Concrete permeability tester

Abstract

The utility model relates to the technical field of concrete, in particular to a concrete permeability tester which comprises a box body, and a power supply for supplying power is arranged in front of the box body. A rotating disc is rotated to drive a screw rod to rotate, a corresponding movable block can be driven to slide downwards along a sliding groove, and a movable U-shaped plate can be extruded through a connecting rod, so that the movable U-shaped plate extrudes, fixes and seals a concrete test piece placed on one side of a fixed U-shaped plate, and the sealing performance of the concrete test piece is improved; solutions in the first chamber and the second chamber are prevented from flowing mutually through a gap, the sealing performance is enhanced, the accuracy of test data is improved, potential safety hazards when the first conductive net and the second conductive net are electrified can be prevented through the arrangement of the first protective cover and the second protective cover, so that the test is normally carried out, and the test efficiency is improved. And moreover, the distance between the movable U-shaped plate and the fixed U-shaped plate is variable, so that concrete test pieces with different thicknesses can be tested, test data are increased, and the preparation of the test data is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete, in particular to a concrete permeability tester. Background Art

[0002] Concrete is a multiphase, inhomogeneous, porous composite system. When there is pressure, concentration and potential difference on the relative surfaces, material migration will occur. Since hydraulic structures such as dams, canals, culverts and submarine tunnels, once the anti-seepage performance does not meet the requirements, it will cause engineering accidents such as pollution and leakage. Permeability is the most important indicator to measure the durability of concrete. The permeability of concrete refers to the difficulty of gas, liquid or ion to penetrate, diffuse or migrate in concrete under the action of pressure, chemical potential or electric field. Commonly used concrete permeability test methods include: water permeability method, air permeability method, chlorine pool immersion method and electrical quantity method.

[0003] Chinese utility model patent CN207866672U discloses a concrete permeability tester, which is provided with a conductive mesh connected to a positive electrode and a conductive mesh connected to a negative electrode, and a permeation solution with chloride ions and deionized water are placed in corresponding chambers, a concrete specimen is placed in a card slot and sealed with waterproof glue to separate the two solutions, and then the conductive mesh is energized. Under the action of the electric field, it is convenient to accelerate the movement of negative ions in the permeation solution toward the direction of the deionized water, accelerate the penetration, and conduct the test.

[0004] However, in the above-mentioned prior art, since the manufactured concrete specimen itself cannot guarantee the flatness of the concrete surface, the sealing is not good after the concrete specimen is placed in the slot, and waterproof glue is used for waterproofing. Therefore, when testing multiple sample parts, the waterproof glue needs to be removed and the concrete specimen needs to be taken off, which is complicated to operate. In addition, since power must be turned on during the test, the conductive network is exposed and the safety is low. Utility Model Content

[0005] The utility model aims to provide a concrete permeability tester, which has the characteristics of good sealing performance, accurate test data and high safety in use.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a concrete permeability tester, comprising a box, a power supply for power supply is arranged at the front of the box, a first chamber and a second chamber are respectively opened on the inner side of the box, the first chamber is used to place a chloride ion penetration solution, and the second chamber is used to place deionized water, a fixed U-shaped plate is fixedly installed at the center of the box, a concrete specimen for testing is placed between the first chamber and the second chamber, the left side of the concrete specimen is in contact with the right side of the fixed U-shaped plate, a first conductive net and a second conductive net are respectively arranged on the inner side of the box, and a sealing assembly is arranged at the center of the box;

[0007] The sealing assembly includes a movable U-shaped plate and two fixed rods, a sliding groove is opened on one side of the fixed rod, a movable block is slidably installed on the inner side of the sliding groove, a connecting rod is arranged between the movable block and the movable U-shaped plate, a screw is rotatably installed on the side of the fixed rod away from the movable U-shaped plate, a turntable is fixedly installed on the top of the screw, the screw is threadedly sleeved with the movable block, and the screw is used to lift and lower the movable block.

[0008] In order to increase the sealing effect, as a preferred concrete permeability tester of the utility model, the sealing assembly also includes a cylinder, the cylinder is slidably connected to the fixed rod, and the cylinder is perpendicular to the fixed rod, and sealing pads are provided on the sides of the movable U-shaped plate and the fixed U-shaped plate that are close to each other.

[0009] In order to accelerate penetration, as a preferred concrete permeability tester of the utility model, the first conductive mesh corresponds to the first chamber, the second conductive mesh corresponds to the second chamber, and the first conductive mesh and the second conductive mesh are respectively connected to the negative and positive electrodes of the power supply.

