A road subgrade and pavement material strength detection device and method

Abstract

The invention discloses a road subgrade and pavement material strength testing device and method thereof, comprising a testing base, a weight and a guide rod, the weight impacts the testing base along the guide rod in a free-falling state, a fixed adjusting block is provided at the upper end of the guide rod, an adjusting ring plate which can move up and down is provided at the bottom of the adjusting block, a connecting ring plate is provided at the upper end of the weight, a fixedly connected positioning ring plate is provided on the outer wall of the connecting ring plate, a plurality of retractable first positioning lock tongues which are used for inserting and engaging the positioning ring plate are provided on the inner wall of the adjusting ring plate; the weight can be rebounded after the impact without the need for manual gripping and lifting of the weight, the use is more convenient, the user's reaction ability does not need to be excessively required, and the user's negligence or untimely reaction, which leads to the failure to grip the weight in time, causes the weight to fall again after rebounding to impact the testing base, and affects the accuracy of the testing base data.

Description

Technical Field

[0001] The invention belongs to the technical field of pavement material strength detection, and in particular relates to a road subgrade and pavement material strength detection device and method. Background Art

[0002] In road construction, the quality of the roadbed and pavement is directly related to the service life, driving safety and comfort of the road. As the foundation of the road, the roadbed bears the driving load from the road surface and spreads it to the foundation; the road surface is in direct contact with the vehicle tires, and is subjected to repeated rolling, wear and tear of the vehicle and erosion by the natural environment. Therefore, it is crucial to ensure that the roadbed and pavement materials have sufficient strength.

[0003] The handheld drop weight deflectometer generates a certain impact force through the mass and drop height of the drop weight, exerts pressure on the roadbed or road surface, simulates the driving load, and causes the roadbed or road surface to deform instantly. At the same time, the deformation of the roadbed or road surface is measured by sensors, and then the reaction coefficient K value, elastic modulus E value, deflection value and other parameters of the roadbed or road surface are calculated to evaluate the bearing capacity and deformation performance of the roadbed or road surface. When using a handheld drop weight deflectometer, first place the test base at the position to be tested, and then place the guide rod on the test base. The user is required to control the weight to fall when the guide rod is in a vertical state, so that the weight impacts the test base, and use the sensor in the test base for detection. When in use, the weight will rebound due to the reaction force after falling and impacting, and automatically rise to a certain height. At this time, the user is required to have a certain reaction ability and attention, so that the weight can be held by the user's hand during the rising process, and the weight can be driven to the initial position before the next test is performed. The purpose of doing this is to prevent the weight from impacting the test base again due to gravity after rebounding, thereby affecting the test results. This way of holding the weight by hand requires the user to have a certain reaction ability and attention when using it. If negligence occurs, it is easy to cause the weight to impact again after rebounding, affecting the accuracy of the test data.

[0004] Therefore, the existing structure and deficiencies are studied and improved, and a road subgrade and pavement material strength detection device and method are provided, in order to achieve a more practical purpose. Summary of the invention

[0005] In view of at least one problem in the prior art, an object of the present invention is to provide a device and method for detecting the strength of road subgrade and pavement materials.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A road subgrade and pavement material strength detection device comprises a detection base, a weight and a guide rod, wherein the weight impacts the detection base along the guide rod in a free-falling state, a fixed adjustment block is provided at the upper end of the guide rod, an adjustment ring plate which can move up and down is provided at the bottom of the adjustment block, a connecting ring plate is provided at the upper end of the weight, a fixedly connected positioning ring plate is provided on the outer side wall of the connecting ring plate, and a plurality of retractable first positioning lock tongues which are used to insert and engage with the positioning ring plate are provided on the inner side wall of the adjusting ring plate.

[0007] Preferably, a symmetrically distributed first adjustment groove is provided at the bottom of the adjustment block, an adjustment plate is provided in the first adjustment groove, and a scissor-type lifting mechanism is also provided in the first adjustment groove, the adjustment plate is fixedly connected to the adjustment ring plate, and two first driving blocks that can move back and forth and are used to drive the scissor-type lifting mechanism to extend and retract are provided in the first adjustment groove, and the scissor-type lifting mechanism is connected to the adjustment plate.

[0008] Preferably, the first adjustment slots are provided with multiple adjustment rods, the middle of the adjustment rods are provided with a first connecting shaft, and both ends of the adjustment rods are provided with a second connecting shaft, the first connecting shaft between two adjacent adjustment rods is rotatably connected, the two adjacent second connecting shafts are rotatably connected, the first driving blocks are respectively rotatably connected to the corresponding second connecting shafts, and the adjustment plate is provided with two slidingly connected second driving blocks, and the second driving blocks are respectively rotatably connected to the corresponding second connecting shafts.

