Study device for scouring, grinding and freeze thawing of hydraulic concrete

Abstract

The utility model relates to the technical field of material performance test detection devices, in particular to a hydraulic concrete impact-grinding and freeze-thawing research device. Comprising a gearbox, a lifting mechanism, a motor, a quick freezing and thawing box, a sand pump, a grinding wheel, a drill bit and the like. The grinding wheel and the drill bit serve as a device body and are driven by a motor. The small sand pump is driven by an independent motor and is used for collecting a sand-water mixture generated in an experiment, so that the problem that conventional concrete anti-scouring test equipment cannot treat the sand-water mixture is solved, the experiment process is simpler and more convenient, and the equipment loss is reduced to the greatest extent; the drill bit is used for sampling the scouring test block, so that the subsequent test on the strength performance of the sample is facilitated; the quick freezing and thawing equipment is used for realizing efficient combination of hydraulic concrete scouring and freezing and thawing experiments by a user, and the experiment efficiency and the user convenience are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to material performance test detection device technical field, concretely relates to a hydraulic concrete impact and grind freeze -thaw research device. BACKGROUND

[0002] With the sustained development of water conservancy and hydropower system in China, water resources allocation is gradually optimized, and the infrastructure such as embankment, reservoir and river channel is more perfect, at the same time, the problem of impact and wear of sand-containing water flow on concrete material in the foundation structure follows, which causes a certain degree of physical damage to the hydraulic structure, and further affects the durability of the structure; for underwater engineering, the durability and strength of hydraulic concrete are affected by freeze-thaw action at the same time; for the impact and wear of base material and the anti-freeze performance, even the research field of the coupling effect of both, it is urgent to solve, but there are still a lot of blanks in the industry related equipment. SUMMARY

[0003] The utility model discloses to solve the research of the two kinds of factors coupling effect under the influence of causing material durability decline of the relevant equipment at present stage, still belong to the blank, namely lack the technical problem of the device for the coupling effect of the impact and wear of base material and the anti-freeze performance, provide a kind of hydraulic concrete impact and grind freeze -thaw research device. It can complete the wear performance test of hydraulic concrete, anti-freeze performance test, and also can complete the performance test of concrete raw material under the coupling factors of both. The utility model solves the series problems that the existing equipment cannot study relevant coupling factors, and improves user's use efficiency, and creates experimental conditions for the influence of coupling factor.

[0004] To solve the above technical problems, the technical scheme adopted by the utility model is:

[0005] The utility model relates to a kind of hydraulic concrete scouring freeze-thaw research devices, including machine case and quick freeze-thaw box, the top of quick freeze-thaw box is fixed with large support arm, the top of large support arm is installed with gear box, lifting mechanism is equipped in gear box, the lifting mechanism includes main shaft for lifting, the outside of main shaft is equipped with telescopic sleeve, lifting mechanism is connected with motor for driving main shaft to move up and down, the motor is installed in machine case;The top of machine case and quick freeze-thaw box is jointly installed with small support arm, the small support arm is equipped with limit sliding frame, the limit sliding frame, the bottom plate of limit sliding frame upper portion is detachably connected with motor, and motor is detachably connected below telescopic sleeve, the bottom plate bottom of limit sliding frame is detachably connected with conversion disc, the conversion disc is respectively connected with grinding wheel and diamond drill bit, the top of machine case located at the place directly below grinding wheel and diamond drill bit is fixedly connected with material disc, located in machine case and located at the bottom of material is communicated with sand pumping head, the sand pumping head is connected with sand pumping pump, sand pumping pump is connected with small motor, the lower end of sand pumping head is connected with sand dredging pipe, the bottom end of sand dredging pipe is sand outlet, the bottom of machine case corresponding with sand outlet is equipped with waste disc, the quick freeze-thaw box is connected with control motor, and the control motor is installed in machine case.

[0006] As the further limitation of the above technical solution, the disc is provided with a slide rail for switching between the grinding wheel and the diamond drill bit.

[0007] As the further limitation of the above technical solution, the machine case is provided with an operation panel a.

