Asphalt concrete core sample lossless clamping device

Abstract

The utility model provides an asphalt concrete core sample lossless clamping device which comprises a booster pump, a connecting shaft is arranged at the bottom end of the booster pump, the bottom end of the connecting shaft is connected with a core taking box, and handles are arranged at the two ends of the booster pump. Through precise pressure control, a nondestructive clamping structure, standardized adaptation, man-machine interaction optimization and durability design, the clamping stability, safety and detection accuracy of the asphalt concrete core sample are remarkably improved, and the clamping device is suitable for scenes such as road engineering detection and laboratory research and particularly meets the high-precision nondestructive detection requirement.

Description

Technical Field

[0001] This utility model relates to the field of building testing equipment technology, specifically to a non-destructive clamping device for asphalt concrete core samples. Background Technology

[0002] In the construction project quality acceptance system, concrete material performance testing is a core component to ensure structural safety.

[0003] Prior art document CN104502145B discloses a concrete core sample extractor, which is protected by the following specifications: "It includes a left operating handle, a right operating handle, a rotating shaft, and a clamping mechanism. The left and right operating handles are connected by a rotating shaft. The clamping mechanism is located at the lower part of the left and right operating handles. The clamping mechanism includes a movable clamping body and a fixed clamping body. The movable clamping body is connected to the lower part of the left operating handle via a connecting device, and the fixed clamping body is connected to the lower part of the right operating handle. A support plate is provided at the lower part of the movable clamping body. The thickness of the movable clamping body and the fixed clamping body is smaller than the gap between the concrete core sample and the concrete foundation." However, during the clamping process, the contact surface is a hard, rigid material, which easily damages the core sample and causes significant errors in subsequent test results. Moreover, this structure requires the operator to control the force during clamping, which is inconvenient and easily damages the core sample during the process.

[0004] Therefore, there is an urgent need for a non-destructive clamping device for asphalt concrete core samples to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a non-destructive clamping device for asphalt concrete core samples to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a non-destructive clamping device for asphalt concrete core samples, including a booster pump, a connecting shaft at the bottom of the booster pump, the bottom of the connecting shaft being connected to the core sampling box, and handles at both ends of the booster pump.

[0007] Preferably, the connecting shaft is a hollow tubular structure, with its top end connected to the output end of the booster pump and its bottom end connected to the top end of the core sampling box.

[0008] Preferably, the core sampling box has a cylindrical structure, the inner diameter of the core sampling box is adapted to the diameter of the standard core sample, the bottom of the core sampling box is open, the top of the core sampling box is closed, and the center of the top wall of the core sampling box is connected to the connecting shaft.

[0009] Preferably, the core retrieval box has a closed cavity inside its side wall, the inner cavity of the connecting shaft communicates with the closed cavity, and the inner wall of the core retrieval box is made of a high-strength, elastic, and wear-resistant material.

[0010] Preferably, the inner wall of the enclosed cavity is provided with multiple suction cups, and the suction cups and the inner wall of the enclosed cavity are integrally formed.

[0011] Preferably, the suction cup has a trumpet-shaped disc head structure, and the connection between the suction cup and the enclosed cavity is a closed connection.

[0012] Preferably, the outer end of the top wall of the core extraction box is provided with a flat pressure hole, which communicates with the closed cavity.

[0013] Preferably, the pressure-relieving hole is a hollow tubular structure, and a plug is provided at the opening of the pressure-relieving hole.

[0014] Preferably, the lower end of the handle is provided with a soft, non-slip pad for easy gripping.

[0015] Preferably, the booster pump is an electronic booster pump, and the booster pump is provided with an on / off button on the top and a pressure gauge on the side.

[0016] The present invention has the following beneficial effects:

[0017] 1. This utility model achieves dynamic pressure control through an electronic booster pump and a pressure gauge, which can accurately adapt to the strength requirements of different core samples and avoid the overload or unstable clamping problems caused by traditional mechanical pressure.

