A device for detecting compressive strength of municipal roads and its use method

Abstract

This invention provides a device for testing the compressive strength of municipal roads, belonging to the field of municipal road testing devices. Its structure includes a testing base assembly, on the top surface of which a testing tripod is movably mounted. It also includes a pull-hammer lifting mechanism vertically mounted at the top of the testing tripod, a hammer lowering mechanism positioned above the lower end of the pull-hammer lifting mechanism, and a hammer assembly positioned below the pull-hammer lifting mechanism. Through the structural combination design of the testing base assembly, testing tripod, pull-hammer lifting mechanism, hammer lowering mechanism, hammer assembly, probe assembly, and operating platform, a testing device that can be quickly assembled on-site and has functions such as automatic hammer lifting, automatic hammer lowering, and vertically fixing the probe is achieved. This invention requires only one operator for on-site testing and operation, is simple and convenient to operate, requires no effort, is highly efficient, significantly reduces labor costs, and can be performed remotely, eliminating operational safety risks.

Description

Technical Field

[0001] This invention relates to a device for testing the compressive strength of municipal roads and its method of use, belonging to the field of municipal road testing devices. Background Technology

[0002] In the construction of municipal roads, it is necessary to test the bearing capacity and compressive strength of the road foundation. The commonly used testing device is the Dutch penetrometer.

[0003] However, the existing penetrometer detection device has a simple structure, consisting only of a probe and a hammer. It requires multiple workers to operate it manually. Some workers hold the probe, while others work together to lift the hammer and strike the probe. The workers operating both need to coordinate smoothly, otherwise there will be operational safety risks. In addition, manual operation requires a large number of workers, which is costly, time-consuming, labor-intensive, and has low work efficiency. There is an urgent need for a detection device that can be operated by a single worker to solve the above problems. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a device for testing the compressive strength of municipal roads and its usage method, so as to solve the existing problems.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: a device for testing the compressive strength of municipal roads, the structure of which includes a testing base frame assembly, a testing tripod movably mounted on the top surface of the testing base frame assembly, a pull hammer lifting mechanism vertically arranged at the top of the testing tripod, a hammer placing mechanism arranged above the lower end of the pull hammer lifting mechanism, and a hammer assembly arranged below the pull hammer lifting mechanism. A probe assembly is vertically arranged below the hammer assembly and is vertically sleeved in the middle of the testing base frame assembly. An operating table is placed on one side of the testing base frame assembly, and the pull hammer lifting mechanism and the hammer placing mechanism are electrically connected to the operating table.

[0006] A further improvement is that the testing base frame assembly includes a base frame, a probe stabilizing sleeve welded to the middle of the base frame, and a plurality of triangular stabilizing sleeves welded to the side of the top surface of the base frame. A plurality of adjusting feet are threadedly connected to the side of the bottom surface of the base frame.

[0007] A further improvement is that the detection tripod includes a top plate, a first leg, a second leg, and a third leg, which are respectively hinged to the bottom side of the top plate.

[0008] A further improvement is that the pull hammer lifting mechanism includes a first telescopic member, a pull hammer plate connected to the lower end of the first telescopic member, a first pull hammer assembly symmetrically arranged on both sides of the pull hammer plate, and a second pull hammer assembly.

[0009] A further improvement is that the first pull hammer assembly includes a pull hammer base, a pull hammer hook hinged to the pull hammer base, and a spring retainer plate disposed on one side of the pull hammer base. A spring is connected between the upper end of the pull hammer hook and the spring retainer plate. The first pull hammer assembly and the second pull hammer assembly have the same structure.

[0010] A further improvement is that the hammer-laying mechanism includes a hammer-laying base frame, second telescopic devices and a stabilizing rod respectively disposed on both sides of the top surface of the hammer-laying base frame, and a first hammer-opening pressure block and a second hammer-opening pressure block respectively disposed on both sides of the bottom surface of the hammer-laying base frame.

[0011] A further improvement is that the hammer assembly includes a hammer, a pull head disposed in the middle of the top surface of the hammer, a plurality of stabilizing slides disposed on both sides of the hammer, and a stabilizing slide rod sleeved through each of the stabilizing slides. Each of the stabilizing slide rods is provided with a threaded head and an anti-detachment block at its upper and lower ends, a buffer spring is sleeved at the lower end of each of the stabilizing slide rods, and a length reference table is provided on the body of each of the stabilizing slide rods.

