Precast concrete stair detection device

Abstract

The utility model discloses a precast concrete stair detection device, which comprises a base provided with a moving mechanism; the fixing frame is arranged on the base, a loading mechanism is arranged on the fixing frame, and the loading mechanism is used for applying loading pressure to the prefabricated concrete stair; the supporting piece is arranged on the moving mechanism and used for supporting the prefabricated concrete stairs, and the moving mechanism can drive the supporting piece to move in the direction close to or away from the fixing frame; the collecting mechanism is used for collecting the displacement amount of the prefabricated concrete stair in the loading state; and the control mechanism is connected with the moving mechanism, the loading mechanism and the collecting mechanism to control the moving mechanism, the loading mechanism and the collecting mechanism to work. According to the precast concrete stair detection device, the precast concrete stair detection device can be repeatedly used, is convenient to install, can automatically collect and convert data recorded in the experiment process, and can be suitable for precast concrete stairs of different specifications.

Description

TECHNICAL FIELD

[0001] The utility model relates to stair mechanics performance detection technical field further relates to a prefabricated concrete stair detection device. BACKGROUND

[0002] With the popularization of fabricated building, prefabricated components are more and more common, among them, the use of prefabricated stairs is extremely common, the concrete structure engineering construction quality acceptance specification GB 50204-2015 and prefabricated concrete stair JG / T562-2018 require that prefabricated components have certain bearing capacity requirements, especially the stairs used in commercial buildings, due to the high floor height, resulting in large span of stairs, which needs to load larger load. At present, the laboratory detects prefabricated stairs by using the method of uniform load distribution of weight, which needs to manually carry the weight to the stairs during the detection loading process, resulting in long loading cycle, large labor cost, high stack load, easy to cause safety accidents, and the obtained detection data needs to be further converted and cannot directly reflect the situation of the detected stairs.

[0003] Therefore, it is necessary to design a prefabricated concrete stair detection device to solve the above problems. UTILITY MODEL CONTENT

[0004] In view of the above technical problems, the purpose of the utility model is to provide a prefabricated concrete stair detection device, which can be reused, installed conveniently, can automatically collect and convert the data recorded in the experiment process, and can be applicable to different specifications of prefabricated concrete stairs.

[0005] In order to achieve the above purpose, the utility model provides a prefabricated concrete stair detection device, which comprises:

[0006] A base is provided with a moving mechanism;

[0007] A fixing frame is arranged on the base, and the fixing frame is provided with a loading mechanism, and the loading mechanism is used for applying loading pressure to the prefabricated concrete stair;

[0008] A support is arranged on the moving mechanism and used for supporting the prefabricated concrete stair, and the moving mechanism can drive the support to move towards the direction close to or away from the fixing frame;

[0009] A collection mechanism is used for collecting the displacement of the prefabricated concrete stair under the loading state;

[0010] A control mechanism is connected with the moving mechanism, the loading mechanism and the collection mechanism respectively to control the working thereof.

[0011] In some embodiments, the moving mechanism comprises a plurality of parallel and spaced apart sliding rails, at least two sliding blocks arranged on each of the sliding rails, and a driving mechanism connected with the sliding blocks, and the support is arranged on the sliding blocks, so that the driving mechanism can drive the support to reciprocate along the axial direction of the sliding rails.

[0012] In some embodiments, the fixing frame comprises a cross beam and two support columns, the two support columns are fixedly arranged on the base in a spaced apart manner, and the cross beam is fixedly arranged on the top of the two support columns, and the loading mechanism is arranged on the cross beam.

[0013] In some embodiments, the loading mechanism comprises a hydraulic jack, a cross rod, and at least two pressing members, the hydraulic jack is connected with the control mechanism, the body of the hydraulic jack is fixedly arranged on the cross beam, the telescopic end of the hydraulic jack is connected with the cross rod, at least two pressing members are arranged on the cross rod and located on the side of the cross rod away from the hydraulic jack, and the at least two pressing members are used to press on different steps of the prefabricated concrete stairs.

[0014] In some embodiments, at least two sliding seats are arranged on the cross rod, each of the pressing members is connected with a corresponding sliding seat, so that the pressing member can adjust the position on the cross rod.

