Quality testing device for cement cover plate

Abstract

The invention relates to the technical field of cover plate quality detection, and discloses a cement cover plate quality testing device which comprises a base and a supporting frame, the supporting frame is fixedly connected to the upper end of the base, a hydraulic cylinder is fixedly installed at the upper end of the supporting frame, the output end of the hydraulic cylinder penetrates through the supporting frame, and the output end of the hydraulic cylinder is fixedly connected with a pressing plate. According to the cement cover plate stress testing device, stress testing of a cement cover plate is achieved through descending of the pressing plate, the protection cover ascends and descends synchronously along with the pressing plate through the protection assembly, fragments are effectively prevented from splashing in the testing process, and the safety of personnel and equipment is guaranteed; the detection assembly utilizes a built-in electric push rod to drive an electronic dial indicator to lift for measurement, the deformation data of the cover plate can be accurately obtained in real time, the shielding assembly enables a shielding plate to be automatically opened and closed along with the measurement action, external chippings are prevented from entering an instrument cavity, and the protection reliability and the measurement accuracy of the whole device are further enhanced.

Description

Technical Field

[0001] This invention relates to the field of cover plate quality testing technology, specifically a quality testing device for cement cover plates. Background Technology

[0002] Cement covers are precast concrete slab-shaped components widely used in municipal engineering, power facilities, and communication engineering. They are mainly used to cover underground ditches, pipe corridors, manholes, and other facilities, serving to bear ground loads, provide enclosure and protection, and beautify the environment. Since they directly bear external pressure, their compressive strength is the core indicator for measuring their quality and ensuring safe use. Therefore, after production and before use, scientific compressive strength tests must be conducted to verify whether they meet the design load-bearing requirements and prevent safety accidents and property losses caused by cover cracking and collapse.

[0003] Existing cement cover plate compressive strength testing devices mostly involve placing the cover plate directly on the testing platform. If the cover plate breaks due to improper operation, the high-speed flying fragments at the moment of rupture can easily cause personal injury to the operator and contaminate or even damage surrounding instruments and equipment. This creates a safety hazard in the testing environment and makes cleaning and maintenance quite troublesome. Secondly, in the deformation measurement stage, existing technologies often simply place the displacement sensor externally next to the pressure plate or base. This makes the sensor susceptible to damage from direct impacts by the downward pressure plate or flying fragments during testing. It is also prone to dust and moisture accumulation in daily use, seriously affecting measurement accuracy and instrument lifespan. Therefore, we propose a quality testing device for cement covers. Summary of the Invention

[0004] To address the problems mentioned in the background above, the present invention provides a quality testing device for cement cover plates.

[0005] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows.

[0006] A quality testing device for cement cover plates includes a base and a support frame. The support frame is fixedly connected to the upper end of the base. A hydraulic cylinder is fixedly installed on the upper end of the support frame. The output end of the hydraulic cylinder passes through the support frame and is fixedly connected to a pressure plate. A protective component is installed inside the base, and a detection component is installed inside the base.

[0007] Preferably, the protective assembly includes a lifting groove, a rack, a mounting frame, and a vertical plate. The upper end of the lifting groove is provided with a base. The lifting groove is arranged in a ring shape. The rack is fixedly connected to the side wall of the pressure plate. The mounting frame and the vertical plate are both fixedly connected to one side of the base. A protective cover is slidably connected inside the lifting groove. A one-way screw is rotatably connected to the inner wall of the mounting frame. A bevel gear is rotatably connected to the lower end of the mounting frame.

[0008] Preferably, the output end of the first bevel gear passes through the mounting frame and is fixedly connected to the lower end of the one-way screw. The two sides of the upright plate are respectively rotatably connected to the second bevel gear and the first spur gear. The first bevel gear and the second bevel gear mesh with each other, and the first spur gear and the first rack mesh with each other.

