Mixer truck with concrete slump detection device

Abstract

The invention discloses an agitating lorry with a concrete slump detection device, and relates to the technical field of concrete detection, the agitating lorry comprises a cylinder, the whole body is of a split structure, the cylinder comprises a plurality of same sub-cylinder parts which are distributed in a surrounding manner, and every two adjacent sub-cylinder parts are in sealed connection through a connecting part; an elastic interlayer covers the inner wall of each sub-cylinder part, a closed cavity is formed between the elastic interlayer and the inner wall of the corresponding sub-cylinder part, gas is injected into or discharged from the closed cavity, and the elastic interlayer can expand and protrude out of the plane of the inner wall of the sub-cylinder part or contract and cling to the inner wall of the sub-cylinder part; the bottom end of each sub-cylinder part can swing outwards relative to the top of the sub-cylinder part so that the cylinder body can be diverged and expanded from the bottom, and locking assemblies in one-to-one correspondence with the sub-cylinder parts are arranged on the periphery of the bottom of the cylinder body and used for limiting the swing action of the sub-cylinder parts. The concrete slump test device has the effect of improving the accuracy of the concrete slump test result.

Description

Technical Field

[0001] This application relates to the technical field of concrete testing, and in particular to a mixer truck equipped with a concrete slump testing device. Background Technology

[0002] Concrete transported in concrete mixer trucks needs to undergo a slump test before pouring. The slump test is a key indicator for measuring the workability of fresh concrete, which includes aspects such as fluidity, cohesiveness, and water retention. Different construction locations and pouring methods require concrete with different slumps. For example, concrete pumped by a concrete pump needs a larger slump to pass smoothly through the pipes, while ordinary beam, slab, and column pouring requires a moderate slump. The slump test can be used to determine whether the received concrete meets the requirements of the current construction project.

[0003] On construction sites, the general procedure for concrete slump testing involves using a standard-sized conical metal cylinder, also known as a slump cone. The slump cone is placed vertically on a flat surface. Concrete to be tested is added to the slump cone in multiple batches and compacted until it is completely filled. Then, the slump cone is quickly and vertically lifted until it is completely detached from the concrete. After being lifted, the concrete pile, now without lateral support, collapses and falls under its own weight. The difference between the height of the concrete pile's apex and the slump height is then measured; this difference is the slump value of the concrete. A higher slump value indicates greater concrete fluidity, and vice versa. Construction personnel will compare the measured slump value with the specified range according to design and construction requirements to determine whether the batch of concrete is up to standard.

[0004] During the slump test, because concrete contains cement paste, which has significant viscosity and surface wettability, it will have an interfacial adsorption effect with the metal slump cone. In addition, after the concrete is compacted, a large amount of air inside is expelled, and there are very few tiny gaps between the cone wall and the concrete. This causes the local pressure between the cone wall and the outer layer of concrete to be lower than the external atmospheric pressure, forming a negative pressure adsorption effect. All of these factors cause the outermost layer of concrete to stick to the inner wall of the cone and be lifted upwards when the slump cone is lifted, which raises the overall shape of the concrete pile and affects the accuracy of the final slump measurement. Summary of the Invention

[0005] To address the issue that the outermost layer of concrete adheres to the inner wall of the slump cone and is lifted upwards when the slump cone is raised, resulting in inaccurate slump measurements, this application provides a mixer truck equipped with a concrete slump detection device.

[0006] This application provides a concrete mixer truck equipped with a concrete slump detection device, employing the following technical solution: A concrete mixer truck equipped with a concrete slump detection device includes The vehicle body is equipped with a storage box for housing the concrete slump testing device. The concrete slump testing device includes a cylinder, which has a split structure. The cylinder includes multiple identical and circumferentially distributed sub-cylinders, and adjacent sub-cylinders are sealed together by a connecting part. Each sub-section's inner wall is covered with an elastic interlayer, forming a closed cavity between the elastic interlayer and the corresponding sub-section's inner wall. Gas is injected into or discharged into the closed cavity, and the elastic interlayer can expand and protrude from the sub-section's inner wall plane, or contract and tightly adhere to the sub-section's inner wall. Each sub-tube section has its bottom end able to swing outward relative to its top, allowing the tube to expand from the bottom. The outer periphery of the bottom of the tube is provided with locking components that correspond to each sub-tube section, which are used to limit the swinging motion of the sub-tube sections.

