Drop hammer type dynamic deformation modulus testing device and testing method

Abstract

The invention relates to the technical field of testing, and particularly discloses a drop hammer type dynamic deformation modulus testing device and method, and the device comprises a measuring unit which is used for measuring the dynamic deformation modulus data during the impact of an impact hammer; the load guiding unit is used for periodically releasing the impact hammer to the impact platform; the lifting unit is used for continuously conveying the impact hammer at the releasing end of the load guiding unit to the throwing end of the load guiding unit; the unloading unit is used for transferring the impact hammer at the release end of the load guide unit to the input end of the lifting unit; the loading unit is used for transferring the impact hammer at the output end of the lifting unit to the throwing end of the load guiding unit; the released impact hammer is continuously lifted to the throwing end of the load guide unit by using the continuously moving lifting piece, so that continuous throwing of the impact hammer can be realized, and compared with a traditional operation process of reciprocating releasing and lifting of a single impact hammer, the dynamic deformation modulus testing efficiency can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of testing, and more specifically, it relates to a falling weight type dynamic deformation modulus testing device and a testing method. Background Art

[0002] A dynamic deformation modulus testing device is a device used to measure the mechanical properties and viscoelastic properties of materials under dynamic loads, and is usually used to evaluate the bearing capacity and deformation characteristics of subgrades, soils, asphalt and other materials;

[0003] During the dynamic deformation modulus test, the falling weight is lifted and hooked on the hooking device, and then the falling weight is unhooked and freely falls, and data such as the dynamic deformation modulus generated by the impact of the falling weight on the material to be tested is measured; the falling weight in the existing dynamic deformation modulus testing device is usually of a single-piece structure. During the test process, the released falling weight needs to be frequently lifted to the hooking height again. During the process of lifting the falling weight, the test is aborted, resulting in a long test cycle and affecting the efficiency of the entire test process. Summary of the Invention

[0004] In order to overcome the above technical problems, the present invention provides a falling weight type dynamic deformation modulus testing device and a testing method.

[0005] The object of the present invention can be achieved by the following technical solutions:

[0006] A falling weight type dynamic deformation modulus testing device includes a base, a support frame vertically fixed on the base, and a top plate fixed on the top of the support frame; it further includes:

[0007] A measuring unit, which is arranged on the base and includes an impact platform. A dynamic deformation modulus sensor is installed on the impact platform, and a waveform generator is placed on the upper end of the dynamic deformation modulus sensor;

[0008] A load guiding unit, which includes a throwing end on one side of the top plate and a release end on one side of the base, and is used to periodically release an impact hammer onto the impact platform;

[0009] A lifting unit, which is used to continuously convey the impact hammer at the release end of the load guiding unit to the throwing end of the load guiding unit, and includes a rotating cylinder rotatably installed at the upper and lower ends of the support frame, a transmission belt rotatably sleeved on the two ends of the rotating cylinder, and lifting members equidistantly distributed on the transmission belt. A driving motor for driving the rotating cylinder is fixedly installed on the support frame;

[0010] An unloading unit, which is arranged on the base and is used to transfer the impact hammer at the release end of the load guiding unit to the input end of the lifting unit;

[0011] A loading unit, which is arranged on the top plate and is used to transfer the impact hammer at the output end of the lifting unit to the throwing end of the load guiding unit.

[0012] As a further solution of the present invention: the load guiding unit includes a guiding pipe installed on the top plate, and a plurality of guiding pieces are arranged between the lower end of the guiding pipe and the impact platform; the guiding pieces are circumferentially distributed around the waveform generator and are used to guide the impact hammer to fall vertically.

[0013] As a further solution of the present invention: the lifting member includes a lifting plate, first side plates symmetrically distributed on both sides of the lifting plate, and a baffle vertically installed on the lifting plate. The height of the side of the lifting plate close to the transmission belt gradually decreases. The baffle is located on the side of the lifting plate close to the transmission belt, and a number of first avoidance grooves are equidistantly arranged on the lifting plate.

