Durability test device for precast concrete parts

Abstract

The present invention discloses a durability test device for precast concrete parts, comprising a base fixedly connected to a mounting plate for supporting a sample to be tested, and a support plate and a second fixed rod fixedly connected to the upper surface of the mounting plate, a hammer detection device is arranged at the upper end of the mounting plate, the hammer detection device comprises a hammer rod rotatably connected to the upper end of the support plate through a pin shaft, a counterweight is installed at one end of the hammer rod away from the support plate, a hammer head for striking the precast concrete parts is limitedly rotatably connected at the lower end of the counterweight, the center of the hammer head is directly opposite to the center of the base, a rotating rod is rotatably connected at the upper end of the second fixed rod, a rotating seat is fixedly connected on the upper end of the rotating rod, a roller is rotatably connected at one end of the rotating seat away from the rotating rod, and a top block is arranged on the side of the hammer rod close to the rotating rod. The present invention can realize a friction experiment while performing a hammer detection, and can also perform a scratch test, which can increase the service life of the detection surface and detect the degree of resistance to hammering when the surface is worn.

Description

Technical Field

[0001] The invention relates to the technical field of concrete prefabricated part detection, in particular to a concrete prefabricated part durability testing device. Background Art

[0002] Floor tiles are a kind of floor decoration material, also called concrete prefabricated parts. They are made of clay and have various specifications. They are hard, light in bulk density, resistant to pressure and wear, and moisture-proof. They are glazed for decoration. They are mostly used for the ground and floors of public and civil buildings.

[0003] Most of the existing devices use hammer testing to simulate the situation of people walking on the precast concrete parts and heavy objects squeezing them when testing the service life, and judge the service life by judging the number of hammer blows. However, in the actual use of precast concrete parts, when people walk on the surface of the precast concrete parts, the soles of their shoes and the ground will also cause friction on the surface of the precast concrete parts, and after the surface is worn, the overall strength of the precast concrete parts will also decrease. Just a simple hammer test cannot accurately judge the service life of the precast concrete parts. Summary of the invention

[0004] The purpose of the present invention is to provide a durability testing device for precast concrete parts, which has the advantages of being able to perform friction experiments while performing hammer tests, and also being able to perform scratch tests, thereby increasing the service life of the test surface and being able to test the degree of resistance to hammering when the surface is worn, thereby solving the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a concrete precast part durability testing device, comprising a base fixedly connected to a mounting plate for supporting a sample to be tested, and a support plate and a second fixed rod fixedly connected to the upper surface of the mounting plate, the upper end of the mounting plate is provided with a hammer detection device, the hammer detection device comprises a hammer rod rotatably connected to the upper end of the support plate through a pin shaft, a counterweight block is installed on the end of the hammer rod away from the support plate, the lower end of the counterweight block is limitedly rotatably connected with a hammer head for striking the concrete precast part, the center of the hammer head is opposite to the center of the base, the upper end of the second fixed rod is rotatably connected with a rotating rod, the upper end of the rotating rod is fixedly connected with a rotating seat, the end of the rotating seat away from the rotating rod is rotatably connected with a roller, and a top block is provided on the side of the hammer rod close to the rotating rod.

[0006] Preferably, the hammer detection device also includes a friction test device for detecting the wear resistance of the surface, the friction test device includes a counter fixedly connected to the rotating rod, the end of the counter away from the rotating rod is fixedly connected to a gear ring bar, an inner cavity is opened inside the counterweight block, the position of the counterweight block in the inner cavity is rotatably connected to a rotating shaft 2, the lower end of the rotating shaft 2 is fixedly connected to a hammer head, the counterweight block is rotatably connected to a rotating shaft 1, one end of the rotating shaft 1 close to the rotating shaft 2 and one end of the rotating shaft 2 close to the rotating shaft 1 are both provided with bevel gears and the two bevel gears are meshed with each other, the end of the rotating shaft 1 located outside the counterweight block is fixedly connected to a gear, the gear ring bar can drive the gear to rotate after meshing with the gear, and the gear ring bar and the gear are located in the same horizontal plane.