[0007] Optionally, a vibrating element is provided in the closed cavity between the elastic interlayer and the inner wall of the corresponding cylindrical section. The vibrating element is connected to an external power source through a wire and can generate vibration when energized. The vibrating element remains in contact with the inner surface of the elastic interlayer to transmit the vibration to the elastic interlayer.

[0008] Optionally, the inner wall of the split section is provided with a relief groove. The opening area and opening position of the relief groove correspond to the elastic interlayer corresponding to the split section. The elastic interlayer covers the relief groove. The wall thickness of the split section corresponding to the relief groove is less than the wall thickness of other areas of the split section. The vibrator is located in the corresponding relief groove.

[0009] Optionally, the vibrator is hinged to the inner wall of the split cylinder via a swing rod, and a return member is provided at the end of the swing rod away from the vibrator. The return member is used to keep the vibrator in contact with the inner surface of the elastic interlayer.

[0010] Optionally, a limiting ring is provided at the top of the cylinder, and all the sub-cylinders are distributed around the limiting ring, with the top of each sub-cylinder hinged to the outer wall of the limiting ring, so that the bottom end of each sub-cylinder can swing outward relative to the limiting ring.

[0011] Optionally, a base plate is provided at the bottom of the cylinder, the cylinder is placed vertically on the top surface of the base plate, a support assembly is provided on the top surface of the base plate to support the limiting ring and provide vertical guidance, and the locking assembly is provided on the top surface of the base plate.

[0012] Optionally, the locking assembly includes a locking cam and a locking rod. The locking cam is rotatably connected to the base plate on the outer side of the corresponding sub-section, and the axis of rotation is vertical. The locking rod is fixedly connected to the locking cam. When the locking cam rotates, it can abut against or disengage from the outer wall of the corresponding sub-section, thereby locking or releasing the swing motion of the sub-section.

[0013] Optionally, the support assembly includes a support plate and a guide plate. The support plate is vertically disposed on the top surface of the base plate and located on one side of the cylinder. The guide plate is horizontally disposed on the top of the cylinder through the support plate. A vertical lifting rod is disposed on the top surface of the limiting ring. The lifting rod passes upward and is vertically slidably connected to the guide plate.

[0014] In summary, this application includes at least one of the following beneficial effects: 1. By designing the cylinder as a split structure, the cylinder is composed of multiple sub-cylinders, and a limiting ring is set at the top of the cylinder. The top of each sub-cylinder is hinged to the outer wall of the limiting ring, so that the bottom of each sub-cylinder can swing outward a certain distance relative to the limiting ring. In addition, an elastic interlayer that can expand after inflation is set on the inner wall of each sub-cylinder. After expansion, the elastic interlayer can bulge outward to form an arc surface or spherical surface. Before expansion, the inner wall of the cylinder is close to the concrete pile inside, and concrete can continue to be filled or vibrated. After expansion, the elastic interlayer can increase the distance between the inner wall of the cylinder and the concrete inside. At this time, the sub-cylinders that make up the cylinder open outward under the push of the expanded elastic interlayer, thereby gradually separating the inner wall of the cylinder from the outer wall of the concrete pile. Then the cylinder can be easily lifted as a whole, which greatly reduces the adhesion strength between the inner wall of the cylinder and the concrete, so that the concrete pile can maintain the pile shape after vibration as much as possible, which helps to improve the accuracy of subsequent slump measurement. 2. Before inflation, the elastic interlayer is in close contact with the outer wall of the concrete pile. In the early stage of inflation, the elastic interlayer bulges uniformly. During this process, the contact area between the elastic interlayer and the concrete pile is large, allowing the elastic interlayer to exert a greater pushing force on the cylinder section when it bulges, so that the corresponding cylinder section has sufficient thrust to separate from the outer wall of the concrete. As inflation continues, the elastic interlayer gradually expands to form a more convex and rounded arc surface or sphere. During this process, the contact area between the elastic interlayer itself and the outer wall of the concrete pile gradually decreases. In a short time, the contact surface between the elastic interlayer and the concrete pile can be changed from surface contact to point contact, realizing the separation between the elastic interlayer and the concrete pile, and thus finally achieving complete separation between the cylinder and the concrete pile. 3. After the vibrator swings, it should remain in contact with the inner wall of the elastic interlayer. When vibrating and filling the concrete pile, the elastic interlayer can be inflated first. The elastic interlayer will be uniform and slightly raised, and the contact area between the elastic interlayer and the concrete pile will be the largest. At this time, stop the air supply and start the vibrator through the wire. The vibrator can fully transmit its vibration to the elastic interlayer, so that the slightly raised elastic interlayer will continue to vibrate at high frequency. The high frequency vibration of the elastic interlayer can fully vibrate and compact the outermost layer of the concrete pile. Attached Figure Description

