A device for testing the wear resistance of concrete with dual mineral powder admixture

Abstract

This utility model discloses a device for testing the wear resistance of concrete with double mineral powder admixture, including a base. A bracket is fixedly connected to the top edge of the base, a controller is fixed to the left side of the bracket, and a lifting mechanism is installed on the left side of the bracket. The lifting mechanism includes a fixed seat fixed to the middle of the bracket, a servo motor fixed to the rear of the fixed seat, a gear fixedly connected to the output shaft of the servo motor, a bushing sleeve fitted to the outside of the bracket, a rack welded to the right side of the bushing, the rack meshing with the gear, a mounting base fixedly connected to the bottom end of the rack, a fixing plate mounted on the right side of the mounting base, and a water grinding mechanism provided on the right side of the fixing plate. This utility model, by setting up a water grinding mechanism, precisely washes the grinding area of ​​the concrete block sample, simulating water grinding conditions. Water is rinsed while the grinding disc grinds, keeping the grinding area cool and reducing dust splashing.

Description

Technical Field

[0001] This utility model relates to the field of testing technology for concrete with double mineral powder admixture, specifically a device for testing the wear resistance of concrete with double mineral powder admixture. Background Technology

[0002] During long-term use, concrete surfaces are subjected to various physical abrasion effects, such as vehicle rolling, mechanical friction, and gravel erosion. To improve the durability and service life of concrete, researchers have recently proposed incorporating mineral admixtures into concrete to optimize its internal structural properties, with double-admixed mineral powder concrete being the most common.

[0003] Double-blended mineral powder concrete usually refers to ordinary concrete in which two different types of mineral materials are added at the same time, such as fly ash and slag powder, silica fume and mineral powder, etc. After such materials are added, the microstructure of concrete can be improved, the density and crack resistance can be increased. The concrete surface is subjected to high-frequency wear for a long time, so its wear resistance has become a key indicator in material performance evaluation and engineering selection.

[0004] Currently, the most common method for testing the abrasion resistance of concrete is dry grinding. This typically involves using a rotating grinding disc or wheel to rub the surface of the concrete sample. After the test, the sample's mass is measured by weighing, specifically by measuring the difference in mass before and after grinding to calculate the amount of wear. This method is simple to implement and provides intuitive data, and is therefore widely used in the industry.

[0005] However, current concrete abrasion resistance testing devices on the market still have some shortcomings, such as:

[0006] Existing testing equipment mostly uses dry grinding, which cannot simulate the wear environment commonly seen in actual engineering, such as the wear environment under conditions of port terminals, tunnels, or rainwater erosion. This leads to deviations between test results and actual conditions.

[0007] Therefore, there is an urgent need for a device to test the wear resistance of concrete with dual mineral powder admixture, in order to solve the above-mentioned technical defects. Utility Model Content

[0008] The purpose of this invention is to provide a device for testing the wear resistance of double-blended mineral powder concrete, in order to solve the problem mentioned in the background art that most existing testing equipment adopts dry grinding and cannot simulate the "water grinding" or "wet grinding" commonly found in actual engineering.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a device for testing the wear resistance of double-blended mineral powder concrete, comprising a base, a bracket fixedly connected to the top edge of the base, a controller fixedly fixed to the left side of the bracket, and a lifting mechanism installed on the left side of the bracket; the lifting mechanism includes a fixed seat fixed to the middle of the bracket, a servo motor fixedly fixed behind the fixed seat, a gear fixedly connected to the output shaft of the servo motor, a bushing sleeve sleeved on the outside of the bracket, a rack welded to the right side of the bushing, the rack meshing with the gear, a mounting base fixedly connected to the bottom end of the rack, a fixing plate mounted on the right side of the mounting base, and a water grinding mechanism provided on the right side of the fixing plate; the water grinding mechanism includes a water tank placed on the right side of the base, a water pump installed at the top of the water tank, a nozzle installed at the bottom right side of the fixing plate, and a hose connected between the output end of the water pump and the nozzle.

[0010] As a further technical solution of this utility model, an electric grinding mechanism is installed at the fixed plate. The electric grinding mechanism includes a cylinder fixed to the top of the fixed plate. An electric grinder is fixedly installed at the bottom of the piston rod of the cylinder. A grinding disc is fixedly assembled on the output shaft of the electric grinder. The grinding disc is disc-shaped and located on the left side of the nozzle.

