second collection box, and read the farthest flow distance and coverage area of the concentric circle scale. Inclined test process: Rotate the bidirectional screw rod through the handwheel to raise the conical tank until its bottom outlet abuts against the circular plug to form an initial seal, and continue to rotate the bidirectional screw rod to further raise the conical tank, compress the first spring to a preset compression amount, and inject the grouting material to be measured into the conical tank through the feed hopper; b. Keep the current position of the bidirectional screw rod, connect the optical rod and the second rotating rod through a sprocket chain, and at the same time, the optical rod drives the bidirectional screw rod to rotate in the reverse direction, so that the conical tank descends synchronously. c. During the descent of the conical tank, the elastic force of the first spring keeps the circular plug in sealed contact with the outlet of the conical tank until the first spring returns to its natural length. d. When the first spring returns to its natural length, the outlet of the conical tank opens, and the material flows into the second collection box with the inclination angle reaching the preset value synchronously. e. Record the flow time of the material from entry to exit through the trigger sensors arranged at the inlet end and the bottom end of the inclined surface of the second collection box.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this solution: By setting up a flipping mechanism, the second collection box can be tilted to different angles to simulate various inclined working conditions that the materials may encounter during the actual construction of tunnel grouting, making the measurement results more in line with the actual application.

[0016] 2. In this solution: Utilize the elastic potential energy of the first spring to achieve a delayed opening of the outlet at the bottom of the conical tank, ensuring the coordination between the material release timing and the tilting angle of the second collection box, and avoiding the instability of the flow pattern caused by instantaneous impact.

[0017] 3. In this solution: The second collection box is detachable through the snap - fit of the convex block and the limiting opening, and a sliding groove frame is provided on the inner wall of the box to slidably connect the first collection box, facilitating the rapid cleaning of the residual materials after the test and reducing the risk of cross - contamination. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. In the drawings: Figure 1 is a three - dimensional view of the present invention; Figure 2 is an exploded view of the present invention; Figure 3 is of the present invention Figure 2 an exploded view at the side frame in; Figure 4 is of the present invention Figure 2 an exploded view at the installation platform in; Figure 5 is of the present invention Figure 3 an exploded view at the side frame in; Figure 6 is of the present invention Figure 5 an enlarged view at B in; Figure 7 is of the present invention Figure 4 an enlarged view at A in; Figure 8 is of the present invention Figure 7 an exploded view at the L - shaped seat in; Figure 9 is of the present invention Figure 8 an enlarged view at C in; Figure 10 is of the present invention Figure 3 a cross - sectional view at the long rod plate in; Figure 11 is of the present invention Figure 7 an enlarged view of the second collection box at D in.

[0019] In the figure: 1. Side frame; 101. Top plate; 102. Feed hopper; 103. Connecting frame; 104. Long rod; 1041. Sleeve; 1042. First spring; 105. Circular plug; 106. U-shaped chute; 107. Sliding seat; 108. Cross bar; 109. First rectangular plate; 110. Connecting rod; 111. Connecting seat; 112. Second rectangular plate; 113. Conical tank; 2. Mounting seat; 201. Bidirectional lead screw; 202. Smooth rod; 203. Lead screw nut plate; 204. Bracket; 3. Mounting table; 301. Box body; 302. Chute frame; 303. First collection frame; 304. Handle; 4. Motor; 5. L-shaped seat; 501. U-shaped plate; 502. First rotating rod; 503. Second rotating rod; 6. Fixed plate; 601. Moving plate; 602. Chute; 603. Slide block; 604. Expansion rod; 605. Second spring; 606. Protrusion; 7. Second collection frame; 701. Limit port. Detailed implementation manner

