A device for testing the compressive strength of fused bricks

Abstract

This utility model relates to the field of compressive strength testing, specifically to a device for testing the compressive strength of fused bricks. It includes a base with a lifting mechanism at its top; a pressure transmission mechanism for detecting pressure is connected to the lifting mechanism; and clamping mechanisms for holding the fused bricks are movably connected to the four corners of the base's top. The support plate is bolted to the fixing holes on the top of the base via these clamping mechanisms, allowing for flexible position adjustment. Simultaneously, the cooperation of the toggle clamp, connecting sleeve, threaded rod, and clamping block allows for convenient changes in the clamping range. For fused bricks of different sizes, frequent clamp changes are unnecessary; simply adjusting the positions of the clamping mechanisms and clamping blocks enables rapid fixing of fused bricks of different sizes, greatly improving the adaptability of the testing device to fused bricks of varying sizes.

Description

Technical Field

[0001] This utility model belongs to the field of compressive strength testing, specifically relating to a device for testing the compressive strength of electrofused bricks. Background Technology

[0002] Electrofused bricks, as a high-performance refractory material, have extremely wide applications in many high-temperature industrial fields such as glass furnaces, metallurgy, and chemicals. For example, in glass furnaces, electrofused bricks directly withstand the scouring and erosion of high-temperature molten glass, as well as complex thermal stresses; their compressive strength directly affects the service life and operational stability of the furnace. In the metallurgical industry, electrofused bricks are used to build the linings of high-temperature furnaces, where they must withstand enormous pressure and structural stress changes under high-temperature environments.

[0003] To ensure that electrofused bricks can meet the stringent working conditions in actual use, it is crucial to accurately test their compressive strength.

[0004] However, in testing the compressive strength of fused bricks, the testing equipment has poor adaptability to fused bricks of different sizes. Rigid clamps or manual bolt fixing methods are often used, requiring frequent clamp changes or adjustments to the fixing position when dealing with fused bricks of different specifications and sizes, resulting in low operational efficiency. On the other hand, existing pressure application and testing mechanisms are insufficient in terms of accuracy and stability. During the testing process, it is difficult to accurately control the speed and magnitude of pressure application, leading to significant deviations in the test results and failing to accurately reflect the compressive strength of the fused bricks. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of existing electrofused brick compressive strength testing devices in the background art, such as poor adaptability to bricks of different sizes and the need for frequent clamp adjustments, as well as the low control accuracy and insufficient stability of the pressure application mechanism, thereby realizing an electrofused brick compressive strength testing device.

[0006] To achieve the above-mentioned objectives, the technical solution of this utility model is: a device for testing the compressive strength of fused bricks, comprising a base,

[0007] The base is equipped with a lifting mechanism at its top;

[0008] The lifting mechanism is connected to a pressure transmission mechanism for detecting pressure.

[0009] The four corners of the top of the base are movably connected to clamping mechanisms for holding electrofused bricks.

[0010] In the aforementioned electrofused brick compressive strength testing device, the lifting mechanism includes a lead screw and a transmission wheel;

[0011] The two lead screws are rotatably connected to both sides of the top of the base via bearings;

[0012] The bottom of each of the two lead screws is fixed with a rotating wheel.

[0013] In the above-mentioned electrofused brick compressive strength testing device, a drive motor is fixed on one side of the top of the base;

[0014] The output end of the drive motor is fixedly connected to the transmission wheel;

[0015] The drive wheel is connected to the two rotating wheels via belt drive.

[0016] In the above-mentioned electrofused brick compressive strength testing device, the pressure transmission mechanism includes a fixed rod, a sliding rod, and a return spring;

[0017] The two ends of the fixing rod are provided with internal threads that are compatible with the lead screw;

[0018] Connecting rods are fixed to both sides of the bottom of the fixed rod;

[0019] The four sliding rods are respectively slidably connected to the two ends of the two connecting rods.

[0020] In the above-mentioned electrofused brick compressive strength testing device, the top of the return spring abuts against the top of the sliding rod;

[0021] The bottom of the return spring abuts against the top of the connecting rod;

[0022] The bottom of all four sliding rods is connected to a pressing plate.

[0023] In the above-mentioned electrofused brick compressive strength testing device, the clamping mechanism includes a toggle clamp, a threaded rod, a clamping block, a connecting plate, and a support plate;

[0024] The base has several fixing holes on both sides of its top.

[0025] The four support plates are respectively connected to two of the fixing holes on the base by bolts;

[0026] Two elbow clamps are slidably connected to each of the support plates;

[0027] The output end of the toggle clamp is fixed with a connecting sleeve.