[0015] In some embodiments, the pressing member comprises a telescopic rod and a pressing strip, the body of the telescopic rod is fixedly arranged on the sliding seat, the telescopic end of the telescopic rod is connected with the pressing strip, and the telescopic rod is connected with the control mechanism, so that the control mechanism can control the telescopic rod to adjust the height position of the pressing strip.

[0016] In some embodiments, the support comprises a first support and a second support, the first support and the second support are arranged in a spaced apart manner, the first support is used to support one end of the prefabricated concrete stairs, and the second support is used to support the other end of the prefabricated concrete stairs.

[0017] In some embodiments, the first support comprises a telescopic column and a first simply supported support, the body of the telescopic column is fixedly arranged on the moving mechanism, the telescopic end of the telescopic column is connected with the first simply supported support, and the first simply supported support is used to support one end of the prefabricated concrete stairs.

[0018] In some embodiments, the second support comprises a second simply supported support, and the second simply supported support is used to support the other end of the prefabricated concrete stairs.

[0019] In some embodiments, the collecting mechanism comprises a plurality of displacement meters, each of which is connected to the control mechanism, and each of the displacement meters is arranged on the prefabricated concrete stair to obtain the displacement of the prefabricated concrete stair under the loading state.

[0020] Compared with the prior art, the prefabricated concrete stair detection device provided by the utility model has at least one of the following beneficial effects:

[0021] 1. The prefabricated concrete stair detection device provided by the utility model has the following advantages: the loading mechanism is installed above the base through the fixing frame, the supporting piece is installed on the base through the moving mechanism, the supporting piece is moved to the side away from the fixing frame when the prefabricated concrete stair is installed, the installation of the prefabricated concrete stair is more convenient without any obstruction around, the supporting piece is moved to the lower side of the loading mechanism after the prefabricated concrete stair is installed to perform detection, the detection process is completed by the control mechanism, the deflection is automatically collected and calculated instead of manual reading and calculation, the labor intensity and human error are reduced, and the detection efficiency is improved.

[0022] 2. The prefabricated concrete stair detection device provided by the utility model has the following advantages: the prefabricated concrete stair is large in mass and difficult to move, the truss car needs to be used for hoisting during the hoisting process, and the accuracy of small-range movement is relatively low, the supporting piece is designed as the first support and the second support which are separately arranged, the first support and the second support can freely move on the slide rail and are adjustable in height, the prefabricated concrete stair can be conveniently adjusted in small size, and the prefabricated concrete stair of different specifications can be applied.

[0023] 3. The prefabricated concrete stair detection device provided by the utility model has the following advantages: the loading mechanism has a plurality of height-adjustable top pressing pieces, and the position of the top pressing piece is also adjustable, the loading point position is flexibly adjustable, the loading technical requirement of different stairs is met, the loading mode is simplified, and the collapse accident caused by the high placement of the weight caused by the uniform distribution of the weight is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0024] The above characteristics, technical features, advantages and implementation modes of the prefabricated concrete stair detection device will be further described in the following preferred embodiments in a clear and easy-to-understand manner combined with the drawings.

[0025] Figure 1 is a structure schematic view of the prefabricated concrete stair detection device of the preferred embodiment of the utility model;

[0026] Figure 2 is a structure schematic view of the fixing frame of the preferred embodiment of the utility model;

[0027] Figure 3 is a structure schematic view of the base of the preferred embodiment of the utility model;

[0028] Figure 4 is a preferred embodiment of the first support structure schematic view of the utility model.

[0029] Explanation of reference numerals:

[0030] Base 1, moving mechanism 11, fixed frame 2, cross beam 21, support column 22, hydraulic jack 23, cross rod 24, sliding seat 25, telescopic rod 26, pressing strip 27, support piece 3, first support 31, telescopic column 311, first simply supported support 312, connecting seat 313, second support 32, second simply supported support 321, prefabricated concrete stair 4. DETAILED DESCRIPTION

[0031] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the specific embodiments of the utility model will be described below with reference to the drawings. Obviously, the drawings described below are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creating labor, and other embodiments can also be obtained.

