Concrete quality detection device for hydraulic engineering

Abstract

The invention discloses a concrete quality detection device for a water conservancy project, and relates to the technical field of quality detection, and the concrete quality detection device comprises a supporting platform which is fixedly provided with a sample placing rack and is slidably connected with a moving rack; the quasi-dynamic impact assembly is arranged on the moving frame; the quasi-dynamic impact assembly comprises a second driving assembly, an elastic frame body and a pressing plate, and the elastic frame body comprises a limiting flat plate; the front side and the rear side of the limiting flat plate are each provided with two elastic parts, and the elastic force directions of the two elastic parts face the sample containing frame. The second driving assembly is used for driving the elastic frame body to do reciprocating motion towards the direction of the sample placing frame; and the two elastic parts can apply elastic force to the limiting flat plate. According to the scheme, the quasi-dynamic impact assembly is adopted, the dynamic influence of flood impact or water flow fluctuation can be truly simulated, the performance of concrete in a complex environment can be tested, and therefore more accurate prediction is provided for engineering design.

Description

Technical Field

[0001] The present invention relates to the technical field of quality detection, and in particular to a concrete quality detection device for water conservancy projects. Background Art

[0002] In water conservancy projects, especially river projects, concrete structures face fluctuating pressure during flood season. This fluctuation mainly comes from factors such as water level changes, flow rate changes, and the impact of floods. This impact force increases with the increase in water flow rate, bringing dynamic loads to the structure; this impact force is not only static pressure, but also fluctuating dynamic pressure, which may cause abrasion or vibration of the concrete surface, increasing the risk of cracks.

[0003] Existing testing devices mainly measure strength by applying gradually increasing static pressure to one end of the concrete sample, which is unable to simulate the dynamic loads and fluctuating pressures commonly found in actual engineering projects. In actual water conservancy projects, the dynamic impact force borne by the concrete structure is periodic and changes with the fluctuation of the water flow. This dynamic load is not fully reflected. Summary of the Invention

[0004] The present invention aims to address the deficiencies of the prior art and to provide a concrete quality detection device for water conservancy projects. By adopting this solution, by using a pseudo-dynamic impact component, it is possible to more realistically simulate the dynamic impact of flood impact or water flow fluctuations, test the performance of concrete in complex environments, and thus provide more accurate predictions for engineering design.

[0005] The present invention is achieved through the following technical solutions: A concrete quality detection device for water conservancy projects, comprising: A supporting platform, on which a sample placement rack is fixed, and a movable rack is slidably connected, wherein the movable rack can move away from or toward the sample placement rack; A pseudo-dynamic impact assembly is provided on the mobile frame; the pseudo-dynamic impact assembly includes a second drive assembly, an elastic frame and a pressure plate, the elastic frame includes a limiting plate, and the limiting plate can slide in the elastic frame toward the sample placement rack; The front and rear sides of the limiting plate are respectively provided with two elastic parts, the elastic force directions of the two elastic parts are both toward the sample placement rack, and the ends of the two elastic parts away from the limiting plate are fixed to the elastic frame; the pressing plate is located on the side of the elastic frame facing the sample placement rack, the pressing plate is connected to one end of the sliding rod, and the other end of the sliding rod slides into the elastic frame and is connected to the limiting plate; The second driving assembly is used to drive the elastic frame to perform reciprocating motion toward the sample placement rack; and during the movement of the elastic frame, both of the two elastic parts can apply elastic force to the limiting plate.

[0006] In contrast to the problem in the prior art that it is unable to simulate the dynamic loads and fluctuating pressures commonly encountered in actual projects, the present invention provides a concrete quality testing device for water conservancy projects. By adopting this solution, a pseudo-dynamic impact component is used to simulate the impact, fluctuations, and pressure changes that concrete will withstand from water flow in water conservancy projects. This can more accurately test the fatigue resistance, impact resistance, and durability of concrete, and help evaluate its strength changes under long-term use. In the specific solution, it includes a support platform, a sample placement rack for fixing samples on the support platform, and a mobile rack that can move toward the sample. A pseudo-dynamic impact component is provided on the mobile rack to drive the pressure plate to reciprocate and impact the sample. The pseudo-dynamic impact component includes a second drive component, an elastic frame, and a pressure plate, wherein the pressure plate is connected to one end of a sliding rod, and the other end of the sliding rod slides into the elastic frame and is connected to a limit plate. At this time, the sliding rod can slide along its own length. During specific operation, the mobile rack can first be moved toward the sample placement rack so that the pressure plate is initially pressed on the sample, and then the second drive component is activated to drive the elastic frame. The elastic frame performs reciprocating motion. During the reciprocating motion, the internal limit plate can slide freely, and the other ends of the two elastic parts can move synchronously with the elastic frame. In this way, the two elastic parts can simultaneously perform reciprocating motion of contraction and extension, which can drive the internal limit plate to perform linear reciprocating fluctuations, so that the pressure plate connected to it can perform elastic hammering motion on the sample through elastic hammering. In this way, the dynamic impact of flood impact or water flow fluctuation can be simulated more realistically, which helps to evaluate the strength, durability and crack resistance of concrete under dynamic pressure, especially the fatigue performance of the structure under long-term dynamic load.

