Calibrating device for concrete impermeability instrument

Abstract

The utility model relates to the field of concrete anti-permeability instrument calibration, in particular to a concrete anti-permeability instrument calibration device which comprises a connecting disc, a screw hole is formed in the connecting disc along the axis, more than two strip-shaped mounting holes are formed in the connecting disc around the screw hole in the circumferential direction, and the strip-shaped mounting holes are used for being connected with a concrete test piece connecting port of an anti-permeability instrument. More than two groups of inner annular grooves are formed in the side, close to the screw hole, of the strip-shaped mounting hole in the bottom surface of the connecting disc, more than two groups of outer annular grooves are formed in the side, away from the screw hole, of the strip-shaped mounting hole in the bottom surface of the connecting disc, and sealing rings are arranged in the inner annular grooves and the outer annular grooves; and the standard pressure gauge is in threaded connection with the screw hole. According to the concrete anti-permeability instrument calibration device, the application range of the device is widened, the structural sealing performance between the connecting disc and the concrete test piece connecting port is improved, and the problem that the calibration precision is reduced due to air pressure leakage caused by installation errors or device aging is solved.

Description

Technical Field

[0001] The utility model relates to the field of calibration of concrete impermeability meters, in particular to a calibration device for concrete impermeability meters. Background Technique

[0002] The impermeability performance of concrete refers to the performance of the materials used in structures to resist the penetration of water, oil or other liquid media under pressure. It is an important index for evaluating the quality and durability of concrete, and it is also a mandatory inspection index for strict quality control of concrete by each engineering quality supervision station. When testing the impermeability of concrete with a concrete impermeability meter, the sleeve mold with concrete specimens is installed on the interface of the concrete impermeability meter through bolts. The knob of the valve is opened, and the initial pressure value of the water outlet device is set. The water outlet device supplies water to the concrete specimens in the sleeve mold. At regular intervals, a certain amount of water pressure needs to be increased. The impermeability grade of the concrete specimens is obtained by observing whether there is water seepage on the top surface of the concrete specimens and formula conversion. The structure of the existing calibration device for concrete impermeability meters can refer to the Chinese utility model patent with the application number CN202123162081.X and the name of Portable Calibration Device for Concrete Impermeability Meter, and the Chinese utility model patent with the application number CN202221770574.3 and the name of A Reverse Pressure Device for Concrete Impermeability Meter. The connection structure between the traditional calibration device for concrete impermeability meters and the impermeability meter has the disadvantage of poor sealing reliability. When the locking position at the interface of the concrete impermeability meter changes, or the calibration device becomes aged and deformed after long-term use, resulting in a decrease in sealing performance, it will affect the calibration accuracy. Content of the Utility Model

[0003] In order to overcome the defects of the above-mentioned prior art, the technical problem to be solved by the utility model is to provide a calibration device for a concrete impermeability meter with a reliable sealing installation structure and high calibration accuracy.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a calibration device for a concrete impermeability meter, comprising:

[0005] A connecting disk, the connecting disk is provided with a threaded hole along the axis, two or more strip-shaped mounting holes are arranged around the threaded hole along the circumferential direction, the strip-shaped mounting holes are used to connect the concrete specimen connection ports of the impermeability meter, two or more groups of inner annular grooves are arranged on the bottom surface of the connecting disk on the side close to the threaded hole of the strip-shaped mounting holes, two or more groups of outer annular grooves are arranged on the bottom surface of the connecting disk on the side far from the threaded hole of the strip-shaped mounting holes, and sealing rings are arranged in both the inner annular grooves and the outer annular grooves;

[0006] A standard pressure gauge, the standard pressure gauge is threadedly connected to the threaded hole.

[0007] Further, it also includes a rubber seal. The rubber seal is threadedly connected to the screw hole. The rubber seal is provided with an assembly hole along the axis, and the standard pressure gauge is threadedly connected to the assembly hole.

