Cement mortar fluidity tester

Abstract

The invention relates to the technical field of cement mortar fluidity measurement, in particular to a cement mortar fluidity tester which comprises a tester body, the tester body comprises a mounting box, and a clamping mechanism used for clamping the side wall of a jumping table top is arranged on the bottom end face of the mounting box; a lower mounting cylinder is rotationally arranged at the center of the mounting box, the bottom end part of the lower mounting cylinder extends out of the mounting box, the bottom end part, extending out of the mounting box, of the lower mounting cylinder is connected with a strip-shaped plate, and a measuring mechanism for measuring the fluidity of cement mortar is arranged at the strip-shaped plate. The installation reference and the center of the jumping table top are automatically coaxial, and displacement deviation does not exist; when the diameter of a cement round cake is measured, the measuring rod is directly in mechanical contact with the edge of the round cake without manual visual judgment; the light path distance between the laser range finder and the reflector is directly equal to the distance between the measuring rods, and the central reference does not need to be determined manually.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cement mortar fluidity measurement, in particular to a cement mortar fluidity tester. BACKGROUND

[0002] Cement mortar fluidity is one of the core indicators for evaluating the working performance of cement, and is directly related to the mixing, transportation, pouring and compacting effects of concrete, and has an important influence on the construction quality and structural safety of construction projects. At present, the industry generally uses the cement mortar fluidity tester (commonly known as "jump table") to complete the mortar fluidity performance test according to GB / T 2419-2005 "Determination method of cement mortar fluidity". The core process is: the periodic jumping of the jump table makes the cement mortar form an expanding pie on the table, and then the expanding diameter of the pie is measured to quantify the fluidity index.

[0003] In the above test process, the measurement accuracy of the pie diameter directly determines the reliability of the fluidity result, and the current mainstream measurement method still relies on traditional manual measurement tools such as vernier caliper and steel ruler. This kind of measurement method needs to be completed by the operator on the jump table, including positioning, reading and data processing. Although it has certain advantages in equipment cost, it exposes many unavoidable shortcomings in actual application, which are specifically reflected in the following aspects:

[0004] Firstly, the measurement positioning accuracy is low and the reference consistency is poor. The edge of the pie formed by the expansion of the cement mortar often has an irregular rough area. When measuring with a vernier caliper, the operator needs to subjectively judge the "effective edge" of the pie as the starting point of measurement. The judgment standard of different operators is different, and "visual deviation" is easy to occur. At the same time, when measuring the diameters in two perpendicular directions, the geometric center of the pie needs to be manually determined as the reference. The deviation of the center positioning will directly lead to the fact that the two measurement directions are not strictly perpendicular, further amplifying the measurement error. Relevant data shows that this kind of human positioning error can make the final fluidity result deviate by more than 5mm, which exceeds the allowable error range of parallel test specified in the standard.

[0005] Secondly, the cumulative human operation error is obvious. The traditional tool measurement needs to go through multiple steps such as "finding the edge - aligning the scale - reading and recording - calculating the average". Each link may introduce error: the reading of the vernier caliper needs the operator to estimate the next place of the smallest scale, and the reading habit of different personnel will cause reading deviation; the slight shaking of the hand during the measurement process may make the caliper not parallel to the table, causing "inclined measurement" and leading to the measurement value being too large.

[0006] Third, when using vernier calipers, each sample requires at least two diameter measurements and data calculations, which is cumbersome and time-consuming, with each sample measurement taking 1-2 minutes. In addition, to ensure data reliability, in some scenarios, two operators are required to cross-check the data, further increasing labor and time costs, making it difficult to meet the industry's demand for efficient testing. Summary of the Invention

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution.

[0008] A cement mortar flowability tester includes a tester body, which includes a mounting box. The bottom surface of the mounting box is provided with a clamping mechanism for clamping the side wall of a tabletop. A lower mounting cylinder is rotatably mounted at the center of the mounting box, with its bottom end extending out of the box. A strip plate is connected to the bottom end of the lower mounting cylinder extending out of the box. A measuring mechanism for measuring the flowability of cement mortar is provided at the strip plate. The measuring mechanism includes a rangefinder mounting base and a reflector mounting base. Both the rangefinder mounting base and the reflector mounting base are equipped with [equipment details related to the strip plate]. A square through hole with clearance fits the strip plate. The rangefinder mounting base and the reflector mounting base are respectively set at both ends of the strip plate along its length and can slide on the strip plate. A laser rangefinder is installed at the rangefinder mounting base and a reflector is installed at the reflector mounting base. A measuring rod is installed at the bottom end of both the rangefinder mounting base and the reflector mounting base. The bottom end of the measuring rod is used to move to the edge of the cement disc on the tabletop. The distance between the laser rangefinder and the reflector is equal to the distance between the measuring rod at the rangefinder mounting base and the measuring rod at the reflector mounting base.