[0028] In the above-mentioned electrofused brick compressive strength testing device, one end of the threaded rod is threadedly connected to the connecting sleeve;

[0029] The other end of the threaded rod is rotatably connected to the connecting plate;

[0030] The connecting plate is fixed to the clamping block;

[0031] The clamping block has a right-angled groove on the side away from the connecting plate.

[0032] Compared with the prior art, the electrofused brick compressive strength testing device of this utility model has at least the following beneficial effects:

[0033] 1. This utility model's electrofused brick compressive strength testing device utilizes a clamping mechanism movably connected to the four corners of the base's top. The support plate is bolted to the fixing holes on the top of the base, allowing for flexible position adjustment. Simultaneously, the cooperation of the toggle clamp, connecting sleeve, threaded rod, and clamping block enables convenient changes to the clamping range. When dealing with electrofused bricks of different sizes, frequent clamp changes are unnecessary; simply adjusting the position of the clamping mechanism and the clamping block allows for rapid fixing of electrofused bricks of varying sizes, greatly improving the device's adaptability to different brick sizes and significantly enhancing operational efficiency.

[0034] 2. In the lifting mechanism, the drive motor rotates the transmission wheel, which in turn drives the two lead screws to rotate synchronously via belt transmission. This, in turn, drives the fixed rod to rise and fall smoothly. The fixed rod and lead screw of the pressure transmission mechanism are connected by internal threads. The arrangement of the connecting rod, sliding rod, and return spring allows for relatively precise pressure control when the extrusion plate applies pressure to the electrofused brick. During the testing process, pressure can be applied to the electrofused brick stably and uniformly, reducing the difficulty in controlling the speed and magnitude of pressure application, minimizing deviations in test results, and accurately reflecting the compressive strength of the electrofused brick. This effectively improves the accuracy and stability of the pressure application and testing mechanism. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the first overall structure of this utility model;

[0036] Figure 2 This is a schematic diagram of the second overall structure of this utility model;

[0037] Figure 3 This is a front view schematic diagram of the pressure transmission mechanism of this utility model;

[0038] Figure 4 This is a cross-sectional schematic diagram of the lifting mechanism of this utility model;

[0039] Figure 5 This is a schematic diagram of the installation position of the transmission wheel in this utility model;

[0040] Figure 6 This is a front view schematic diagram of the clamping mechanism of this utility model.

[0041] In the picture: 1. Base;

[0042] 2. Lifting mechanism; 201. Lead screw; 202. Transmission wheel; 203. Rotating wheel;

[0043] 3. Pressure transmission mechanism; 301. Fixed rod; 302. Connecting rod; 303. Return spring; 304. Sliding rod;

[0044] 4. Clamping mechanism; 401. Toggle clamp; 402. Connecting sleeve; 403. Threaded rod; 404. Clamping block; 405. Connecting plate; 406. Support plate;

[0045] 5. Extrusion plate; 6. Drive motor; 7. Fixing hole. Detailed Implementation

[0046] The compressive strength testing device for electrofused bricks of this utility model will be described in more detail below with reference to the accompanying drawings and specific embodiments.

[0047] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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.

[0048] This embodiment discloses a device for testing the compressive strength of fused bricks. Existing devices for testing the compressive strength of fused bricks have poor adaptability to bricks of different sizes and require frequent adjustment of the clamps. Furthermore, the pressure application mechanism suffers from low control accuracy and insufficient stability. Referring to… Figures 1-6 It mainly includes a base 1, a lifting mechanism 2 is provided on the top of the base 1, a pressure transmission mechanism 3 for detecting pressure is connected to the lifting mechanism 2, and clamping mechanisms 4 for clamping electrofused bricks are movably connected to the four corners of the top of the base 1.

[0049] A lifting mechanism 2 is provided on the top of the base 1. The lifting mechanism 2 adopts a double screw synchronous drive structure to ensure that the pressure transmission mechanism 3 moves smoothly in the vertical direction. The pressure transmission mechanism 3 for detecting pressure is connected to the lifting mechanism 2. Clamping mechanisms 4 for clamping electrofused bricks are movably connected to the four corners of the top of the base 1. Each clamping mechanism 4 is equipped with an independent position adjustment component.

[0050] Reference Figure 1 Figure 2 and Figure 4 Figure 5 as well as Figure 6The lifting mechanism 2 includes a lead screw 201 and a transmission wheel 202; the two lead screws 201 are rotatably connected to both sides of the top of the base 1 through bearings, and the bottom of the two lead screws 201 are respectively fixed with rotating wheels 203. A drive motor 6 is fixed to one side of the top of the base 1, and the output end of the drive motor 6 is fixedly connected to the transmission wheel 202. The transmission wheel 202 and the two rotating wheels 203 are connected by belt drive.

