An engineering quality detection device

Abstract

The application belongs to the technical field of slump detection, and particularly relates to an engineering quality detection device, which comprises a workbench, a first lifting mechanism and a second lifting mechanism are installed on the workbench; the first lifting mechanism is used for adjusting the height of a inserting and tamping assembly; the second lifting mechanism is used for adjusting the height of a slump cylinder; the inserting and tamping assembly comprises a mounting frame body, an inserting and tamping rod and a driving mechanism used for driving the inserting and tamping rod to extend and retract; a mounting plate is rotatably installed on the mounting frame body, a guide sleeve is rotatably installed on the mounting plate, and the inserting and tamping rod is arranged in the guide sleeve; the driving mechanism is used for driving the inserting and tamping rod to axially extend and retract along the guide sleeve; the application can improve the consistency of the inserting and tamping depth, the inserting and tamping direction and the inserting and tamping sequence, make the concrete slump detection process more standardized, reduce the human operation difference, and improve the stability and repeatability of the detection result.

Description

Technical Field

[0001] This invention relates to the field of slump testing technology, and more particularly to an engineering quality testing device. Background Technology

[0002] Concrete slump is a crucial indicator for evaluating concrete workability and is widely used in building construction, road engineering, and precast component production. Current slump testing typically employs a slump cone test. During the test, concrete is first layered into the slump cone, and each layer is compacted using a tamping rod. The slump cone is then raised, allowing the concrete to slump under its own weight. The slump height is used to evaluate the concrete's flowability and workability. To ensure accurate test results, the tamping process must maintain uniform internal compaction of the concrete, avoiding localized voids or over-compaction that could affect the final results.

[0003] In current slump testing processes, tamping is mostly done manually with a tamping rod. The insertion position, direction, number of tamping strokes, and depth are easily affected by the operator's experience and habits, leading to significant differences in tamping results among different testers. Furthermore, even with automatic tamping devices, the tamping rod is typically inserted and tamped in a fixed direction, resulting in a concentrated tamping area. This makes it difficult to evenly cover different areas of concrete within the slump cone, easily causing inconsistent internal density. In addition, changing the tamping direction usually requires an additional rotary drive mechanism or independent control mechanism, increasing equipment complexity and manufacturing costs, and potentially leading to poor control synchronization and high failure rates.

[0004] Therefore, it is necessary to provide an engineering quality testing device to solve the problems of single tamping direction, limited tamping coverage, poor consistency of tamping process, and the need for additional power and control mechanisms to achieve multi-directional tamping in the existing slump testing process, thereby improving the uniformity of concrete tamping and the accuracy and repeatability of slump test results. Summary of the Invention

[0005] This invention provides an engineering quality testing device, which aims to solve at least one of the above-mentioned technical problems.

[0006] This invention provides the following technical solution: An engineering quality testing device includes a workbench with a first lifting mechanism and a second lifting mechanism mounted on it. The first lifting mechanism is used to adjust the height of a tamping assembly, and the second lifting mechanism is used to adjust the height of a slump cylinder. The tamping assembly includes a mounting frame, a tamping rod, and a drive mechanism for extending and retracting the tamping rod. A mounting plate is rotatably mounted on the mounting frame, and a guide sleeve is rotatably mounted on the mounting plate. The tamping rod passes through the guide sleeve. The drive mechanism drives the tamping rod to extend and retract axially along the guide sleeve. A gear ring is fixedly mounted on the mounting frame, and a gear meshing with the gear ring is mounted on the mounting plate. The gear is connected to the input end of an indexing mechanism. The output end of the indexing mechanism is connected to a swing mechanism, which is connected to the guide sleeve via a transmission connection. During the rotation of the mounting plate, the gear and gear ring rotate relative to each other, driving the indexing mechanism to accumulate input. After the indexing mechanism reaches a preset input amount, it drives the swing mechanism to move, thereby causing the guide sleeve to swing relative to the mounting plate around its axis of rotation, thus changing the insertion angle of the tamping rod relative to the vertical direction.