[0015] Figure 1 This is a schematic diagram illustrating the overall structure of the detection device according to an embodiment of this application; Figure 2 This is a schematic diagram illustrating the external appearance of the detection device according to an embodiment of this application; Figure 3 yes Figure 2 An enlarged view at point A; Figure 4 This is a schematic diagram illustrating the structure of the limiting ring in an embodiment of this application; Figure 5 This is a cross-sectional schematic diagram illustrating the internal structure of the cylinder according to an embodiment of this application; Figure 6 This is a cross-sectional schematic diagram illustrating the initial state of the elastic interlayer inflated according to an embodiment of this application; Figure 7 This is a cross-sectional schematic diagram illustrating the final state of the elastic interlayer under inflation, according to an embodiment of this application. Figure 8 This is a schematic diagram illustrating the distribution of the detection devices in an embodiment of this application.

[0016] Explanation of reference numerals in the attached drawings: 1. Cylinder body; 11. Split cylinder section; 111. Receiving groove; 112. Relief groove; 113. Placement groove; 12. Limiting ring; 121. Lifting section; 122. Feeding section; 123. Lifting rod; 13. Elastic interlayer; 14. Flexible hose; 15. Vibrating element; 16. Swinging rod; 2. Support components; 21. Base plate; 22. Support plate; 23. Guide plate; 24. Fixing plate; 3. Locking assembly; 31. Locking cam; 32. Locking rod; 4. Connecting parts.

[0017] 5. Vehicle body; 51. Storage box; 52. Mixing tank. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0019] This application discloses a concrete mixer truck equipped with a concrete slump detection device, see reference. Figures 1 to 4 The concrete slump testing device includes a concrete-filled cylinder 1, a support assembly 2 that provides guidance and support for the lifting action of the cylinder 1, and a locking assembly 3 that clamps and fixes the cylinder 1.

[0020] For example, the cylinder 1 adopts a split structure design, that is, the cylinder 1 includes multiple identical sub-cylinders 11, which are arranged in a ring around each other to form a complete cylinder 1 structure. Each sub-cylinder 11 has a tile-like shape, and all the sub-cylinders 11 together form a complete cylinder 1. The complete cylinder 1 has a frustum shape, which is smaller at the top and larger at the bottom. The interior of the cylinder 1 can be used to hold concrete to be tested. In this embodiment, there are 4 sub-cylinders 11. In other embodiments, the number of sub-cylinders 11 can be adjusted to 3 or 5 according to actual needs, making the structure of the cylinder 1 more flexible and adaptable to meet the needs of use under different working conditions.

[0021] In some embodiments, a limiting ring 12 is provided at the top of the cylinder 1. The limiting ring 12 includes a lifting part 121 and a feeding part 122. Both the lifting part 121 and the feeding part 122 are annular. The lifting part 121 is placed horizontally and located above the cylinder 1, while the feeding part 122 is a cone shape with a larger top and a smaller bottom. The top of the feeding part 122 is fixedly connected to the inner edge of the lifting part 121. The bottom of the feeding part 122, which is inclined downward, is flush with or slightly lower than the top of the cylinder 1. The cone-shaped feeding part 122 can smoothly guide concrete into the cylinder 1 when filling concrete. A vertical lifting rod 123 is detachably connected to the top surface of the lifting part 121. The lifting rod 123 allows the operator to manually lift the cylinder 1. In this embodiment, two lifting rods 123 are provided, and the two lifting rods 123 are symmetrically installed on the top surface of the lifting part 121. The detachable connection between the lifting part 121 and the lifting rod 123 is preferably a threaded connection or a snap-fit ​​connection, which facilitates quick installation and removal of the lifting rod 123 during use.