[0007] The top end of the lifting plug in the lifting plug has the spring that is fixedly provided with a spring, and the bottom end of the lifting plug in the lifting plug has the spring that is fixedly provided with a spring, and the bottom end of the lifting plug is fixedly provided with a spring, and the bottom end of the lifting plug is fixedly provided with a spring.

[0008] Preferably, the friction test device further comprises an adjusting device for adjusting the scratch test angle, wherein the adjusting device comprises a convex tooth fixedly connected to the arc-shaped contour of the hammer head, and the convex tooth is meshed with a toothed belt.

[0009] Preferably, a support rod is installed on the support plate, and a spring for pushing the hammer rod to rotate on the support plate is connected between the hammer rod and the support rod via a rotating assembly.

[0010] Preferably, the top block is a right triangle and when the roller pushes the top block, the top block can push the hammer rod to rotate on the support plate.

[0011] Preferably, a connecting frame is provided on the second fixed rod, a pressure switch is provided on the upper end of the connecting frame, a protrusion is fixedly connected to the arc profile of the rotating rod, and the pressure switch is pressed once by the protrusion every time the rotating rod rotates one circle.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. One circle of the rotating rod will drive the roller to rotate one circle, thereby pushing the hammer rod to rotate, so that the counterweight block can knock against the base. Each time it knocks, the connecting frame can record a number, so the service life of the connecting frame can be directly judged by the number on the connecting frame.

[0014] 2. During the hammer test, the rotating rod will also drive the gear ring to drive the gear to rotate, so that the hammer head can rotate. The rotation of the hammer head can realize the friction function on the surface of the precast concrete part, and can detect the service life of the surface of the precast concrete part. At the same time, it can also detect the degree of tolerance of the precast concrete part to hammering under different friction levels on the surface.

[0015] 3. During the hammering process, when the counterweight rises to accumulate force, the connecting frame is pulled by the pull rope to drive the toothed belt to move. The movement of the toothed belt will drive the screw to scratch the surface of the concrete prefabricated part, thereby further increasing the test of surface wear resistance.

[0016] 4. While the hammer head rotates to realize the wear resistance test, the toothed belt will also be driven to rotate through the convex teeth, thereby driving the screw to move through the toothed belt, realizing the function of adjusting the screw position in a small range, thereby realizing the function of scratching at different positions. At the same time, it can detect the degree of tolerance of concrete prefabricated parts to hammering under different scratch coverage and different scratch depths. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the left side perspective of the overall structure;

[0018] Figure 2 It is a schematic diagram of the right side perspective of the overall structure;

[0019] Figure 3 It is a structural schematic diagram of the top block part;

[0020] Figure 4 It is a structural schematic diagram of the counterweight block part;

[0021] Figure 5 It is a schematic diagram of the structure inside the counterweight block;

[0022] Figure 6 It is a schematic diagram of the structure of the convex tooth.

[0023] In the figure: 01, mounting plate; 02, base; 03, counterweight; 04, hammer rod; 05, support plate; 06, connecting frame; 07, fixed rod 1; 08, sliding sleeve; 09, pull rope; 10, limit plate; 11, fixed rod 2; 12, rotating rod; 13, top block; 14, roller; 15, rotating seat; 16, counter; 17, toothed ring strip; 18, support rod; 19, spring; 20, toothed belt; 21, screw; 22, gear; 23, pull plate; 24, top plate; 25, bump; 26, pressure switch; 27, rotating shaft 1; 28, hammer head; 29, tension spring; 30, connecting block; 31, bevel gear; 32, rotating shaft 2; 33, inner cavity; 34, convex tooth. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figures 1 to 3 A durability testing device for precast concrete parts comprises a base 02 fixedly connected to a mounting plate 01 for supporting a sample to be tested, and a support plate 05 and a fixing rod 11 fixedly connected to the upper surface of the mounting plate 01. A hammer detection device is arranged at the upper end of the mounting plate 01, and the hammer detection device comprises a hammer rod 04 rotatably connected to the upper end of the support plate 05 through a pin shaft, a counterweight block 03 is installed at one end of the hammer rod 04 away from the support plate 05, a hammer head 28 for striking the precast concrete parts is rotationally connected at the lower end of the counterweight block 03, and the center of the hammer head 28 faces the center of the base 02, a rotating rod 12 is rotationally connected to the upper end of the fixing rod 11, a rotating seat 15 is fixedly connected to the upper end of the rotating rod 12, a roller 14 is rotationally connected to the end of the rotating seat 15 away from the rotating rod 12, and a top block 13 is arranged on the side of the hammer rod 04 close to the rotating rod 12.