[0010] In order to increase the safety of use, as a preferred concrete permeability tester of the utility model, a first protective cover is provided on the top of the box body, the first protective cover corresponds to the first chamber, a first conductive head is fixedly installed on the top of the first protective cover, and the bottom end of the first conductive head is fixedly connected to the first conductive net.

[0011] In order to increase the safety of use, as a preferred concrete permeability tester of the utility model, a second protective cover is provided on the top of the box body, the second protective cover corresponds to the second chamber, a second conductive head is fixedly installed on the top of the second protective cover, and the bottom end of the second conductive head is fixedly connected to the second conductive mesh.

[0012] In order to facilitate the placement and support of the first protective cover and the second protective cover, as a preferred concrete permeability tester of the utility model, handles are fixedly installed on the top of the first protective cover and the second protective cover, and three pads are fixedly installed on the inner sides of the first chamber and the second chamber, and the pads are used to support the corresponding first protective cover and the second protective cover.

[0013] In order to facilitate the separate collection of solutions, as a preferred concrete permeability tester of the utility model, two drainage pipes are fixedly installed on the front of the box body, and the two drainage pipes correspond to the first chamber and the second chamber respectively.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] By rotating the turntable to drive the screw to rotate, the corresponding movable block can be driven to slide downward along the slide groove, and the movable U-shaped plate can be squeezed by the connecting rod, so that the movable U-shaped plate squeezes and fixes the concrete specimen placed on one side of the fixed U-shaped plate to increase the sealing of the concrete specimen, avoid the mutual flow of solutions in the first chamber and the second chamber through the gap, strengthen the sealing, and improve the accuracy of the test data. The setting of the first protective cover and the second protective cover can prevent the safety hazards when the first conductive network and the second conductive network are energized, so that the test can be carried out normally. In addition, the setting of the variable distance between the movable U-shaped plate and the fixed U-shaped plate can test concrete specimens of different thicknesses, increase the test data and improve the preparation of the test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is one of the three-dimensional structural diagrams of the utility model;

[0017] Figure 2 This is the second three-dimensional structural diagram of the utility model;

[0018] Figure 3 It is a partial structural diagram of the utility model;

[0019] Figure 4 This is a structural diagram of the sealing component of the utility model.

[0020] In the figure: 1. box; 2. power supply; 3. concrete specimen; 4. first protective cover; 5. second protective cover; 6. drain pipe; 7. fixed U-shaped plate; 8. first chamber; 9. second chamber; 10. movable U-shaped plate; 11. handle; 12. first conductive head; 13. first conductive net; 14. second conductive head; 15. second conductive net; 16. fixed rod; 17. screw; 18. turntable; 19. slide groove; 20. movable block; 21. connecting rod; 22. cylinder; 23. cushion block. DETAILED DESCRIPTION

[0021] See also Figures 1 to 4 A concrete permeability tester comprises a box body 1, a power supply 2 for power supply is arranged in front of the box body 1, a first chamber 8 and a second chamber 9 are respectively opened on the inner side of the box body 1, the first chamber 8 is used to place a chloride ion penetration solution, and the second chamber 9 is used to place deionized water, a fixed U-shaped plate 7 is fixedly installed at the center of the box body 1, a concrete specimen 3 for testing is placed between the first chamber 8 and the second chamber 9, the left side of the concrete specimen 3 is in contact with the right side of the fixed U-shaped plate 7, a first conductive mesh 13 and a second conductive mesh 15 are respectively arranged on the inner side of the box body 1, and a sealing component is arranged at the center of the box body 1.

[0022] The sealing assembly includes a movable U-shaped plate 10 and two fixed rods 16. A slide groove 19 is provided on one side of the fixed rod 16. A movable block 20 is slidably installed on the inner side of the slide groove 19. A connecting rod 21 is provided between the movable block 20 and the movable U-shaped plate 10. A screw rod 17 is rotatably installed on the side of the fixed rod 16 away from the movable U-shaped plate 10. A turntable 18 is fixedly installed on the top of the screw rod 17. The screw rod 17 is threadedly sleeved with the movable block 20. The screw rod 17 is used to lift and lower the movable block 20.