[0009] As a preferred embodiment of the present invention, the mounting box is provided with a mounting cavity, and a mounting cavity through hole that is clearance-fitted with the lower mounting cylinder is provided at the center of the mounting cavity.

[0010] As a preferred embodiment of the present invention, the upper end of the mounting cavity is provided with a cover plate for sealing the mounting cavity, and a cover plate through hole is provided at the center of the cover plate. The top end of the lower mounting cylinder expands outward to form an upper flange of the lower mounting cylinder. The bottom end face of the upper flange of the lower mounting cylinder is provided with a plurality of first slots distributed circumferentially thereon. An adjusting cylinder is rotatably provided in the cover plate through hole, which is in clearance fit with the upper flange of the lower mounting cylinder. The bottom end of the adjusting cylinder contracts inward to form a lower flange of the adjusting cylinder in clearance fit with the lower mounting cylinder. The upper end face of the lower flange of the adjusting cylinder is provided with a plurality of first teeth. The first teeth are used to cooperate with the first slots so that the lower mounting cylinder can rotate with the rotation of the adjusting cylinder.

[0011] As a preferred embodiment of the present invention, the bottom wall of the mounting cavity is provided with a plurality of second slots evenly distributed circumferentially along the through hole of the mounting cavity, the bottom end of the lower mounting cylinder expands outward to form a lower flange of the lower mounting cylinder, the bottom end face of the lower flange of the lower mounting cylinder is provided with a plurality of second teeth, and the mounting cavity is provided with a spring for inserting the second teeth into the second slots to fix the lower mounting cylinder.

[0012] As a preferred embodiment of the present invention, the upper end of the adjusting cylinder extends out of the cover plate through hole, and a handwheel is provided at the end of the adjusting cylinder extending out of the cover plate through hole.

[0013] As a preferred embodiment of the present invention, the clamping mechanism includes two support plates disposed at the bottom end of the mounting box. The two support plates are disposed opposite to each other along the length direction of the mounting box. A first slide rail is provided at the bottom end face of the mounting box, and a first slider that cooperates with the first slide rail is provided at the support plate. A clamping block is connected to the bottom end of the support plate, and an arc-shaped groove that is clearance-fitted with the edge of the tabletop. The mounting box is provided with a driving mechanism for driving the support plates to move.

[0014] As a preferred embodiment of the present invention, the bottom wall of the mounting cavity is provided with two sets of strip-shaped through holes. The driving mechanism includes a driving plate slidably disposed in the strip-shaped through holes. The bottom end of the driving plate extends out of the strip-shaped through holes. A connecting seat is provided at the bottom end of the driving plate extending out of the strip-shaped through holes. The connecting seat is bolted to the support plate. The bottom wall of the mounting cavity is provided with a second slide rail located at the strip-shaped through holes. The side wall of the driving plate is provided with an L-shaped plate. One end of the L-shaped plate is connected to the driving plate. The other end of the L-shaped plate is provided with a second slider that cooperates with the second slide rail. An upper mounting cylinder is provided in the mounting cavity and sleeved on the outside of the adjusting cylinder. A rack is provided on the upper side wall of the driving plate. A toothed ring is provided at the top end of the upper mounting cylinder and meshes with the rack. The upper end of the spring abuts against the toothed ring, and the lower end of the spring abuts against the lower flange of the lower mounting cylinder.

[0015] As a preferred embodiment of the present invention, the bottom end of the upper mounting cylinder is tapered inward to form a lower flange of the upper mounting cylinder that is in clearance fit with the lower mounting cylinder. The lower end face of the lower flange of the adjusting cylinder is provided with a plurality of third locking teeth, and the upper end face of the lower flange of the upper mounting cylinder is provided with a plurality of third locking grooves. The third locking teeth are used to cooperate with the third locking grooves so that the upper mounting cylinder can rotate with the rotation of the adjusting cylinder.

[0016] As a preferred embodiment of the present invention, the bottom end face of the cover plate is provided with a plurality of fourth slots distributed circumferentially along the through holes of the cover plate, and the toothed ring is provided with a plurality of evenly distributed fourth teeth. The fourth teeth are used to abut into the fourth slots under the action of spring force to fix the upper mounting cylinder.

[0017] As a preferred embodiment of the present invention, both the rangefinder mounting base and the reflector mounting base are provided with threaded holes communicating with the square through holes. A wing bolt is provided in the threaded hole, and the end of the wing bolt is used to abut against the side wall of the strip plate to fix the rangefinder mounting base and the reflector mounting base.