[0032] In order to make the drawing simple, only the parts related to the utility model are shown in each drawing, and they do not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, in some drawings, only one of the components with the same structure or function is shown, or only one of them is marked. In this paper, "one" not only means "only one", but also means "more than one" situation.

[0033] It should be further understood that the term "and / or" used in the specification and the appended claims means one or more of the associated listed items in any combination and all possible combinations, and includes these combinations.

[0034] In this paper, it should be noted that unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0035] In addition, in the description of the present application, the terms "first", "second" and the like are only used for distinguishing description, and cannot be understood as indicating or implying relative importance.

[0036] In one embodiment, reference is made to the drawings attached Figures 1 to 4The utility model provides a prefabricated concrete stair detection device, it includes: base 1, fixed frame 2, support piece 3, acquisition mechanism and control mechanism. Base 1 is provided with moving mechanism 11, fixed frame 2 sets up on base 1, and fixed frame 2 is provided with loading mechanism, and loading mechanism is used to exert loading pressure to prefabricated concrete stair 4;Support piece 3 sets up on moving mechanism 11 and is used to support prefabricated concrete stair 4, and moving mechanism 11 can drive support piece 3 to move to the direction close to or away from fixed frame 2;Acquisition mechanism is used to gather the displacement of prefabricated concrete stair 4 under loading state;Control mechanism is connected with moving mechanism 11, loading mechanism, acquisition mechanism respectively to control its work.

[0037] In the embodiment, the loading mechanism is installed above the base 1 through the fixed frame 2, and the support piece 3 is installed on the base 1 through the moving mechanism 11. When the prefabricated concrete stair 4 is installed, the support piece 3 is moved to the side away from the fixed frame 2, and the installation of the prefabricated concrete stair 4 is more convenient without the obstruction around. After the prefabricated concrete stair 4 is installed, the support piece 3 is moved to the lower side of the loading mechanism for detection. The detection process is controlled by the control mechanism. The deflection is automatically collected and calculated instead of manual reading and calculation, which reduces the labor intensity and human error and improves the detection efficiency.

[0038] In one embodiment, the specification attached Figures 1 to 4 The moving mechanism 11 includes a plurality of parallel and spaced sliding rails, at least two sliding blocks arranged on each sliding rail, and a driving mechanism connected with the sliding blocks. The support piece 3 is arranged on the sliding blocks, so that the driving mechanism can drive the support piece 3 to move back and forth along the axial direction of the sliding rail. The driving mechanism can be an electric push rod mechanism, a gear chain mechanism, a screw nut mechanism, or a telescopic air cylinder mechanism.

[0039] The support piece 3 includes a first support 31 and a second support 32. The first support 31 and the second support 32 are arranged at intervals. The first support 31 is used to support one end of the prefabricated concrete stair 4, and the second support 32 is used to support the other end of the prefabricated concrete stair 4. The prefabricated concrete stair 4 has a large mass and is difficult to move. During hoisting, a truss crane is used for hoisting, which results in low accuracy of small-range movement. The device sets the support piece 3 as the first support 31 and the second support 32 arranged in a split manner. The first support 31 and the second support 32 can freely move on the sliding rail and are adjustable in height. The device not only facilitates the small-size adjustment of the prefabricated concrete stair 4, but also is applicable to different specifications of the prefabricated concrete stair 4.

[0040] Further, the first support 31 comprises a telescopic column 311 and a first simply supported support 312, the body of the telescopic column 311 is fixed on the moving mechanism 11, the telescopic end of the telescopic column 311 is connected with the first simply supported support 312, and the first simply supported support 312 is used for bearing one end of the prefabricated concrete stair 4. The second support 32 comprises a second simply supported support 321, and the second simply supported support 321 is used for bearing the other end of the prefabricated concrete stair 4. The simply supported support, namely the spherical support, mainly comprises an upper seat plate, a middle seat plate and a lower seat plate, a stainless steel sliding plate arranged on the bottom plane of the upper seat plate and a plane modified ultra-high molecular weight polyethylene sliding plate inlaid on the upper surface of the middle seat plate form a plane sliding friction pair, so as to realize the horizontal displacement of the support; the middle seat plate is a convex spherical surface structure, the lower seat plate is a concave spherical surface structure matched with the convex spherical surface of the middle seat plate, a spherical stainless steel sliding plate arranged on the bottom spherical surface of the middle seat plate and a spherical modified ultra-high molecular weight polyethylene sliding plate inlaid on the concave spherical surface of the lower seat plate form a spherical sliding friction pair, which together with the plane sliding friction pair realizes the rotary displacement of the support; a plane modified ultra-high molecular weight polyethylene sealing ring is arranged between the upper seat plate and the middle seat plate and surrounds the plane sliding friction pair; a spherical modified ultra-high molecular weight polyethylene sealing ring is arranged between the middle seat plate and the lower seat plate and surrounds the spherical sliding friction pair.

