A lightweight concrete block permeability detection device

Abstract

The application discloses a light-weight concrete block water permeability detection device and belongs to the technical field of new material detection. The support ball drives the sliding frame to slide, and the sliding frame drives the piston plate to reciprocate through the push-pull rod, so that the water injection check valve pipe injects water into the water storage frame, simultaneously, the electric push rod drives the push-pull wheel to displace, drives the adjusting disc to slide horizontally along the convex strip outside the transmission shaft, the adjusting disc is hinged and linked with the swing disc through the adjusting rod at the edge, the eccentric swing amplitude of the swing disc is adjusted, the greater the eccentric amplitude is, the longer the reciprocating sliding stroke of the sliding frame is, the greater the piston plate telescopic displacement is, the higher the single water injection flow and the water pressure inside the water storage frame are, the smaller the eccentric amplitude is, and the more gentle the water pressure is. Through accurate adjustment of the swing amplitude and the rotation frequency, various working conditions of static constant pressure, low-frequency gentle water pressure and high-frequency pulse high-pressure water pressure can be flexibly switched, natural rainfall, rainstorm scouring, intermittent water seepage and other engineering actual scenes are simulated, and the dynamic water permeability performance detection of the block is realized.

Description

Technical Field

[0001] This invention relates to the field of new material testing technology, specifically to a device for testing the permeability of lightweight concrete blocks. Background Technology

[0002] Lightweight concrete blocks are a new type of wall building material made from lightweight aggregates, cement, admixtures and water, such as autoclaved aerated concrete blocks and green and environmentally friendly concrete blocks. They have many advantages such as light weight, heat insulation, sound insulation and noise reduction, energy saving and environmental protection, and convenient construction. They are widely used in various engineering scenarios such as sponge city construction, building exterior wall cladding, interior partitions, municipal landscaping and other projects.

[0003] Currently, the industry mostly uses traditional permeability testing equipment and manual assistance to test the permeability of lightweight concrete blocks. The testing equipment can only achieve static constant pressure permeability testing. A certain amount of clean water is added to the upper water storage chamber to maintain a fixed water level, so that the upper part of the block is always subjected to constant hydrostatic pressure. However, it cannot simulate the dynamic seepage scenario of real engineering projects. The permeability parameters obtained by the test deviate significantly from the permeability performance of the block under actual service conditions, making it difficult to accurately predict the permeability stability and durability of the block in long-term service. Summary of the Invention

[0004] The purpose of this invention is to provide a lightweight concrete block permeability testing device to solve the problem mentioned in the background art that existing testing equipment cannot simulate the dynamic seepage scenario of real engineering projects, and the permeability parameters obtained from the test deviate significantly from the permeability performance of the blocks under actual service conditions.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A device for testing the permeability of lightweight concrete blocks includes a support frame, a water collection tank located below the support frame, a level gauge installed on one side of the water collection tank, four electro-hydraulic rods fixedly mounted on the top of the support frame, a top frame fixedly connected to the bottom of the four electro-hydraulic rods, a support box fixedly connected to the bottom of the top frame, a material support assembly located below the support box, the material support assembly fixedly mounted on the water collection tank, and the bottom of the support frame fixed to the front and rear sides of the material support assembly. A water storage frame is fixedly connected to the bottom of the support box, currently located inside the material support assembly, and a disturbance is provided inside the water storage frame. The flow assembly includes a flow disturbance component installed inside a support box. A water storage tank is fixed on the top frame, and a water pump is installed on the top of the water storage tank. A U-shaped plate is fixedly connected to the support box, and a reciprocating assembly is slidably installed in the U-shaped plate. Automatic liquid guiding components are fixedly connected to both sides of the reciprocating assembly. Two automatic liquid guiding components are fixed to both sides of the top of the support box. One end of the top of the two automatic liquid guiding components is connected to the water storage tank, and the bottom end of the two automatic liquid guiding components penetrates the support box and is connected to the water storage frame. A dynamic pressurizing component is slidably installed in the middle of the reciprocating assembly, and the dynamic pressurizing component is installed inside the U-shaped plate.

[0007] As a further embodiment of the present invention, the material support assembly includes a bracket, the extended ends of the bracket on the front and rear sides are fixedly connected to the water collection tank, and the bottom end of the support frame is fixed to the extended end of the bracket. A rectangular block placement cavity is provided inside the bracket. The top opening of the block placement cavity is provided with a U-shaped outer lower sealing gasket, and the bottom opening of the block placement cavity is connected to the water collection tank. An outer upper sealing gasket overlaps the outer lower sealing gasket. The outer upper sealing gasket is fixed at the bottom edge of the support box. A U-shaped support frame is fixed inside the block placement cavity. An inner lower sealing gasket is provided on the support frame. An inner upper sealing gasket is provided above the inner lower sealing gasket. The inner upper sealing gasket is fixed at the bottom edge of the water storage frame. The water storage frame is slidably inserted into the block placement cavity and is interconnected. The area between the inner lower sealing gasket and the inner upper sealing gasket is used to place lightweight concrete blocks.

[0008] As a further embodiment of the present invention, the turbulence-disrupting assembly includes a drive motor, which is installed in a groove at the top of the support box. A rotating roller is fixed to the output shaft at the bottom of the drive motor. A wave groove is formed around the outside of the rotating roller. A sliding ball is slidably connected inside the wave groove. A vertical rod is fixed to one end of the sliding ball. The vertical rod is slidably connected to the support box through a rod sleeve. A turbulence-disrupting rod is fixed to the bottom of the vertical rod. A central seat is fixed to one end of several turbulence-disrupting rods opposite each other. The turbulence-disrupting rods are located inside the water storage frame.