[0009] Preferably, the adjustment block is further provided with a second adjustment groove for connecting the two first adjustment grooves, the second adjustment groove is provided with a fixedly connected drive box, both ends of the drive box are provided with symmetrically distributed and fixedly connected first hydraulic rods, and the ends of the first hydraulic rods are fixedly connected to the corresponding first drive blocks.

[0010] Preferably, a fixedly connected hydraulic box is provided in the driving box, a hydraulic plate that can move back and forth is provided in the hydraulic box, and a one-way liquid outlet pipe is provided at the outlet of one end of the hydraulic box, a connected guide pipe is provided on the outside of the one-way liquid outlet pipe, and the extended ends of the guide pipe are respectively connected to the liquid inlet ends of the first hydraulic rod, a liquid storage tank is provided in the hydraulic box, and a connected one-way liquid inlet pipe is provided at the inlet of one end of the hydraulic box, the one-way liquid inlet pipe is connected to the liquid storage tank, a connected and selectively openable return pipe is provided on the guide pipe, and the extended end of the return pipe is connected to the liquid storage tank, and the first hydraulic rod is provided with a first spring for driving the first hydraulic rod to automatically contract.

[0011] Preferably, a rotatable driving shaft is provided in the hydraulic box, the driving shaft passes through the middle of the hydraulic plate, and a reciprocating thread matching the hydraulic plate is provided on the driving shaft, a driving rack that can move up and down is provided in the driving box, and a driving gear that is unidirectionally connected and meshing with the driving rack is provided on the outer side of the driving shaft.

[0012] Preferably, the adjusting block is provided with a handle rod, a pressing groove is provided on one side of the handle rod, a pressing plate is provided in the pressing groove which is slidable and sealed, and a second spring is provided in the pressing groove for driving the pressing plate to automatically pop out, a slide groove is provided in the adjusting block, one end of the slide groove is provided in the handle rod, and the other end of the slide groove is provided in the guide rod, the end of the slide groove is communicated with the pressing groove, the driving rack is slidably and sealedly connected to the slide groove, a connecting box is provided in the driving box, the return pipe crosses the connecting box, and the return pipe is connected to the adapter groove, the handle A linkage groove is also provided on one side of the rod, a first rod is provided at one end of the linkage groove, an extension plate for pressing the first rod is provided at one end of the pressing plate, the other end of the linkage groove is arranged in the second adjusting groove, and a sliding and sealed adapter plate is provided at the other end of the linkage groove, the other end of the adapter plate is slidably and sealedly connected in the connecting box, a docking hole for connecting the return pipe and the connecting groove is provided on the adapter plate, a fixedly connected and bendable connecting piece is provided on the first driving block, and the extending end of the connecting piece is slidably and sealedly connected through the connecting box and is fixedly connected to the adapter plate.

[0013] Preferably, a first positioning groove is provided on the inner wall of the adjustment ring plate, the first positioning lock tongue is slidably connected in the first positioning groove, a third spring is provided in the first positioning groove for driving the first positioning lock tongue to pop out automatically, and a linkage part is also provided in the first positioning groove for driving the first positioning lock tongue to automatically retract.

[0014] Preferably, a second positioning groove is provided on one side of the adjustment plate, a second positioning lock tongue is provided in the second positioning groove for sliding and sealing connection, a fourth spring is provided in the second positioning groove for driving the second positioning lock tongue to pop out automatically, and a first connecting groove is provided at one end of the second positioning groove for communicating with each other, a sliding and sealing connection is provided in the first connecting groove; a plurality of fixedly connected and bendable linkage parts are provided at one end of the slider, and the extending ends of the linkage parts are fixedly connected to the corresponding first positioning lock tongues; a third hydraulic rod is fixedly connected in the unlocking groove, an unlocking rod is provided at the end of the third hydraulic rod for squeezing and contracting the second positioning lock tongue, and a second connecting groove for communicating with the third hydraulic rod is provided on one side of the pressing groove.

[0015] A method for detecting the strength of road subgrade and pavement materials, using the above-mentioned device for detecting the strength of road subgrade and pavement materials, comprises the following steps: S1 places the detection base at the position to be detected, and then releases the heavy hammer, which automatically falls down along the guide rod until the heavy hammer hits the detection base, and the detection base automatically detects the impact data; After the S2 heavy hammer strikes, it will automatically bounce upwards to a certain distance along the guide rod. Before the heavy hammer bounces upwards, the control adjustment ring plate automatically moves downwards to the set position, so that when the heavy hammer bounces upwards to the highest point, the positioning ring plate engages with the first positioning lock tongue, and then the positioning ring plate is controlled to rise and return to the initial position; S3 The above operation is repeated three times to realize the detection of the strength of the road surface material by the detection base.