[0007] Furthermore, a rotating sleeve is rotatably mounted on the mounting frame, and a mounting plate is mounted on the rotating sleeve; the top of the rotating sleeve is provided with a plurality of toothed annular grooves continuously distributed along the circumference, and a plurality of vertical guide grooves communicating with the toothed annular grooves; the driving mechanism has an output shaft that reciprocates vertically, and a plurality of levers are provided on the output shaft; the levers cooperate with the vertical guide grooves to restrict the rotation of the rotating sleeve when the output shaft moves vertically; and when the output shaft retracts to a preset position, the levers cooperate with the toothed annular grooves to push the rotating sleeve to rotate through a preset angle.

[0008] Furthermore, the swing mechanism includes a rotating shaft at one end of the guide sleeve and a strip groove at the other end. An eccentric shaft extends into the strip groove and is eccentrically fixed to the rotating disk. The rotating disk is connected to the output shaft of the indexing mechanism.

[0009] Furthermore, a compensation connection mechanism is provided between the drive mechanism and the tamping rod to compensate for displacement changes caused by the swing of the guide sleeve.

[0010] Furthermore, the compensation connection mechanism includes an arc-shaped guide block fixed to the output end of the drive mechanism with the guide sleeve shaft as the center. An arc-shaped guide groove is formed on the arc-shaped guide block. The top of the tamping rod is connected to a slide block, and the slide block moves along the arc-shaped guide groove.

[0011] Furthermore, the mounting frame is provided with a circular guide rail; the mounting plate is equipped with guide wheels that roll in cooperation with the circular guide rail; the guide wheels roll along the circular guide rail to support and guide the mounting plate.

[0012] Furthermore, the arc-shaped guide block is provided with a variable-diameter arc-shaped guide groove, and the top of the tamping rod is provided with a sliding pin that extends into the variable-diameter arc-shaped guide groove. The radius of the variable-diameter arc-shaped guide groove gradually increases along the direction of the guide sleeve deviating from the center, so that the tamping rod has a larger extension stroke when the guide sleeve deviates from the center position.

[0013] Furthermore, gears with different numbers of teeth can be detachably mounted on the mounting plate. The gears mesh with the gear ring, and the gear shaft is coaxially fixed or connected to the input shaft of the indexing mechanism, so as to change the number of input revolutions when the input end of the indexing mechanism rotates one revolution relative to the mounting plate by changing the gears with different numbers of teeth.

[0014] Furthermore, the rotating disk is provided with multiple eccentric holes, and the distance between the multiple eccentric holes and the center of the rotating disk is different; the eccentric shaft is detachably installed in any of the eccentric holes, so as to adjust the swing range of the guide sleeve by changing the eccentricity of the eccentric shaft relative to the center of the rotating disk.

[0015] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the invention.

[0016] The beneficial effects of this invention are as follows: This application, through a combination of a first lifting mechanism, a second lifting mechanism, an inclined guide sleeve, a tamping rod, a sliding block, a rotating sleeve, a lever, a toothed annular groove, a gear ring mechanism, a cam indexing mechanism, and an arc-shaped guide block, enables the tamping rod to complete vertical height adjustment, inclined insertion, direction maintenance, return indexing, and multi-directional tamping under the drive of a single or fewer power sources. This improves the consistency of tamping depth, tamping direction, and tamping sequence, making the concrete slump testing process more standardized, reducing human error, and improving the stability and repeatability of test results.

[0017] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more easily understood, specific embodiments of the present invention are described below. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the tamping assembly structure according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the tamping assembly according to an embodiment of the present invention after removing the mounting frame and the drive mechanism; Figure 4 This is a schematic diagram of the structure of a rotating sleeve according to an embodiment of the present invention; Figure 5 This is an exploded structural diagram of the rotating sleeve according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of a rotating disk according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the internal structure of an indexing mechanism according to an embodiment of the present invention.