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Embodiment 1: Please refer to Figures 1 - 11 , the present invention provides a device for measuring the fluidity of tunnel grouting materials, including: The top plate 101, with the side frames 1 fixedly connected to the four peripheries of the bottom of the top plate 101 and a feed hopper 102 provided on the top thereof, and a mounting table 3 fixedly installed at the bottom of the side frame 1, and a box body 301 is provided below the mounting table 3; The vertical adjustment mechanism includes: A bidirectional lead screw 201, horizontally rotatably connected to the mounting seat 2 on the side of the side frame 1; Two lead screw nut plates 203, symmetrically engaged on both sides of the bidirectional lead screw 201 and a bracket 204 fixedly connected to the side surface thereof; A cross bar 108, with both ends respectively connected to the bracket 204 and the sliding seat 107, and the sliding seat 107 slides left and right along the U-shaped chute 106 of the side frame 1; A conical tank 113, suspended below the cross bar 108 through a connecting rod 110 and a connecting seat 111 and adjusted for lifting and lowering by the vertical adjustment mechanism, and the opening and closing of the bottom outlet of the conical tank 113 is controlled by a plugging assembly; The flipping mechanism, the flipping mechanism includes a motor 4, a first rotating rod 502, a second rotating rod 503, a fixing plate 6, and a second collection box 7. The motor 4 is provided on the side of the L-shaped seat 5 and its rotating shaft is rotatably connected to the first rotating rod 502. One end of the first rotating rod 502 is drivingly connected to one end of the second rotating rod 503 through a sprocket and chain, and the other end of the second rotating rod 503 rotatably penetrates through the U-shaped plate 501 and then is connected to the fixing plate 6; The clamping and fixing mechanism, the clamping and fixing mechanism includes a moving plate 601, a chute 602, a slider 603, a telescopic rod 604, and a second spring 605. A convex block 606 extends from the side end of the moving plate 601 and is slidably connected to the fixing plate 6 through a slider 603 and a chute 602 structure. The second collection box 7 is clamped and fixed to the limiting port 701 through the convex block 606 at the side end of the moving plate 601. The second spring 605 is sleeved on the telescopic end of the telescopic rod 604 and its two ends respectively abut against the fixed end of the telescopic rod 604 and the side surface of the moving plate 601.

[0024] In a specific embodiment of the present invention, the vertical adjustment mechanism realizes the lifting movement of the conical tank 113. The bidirectional lead screw 201 is horizontally installed on the mounting seat 2 on the side of the side frame 1 and can rotate smoothly in both forward and reverse directions. Two lead screw nut plates 203 are symmetrically installed on both sides of the bidirectional lead screw 201. As the bidirectional lead screw 201 rotates, the lead screw nut plates 203 can accurately move along the axial direction of the bidirectional lead screw 201. A bracket 204 is fixedly connected to the side of each lead screw nut plate 203, and the other end of the bracket 204 is connected to the cross bar 108. Both ends of the cross bar 108 are respectively connected to the bracket 204 and the sliding seat 107, and the sliding seat 107 is embedded in the U-shaped chute 106 of the side frame 1 and can slide left and right along the U-shaped chute 106, so as to ensure that the cross bar 108 and the conical tank 113 suspended below it remain stable during the lifting process. The conical tank 113 is made of high-quality steel, and its inner wall is smooth to ensure that the grouting material can flow out smoothly. Its bottom outlet is equipped with a plugging component, which includes a connecting frame 103, a long rod 104, a sleeve 1041, a first spring 1042 and a circular plug 105. The connecting frame 103 is fixed to the upper end of the feed hopper 102, the long rod 104 is connected to the lower end of the connecting frame 103, the sleeve 1041 is slidably sleeved on the long rod 104, and the circular plug 105 is fixed to the lower end of the sleeve 1041. The first spring 1042 is installed in the circumferential cavity of the sleeve 1041 and abuts against the long rod 104 and the circular plug 105 at both ends respectively. When the conical tank 113 rises, the circular plug 105 is pressed tightly against the bottom outlet of the conical tank to achieve sealing; when the conical tank 113 descends, the circular plug 105 is separated from the bottom outlet of the conical tank under the action of the spring force and gravity, so as to open the outlet and release the grouting material. The flipping mechanism is responsible for driving the second collection frame 7 to flip to simulate the flow of the grouting material at different inclination angles. When the motor 4 is started, the first rotating rod 502 rotates, drives the second rotating rod 503 to rotate through the sprocket chain drive, and then makes the fixing plate 6 and the second collection frame 7 installed thereon rotate around the axis of the second rotating rod 503 to achieve the flipping action. The L-shaped seat 5 and the U-shaped plate 501 are both high-strength metal structures to ensure the stability and safety of the flipping process. The clamping and fixing mechanism is used to firmly install the second collection frame 7 on the fixing plate 6 and can be quickly disassembled when needed. A convex block 606 extends from the side end of the moving plate 601 and is slidably connected to the fixing plate 6 through the slider 603 and the chute 602 structure. The cooperation of the slider 603 and the chute 602 ensures that the moving plate 601 can slide smoothly along the fixing plate 6. Under the elastic force of the second spring 605, the two moving plates 601 move towards each other, so that the convex block 606 is inserted into the limiting port 701 on the side of the second collection frame 7, thereby firmly fixing the second collection frame 7 on the fixing plate 6. When it is necessary to disassemble the second collection frame 7, only need to pull the moving plate 601 outwards, compress the second spring 605, and make the convex block 606 withdraw from the limiting port 701, then the second collection frame 7 can be easily removed.This clamping and fixing method not only ensures the stability of the second collection box 7 during the flipping process, but also facilitates the quick replacement of the second collection box 7, improving the convenience of using the device.