[0022] Furthermore, the top ends of all the sub-tube sections 11 are hinged to the outer wall of the feeding section 122. Each sub-tube section 11 can rotate around the hinge point, and the bottom end of the corresponding sub-tube section 11 can swing outward or retract inward relative to the limiting ring 12 to form a complete cylinder 1. Adjacent sub-tube sections 11 are sealed together by a connecting part 4. The connecting part 4 is preferably made of a flexible and highly elastic waterproof material, such as silicone rubber or EPDM rubber, which gives the connecting part 4 good deformation resilience and extensibility. This ensures that when each sub-tube section 11 swings outward, the connecting part 4 can extend itself to adapt to the opening gap between adjacent sub-tube sections 11, and return to its original shape after the sub-tube section 11 retracts and closes, maintaining the sealing of the cylinder 1.

[0023] To ensure that the connecting part 4 does not interfere with the normal deformation of the cylindrical section 11 during its expansion and contraction, each cylindrical section 11 has a receiving groove 111 on both side walls. The receiving grooves 111 of two adjacent cylindrical sections 11 are correspondingly arranged, so that when two adjacent cylindrical sections 11 are closed, the corresponding two receiving grooves 111 together form an installation space for accommodating the connecting part 4. The four sides of the connecting part 4 are embedded in the inner side wall of the receiving groove 111 of the cylindrical section 11. When the cylindrical section 11 is closed, it will not protrude from the inner side wall surface of the cylindrical section 11, ensuring that the inner wall of the cylinder 1 is flat and smooth, avoiding interference with the concrete sample. When the cylindrical section 11 expands outward, the connecting part 4 is stretched and extended accordingly, filling the gradually increasing gap. To ensure that the connecting part 4 maintains structural stability during repeated stretching and retraction, the four sides of the connecting part 4 are fixed to the side edges of the adjacent cylindrical section 11 by high-strength bonding or mechanical pressing, ensuring reliable sealing and preventing it from falling off.

[0024] Understandably, when a slump test is required, all the sub-cylinders 11 are first locked and fixed using the locking assembly 3, forming a tightly closed and complete cylinder 1 to ensure the sealing and stability of the sample forming space. Then, concrete is gradually poured in from the opening of the feeding section 122 and vibrated. After vibration, before vertically lifting the cylinder 1 using the lifting rod 123, the locking assembly 3 is released, releasing each sub-cylinder 11 from its locked state. Then, each sub-cylinder 11 is allowed to swing outwards around its hinge point. Because the cylinder 1 has a conical structure that is smaller at the top and larger at the bottom, therefore… After vibration, the concrete pile formed inside the cylinder 1 also forms a cone shape that is smaller at the top and larger at the bottom. When the bottom end of the sub-cylinder 11 expands outward and separates from the outer wall surface corresponding to the bottom of the concrete pile, the inner wall surface of the remaining part of the sub-cylinder 11 will also completely separate from the outer wall surface of the concrete pile. At this time, by applying force vertically upward through the lifting rod 123, each sub-cylinder 11 can be lifted synchronously and smoothly, effectively avoiding the inner wall of the cylinder 1 from scraping or sticking to the concrete sample when it is lifted, ensuring that the free expansion shape of the collapsed concrete is not disturbed, and truly reflecting its flow performance.

[0025] For example, refer to Figures 5 to 7 Each section 11 has an elastic interlayer 13 covering its inner wall. The elastic interlayer 13 is preferably made of highly elastic, high-strength, and smooth silicone rubber or a special polyurethane film material, which effectively reduces the adhesion of the elastic interlayer 13 surface to the concrete. The actual thickness of the elastic interlayer 13 is controlled between 0.5 mm and 1 mm, which ensures that the elastic interlayer 13 has sufficient ductility and resilience, and also ensures that the elastic interlayer 13 itself can effectively transmit high-frequency vibration energy.

