Pavement material strength testing device

Abstract

The utility model discloses a pavement material strength testing device which comprises a supporting seat, a bearing disc, a supporting frame, a hydraulic cylinder, a pressure sensor and a testing disc, a protective barrel is vertically connected to the supporting seat in a sliding mode, the bearing disc is located on the inner side of the protective barrel, and the testing disc can enter the protective barrel. An elastic piece is arranged between the supporting seat and the protective cylinder and is used for pushing the protective cylinder to move upwards and enabling the top of the protective cylinder to be higher than a test material. Compared with the prior art, the protective device has the following advantages and effects that the protective cylinder is used for shielding and protecting a test material, so that the risk of splashing of chippings is reduced, the personal safety of workers is ensured, and meanwhile, the subsequent cleaning operation of the chippings can be facilitated.

Description

Technical Field

[0001] The utility model relates to the field of material testing, and particularly relates to a device for testing the strength of pavement materials. Background Art

[0002] A device for testing the strength of pavement materials is a device for detecting the strength indexes of pavement materials, and can perform tests such as compressive strength, flexural strength, splitting, and Marshall stability on materials such as concrete and asphalt mixtures.

[0003] The device for testing the strength of pavement materials in the related art generally includes a support base, a receiving tray fixedly connected to the support base, a support frame fixedly connected to the support base, a hydraulic cylinder arranged on the support frame, a piston end of the hydraulic cylinder is connected to a test tray through a pressure sensor, and the test tray is located directly above the receiving tray. The test material is placed at the middle position of the receiving tray, and the test tray is controlled to move downward through the hydraulic cylinder, and the test tray applies pressure to the test material, so as to realize the strength test.

[0004] However, after the test material is crushed under pressure, the debris splashes around, which is likely to cause injury to the staff. At the same time, the debris splashes on the ground, and the subsequent cleaning is rather troublesome, so it needs to be improved. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a device for testing the strength of pavement materials, which can realize the shielding and protection of the test material, reduce the risk of debris splashing, ensure the personal safety of the staff, and at the same time facilitate the subsequent cleaning operation of the debris.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions: A device for testing the strength of pavement materials, including a support base, a receiving tray, a support frame, a hydraulic cylinder, a pressure sensor and a test tray, a protective cylinder is vertically slidably connected to the support base, the receiving tray is located inside the protective cylinder, and the test tray can enter the protective cylinder, an elastic member is arranged between the support base and the protective cylinder, and the elastic member is used to push the protective cylinder upward and make the top of the protective cylinder higher than the test material.

[0007] The utility model can be further configured in a preferred example as: A plurality of guide rods are vertically and fixedly connected to the support base, the plurality of guide rods surround the receiving tray, and a plurality of guide grooves are formed at the bottom of the protective cylinder, and the plurality of guide rods are respectively in vertical sliding fit with the corresponding guide grooves.

[0008] In a preferred example, the present utility model can be further configured as follows: The elastic member includes a plurality of control springs, and the plurality of control springs are respectively located in the corresponding guide grooves. One end of each control spring is fixed to the top of the corresponding guide rod, and the other end is fixed to the bottom of the corresponding guide groove.

[0009] In a preferred example, the present utility model can be further configured as follows: A limit ring is fixedly connected to the bottom of the protective cylinder. When the protective cylinder moves upward and the limit ring abuts against the receiving tray, the top of the protective cylinder is higher than the test material.

[0010] In a preferred example, the present utility model can be further configured as follows: A support hole is provided at the upper end of the protective cylinder. A limit screw is threadedly connected in the support hole. A control handwheel is fixedly connected to the end of the limit screw. When the protective cylinder moves downward and the top of the protective cylinder is lower than the upper surface of the receiving tray, and the limit screw extends out of the support hole, the limit screw abuts against the lower surface of the receiving tray to limit the upward movement of the protective cylinder.

[0011] In a preferred example, the present utility model can be further configured as follows: An elastic scraping ring is fixedly connected to the side wall of the receiving tray along its circumference, and the scraping ring is in close contact with the inner side wall of the protective cylinder.