[0019] Figure label: 1. Workbench; 2. First lifting mechanism; 3. Second lifting mechanism; 4. Slump cone; 5. Tamping assembly; 501. Top plate; 502. Support; 503. Drive mechanism; 504. Rotating sleeve; 505. Circular guide rail; 506. Guide wheel; 507. Vertical plate; 508. Arc-shaped guide block; 509. Horizontal plate; 510. Guide sleeve; 511. Rotary disk; 512. Rotating shaft; 513. Variable diameter arc-shaped guide groove; 514. Sliding pin; 515. Gear ring; 516. Gear; 517. Eccentric hole; 518. Eccentric shaft; 519. Indexing mechanism; 520. Arc-shaped conjugate cam; 521. Indexing turntable; 5041, Cylindrical sleeve; 5042, Metal sleeve; 5043, Lever; 5044, Toothed annular groove; 5045, Vertical guide groove. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). When the specific posture changes, the directional indications will also change accordingly.

[0022] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0025] To better understand the purpose, function, and specific design of this invention, the invention will be described in further detail below with reference to the accompanying drawings.

[0026] This invention provides an engineering quality testing device, including a workbench 1, on which a first lifting mechanism 2 and a second lifting mechanism 3 are installed; as shown Figure 1 As shown, the workbench 1 can be a metal frame structure with sufficient strength, with a metal plate fixed on the top to support the first lifting mechanism 2, the second lifting mechanism 3 and the slump cylinder 4, providing a planar platform for slump detection. The first lifting mechanism 2 and the second lifting mechanism 3 can be driven by a screw drive combined with a motor, hydraulic cylinder or pneumatic cylinder.

[0027] The first lifting mechanism 2 is used to adjust the height of the tamping assembly 5; the second lifting mechanism 3 is used to adjust the height of the slumping cylinder 4. The tamping assembly 5 includes a mounting frame, a tamping rod, and a drive mechanism 503 for driving the extension and retraction of the tamping rod. The mounting frame can be a U-shaped or L-shaped metal bracket, which is fixed to the moving platform of the first lifting mechanism 2 by bolts. The tamping rod can be a solid or hollow metal rod, one end of which is connected to the drive mechanism 503. The drive mechanism 503 can be a linear motor or a crank-connecting rod mechanism driven by a motor, which causes the tamping rod to extend and retract through reciprocating motion. For example, in this embodiment, the drive mechanism 503 is a cylinder.

[0028] An installation plate is rotatably mounted on the mounting frame, and a guide sleeve 510 is rotatably mounted on the installation plate. The tamping rod passes through the guide sleeve 510. The installation plate is rotatably connected to the mounting frame. The specific connection method can be a rotatable connection through a bearing seat or other transmission structure. If a bearing seat is used for the rotatable connection, it can be driven to rotate by an external drive mechanism 503. The installation plate is a plate structure, on which the guide sleeve 510 is mounted, and the tamping rod can move along the axial direction of the guide sleeve 510.

[0029] The drive mechanism 503 is used to drive the tamping rod to extend and retract axially along the guide sleeve 510. The output end of the drive mechanism 503 can be directly connected to the top of the tamping rod, for example, through a threaded connection or a pin connection. When the drive mechanism 503 is working, the linear reciprocating motion it generates is directly transmitted to the tamping rod, so that the tamping rod extends and retracts vertically under the guidance of the guide sleeve 510.

[0030] A gear ring 515 is fixedly mounted on the mounting frame, and a gear 516 meshing with the gear ring 515 is mounted on the mounting plate. The gear 516 is connected to the input end of the indexing mechanism 519. The gear ring 515 can be an internal or external gear ring, fixed to the top plate 501 of the mounting frame by welding or bolting. A bearing seat can be provided on the mounting plate, and the axle of the gear 516 is rotatably connected to the mounting plate through the bearing seat. The gear 516 maintains meshing with the fixed gear ring 515, and the axle of the gear 516 extends out to serve as the input shaft of the indexing mechanism 519.

