A concrete flexural performance detection device

Abstract

The application provides a concrete breaking resistance detection equipment, which comprises a water tank, a loading assembly is arranged on the water tank, a bin body is arranged in the water tank, a first vertical linear actuator is arranged in the bin body, a mounting plate is arranged on the driving end of the first vertical linear actuator, a plurality of bases are respectively arranged on the mounting plate, support rollers are arranged on the upper portions of the bases, a plurality of first horizontal linear actuators are symmetrically arranged on the bases, clamping plates are arranged on the driving ends of the first horizontal linear actuators, a rotating assembly is arranged in the water tank, a plurality of water immersion assemblies are arranged on the rotating assembly, the water immersion assemblies comprise a frame plate and a plurality of bearing plates, the frame plate is arranged on the rotating assembly, the plurality of bearing plates are respectively arranged on the frame plate, first through grooves are formed in the bearing plates, a plurality of clamping grooves are symmetrically formed in the inner walls of the first through grooves, and the clamping plates are detachably connected with the clamping grooves. Thus, the concrete underwater maintenance and detection integration can be realized, the error damage caused by transfer can be avoided, and the batch detection efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of concrete testing technology, and in particular to a device for testing the flexural properties of concrete. Background Technology

[0002] As the most widely used building material in the field of civil engineering, concrete's flexural strength is one of the core indicators for evaluating structural safety and durability, directly determining the service life and reliability of engineering structures such as bridges, dams, ports, and underground utility tunnels that are in water or humid environments for extended periods.

[0003] In related technologies, concrete typically requires immersion curing before being transferred to the testing machine. During this process, environmental temperature, humidity, wind speed, and transfer time can affect the test results, causing them to deviate from actual working conditions. Furthermore, the specimens are prone to collisions and impacts during transfer, generating micro-cracks that are difficult to detect with the naked eye. This can lead to premature fracture of the specimens under loading, further reducing the accuracy of the test data. In addition, concrete flexural strength testing is a destructive test. The loading process generates a large amount of high-speed flying cement debris and aggregate fragments, which not only contaminates the surrounding environment of the testing platform and the ground but also poses a safety hazard of injury from debris. Manual cleaning of the test area is required after each test, limiting the efficiency of batch testing and failing to meet the timeliness requirements of large-scale engineering testing. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the above-mentioned technologies.

[0005] Therefore, the purpose of this invention is to provide a concrete flexural performance testing device that can integrate underwater curing and testing of concrete, avoid errors and damage caused by transfer, eliminate the risk of debris, and improve the efficiency of batch testing.

[0006] To achieve the above objectives, the present invention proposes a concrete flexural strength testing device, comprising: a water tank, on which a loading component is provided;

[0007] A chamber is disposed inside the water tank, and a first vertical linear actuator is disposed inside the chamber.

[0008] The mounting plate is installed on the drive end of the first vertical linear actuator;

[0009] Multiple bases are respectively set on the mounting plate. A support roller is provided on the upper part of the base, and multiple first horizontal linear actuators are symmetrically arranged on the base. A clamping plate is provided on the drive end of the first horizontal linear actuator.

[0010] A rotating assembly is disposed inside the water tank, and the rotating assembly is provided with multiple immersion assemblies. The rotating assembly is used to drive the multiple immersion assemblies to rotate inside the water tank.

[0011] The immersion assembly is disposed between the loading assembly and the chamber. The immersion assembly includes a frame plate and multiple load-bearing plates. Multiple bases correspond one-to-one with the multiple load-bearing plates. The frame plate is disposed on the rotating assembly. The multiple load-bearing plates are respectively disposed on the frame plate. The load-bearing plates have a first through groove for the bases to pass through. Multiple slots are symmetrically provided on the inner wall of the first through groove. Multiple first horizontal linear actuators are configured to drive the multiple slots to be detachably connected to the multiple slots respectively.

[0012] In one embodiment of the present invention, two limiting grooves are symmetrically formed on the frame plate, and an electromagnet is provided in the limiting groove. Two limiting sliders are symmetrically formed on the load-bearing plate. The two limiting sliders are slidably connected to the two limiting grooves respectively, and the limiting sliders are magnetically connected to the electromagnet.

[0013] In one embodiment of the present invention, the mounting plate is provided with a plurality of second horizontal linear actuators, and the plurality of bases are respectively disposed on the drive ends of the plurality of second horizontal linear actuators.

