A concrete penetrometer

Abstract

The utility model discloses a kind of concrete penetration resistance instrument, including base, support pole and display, the upper end of the base is connected with the display by the support pole, further include elevating gear fixed on the top of the base;The outer side of the support pole is slidably sleeved with sliding sleeve, one side of the sliding sleeve outer wall is fixedly connected with lifting block, the other side of the sliding sleeve outer wall is fixedly connected with support sleeve rod, and the lifting execution end of the elevating gear is drivingly connected with the lifting block;Further include pressing rod, the one end of the support sleeve rod away from the support pole is detachably connected with telescopic rod by moving assembly, the one end of the telescopic rod away from the support sleeve rod is fixedly connected with detection head, the bottom of the detection head is fixed with penetration needle, the top of the detection head is fixed with first mounting rod.The utility model, by elevating gear, the height of penetration needle is adjusted, the height of penetration needle is adjusted, to adapt to different height cement test mould.

Description

Technical Field

[0001] This utility model relates to the field of cement testing technology, and in particular to a concrete penetration resistance meter. Background Technology

[0002] The concrete penetration resistance meter is a specialized instrument used to determine the setting time of concrete mixtures. This instrument is mainly used in the fields of construction engineering and materials testing, and is suitable for evaluating the quality of concrete under different cement types, admixtures, and environmental conditions.

[0003] Existing concrete penetration resistance meters often have height deviations when testing different cement molds due to differences in the processing precision of each mold. If the mold is too high, the penetration needle may sink excessively; if the mold is too low, the penetration needle may not contact the cement paste at the preset depth, resulting in inaccurate penetration depth measurement data and affecting the test results. Therefore, a new concrete penetration resistance meter is proposed to solve these problems. Utility Model Content

[0004] (a) Purpose of the utility model To address the technical problems existing in the background art, this utility model proposes a concrete penetration resistance meter, which adjusts the height of the penetration needle through a lifting mechanism to adapt to cement molds of different heights.

[0005] (II) Technical Solution This utility model provides a concrete penetration resistance meter, including a base, a support rod, and a display. The upper end of the base is connected to the display through the support rod. It also includes a lifting mechanism fixedly mounted on the top of the base. A sliding sleeve is slidably sleeved on the outer side of the support rod. One side of the outer wall of the sliding sleeve is fixedly connected to a lifting block, and the other side of the outer wall of the sliding sleeve is fixedly connected to a support rod. The lifting execution end of the lifting mechanism is drivenly connected to the lifting block. It also includes a pressure rod, the end of the support sleeve rod away from the support rod is detachably connected to the telescopic rod via a movable component, the end of the telescopic rod away from the support sleeve rod is fixedly connected to the detection head, the bottom of the detection head is fixedly fitted with a penetrating needle, the top of the detection head is fixedly fitted with a first mounting rod, and the top of the telescopic rod is fixedly fitted with a second mounting rod; one end of the pressure rod is rotatably connected to the second mounting rod, and the middle part of the pressure rod is rotatably connected to the first mounting rod.

[0006] Furthermore, the lifting mechanism includes a support frame, a drive motor, and a threaded rod. The support frame and the drive motor are both fixedly mounted on the top of the base, and the drive motor is located inside the support frame. The threaded rod is arranged vertically, and the middle part of the threaded rod is connected to the lifting block through a threaded hole for transmission. The bottom of the threaded rod penetrates the bottom plate of the support frame and is coaxially and fixedly connected to the output shaft of the drive motor through a coupling.

[0007] Furthermore, a limiting block for limiting the travel of the lifting block is fixedly installed at the top of the threaded rod, and the middle part of the threaded rod rotatably passes through the upper end face of the support frame via a bearing.

[0008] Furthermore, the movable component includes an opening, a threaded hole, and a fixing bolt. A plurality of the threaded holes are equidistantly opened on the side of the telescopic rod along the length direction of the telescopic rod. The end of the telescopic rod facing the support rod is slidably inserted into the internal cavity of the support sleeve rod. The opening is opened on the side of the support sleeve rod. The screw end of the fixing bolt passes through the opening and is threadedly engaged with one of the threaded holes.

[0009] Furthermore, a reinforcing plate is fixedly installed at the bottom of the support sleeve rod, and the upper surface of the reinforcing plate is in close contact with the lower end face of the telescopic rod.

