Building material breaking strength testing device

Abstract

The utility model provides a building material breaking strength testing device which comprises a first support, a second support, a bottom plate and a measuring separation blade, a T-shaped groove is formed in the bottom plate, and the lower portion of the first support and the lower portion of the second support are in sliding connection with the T-shaped groove through T-shaped blocks; a screw rod is arranged in the middle of the bottom plate, a left-hand thread and a right-hand thread are symmetrically arranged on the screw rod, and the first support and the second support are connected with the screw rod through first connecting plates respectively; and a sliding rod is arranged at the lower part of the measuring separation blade. The first support and the second support are connected through the screw rod, the first support and the second support can be driven at the same time after the screw rod is rotated, the distance between the first support and the second support can be adjusted according to test samples of different sizes, the requirements of test regulations are met, and the first support and the second support are provided with the slidable measuring separation blades, so that the measurement accuracy is improved. Workers can conveniently determine the distance between the support point of the support and the side face of the test sample, and the test requirements of different types of samples are met.

Description

Technical Field

[0001] This application relates to the technical field of building material performance tests, and particularly to a device for testing the flexural strength of building materials. Background Art

[0002] In the construction industry, building materials such as concrete paving bricks, natural stone bricks, and concrete curbstones are commonly used. When these materials are in use, they are easily trampled by pedestrians or rolled over by vehicles. Therefore, the flexural strength of these materials is an important test index. Existing test equipment needs to be used in conjunction with supports. By supporting the lower parts on both sides of the test sample through the supports, and then applying pressure to the middle position of the upper part of the test sample through the test equipment, the flexural strength of the building material can be tested through the pressure at the time of test fracture. However, different materials have different requirements for the support distance and position of the supports. For example, natural stone bricks require the distance between the two support points of the support to be ten times the thickness of the natural stone brick, while for concrete curbstones, the distance between the two support points of the support is required to be the total length minus 100 mm. Existing supports such as the multifunctional compression and flexure fixture disclosed in the Chinese patent with application number 201620788417.3 include a single pressure head mechanism, a double pressure head mechanism, and a support mechanism. The single pressure head mechanism is composed of a connection head and a connecting rod. Among them, a connection screw and a connection nut are provided at the top of the connection head, and the bottom of the connecting rod is connected to the double pressure head mechanism; a support mechanism is provided below the double pressure head mechanism, and this support mechanism is composed of a support roller, a support rod, a guide rod, a fixed hinge support, and a rolling hinge support. Among them, the support roller is slidably connected to the guide rod through the rolling hinge support. This device can only simply adjust the distance between the fixed hinge support and the rolling hinge support. For samples such as concrete curbstones that require the support distance to be calculated through the total length, the test personnel still need to measure to obtain the support distance. Therefore, a device for testing the flexural strength of building materials is needed, in which the two supports on the upper part can move synchronously to facilitate the adjustment of the distance, and a movable baffle is provided on the support to facilitate the experimenter to control the distance from the support to the side of the sample and improve the test efficiency. Summary of the Utility Model

[0003] To solve the above problems, this application proposes a device for testing the flexural strength of building materials, in which the two supports on the upper part can move synchronously to facilitate the adjustment of the distance, and a movable baffle is provided on the support to facilitate the experimenter to control the distance from the support to the side of the sample and improve the test efficiency.

[0004] This application is achieved through the following technical solutions:

[0005] The present application provides a flexural strength test device for building materials, including: a first support, a second support, a bottom plate, and a measuring baffle. A T-shaped groove is provided on the bottom plate, and the lower parts of the first support and the second support are respectively slidably connected to the T-shaped groove through T-shaped blocks; a screw rod is provided in the middle of the bottom plate, and a left-handed thread and a right-handed thread are symmetrically arranged on the screw rod. The first support and the second support are respectively connected to the screw rod through a first connecting plate; a sliding rod is provided at the lower part of the measuring baffle, and sliding grooves are respectively provided on the first support and the second support. The sliding rod is slidably connected to the sliding groove.

[0006] Further, a swing block is provided on the upper part of the first support, and the lower part of the swing block is installed in a U-shaped groove on the upper part of the first support through a rotating shaft.

