Pavement strength tester

Abstract

The utility model relates to the technical field of pavement strength detection, and particularly discloses a pavement strength tester which comprises a first detection beam, a second detection beam, a measuring device and a detection rod, the first detection beam is rotatably mounted on a base, and the first detection beam is detachably connected with the second detection beam; the measuring device comprises a lifting frame and a dial indicator, the lifting frame has the function of adjusting the height of the dial indicator, and when the deflection value of the road surface to be measured is measured, a detection contact of the dial indicator abuts against the detection rod; and the detection rod is inserted into the mounting sleeve in the mounting piece, penetrates through the mounting sleeve and is inserted into the groove in the first detection beam. According to the utility model, the detection rod is installed on the first detection beam through the installation member, the detection rod has higher stability and is not easy to shake, the installation member is provided with the knocking plate, the knocking power mechanism and other components, and whether the value of the dial indicator changes can be observed by knocking the first detection beam so as to judge whether the dial indicator is normal.

Description

Technical Field

[0001] The utility model belongs to the technical field of road strength detection, and in particular relates to a road strength tester. 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, with a unit of 0.01mm.

[0003] The deflection value reflects the overall stiffness of each layer of the road surface. The stiffness of the roadbed is generally reflected by the modulus of resilience. If the deflection value is too large, the deformation will be greater, and the road surface layers will be more likely to break. The reason for the deflection value being too large is generally related to the material properties, thickness, integrity (whether it is plated), compaction, etc. of each layer of the road surface, and is also related to climatic conditions. It will be larger in the rainy season.

[0004] Deflection value is an important part of road strength testing. At present, Beckmann beam is mostly used to test road deflection value. The following problems exist in the testing process:

[0005] 1. The detection rod that contacts the dial indicator detection contact is usually placed directly on the beam, which has poor stability and is prone to shaking relative to the beam, resulting in poor contact of the detection contact;

[0006] Second, the existing Beckman beam road strength test equipment does not have a dial indicator detection function, and it is unknown whether the dial indicator is damaged, resulting in inaccurate test data. Therefore, this application proposes a road strength tester. Utility Model Content

[0007] The purpose of the utility model is to provide a road surface strength tester to solve the problems raised by the above background technology.

[0008] To achieve the above purpose, the utility model provides the following technical solution, including a first detection beam, a second detection beam, a measuring device, and a detection rod, wherein the first detection beam is rotatably mounted on a base, and the first detection beam and the second detection beam are detachably connected;

[0009] The measuring device includes a lifting frame and a dial indicator. The lifting frame has the function of adjusting the height of the dial indicator. When measuring the deflection value of the road surface to be measured, the detection contact of the dial indicator is against the detection rod;

[0010] The detection rod is inserted into the mounting sleeve in the mounting piece, and the detection rod passes through the mounting sleeve and is inserted into the groove in the first detection beam. The mounting piece is provided with an insert plate, and the insert plate is plugged into the slot in the first detection beam.

[0011] The mounting member is provided with a fixing frame, a straight rod is fixedly installed on the fixing frame, the straight rod is inserted into the knocking plate, the knocking plate is fixedly connected to the knocking ball, a card slot for inserting the knocking plate is provided in the fixing frame, and the knocking plate cannot be moved up and down after being inserted into the card slot;

[0012] The knocking plate is connected to the knocking power mechanism. When the knocking plate is not inserted into the card slot, the knocking power mechanism is used to drive the knocking plate to knock the first detection beam up and down.

[0013] Preferably, four positioning members are inserted between the first detection beam and the second detection beam. The positioning members may be latches or bolts. The positioning members pass through the first detection beam and are inserted into the second detection beam.

[0014] Preferably, a mounting groove is provided on the second detection beam, and a temperature detector for measuring the road surface temperature in the area to be detected is installed in the mounting groove.

[0015] Preferably, a threaded structure is provided at the bottom of the detection rod, and the detection rod is connected to the mounting sleeve via threads.

[0016] Preferably, the striking power mechanism includes a T-shaped rod, which is inserted into the arc-shaped guide plate and can rotate along the inner wall of the arc-shaped guide plate. An arc-shaped groove is provided at the position of the fixed frame corresponding to the arc-shaped guide plate, and the center of the arc-shaped guide plate coincides with the center line of the straight rod.

[0017] Preferably, the T-shaped rod is fixedly connected to the lifting block, the lifting block is connected to the compression spring, the lifting block is slidably connected to the guide sleeve, and the guide sleeve is fixedly installed on the fixed frame.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. The utility model installs the detection rod on the first detection beam through the installation part. The detection rod has higher stability and is not easy to shake. The detection value is more accurate. The installation part and the first detection beam are easy to disassemble. The beam body of the first detection beam will not have a convex part when stored. The overall placement is more flat and not easy to deform.