[0023] In this embodiment: a connecting rod 21 is arranged between the movable block 20 and the movable U-shaped plate 10, a screw 17 is rotatably installed on the side of the fixed rod 16 away from the movable U-shaped plate 10, and a turntable 18 is fixedly installed on the top of the screw 17. By rotating the turntable 18 to drive the screw 17 to rotate, the corresponding movable block 20 can be driven to slide downward along the slide groove 19, and the movable U-shaped plate 10 can be squeezed by the connecting rod 21, so that the movable U-shaped plate 10 squeezes, fixes and seals the concrete specimen 3 placed on one side of the fixed U-shaped plate 7, thereby increasing the sealing of the concrete specimen 3 and improving the accuracy of the test data. The first conductive mesh 13 and the second conductive mesh 15 are respectively arranged on the inner side of the box body 1. The first protective cover 4 and the second protective cover 5 can prevent the safety hazards when the first conductive mesh 13 and the second conductive mesh 15 are energized, so that the test can be carried out normally.

[0024] As a technical optimization solution of the utility model, the sealing assembly also includes a cylinder 22, which is slidably connected to the fixed rod 16 and is perpendicular to the fixed rod 16. A sealing gasket is provided on the side where the movable U-shaped plate 10 and the fixed U-shaped plate 7 are close to each other.

[0025] In this embodiment: sealing pads are provided on the sides where the movable U-shaped plate 10 and the fixed U-shaped plate 7 are close to each other, so that the placed concrete specimen 3 can be well squeezed and sealed, thereby improving the isolation of the concrete specimen 3 from the solutions in the first chamber 8 and the second chamber 9 and increasing the sealing efficiency. By setting a variable distance between the movable U-shaped plate 10 and the fixed U-shaped plate 7, concrete specimens 3 of different thicknesses can be tested, thereby increasing the test data and improving the readiness of the test data.

[0026] As a technical optimization solution of the utility model, the first conductive grid 13 corresponds to the first chamber 8, the second conductive grid 15 corresponds to the second chamber 9, and the first conductive grid 13 and the second conductive grid 15 are respectively connected to the negative electrode and the positive electrode of the power supply 2.

[0027] In this embodiment, the first conductive mesh 13 and the second conductive mesh 15 are connected to the negative electrode and the positive electrode of the power source 2 respectively. Under the action of the electric field, the negative ions of the permeation solution in the first chamber 8 are accelerated to move toward the second chamber 9 where the deionized water is placed, thereby accelerating the permeation.

[0028] As a technical optimization solution of the utility model, a first protective cover 4 is provided on the top of the box body 1, the first protective cover 4 corresponds to the first chamber 8, a first conductive head 12 is fixedly installed on the top of the first protective cover 4, and the bottom end of the first conductive head 12 is fixedly connected to the first conductive net 13; a second protective cover 5 is provided on the top of the box body 1, the second protective cover 5 corresponds to the second chamber 9, a second conductive head 14 is fixedly installed on the top of the second protective cover 5, and the bottom end of the second conductive head 14 is fixedly connected to the second conductive net 15.

[0029] In this embodiment: by providing the first protective cover 4 and the second protective cover 5, when the first conductive net 13 and the second conductive net 15 are powered on, they can be isolated by the first protective cover 4 and the second protective cover 5, thereby increasing the safety of the tester.

[0030] As a technical optimization solution of the utility model, a handle 11 is fixedly installed on the top of the first protective cover 4 and the second protective cover 5, and three pads 23 are fixedly installed on the inner sides of the first chamber 8 and the second chamber 9, and the pads 23 are used to support the corresponding first protective cover 4 and the second protective cover 5.

[0031] In this embodiment, by providing the cushion block 23 , the first protective cover 4 and the second protective cover 5 corresponding to the first chamber 8 and the second chamber 9 can be placed and supported.

[0032] As a technical optimization solution of the present invention, two drainage pipes 6 are fixedly installed on the front of the box body 1, and the two drainage pipes 6 correspond to the first chamber 8 and the second chamber 9 respectively.

[0033] In this embodiment: the two drainage pipes 6 correspond to the first chamber 8 and the second chamber 9 respectively, so that the solutions in the corresponding first chamber 8 and the second chamber 9 can be discharged through the drainage pipes 6, and the solutions in the first chamber 8 and the second chamber 9 can be collected respectively.