[0026] In this embodiment, when fixing the sample on the base 02, as in the existing device, a hole can be drilled on the sample and then fixed with bolts or self-tapping screws, or the sample can be fixed with clamping devices on both sides. When the device is in use, the rotating rod 12 can be driven to rotate by a power mechanism, so that the device as a whole can work. For example, a motor is used to reduce the output shaft through a reduction gear box and then directly fixed to the rotating rod 12, so that the rotating rod 12 can be driven to rotate by the motor.

[0027] See also Figure 1 , Figure 2 , Figure 4 and Figure 5Preferably, the hammer detection device also includes a friction test device for detecting the wear resistance of the surface, the friction test device includes a counter 16 fixedly connected to the rotating rod 12, the end of the counter 16 away from the rotating rod 12 is fixedly connected to a toothed ring strip 17, an inner cavity 33 is opened inside the counterweight block 03, the position of the counterweight block 03 located in the inner cavity 33 is rotatably connected to a rotating shaft 2 32, the lower end of the rotating shaft 2 32 is fixedly connected to a hammer head 28, the counterweight block 03 is rotatably connected to a rotating shaft 1 27, one end of the rotating shaft 1 27 close to the rotating shaft 2 32 and the end of the rotating shaft 2 32 close to the rotating shaft 1 27 are both provided with a bevel gear 31 and the two bevel gears 31 are meshed with each other, the end of the rotating shaft 1 27 located outside the counterweight block 03 is fixedly connected to a gear 22, the toothed ring strip 17 can drive the gear 22 to rotate after meshing with it, and the toothed ring strip 17 and the gear 22 are located in the same horizontal plane.

[0028] In this embodiment, the hammer head 28 can be made of a hard rubber material, and a raised friction pattern is arranged on its lower surface. This can ensure that when the hammer hits the prefabricated concrete part, it can play a certain buffering role and prevent direct rigid contact, thereby causing the prefabricated concrete part to directly break. The friction pattern can play a friction role.

[0029] See also Figure 1 , Figure 2 and Figure 4 Preferably, the hammer detection device also includes a scratch test device, which includes two fixed rods 07 fixedly connected to the upper surface of the mounting plate 01, the upper ends of the two fixed rods 07 are fixedly connected to the sliding sleeves 08, the upper limit sliding connection of the two sliding sleeves 08 is connected to the connecting frame 06, the connecting frame 06 is sleeved on the outer periphery of the upper end of the base 02, and the end of the connecting frame 06 away from the support plate 05 is rotatably connected to the connecting block 30 through the pin shaft, and is rotatably connected to the toothed belt 20 through the connecting block 30, and the toothed belt 20 is provided with a threaded through hole and a through hole. A screw 21 is threadedly connected through the threaded through hole, and the upper surface of the mounting plate 01 is fixedly connected to the limiting plate 10. The upper end of the limiting plate 10 is slidably connected to a pull rope 09. The two ends of the pull rope 09 are respectively fixedly connected to the lower surface of the hammer rod 04 and the middle position of one side surface of the connecting frame 06 close to the limiting plate 10. A pull plate 23 is fixedly connected between the two sliding sleeves 08. A tension spring 29 for resetting the connecting frame 06 is fixedly connected between the pull plate 23 and the connecting frame 06. A top plate 24 is fixedly connected to the side surface of the connecting frame 06 away from the pull rope 09.