[0012] A further improvement is that the probe assembly comprises a plurality of connecting probes, hammers, and probes.

[0013] A further improvement is that both the first and second hammer pressing blocks have inclined surfaces on their inner sides.

[0014] A further improvement is that the lower end of the pull hammer hook is provided with a latch that is adapted to the pull head.

[0015] A further improvement is that the outer side of the upper end of the pull hammer hook is provided with an arc-shaped surface adapted to the second hammer pressing block.

[0016] Furthermore, the present invention also provides a method for using the above-mentioned device for testing the compressive strength of municipal roads, the method of which is as follows:

[0017] First, place the testing base frame assembly at the road construction site to be tested. Then, adjust the height using the threads of the adjusting feet to align the top surface of the base frame horizontally. Next, fit the lower ends of the three legs on the testing tripod into the respective tripod stabilizing sleeves to complete the on-site assembly of the testing tripod. Then, thread the threads on the impact hammer assembly to both sides of the bottom surface of the base frame to complete the on-site assembly of the impact hammer assembly. Finally, quickly and electrically connect the operating platform to the hammer lifting mechanism and the hammer lowering mechanism to complete the overall on-site assembly of the compressive strength testing device.

[0018] When testing is required, first connect the connecting probes on the probe assembly to each other using threads, then install them vertically through the middle of the probe stabilizing sleeve, and then thread the hammer and probe to the upper and lower ends of the connected probes respectively. The number of connecting probes can be increased according to actual needs.

[0019] The detection method involves first extending the first telescopic device via the control panel, causing the hammer plate to descend. This allows the lower ends of the two hammer hooks on the two hammer assemblies to hook onto both sides of the hammer head under the action of two springs. Then, the first telescopic device retracts, lifting the hammer onto the two stabilizing slides. The lifting height is determined by the required distance between the bottom surface of the hammer and the top surface of the hammer head, which is assisted by a length reference table. Next, extending the second telescopic device on the hammer release mechanism via the control panel lowers the hammer release base, causing the two hammer opening blocks to compress the upper ends of the two hammer hooks inward, while the lower ends of the two hammer hooks separate outward, thus releasing the sides of the probe. This allows the hammer to fall vertically downward onto the two stabilizing slides and impacts the hammer head, causing the probe assembly to slide downward into the ground within the probe stabilizing sleeve. The compressive strength of the road foundation bearing capacity is measured based on the insertion depth of the probe assembly. Furthermore, the distance between the hammer and the hammer head must be consistent for each test.

[0020] The beneficial effects of the invention are:

[0021] This invention provides a device for testing the compressive strength of municipal roads. Through the structural combination design of the testing base frame, testing tripod, hammer lifting mechanism, hammer lowering mechanism, impact hammer assembly, probe assembly, and operating platform, it forms a testing device that can be quickly assembled on-site and has functions such as automatic hammer lifting, automatic hammer lowering, and vertically fixing the probe. This invention only requires one worker to conduct on-site testing and operation, is simple and convenient to operate, requires no effort, has high testing efficiency, can significantly reduce labor costs, and can be operated far away from the testing device, eliminating operational safety risks. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a municipal road compressive strength testing device according to the present invention;

[0023] Figure 2 This is a schematic diagram of the detection base frame assembly structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the tripod structure for testing according to the present invention;

[0025] Figure 4 This is a schematic diagram of the pull hammer lifting mechanism of the present invention;

[0026] Figure 5 This is a schematic diagram of the hammer-releasing mechanism of the present invention;

[0027] Figure 6 This is a schematic diagram of the hammer assembly structure of the present invention;

[0028] Figure 7 This is a schematic diagram of the probe assembly structure of the present invention;

[0029] Figure 8 This is a schematic diagram of the first pull hammer assembly structure of the present invention;

[0030] Figure 9 This is an enlarged schematic diagram of part A of the present invention. Detailed Implementation