[0016] Compared with the prior art, the present invention has the following technical effects: The design of the adjusting ring plate, the connecting ring plate, the positioning ring plate and the first positioning locking tongue can realize the connection and fixation between the adjusting ring plate and the weight through the engagement of the first positioning locking tongue and the positioning ring plate. At the same time, in conjunction with the up and down movement of the adjusting ring plate, the weight can be fixed to the adjusting ring plate through the downward movement of the adjusting ring plate and the engagement between the first positioning locking tongue and the positioning ring plate during the rebound of the weight after the impact. Then, the upward movement of the adjusting ring plate allows the weight to automatically rise and restore to its initial position. Such a design can realize the process of the weight rebounding after the impact without the need for manual gripping and lifting of the weight, which is more convenient to use and does not require too many requirements on the user's reaction ability. It also effectively avoids the situation where the user is unable to grip the weight in time due to negligence or untimely reaction, so that the weight falls again after rebounding and impacts the detection base, thereby affecting the accuracy of the detection base data.

[0017] With reference to the following description and the accompanying drawings, the specific embodiments of the present invention are disclosed in detail, indicating the manner in which the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope thereby.

[0018] Features described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0019] It should be emphasized that the term “include / comprises” when used herein refers to the presence of features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps or components. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure provided by the present invention.

[0022] Figure 2 This is a schematic diagram of the three-dimensional connection structure of the handle bar and the scissor-type lifting mechanism provided by the present invention.

[0023] Figure 3 This is a schematic diagram of the cross-sectional connection structure of the handlebar and the adjustment block provided by the present invention.

[0024] Figure 4 This is a schematic diagram of the cross-sectional structure of the first adjustment groove provided by the present invention.

[0025] Figure 5 The present invention provides Figure 4 Enlarged view of point A in the middle.

[0026] Figure 6 This is a schematic diagram of the top cross-sectional connection structure of the drive box provided by the present invention.

[0027] Figure 7 This is a schematic diagram of the cross-sectional connection structure of the connecting box and the return pipe provided by the present invention.

[0028] Explanation of the reference numerals in the figure: 1. Detection base; 2. Guide rod; 3. Weight; 31. Connecting ring plate; 311. Positioning ring plate; 32. Handle ring; 4. Handle rod; 41. Pressing plate; 410. Driving rack; 411. Pressing groove; 412. Second connecting groove; 413. Second spring; 414. Extension plate; 415. Linkage groove; 416. First rod; 417. Slide groove; 5. Adjustment block; 51. Adjustment ring plate; 511. Third spring; 512. Linkage member; 513. First positioning lock tongue; 52. Adjustment plate; 521. Second positioning lock tongue; 522. Second positioning groove; 523. Fourth spring; 524. The first connecting groove; 525, the slider; 53, the adjusting rod; 531, the first connecting shaft; 54, the first driving block; 55, the driving box; 551, the driving gear; 552, the one-way liquid inlet pipe; 553, the guide pipe; 554, the liquid storage box; 555, the reciprocating thread; 556, the hydraulic plate; 557, the hydraulic box; 558, the one-way liquid outlet pipe; 550, the reflux pipe; 5501, the adapter plate; 5502, the adapter hole; 5503, the connecting box; 5504, the connecting piece; 56, the first spring; 57, the first hydraulic rod; 58, the first adjusting groove; 581, the third hydraulic rod; 582, the unlocking rod; 59, the second adjusting groove. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0030] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be another element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be another element centered thereon at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0032] Example 1, please refer to Figure 1 , Figure 4 and Figure 5 A roadbed and pavement material strength testing device comprises a testing base 1, a weight 3 and a guide rod 2. The weight 3 impacts the testing base 1 along the guide rod 2 in a free-falling state. A fixed adjustment block 5 is provided at the upper end of the guide rod 2. An adjustment ring plate 51 that can move up and down is provided at the bottom of the adjustment block 5. A connecting ring plate 31 is provided at the upper end of the weight 3. A fixedly connected positioning ring plate 311 is provided on the outer wall of the connecting ring plate 31. A plurality of retractable first positioning lock tongues 513 that are used to insert and engage the positioning ring plate 311 are provided on the inner wall of the adjusting ring plate 51. A fixedly connected handle ring 32 is provided on the weight 3. The handle ring 32 is used for moving and carrying the weight 3.