[0009] Preferably, a lifting port is provided on one side of the inner wall of the lifting groove, and a lifting block is slidably connected in the lifting port. One end of the lifting block is fixedly connected to the side wall of the protective cover. The lifting block is threaded onto the outside of the one-way screw. A storage groove is provided on the protective cover, and the storage groove matches the rack.

[0010] Preferably, the detection component includes a placement cavity located in the middle of the base. The bottom inner wall of the placement cavity has a mounting groove, and an electric push rod is fixedly connected to the bottom inner wall of the mounting groove. A movable plate is fixedly connected to the output end of the electric push rod, and a support plate is fixedly connected to the upper end of the movable plate. An electronic dial indicator is fixedly installed on one side of the support plate. An outlet is provided on the top inner wall of the placement cavity, and the electronic dial indicator faces the outlet. A shielding component is installed inside the placement cavity to prevent debris from entering the placement cavity when cleaning the base.

[0011] Preferably, the shielding assembly includes two guide grooves, a rack and three spur gears. The two guide grooves are located on the upper sides of the inner wall of the placement cavity. The rack is fixedly connected to one side of the support plate. The three spur gears are rotatably connected to the inner wall of the placement cavity. Adjacent spur gears mesh with each other, and the rack and the lower spur gear mesh with each other.

[0012] Preferably, a baffle plate is slidably connected in both guide grooves, and a rack three is fixedly connected to the lower end of the baffle plate. The rack three meshes with the spur gear two located at the upper end.

[0013] Preferably, a permanent magnet is fixedly connected to one side of the shielding plate, and a metal block is fixedly connected to the upper part of one side of the inner wall of the placement cavity, with the permanent magnet facing the metal block.

[0014] Preferably, a connecting frame is fixedly connected to one side of the base near the top, and a control panel is fixedly connected to the upper surface of the connecting frame.

[0015] Preferably, the upper surface of the base is provided with anti-slip texture.

[0016] Compared with the prior art, the beneficial effects of this invention are as follows: 1. The protective component uses a rack and spur gear on the side wall of the pressure plate to automatically raise and lower the protective cover. When the hydraulic cylinder drives the pressure plate to press down for testing, the protective cover can rise synchronously from the annular lifting groove of the base, forming a protective barrier surrounding the test area. This can effectively prevent the high-speed splashing of fragments generated when the cement cover breaks under pressure, ensuring the safety of operators and the cleanliness of surrounding equipment.

[0017] 2. The core of the testing component is to drive the support plate and electronic dial indicator to rise and fall through the built-in electric push rod, thereby achieving precise measurement of the cover plate deformation. The electronic dial indicator is integrated into the placement cavity inside the base. It is only raised to contact the cover plate by the electric push rod when measurement is needed. This avoids damage from collisions with the pressure plate during testing and prevents daily contamination. Moreover, the electronic dial indicator can detect the minute deformation or displacement of the cover plate under pressure in real time with high precision. The data is objective and accurate, which helps to evaluate the compressive strength and quality of the cement cover plate, and improves testing efficiency and data reliability.

[0018] 3. The shielding assembly utilizes the rack and pinion mechanism driven by the lifting and lowering of the support plate to control the opening and closing of the shield. When the detection assembly is not working, the shield will automatically close under the transmission of the rack and pinion mechanism, tightly sealing the protrusion at the top of the placement cavity. When measurement is required, the support plate rises, which simultaneously opens the shield. This effectively prevents cement debris, dust, or liquid from falling into the placement cavity through the protrusion during the cleaning of the base platform, thus protecting the internal electronic dial indicator and electric push rod from contamination and damage, further enhancing the reliability of the protection. Attached Figure Description

[0019] Figure 1 A schematic diagram of the main structure of a quality testing device for cement cover plates; Figure 2 This is a schematic diagram of the structure of the protective component of the present invention; Figure 3 This is a cross-sectional view of the protective component of the present invention; Figure 4 This is a schematic diagram of the structure of the storage slot of the present invention; Figure 5 This is a schematic diagram of the structure of the detection component and the shielding component of the present invention; Figure 6 This is a schematic diagram of the permanent magnet structure of the present invention.

