Cement mortar fluidity measuring device

Abstract

The invention relates to a cement mortar fluidity measuring device, and aims to solve the problems of long transfer time, dependence on manual operation, poor coaxiality control and the like caused by separation of a blending device and a measuring device in the prior art, the blending device and the measuring device are integrally arranged up and down, and a clamping mechanism is additionally arranged at the side end of a stirring pot and a position corresponding to a test mold of a material bearing disc. According to the design, uniform mixing and determination are completed at a single station, and the transfer time is shortened; the clamping mechanism ensures that the stirring pot and the planetary stirring device are concentric and the test mold and the material bearing disc are concentric, so that visual inspection errors are eliminated; meanwhile, a traditional lifting plate is replaced, the stirring pot lifting space is increased, and assembly is simplified. The detection process is effectively controlled within six minutes, manual interference is reduced, and the detection accuracy and efficiency are improved.

Description

Technical Field

[0001] This invention relates to the field of flowability measuring devices, and more particularly to a cement mortar flowability measuring device. Background Technology

[0002] The core structure of the existing cement mortar flowability testing device includes a material receiving tray, a lifting mechanism, and a test mold. The material receiving tray is a smooth, flat surface with only a centering line on its upper side for positioning assistance. The lifting mechanism, located on its lower side, consists of a spiral cam and a drive motor, which drives the material receiving tray to rise and fall freely. During testing, the test mold must be manually placed on the material receiving tray. The operator fills the mold with the mixed mortar, and then the lifting mechanism performs 25 vibrations within 25 seconds to flatten the mortar. Finally, the flowability is measured using a scale. The placement of the test mold relies on visual judgment of its coaxiality with the material receiving tray, and the operational accuracy is significantly affected by human experience.

[0003] The independent mixing unit consists of a frame, a lifting plate, a planetary mixer, and a mixing pot. In use, the lifting plate must first be lowered, and the mixing pot tilted and inserted between the lifting plate and the planetary mixer (to avoid interference). Then, the lifting plate is raised to secure the mixing pot, and the planetary mixer is activated to mix the pure water, cement, and sand. After mixing is complete, the lifting plate must be lowered again, and the mixing pot disassembled for subsequent transfer operations. This cumbersome loading and unloading process further increases operating time and costs.

[0004] Because the mixing device and the testing device are separate, the transfer process becomes a bottleneck in the testing procedure. After mixing, the operator must manually transfer the mixing pot from the mixing device to the testing device, and then manually fill the mold with mortar using a scraper (the mold must be manually placed and aligned beforehand). This process involves multiple manual operations, including disassembling the mixing pot, transferring it, and filling the mold. If the operator is slow or makes a mistake, the total time from the start of mixing to the completion of the test can easily exceed the specified 6 minutes, violating the time requirements of the "Method for Determining the Flowability of Cement Mortar" standard.

[0005] In summary, the existing technology's design of separating the two devices has flaws, directly leading to excessively long transport times, which has become a core issue restricting testing efficiency and result reliability. How to shorten the transport time and ensure the testing process is completed within the specified time is a key pain point that the existing technology urgently needs to address. Summary of the Invention

[0006] To address the limitations of existing technologies, this invention proposes a cement mortar flowability measuring device. This design employs an integrated approach, allowing operators to complete the mixing of pure water, cement, and sand from a single operating position, as well as the measurement of the flowability of the mixed cement mortar. This saves operating time, ensuring the overall operation time is controlled within 6 minutes.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A cement mortar flowability measuring device includes a material receiving plate with a lifting mechanism on its lower side. The device is characterized by a mixing device on the upper side of the material receiving plate, comprising a mixing pot and a planetary mixing device. A set of clamping mechanisms is respectively provided on the side end of the mixing pot and on the upper side of the material receiving plate. Each set of clamping mechanisms includes two contact ring plates that move linearly left and right under the action of a cylinder. Simultaneously, a lead screw pair is provided at the far end of each of the two contact ring plates of each set of clamping mechanisms, driving the clamping mechanism to move linearly up and down. A discharge hole is provided on the mixing pot, and a plugging mechanism is provided inside the discharge hole.

[0008] Preferably, the mixing pot is a double-layered pot body, the plugging mechanism is located between the double-layered pot bodies, and the plugging mechanism includes a blocking plate with an inverted T-shaped structure on the vertical surface. The outer diameter of the upper part of the blocking plate is equal to the inner diameter of the discharge hole. An internally threaded hole is eccentrically opened on the blocking plate, and a screw is screwed into the internally threaded hole. The screw is rotatably connected to the mixing pot, and a driving component is provided on one side of the screw. A protrusion is provided on the lower side of the blocking plate, and a limiting post is provided between the double-layered pot bodies for the protrusion on the blocking plate. The limiting post and the screw are respectively located on the left and right sides of the central axis of the blocking plate.

[0009] Preferably, the planetary stirring device includes a follower tube with multiple stirring blades arranged on the outer side of the follower tube. Multiple positioning tubes communicating with the inner cavity of the follower tube are fixedly connected to the side end of the follower tube. Each positioning tube corresponds to one of the multiple stirring blades, and a limiting groove is formed through the positioning tube. The angle between the central axis of the limiting groove and the vertical plane is greater than 0° and less than 45°. Each stirring blade has a receiving groove at the end near the follower tube. The positioning tube is inserted into the corresponding receiving groove, and a limiting shaft is fixedly connected to the inner side of the receiving groove. The limiting shaft is inserted into the limiting groove. When the limiting shaft moves from the end of the limiting groove near the follower tube to the end away from the follower tube, the angle between the stirring blade and the horizontal plane gradually decreases. At the same time, a counterweight is fixedly connected to the end of each stirring blade away from the follower tube.

[0010] Preferably, the follower tube side end is provided with multiple layers of positioning tubes from top to bottom, and multiple positioning tubes in each layer are arranged equidistantly around the central axis of the follower tube. Among the multiple layers of positioning tubes on the side end of the follower tube, a reset mechanism is provided between the upper layers of positioning tubes. The reset mechanism includes a reset spring. Each layer of multiple positioning tubes has a reset spring arranged on its inner side along its respective central axis. One axial end of the reset spring is movably connected to the corresponding stirring blade, and the other axial end of the reset spring is movably connected to the inner cavity of the follower tube.