[0010] Furthermore, it also includes a sliding groove, which is formed through the middle of the pressure rod along the length direction of the pressure rod; the end of the first mounting rod away from the detection head is slidably connected to the pressure rod through the sliding groove.

[0011] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects: This concrete penetration resistance meter uses a drive motor as the power source, based on the height of the cement mold, to rotate the threaded rod. Since the lifting block and the threaded rod are connected through a threaded hole, and the lifting block is slidably connected to the support rod through a sliding sleeve, the rotational motion of the threaded rod is converted into the linear lifting motion of the lifting block. The lifting block drives the sliding sleeve, support sleeve rod, telescopic rod, and penetration needle to rise and fall synchronously, thereby adjusting the height of the penetration needle to accommodate cement molds of different heights. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a concrete penetration resistance meter proposed in this utility model.

[0013] Figure 2 This is an exploded view of the moving component in a concrete penetration resistance meter proposed in this utility model.

[0014] Figure 3This is a perspective view of the pressure rod during installation in a concrete penetration resistance meter proposed in this utility model.

[0015] Reference numerals: 1. Display; 2. Limiting block; 3. Threaded rod; 4. Support rod; 5. Lifting block; 6. Sliding sleeve; 7. Support frame; 8. Drive motor; 9. Base; 10. Support sleeve rod; 11. Fixing bolt; 12. Reinforcing plate; 13. Telescopic rod; 14. Penetrating needle; 15. Detection head; 16. First mounting rod; 17. Pressure rod; 18. Second mounting rod; 19. Opening; 20. Threaded hole; 21. Sliding groove. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0017] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, such as welding, riveting, or bonding; it can also be a detachable connection, such as threaded connection, keyed connection, or pin connection; or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; or it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] like Figure 1-3As shown, the present invention proposes a concrete penetration resistance meter, which includes a base 9, a support rod 4 and a display 1. The upper end of the base 9 is connected to the display 1 through the support rod 4, and can display the penetration resistance data in real time. It also includes a lifting mechanism fixedly mounted on the top of the base 9. A sliding sleeve 6 is slidably sleeved on the outer side of the support rod 4. One side of the outer wall of the sliding sleeve 6 is fixedly connected to the lifting block 5, and the other side of the outer wall of the sliding sleeve 6 is fixedly connected to the support sleeve rod 10. The lifting execution end of the lifting mechanism is connected to the lifting block 5 through a transmission. It also includes a pressure rod 17, and the end of the support sleeve rod 10 away from the support rod 4 is detachably connected to the telescopic rod 13 via a movable component. The end of the telescopic rod 13 away from the support sleeve rod 10 is fixedly connected to the detection head 15. The bottom of the detection head 15 is fixedly equipped with a penetrating needle 14, the top of the detection head 15 is fixedly equipped with a first mounting rod 16, and the top of the telescopic rod 13 is fixedly equipped with a second mounting rod 18. One end of the pressure rod 17 is rotatably connected to the second mounting rod 18, and the middle part of the pressure rod 17 is rotatably connected to the first mounting rod 16.

[0020] It should be noted that the data processing module integrated inside the display 1 and the pressure sensor integrated inside the base 9 are connected by a wire (the wire is hidden inside the cavity of the support rod 4), which can display the penetration resistance data in real time and avoid the wire from being exposed and damaged, thus ensuring the stability of signal transmission; (the data processing module integrated inside the display 1 and the pressure sensor integrated inside the base 9 are not mentioned in the claims and are conventional detection modules).

[0021] The internal cavity of the support sleeve 10 has a rectangular cross-section, and the cross-sectional shape of the telescopic rod 13 is adapted to the cavity of the support sleeve 10, and the fit gap between the two does not exceed 0.3mm. The free end of the pressure rod 17 is fitted with a rubber anti-slip sleeve. The surface of the anti-slip sleeve has a textured surface to increase the friction between the hand and the pressure rod 17 and prevent the hand from slipping when pressing. The penetration needle 14 is made of high-hardness alloy material, with a needle tip angle of 60°±2° and a needle tip diameter that can be selected according to testing requirements (common specifications are 1mm, 2mm, and 5mm). The penetration needle 14 is connected to the bottom of the testing head 15 by a thread, and after connection, the perpendicularity of the penetration needle 14 needs to be calibrated by a dial indicator to ensure that when the penetration needle 14 is inserted into the cement slurry, the force direction is always perpendicular to the bottom surface of the mold.