[0008] Further, the number of both the inner annular groove and the outer annular groove is two groups.

[0009] Further, the cross-sectional shapes of both the inner annular groove and the outer annular groove are rectangular. The widths of the inner annular groove and the outer annular groove are greater than the diameter of the sealing ring, and the depths of the inner annular groove and the outer annular groove are less than the diameter of the sealing ring.

[0010] Further, the connecting disk is provided with folding legs.

[0011] The beneficial effects of the present utility model are as follows: A calibration device for a concrete impermeability tester is provided. The screw hole in the middle of the connecting disk is used to install a calibration standard pressure gauge. The strip-shaped mounting holes arranged around the screw hole can adapt to and lock multiple specifications of connecting ports of concrete specimens with different numbers and positions, expanding the applicable range of the device while improving the stability of the locking structure. On the connecting surface between the connecting disk and the connecting port of the concrete specimen, two-stage or more sealing structures are respectively arranged on the inner and outer sides of the strip-shaped mounting holes. By installing a sealing ring in the outer annular groove, the problem of low reliability of the connecting structure caused by the dimensional accuracy problem between the connecting disk and the connecting port of the concrete specimen is eliminated, improving the stability and reliability of the calibration device. By installing a sealing ring in the inner annular groove, the structural sealing between the connecting disk and the connecting port of the concrete specimen is ensured, avoiding the problem of reduced calibration accuracy caused by air leakage due to installation errors or device aging. By comparing the values of the standard pressure gauge and the pressure gauge to be inspected of the concrete impermeability tester, the pressure gauge to be inspected of the concrete impermeability tester can be calibrated. Description of the Drawings

[0012] Figure 1 The figure shows a structural schematic diagram of the calibration device for a concrete impermeability tester according to an embodiment of the present utility model;

[0013] Figure 2 The figure shows a structural schematic diagram of the connecting disk according to an embodiment of the present utility model;

[0014] Figure 3 The figure shows a cross-sectional view of the connecting disk according to an embodiment of the present utility model;

[0015] Label Description:

[0016] 1. Connecting disk; 11. Screw hole; 12. Strip-shaped mounting hole; 13. Inner annular groove;

[0017] 14. Outer annular groove; 15. Sealing ring; 16. Folding leg; 2. Standard pressure gauge; 3. Rubber seal; 31. Assembly hole; 4. Connecting port of concrete specimen. Specific embodiments

[0018] To describe in detail the technical content, achieved objectives and effects of the present utility model, the following is described in conjunction with the embodiments and with reference to the accompanying drawings.

[0019] The present utility model provides a calibration device for a concrete impermeability tester, which is applied to the calibration operation of a concrete impermeability tester.

[0020] Please refer to Figures 1 to 3 As shown, a calibration device for a concrete impermeability tester of the present utility model includes:

[0021] A connection plate 1, the connection plate 1 is provided with a threaded hole 11 along the axis, and two or more strip-shaped mounting holes 12 are arranged around the threaded hole 11 in the circumferential direction. The strip-shaped mounting holes 12 are used to connect the concrete specimen connection port 4 of the impermeability tester. On the bottom surface of the connection plate 1, on the side of the strip-shaped mounting hole 12 close to the threaded hole 11, there are two or more groups of inner annular grooves 13, and on the bottom surface of the connection plate 1, on the side of the strip-shaped mounting hole 12 far from the threaded hole 11, there are two or more groups of outer annular grooves 14. Sealing rings 15 are arranged in both the inner annular grooves 13 and the outer annular grooves 14;

[0022] A standard pressure gauge 2, which is threadedly connected to the threaded hole 11.