[0026] Each cylindrical section 11 has a relief groove 112 on its inner wall. The wall thickness of the cylindrical section 11 at the relief groove 112 is less than the wall thickness of other areas of the cylindrical section 11. The opening area and opening position of the relief groove 112 correspond to the elastic interlayer 13. The elastic interlayer 13 covers the corresponding relief groove 112. The four perimeters of the elastic interlayer 13 are respectively fixed to the inner side of the groove wall of the relief groove 112 of the cylindrical section 11. The elastic interlayer 13 can achieve a sealed and firm fit of the groove wall edge of the relief groove 112 through a hot pressing molding process, or the four sides of the elastic interlayer 13 can be pressed and fixed to the inner side of the groove wall of the relief groove 112 directly through a combination of pressure plate and fastening bolts. A closed cavity is formed between the elastic interlayer 13 and the inner wall of the corresponding section 11. A flexible hose 14 is provided on the outer wall of the section 11 at the position corresponding to the elastic interlayer 13. One end of the flexible hose 14 passes through the wall of the section 11 and is connected to the closed cavity. The other end of the flexible hose 14 can be connected to an electric air pump (not shown). The electric air pump is usually designed with a two-way airflow function, which can both inflate and deflate. Concrete mixer trucks are generally equipped with an on-board air source. The flexible hose 14 can be quickly connected to the air source interface of the concrete mixer truck through the electric air pump. In the initial state, the elastic interlayer 13 remains flush and fitted with the inner wall of the corresponding section 11.

[0027] Understandably, when it is necessary to separate the sub-cylinder 11 from the concrete pile, an electric air pump can be started and gas can be injected into the closed cavity through the hose 14. The air pressure in the closed cavity gradually increases and pushes the elastic interlayer 13 to bulge and expand outward. After expansion, the elastic interlayer 13 can form an outward convex arc surface or spherical surface. At this time, the expanded elastic interlayer 13 applies a radial thrust to the outer wall of the concrete pile. The elastic interlayer 13, together with the corresponding sub-cylinder 11, is subjected to a reaction force and expands outward and swings outward, thereby realizing the rapid separation of each sub-cylinder 11 from the outer wall of the concrete pile.

[0028] Specifically, before the elastic interlayer 13 is inflated, the inner wall of the cylinder 1 is tightly attached to the internal concrete pile, at which point concrete can continue to be filled or vibrated. Subsequently, in the initial stage of the elastic interlayer 13's inflation, the air pressure in the closed cavity between the elastic interlayer 13 and the corresponding sub-cylinder 11 increases uniformly, and the elastic interlayer 13 bulges uniformly as a whole. During this process, the contact area between the elastic interlayer 13 and the concrete pile is large, and almost the entire surface of the elastic interlayer 13 is in contact with the outer wall of the concrete pile. This allows the elastic interlayer 13 to exert a larger and more uniform pushing force on the outer wall of the concrete pile when it initially bulges, reducing damage to the outer wall of the concrete pile. Conversely, the reaction force generated in this process can quickly separate the corresponding sub-cylinder 11 from the outer wall of the concrete pile. As inflation continues, the elastic interlayer 13 gradually expands, forming a more convex and rounded arc or spherical surface. During this process, the contact area between the elastic interlayer 13 and the outer wall of the concrete pile gradually decreases. In a short time, the contact surface between the elastic interlayer 13 and the concrete pile can be changed from a large surface contact to a very small point or line contact, thereby achieving complete separation between the elastic interlayer 13 and the concrete pile. This also effectively reduces the adhesion of concrete or cement slurry to the elastic interlayer 13. Subsequently, the cylinder 1 can be easily lifted as a whole, allowing the concrete pile to maintain its post-vibration pile shape as much as possible. After the cylinder 1 is fully lifted, the electric air pump switches to exhaust mode, and the gas in the closed cavity is discharged through the hose 14. The elastic interlayer 13 gradually contracts and returns to its initial state of tightly adhering to the inner wall of the cylinder section 11.

[0029] In some embodiments, a vibrating element 15 is disposed within the closed cavity between the elastic interlayer 13 and the inner wall of the corresponding sub-cylinder 11. The vibrating element 15 includes a vibrating head capable of high-frequency vibration and a housing for accommodating the vibrating head. The vibrating head of the vibrating element 15 remains in contact with the inner wall of the corresponding elastic interlayer 13, thereby transmitting the high-frequency vibration of the vibrating head to the elastic interlayer 13. The vibrating element 15 can be connected to an external power source on the mixer truck via a wire, and when energized, the vibrating element 15 generates high-frequency vibration on the vibrating head.

