A steam pressure concrete block strength testing device

Abstract

This utility model provides a steam-pressurized concrete block strength testing device, including a frame, a support installed at the lower part of the frame, a top seat installed at the top of the frame, an inverted manual jack installed on the top seat, two sets of symmetrically arranged hook springs suspended between the movable end of the manual jack and the top seat, vertical cylinders connected to the frame on both sides of the manual jack, two limiting heads with an outer diameter smaller than the inner diameter of the vertical cylinder are slidably installed in the vertical cylinder, and a bent rod is installed on the opposite side of the two limiting heads in one vertical cylinder, with a ring installed at the end of the bent rod away from the limiting head, and the two rings corresponding to one vertical cylinder are respectively sleeved on the two ends of the hook springs, and cylinder caps are threaded to both ends of the vertical cylinder, with the cylinder caps sleeved on the bent rods. This utility model has the following beneficial effects: it prevents the hook springs from falling off and splashing randomly, improving safety.

Description

Technical Field

[0001] This utility model is a steam-pressurized concrete block strength testing device, belonging to the technical field of steam-pressurized concrete block strength testing. Background Technology

[0002] Autoclaved aerated concrete (AAC) blocks, as a lightweight, energy-saving building material with good thermal insulation properties, are widely used in modern construction. Their strength is a key indicator for evaluating the quality and performance of the blocks, directly affecting the structural safety and stability of buildings. Therefore, accurate and scientific testing of the strength of AAC blocks is of great significance for ensuring the quality of construction projects, regulating the building materials market, and promoting technological development in the industry. A pressure testing machine is used for compressive strength testing. The pressure testing machine should have sufficient range and accuracy and be calibrated. During the test, the specimen is placed between the upper and lower pressure plates of the pressure testing machine, ensuring that the center of the specimen is aligned with the center of the machine. Loading process: Apply pressure uniformly at a specified loading rate until the specimen fails. Record the maximum load value at specimen failure and calculate the compressive strength according to the formula: f = P / A, where f is the compressive strength (MPa), P is the failure load (N), and A is the area of ​​the specimen subjected to pressure (mm²). 2 ).

[0003] Among the many power sources for pressure testing machines, manual jacks are commonly used. In actual operation, to ensure the manual jack can quickly return to its initial position after extension, the use of a hook spring is a common method. The hook spring, through its elastic tension, causes the manual jack to quickly return to its initial position after completing the lifting task, effectively improving work efficiency. However, after prolonged and frequent use, hook springs can develop problems. The hook portion at its end, due to long-term stress, is prone to fatigue. When fatigue accumulates to a certain level, the hook may detach from the corresponding engagement part. Once the hook detaches, the hook spring, which was originally under tension, will instantly lose its restraint and easily scatter in all directions under the force of its elasticity. This situation poses a significant safety threat to surrounding operators and equipment, potentially leading to personal injury, equipment damage, and other serious consequences, representing a safety hazard that cannot be ignored. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a steam-pressurized concrete block strength testing device to solve the problems mentioned in the background section. This invention also prevents the hook spring from detaching and splashing out randomly, thus improving safety.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a steam-pressurized concrete block strength testing device, comprising a frame, a support installed at the lower part of the frame, a top seat installed at the top of the frame, an inverted manual jack installed on the top seat, a pressure gauge installed on the cylinder of the manual jack, a holding member for holding the steam-pressurized concrete block installed on the movable end of the manual jack, two sets of symmetrically arranged hook springs suspended between the movable end of the manual jack and the top seat, vertical cylinders connected to the frame on both sides of the manual jack, two limiting heads with an outer diameter smaller than the inner diameter of the vertical cylinder slidably installed inside the vertical cylinder, a bent rod installed on the opposite side of each of the two limiting heads in one vertical cylinder, a ring installed at the end of the bent rod away from the limiting head, two corresponding rings of one vertical cylinder respectively sleeved on both ends of the hook springs, and a cylinder cap threadedly connected to both ends of the vertical cylinder, the cylinder cap sleeved on the bent rod.