[0009] As a further embodiment of the present invention, a drive gear is fixed to the output shaft at the top of the drive motor, three transmission gears are meshed on the outside of the drive gear, a connecting shaft is fixed in the middle of the transmission gear, the connecting shaft is rotatably connected to the support box through a bushing, and a baffle is fixed to the bottom end of the connecting shaft, the baffle being located between adjacent baffle rods.

[0010] As a further embodiment of the present invention, the reciprocating assembly includes a slide, which is designed in an inverted U-shape and has a support ball fixed in the middle of its inner wall. Two slide rods are fixed inside the slide and slide through the U-shaped plate. Springs are sleeved on both sides of the slide rods and the springs are fixed between the U-shaped plate and the slide.

[0011] As a further embodiment of the present invention, the automatic liquid guiding assembly includes a liquid guiding box, which is fixed to one side of a support box. A piston plate is provided inside the liquid guiding box, and a push-pull rod is fixed to one side of the piston plate. One end of the push-pull rod passes through the liquid guiding box and is fixed to one side of the slide. A pumping one-way valve pipe and three water injection one-way valve pipes are installed on the side of the liquid guiding box away from the slide. The top end of the pumping one-way valve pipe is connected to a water storage cylinder, and the bottom end of the water injection one-way valve pipe passes through the support box and is connected to a water storage frame.

[0012] As a further embodiment of the present invention, the dynamic boosting component includes a servo motor, which is installed on one side inside the U-shaped plate. The output shaft of the servo motor is fixed to a transmission shaft, and the other end of the transmission shaft is rotatably connected to the U-shaped plate through a bushing. A swing disk and an adjusting disk are slidably installed outside the transmission shaft. The swing disk is slidably connected to the bottom end of a support ball in an annular groove on its outer side. A strip groove is provided in the middle of the swing disk. Two horizontal grooves are provided on the outer side of the transmission shaft. The swing disk is slidably connected to the two horizontal grooves through the strip groove. A sliding shaft is sleeved through the middle of the swing disk and is fixed inside the transmission shaft.

[0013] As a further embodiment of the present invention, two protrusions are fixed on the outside of the transmission shaft corresponding to the position of the adjustment disc. The limiting hole opened on the inner wall of the adjustment disc is horizontally slidably connected to the protrusions. A push-pull wheel is slidably connected in the annular groove opened on the outside of the adjustment disc. An electric push rod is installed in the middle of the push-pull wheel. The electric push rod is fixed through and fixed on one side of the U-shaped plate. Adjustment rods are rotatably connected to the edges of the opposite surfaces of the swing disc and the adjustment disc through pins.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention activates a servo motor, which drives a transmission shaft to rotate at a constant speed. The transmission shaft slides through an outer horizontal groove and a strip groove on the swing disk, driving the swing disk to rotate and swing synchronously. The outer annular groove of the swing disk slides against the support ball on the inner wall of the carriage. During the rotation of the swing disk, the eccentric swing structure continuously pushes and releases the support ball, causing the carriage to overcome the spring force and slide back and forth at high frequency. Simultaneously, the electric push rod on the outer side of the U-shaped plate pushes the push-pull wheel to move, causing the adjustment disk to slide horizontally along the convex strip on the outer side of the transmission shaft. By hinged to the edge adjustment rod, the eccentric swing amplitude of the swing disk can be precisely adjusted. The larger the eccentric amplitude, the longer the reciprocating sliding stroke of the slide, the greater the displacement of the piston plate, and the higher the single water injection flow rate and the instantaneous water pressure inside the water storage frame. The smaller the eccentric amplitude, the smoother the water pressure. By precisely adjusting the swing amplitude and rotation frequency, various working conditions such as static constant pressure, low-frequency smooth water pressure, and high-frequency pulse high-pressure water pressure can be flexibly switched to accurately simulate actual engineering scenarios such as natural rainfall, rainstorm erosion, and intermittent seepage, and realize the dynamic permeability performance testing of the blocks. 2. This invention utilizes the height difference of a wave groove to continuously move a slider up and down. The slider causes the upright to move vertically in a straight line, which in turn drives multiple sets of flow-dispersing rods to perform high-speed up-and-down reciprocating motions inside the water storage frame. The vertically moving flow-dispersing rods continuously lift, push, and disturb the water inside the water storage frame, effectively breaking down water stratification, excessively fast surface flow velocity, and stagnant water at the bottom, and eliminating the defects of uneven static water pressure. Simultaneously, the drive gear meshes to drive three sets of transmission gears to rotate synchronously, transmitting power... The gear drives the bottom baffle to rotate at high speed horizontally through the connecting shaft. Multiple sets of rotating baffles are evenly distributed between the gaps of the reciprocating baffle rods, forming a dynamic and static composite baffle structure with vertical reciprocating disturbance and horizontal rotational agitation. The dual baffle structure works together to quickly eliminate dead zones, water pressure fluctuations and flow velocity stratification in the water storage frame, making the water flow velocity and water pressure acting on the surface of the block uniform and stable throughout the process. This avoids the problem of localized excessively fast or slow seepage due to uneven water flow, and improves the repeatability and accuracy of the test data. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments 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.