[0012] In a preferred example, the present utility model can be further configured as follows: Self-locking casters are respectively provided at the four corners of the bottom of the support base.

[0013] In summary, the present utility model has at least the following beneficial effects:

[0014] By using the protective cylinder to shield and protect the test material, the risk of debris splashing is reduced, ensuring the personal safety of the staff. At the same time, the protective cylinder can also reduce the risk of debris splashing on the ground, making the debris located inside the protective cylinder, which is convenient for subsequent cleaning of the debris. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the embodiment;

[0016] Figure 2 is a cross-sectional view of the embodiment;

[0017] Figure 3 is a cross-sectional view of components such as the receiving tray and the protective cylinder in the embodiment.

[0018] Reference numerals: 1, support base; 2, receiving tray; 3, support frame; 4, hydraulic cylinder; 5, pressure sensor; 6, test plate; 7, self-locking caster; 8, protective cylinder; 9, guide rod; 10, guide groove; 11, elastic member; 111, control spring; 12, limit ring; 13, support hole; 14, limit screw; 15, control handwheel; 16, scraping ring. Detailed implementation manners

[0019] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0020] Refer to Figure 1 , Figure 2 , a pavement material strength testing device, including a support base 1, a receiving tray 2 and a support frame 3 are fixedly connected to the support base 1, a hydraulic cylinder 4 is arranged on the support frame 3, the piston end of the hydraulic cylinder 4 is connected with a test plate 6 through a pressure sensor 5, and the test plate 6 is located directly above the receiving tray 2. At the same time, self-locking casters 7 are respectively arranged at the four corners of the bottom of the support base 1, so as to facilitate operations such as moving the testing device by the staff and improve the use convenience.

[0021] Refer to Figure 2 , Figure 3 , a protective cylinder 8 is arranged on the support base 1, a plurality of guide rods 9 are vertically and fixedly connected to the support base 1, the plurality of guide rods 9 are arranged around the receiving tray 2, a plurality of guide grooves 10 are formed at the bottom of the protective cylinder 8, and the plurality of guide rods 9 are respectively in vertical sliding fit with the corresponding guide grooves 10, so that the protective cylinder 8 can slide vertically.

[0022] Refer to Figure 2 , Figure 3 , the receiving tray 2 is located inside the protective cylinder 8, and the test plate 6 can enter the protective cylinder 8. An elastic member 11 is arranged between the support base 1 and the protective cylinder 8. The elastic member 11 is used to push the protective cylinder 8 upward and make the top of the protective cylinder 8 higher than the test material, so as to realize the shielding protection of the test material.

[0023] When strength testing is required, press down the protective cylinder 8, place the test material at the middle position of the receiving tray 2, and then release the protective cylinder 8. The protective cylinder 8 moves upward under the action of the elastic member 11, and makes the top of the protective cylinder 8 higher than the test material. Subsequently, control the test plate 6 to move downward through the hydraulic cylinder 4, so that the test plate 6 enters the protective cylinder 8 and applies pressure to the test material, and the strength testing can be realized.

[0024] Since the protective cylinder 8 can shield and protect the test material, reduce the risk of debris splashing, ensure the personal safety of the staff. At the same time, the protective cylinder 8 can also reduce the risk of debris splashing on the ground, so that the debris is located inside the protective cylinder 8, which is convenient for subsequent cleaning operations of the debris.

[0025] Reference Figure 2 and Figure 3 , the elastic member 11 includes a plurality of control springs 111. The plurality of control springs 111 are respectively located in the corresponding guide grooves 10. One end of each control spring 111 is fixed to the top of the corresponding guide rod 9, and the other end is fixed to the bottom of the corresponding guide groove 10, so that the plurality of control springs 111 can jointly push the protection cylinder 8 upward.

[0026] Reference Figure 2 and Figure 3 , a limit ring 12 is fixedly connected to the bottom of the protection cylinder 8. When the protection cylinder 8 moves upward and the limit ring 12 abuts against the receiving plate 2, the top of the protection cylinder 8 is higher than the test material, thereby realizing the limitation of the maximum vertical upward sliding stroke of the protection cylinder 8 and avoiding excessive movement of the protection cylinder 8.