[0006] Furthermore, two horizontal plates are symmetrically installed on the surface of the frame by screws, and a support plate is installed at the middle position of the opposite surface of the two horizontal plates. The end of the support plate away from the horizontal plate is connected and fixed to the vertical cylinder.

[0007] Furthermore, the holding member includes a movable beam, the movable beam is installed on the movable end of the manual jack, and a pressure head for holding steam-pressurized concrete blocks is installed at the middle position of the lower surface of the movable beam by screws.

[0008] Furthermore, guide plates are provided at both ends of the movable beam, and the guide plates are fixedly connected to the frame. Vertical dovetail grooves are provided on the opposite surfaces of the two guide plates. Dovetail blocks are installed at both ends of the movable beam, and the dovetail blocks are slidably installed in the dovetail grooves.

[0009] Furthermore, a reinforcing plate is installed at the upper end of the guide plate, and both ends of the reinforcing plate are connected and fixed to the frame.

[0010] Furthermore, a column head is installed at the middle of the two parallel sides of the top seat, and a positioning ring is fitted on the movable end of the manual jack and fixed to the movable end of the manual jack. Two L-shaped rod heads are symmetrically installed on the outer surface of the positioning ring, and the hook parts at both ends of the hook spring are respectively hooked to the column head and the L-shaped rod head.

[0011] Furthermore, a slag discharge port is provided at the center of the upper surface of the support, and the bottom of the frame is open.

[0012] The beneficial effects of this utility model are:

[0013] Vertical cylinders are installed on both sides of the manual jack. Limiting heads inside the cylinders are connected to bent rods, and rings on the bent rods are fitted around both ends of the hook spring. Even if the hook at the end of the hook spring detaches due to fatigue, the hook spring will be confined within the rings, preventing it from scattering and avoiding injury to operators and equipment, thus reducing safety risks. Simultaneously, when the hook spring stretches or contracts, the limiting heads slide within the vertical cylinders, ensuring that the rings and other components do not affect the normal operation of the hook spring. Attached Figure Description

[0014] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0015] Figure 1 This is a schematic diagram of the structure of a steam-pressurized concrete block strength testing device according to the present invention;

[0016] Figure 2 This is a schematic diagram of the assembly of the limiting head, bent rod, circular ring and hook spring in the steam-pressurized concrete block strength testing device of this utility model;

[0017] Figure 3 This is a schematic diagram of the assembly of the horizontal plate, support plate and vertical cylinder in a steam-pressurized concrete block strength testing device of this utility model;

[0018] Figure 4 This is a schematic diagram of the assembly of the pressure head and the moving beam in the steam-pressurized concrete block strength testing device of this utility model;

[0019] In the diagram: 1-Frame, 2-Support, 3-Pressure head, 4-Slag discharge port, 5-Guide plate, 6-Dovetail tenon, 7-Vertical cylinder, 8-Horizontal plate, 9-Support plate, 10-Cylinder cover, 11-Bent rod, 12-Ring, 13-Top seat, 14-Pressure gauge, 15-Hook spring, 16-Moving beam, 17-Positioning ring, 18-Limiting head, 19-L-shaped rod head, 20-Dovetail tenon block, 21-Manual jack. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] Please see Figure 1 and Figure 4This utility model provides a technical solution: a steam-pressurized concrete block strength testing device, including a frame 1, a support 2 installed at the lower part of the frame 1, a top seat 13 installed at the top of the frame 1, an inverted manual jack 21 installed on the top seat 13, a pressure gauge 14 installed on the cylinder of the manual jack 21, a moving beam 16 installed on the movable end of the manual jack 21, and a pressure head 3 for pressing the steam-pressurized concrete block is installed at the middle of the lower surface of the moving beam 16 by screws. The steam-pressurized concrete block to be tested is placed on the support 2, and its position is adjusted so that the center of the steam-pressurized concrete block is as aligned as possible with the center of the pressure head 3. The manual jack 21 is operated so that its movable end slowly presses down, driving the pressure head 3 to apply pressure. During the loading process, the loading speed is controlled to rise evenly by observing the pressure gauge 14 until the steam-pressurized concrete block is destroyed. The maximum load value displayed on the pressure gauge 14 when the steam-pressurized concrete block is destroyed is recorded, and the pressure-bearing area of ​​the specimen is measured and recorded. Calculate the compressive strength of autoclaved aerated concrete blocks according to the formula for calculating compressive strength.