[0020] Second, a knocking plate, a knocking power mechanism and other components are arranged on the mounting part, and by knocking on the first detection beam, it is possible to observe whether the value of the dial indicator changes, so as to judge whether the dial indicator is normal. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model.

[0022] Figure 2 It is a structural schematic diagram of the utility model.

[0023] Figure 3 This is a connection diagram between the mounting piece and the detection rod in the utility model.

[0024] Figure 4 It is a structural schematic diagram of the mounting member in the utility model.

[0025] Figure 5 It is a structural schematic diagram of the mounting member in the utility model.

[0026] Figure 6 It is a structural schematic diagram of the mounting member in the utility model.

[0027] In the figure: 1, first detection beam; 101, slot; 102, groove; 2, second detection beam; 3, base; 4, support rod; 5, temperature detector; 6, measuring device; 7, detection rod;

[0028] 8. Mounting parts; 801. Insert plate; 802. Mounting sleeve; 803. Fixing frame; 804. Striking plate; 805. Striking ball;

[0029] 807, striking power mechanism; 8071, T-shaped rod; 8072, arc-shaped guide plate; 8073, lifting block. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Reference Figure 1-Figure 6 A road strength tester includes a first detection beam 1, a second detection beam 2, a measuring device 6, and a detection rod 7. The first detection beam 1 is rotatably mounted on a base 3. Specifically, the base 3 has a height adjustment function. Specifically, a height adjustment mechanism is arranged at three legs on the base 3. The height of the legs is adjusted so that the base 3 can be stably placed on an uneven road surface. The first detection beam 1 and the second detection beam 2 are detachably connected. Specifically, four positioning members are inserted at the first detection beam 1 and the second detection beam 2. The positioning members can be pins or bolts. The positioning members pass through the first detection beam 1 and are inserted into the second detection beam 2.

[0032] During the inspection, the second inspection beam 2 is inserted into the gap between the wheels of the inspection vehicle (the inspection vehicle has at least two wheels on one side, and the second inspection beam 2 is inserted into the gap between the two wheels, and there is a gap between it and the wheels). In order to measure the temperature of the inspection position (near the position of the vehicle wheel), a mounting groove is provided on the second inspection beam 2, and a temperature detector 5 for the road surface temperature of the area to be inspected is installed in the mounting groove; the temperature measured by the temperature detector 5 is used as one of the data to be measured;

[0033] Furthermore, when measuring the deflection value of the road surface to be measured, the support rod 4 connected to the second detection beam 2 is against the ground, and it forms a lever structure with the first detection beam 1 and the base 3. The decline and rebound of the road surface at the support rod 4 will cause the first detection beam 1 to rise or fall at the position corresponding to the measuring device 6;

[0034] It should be noted that when the measuring device 6 measures the deflection value of the road surface to be measured, it is placed on the road surface. The measuring device 6 includes a lifting frame and a dial indicator. The lifting frame has the function of adjusting the height of the dial indicator. When measuring the deflection value of the road surface to be measured, the detection contact of the dial indicator is against the detection rod 7;

[0035] Further, in order to fix the position of the detection rod 7, the detection rod 7 is inserted into the mounting sleeve 802 in the mounting member 8, and the detection rod 7 passes through the mounting sleeve 802 and is inserted into the groove 102 in the first detection beam 1. A threaded structure is provided at the bottom of the detection rod 7, and the detection rod 7 and the mounting sleeve 802 are connected by threads. A plug-in plate 801 is installed on the mounting member 8, and the plug-in plate 801 is plugged into the slot 101 in the first detection beam 1;

[0036] If necessary, Figure 1 As shown, the mounting member 8 and the first detection beam 1 are plugged in through the plug plate 801 and the slot 101, and the two can only slide relative to each other left and right. The detection rod 7 is inserted from the mounting sleeve 802 on the upper side of the mounting member 8 into the groove 102 in the mounting member 8, which limits the ability of the mounting member 8 to move left and right. A thread is set at the bottom of the detection rod 7, so that the position between the mounting member 8 and the first detection beam 1 can be locked (without a thread, the first detection rod 7 can be pulled up and down, but it is inserted into the mounting sleeve 802 and will not fall over);