[0027] Reference Figure 2 and Figure 3 , a support hole 13 is formed at the upper end of the protection cylinder 8. A limit screw 14 is threadedly connected in the support hole 13, and a control handwheel 15 is fixedly connected to the end of the limit screw 14. When the protection cylinder 8 moves downward and the top of the protection cylinder 8 is lower than the upper surface of the receiving plate 2, the support hole 13 is lower than the receiving plate 2. At this time, rotate the control handwheel 15 to drive the limit screw 14 to rotate. After the limit screw 14 extends out of the support hole 13, the limit screw 14 abuts against the lower surface of the receiving plate 2 to limit the upward movement of the protection cylinder 8, so as to facilitate the cleaning operation of the debris on the receiving plate 2 by the staff.

[0028] Reference Figure 2 and Figure 3 , an elastic scraping ring 16 is fixedly connected to the side wall of the receiving plate 2 along its circumference. The scraping ring 16 is in close contact with the inner side wall of the protection cylinder 8. When the protection cylinder 8 moves downward, the scraping ring 16 can scrape and clean the debris or dust on the inner side wall of the protection cylinder 8 to ensure the cleanliness of the protection cylinder 8.

[0029] The specific embodiments are only explanations of the present invention and do not limit the present invention. Those skilled in the art can make modifications without creative contributions to the embodiments according to needs after reading this specification, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A pavement material strength testing device, comprising a support base (1), a receiving tray (2), a support frame (3), a hydraulic cylinder (4), a pressure sensor (5), and a testing tray (6), characterized in that: A protective cylinder (8) is vertically slidably connected to the support base (1). The receiving tray (2) is located inside the protective cylinder (8), and the test tray (6) can enter the protective cylinder (8). An elastic member (11) is provided between the support base (1) and the protective cylinder (8). The elastic member (11) is used to push the protective cylinder (8) upward so that the top of the protective cylinder (8) is higher than the test material.

2. The strength testing device for pavement materials according to claim 1, characterized in that: A plurality of guide rods (9) are vertically and fixedly connected to the support base (1). The plurality of guide rods (9) are arranged around the periphery of the receiving tray (2). A plurality of guide grooves (10) are formed at the bottom of the protective cylinder (8). The plurality of guide rods (9) are respectively in vertical sliding fit with the corresponding guide grooves (10).

3. The pavement material strength testing device according to claim 2, wherein: The elastic member (11) includes a plurality of control springs (111). The plurality of control springs (111) are respectively located in the corresponding guide grooves (10). One end of the control spring (111) is fixed to the top of the corresponding guide rod (9), and the other end is fixed to the bottom of the corresponding guide groove (10).

4. The strength testing device for pavement materials according to claim 3, wherein: A limit ring (12) is fixedly connected to the bottom of the protective cylinder (8). When the protective cylinder (8) moves upward and the limit ring (12) abuts against the receiving tray (2), the top of the protective cylinder (8) is higher than the test material.

5. The strength testing device for road surface materials according to claim 3, characterized in that: A support hole (13) is formed at the upper end of the protective cylinder (8). A limit screw rod (14) is threadedly connected to the support hole (13). The end of the limit screw rod (14) is fixedly connected with a control handwheel (15). When the protective cylinder (8) moves downward so that the top of the protective cylinder (8) is lower than the upper surface of the receiving tray (2) and the limit screw rod (14) extends out of the support hole (13), the limit screw rod (14) abuts against the lower surface of the receiving tray (2) to limit the upward movement of the protective cylinder (8).

6. The strength testing device for road surface materials according to claim 1, wherein: An elastic scraping ring (16) is fixedly connected to the side wall of the receiving tray (2) along its circumference. The scraping ring (16) is in close contact with the inner side wall of the protective cylinder (8).

7. The pavement material strength testing device according to claim 1, characterized in that: Self-locking casters (7) are respectively arranged at the four corners of the bottom of the support base (1).

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