[0030] The vibrating element 15 is hinged to the inner wall of the sub-cylinder 11 via a swing rod 16. One end of the swing rod 16 is fixedly connected to the outer shell of the vibrating element 15, and the other end is hinged to the inner wall of the corresponding sub-cylinder 11 via a rotating rod. A placement groove 113 is provided on the inner wall of the sub-cylinder 11 corresponding to the vibrating element 15. The placement groove 113 is correspondingly provided on the inner wall of the corresponding clearance groove 112 of the sub-cylinder 11. The placement groove 113 can simultaneously accommodate the vibrating element 15 and the swing rod 16, so that when the vibrating element 15 and the swing rod 16 are embedded in the placement groove 113, they just fill the depression of the placement groove 113. In order to keep the vibrating head of the vibrating element 15 in contact with the elastic interlayer 13, a return element is provided on the rotating rod of the swing rod away from the vibrating element 15. The return element is preferably a torsion spring, and the two ends of the return element abut against the rotating rod and the inside of the sub-cylinder 11, respectively. When the elastic interlayer 13 expands due to inflation, the elastic interlayer 13 detaches from the inner wall of the split cylinder 11. The restoring force generated by the torsion of the return member drives the swing rod 16 to swing in the direction of the elastic interlayer 13. The swing rod 16 drives the vibrator 15 to swing synchronously, so that the vibrating head on the vibrator 15 can maintain contact with the inner surface of the elastic interlayer 13.

[0031] Understandably, when compacting the concrete pile, air can first be pumped into the closed cavity using an electric air pump to put the elastic interlayer 13 into an initial state of inflation. At this time, the elastic interlayer 13 is uniform and slightly raised, and the contact area between the elastic interlayer 13 and the concrete pile is at its maximum. Then, the air supply is stopped while maintaining the internal air pressure of the closed cavity, and the vibrator 15 is started. The vibrator head on the vibrator 15 generates high-frequency vibration. Since the vibrator head is in contact with the elastic interlayer 13, the vibrator head can fully transmit its vibration to the elastic interlayer 13, so that the slightly raised elastic interlayer 13 continuously vibrates at a high frequency. This high-frequency vibration is then transmitted through the elastic interlayer 13 to the outer wall of the concrete pile that is in close contact with it, thereby effectively compacting the outermost layer of concrete in the concrete pile and eliminating internal air bubbles. During a conventional slump test, the outermost layer of concrete in contact with the inner wall of the slump cone tends to set first due to rapid water loss, forming a hard shell that hinders the migration of internal moisture and the release of air bubbles. The elastic interlayer 13 with high-frequency vibration can be used to fully disturb the outermost layer of concrete, destroying the initial set hard shell structure, allowing the internal moisture to redistribute, and enabling air bubbles to rise and be released smoothly, thereby improving the overall density and uniformity of the concrete.

[0032] For example, refer to Figure 1 and Figure 2To ensure that the cylinder 1 can be lifted while remaining vertical, the support assembly 2 includes a base plate 21, a support plate 22, and a guide plate 23. The base plate 21 is placed horizontally on the ground, and the cylinder 1 is placed vertically on the base plate 21. The support plate 22 is vertically fixed to the top surface of the base plate 21. In this embodiment, there are two support plates 22 distributed on both sides of the cylinder 1. Each support plate 22 has a fixed plate 24 hinged to its top. The fixed plate 24 can be flipped inward relative to the support plate 22. One of the support plates 22 is taller than the other. When the fixing plate 24 on the shorter support plate 22 is flipped outward, it is horizontally placed on the top of the upright cylinder 1. When the fixing plate 24 on the taller support plate 22 is flipped inward, it is horizontally stacked on top of the other fixing plate 24. Thus, when the cylinder 1 is not in use, the two fixing plates 24 are stacked to form a limiting structure for the cylinder 1, making the whole device more in line with the compact requirements of vehicle transportation, and at the same time preventing the cylinder 1 from tipping over or shifting during movement.

