Detection device for precast concrete planks
By employing an independent control and detection module unit and a guiding and regulating mechanism with a fixed circular base surrounding the bottom of the precast concrete slab testing device, multi-point and multi-position uniform pressure is achieved, solving the problem of inaccurate test results caused by local stress concentration in the existing technology, and improving the accuracy and adaptability of the test.
Patent Information
- Application Number
- CN202423163988.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-21
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2034-12-21
AI Technical Summary
Existing precast concrete slab compressive strength testing equipment uses single-point or multi-point loading methods, which means that the test results can only reflect the compressive strength of local areas and cannot comprehensively assess the true compressive strength of the entire slab. In addition, local stress concentration is prone to occur.
Design a testing device for precast concrete slabs. It adopts an independent control and testing module unit with a fixed circular base arranged around the bottom. Combined with a cylinder and a pressure sensor, it achieves multi-point and multi-position uniform pressure through a guiding mechanism and a control mechanism to ensure the consistency and accuracy of the force at each testing point, and is suitable for slabs of different sizes and shapes.
It enables comprehensive evaluation of precast concrete slabs, improves the accuracy and reliability of test results, avoids local stress concentration, and enhances the versatility and precision of the test.
Smart Images
Figure CN223870442U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to building material detection technical field, concretely is a kind of detection device of prefabricated concrete slab. BACKGROUND
[0002] In modern construction engineering, prefabricated concrete slab is widely used in various building structures due to its high construction efficiency and strong quality controllability. In order to ensure the safety and durability of the building, it is crucial to accurately detect the various performance indicators of the prefabricated concrete slab. In particular, the compressive strength, as one of the important parameters for measuring the load-bearing capacity of the concrete slab, directly relates to the overall safety and stability of the building.
[0003] The existing prefabricated concrete slab compression detection equipment mostly adopts the traditional single-point loading method, that is, the concrete slab is fixed by a fixed clamp, and pressure is applied at one or a limited number of positions to measure the compressive strength. However, this method has significant problems: due to the uneven distribution of material density and structural defects within the concrete slab, a single or small number of detection points cannot fully reflect the true compressive performance of the entire slab. At the same time, the single-point or multi-point but non-multi-position loading method can easily lead to local stress concentration, causing the edge area to bear excessive pressure and the center or other areas to be insufficiently stressed, affecting the accuracy of the test results and failing to truly reflect the actual compressive performance of the concrete slab. SUMMARY
[0004] The purpose of the utility model is to provide a detection device for prefabricated concrete slab to solve the problem of the current prefabricated concrete slab compression detection equipment using single-point or multi-point but non-multi-position loading method, which makes the detection results only reflect the compressive performance of the local area and cannot fully evaluate the true compressive capacity of the entire prefabricated concrete slab.
[0005] To achieve the above purpose, the utility model provides the following technical scheme: a detection device for prefabricated concrete slab, comprising a machine body, a bearing table is provided on the base of the machine body, adjustable clamp assemblies composed of clamp seats and clamp plates are provided on both sides of the bearing table, and a fixed round seat driven by a hydraulic cylinder is provided at the bottom of the top plate of the machine body, a plurality of groups of independent detection module units are provided around the bottom of the fixed round seat, the detection module units are composed of cylinders, detection blocks and pressure sensors, the top ends of the detection module units are connected with the fixed round seat through guide mechanisms composed of guide shafts and guide sleeves, and a plurality of groups of regulation and control mechanisms are also provided around the top of the fixed round seat.
[0006] Preferably, the inner part of the fixed circular seat is provided with a plurality of rectangular grooves, and a threaded cylinder is fixed at the inner part of each rectangular groove of the fixed circular seat, the inner end of the guide shaft is connected to the inner part of the threaded cylinder through a threaded structure, and the guide sleeve is movably sleeved on the outer part of the guide shaft.
[0007] Preferably, the regulating mechanism comprises a screw seat, an adjusting screw and a push block, the screw seat is fixed on the top of the fixed circular seat, the adjusting screw is transversely inserted into the inner part of the threaded cylinder through a threaded structure, the push block is fixed on the outer end of the adjusting screw, and the bottom end of the push block is fixedly connected with the top of the guide sleeve through a strip-shaped through hole formed on the fixed circular seat.