[0014] As a further solution of the present invention: the unloading unit includes limit members symmetrically distributed on both sides of the impact platform and a transposing member arranged at the input end of the lifting unit. The limit members are used to limit the unloading path of the impact hammer, and the transposing member is adapted to the lifting member; an unloading guiding member is arranged between the two limit members, and the unloading guiding member is used to guide the impact hammer on the impact platform to the transposing member.

[0015] As a further solution of the present invention: the limit member includes a limit plate vertically fixed on the base, and a number of stop bars are arranged on the limit plate; an opening for avoiding the impact hammer is arranged at the bottom of the guiding piece on the side close to the transposing member.

[0016] As a further solution of the present invention: the unloading guiding member includes a lifting sliding plate vertically and slidably embedded in the limit plate, and a lifting sliding groove slidably adapted to the lifting sliding plate is vertically opened in the limit plate; a guiding plate adapted to the transposing member is obliquely arranged on the limit plate, and the height of the end of the guiding plate facing the impact platform gradually increases.

[0017] As a further solution of the present invention: the transposing member includes a transposing table fixed on the support frame and second side plates symmetrically distributed on both sides of the transposing table. A number of groups of L-shaped stop bars are equidistantly distributed on the side of the transposing table close to the transmission belt, and second avoidance grooves staggered with the first avoidance grooves are formed between adjacent L-shaped stop bars. The height of the transposing table and the L-shaped stop bars on the side facing the transmission belt gradually decreases.

[0018] As a further solution of the present invention: the unloading unit further includes a lifting driving member. The lifting driving member includes fixed tables distributed on the opposite sides below the transposing table, and inclined grooves are opened on the fixed tables. The height of the side of the inclined groove facing the guiding plate gradually increases; a telescopic rod is slidably installed in the guiding plate, and a sliding rod is fixed at the end of the telescopic rod away from the guiding plate, and the sliding rod is slidably connected with the inclined groove.

[0019] As a further solution of the present invention: the loading unit includes a loading platform installed at the entrance of the guiding tube, an installation frame is fixed on the loading platform, and a number of loading levers are equidistantly arranged on the installation frame. The loading levers are used to transfer the impact hammer in the lifting member to the loading platform;

[0020] The height of the side of the loading lever facing the conveyor belt gradually decreases, and a third avoidance groove adapted to the lifting plate is formed between adjacent loading levers.

[0021] The present invention also discloses a method for testing the dynamic deformation modulus by a falling hammer, which includes the following steps:

[0022] S1. Release the impact hammer from the delivery end of the load guiding unit, and the impact hammer collides with the impact platform;

[0023] S2. The measuring unit measures the dynamic deformation modulus during the collision process;

[0024] S3. The unloading unit unloads the impact hammer on the impact platform and transfers it into the corresponding lifting member;

[0025] S4. The lifting member lifts the impact hammer upward to the delivery end of the load guiding unit;

[0026] S5. The loading unit transfers the impact hammer in the lifting member into the load guiding unit for re-delivery until the test is completed.

[0027] The beneficial effects of the present invention:

[0028] The present invention uses the continuously moving lifting member to continuously lift the released impact hammer to the delivery end of the load guiding unit, so that the continuous delivery of the impact hammer can be realized. Compared with the traditional operation process of reciprocally releasing and lifting a single impact hammer, the test efficiency of the dynamic deformation modulus can be effectively improved;

[0029] A lifting driving member interacting with the lifting member is provided. The rising process of the lifting member is used to drive the synchronous movement of the lifting driving member to drive the synchronous lifting of the guiding plate, so as to realize the unloading and transfer of the impact hammer; after the impact hammer is transferred into the transposing member, the lifting driving member automatically disengages from the lifting member and resets, so as not to interfere with the continuous lifting of the lifting member, so as to realize the transfer and lifting of the impact hammer from the transposing member;

[0030] A loading lever adapted to the lifting member is provided. By using the interaction between the lifting member and the loading lever during the upward movement of the lifting member, the loading lever applies a horizontal thrust to the impact hammer, so as to transfer the impact hammer in the lifting member out, and at the same time does not affect the smooth upward movement of the lifting member itself, so as to realize the automatic loading of the impact hammer. Description of the Drawings

[0031] The present invention will be further described below with reference to the accompanying drawings.