[0007] Further optimized, as a specific structure of the elastic frame, the elastic frame includes a fixed plate and an upper plate, and the upper plate, the limiting plate and the fixed plate are sequentially spaced apart in the direction of the sample placement frame; The other end of the sliding rod slides through the fixed plate and is connected to the limit plate; the fixed plate is connected to one end of the second fixed rod, and the other end of the second fixed rod slides through the limit plate and the upper plate in sequence and extends outward for fixing; the upper plate is connected to one end of the first fixed rod, and the other end of the first fixed rod slides through the limit plate and extends outward; The sliding rod, the second fixed rod and the first fixed rod are all parallel to each other; a first spring is coaxially sleeved on the second fixed rod between the limit plate and the upper plate, and a second spring is coaxially sleeved on the portion of the first fixed rod extending from the limit plate. In this solution, the two elastic parts are respectively set as a first spring and a second spring, the first spring is located between the upper plate and the limit plate and is coaxially sleeved on the second fixed rod, and the second spring is coaxially sleeved on the first fixed rod, one end of which is connected to the limit plate and the other end is fixed to the large end of the first fixed rod; wherein the first fixed rod and the second fixed rod can preferably be two or more; during specific operation, the limit plate can reciprocate on the first fixed rod and the second fixed rod, and when the upper plate is driven to move by the second driving component, one end of the first spring and the second elastic force can move synchronously with the upper plate, so that the other end thereof applies elastic force to the reciprocating movement of the limit plate.

[0008] Further optimized, in order to combine the first drive component to perform preliminary pressure to simulate the impact force of the flood, the simulated dynamic impact component also includes a first drive component, the first drive component includes a first motor and a U-shaped slide, both sides of the U-shaped slide are slidably connected to the movable frame, and the first motor is used to drive the U-shaped slide to move away from or towards the sample placement frame; The other end of the second fixing rod is fixedly connected to the bottom edge of the U-shaped slide. In this solution, a U-shaped slide is provided, which serves as the main load-bearing component and is used for sliding connection with the movable frame; the elastic frame is connected to the U-shaped slide. Specifically, the end portion of the other end of the first fixing rod extending outward is connected to the U-shaped slide. In this way, when the U-shaped slide is driven to move back and forth by the first motor, the entire elastic frame can be driven to move toward the sample, so that the pressure plate can initially apply pressure to the concrete sample, simulating the force of flood impact, so as to detect various performance indicators of concrete, such as compressive strength, flexural strength and impact resistance, etc., which can be closer to actual application scenarios and ensure the durability and safety of concrete under extreme conditions.

[0009] Further optimization, in order to improve the accuracy of adjusting the pre-pressure force of the pressure plate, both sides of the movable rack are provided with a long sliding groove running through the inside and outside, and both sides of the U-shaped slide are slidably connected to a long sliding groove and extend out of the long sliding groove; the extended portion of the U-shaped slide is hinged to two side-by-side rotating rods, and both rotating rods extend toward the direction of the sample placement rack; Each side of the movable frame is provided with two mutually meshing pinions, each pinion being rotatably connected to the movable frame and connected to a pinion corresponding to the other side via a connecting rod for synchronous rotation; one end of each of the two rotating rods is eccentrically hinged to a corresponding pinion, and the two rotating rods are symmetrically arranged along a center line between the two pinions; The first motor is used to drive any one of the pinion gears to rotate. In this solution, the first motor drives any one of the pinion gears to rotate. Since the two pinion gears on the same side are meshed with each other, the two corresponding pinion gears on both sides rotate synchronously via the connecting rod. In this way, all four pinion gears can rotate synchronously. Since the end of the rotating rod is eccentrically connected to the pinion gear and both ends of the rotating rod are hinged, during the rotation of the pinion gear, one end of the rotating rod can be driven to rotate synchronously, so that the other end of the rotating rod applies a driving force to the U-shaped slide, thereby driving the U-shaped slide to reciprocate. This movement method can finely adjust the reciprocating position of the U-shaped slide to adjust the pressure of the pressure plate.

[0010] Further optimized, as a specific driving mode of the first driving assembly, the first driving assembly further includes a first limiting rod, a connecting seat and a first bevel gear set, the first limiting rod is rotatably connected to the supporting platform, and the first motor is used to drive the first limiting rod to rotate around its own axis; The connecting base is L-shaped, one side of the connecting base extends outward and is fixed to the movable frame, and the other side of the connecting base has a through hole, which is passed through by the first limiting rod; The first bevel gear set includes two meshing first bevel gears, one of which is rotatably connected to a side surface of the connecting seat and coaxially connected to an external main gear and rotates synchronously, and the main gear and the auxiliary gear are meshed with each other; Another first bevel gear is slidably mounted on the first limiting rod and can slide along the length of the first limiting rod and rotate synchronously with the first limiting rod; the first bevel gear is rotatably connected to the other side surface of the connecting seat. In this solution, because the diameter of the through hole is larger than the diameter of the first limiting rod and a sliding bar is provided on the first limiting rod to limit the first bevel gear, the displacement of the movable frame is not affected during the process of the first motor driving the first limiting rod to rotate; the rotation of the first limiting rod can synchronously drive the rotation of one first bevel gear, and can in turn drive the rotation of the other bevel gear and the main gear to drive the rotation of the secondary gear.