[0011] Preferably, the reset mechanism further includes a positioning plate located inside the follower tube and fixedly connected to the inner wall of the follower tube. Each positioning plate is rotatably connected to multiple hook-shaped auxiliary drive blocks, which correspond one-to-one with multiple positioning tubes. The lightweight end of each auxiliary drive block is rotatably connected to the positioning plate, the outer side of the weight end of each auxiliary drive block is movably connected to the corresponding reset spring, and the inner side of the weight end of each auxiliary drive block is movably connected to a tension spring. The other axial end of the tension spring is movably connected to the positioning plate. When the tension spring is not subjected to external force, the auxiliary drive block is located inside the positioning plate.

[0012] Preferably, the mixing pot includes an inner pot body and an outer pot body. The inner pot body has multiple through holes, and a follower rod is slidably connected in each through hole. Each through hole has an elastic plate near the central axis of the inner pot body, and the elastic plate is fixedly connected to the inner pot body. Each elastic plate is also fixedly connected to the follower rod, and each elastic plate has an elliptical structure when projected vertically. A feeding mechanism is provided between the inner pot body and the outer pot body, and the feeding mechanism is drivenly connected to the follower rod.

[0013] Preferably, the feeding mechanism includes a spiral feeding plate disposed between the inner pot body and the outer pot body. The spiral feeding plate has multiple feeding holes that are opened through it, and each feeding hole corresponds to a multiple elastic sheet. Each feeding hole has a storage bin with an open upper end disposed on its lower side. A baffle plate is slidably connected to the side of the storage bin near the inner pot body. The baffle plate is connected to the follower rod through it via a pull rope. The inner pot body has multiple discharge holes that are opened through it, and each discharge hole corresponds to a multiple baffle plate.

[0014] Preferably, a striking rod is provided on the lower side of the storage bin, the striking rod is elastically slidably connected to the inner wall of the outer pot, and the striking rod abuts against the lower end face of the storage bin. A driven plate is fixedly connected to the outer side of the follower rod. When the elastic plate abuts against the stirring blade, the driven plate pushes the striking rod to move away from the central axis of the inner pot. When the elastic plate does not contact the stirring blade, the driven plate does not contact the striking rod.

[0015] Preferably, the stirring blade corresponding to the reset mechanism is blade I, and the remaining stirring blades are blade II. The angle between blade II and the horizontal plane is smaller than the maximum angle between blade I and the horizontal plane, and the angle between blade II and the horizontal plane is greater than the minimum angle between blade I and the horizontal plane.

[0016] Preferably, the centerline of the stirring blade is a spiral structure, and the angle formed between the end of the stirring blade away from the follower tube and the central axis of the follower tube is smaller than the angle formed between the end of the stirring blade near the follower tube and the central axis of the follower tube. At the same time, the angle formed between the end of the stirring blade away from the follower tube and the horizontal plane is larger than the angle formed between the end of the stirring blade near the follower tube and the horizontal plane.

[0017] Compared with the prior art, the beneficial effects of the present invention are: This device effectively shortens the cement mortar transfer time by integrating the mixing and testing devices vertically, ensuring that the entire process from mixing to testing is completed within 6 minutes. The clamping mechanism on the side of the mixing pot and the upper side of the receiving tray, driven by a cylinder-driven contact ring plate, achieves precise concentric positioning of the mixing pot and the planetary mixing device, as well as the mold and the receiving tray, eliminating the error of manual visual alignment. The screw pair drives the clamping mechanism to move up and down, replacing the lifting plate of the traditional mixing device, increasing the lifting space of the mixing pot and simplifying the assembly operation. The coaxial discharge hole on the mixing pot, combined with the plugging mechanism, enables automatic unloading of mortar, saving the time of manual scraping and filling, and significantly improving operating efficiency and testing consistency.

[0018] The planetary mixer uses a positioning tube and a limiting groove on the side of the follower tube to cooperate with the limiting shaft of the mixing blade. It uses the centrifugal force of the counterweight to drive the mixing blade to move along the limiting groove and adaptively adjust the tilt angle: at low speed, the mixing blade is close to vertical, quickly pushing the cement to increase the contact area with water; at medium speed, it has the functions of pushing material and crushing sand and gravel agglomeration; at high speed, it is close to horizontal, enhancing shear force and reducing rotational resistance, adapting to the needs of different mixing stages; the combination of reset springs, auxiliary drive blocks and tension springs between the multi-layer positioning tubes dynamically adjusts the reset function at different speeds, ensuring that the mixing blade automatically resets when it slows down or stops, avoiding the adsorption of mixed material and affecting subsequent use, and improving the mixing adaptability and reliability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the mixing pot of the present invention; Figure 3 This is a schematic diagram showing the positional relationship between the screw and the blocking plate of the present invention; Figure 4 This is a schematic diagram showing the positional relationship between the planetary stirring device and the stirring pot of the present invention; Figure 5 This is a schematic diagram showing the positional relationship between the follower tube and the stirring blade of the present invention; Figure 6 This is a schematic diagram showing the positional relationship between the positioning tube and the reset mechanism of the present invention; Figure 7 This is a schematic diagram showing the connection relationship between the reset mechanism and the follower tube of the present invention; Figure 8 This is a schematic diagram showing the positional relationship between the reset spring and the tension spring of the present invention; Figure 9 This is a schematic diagram showing the positional relationship between the reset spring and the stirring blade of the present invention; Figure 10This is a schematic diagram showing the connection relationship between the stirring blade and the limiting block of the present invention; Figure 11 for Figure 2 A magnified view of a portion of point A in the middle; Figure 12 This is a schematic diagram showing the positional relationship between the outer pot body and the spiral feeding plate of the present invention; Figure 13 This is a schematic diagram showing the positional relationship between the storage bin and the follower rod of the present invention; Figure 14 This is a schematic diagram showing the connection relationship between the baffle plate and the pull rope of the present invention; Figure 15 This is a schematic diagram showing the positional relationship between the striking rod and the follower rod of the present invention.

[0020] In the diagram: 1. Material receiving tray; 2. Lifting mechanism; 3. Planetary agitator; 31. Follower tube; 32. Agitator blade; 321. Blade I; 322. Blade II; 33. Positioning tube; 34. Limiting groove; 35. Reset mechanism; 351. Reset spring; 352. Auxiliary drive block; 353. Positioning plate; 354. Tension spring; 36. Limiting shaft; 37. Counterweight; 4. Mixing pot; 41. Through hole; 4 2. Elastic sheet; 43. Inner pot body; 44. Outer pot body; 45. Discharge hole; 5. Feeding mechanism; 51. Spiral feeder plate; 52. Storage bin; 53. Striking rod; 54. Follower rod; 55. Feeding hole; 56. Baffle plate; 57. Pull rope; 6. Clamping mechanism; 61. Contact ring plate; 62. Cylinder; 63. Lead screw pair; 7. Plug mechanism; 71. Screw; 72. Drive component; 73. Blocking plate. Detailed Implementation

[0021] 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0023] Please see Figure 1This invention relates to a cement mortar flowability measuring device, the core purpose of which is to enhance the compactness of the overall testing process, minimize the transfer time of cement mortar, and effectively maintain the entire process of cement mortar from the start of mixing to the completion of testing within six minutes.