[0032] Figure 1 A three-dimensional schematic diagram of a falling weight type dynamic deformation modulus testing device of the present invention;

[0033] Figure 2 A three-dimensional schematic diagram of another perspective of a falling weight type dynamic deformation modulus testing device of the present invention;

[0034] Figure 3 A structural schematic diagram of a measuring unit and an unloading unit in a falling weight type dynamic deformation modulus testing device of the present invention;

[0035] Figure 4 A structural schematic diagram of a lifting unit in a falling weight type dynamic deformation modulus testing device of the present invention;

[0036] Figure 5 A structural schematic diagram of a lifting member in a falling weight type dynamic deformation modulus testing device of the present invention;

[0037] Figure 6 A structural schematic diagram of an unloading unit in a falling weight type dynamic deformation modulus testing device of the present invention;

[0038] Figure 7 A partial structural schematic diagram of an unloading unit in a falling weight type dynamic deformation modulus testing device of the present invention;

[0039] Figure 8 A structural schematic diagram of a transposing member in a falling weight type dynamic deformation modulus testing device of the present invention;

[0040] Figure 9 A side view of an unloading unit in a falling weight type dynamic deformation modulus testing device of the present invention;

[0041] Figure 10 A structural schematic diagram of a loading unit in a falling weight type dynamic deformation modulus testing device of the present invention;

[0042] Figure 11 A side view of a loading unit in a falling weight type dynamic deformation modulus testing device of the present invention.

[0043] In the figure:

[0044] 100, base; 110, support frame; 120, top plate;

[0045] 200, measuring unit; 210, impact platform; 220, dynamic deformation modulus sensor; 230, waveform generator;

[0046] 300, load guiding unit; 310, guiding tube; 320, guiding piece;

[0047] 400, Lifting unit; 410, Rotary drum; 420, Driving motor; 430, Transmission belt; 440, Lifting member; 441, Lifting plate; 442, First side plate; 443, First avoidance groove; 444, Baffle plate;

[0048] 500, Unloading unit; 510, Limiting member; 511, Limiting plate; 512, Lifting chute; 513, Stop bar; 520, Unloading guide member; 521, Lifting slide plate; 522, Guide plate; 523, Telescopic rod; 524, Slide bar; 530, Lifting driving member; 531, Fixed table; 532, Inclined groove; 540, Transposing member; 541, Transposing table; 542, L-shaped stop bar; 543, Second side plate; 544, Second avoidance groove;

[0049] 600, Loading unit; 610, Loading table; 620, Mounting frame; 630, Loading lever; 640, Third avoidance groove;

[0050] 700, Impact hammer. Detailed implementation manners

[0051] Now, the subject matter described herein will be discussed with reference to exemplary embodiments. It should be understood that discussing these embodiments is only to enable those skilled in the art to better understand and thus implement the subject matter described herein. Without departing from the scope of protection of the content of this specification, changes can be made to the functions and arrangements of the elements discussed. Each example can omit, substitute, or add various processes or components as needed. Additionally, the features described for some examples can also be combined in other examples.

[0052] Please refer to Figure 1 and Figure 2 , the present invention discloses a falling hammer type dynamic deformation modulus test device, including a base 100, a measurement unit 200, a load guiding unit 300, a lifting unit 400, an unloading unit 500, and a loading unit 600; a support frame 110 is vertically fixed on the base 100, and a top plate 120 is fixed on the top of the support frame 110;

[0053] Please refer to Figure 3 , the measurement unit 200 is arranged on the base 100, including an impact platform 210, a dynamic deformation modulus sensor 220 is installed on the impact platform 210, and a waveform generator 230 is placed on the upper end of the dynamic deformation modulus sensor 220;

[0054] The load guiding unit 300 includes a delivery end on one side of the top plate 120 and a release end on one side of the base 100, and is used to periodically release an impact hammer 700 onto the impact platform 210;