[0008] Preferably, the two sides of the top of the machine body are provided with angle supports, the inner part of each angle support is provided with a vertical shaft, and the bottom plate of the bearing table is provided with sliding holes matched with the vertical shafts on both sides.
[0009] Preferably, the outer part of the bottom end of the vertical shaft is sleeved with a damping sleeve, and the gap between the bottom plate of the bearing table and the top of the machine body base is filled with a damping pad with a multilayer structure.
[0010] Preferably, the bottom end of the clamp seat is symmetrically provided with pull shafts, the two sides of the bearing table are symmetrically provided with pull holes matched with the structure of the pull shafts, and the front and rear ends of the two sides of the bearing table are transversely inserted with locking bolts through a threaded structure.
[0011] Compared with the prior art, the precast concrete slab detection device can uniformly apply pressure at multiple points, ensure that each detection point can obtain consistent and real stress conditions, comprehensively reflect the real compressive performance of the slab, avoid local stress concentration, and improve the accuracy and reliability of the test results. The device is provided with a plurality of groups of independent control detection module units arranged around the bottom of the fixed circular seat, and the precise pressure application of the cylinder and the detection block and the real-time monitoring of the pressure sensor are combined, so that the precast concrete slab can be comprehensively evaluated, the guide mechanism composed of the guide shaft and the guide sleeve ensures the accuracy of the pressure application direction, and the regulating mechanism provides flexible position adjustment capability, so that the whole system can adapt to precast concrete slabs of different sizes and shapes, and the universality and accuracy of the detection are enhanced. BRIEF DESCRIPTION OF DRAWINGS
[0012] Fig. 1 It is a structural schematic view of the precast concrete slab detection device.
[0013] Fig. 2 It is a structural schematic view of the bottom of the fixed circular seat of the precast concrete slab detection device.
[0014] Fig. 3The utility model discloses a bearing table of detection device of precast concrete slab's overhead structure schematic diagram.
[0015] In the drawing: 1, machine body; 2, bearing table; 3, fixture seat; 4, fixture plate; 5, fixed round seat; 6, detection module unit; 61, air cylinder; 62, detection pressing block; 63, pressure sensor; 7, regulation mechanism; 71, screw seat; 72, adjusting screw; 73, push block; 8, guide shaft; 9, guide sleeve; 10, threaded cylinder; 11, angle support; 12, vertical shaft; 13, damping sleeve; 14, damping pad; 15, pull-out shaft. DETAILED DESCRIPTION
[0016] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the utility model.
[0017] Please refer to Figs. 1-3The utility model provides a technical scheme: a kind of precast concrete slab's detection device, including machine body 1, the base of machine body 1 is equipped with bearing table 2, bearing table 2 is overall rectangular structure, adjustable clamp assembly being by clamp seat 3 and clamp plate 4 is equipped in the both sides of bearing table 2, clamp seat 3 is vertically equipped in the both sides of bearing table 2, the output end of push cylinder installed in clamp plate 4 fixedly connected in clamp seat 3, and the top plate bottom of machine body 1 is equipped with the fixed round seat 5 of driving by hydraulic cylinder starting, the bottom of fixed round seat 5 is equipped with several groups of detection module unit 6 that are independently controlled around, detection module unit 6 is by cylinder 61, detection pressure block 62 and pressure sensor 63, the top of detection module unit 6 is connected with fixed round seat 5 by the guide mechanism being by guide shaft 8 and guide sleeve 9, and the top of fixed round seat 5 is also equipped with several groups of regulation mechanism 7 around, the bearing table 2 of this structure is used to place the precast concrete slab to be detected, and the adjustable clamp assembly of the both sides of bearing table 2 is by clamp seat 3 and clamp plate 4 is equipped, by adjusting the position of clamp plate 4 to adapt to different sizes of precast concrete slab, and ensure its stable fixation in testing process, and when hydraulic cylinder starts driving fixed round seat 5 and moves downward, several groups of independently controlled detection module unit 6 around the bottom of fixed round seat 5 start working, the cylinder 61 in detection module unit 6 pushes detection pressure block 62 and contacts and presses on different positions of precast concrete slab, while pressure sensor 63 monitors the pressure value of each detection point in real time, while detection module unit 6 is matched with regulation mechanism 7 by the guide mechanism being by guide shaft 8 and guide sleeve 9, can realize the position of each detection module unit 6 is adjusted, to realize the purpose of multiple-point even pressure, so that the device not only realizes the even pressure of