Hardness detection device for cement product

Abstract

The utility model discloses a hardness detection device for cement products. The hardness detection device comprises a rack, a vertical loading mechanism is arranged at the top of the rack, a pressure head is movably arranged at the lower end of the vertical loading mechanism, a pressure sensor is arranged between the upper end of the pressure head and the vertical loading mechanism, a workbench is arranged on the rack, and a positioning clamp is arranged on the workbench; laser range finders are fixedly arranged on the left and right sides of the lower end of the vertical loading mechanism; displacement of the pressing head is measured through the laser range finder, when the pressing head just makes contact with a cement board, the laser range finder records the distance between the pressing head and the surface of the cement board, when loading is completed, the pressing head sinks into the cement board, the laser range finder measures the distance between the pressing head and the cement board again, and then the cement board is loaded. The difference between the two data is the displacement of the pressure head, data is transmitted to an external computer in combination with the pressure sensor, manual measurement is not needed, personal errors are avoided, the hardness of the cement board is rapidly and accurately calculated, and the detection efficiency and the data accuracy are greatly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of cement product testing devices, specifically to a hardness testing device for cement products. Background Technology

[0002] In the construction industry, the quality of cement products is paramount, and the hardness of cement products is one of the key indicators for measuring their quality. Cement boards, in particular, are a commonly used building material, and the accurate testing of their hardness directly affects the stability and safety of building structures. Currently, the industry generally uses the method of creating cement testing blocks or slabs of specific sizes, and then applying pressure to these standard specimens to measure the hardness of cement products.

[0003] However, existing cement product hardness testing equipment has many shortcomings. When measuring the depth or displacement of the indenter, traditional equipment usually requires manual measurement after loading. This manual measurement method is not only inefficient and consumes a lot of manpower and time, but is also easily affected by human factors. In addition, traditional equipment lacks necessary protective facilities, and splashed cement residue can cause injury to the operator. Utility Model Content

[0004] (I) Technical Issues

[0005] This invention provides a hardness testing device for cement products, which solves the problems of low efficiency, large error, and lack of necessary protective facilities caused by manual measurement of indenter displacement in traditional testing equipment.

[0006] (II) Technical Content

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: a hardness testing device for cement products, including a frame, a vertical loading mechanism at the top of the frame, a pressure head movably mounted at the lower end of the vertical loading mechanism, a pressure sensor between the upper end of the pressure head and the vertical loading mechanism, a worktable movably mounted on the frame and directly below the pressure head, a positioning clamp for fixing cement products on the worktable, and a height adjustment mechanism for driving the worktable to rise and fall at the bottom of the frame; laser rangefinders are fixedly mounted on the left and right sides of the lower end of the vertical loading mechanism to measure the displacement data of the pressure head, and both the laser rangefinders and the pressure sensor are connected to an external computer; protective plates are fixedly mounted on the left and right sides of the upper surface of the frame, and a sliding door is mounted on the front end of the protective plate, the door being made of transparent tempered glass and closed by magnetic attraction.

[0008] Furthermore, leveling feet are fixedly installed at the four corners of the bottom of the frame, and bubble levels are fixedly installed on the front and right sides of the frame.

[0009] Further, the height adjusting mechanism comprises an internally threaded pipe arranged on the bottom of the frame, the internally threaded pipe is fixed with a knob at one end extending to the bottom of the frame, further comprises a screw rod fixed on the bottom center of the workbench, the screw rod is matched with the internally threaded pipe, and the bottom of the workbench and the bottom of the frame are connected with the guide mechanism.

[0010] Further, the guide mechanism comprises a guide pipe fixed on the bottom of the frame, and a guide rod fixed on the bottom of the workbench, the guide rod is connected with the guide pipe.

[0011] Further, the vertical loading mechanism comprises an electric push rod fixed on the upper end of the frame, the piston end of the electric push rod is fixed with a mounting block, the lower end of the mounting block is provided with a T-shaped cavity used for inserting a pressure head, a pressure sensor is fixed on the top surface of the T-shaped cavity, and a laser range finder is fixed on the side surface of the mounting block.

[0012] Further, the positioning clamp comprises vertical plates fixed on the upper end face of the workbench and arranged on the left and right sides, the vertical plates are threadedly connected with fastening bolts, the fastening bolts are rotatably provided with clamping plates at the other ends, the clamping plates are fixed with guide rods on the outer side surfaces, the guide rods pass through the vertical plates and are slidably connected with the vertical plates, and the inner side surfaces of the clamping plates are fixed with anti-skid rubber pads.

[0013] Further, the front end of the protective plate is fixed with a sliding block, the inner side surface of the switch door is fixed on a T-shaped sliding rail matched with the sliding block in sliding mode, and two groups of magnets are fixed on the opposite side edges of the two switch doors.