[0023] As can be seen from the above description, the beneficial effects of the present utility model are as follows: A calibration device for a concrete impermeability tester is provided. The threaded hole 11 in the middle of the connection plate 1 is used to install the calibration standard pressure gauge 2. The strip-shaped mounting holes 12 arranged around the threaded hole 11 can adapt to and lock a variety of concrete specimen connection ports 4 with different numbers and positions, expanding the applicable range of the device while improving the stability of the locking structure. On the connection surface between the connection plate 1 and the concrete specimen connection port 4, two or more levels of sealing structures are respectively arranged on the inner and outer sides of the strip-shaped mounting hole 12. By installing the sealing ring 15 in the outer annular groove 14, the problem of low reliability of the connection structure caused by the dimensional accuracy problems between the connection plate 1 and the concrete specimen connection port 4 is eliminated, improving the stability and reliability of the calibration device. By installing the sealing ring 15 in the inner annular groove 13, the structural sealing between the connection plate 1 and the concrete specimen connection port 4 is ensured, avoiding the problem of reduced calibration accuracy caused by air pressure leakage due to installation errors or device aging. By comparing the values of the standard pressure gauge 2 and the pressure gauge to be inspected of the concrete impermeability tester, the pressure gauge to be inspected of the concrete impermeability tester can be calibrated.

[0024] In an alternative embodiment, it further includes a rubber seal 3, the rubber seal 3 is threadedly connected to the threaded hole 11, the rubber seal 3 is provided with an assembly hole 31 along the axis, and the standard pressure gauge 2 is threadedly connected to the assembly hole 31.

[0025] From the above description, it can be seen that the rubber seal 3 can improve the sealing performance of the matching structure between the standard pressure gauge 2 and the assembly hole 31, thereby ensuring the calibration accuracy.

[0026] In an optional embodiment, the number of the inner annular grooves 13 and the number of the outer annular grooves 14 are both two.

[0027] It can be seen from the above description that both the inner annular groove 13 and the outer annular groove 14 are arranged in multiple stages, which improves the sealing and reliability of the connection structure between the connection plate 1 and the concrete specimen connection port 4 .

[0028] In an optional embodiment, the cross-sectional shapes of the inner annular groove 13 and the outer annular groove 14 are both rectangular, the widths of the inner annular groove 13 and the outer annular groove 14 are greater than the diameter of the sealing ring 15 , and the depths of the inner annular groove 13 and the outer annular groove 14 are less than the diameter of the sealing ring 15 .

[0029] From the above description, it can be seen that through the above structure, after the connection plate 1 and the concrete specimen connection port 4 are assembled, the sealing ring 15 always remains in a squeezed state, thereby ensuring the sealing and reliability of the connection structure between the connection plate 1 and the concrete specimen connection port 4.

[0030] In an optional embodiment, the connection plate 1 is provided with folding legs 16 .

[0031] From the above description, it can be seen that the connection plate 1 is provided with folding legs 16, which is convenient for the user to carry the connection plate 1, and can also be supported by the folding legs 16 when storing to prevent the device from being bumped and worn.

[0032] The working principle of the utility model is: when in use, the strip-shaped mounting hole 12 of the connecting plate 1 is locked and fixed with the lock hole provided on the concrete specimen connecting port 4 of the impermeability tester through a fastener, and by maintaining a stable positive pressure state in the impermeability tester, the standard pressure gauge 2 of the device is compared with the pressure gauge to be tested of the impermeability tester, so that the pressure gauge to be tested of the concrete impermeability tester can be calibrated.

[0033] Please refer to Figures 1 to 3 As shown, the first embodiment of the utility model is: a concrete impermeability meter calibration device, comprising:

[0034] A connecting plate 1, wherein the connecting plate 1 is provided with a screw hole 11 along the axis, and the connecting plate 1 is provided with two or more strip-shaped mounting holes 12 along the circumferential direction around the screw hole 11, and the strip-shaped mounting hole 12 is used to connect the concrete specimen connection port 4 of the impermeability tester, and the bottom surface of the connecting plate 1 is located on the side of the strip-shaped mounting hole 12 close to the screw hole 11 and is provided with two or more groups of inner annular grooves 13, and the bottom surface of the connecting plate 1 is located on the side of the strip-shaped mounting hole 12 away from the screw hole 11 and is provided with two or more groups of outer annular grooves 14, and sealing rings 15 are provided in both the inner annular grooves 13 and the outer annular grooves 14;

[0035] A standard pressure gauge 2, and the standard pressure gauge 2 is threadedly connected to the threaded hole 11.