[0031] An output end of the indexing mechanism 519 is connected to a swinging mechanism, and the swinging mechanism is in transmission connection with the guide sleeve 510, so that during rotation of the mounting plate, the gear 516 and the gear ring 515 generate relative rotation and drive the indexing mechanism 519 to perform cumulative input; after the indexing mechanism 519 reaches a preset input amount, it drives the swinging mechanism to act, thereby driving the guide sleeve 510 to change the guiding direction. The indexing mechanism 519 can be a basic ratchet mechanism or cam mechanism, an input end of which receives rotation from the gear 516. When the indexing mechanism 519 accumulates to a preset rotation amount, an output end thereof generates an intermittent rotation or linear motion, thereby driving the guide sleeve 510 to swing relative to the mounting plate around its rotating shaft 512, so as to change the insertion angle of the tamping rod relative to the vertical direction.

[0032] Specifically, when slump detection is required, the slump cone 4, the tamping rod and other components are rinsed with clean water first, then the second lifting mechanism 3 is driven to press and hold the slump cone 4 on the worktable 1, concrete is manually fed into the slump cone 4 in three times, and a tamping action is performed on the concrete in the slump cone 4 for 25 times each time; specifically, when performing the tamping action, the first lifting mechanism 2 is first driven to lower the tamping assembly 5, so that the tamping rod extends into the slump cone 4 and the tamping rod is slightly higher than the concrete surface, then the driving mechanism 503 is started, the driving mechanism 503 drives the tamping rod to extend and retract along the axial direction of the guide sleeve 510, and simultaneously rotates the mounting plate. The rotation of the mounting plate can be driven by an external driving mechanism 503 such as a motor. During rotation of the mounting plate, the gear 516 and the gear ring 515 generate relative rotation and drive the indexing mechanism 519 to perform cumulative input; after the indexing mechanism 519 reaches a preset input amount, it drives the swinging mechanism to act, thereby driving the guide sleeve 510 to change the guiding direction. During the continuous tamping action of the tamping rod, the insertion direction of the tamping rod can be automatically changed according to a preset beat without an additional control system and an independent driving source.

[0033] Further, as Figure 1 shown, the mounting frame body includes a top plate 501 and an L-shaped bracket, the top plate 501 is fixed at the top of the L-shaped bracket, a side portion of the L-shaped bracket is connected to a moving block of the first lifting mechanism 2, a bracket 502 is mounted on the top plate 501, the bracket 502 is in a shape of "Ω", the driving mechanism 503 is mounted at a top of the bracket 502, and an output shaft of the driving mechanism 503 passes through the bracket 502 and the top plate 501 to be connected to the tamping rod.

[0034] Further, as Figure 2 , Figure 3As shown, the mounting plate is L-shaped and includes a vertical plate 507 and a horizontal plate 509. The vertical plate 507 is used to mount the rotating shaft 512, the indexing mechanism 519, the rotating disk 511, and the guide sleeve 510. The horizontal plate 509 is used to connect with the rotating sleeve 504. To avoid obstruction, the indexing mechanism 519, the rotating shaft 512, the rotating disk 511, and the guide sleeve 510 are located on both sides of the vertical plate 507.

[0035] Furthermore, such as Figure 7 As shown, the indexing mechanism 519 is a cam indexing mechanism 519, including a housing. An arc-shaped conjugate cam 520 and an indexing turntable 521 are rotatably mounted inside the housing. The arc-shaped conjugate cam 520 and the indexing turntable 521 rely on a conjugate meshing pair formed by a radial needle roller on the outer edge to transmit intermittent rotation. The arc-shaped conjugate cam 520 is rigidly fixed to the input spindle by a key / bolt to realize torque input. The indexing turntable 521 is rigidly fixed to the output spindle by a key / bolt to realize torque output.