[0024] In existing technical devices, the apparatus for determining the flowability of cement mortar typically consists only of a receiving pan 1, with a lifting mechanism 2 (composed of a spiral cam and a corresponding drive motor) located on the lower side of the receiving pan 1. Under the action of the lifting mechanism 2, the receiving pan 1 completes the process of rising and free falling. During this period, the cement mortar located on the upper side of the receiving pan 1 is flattened due to vibration. After multiple oscillations (25 oscillations within 25 seconds), the flowability of the cement mortar is determined by measuring with a scale.

[0025] It is worth noting that in the existing technology, the cement mortar mixing device and the aforementioned testing device are two independent sets of devices. In actual operation, the operator uses the mixing device to mix pure water, cement, and sand, and then manually adds the mixed cement mortar into the test mold with the help of tools such as scrapers (the test mold must be manually placed on the material receiving plate 1, and it must be ensured that the test mold and the material receiving plate 1 are coaxial).

[0026] It should be noted that the mixing device in the existing technology usually consists of a frame, a lifting plate, and a planetary mixing device 3. In actual use, the lifting plate is first lowered, and the mixing pot 4 is tilted and inserted between the lifting plate and the planetary mixing device 3 (to avoid interference between the mixing pot 4 and the planetary mixing device 3). Then the lifting plate is raised, and the planetary mixing device 3 is started to complete the mixing operation. Correspondingly, after the mixing is completed, the lifting plate is lowered, the mixing pot 4 is disassembled, and then it is moved to a specific position to load the material into the test mold.

[0027] Furthermore, the process of adding the test mold is highly manual, often relying on visual judgment of the coaxiality between the test mold and the support plate 1 (the support plate 1 is required to be a smooth plane, and its upper side is generally only provided with a center line); at the same time, the process of adding cement mortar and disassembling the test mold are highly dependent on the smoothness of the operator's hand movements (in this process, if the operator's hand shakes and applies a horizontal pushing force to the cement mortar in the test mold, it will cause the final flattened cement mortar to present an ellipse with a large difference between its major and minor axes).

[0028] Therefore, as Figure 1 As shown, unlike existing technology devices, this device arranges the mixing device and the measuring device vertically, thereby reducing the time for operators to transfer cement mortar and enabling operators to complete the mixing and measuring process of cement mortar in a single working position.

[0029] Meanwhile, the device is equipped with a set of clamping mechanisms 6 on the side of the mixing pot 4 and on the upper side of the material receiving plate 1 (corresponding to the position of the test mold) to control the position of the test mold and the mixing pot 4.

[0030] In addition, the presence of the clamping mechanism 6 can also help the mixing pot 4 and the main drive wheel of the planetary mixing device 3 to be concentric, ensuring that the test mold and the material receiving plate 1 are concentric.

[0031] Specifically, as shown in the figure, each clamping mechanism 6 includes two contact ring plates 61 that move left and right in a straight line under the action of the cylinder 62. The inner side of the contact ring plates 61 is provided with an elastic pad to ensure frictional resistance and avoid damage to the mixing pot 4 and the outer wall of the mold.

[0032] In particular, the contact ring plate 61 and the cylinder 62 should be rotatably connected. This ensures that the contact ring plate 61 can adapt to different contact surfaces (the prototype is a frustum-shaped structure), thereby increasing the versatility of the parts and reducing the cost of use.

[0033] In addition, each clamping mechanism 6 has a lead screw pair 63 at the far end of the two contact ring plates 61. The lead screw pair 63 drives the clamping mechanism 6 to move vertically. This not only enables the vertical upward movement of the mold, but also replaces the lifting plate carried by the mixing device, giving the mixing pot 4 a larger lifting space, which makes it easier for operators to assemble the mixing pot 4.

[0034] like Figure 2 , Figure 3 As shown, this device has a discharge hole on the mixing pot 4 and ensures that the discharge hole is coaxial with the test mold. In this way, when the discharge hole is opened, the cement mortar in the mixing pot 4 can be automatically discharged, saving the time of the operator to fill the filling multiple times with a scraper.

[0035] Accordingly, the device is equipped with a plugging mechanism 7 in the discharge hole to control the opening and closing of the discharge hole.

[0036] The plugging mechanism 7 is located between the two pots (the stirring pot 4 is a double pot). Its plugging structure includes a blocking disc with an inverted T-shaped vertical surface. The outer diameter of the upper part of the blocking disc is equal to the inner diameter of the discharge hole, which can fully block the discharge hole.

[0037] In addition, the device has an eccentrically threaded hole on the aforementioned blocking plate, and a screw 71 is screwed into the threaded hole. By utilizing the eccentric connection between the screw 71 and the blocking plate, when the blocking plate 73 is inside the discharge hole, the screw 71 rotates and drives the blocking plate 73 to move up and down linearly. When the blocking plate 73 is not inside the discharge hole, the screw 71 rotates and drives the blocking plate 73 to rotate around the central axis of the screw 71 (i.e., the blocking plate 73 rotates eccentrically), at which time the discharge hole can be opened.

[0038] Correspondingly, the device has a protrusion on the lower side of the blocking plate, and a limit post is set between the double-layer pot body for the protrusion on the blocking plate. When the blocking plate 73 is located below the discharge hole and the screw 71 reverses (this process corresponds to the reset of the blocking plate 73), the protrusion hits the limit post. At this time, the movement state of the blocking plate 73 and the screw 71 is not unified. At this time, the blocking plate 73 can move vertically upward into the discharge hole to complete the sealing of the discharge hole.

[0039] Furthermore, the device also has a limit post on the same side as the limit post. This can limit the rotation angle of the blockage plate 73 after the blockage plate 73 is opened (i.e., the minimum overlapping area between the blockage plate 73 and the discharge hole on the horizontal plane).

[0040] like Figure 1 , Figure 4 As shown, the planetary mixing device 3 of this device further includes a follower tube 31, which performs planetary circumferential motion around the mixing pot 4 under the drive of the drive mechanism inside the frame 2, thereby achieving a highly efficient mixing effect.

