Concrete tensile deformation test device

Abstract

The utility model belongs to the technical field of concrete tensile deformation test, and particularly relates to a concrete tensile deformation test device, which comprises a frame, the frame is concentric-square-shaped, one side of the inner wall of the frame is fixedly provided with a motor, and two sides of the inner wall of the frame are rotatably connected with two symmetrically distributed two-way screws; the two shells are installed on the two sides of the inner wall of the frame in a sliding mode, and a measuring center is fixedly installed on one side of each shell; the moving assembly is arranged in the frame and is used for driving the two shells to move; the synchronous assembly is arranged outside the two shells and used for driving the two threaded sleeves to rotate at the same time, the two ends of concrete are clamped and fixed at the same time, the clamping strength is consistent, and the situation that due to the fact that the clamping strength of the two ends of the concrete is inconsistent, eccentric loads are generated in the concrete stretching process, and the clamping strength of the two ends of the concrete is not consistent is avoided. And therefore, convenience is brought to the use of the working personnel.

Description

TECHNICAL FIELD

[0001] The utility model belongs to concrete tensile deformation test technical field especially relates to a concrete tensile deformation test device. BACKGROUND

[0002] The concrete tensile deformation test is the test that is through the special test device to concrete test piece to exert axial tensile force, observes and records the deformation condition of test piece in the tensile process, so as to evaluate the tensile strength, deformation performance and failure characteristic of concrete material and the mechanical property test.

[0003] For example, the Chinese patent with the announcement number CN211784777U discloses a tensile creep test device for high-strength concrete, which includes a double-spring tensile creep device and a concrete test piece creep strain collection method. The double-spring tensile creep device uses double springs to ensure the stability of the loading process and the later stage load holding. The concrete test piece is provided with a linear differential displacement sensor on one side and a dial gauge detector on the other side. Under the premise of ensuring that the difference between the two collection methods is within the error range, the data points obtained by using the sensor in the early stage and the reading points obtained by using the dial gauge in the later stage are plotted by the logarithmic plotting method. This method can display the instantaneous deformation including elastic deformation in the initial loading stage and ensure that the deformation in several years does not approach the horizontal level. This method overcomes the limitations of traditional strain collection methods, such as the inability to distinguish values within a short period of time and the values outside the graph within a long period of time. The test device and method have the characteristics of simple operation, low cost, suitability for long-term tensile creep testing, reliable data, etc.

[0004] The above-mentioned patent has the following problems: in actual use, it does not have the function of simultaneously clamping both ends of the concrete to ensure that the clamping forces of both ends are consistent, and it is easy to cause inconsistent clamping forces of both ends. Inconsistent clamping forces of both ends can cause eccentric load: inconsistent clamping forces can cause the test piece to be subjected to non-uniform force during the stretching process, thereby causing eccentric load. This can affect the stress distribution of the test piece, so that the test results cannot truly reflect the tensile properties of the material. In view of this, we propose a concrete tensile deformation test device. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a concrete tensile deformation test device to solve the problems in the background art.

[0006] Therefore, the utility model provides a concrete tensile deformation test device, which comprises:

[0007] The frame is in the shape of a loop, a motor is fixedly installed on one side of the inner wall of the frame, two symmetrical double-direction screw rods are rotatably connected to the two sides of the inner wall of the frame, a fixed plate is fixedly connected to one side of the frame, a rotating shaft is rotatably connected to the top of the fixed plate, and the rotating shaft extends to the other side of the fixed plate.

[0008] Two housings are slidably installed on the two sides of the inner wall of the frame, a measurement center is fixedly installed on one side of the housing, a threaded sleeve is rotatably connected to one side of each of the two housings, the threaded sleeve extends to the inside of the housing, and a threaded rod is threadedly connected to the inside of the threaded sleeve.

[0009] A moving assembly is arranged in the inside of the frame and is used to drive the two housings to move.

[0010] A synchronous assembly is arranged outside the two housings and is used to drive the two threaded sleeves to rotate simultaneously.

[0011] In the technical solution, the two ends of the concrete are placed in the housings, the handle is held and rotated, the two telescopic shafts and the first bevel gear are driven to rotate, the second bevel gear and the threaded sleeve are driven to rotate, the threaded rod and the clamping plate are driven to move through the rotation of the threaded sleeve, the clamping plate is fixed in the housings at this time, the above structure is arranged, the concrete is clamped and fixed in the housings when the concrete is subjected to tensile deformation test, the two ends of the concrete are clamped and fixed at the same time, the clamping force is consistent, the concrete is not subjected to eccentric load in the tensile process due to the inconsistent clamping force of the two ends of the concrete, and the accuracy of the test result is affected, and the staff is facilitated to use.