[0018] The beneficial effects of this invention are as follows:

[0019] 1. The installation reference of this invention is automatically coaxial with the center of the tabletop, with no displacement deviation; when measuring the diameter of the cement disc, the measuring rod directly mechanically contacts the edge of the disc, eliminating the need for manual visual judgment; the optical path distance between the laser rangefinder and the reflector is directly equal to the distance between the measuring rods, eliminating the need for manual determination of the center reference.

[0020] 2. The laser rangefinder in this invention can automatically select the reading accuracy according to the usage situation, automatically collect data, eliminate manual estimation error, and better reduce data repeatability error; the measuring mechanism, through the structural constraints of the strip plate and square through hole, ensures that the measuring rod is perpendicular to the strip plate and the laser light path is parallel to the distance between the measuring rod, completely eliminating "tilted measurement".

[0021] 3. After the measuring mechanism is positioned, the laser rangefinder outputs data in real time, eliminating the need for manual reading and recording, thus significantly improving measurement efficiency. When switching measurement directions, the bar plate can be rotated and locked simply by "pulling-rotating-releasing" the handwheel, without the need to reposition the measuring mechanism, simplifying the multi-directional measurement process. A single person can complete the entire process of "equipment fixing-direction switching-measurement reading" without cross-checking, greatly reducing labor costs and meeting the needs of batch and high-efficiency testing. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the cement mortar flowability tester in Example 1;

[0023] Figure 2 This is a schematic diagram of the reflector mounting base in Example 1;

[0024] Figure 3 This is a cross-sectional view of the cement mortar fluidity tester in Example 1;

[0025] Figure 4 for Figure 3 Enlarged view of section A;

[0026] Figure 5 This is a schematic diagram of the mounting box in Example 1;

[0027] Figure 6 This is a schematic diagram of the drive plate and support plate in Example 1;

[0028] Figure 7This is a schematic diagram of the upper mounting cylinder in Example 1;

[0029] Figure 8 This is a schematic diagram of the cover plate in Example 1;

[0030] Figure 9 This is a schematic diagram of the lower mounting cylinder in Example 1;

[0031] Figure 10 This is a schematic diagram of the adjusting cylinder in Example 1.

[0032] The attached figures are labeled as follows:

[0033] 100. Measuring instrument body; 110. Mounting box; 120. Lower mounting cylinder; 130. Strip plate; 140. Rangefinder mounting base; 141. Laser rangefinder; 150. Reflector mounting base; 160. Measuring rod; 170. Cover plate; 180. Adjusting cylinder; 190. Handwheel; 1100. Support plate; 1110. First slide rail; 1120. Clamping block; 1130. Wing bolt; 210. Square through hole; 220. Reflector; 230. Threaded hole; 310. Mounting cavity; 320. Mounting cavity through hole; 330. Cover plate through hole; 340. Drive plate; 350. Connecting seat; 410. Upper flange of lower mounting cylinder; 420. First slot; 430. Lower flange of adjusting cylinder; 440. First locking tooth; 450. Second slot; 460. Lower flange of lower mounting cylinder; 470. Second locking tooth; 480. Spring; 490. Upper mounting cylinder; 4100. Third locking tooth; 510. Strip-shaped through hole; 520. Second slide rail; 610. First slider; 620. Arc-shaped groove; 630. L-shaped plate; 640. Second slider; 650. Rack; 710. Gear ring; 720. Lower flange of upper mounting cylinder; 730. Third slot; 740. Fourth locking tooth; 810. Fourth slot. Detailed Implementation

[0034] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are merely illustrative and not limiting of the invention.

[0035] Example 1, such as Figures 1-10As shown, this embodiment provides a cement mortar flowability tester, which specifically includes a tester body 100. The tester body 100 includes a mounting box 110, which has a mounting cavity 310 inside. The mounting cavity 310 has a mounting cavity through hole 320 at its center. A cover plate 170 for sealing is fitted to the upper end of the mounting cavity 310. The cover plate 170 has a cover plate through hole 330 at its center. A clamping mechanism for clamping the tabletop is provided on the bottom end face of the mounting box 110. A lower mounting cylinder 120 is rotatably mounted at the center of the mounting box 110. The bottom end of the lower mounting cylinder 120 extends out of the mounting cavity through hole 320 and is connected to a strip plate 130. A measuring mechanism for measuring the flowability of cement mortar is mounted on the strip plate 130. The mounting cavity 310 also has an upper mounting cylinder 490 sleeved on the outside of the adjusting cylinder 180, a spring 480 for providing elastic preload, and a driving mechanism for driving the clamping mechanism.