[0041] In addition, such as Figure 4 , Figure 5 As shown, in order to enhance the shearing effect on the mixture, the device is equipped with multiple stirring blades 32 on the outside of the follower tube 31. The shearing effect on the mixture is achieved by the structure of the stirring blades 32 themselves, preventing the aggregate from agglomerating.

[0042] Meanwhile, the presence of the stirring blade 32 can also help discharge the cement mortar in the mixing pot 4 by scraping against the bottom wall of the mixing pot 4 when the discharge hole is opened.

[0043] Furthermore, such as Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 10 As shown, in order to improve the targeting of the planetary stirring device 3 under different working conditions (the state of the material in the stirring pot 4), the device has a number of positioning tubes 33 fixedly connected to the side end of the follower tube 31 and communicating with the inner cavity of the follower tube 31. The multiple positioning tubes 33 correspond one-to-one with the multiple stirring blades 32, and a limiting groove 34 is opened through the positioning tube 33. The angle between the central axis of the limiting groove 34 and the vertical plane is greater than 0° and less than 45°.

[0044] Meanwhile, this device has receiving grooves at the end of the stirring blade 32 near the follower tube 31, and positioning tubes 33 are inserted into the corresponding receiving grooves. A limiting shaft 36 is fixedly connected to the inside of each receiving groove, and the limiting shaft 36 is inserted into a limiting groove 34. This design utilizes the curvature change of the limiting groove 34 to constrain the position of the limiting shaft 36, thereby forcing the stirring blade 32 to rotate when its horizontal position is changed, thus changing its tilt angle. That is, when the limiting shaft 36 moves from the end of the limiting groove 34 near the follower tube 31 to the end away from the follower tube 31, the angle between the stirring blade 32 and the horizontal plane gradually decreases.

[0045] Therefore, in practical applications, this device can adjust the horizontal position of the stirring blades 32 in real time according to the stirring process to adapt to different material states.

[0046] Specifically, when the follower tube 31 rotates at low speed, i.e., when only cement and pure water exist in the mixing pot 4, the limiting shaft 36 is located at the end of the limiting groove 34 near the follower tube 31. At this time, the angle between the stirring blade 32 and the horizontal plane is the largest, almost vertical, and its horizontal thrust on the material is also the largest, which can quickly push the cement flat in the mixing pot 4, thereby increasing the contact area between cement and pure water and realizing rapid mixing of the two. When the follower tube 31 rotates at medium speed, the limiting shaft 36 is located in the middle section of the limiting groove 34. At this time, the stirring blade 32 has the functions of pushing material and breaking up sand and gravel clumps, which can prevent the sand and gravel from agglomerating in the initial stage, and at the same time can push them flat, so that they are evenly distributed in the mixing pot 4. When the follower tube 31 rotates at high speed, the limiting shaft 36 is located at the end of the limiting groove 34 away from the follower tube 31. At this time, the angle between the stirring blade 32 and the horizontal plane is the smallest, almost horizontal, and its horizontal shear force is the largest, and the resistance encountered during rotation is the smallest. This prevents the aggregate from agglomerating and avoids excessive resistance during high-speed rotation. At the same time, the mixing blades 32 retain a certain tilt angle, which can be used to change the height of the material in contact during high-speed rotation (i.e., apply vertical thrust by using the tilt angle), thereby achieving mixing of materials at different heights.

[0047] Furthermore, due to the small actual size and the difficulty of wiring, it is difficult to control the horizontal position of multiple stirring blades 32 in real time using electronic control components. Therefore, a counterweight 37 is fixedly connected to the end of the stirring blade 32 away from the follower tube 31. During the medium and high speed rotation of the follower tube 31, due to the influence of centrifugal force, the counterweight 37 will drive the stirring blade 32 to move away from the follower tube 31, thereby changing the tilt angle of the stirring blade 32.

[0048] It is particularly important to note that, in practice, cement mortar has a certain degree of viscosity, which will exert resistance on the mixing blade 32 in the opposite direction to its rotation. Since the mixing blade 32 moves in a direction perpendicular to its rotation, although the cement mortar still has a certain resistance, it is not enough to significantly hinder the sliding of the mixing blade 32. Furthermore, the resistance exerted by the cement mortar on the mixing blade 32 will cause the mixing blade 32 to rotate and tend to move horizontally. Therefore, in practice, the mixing blade 32 can move fully in the direction away from the follower tube 31 as expected.

[0049] Furthermore, in order to improve the mixing efficiency and avoid the poor disturbance effect of a single mixing blade 32 on the mixture, this device is provided with multiple layers of positioning tubes 33 from top to bottom on the side end of the follower tube 31, with multiple positioning tubes 33 in each layer arranged equidistantly around the central axis of the follower tube 31.

[0050] In addition, such as Figure 5 As shown, this device constrains multiple positioning tubes 33 of adjacent layers to not be in the same vertical plane. This avoids mutual disturbance of the mixture and ensures that the mixture can achieve large-scale vertical mixing when it is pushed by the vertical direction of the stirring blade 32.

[0051] It is worth noting that the vertical movement amplitude and distance of the mixture are directly affected by the inclination of the stirring blade 32, and it settles at the bottom of the mixing pot 4 due to gravity. In order to ensure the mixing efficiency under different mixing conditions, the angle of the bottom stirring blade 32 is fixed so that its distance from the follower tube 31 does not change with the rotation speed of the follower tube 31, and it is fixedly connected to the positioning tube 33.

[0052] Accordingly, since the mixture settles at the bottom of the mixing pot 4, it is in direct contact with the bottom stirring blade 32 under normal conditions. Therefore, in order to avoid the bottom stirring blade 32 bearing a large resistance during rotation, this device constrains its tilt angle to an intermediate state, that is, its tilt angle is neither in the state of pushing material close to vertical nor in the state of cutting close to horizontal, but in between.

[0053] In summary, this device designates the bottommost stirring blade 32 as blade I 321, and the rest as blade II 322. The angle between blade II 322 and the horizontal plane is smaller than the maximum angle of blade I 321, but larger than the minimum angle of blade I 321.

[0054] Furthermore, such as Figure 6 As shown, in order to save operation time and avoid the inconvenience of manual adjustment, a reset mechanism 35 is provided between the multi-layer positioning tubes 33. This mechanism provides a pulling force to the stirring blade 32 toward the follower tube 31, so that it automatically resets after the follower tube 31 stops or slows down.