[0008] As the further limitation of the above technical solution, the quick freeze-thaw box is provided with an operation panel b for controlling and feeding the temperature data in the box.

[0009] As the further limitation of the above technical solution, the quick freeze-thaw box is provided with a handle.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] 1、The utility model combines concrete scouring, wearing experiment device, drill core sampling experiment device and quick freeze-thaw experiment device, aims at studying material performance change of hydraulic concrete under the coupling effect of scouring and wearing and freeze-thaw, and fills the gap of existing experiment device and research technology.

[0012] 2、The utility model realizes the relative operation of scouring and drill core sampling through the movement of conversion disc slide rail, adjusts position through the lifting of telescopic sleeve, replaces the traditional handle control mode, improves experiment efficiency and feasibility.

[0013] 3、The utility model sets sand pumping pump at reasonable position, for discharging sand-water mixture containing sample components generated in scouring experiment. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the structure schematic view of the hydraulic concrete of the utility model.

[0015] Figure 2 It is the connection schematic view of the conversion disc and the grinding wheel and the diamond drill bit.

[0016] Figure 3 It is the local enlarged schematic view of the conversion disc.

[0017] The signs in the drawing are as follows:

[0018] 1-gear box, 2-main shaft, 3-telescopic sleeve, 4-small support arm, 5-motor, 6-grinding wheel, 7-material disc, 8-sand extraction head, 9-operation panel a, 10-machine box, 11-waste disc, 12-sand outlet, 13-small motor, 14-quick freeze-thaw box, 15-handle, 16-operation panel b, 17-diamond drill bit, 18-conversion disc, 19-large support arm. DETAILED DESCRIPTION

[0019] The utility model is further described below in combination with specific embodiments. Embodiment 1

[0020] As Figure 1The water concrete scouring and freezing research device comprises a machine box 10 and a rapid freezing and thawing box 14, the top of the rapid freezing and thawing box 14 is fixed with a large supporting arm 19, the top end of the large supporting arm 19 is provided with a gear box 1, the gear box 1 is provided with a lifting mechanism, the lifting mechanism comprises a main shaft 2 for lifting, the outer side of the main shaft 2 is provided with an elastic sleeve 3, the lifting mechanism is connected with a motor for driving the main shaft 2 to move up and down (the lifting mechanism is a common structure capable of lifting the main shaft 2, such as a gear transmission structure meshing with a threaded column, the main shaft 2 is a corresponding threaded column, the gear transmission structure is connected with the motor, the motor controls the gear to rotate forward and backward, so that the threaded column meshing with the gear moves up and down, that is, the main shaft 2 moves up and down, the upper end of the elastic sleeve 3 is fixed with the gear box 1, the lower end realizes expansion and contraction with the up and down movement of the main shaft 2, the lower end of the elastic sleeve 3 is connected with a limiting ring plate, the main shaft 2 is provided with a corresponding limiting ring groove, the limiting ring plate is clamped in the limiting ring groove to realize sleeve connection), and the motor is installed in the machine box 10; the top of the machine box 10 and the rapid freezing and thawing box 14 is jointly provided with a small supporting arm 4, the small supporting arm 4 is provided with a limiting sliding frame, the limiting sliding frame is connected with a motor 5 which is detachably connected below the elastic sleeve 3, the bottom of the bottom plate of the limiting sliding frame is detachably connected with a conversion disc 18, the conversion disc 18 is connected with a grinding wheel 6 and a diamond drill bit 17, the grinding wheel 6 and the diamond drill bit 17 are driven by the motor 5 and are located below the grinding wheel 6 and the diamond drill bit 17, the top of the machine box 10 below the grinding wheel 6 and the diamond drill bit 17 is fixedly connected with a material disc 7, the inside of the machine box 10 and the bottom of the material disc 7 are connected with a sand suction head 8, the sand suction head 8 is connected with a sand suction pump, the sand suction pump is connected with a small motor 13, the lower end of the sand suction head 8 is connected with a sand removal pipe, the bottom end of the sand removal pipe is an outlet 12, the bottom of the machine box 10 corresponding to the outlet 12 is provided with a waste disc 11, the rapid freezing and thawing box 14 is connected with a control motor, the control motor is installed in the machine box 10, and the rapid freezing and thawing box 14 can complete rapid freezing and thawing after scouring and grinding. The small sand suction pump is driven by a separate small motor 13 and is used for collecting sand and water mixture generated in the experiment, solves the problem that a conventional concrete scouring test device cannot process sand and water mixture, and needs to be noted that the power source of the small motor 13 and a transmission device and other functional elements is also provided by the motor in the machine box 10. The experimental process is more convenient, and the equipment loss is reduced to the maximum extent; the diamond drill bit 17 is configured to be used for sampling of the scouring test block, and subsequent test strength performance and the like of the test sample are facilitated; the rapid freezing and thawing equipment realizes efficient combination of users between water concrete scouring and freezing experiments, improves experimental efficiency and user convenience.