[0033] The design of the adjusting ring plate 51, the connecting ring plate 31, the positioning ring plate 311 and the first positioning locking tongue 513 can realize the connection and fixation between the adjusting ring plate 51 and the weight 3 through the engagement of the first positioning locking tongue 513 and the positioning ring plate 311. At the same time, in conjunction with the up and down movement of the adjusting ring plate 51, the weight 3 can be fixed to the adjusting ring plate 51 during the rebound process after the impact through the downward movement of the adjusting ring plate 51 and the engagement between the first positioning locking tongue 513 and the positioning ring plate 311. Then, through the upward movement of the adjusting ring plate 51, the weight 3 can automatically rise and restore to its initial position. Such a design can realize that during the rebound process of the weight 3 after the impact, there is no need to manually hold the weight 3 and lift it, which is more convenient to use, does not require too much reaction ability of the user, and effectively avoids the user's negligence or untimely reaction, which leads to the failure to hold the weight 3 in time, so that the weight 3 falls again after rebounding to impact the detection base 1, affecting the accuracy of the data of the detection base 1.

[0034] In this example, see Figure 2 , Figure 3 and Figure 4 The bottom of the adjusting block 5 is provided with a symmetrically distributed first adjusting groove 58, an adjusting plate 52 is provided in the first adjusting groove 58, and a scissor-type lifting mechanism is also provided in the first adjusting groove 58, the adjusting plate 52 is fixedly connected to the adjusting ring plate 51, and two first driving blocks 54 that can move back and forth and are used to drive the scissor-type lifting mechanism to extend and retract are provided in the first adjusting groove 58, and the scissor-type lifting mechanism is connected to the adjusting plate 52, and a plurality of adjusting rods 53 are provided in the first adjusting groove 58, and a first connecting shaft 531 is provided in the middle of the adjusting rod 53, and a second connecting shaft is provided at both ends of the adjusting rod 53, and the first connecting shaft between two adjacent adjusting rods 53 is provided. A connecting shaft 531 is rotatably connected, two adjacent second connecting shafts are rotatably connected, the first driving blocks 54 are rotatably connected with the corresponding second connecting shafts respectively, and two slidingly connected second driving blocks are provided on the adjustment plate 52, and the second driving blocks are rotatably connected with the corresponding second connecting shafts respectively. The adjustment block 5 is also provided with a second adjustment groove 59 for connecting the two first adjustment grooves 58, and a fixedly connected driving box 55 is provided in the second adjustment groove 59. The two ends of the driving box 55 are provided with symmetrically distributed and fixedly connected first hydraulic rods 57, and the ends of the first hydraulic rods 57 are fixedly connected to the corresponding first driving blocks 54.

[0035] The characteristics of the scissor-type lifting mechanism can achieve long-distance movement of the adjustment ring plate 51 through a small-distance displacement of the first hydraulic rod 57, so that the adjustment ring plate 51 can be better moved to the set position, thereby realizing the control of the up and down movement of the adjustment ring plate 51.

[0036] In this example, see Figure 2 , Figure 4 and Figure 6 A fixedly connected hydraulic box 557 is provided in the driving box 55, and a hydraulic plate 556 that can move back and forth is provided in the hydraulic box 557, and a one-way liquid outlet pipe 558 is provided at the outlet of one end of the hydraulic box 557, and a connected guide pipe 553 is provided on the outside of the one-way liquid outlet pipe 558, and the extended ends of the guide pipe 553 are respectively connected to the liquid inlet ends of the first hydraulic rod 57, and a liquid storage tank 554 is provided in the hydraulic box 557, and a connected one-way liquid inlet pipe 552 is provided at the inlet of one end of the hydraulic box 557, and the one-way liquid inlet pipe 552 is connected to the liquid storage tank 554, and a connected and selectively openable return pipe 550 is provided on the guide pipe 553, and the extended end of the return pipe 550 is connected to the liquid storage tank 554, and the first hydraulic rod 57 is provided with a first spring 56 for driving the first hydraulic rod 57 to automatically contract.

[0037] The back-and-forth movement of the hydraulic plate 556, in conjunction with the one-way liquid outlet and the one-way liquid outlet, can allow the liquid in the liquid storage tank 554 to be continuously input into the first hydraulic rod 57, so that the first hydraulic rod 57 automatically extends, thereby realizing the automatic rise of the adjusting ring plate 51. When the heavy hammer 3 falls, since the time for the heavy hammer 3 to rebound from falling is short, the reflux pipe 550 is controlled to be connected, so that the hydraulic pressure in the first hydraulic rod 57 can flow back to the liquid storage tank 554 through the reflux pipe 550, so that the first hydraulic rod 57 can automatically contract and cooperate with the first spring 56. At the moment when the heavy hammer 3 falls, the reflux through the reflux pipe 550, coupled with the first spring 56, Elasticity, through the elasticity of the first spring 56 and the weight of the adjusting ring plate 51, the first hydraulic rod 57 can be driven to shrink quickly, so that the adjusting ring plate 51 can quickly fall to the set position, and the adjusting ring plate 51 can be better connected and fixed with the heavy hammer 3. After the adjusting ring plate 51 and the heavy hammer 3 are connected and fixed, by controlling the seal of the reflux pipe 550, and then moving the hydraulic plate 556 back and forth, in conjunction with the one-way liquid outlet and the one-way liquid outlet, the liquid in the liquid storage tank 554 can be continuously input into the first hydraulic rod 57, so that the first hydraulic rod 57 automatically extends, which can automatically drive the heavy hammer 3 to rise to the set height, realizing the automatic connection and rise of the heavy hammer 3.

