A device for adding concrete quick-setting agent and preventing solidification

Abstract

This invention belongs to the field of concrete preparation technology, specifically a concrete accelerator addition and anti-solidification device, including a support frame; a flat-mouthed mixing drum is clamped onto the support frame; a feed hopper and a discharge hopper are respectively arranged on both sides of the flat-mouthed mixing drum; a top sealing plate is rotatably connected to the top of the flat-mouthed mixing drum; a rotating shaft is fixedly connected to the center of the bottom of the top sealing plate; air is introduced through an air inlet pipe, and the airflow guides the accelerator into the closed hood, and then through multiple air inlets into the flat-mouthed mixing drum, achieving a uniform mixing effect on the concrete in the flat-mouthed mixing drum. In addition, when the accelerator is added, the air inlet squeezes the sealing plug at the air inlet, and the annular blade at the bottom of the sealing plug cleans the side of the air inlet adjacent to the concrete, preventing impurities from clogging the air inlet, which would prevent the accelerator from being discharged from the local air inlet, affecting the addition of the accelerator, and increasing the error in the ratio of accelerator to concrete.

Description

Technical Field

[0001] This invention belongs to the field of concrete preparation technology, specifically a device for adding concrete quick-setting agent and preventing solidification. Background Technology

[0002] Concrete is usually mixed at a batching plant and then transported to various construction sites by tanker trucks. However, for construction sites with smaller concrete requirements, on-site mixing may be used to prepare concrete.

[0003] When preparing concrete on site, aggregates, cement, and other materials are added to a flat-mouthed mixing drum. The drum's rotating shaft and mixing blades are used to mix the raw materials. To improve the setting speed of the concrete prepared in the drum, a certain amount of accelerator is usually added according to the mix proportion during the concrete mixing process. This allows the prepared concrete to initially set and reach a certain strength in a short time.

[0004] When adding accelerators to a flat-mouth mixing drum, operators control the addition speed and amount of accelerators during the addition phase to ensure uniform mixing with the concrete. However, this method of adding accelerators, due to the open shape of the mixing drum and the lightweight nature of the powdered accelerator, results in some loss of accelerators over a prolonged period, leading to errors in the concrete-accelerator ratio and hindering control over the initial setting time of the concrete. Existing technologies also employ sealing the flat-mouth mixing drum with a cap to prevent loss of accelerators and concrete raw materials. However, in these technologies, accelerators fed through holes in the cap or through a connected hopper will come into contact with concrete material adhering to the bottom of the cap, causing partial solidification and blocking the channel for injecting the accelerator into the mixing drum, making it difficult to add the accelerator.

[0005] Therefore, the present invention provides a device for adding concrete quick-setting agent to prevent solidification. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by this invention to solve its technical problem is as follows: A concrete accelerator addition and anti-solidification device according to this invention includes a support frame; a flat-mouthed mixing drum is clamped onto the support frame; a feed hopper and a discharge hopper are respectively arranged on both sides of the flat-mouthed mixing drum; a top sealing plate is rotatably connected to the top of the flat-mouthed mixing drum; a rotating shaft is fixedly connected to the center of the bottom of the top sealing plate; the bottom end of the rotating shaft passes through the flat-mouthed mixing drum; multiple stirring plates are fixedly connected to the top sealing plate by nuts; a closed cover is fixedly connected to the top of the top sealing plate by screws, and a filling hopper is fixedly connected to the top of the closed cover by a flange; the filling hopper is used to add accelerator; an air inlet is opened on the top sealing plate corresponding to the closed cover; a cleaning mechanism is provided inside the air inlet, and the cleaning mechanism is used to clean residual concrete inside the air inlet.

[0008] Preferably, the enclosed cover has a fan-shaped structure and multiple cavities are provided inside the enclosed cover, and the multiple cavities are interconnected; the top of the enclosed cover is connected to a connecting pipe, and the side of the connecting pipe is connected to an air inlet pipe; the multiple cavities are connected to the filling hopper via the connecting pipe.

[0009] Preferably, the cleaning mechanism includes a fixed support, which is fixedly connected to the bottom of the top sealing plate corresponding to the air inlet; a sealing sleeve is connected through the air inlet; a connecting shaft is fixedly connected to the bottom of the fixed support, and the sealing sleeve is connected through the top of the connecting shaft; a first spring is sleeved on the bottom of the connecting shaft, and the two ends of the first spring abut against the sealing sleeve and the fixed support.