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the connection between the support box and the material support assembly of the present invention; Figure 3This is a structural schematic diagram of the cross-section of the support box and the material support assembly of the present invention; Figure 4 This is a schematic diagram of the material support assembly of the present invention; Figure 5 This is a schematic diagram of the support box of the present invention viewed from below; Figure 6 This is a schematic diagram of the cross-section of the support box of the present invention; Figure 7 This is a schematic diagram of the structure of the turbulence-disrupting component of the present invention; Figure 8 This is a schematic diagram of the structure of the baffle plate of the present invention; Figure 9 This is a schematic diagram of the structure of the U-shaped plate and the reciprocating assembly of the present invention; Figure 10 This is a schematic diagram of the reciprocating component of the present invention; Figure 11 This is a schematic diagram of the automatic liquid guiding component of the present invention; Figure 12 This is a schematic diagram of the dynamic booster assembly of the present invention; Figure 13 This is a side view of the cross-sectional structure of the swing disk of the present invention.

[0017] The attached diagram lists the components represented by each number as follows: 1. Support frame; 2. Water collection tank; 3. Level gauge; 4. Electro-hydraulic rod; 5. Material support assembly; 501. Support bracket; 502. Outer lower sealing gasket; 503. Support frame; 504. Inner lower sealing gasket; 6. Support box; 7. Outer upper sealing gasket; 8. Water storage frame; 9. Inner upper sealing gasket; 10. Top frame; 11. Baffle assembly; 111. Drive motor; 112. Rotary roller; 113. Corrugated groove; 114. Sliding ball; 115. Upright pole; 116. Baffle rod; 117. Center seat; 118. Drive gear; 119. Transmission gear; 1191. Connecting shaft; 1192. Baffle plate; 12. Water storage 13. Cylinder; 14. Water pump; 15. U-shaped plate; 16. Reciprocating assembly; 17. Slide; 18. Support ball; 19. Slide rod; 10. Spring; 11. Automatic liquid guiding assembly; 12. Liquid guiding box; 13. Piston plate; 14. Push-pull rod; 15. Pumping check valve pipe; 16. Injection check valve pipe; 17. Dynamic pressurization assembly; 18. Servo motor; 19. Drive shaft; 10. Swing disc; 11. Strip groove; 12. Horizontal groove; 13. Sliding shaft; 14. Adjusting disc; 15. Raised bar; 16. Push-pull wheel; 17. Electric push rod; 18. Adjusting rod. Detailed Implementation

[0018] 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.

[0019] Please see Figures 1-13 The present invention provides a technical solution:

[0020] A device for testing the permeability of lightweight concrete blocks includes a support frame 1, a water collection tank 2 located below the support frame 1, and a level gauge 3 installed on one side of the water collection tank 2. The level gauge 3 installed on the inside of the water collection tank 2 can monitor the change in water volume inside the water collection tank 2 in real time and accurately. Combined with the detection time and the permeable cross-sectional area of ​​the block, the core parameters of permeability and infiltration rate of the lightweight concrete block can be accurately calculated.

[0021] Four electric hydraulic rods 4 are fixedly installed on the top of the support frame 1. The bottom ends of the four electric hydraulic rods 4 are fixedly connected to the top frame 10. The bottom of the top frame 10 is fixedly connected to the support box 6. The material support assembly 5 is provided below the support box 6. The material support assembly 5 is fixedly installed on the water collection tank 2. The bottom end of the support frame 1 is fixed to the front and rear sides of the material support assembly 5. The bottom of the support box 6 is fixedly connected to the water storage frame 8. The water storage frame 8 is currently inside the material support assembly 5. In the initial stage of the test operation, the device is in the standby reset state. The electric hydraulic rods 4 are fully retracted, which drives the top frame 10, the support box 6 and the water storage frame 8 to be lifted as a whole, leaving operating space for sample clamping.

[0022] As a further embodiment of the present invention, the material support assembly 5 includes a bracket 501, the extended ends of the bracket 501 on the front and rear sides are fixedly connected to the water collection tank 2, and the bottom end of the support frame 1 is fixed to the extended end of the bracket 501. A rectangular block placement cavity is provided inside the bracket 501, and the bottom opening of the block placement cavity is connected to the water collection tank 2. A U-shaped outer lower sealing gasket 502 is provided at the top opening of the block placement cavity, and an outer upper sealing gasket 7 overlaps on the outer lower sealing gasket 502. The outer upper sealing gasket 7 is fixed at the bottom edge of the support box 6. A U-shaped support frame 503 is fixed inside the block placement cavity. An inner lower sealing gasket 504 is provided on the support frame 503. An inner upper sealing gasket 9 is provided above the inner lower sealing gasket 504. The inner upper sealing gasket 9 is fixed at the bottom edge of the water storage frame 8. The water storage frame 8 is fixedly connected to the bottom of the support box 6. The water storage frame 8 is slidably inserted into the block placement cavity and is interconnected with each other. The area between the inner lower sealing gasket 504 and the inner upper sealing gasket 9 is used to place lightweight concrete blocks.