[0022] See Figure 1 and Figure 4 The movable beam 16 has guide plates 5 at both ends, which are fixedly connected to the frame 1. Vertically arranged dovetail grooves 6 are provided on the opposite surfaces of the two guide plates 5. Dovetail blocks 20 are installed at both ends of the movable beam 16, slidingly installed within the dovetail grooves 6. The dovetail blocks 20 at both ends of the movable beam 16 engage with the dovetail grooves 6 on the guide plates 5, ensuring that when the manual jack 21 drives the pressure head 3 downwards, the movable beam 16 can only move vertically and stably, guaranteeing that the pressure head 3 acts perpendicularly on the autoclaved aerated concrete blocks. This avoids deviations in test results due to offset, improving the accuracy and reliability of the test data. A reinforcing plate is installed on the upper end of the guide plate 5, with both ends fixedly connected to the frame 1. The reinforcing plate improves the stability of the guide plate 5 installation. A slag discharge port 4 is provided in the middle of the upper surface of the support 2. The bottom of the frame 1 is open, and the slag discharge port 4 is provided on the support 2. The residue generated by the crushing of the autoclaved aerated concrete blocks during testing can be discharged through the slag discharge port 4.

[0023] See Figures 1-4Two sets of symmetrically arranged hook springs 15 are suspended between the movable end of the manual jack 21 and the top seat 13. A column head is installed at the center of each of the two parallel sides of the top seat 13. A positioning ring 17 is fitted onto the movable end of the manual jack 21 and is fixed thereto. Two L-shaped rod heads 19 are symmetrically installed on the outer surface of the positioning ring 17. The hooks at both ends of the hook springs 15 are respectively hooked to the column head and the L-shaped rod head 19. Vertical cylinders 7 are provided on both sides of the manual jack 21 and connected to the frame 1. The surface of the frame 1 is secured by screws. The device is equipped with two horizontal plates 8, each with a support plate 9 installed at the midpoint of its opposite face. The end of the support plate 9 furthest from the horizontal plate 8 is connected and fixed to a vertical cylinder 7. Two limiting heads 18, with outer diameters smaller than the inner diameter of the vertical cylinder 7, are slidably installed inside the vertical cylinder 7. Bent rods 11 are installed on opposite sides of each limiting head 18 within one vertical cylinder 7. A ring 12 is installed at the end of each bent rod 11 furthest from the limiting head 18. The two corresponding rings 12 of one vertical cylinder 7 are respectively fitted onto the ends of a hook spring 15. Both ends of the vertical cylinder 7 are threadedly connected to cylinder caps 10, which are fitted onto the bent rods 11. Vertical cylinders 7 are installed on both sides of the manual jack 21. Limiting heads 18 are installed inside the vertical cylinder 7, connected to the bent rods 11. Rings 12 are installed at the ends of the bent rods 11, their positions carefully designed to fit precisely onto the ends of the hook springs 15. This design provides a significant safety guarantee. After prolonged use, the hook at the end of the hook spring 15 is prone to fatigue and detach from the connection. In the past, this would cause the hook spring 15 to scatter under the force of its elasticity, posing a serious threat to the personal safety of operators and surrounding equipment. However, in this device, even if the hook detaches, the hook spring 15 is firmly contained within the ring 12 and cannot be ejected at will, greatly reducing the safety risk and providing reliable protection for operators and equipment.