[0020] The labels in the attached diagram are: 1. Base; 2. Support frame; 3. Hydraulic cylinder; 4. Pressure plate; 5. Protective components; 501. Lifting slot; 502. Rack 1; 503. Mounting bracket; 504. Vertical plate; 505. Protective cover; 506. One-way screw; 507. Bevel gear 1; 508. Bevel gear 2; 509. Spur gear 1; 510. Lifting port; 511. Lifting block; 512. Storage slot; 6. Detection components; 601. Placement cavity; 602. Mounting slot; 603. Electric push rod; 604. Moving plate; 605. Support plate; 606. Electronic dial indicator; 607. Extension port; 7. Shielding components; 701. Guide slot; 702. Rack 2; 703. Spur gear 2; 704. Shielding plate; 705. Rack 3; 8. Permanent magnet; 9. Metal block; 10. Connecting frame; 11. Control panel. Detailed Implementation

[0021] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0022] Please see Figures 1-6 As shown, the present invention provides a technical solution: a quality testing device for cement cover plates, including a base 1 and a support frame 2. The support frame 2 is fixedly connected to the upper end of the base 1. A hydraulic cylinder 3 is fixedly installed on the upper end of the support frame 2. The output end of the hydraulic cylinder 3 passes through the support frame 2. A pressure plate 4 is fixedly connected to the output end of the hydraulic cylinder 3. A protective component 5 is installed inside the base 1. A detection component 6 is installed inside the base 1.

[0023] Furthermore, the base 1 serves as the stable foundation of the entire device, bearing all the loads during the test. The support frame 2 is fixed to the base 1, forming a support frame that provides a high-rigidity mounting point for the hydraulic cylinder 3. The hydraulic cylinder 3 serves as the power source, and the vertical reciprocating motion of its output end provides controllable pressure for the test. The pressure plate 4 is directly connected to the output end of the hydraulic cylinder 3, converting the hydraulic thrust into a vertical compressive force on the cement cover plate placed on the base 1. The stable frame formed by the base 1 and the support frame 2 ensures the stability and safety of the stress structure during the test. Using the hydraulic cylinder 3 as the power source, a continuous, stable, and precisely controllable large-range pressure can be provided to simulate the load conditions borne by the cement cover plate in actual use. The pressure plate 4, as the direct force-applying component, ensures that the pressure is applied evenly to the surface of the specimen through its planar structure, thereby making the compressive strength test results more accurate and reliable.

[0024] In the preferred embodiment of this technical solution, please refer to Figures 1-4As shown, the protective component 5 includes a lifting groove 501, a rack 502, a mounting bracket 503, and a vertical plate 504. The upper end of the lifting groove 501 is provided with the upper end of the base 1. The lifting groove 501 is arranged in a ring shape. The rack 502 is fixedly connected to the side wall of the pressure plate 4. The mounting bracket 503 and the vertical plate 504 are both fixedly connected to one side of the base 1. A protective cover 505 is slidably connected inside the lifting groove 501. A one-way screw 506 is rotatably connected to the inner wall of the mounting bracket 503. A bevel gear 507 is rotatably connected to the lower end of the mounting bracket 503. The output end of bevel gear 507 passes through the mounting bracket 503, and the output end of bevel gear 507 is fixedly connected to the lower end of the one-way screw 506. Bevel gear 508 and spur gear 509 are rotatably connected to both sides of the vertical plate 504, respectively. Bevel gear 507 and bevel gear 508 mesh with each other, and spur gear 509 and rack 502 mesh with each other. A lifting port 510 is provided on the inner wall of one side of the lifting groove 501. A lifting block 511 is slidably connected in the lifting port 510. One end of the lifting block 511 is fixedly connected to the side wall of the protective cover 505. The lifting block 511 is threaded onto the outside of the one-way screw 506. A storage groove 512 is provided on the protective cover 505. The storage groove 512 matches the rack 502.