[0036] In some embodiments, such as Figure 4 - Figure 5 As shown, a rotating sleeve 504 is rotatably mounted on the mounting bracket, and a mounting plate is mounted on the rotating sleeve 504. The rotating sleeve 504 is a cylindrical structure that can rotate about its axis, and its exterior forms a rotational fit with the mounting bracket body, for example, by means of a bearing to achieve smooth rotation. The mounting plate is fixedly or detachably mounted on the rotating sleeve 504, so that the overall rotation of the mounting plate can be achieved by controlling the rotation of the rotating sleeve 504.

[0037] The top of the rotating sleeve 504 is provided with a plurality of toothed annular grooves 5044 continuously distributed along the circumference, and a plurality of vertical guide grooves 5045 communicating with the toothed annular grooves 5044; the toothed annular grooves 5044 are grooves evenly arranged along the circumference of the rotating sleeve 504, used to define the angle of each step rotation of the rotating sleeve 504, and the vertical guide grooves 5045 are grooves in the vertical direction that communicate with these annular grooves, which provide a channel and guide for the vertical movement of the lever 5043 described later.

[0038] The drive mechanism 503 has an output shaft that reciprocates vertically, and a plurality of levers 5043 are provided on the output shaft. The output shaft is a rod capable of vertical movement, on which levers 5043 that match the groove structure on the rotating sleeve 504 are fixedly or detachably mounted, and their number and spacing correspond to the distribution of the vertical guide grooves 5045 and the toothed annular grooves 5044 on the rotating sleeve 504.

[0039] The lever 5043 cooperates with the vertical guide groove 5045 to restrict the rotation of the rotating sleeve 504 when the output shaft moves vertically; and when the output shaft retracts to the preset position, the lever 5043 cooperates with the toothed annular groove 5044 to push the rotating sleeve 504 to rotate through the preset angle.

[0040] When the tamping rod is in operation, the lever 5043 engages with the vertical guide groove 5045 to effectively lock the rotating sleeve 504, preventing accidental rotation and ensuring the stability of the tamping process. When the output shaft retracts to the upper part, the lever 5043 meshes with the toothed annular groove 5044. The action of the lever 5043 precisely pushes the rotating sleeve 504 to rotate through a preset angle, thereby achieving precise indexing rotation of the mounting plate. That is, when the tamping rod is inserted into the concrete for tamping, it will not rotate. Only when the tamping rod retracts above the concrete surface will the lever 5043 cause the rotating sleeve 504 to rotate by a preset angle, preventing lateral dragging inside the concrete and ensuring that the reversing action does not interfere with the testing process.

[0041] Furthermore, in one specific embodiment, the rotating sleeve 504 includes a cylindrical sleeve body 5041, with a bearing sleeved on the outside of the cylindrical sleeve body 5041, which is rotatably connected to the mounting frame through the bearing. The inner circumferential surface of the cylindrical sleeve body 5041 is provided with a toothed annular groove 5044 and a vertical guide groove 5045. A metal sleeve 5042 is fixed on the output shaft of the drive mechanism 503, and a plurality of levers 5043 are fixed on the metal sleeve 5042. The levers 5043 are perpendicular to the axial direction of the metal sleeve 5042. It should be noted that, due to the use of the toothed annular groove 5044, each tooth corresponds to a fixed angle. For example, 6 teeth correspond to 60°, 8 teeth correspond to 45°, and 12 teeth correspond to 30°.