[0055] Please refer to Figure 2 and Figure 4, the lifting unit 400 is used to continuously convey the impact hammer 700 at the release end of the load guiding unit 300 to the delivery end of the load guiding unit 300, and includes a rotating cylinder 410 rotatably installed at the upper and lower ends of the support frame 110, a transmission belt 430 rotatably sleeved on the two ends of the rotating cylinder 410, and lifting members 440 equidistantly distributed on the transmission belt 430. A driving motor 420 for driving the rotating cylinder 410 is fixedly installed on the support frame 110;

[0056] The unloading unit 500 is arranged on the base 100 and is used to transfer the impact hammer 700 at the release end of the load guiding unit 300 to the input end of the lifting unit 400;

[0057] The loading unit 600 is arranged on the top plate 120 and is used to transfer the impact hammer 700 at the output end of the lifting unit 400 to the delivery end of the load guiding unit 300;

[0058] Specifically, the impact hammer 700 vertically drops from the delivery end of the load guiding unit 300 to the release end of the load guiding unit 300. The impact hammer 700 collides with the impact platform 210 to generate impact force and transient strain. The dynamic deformation modulus sensor 220 in the measuring unit 200 is used to measure parameters such as the dynamic force during the impact transient, the surface strain of the impact platform 210, and the sinking displacement of the impact platform 210 in real time. The waveform generator 230 is usually made of a circular rubber cushion with a certain thickness and is used to offset the strong noise during the collision between the impact hammer 700 and the dynamic deformation modulus sensor 220;

[0059] The driving motor 420 drives the rotating cylinder 410 to rotate, thereby driving the continuous movement of the lifting members 440 on the transmission belt 430. When an empty lifting member 440 reaches the release end of the load guiding unit 300, the unloading unit 500 transfers the impact hammer 700 on the impact platform 210 into the empty lifting member 440, and then the impact hammer 700 vertically ascends with the lifting member 440. When the lifting member 440 reaches the delivery end of the load guiding unit 300, the loading unit 600 transfers the impact hammer 700 in the lifting member 440 into the load guiding unit 300 and conducts the next round of release;

[0060] It should be noted that in order to ensure that the continuous impact process interferes with the measuring unit 200, the dropping period of the impact hammer 700 can be set. Specifically, it can be achieved by adjusting the movement speed of the conveyor belt 430 and the interval between adjacent lifting members 440. As long as it is ensured that the impact platform 210 can return to a stable state within the interval window period between the releases of adjacent impact hammers 700, that is to say, after the previous impact hammer 700 impacts the impact platform 210 and unloads, a certain period of recovery stability period needs to be provided to the impact platform 210. After waiting for the impact platform 210 to fully recover stability, the next group of impact hammers 700 can be dropped, so as to avoid the continuous dropping of adjacent impact hammers 700 from interfering with the dynamic deformation modulus measurement results.

[0061] It is worth noting that the released impact hammer 700 is continuously lifted to the dropping end of the load guiding unit 300 by the continuously moving lifting member 440, so that the continuous dropping of the impact hammer 700 can be realized. Compared with the operation process of the traditional single impact hammer 700 for reciprocating release and lifting, the test efficiency of the dynamic deformation modulus can be effectively improved.

[0062] In one embodiment, please refer to Figure 2 , the load guiding unit 300 includes a guiding tube 310 installed on the top plate 120, and a plurality of guiding pieces 320 are arranged between the lower end of the guiding tube 310 and the impact platform 210; the guiding pieces 320 are circumferentially distributed around the waveform generator 230 and are used to guide the impact hammer 700 to fall vertically;

[0063] Specifically, when the lifting member 440 carries the impact hammer 700 to the dropping end of the load guiding unit 300, the impact hammer 700 in the lifting member 440 is transferred into the guiding tube 310 through the loading unit 600. Subsequently, the impact hammer 700 enters the cylindrical channel formed by the surrounding of the guiding pieces 320 through the guiding tube 310 and falls vertically along the cylindrical channel until the impact hammer 700 contacts and collides with the impact platform 210 to realize the generation of the load.