[0021] As a further limitation of the above technical solution, as Figure 2 and 3As shown, the conversion disc 18 is provided with a slide rail for switching between the grinding wheel 6 and the diamond drill bit 17. The grinding wheel 6 is positioned on the slide rail of the conversion disc 18 and is driven by the motor 5 to perform the impact and abrasion experiment; the diamond drill bit 17 is installed in the appropriate position through the slide rail and the limiting hole to complete the core sampling work.

[0022] The impact and abrasion experiment is completed by the grinding wheel 6, and the core sampling work is completed by the diamond drill bit 17, so that the user operation is facilitated and the experimental process is simplified.

[0023] As a further limitation of the above technical solution, the operation panel a9 is arranged on the outside of the machine box 10, and the operation panel a9 is provided with a lifting button which is controlled to realize the lifting of the conversion disc 18 in combination with the action of the gear set, and then the impact and abrasion of the grinding wheel and the sampling of the drill bit are completed. The rotation speed of the grinding wheel 6 and the lifting of the drill bit are adjusted through the operation panel a9.

[0024] As a further limitation of the above technical solution, the operation panel b16 for controlling and feeding the temperature data in the box is arranged on the quick freeze-thaw box 14. The quick freeze-thaw box 14 is connected to the outside of the machine box 10, and the power source is provided by the motor in the machine box 10; the temperature and time data are provided by the operation panel b16.

[0025] As a further limitation of the above technical solution, the quick freeze-thaw box 14 is provided with a handle 15.

[0026] As a further limitation of the above technical solution, the height of the material disc 7 is adapted to the length of the diamond drill bit 17, and the normal work of the grinding wheel 6 is ensured; the rotation speed of the grinding wheel 6 is adjusted through the operation panel a to adapt to different experimental conditions.

[0027] As a further limitation of the above technical solution, the sand outlet 12 is vertically arranged to avoid blockage and achieve the best sand extraction effect. The small motor 13 provides power independently to ensure the stable operation of the equipment, and the impact and abrasion of the sample under different schemes can be performed at the same time.

[0028] The device can realize the research on the influence of the coupling effect of the impact and abrasion and the freeze-thaw of the hydraulic concrete, and the working process and principle are as follows:

[0029] The hydraulic concrete erosion experiment is used to study the performance of the concrete in resisting erosion in the erosion environment, and the main operation process of the concrete erosion experiment is as follows: the sample in the face dry state after curing is fixed in the material disc 7 by the gasket, the sand water mixture is added into the rear material disc 7, and the sand wheel 6 drives the sand water to erode and wear the surface of the sample at a set speed; the sample after erosion is weighed and still placed in the material disc 7, the drill bit is in the appropriate position by using the conversion disc 18 slide rail, and the sampling work of the erosion sample is carried out; the quick freeze-thaw tank 14 outside the machine box 10 is used to carry out the quick freeze-thaw test on the sampled test block, and thus the erosion and freeze-thaw test for the hydraulic concrete is completed.