[0022] In this embodiment, the lifting mechanism includes a support frame 7, a drive motor 8, and a threaded rod 3. The support frame 7 and the drive motor 8 are both fixedly mounted on the top of the base 9, and the drive motor 8 is located inside the support frame 7. The threaded rod 3 is arranged vertically, and the middle part of the threaded rod 3 is connected to the lifting block 5 through a threaded hole for transmission. The bottom of the threaded rod 3 penetrates the bottom plate of the support frame 7 and is coaxially and fixedly connected to the output shaft of the drive motor 8 through a coupling.

[0023] It should be noted that when starting the drive motor 8: if the test mold is too high, the drive motor 8 will drive the threaded rod 3 to rotate, and the lifting block 5 will move upward along the threaded rod 3, which will drive the support sleeve rod 10, the telescopic rod 13 and the insertion needle 14 to rise through the sliding sleeve 6; if the test mold is too low, the drive motor 8 will drive the threaded rod 3 to rotate in the opposite direction, and the lifting block 5 will move downward, which will simultaneously drive the insertion needle 14 to descend.

[0024] In this embodiment, a limiting block 2 for limiting the stroke of the lifting block 5 is fixedly installed at the top of the threaded rod 3, and the middle part of the threaded rod 3 and the upper end face of the support frame 7 are rotatably connected through a bearing.

[0025] It should be noted that the limiting block 2 can prevent the lifting block 5 from disengaging from the threaded rod 3 during the upward process, while the bearing reduces the frictional resistance between the threaded rod 3 and the support frame 7 when the threaded rod 3 rotates, thereby improving the service life.

[0026] In this embodiment, the movable component includes an opening 19, a threaded hole 20, and a fixing bolt 11. Multiple threaded holes 20 are equidistantly opened on the side of the telescopic rod 13 along the length direction of the telescopic rod 13. The end of the telescopic rod 13 facing the support rod 4 is slidably inserted into the internal cavity of the support sleeve rod 10, and the opening 19 is opened on the side of the support sleeve rod 10. The screw end of the fixing bolt 11 passes through the opening 19 and is threadedly engaged with one of the threaded holes 20.

[0027] It should be noted that by selecting different positions of the threaded hole 20 to cooperate with the fixing bolt 11, the length of the telescopic rod 13 extending out of the support sleeve 10 can be adjusted, so as to adjust it according to the user's usage habits.

[0028] In this embodiment, a reinforcing plate 12 is fixedly installed at the bottom of the support sleeve rod 10, and the upper surface of the reinforcing plate 12 is in contact with the lower end face of the telescopic rod 13.

[0029] It should be noted that the reinforcing plate 12 can prevent the telescopic rod 13 from bending and deforming due to force during the testing process, thus ensuring the perpendicularity of the penetration needle 14.

[0030] In this embodiment, a sliding groove 21 is also included, which is opened through the middle of the pressure rod 17 along the length direction of the pressure rod 17; the end of the first mounting rod 16 away from the detection head 15 is slidably connected to the pressure rod 17 through the sliding groove 21.

[0031] It should be noted that the sliding groove 21 allows the first mounting rod 16 to slide along the length of the pressure rod 17. When the pressure rod 17 rotates, the downward angle and force of the detection head 15 can be flexibly adjusted to ensure that the penetration needle 14 can be inserted into the cement slurry.

[0032] Working principle: The cement mold to be tested is placed on the base 9, with the mold directly below the penetration needle 14. Then, according to the height of the mold, the drive motor 8 is started to drive the threaded rod 3 to rotate. Since the lifting block 5 and the threaded rod 3 are connected through a threaded hole, and the lifting block 5 is slidably connected to the support rod 4 through the sliding sleeve 6, the rotational motion of the threaded rod 3 is converted into the linear lifting motion of the lifting block 5. The lifting block 5 drives the sliding sleeve 6, the support sleeve rod 10, the telescopic rod 13, and the penetration needle 14 to rise and fall synchronously, thereby adjusting the height of the penetration needle 14 to accommodate cement molds of different heights and ensure that the penetration needle 14 can contact the cement slurry at a preset depth. After adjustment, the drive motor 8 is turned off. When testing the cement mold, the cement mold is first placed on the testing platform of the base 9. The operator presses the free end (power end) of the pressure rod 17, and the force is transmitted to the first mounting rod 16 (resistance end) through the sliding groove 21 in the middle. The sliding groove 21 allows the first mounting rod 16 to slide along the pressure rod 17, ensuring that the testing head 15 always remains vertically pressed down when the pressure rod 17 rotates, and the penetration needle 14 is evenly inserted into the cement slurry. At the same time, the reinforcing plate 12 supports the telescopic rod 13, preventing the telescopic rod 13 from bending under force and ensuring the verticality of the penetration needle 14.