[0023] During operation, the lightweight concrete block to be tested is placed on the support frame 503 of the block placement cavity inside the bracket 501, so that the block is precisely fitted to the upper surface of the inner lower sealing gasket 504, completing the inner sealing foundation laying. The four sets of electric hydraulic rods 4 are controlled to extend downward simultaneously, pushing the top frame 10 and the bottom fixed support box 6 and water storage frame 8 to move down as a whole, so that the water storage frame 8 can be precisely slid into the block placement cavity of the bracket 501. During the downward movement, the outer upper sealing gasket 7 of the bottom edge of the support box 6 and the outer lower sealing gasket 502 of the top of the bracket 501 are tightly fitted to form an outer ring sealing structure, which completely seals the gap on the top periphery of the block placement cavity and blocks external air and leakage water interference.

[0024] The inner upper sealing gasket 9 of the bottom edge of the water storage frame 8 is pressed down and adheres to the upper surface of the block, forming an inner closed testing cavity with the inner lower sealing gasket 504. The lightweight concrete block is completely sealed and clamped between the double sealing structures. The double sealing structures work together to prevent water from leaking from the gaps at the edge of the block during the testing process.

[0025] As a further embodiment of the present invention, a flow-disrupting component 11 is provided inside the water storage frame 8. The flow-disrupting component 11 is installed inside the support box 6. The flow-disrupting component 11 includes a drive motor 111. The drive motor 111 is installed in the groove at the top of the support box 6. A rotating roller 112 is fixed to the output shaft at the bottom of the drive motor 111. A wave groove 113 is opened around the outside of the rotating roller 112. A slider 114 is slidably connected inside the wave groove 113. A vertical rod 115 is fixed to one end of the slider 114. The vertical rod 115 is slidably connected to the support box 6 through a rod sleeve. A flow-disrupting rod 116 is fixed to the bottom end of the vertical rod 115. A center seat 117 is fixed to one end of several flow-disrupting rods 116 opposite to each other. The flow-disrupting rods 116 are located inside the water storage frame 8.

[0026] During operation, the bottom output shaft of the drive motor 111 drives the rotating roller 112 to rotate at a constant speed. The wave groove 113 on the outer side of the rotating roller 112 slides and engages with the slider 114. During the rotation of the rotating roller 112, the height difference of the wave groove 113 continuously moves the slider 114 up and down. The slider 114 drives the upright 115 to move vertically in a straight line. The upright 115 then drives multiple sets of turbulence rods 116 to move up and down at high speed inside the water storage frame 8. The vertically moving turbulence rods 116 continuously lift, push and disturb the water inside the water storage frame 8, which can effectively break the problems of water stratification, excessive surface flow velocity and stagnant water at the bottom, and eliminate the defects of uneven static water pressure.

[0027] A drive gear 118 is fixed to the output shaft at the top of the drive motor 111. Three transmission gears 119 mesh with the drive gear 118. A connecting shaft 1191 is fixed in the middle of the transmission gear 119. The connecting shaft 1191 is rotatably connected to the support box 6 through a bushing. A baffle 1192 is fixed to the bottom end of the connecting shaft 1191. The baffle 1192 is located between adjacent baffle rods 116.

[0028] During operation, the top output shaft of the drive motor 111 synchronously drives the drive gear 118 to rotate. The drive gear 118 meshes with and drives three sets of transmission gears 119 to rotate synchronously. The transmission gears 119 drive the bottom baffles 1192 to rotate at high speed horizontally through the connecting shaft 1191. Multiple sets of rotating baffles 1192 are evenly distributed between the gaps of the up-and-down reciprocating baffle rods 116, forming a dynamic and static composite baffle structure of vertical reciprocating disturbance and horizontal rotational churning. This quickly eliminates dead angles in the water flow, water pressure fluctuations, and flow velocity stratification problems within the water storage frame 8, ensuring that the water flow velocity and water pressure acting on the upper surface of the block are uniform and stable throughout the entire process.

[0029] As a further embodiment of the present invention, a water storage cylinder 12 is fixed on the top frame 10, and a water pump 13 is installed on the top of the water storage cylinder 12. A U-shaped plate 14 is fixedly connected to the support box 6. A reciprocating assembly 15 is slidably installed in the U-shaped plate 14. The reciprocating assembly 15 includes a slide 151. The slide 151 has an inverted U-shaped design and a support ball 152 is fixed in the middle of its inner wall. Two slide rods 153 are fixed inside the slide 151. The slide rods 153 slide through the U-shaped plate 14. Springs 154 are sleeved on both sides of the slide rods 153. The springs 154 are fixed between the U-shaped plate 14 and the slide 151. During the process of the support ball 152 being subjected to a rigid pushing force, it drives the entire slide 151 to overcome the pre-tightening force of the springs 154 on both sides and make a linear translational movement along the axis of the slide rods 153 of the U-shaped plate 14. The slide rods 153 support and limit the slide 151, thereby improving the stability of the horizontal reciprocating movement of the slide 151.

[0030] As a further embodiment of the present invention, two automatic liquid guiding components 16 are fixedly connected to both sides of the reciprocating component 15. The two automatic liquid guiding components 16 are fixed to the top of the support box 6 on both sides. One end of the top of the two automatic liquid guiding components 16 is connected to the water storage cylinder 12, and the bottom end of the two automatic liquid guiding components 16 penetrates the support box 6 and is connected to the water storage frame 8. The automatic liquid guiding assembly 16 includes a liquid guiding box 161, which is fixed to one side of the support box 6. A piston plate 162 is provided inside the liquid guiding box 161. A push-pull rod 163 is fixed to one side of the piston plate 162. One end of the push-pull rod 163 passes through the liquid guiding box 161 and is fixed to one side of the slide 151. A pumping one-way valve pipe 164 and three water injection one-way valve pipes 165 are installed on the side of the liquid guiding box 161 away from the slide 151. The top end of the pumping one-way valve pipe 164 is connected to the water storage tank 12, and the bottom end of the water injection one-way valve pipe 165 passes through the support box 6 and is connected to the water storage frame 8.