[0042] In some embodiments, such as Figure 2 , Figure 3 , Figure 6As shown, the swing mechanism includes a rotating shaft 512 at one end of the guide sleeve 510. One end of the guide sleeve 510 is rotatably connected to the mounting plate via the rotating shaft 512. The rotating shaft 512 serves as the fulcrum for the swing of the guide sleeve 510, allowing the guide sleeve 510 to swing around its axis at a limited angle. The other end of the guide sleeve 510 is provided with a strip groove, into which an eccentric shaft 518 extends. The eccentric shaft 518 is a shaft whose axis is offset from its rotation center. The eccentric shaft 518 is eccentrically fixed to the rotating disk 511, which is connected to the indexing machine. The output shaft of the indexing mechanism 519 is connected, and the rotating disk 511 receives the rotational power of the indexing mechanism 519 through the connection with the output shaft of the indexing mechanism 519. The rotation of the rotating disk 511 drives the eccentric shaft 518 to perform circumferential motion, which in turn drives the guide sleeve 510 to swing. The strip groove provides compensation space for the eccentric shaft 518, so that the intermittent rotational motion output by the indexing mechanism 519 can be smoothly converted into the swinging motion of the guide sleeve around the rotating shaft 512. While ensuring the reversing function of the guide sleeve, motion interference and jamming are avoided, and the stability and reliability of the reversing process are improved.

[0043] In some embodiments, such as Figure 2 - Figure 3 As shown, a compensation connection mechanism is provided between the drive mechanism 503 and the tamping rod to compensate for the displacement changes caused by the swing of the guide sleeve 510. This ensures that the linear motion of the drive mechanism 503 can be smoothly and effectively transmitted to the tamping rod. At the same time, it allows the connection point between the tamping rod and the drive mechanism 503 to be adjusted accordingly when the guide sleeve 510 swings, avoiding interference, jamming, or stress concentration caused by rigid connection. For example, a universal joint, ball joint, or a guide structure that allows relative sliding or rolling can be used to adapt to the dynamic changes of the connection point in space while maintaining force transmission. When the guide sleeve swings, the arc-shaped guide block 508 automatically compensates for the position change, and the drive mechanism 503 does not need to be adjusted. While realizing the switching of the tamping direction, it can still maintain the stable extension and retraction of the tamping rod, improve the overall reliability of the mechanism, and the movement direction of the tamping rod is always consistent with the length direction of the rod body.

[0044] In some embodiments, such as Figure 2 - Figure 3 As shown, the compensation connection mechanism includes an arc-shaped guide block 508 fixed to the output end of the drive mechanism 503 with the guide sleeve 510 rotating shaft 512 as the center. The top of the tamping rod is connected to a slide block. An arc-shaped guide groove is formed on the arc-shaped guide block 508. The slide block moves along the arc-shaped guide groove. The arc-shaped guide block 508 can be a groove, flange, or track with a specific curvature. The slide block is the component that connects the top of the tamping rod and the arc-shaped guide block 508. The slide block can take various forms, such as a slider with rollers, a sliding block made of low-friction material, or a structure that complements the shape of the guide rail. It is used to decouple the axial movement of the tamping rod from the swinging movement of the guide sleeve 510, allowing the tamping rod to freely extend and retract while swinging.

[0045] In some embodiments, such as Figure 2 - Figure 3 As shown, a circular guide rail 505 is provided on the mounting frame. The circular guide rail 505 on the mounting frame can be an annular groove, flange, or track, which is fixed or integrated on the mounting frame. A guide wheel 506 is mounted on the mounting plate, which rolls in cooperation with the circular guide rail 505. The guide wheel 506 is a rolling component mounted on the bottom of the mounting plate, which contacts and rolls along the circular guide rail 505. These guide wheels 506 can be ball bearings, roller bearings, or wheels with specific profiles (such as V-grooves or U-grooves). The guide wheel 506 rolls along the circular guide rail 505 to support and guide the mounting plate. The rolling cooperation between the guide wheel 506 and the circular guide rail 505 allows the mounting plate to obtain stable vertical support and precise horizontal guidance during rotation. When the guide wheel 506 rolls on the circular guide rail 505, it can effectively bear the weight of the mounting plate and the components above it, preventing the mounting plate from tilting or wobbling.