[0055] Specifically, such as Figure 7 , Figure 8 , Figure 9 As shown, the reset mechanism 35 includes a reset spring 351 for pulling the stirring blade 32 toward the follower tube 31. The reset spring 351 (as shown) Figure 10 One axial end is movably connected to the stirring blade 32, and the other axial end is movably connected to the inner cavity of the follower tube 31.

[0056] Furthermore, to eliminate the adsorption effect of the mixture on the stirring blades 32, a positioning plate 353 is fixedly connected inside the follower tube 31. Multiple auxiliary drive blocks 352 are rotatably connected to the positioning plate 353, with each auxiliary drive block 352 corresponding to one of the stirring blades 32. Therefore, the other axial end of each return spring 351 is movably connected to the outer end of the auxiliary drive block 352. This allows the return spring 351 to function when the auxiliary drive block 352 is not moving, and changes the position of the axial end of the return spring 351 when the auxiliary drive block 352 moves outward, thus allowing the stirring blades 32 to travel a longer distance.

[0057] In summary, when the device is stirring at medium speed, the position of the auxiliary drive block 352 needs to be kept unchanged. At this time, the elastic force of the return spring 351 is equal to the driving force generated by the counterweight 37 on the stirring blade 32. At the same time, when stirring at high speed, the auxiliary drive block 352 needs to be rotated towards its outer end. At this time, the elongation of the return spring 351 decreases, the tension on the stirring blade 32 is removed, and the driving force of the counterweight 37 can further drive the stirring blade 32 to move away from the follower tube 31.

[0058] Furthermore, this device can adjust the two movement lengths of the stirring blade 32 to ensure that when the auxiliary drive block 352 rotates outward, the extension of the return spring 351 is reduced to zero first. In this way, at the rear end of the movement stroke of the auxiliary drive block 352, it can be used to provide additional thrust to the return spring 351 (acting on the stirring blade 32), so that the stirring blade 32 moves a specific length away from the follower tube 31.

[0059] Specifically, to ensure the position of the auxiliary drive block 352 can be changed at different speeds and to avoid obstruction of control line layout by confined spaces and specific installation positions, the auxiliary drive block 352 is designed as a hook-shaped structure. The lightweight end of each auxiliary drive block 352 is rotatably connected to the positioning plate 353, the outer side of the heavy end is movably connected to the return spring 351, and the inner side is movably connected to the tension spring 354, with the other end of the tension spring 354 movably connected to the positioning plate 353. During medium-speed rotation, the centrifugal force and the tension of the return spring 351 on the auxiliary drive block 352 are less than the tension of the tension spring 354, and its position remains unchanged; during high-speed rotation, the centrifugal force increases, which can overcome the tension of the tension spring 354 and cause it to rotate outward.

[0060] In summary, this device must ensure that the elastic coefficient of the tension spring 354 is greater than that of the return spring 351, and that the rotational speed of the follower tube 31 corresponding to the return spring 351 is lower than that of the follower tube 31 corresponding to the tension spring 354, so as to ensure that the position of the auxiliary drive block 352 can change accordingly at different rotational speeds.

[0061] It is important to note that, due to size limitations, the displacement length of the stirring blade 32 is very limited. This avoids both an excessively large outer diameter of the follower tube 31 and an excessively large distance between the stirring blade 32 and the inner wall of the mixing pot 4 in the initial state, which would reduce the mixing effect on the edge mixture.

[0062] Therefore, to ensure that the angle change of the stirring blade 32 meets the requirements at different rotation speeds of the follower tube 31, it is necessary to avoid an excessively large angle between the limiting groove 34 and the vertical plane, otherwise the stirring blade 32 will experience greater resistance during short-distance movement. This device constrains the centerline of the stirring blade 32 to a spiral structure. The angle formed between the end of the stirring blade 32 away from the follower tube 31 and the horizontal plane is greater than the angle formed between the end of the stirring blade 32 closer to the follower tube 31 and the horizontal plane. Combined with the relatively thin thickness of the stirring blade 32, the horizontal thrust exerted by the mixture on the stirring blade 32 and the tensile force brought by the centrifugal force carried by the counterweight 37 on the stirring blade 32 ensure that even if the stirring blade 32 does not move (it does not rotate), its tilt angle tends to decrease at different rotation speeds (mainly the tilt angle of the end of the stirring blade 32 away from the follower tube 31).

[0063] Furthermore, to prevent the slippage between the stirring blade 32 and the positioning tube 33 from failing to meet the device's requirements for the movement of the stirring blade 32, at low speeds, the stirring blade 32 needs to maintain a large angle with the inner wall of the mixing pot 4 to prevent insufficiently mixed solid materials from forming agglomerates and causing jamming. At high speeds, the stirring blade 32 should be as close as possible to the inner wall of the mixing pot 4 (at this time, the mixture has been fully mixed and is in the form of a mortar with a certain degree of fluidity) to maximize the carrying effect of the mixture. Therefore, the device is designed such that the angle between the end of the stirring blade 32 away from the follower tube 31 and the central axis of the follower tube 31 is smaller than the angle between the end of the stirring blade 32 closer to the follower tube 31 and the central axis of the follower tube 31 (the projection of the center line of the stirring blade 32 on the horizontal plane is an arc). This design allows the stirring blade 32 to extend its length by deforming when rotating at high speeds (the projection of the center line of the stirring blade 32 on the horizontal plane becomes a straight line).

[0064] In addition, such as Figure 2 , Figure 11As shown, to fully utilize the variable distance between the stirring blades 32 and the inner wall of the mixing pot 4, and to ensure that the sand and gravel fall evenly, avoiding the large-scale agglomeration caused by the sand and gravel falling vertically into the inner cavity of the mixing pot 4 from a single position as in existing devices, this device constrains the mixing pot 4 to include an inner pot body 43 and an outer pot body 44.

[0065] Meanwhile, a feeding mechanism 5 is provided between the inner pot body 43 and the outer pot body 44. The main purpose of the feeding mechanism 5 is to ensure that when the follower tube 31 finishes rotating at low speed and enters the medium speed rotation stage, the material is fed evenly to multiple points in the inner pot body 43, thereby preventing the aggregate from agglomerating in a single location.

[0066] Specifically, such as Figure 11 , Figure 12 , Figure 13 As shown, the feeding mechanism 5 includes a spiral feeding plate 51 disposed between the inner pot body 43 and the outer pot body 44. Meanwhile, as... Figure 11 As shown, a mating hole is provided through the outer pot body 44. When the mixing pot 4 is driven upward by the frame 2 to the designated position, the discharge port of the storage tank on the frame 2 is directly connected to the mating hole. At this time, after the corresponding control valve on the storage tank is opened, the sand and gravel can directly enter the spiral feed plate 51 and move downward in a spiral due to the slope of the spiral feed plate 51 itself.