[0036] The top end of the lower mounting cylinder 120 expands outward to form an upper flange 410. The bottom surface of the upper flange 410 has multiple circumferentially distributed first grooves 420. The bottom end of the lower mounting cylinder 120 expands outward to form a lower flange 460. The bottom surface of the lower flange 460 has multiple second teeth 470. The lower mounting cylinder 120 is clearance-fitted with the mounting cavity through hole 320. The bottom wall of the mounting cavity 310 has multiple second grooves 450 evenly distributed circumferentially along the mounting cavity through hole 320. The lower end of the spring 480 abuts against the lower flange 460. In the initial state, the second teeth 470 and the second grooves 450 are fully engaged, thus fixing the lower mounting cylinder 120.

[0037] The adjusting cylinder 180 is rotatably mounted in the through hole 330 of the cover plate, and is clearance-fitted with the upper flange 410 of the lower mounting cylinder. The bottom end of the adjusting cylinder 180 contracts inward to form the lower flange 430 of the adjusting cylinder. The upper end face of the lower flange 430 of the adjusting cylinder is provided with multiple first locking teeth 440, and the lower end face is provided with multiple third locking teeth 4100. The upper end of the adjusting cylinder 180 extends out of the through hole 330 of the cover plate and is equipped with a handwheel 190. In the initial state, the first locking teeth 440 are fully engaged with the first locking groove 420, and the third locking teeth 4100 are fully engaged with the third locking groove 730 of the upper mounting cylinder 490. The adjusting cylinder 180 is synchronously fixed with the upper mounting cylinder 490 and the lower mounting cylinder 120 through double engagement.

[0038] The upper mounting cylinder 490 is sleeved on the outside of the adjusting cylinder 180, and its bottom end tapers inward to form a lower flange 720. The upper end face of the lower flange 720 is provided with multiple third slots 730. The top end of the upper mounting cylinder 490 is provided with a toothed ring 710, and the upper end of the spring 480 abuts against the toothed ring 710. The bottom end face of the cover plate 170 is provided with multiple fourth slots 810 distributed circumferentially along the through hole 330 of the cover plate, and the toothed ring 710 is provided with multiple evenly distributed fourth teeth 740. In the initial state, the fourth teeth 740 are fully engaged with the fourth slots 810 to fix the upper mounting cylinder 490.

[0039] The clamping mechanism includes two support plates 1100, which are arranged opposite each other along the length of the mounting box 110. The bottom surface of the mounting box 110 is provided with a first slide rail 1110, and the support plate 1100 is provided with a first slider 610 that cooperates with the first slide rail 1110. The bottom end of the support plate 1100 is connected to a clamping block 1120, and the clamping block 1120 is provided with an arc-shaped groove 620 that cooperates with the edge of the tabletop.

[0040] The driving mechanism includes a driving plate 340 that is slidably mounted in the strip-shaped through hole 510 on the bottom wall of the mounting cavity 310. The bottom end of the driving plate 340 extends out of the strip-shaped through hole 510 and is provided with a connecting seat 350, which is bolted to the support plate 1100. A second slide rail 520 is provided at the bottom wall of the mounting cavity 310 at the strip-shaped through hole 510. An L-shaped plate 630 is provided on the side wall of the driving plate 340. One end of the L-shaped plate 630 is connected to the driving plate 340, and the other end is provided with a second slider 640 that cooperates with the second slide rail 520. A rack 650 is provided on the upper side wall of the driving plate 340. The rack 650 meshes with a gear ring 710. When the upper mounting cylinder 490 rotates, it drives the driving plate 340 to move linearly through the gear ring 710.

[0041] The measuring mechanism includes a rangefinder mounting base 140 and a reflector mounting base 150, both of which have square through holes 210 that fit with the strip plate 130 with clearance. These holes are located at both ends of the strip plate 130 along its length and can slide along the strip plate 130. A laser rangefinder 141 is mounted on the rangefinder mounting base 140, and a reflector 220 is mounted on the reflector mounting base 150. Both the rangefinder mounting base 140 and the reflector mounting base 150 have measuring rods 160 at their bottom ends. The bottom end of the measuring rods 160 is used to move to the edge of the cement disc on the tabletop. Both the rangefinder mounting base 140 and the reflector mounting base 150 have threaded holes 230 that communicate with the square through holes 210. A wing bolt 1130 is mounted in the threaded hole 230, and the end of the wing bolt 1130 abuts against the side wall of the strip plate 130, thus fixing the rangefinder mounting base 140 and the reflector mounting base 150. The distance between the laser rangefinder 141 and the reflector 220 is equal to the distance between the two sets of measuring rods 160.

[0042] Before measurement, the measuring instrument body 100 needs to be fixed to the tabletop of the jumping table using the clamping mechanism. In the initial state, the first clasp 440 and the first slot 420, the third clasp 4100 and the third slot 730, the second clasp 470 and the second slot 450, and the fourth clasp 740 and the fourth slot 810 are all fully engaged, and the upper mounting cylinder 490 and the lower mounting cylinder 120 are simultaneously fixed.