[0014] (Three) technical effects

[0015] Compared with the prior art, the utility model has the advantages of:

[0016] 1. The laser range finder is used to measure the displacement of the pressure head, when the pressure head just contacts the cement board, the laser range finder records the distance to the surface of the cement board, when the loading is completed, the pressure head sinks into the cement board, the laser range finder measures the distance to the cement board again, the difference between the two data is the displacement of the pressure head, the data of the pressure sensor is transmitted to the external computer, manual measurement is not needed, human error is avoided, the hardness of the cement board can be quickly and accurately calculated, and the detection efficiency and data accuracy are greatly improved.

[0017] 2. The height adjusting mechanism can easily adjust the height of the workbench by rotating the knob on the internally threaded pipe, and the guide mechanism ensures that the workbench stably rises and falls, the operation is simple and convenient, and the detection requirements of cement products with different thicknesses can be met.

[0018] 3. The protective plate cooperates with the switch door made of transparent tempered glass, which can effectively prevent the cement fragments from splashing and hurting people during the detection process, and can enable the operator to directly observe the detection situation, and the switch door is closed by magnet attraction, and the operation is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the three-dimensional structure diagram of the hardness detection device for cement products Figure 1 .

[0020] Figure 2 is the three-dimensional structure diagram of the hardness detection device for cement products Figure 2 .

[0021] Figure 3 is the main view structure diagram of the hardness detection device for cement products.

[0022] Figure 4 is the left view structure diagram of the hardness detection device for cement products.

[0023] Figure 5 is the top view structure diagram of the hardness detection device for cement products.

[0024] Figure 6 is the cross-sectional structure diagram of the hardness detection device for cement products.

[0025] As shown in the figure: 1, rack; 2, vertical loading mechanism; 3, pressure head; 4, pressure sensor; 5, workbench; 6, positioning fixture; 7, laser range finder; 8, guard plate; 9, switch door; 10, magnet; 11, leveling foot cup; 12, bubble level; 13, internal thread pipe; 14, knob; 15, screw rod; 16, guide pipe; 17, guide rod; 18, electric push rod; 19, mounting block; 20, T-shaped cavity; 21, vertical plate; 22, fastening bolt; 23, clamping plate; 24, guide rod; 25, antiskid rubber pad; 26, sliding block; 27, T-shaped slide rail. DETAILED DESCRIPTION

[0026] In the description of the present application, it is understood that the terms "upper", "lower", "front", "back", "left", "right", "inner", "outer", "center" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation or operation, therefore it cannot be understood as a limitation of the present application.

[0027] In the description of the utility model, still need to explain, unless another explicit provision and limitation, term '' have '', '' install '', '' link '', '' connection '' such as should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integral type connection, can be mechanical connection, also can be electrical connection, can be direct connection, also can through intermediate medium indirectly connect, can be two element inside intercommunication. For ordinary skilled person in the art, can understand the specific meaning of above-mentioned term in the utility model according to specific circumstances.

[0028] The utility model makes further detailed description in combination with drawings.

[0029] In combination with the drawings Figure 1 to the drawings Figure 6 , the hardness detection device for cement product, including frame 1, the top of frame 1 is equipped with vertical loading mechanism 2, the lower end of vertical loading mechanism 2 is movably equipped with pressure head 3, and the upper end between pressure head 3 and vertical loading mechanism 2 is equipped with pressure sensor 4, and the frame 1 is movably equipped with workbench 5 on and located just below pressure head 3, and workbench 5 is equipped with positioning fixture 6 for fixing cement product, and the bottom of frame 1 is equipped with height adjusting mechanism for driving workbench 5 to lift, laser range finder 7 is fixedly arranged on the left side and the right side of the lower end of vertical loading mechanism 2, and is used to measure the displacement data of pressure head 3, when pressure head 3 just contacts cement board, laser range finder 7 records the distance from the surface of cement board, when loading is completed, pressure head 3 sinks to the inside of cement board, and laser range finder 7 measures the distance from cement board again, and the difference between the two data is the displacement of pressure head, the hardness of cement board can be calculated according to the displacement and the pressure value of pressure sensor, laser range finder 7 and pressure sensor 4 are connected with external computer, the left side and the right side of the upper end of frame 1 are fixedly equipped with guard plate 8, the front end of guard plate 8 is slidably equipped with switch door 9, switch door 9 adopts transparent toughened glass material and is closed by magnet 10, leveling foot cup 11 is fixedly arranged at the four corners of the bottom of frame 1, and bubble level 12 is fixedly arranged at the front side and the right side of frame 1.