[0030] In this embodiment, the position of the screw 21 and the surface of the precast concrete part can be adjusted by rotating the screw 21 before use, so as to adjust the force to adapt to different thicknesses of plates and the force of scratching. The lower end of the screw 21 is in the shape of a cone without a pointed head. A round block or a nut head can be added to the upper end of the screw 21 for easy rotation.

[0031] See also Figure 1, Figure 2 , Figure 4 and Figure 6 Preferably, the friction test device also includes an adjustment device for adjusting the scratch test angle, the adjustment device includes a convex tooth 34 fixedly connected to the arc profile of the hammer head 28, and the convex tooth 34 is engaged with the toothed belt 20.

[0032] When the toothed ring bar 17 drives the gear 22 to rotate to drive the hammer head 28 to rotate to realize the friction experiment, the rotation of the hammer head 28 will also drive the convex tooth 34 to move at the same time. Whenever the convex tooth 34 moves to the position of the toothed belt 20, the convex tooth 34 will push the toothed belt 20 to rotate on the connecting frame 06, thereby driving the toothed belt 20 to rotate slightly. After the toothed ring bar 17 drives the hammer head 28 to rotate a few circles, the hammer head 28 will drive the toothed belt 20 to rotate a small length through the convex tooth 34, thereby driving the screw 21 to move slightly, thereby realizing the function of adjusting the position of the screw 21, so that the position of the scratch will be switched each time after a scratching action is performed.

[0033] See also Figure 1 and Figure 2 Preferably, a support rod 18 is installed on the support plate 05, and a spring 19 for pushing the hammer rod 04 to rotate on the support plate 05 is connected between the hammer rod 04 and the support rod 18 through a rotating assembly.

[0034] In this embodiment, the spring 19 can accelerate the movement of the counterweight 03 toward the base 02 to ensure the strength of the hammering. In addition, the elastic force of the spring 19 can also be used to push the hammer rod 04, so that the hammer rod 04 pushes the counterweight 03 to keep pressing against the base 02, thereby ensuring the strength of the hammer head 28 when rotating to perform the friction experiment. Ensure the effect of friction.

[0035] See also Figures 1 to 3 Preferably, the top block 13 is a right triangle and when the roller 14 pushes the top block 13, the top block 13 can push the hammer rod 04 to rotate on the support plate 05. The top block 13 is pushed to move when the roller 14 rotates in a circle, so that the top block 13 pushes the hammer rod 04 to rotate on the support plate 05.

[0036] See also Figure 1 and Figure 3 Preferably, a connecting frame 06 is provided on the fixing rod 11, a pressing switch 26 is provided on the upper end of the connecting frame 06, a protrusion 25 is fixedly connected to the arc profile of the rotating rod 12, and the pressing switch 26 is pressed once by the protrusion 25 every time the rotating rod 12 rotates one circle. The counting function is realized, because the entire detection process is realized once each time the rotating rod 12 rotates, the service life of the concrete precast part can be judged according to the number of circles the rotating rod 12 rotates.

[0037] Working principle: fix the concrete prefabricated sample to the upper surface of the base 02. When the rotating rod 12 rotates, it will drive the rotating seat 15 to drive the roller 14 to rotate in a circle with the rotating rod 12 as the axis. When the roller 14 rotates in a circle, it will push the top block 13 to push the hammer rod 04 to rotate on the support plate 05, so that the counterweight block 03 will be lifted up and out of contact with the base 02. When the roller 14 passes over the top block 13, it will no longer continue to support the top block 13, so that the counterweight block 03 will quickly hit the base 02 under the action of gravity and the action of the spring 19 pushing the hammer rod 04 to reset. Each time the rotating rod 12 rotates one circle, the hammer rod 04 will be knocked.

[0038] The service life of the concrete prefabricated part can be judged according to the total number of knocks when it breaks. And every time the rotating rod 12 rotates one circle, the protrusion 25 presses the pressing switch 26 once, so that the connecting frame 06 records a number, and the reading of the connecting frame 06 can clearly and accurately judge the service life of the sample.