[0038] In this example, see Figure 3 and Figure 6, a rotatable driving shaft is provided in the hydraulic box 557, the driving shaft passes through the middle of the hydraulic plate 556, and a reciprocating thread 555 matching the hydraulic plate 556 is provided on the driving shaft, a driving rack 410 that can move up and down is provided in the driving box 55, and a driving gear 551 that is unidirectionally connected and meshes with the driving rack 410 is provided on the outer side of the driving shaft, a handle bar 4 is provided on the adjusting block 5, a pressing groove 411 is provided on one side of the handle bar 4, a pressing plate 41 that is slidably and sealed is provided in the pressing groove 411, and a second spring 413 for driving the pressing plate 41 to automatically pop out is provided in the pressing groove 411, a sliding groove 417 is provided in the adjusting block 5, one end of the sliding groove 417 is arranged in the handle bar 4, and the other end of the sliding groove 417 is arranged in the guide rod 2, the end of the sliding groove 417 is communicated with the pressing groove 411, and the driving rack 410 and the sliding groove 417 are slidably and sealedly connected.

[0039] In this example, see Figure 3 , Figure 6 and Figure 7 The driving box 55 is provided with a connecting box 5503, the return pipe 550 crosses the connecting box 5503, and the return pipe 550 is connected to the adapter groove, and a linkage groove 415 is also provided on one side of the handle bar 4, and a first rod 416 is provided at one end of the linkage groove 415, and an extension plate 414 for pressing the first rod 416 is provided at one end of the pressing plate 41, and the other end of the linkage groove 415 is arranged in the second adjustment groove 59, and the other end of the linkage groove 415 is provided with an adapter plate 5501 that is slidably and sealedly connected, and the other end of the adapter plate 5501 is slidably and sealedly connected and arranged in the connecting box 5503 Inside, the adapter plate 5501 is provided with a docking hole for connecting the return pipe 550 and the adapter groove, and the first driving block 54 is provided with a fixedly connected and bendable connecting piece 5504, and the extending end of the connecting piece 5504 slides and is sealed and connected through the connecting box and is fixedly connected to the adapter plate 5501. When the first driving block 54 moves the end of the first adjusting groove 58, the connecting piece 5504 is tightened to drive the adapter plate 5501 to move, so that the return pipe 550 is sealed, and when the extension plate 414 contacts and presses the first rod 416, the adjustment ring plate 51 and the adjustment plate 52 have been automatically separated.

[0040] The design of the reciprocating thread 555, the driving rack 410, the driving gear 551, the pressing rod, the slide groove 417, the return rod, and the adapter plate 5501 enables the user to drive the driving rack 410 to automatically move downward along the slide groove 417 through hydraulic transmission while pressing the pressing plate 41. Since the driving gear 551 is unidirectionally connected to the driving shaft, the driving shaft will not be driven to rotate at this time. The design of the extension plate 414 and the first rod 416 enables the user to first squeeze the first rod 416 through the extension plate 414 when the pressing plate 41 is pressed, and at the same time, drive the adapter plate 5501 to move through hydraulic transmission, so that the adapter hole 5502 on the adapter plate 5501 is connected to the return pipe 550. When the first driving block 54 moves to the end of the first adjusting groove 58, the tensioning of the connecting piece 5504 can drive the adapter plate 5501 to restore the initial position, so that the return pipe 550 is sealed, thereby realizing the selective sealing of the return pipe 550.

[0041] The adapter plate 5501 is driven to move back and forth, so as to realize the connection between the docking hole and the return pipe 550 and the sealing of the return pipe 550 , thereby realizing the selective connection of the return pipe 550 .