[0011] Further optimization, in order to stabilize the regulation and improve the pressure regulation accuracy during reciprocating fluctuations, the second drive assembly includes a second motor, an L-shaped connecting rod and a rotating plate. Mounting plates are fixed on both sides of the bottom edge of the U-shaped slide. An L-shaped connecting rod is provided on each of the two mounting plates. The horizontal rods of the two L-shaped connecting rods are arranged facing each other, and the vertical rods are parallel to each other; a gap is left between the vertical rods of the two L-shaped connecting rods. One end of the rotating plate extends between the two vertical rods and is hinged to the two vertical rods; the other end of the rotating plate is connected to one end of the rod, and the other end of the rod slides through the bottom edge of the U-shaped slide and is fixed to the upper plate; The second motor is used to drive the rotation of any of the L-shaped connecting rods. In this solution, the L-shaped connecting rod is similar to a crankshaft. The horizontal rods of the two L-shaped connecting rods are located on the same horizontal line, with their ends facing each other. The vertical rods are parallel to each other with a gap, which facilitates synchronous drive and leaves space for the rotating plate to move. When the second motor drives the horizontal rod of the L-shaped connecting rod to rotate, it can also drive the two vertical rods to rotate synchronously, causing the ends of the rotating plate to perform circumferential rotational motion. This can drive the sliding movement of the U-shaped slide rod and the reciprocating movement of the elastic frame.

[0012] Further optimized, as a specific driving mode of the second driving assembly, the second driving assembly further includes a second limiting rod, a sliding seat and a second bevel gear set, the second limiting rod is rotatably connected to the support platform, and the second motor is used to drive the second limiting rod to rotate around its own axis; The sliding seat is L-shaped, one side of the sliding seat extends outward and is slidably connected to the slide groove on the support platform, and the slide groove is parallel to the second limiting rod; the other side of the sliding seat has a through hole, and the second limiting rod passes through it; The second bevel gear set includes two second bevel gears meshing with each other, wherein one of the second bevel gears is rotatably connected to a side surface of the sliding seat and is coaxially rotatably connected to the crossbar of the L-shaped connecting rod; Another second bevel gear is slidably sleeved on the second limiting rod and can slide along the length direction of the second limiting rod and can rotate synchronously with the second limiting rod; the second bevel gear is rotatably connected to the other side of the sliding seat. In this solution, a second limiting rod is also provided on the support platform, and the first limiting rod and the second limiting rod are parallel and respectively provided on both sides of the support platform; similarly, the diameter of the through hole there is larger than the diameter of the second limiting rod, and a sliding strip is provided on the second limiting rod so as not to affect the displacement of the mobile frame when the second limiting rod rotates; when the second motor drives the second limiting rod to rotate, a second bevel gear rotates synchronously and drives the other second bevel gear to rotate in turn, and the second bevel gear is connected to the sliding seat and the L-shaped connecting rod through the bearing, thereby driving the L-shaped connecting rod to rotate around its own axis.

[0013] Further optimization is carried out, in order to simultaneously apply pressure and elastic hammering at both ends of the sample, a movable rack is provided on both sides of the sample rack, and the two movable racks are slidably connected to the support platform and can move closer to or away from each other; the sample rack is U-shaped with the opening facing upward, and the side wall of the sample rack is open toward the movable rack.

[0014] Further optimization is that in order to manually drive the two mobile racks to move synchronously toward each other, the support platform is further rotatably connected to a bidirectional screw, and the threads at both ends of the bidirectional screw are respectively threadedly connected to one of the mobile racks, and are used to drive the mobile racks to move away from or towards the sample placement rack; Both ends of the bidirectional screw are rotatably connected to the support platform; and one end of the bidirectional screw extends out of the support platform and is connected to a knob.

[0015] As a further optimization, in order to detect the applied pressure, a plurality of test heads for detecting the pressure are fixed at the bottom of the pressure plate; and a strength test controller electrically connected to the test heads is also provided on the support platform.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects: The first gear is driven by the first gear of the driving member and the second gear is driven by the first gear of the driving member, and the driving member is driven by the second gear of the driving member. 2. A concrete quality detection device for water conservancy projects provided by the present invention, wherein when the second motor is in operation, it drives the second bevel gear set on the top of the sliding seat to transmit, thereby causing the L-shaped connecting rod to rotate synchronously, so that while the rotating plate reciprocates in the horizontal direction of the support platform, the two ends of the rotating plate rotate relative to the L-shaped connecting rod and the upper plate, thereby causing the upper plate to perform linear reciprocating motion on the second fixed rod. During the linear reciprocating motion of the upper plate on the second fixed rod, the first spring is deformed, performing contraction and extension reciprocating motion, thereby driving the limit plate to also perform linear reciprocating motion on the second fixed rod, causing the second spring to deform, performing extension and contraction reciprocating motion, further, causing the limit plate to drive the sliding rod to perform elastic hammering motion on the fixed plate, causing the test head and the pressure plate to move synchronously with the sliding rod, and the pressure plates and the test head on both sides of the support platform perform elastic hammering motion on the side walls of the concrete sample, which can more realistically simulate the dynamic impact of flood impact or water flow fluctuation, test the performance of concrete in complex environments, and thus provide more accurate predictions for engineering design; 3. The present invention provides a concrete quality testing device for water conservancy projects. By employing a pseudo-dynamic impact component, it can simulate dynamic loads such as water flow impact, fluctuations, and pressure changes. This device better reflects the stress state of concrete in real water conservancy environments than static pressure testing. Furthermore, it can detect the fatigue properties of concrete under alternating stresses and detect microcracks or structural weaknesses that are difficult to detect in static testing. Its dynamic load can rapidly apply multi-directional, multi-frequency composite stresses, shortening the testing cycle. Furthermore, dynamic response data can be used to guide concrete formulations to improve impact resistance and durability. Dynamic performance evaluation can screen for high-quality concrete that is resistant to fatigue and erosion, extending structural maintenance cycles, ensuring that concrete meets strength requirements under long-term water flow impact, and reducing the risk of collapse in water conservancy facilities. 4. The present invention provides a concrete quality detection device for water conservancy projects, which can provide a more scientific data basis for the proportion of concrete and the selection of raw materials. By analyzing the performance of concrete with different proportions under dynamic loads, engineers can adjust the formula to improve the impact resistance and fatigue resistance of concrete, thereby improving the stability and reliability of the overall structure. It can also simulate the situation where concrete is affected by dynamic pressure over a long period of time. Through these experiments, it is possible to predict the deterioration phenomena that may occur in concrete during future use, such as the expansion of microcracks and reduced durability, providing data support for maintenance and repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the examples. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be considered as limiting the scope. A person of ordinary skill in the art can also derive other relevant drawings based on these drawings without inventive effort. In the drawings: Figure 1 This is an axial schematic diagram of the concrete quality detection device provided by the present invention in the first direction; Figure 2 This is a schematic axial view of the concrete quality detection device provided by the present invention in the second direction; Figure 3 This is a schematic axial view of the concrete quality detection device provided by the present invention in the third direction; Figure 4 This is a schematic axial view of the concrete quality detection device provided by the present invention in the fourth direction; Figure 5 This is an axial schematic diagram of the pseudo-dynamic impact assembly provided by the present invention in the first direction; Figure 6 This is a schematic axial view of the second direction of the pseudo-dynamic impact assembly provided by the present invention; Figure 7This is a schematic axial view of the third direction of the pseudo-dynamic impact assembly provided by the present invention; Figure 8 The present invention provides Figure 2 Enlarged view of point A in the middle; Figure 9 The present invention provides Figure 2 Enlarged view of point B in the middle; Figure 10 The present invention provides Figure 4 Enlarged view of point C in the middle.