[0025] For details, please refer to Figure 5 and Figure 6 A first rectangular plate 109 is sleeved on the cross bar 108. Both ends of the connecting rod 110 are rotatably connected to the first rectangular plate 109 and the connecting seat 111 through rotating shafts respectively. The lower end of the connecting seat 111 is fixedly connected to a second rectangular plate 112. The conical tank 113 is fixed on the second rectangular plate 112 and its bottom outlet is located below the second rectangular plate 112.

[0026] In this embodiment: A first rectangular plate 109 is sleeved on the cross bar 108. The first rectangular plate 109 is made of high-quality steel and has high strength and rigidity. Its shape matches the cross-section of the cross bar 108, can be tightly sleeved on the cross bar 108, and is ensured not to have relative sliding during use through the positioning device. Both ends of the first rectangular plate 109 are respectively connected to the connecting rod 110 through rotating shafts. This rotational connection method enables the connecting rod 110 to freely rotate within a certain range, so as to adapt to the hanging requirements of the conical tank 113 at different height positions. The second rectangular plate 112 is connected to the first rectangular plate 109 on the cross bar 108 through the connecting rod 110 to form a stable hanging structure. The cross bar 108 is connected to the bidirectional screw rod 201 through the screw rod nut plate 203 to realize the lifting movement of the conical tank 113. The rotational connection between the connecting rod 110 and the first rectangular plate 109 and the connecting seat 111 enables the conical tank 113 to have a certain flexibility during the lifting process and can adapt to the use requirements of the device under different working conditions. This connection design also facilitates the installation and disassembly of the conical tank 113 and improves the maintenance convenience of the device.

[0027] For details, please refer to Figures 1 - 9 In the vertical adjustment mechanism, when the bidirectional screw rod 201 rotates forward, it drives the screw rod nut plate 203 to separate, driving the conical tank 113 to rise and press against the circular plug 105; when rotating in the reverse direction, the screw rod nut plate 203 closes, and the conical tank 113 descends in two stages: The first stage: The first spring 1042 is compressed to maintain the seal; The second stage: After the first spring 1042 is reset, the circular plug 105 disengages from the bottom outlet of the conical tank 113.