[0034] Working principle: After the manufactured concrete specimen 3 reaches the curing age, the surface of the concrete specimen 3 is roughened with a steel brush, and then the concrete specimen 3 is placed between the fixed U-shaped plate 7 and the movable U-shaped plate 10, and then the screw 17 is driven to rotate by rotating the turntable 18, which can drive the corresponding movable block 20 to slide downward along the slide groove 19, and the movable U-shaped plate 10 can be squeezed by the connecting rod 21, so that the movable U-shaped plate 10 squeezes and fixes the concrete specimen 3 placed on one side of the fixed U-shaped plate 7 to increase the sealing of the concrete specimen 3, and then the permeate containing chloride ions is poured into the first chamber 8. The permeation solution is poured into the second chamber 9, and then the first protective cover 4 is covered on the first chamber 8, and the second protective cover 5 is covered on the second chamber 9. Then, the first conductive net 13 is connected to the negative electrode of the power supply 2 through the first conductive head 12, and the second conductive net 15 is connected to the positive electrode of the power supply 2 through the second conductive head 14. When the power is turned on, under the action of the electric field, the negative ions of the permeation solution in the first chamber 8 are accelerated to move toward the direction of the second chamber 9 where the deionized water is placed, and the permeation is accelerated. Finally, the chloride ion concentration in the deionized water is tested by the chemical reagent titration method, so as to measure the permeability of the concrete.

[0035] The standard parts used in the utility model can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of various parts adopt the conventional means such as mature rivets and welding in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. All electrical equipment in the utility model are powered by an external power supply.

[0036] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A concrete permeability tester, comprising a box (1), wherein a power supply (2) for power supply is arranged in front of the box (1), characterized in that: The box (1) is provided with a first chamber (8) and a second chamber (9) on the inner side thereof, the first chamber (8) being used to store a chloride ion permeation solution, and the second chamber (9) being used to store deionized water. A fixed U-shaped plate (7) is fixedly installed at the center of the box (1). A concrete specimen (3) for testing is placed between the first chamber (8) and the second chamber (9), and the left side of the concrete specimen (3) is in contact with the right side of the fixed U-shaped plate (7). A first conductive mesh (13) and a second conductive mesh (15) are provided on the inner side thereof, and a sealing assembly is provided at the center of the box (1); The sealing assembly comprises a movable U-shaped plate (10) and two fixed rods (16), a slide groove (19) is provided on one side of the fixed rod (16), a movable block (20) is slidably mounted on the inner side of the slide groove (19), a connecting rod (21) is provided between the movable block (20) and the movable U-shaped plate (10), a screw rod (17) is rotatably mounted on the side of the fixed rod (16) away from the movable U-shaped plate (10), a rotating disk (18) is fixedly mounted on the top end of the screw rod (17), the screw rod (17) is threadedly sleeved with the movable block (20), and the screw rod (17) is used to lift and lower the movable block (20).

2. A concrete permeability tester according to claim 1, characterized in that: The sealing assembly further comprises a cylinder (22), the cylinder (22) being slidably sleeved with the fixed rod (16), and the cylinder (22) is perpendicular to the fixed rod (16), and a sealing gasket is provided on the side where the movable U-shaped plate (10) and the fixed U-shaped plate (7) are close to each other.

3. A concrete permeability tester according to claim 1, characterized in that: The first conductive net (13) corresponds to the first chamber (8), the second conductive net (15) corresponds to the second chamber (9), and the first conductive net (13) and the second conductive net (15) are respectively connected to the negative electrode and the positive electrode of the power source (2).

4. A concrete permeability tester according to claim 1, characterized in that: A first protective cover (4) is arranged on the top of the box body (1), the first protective cover (4) corresponds to the first chamber (8), a first conductive head (12) is fixedly mounted on the top of the first protective cover (4), and the bottom end of the first conductive head (12) is fixedly connected to the first conductive net (13).

5. A concrete permeability tester according to claim 4, characterized in that: A second protective cover (5) is arranged on the top of the box body (1), the second protective cover (5) corresponds to the second chamber (9), a second conductive head (14) is fixedly mounted on the top of the second protective cover (5), and the bottom end of the second conductive head (14) is fixedly connected to the second conductive net (15).

6. A concrete permeability tester according to claim 5, characterized in that: A handle (11) is fixedly mounted on the top of each of the first protective cover (4) and the second protective cover (5), and three cushion blocks (23) are fixedly mounted on the inner sides of each of the first chamber (8) and the second chamber (9), wherein the cushion blocks (23) are used to support the corresponding first protective cover (4) and the second protective cover (5).

7. A concrete permeability tester according to claim 1, characterized in that: Two liquid discharge pipes (6) are fixedly mounted on the front of the box body (1), and the two liquid discharge pipes (6) correspond to the first chamber (8) and the second chamber (9) respectively.

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