[0051] Two lead screws 201 are symmetrically arranged on both sides of the longitudinal axis at the top of the base 1 via high-precision bearing assemblies. Each lead screw 201 has a coaxially designed rotating wheel 203 fixedly connected to its bottom. The drive motor 6 is vertically mounted on the right edge of the top of the base 1 via a rigid bracket, and its output shaft is connected to the transmission wheel 202 via a keyway. The transmission wheel 202 and the two rotating wheels 203 form a three-stage transmission assembly, transmitting power via a high-strength annular belt. This belt uses a cross-wound installation process, forming a 180° envelope angle on the surface of the transmission wheel 202 to ensure smooth and synchronous power transmission. When the drive motor 6 starts, the transmission wheel 202 drives the two rotating wheels 203 to rotate in the same direction at the same speed through friction transmission, thereby driving the two lead screws 201 to perform precise helical motion. This dual-lead screw linkage design effectively avoids the off-center load phenomenon that may occur with single-sided drive. Combined with the preload adjustment function of the bearing assembly, the pressure detection mechanism 3 remains horizontal during lifting and lowering.

[0052] Reference Figures 1-3 The pressure transmission mechanism 3 includes a fixed rod 301, sliding rods 304, and a return spring 303. The fixed rod 301 has internal threads at both ends that are compatible with the lead screw 201. Connecting rods 302 are fixed to both sides of the bottom of the fixed rod 301. Four sliding rods 304 are slidably connected to the ends of two connecting rods 302. The top of the return spring 303 abuts against the top of the sliding rod 304, and the bottom of the return spring 303 abuts against the top of the connecting rod 302. A pressing plate 5 is connected to the bottom of all four sliding rods 304.

[0053] The fixed rod 301 forms a rigid helical transmission pair with the double lead screw 201 through its internal thread, ensuring high synchronization of lifting and lowering movements. The connecting rods 302, symmetrically arranged at the bottom of the fixed rod 301, extend laterally, forming a stable rectangular frame structure above the base 1. Each connecting rod 302 has linear guide components embedded at both ends, allowing the sliding rod 304 to move precisely in a straight line along the axial direction. The limiting step at the top of the sliding rod 304 forms a clearance fit with the inner hole of the connecting rod 302, and, in conjunction with the pre-compression installation of the return spring 303, provides initial pre-tightening force in the free state. The compressive strength of the electrofused brick is observed by the downward pressure of the extrusion plate 5.

[0054] Reference Figure 1 , Figure 2 and Figure 6The clamping mechanism 4 includes a toggle clamp 401, a threaded rod 403, a clamping block 404, a connecting plate 405, and a support plate 406. Several fixing holes 7 are provided on both sides of the top of the base 1. The four support plates 406 are respectively connected to two of the fixing holes 7 on the base 1 via bolts. Two toggle clamps 401 are slidably connected to each support plate 406, and a connecting sleeve 402 is fixed to the output end of each toggle clamp 401. One end of the threaded rod 403 is threadedly connected to the connecting sleeve 402, and the other end of the threaded rod 403 is rotatably connected to the connecting plate 405. The connecting plate 405 is fixed to the clamping block 404, and a right-angled groove is provided on the side of the clamping block 404 away from the connecting plate 405.

[0055] Each support plate 406 is equipped with a double-toggle clamp 401, forming an independent force application unit. Lifting and lowering are achieved via a vertical guide rail. Its rapid clamping mechanism utilizes a lever amplification principle, allowing operators to quickly establish and release clamping force with a single hand operation. The output shaft of the toggle clamp 401 is rigidly connected to the connecting sleeve 402. The threaded rod 403, through a trapezoidal thread, forms a helical transmission pair with the connecting sleeve 402. Combined with the ball-head connection structure at the end, the clamping block 404 automatically adapts to the tilt angle of the electrofused brick sidewall during force application. The working surface of the clamping block 404 adopts a double right-angle limiting design, forming a precise positioning reference through the intersection of the vertical and horizontal planes. While preventing horizontal displacement of the brick, its L-shaped structure effectively resists lateral torque generated during testing. When performing stacked testing, the upper clamping mechanism, through the vertical height adjustment function of the support plate 406, can quickly adapt to different stacking heights. Combined with the independent leveling mechanism of the threaded rod 403, it ensures that the positioning reference surfaces of the upper and lower clamping blocks 404 remain spatially parallel.

[0056] The working principle of the electrofused brick compressive strength testing device of this utility model is as follows: First, the electrofused brick is placed on the top of the base 1. Depending on the size of the electrofused brick, the position of the clamping mechanism 4 is changed to better fit the clamping block 404 on the clamping mechanism 4 with the electrofused brick. When testing the compressive strength of an electrofused brick, the toggle clamp 401 at the bottom of the clamping mechanism 4 is moved. The toggle clamp 401 pushes the connecting sleeve 402 and the threaded rod 403 to move. The threaded rod 403 pushes the connecting plate 405 and the clamping block 404 to move, so that the clamping block 404 fits tightly with the four corners of the electrofused brick. Alternatively, a gap can be left between the clamping block 404 and the electrofused brick to prevent the clamping block 404 from affecting the experimental data after it fits the electrofused brick.