[0042] In this example, see Figure 3 , Figure 4 and Figure 5 A first positioning groove is provided on the inner wall of the adjusting ring plate 51, the first positioning lock tongue 513 is slidably connected in the first positioning groove, a third spring 511 is provided in the first positioning groove for driving the first positioning lock tongue 513 to automatically pop out, a linkage member 512 is also provided in the first positioning groove for driving the first positioning lock tongue 513 to automatically shrink, a second positioning groove 522 is provided on one side of the adjusting plate 52, a second positioning lock tongue 521 is provided in the second positioning groove 522 for sliding and sealing connection, a fourth spring 523 is provided in the second positioning groove 522 for driving the second positioning lock tongue 521 to automatically pop out, One end of the second positioning groove 522 is provided with a first connecting groove 524 that is connected to it, and a sliding block 525 that is slidable and sealed is provided in the first connecting groove 524; one end of the sliding block 525 is provided with a plurality of fixedly connected and bendable linkage members 512, and the extending ends of the linkage members 512 are fixedly connected to the corresponding first positioning lock tongues 513; a third hydraulic rod 581 is fixedly connected in the unlocking groove, and an unlocking rod 582 for squeezing and contracting the second positioning lock tongue 521 is provided at the end of the third hydraulic rod 581, and a second connecting groove 412 that is connected to the third hydraulic rod 581 is provided on one side of the pressing groove 411.

[0043] The design of the first connecting groove 524, the second connecting groove 412, the slider 525, the linkage member 512, and the third hydraulic rod 581 enables the third hydraulic rod 581 to automatically extend through hydraulic transmission after the pressing plate 41 is pressed, driving the unlocking rod 582 to squeeze the second positioning lock tongue 521, so that the second positioning lock tongue 521 automatically shrinks. The automatic shrinkage of the second positioning lock tongue 521 can drive the slider 525 to move through hydraulic transmission, thereby pulling the multiple first positioning lock tongues 513 to shrink synchronously through the linkage member 512, thereby realizing the automatic separation of the positioning ring plate 311 and the adjustment ring plate 51.

[0044] When using this application: When the user only needs to keep the guide rod 2 in a vertical state, the user presses the pressing plate 41 with his hand. The pressing of the pressing plate 41 can make the driving rack 410 and the third hydraulic rod 581 move synchronously through hydraulic transmission. Since the driving gear 551 is a one-way rotation connection, the driving rack 410 will not drive the driving shaft to rotate during the downward movement, so that the hydraulic box 557 will not be sucked at this time; at the same time, the extension of the third hydraulic rod 581 can drive the unlocking rod 582 to move downward, so that the unlocking rod 582 squeezes and contracts the second positioning lock tongue 521, and the automatic contraction of the second positioning lock tongue 521 can drive the slider 525 to move through hydraulic transmission, thereby pulling the multiple first positioning lock tongues 513 to shrink synchronously through the linkage 512, so as to realize the automatic separation of the positioning ring plate 311 and the adjusting ring plate 51. At this time, the heavy hammer 3 will automatically fall due to gravity. At the same time, when the third hydraulic rod 581 extends to drive the unlocking rod 582 to squeeze the second positioning lock tongue 521, the continued pressing of the pressing plate 41 can The extension plate 414 squeezes the first rod 416 and drives the hydraulic pressure to move the adapter plate 5501, so that the adapter hole 5502 is connected with the return pipe 550. At this time, the first hydraulic rod 57 loses its limit fixation. Under the elastic action of the first spring 56, the first hydraulic rod 57 is driven to automatically contract, so that the liquid in the first hydraulic rod 57 automatically enters the liquid storage tank 554 through the return pipe 550. The automatic contraction of the first hydraulic rod 57 can control the scissor-type telescopic mechanism to automatically and quickly extend, thereby driving The adjusting ring plate 51 automatically drops to the set position. In this way, the moment the weight 3 drops, the adjusting ring plate 51 can be controlled to automatically drop synchronously. When the first hydraulic rod 57 is extended to the maximum length, that is, the first driving block 54 moves to the end, the tension of the connecting member 5504 can drive the adapter plate 5501 to move, so that the adapter plate 5501 returns to the initial position, so that the return pipe 550 is sealed. At this time, the user has released the pressing of the pressing plate 41, so the extension plate 414 will not affect the movement of the adapter plate 5501. At this time, the weight 3 is rising to the highest point. When the weight 3 rises to the highest point, the connecting ring plate 31 on the weight 3 enters the adjusting ring plate 51. Due to the characteristics of the scissor-type lifting mechanism, the connecting ring plate 31 is stationary after reaching the position. Therefore, the positioning ring plate 311 outside the connecting ring plate 31 can automatically squeeze the first positioning lock tongue 513. At this time, there is no obstruction outside the second positioning lock tongue 521. Therefore, the first positioning lock tongue 513 can automatically engage and fix the positioning ring plate 311, so that the adjusting ring plate 51 and the weight 3 are connected and fixed. When the extension plate 414 has completed squeezing the first rod 416, the pressing plate 41 has been pressed to the set position, and the size of the adapter hole 5502 is controlled so that the return pipe 550 is in a connected state during the pressing of the first rod 416. When the user releases the pressing of the pressing plate 41, the elasticity of the first spring 56 will drive the first hydraulic rod 57 to extend to the maximum. When the first hydraulic rod 57 is extended to the maximum, the tension of the connecting piece 5504 can drive the adapter plate 5501 to seal the return pipe 550. In this process, the elasticity of the first spring 56 can drive the pressing plate 41 to automatically extend outward. Movement, through hydraulic transmission, can drive the driving rack 410 and the third hydraulic rod 581 to synchronously restore the initial position; at this time, the upward movement of the driving rack 410 can drive the driving shaft to rotate through the meshing of the driving gear 551, and the rotation of the driving shaft, combined with the characteristics of the reciprocating thread 555, realizes the reciprocating movement of the hydraulic plate 556, and the one-way liquid outlet and the one-way liquid outlet cooperate to enable the liquid in the liquid storage tank 554 to be continuously input into the first hydraulic rod 57, so that the first hydraulic rod 57 automatically and slowly extends, thereby driving the heavy hammer 3 to automatically rise to the set height and restore the initial position; In this way, the above-mentioned method can be used so that the user only needs to press the pressing plate 41 to achieve the separation of the adjusting ring plate 51 and the weight 3, the automatic falling of the adjusting ring plate 51, the automatic connection of the adjusting ring plate 51 and the weight 3, and the automatic rising of the adjusting ring plate 51, thereby changing the original requirement that the user automatically grasps the rising weight 3 through his own reaction ability and raises the weight 3 through the strength of the user's arm. The method of the present application effectively prevents the situation where the user's reaction force is insufficient or the attention is not concentrated, which causes the weight 3 to rebound and impact the detection base 1 again.