[0043] When the measuring instrument body 100 is fixed to the tabletop of the jumping table, first press down on the handwheel 190 to drive the adjusting cylinder 180 to move downward along the axis. The spring 480 is compressed by the toothed ring 710 and undergoes compression deformation. At this time, the downward displacement of the adjusting cylinder 180 only acts on the upper mounting cylinder 490, causing the fourth locking tooth 740 of the toothed ring 710 to disengage from the fourth locking groove 810 of the cover plate 170, and the upper mounting cylinder 490 is released from fixation. During this process, the second locking tooth 470 of the lower mounting cylinder 120 is always engaged with the second locking groove 450, and the first locking tooth 440 of the adjusting cylinder 180 is always engaged with the first locking groove 420 of the lower mounting cylinder 120. The lower mounting cylinder 120 is always fixed to avoid displacement interference.

[0044] Rotating the handwheel 190 causes the adjusting cylinder 180 to rotate synchronously with the upper mounting cylinder 490 through the meshing relationship between the third locking tooth 4100 and the third locking groove 730. The gear ring 710 at the top of the upper mounting cylinder 490 meshes with the rack 650 of the drive plate 340, converting the rotational motion into the linear motion of the drive plate 340. The drive plate 340 drives the support plate 1100 to slide along the first slide rail 1110 through the connecting seat 350. The two clamping blocks 1120 move closer to each other, and the arc-shaped groove 620 fits against the edge of the jumping table, completing the precise clamping of the equipment and the jumping table.

[0045] When the handwheel 190 is released, the spring 480 returns to its original deformation and pushes the gear ring 710 upward, causing the upper mounting cylinder 490 and the adjusting cylinder 180 to return to their axial reset; the fourth retaining tooth 740 of the gear ring 710 re-engages fully with the fourth retaining groove 810, and the upper mounting cylinder 490 returns to its fixed state.

[0046] When it is necessary to rotate the strip plate 130 to switch the measurement direction, first pull the handwheel 190 upward, which will drive the adjusting cylinder 180 to move upward along the axis. The spring 480 will be stretched by the lower flange 460 of the lower mounting cylinder. At this time, the upward displacement of the adjusting cylinder 180 only acts on the lower mounting cylinder 120, so that the second locking tooth 470 of the lower flange 460 of the lower mounting cylinder disengages from the second locking groove 450 of the bottom wall of the mounting cavity 310, and the lower mounting cylinder 120 is released from fixation. During this process, the fourth locking tooth 740 of the upper mounting cylinder 490 is always engaged with the fourth locking groove 810, and the third locking tooth 4100 of the adjusting cylinder 180 is always engaged with the third locking groove 730 of the upper mounting cylinder 490. The upper mounting cylinder 490 is always fixed to prevent the clamping mechanism from loosening.

[0047] When the handwheel 190 is turned, the adjusting cylinder 180 rotates synchronously with the lower mounting cylinder 120 through the meshing relationship between the first locking tooth 440 and the first locking groove 420; the strip plate 130 at the bottom of the lower mounting cylinder 120 rotates together, and the measuring mechanism switches to a new measuring direction to meet the requirements of multi-directional diameter measurement.

[0048] After the direction adjustment is completed, release the handwheel 190, the spring 480 retracts and resets, pull the lower flange 460 of the lower mounting cylinder downward, the second locking tooth 470 re-engages fully with the corresponding second locking groove 450, and the lower mounting cylinder 120 returns to the fixed state.

[0049] When measuring the diameter of the cement disc, first loosen the butterfly bolt 1130, slide the rangefinder mounting base 140 and reflector mounting base 150 along the strip plate 130, so that the bottom ends of the two sets of measuring rods 160 respectively abut against the edge of the disc formed by the expansion of cement mortar. There is no need to manually determine the center reference of the disc, and positioning is achieved through mechanical contact.

[0050] Tighten the wing bolt 1130 so that its end abuts against the side wall of the strip plate 130. The rangefinder mounting base 140 and the reflector mounting base 150 remain in their current positions to ensure the fitting accuracy of the measuring rod 160 with the edge of the disc and to prevent displacement during the measurement process.

[0051] The laser rangefinder 141 emits a laser to the reflector 220 and directly reads the distance between them. This value is exactly equal to the distance between the two sets of measuring rods 160, which is the diameter of the cement mortar disc (flowability data) in the current measuring direction. No manual calculation or estimation is required; the data is output directly.