[0057] When simultaneously testing the compressive strength of two electrofused bricks, the other electrofused brick is placed on top of the electrofused brick on the base 1. Then, depending on the height of the electrofused brick, the toggle clamp 401 at the top of the clamping mechanism 4 is raised and lowered. This allows the top clamping block 404 to better limit the electrofused brick, and a gap is left between the top clamping block 404 and the electrofused brick to prevent the clamping block 404 from adhering to the electrofused brick and affecting the experimental data.

[0058] Start the drive motor 6, which drives the transmission wheel 202 to rotate. The transmission wheel 202 drives two rotating wheels 203 to rotate via a belt. The rotating wheels 203 drive two lead screws 201 to rotate. The lead screws 201 drive the fixed rod 301 to descend. The fixed rod 301 drives the extrusion plate 5 to descend. The fixed rod 301 drives the connecting rod 302 to apply pressure to the extrusion plate 5. The extrusion plate 5 applies pressure to the electrofused brick and abuts against the bottom of the connecting rod 302.

[0059] It should be noted that, in actual implementation, the structure depicted in the accompanying drawings is not a fixed or unchanging embodiment. The components of the embodiments of this invention described and shown in these drawings can typically be arranged and designed in various different configurations. Furthermore, the accompanying drawings and abstract drawings are merely illustrative and do not represent the specific structure or actual quantity in a concrete implementation.

[0060] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The use of terms such as "a" or "an" in this specification and claims does not necessarily indicate a limitation on quantity. Terms such as "comprising" or "including" mean that the element or component preceding the word encompasses the element or component listed following the word and its equivalents, without excluding other elements or components. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0061] The exemplary embodiments of the present invention have been described in detail above with reference to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the concept of the present invention, and various combinations can be made to the various technical features and structures proposed by the present invention without exceeding the protection scope of the present invention.

Claims

1. A device for testing the compressive strength of fused bricks, comprising a base (1), characterized in that: The base (1) is provided with a lifting mechanism (2) on its top. The lifting mechanism (2) is connected to a pressure transmission mechanism (3) for detecting pressure. The four corners of the top of the base (1) are movably connected to clamping mechanisms (4) for clamping electrofused bricks.

2. The compressive strength testing device for electrofused bricks according to claim 1, characterized in that: The lifting mechanism (2) includes a lead screw (201) and a transmission wheel (202). The two lead screws (201) are rotatably connected to the two sides of the top of the base (1) via bearings; Rotating wheels (203) are fixed to the bottom of the two lead screws (201).

3. The compressive strength testing device for electrofused bricks according to claim 2, characterized in that: A drive motor (6) is fixed on one side of the top of the base (1). The output end of the drive motor (6) is fixedly connected to the transmission wheel (202). The drive wheel (202) is connected to the two rotating wheels (203) via belt drive.

4. The compressive strength testing device for electrofused bricks according to claim 2, characterized in that: The pressure transmission mechanism (3) includes a fixed rod (301), a sliding rod (304), and a return spring (303). The fixed rod (301) has internal threads at both ends that are compatible with the lead screw (201); Connecting rods (302) are fixed on both sides of the bottom of the fixed rod (301); The four sliding rods (304) are slidably connected to the two ends of the two connecting rods (302).

5. The compressive strength testing device for electrofused bricks according to claim 4, characterized in that: The return spring sleeve (303) is disposed on the outer periphery of the sliding rod (304), and the top of the return spring (303) abuts against the top of the sliding rod (304); The bottom of the return spring (303) abuts against the top of the connecting rod (302); The bottom of the four sliding rods (304) are connected to a pressing plate (5).

6. The compressive strength testing device for electrofused bricks according to claim 1, characterized in that: The clamping mechanism (4) includes a toggle clamp (401), a threaded rod (403), a clamping block (404), a connecting plate (405), and a support plate (406). The base (1) has several fixing holes (7) on both sides of its top. The four support plates (406) are respectively connected to two of the fixing holes (7) on the base (1) by bolts; Two elbow clamps (401) are slidably connected to each of the support plates (406); The output end of the toggle clamp (401) is fixed with a connecting sleeve (402).

7. The compressive strength testing device for electrofused bricks according to claim 6, characterized in that: One end of the threaded rod (403) is threadedly connected to the connecting sleeve (402); The other end of the threaded rod (403) is rotatably connected to the connecting plate (405); The connecting plate (405) is fixed to the clamping block (404); The clamping block (404) has a right-angled groove on the side away from the connecting plate (405).

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