[0018] 2. This utility model uses high-strength, elastic, and wear-resistant materials, which can not only fit tightly to the surface of the core sample to avoid slippage, but also reduce friction damage, making it especially suitable for brittle asphalt concrete;

[0019] 3. The suction cup design in this utility model disperses the clamping force evenly through negative pressure, increases the contact area, and avoids local stress concentration that could lead to core sample cracking or deformation. Attached Figure Description

[0020] Figure 1 This is a front perspective view of the present invention;

[0021] Figure 2 This is a cross-sectional view of the present invention. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0023] See Figures 1 to 2A non-destructive clamping device for asphalt concrete core samples includes a booster pump 1, a connecting shaft 2 at the bottom of the booster pump 1, and a core sampling box 3 at the bottom of the connecting shaft 2. The booster pump 1 has handles 4 at both ends. Based on a pressure adsorption and structural synergistic design, the pressure inside the closed cavity is dynamically controlled by the electronic booster pump 1, causing the inner wall of the core sampling box to push the suction cup 5 to adhere to the side wall of the core sample. Since both the inner wall and the suction cup 5 are made of flexible elastic materials, local compression damage can be avoided. The flared design of the suction cup increases the contact area, and combined with the standardized inner diameter of the core sampling box, ensures uniform force on the core sample. The device monitors the pressure in real time through a pressure gauge 10, and the ergonomic handles 4 ensure stable operation, achieving efficient clamping of the core sample with integrity and without damage.

[0024] Preferably, the connecting shaft 2 is a hollow tubular structure, with its top end connected to the output end of the booster pump 1 and its bottom end connected to the top end of the core retrieval box 3. The booster pump 1 transmits air pressure through the inner cavity of the connecting shaft 2 to the closed cavity 6 of the core retrieval box 3.

[0025] Preferably, the core sampling box 3 has a cylindrical structure, the inner diameter of the core sampling box 3 is adapted to the diameter of the standard core sample, the bottom of the core sampling box 3 is open, the top of the core sampling box 3 is closed, and the center of the top wall of the core sampling box 3 is connected to the connecting shaft 2. The inner cavity of the core sampling box 3 is adapted to the size of the standard asphalt concrete undisturbed core sample, which can ensure that the equipment can smoothly fit the core sample body.

[0026] Preferably, the core sampling box 3 has a closed cavity 6 inside its side wall, and the inner cavity of the connecting shaft 2 communicates with the closed cavity 6. The inner wall of the core sampling box 3 is made of a high-strength, elastic, and wear-resistant material. The high-strength, elastic, and wear-resistant material can be polyurethane or composite rubber. This ensures the degree of deformation and expansion of the inner wall during pressurization, achieving a self-adaptive effect to a certain extent, guaranteeing the stability of the concrete core sample and ensuring the strength of the inner wall. During sampling, the inner wall provides sufficient support, further ensuring the stability of the clamping.

[0027] Preferably, the inner wall of the enclosed cavity 6 is provided with multiple suction cups 5, and the suction cups 5 are integrally formed with the inner wall of the enclosed cavity 6. Under the pushing action of the inner wall, the suction cups 5 approach the side wall of the core sample. After the air in the suction cups 5 is squeezed out, a vacuum is formed, and the negative pressure adsorbs onto the side wall of the core sample, further ensuring the clamping force. Moreover, the suction cups are made of flexible material and will not damage the asphalt concrete core sample.

[0028] Preferably, the suction cup 5 has a trumpet-shaped head structure, and the connection between the suction cup 5 and the closed cavity 6 is a closed connection. The rear wall of the suction cup 5 is a closed design, which can ensure that the suction cup 5 forms a negative pressure state after it is attached to the side wall of the core sample, thus ensuring the adhesion of the suction cup 5.

[0029] Preferably, the outer end of the top wall of the core extraction box 3 is provided with a flat pressure hole 7, which communicates with the closed cavity 6. After the clamping operation is completed, the plug of the flat pressure hole 7 is opened to release the pressure, and the inner wall drives the suction cup to return to its original position, thus completing the release of the clamping state.