[0012] The synchronous wheels and the synchronous belt arranged on the output shaft of the motor and the two double-direction screw rods are arranged, the two double-direction screw rods are driven to rotate simultaneously through the start of the motor, the two sets of two symmetrical threaded sleeves are driven to move oppositely, the two housings are driven to move oppositely, the connecting frame and the bearing are driven to move when the housings move, the telescopic shaft is stretched, the concrete is stretched, the measurement center is arranged, the data in the tensile process of the concrete is measured, the above structure is arranged, and the concrete fixed in the housings is subjected to tensile test.

[0013] In the above technical solution, further, the moving assembly comprises three synchronous wheels, the three synchronous wheels are fixedly sleeved on the two double-direction screw rods and the output shaft of the motor respectively, and the same synchronous belt is in mesh connection with the outer portions of the three synchronous wheels.

[0014] In the technical solution, the synchronous belt and the synchronous wheels arranged on the outer part of the two bidirectional screws are driven by the motor, so that the two bidirectional screws are simultaneously rotated by the starting of the motor.

[0015] In the technical solution, the outer thread of the bidirectional screw is connected with two symmetrically distributed thread sleeves, and one side of the thread sleeve is fixedly connected with the outer part of the shell.

[0016] In the technical solution, the two groups of two symmetrically distributed thread sleeves are oppositely moved to drive the two shells to oppositely move.

[0017] In the technical solution, the outer thread of the bidirectional screw is connected with two symmetrically distributed thread sleeves, and one side of the thread sleeve is fixedly connected with the outer part of the shell.

[0018] In the technical solution, the outer thread of the bidirectional screw is connected with two symmetrically distributed thread sleeves, and one side of the thread sleeve is fixedly connected with the outer part of the shell.

[0019] In the technical solution, the outer thread of the bidirectional screw is connected with two symmetrically distributed thread sleeves, and one side of the thread sleeve is fixedly connected with the outer part of the shell.

[0020] In the technical solution, the outer thread of the bidirectional screw is connected with two symmetrically distributed thread sleeves, and one side of the thread sleeve is fixedly connected with the outer part of the shell.

[0021] In the technical solution, the outer thread of the bidirectional screw is connected with two symmetrically distributed thread sleeves, and one side of the thread sleeve is fixedly connected with the outer part of the shell.

[0022] In the technical solution, the outer thread of the bidirectional screw is connected with two symmetrically distributed thread sleeves, and one side of the thread sleeve is fixedly connected with the outer part of the shell.

[0023] In the technical solution, the outer thread of the bidirectional screw is connected with two symmetrically distributed thread sleeves, and one side of the thread sleeve is fixedly connected with the outer part of the shell.

[0024] In the technical solution, the outer thread of the bidirectional screw is connected with two symmetrically distributed thread sleeves, and one side of the thread sleeve is fixedly connected with the outer part of the shell.

[0025] The beneficial effects of the utility model are as follows:

[0026] 1. The two ends of the concrete are placed in the interiors of the shells, rotation is carried out by holding the handles, the two telescopic shafts and the first bevel gear are driven to rotate, the second bevel gear and the threaded sleeve are driven to rotate, the threaded rod and the clamping plate are driven to move through the rotation of the threaded sleeve, the clamping plate can be fixed in the interiors of the two shells at this time, and the concrete can be clamped and fixed in the interiors of the two shells when the tensile deformation test of the concrete is carried out through the above structure.

[0027] 2. When the concrete fixed in the interiors of the shells needs to be tested in tension, the synchronous pulleys and synchronous belts outside the two bidirectional screw rods are driven to rotate through the starting of the motor, the two bidirectional screw rods are driven to rotate at the same time, the two groups of two symmetrically distributed threaded sleeves are driven to move oppositely, the two shells move oppositely at this time, the connecting frame and the bearing are driven to move when the shells move, the telescopic shaft is stretched, and the concrete is stretched, the data in the tensile deformation of the concrete can be measured through the measurement center, and the concrete fixed in the interiors of the shells can be tested in tension through the above structure. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is an overall structure schematic view of the utility model;

[0029] Figure 2 It is an overall structure cross-sectional view in the utility model;

[0030] Figure 3 It is a moving assembly structure schematic view in the utility model;

[0031] Figure 4 It is a synchronous assembly structure schematic view in the utility model;

[0032] Figure 5 It is a shell interior structure schematic view in the utility model.