[0052] The cement mortar fluidity tester in this embodiment, through the above technical solution, can achieve the following beneficial effects:

[0053] 1. In traditional measurement methods, the "effective edge" and geometric center of the cement disc need to be determined manually. Different operators have different judgment standards, and the center positioning deviation leads to non-perpendicular measurement direction, resulting in large errors that easily exceed the standard allowable range. In this embodiment, the cement mortar flowability tester is automatically coaxial with the center of the table, with no displacement deviation. When measuring the diameter of the cement disc, the measuring rod 160 directly mechanically contacts the edge of the disc, eliminating the need for manual visual judgment. The optical path distance between the laser rangefinder 141 and the reflector 220 is directly equal to the distance between the measuring rods 160, eliminating the need for manual determination of the center reference.

[0054] 2. When measuring cement discs using tools such as vernier calipers, manual estimation of the next decimal place after the smallest scale is required, resulting in significant estimation errors. Hand tremors can easily cause "tilted measurement," further leading to overestimation of the measured value. The cumulative error from multiple stages significantly affects the reliability of the results. In this embodiment, the reading accuracy of the laser rangefinder 141 in the cement mortar flowability tester can be automatically selected according to the usage situation, automatically collecting data, eliminating manual estimation errors, and significantly reducing data repeatability errors. The measuring mechanism, through the structural constraints of the strip plate 130 and the square through hole 210, ensures that the measuring rod 160 is perpendicular to the strip plate 130 and that the laser beam path is parallel to the distance between the measuring rod 160 and the measuring rod 160, completely eliminating "tilted measurement."

[0055] 3. In traditional measurement methods, a single sample requires at least two diameter measurements, manual recording, and calculation of the average value; batch testing requires two operators for cross-checking, resulting in high labor costs and low efficiency. In this embodiment, the cement mortar flowability tester outputs data in real time via the laser rangefinder 141 after the measuring mechanism is positioned, eliminating the need for manual reading and recording, thus significantly improving measurement efficiency. When switching measurement directions, simply "pull-rotate-release" the handwheel 190 to rotate and lock the strip plate 130, without needing to reposition the measuring mechanism, simplifying the multi-directional measurement process. A single person can complete the entire process of "equipment fixing-direction switching-measurement reading" without cross-checking, greatly reducing labor costs and meeting the needs of efficient batch testing.

[0056] The working process of the cement mortar fluidity tester in this embodiment is as follows:

[0057] Step 1: Confirm that all components of the measuring instrument body 100 are intact. The first locking tooth 440 and the first locking slot 420, the third locking tooth 4100 and the third locking slot 730, the second locking tooth 470 and the second locking slot 450, and the fourth locking tooth 740 and the fourth locking slot 810 are all fully engaged. The spring 480 is not deformed or stuck. The laser rangefinder 141 and the reflector 220 are clean and unobstructed. Place the measuring instrument body 100 above the tabletop, aligning the arc-shaped groove 620 of the clamping block 1120 with the edge of the tabletop, ensuring that the center of the mounting box 110 is approximately coaxial with the center of the tabletop.

[0058] Step 2: Press down on the handwheel 190 to move the adjusting cylinder 180 downward along the axis. The spring 480 is compressed by the gear ring 710, and the fourth locking tooth 740 of the gear ring 710 disengages from the fourth locking groove 810 of the cover plate 170, and the upper mounting cylinder 490 is released from fixation. During this process, the second locking tooth 470 of the lower mounting cylinder 120 and the second locking groove 450, and the first locking tooth 440 of the adjusting cylinder 180 and the first locking groove 420 of the lower mounting cylinder 120 remain engaged, and the lower mounting cylinder 120 remains fixed.

[0059] Rotating the handwheel 190 causes the adjusting cylinder 180 to rotate synchronously with the upper mounting cylinder 490 through the engagement of the third locking tooth 4100 and the third locking groove 730. The gear ring 710 at the top of the upper mounting cylinder 490 engages with the rack 650 of the drive plate 340, converting the rotational motion into the linear motion of the drive plate 340. The drive plate 340 drives the support plate 1100 to slide along the first slide rail 1110 through the connecting seat 350. The two clamping blocks 1120 move closer to each other, and the arc-shaped groove 620 fits tightly against the edge of the tabletop. Releasing the handwheel 190 causes the spring 480 to return to its original deformation, pushing the gear ring 710 upward and causing the upper mounting cylinder 490 and the adjusting cylinder 180 to return to their axial positions. The fourth locking tooth 740 re-engages fully with the fourth locking groove 810, fixing the upper mounting cylinder 490 in place, and forming a rigid connection between the equipment and the tabletop.