[0045] A method for detecting the strength of road subgrade and pavement materials, using the above-mentioned device for detecting the strength of road subgrade and pavement materials, comprises the following steps: S1 places the detection base 1 at the position to be detected, and then releases the heavy hammer 3, so that the heavy hammer 3 automatically falls downward along the guide rod 2 until the heavy hammer 3 hits the detection base 1, and the detection base 1 automatically detects the impact data; After the S2 heavy hammer 3 strikes, it will automatically bounce upward along the guide rod 2 to a certain distance. Before the heavy hammer 3 bounces upward, the control adjustment ring plate 51 automatically moves downward to a set position, so that when the heavy hammer 3 bounces upward to the highest point, the positioning ring plate 311 engages with the first positioning lock tongue 513, and then the positioning ring plate 311 is controlled to rise and return to the initial position; S3 The above operation is repeated three times, and the strength of the road material can be tested by the testing base 1.

[0046] All articles and references disclosed, including patent applications and publications, are incorporated herein by reference for all purposes. The term "consisting essentially of..." to describe a combination should include the identified elements, ingredients, parts or steps and other elements, ingredients, parts or steps that do not substantially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe a combination of elements, ingredients, parts or steps herein also contemplates embodiments that consist essentially of these elements, ingredients, parts or steps. By using the term "may", it is intended to indicate that any attribute described that "may" include is optional.

[0047] Multiple elements, ingredients, parts or steps can be provided by a single integrated element, ingredient, part or step. Alternatively, a single integrated element, ingredient, part or step can be divided into separate multiple elements, ingredients, parts or steps. The disclosure "one" or "an" used to describe an element, ingredient, part or step is not intended to exclude other elements, ingredients, parts or steps.

[0048] It should be understood that the above description is for illustration and not for limitation. Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present application should not be determined with reference to the above description, but should be determined with reference to the appended claims and the full scope of equivalents to which such claims are entitled. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to be a waiver of the subject matter, nor should it be considered that the inventors did not consider the subject matter to be part of the disclosed inventive subject matter.

Claims

1. A road subgrade and pavement material strength detection device, characterized in that: It includes a detection base, a weight and a guide rod, the weight impacts the detection base along the guide rod in a free-falling state, a fixed adjustment block is provided at the upper end of the guide rod, an adjustment ring plate that can move up and down is provided at the bottom of the adjustment block, a connecting ring plate is provided at the upper end of the weight, a fixedly connected positioning ring plate is provided on the outer side wall of the connecting ring plate, and a plurality of retractable first positioning lock tongues that are used to insert and engage with the positioning ring plate are provided on the inner side wall of the adjusting ring plate.

2. The road subgrade and pavement material strength detection device according to claim 1, characterized in that: A symmetrically distributed first adjustment groove is provided at the bottom of the adjustment block, an adjustment plate is provided in the first adjustment groove, and a scissor-type lifting mechanism is also provided in the first adjustment groove. The adjustment plate is fixedly connected to the adjustment ring plate, and two first driving blocks that can move back and forth and are used to drive the scissor-type lifting mechanism to extend and retract are provided in the first adjustment groove. The scissor-type lifting mechanism is connected to the adjustment plate.