[0067] It is worth noting that, in practice, the discharge ports of the mixing pot 4 and the storage tank are relatively fixed, and the gap between them can be kept to a minimum, preventing sand and gravel from flowing out of the gap. Furthermore, in practice, a rubber pad can be installed at the discharge port of the storage tank to ensure that after the mixing pot 4 moves upward to a specific position, it can come into contact with the discharge port of the storage tank, thus completely eliminating the possibility of a gap.

[0068] Accordingly, the device has multiple through-holes 55 on the spiral feed plate 51, and each feed hole 55 has a corresponding open-top storage bin 52 below it. This design ensures that the sand and gravel automatically enters multiple storage bins 52 as it moves downward along the spiral feed plate 51 (by controlling the ratio of the width of the feed hole 55 to the width of the spiral feed plate 51, it can be prevented that all the sand and gravel enters a single storage bin 52).

[0069] In addition, a sliding baffle plate 56 is installed on the side of the storage bin 52 near the inner pot body 43. The baffle plate 56 corresponds to the discharge hole 45 opened on the inner pot body 43. The opening and closing of the discharge hole 45 can be controlled by sliding the baffle plate 56.

[0070] In practical applications, the position of the baffle plate 56 can be adjusted using electronic control components (such as electronic push rods, screws, etc.). However, if the electronic control components need to be matched with the position of the stirring blade 32 to prevent sand and gravel from falling onto the surface of the stirring blade 32, more complex electronic components are required, which is difficult to achieve and also costly.

[0071] Therefore, as Figure 11 , Figure 14 As shown, the device has multiple through holes 41 on the inner pot body 43, and a sliding follower rod 54 is installed in the through hole 41. The follower rod 54 is connected to the baffle plate 56 for transmission.

[0072] Specifically, to drive the follower rod 54, this device provides an elastic plate 42 on the side of each through hole 41 near the central axis of the inner pot body 43. The elastic plate 42 is fixedly connected to the inner pot body 43, and each elastic plate 42 is also fixedly connected to the follower rod 54. Utilizing the characteristic that each elastic plate 42 has an elliptical structure when projected vertically, when the stirring blade 32 moves away from the follower tube 31, the stirring blade 32 can squeeze the elastic plate 42, forcing it to deform, thereby pushing the follower rod 54 to move linearly in a specific direction, achieving the technical effect of controlling the opening and closing of the discharge hole 45.

[0073] In practice, the elastic sheet 42 can be made of stainless steel, which is inexpensive and has excellent reset performance.

[0074] Specifically, in this device, the constraint baffle plate 56 is connected to the follower rod 54 via a pull rope 57. One end of the pull rope 57 is fixed to the baffle plate 56, and the other end is fixed to the follower rod 54 adjacent to the baffle plate 56. (The outer wall of the inner pot body 43 is equipped with a corresponding tightening component and a limiting shaft 36 for tension conditions. The tightening component and the limiting shaft 36 cooperate with each other to constrain the direction of the force applied by the pull rope 57 to the baffle plate 56, and to ensure that the follower rod 54 moves to drive the baffle plate 56. In addition, the baffle plate 56 is also equipped with a reset component to ensure that the baffle plate 56 can automatically reset and close the discharge hole 45 after the force applied by the pull rope 57 to the baffle plate 56 is removed.) This design can realize priority material dropping (the material dropping point is located in front of the moving direction of the stirring blade 32) or delayed material dropping (the material dropping point is located in the moving direction of the stirring blade 32), thereby effectively preventing sand and gravel from falling on the surface of the stirring blade 32.

[0075] It should be noted that when the follower tube 31 rotates at high speed, it will further compress the elastic plate 42, causing it to deform, and will strike the elastic plate 42 quickly and repeatedly. This action causes the baffle plate 56 to move up and down frequently, forming a slight oscillation in the storage bin 52, ensuring that the sand and gravel in the inner cavity of the storage bin 52 can be fully discharged before the mixing ends, thus avoiding the sand and gravel content in the final mixture not meeting expectations.

[0076] Furthermore, the structural characteristics of the elastic sheet 42 itself mean that the connection position between it and the follower rod 54 must be small. If the connection position between it and the follower rod 54 is large, the connection position will inevitably hinder the elastic sheet 42 from undergoing elastic deformation.

[0077] Meanwhile, the reset process of the elastic sheet 42 and the follower rod 54 depends on the structural shape of the elastic sheet 42 itself, and does not require external force.

[0078] Furthermore, such as Figure 11 , Figure 15 As shown, to prevent small-diameter sand and gravel from accumulating in the storage bin 52 due to friction and thus preventing them from being discharged from the discharge hole 45, this device is equipped with a striking rod 53 on the lower side of the storage bin 52. The striking rod 53 is elastically (through a compression spring) slidably connected to the inner wall of the outer pot body 44, and the striking rod 53 abuts against the lower end face of the storage bin 52. This allows the striking rod 53 to be repeatedly struck by the reaction force exerted on it by the elasticity of the storage bin 52 and the inner wall of the outer pot body 44 after being affected by external force, thereby breaking the tight adhesion between the sand and gravel.

[0079] Specifically, to achieve the movement of the striking rod 53, a driven plate is fixedly connected to the outside of the follower rod 54. When the elastic plate 42 abuts against the stirring blade 32, the driven plate pushes the striking rod 53 to move away from the central axis of the inner pot body 43; at the same time, when the elastic plate 42 is not in contact with the stirring blade 32, the driven plate is also not in contact with the striking rod 53. This ensures that after the follower rod 54 returns to its original position following the elastic plate 42, the striking rod 53 has sufficient room to move.

[0080] This invention is based on the design of an "integrated mixing-determination" device, with the core objective of "simplifying mixing operations and shortening transfer time". Each stage is closely connected and achieves automated coordination based on the device structure.

[0081] I. Preparation Phase: Equipment Debugging and Material Readiness 1. Device initialization Turn on the equipment's main control system to ensure that the mixing device (including the planetary mixer and mixing pot) and the measuring device (including the material receiving plate and lifting mechanism) are in the initial standby state, all clamping mechanisms are reset to the open state, and the plugging mechanism is in the initial position of closing the discharge hole.

[0082] 2. Trial mold positioning Place the empty test mold in the corresponding position on the upper side of the material receiving tray, and start the clamping mechanism on the side of the material receiving tray. That is, the cylinder drives the two contact ring plates to move towards each other, and clamps the test mold through the inner elastic pad. The mechanism's self-positioning function ensures that the test mold and the material receiving tray are coaxial, eliminating the need for manual visual alignment.