[0028] In this embodiment: A handwheel is also fixed to the side end of the bidirectional lead screw 201. When it is necessary to raise the conical tank 113, the operator drives the bidirectional lead screw 201 to rotate forward through the handwheel or the motor. With the rotation of the bidirectional lead screw 201, the lead screw nut plate 203 moves axially outward along the bidirectional lead screw 201 under the action of the thread, pushing the cross bar 108 and the sliding seat 107 to slide upward along the U-shaped chute 106 of the side frame 1. The rising of the cross bar 108 drives the conical tank 113 to rise synchronously. When the conical tank 113 rises to a certain position, its bottom outlet presses tightly against the circular plug 105, and is sealed under the action of the sealing assembly to prevent the grouting material from leaking. In the initial stage of the descent of the conical tank 113, due to the elastic force of the first spring 1042, the circular plug 105 still keeps in close contact with the bottom outlet of the conical tank 113, maintaining the sealed state. At this time, the first spring 1042 continues to be compressed, and the elastic potential energy further increases. This stage ensures that when the conical tank 113 starts to descend, the grouting material will not be released immediately. Through the storage and release of the elastic potential energy of the first spring 1042, the vertical adjustment mechanism realizes the delayed opening function of the bottom outlet of the conical tank 113. It not only effectively buffers the impact force when the material is released, but also ensures that the material has a stable flow form when flowing into the second collection frame 7, improving the accuracy and reliability of the test results.

[0029] For details, please refer to Figures 1 - 9 , under normal conditions, the second spring 605 pushes the two moving plates 601 closer to each other, so that the convex block 606 remains in the locked state of being stuck in the limit port 701; when the two moving plates 601 are pulled outward to compress the second spring 605, the distance between the moving plates 601 increases to release the second collection frame 7.

[0030] In this embodiment: Under normal conditions, the second spring 605 is in a natural elongation state, and its elastic force pushes the two moving plates 601 to move towards each other, so that the convex block 606 is tightly stuck in the limit port 701 on the side of the second collection frame 7, thereby firmly fixing the second collection frame 7 on the fixing plate 6. This locked state ensures that during the test, even if the device is flipped or vibrated, the second collection frame 7 can remain stable without loosening or displacement, ensuring the accuracy and reliability of the test data. When it is necessary to disassemble or replace the second collection frame 7, the operator only needs to pull the two moving plates 601 outward to overcome the elastic force of the second spring 605 and compress it. As the moving plates 601 move outward, the convex block 606 exits from the limit port 701. At this time, the locked state between the second collection frame 7 and the fixing plate 6 is released, and the operator can easily remove the second collection frame 7 for cleaning, replacement or maintenance and other operations. This design makes the disassembly and installation process of the second collection frame 7 simple and fast, improving the use convenience and maintenance efficiency of the device.

[0031] For details, please refer to Figure 3 and Figure 10, the plugging assembly includes a connecting frame 103, a long rod 104, a sleeve 1041, a first spring 1042 and a circular plug 105. The connecting frame 103 is fixedly connected to the upper end of the feed hopper 102. The long rod 104 is connected to the lower end of the connecting frame 103. The sleeve 1041 is slidably sleeved on the circumferential surface of the long rod 104. The circular plug 105 is fixedly connected to the lower end of the sleeve 1041. The first spring 1042 is arranged in the circumferential cavity of the sleeve 1041, with its upper end abutted against the long rod 104 and its lower end abutted against the circular plug 105.