3. The road subgrade and pavement material strength detection device according to claim 2, characterized in that: The first adjustment slots are each provided with a plurality of adjustment rods, the middle part of the adjustment rods are each provided with a first connecting shaft, and both ends of the adjustment rods are provided with a second connecting shaft, the first connecting shaft between two adjacent adjustment rods is rotatably connected, the two adjacent second connecting shafts are rotatably connected, the first driving blocks are respectively rotatably connected with the corresponding second connecting shafts, and the adjustment plate is each provided with two slidingly connected second driving blocks, and the second driving blocks are respectively rotatably connected with the corresponding second connecting shafts.

4. The road subgrade and pavement material strength detection device according to claim 2, characterized in that: The adjustment block is also provided with a second adjustment groove for connecting the two first adjustment grooves, the second adjustment groove is provided with a fixedly connected drive box, both ends of the drive box are provided with symmetrically distributed and fixedly connected first hydraulic rods, and the ends of the first hydraulic rods are fixedly connected to the corresponding first drive blocks.

5. The road subgrade and pavement material strength detection device according to claim 4, characterized in that: The driving box is provided with a fixedly connected hydraulic box, the hydraulic box is provided with a hydraulic plate that can move back and forth, and a one-way liquid outlet pipe is provided at the outlet of one end of the hydraulic box, and a connected guide pipe is provided on the outside of the one-way liquid outlet pipe, and the extended ends of the guide pipe are respectively connected to the liquid inlet ends of the first hydraulic rod, and a liquid storage tank is provided in the hydraulic box, and a connected one-way liquid inlet pipe is provided at the inlet of one end of the hydraulic box, and the one-way liquid inlet pipe is connected to the liquid storage tank, and a connected and selectively openable return pipe is provided on the guide pipe, and the extended end of the return pipe is connected to the liquid storage tank, and the first hydraulic rod is provided with a first spring for driving the first hydraulic rod to automatically contract.

6. The road subgrade and pavement material strength detection device according to claim 5, characterized in that : A rotatable driving shaft is provided in the hydraulic box, the driving shaft passes through the middle of the hydraulic plate, and the driving shaft is provided with a reciprocating thread matched with the hydraulic plate. A driving rack that can move up and down is provided in the driving box, and a driving gear that is unidirectionally connected and meshed with the driving rack is provided on the outer side of the driving shaft.

7. The road subgrade and pavement material strength detection device according to claim 6, characterized in that: The adjusting block is provided with a handle bar, a pressing groove is provided on one side of the handle bar, a pressing plate is provided in the pressing groove which is slidable and sealed, and a second spring is provided in the pressing groove for driving the pressing plate to automatically pop out, a slide groove is provided in the adjusting block, one end of the slide groove is provided in the handle bar, and the other end of the slide groove is provided in the guide bar, the end of the slide groove is communicated with the pressing groove, the driving rack is slidably and sealedly connected to the slide groove, a connecting box is provided in the driving box, the return pipe crosses the connecting box, and the return pipe is connected to the adapter groove, and the handle bar is provided with a second spring. A linkage groove is also provided on the side, a first rod is provided at one end of the linkage groove, an extension plate for pressing the first rod is provided at one end of the pressing plate, the other end of the linkage groove is arranged in the second adjusting groove, and a sliding and sealed adapter plate is provided at the other end of the linkage groove, the other end of the adapter plate is slidably and sealedly connected in the connecting box, a docking hole for connecting the return pipe and the connecting groove is provided on the adapter plate, a fixedly connected and bendable connecting piece is provided on the first driving block, and the extending end of the connecting piece is slidably and sealedly connected through the connecting box and is fixedly connected to the adapter plate.

8. The road subgrade and pavement material strength detection device according to claim 7, characterized in that: A first positioning groove is provided on the inner wall of the adjusting ring plate, the first positioning lock tongue is slidably connected in the first positioning groove, a third spring is provided in the first positioning groove for driving the first positioning lock tongue to automatically pop out, and a linkage member is also provided in the first positioning groove for driving the first positioning lock tongue to automatically retract.

9. A method for detecting the strength of road subgrade and pavement materials, using the device for detecting the strength of road subgrade and pavement materials as described in any one of claims 1 to 8, characterized in that: The following steps are involved: S1 places the detection base at the position to be detected, and then releases the heavy hammer, which automatically falls down along the guide rod until the heavy hammer hits the detection base, and the detection base automatically detects the impact data; After the S2 heavy hammer strikes, it will automatically bounce upward along the guide rod to a set distance. Before the heavy hammer bounces upward, the control adjustment ring plate automatically moves downward to a set position, so that when the heavy hammer bounces upward to the highest point, the positioning ring plate engages with the first positioning lock tongue, and then the positioning ring plate is controlled to rise and return to the initial position; S3 The above operation is repeated three times to realize the detection of the strength of the road surface material by the detection base.

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