[0033] Marked in the figure as:

[0034] 1, frame;2, motor;3, bidirectional screw rod;4, synchronous pulley;5, synchronous belt;6, threaded sleeve;7, shell;8, measurement center;9, threaded sleeve;10, threaded rod;11, clamping plate;12, fixed plate;13, rotating shaft;14, telescopic shaft;15, connecting frame;16, bearing;17, first bevel gear;18, second bevel gear;19, handle. DETAILED DESCRIPTION

[0035] With reference to the drawings and the embodiments described herein, it will be understood that the drawings and embodiments are illustrative of only a few of the embodiments of the present application and are not therefore to be considered limiting of its scope, for the application is not limited to the embodiments illustrated in the description below.

[0036] In the description of the present application, it should be understood that the terms used herein are for the purpose of describing specific embodiments and are not intended to limit the example embodiments of the present application. For the purpose of description, the size of each part shown in the drawings is not drawn in accordance with the actual ratio. The techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the authorized description. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Therefore, other examples of the example embodiments can have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0037] It should be noted that the terms "first", "second", and the like in the description and claims of the present application are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the use of the terms so designated is interchangeable under appropriate circumstances such that the embodiments of the present application described herein are capable of operation in other sequences than those illustrated or otherwise described herein. The terms "first", "second", and the like, so used in the description and claims are also not necessarily used consistently in reference to a particular aspect of the example embodiments of the present application, but are used in different places and / or times for the sake of comparison within the context.

[0038] It should be noted that in the description of the present application, the terms of orientation such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal", and "top, bottom" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and in the absence of contrary description, these orientation terms do not indicate and imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation terms "inner, outer" refer to the inner and outer relative to the contour of each component.

[0039] It should be noted that in this application, the terms "comprising", "including", or any other variant thereof are intended to cover a non-exclusive inclusion, such that processes, methods, articles, or apparatuses that comprise a list of elements not only include those elements, but also include other elements not expressly listed or inherent to such processes, methods, articles, or apparatuses. Without further limitation, an element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element. In addition, it should be pointed out that the scope of the methods and apparatuses in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but can also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method can be performed in an order different from that described, and various steps can also be added, omitted, or combined. In addition, the features described with reference to certain examples can be combined in other examples.

[0040] Embodiment 1:

[0041] Referring to Figures 1-5 The embodiment provides a concrete tensile deformation test device, which comprises:

[0042] The frame 1 is in the shape of a hairpin, a motor 2 is fixedly installed on one side of the inner wall of the frame 1, two symmetrical double-direction screw rods 3 are rotatably connected to the two sides of the inner wall of the frame 1, a fixed plate 12 is fixedly connected to one side of the frame 1, a rotating shaft 13 is rotatably connected to the top of the fixed plate 12, and one side of the rotating shaft 13 extends to the other side of the fixed plate 12.

[0043] Two housings 7 are slidably installed on the two sides of the inner wall of the frame 1, a measurement center 8 is fixedly installed on one side of the housing 7, a threaded sleeve 9 is rotatably connected to one side of each of the two housings 7, the threaded sleeve 9 extends to the inside of the housing 7 on one side, and a threaded rod 10 is screwedly connected to the inside of the threaded sleeve 9.

[0044] The moving assembly is arranged in the inside of the frame 1 and is used for driving the two housings 7 to move.

[0045] The synchronous assembly is arranged outside the two housings 7 and is used for driving the two threaded sleeves 9 to rotate simultaneously.

[0046] Wherein, the two ends of the concrete are placed inside the shell 7, by holding the handle 19 to rotate, the two telescopic shafts 14 are driven to rotate with the first bevel gear 17, the second bevel gear 18 is driven to rotate with the threaded sleeve 9, by the rotation of the threaded sleeve 9, the threaded rod 10 and the clamping plate 11 can be moved, at this time the clamping plate 11 can be fixed inside the two shells 7, through the above structure, the concrete can be clamped and fixed inside the two shells 7 during the tensile deformation test of the concrete, the device clamps and fixes the two ends of the concrete at the same time, the clamping force is consistent, which avoids the uneven clamping force of the two ends of the concrete, which can cause eccentric load during the stretching process of the concrete, thereby affecting the accuracy of the test results, thereby facilitating the use of the staff.