[0011] As a further technical solution of this utility model, a buckle is fixed on the right side of the fixing plate, and a locking bolt is fixedly connected between the buckle and the fixing plate.

[0012] As a further technical solution of this utility model, the mounting base and the fixing plate are fixedly connected by assembly bolts, and the right side of the mounting base is provided with a cavity for the fixing plate to be inserted.

[0013] As a further technical solution of this utility model, the gear is installed in front of the fixed seat, and the rack and the mounting seat form an "L"-shaped lifting structure.

[0014] As a further technical solution of this utility model, multiple sets of seepage grooves are provided in the base, and feet are welded to both sides of the bottom end of the base. A water-holding tray is inserted between the feet and the water-holding tray is located below the base.

[0015] Compared with the prior art, the beneficial effects of this utility model are: by setting up a water grinding mechanism, the grinding area of ​​the concrete block sample is precisely rinsed to simulate water grinding. The grinding disc is rinsed with water while grinding, keeping the grinding area cool and reducing dust splashing.

[0016] With an electric grinding mechanism and a lifting mechanism, the contact pressure of the grinding disc on the concrete block sample can be finely adjusted. The grinding disc is driven by an electric grinder to rotate automatically and grind the sample surface. The grinding speed and force can be flexibly adjusted by the controller, avoiding the errors caused by the need to hand-grind the grinder in traditional tests.

[0017] With the addition of mounting bolts, locking bolts, and hose clamps, the overall structure facilitates replacement and maintenance, and improves testing efficiency. Attached Figure Description

[0018] Figure 1 This is a front view structural diagram of the present utility model;

[0019] Figure 2 This is a three-dimensional structural diagram of the base of this utility model;

[0020] Figure 3 This is a schematic diagram of the rear view structure of the servo motor of this utility model;

[0021] Figure 4 For the present utility model Figure 1 A magnified view of the structure at point A in the middle.

[0022] In the diagram: 1. Bracket; 2. Controller; 3. Rack; 4. Gear; 5. Mounting seat; 6. Bushing; 7. Mounting seat; 8. Assembly bolt; 9. Fixing plate; 10. Electric grinder; 11. Grinding disc; 12. Cylinder; 13. Hose; 14. Water pump; 15. Water tank; 16. Base; 17. Water tray; 18. Foot; 19. Nozzle; 20. Drainage channel; 21. Servo motor; 22. Locking bolt; 23. Clip. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-4 This utility model provides an embodiment of a device for testing the wear resistance of concrete with double mineral powder admixture, including a base 16, a bracket 1 fixedly connected to the top edge of the base 16, a controller 2 fixedly fixed to the left side of the bracket 1, and a lifting mechanism installed on the left side of the bracket 1; the lifting mechanism includes a fixed seat 5 fixed to the middle of the bracket 1, a servo motor 21 fixedly fixed behind the fixed seat 5, a gear 4 fixedly connected to the output shaft of the servo motor 21, a bushing 6 sleeved on the outside of the bracket 1, a rack 3 welded to the right side of the bushing 6, the rack 3 meshing with the gear 4, a mounting seat 7 fixedly connected to the bottom end of the rack 3, a fixing plate 9 assembled on the right side of the mounting seat 7, and the gear 4 installed in front of the fixed seat 5; the rack 3 and the mounting seat 7 form an "L"-shaped lifting structure.

[0025] Specifically, such as Figure 1 and Figure 2As shown, the device uses an automatic grinding method. The servo motor 21, model MSMF042L1U, drives the gear 4 to rotate, which in turn drives the gear 4 to rise and fall with the meshing rack 3. This drives the mounting base 7 and the fixing plate 9 installed at the bottom of the rack 3 to rise and fall synchronously. The bushing 6 is sleeved on the outside of the bracket 1 to provide a stable guide and ensure that the lifting process is smooth and stable. The cylinder 12 in the electric grinder mechanism is model SMC CD85N16-20-B. By controlling the intake and exhaust of compressed gas, the piston rod can be adjusted by a small amount of lifting and lowering, which in turn finely adjusts the contact pressure of the grinding disc 11 on the concrete block sample.