[0014] In one embodiment of the present invention, the immersion assembly further includes: two first clamping members and two second clamping members. Each first clamping member includes: a third horizontal linear actuator, a first clamping plate, a plurality of first bidirectional pumps, a plurality of first inner oil bladders, and a plurality of first outer oil bladders. The plurality of first bidirectional pumps, the plurality of first inner oil bladders, and the plurality of first outer oil bladders correspond one-to-one. The third horizontal linear actuator is disposed on the frame plate, and the first clamping plate is disposed on the drive end of the third horizontal linear actuator. The first clamping plate is detachably connected to the sidewall of the concrete specimen. The first clamping plate has a plurality of first grooves. An outer oil bladder is disposed in the first groove, and a first cavity is formed in the first clamping plate. A plurality of first bidirectional pumps and a plurality of first inner oil bladders are respectively disposed in the first cavity. The first outer oil bladder is connected to the first oil port of the first bidirectional pump, and the first inner oil bladder is connected to the second oil port of the first bidirectional pump. Two first clamping members are symmetrically arranged about the first center line of the frame plate as an axis of symmetry, and two second clamping members are symmetrically arranged about the second center line of the frame plate as an axis of symmetry. The first center line and the second center line are orthogonal. The second clamping members and the first clamping members have the same structure.

[0015] In one embodiment of the present invention, a second through groove is provided on the outer wall of the silo, and a sieve frame is provided inside the silo, the sieve frame being inserted into the silo through the second through groove.

[0016] In one embodiment of the present invention, a first motor is provided on the drive end of the first vertical linear actuator, and the drive end of the first motor is connected to the side wall of the mounting plate; a second vertical linear actuator is provided in the chamber, and a first bearing seat is provided on the drive end of the second vertical linear actuator, and the first bearing seat is connected to the side wall of the mounting plate through a rotating shaft, wherein the axis of the drive end of the first motor is collinear with the axis of the rotating shaft.

[0017] In one embodiment of the present invention, the rotating assembly includes: a second bearing seat, a support shaft, a driven wheel, a second motor, and a driving wheel, wherein the support shaft is connected to the inner wall of the water tank through the second bearing seat, the driven wheel is disposed on the support shaft, the second motor is disposed on the upper inner wall of the water tank, the driving wheel is disposed on the drive end of the second motor, the driving wheel and the driven wheel mesh with each other, and the plurality of immersion components are respectively connected to the support shaft through a plurality of brackets.

[0018] In one embodiment of the present invention, the loading assembly includes: a frame, a press, and a loading head, wherein the frame is disposed on the upper part of the water tank, the press is disposed on the frame, and the loading head is disposed on the drive end of the press.

[0019] In one embodiment of the present invention, the water tank has an opening at the top, the opening being located below the loading assembly, and a third through groove is provided on the side wall of the water tank, with a gate valve disposed within the third through groove.

[0020] In one embodiment of the present invention, slide rails are respectively provided on the inner walls of both sides of the frame plate, and sliding blocks are respectively provided on both sides of the load-bearing plate. The two sliding blocks are slidably connected to the two slide rails respectively. A bellows cover is provided on both sides of the sliding block. One end of the bellows cover is connected to the sliding block, and the other end of the bellows cover is connected to the inner wall of the frame plate.

[0021] The beneficial effects of this invention are:

[0022] This technology enables integrated water immersion curing and flexural strength testing of concrete specimens without the need to transfer the specimens. It eliminates the interference of temperature and humidity fluctuations and micro-cracks caused by impacts during the transfer process on the test results, ensuring the accuracy of the test results.

[0023] During curing, the concrete specimen is placed on the load-bearing plate. During testing, the support roller passes through the first through groove to lift the concrete specimen, realizing the switch from surface contact curing to line contact testing. Through the detachable connection between the clamping plate and the clamping groove, the load-bearing plate and the base form an integral support structure, distributing the applied load to the frame plate of the rotating component and reducing the axial pressure of the first vertical linear actuator.

[0024] The rotating assembly enables the cyclic curing and continuous testing of multiple concrete specimens by rotating multiple sets of immersion components. Since the entire testing process is completed within the water tank, it effectively prevents test debris from splashing, reducing the safety hazard of debris injury. Because there is no need to clean up debris after each test, it eliminates the downtime caused by cleaning, significantly improving the efficiency of batch testing and meeting the timeliness requirements of large-scale engineering testing.

[0025] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0027] Figure 1 This is a schematic diagram of a concrete flexural strength testing device according to an embodiment of the present invention;

[0028] Figure 2 This is a cross-sectional structural schematic diagram of a concrete flexural performance testing device according to an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the connection structure between the support roller and the load-bearing plate according to an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the connection structure between the base and the frame plate according to an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of the structure of a water immersion assembly according to an embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of a water immersion assembly according to an embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram of the structure of a water immersion assembly according to another embodiment of the present invention;

[0034] Figure 8 This is a schematic diagram of the connection structure between the rotating assembly and the immersion assembly according to an embodiment of the present invention;

[0035] Figure 9 for Figure 6 A magnified view of part A in the middle;

[0036] Figure 10 for Figure 7 A magnified view of part B in the middle.

