Road subgrade pavement deflection detection equipment

Abstract

The utility model discloses highway subgrade pavement deflection detection equipment which comprises a front lever, a rear lever, a base, a measuring point screw and a measuring head, one end of the front lever is connected with the rear lever in an inserted mode, the rear lever is connected with the base through a screw rod, the measuring head is arranged below the outer end of the front lever, the measuring point screw is arranged above the outer end of the rear lever, and the measuring point screw is connected with the measuring head. An inserting plate is fixed to the connecting end of the front lever, first racks are arranged on the two faces of the inserting plate, an inserting groove is formed in the connecting end of the rear lever, inner grooves are further formed in the two sides of the interior of the inserting groove, extrusion plates are arranged in the inner grooves, second racks are further fixed to the inner faces of the extrusion plates, and four drawable positioning rods are inserted into the two sides of the connecting end of the rear lever. The two sides of the connecting end of the rear lever are further in threaded connection with locking bolts. According to the highway subgrade pavement deflection detection equipment, a connecting structure of an existing Beckmann deflectometer is optimized and improved, so that the Beckmann deflectometer can be quickly, conveniently and firmly connected, time and labor are saved during use, and the practicability is improved.

Description

Technical Field

[0001] The utility model relates to the field of roadbed and pavement detection equipment, in particular to highway roadbed and pavement deflection detection equipment. Background Art

[0002] Deflection generally refers to the total vertical deformation value (total deflection) or vertical rebound deformation value (rebound deflection) of the roadbed or pavement surface at the wheel gap position under the load of a specified standard vehicle. Deflection is one of the important technical indicators for highway design and highway engineering quality evaluation. It reflects the overall strength of all layers of the pavement. The strength of the roadbed is generally reflected by the rebound modulus. We usually use Beckmann deflection meter for detection. The traditional Beckmann deflection meter has four bolts connecting the front lever and the rear lever. The four bolts must be disassembled during disassembly and assembly. This connection method is time-consuming and labor-intensive during disassembly and assembly, and is not convenient enough.

[0003] In order to solve the above problems, we proposed a highway roadbed and pavement deflection detection equipment to improve the shortcomings of the existing technology. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a highway roadbed and pavement deflection detection device. In order to solve the above technical problems, the utility model provides the following technical solutions:

[0005] The utility model highway roadbed and pavement deflection detection equipment comprises a front lever, a rear lever, a base, a measuring point screw and a probe, one end of the front lever is inserted and connected with the rear lever, the rear lever is connected with the base through a screw, a probe is arranged below the outer end of the front lever, a measuring point screw is arranged above the outer end of the rear lever, a plug-in board is fixed to the connecting end of the front lever, a rack 1 is arranged on both sides of the plug-in board, a slot is provided at the connecting end of the rear lever, inner slots are also provided on both sides of the slot, an extrusion plate is arranged in the inner slot, a rack 2 is also fixed to the inner surface of the extrusion plate, four drawable positioning rods are inserted at both sides of the connecting end of the rear lever, and the inner ends of the positioning rods are fixed at the four corners of the extrusion plate, locking bolts are also threadedly connected to both sides of the connecting end of the rear lever, and a reset spring is also sleeved on the positioning rod.

[0006] Preferably, the inner end of the locking bolt is against the center of the extrusion plate.

[0007] Preferably, the extrusion plate and the second rack are located in the inner grooves of the corresponding sides.

[0008] Preferably, the inner end of the return spring is fixed on the extrusion plate, and the outer end of the return spring is fixed on the inner wall of the inner groove.

[0009] Preferably, the plug board can be seamlessly inserted into the slot, and the second rack can mesh with the first rack.

[0010] Preferably, grooves are provided on both sides of the plug board, and the rack is fixed on the inner wall of the groove.

[0011] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0012] A plug-in plate is provided at the connecting end of the front lever, and recessed racks 1 are provided on both sides of the plug-in plate, a slot is opened at the connecting end of the rear lever, inner grooves are opened on both sides of the inner end of the slot, and a movable extrusion plate is provided in the inner groove, and a rack 2 that can mesh with the rack 1 is provided on the inner surface of the extrusion plate, and the extrusion plate is pushed and moved by a locking bolt. When assembling the device, it is only necessary to insert the plug-in plate of the front lever into the slot of the rear lever, and rotate the locking bolt inward to allow the rack 2 to firmly clamp the rack 1, so that the front lever and the rear lever can be quickly and firmly connected and fixed. When disassembling, it is only necessary to rotate the locking bolt outward to allow the rack 2 to automatically disengage from the rack 1, thereby pulling the plug-in plate of the front lever out of the slot of the rear lever. The highway roadbed and pavement deflection detection device using this structure optimizes and improves the connection structure of the existing Beckman deflection instrument, so that it can be quickly, conveniently and firmly connected, saving time and effort in use, thereby improving practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the structure of the utility model after disassembly;

[0016] Figure 3 It is a schematic structural diagram of the sectioned connecting end of the rear lever in the utility model;

[0017] Figure 4 It is a three-dimensional structural schematic diagram of the plug-in board in the utility model.