[0018] Markings and corresponding parts names in the accompanying drawings: 2-pseudo-dynamic impact assembly, 11-support platform, 12-sample placement rack, 13-bidirectional screw, 14-strength test controller, 15-knob, 16-movable rack, 21-U-shaped slide, 22-first fixed rod, 23-limiting plate, 24-second fixed rod, 25-first spring, 26-second spring, 27-upper plate, 28-sliding rod, 29-fixed plate, 210-pressing plate, 211-test head, 212-rotating plate, 213-L-shaped connecting rod, 214-connecting plate, 215-rotating rod, 216-second gear, 217-connecting rod, 218-connecting seat, 219-main gear, 220-first bevel gear set, 221-first limiting rod, 222-slide groove, 223-sliding seat, 224-second bevel gear set, 225-second limiting rod, 226-first motor, 227-second motor. DETAILED DESCRIPTION

[0019] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with examples and drawings. The exemplary embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0020] Example 1: This example 1 provides a concrete quality detection device for water conservancy projects, such as Figure 1-Figure 5 As shown, including: A support platform 11, on which a sample holder 12 is fixed, and a movable frame 16 is slidably connected, and the movable frame 16 can move in a direction away from or close to the sample holder 12; A pseudo-dynamic impact assembly 2 is provided on the mobile frame 16; the pseudo-dynamic impact assembly 2 includes a second drive assembly, an elastic frame and a pressure plate 210, the elastic frame includes a limiting plate 23, and the limiting plate 23 can slide in the elastic frame toward the sample placement rack 12; The front and rear sides of the limiting plate 23 are respectively provided with two elastic parts, the elastic force directions of the two elastic parts are both toward the sample placement rack 12, and the ends of the two elastic parts away from the limiting plate 23 are fixed to the elastic frame; the pressing plate 210 is located on the side of the elastic frame facing the sample placement rack 12, the pressing plate 210 is connected to one end of the sliding rod 28, and the other end of the sliding rod 28 slides into the elastic frame and is connected to the limiting plate 23; The second driving assembly is used to drive the elastic frame to perform reciprocating motion toward the sample placement rack 12 ; and during the movement of the elastic frame, both of the two elastic parts can apply elastic force to the limiting plate 23 .

[0021] Compared with the problem in the prior art that it is unable to simulate the dynamic loads and fluctuating pressures commonly seen in actual projects, the present invention provides a concrete quality detection device for water conservancy projects. By adopting this solution, by using a pseudo-dynamic impact component 2, it is simulated that concrete will be subjected to the impact, fluctuation and pressure changes from the water flow in water conservancy projects, which can more accurately test the fatigue resistance, impact resistance and durability of concrete, and help evaluate its strength changes under long-term use. The specific scheme includes a support platform 11, a sample placement rack 12 for fixing the sample is provided on the support platform 11, and a mobile rack 16 that can move toward the sample, and a pseudo-dynamic impact component 2 is provided on the mobile rack 16 to drive the pressure plate 210 to reciprocate and impact the sample; wherein, the pseudo-dynamic impact component 2 includes a second driving component, an elastic frame and a pressure plate 210, wherein the pressure plate 210 is connected to one end of the slide rod 28, and the other end of the slide rod 28 slides into the elastic frame and is connected to the limit plate 23, at which time the slide rod 28 can slide along its own length direction; during specific operation, it can first be moved toward the sample placement rack 12 through the mobile rack 16 so that the pressure plate 210 is initially pressed on the sample , and then start the second driving component to drive the elastic frame to perform reciprocating motion. During its reciprocating motion, since the internal limit plate 23 can slide freely, and the other ends of the two elastic parts can move synchronously with the elastic frame, the two elastic parts can simultaneously perform reciprocating motion of contraction and extension, which can drive the internal limit plate 23 to perform linear reciprocating fluctuations, so that the pressure plate 210 connected thereto can perform elastic hammering motion on the sample through elastic hammering. In this way, the dynamic impact of flood impact or water flow fluctuation can be more realistically simulated, which helps to evaluate the strength, durability and crack resistance of concrete under dynamic pressure, especially to test the fatigue performance of the structure under long-term dynamic load.