[0047] Through the synchronous wheel 4 and the synchronous belt 5 arranged outside the two bidirectional screws 3 and the output shaft of the motor 2, the rotation of the two bidirectional screws 3 can be driven by the start of the motor 2, and then the two groups of two symmetrically distributed threaded sleeves 6 are moved oppositely, and the two shells 7 are moved oppositely, the connecting frame 15 and the bearing 16 are moved when the shell 7 moves, the telescopic shaft 14 is stretched, thereby stretching the concrete, the data in the concrete stretching can be measured through the measurement center 8, and the concrete fixed in the shell 7 can be stretched through the above structure.

[0048] Embodiment 2:

[0049] The embodiment provides a concrete tensile deformation test device, in addition to the technical solutions of the above-mentioned embodiments, further having the following technical features, the moving assembly includes three synchronous wheels 4, the three synchronous wheels 4 are respectively fixedly sleeved on the two bidirectional screws 3 and the output shaft of the motor 2, and the same synchronous belt 5 is meshed and connected outside the three synchronous wheels 4.

[0050] Wherein, through the synchronous wheel 4 and the synchronous belt 5 arranged outside the two bidirectional screws 3 and the output shaft of the motor 2, the rotation of the two bidirectional screws 3 can be driven by the start of the motor 2.

[0051] Embodiment 3:

[0052] The embodiment provides a concrete tensile deformation test device, in addition to the technical solutions of the above-mentioned embodiments, further having the following technical features, the two bidirectional screws 3 are externally threadedly connected with two symmetrically distributed threaded sleeves 6, and one side of the threaded sleeve 6 is fixedly connected with the outside of the shell 7.

[0053] Wherein, the two groups of two symmetrically distributed threaded sleeves 6 are moved oppositely, and the two shells 7 are moved oppositely.

[0054] Embodiment 4:

[0055] The embodiment provides a concrete tensile deformation test device, in addition to comprising the technical scheme of the above embodiment, further has the following technical features, one side of the threaded rod 10 is provided with the clamping plate 11, both sides of the clamping plate 11 are slidably connected with the inner walls of the shell 7.

[0056] Wherein, since the clamping plate 11 is slidably installed in the shell 7, so that the clamping plate 11 does not rotate when moving.

[0057] Embodiment 5:

[0058] The embodiment provides a concrete tensile deformation test device, in addition to comprising the technical scheme of the above embodiment, further has the following technical features, the synchronous assembly includes the telescopic shaft 14, one end of the telescopic shaft 14 is connected with one end of the rotating shaft 13, the extension end of the telescopic shaft 14 is fixedly connected with the first bevel gear 17, the outer portion of the telescopic shaft 14 is fixedly connected with the handle 19.

[0059] Wherein, the shell 7 drives the connecting frame 15 and the bearing 16 to move when moving, and drives the telescopic shaft 14 to stretch.

[0060] Embodiment 6:

[0061] The embodiment provides a concrete tensile deformation test device, in addition to comprising the technical scheme of the above embodiment, further has the following technical features, the threaded sleeve 9 is fixedly connected with the second bevel gear 18 at one end outside the shell 7, and the first bevel gear 17 is meshingly connected with the second bevel gear 18.

[0062] Wherein, by holding the handle 19 and rotating, then the handle 19 drives the two telescopic shafts 14 and the first bevel gear 17 to rotate, since the first bevel gear 17 is meshingly connected with the second bevel gear 18, the rotation of the first bevel gear 17 can drive the second bevel gear 18 and the threaded sleeve 9 to rotate.

[0063] Embodiment 7:

[0064] The embodiment provides a concrete tensile deformation test device, in addition to comprising the technical scheme of the above embodiment, further has the following technical features, one side of the shell 7 is fixedly connected with the connecting frame 15, one side of the connecting frame 15 is provided with the mounting hole, the bearing 16 is arranged in the mounting hole, and the outer portion of the extension end of the telescopic shaft 14 is fixedly connected with the inner ring of the bearing 16.

[0065] Wherein, by setting the connecting frame 15 and the bearing 16, the shell 7 can drive the telescopic shaft 14 to stretch and contract when moving.