[0083] 3. Assembly and positioning of the mixing pot The operator vertically places the double-layered mixing pot, consisting of an inner pot and an outer pot, between the clamping mechanisms of the mixing device (without tilting it). The operator then activates the side clamping mechanism of the mixing pot, and the contact ring plate clamps the mixing pot under the action of the cylinder, ensuring that the mixing pot is concentric with the main drive wheel of the planetary mixing device. At the same time, the lead screw of the clamping mechanism drives the mixing pot to rise to a mixing height that is compatible with the planetary mixing device.

[0084] 4. Initial material addition Based on the strength grade of the concrete, inject a preset amount of cement, pure water, and sand and gravel, and complete the initial material preparation according to a specific mix ratio.

[0085] II. Automatic Mixing Stage: Graded Mixing and Automatic Sand and Gravel Feeding 1. Low-speed mixing (premixing cement and water) Start the planetary mixer's follower tube to rotate at low speed. At this time: - Under the tension of the return spring, the limiting shaft of the stirring blade (blade II) is located at the end of the limiting groove near the follower tube, and the angle between the blade and the horizontal plane reaches its maximum value (close to vertical), generating the maximum horizontal thrust on the material, quickly pushing the cement flat, increasing the contact area with pure water, and accelerating the hydration of cement.

[0086] - The bottom fixed blade (blade I) rotates at a middle tilt angle to initially disturb the material settling at the bottom.

[0087] 2. Medium-speed mixing and automatic sand and gravel feeding When the servo tube speed increases to medium speed, the linkage mechanism is triggered: - The stirring blade (blade II) is subjected to the centrifugal force of the counterweight and moves away from the follower tube, overcoming the tension of the return spring. The limiting shaft moves to the middle section of the limiting groove, and the blade tilt angle decreases, thus having the dual function of pushing material and crushing sand and gravel.

[0088] - The auxiliary drive block remains fixed because the centrifugal force is less than the tension of the tension spring, and the driving force of the return spring and the counterweight block are balanced, so the blade position is stable.

[0089] - The movement of the stirring blades compresses the elastic plates of the inner pot, causing them to deform and push the follower rod to slide. This, in turn, moves the baffle plate via a pull rope, opening the discharge port of the inner pot. The sand and gravel in the storage bin are pre-distributed by the spiral feed plate and then fall evenly into the stirring pot from multiple discharge ports (the drop points avoid the surface of the blades), preventing agglomeration caused by feeding from a single location.

[0090] - The driven plate, linked to the follower rod, pushes the striking rod 53 to strike the storage bin through elastic reaction force, preventing the accumulation of sand and gravel.

[0091] 3. High-speed mixing By increasing the rotational speed of the servo tube to high speed, deep mixing can be achieved. - The centrifugal force of the counterweight of the stirring blade (blade II) increases, overcoming the tension of the tension spring and driving the auxiliary drive block to rotate outward. The elongation of the return spring gradually decreases until it reaches zero. At this time, the blade moves further outward, the limiting shaft moves to the far end of the limiting groove, and the angle between the blade and the horizontal plane reaches its minimum value (approaching horizontal), thereby generating the maximum horizontal shear force, which can efficiently disperse sand and gravel agglomerates. ② During high-speed rotation, the blade applies vertical thrust by virtue of its tilt angle, driving the materials at different heights to mix. At the same time, the multi-layered staggered blade design can avoid mutual interference between material disturbances. ③ The bottom blade I continuously stirs at a fixed angle, which can prevent the bottom material from settling. ④ The high-speed rotating blade frequently strikes the elastic plate, causing the baffle plate to open and close frequently, thereby realizing the micro-vibration of the storage bin and ensuring that the sand and gravel can be completely discharged.

[0092] III. First Unloading and Vibration Stage: Initial Feeding and Compaction Treatment 1. Unloading preparation: After the mixing operation is completed, the speed of the follower tube is reduced to a low speed, and the stirring blades are reset under the action of the return spring.

[0093] 2. Quantitative Initial Discharge: The screw of the plugging mechanism rotates, opening the discharge hole through the eccentric rotation of the plugging disc. The planetary mixer maintains a low speed to assist in feeding. Once the discharge amount reaches the preset value, the screw immediately reverses to close the discharge hole, preventing overfeeding.

[0094] 3. Manual vibration: The operator holds a standard tamping rod and evenly distributes the tamping points along the inner wall of the mold, vibrating from the edge to the center to ensure that the initial mortar is dense and without gaps. During vibration, care must be taken to avoid the tamping rod touching the inner wall of the mold, which could cause the mold to shift.

[0095] IV. Second Unloading and Vibration Stage: Full Loading and Secondary Compaction 1. Secondary unloading preparation: After confirming that the first vibration is completed, keep the mixing pot and the test mold coaxial. There is no need to adjust the equipment position. Directly start the plugging mechanism to open the discharge hole.

[0096] 2. Full discharge: The planetary mixer continues to rotate at a low speed to discharge all the remaining cement mortar into the test mold, and then the discharge hole is closed.

[0097] 3. Secondary vibration and leveling: The operator uses a tamping rod to vibrate again, using the same method as the first time, to ensure that the mortar adheres tightly to the mold.

[0098] V. Flowability Measurement Stage: Standard Oscillation and Dimensional Measurement 1. Confirmation of mold fixation: Check the clamping status of the mold by the clamping mechanism on the side of the material receiving plate to ensure that the mold remains coaxial with the material receiving plate after vibration, and avoid displacement during vibration.

[0099] 2. The lead screw drives the test mold to move vertically upward. 3. Standard oscillation: Start the lifting mechanism, which is coordinated by the spiral cam and the drive motor to complete 25 "rise-free fall" actions within 25 seconds in strict accordance with the standard, so that the mortar in the mold can be naturally flattened under the action of vibration.

[0100] 4. Flowability Measurement: After the vibration is complete, release the clamping mechanism and remove the mold. Use a ruler to measure the maximum diameter of the flattened mortar and the diameter perpendicular to it. The difference between the two measurements should be ≤2mm. Take the average value as the final flowability measurement result.

[0101] VI. Reset Phase: Equipment Return to Position and Cleaning 1. Mechanism reset: All clamping mechanisms open and reset, the mixing pot and the receiving tray return to their initial positions, the plugging mechanism remains closed, and the planetary mixer stops operating.