[0010] Preferably, the sealing sleeve has a conical structure, and the diameter of the end of the sealing sleeve near the closed cover is smaller than the diameter of the end of the sealing sleeve near the fixed support; a sealing plug is fixedly connected to the outer side of the end of the sealing sleeve near the fixed support, and the sealing plug slides in fit with the inner wall of the air inlet; an annular cutting edge is provided at the bottom of the end of the sealing sleeve near the fixed support, and the annular cutting edge slides in fit with the air inlet.

[0011] Preferably, a sealing mechanism is slidably fitted on the outer side of the discharge hopper, and the sealing mechanism is used to seal unmixed concrete; the sealing mechanism includes a blocking plate; curved arms are fixedly connected to both sides of the blocking plate; a first sliding groove is opened on both sides of the discharge hopper; the inner side of the bottom end of the curved arm is slidably fitted with the first sliding groove on the outer side of the discharge hopper; two symmetrically arranged crossbeams are fixedly connected to the bottom of the support frame, and a cylinder is rotatably connected to the crossbeam; the output end of the cylinder is hinged to the bottom end of the outer wall.

[0012] Preferably, the blocking plate includes a fixed plate and a movable plate; the fixed plate and the movable plate are slidably fitted; connecting ribs are fixedly connected to both sides of the fixed plate; the bent arm is fixedly connected to the top of the connecting ribs; a fixed block is fixedly connected to the outside of the movable plate, and sliding rods are fixedly connected to both ends of the fixed block; the sliding rods are slidably connected in the connecting ribs.

[0013] Preferably, a spring rod is fixedly connected to the top of the fixed block, and the top of the spring rod passes through the top of the bent arm; the top of the movable plate is provided with a bend, and the bend cooperates with the opening of the discharge hopper.

[0014] Preferably, a slider is fixedly connected to the inner side of the bottom end of the curved arm; a second sliding groove is provided at the bottom of the connecting rib; the slider slides in conjunction with the second sliding groove.

[0015] Preferably, the outer side of the flat-mouthed stirring drum is fixedly connected to a plurality of snap-fit ​​ribs arranged in a ring array; a stop rod is fixedly connected to the middle of the support frame corresponding to the snap-fit ​​ribs; the stop rod engages with the snap-fit ​​ribs.

[0016] Preferably, a lead screw is fixedly connected to the top of the stirring plate, and the lead screw is fixedly connected to the top sealing plate by a nut; a transmission disc is fixedly connected to the bottom end of the rotating shaft; an output disc is provided on one side of the transmission disc; the output disc and the transmission disc are driven by a belt.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. The concrete accelerator addition and anti-solidification device of the present invention introduces air through an air inlet pipe, and uses airflow to guide the accelerator into a closed hood, and then through multiple air inlets into a flat-mouth mixing drum to achieve a uniform mixing effect on the concrete in the flat-mouth mixing drum. In addition, when the accelerator is added, the air inlet squeezes the sealing plug at the air inlet, and uses the annular blade at the bottom of the sealing plug to clean the side of the air inlet adjacent to the concrete, preventing impurities from clogging the air inlet, which would prevent the accelerator from being discharged from the local air inlet, affecting the addition of the accelerator, and increasing the error in the ratio of accelerator to concrete.

[0019] 2. The concrete quick-setting agent feeding and anti-solidification device of the present invention, by setting a sealing mechanism, when the sealing mechanism slides from near the flat-mouth mixing drum to the outer end of the discharge hopper, the bottom of the sealing plate will create a gap with the inner wall of the discharge hopper. The creation of the gap prevents the sealing mechanism from being unable to open and close smoothly due to the presence of solidified concrete on the surface of the discharge hopper. When the sealing mechanism is closed, the gap between the sealing plate and the inner wall of the discharge hopper will gradually shrink until the sealing plate completely blocks the channel between the flat-mouth mixing drum and the discharge hopper. During the opening and closing process of the sealing mechanism, the obliquely arranged first sliding groove can reduce the impact of solidified concrete on the surface of the discharge hopper when the sealing mechanism is opened and closed. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a perspective view of Embodiment 1 of the present invention;

[0022] Figure 2 This is an exploded perspective view of Embodiment 1 of the present invention;

[0023] Figure 3 This is a perspective view of the top sealing plate, stirring plate, and enclosed cover in Embodiment 1 of the present invention;

[0024] Figure 4 This is a perspective view of the enclosed cover and air inlet in Embodiment 1 of the present invention;

[0025] Figure 5 This is a first perspective view of the blocking mechanism in Embodiment 1 of the present invention;

[0026] Figure 6 This is a second perspective view of the blocking mechanism in Embodiment 1 of the present invention;

[0027] Figure 7 This is a partial cross-sectional view of the blocking mechanism in Embodiment 1 of the present invention;

[0028] Figure 8 This is a perspective view of the cleaning mechanism in Embodiment 1 of the present invention;

[0029] Figure 9 This is a bottom view of the fixed support, stirring plate, and cleaning mechanism in Embodiment 1 of the present invention;

[0030] Figure 10 This is a bottom view of Embodiment 1 of the present invention;

[0031] Figure 11 yes Figure 10 AA section sectional view;

[0032] Figure 12 This is a partial cross-sectional view of the flat-mouthed stirring cylinder in Embodiment 2 of the present invention.