[0032] In this embodiment: when the conical tank 113 rises, its bottom outlet gradually approaches the circular plug 105. As the conical tank 113 continues to rise, the circular plug 105 is subjected to a thrust force from the bottom outlet of the conical tank, overcoming the elastic force of the first spring 1042, driving the sleeve 1041 to slide upward along the long rod 104 and compressing the first spring 1042. At this time, the circular plug 105 closely fits against the bottom outlet of the conical tank 113 to form a seal, preventing the grouting material from leaking. At the same time, the first spring 1042 stores elastic potential energy. When it is necessary to release the grouting material, the conical tank 113 begins to descend. In the initial stage of the descent of the conical tank 113, the elastic force of the first spring 1042 is still greater than the acting force of the bottom outlet of the conical tank 113 on the circular plug 105. Therefore, the circular plug 105 maintains a sealed contact with the bottom outlet of the conical tank. As the conical tank 113 continues to descend, the compression amount of the first spring 1042 gradually decreases, and the elastic force also decreases accordingly. When the conical tank 113 descends to a certain position and the elastic force of the first spring 1042 is less than the acting force of the bottom outlet of the conical tank 113 on the circular plug 105, the circular plug 105 is under the thrust of the bottom outlet of the conical tank 113, overcoming the elastic force of the first spring 1042, driving the sleeve 1041 to slide downward along the long rod 104, and the circular plug 105 separates from the bottom outlet of the conical tank 113, realizing the opening of the bottom outlet of the conical tank, and the grouting material flows out under the action of gravity and enters the second collection frame 7 for fluidity testing.

[0033] Specifically, please refer to Figure 3 , Figure 4 , Figure 6 and Figure 8 , the side end of the side frame 1 is rotatably connected to a smooth rod 202. The smooth rod 202 is rotatably connected to the lower end of the lead screw nut plate 203. The smooth rod 202 is connected to the second rotating rod 503 and the bidirectional lead screw 201 through sprockets and chains respectively. When the conical tank 113 descends, the smooth rod 202 synchronously drives the second rotating rod 503 to rotate, driving the second collection frame 7 to tilt.

[0034] In this embodiment: The polished rod 202 is connected to the second rotating rod 503 and the bidirectional lead screw 201 respectively through sprockets and chains, forming a linkage drive system. When the conical tank 113 descends, the polished rod 202 synchronously drives the second rotating rod 503 to rotate, driving the second collection frame 7 to tilt. This drive design ensures the precise synchronization between the descending movement of the conical tank 113 and the tilting movement of the second collection frame 7, avoiding problems such as measurement errors or unstable material flow that may be caused by asynchronous movements of the two.

[0035] For details, please refer to Figure 1 and Figure 2 , concentric circles are set on the top surface of the second collection frame 7 centered on the bottom outlet of the conical tank 113, which are used to observe the flow expansion range of the grouting material.

[0036] In this embodiment: The second collection frame 7 is a key component for receiving the grouting material released from the conical tank 113. Concentric circles are set on its top surface centered on the bottom outlet of the conical tank 113. These concentric circles are drawn at certain intervals and radii, which are used to visually observe and measure the flow expansion range of the grouting material. By measuring the farthest distance and the covered area of the material flowing on the surface of the second collection frame 7, the flow performance of the grouting material at different tilting angles can be accurately evaluated.

[0037] For details, please refer to Figure 4 , a chute frame 302 is fixedly connected to the inner wall of the side end of the box body 301, and a first collection frame 303 with a handle 304 is slidably connected to the chute frame 302. The first collection frame 303 is used to receive the grouting material poured out from the second collection frame 7.

[0038] In this embodiment: After the grouting material has completed flowing and flows out of the second collection frame 7, the material finally falls into the first collection frame 303 arranged inside the box body 301. When the operator needs to take out the grouting material, hold the handle 304 and pull it outwards to pour out the material or clean it. After cleaning or replacement is completed, push the first collection frame 303 back into the box body 301 through the chute frame 302 to restore the initial state.

[0039] For details, please refer to Figure 3 and Figure 6 , the length of the top plate 101 is equal to the side end length of the side frame 1, and the inner diameter of the lower end outlet of the feed hopper 102 is the same as the inner diameter of the conical tank 113.