[0026] A water grinding mechanism is provided on the right side of the fixed plate 9; the water grinding mechanism includes a water tank 15 placed on the right side of the base 16, a water pump 14 installed at the top of the water tank 15, a nozzle 19 installed at the bottom right side of the fixed plate 9, a hose 13 connected between the output end of the water pump 14 and the nozzle 19, a clip 23 fixed on the right side of the fixed plate 9, multiple sets of seepage grooves 20 are opened in the base 16, feet 18 are welded on both sides of the bottom end of the base 16, a water tray 17 is inserted between the feet 18, and the water tray 17 is located below the base 16.

[0027] Specifically, such as Figure 1 and Figure 2 As shown, the device performs grinding experiments on concrete block samples through an electric grinding mechanism and a lifting mechanism. For a more realistic simulation, a water grinding mechanism is also provided. Water is pumped out of the water tank 15 by a JEM-370 water pump 14 and delivered to the atomizing nozzle 19 through a silicone hose 13. The nozzle 19 adopts a stainless steel fine mist structure, which can accurately rinse the grinding area of ​​the concrete block sample to simulate water grinding. The clip 23 is a flexible buckle that can be opened and closed. After installation, it can effectively fix the direction of the hose 13 and prevent the hose 13 from swinging or loosening during grinding, while not affecting the smooth flow of water in the hose 13. The grinding disc 11 is rinsed with water while grinding to keep the grinding area cool and reduce dust splashing. Wastewater flows into the water collection tray 17 below through multiple sets of seepage channels 20 set in the base 16. It can be discharged centrally through the conduit to prevent liquid accumulation and keep the test area clean.

[0028] An electric grinding mechanism is installed at the fixed plate 9. The electric grinding mechanism includes a cylinder 12 fixed to the top of the fixed plate 9. An electric grinder 10 is fixedly installed at the bottom of the piston rod of the cylinder 12. A grinding disc 11 is fixedly assembled on the output shaft of the electric grinder 10. The grinding disc 11 is disc-shaped and located to the left of the nozzle 19.

[0029] Specifically, such as Figure 1 and Figure 2 As shown, the grinding disc 11 is driven by the electric grinder 10 to rotate automatically and grind the sample surface. The grinding speed and force can be flexibly adjusted by the controller 2, avoiding the errors caused by the need to hand-hold the grinder in traditional tests.

[0030] The mounting base 7 and the fixing plate 9 are fixedly connected by assembly bolts 8. The right side of the mounting base 7 has a cavity for the fixing plate 9 to be inserted. The clip 23 and the fixing plate 9 are fixedly connected by locking bolts 22.

[0031] Specifically, such as Figure 1 and Figure 2 As shown, the device uses assembly bolts 8 to firmly connect the mounting base 7 and the fixing plate 9. The structure is provided with a plug-in cavity for easy disassembly and maintenance. The right side of the fixing plate 9 is provided with a clip 23 for clamping and fixing the hose 13. The hose 13 can be quickly disassembled or the clip 23 can be replaced by locking bolts 22. The overall structure is easy to replace and maintain and improves testing efficiency.

[0032] Working principle: A lifting mechanism is installed on the left side of the support 1 at the top of the device. In the lifting mechanism, the fixed seat 5 is fixed in the middle of the support 1. A servo motor 21 is installed behind the fixed seat 5. The output shaft of the servo motor 21 is connected to the gear 4. The controller 2 sends a command to drive the servo motor 21 to rotate. The gear 4 rotates accordingly and meshes with the rack 3. The rack 3 is sleeved with a bushing 6 to support and guide the rack 3 to move up and down stably. The bottom end of the rack 3 is connected to the mounting seat 7. During the lifting and lowering process of the rack 3, the mounting seat 7 moves up and down synchronously. The bottom end of the piston rod of the cylinder 12 is fixedly connected to the electric grinder 10. The output shaft of the electric grinder 10 is equipped with a disc-shaped grinding disc 11, which is used to contact the concrete sample for surface grinding. The controller 2 controls the servo motor 21, the electric grinder 10 and the cylinder 12 to work simultaneously according to the set parameters. The grinding disc 11 rotates and grinds continuously on the sample surface. By controlling the grinding time and speed, standardized testing of samples with different concrete mix proportions can be achieved.