[0025] Furthermore, when the pressure plate 4 descends, the rack 502 fixed to the side wall of the pressure plate 4 moves accordingly. The rack 502 drives the spur gear 509 meshing with it to rotate. The spur gear 509 drives the coaxial bevel gear 508 to rotate, thus transmitting power to the bevel gear 507. The bevel gear 507 is fixedly connected to the one-way screw 506, thereby driving the one-way screw 506 to rotate. The lifting block 511, threaded onto the one-way screw 506, moves linearly along the lifting port 510, and drives the protective cover 505 fixed thereto to slide within the annular lifting groove 501. The storage groove 512 on the protective cover 505 serves as a passage for the rack 502. By providing space to avoid interference, the pressure plate 4 is used as a power source to automatically raise and lower the protective cover 505 through a transmission chain consisting of rack 502, spur gear 509, bevel gear 508, bevel gear 507, one-way screw 506, and lifting block 511. When raised, it can effectively surround the test area to prevent cement fragments from splashing and ensure safety. After lowering, it is stored in the lifting slot 501 of the base 1. The structure is compact and does not occupy extra space. The storage slot 512 is used to provide lifting and accommodating space for rack 502 to avoid interference between the protective cover 505 and rack 502 when the protective cover 505 is raised.

[0026] In the preferred embodiment of this technical solution, please refer to Figure 5As shown, the detection component 6 includes a placement cavity 601, which is located in the middle of the base 1. The bottom inner wall of the placement cavity 601 has a mounting groove 602. An electric push rod 603 is fixedly connected to the bottom inner wall of the mounting groove 602. A moving plate 604 is fixedly connected to the output end of the electric push rod 603. A support plate 605 is fixedly connected to the upper end of the moving plate 604. An electronic dial indicator 606 is fixedly installed on one side of the support plate 605. An extension opening 607 is provided on the top inner wall of the placement cavity 601. The electronic dial indicator 606 is directly opposite the extension opening 607. A shielding component 7 is installed in the placement cavity 601 to prevent debris from entering the placement cavity 601 when cleaning the base 1.

[0027] Furthermore, the placement cavity 601, serving as the internal space to accommodate the measuring mechanism, provides a protective environment that isolates the precision components from the outside world. The mounting groove 602 at the bottom of the placement cavity 601 is used to fix and install the power source. The electric push rod 603 is fixed within the mounting groove 602. The telescopic movement of the output end of the electric push rod 603 provides precise linear displacement. The moving plate 604 is fixedly connected to the output end of the electric push rod 603, transmitting the driving force to the upper structure. The support plate 605 is fixed to the moving plate 604, serving as a mounting platform. The side walls of the support plate 605 are fixed... An electronic micrometer 606 is fixedly installed. The electronic micrometer 606 is used for high-precision measurement of displacement or deformation. The extension port 607 is opened at the top of the placement cavity 601, providing a channel for the probe of the electronic micrometer 606 to extend and contact the cement cover plate being measured. The electric push rod 603 drives the moving plate 604 and the support plate 605 to rise and fall as a whole, thereby causing the electronic micrometer 606 to extend or retract into the placement cavity 601. When measurement is required, the probe of the electronic micrometer 606 extends through the extension port 607 and contacts the lower surface of the cover plate to detect the deformation of the cover plate under pressure.

[0028] It is worth noting that the electronic micrometer 606 is existing technology, including a contact probe, a high-sensitivity displacement sensor, a signal processing circuit, and a digital display. When the probe contacts the surface of the object being measured and undergoes a slight displacement, the internal displacement sensor converts this mechanical displacement into a corresponding electrical signal. This electrical signal is amplified, processed, and converted from analog to digital by a precision circuit, and finally displayed on the screen in real time in a digital form with micron-level precision, thereby achieving accurate measurement of the deformation or size change of the object. This will not be elaborated further here.