[0060] Step 3: Pull the handwheel 190 upwards, causing the adjusting cylinder 180 to move axially upwards. The spring 480 is stretched by the lower flange 460 of the lower mounting cylinder, causing the second locking tooth 470 of the lower mounting cylinder 120 to disengage from the second locking groove 450 on the bottom wall of the mounting cavity 310, thus releasing the lower mounting cylinder 120 from its fixed position. During this process, the fourth locking tooth 740 of the upper mounting cylinder 490 and the fourth locking groove 810, and the third locking tooth 4100 of the adjusting cylinder 180 and the third locking groove 730 of the upper mounting cylinder 490 remain engaged, keeping the upper mounting cylinder 490 fixed. Rotating the handwheel 190 causes the adjusting cylinder 180 to rotate synchronously with the lower mounting cylinder 120 through the engagement of the first locking tooth 440 and the first locking groove 420. The strip plate 130 at the bottom of the lower mounting cylinder 120 rotates along with it, adjusting the measuring mechanism to the target direction (such as an angle perpendicular to the initial direction). Release the handwheel 190, the spring 480 retracts and resets, pull the lower flange 460 of the lower mounting cylinder downwards, the second locking tooth 470 re-engages fully with the corresponding second locking groove 450, the lower mounting cylinder 120 is fixed, and the measuring mechanism remains stable in the current direction.

[0061] Step 4: Loosen the wing bolts 1130 at the rangefinder mounting base 140 and the reflector mounting base 150, and slide the two mounting bases along the strip plate 130 so that the bottom ends of the two sets of measuring rods 160 respectively abut against the edge of the disc formed by the expansion of cement mortar, ensuring that the measuring rods 160 are in close contact with the edge of the disc.

[0062] Tighten the wing bolt 1130 so that its end abuts against the side wall of the strip plate 130 to fix the position of the rangefinder mounting base 140 and the reflector mounting base 150, and prevent them from shifting during the measurement process.

[0063] Step 5: Turn on the laser rangefinder 141 and emit a laser to the reflector 220. The instrument will automatically read the distance between the two. This value is exactly equal to the distance between the two sets of measuring rods 160, which is the diameter of the cement mortar disc in the current measuring direction.

[0064] Step Six: After measurement, press down on handwheel 190 to unlock the upper mounting cylinder 490. Rotate handwheel 190 to separate the clamping blocks 1120, releasing them from the tabletop. Release handwheel 190, slide the rangefinder mounting base 140 and reflector mounting base 150 to their initial positions at both ends of the strip plate 130 and lock them in place. Turn off the laser rangefinder 141. Clean the cement residue from the measuring rod 160, clamping blocks 1120, and tabletop. Check the condition of all components to ensure proper functioning for the next use.

[0065] In summary, the above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the present invention.

Claims

1. A cement mortar flowability tester, characterized in that: The utility model provides a cement mortar flow degree measuring device, including the body (100) of measuring instrument, the body (100) of measuring instrument includes the mounting box (110), the bottom end surface of mounting box (110) is equipped with the clamping mechanism for clamping the side wall of jump table desktop, the center of mounting box (110) is equipped with the lower mounting cylinder (120) rotationally, the bottom end part of lower mounting cylinder (120) is stretched out mounting box (110), the bottom end part of lower mounting cylinder (120) is connected with the strip plate (130) that is stretched out mounting box (110), and the measuring mechanism for measuring the flow degree of cement mortar is equipped at strip plate (130) place, and the measuring mechanism includes range finder mounting seat (140) and light board mounting seat (150), range finder mounting seat (140) and light board mounting seat (150) are all equipped with the square through -hole (210) of gap cooperation with strip plate (130), and range finder mounting seat (140) and light board mounting seat (150) are respectively set up in the both ends of length direction of strip plate (130) and can slide at strip plate (130), and range finder mounting seat (140) is equipped with laser range finder (141), and light board mounting seat (150) is equipped with light board (220), the bottom end of range finder mounting seat (140) and the bottom end of light board mounting seat (150) are all equipped with measuring rod (160), and the bottom end part of measuring rod (160) is used to move to the edge of cement pie at jump table desktop, and the distance between laser range finder (141) and light board (220) is equal to the distance between measuring rod (160) at range finder mounting seat (140) and measuring rod (160) at light board mounting seat (150).

2. The apparatus of claim 1, wherein: The mounting cavity (310) is arranged in the mounting box (110), and the mounting cavity (310) is provided with a mounting cavity through hole (320) at the center.

3. A cement paste fluidity measuring apparatus according to claim 2, wherein: The upper end of the mounting cavity (310) is provided with a cover plate (170) for sealing the mounting cavity (310), the center of the cover plate (170) is provided with a cover plate through hole (330), the top end of the lower mounting cylinder (120) is expanded outward to form a lower mounting cylinder upper flange (410), the bottom end surface of the lower mounting cylinder upper flange (410) is provided with a plurality of first clamping grooves (420) distributed along the circumference thereof, the cover plate through hole (330) is rotatably provided with an adjusting cylinder (180) in gap cooperation with the lower mounting cylinder upper flange (410), the bottom end of the adjusting cylinder (180) is inwardly contracted to form an adjusting cylinder lower flange (430) in gap cooperation with the lower mounting cylinder (120), the upper end surface of the adjusting cylinder lower flange (430) is provided with a plurality of first clamping teeth (440), and the first clamping teeth (440) are used for cooperating with the first clamping grooves (420) to enable the lower mounting cylinder (120) to rotate with the rotation of the adjusting cylinder (180).