[0039] After the hammering is completed, when the counterweight 03 is attached to the base 02, as the rotating rod 12 continues to rotate, the counter 16 will be driven to drive the gear ring 17 to rotate with the rotating rod 12 as the axis, so that the gear ring 17 will drive the gear 22 to rotate, and the rotation of the gear 22 will drive the rotating shaft 1 27 to rotate. The rotating shaft 1 27 will make the rotating shaft 2 32 rotate on the counterweight 03 through the bevel gear 31. When the rotating shaft 2 32 rotates, it will achieve friction on the floor.

[0040] Compared with most existing devices, the present invention can not only realize hammer detection but also conduct wear resistance test on the surface of precast concrete parts, so as to detect the service life of the surface. In addition, in the actual use of precast concrete parts, different heavy objects will be placed on the floor and people will keep walking on the surface, which will cause different degrees of friction. The overall toughness of the precast concrete parts will be destroyed after being worn. At this time, when the hammer test is carried out again, the service life of the precast concrete parts in the actual use process can be detected.

[0041] When the toothed ring bar 17 is disengaged from the gear 22, the hammer head 28 no longer rotates. As the rotating rod 12 continues to rotate, the roller 14 will be driven to push the top block 13 again to push the hammer rod 04 to rotate on the support plate 05, thereby driving the counterweight block 03 to lift upward. In the process of the hammer rod 04 driving the counterweight block 03 to lift upward, the pull rope 09 will be pulled to pull the connecting frame 06 on the sliding sleeve 08 to move in the direction close to the limit plate 10. The tension spring 29 is stretched by the connecting frame 06 in cooperation with the pull plate 23. At the same time, the connecting frame 06 will drive the toothed belt 20 to move at the same time, and the toothed belt 20 will drive the screw 21 to move at the same time. In the process of the movement of the screw 21, when it moves to the position of the precast concrete part, the surface of the precast concrete part will be scratched through the pointed tip at its lower end. When the roller 14 is out of contact with the top block 13, the hammer rod 04 will return to its initial position under the elastic recovery effect of the tension spring 29 during its falling process, and the screw 21 will scratch the surface of the concrete precast part again.

[0042] Compared with the existing device, the surface service life detection is further realized. The effect of sharp heavy objects scratching the surface of the concrete prefabricated part can be simulated to detect its scratch resistance effect. At the same time, after the scratches are present, the counterweight block 03 is hammered to detect the service life of the floor when it is squeezed by heavy objects after the scratches are present.

[0043] When the toothed ring bar 17 drives the gear 22 to rotate to drive the hammer 28 to rotate to realize the friction experiment, the rotation of the hammer 28 will also drive the convex teeth 34 to move at the same time. Whenever the convex teeth 34 move to the position of the toothed belt 20, the convex teeth 34 will push the toothed belt 20 to rotate on the connecting frame 06, thereby driving the toothed belt 20 to rotate slightly. After the toothed ring bar 17 drives the hammer 28 to rotate a few circles, the hammer 28 will drive the toothed belt 20 to rotate a small length through the convex teeth 34, thereby driving the screw 21 to move slightly, thereby realizing the function of adjusting the position of the screw 21, so that each time after a scratching action is performed, the scratching position will be switched. Thus, the scratching function of different positions of the concrete precast parts is realized.