[0040] In this embodiment: The design that the top plate 101 is equal in length to the side frame 1 enables the entire device to form an overall frame with uniform force during installation and use. The inner diameter of the lower outlet of the feed hopper 102 is smaller than the inner diameter of the inlet of the conical tank 113. This design can form a certain flow rate and pressure when the grouting material flows into the conical tank 113, ensuring that the material can smoothly enter the conical tank 113. This design is particularly suitable for grouting materials with high viscosity or easy to block, and can effectively prevent the material from accumulating or blocking at the connection between the feed hopper 102 and the conical tank 113, ensuring the smooth progress of the test process.

[0041] The usage process of this device: First, check each component to ensure firm installation and smooth operation, and prepare the material to be tested. Enter the horizontal test stage, rotate the handwheel to make the bidirectional lead screw 201 rotate forward, drive the conical tank 113 to rise and press tightly against the circular plug 105 to form a seal, and then inject the grouting material through the feed hopper 102. Then rotate the bidirectional lead screw 201 in the reverse direction to make the conical tank 113 descend, and the material flows into the horizontally placed second collection frame 7, and read the scale to obtain the fluidity data. During the inclined test, continue to rotate the handwheel to make the conical tank 113 rise further and compress the first spring 1042. After injecting the material, keep the position of the bidirectional lead screw 201, connect the optical rod 202 with the second rotating rod 503, rotate the bidirectional lead screw 201 in the reverse direction to make the conical tank 113 descend, and use the elastic potential energy of the first spring 1042 to delay the opening of the outlet of the conical tank 113 to ensure that the release of the material is coordinated with the tilting action of the second collection frame 7, and record the material flow time. After the test, clean the material in the second collection frame 7 and organize the data, and finally clean and maintain the device. The entire process ensures the accurate determination of the fluidity of the tunnel grouting material.

[0042] Embodiment 2: On the other hand, the present invention also provides a method for measuring the fluidity of tunnel grouting materials, including the following two test methods: The horizontal test process for the fluidity of the grouting material: a. Keep the second collection frame 7 horizontal, and rotate the bidirectional lead screw 201 through the handwheel to make the conical tank 113 rise until the bottom outlet thereof abuts against the circular plug 105 to form a seal; b. Inject the grouting material to be tested into the conical tank 113 through the feed hopper 102, rotate the bidirectional lead screw 201 in the reverse direction to make the conical tank 113 descend, and the bottom outlet thereof disengages from the circular plug 105, and the grouting material to be tested flows into the horizontally placed second collection frame 7; Observe the flow range of the material on the surface of the second collection frame 7, and read the farthest flow distance and the covered area of the concentric circle scale; The inclined test process for the fluidity of the grouting material: Rotate the bidirectional lead screw 201 through the handwheel to raise the conical tank 113 until the outlet at its bottom abuts against the circular plug 105 to form an initial seal. Continue to rotate the bidirectional lead screw 201 to further raise the conical tank 113, compress the first spring 1042 to a preset compression amount, and inject the grouting material to be tested into the conical tank 113 through the feed hopper 102; b. Keep the current position of the bidirectional lead screw 201, connect the polished rod 202 and the second rotating rod 503 through a sprocket chain. At the same time, the polished rod 202 drives the bidirectional lead screw 201 to rotate in the reverse direction, so that the conical tank 113 descends synchronously; c. During the descent of the conical tank 113, the elastic force of the first spring 1042 maintains the sealed contact between the circular plug 105 and the outlet of the conical tank 113 until the first spring 1042 returns to its natural length; d. When the first spring 1042 returns to its natural length, the outlet of the conical tank 113 opens, and the material flows into the second collection box 7 with the inclination angle reaching the preset value synchronously; Record the flow time of the material from entry to exit through the trigger sensors arranged at the inlet end and the bottom end of the inclined surface of the second collection box 7.

[0043] Result analysis: Based on the fluidity data obtained from the horizontal and inclined tests and combined with the actual construction requirements, it is judged that the fluidity of this cement slurry meets the standards for this tunnel project construction and can meet the construction requirements.