[0030] The anti-erosion strength and the wear rate are calculated in the following manner:

[0031] fa=TA / M

[0032] L=M / TA

[0033] fa—anti-erosion strength, h / (g / cm 2 );

[0034] L—wear rate, g / (h.cm 2 );

[0035] T—test cumulative time, h;

[0036] A—sample erosion area, cm 2 .

[0037] M—cumulative mass loss of the test piece after erosion for T period, kg.

[0038] Note: the average value of the measured values of three samples in a group is taken as the test result. If the difference between a single measured value and the average value is more than 15%, the value should be excluded.

[0039] The concrete freeze-thaw experiment is used to study the anti-freeze-thaw performance of the concrete, the quick freezing method with higher efficiency and smaller error is adopted, the mass change of the test sample before and after freezing and thawing is finally detected, and the record is recorded.

[0040] Freeze-thaw experiment steps and principles:

[0041] After curing, the sample is placed in a temperature chamber, and each freeze-thaw cycle should be completed within 2-4 hours. The center temperature of the test piece should be controlled at -17º±2º during freezing and 20º±2º during melting. The principle is that freeze-thaw action will destroy the pore structure inside the concrete, causing changes in the porosity and mechanical properties inside the concrete, ultimately leading to changes in durability. Therefore, we can judge the freeze-thaw effect by the mass change of the sample during the freeze-thaw process. The change in the chemical environment inside the concrete also causes the expansion of the substance, which also leads to a change in mass. In summary, by recording the mass change of the sample during the freeze-thaw experiment, we can trace the effect and make it feasible. According to the concrete freeze-thaw experiment specification, when the relative dynamic elastic modulus of the sample decreases to 60% or the mass loss exceeds 5%, the freeze-thaw cycle experiment is completed.

Claims

1. A hydraulic concrete freeze-thaw abrasion research device, characterized in that, Including the case (10) and the quick freeze thaw tank (14), the top of the quick freeze thaw tank (14) is fixed with a large branch arm (19), the top end of the large branch arm (19) is installed with a gear box (1), the gear box (1) is provided with a lifting mechanism, the lifting mechanism includes a main shaft (2) for lifting, the outer side of the main shaft (2) is provided with a telescopic sleeve (3), the lifting mechanism is connected with a motor for driving the main shaft (2) to move up and down, the motor is installed in the case (10); The top of the case (10) and the quick freeze thaw tank (14) is jointly installed with a small branch arm (4), the small branch arm (4) is provided with a limiting sliding frame, the limiting sliding frame, the bottom plate of the limiting sliding frame is detachably connected with a motor (5), and the motor (5) is detachably connected below the telescopic sleeve (3), the bottom plate of the limiting sliding frame is detachably connected with a conversion disc (18), the conversion disc (18) is respectively connected with a grinding wheel (6) and a diamond drill bit (17), the top of the case (10) located directly below the grinding wheel (6) and the diamond drill bit (17) is fixedly connected with a material disc (7), the inside of the case (10) and the bottom of the material disc (7) are communicated with a sand suction head (8), the sand suction head (8) is connected with a sand suction pump, the sand suction pump is connected with a small motor (13), the lower end of the sand suction head (8) is connected with a sand dredging pipe, the bottom end of the sand dredging pipe is a sand outlet (12), the bottom of the case (10) corresponding to the sand outlet (12) is provided with a waste disc (11), the quick freeze thaw tank (14) is connected with a control motor, and the control motor is installed in the case (10).

2. A hydraulic concrete freeze-thaw research device according to claim 1, wherein, The disc (18) is provided with a slide rail for switching between the grinding wheel (6) and the diamond drill bit (17).

3. The hydraulic concrete freeze-thaw research device of claim 1, wherein, The outside of the case (10) is provided with an operation panel a (9).

4. The hydraulic concrete freeze-thaw research device of claim 1, wherein, The quick freeze thaw tank (14) is provided with an operation panel b (16) for controlling and feeding the temperature data in the tank.

5. The hydraulic concrete freeze-thaw research device of claim 1, wherein, The quick freeze thaw tank (14) is provided with a handle (15).

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