[0041] For example, referring to the drawings in the specification Figure 3 The base 1 has a square structure welded by steel members, two slide rails are arranged in parallel and at intervals along the length direction of the base 1, two groups of slide blocks are arranged on the two slide rails, the second simply supported support 321 is fixed on one group of slide blocks, and the first support 31 is fixed on the other group of slide blocks. Since the first support 31 needs to support the higher end of the prefabricated concrete stair 4, a connecting seat 313 is arranged at the bottom of the telescopic column 311 to increase the height, and the connecting seat 313 is fixed on the other group of slide blocks. In order to improve the structural stability of the first support 31, two or more telescopic columns 311 are arranged, the two telescopic columns 311 are fixed at intervals on the connecting seat 313, and the telescopic ends of the two telescopic columns 311 are fixedly connected with the first simply supported support 312. The telescopic column 311 can adopt a manual telescopic screw structure or an automatic hydraulic cylinder or pneumatic cylinder structure.

[0042] It should be pointed out that the specific structures of the moving mechanism 11 and the support 3 are described in correspondence with the drawings in the specification, and in the actual use process, as long as a structure or device capable of realizing the above functions can be adopted, which is only for better illustrating the utility model and should not constitute a limitation on the utility model.

[0043] In one embodiment, referring to the drawings in the specification Figure 2 The fixed frame 2 comprises a cross beam 21 and two support columns 22, the two support columns 22 are fixed at intervals on the base 1, the cross beam 21 is fixed on the top of the two support columns 22, the cross beam 21 is perpendicular to the length direction of the base 1, and the loading mechanism is arranged on the cross beam 21.

[0044] The loading mechanism comprises a hydraulic jack 23, a cross bar 24 and at least two pressing members. The hydraulic jack 23 is connected with the control mechanism. The body of the hydraulic jack 23 is fixed on the cross beam 21. The telescopic end of the hydraulic jack 23 is connected with the cross bar 24. The at least two pressing members are arranged on the cross bar 24 and located on the side of the cross bar 24 away from the hydraulic jack 23. The at least two pressing members are used for pressing on different steps of the prefabricated concrete stair 4.

[0045] Further, at least two sliding seats 25 are arranged on the cross bar 24. Each pressing member is connected with a corresponding sliding seat 25, so that the position of the pressing member can be adjusted in the length direction of the cross bar 24. The pressing member comprises a telescopic rod 26 and a pressing strip 27. The body of the telescopic rod 26 is fixed on the sliding seat 25. The telescopic end of the telescopic rod 26 is connected with the pressing strip 27. The telescopic rod 26 is connected with the control mechanism, so that the control mechanism can control the telescopic rod 26 to adjust the height position of the pressing strip 27. Of course, the telescopic rod can also adopt a manual telescopic screw structure.

[0046] In the embodiment, the loading mode is changed from uniform loading to three-point concentrated loading. The loading mechanism has a plurality of height-adjustable pressing members, and the positions of the pressing members are also adjustable. Therefore, the positions of the loading points are flexibly adjustable, the technical requirements of loading for different stairs are met, the loading mode is simplified, and the collapse accident caused by the overhigh stacking of the weights due to the uniform loading by the weights is avoided.

[0047] It should be pointed out that the specific structure of the loading mechanism is described with reference to the drawings. In actual use, as long as a structure or device capable of realizing the above functions is adopted, it can be used. Here, only the utility model is better described, and it should not be limited to the utility model.