[0064] In another embodiment, please refer to Figure 5 , the lifting member 440 includes a lifting plate 441, first side plates 442 symmetrically distributed on both sides of the lifting plate 441, and a baffle 444 vertically installed on the lifting plate 441. The height of one side of the lifting plate 441 close to the conveyor belt 430 gradually decreases. The baffle 444 is located on the side of the lifting plate 441 close to the conveyor belt 430, and a plurality of first avoidance grooves 443 are equidistantly arranged on the lifting plate 441;

[0065] When the impact hammer 700 enters the lifting member 440, the impact hammer 700 rolls along the upper end surface of the inclined lifting plate 441 until it contacts the baffle 444. The lifting plate 441 is used to support the impact hammer 700, and at the same time, the baffle 444 limits the position of the impact hammer 700. The first side plates 442 on both sides can prevent the impact hammer 700 from sliding out and falling from the lifting member 440.

[0066] Further, please refer to Figure 6 and Figure 7 The unloading unit 500 includes limit members 510 symmetrically distributed on both sides of the impact platform 210 and a transposing member 540 provided at the input end of the lifting unit 400. The limit members 510 are used to limit the unloading path of the impact hammer 700, and the transposing member 540 is adapted to the lifting member 440. An unloading guide member 520 is provided between the limit members 510 on both sides. The unloading guide member 520 is used to guide the impact hammer 700 on the impact platform 210 to the transposing member 540.

[0067] Specifically, when the impact hammer 700 collides with the impact platform 210, the impact hammer 700 is unloaded from the impact platform 210 and guided to the transposing member 540 through the unloading guide member 520. The limit members 510 can limit the moving path of the impact hammer 700, thereby preventing the impact hammer 700 from shifting and ensuring that the impact hammer 700 can smoothly reach the transposing member 540. When the empty lifting member 440 reaches the input end of the lifting unit 400, the impact hammer 700 on the transposing member 540 is transferred to the empty lifting member 440 to achieve the unloading and re-lifting of the impact hammer 700.

[0068] Correspondingly, please refer to Figure 6 and Figure 7 The limit member 510 includes a limit plate 511 vertically fixed on the base 100. A number of retaining rods 513 are provided on the limit plate 511. An opening for avoiding the impact hammer 700 is provided at the bottom of the guiding piece 320 on the side close to the transposing member 540.

[0069] The unloading guide member 520 includes a lifting slide plate 521 vertically and slidably embedded in the limit plate 511. A lifting chute 512 slidably adapted to the lifting slide plate 521 is vertically opened in the limit plate 511. A guide plate 522 adapted to the transposing member 540 is inclinedly provided on the limit plate 511. The height of the end of the guide plate 522 facing the impact platform 210 gradually increases.

[0070] In the initial state, the lifting slide plate 521 is located at the lower end of the lifting chute 512. At this time, the higher end of the guiding plate 522 extends into the impact platform 210 and does not contact the impact hammer 700. When it is necessary to unload the impact hammer 700 on the impact platform 210, the lifting slide plate 521 moves vertically upward along the lifting chute 512, thereby driving the entire guiding plate 522 to rise. Then, the higher end of the guiding plate 522 can be used to lift the impact hammer 700 on the impact platform 210 upward. Subsequently, the impact hammer 700 rolls toward the side of the transposing member 540 along the guiding plate 522 with a gradually decreasing height. During the rolling process of the impact hammer 700, the guiding plate 522 also gradually rises until the guiding plate 522 is connected to the transposing member 540, and then the impact hammer 700 on the guiding plate 522 can roll into the transposing member 540.

[0071] Please refer to Figure 8 , the transposing member 540 includes a transposing table 541 fixed on the support frame 110 and second side plates 543 symmetrically distributed on both sides of the transposing table 541. A number of groups of L-shaped retaining strips 542 are equidistantly distributed on one side of the transposing table 541 close to the transmission belt 430. Second avoidance grooves 544 are formed between adjacent L-shaped retaining strips 542 and are distributed alternately with the first avoidance grooves 443. The heights of the transposing table 541 and the L-shaped retaining strips 542 on the side facing the transmission belt 430 gradually decrease;