[0029] In the preferred embodiment of this technical solution, please refer to Figure 5As shown, the shielding assembly 7 includes two guide grooves 701, a rack 702, and three spur gears 703. The two guide grooves 701 are opened on the upper sides of the inner wall of the placement cavity 601. The rack 702 is fixedly connected to one side of the support plate 605. The three spur gears 703 are rotatably connected to the inner wall of the placement cavity 601. Adjacent spur gears 703 mesh with each other, and the rack 702 meshes with the lower spur gear 703. A baffle plate 704 is slidably connected in both guide grooves 701. A rack 3 705 is fixedly connected to the lower end of the baffle plate 704. The rack 3 705 and the upper spur gear 2 703 mesh with each other.

[0030] Furthermore, the rack 2 702 fixed to one side of the support plate 605 moves with the rise and fall of the support plate 605, and drives the lower spur gear 2 703 meshing with it to rotate. The three meshing spur gears 2 703 transmit the rotational motion. The upper spur gear 2 703 meshes with the rack 3 705 fixed to the lower end of the baffle plate 704, thereby converting the rotational motion into the sliding of the baffle plate 704 in the two guide grooves 701. That is, the baffle plate 704 automatically closes when the measuring probe of the electronic micrometer 606 retracts and automatically opens when the probe extends. The two guide grooves 701 ensure the smooth movement and precise alignment of the baffle plate 704, and can effectively close the extension opening 607 automatically during non-measuring periods to prevent debris and dust generated during cleaning or testing from falling into the placement cavity 601 below, thus reliably protecting the internal measuring instruments.

[0031] In the preferred embodiment of this technical solution, please refer to Figure 5 and Figure 6 As shown, a permanent magnet 8 is fixedly connected to one side of the baffle plate 704, and a metal block 9 is fixedly connected to the upper part of one side of the inner wall of the placement cavity 601, with the permanent magnet 8 facing the metal block 9.

[0032] Furthermore, the permanent magnet 8 fixedly connected to one side of the baffle 704 and the metal block 9 fixedly connected to the upper part of the inner wall of the placement cavity 601 work together. When the baffle 704 moves to the position where the protrusion 607 is fully exposed under the drive of the transmission mechanism, the permanent magnet 8 on one side of the baffle 704 moves to the position where it is directly opposite and closely close to the metal block 9. The two generate magnetic attraction, which provides an additional holding force for the closed state of the baffle 704. By utilizing the magnetic attraction between the permanent magnet 8 and the metal block 9, the baffle 704 can be firmly attached to the cavity opening after it is opened to the position, which effectively enhances the tightness of the closure and the anti-vibration stability, thereby more reliably preventing external dust or debris from entering the interior of the placement cavity 601 from the protrusion 607.

[0033] In the preferred embodiment of this technical solution, please refer to Figure 1 and Figure 2 As shown, a connecting frame 10 is fixedly connected to one side of the base 1 near the top, and a control panel 11 is fixedly connected to the upper surface of the connecting frame 10.

[0034] Furthermore, the connecting frame 10 serves as a support structure, which securely raises and fixes the control panel 11 in a position that is easy for the operator to observe and access. The control panel 11 serves as the human-machine interaction and command center of the device, centrally integrating or connecting the electronic control system. The operator uses it to input commands, control the test process, and receive and display test data in real time, realizing centralized, convenient, and precise control of the entire test device. This greatly simplifies the operation process and improves the test efficiency and the controllability and readability of the results.

[0035] In the preferred embodiment of this technical solution, please refer to Figure 1 and Figure 2 As shown, the upper surface of the base 1 is provided with anti-slip texture.

[0036] Furthermore, anti-slip textures are directly machined or provided on the upper surface of the base 1. The micro-protrusion structure of the textured surface generates static friction with the cement cover plate specimen placed on it, which can reduce test errors or safety risks caused by accidental movement of the specimen.

[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A quality testing device for cement cover plates, comprising a base (1) and a support frame (2), characterized in that: The support frame (2) is fixedly connected to the upper end of the base (1). A hydraulic cylinder (3) is fixedly installed on the upper end of the support frame (2). The output end of the hydraulic cylinder (3) passes through the support frame (2). A pressure plate (4) is fixedly connected to the output end of the hydraulic cylinder (3). A protective component (5) is installed inside the base (1). A detection component (6) is installed inside the base (1).