[0031] During operation, when the slide 151 slides laterally back and forth along the U-shaped plate 14, it can simultaneously drive the push-pull rod 163 to extend and retract, thereby driving the piston plate 162 inside the liquid guide box 161 to move back and forth, realizing the periodic change of the cavity volume. When the piston plate 162 is pulled outward with the push-pull rod 163, a negative pressure is formed inside the liquid guide box 161. At this time, the water injection check valve 165 is closed and the water extraction check valve 164 is opened. The clean water inside the water storage cylinder 12 is sucked into the liquid guide box 161 through the water extraction check valve 164, completing the automatic water extraction operation. When the piston plate 162 is pushed inward with the push-pull rod 163, the water pressure inside the liquid guide box 161 increases. The water extraction check valve 164 is closed and the three sets of water injection check valves 165 are opened simultaneously. The water inside the liquid guide box 161 is quickly injected into the water storage frame 8 through the water injection check valve 165, completing the uniform water injection operation.

[0032] As a further embodiment of the present invention, a dynamic boosting component 17 is slidably mounted in the middle of the reciprocating assembly 15, and the dynamic boosting component 17 is installed inside the U-shaped plate 14. The dynamic boosting component 17 includes a servo motor 171, which is installed on one side inside the U-shaped plate 14. The output shaft of the servo motor 171 is fixed to a transmission shaft 172, and the other end of the transmission shaft 172 is rotatably connected to the U-shaped plate 14 through a bushing. A swing disk 173 and an adjusting disk 177 are slidably mounted on the outside of the transmission shaft 172. The swing disk 173 is slidably connected to the bottom end of the support ball 152 in an annular groove on its outside. A strip groove 174 is provided in the middle of the swing disk 173, and two horizontal grooves 175 are provided on the outside of the transmission shaft 172. The swing disk 173 is slidably connected to the two horizontal grooves 175 through the strip groove 174. A sliding shaft 176 is sleeved through the middle of the swing disk 173, and the sliding shaft 176 is fixed inside the transmission shaft 172.

[0033] During operation, the output shaft of the servo motor 171 drives the transmission shaft 172 to rotate at a constant speed inside the U-shaped plate 14. Two horizontal grooves 175 are symmetrically opened on the outer wall of the transmission shaft 172, and a strip groove 174 is opened through the center of the swing disk 173. The two horizontal grooves 175 and the strip groove 174 form a cross sliding fit structure, which allows the swing disk 173 to slide radially along the transmission shaft 172 and be driven by the transmission shaft 172 to rotate synchronously in the circumferential direction. During the process of the swing disk 173 sliding radially along the transmission shaft 172, the middle part of the swing disk 173 can slide and deflect outside the sliding shaft 176, changing its offset angle and improving the stability of the support for the swing disk 173.

[0034] As a further embodiment of the present invention, two protrusions 178 are fixed on the outside of the transmission shaft 172 corresponding to the position of the adjustment disk 177. The limiting hole opened on the inner wall of the adjustment disk 177 is horizontally slidably connected to the protrusions 178. A push-pull wheel 179 is slidably connected in the annular groove opened on the outside of the adjustment disk 177. An electric push rod 1791 is installed in the middle of the push-pull wheel 179. The electric push rod 1791 is fixed through and fixed on one side of the U-shaped plate 14. The edges of the opposite surfaces of the swing disk 173 and the adjustment disk 177 are respectively rotatably connected to the adjustment rod 1792 by a pin.

[0035] During operation, the electric push rod 1791 extends and retracts, driving the push-pull wheel 179 to push or pull the adjusting plate 177 laterally through the annular groove in the adjusting plate 177. This causes the adjusting plate 177 to move horizontally along the protrusion 178 of the drive shaft 172, thereby adjusting the axial distance between the adjusting plate 177 and the swing plate 173. During the horizontal movement of the adjusting plate 177, the adjusting rod 1792 deflects at an angle as the distance changes, which in turn pushes and pulls the swing plate 173 to make radial sliding fine adjustments along the horizontal groove 175 of the drive shaft 172. At the same time, the middle part of the swing plate 173 slides and deflects outside the sliding shaft 176, changing the rotational eccentricity of the swing plate 173 relative to the drive shaft 172, ultimately achieving the adjustment of the eccentric swing amplitude of the swing plate 173.

[0036] When the eccentricity is increased, the radius of the eccentric rotation trajectory of the swing disk 173 increases, the pushing displacement of the support ball 152 increases, the reciprocating sliding stroke of the slide 151 is lengthened simultaneously, which increases the telescopic displacement of the piston plate 162 inside the liquid guide box 161, increases the single pumping and water injection volume, and significantly increases the instantaneous water injection flow rate and impact water pressure inside the water storage frame 8, forming a high-frequency high-pressure pulse water flow to simulate the strong scouring conditions of rainstorms.

[0037] When the eccentricity is reduced, the eccentric trajectory of the swing plate 173 decreases, the reciprocating stroke of the slide 151 is shortened, the displacement of the piston plate 162 decreases, and the water injection flow and water pressure tend to be smooth, simulating the normal natural rainfall and slow seepage conditions.