[0072] After the impact hammer 700 is transferred to the transposing table 541, it can roll along the inclined lower end surfaces of the transposing table 541 and the L-shaped retaining strips 542 until it abuts against the vertical part of the L-shaped retaining strip 542. When the no-load lifting member 440 is lifted upward from below the transposing member 540, the lifting plate 441 in the lifting member 440 just vertically passes upward through the second avoidance groove 544 in the transposing member 540, and each L-shaped retaining strip 542 also just passes through the corresponding first avoidance groove 443, so that the lifting member 440 and the transposing member 540 will not interfere in the vertical direction. During the process of the lifting member 440 vertically penetrating the transposing member 540, the impact hammer 700 on the transposing table 541 can be transferred to the lifting plate 441 and then lifted vertically upward together with the lifting member 440.

[0073] Regarding the lifting process of the guiding plate 522, the unloading unit 500 further includes a lifting driving member 530. The lifting driving member 530 includes fixing platforms 531 distributed on the opposite sides below the transposing table 541. An inclined groove 532 is formed on the fixing platform 531, and the height of the inclined groove 532 on the side facing the guiding plate 522 gradually increases. A telescopic rod 523 is slidably installed in the guiding plate 522. A sliding rod 524 is fixed to the end of the telescopic rod 523 away from the guiding plate 522, and the sliding rod 524 is slidably connected to the inclined groove 532;

[0074] Specifically, please refer to Figure 9, when the no-load lifting member 440 rotates with the conveyor belt 430 to below the telescopic rod 523, there is interference between the lifting plate 441 and the telescopic rod 523 in the vertical direction. Subsequently, the lifting member 440 rises vertically, and the lifting plate 441 can be used to synchronously push the telescopic rod 523 upward, thereby driving the guiding plate 522 to rise synchronously. During the vertical upward movement of the telescopic rod 523, the sliding rod 524 also slides correspondingly in the inclined groove 532, and the inclined groove 532 exerts a horizontal component force on the sliding rod 524, so that the telescopic rod 523 gradually retracts into the guiding plate 522, and the length of the interference between the telescopic rod 523 and the lifting plate 441 gradually decreases. Until the guiding plate 522 completely rises to be connected with the transfer table 541, the impact hammer 700 is successfully transferred to the transfer table 541. At this time, the telescopic rod 523 just completely disengages from the lifting plate 441, and the telescopic rod 523 no longer generates interference on the lifting plate 441 in the vertical direction. The lifting plate 441 can continue to rise and pass through the transfer member 540, while the guiding plate 522 and the telescopic rod 523 can slide down and reset under their own gravity. At the same time, the sliding rod 524 slides obliquely downward along the inclined groove 532, and the telescopic rod 523 gradually extends out of the guiding plate 522.

[0075] It should be noted that the lifting driving member 530 interacting with the lifting member 440 is provided, and the lifting driving member 530 is driven to move synchronously by using the rising process of the lifting member 440 to drive the synchronous lifting of the guiding plate 522, so as to realize the unloading and transfer of the impact hammer 700; and after the impact hammer 700 is transferred into the transfer member 540, the lifting driving member 530 automatically disengages and resets from the lifting member 440, so as not to interfere with the continuous lifting of the lifting member 440, so as to realize the transfer and lifting of the impact hammer 700 from the transfer member 540.

[0076] Furthermore, please refer to Figure 10 , the loading unit 600 includes a loading table 610 installed at the entrance of the guiding pipe 310. An installation frame 620 is fixed on the loading table 610, and a plurality of loading rods 630 are equidistantly arranged on the installation frame 620. The loading rods 630 are used to transfer the impact hammer 700 in the lifting member 440 to the loading table 610;

[0077] Correspondingly, the height of one side of the loading rod 630 facing the conveyor belt 430 gradually decreases, and a third avoidance groove 640 adapted to the lifting plate 441 is formed between adjacent loading rods 630;

[0078] Specifically, please refer to Figure 11, when the lifting member 440 loaded with the impact hammer 700 reaches the entrance of the guiding tube 310, as the lifting member 440 continues to rise, the downwardly inclined end of the loading lever 630 gradually inserts into the lifting member 440 and penetrates through the corresponding first avoidance groove 443. The loading lever 630 contacts the impact hammer 700 and applies a horizontal component force to the impact hammer 700, thereby causing the impact hammer 700 to move along the lifting plate 441 towards the loading table 610 side until the entire lifting member 440 completely penetrates upward through the loading lever 630. The impact hammer 700 is completely extruded from the lifting member 440 and transferred onto the loading table 610, and finally enters the guiding tube 310 to achieve the re - dropping of the impact hammer 700.