[0037] As shown in the figure: 1. Water tank; 2. Loading assembly; 21. Frame; 22. Press; 23. Loading head; 3. Chamber; 4. First vertical linear actuator; 5. Mounting plate; 6. Base; 7. Support roller; 8. First horizontal linear actuator; 9. Clamping plate; 10. Rotating assembly; 101. Second bearing seat; 102. Support shaft; 103. Driven wheel; 104. Second motor; 105. Drive wheel; 11. Immersion assembly; 111. Frame plate; 112. Load-bearing plate; 113. First through slot; 114. Clamping slot; 115. First clamping element; 1151. Third horizontal linear actuator; 1152. First clamping plate; 1153. First bidirectional pump; 1154. First inner oil bladder; 1155. First outer oil bladder. 1156. First groove, 1157. First cavity, 116. Second clamping element, 1161. Fourth horizontal linear actuator, 1162. Second clamping plate, 1163. Second bidirectional pump, 1164. Second inner oil bladder, 1165. Second outer oil bladder, 1166. Second groove, 1167. Second cavity, 12. Limiting slide, 13. Electromagnet, 14. Limiting slider, 15. Second horizontal linear actuator, 16. Second through groove, 17. Screen frame, 18. First motor, 19. Second vertical linear actuator, 201. First bearing seat, 202. Rotating shaft, 203. Bracket, 204. Slide rail, 205. Sliding block, 206. Bellows cover, 207. Third through groove, 208. Gate valve. Detailed Implementation

[0038] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0039] The concrete flexural strength testing equipment of the present invention is described below with reference to the accompanying drawings.

[0040] The concrete flexural performance testing equipment of this invention, such as... Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, it may include: a water tank 1, a chamber 3, a mounting plate 5, multiple bases 6, and a rotating assembly 10.

[0041] A loading assembly 2 is installed on the water tank 1. A chamber 3 is installed inside the water tank 1. A first vertical linear actuator 4 is installed inside the chamber 3. A mounting plate 5 is installed on the drive end of the first vertical linear actuator 4. Multiple bases 6 are respectively installed on the mounting plate 5. A support roller 7 is installed on the upper part of each base 6. Multiple first horizontal linear actuators 8 are symmetrically arranged on each base 6 (multiple mounting slots are symmetrically opened on the side walls of both sides of the base 6, and the multiple mounting slots correspond one-to-one with the multiple first horizontal linear actuators 8, and the first horizontal linear actuators 8 are installed in the mounting slots). A clamping plate 9 is installed on the drive end of each first horizontal linear actuator 8. The first horizontal linear actuator 8 is used to drive the clamping plate 9 to move horizontally.

[0042] It is understood that the first vertical linear actuator 4 described in this embodiment can drive the mounting plate 5 and the support roller 7 above it to rise and fall (move vertically), realizing the switch from "surface contact maintenance" to "line contact detection". After the first horizontal linear actuator 8 drives the clamping plate 9 to engage with the clamping slot 114, the load-bearing plate 112 and the base 6 form an integral support structure, which can distribute the load applied by the loading component 2 to the frame plate 111 of the rotating component 10, greatly reducing the axial pressure of the first vertical linear actuator 4 and improving the load-bearing stability and service life of the equipment.

[0043] The rotating assembly 10 is installed inside the water tank 1, and multiple immersion assemblies 11 are installed on the rotating assembly 10. The rotating assembly 10 is used to drive the multiple immersion assemblies 11 to rotate inside the water tank 1.

[0044] Furthermore, such as Figure 6 , Figure 7 , Figure 9 and Figure 10 As shown, the rotating assembly 10 may include: a second bearing seat 101, a support shaft 102, a driven wheel 103, a second motor 104, and a driving wheel 105. The support shaft 102 is connected to the inner wall of the water tank 1 through the second bearing seat 101. The driven wheel 103 is mounted on the support shaft 102. The second motor 104 is mounted on the upper inner wall of the water tank 1. The driving wheel 105 is mounted on the drive end of the second motor 104. The driving wheel 105 and the driven wheel 103 mesh with each other. Multiple immersion assemblies 11 are connected to the support shaft 102 through multiple brackets 203.

[0045] It is understood that, in this embodiment, the second motor 104 drives the driving wheel 105 (gear) to rotate, and the driving wheel 105 drives the driven wheel 103 (gear) to rotate through gear meshing. The rotating driven wheel 103 drives the support shaft 102 to rotate inside the water tank 1. The rotating support shaft 102 can simultaneously drive multiple immersion components 11 to rotate, switching the working position of the immersion components 11 and moving the immersion component 11 with detection to directly below the loading component 2. Through the parallel operation mode of one set of detection and multiple sets of curing, the waiting time for single concrete specimen detection is completely eliminated, and the efficiency of batch detection is greatly improved.