[0007] Further, a support platform is provided on the second support, a support block is provided on the support platform, the support block is installed on the upper part of the support platform through a dovetail groove, and a second connecting plate is provided on one side of the support block. One end of the second connecting plate is fixedly connected to the support block, and the other end of the second connecting plate is connected to the support platform through a bolt.

[0008] Further, rollers are installed on the upper parts of the swing block and the support block, and through holes in the axial direction are provided on the rollers. The through holes are respectively connected to the swing block and the support block through pin shafts.

[0009] Further, the upper end of the measuring baffle is 30 mm to 50 mm higher than the roller.

[0010] Further, the swing block and the support block have multiple length specifications.

[0011] Further, locking nuts are provided on both the first support and the second support. The middle of the locking nut is connected to the first support and the second support through threads, and the end of the locking nut presses tightly on the sliding rod.

[0012] Further, a cylindrical block is provided at one end of the screw rod, a plurality of card slots are provided on the outer circumference of the cylindrical block, and a spring pin is fixedly installed on one side of the bottom plate. The end of the spring pin is inserted into the card slot.

[0013] Further, a regular hexagon blind hole is provided in the middle of the cylindrical block.

[0014] The beneficial effects of the present application: By using a screw rod to connect the first support and the second support, the first support and the second support can be simultaneously driven after rotating the screw rod. The distance between the first support and the second support can be adjusted according to test samples of different sizes to meet the requirements of the test regulations. Moreover, a slidable measuring baffle is provided on the first support and the second support, which is convenient for the staff to determine the distance from the support point of the support to the side of the test sample and meet the test requirements of different types of samples. Description of the Drawings

[0015] Figure 1 It is a structural schematic diagram of the present utility model;

[0016] Figure 2 It is a structural schematic diagram of the first support of the present utility model;

[0017] Figure 3 It is a structural schematic diagram of the second support of the present utility model;

[0018] In the figure: 1 - the first support, 2 - the second support, 3 - the bottom plate, 4 - the T-shaped groove, 5 - the T-shaped block, 6 - the screw rod, 7 - the first connecting plate, 8 - the measuring flap, 9 - the sliding rod, 10 - the sliding groove, 11 - the swinging block, 12 - the roller, 13 - the locking nut, 14 - the cylindrical block, 15 - the spring pin, 16 - the blind hole, 17 - the pin shaft, 18 - the support platform, 19 - the support block, 20 - the second connecting plate. Specific embodiments

[0019] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Among them, the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0021] In addition, the descriptions involving "first", "second", etc. in the present application are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the said features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0022] Such as Figures 1 to 3As shown in the figure, an embodiment of the present utility model provides a device for testing the flexural strength of building materials, including: a first support 1, a second support 2, a bottom plate 3, and a measuring flap 8. A T-shaped groove 4 is provided on the bottom plate 3. The lower parts of the first support 1 and the second support 2 are respectively slidably connected to the T-shaped groove 4 through T-shaped blocks 5. A screw rod 6 is provided in the middle of the bottom plate 3, and a left-handed thread and a right-handed thread are symmetrically arranged on the screw rod 6. The first support 1 and the second support 2 are respectively connected to the screw rod 6 through a first connecting plate 7. A sliding rod 9 is provided at the lower part of the measuring flap 8, and sliding grooves 10 are respectively provided on the first support 1 and the second support 2. The sliding rod 9 is slidably connected to the sliding groove 10.

[0023] During the test, for test samples such as natural stone bricks, the test standard stipulates that the distance between the support points of the first support 1 and the second support 2 is ten times the thickness of the natural stone brick. The staff measures the thickness with a caliper and calculates the distance between the support points of the first support 1 and the second support 2. Then, the worker pulls the spring pin 15 with one hand and turns the screw rod 6 with an inner hexagon wrench with the other hand. The screw rod 6 simultaneously pushes the first support 1 and the second support 2 to move through the left-handed thread and the right-handed thread. A scale is engraved on the bottom plate 3, and the tester can quickly determine the distance between the support points of the first support 1 and the second support 2 through the scale. After adjusting to the required position, the staff pulls out the inner hexagon wrench and simultaneously releases the spring pin 15, so that the end of the spring pin 15 is inserted into the slot on the side of the cylindrical block 14 to prevent the first support 1 and the second support 2 from loosening during the test. After placing the test sample on the upper parts of the first support 1 and the second support 2, the pressing head presses on the natural stone brick through the hydraulic cylinder, so as to measure the pressure at the time of fracture.