[0044] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used 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 perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A device for measuring the fluidity of a tunnel grouting material, characterized in that, Including: A top plate (101), the periphery of the bottom of the top plate (101) is fixedly connected to a side frame (1), and a feed hopper (102) is provided on the top thereof. A mounting table (3) is fixedly installed at the bottom of the side frame (1), and a box body (301) is provided under the mounting table (3); A vertical adjustment mechanism, including: A bidirectional lead screw (201), horizontally rotatably connected to a mounting seat (2) on the side of the side frame (1); Two lead screw nut plates (203), symmetrically engaged on both sides of the bidirectional lead screw (201), and a bracket (204) is fixedly connected to the side thereof; A cross bar (108), the two ends of which are respectively connected to the bracket (204) and a sliding seat (107), and the sliding seat (107) slides left and right along the U-shaped chute (106) of the side frame (1); A conical tank (113), suspended under the cross bar (108) through a connecting rod (110) and a connecting seat (111) and adjusted for lifting by the vertical adjustment mechanism. The bottom outlet of the conical tank (113) is controlled to open and close by a plugging assembly; A flipping mechanism, the flipping mechanism includes a motor (4), a first rotating rod (502), a second rotating rod (503), a fixing plate (6), and a second collection frame (7). The motor (4) is arranged on the side of an L-shaped seat (5), and its rotating shaft is rotatably connected to the first rotating rod (502). One end of the first rotating rod (502) is drivingly connected to one end of the second rotating rod (503) through a sprocket and chain, and the other end of the second rotating rod (503) rotatably penetrates through a U-shaped plate (501) and then is connected to the fixing plate (6); A clamping and fixing mechanism, the clamping and fixing mechanism includes a moving plate (601), a chute (602), a slider (603), a telescopic rod (604), and a second spring (605). A convex block (606) extends from the side end of the moving plate (601), and the moving plate (601) is slidably connected to the fixing plate (6) through a slider (603) and chute (602) structure. The second collection frame (7) is clamped and fixed to the limiting port (701) through the convex block (606) at the side end of the moving plate (601). The second spring (605) is sleeved on the telescopic end of the telescopic rod (604), and the two ends thereof respectively abut against the fixed end of the telescopic rod (604) and the side of the moving plate (601).

2. The fluidity measuring device for tunnel grouting material according to claim 1, wherein: A first rectangular plate (109) is sleeved on the cross bar (108). The two ends of the connecting rod (110) are respectively rotatably connected to the first rectangular plate (109) and the connecting seat (111) through a rotating shaft. The lower end of the connecting seat (111) is fixedly connected to a second rectangular plate (112). The conical tank (113) is fixed on the second rectangular plate (112), and its bottom outlet is located below the second rectangular plate (112).

3. The fluidity measuring device for tunnel grouting material according to claim 2, wherein: In the vertical adjustment mechanism, when the bidirectional lead screw (201) rotates forward, it drives the lead screw nut plates (203) to separate, driving the conical tank (113) to rise and press against the circular plug (105); when rotating in the reverse direction, the lead screw nut plates (203) close, and the conical tank (113) descends in two stages: The first stage: The first spring (1042) is compressed to maintain the seal; The second stage: After the first spring (1042) resets, the circular plug (105) disengages from the bottom outlet of the conical tank (113).

4. The fluidity measuring device for tunnel grouting material according to claim 3, characterized in that: The second spring (605) pushes the two moving plates (601) closer to each other under normal conditions, keeping the bump (606) locked in the limit port (701); when the two moving plates (601) are pulled outward to compress the second spring (605), the distance between the moving plates (601) increases to release the second collection box (7).