[0046] The immersion assembly 11 is disposed between the loading assembly 2 and the chamber 3. The immersion assembly 11 may include: a frame plate 111 and multiple load-bearing plates 112. Multiple bases 6 correspond one-to-one with multiple load-bearing plates 112. The frame plate 111 is disposed on the rotating assembly 10. Multiple load-bearing plates 112 are respectively disposed on the frame plate 111. A first through groove 113 is provided on the load-bearing plate 112 for the base 6 to pass through. Multiple slots 114 are symmetrically provided on the inner wall of the first through groove 113. Multiple first horizontal linear actuators 8 are configured to drive multiple slots 9 to be detachably connected to the multiple slots 114 respectively.

[0047] It is understood that the first horizontal linear actuator 8 described in this embodiment is detachably connected (clicked) to the slot 114 on the inner wall of the first through slot 113, which allows the load-bearing plate 112 and the base 6 to form an integral support structure, distributing the test load applied by the loading component 2 to the frame plate 111 of the rotating component 10, greatly reducing the axial bearing pressure of the first vertical linear actuator 4, and improving the load-bearing stability and operational reliability of the equipment.

[0048] In one embodiment of the present invention, such as Figure 6 and Figure 7 As shown, two limiting grooves 12 are symmetrically opened on the frame plate 111, and an electromagnet 13 is installed in the limiting groove 12. Two limiting sliders 14 are symmetrically arranged on the load-bearing plate 112. The two limiting sliders 14 are slidably connected to the two limiting grooves 12 respectively, and the limiting sliders 14 are magnetically connected to the electromagnets 13.

[0049] Furthermore, the electromagnet 13 can be connected to the inner wall of the limiting groove 12 via an elastic element (e.g., a spring) or a horizontal linear actuator.

[0050] It is understood that the limiting slide 12 and the limiting slider 14 described in this embodiment cooperate with each other to guide and limit the horizontal movement of the load-bearing plate 112, ensuring that the load-bearing plate 112 does not deviate or shake during movement. The electromagnet 13 generates magnetic force when energized, which can attract the limiting slider 14, realizing the rapid positioning and locking of the load-bearing plate 112 on the frame plate 111, which facilitates the adjustment of the position of the load-bearing plate 112.

[0051] Furthermore, such as Figure 3 and Figure 4 As shown, a plurality of second horizontal linear actuators 15 are provided on the mounting plate 5, and a plurality of bases 6 are respectively provided on the drive ends of the plurality of second horizontal linear actuators 15. The second horizontal linear actuators 15 are used to drive the bases 6 to move horizontally.

[0052] It should be noted that the second horizontal linear actuator 15 described in this embodiment can be symmetrically arranged in two groups (one group has two second horizontal linear actuators 15). The driving ends of the two second horizontal linear actuators 15 in each group are connected to a support column, and the top of the support column is fixedly connected to the lower part of the base 6.

[0053] The surface contact curing position of the load-bearing plate 112 and the line contact detection position of the support roller 7 will vary depending on the size of the concrete specimen. When the load-bearing plate 112 and the base 6 are connected by the snap-fit ​​of the clamping plate 9 and the clamping groove 114, the second horizontal linear actuator 15 will also drive the load-bearing plate 112 to adjust its working position while driving the base 6 to move horizontally (the electromagnet 13 is de-energized and loses its magnetism during the adjustment process).

[0054] In one embodiment of the present invention, such as Figure 5 , Figure 6 and Figure 7 As shown, the immersion assembly 11 further includes: two first clamping members 115 and two second clamping members 116. Each first clamping member 115 includes: a third horizontal linear actuator 1151, a first clamping plate 1152, multiple first bidirectional pumps 1153, multiple first inner oil bladders 1154, and multiple first outer oil bladders 1155. The multiple first bidirectional pumps 1153, multiple first inner oil bladders 1154, and multiple first outer oil bladders 1155 correspond one-to-one.

[0055] The third horizontal linear actuator 1151 is mounted on the frame plate 111, and the first clamping plate 1152 is mounted on the drive end of the third horizontal linear actuator 1151. The first clamping plate 1152 is detachably connected (contact connection) to the side wall of the concrete specimen. The first clamping plate 1152 has multiple first grooves 1156, and multiple first outer oil bladders 1155 are respectively mounted in the multiple first grooves 1156. The first clamping plate 1152 has a first cavity 1157, and multiple first bidirectional pumps 1153 and multiple first inner oil bladders 1154 are respectively mounted in the first cavity 1157. The first outer oil bladder 1155 is connected to the first oil port of the first bidirectional pump 1153, and the first inner oil bladder 1154 is connected to the second oil port of the first bidirectional pump 1153.