[0038] When the eccentricity is adjusted to zero, the swing disk 173 does not swing eccentrically, the slide 151 remains stationary, and after the support box 6 moves up and separates from the bracket 501, water is directly injected into the block placement cavity in the bracket 501 to realize the traditional static constant pressure water permeability test.

[0039] Working principle of this invention:

[0040] In the initial stage of the testing operation, the device is in standby reset state. The electric hydraulic rod 4 is fully retracted, driving the top frame 10, support box 6, and water storage frame 8 to lift as a whole, reserving operating space for sample clamping. The lightweight concrete block to be tested is placed stably on the support frame 503 in the block placement cavity inside the bracket 501. The support frame 503 provides basic support and positioning for the block, ensuring that the block accurately fits the upper surface of the inner lower sealing gasket 504, completing the inner sealing foundation laying. The four sets of electric hydraulic rods 4 are controlled to extend downwards simultaneously, pushing the top frame 10 and the bottom-fixed support box 6 and water storage frame 8 to move downwards as a whole, allowing the water storage frame 8 to slide precisely into the block placement cavity of the bracket 501. During the process, the outer upper sealing gasket 7 at the bottom edge of the support box 6 and the outer lower sealing gasket 502 at the top of the bracket 501 are tightly fitted together to form an outer ring sealing structure, which completely seals the gap at the top periphery of the block placement cavity and blocks external air and leakage water interference. At the same time, the inner upper sealing gasket 9 at the bottom edge of the water storage frame 8 is pressed down and fitted to the upper surface of the block, forming an inner closed detection cavity with the inner lower sealing gasket 504. The lightweight concrete block is completely sealed and clamped between the double sealing structures. The double sealing structures work together to prevent water from seeping from the edge gaps of the block during the detection process, ensuring that all subsequent seepage water flows through the block body and avoiding deviations in the detection data caused by water leakage.

[0041] After the sample is sealed and positioned, the water pump 13 at the top of the top frame 10 is started. The water pump 13 draws external water and injects it into the water storage tank 12 to complete the storage and reserve of the test water source. The water storage tank 12 serves as a pressure-stabilized water supply carrier, controlling the servo motor 171 to work. The output shaft of the servo motor 171 drives the transmission shaft 172 to rotate at a constant speed inside the U-shaped plate 14. Two horizontal grooves 175 are symmetrically opened on the outer wall of the transmission shaft 172. A strip groove 174 is opened through the center of the swing disk 173. The two horizontal grooves 175 and the strip groove 174 form a cross sliding fit structure, so that the swing disk 173 can slide radially along the transmission shaft 172 and can be driven by the transmission shaft 172 to rotate synchronously in the circumferential direction. During the process of the swing disk 173 sliding radially along the transmission shaft 172, the middle part of the swing disk 173 can slide and deflect outside the sliding shaft 176. The swing disk 173 is an eccentric rotating structure, and its outer ring has a closed annular groove. The bottom end of the support ball 152, which is fixed in the center of the inner wall of 51, is embedded in the annular groove, so that the support ball 152 can slide in the annular groove in the swing disk 173. The annular groove moves in a circular eccentric trajectory with the swing disk 173. The side wall of the annular groove continuously and alternately generates a lateral pushing force and a release yielding stroke on the support ball 152. During the stage when the annular groove pushes the support ball 152, the support ball 152 is subjected to a rigid pushing force, which drives the entire slide 151 to overcome the pre-tightening force of the springs 154 on both sides and make a linear translational movement along the axis of the slide rod 153 of the U-shaped plate 14 to complete the forward pushing stroke. During the stage when the annular groove rotates and yields, the pushing force disappears quickly, and the compressed springs 154 on both sides release the elastic restoring force, pulling the slide 151 and the support ball 152 to synchronously reverse and return to slide, completing the return stroke. As the swing disk 173 continues to rotate continuously, the pushing, yielding, and restoring actions cycle at high frequency, thereby driving the slide 151 to reciprocate linearly at high frequency.

[0042] Because the slide 151 is fixedly connected to the push-pull rod 163 of the automatic liquid guiding assembly 16 on both sides, when the slide 151 slides laterally back and forth along the U-shaped plate 14, it can simultaneously drive the push-pull rod 163 to extend and retract, thereby driving the piston plate 162 inside the liquid guiding box 161 to move back and forth, realizing the periodic change of the cavity volume. When the piston plate 162 is pulled outward with the push-pull rod 163, a negative pressure is formed inside the liquid guiding box 161. At this time, the water injection check valve 165 is closed and the water extraction check valve 164 is opened. The clean water inside the water storage tank 12 is drawn into the liquid guiding box 161 through the water extraction check valve 164, completing the automatic liquid guiding assembly 161. In the automatic pumping operation, when the piston plate 162 is pushed inward with the push-pull rod 163, the water pressure inside the liquid guide box 161 increases, the pumping one-way valve pipe 164 closes, and the three sets of water injection one-way valve pipes 165 open simultaneously. The water inside the liquid guide box 161 is quickly injected into the water storage frame 8 through the water injection one-way valve pipes 165, completing the uniform water injection operation. The automatic liquid guide components 16 on both sides alternately pump and inject water in a synchronous cycle, which can realize the continuous replenishment of water flow inside the water storage frame 8, ensuring sufficient water volume during the detection process. At the same time, the multi-channel water injection structure makes the water distribution inside the water storage frame 8 more uniform, avoiding local water accumulation and uneven water pressure.