[0022] In this embodiment, as a specific structure of an elastic frame, the elastic frame includes a fixed plate 29 and an upper plate 27, and the upper plate 27, the limiting plate 23 and the fixed plate 29 are sequentially spaced apart in the direction of the sample placement rack 12; The other end of the sliding rod 28 slides through the fixed plate 29 and is connected to the limit plate 23; the fixed plate 29 is connected to one end of the second fixed rod 24, and the other end of the second fixed rod 24 slides through the limit plate 23 and the upper plate 27 in sequence and extends outward for fixation; the upper plate 27 is connected to one end of the first fixed rod 22, and the other end of the first fixed rod 22 slides through the limit plate 23 and extends outward; The sliding rod 28, the second fixed rod 24 and the first fixed rod 22 are all parallel to each other; a first spring 25 is coaxially sleeved on the second fixed rod 24 between the limit plate 23 and the upper plate 27, and a second spring 26 is coaxially sleeved on the part of the first fixed rod 22 extending out of the limit plate 23. In this solution, the two elastic parts are respectively set as a first spring 25 and a second spring 26. The first spring 25 is located between the upper plate 27 and the limit plate 23, and is coaxially sleeved on the second fixing rod 24. The second spring 26 is coaxially sleeved on the first fixing rod 22, one end of which is connected to the limit plate 23, and the other end is fixed to the large end of the first fixing rod 22; wherein the first fixing rod 22 and the second fixing rod 24 can preferably be two or more; during specific operation, the limit plate 23 can slide back and forth on the first fixing rod 22 and the second fixing rod 24. When the upper plate 27 is driven to move by the second driving assembly, one end of the first spring 25 and the second spring can move synchronously with the upper plate 27, so that the other end of itself exerts an elastic force on the reciprocating movement of the limit plate 23.

[0023] Example 2: This example 2 is further optimized based on example 1, and provides a specific structure of a first driving component, such as Figure 5-Figure 9 shown.

[0024] In this embodiment, in order to combine the first drive assembly to perform preliminary pressure to simulate the impact force of the flood, the simulated dynamic impact assembly 2 further includes a first drive assembly, which includes a first motor 226 and a U-shaped slide 21. Both sides of the U-shaped slide 21 are slidably connected to the movable frame 16, and the first motor 226 is used to drive the U-shaped slide 21 to move away from or toward the sample placement rack 12. The other end of the second fixing rod 24 is fixedly connected to the bottom edge of the U-shaped slide 21. In this solution, a U-shaped slide 21 is provided, and the U-shaped slide 21 serves as the main load-bearing component and is used for sliding connection with the movable frame 16; the elastic frame is connected to the U-shaped slide 21. Specifically, the end portion extending outward from the other end of the first fixing rod 22 is connected to the U-shaped slide 21. In this way, when the U-shaped slide is driven to move back and forth by the first motor 226, the entire elastic frame can be driven to move toward the sample, so that the pressing plate 210 initially applies pressure to the concrete sample, simulating the force of flood impact, so as to detect various performance indicators of concrete, such as compressive strength, flexural strength and impact resistance, etc., which can be closer to actual application scenarios and ensure the durability and safety of concrete under extreme conditions.

[0025] In this embodiment, in order to improve the accuracy of the pre-pressure force of the adjustment plate 210, both sides of the movable frame 16 are provided with a long sliding groove running through the inside and outside, and both sides of the U-shaped slide 21 are slidably connected to a long sliding groove and extend out of the long sliding groove; the extended portion of the U-shaped slide 21 is hinged to two side-by-side rotating rods 215, and both rotating rods 215 extend toward the direction of the sample placement rack 12; Each side of the mobile frame 16 is provided with two mutually meshing pinions 216, each pinion 216 being rotatably connected to the mobile frame 16 and connected to a pinion 216 on the other side via a connecting rod 217 for synchronous rotation; one end of each of the two rotating rods 215 is eccentrically hinged to a corresponding pinion 216, and the two rotating rods 215 are symmetrically arranged along the midline between the two pinions 216; The first motor 226 is used to drive any one of the pinion gears 216 to rotate. In this solution, any one of the pinion gears 216 is driven to rotate by the first motor 226. Since the two pinion gears 216 on the same side are meshed with each other, and the two pinion gears 216 corresponding to the two sides rotate synchronously through the connecting rod 217, the four pinion gears 216 can all rotate synchronously. Since the end of the rotating rod 215 is eccentrically connected to the pinion gear 216, and both ends of the rotating rod 215 are hinged, during the rotation of the pinion gear 216, one end of the rotating rod 215 can be driven to rotate synchronously, so that the other end of the rotating rod 215 applies a driving force to the U-shaped slide 21, thereby driving the U-shaped slide 21 to reciprocate. This movement mode can finely adjust the reciprocating position of the U-shaped slide 21 to adjust the pressure of the pressure plate 210.