[0018] In the figure: 1. front lever; 2. rear lever; 3. base; 4. measuring point screw; 5. measuring head; 6. locking bolt; 7. plug-in board; 8. groove; 9. rack 1; 10. slot; 11. inner groove; 12. extrusion plate; 13. rack 2; 14. positioning rod; 15. reset spring. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. Example

[0020] like Figure 1-4 As shown, the roadbed and pavement deflection detection equipment comprises a front lever 1, a rear lever 2, a base 3, a measuring point screw 4 and a probe 5. One end of the front lever 1 is plugged and connected with the rear lever 2, and the rear lever 2 is connected with the base 3 through a screw rod. The probe 5 is arranged below the outer end of the front lever 1, and the measuring point screw 4 is arranged above the outer end of the rear lever 2 to form an integral Beckmann deflection instrument structure. The connecting end of the front lever 1 is fixed with a plug-in board 7, and racks 9 are arranged on both sides of the plug-in board 7. The connecting end of the rear lever 2 is provided with a plug-in board 7. There is a slot 10, and inner grooves 11 are opened on both sides of the slot 10. An extrusion plate 12 is arranged in the inner groove 11, and a rack 13 is fixed to the inner surface of the extrusion plate 12. Four movable positioning rods 14 are inserted on both sides of the connecting end of the rear lever 2, and the inner ends of the positioning rods 14 are fixed at the four corners of the extrusion plate 12. Locking bolts 6 are also threadedly connected on both sides of the connecting end of the rear lever 2. A return spring 15 is also sleeved on the positioning rod 14, which can be quickly, conveniently and firmly connected, saving time and effort in use.

[0021] In this embodiment, the inner end of the locking bolt 6 presses against the center of the extrusion plate 12 , which is conducive to moving inward against the extrusion plate 12 .

[0022] In this embodiment, the extrusion plate 12 and the second rack 13 are located in the inner groove 11 on the corresponding side, so as to prevent the second rack 13 from contacting the plug board 7 when the plug board 7 is inserted or pulled out, and facilitate the plug board 7 to be easily pulled out.

[0023] In this embodiment, the inner end of the return spring 15 is fixed to the extrusion plate 12, and the outer end of the return spring 15 is fixed to the inner wall of the inner groove 11, ensuring that the return spring 15 can pull the extrusion plate 12 back into the inner groove 11 for return.

[0024] In this embodiment, the plug-in board 7 can be seamlessly inserted into the slot 10, and the rack 2 13 can mesh with the rack 1 9, ensuring that the plug-in board 7 and the rear lever 2 are tightly and firmly connected.

[0025] In this embodiment, grooves 8 are further provided on both sides of the plug board 7, and a rack 9 is fixed on the inner wall of the groove 8, which is conducive to seamless insertion of the plug board 7 into the slot 10.

[0026] Principles and advantages of the utility model: When using the highway roadbed and pavement deflection detection equipment, the front lever 1 and the rear lever 2 are carried to the detection site, the rear lever 2 is placed on the ground, the plug-in plate 7 at the end of the front lever 1 is inserted into the groove 8 at the end of the rear lever 2, and then the locking bolt 6 is rotated inwards, the extrusion plate 12 is pressed inwards, the positioning rod 14 moves inwards, the return spring 15 is stretched, and the rack 2 13 on the inner side is meshed and pressed tightly against the rack 1 9, and then the locking bolt 6 on the other side is rotated inwards, and the rack 2 13 on the other side is meshed and pressed tightly against the rack 1 9, so as to assemble the equipment. , and then use it with a dial indicator to detect the deflection of the highway roadbed and pavement. When disassembling the detection equipment, rotate the two locking bolts 6 outward to disengage the rack 2 13 from the rack 1 9, move the positioning rod 14 outward, and contract the reset spring 15 to pull the rack 2 13 into the inner groove 11. Then, pull the plug-in plate 7 at the end of the front lever 1 out of the slot 10 to disassemble the equipment. This highway roadbed and pavement deflection detection equipment optimizes and improves the connection structure of the existing Beckmann deflection instrument so that it can be quickly, conveniently and firmly connected, saving time and effort in use, thereby improving practicality.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A roadbed and pavement deflection detection device, comprising a front lever (1), a rear lever (2), a base (3), a measuring point screw (4) and a probe (5), wherein one end of the front lever (1) is plugged and connected to the rear lever (2), the rear lever (2) is connected to the base (3) via a screw, the probe (5) is arranged below the outer end of the front lever (1), and the measuring point screw (4) is arranged above the outer end of the rear lever (2), characterized in that: A plug-in board (7) is fixed to the connecting end of the front lever (1), and racks (9) are arranged on both sides of the plug-in board (7). A slot (10) is provided at the connecting end of the rear lever (2), and inner grooves (11) are provided on both sides of the slot (10). An extrusion plate (12) is arranged in the inner groove (11), and racks (13) are fixed to the inner surface of the extrusion plate (12). Four movable positioning rods (14) are inserted on both sides of the connecting end of the rear lever (2), and the inner ends of the positioning rods (14) are fixed at the four corners of the extrusion plate (12). Locking bolts (6) are threadedly connected to the connecting end of the rear lever (2), and a return spring (15) is sleeved on the positioning rod (14).

2. The highway roadbed and pavement deflection detection device according to claim 1, characterized in that: The inner end of the locking bolt (6) is pressed against the center of the extrusion plate (12).

3. The highway roadbed and pavement deflection detection device according to claim 1, characterized in that: The extrusion plate (12) and the second rack (13) are located in the inner groove (11) on the corresponding side.

4. The highway roadbed and pavement deflection detection device according to claim 1, characterized in that: The inner end of the return spring (15) is fixed on the extrusion plate (12), and the outer end of the return spring (15) is fixed on the inner wall of the inner groove (11).

5. The highway subgrade and pavement deflection detection device according to claim 1, characterized in that: The plug board (7) can be seamlessly inserted into the slot (10), and the second rack (13) can mesh with the first rack (9).

6. The highway subgrade and pavement deflection detection device according to claim 5, characterized in that: Grooves (8) are also provided on both sides of the plug board (7), and the rack 1 (9) is fixed on the inner wall of the groove (8).

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