precast concrete slab multiple point multi-position, also ensures that each detection point can obtain consistent and true stress condition, comprehensively reflects the real compressive strength of plate, and avoids the local stress concentration problem caused by traditional single-point or multiple-point non multi-position loading mode, so that edge area will not bear too much pressure, center and other areas also will not appear insufficient stress condition, to improve the accuracy and reliability of test result, solve the problem that test result is inaccurate in prior art due to local stress concentration, the inside of fixed round seat 5 is equipped with several rectangular grooves around, the inner end of each rectangular groove in fixed round seat 5 is fixed with threaded barrel 10, the inner end of guide shaft 8 is connected in the inside of threaded barrel 10 by screw structure, and guide sleeve 9 is movably sleeved on the outside of guide shaft 8, the guide shaft 8 of this structure can be rotated in threaded barrel 10 to adjust the position of its extension, to realize the fine adjustment of the position of detection module unit 6, ensure that each detection point can accurately reach predetermined position, regulation mechanism 7 includes screw seat 71, adjusting screw 72 and push block 73, and there are four groups, screw seat 71 is fixed around the top of fixed round seat 5, adjusting screw 72 is transversely inserted in the inside of threaded barrel 10 by screw structure, push block 73 is fixed on the outer end of adjusting screw 72,And the bottom end of the push block 73 is fixedly connected with the top of the guide sleeve 9 through the strip-shaped opening provided on the fixed round seat 5, so that the operator can accurately control the transverse displacement of the push block 73 in the threaded cylinder 10 in advance by rotating the adjusting screw 72, thereby driving the push block 73 to move along the strip-shaped opening, and the movement of the push block 73 directly acts on the guide sleeve 9, so that the guide sleeve 9 can be adjusted transversely along the outside of the guide shaft 8 as needed, further ensuring that the detection module unit 6 can be accurately positioned to the predetermined test point. This linkage not only realizes fine adjustment of the position of the detection module unit 6, but also ensures the relative position between each detection point to be accurate, improves the consistency and accuracy of uniform pressure on multiple points, and enhances the flexibility and adaptability of the system. Reliable compression performance test can be realized on precast concrete slabs of different sizes and shapes, improving the reliability and repeatability of the test results. Both sides of the top of the machine body 1 are provided with angle supports 11, the inside of the angle supports 11 is provided with vertical shafts 12, both sides of the bottom plate of the bearing table 2 are provided with sliding holes matched with the vertical shafts 12, the outside of the bottom end of the vertical shaft 12 is provided with a damping sleeve 13, and the gap between the bottom plate of the bearing table 2 and the top of the machine body 1 is filled with a damping pad 14 of a multilayer structure. The bearing table 2 of this structure can slide up and down along the vertical shaft 12 through the sliding holes on its bottom plate when it is under stress, ensuring the stability and perpendicularity of the bearing table 2 when adjusting the height. When the bottom plate of the bearing table 2 acts on the damping sleeve 13 and the multilayer damping pad 14, the damping sleeve 13 effectively absorbs the vibration generated during system operation, reducing the impact of these vibrations on test accuracy. The damping pad 14 further weakens the vibration and noise caused by mechanical movement, ensuring the stability of the test environment. The damping pad 14 is composed of alternating rubber layers and metal spring sheets. Each layer of rubber is made of high-damping natural rubber, which has excellent elasticity and durability and can effectively absorb high-frequency vibrations. The metal spring sheets sandwiched between the rubber layers are made of high-strength stainless steel, providing additional support. The bottom end of the clamp seat 3 is symmetrically welded and fixed with a pull shaft 15, both sides of the bearing table 2 are symmetrically provided with pull holes matched with the structure of the pull shaft 15, and the front and rear ends of both sides of the bearing table 2 are inserted with locking bolts through the threaded structure. The clamp seat 3 of this structure can be adjusted in position by pulling the pull shaft 15 in the pull holes on both sides of the bearing table 2 to adapt to different specifications of precast concrete slabs. When the clamp seat 3 is adjusted to the appropriate position, the locking bolts on both sides of the bearing table 2 can be rotated to further secure the position of the clamp seat 3, ensuring that it does not shift or loosen during testing. This ensures the stable clamping of the clamp seat 3 and the clamp plate 4 on precast concrete slabs of different sizes.