[0079] It should be noted that the loading lever 630 adapted to the lifting member 440 is provided. By utilizing the interaction between the lifting member 440 and the loading lever 630 during the upward movement of the lifting member 440, the loading lever 630 applies a horizontal thrust to the impact hammer 700, thereby transferring the impact hammer 700 in the lifting member 440 out, and at the same time not affecting the smooth upward movement of the lifting member 440 itself to achieve the automatic loading of the impact hammer 700.

[0080] In a further embodiment, a falling - hammer type dynamic deformation modulus testing method is also provided, including the following steps:

[0081] S1. Drop the impact hammer 700 from the dropping end of the load guiding unit 300, and the impact hammer 700 collides with the impact platform 210;

[0082] S2. The measuring unit 200 measures the dynamic deformation modulus during the collision process;

[0083] S3. The unloading unit 500 unloads the impact hammer 700 on the impact platform 210 and transfers it into the corresponding lifting member 440;

[0084] S4. The lifting member 440 lifts the impact hammer 700 upward to the dropping end of the load guiding unit 300;

[0085] S5. The loading unit 600 transfers the impact hammer 700 in the lifting member 440 into the load guiding unit 300 for re - dropping until the test is completed.

[0086] The specific implementation manners of this embodiment have been described above, but this embodiment is not limited to the above - mentioned specific implementation manners. The above - mentioned specific implementation manners are only illustrative and not restrictive. Under the inspiration of this embodiment, those of ordinary skill in the art can also make many forms, all of which fall within the protection scope of this embodiment.

Claims

1. A drop weight dynamic deformation modulus testing device, comprising a base (100), a support frame (110) vertically fixed on the base (100), and a top plate (120) fixed on the top of the support frame (110); characterized in that: Also includes: A measuring unit (200) is arranged on a base (100) and comprises an impact platform (210), a dynamic deformation modulus sensor (220) is mounted on the impact platform (210), and a waveform generator (230) is placed on the upper end of the dynamic deformation modulus sensor (220); A load guiding unit (300) comprises a delivery end located on one side of the top plate (120) and a release end located on one side of the base (100), and is used for periodically releasing the impact hammer (700) to the impact platform (210); A lifting unit (400) is used to continuously transport the impact hammer (700) at the release end of the load guiding unit (300) to the delivery end of the load guiding unit (300), comprising a rotating drum (410) rotatably mounted on the upper and lower ends of a support frame (110), a transmission belt (430) rotatably sleeved on the rotating drum (410) at both ends, and lifting members (440) equidistantly distributed on the transmission belt (430), wherein a driving motor (420) for driving the rotating drum (410) is fixedly mounted on the support frame (110); An unloading unit (500) is disposed on the base (100) and is used to transfer the impact hammer (700) at the release end of the load guiding unit (300) to the input end of the lifting unit (400); The loading unit (600) is arranged on the top plate (120) and is used to transfer the impact hammer (700) at the output end of the lifting unit (400) to the delivery end of the load guiding unit (300).

2. A drop weight dynamic deformation modulus testing device according to claim 1, characterized in that: The load guiding unit (300) comprises a guiding tube (310) mounted on a top plate (120), and a plurality of guiding plates (320) are arranged between the lower end of the guiding tube (310) and the impact platform (210); the guiding plates (320) are circumferentially distributed around the periphery of the waveform generator (230) and are used to guide the impact hammer (700) to fall vertically.