[0026] In this embodiment, as a specific driving mode of the first driving assembly, the first driving assembly further includes a first limiting rod 221, a connecting seat 218 and a first bevel gear set 220. The first limiting rod 221 is rotatably connected to the supporting platform 11, and the first motor 226 is used to drive the first limiting rod 221 to rotate around its own axis. The connecting seat 218 is L-shaped, one side of the connecting seat 218 extends outward and is fixed to the movable frame 16, and the other side of the connecting seat 218 has a through hole, which is passed through by the first limiting rod 221; The first bevel gear set 220 includes two meshing first bevel gears, one of which is rotatably connected to a side surface of the connecting seat 218 and coaxially connected to an external main gear 219 and rotates synchronously, and the main gear 219 and the auxiliary gear 216 are meshed with each other; Another first bevel gear is slidably mounted on the first limiting rod 221 and can slide along the length of the first limiting rod 221 and rotate synchronously with the first limiting rod 221; the first bevel gear is rotatably connected to the other side of the connecting seat 218. In this solution, since the diameter of the through hole is larger than that of the first limiting rod 221 and a sliding bar is provided on the first limiting rod 221 to limit the first bevel gear, the displacement of the movable frame 16 is not affected during the process of the first motor 226 driving the first limiting rod 221 to rotate; the rotation of the first limiting rod 221 can synchronously drive the rotation of one first bevel gear, and can in turn drive the rotation of the other bevel gear and the main gear 219 to drive the rotation of the secondary gear 216.

[0027] Embodiment 3: This embodiment 3 is further optimized on the basis of embodiment 1 or embodiment 2, and provides a specific structure of a second driving component, such as Figure 5-Figure 7 、 Figure 10 shown.

[0028] In this embodiment, in order to stabilize the regulation and improve the pressure regulation accuracy during reciprocating fluctuations, the second drive assembly includes a second motor 227, an L-shaped connecting rod 213 and a rotating plate 212. Mounting plates are fixed on both sides of the bottom edge of the U-shaped slide 21. An L-shaped connecting rod 213 is provided on each of the two mounting plates. The horizontal rods of the two L-shaped connecting rods 213 are arranged facing each other, and the vertical rods are parallel to each other; a gap is left between the vertical rods of the two L-shaped connecting rods 213. One end of the rotating plate 212 extends between the two vertical rods and is hinged to the two vertical rods; the other end of the rotating plate 212 is connected to one end of the rod, and the other end of the rod slides through the bottom edge of the U-shaped slide 21 and is fixed to the upper plate 27; The second motor 227 is used to drive the rotation of any of the L-shaped connecting rods 213. In this embodiment, the L-shaped connecting rod 213 is similar to a crankshaft. The crossbars of the two L-shaped connecting rods 213 are located on the same horizontal line, with their ends facing each other. The vertical rods are parallel to each other with a gap, facilitating synchronous drive and leaving space for the rotation plate 212 to move. When the second motor 227 drives the crossbar of the L-shaped connecting rod 213 to rotate, it can also simultaneously drive the two vertical rods to rotate, causing the ends of the rotation plate 212 to perform circumferential rotational motion. In this way, it can drive the rod member sliding through the U-shaped slide 21 to move, and drive the elastic frame to reciprocate.

[0029] In this embodiment, as a specific driving mode of the second driving assembly, the second driving assembly further includes a second limiting rod 225, a sliding seat 223 and a second bevel gear set 224. The second limiting rod 225 is rotatably connected to the support platform 11, and the second motor 227 is used to drive the second limiting rod 225 to rotate around its own axis. The sliding seat 223 is L-shaped, with one side of the sliding seat 223 extending outward and slidingly connected to the slide groove 222 on the support platform 11. The slide groove 222 is parallel to the second limiting rod 225. The other side of the sliding seat 223 has a through hole, which is passed through by the second limiting rod 225. The second bevel gear set 224 includes two second bevel gears meshing with each other, wherein one of the second bevel gears is rotatably connected to a side surface of the sliding seat 223 and is coaxially rotatably connected to the crossbar of the L-shaped connecting rod 213; Another second bevel gear is slidably sleeved on the second limiting rod 225 and can slide along the length direction of the second limiting rod 225 and can rotate synchronously with the second limiting rod 225; the second bevel gear is rotatably connected to the other side of the sliding seat 223. In this solution, a second limiting rod 225 is also provided on the support platform 11, and the first limiting rod 221 and the second limiting rod 225 are parallel and respectively provided on both sides of the support platform 11; similarly, the diameter of the through hole there is larger than the diameter of the second limiting rod 225, and a sliding bar is provided on the second limiting rod 225 so as not to affect the displacement of the moving frame 16 when the second limiting rod 225 rotates; when the second motor 227 drives the second limiting rod 225 to rotate, one second bevel gear rotates synchronously and drives the other second bevel gear to rotate in turn, and the second bevel gear is connected to the sliding seat 223 and the L-shaped connecting rod 213 through the bearing, thereby driving the L-shaped connecting rod 213 to rotate around its own axis.

[0030] Example 4: This example 4 is further optimized based on examples 1-3, and also provides a technical means for bidirectional testing of samples, such as Figures 1-4 shown.

[0031] In this embodiment, in order to apply pressure and elastic hammering at both ends of the sample at the same time, a movable rack 16 is provided on both sides of the sample rack 12, and the two movable racks 16 are slidably connected to the support platform 11 and can move closer to or away from each other; the sample rack 12 is U-shaped with the opening facing upward, and the side wall of the sample rack 12 is open toward the movable rack 16.

[0032] In this embodiment, in order to manually drive the two mobile racks 16 to move synchronously toward each other, a bidirectional screw 13 is rotatably connected to the support platform 11. The threads at both ends of the bidirectional screw 13 are respectively threadedly connected to one of the mobile racks 16, and are used to drive the mobile racks 16 to move away from or toward the sample placement rack 12; Both ends of the bidirectional screw 13 are rotatably connected to the support platform 11 ; and one end of the bidirectional screw 13 extends out of the support platform 11 and is connected to a knob 15 .

[0033] In this embodiment, in order to detect the applied pressure, a plurality of test heads 211 for detecting the pressure are fixed to the bottom of the pressing plate 210 ; a strength test controller 14 electrically connected to the test heads 211 is also provided on the support platform 11 .