[0024] For test samples such as concrete curbstones, the test standard stipulates that the support points need to be 50 mm away from the side of the concrete curbstone. The distance between the two support points of the support is the total length minus 100 mm. For such tests, the staff first loosens the locking nut 13, then pulls the measuring flap 8 to adjust the position of the measuring flap 8 so that the distance from the side of the measuring flap 8 to the support point of the support is 50 mm, and then tightens the locking nut 13. The locking nut 13 presses the sliding rod 9 tightly in the sliding groove 10 to prevent the sliding rod 9 from sliding relative to the sliding groove 10, thus locking the position. After placing the concrete curbstone on the upper parts of the first support 1 and the second support 2, the worker pulls the spring pin 15 with one hand and turns the screw rod 6 with an inner hexagon wrench with the other hand. The screw rod 6 simultaneously pushes the first support 1 and the second support 2 to move through the left-handed thread and the right-handed thread. When the measuring flaps 8 on the first support 1 and the second support 2 are both in contact with the side of the concrete curbstone, the positions of the first support 1 and the second support 2 at this time meet the requirements of the test standard. The staff pulls out the inner hexagon wrench and simultaneously releases the spring pin 15, so that the end of the spring pin 15 is inserted into the slot on the side of the cylindrical block 14 to prevent the first support 1 and the second support 2 from loosening during the test. The pressing head presses on the natural stone brick through the hydraulic cylinder, so as to measure the pressure at the time of fracture.

[0025] In a preferred embodiment, a swing block 11 is provided on the upper part of the first support 1. The lower part of the swing block 11 is installed in the U-shaped groove on the upper part of the first support 1 through a rotating shaft. The swing block 11 can deflect slightly to facilitate the swing block 11 to adapt to the lower end face of the test sample, so that the lower part of the test sample is uniformly supported by the first support 1 and the second support 2 during detection. And the swing block 11 can be taken out of the U-shaped groove for replacement, so that the roller 12 on the upper part of the swing block 11 can effectively support the test sample.

[0026] In a specific embodiment, a support platform 18 is provided on the second support 2, and a support block 19 is provided on the support platform 18. The support block 19 is installed on the upper part of the support platform 18 through a dovetail groove. And a second connecting plate 20 is provided on one side of the support block 19. One end of the second connecting plate 20 is fixedly connected to the support block 19, and the other end of the second connecting plate 20 is connected to the support platform 18 through a bolt. The support platform 18 provides a support force for the support block 19, and the support platform 18 then supports the roller 12, thereby supporting the test sample. The support block 19 is made of steel, and the thickness of the lower part of the support block 19 is greater than 30 mm, so that when the support block 19 is in a cantilever state, the support block 19 has sufficient structural strength to support the roller 12.

[0027] In a preferred embodiment, rollers 12 are installed on both the upper parts of the swing block 11 and the support block 19, and axial through holes are provided on the rollers 12. The through holes are respectively connected to the swing block 11 and the support block 19 through pin shafts 17. When the pin shafts 17 are inserted, the rollers 12 are locked, and when the pin shafts 17 are pulled out, the rollers 12 can rotate to facilitate meeting the requirements of different test standards for the support points.

[0028] In a specific embodiment, the upper end of the measuring flap 8 is 30 mm to 50 mm higher than the roller 12, so that the upper part of the measuring flap 8 can contact the side surface of the test sample, which is convenient for determining the distance from the side surface of the test sample to the support point through the measuring flap 8.

[0029] Specifically, the swing block 11 and the support block 19 have various length specifications, and the staff can replace the swing block 11 and the support block 19 with different lengths according to the different widths of the test samples to meet the requirements of different test samples for the supports.

[0030] Specifically, as Figure 2 、 Figure 3 shown, locking nuts 13 are provided on both the first support 1 and the second support 2. The middle part of the locking nut 13 is connected to the first support 1 and the second support 2 through threads. The end part of the locking nut 13 presses tightly on the sliding rod 9. The measuring flap 8 is slidably connected to the chute 10 through the sliding rod 9, which is convenient for adjusting the position of the measuring flap 8 to meet the test requirements of different test samples.