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0032] Please see Figures 1-9This invention provides a schematic diagram of a structural solution for a municipal road compressive strength testing device: The structure includes a testing base frame 1, with a testing tripod 2 movably mounted on the top surface of the testing base frame 1. It also includes a pull hammer lifting mechanism 3 vertically mounted on the top of the testing tripod 2, a hammer lowering mechanism 4 positioned above the lower end of the pull hammer lifting mechanism 3, and a hammer assembly 5 positioned below the pull hammer lifting mechanism 3. A probe assembly 6 is vertically mounted below the hammer assembly 5 and vertically sleeved in the middle of the testing base frame 1. An operating platform 7 is placed beside the testing base frame 1. The pull hammer lifting mechanism 3... The hammer-laying mechanism 4 is electrically connected to the operating table 7. The detection base frame assembly 1 includes a base frame 11, a probe stabilizing sleeve 12 welded to the middle of the base frame 11, and a plurality of triangular frame stabilizing sleeves 13 welded to the top side of the base frame 11. A plurality of adjusting feet 14 are threadedly connected to the bottom side of the base frame 11. The detection triangular frame 2 includes a top plate 21, a first leg 22, a second leg 23, and a third leg 24 respectively hinged to the bottom side of the top plate 21. The hammer lifting mechanism 3 includes a first telescopic member 31, a hammer plate 32 connected to the lower end of the first telescopic member 31, and hammer plates symmetrically arranged on both sides of the hammer plate 32. The first pull hammer assembly 33 and the second pull hammer assembly 34 are located on the side. The first pull hammer assembly 33 includes a pull hammer seat 331, a pull hammer hook 332 hinged to the pull hammer seat 331, and a spring plate 333 disposed on one side of the pull hammer seat 331. A spring 334 is connected between the upper end of the pull hammer hook 332 and the spring plate 333. The first pull hammer assembly 33 and the second pull hammer assembly 34 have the same structure. The hammer placement mechanism 4 includes a hammer placement base frame 41, second telescopic devices 42 respectively disposed on both sides of the top surface of the hammer placement base frame 41, a stabilizing rod 43, and first hammers respectively disposed on both sides of the bottom surface of the hammer placement base frame 41. The impact hammer assembly 5 includes an impact hammer 51, a pull head 52 located in the middle of the top surface of the impact hammer 51, a plurality of stabilizing slides 53 located on both sides of the impact hammer 51, and stabilizing slide rods 54 sleeved on each of the stabilizing slides 53. Each of the stabilizing slide rods 54 is provided with a threaded head 55 and an anti-detachment block 56 at its upper and lower ends, a buffer spring 57 is sleeved on the lower end of each of the stabilizing slide rods 54, and a length reference table 58 is provided on the rod body of each of the stabilizing slide rods 54. The probe assembly 6 is composed of a plurality of connecting probe rods 61, hammer heads 62, and probes 63.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that 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, and 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 testing the compressive strength of municipal roads, comprising a testing base assembly (1), characterized in that: The top surface of the detection base frame (1) is movably installed with a detection tripod (2), and also includes a pull hammer lifting mechanism (3) vertically set at the top of the detection tripod (2), a hammer placing mechanism (4) set above the lower end of the pull hammer lifting mechanism (3), and a hammer assembly (5) set below the pull hammer lifting mechanism (3). A probe assembly (6) is vertically set below the hammer assembly (5). The probe assembly (6) is vertically sleeved in the middle of the detection base frame (1). An operating table (7) is placed on one side of the detection base frame (1). The pull hammer lifting mechanism (3) and the hammer placing mechanism (4) are electrically connected to the operating table (7). The pull hammer lifting mechanism (3) includes a first telescopic member (31), a pull hammer plate (32) connected to the lower end of the first telescopic member (31), a first pull hammer assembly (33) symmetrically arranged on both sides of the pull hammer plate (32), and a second pull hammer assembly (34). The first pull hammer assembly (33) includes a pull hammer seat (331), a pull hammer hook (332) hinged to the pull hammer seat (331), and a spring plate (333) disposed on one side of the pull hammer seat (331). A spring (334) is connected between the upper end of the pull hammer hook (332) and the spring plate (333). The first pull hammer assembly (33) and the second pull hammer assembly (34) have the same structure. The hammer-releasing mechanism (4) includes a hammer-releasing base frame (41), a second telescopic device (42) respectively disposed on both sides of the top surface of the hammer-releasing base frame (41), a stabilizing rod (43), a first hammer-opening pressure block (44) and a second hammer-opening pressure block (45) respectively disposed on both sides of the bottom surface of the hammer-releasing base frame (41).