[0056] The second clamping member 116 may include: a fourth horizontal linear actuator 1161, a second clamping plate 1162, a plurality of second bidirectional pumps 1163, a plurality of second inner oil bladders 1164, and a plurality of second outer oil bladders 1165, wherein the plurality of second bidirectional pumps 1163, the plurality of second inner oil bladders 1164, and the plurality of second outer oil bladders 1165 correspond one-to-one.

[0057] The fourth horizontal linear actuator 1161 is mounted on the frame plate 111, and the second clamping plate 1162 is mounted on the drive end of the fourth horizontal linear actuator 1161. The second clamping plate 1162 is detachably connected (contact connection) to the side wall of the concrete specimen. The second clamping plate 1162 has multiple second grooves 1166, and multiple second outer oil bladders 1165 are respectively mounted in the multiple second grooves 1166. The second clamping plate 1162 has a second cavity 1167, and multiple second bidirectional pumps 1163 and multiple second inner oil bladders 1164 are respectively mounted in the second cavity 1167. The second outer oil bladders 1165 are connected to the second oil ports of the second bidirectional pumps 1163, and the second inner oil bladders 1164 are connected to the second oil ports of the second bidirectional pumps 1163.

[0058] The two first clamping members 115 are symmetrically arranged with the first center line of the frame plate 111 as the axis of symmetry, and the two second clamping members 116 are symmetrically arranged with the second center line of the frame plate 111 as the axis of symmetry. The first center line and the second center line are orthogonal.

[0059] The two first clamping plates 1152 abut against two of the four symmetrical sidewalls of the concrete specimen, and the two second clamping plates 1162 abut against the other two symmetrical sidewalls of the four sidewalls of the concrete specimen.

[0060] It is understood that the first clamping member 115 and the second clamping member 116 described in this embodiment are arranged orthogonally and symmetrically, which can center the concrete specimen from all sides and ensure that the specimen does not shift or tilt during water immersion curing and rotation.

[0061] It should be noted that the first inner oil bladder 1154 described in this embodiment can supply oil to multiple first outer oil bladders 1155 via the first bidirectional pump 1153, causing the first outer oil bladders 1155 to expand uniformly. During the testing process, the concrete specimen may fracture and displace. If it directly impacts the first clamping plate 1152, it will damage the first clamping plate 1152, affecting the subsequent positioning of the concrete specimen. When the first clamping plate 1152 centers the concrete specimen, the first outer oil bladders 1155 retract within the first groove 1156 and do not contact the concrete specimen. Only before immediate testing will the first outer oil bladders 1155 expand uniformly out of the first groove 1156. The second clamping member 116 operates in the same way as the first clamping member 115.

[0062] In one embodiment of the present invention, such as Figure 1 , Figure 2 , Figure 3 and Figure 8 The outer wall of the silo body 3 is provided with a second through groove 16, and a screen frame 17 is provided inside the silo body 3. The screen frame 17 is inserted into the silo body 3 through the second through groove 16.

[0063] It is understood that the sieve frame 17 described in this embodiment can collect concrete debris generated during the test, facilitating subsequent unified cleaning and maintenance. It is also understood that the second through slot 16 provides a pull-out installation channel for the sieve frame 17, facilitating quick installation, removal, and cleaning.

[0064] A first motor 18 is mounted on the drive end of the first vertical linear actuator 4, and the drive end of the first motor 18 is connected to the side wall of the mounting plate 5. A second vertical linear actuator 19 is mounted inside the chamber 3, and a first bearing seat 201 is mounted on the drive end of the second vertical linear actuator 19. The second vertical linear actuator 19 is used to drive the first bearing seat 201 to move vertically. The first bearing seat 201 is connected to the side wall of the mounting plate 5 through a rotating shaft 202. The axis of the drive end of the first motor 18 is collinear with the axis of the rotating shaft 202.

[0065] It is understood that the first motor 18 described in this embodiment can drive the mounting plate 5 to rotate around its drive end axis, dumping the concrete debris remaining on the surface of the support roller 7, base 6, and mounting plate 5 into the screen frame 17 inside the silo 3, thereby achieving automatic debris collection. The first bearing seat 201 cooperates with the rotating shaft 202 to provide stable support for the mounting plate 5, ensuring that the mounting plate 5 is stable and reliable during lifting and rotating.