[0046] In some embodiments, such as Figure 2 - Figure 3 As shown, the arc-shaped guide block 508 is provided with a variable-diameter arc-shaped guide groove 513, and the top of the tamping rod is provided with a sliding pin 514 extending into the variable-diameter arc-shaped guide groove 513. The radius of the variable-diameter arc-shaped guide groove 513 gradually increases along the direction of the guide sleeve 510 away from the center, so that the tamping rod has a larger extension stroke when the guide sleeve 510 is away from the center position. The arc-shaped guide block 508 is fixed to the output end of the drive mechanism 503 and forms an arc structure with the guide sleeve 510 rotating shaft 512 as the center. On the surface or inside of the arc-shaped guide block 508, a variable-diameter arc-shaped guide groove 513 is processed or formed. The radius of curvature of the variable-diameter arc-shaped guide groove 513 gradually increases along the direction of the guide sleeve 510 away from the center position. When the sliding pin 514 at the top of the tamping rod slides in the guide groove, its movement trajectory will be guided accordingly, so that the tamping rod can obtain a larger effective extension stroke than the center position when it is away from the center position.

[0047] Furthermore, such as Figure 3 As shown, the variable-diameter arc-shaped guide groove 513 includes a first arc-shaped section that is concave upward in the middle and a second arc-shaped section that is concave downward on both sides. When the sliding pin 514 at the top of the tamping rod slides from the middle to both sides, it will push the tamping rod to slide downward. Therefore, when the tamping rod slides to the side and is inclined, the tamping depth will increase. This ensures that when the output length of the drive mechanism 503 is fixed, the tamping depth of the tamping rod is compensated by the variable-diameter arc-shaped guide groove 513. When the tamping rod is in a vertical state, the length of the tamping rod is reduced accordingly, so that the tamping depth is adapted to the thickness of the concrete to be tamped. The specific compensation length is determined by the deflection angle of the tamping rod and the actual tamping depth.

[0048] In some embodiments, such as Figure 3 As shown, gears 516 with different numbers of teeth are detachably mounted on the mounting plate. The gears 516 mesh with the gear ring 515, and the gear shaft is coaxially fixed or connected to the input shaft of the indexing mechanism 519. By changing the gears 516 with different numbers of teeth, the input number of revolutions when the input end of the indexing mechanism 519 rotates one revolution relative to the mounting plate can be changed. For example, when more precise or more frequent oscillation of the guide sleeve 510 is required, a gear 516 with fewer teeth can be selected to increase the input of the indexing mechanism 519 under the same rotation of the mounting plate, thereby speeding up the operation frequency of the oscillation mechanism or increasing the single oscillation angle. Conversely, when slower or larger step oscillation is required, a gear 516 with more teeth can be selected.

[0049] In some embodiments, such as Figure 6 As shown, the rotating disk 511 is provided with multiple eccentric holes 517. On the surface of the rotating disk 511, with the center of the rotating disk 511 as a reference, a series of holes at different positions are formed. For example, multiple holes distributed on concentric arcs or holes distributed on arcs of different radii can be designed to form a series of preset eccentricity options. The distance between the multiple eccentric holes 517 and the center of the rotating disk 511 is different. The eccentric shaft 518 is detachably installed in any of the eccentric holes 517 so as to adjust the swing range of the guide sleeve 510 by changing the eccentricity of the eccentric shaft 518 relative to the center of the rotating disk 511.