[0033] In some embodiments, to prevent the fixed plate 24 from folding outward, a limiting plate is fixed to the top of the support plate 22 on the outer side of the corresponding fixed plate 24. When the fixed plate 24 is in a vertical state, the outer edge of the fixed plate 24 abuts against the limiting plate, thereby limiting the rotation angle of the fixed plate 24. Vertical grooves are vertically formed on the inner sidewalls of both fixed plates 24. The two ends of the guide plate 23 are slidably connected to the grooves of the two fixed plates 24, allowing the guide plate 23 to slide up and down along the fixed plates 24 in a horizontal state. The lifting rod 123 at the top of the cylinder 1 is vertically inserted and slidably connected to the guide plate 23, providing stable guidance for the lifting rod 123's raising and lowering. A vertical reinforcing cylinder is fixed to the bottom of the guide plate 23 corresponding to the position of the lifting rod 123. The reinforcing cylinder is sleeved around the outer periphery of the lifting rod 123, further improving guiding stability. Locking bolts or locking rods can be provided between the two ends of the guide plate 23 and the fixed plate 24, so that the guide plate 23 can be locked and fixed to the fixed plate 24 after it is adjusted to the required height.

[0034] In some embodiments, to ensure that the various sections 11 of the cylinder 1 remain in close contact during concrete filling, the locking assembly 3 includes a corresponding locking cam 31 and locking rod 32. The locking cam 31 and locking rod 32 are respectively disposed on the outer side of each section 11. The locking cam 31 is rotatably connected to the base plate 21. The rotation axis of the locking cam is vertical and eccentrically set. One end of the locking rod 32 is fixedly connected to the axis of the locking cam 31, and the other end extends outward and is integrally formed with a gripping part. Rotating the locking rod 32 will synchronously rotate the locking cam 31.

[0035] The outer wall of the protruding part of the locking cam 31 is covered with an anti-slip rubber pad. When the anti-slip rubber pad is in close contact with the outer wall of the corresponding sub-cylinder 11, it can increase the frictional resistance and prevent the locking cam 31 from rotating on its own under vibration and thus loosening. When the locking rod 32 is in the unlocked position, the radius of the locking cam 31 is small and does not contact the outer wall of the sub-cylinder 11, so it has no force on the sub-cylinder 11. When the locking rod 32 is rotated to the locked position, the long radius part of the locking cam 31 will forcefully push the outer wall of the bottom end of the corresponding sub-cylinder 11. After all the locking components 3 act at the same time, a uniform radial pressure can be applied to all the sub-cylinders 11, so that they are tightly fitted to form a complete cylinder 1.

[0036] For example, refer to Figure 2 and Figure 8 The mixer truck includes a vehicle body 5, on which a mixing tank 52 is tilted and rotatably mounted. To facilitate the placement of the concrete slump testing device, a storage box 51 is fixed to the side of the mixing tank 52 on the vehicle body 5. The storage box 51 has a shielding door that can be opened and closed. After the testing device removes the fixing plate 24 and the lifting rod 123, the guide plates 23 on both sides are folded inward and covered on the cylinder 1, so that the entire testing device is folded into a compact module. At this time, the testing device can be fixed by threading a fixing rope or fixing chain through the fixing rings around the base plate 21.

[0037] The implementation principle of a concrete mixer truck with a concrete slump detection device according to an embodiment of this application is as follows: the cylinder 1 is split, and the bottom end of each cylinder 11 can swing outward relative to the limiting ring 12, thereby separating from the concrete. When filling concrete, all cylinders 11 are locked and fixed by the locking assembly 3 to form a complete cylinder 1 structure. During vibration, gas is introduced into the closed cavity between the elastic interlayer 13 and the inner wall of the cylinder 11, causing the elastic interlayer 13 to expand slightly and increase the distance between it and the outer wall of the concrete pile. Contact area, at this time the vibrating head of the vibrator 15 contacts the elastic interlayer 13, the vibrator 15 is started, the vibrating head transmits high frequency vibration to the elastic interlayer 13, and then transmits the vibration evenly to the entire outer surface of the concrete pile, so as to achieve uniform compaction of the concrete pile; after the vibration is completed, gas continues to be filled into the closed cavity, so that the elastic interlayer 13 expands further, pushing the concrete to completely separate from the inner wall of the cylinder 11, and then the lifting rod 123 is lifted upward to remove the cylinder 1 as a whole from the concrete pile, and the demolding is completed.