[0066] Specifically, clean water is injected into water tank 1 to the preset water level. The working positions of the load-bearing plates 112 within the immersion assembly 11 are adjusted according to the size requirements of the concrete specimen. The first vertical linear actuator 4 drives the mounting plate 5 to move vertically, causing the base 6 to engage with the first through groove 113. The first horizontal linear actuator 8 drives the locking plate 9 to engage with the locking groove 114 on the inner wall of the first through groove 113, thus forming an integral support structure between the load-bearing plates 112 and the base 6. At this time, the working positions of the two load-bearing plates 112 and the base 6 can be adjusted simultaneously by extending and retracting the second horizontal linear actuator 15. After adjustment, the electromagnet 13, through its magnetic connection to the limiting slider 14, fixes the position of the load-bearing plate 112. Multiple sets of prepared concrete specimens are placed on the load-bearing plates 112 of different immersion components 11. The third horizontal linear actuator 1151 of the first clamping member 115 and the fourth horizontal linear actuator 1161 of the second clamping member 116 are activated. The third horizontal linear actuator 1151 drives the first clamping plate 1152 to move towards the concrete specimen, and the fourth horizontal linear actuator 1161 drives the second clamping plate 1162 to move towards the concrete specimen. After the two first clamping plates 1152 and the two second clamping plates 1162 abut against the four side walls of the concrete specimen, the concrete specimen is centered. After positioning, the first clamping plates 1152 and the second clamping plates 1162 are separated from the concrete specimen. Repeating the above operation allows multiple concrete specimens to be immersed in water and placed in their respective immersion components 11.

[0067] During testing, the second motor 104 of the rotating assembly 10 is started, and the second motor 104 drives the drive wheel 105 to rotate. The drive wheel 105 drives the driven wheel 103 and the support shaft 102 to rotate synchronously through gear meshing. The support shaft 102 drives the target water-immersed assembly 11 to rotate to the testing station through the bracket 203.

[0068] The first vertical linear actuator 4 is activated to drive the mounting plate 5 to rise. The support roller 7 passes through the first through groove 113 on the load-bearing plate 112 and lifts the concrete specimen, causing the concrete specimen to detach from the load-bearing plate 112 and form a line contact support for the standard three-point bending test. The first horizontal linear actuator 8 drives the clamping plate 9 to extend and engage with the clamping groove 114 on the inner wall of the first through groove 113, so that the load-bearing plate 112 and the base 6 form an integral support structure (if the surface contact curing position of the load-bearing plate 112 on the concrete specimen and the line contact test position of the support roller 7 are different at this time, the second horizontal linear actuator 15 needs to adjust the horizontal position of the support roller 7 and the load-bearing plate 112 simultaneously). Before starting the loading assembly 2, the first bidirectional pump 1153 and the second bidirectional pump 1163 are started. The first bidirectional pump 1153 extracts hydraulic oil from the first inner oil bladder 1154 and introduces it into the first outer oil bladder 1155, causing the first outer oil bladder 1155 to expand evenly outside the first groove 1156 (at this time, the first outer oil bladder 1155 does not need to contact the concrete specimen). When the concrete specimen breaks, the resulting displacement will impact the first outer oil bladder 1155, preventing the concrete specimen from impacting the first clamping plate 1152 and causing damage. The second bidirectional pump 1163 extracts hydraulic oil from the second inner oil bladder 1164 and introduces it into the second outer oil bladder 1165, causing the second outer oil bladder 1165 to expand evenly outside the second groove 1166 (at this time, the second outer oil bladder 1165 does not need to contact the concrete specimen). When the concrete specimen breaks, the resulting displacement will impact the second outer oil bladder 1165, preventing the concrete specimen from impacting the second clamping plate 1162 and causing damage.

[0069] The press 22 of the loading assembly 2 is activated, driving the loading head 23 downward to apply a stable and controllable load to the concrete specimen until it fractures, thus completing the flexural performance test of this group of concrete specimens. The entire test is conducted in the water tank 1, where the water effectively prevents cement debris and aggregate fragments from splashing during the test, reducing safety hazards. After the test is completed, the support roller 7 is reset. By repeating the above test process, multiple groups of concrete specimens can be continuously tested in a cyclical manner.

[0070] In one embodiment of the present invention, such as Figure 1 and Figure 2 As shown, the loading assembly 2 may include: a frame 21, a press 22, and a loading head 23, wherein the frame 21 is disposed on the upper part of the water tank 1, the press 22 is disposed on the frame 21, and the loading head 23 is disposed on the drive end of the press 22.

[0071] Understandably, the loading head 23 is used to directly contact the specimen and transmit the loading force, forming a standard three-point bending loading structure in conjunction with the lower support roller 7.