[0050] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. In the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An engineering quality testing device, characterized in that, The device includes a workbench, on which a first lifting mechanism and a second lifting mechanism are mounted. The first lifting mechanism is used to adjust the height of the tamping assembly; the second lifting mechanism is used to adjust the height of the slump cylinder. The tamping assembly includes a mounting frame, a tamping rod, and a drive mechanism for extending and retracting the tamping rod. A mounting plate is rotatably mounted on the mounting frame, and a guide sleeve is rotatably mounted on the mounting plate. The tamping rod passes through the guide sleeve. The drive mechanism is used to drive the tamping rod to extend and retract axially along the guide sleeve. A gear ring is fixedly mounted on the mounting frame, and a gear meshing with the gear ring is mounted on the mounting plate. The gear is connected to the input end of an indexing mechanism. The output end of the indexing mechanism is connected to a swing mechanism, which is connected to the guide sleeve via a transmission connection. During the rotation of the mounting plate, the gear and gear ring rotate relative to each other, driving the indexing mechanism to accumulate input. After the indexing mechanism reaches a preset input amount, it drives the swing mechanism to move, thereby causing the guide sleeve to swing relative to the mounting plate around its axis of rotation, thus changing the insertion angle of the tamping rod relative to the vertical direction.

2. The engineering quality testing equipment according to claim 1, characterized in that, A rotating sleeve is rotatably mounted on the mounting frame, and a mounting plate is mounted on the rotating sleeve. The top of the rotating sleeve is provided with a plurality of toothed annular grooves continuously distributed along the circumference, and a plurality of vertical guide grooves communicating with the toothed annular grooves. The driving mechanism has an output shaft that reciprocates vertically, and a plurality of levers are provided on the output shaft. The levers cooperate with the vertical guide grooves to restrict the rotation of the rotating sleeve when the output shaft moves vertically. When the output shaft retracts to a preset position, the levers cooperate with the toothed annular grooves to push the rotating sleeve to rotate through a preset angle.

3. The engineering quality testing equipment according to claim 1, characterized in that, The swing mechanism includes a rotating shaft at one end of the guide sleeve and a strip groove at the other end. An eccentric shaft extends into the strip groove and is eccentrically fixed to the rotating disk. The rotating disk is connected to the output shaft of the indexing mechanism.

4. The engineering quality testing equipment according to claim 1, characterized in that, A compensation connection mechanism is provided between the drive mechanism and the tamping rod to compensate for the displacement changes caused by the swing of the guide sleeve.

5. The engineering quality testing equipment according to claim 4, characterized in that, The compensation connection mechanism includes an arc-shaped guide block fixed to the output end of the drive mechanism with the guide sleeve shaft as the center. An arc-shaped guide groove is formed on the arc-shaped guide block. The top of the tamping rod is connected to a slide block, and the slide block moves along the arc-shaped guide groove.

6. The engineering quality testing equipment according to claim 1, characterized in that, The mounting frame is provided with a circular guide rail; the mounting plate is equipped with guide wheels that roll in cooperation with the circular guide rail; the guide wheels roll along the circular guide rail to support and guide the mounting plate.

7. The engineering quality testing equipment according to claim 5, characterized in that, The arc-shaped guide block is provided with a variable-diameter arc-shaped guide groove, and the top of the tamping rod is provided with a sliding pin that extends into the variable-diameter arc-shaped guide groove. The radius of the variable-diameter arc-shaped guide groove gradually increases along the direction of the guide sleeve deviating from the center, so that the tamping rod has a larger extension stroke when the guide sleeve deviates from the center position.

8. The engineering quality testing equipment according to claim 1, characterized in that, The mounting plate is detachably mounted with gears of different numbers of teeth. The gears mesh with the gear ring, and the gear shaft is coaxially fixed or connected to the input shaft of the indexing mechanism, so as to change the number of input revolutions when the input end of the indexing mechanism rotates one revolution relative to the mounting plate by changing the gears of different numbers of teeth.

9. The engineering quality testing equipment according to claim 1, characterized in that, The rotating disk is provided with multiple eccentric holes, and the distance between the multiple eccentric holes and the center of the rotating disk is different; the eccentric shaft is detachably installed in any of the eccentric holes so as to adjust the swing range of the guide sleeve by changing the eccentricity of the eccentric shaft relative to the center of the rotating disk.

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