2. The quality testing device for cement cover plates according to claim 1, characterized in that: The protective component (5) includes a lifting groove (501), a rack (502), a mounting bracket (503), and a vertical plate (504). The upper end of the lifting groove (501) is provided with the upper end of the base (1). The lifting groove (501) is arranged in a ring shape. The rack (502) is fixedly connected to the side wall of the pressure plate (4). The mounting bracket (503) and the vertical plate (504) are both fixedly connected to one side of the base (1). A protective cover (505) is slidably connected inside the lifting groove (501). A one-way screw (506) is rotatably connected to the inner wall of the mounting bracket (503). A bevel gear (507) is rotatably connected to the lower end of the mounting bracket (503).

3. The quality testing device for cement cover plates according to claim 2, characterized in that: The output end of the first bevel gear (507) passes through the mounting bracket (503), and the output end of the first bevel gear (507) is fixedly connected to the lower end of the one-way screw (506). The two sides of the upright plate (504) are respectively rotatably connected to the second bevel gear (508) and the first spur gear (509). The first bevel gear (507) and the second bevel gear (508) mesh with each other, and the first spur gear (509) and the first rack (502) mesh with each other.

4. The quality testing device for cement cover plates according to claim 3, characterized in that: The inner wall of one side of the lifting groove (501) is provided with a lifting port (510), and a lifting block (511) is slidably connected in the lifting port (510). One end of the lifting block (511) is fixedly connected to the side wall of the protective cover (505). The lifting block (511) is threaded on the outside of the one-way screw (506). The protective cover (505) is provided with a storage groove (512), and the storage groove (512) matches the rack (502).

5. The quality testing device for cement cover plates according to claim 1, characterized in that: The detection component (6) includes a placement cavity (601), which is located in the middle of the base (1). The bottom inner wall of the placement cavity (601) is provided with an installation groove (602). An electric push rod (603) is fixedly connected to the bottom inner wall of the installation groove (602). A moving plate (604) is fixedly connected to the output end of the electric push rod (603). A support plate (605) is fixedly connected to the upper end of the moving plate (604). An electronic dial indicator (606) is fixedly installed on one side of the support plate (605). An outlet (607) is provided on the top inner wall of the placement cavity (601). The electronic dial indicator (606) is directly opposite the outlet (607). A shielding component (7) is installed in the placement cavity (601) to prevent debris from entering the placement cavity (601) when cleaning the base (1).

6. The quality testing device for cement cover plates according to claim 5, characterized in that: The shielding assembly (7) includes two guide grooves (701), a rack (702), and three spur gears (703). The two guide grooves (701) are opened on the upper side of the inner wall of the placement cavity (601). The rack (702) is fixedly connected to one side of the support plate (605). The three spur gears (703) are rotatably connected to the inner wall of the placement cavity (601). The adjacent spur gears (703) mesh with each other. The rack (702) and the lower spur gears (703) mesh with each other.

7. A quality testing device for cement cover plates according to claim 6, characterized in that: A baffle plate (704) is slidably connected in both guide grooves (701). A rack three (705) is fixedly connected to the lower end of the baffle plate (704). The rack three (705) meshes with the spur gear two (703) at the upper end.

8. A quality testing device for cement cover plates according to claim 7, characterized in that: A permanent magnet (8) is fixedly connected to one side of the shield (704), and a metal block (9) is fixedly connected to the upper part of the inner wall of one side of the placement cavity (601), with the permanent magnet (8) facing the metal block (9).

9. A quality testing device for cement cover plates according to claim 1, characterized in that: A connecting frame (10) is fixedly connected to one side of the base (1) near the top, and a control panel (11) is fixedly connected to the upper surface of the connecting frame (10).

10. A quality testing device for cement cover plates according to claim 1, characterized in that: The upper surface of the base (1) is provided with anti-slip texture.

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