[0072] In one embodiment of the present invention, such as Figure 1 and Figure 2As shown, the water tank 1 has an opening at the top, which is located below the loading component 2. The side wall of the water tank 1 has a third through groove 207, and a gate valve 208 is installed in the third through groove 207.

[0073] It should be noted that the opening described in this embodiment can be provided in multiple ways (one of the multiple openings is located directly below the loading head 23), and the remaining openings can facilitate the removal of the tested concrete specimen from the water tank 1 from the opening directly below the loading head 23 while continuous testing is being carried out.

[0074] Understandably, the first drain pipe is connected to the tank body 3 and is located below the screen frame 17. A valve is installed at the outlet of the first drain pipe, which extends through the water tank 1 to the outside of the water tank 1. The connection between the first drain pipe and the water tank 1 is sealed. A second drain pipe is also installed on the water tank 1.

[0075] In one embodiment of the present invention, such as Figure 5 , Figure 6 and Figure 7 As shown, slide rails 204 (double track) are respectively provided on the inner walls of both sides of the frame plate 111, and sliding blocks 205 are respectively provided on both sides of each load-bearing plate 112. The two sliding blocks 205 on a load-bearing plate 112 correspond one-to-one with the two slide rails 204. The sliding blocks 205 are slidably connected to the slide rails 204. Bellows covers 206 are respectively provided on both sides of the sliding blocks 205. One end of the bellows cover 206 is connected to the sliding block 205, and the other end of the bellows cover 206 is connected to the inner wall of the frame plate 111.

[0076] It is understood that the accordion cover 206 described in this embodiment can extend and retract synchronously with the sliding block 205, sealing and shielding the slide rail 204 throughout the entire process, effectively preventing underwater concrete debris and mortar debris from entering the interior of the track, and avoiding wear and blockage of the slide rail 204.

[0077] It should be noted that a control console may be installed on the water tank 1. The control console is electrically connected to the loading assembly 2, the first vertical linear actuator 4, the first horizontal linear actuator 8, the rotating assembly 10, the immersion assembly 11, the electromagnet 13, the second horizontal linear actuator 15, the first motor 18, and the second vertical linear actuator 19, respectively.

[0078] It should be noted that the motors described in the above embodiments (e.g., the first motor 18 and the second motor 104, etc.) are equipped with brakes, which can make the motor stop running quickly. A gearbox is provided on the drive end of the motor, and the drive end of the motor is connected to the input end of the gearbox. The output end of the gearbox constitutes the drive end of the motor, and the speed of the motor output is adjusted by the gearbox.

[0079] The linear actuators (horizontal linear actuators and vertical linear actuators) described in the above embodiments can be selected from one of the following as needed: a fully sealed waterproof electric push rod (single or multiple sections), an underwater hydraulic cylinder (single or multiple sections), or a stainless steel waterproof cylinder (single or multiple sections).

[0080] In summary, the concrete flexural performance testing equipment of this invention can integrate underwater curing and testing of concrete, avoid errors and damage caused by transfer, eliminate the risk of debris, and improve the efficiency of batch testing.

[0081] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0082] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," and "example" refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0083] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A device for testing the flexural strength of concrete, characterized in that, include: Water tank (1), on which a loading assembly (2) is installed; The chamber (3) is located inside the water tank (1), and a first vertical linear actuator (4) is installed inside the chamber (3). Mounting plate (5) is set on the drive end of the first vertical linear actuator (4); Multiple bases (6) are respectively set on the mounting plate (5). A support roller (7) is provided on the upper part of the base (6), and multiple first horizontal linear actuators (8) are symmetrically arranged on the base (6). A clamping plate (9) is provided on the drive end of the first horizontal linear actuator (8). A rotating assembly (10) is disposed inside the water tank (1). The rotating assembly (10) is provided with a plurality of immersion assemblies (11). The rotating assembly (10) is used to drive the plurality of immersion assemblies (11) to rotate inside the water tank (1). The immersion assembly (11) is disposed between the loading assembly (2) and the chamber (3). The immersion assembly (11) includes a frame plate (111) and multiple load-bearing plates (112). Multiple bases (6) correspond one-to-one with multiple load-bearing plates (112). The frame plate (111) is disposed on the rotating assembly (10). Multiple load-bearing plates (112) are respectively disposed on the frame plate (111). A first through groove (113) is provided on the load-bearing plate (112) for the base (6) to pass through. Multiple slots (114) are symmetrically provided on the inner wall of the first through groove (113). Multiple first horizontal linear actuators (8) are configured to drive multiple slots (9) to be detachably connected to multiple slots (114).