[0066] Working principle: in need to fix the concrete in the inside of two shell 7, first put the concrete in the inside of shell 7 at both ends, by holding the handle 19 rotation, then the handle 19 will drive two telescopic shaft 14 and first bevel gear 17 rotation, because the first bevel gear 17 and second bevel gear 18 meshing connection, can drive second bevel gear 18 and threaded sleeve 9 rotation through the rotation of first bevel gear 17, through the rotation of threaded sleeve 9, can drive threaded rod 10 and clamping plate 11 move, at this moment can be fixed in the inside of two shell 7 clamping plate 11, because the clamping plate 11 is slidingly installed in the inside of shell 7, so that the clamping plate 11 in moving, will not occur rotation phenomenon, through the above structure, can be fixed in the inside of two shell 7 when the concrete tensile deformation test, the concrete clamping, the device is fixed at the same time to the both ends of the concrete clamping, clamping force is consistent, avoid the concrete both ends clamping force is not consistent, will lead to the concrete in the process of stretching eccentric load, and then affect the accuracy of test results of the drawbacks, and then facilitate the staff to use.

[0067] In need to fix in the inside of shell 7 of concrete tensile test, through the synchronous pulley 4 and synchronous belt 5 arranged in the output shaft of motor 2 and two double screw 3 outside, can drive two double screw 3 rotation through the start of motor 2, then drive two groups of two symmetrically distributed threaded sleeve 6 move opposite, at this moment two shell 7 move opposite, shell 7 in moving, drive connecting frame 15 and bearing 16 move, drive telescopic shaft 14 stretch, so as to stretch the concrete, through the measurement center 8 arranged, can measure the data in the concrete tensile, through the above structure, can be fixed in the inside of shell 7 of concrete tensile test.

[0068] The embodiments of the application are described above in conjunction with the drawings, in the case of no conflict, the embodiments and the features in the embodiments of the application can be combined with each other, the application is not limited to the above specific embodiments, the above specific embodiments are only illustrative, but not limited, the ordinary skilled in the art can make many forms under the inspiration of the application, without departing from the scope of the application and the protection scope of the claims, all belong to the protection of the application.

Claims

1. A concrete tensile deformation test apparatus characterized by comprising: Include: Frame (1), the shape of the frame (1) is back-shaped, the inner wall of the frame (1) is fixedly installed with a motor (2), the inner wall of the frame (1) is rotatably connected with two symmetrical double screw rods (3), one side of the frame (1) is fixedly connected with a fixed plate (12), the top of the fixed plate (12) is rotatably connected with a rotating shaft (13), one side of the rotating shaft (13) extends to the other side of the fixed plate (12); Two housings (7) are slidably installed on the inner wall of the frame (1), the housing (7) is fixedly installed with a measuring center (8) on one side, the housing (7) is rotatably connected with a threaded sleeve (9) on one side, the threaded sleeve (9) extends to the inside of the housing (7), the threaded sleeve (9) is screw connected with a threaded rod (10) inside; The moving assembly is arranged in the inside of the frame (1), and is used for driving the two housings (7) to move; The synchronization assembly is arranged outside the two housings (7), and is used for driving the two threaded sleeves (9) to rotate simultaneously.

2. A concrete tensile deformation test apparatus according to claim 1, wherein The moving assembly includes three synchronous wheels (4), the three synchronous wheels (4) are respectively fixedly sleeved on the two double screw rods (3) and the output shaft of the motor (2), and the outside of the three synchronous wheels (4) is engagedly connected with the same synchronous belt (5).

3. A concrete tensile deformation test apparatus according to claim 2, wherein The outside of the double screw rod (3) is screw connected with two symmetrical threaded sleeves (6), and the outside of the threaded sleeve (6) is fixedly connected with the housing (7).

4. The apparatus for testing tensile deformation of concrete according to claim 1, wherein One side of the threaded rod (10) is provided with a clamping plate (11), and the two sides of the clamping plate (11) are slidably connected with the inner walls of the two housings (7).

5. The apparatus for testing tensile deformation of concrete according to claim 1, wherein The synchronization assembly includes a telescopic shaft (14), one end of the telescopic shaft (14) is connected with one end of the rotating shaft (13), the telescopic shaft (14) is fixedly connected with a first bevel gear (17) at the extension end, and the outside of the telescopic shaft (14) is fixedly connected with a handle (19).

6. A concrete tensile deformation test apparatus according to claim 5, wherein One end of the threaded sleeve (9) located outside the housing (7) is fixedly connected with a second bevel gear (18), and the first bevel gear (17) and the second bevel gear (18) are engagedly connected.

7. A concrete tensile deformation test apparatus according to claim 5, wherein One side of the housing (7) is fixedly connected with a connecting frame (15), one side of the connecting frame (15) is provided with a mounting hole, the inside of the mounting hole is provided with a bearing (16), and the outside of the extension end of the telescopic shaft (14) is fixedly connected with the inner ring of the bearing (16).

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