[0030] In the embodiment, as a preferred technical solution, the height adjusting mechanism includes an internally threaded tube 13 rotatably arranged at the bottom of the frame 1, one end of the internally threaded tube 13 extending to the bottom of the frame 1 is fixedly provided with a knob 14, and further includes a screw rod 15 fixedly arranged at the center of the bottom of the workbench 5, the screw rod 15 is adapted to the internally threaded tube 13, and a guide mechanism is connected between the bottom of the workbench 5 and the bottom of the frame 1. The guide mechanism includes a guide tube 16 fixedly arranged at the bottom of the frame 1, and further includes a guide rod 17 fixedly arranged at the bottom of the workbench 5, and the guide rod 17 is connected with the guide tube 16 in a plug-in manner.

[0031] In the embodiment, as a preferred technical scheme, the vertical loading mechanism 2 comprises an electric push rod 18 fixedly arranged at the upper end of the rack 1, a mounting block 19 fixedly arranged at the piston end of the electric push rod 18, a T-shaped cavity 20 for inserting the pressure head 3 arranged at the lower end of the mounting block 19, and a pressure sensor 4 fixedly arranged at the top surface inside the T-shaped cavity 20.

[0032] In the embodiment, as a preferred technical scheme, the positioning clamp 6 comprises vertical plates 21 fixedly arranged at the left and right sides of the upper end surface of the workbench 5, fastening bolts 22 threadedly connected to the vertical plates 21, clamping plates 23 rotatably arranged at the other ends of the fastening bolts 22, guide rods 24 fixedly arranged at the outer sides of the clamping plates 23, and anti-skid rubber pads 25 fixedly arranged at the inner sides of the clamping plates 23.

[0033] In the embodiment, as a preferred technical scheme, the front end of the protective plate 8 is fixedly arranged with a sliding block 26, the inner side of the switch door 9 is fixedly arranged with a T-shaped sliding rail 27 matched with the sliding block 26, and the two groups of magnets 10 are fixedly arranged on the opposite sides of the two switch doors 9.

[0034] The working principle of the hardness detection device for cement products is as follows: the device drives the pressure head 3 to apply pressure to the cement product through the vertical loading mechanism 2, the pressure sensor 4 monitors the pressure value in real time, the laser range finder 7 measures the displacement data of the pressure head 3, and the hardness of the cement product is calculated by an external computer according to the pressure value and the displacement data. The height adjusting mechanism is used for adjusting the height of the workbench 5, so that the cement product is in a suitable detection position, the positioning clamp 6 fixes the cement product to prevent it from moving during the detection process, the protective plate 8 and the switch door 9 ensure the safety of the operator, and the leveling foot cup 11 and the bubble level 12 ensure that the device is in a horizontal and stable state.

[0035] The working process of the hardness detection device for cement products is as follows:

[0036] 1. Equipment leveling: observe the bubble level 12 fixedly arranged at the front side and the right side of the rack 1, and rotate the leveling foot cup 11 fixedly arranged at the four corners of the bottom of the rack 1 until the bubble level 12 shows that the device is in a horizontal state, so as to ensure the stability and accuracy of the detection process.

[0037] 2. Placing and fixing the cement product: open the switch door 9 slidingly arranged at the front end of the protective plate 8, place the cement product to be detected on the workbench 5, rotate the fastening bolt 22, move the clamping plate 23 rotatably connected to the other end of the fastening bolt 22 inward, make the guide rod 24 fixedly arranged at the outer side of the clamping plate 23 slide in the vertical plate 21, ensure the stable movement of the clamping plate 23, and make the anti-skid rubber pad 25 fixedly arranged at the inner side of the clamping plate 23 contact and clamp the cement product, so as to prevent the cement product from moving during the detection.

[0038] 3. Adjust the height of the workbench: turn the knob 14, the inner threaded tube 13 rotates to drive the screw 15 and the workbench 5 to lift, the guide rod 17 fixed at the bottom of the workbench 5 is inserted into the guide tube 16 fixed at the bottom of the frame 1, which ensures the stable lifting of the workbench 5, so that the cement product is at the appropriate detection height and close to the pressure head 3.

[0039] 4. Detection preparation: close the switch door 9 by the magnetic attraction. Turn on the electric push rod 18 in the vertical loading mechanism 2, and the piston end of the electric push rod 18 pushes the fixed mounting block 19 to move downward until the pressure head contacts the cement board. Start the laser range finder 7 and record the distance from the surface of the cement board at this time.