[0033] Step 1: The operator fills the water tank 15 with clean water and starts the water pump 14. The water pump 14 is fixed at the top of the water tank 15 and is used to draw water out of the water tank 15 and deliver it to the nozzle 19 on the lower right of the fixed plate 9 through the hose 13. The nozzle 19 sprays water at the concrete sample grinding area to cool and clean the contact area between the grinding disc 11 and the sample. The hose 13 is clamped and fixed on the side of the fixed plate 9 by the clip 23, which can realize the quick installation and removal of the hose 13 and keep the water supply unobstructed.

[0034] Step 2: Servo motor 21 controls rack 3 to lift and lower, thereby driving fixed plate 9 and grinding disc 11 to align with concrete sample surface. Cylinder 12 controls grinding pressure of grinding disc 11. Electric grinder 10 drives grinding disc 11 to rotate to achieve continuous grinding. If water grinding function is turned on, nozzle 19 sprays water synchronously. Wastewater generated during grinding flows into water collection tray 17 along seepage trough 20 and is finally discharged through the conduit of water collection tray 17.

[0035] Step 3: After grinding, the concrete block sample is taken out and placed in a constant temperature drying oven for low-temperature drying treatment, usually at 50℃~60℃ until constant weight, to remove residual moisture from the water grinding process and avoid affecting the weighing accuracy. The dried sample is weighed using an electronic balance to compare the mass change before and after grinding, so as to accurately calculate the wear mass of the sample, which serves as the key data basis for evaluating its wear resistance performance.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A device for testing the wear resistance of concrete with dual mineral powder admixture, comprising a base (16), characterized in that: The top edge of the base (16) is fixedly connected to a bracket (1), and a controller (2) is fixed to the left side of the bracket (1). A lifting mechanism is installed on the left side of the bracket (1). The lifting mechanism includes a fixed seat (5) fixed in the middle of the bracket (1). A servo motor (21) is fixed behind the fixed seat (5). A gear (4) is fixedly connected to the output shaft of the servo motor (21). A bushing (6) is sleeved on the outside of the bracket (1). A rack (3) is welded to the right side of the bushing (6). The rack (3) meshes with the gear (4). A mounting seat (7) is fixedly connected to the bottom end of the rack (3). A fixing plate (9) is assembled on the right side of the mounting seat (7). A water grinding mechanism is provided on the right side of the fixed plate (9). The water grinding mechanism includes a water tank (15) placed on the right side of the base (16). A water pump (14) is installed on the top of the water tank (15). A nozzle (19) is installed at the bottom right side of the fixed plate (9). A hose (13) is connected between the output end of the water pump (14) and the nozzle (19).

2. The device for testing the wear resistance of double-blended mineral powder concrete according to claim 1, characterized in that: An electric grinding mechanism is installed at the fixed plate (9). The electric grinding mechanism includes a cylinder (12) fixed to the top of the fixed plate (9). An electric grinder (10) is fixedly installed at the bottom of the piston rod of the cylinder (12). A grinding disc (11) is fixedly mounted on the output shaft of the electric grinder (10). The grinding disc (11) is disc-shaped and located to the left of the nozzle (19).

3. The device for testing the wear resistance of double-blended mineral powder concrete according to claim 1, characterized in that: A clip (23) is fixed to the right side of the fixing plate (9), and a locking bolt (22) is fixedly connected between the clip (23) and the fixing plate (9).

4. The device for testing the wear resistance of double-blended mineral powder concrete according to claim 1, characterized in that: The mounting base (7) and the fixing plate (9) are fixedly connected by assembly bolts (8), and the mounting base (7) has a cavity on the right side for the fixing plate (9) to be inserted.

5. The device for testing the wear resistance of double-blended mineral powder concrete according to claim 1, characterized in that: The gear (4) is installed in front of the fixed seat (5), and the rack (3) and the mounting seat (7) form an "L"-shaped lifting structure.

6. The device for testing the wear resistance of double-blended mineral powder concrete according to claim 1, characterized in that: Multiple sets of seepage grooves (20) are provided inside the base (16). Foot (18) is welded to both sides of the bottom end of the base (16). A water-holding tray (17) is inserted between the foot (18) and the water-holding tray (17) is located below the base (16).

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