2. The concrete flexural strength testing equipment according to claim 1, characterized in that, Two limiting grooves (12) are symmetrically provided on the frame plate (111). An electromagnet (13) is provided in the limiting groove (12). Two limiting sliders (14) are symmetrically provided on the load-bearing plate (112). The two limiting sliders (14) are slidably connected to the two limiting grooves (12) respectively. The limiting sliders (14) are magnetically connected to the electromagnets (13).

3. The concrete flexural strength testing equipment according to claim 1, characterized in that, The mounting plate (5) is provided with a plurality of second horizontal linear actuators (15), and the plurality of bases (6) are respectively provided on the drive ends of the plurality of second horizontal linear actuators (15).

4. The concrete flexural strength testing equipment according to claim 1, characterized in that, The immersion assembly (11) further includes: two first clamping members (115) and two second clamping members (116). Each first clamping member (115) includes: a third horizontal linear actuator (1151), a first clamping plate (1152), multiple first bidirectional pumps (1153), multiple first inner oil bladders (1154), and multiple first outer oil bladders (1155). The multiple first bidirectional pumps (1153), multiple first inner oil bladders (1154), and multiple first outer oil bladders (1155) correspond one-to-one. The third horizontal linear actuator (1151) is mounted on the frame plate (111), and the first clamping plate (1152) is mounted on the drive end of the third horizontal linear actuator (1151). The first clamping plate (1152) is detachably connected to the side wall of the concrete specimen. The first clamping plate (1152) has multiple first grooves (1156) and the first outer oil bladder (1155) is mounted in the first groove (1156). The first clamping plate (1152) has a first cavity (1157) and multiple first bidirectional pumps (1153) and multiple first inner oil bladders (1154) are respectively mounted in the first cavity (1157). The first outer oil bladder (1155) is connected to the first oil port of the first bidirectional pump (1153), and the first inner oil bladder (1154) is connected to the second oil port of the first bidirectional pump (1153). The two first clamping members (115) are symmetrically arranged with the first center line of the frame plate (111) as the axis of symmetry, and the two second clamping members (116) are symmetrically arranged with the second center line of the frame plate (111) as the axis of symmetry. The first center line and the second center line are orthogonal. The second clamping members (116) and the first clamping members (115) have the same structure.

5. The concrete flexural strength testing equipment according to claim 1, characterized in that, The outer wall of the silo body (3) is provided with a second through groove (16), and a sieve frame (17) is provided inside the silo body (3). The sieve frame (17) is inserted into the silo body (3) through the second through groove (16).

6. The concrete flexural strength testing equipment according to claim 5, characterized in that, The first vertical linear actuator (4) is equipped with a first motor (18) on its drive end, and the drive end of the first motor (18) is connected to the side wall of the mounting plate (5). The chamber (3) is equipped with a second vertical linear actuator (19), and a first bearing seat (201) is provided on the drive end of the second vertical linear actuator (19). The first bearing seat (201) is connected to the side wall of the mounting plate (5) through a rotating shaft (202). The axis of the drive end of the first motor (18) is collinear with the axis of the rotating shaft (202).

7. The concrete flexural strength testing equipment according to claim 1, characterized in that, The rotating assembly (10) includes: a second bearing seat (101), a support shaft (102), a driven wheel (103), a second motor (104), and a driving wheel (105). The support shaft (102) is connected to the inner wall of the water tank (1) through the second bearing seat (101). The driven wheel (103) is mounted on the support shaft (102). The second motor (104) is mounted on the upper inner wall of the water tank (1). The driving wheel (105) is mounted on the driving end of the second motor (104). The driving wheel (105) and the driven wheel (103) mesh with each other. The multiple immersion assemblies (11) are connected to the support shaft (102) through multiple brackets (203).

8. The concrete flexural strength testing equipment according to claim 7, characterized in that, The loading assembly (2) includes: a frame (21), a press (22) and a loading head (23), wherein the frame (21) is located on the upper part of the water tank (1), the press (22) is located on the frame (21), and the loading head (23) is located at the drive end of the press (22).

9. The concrete flexural strength testing equipment according to claim 1, characterized in that, The water tank (1) has an opening at the top, which is located below the loading assembly (2). The side wall of the water tank (1) has a third through groove (207), and a gate valve (208) is installed in the third through groove (207).

10. The concrete flexural strength testing equipment according to claim 1, characterized in that, The inner walls of both sides of the frame plate (111) are respectively provided with slide rails (204), and the two sides of the load-bearing plate (112) are respectively provided with sliding blocks (205). The two sliding blocks (205) are slidably connected to the two slide rails (204). The two sides of the sliding blocks (205) are respectively provided with accordion covers (206). One end of the accordion cover (206) is connected to the sliding block (205), and the other end of the accordion cover (206) is connected to the inner wall of the frame plate (111).

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