[0048] In one embodiment, the collecting mechanism comprises a plurality of displacement meters. The plurality of displacement meters are respectively connected with the control mechanism. The displacement meters are arranged on the bearing prefabricated concrete stair 4 to obtain the displacement of the prefabricated concrete stair 4 under the loading state. The control mechanism can be a control box, a computer or other device with a control function.

[0049] When the prefabricated concrete stair detection device detects, the displacement meter is connected with the computer. The displacement deformation of the displacement meter during the loading process is transmitted to the computer in real time. When the holding time reaches the requirement, the deflection of the prefabricated stair in the loading process is automatically calculated. Therefore, the manual displacement recording in the loading process can be converted into one-key control by the computer. Not only the overall deformation process of the component during the loading process can be observed in real time, but also whether the test process is normal can be timely focused, so that corresponding measures can be taken.

[0050] In the above embodiments, the description of each embodiment has its own focus, and the parts not described or recorded in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0051] It should be noted that the above embodiments can be freely combined as needed. The above is only the preferred embodiment of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should be considered as the protection scope of the present application.

Claims

1. A testing device for precast concrete stairs, characterized in that, include: A base, on which a moving mechanism is provided; A fixing frame is mounted on the base, and a loading mechanism is provided on the fixing frame. The loading mechanism is used to apply loading pressure to the precast concrete staircase. A support member, mounted on the moving mechanism, is used to support the precast concrete staircase. The moving mechanism can drive the support member to move closer to or away from the fixed frame. The data acquisition mechanism is used to collect the displacement of the precast concrete staircase under loading conditions. A control mechanism is connected to the moving mechanism, the loading mechanism, and the acquisition mechanism to control their operation.

2. The precast concrete staircase testing device according to claim 1, characterized in that, The moving mechanism includes a plurality of parallel and spaced slide rails, at least two sliders disposed on each slide rail, and a driving mechanism. The driving mechanism is connected to the sliders, and the support member is disposed on the sliders, so that the driving mechanism can drive the support member to reciprocate along the axial direction of the slide rails.

3. The precast concrete staircase testing device according to claim 1, characterized in that, The fixing frame includes a crossbeam and two support columns, the two support columns are fixed to the base at intervals, the crossbeam is fixed to the top of the two support columns, and the loading mechanism is disposed on the crossbeam.

4. The precast concrete staircase testing device according to claim 3, characterized in that, The loading mechanism includes a hydraulic jack, a crossbar, and at least two jacking components. The hydraulic jack is connected to the control mechanism. The body of the hydraulic jack is fixed to the crossbar. The telescopic end of the hydraulic jack is connected to the crossbar. At least two jacking components are disposed on the crossbar and located on the side of the crossbar away from the hydraulic jack. The at least two jacking components are used to press against different steps of the precast concrete staircase.

5. The precast concrete staircase testing device according to claim 4, characterized in that, The crossbar is provided with at least two slides, and each of the top pressing members is connected to the corresponding slide, so that the position of the top pressing member can be adjusted on the crossbar.

6. The precast concrete staircase testing device according to claim 5, characterized in that, The top pressing component includes a telescopic rod and a pressure strip. The body of the telescopic rod is fixed on the slide block, and the telescopic end of the telescopic rod is connected to the pressure strip. The telescopic rod is connected to the control mechanism, so that the control mechanism can control the telescopic rod to adjust the height position of the pressure strip.

7. The precast concrete staircase testing device according to any one of claims 1-6, characterized in that, The support includes a first support and a second support, which are arranged at intervals. The first support is used to support one end of the precast concrete staircase, and the second support is used to support the other end of the precast concrete staircase.

8. The precast concrete staircase testing device according to claim 7, characterized in that, The first support includes a telescopic column and a first simple support. The body of the telescopic column is fixed to the moving mechanism, and the telescopic end of the telescopic column is connected to the first simple support. The first simple support is used to support one end of the precast concrete staircase.

9. The precast concrete staircase testing device according to claim 7, characterized in that, The second support includes a second simply supported support, which is used to support the other end of the precast concrete staircase.

10. The precast concrete staircase testing device according to claim 1, characterized in that, The acquisition mechanism includes several displacement gauges, which are respectively connected to the control mechanism. The displacement gauges are used to be installed on the precast concrete staircase to acquire the displacement of the precast concrete staircase under load.

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