[0040] 5. Hardness detection: the electric push rod 18 continues to push the mounting block 19, so that the pressure head 3 gradually applies pressure to the cement board. The pressure sensor 4 monitors the pressure value in real time and transmits the data to the external computer. At the same time, the laser range finder 7 continuously monitors the displacement of the pressure head 3, and when the loading is completed, the pressure head 3 sinks into the interior of the cement board, and the laser range finder 7 measures the distance from the cement board again, and transmits the two distance data to the external computer to calculate the displacement of the pressure head 3.

[0041] 6. Result calculation: the external computer calculates the hardness data of the cement board according to the pressure value transmitted by the pressure sensor 4 and the displacement data of the pressure head 3 transmitted by the laser range finder 7 according to the corresponding calculation method.

[0042] 7. Take out the test piece: open the switch door 9, loosen the fastening bolt 22 of the positioning clamp 6, take out the detected cement product, complete the detection process, and prepare for the next detection.

[0043] The above describes the present application and its embodiments, which are not limited, and the drawings only show one of the embodiments of the present application, and the actual structure is not limited thereto. In summary, if a person skilled in the art is inspired by it, without departing from the creative purpose of the present application, without creative design, similar structure and embodiments of the technical scheme can be designed, which should belong to the protection scope of the present application.

Claims

1. A hardness detection device for cement products, comprising a rack (1), a vertical loading mechanism (2) is arranged at the top of the rack (1), a pressure head (3) is movably arranged at the lower end of the vertical loading mechanism (2), and a pressure sensor (4) is arranged between the upper end of the pressure head (3) and the vertical loading mechanism (2), characterized in that: a workbench (5) is movably arranged on the rack (1) and directly below the pressure head (3), the workbench (5) is provided with a positioning clamp (6) for fixing the cement products, and the bottom of the rack (1) is provided with a height adjusting mechanism for driving the workbench (5) to rise and fall; laser range finders (7) are fixedly arranged at the left and right sides of the lower end of the vertical loading mechanism (2), which are used to measure the displacement data of the pressure head (3), and the laser range finders (7) and the pressure sensor (4) are connected with an external computer; protective plates (8) are fixedly arranged at the left and right sides of the upper end surface of the rack (1), a switch door (9) is slidably arranged at the front end of the protective plate (8), the switch door (9) is made of transparent tempered glass and is closed by a magnet (10).

2. The hardness testing device for cementitious articles of claim 1, wherein: leveling foot cups (11) are fixedly arranged at the four corners of the bottom of the rack (1), and bubble levels (12) are fixedly arranged on the front side and the right side of the rack (1).

3. The hardness testing apparatus for cementitious articles of claim 1, wherein: The height adjusting mechanism comprises an inner threaded pipe (13) rotatably arranged at the bottom of the rack (1), a knob (14) fixedly arranged at one end of the inner threaded pipe (13) extending to the bottom of the rack (1), a screw rod (15) fixedly arranged at the center of the bottom of the workbench (5), the screw rod (15) is matched with the inner threaded pipe (13), and a guide mechanism is connected between the bottom of the workbench (5) and the bottom of the rack (1).

4. The hardness testing apparatus for cementitious articles of claim 3, wherein: The guide mechanism comprises a guide pipe (16) fixedly arranged at the bottom of the rack (1), and a guide rod (17) fixedly arranged at the bottom of the workbench (5), the guide rod (17) is connected with the guide pipe (16) in a plug-in manner.

5. The hardness testing apparatus for cementitious articles of claim 1, wherein: The vertical loading mechanism (2) comprises an electric push rod (18) fixedly arranged at the upper end of the rack (1), a mounting block (19) fixedly arranged at the piston end of the electric push rod (18), a T-shaped cavity (20) for inserting the pressure head (3) arranged at the lower end of the mounting block (19), a pressure sensor (4) fixedly arranged at the top surface inside the T-shaped cavity (20), and a laser range finder (7) fixedly arranged at the side surface of the mounting block (19).

6. The hardness testing apparatus for cementitious articles of claim 1, wherein: The positioning clamp (6) comprises vertical plates (21) fixedly arranged at the left and right sides of the upper end surface of the workbench (5), fastening bolts (22) threadedly connected to the vertical plates (21), clamping plates (23) rotatably arranged at the other ends of the fastening bolts (22), guide rods (24) fixedly arranged at the outer side surfaces of the clamping plates (23), the guide rods (24) penetrating through the vertical plates (21) and being slidably connected with the vertical plates (21), and anti-skid rubber pads (25) fixedly arranged at the inner side surfaces of the clamping plates (23).

7. The hardness testing apparatus for cementitious articles of claim 1, wherein: A sliding block (26) is fixedly arranged at the front end of the protective plate (8), a T-shaped slide rail (27) matching with the sliding block (26) is fixedly arranged at the inner side surface of the switch door (9), and two groups of magnets (10) are fixedly arranged at the opposite side edges of the two switch doors (9).

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