[0030] Preferably, the flat pressure hole 7 is a hollow tubular structure, and a plug 8 is provided at the opening of the flat pressure hole 7.

[0031] Preferably, the lower end of the handle 4 is provided with a soft, non-slip pad for easy gripping. This provides a good point of leverage for the operator when operating the mobile device.

[0032] Preferably, the booster pump 1 is an electronic booster pump, with an on / off button 9 on its top and a pressure gauge 10 on its side. The booster pump 1 can be a rechargeable electronic booster pump. The start and stop of the booster pump 1 are controlled by the on / off button 9, and the internal air pressure is observed through the pressure gauge, thereby controlling the start and stop of the booster pump and providing great convenience for operators to judge the work progress.

[0033] The working principle of this embodiment is as follows:

[0034] When using this utility model, pressurization is initiated: pressurization is achieved through the booster pump 1, and the pressure is transmitted to the closed cavity 6 of the core extraction box 3 via the hollow connecting shaft 2;

[0035] Under the pressure, the inner wall of the core box 3 expands due to the increased internal pressure, thereby pushing the suction cup 5 close to the side wall of the asphalt concrete core sample. Through the squeezing action, the suction cup 5 is adsorbed on the surface of the core sample to prevent slippage.

[0036] After confirming that the clamping is stable by observing the pressure gauge 10, lift the device to take out the core sample and move it to the designated position. Then open the plug 8 of the flat pressure hole 7 to release the pressure of the closed cavity 6. The inner wall retracts, causing the suction cup to retract, releasing the adsorption and safely taking out the core sample.

[0037] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A non-destructive clamping device for asphalt concrete core samples, characterized in that: It includes a booster pump (1), the bottom end of which is provided with a connecting shaft (2), the bottom end of which is connected to the core scavenging box (3), and the two ends of the booster pump (1) are provided with handles (4). The core sampling box (3) has a closed cavity (6) inside its side wall. The inner cavity of the connecting shaft (2) communicates with the closed cavity (6). The inner wall of the core sampling box (3) is made of high-strength, elastic, and wear-resistant material. The inner wall of the closed cavity (6) is provided with multiple suction cups (5), and the suction cups (5) and the inner wall of the closed cavity (6) are integrally formed. The suction cup (5) has a trumpet-shaped head structure, and the connection between the suction cup (5) and the closed cavity (6) is a closed connection.

2. The asphalt concrete core sample non-destructive clamping device according to claim 1, characterized in that: The connecting shaft (2) is a hollow tubular structure. The top end of the connecting shaft (2) is connected to the output end of the booster pump (1), and the bottom end of the connecting shaft (2) is connected to the top end of the core retrieval box (3).

3. The asphalt concrete core sample non-destructive clamping device according to claim 1, characterized in that: The core-taking box (3) is a cylindrical structure. The inner diameter of the core-taking box (3) is adapted to the diameter of the standard core sample. The bottom of the core-taking box (3) is open, and the top of the core-taking box (3) is closed. The center of the top wall of the core-taking box (3) is connected to the connecting shaft (2).

4. The asphalt concrete core sample non-destructive clamping device according to claim 1, characterized in that: The outer end of the top wall of the core extraction box (3) is provided with a flat pressure hole (7), which is connected to the closed cavity (6).

5. The asphalt concrete core sample non-destructive clamping device according to claim 4, characterized in that: The flat pressure hole (7) is a hollow tubular structure, and a plug (8) is provided at the opening of the flat pressure hole (7).

6. The asphalt concrete core sample non-destructive clamping device according to claim 1, characterized in that: The lower end of the handle (4) is provided with a soft, non-slip pad for easy gripping.

7. The asphalt concrete core sample non-destructive clamping device according to claim 1, characterized in that: The booster pump (1) is an electronic booster pump. The booster pump (1) has an on / off button (9) on its top and a pressure gauge (10) on its side.

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