[0034] The specific working principle of this solution is: After the solidified concrete sample is placed on the sample placement rack 12, at this time, the connection between the rotating rod 215 and the pinion 216 is located on the side away from the pressing plate 210, and the rotating knob 15 drives the bidirectional screw 13 to rotate, so that the two movable racks 16 and their internal components move in opposite directions, so that the pressing plate 210 and the test head 211 are in contact with the side wall of the concrete sample.

[0035] When the moving frame 16 is moving, the first limiting rod 221 on the top of the moving frame 16 slides relative to the bevel gear in the first bevel gear set 220, and the moving frame 16 drives the sliding seat 223 on the other side and its top component to slide in the slide groove 222. At the same time, the second limiting rod 225 slides relative to the bevel gear in the second bevel gear set 224, and the pressure plate 210 moves with the moving frame 16, and the wire connected to its top is flexibly bent, and then, through the operation strength test controller 14, the first motor 226 and the second motor 227 are operated simultaneously.

[0036] When the first motor 226 is running, the first limiting rod 221 can be rotated, thereby driving the first bevel gear set 220 on one side of the connecting seat 218 to transmit, thereby prompting the main gear 219 to rotate, driving the two sub-gears 216 at its bottom to rotate in opposite directions. Since the rotating rod 215 is located at the eccentric point of the sub-gear 216, when the sub-gear 216 rotates, the rotating rod 215 follows the sub-gear 216 to produce orbital revolution, and the rotating rod 215 and the sub-gear 216 produce relative rotation, thereby pushing the connecting plate 214 to perform horizontal reciprocating motion on the horizontal plane of the support platform 11, prompting the U-shaped slide 21 fixedly connected to one side of the connecting plate 214 and its connecting components to perform horizontal reciprocating linear motion in the moving frame 16.

[0037] When the second motor 227 is running, it drives the second bevel gear set 224 on the top of the sliding seat 223 to transmit, so that the L-shaped connecting rod 213 rotates synchronously, so that the rotating plate 212 reciprocates in the horizontal direction of the support platform 11. At the same time, the two ends of the rotating plate 212 rotate relative to the L-shaped connecting rod 213 and the upper plate 27, thereby prompting the upper plate 27 to perform linear reciprocating motion on the second fixed rod 24. During the linear reciprocating motion of the upper plate 27 on the second fixed rod 24, the first spring 25 is deformed, performing contraction and extension reciprocating motion, thereby driving the limiting plate 23 to also perform linear reciprocating motion on the second fixed rod 24, causing the second spring 26 to deform, performing extension and contraction reciprocating motion, further, causing the limiting plate 23 to drive the sliding rod 28 on the fixed plate 29 to perform elastic hammering motion, prompting the test head 211 and the pressure plate 210 to move synchronously with the sliding rod 28.

[0038] The pressure plates 210 and the test heads 211 on both sides of the support platform 11 perform elastic hammering motion on the side walls of the concrete sample, simulating flood impact or water flow fluctuations, helping to evaluate the strength, durability and crack resistance of the concrete under dynamic pressure, especially for testing the fatigue performance of the structure under long-term dynamic loads.

[0039] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A concrete quality detection device for water conservancy projects, characterized in that: include: A supporting platform (11) is fixed with a sample placement rack (12) and is slidably connected with a movable rack (16), wherein the movable rack (16) can move in a direction away from or toward the sample placement rack (12); A pseudo-dynamic impact assembly (2) is provided on the movable frame (16); the pseudo-dynamic impact assembly (2) comprises a second driving assembly, an elastic frame and a pressure plate (210); a limiting plate (23) is further provided in the elastic frame, and the limiting plate (23) can slide in the elastic frame toward the sample placement frame (12); The front and rear sides of the limiting plate (23) are respectively provided with two elastic parts, the elastic force directions of the two elastic parts are both in the direction of the sample placement rack (12), and the ends of the two elastic parts away from the limiting plate (23) are fixed to the elastic frame; the pressing plate (210) is located on the side of the elastic frame facing the sample placement rack (12), the pressing plate (210) is connected to one end of the sliding rod (28), and the other end of the sliding rod (28) slides into the elastic frame and is connected to the limiting plate (23); The second driving component is used to drive the elastic frame to perform reciprocating motion in the direction of the sample placement frame (12); and during the movement of the elastic frame, both of the elastic parts can exert elastic force on the limiting plate (23).

2. A concrete quality detection device for water conservancy projects according to claim 1, characterized in that: The elastic frame includes a fixed plate (29) and an upper plate (27), and the upper plate (27), the limiting plate (23) and the fixed plate (29) are sequentially spaced apart in the direction of the sample placement frame (12); The other end of the sliding rod (28) slides through the fixed plate (29) and is connected to the limiting plate (23); the fixed plate (29) is connected to one end of the second fixing rod (24), and the other end of the second fixing rod (24) slides through the limiting plate (23) and the upper plate (27) in sequence and extends outward for fixing; the upper plate (27) is connected to one end of the first fixing rod (22), and the other end of the first fixing rod (22) slides through the limiting plate (23) and extends outward; The sliding rod (28), the second fixing rod (24) and the first fixing rod (22) are all parallel to each other; a first spring (25) is coaxially sleeved on the second fixing rod (24) between the limiting plate (23) and the upper plate (27), and a second spring (26) is coaxially sleeved on the portion of the first fixing rod (22) extending out of the limiting plate (23).