[0024] Furthermore, during the operation of the detection device, the hook spring 15 will stretch or contract according to the working state of the manual jack 21. At this time, the limiting head 18 connected to the bending rod 11 will slide smoothly within the vertical cylinder 7. This sliding design is ingenious; it ensures that when the hook spring 15 extends or retracts, the ring 12 and other connected components will not obstruct the normal operation of the hook spring 15, allowing it to freely exert its elastic effect, while also continuously maintaining the constraint on the hook spring 15 to ensure that the safety protection function is always effective.

[0025] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for detecting the strength of a steam-cured concrete block, comprising a frame (1), characterized in that: A support (2) is installed at the lower part of the frame (1), and a top seat (13) is installed at the top of the frame (1). An inverted manual jack (21) is installed on the top seat (13). A pressure gauge (14) is installed on the cylinder of the manual jack (21). A clamping device for holding steam-pressurized concrete blocks is installed on the movable end of the manual jack (21). Two sets of symmetrically arranged hook springs (15) are suspended between the movable end of the manual jack (21) and the top seat (13). Both sides of the manual jack (21) are equipped with hook springs that connect to the frame. (1) Connected vertical cylinders (7) have two limiting heads (18) with outer diameters smaller than the inner diameter of the vertical cylinder (7) that are slidably installed inside the vertical cylinder (7). The two limiting heads (18) inside the vertical cylinder (7) are each equipped with a bent rod (11) on opposite sides. A ring (12) is installed at the end of the bent rod (11) away from the limiting head (18). The two rings (12) corresponding to the vertical cylinder (7) are respectively sleeved on both ends of the hook spring (15). Both ends of the vertical cylinder (7) are threaded with a cylinder cover (10), and the cylinder cover (10) is sleeved on the bent rod (11).

2. A device for testing the strength of a steam-cured concrete block according to claim 1, characterized in that: The frame (1) has two horizontal plates (8) symmetrically installed on its surface by screws. Each horizontal plate (8) has a support plate (9) installed at the middle of its opposite side. The end of the support plate (9) away from the horizontal plate (8) is connected and fixed to the vertical cylinder (7).

3. A device for testing the strength of a steam-cured concrete block according to claim 1, characterized in that: The holding component includes a movable beam (16), the movable beam (16) is installed on the movable end of the manual jack (21), and a pressure head (3) for holding steam-pressurized concrete blocks is installed at the middle position of the lower surface of the movable beam (16) by screws.

4. A device for testing the strength of a vapour pressurised concrete block according to claim 3, characterised in that: The movable beam (16) is provided with guide plates (5) at both ends. The guide plates (5) are connected and fixed to the frame (1). The two guide plates (5) are provided with vertically arranged dovetail grooves (6) on their opposite sides. The movable beam (16) is provided with dovetail blocks (20) at both ends. The dovetail blocks (20) are slidably installed in the dovetail grooves (6).

5. A device for testing the strength of a vapour pressurised concrete block according to claim 4, characterised in that: A reinforcing plate is installed on the upper end of the guide plate (5), and both ends of the reinforcing plate are connected and fixed to the frame (1).

6. A device for testing the strength of a steam-cured concrete block according to claim 1, characterized in that: The top seat (13) has a column head installed at the middle of the two parallel sides. The movable end of the manual jack (21) is fitted with a positioning ring (17) that is connected and fixed to the movable end of the manual jack (21). Two L-shaped rod heads (19) are symmetrically installed on the outer surface of the positioning ring (17). The hook parts at both ends of the hook spring (15) are respectively hooked to the column head and the L-shaped rod head (19).

7. A device for testing the strength of a steam-cured concrete block according to claim 1, characterized in that: The support (2) has a slag discharge port (4) in the middle of its upper surface, and the bottom of the frame (1) is open.

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