[0033] The base 9 integrates a pressure sensor. When the penetration needle 14 is inserted into the cement slurry, the pressure sensor collects the penetration resistance signal and converts the signal into an electrical signal, which is then transmitted to the display 1. The display 1 processes the electrical signal and displays the penetration resistance value in real time, making it convenient for operators to read and record the test data. After the test, the pressure rod 17 is lifted upwards, and the penetration needle 14 is reset with the test head 15. The above steps can be repeated after the test mold is replaced.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A concrete penetration resistance meter, comprising a base (9), a support rod (4), and a display (1), wherein the upper end of the base (9) is connected to the display (1) via the support rod (4), characterized in that, It also includes a lifting mechanism fixed to the top of the base (9); the outer side of the support rod (4) is provided with a sliding sleeve (6), one side of the outer wall of the sliding sleeve (6) is fixedly connected to the lifting block (5), the other side of the outer wall of the sliding sleeve (6) is fixedly connected to the support sleeve rod (10), and the lifting execution end of the lifting mechanism is connected to the lifting block (5) in a transmission connection. It also includes a pressure rod (17), one end of the support sleeve rod (10) away from the support rod (4) is detachably connected to the telescopic rod (13) via a moving component, one end of the telescopic rod (13) away from the support sleeve rod (10) is fixedly connected to the detection head (15), the bottom of the detection head (15) is fixedly fitted with a penetrating needle (14), the top of the detection head (15) is fixedly fitted with a first mounting rod (16), and the top of the telescopic rod (13) is fixedly fitted with a second mounting rod (18); one end of the pressure rod (17) is rotatably connected to the second mounting rod (18), and the middle part of the pressure rod (17) is rotatably connected to the first mounting rod (16).

2. The concrete penetration resistance meter according to claim 1, characterized in that, The lifting mechanism includes a support frame (7), a drive motor (8), and a threaded rod (3). The support frame (7) and the drive motor (8) are both fixedly mounted on the top of the base (9), and the drive motor (8) is located inside the support frame (7). The threaded rod (3) is arranged vertically, and the middle part of the threaded rod (3) is connected to the lifting block (5) through a threaded hole. The bottom of the threaded rod (3) passes through the bottom plate of the support frame (7) and is coaxially fixedly connected to the output shaft of the drive motor (8) through a coupling.

3. A concrete penetration resistance meter according to claim 2, characterized in that, The top of the threaded rod (3) is fixedly fitted with a limiting block (2) for limiting the stroke of the lifting block (5), and the middle part of the threaded rod (3) and the upper end face of the support frame (7) are rotatably connected through a bearing.

4. A concrete penetration resistance meter according to claim 1, characterized in that, The movable component includes an opening (19), a threaded hole (20), and a fixing bolt (11). A plurality of the threaded holes (20) are equidistantly opened on the side of the telescopic rod (13) along the length direction of the telescopic rod (13). The end of the telescopic rod (13) facing the support rod (4) is slidably inserted into the internal cavity of the support sleeve rod (10). The opening (19) is opened on the side of the support sleeve rod (10). The screw end of the fixing bolt (11) passes through the opening (19) and is threadedly engaged with one of the threaded holes (20).

5. A concrete penetration resistance meter according to claim 1, characterized in that, The bottom of the support sleeve (10) is fixedly fitted with a reinforcing plate (12), and the upper surface of the reinforcing plate (12) is in contact with the lower end face of the telescopic rod (13).

6. A concrete penetration resistance meter according to claim 1, characterized in that, It also includes a sliding groove (21), which is opened through the middle of the pressure rod (17) along the length direction of the pressure rod (17); the end of the first mounting rod (16) away from the detection head (15) is slidably connected to the pressure rod (17) through the sliding groove (21).

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