[0031] Specifically, one end of the screw rod 6 is provided with a cylindrical block 14, and a plurality of card slots are arranged on the outer periphery of the cylindrical block 14. One side of the bottom plate 3 is fixedly installed with a spring pin 15, and the end of the spring pin 15 is inserted into the card slot. A spring is arranged in the spring pin 15, which can push the bolt to extend towards the cylindrical block 14. When the spring pin 15 is inserted into the card slot, it can limit the rotation of the screw rod 6, thereby avoiding the rotation of the screw rod 6 during the test, and ensuring that the first support 1 and the second support 2 maintain their positions unchanged.

[0032] Specifically, a regular hexagonal blind hole 16 is arranged in the middle of the cylindrical block 14, which is convenient for staff to rotate the cylindrical block 14 and the screw rod 6 through an inner hexagon wrench, so as to move the first support 1 and the second support 2.

[0033] Specifically, as Figure 3 shown, scales are arranged on the first support 1 and the second support 2, and a pointer is arranged on the sliding rod 9. Staff can judge the distance from the side of the measuring flap 8 to the support position according to the scale line pointed by the pointer, which is convenient for quickly moving the measuring flap 8 to the required position.

[0034] Preferably, the measuring flap 8 is made of plastic material. During the test, the measuring flap 8 can have slight deformation to avoid interfering with the test results.

[0035] Certainly, the present application can also have many other implementation manners. Based on this implementation manner, other implementation manners obtained by ordinary technical personnel in the field without any creative labor belong to the scope protected by the present application.

Claims

1. A flexural strength test device for building materials, characterized in that, Including: A first support (1), a second support (2), a base plate (3), and a measuring flap (8). A T-shaped groove (4) is provided on the base plate (3). The lower parts of the first support (1) and the second support (2) are respectively slidably connected to the T-shaped groove (4) through T-shaped blocks (5). A screw rod (6) is provided in the middle of the base plate (3). Left-handed threads and right-handed threads are symmetrically arranged on the screw rod (6). The first support (1) and the second support (2) are respectively connected to the screw rod (6) through first connecting plates (7). A sliding rod (9) is provided at the lower part of the measuring flap (8). Sliding grooves (10) are respectively provided on the first support (1) and the second support (2). The sliding rod (9) is slidably connected to the sliding grooves (10).

2. The flexural strength test device for building materials according to claim 1, wherein, A swing block (11) is provided on the upper part of the first support (1). The lower part of the swing block (11) is installed in a U-shaped groove on the upper part of the first support (1) through a rotating shaft.

3. The flexural strength test device for building materials according to claim 2, wherein, A support platform (18) is provided on the second support (2). A support block (19) is provided on the support platform (18). The support block (19) is installed on the upper part of the support platform (18) through a dovetail groove. And a second connecting plate (20) is provided on one side of the support block (19). One end of the second connecting plate (20) is fixedly connected to the support block (19), and the other end of the second connecting plate (20) is connected to the support platform (18) through a bolt.

4. The flexural strength test device for building materials according to claim 3, characterized in that, Rollers (12) are installed on the upper parts of the swing block (11) and the support block (19). And through holes are provided axially on the rollers (12). The through holes are respectively connected to the swing block (11) and the support block (19) through pin shafts (17).

5. The flexural strength test device for building materials according to claim 4, characterized in that, The upper end of the measuring flap (8) is 30 mm to 50 mm higher than the roller (12).

6. The flexural strength test device for building materials according to claim 3, characterized in that, The swing block (11) and the support block (19) have multiple length specifications.

7. The flexural strength test device for building materials according to claim 1, characterized in that, Locking nuts (13) are provided on both the first support (1) and the second support (2). The middle parts of the locking nuts (13) are connected to the first support (1) and the second support (2) through threads. The ends of the locking nuts (13) are tightly pressed on the sliding rod (9).

8. The flexural strength test device for building materials according to claim 1, wherein, A cylindrical block (14) is provided at one end of the screw rod (6). A plurality of card slots are provided on the outer periphery of the cylindrical block (14). A spring pin (15) is fixedly installed on one side of the base plate (3). The end of the spring pin (15) is inserted into the card slot.

9. The flexural strength test device for building materials according to claim 8, characterized in that, A regular hexagonal blind hole (16) is provided in the middle of the cylindrical block (14).

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