4. The apparatus of claim 3, wherein: The bottom wall of the installation cavity (310) is provided with a plurality of second clamping grooves (450) uniformly distributed circumferentially along the installation cavity through hole (320), the bottom end of the lower installation cylinder (120) is expanded outward to form a lower installation cylinder lower flange (460), the bottom end surface of the lower installation cylinder lower flange (460) is provided with a plurality of second clamping teeth (470), and the installation cavity (310) is provided with a spring (480) for pressing the second clamping teeth (470) into the second clamping grooves (450) to fix the lower installation cylinder (120).

5. A cement paste fluidity measuring apparatus according to claim 4, wherein: The upper end of the adjusting cylinder (180) protrudes through the cover plate through hole (330), and the end of the adjusting cylinder (180) protruding through the cover plate through hole (330) is provided with a hand wheel (190).

6. The apparatus of claim 4, wherein: The clamping mechanism includes two support plates (1100) arranged at the bottom end of the installation box (110), the two support plates (1100) are arranged opposite along the length direction of the installation box (110), the bottom end surface of the installation box (110) is provided with a first sliding rail (1110), the support plate (1100) is provided with a first sliding block (610) matched with the first sliding rail (1110), the bottom end of the support plate (1100) is connected with a clamping block (1120), and the clamping block (1120) is provided with an arc-shaped groove (620) matched with the edge of the jumping table top; the installation box (110) is provided with a driving mechanism for driving the support plate (1100) to move.

7. A cement paste fluidity measuring apparatus according to claim 6, wherein: The bottom wall of the installation cavity (310) is provided with two groups of strip-shaped through holes (510), the driving mechanism includes a driving plate (340) slidingly arranged in the strip-shaped through hole (510), the bottom end of the driving plate (340) protrudes out of the strip-shaped through hole (510), the bottom end of the driving plate (340) protruding out of the strip-shaped through hole (510) is provided with a connecting seat (350), the connecting seat (350) is bolted with the support plate (1100); the bottom wall of the installation cavity (310) is provided with a second sliding rail (520) located at the strip-shaped through hole (510), the side wall of the driving plate (340) is provided with an L-shaped plate (630), one end of the L-shaped plate (630) is connected with the driving plate (340), the other end of the L-shaped plate (630) is provided with a second sliding block (640) matched with the second sliding rail (520); the installation cavity (310) is provided with an upper installation cylinder (490) sleeved outside the adjusting cylinder (180), the upper side wall of the driving plate (340) is provided with a rack (650), the top end of the upper installation cylinder (490) is provided with a gear ring (710) engaged with the rack (650), the upper end of the spring (480) abuts against the gear ring (710), and the lower end of the spring (480) abuts against the lower installation cylinder lower flange (460).

8. A cement paste fluidity measuring apparatus according to claim 7, wherein: The bottom end of the upper mounting cylinder (490) is inwardly contracted to form an upper mounting cylinder lower flange (720) which is in clearance fit with the lower mounting cylinder (120), a plurality of third clamping teeth (4100) are arranged at the lower end face of the adjusting cylinder lower flange (430), a plurality of third clamping grooves (730) are arranged at the upper end face of the upper mounting cylinder lower flange (720), the third clamping teeth (4100) are used for cooperating with the third clamping grooves (730) so that the upper mounting cylinder (490) can rotate with the rotation of the adjusting cylinder (180).

9. A cement paste fluidity measuring apparatus according to claim 8, wherein: A plurality of fourth clamping grooves (810) are arranged at the bottom end face of the cover plate (170) and are distributed circumferentially along the cover plate through hole (330), a plurality of fourth clamping teeth (740) are arranged at the gear ring (710) and are uniformly distributed, the fourth clamping teeth (740) are used for being clamped into the fourth clamping grooves (810) under the elastic force of the spring (480) to fix the upper mounting cylinder (490).

10. The apparatus of claim 1, wherein: The rangefinder mounting seat (140) and the reflector plate mounting seat (150) are both provided with threaded holes (230) which are in communication with the square through holes (210), the threaded holes (230) are provided with butterfly bolts (1130), and the end portions of the butterfly bolts (1130) are used for abutting against the side walls of the strip-shaped plate (130) to fix the rangefinder mounting seat (140) and the reflector plate mounting seat (150).

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