2. The device for testing the compressive strength of municipal roads according to claim 1, characterized in that: The detection base frame assembly (1) includes a base frame (11), a probe stabilizing sleeve (12) welded to the middle of the base frame (11), and a plurality of triangular stabilizing sleeves (13) welded to the top side of the base frame (11). A plurality of adjusting feet (14) are threadedly connected to the bottom side of the base frame (11).

3. The device for testing the compressive strength of municipal roads according to claim 2, characterized in that: The detection tripod (2) includes a top plate (21), a first leg (22), a second leg (23), and a third leg (24) respectively hinged to the bottom side of the top plate (21).

4. The device for testing the compressive strength of municipal roads according to claim 3, characterized in that: The hammer assembly (5) includes a hammer (51), a pull head (52) located in the middle of the top surface of the hammer (51), a plurality of stabilizing slides (53) located on both sides of the hammer (51), and stabilizing slide rods (54) sleeved through each of the stabilizing slides (53). Each of the stabilizing slide rods (54) has a threaded head (55) and an anti-detachment block (56) at its upper and lower ends, respectively. Each of the stabilizing slide rods (54) has a buffer spring (57) sleeved at its lower end, and each of the stabilizing slide rods (54) has a length reference table (58) on its rod body.

5. The device for testing the compressive strength of municipal roads according to claim 4, characterized in that: The probe assembly (6) consists of a plurality of connecting probes (61), hammers (62) and probes (63).

6. A method of using the compressive strength testing device for municipal roads as described in claim 5, characterized in that, The usage method is as follows: First, place the testing base frame assembly (1) at the road construction site to be tested. Then, adjust the height by adjusting the threads of each adjusting foot pad (14) to make the top surface of the base frame (11) horizontally aligned. Then, put the lower ends of the three legs on the testing tripod (2) into the tripod stabilizing sleeves (13) respectively to complete the on-site assembly of the testing tripod (2). Then, thread the threads (55) on each of the hammer assembly (5) to both sides of the bottom surface of the base frame (11) to complete the on-site assembly of the hammer assembly (5). Then, quickly snap the operating table (7) into the pull hammer lifting mechanism (3) and the hammer release mechanism (4) to complete the overall on-site assembly of the compressive strength testing device. When testing is required, first connect each connecting probe (61) on the probe assembly (6) with threads, then pass through the middle of the probe stabilizing sleeve (12) for vertical installation, and then thread the hammer (62) and probe (63) to the upper and lower ends of the connected probe (61) respectively. The number of connecting probes (61) can be increased according to actual needs. The detection method involves first extending the first telescopic device (31) via the operating table (7), causing the hammer plate (32) to descend, so that the lower ends of the two hammer hooks on the two hammer assemblies hook onto both sides of the pull head (52) under the action of two springs. Then, the first telescopic device (31) retracts, causing the hammer (51) to be lifted upward on the two stabilizing slides (54). The lifting height is determined according to the required distance between the bottom surface of the hammer (51) and the top surface of the hammer head (62). The required distance is assisted by the length reference table (58). Then, the second telescopic device on the hammer release mechanism (4) is operated via the operating table (7). The device (42) extends, driving the hammer base frame (41) to descend, causing the two hammer opening blocks to compress the upper ends of the two hammer hooks inward, while the lower ends of the two hammer hooks will separate outward, thereby loosening the two sides of the probe (63), so that the hammer (51) falls vertically downward on the two stable slides (53) and the hammer head (62) impacts the hammer. The probe assembly (6) slides downward into the ground inside the probe stabilizing sleeve (12). The compressive strength of the road foundation bearing capacity is measured according to the insertion depth of the probe assembly (6). In addition, the distance between the hammer (51) and the hammer head (62) must be consistent each time.

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