5. The fluidity measuring device for tunnel grouting material according to claim 4, characterized in that: The plugging assembly includes a connecting frame (103), a long rod (104), a sleeve (1041), a first spring (1042) and a circular plug (105). The connecting frame (103) is fixedly connected to the upper end of the feed hopper (102). The long rod (104) is connected to the lower end of the connecting frame (103). The sleeve (1041) is slidably sleeved on the circumferential surface of the long rod (104). The circular plug (105) is fixedly connected to the lower end of the sleeve (1041). The first spring (1042) is arranged in the circumferential cavity of the sleeve (1041), with its upper end abutting against the long rod (104) and its lower end abutting against the circular plug (105).

6. The fluidity measuring device for tunnel grouting material according to claim 1, wherein: A smooth rod (202) is rotatably connected to the side end of the side frame (1). The smooth rod (202) is rotatably connected to the lower end of the lead screw nut plate (203). The smooth rod (202) is connected to the second rotating rod (503) and the bidirectional lead screw (201) respectively through sprockets and chains. When the conical tank (113) descends, the smooth rod (202) synchronously drives the second rotating rod (503) to rotate, driving the second collection box (7) to tilt.

7. The fluidity measuring device for tunnel grouting material according to claim 1, characterized in that: Concentric circles are set on the top surface of the second collection box (7) centered on the bottom outlet of the conical tank (113) for observing the flow and spread range of the grouting material.

8. The fluidity measuring device for tunnel grouting material according to claim 7, wherein: A chute frame (302) is fixedly connected to the inner wall of the side end of the box body (301). A first collection box (303) with a handle (304) is slidably connected to the chute frame (302). The first collection box (303) is used to receive the grouting material poured out from the second collection box (7).

9. The fluidity measuring device for tunnel grouting material according to claim 1, wherein: The length of the top plate (101) is equal to the length of the side end of the side frame (1). The inner diameter of the lower end outlet of the feed hopper (102) is the same as the inner diameter of the conical tank (113).

10. A method for measuring the fluidity of a tunnel grouting material, using a device for measuring the fluidity of a tunnel grouting material according to any one of claims 1-9, characterized in that, It includes the following two test methods: Test process for the fluidity level of the grouting material: a. Keep the second collection box (7) horizontal. Rotate the bidirectional lead screw (201) through the handwheel to raise the conical tank (113) until the bottom outlet thereof abuts against the circular plug (105) to form a seal; b. Inject the grouting material to be tested into the conical tank (113) through the feed hopper (102). Rotate the bidirectional lead screw (201) in the reverse direction to lower the conical tank (113), and the bottom outlet thereof is separated from the circular plug (105). The grouting material to be tested flows into the horizontally placed second collection box (7); c. Observe the flow range of the material on the surface of the second collection box (7), and read the maximum flow distance and coverage area of the concentric circles; Test process for the fluidity inclination of the grouting material: Rotate the bidirectional lead screw (201) through the handwheel to raise the conical tank (113) until the bottom outlet thereof abuts against the circular plug (105) to form an initial seal. Continue to rotate the bidirectional lead screw (201) to further raise the conical tank (113), compress the first spring (1042) to a preset compression amount, and inject the grouting material to be tested into the conical tank (113) through the feed hopper (102); b. Keep the current position of the bidirectional lead screw (201), connect the polished rod (202) and the second rotating rod (503) through a sprocket chain. At the same time, the polished rod (202) drives the bidirectional lead screw (201) to rotate in the reverse direction, so that the conical tank (113) descends synchronously; c. During the descent of the conical tank (113), the elastic force of the first spring (1042) keeps the circular plug (105) in sealing contact with the outlet of the conical tank (113) until the first spring (1042) returns to its natural length; d. When the first spring (1042) returns to its natural length, the outlet of the conical tank (113) opens, and the material flows into the second collection box (7) whose inclination angle reaches the preset value synchronously; e. Record the flow time of the material from entry to exit through the trigger sensors arranged at the inlet end and the bottom end of the inclined surface of the second collection box (7).

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