[0018] Working principle: when using the detection device of the prefabricated concrete plate, first, place the prefabricated concrete plate on the bearing table 2, then, through the cooperation of the pulling shaft 15 at the bottom end of the clamp seat 3 and the pulling hole corresponding to both sides of the bearing table 2, quickly position the clamp seat 3, and further reinforce the position of the clamp seat 3 by using the locking bolts at the front and rear ends of both sides of the bearing table 2, to ensure that it is stable and immovable during testing, next, start the push cylinder installed on the clamp seat 3, make the clamp plate 4 tightly adhere to the edge of the prefabricated concrete plate, realize the stable fixation of the prefabricated concrete plate, after the above preparation work is completed, the operator adjusts the position of the push block 73 in advance by rotating the adjusting screw 72 in the rotating control mechanism 7, and then drives the guide sleeve 9 to move along the guide shaft 8, to ensure that each detection module unit 6 can be accurately positioned to the predetermined test point, at the same time, the guide shaft 8 is further adjusted by rotating in the threaded cylinder 10, to optimize the position accuracy of the detection module unit 6, after preparation, start the hydraulic cylinder to drive the fixed circular seat 5 to move downward, so that the cylinder 61 in the detection module unit 6 pushes the detection block 62 to contact and press on different positions of the prefabricated concrete plate, in this process, the pressure sensor 63 monitors the pressure value of each detection point in real time, finally, when all the detection points complete the pressure application and data acquisition, the hydraulic cylinder drives the fixed circular seat 5 to reset, the whole detection process is completed, thereby completing a series of work.
[0019] Although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.
Claims
1. A testing device for precast concrete slabs, comprising a body (1), characterized in that: The base of the machine body (1) is provided with a support platform (2). Both sides of the support platform (2) are provided with adjustable clamping assemblies consisting of clamping seats (3) and clamping plates (4). The bottom of the top plate of the machine body (1) is provided with a fixed round seat (5) driven by a hydraulic cylinder. The bottom of the fixed round seat (5) is surrounded by several sets of independently controlled detection module units (6). The detection module unit (6) consists of a cylinder (61), a detection pressure block (62), and a pressure sensor (63). The top of the detection module unit (6) is connected to the fixed round seat (5) through a guide mechanism consisting of a guide shaft (8) and a guide sleeve (9). The top of the fixed round seat (5) is also surrounded by several sets of adjustment mechanisms (7).
2. The testing device for precast concrete slabs according to claim 1, characterized in that: The fixed round seat (5) has several rectangular grooves arranged around its interior. A threaded cylinder (10) is fixed to the inside of each rectangular groove of the fixed round seat (5). The inner end of the guide shaft (8) is connected to the inside of the threaded cylinder (10) through a threaded structure. The guide sleeve (9) is movably sleeved on the outside of the guide shaft (8).
3. The testing device for precast concrete slabs according to claim 2, characterized in that: The control mechanism (7) includes a screw seat (71), an adjusting screw (72), and a push block (73). The screw seat (71) is fixed around the top of the fixed round seat (5). The adjusting screw (72) is inserted laterally into the inside of the threaded cylinder (10) through a threaded structure. The push block (73) is fixed to the outer end of the adjusting screw (72), and the bottom end of the push block (73) is fixedly connected to the top of the guide sleeve (9) through a strip-shaped opening on the fixed round seat (5).
4. The testing device for precast concrete slabs according to claim 1, characterized in that: The top of the machine body (1) is provided with corner brackets (11) on both sides, and the corner brackets (11) are provided with vertical shafts (12) inside, and the bottom plate of the support platform (2) is provided with sliding holes that cooperate with the vertical shafts (12) on both sides.
5. The testing device for precast concrete slabs according to claim 4, characterized in that: The bottom end of the vertical shaft (12) is fitted with a vibration damping sleeve (13), and the gap between the bottom plate of the support platform (2) and the top of the base of the machine body (1) is filled with a multi-layer vibration damping pad (14).
6. The testing device for precast concrete slabs according to claim 1, characterized in that: The bottom end of the clamp seat (3) is symmetrically provided with a pull shaft (15), and both sides of the bearing platform (2) are symmetrically provided with pull holes that cooperate with the structure of the pull shaft (15). Both the front and rear ends of both sides of the bearing platform (2) are threaded with locking bolts.