3. A drop weight dynamic deformation modulus testing device according to claim 1, characterized in that: The lifting member (440) comprises a lifting plate (441), first side plates (442) symmetrically distributed on both sides of the lifting plate (441), and a baffle (444) vertically installed on the lifting plate (441), the height of the lifting plate (441) on the side close to the transmission belt (430) gradually decreases, the baffle (444) is located on the side of the lifting plate (441) close to the transmission belt (430), and a plurality of first avoidance grooves (443) are equidistantly provided on the lifting plate (441).

4. A drop weight dynamic deformation modulus testing device according to claim 3, characterized in that: The unloading unit (500) comprises limiting members (510) symmetrically distributed on both sides of the impact platform (210) and a transfer member (540) arranged at the input end of the lifting unit (400), the limiting member (510) being used to limit the unloading path of the impact hammer (700), and the transfer member (540) being adapted to the lifting member (440); An unloading guide member (520) is provided between the limiting members (510) on both sides, and the unloading guide member (520) is used to guide the impact hammer (700) on the impact platform (210) to the transfer member (540).

5. A drop weight dynamic deformation modulus testing device according to claim 4, characterized in that: The limiting member (510) comprises a limiting plate (511) vertically fixed on the base (100), and a plurality of blocking rods (513) are arranged on the limiting plate (511).

6. A drop weight dynamic deformation modulus testing device according to claim 5, characterized in that: The unloading guide member (520) comprises a lifting slide plate (521), wherein the lifting slide plate (521) is vertically slidably embedded in a limiting plate (511), and a lifting groove (512) is vertically provided in the limiting plate (511) and is slidably matched with the lifting slide plate (521); a guide plate (522) matched with the transfer member (540) is obliquely arranged on the limiting plate (511), and the height of the guide plate (522) gradually increases toward one end of the impact platform (210).

7. A drop weight dynamic deformation modulus testing device according to claim 4, characterized in that: The transfer member (540) comprises a transfer platform (541) fixed on a support frame (110) and second side plates (543) symmetrically distributed on both sides of the transfer platform (541); a plurality of groups of L-shaped baffles (542) are evenly distributed on one side of the transfer platform (541) close to the transmission belt (430); second avoidance grooves (544) staggered with the first avoidance grooves (443) are formed between adjacent L-shaped baffles (542); and the heights of the transfer platform (541) and the L-shaped baffles (542) gradually decrease toward one side of the transmission belt (430).

8. A drop weight dynamic deformation modulus testing device according to claim 7, characterized in that: The unloading unit (500) further comprises a lifting driving member (530), wherein the lifting driving member (530) comprises a fixed platform (531) which is distributed on the opposite side below the transfer platform (541), wherein an inclined groove (532) is provided on the fixed platform (531), and the height of the inclined groove (532) gradually increases toward one side of the guide plate (522); a telescopic rod (523) is slidably installed in the guide plate (522), and a sliding rod (524) is fixed to one end of the telescopic rod (523) away from the guide plate (522), and the sliding rod (524) is slidably connected to the inclined groove (532).

9. A drop weight dynamic deformation modulus testing device according to claim 2, characterized in that: The loading unit (600) comprises a loading platform (610) installed at the entrance of the guide tube (310), a mounting frame (620) is fixed on the loading platform (610), a plurality of loading levers (630) are equidistantly arranged on the mounting frame (620), and the loading levers (630) are used to transfer the impact hammer (700) in the lifting member (440) to the loading platform (610); The height of the loading lever (630) gradually decreases toward one side of the transmission belt (430), and a third avoidance groove (640) adapted to the lifting plate (441) is formed between adjacent loading levers (630).

10. A testing method using the drop weight dynamic deformation modulus testing device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, dropping an impact hammer (700) from the dropping end of the load guiding unit (300), so that the impact hammer (700) collides with the impact platform (210); S2, a measuring unit (200) measures a dynamic deformation modulus during a collision; S3, the unloading unit (500) unloads the impact hammer (700) on the impact platform (210) and transfers it to the corresponding lifting member (440); S4, the lifting member (440) lifts the impact hammer (700) upward to the delivery end of the load guiding unit (300); S5. The loading unit (600) transfers the impact hammer (700) in the lifting member (440) to the load guiding unit (300) for re-deployment until the test is completed.

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