[0044] During the hammer test, the degree of tolerance to hammering can be realized when the scratches are all over the surface of the precast concrete part to different degrees. And after the scratches are all over the precast concrete part, as the scratching work continues, the screw 21 will make further scratches at the original scratch depth, so as to detect the degree of tolerance to hammering of the precast concrete part when the scratches are at different depths on the precast concrete part.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A durability testing device for precast concrete parts, comprising a base (02) fixedly connected to a mounting plate (01) for supporting a sample to be tested, and a support plate (05) and a second fixing rod (11) fixedly connected to the upper surface of the mounting plate (01), characterized in that: The upper end of the mounting plate (01) is provided with a hammer detection device, the hammer detection device comprising a hammer rod (04) rotatably connected to the upper end of the support plate (05) via a pin shaft, a counterweight block (03) is installed on the end of the hammer rod (04) away from the support plate (05), the lower end of the counterweight block (03) is limitedly rotatably connected to a hammer head (28) for striking the concrete prefabricated part, the center of the hammer head (28) is directly opposite to the center of the base (02), the upper end of the second fixed rod (11) is rotatably connected to a rotating rod (12), the upper end of the rotating rod (12) is fixedly connected to a rotating seat (15), the end of the rotating seat (15) away from the rotating rod (12) is rotatably connected to a roller (14), and a top block (13) is provided on the side of the hammer rod (04) close to the rotating rod (12); The hammer detection device also includes a friction test device for detecting the wear resistance of a surface, the friction test device including a connecting rod fixedly connected to the rotating rod (12), one end of the connecting rod away from the rotating rod (12) being fixedly connected to a toothed ring strip (17), an inner cavity (33) being provided inside the counterweight block (03), a position of the counterweight block (03) located in the inner cavity (33) being rotatably connected to a second rotating shaft (32), a lower end of the second rotating shaft (32) being fixedly connected to a hammer head (28), and the counterweight block (03) is rotatably connected to a rotating shaft 1 (27), one end of the rotating shaft 1 (27) close to the rotating shaft 2 (32) and one end of the rotating shaft 2 (32) close to the rotating shaft 1 (27) are both provided with a bevel gear (31), and the two bevel gears (31) are meshed with each other, and one end of the rotating shaft 1 (27) located outside the counterweight block (03) is fixedly connected to a gear (22), and the gear ring bar (17) can drive the gear (22) to rotate after meshing with the gear (22), and the gear ring bar (17) and the gear (22) are located in the same horizontal plane; A support rod (18) is mounted on the support plate (05), and a spring (19) for pushing the hammer rod (04) to rotate on the support plate (05) is connected between the hammer rod (04) and the support rod (18) via a rotating assembly; The top block (13) is a right-angled triangle, and when the roller (14) pushes the top block (13), the top block (13) can push the hammer rod (04) to rotate on the support plate (05).

2. A durability testing device for precast concrete parts according to claim 1, characterized in that: The hammer detection device also includes a scratch test device, which includes two fixed rods (07) fixedly connected to the upper surface of the mounting plate (01), the upper ends of the two fixed rods (07) are fixedly connected to a sliding sleeve (08), the upper limit position of the two sliding sleeves (08) is slidably connected to a connecting frame (06), the connecting frame (06) is sleeved on the outer periphery of the upper end of the base (02), the end of the connecting frame (06) away from the support plate (05) is rotatably connected to a connecting block (30) through a pin shaft, and is rotatably connected to a toothed belt (20) through the connecting block (30), the toothed belt (20) is provided with a threaded through hole and is driven by the threaded through hole A screw (21) is threadedly connected, the upper surface of the mounting plate (01) is fixedly connected to a limit plate (10), the upper end of the limit plate (10) is slidably connected to a pull rope (09), the two ends of the pull rope (09) are respectively fixedly connected to the lower surface of the hammer rod (04) and the middle position of a side surface of the connecting frame (06) close to the limit plate (10), a pull plate (23) is fixedly connected between the two sliding sleeves (08), a tension spring (29) for resetting the connecting frame (06) is fixedly connected between the pull plate (23) and the connecting frame (06), and a top plate (24) is fixedly connected to a side surface of the connecting frame (06) away from the pull rope (09).

3. The durability testing device for precast concrete parts according to claim 1, characterized in that: The friction test device also includes an adjustment device for adjusting the scratch test angle, the adjustment device including a convex tooth (34) fixedly connected to the arc-shaped profile of the hammer head (28), the convex tooth (34) meshing with the toothed belt (20).

4. The durability testing device for precast concrete parts according to claim 1, characterized in that: The second fixed rod (11) is provided with a counter (16), and the upper end of the counter (16) is provided with a sheet pressing switch (26). A protrusion (25) is fixedly connected to the arc-shaped contour of the rotating rod (12), and the sheet pressing switch (26) is pressed once by the protrusion (25) every time the rotating rod (12) rotates one circle.

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