[0102] 2. Cleaning: Operators should promptly clean the mixing pot, mold, and tamping rod, and remove any residual material from the surface of the material receiving tray. For mortar, ensure that there is no material accumulation inside the equipment to prepare for the next test.

[0103] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cement mortar flowability measuring device, comprising a material receiving tray with a lifting mechanism on its lower side, characterized in that, A mixing device is provided on the upper side of the material receiving tray. The mixing device includes a mixing pot and a planetary mixing device. A set of clamping mechanisms is provided on the side of the mixing pot and the upper side of the material receiving plate. Each set of clamping mechanisms includes two contact ring plates that move left and right linearly under the action of a cylinder. At the same time, a lead screw pair is provided at the far end of the two contact ring plates of each set of clamping mechanisms. The lead screw pair drives the clamping mechanism to move up and down linearly. The mixing pot is provided with a discharge hole, and a plugging mechanism is provided in the discharge hole.

2. The cement mortar flowability measuring device according to claim 1, characterized in that: The mixing pot is a double-layered pot body, and the plugging mechanism is located between the double-layered pot body. The plugging mechanism includes a blocking plate with an inverted T-shaped structure on the vertical surface, and the outer diameter of the upper part of the blocking plate is equal to the inner diameter of the discharge hole. The blocking disc has an eccentrically opened internal threaded hole, and a screw is screwed into the internal threaded hole. The screw is rotatably connected to the stirring pot, and a driving component is provided on one side of the screw. The lower side of the blocking plate is provided with a protrusion, and a limit post is provided between the two layers of pot body for the protrusion on the blocking plate. The limit post and the screw are located on the left and right sides of the central axis of the blocking plate, respectively.

3. The cement mortar flowability measuring device according to claim 1, characterized in that: The planetary stirring device includes a follower tube, and multiple stirring blades are arranged on the outside of the follower tube; The follower tube is fixedly connected to a plurality of positioning tubes that communicate with the inner cavity of the follower tube. The plurality of positioning tubes correspond one-to-one with the plurality of stirring blades, and a limiting groove is opened through the positioning tube. The angle between the central axis of the limiting groove and the vertical plane is greater than 0° and less than 45°. Each of the stirring blades has a receiving groove at one end near the follower tube. The positioning tube is inserted into the corresponding receiving groove, and a limiting shaft is fixedly connected to the inside of the receiving groove. The limiting shaft is inserted into the limiting groove. When the limiting shaft moves from the end of the limiting groove near the follower tube to the end away from the follower tube, the angle between the stirring blade and the horizontal plane gradually decreases. At the same time, each stirring blade is fixedly connected to a counterweight at the end away from the follower tube.

4. The cement mortar flowability measuring device according to claim 3, characterized in that: The side end of the follower tube is provided with multiple layers of positioning tubes from top to bottom, and multiple positioning tubes in each layer are arranged at equal intervals around the central axis of the follower tube. In the multi-layer positioning tube at the side end of the follower tube, a reset mechanism is provided between the multi-layer positioning tubes located at opposite upper levels. The reset mechanism includes a reset spring. Each layer has a reset spring installed on the inner side of multiple positioning tubes along its central axis. One axial end of the reset spring is movably connected to the corresponding stirring blade, and the other axial end of the reset spring is movably connected to the inner cavity of the follower tube.

5. The cement mortar flowability measuring device according to claim 4, characterized in that: The reset mechanism also includes a positioning plate located inside the follower tube and fixedly connected to the inner wall of the follower tube. Each positioning plate is rotatably connected to multiple hook-shaped auxiliary drive blocks. The multiple auxiliary drive blocks correspond one-to-one with the multiple positioning tubes. The lightweight end of each auxiliary drive block is rotatably connected to the positioning plate, and the outer side of the heavy end of each auxiliary drive block is movably connected to the corresponding reset spring. Each auxiliary drive block has a tension spring movably connected to the inner side of its weight end. The other axial end of the tension spring is movably connected to the positioning plate. When the tension spring is not subjected to external force, the auxiliary drive block is located inside the positioning plate.

6. The cement mortar flowability measuring device according to claim 5, characterized in that: The mixing pot includes an inner pot body and an outer pot body. The inner pot body has multiple through holes, and a follower rod is slidably connected in the through holes. Furthermore, an elastic plate is provided on the side of each through hole near the central axis of the inner pot body, and the elastic plate is fixedly connected to the inner pot body. Each of the elastic plates is fixedly connected to the follower rod, and each elastic plate is projected as an elliptical structure in the vertical plane; A feeding mechanism is provided between the inner pot body and the outer pot body, and the feeding mechanism is connected to the follower rod for transmission.

7. The cement mortar flowability measuring device according to claim 5, characterized in that: The feeding mechanism includes a spiral feeding plate disposed between the inner pot body and the outer pot body. The spiral feeding plate has multiple feeding holes that are opened through it, and the multiple feeding holes correspond one-to-one with multiple elastic sheets. Each of the feeding holes is provided with a storage bin with an open structure at the top on the lower side. A baffle plate is slidably connected to the side of the storage bin near the inner pot body. The baffle plate is connected to the follower rod through a pull rope. The inner pot body has multiple discharge holes that are opened through it, and each discharge hole corresponds to a baffle plate.

8. The cement mortar flowability measuring device according to claim 7, characterized in that: A striking bar is provided on the lower side of the storage bin. The striking bar is elastically and slidably connected to the inner wall of the outer pot, and the striking bar abuts against the lower end face of the storage bin. A driven plate is fixedly connected to the outside of the follower rod. When the elastic plate abuts against the stirring blade, the driven plate pushes the striking rod to move away from the central axis of the inner pot. When the elastic plate does not contact the stirring blade, the driven plate does not contact the striking rod.

9. The cement mortar flowability measuring device according to claim 4, characterized in that: The stirring blade corresponding to the reset mechanism is blade I, and the remaining stirring blades are blade II. The angle between blade II and the horizontal plane is smaller than the maximum angle between blade I and the horizontal plane, and the angle between blade II and the horizontal plane is greater than the minimum angle between blade I and the horizontal plane.

10. A cement mortar flowability measuring device according to claim 3, characterized in that: The centerline of the stirring blade is a spiral structure. The angle formed between the end of the stirring blade away from the follower tube and the central axis of the follower tube is smaller than the angle formed between the end of the stirring blade near the follower tube and the central axis of the follower tube. At the same time, the angle formed between the end of the stirring blade away from the follower tube and the horizontal plane is larger than the angle formed between the end of the stirring blade near the follower tube and the horizontal plane.

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