[0043] Simultaneously, the electric push rod 1791 is activated to extend and retract, driving the push-pull wheel 179 to laterally push or pull the adjusting plate 177 through the annular groove in the adjusting plate 177. This causes the adjusting plate 177 to move horizontally along the protrusion 178 of the drive shaft 172, thereby adjusting the axial distance between the adjusting plate 177 and the swing plate 173. During the horizontal translation of the adjusting plate 177, the adjusting rod 1792 deflects at an angle as the distance changes, which in turn pushes and pulls the swing plate 173 to make radial sliding fine adjustments along the horizontal groove 175 of the drive shaft 172. This changes the rotational eccentricity of the swing plate 173 relative to the drive shaft 172, ultimately adjusting the eccentric swing amplitude of the swing plate 173. When the eccentricity is increased, the radius of the eccentric rotation trajectory of the swing plate 173 increases, resulting in a greater pushing displacement of the support ball 152. The reciprocating sliding stroke of the slide 151 is extended, which increases the displacement of the piston plate 162 inside the liquid guide box 161. The single pumping and injection volume is increased, and the instantaneous injection flow rate and impact water pressure inside the water storage frame 8 are significantly increased, forming a high-frequency high-pressure pulse water flow to simulate the strong scouring conditions of heavy rain. When the eccentricity is reduced, the rotational eccentricity trajectory of the swing disk 173 is reduced, the reciprocating stroke of the slide 151 is shortened, the displacement of the piston plate 162 is reduced, and the injection flow rate and water pressure tend to be gentle, simulating the conditions of normal natural rainfall and slow seepage. When the eccentricity is adjusted to zero, the swing disk 173 has no eccentric swing, the slide 151 remains stationary, and after the support box 6 moves up and separates from the bracket 501, water is directly injected into the block placement cavity inside the bracket 501 to realize the traditional static constant pressure permeability detection.

[0044] The drive motor 111 in the top groove of the support box 6 is started. The output shaft at the bottom of the drive motor 111 drives the rotating roller 112 to rotate at a constant speed. The wave groove 113 on the outside of the rotating roller 112 slides and engages with the slider 114. During the rotation of the rotating roller 112, the height difference of the wave groove 113 continuously moves the slider 114 up and down. The slider 114 drives the upright 115 to move vertically up and down. The upright 115 then drives multiple sets of turbulence rods 116 to move up and down at high speed inside the water storage frame 8. The vertically moving turbulence rods 116 continuously lift and push the water inside the water storage frame 8. The disturbance can effectively break the problems of water stratification, excessive surface flow velocity, and stagnant water at the bottom, and eliminate the defects of uneven static water pressure. At the same time, the top output shaft of the drive motor 111 synchronously drives the drive gear 118 to rotate. The drive gear 118 meshes and drives three sets of transmission gears 119 to rotate synchronously. The transmission gears 119 drive the bottom baffle 1192 to rotate at high speed horizontally through the connecting shaft 1191. Multiple sets of rotating baffles 1192 are evenly distributed between the gaps of the up-and-down reciprocating baffle rods 116, forming a dynamic and static composite baffle structure of vertical reciprocating disturbance and horizontal rotational churning.

[0045] Under stable or dynamic water pressure, the water inside the water storage frame 8 penetrates the internal pores of the lightweight concrete block evenly, completing the water permeation process. The water penetrating the block flows into the water collection tank 2 below through the bottom opening of the block placement cavity, completing the centralized collection of the permeated water. The level gauge 3 installed inside the water collection tank 2 can monitor the change in water volume inside the water collection tank 2 in real time and accurately. Combined with the detection time and the permeable cross-sectional area of ​​the block, the core parameters of the permeability and permeation rate of the lightweight concrete block can be accurately calculated.

Claims

1. A device for detecting the permeability of lightweight concrete blocks, comprising a support frame (1), characterized in that: A water collection tank (2) is provided below the support frame (1). A level gauge (3) is installed on one side of the water collection tank (2). Four electric hydraulic rods (4) are fixedly installed on the top of the support frame (1). A top frame (10) is fixedly connected to the bottom of the four electric hydraulic rods (4). A support box (6) is fixedly connected to the bottom of the top frame (10). A material support assembly (5) is provided below the support box (6). The material support assembly (5) is fixedly installed on the water collection tank (2), and the bottom of the support frame (1) is fixed to the front and rear sides of the material support assembly (5). A water storage frame (8) is fixedly connected to the bottom of the support box (6). The water storage frame (8) is currently inside the material support assembly (5). A flow disturbance assembly (11) is provided inside the water storage frame (8). The flow disturbance assembly (11) is installed in the support box. (6) Inside, a water storage cylinder (12) is fixed on the top frame (10), a water pump (13) is installed on the top of the water storage cylinder (12), a U-shaped plate (14) is fixedly connected to the support box (6), a reciprocating component (15) is slidably installed in the U-shaped plate (14), an automatic liquid guiding component (16) is fixedly connected to both sides of the reciprocating component (15), two automatic liquid guiding components (16) are fixed on both sides of the top of the support box (6), one end of the top of the two automatic liquid guiding components (16) is connected to the water storage cylinder (12), and the bottom end of the two automatic liquid guiding components (16) penetrates the support box (6) and is connected to the water storage frame (8). A dynamic pressurizing component (17) is slidably installed in the middle of the reciprocating component (15), and the dynamic pressurizing component (17) is installed in the U-shaped plate (14).