[0037] Furthermore, a fixing frame 803 is installed on the mounting member 8. When the deflection value of the road surface to be tested is detected, the lower end surface of the fixing frame 803 is fitted with the upper end surface of the first detection beam 1. A straight rod is fixedly installed on the fixing frame 803. The straight rod is inserted into the knocking plate 804. The knocking plate 804 and the straight rod can rotate relative to each other, and can also slide up and down relative to each other. The knocking plate 804 is fixedly connected to the knocking ball 805. A card slot for inserting the knocking plate 804 is provided in the fixing frame 803. After the knocking plate 804 is inserted into the card slot, it cannot move up and down. The knocking plate 804 is connected Connect the knocking power mechanism 807. When the knocking plate 804 is not inserted into the card slot, the knocking power mechanism 807 is used to drive the knocking plate 804 to knock the first detection beam 1 up and down. The knocking power mechanism 807 drives the knocking plate 804 to move up and down to knock the first detection beam 1, which can make the first detection beam 1 and the detection rod 7 shake slightly up and down, and the detection contact in the measuring device 6 against the detection rod 7 will be displaced. If the value of the dial indicator changes, it means that the dial indicator is operating normally and the measurement can continue. Otherwise, it means that the dial indicator is damaged and the measurement cannot be continued.

[0038] It should be noted that the knocking power mechanism 807 includes a T-shaped rod 8071, which is inserted into the arc-shaped guide plate 8072 and can rotate along the inner wall of the arc-shaped guide plate 8072. The fixed frame 803 is provided with an arc-shaped groove at the position corresponding to the arc-shaped guide plate 8072. The center of the arc-shaped guide plate 8072 coincides with the center line of the straight rod. The T-shaped rod 8071 is fixedly connected to the lifting block 8073, the lifting block 8073 is connected to the compression spring, the lifting block 8073 is slidably connected to the guide sleeve, and the guide sleeve is fixedly installed on the fixed frame 803.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A road strength tester, comprising a first detection beam (1), a second detection beam (2), a measuring device (6), and a detection rod (7), characterized in that: The first detection beam (1) is rotatably mounted on the base (3), and the first detection beam (1) is detachably connected to the second detection beam (2); The measuring device (6) comprises a lifting frame and a dial indicator. The lifting frame has the function of adjusting the height of the dial indicator. When measuring the deflection value of the road surface to be measured, the detection contact of the dial indicator is against the detection rod (7); The detection rod (7) is inserted into the mounting sleeve (802) in the mounting member (8), and the detection rod (7) passes through the mounting sleeve (802) and is inserted into the groove (102) in the first detection beam (1). The mounting member (8) is provided with an inserting plate (801), and the inserting plate (801) is plugged into the slot (101) in the first detection beam (1); The mounting member (8) is provided with a fixing frame (803), a straight rod is fixedly installed on the fixing frame (803), the straight rod is inserted into the knocking plate (804), the knocking plate (804) is fixedly connected to the knocking ball (805), a slot for inserting the knocking plate (804) is provided in the fixing frame (803), and after the knocking plate (804) is inserted into the slot, it cannot move up and down; The knocking plate (804) is connected to the knocking power mechanism (807). When the knocking plate (804) is not inserted into the slot, the knocking power mechanism (807) is used to drive the knocking plate (804) to knock the first detection beam (1) up and down.

2. A road strength tester according to claim 1, characterized in that: Four positioning members are inserted between the first detection beam (1) and the second detection beam (2). The positioning members may be latches or bolts. The positioning members pass through the first detection beam (1) and are inserted into the second detection beam (2).

3. A road strength tester according to claim 1, characterized in that: The second detection beam (2) is provided with a mounting groove, in which a temperature detector (5) for detecting the road surface temperature in the area to be detected is installed.

4. A road strength tester according to claim 1, characterized in that: A threaded structure is provided at the bottom of the detection rod (7), and the detection rod (7) is connected to the mounting sleeve (802) via threads.

5. A road strength tester according to claim 1, characterized in that: The striking power mechanism (807) comprises a T-shaped rod (8071), the T-shaped rod (8071) is inserted into the arc-shaped guide plate (8072), and the T-shaped rod (8071) can rotate along the inner wall of the arc-shaped guide plate (8072), and the fixed frame (803) is provided with an arc-shaped groove at a position corresponding to the arc-shaped guide plate (8072), and the center of the arc-shaped guide plate (8072) coincides with the center line of the straight rod.

6. A road surface strength tester according to claim 5, characterized in that: The T-shaped rod (8071) is fixedly connected to the lifting block (8073), the lifting block (8073) is connected to the compression spring, the lifting block (8073) is slidably connected to the guide sleeve, and the guide sleeve is fixedly installed on the fixing frame (803).

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