[0038] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0039] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0040] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A concrete mixer truck equipped with a concrete slump detection device, characterized in that: include The vehicle body (5) is equipped with a storage box (51) for accommodating the concrete slump detection device. The concrete slump testing device includes a cylinder (1), which is a split structure. The cylinder (1) includes multiple identical and surrounding cylindrical sections (11), and adjacent cylindrical sections (11) are sealed together by a connecting part (4). Each sub-tube (11) has an inner wall covered with an elastic interlayer (13). The elastic interlayer (13) and the inner wall of the corresponding sub-tube (11) form a closed cavity. Gas is injected into or discharged into the closed cavity. The elastic interlayer (13) can expand and protrude out of the inner wall plane of the sub-tube (11), or contract and stick tightly to the inner wall of the sub-tube (11). Each sub-tube section (11) can swing outward relative to its top so that the tube body (1) can expand from the bottom. The outer periphery of the bottom of the tube body (1) is provided with locking components (3) corresponding to each sub-tube section (11) to limit the swinging action of the sub-tube section (11).

2. The mixer truck with concrete slump detection device according to claim 1, characterized in that: A vibrating element (15) is provided in the closed cavity between the elastic interlayer (13) and the inner wall of the corresponding cylindrical part (11). The vibrating element (15) is connected to an external power source through a wire and can generate vibration when powered on. The vibrating element (15) remains in contact with the inner surface of the elastic interlayer (13) to transmit the vibration to the elastic interlayer (13).

3. The mixer truck with concrete slump detection device according to claim 2, characterized in that: The elastic interlayer (13) is disposed in the lower part of the inner wall of the corresponding cylindrical part (11). After the elastic interlayer (13) expands, it forms an inwardly convex arc surface or spherical surface.

4. The mixer truck with concrete slump detection device according to claim 3, characterized in that: The inner wall of the split section (11) is provided with a relief groove (112). The opening area and opening position of the relief groove (112) correspond to the elastic interlayer (13) corresponding to the split section (11). The elastic interlayer (13) covers the relief groove (112). The wall thickness of the split section (11) corresponding to the relief groove (112) is less than the wall thickness of other areas of the split section (11). The vibrating element (15) is located in the corresponding relief groove (112).

5. The mixer truck with concrete slump detection device according to claim 4, characterized in that: The vibrating element (15) is hinged to the inner wall of the split cylinder (11) via a swing rod (16). A return element is provided at the end of the swing rod (16) away from the vibrating element (15). The return element is used to keep the vibrating element (15) in contact with the inner surface of the elastic interlayer (13).

6. The mixer truck with concrete slump detection device according to claim 1, characterized in that: The top of the cylinder (1) is provided with a limiting ring (12), and all the sub-cylinders (11) are distributed around the limiting ring (12). The top of each sub-cylinder (11) is hinged to the outer wall of the limiting ring (12) so that the bottom end of each sub-cylinder (11) can swing outward relative to the limiting ring (12).

7. The mixer truck with concrete slump detection device according to claim 6, characterized in that: The bottom of the cylinder (1) is provided with a base plate (21), the cylinder (1) is placed vertically on the top surface of the base plate (21), the top surface of the base plate (21) is provided with a support component (2) for supporting the limiting ring (12) and providing vertical guidance, and the locking component (3) is provided on the top surface of the base plate (21).

8. The mixer truck with concrete slump detection device according to claim 7, characterized in that: The locking assembly (3) includes a locking cam (31) and a locking rod (32). The locking cam (31) is rotatably connected to the base plate (21) on the outer side of the corresponding sub-cylinder (11), and the axis of rotation is vertical. The locking rod (32) is fixedly connected to the locking cam (31). When the locking cam (31) rotates, it can abut against or disengage from the outer wall of the corresponding sub-cylinder (11), thereby locking or releasing the swing motion of the sub-cylinder (11).

9. The mixer truck with concrete slump detection device according to claim 7, characterized in that: The support assembly (2) includes a support plate (22) and a guide plate (23). The support plate (22) is vertically arranged on the top surface of the bottom plate (21) and located on one side of the cylinder (1). The guide plate (23) is horizontally arranged on the top of the cylinder (1) through the support plate (22). The top surface of the limiting ring (12) is provided with a vertical lifting rod (123). The lifting rod (123) passes upward and is vertically slidably connected to the guide plate (23).

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