2. The lightweight concrete block permeability testing device according to claim 1, characterized in that: The material support assembly (5) includes a bracket (501). The extended ends of the bracket (501) on both the front and rear sides are fixedly connected to the water collection tank (2), and the bottom end of the support frame (1) is fixed to the extended end of the bracket (501). A rectangular block placement cavity is provided inside the bracket (501). The top opening of the block placement cavity is provided with a U-shaped outer lower sealing gasket (502), and the bottom opening of the block placement cavity is connected to the water collection tank (2). An outer upper sealing gasket (7) overlaps on the outer lower sealing gasket (502). (7) A rectangular support frame (503) is fixed at the bottom edge of the support box (6). The support frame (503) is provided with an inner lower sealing gasket (504). An inner upper sealing gasket (9) is provided above the inner lower sealing gasket (504). The inner upper sealing gasket (9) is fixed at the bottom edge of the water storage frame (8). The water storage frame (8) is slidably inserted into the block placement cavity and is interconnected. The area between the inner lower sealing gasket (504) and the inner upper sealing gasket (9) is used to place lightweight concrete blocks.

3. The lightweight concrete block permeability testing device according to claim 1, characterized in that: The turbulence assembly (11) includes a drive motor (111), which is installed in the groove at the top of the support box (6). The output shaft at the bottom of the drive motor (111) is fixed with a rotating roller (112). A wave groove (113) is opened around the outside of the rotating roller (112). A slider (114) is slidably connected inside the wave groove (113). One end of the slider (114) is fixed with a vertical rod (115). The outside of the vertical rod (115) is slidably connected to the support box (6) through a rod sleeve. A turbulence rod (116) is fixed at the bottom of the vertical rod (115). A center seat (117) is fixed at one end of several turbulence rods (116) opposite to each other. The turbulence rods (116) are located inside the water storage frame (8).

4. The lightweight concrete block permeability testing device according to claim 3, characterized in that: The output shaft at the top of the drive motor (111) is fixed with a drive gear (118), and three transmission gears (119) mesh with the drive gear (118). A connecting shaft (1191) is fixed in the middle of the transmission gear (119). The connecting shaft (1191) is rotatably connected to the support box (6) through a bushing. A baffle (1192) is fixed at the bottom of the connecting shaft (1191). The baffle (1192) is located between adjacent baffle rods (116).

5. The lightweight concrete block permeability testing device according to claim 1, characterized in that: The reciprocating assembly (15) includes a carriage (151), which is an inverted U-shaped design and has a support ball (152) fixed in the middle of its inner wall. Two sliding rods (153) are fixed inside the carriage (151). The sliding rods (153) slide through the U-shaped plate (14). Springs (154) are sleeved on both sides of the sliding rods (153). The springs (154) are fixed between the U-shaped plate (14) and the carriage (151).

6. The lightweight concrete block permeability testing device according to claim 5, characterized in that: The automatic liquid guiding assembly (16) includes a liquid guiding box (161), which is fixed on one side of the support box (6). The liquid guiding box (161) is provided with a piston plate (162) inside. A push-pull rod (163) is fixed on one side of the piston plate (162). One end of the push-pull rod (163) passes through the liquid guiding box (161) and is fixed to one side of the slide (151). A pumping one-way valve pipe (164) and three water injection one-way valve pipes (165) are installed on the side of the liquid guiding box (161) away from the slide (151). The top end of the pumping one-way valve pipe (164) is connected to the water storage cylinder (12), and the bottom end of the water injection one-way valve pipe (165) passes through the support box (6) and is connected to the water storage frame (8).

7. The lightweight concrete block permeability testing device according to claim 1, characterized in that: The dynamic booster assembly (17) includes a servo motor (171), which is installed on one side inside the U-shaped plate (14). The output shaft of the servo motor (171) is fixed with a transmission shaft (172). The other end of the transmission shaft (172) is rotatably connected to the U-shaped plate (14) through a bushing. A swing disk (173) and an adjustment disk (177) are slidably installed on the outside of the transmission shaft (172). The annular groove on the outside of the swing disk (173) is slidably connected to the bottom end of the support ball (152). A strip groove (174) is opened in the middle of the swing disk (173). Two horizontal grooves (175) are opened on the outside of the transmission shaft (172). The swing disk (173) is slidably connected to the two horizontal grooves (175) through the strip groove (174). A sliding shaft (176) is sleeved through the middle of the swing disk (173). The sliding shaft (176) is fixed inside the transmission shaft (172).

8. The lightweight concrete block permeability testing device according to claim 7, characterized in that: Two protrusions (178) are fixed on the outside of the drive shaft (172) corresponding to the position of the adjustment disc (177). The limiting hole opened on the inner wall of the adjustment disc (177) is horizontally slidably connected to the protrusions (178). A push-pull wheel (179) is slidably connected in the annular groove opened on the outside of the adjustment disc (177). An electric push rod (1791) is installed in the middle of the push-pull wheel (179). The electric push rod (1791) is fixed through and fixed on one side of the U-shaped plate (14). The edges of the opposite surfaces of the swing disc (173) and the adjustment disc (177) are respectively connected to the adjustment rod (1792) by a pin.

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