[0036] It further includes a rubber seal 3, the rubber seal 3 is threadedly connected to the threaded hole 11, the rubber seal 3 is provided with an assembly hole 31 along the axis, and the standard pressure gauge 2 is threadedly connected to the assembly hole 31. The number of the inner annular groove 13 and the outer annular groove 14 is two groups each. The cross-sectional shapes of the inner annular groove 13 and the outer annular groove 14 are both rectangular, the widths of the inner annular groove 13 and the outer annular groove 14 are greater than the diameter of the sealing ring 15, and the depths of the inner annular groove 13 and the outer annular groove 14 are less than the diameter of the sealing ring 15. The connecting disk 1 is provided with folding legs 16.

[0037] In summary, the present utility model provides a calibration device for a concrete impermeability tester. The threaded hole in the middle of the connecting disk is used to install a calibrated standard pressure gauge. The strip-shaped mounting holes arranged around the threaded hole can be adapted to lock and connect a variety of specifications of concrete specimen connection ports with different numbers and positions, expanding the applicable range of the device while improving the stability of the locking structure. On the connection surface between the connecting disk and the concrete specimen connection port, more than two levels of sealing structures are respectively arranged on the inner and outer sides of the strip-shaped mounting holes. By installing a sealing ring in the outer annular groove, the problem of low reliability of the connection structure caused by the dimensional accuracy problem between the connecting disk and the concrete specimen connection port is eliminated, improving the stability and reliability of the calibration device. By installing a sealing ring in the inner annular groove, the structural sealing between the connecting disk and the concrete specimen connection port is ensured, avoiding the problem of reduced calibration accuracy caused by air leakage due to installation errors or device aging. By comparing the values of the standard pressure gauge and the pressure gauge to be inspected of the concrete impermeability tester, the pressure gauge to be inspected of the concrete impermeability tester can be calibrated.

[0038] The above are only the embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in the related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A concrete impermeability tester calibration device, characterized in that: include: A connecting plate, wherein the connecting plate is provided with a screw hole along the axis, wherein the connecting plate is provided with two or more strip-shaped mounting holes in a circumferential direction around the screw hole, wherein the strip-shaped mounting hole is used to connect to a concrete specimen connection port of a water-resistance tester, wherein the bottom surface of the connecting plate is located on a side of the strip-shaped mounting hole close to the screw hole and is provided with two or more sets of inner annular grooves, wherein the bottom surface of the connecting plate is located on a side of the strip-shaped mounting hole away from the screw hole and is provided with two or more sets of outer annular grooves, wherein sealing rings are provided in both the inner annular grooves and the outer annular grooves; A standard pressure gauge is threadedly connected to the screw hole.

2. The concrete impermeability tester calibration device according to claim 1, characterized in that: It also includes a rubber seal, which is threadedly connected to the screw hole. The rubber seal is provided with an assembly hole along the axis, and the standard pressure gauge is threadedly connected to the assembly hole.

3. The concrete impermeability tester calibration device according to claim 1, characterized in that: The number of the inner annular grooves and the number of the outer annular grooves are both two.

4. The concrete impermeability tester calibration device according to claim 1, characterized in that: The cross-sectional shapes of the inner annular groove and the outer annular groove are both rectangular, the widths of the inner annular groove and the outer annular groove are greater than the diameter of the sealing ring, and the depths of the inner annular groove and the outer annular groove are less than the diameter of the sealing ring.

5. The concrete impermeability tester calibration device according to claim 1, characterized in that: The connecting plate is provided with folding legs.

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