3. A concrete quality detection device for water conservancy projects according to claim 2, characterized in that: The simulated dynamic impact assembly (2) further includes a first drive assembly, the first drive assembly including a first motor (226) and a U-shaped slide (21), both sides of the U-shaped slide (21) are slidably connected to the movable frame (16), and the first motor (226) is used to drive the U-shaped slide (21) to move in a direction away from or close to the sample placement frame (12); The other end of the second fixing rod (24) is fixedly connected to the bottom edge of the U-shaped slide plate (21).

4. A concrete quality detection device for water conservancy projects according to claim 3, characterized in that: Both sides of the movable rack (16) are provided with long sliding grooves that pass through the inside and outside, and both sides of the U-shaped slide plate (21) are slidably connected to a long sliding groove and extend out of the long sliding groove; the extended portion of the U-shaped slide plate (21) is hinged to two parallel rotating rods (215), and the two rotating rods (215) extend toward the direction of the sample placement rack (12); Both sides of the movable frame (16) are provided with two mutually meshing pinions (216), the pinions (216) being rotatably connected to the movable frame (16) and connected to a pinion (216) on the other side via a connecting rod (217) so as to rotate synchronously; one end of each of the two rotating rods (215) is eccentrically hinged to a corresponding pinion (216), and the two rotating rods (215) are symmetrically arranged along a center line between the two pinions (216); The first motor (226) is used to drive any one of the sub-gears (216) to rotate.

5. A concrete quality detection device for water conservancy projects according to claim 4, characterized in that: The first driving assembly further comprises a first limiting rod (221), a connecting seat (218) and a first bevel gear set (220), wherein the first limiting rod (221) is rotatably connected to the supporting platform (11), and the first motor (226) is used to drive the first limiting rod (221) to rotate around its own axis; The connecting seat (218) is L-shaped, one side of the connecting seat (218) extends outward and is fixed to the movable frame (16), and the other side of the connecting seat (218) has a through hole and is passed through by the first limiting rod (221); The first bevel gear set (220) includes two meshing first bevel gears, one of which is rotatably connected to a side surface of the connecting seat (218) and coaxially connected to an external main gear (219) and rotates synchronously, and the main gear (219) and the auxiliary gear (216) are meshed with each other; Another first bevel gear is slidably sleeved on the first limiting rod (221) and can slide along the length direction of the first limiting rod (221) and can rotate synchronously with the first limiting rod (221); the first bevel gear is rotatably connected to the other side surface of the connecting seat (218).

6. A concrete quality detection device for water conservancy projects according to claim 3, characterized in that: The second driving assembly comprises a second motor (227), an L-shaped connecting rod (213) and a rotating plate (212); mounting plates are fixed on both sides of the bottom edge of the U-shaped slide plate (21); an L-shaped connecting rod (213) is provided on each of the two mounting plates; the horizontal rods of the two L-shaped connecting rods (213) are arranged facing each other, and the vertical rods are parallel to each other; a gap is left between the vertical rods of the two L-shaped connecting rods (213); One end of the rotating plate (212) extends between the two vertical rods and is hinged to the two vertical rods; the other end of the rotating plate (212) is connected to one end of the rod, and the other end of the rod slides through the bottom edge of the U-shaped slide plate (21) and is fixed to the upper plate (27); The second motor (227) is used to drive any one of the L-shaped connecting rods (213) to rotate.

7. A concrete quality detection device for water conservancy projects according to claim 6, characterized in that: The second driving assembly further includes a second limiting rod (225), a sliding seat (223) and a second bevel gear set (224); the second limiting rod (225) is rotatably connected to the supporting platform (11); and the second motor (227) is used to drive the second limiting rod (225) to rotate around its own axis; The sliding seat (223) is L-shaped, one side of the sliding seat (223) extends outward and is slidably connected to the sliding groove (222) on the supporting platform (11), and the sliding groove (222) is parallel to the second limiting rod (225); the other side of the sliding seat (223) has a through hole, and is passed through by the second limiting rod (225); The second bevel gear set (224) comprises two second bevel gears meshing with each other, wherein one of the second bevel gears is rotationally connected to a side surface of the sliding seat (223) and is coaxially rotationally connected to the crossbar of the L-shaped connecting rod (213); Another second bevel gear is slidably sleeved on the second limiting rod (225) and can slide along the length direction of the second limiting rod (225) and can rotate synchronously with the second limiting rod (225); the second bevel gear is rotatably connected to the other side surface of the sliding seat (223).

8. A concrete quality detection device for water conservancy projects according to any one of claims 1 to 7, characterized in that: A movable rack (16) is provided on both sides of the sample placement rack (12), and the two movable racks (16) are slidably connected to the support platform (11) and can move closer to or away from each other; the sample placement rack (12) is U-shaped with an opening facing upward, and the side wall of the sample placement rack (12) is open toward the movable rack (16).

9. A concrete quality detection device for water conservancy projects according to claim 8, characterized in that: The support platform (11) is also rotatably connected to a bidirectional screw (13), and the threads at both ends of the bidirectional screw (13) are respectively threadedly connected to one of the movable racks (16), and are used to drive the movable rack (16) to move in a direction away from or close to the sample placement rack (12); Both ends of the bidirectional screw (13) are rotatably connected to the support platform (11); and one end of the bidirectional screw (13) extends out of the support platform (11) and is connected to a knob (15).

10. A concrete quality detection device for water conservancy projects according to any one of claims 1 to 7, characterized in that: A plurality of test heads (211) for detecting pressure are fixed to the bottom of the pressure plate (210); and a strength test controller (14) electrically connected to the test heads (211) is also provided on the support platform (11).

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