[0033] In the diagram: 1. Support frame; 11. Crossbeam; 12. Cylinder; 13. Push rod; 14. Transmission disc; 15. Output disc; 16. Belt; 2. Flat-mouth mixing drum; 21. Feed hopper; 22. Discharge hopper; 23. Snap-fit ​​rib; 24. Stop bar; 25. Connecting rod; 26. Baffle; 3. Sealing mechanism; 31. Fixed plate; 32. Movable plate; 33. Connecting rib; 34. Bent arm; 35. Sliding block; 36. Second slide groove; 37. Fixed block; 38. Spring rod; 39. First slide groove; 4. Filling hopper; 5. Enclosed cover; 51. Air inlet pipe; 6. Top sealing plate; 61. Air inlet; 62. Fixed support; 63. Sealing sleeve; 64. Sealing plug; 65. Connecting shaft; 66. First spring; 7. Stirring plate; 71. Lead screw; 8. Rotating shaft. Detailed Implementation

[0034] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0035] Example 1

[0036] like Figures 1 to 2 , Figures 10 to 11 As shown in the embodiment of the present invention, a concrete accelerator addition and anti-solidification device includes a support frame 1; a flat-mouthed mixing drum 2 is clamped onto the support frame 1; a feed hopper 21 and a discharge hopper 22 are respectively provided on both sides of the flat-mouthed mixing drum 2; a top sealing plate 6 is rotatably connected to the top of the flat-mouthed mixing drum 2; a rotating shaft 8 is fixedly connected to the center of the bottom of the top sealing plate 6; the bottom end of the rotating shaft 8 passes through the flat-mouthed mixing drum 2; multiple stirring plates 7 are fixedly connected to the top sealing plate 6 by nuts; a closed cover 5 is fixedly connected to the top of the top sealing plate 6 by screws, and a filling hopper 4 is fixedly connected to the top of the closed cover 5 by a flange; the filling hopper 4 is used to add accelerator; an air inlet 61 is provided on the top sealing plate 6 corresponding to the closed cover 5; a cleaning mechanism is provided inside the air inlet 61, which is used to clean residual concrete inside the air inlet 61. To address the issue of accelerators being lost due to their light weight during addition in existing technologies, this equipment utilizes a flat-mouth mixing drum 2 to prepare concrete. After the concrete is thoroughly mixed, a specific ratio of accelerator is injected through a hopper 4. During accelerator addition, the hopper 4 is connected to a closed enclosure 5. The closed enclosure 5 is fixed to a top sealing plate 6, allowing the accelerator to be evenly distributed throughout the flat-mouth mixing drum 2 via multiple air inlets 61 as it enters the cavity between the closed enclosure 5 and the top sealing plate 6. The sealing effect of the top sealing plate 6 prevents some loss of the accelerator during addition. Furthermore, to prevent the concrete from reacting with residual accelerator at the air inlet 61 and causing blockage, a cleaning mechanism is used to clean the air inlet 61 during accelerator addition, preventing blockage caused by foreign objects. This ensures that the air inlet 61 is not blocked by foreign matter, allowing the accelerator to pass through in certain areas.

[0037] like Figures 2 to 4 As shown, the enclosed cover 5 has a fan-shaped structure and multiple cavities are provided inside the enclosed cover 5, and the multiple cavities are interconnected; the top of the enclosed cover 5 is connected to a connecting pipe, and the side of the connecting pipe is connected to an air inlet pipe 51; the multiple cavities are connected to the hopper 4 via the connecting pipe. In order to enable the accelerator added through the hopper 4 to be added to the concrete in the mixing process more quickly and fully, when the accelerator is added through the hopper 4, air can be introduced through the air inlet pipe 51. The airflow guides the powdered accelerator through the enclosed cover 5 and the air inlet 61 into the flat-mouth mixing drum 2, so as to achieve full mixing of the concrete. There are multiple air inlets 61, and the multiple air inlets 61 are evenly distributed on the top sealing plate 6. When accelerator is discharged from all air inlets 61, it can better promote the uniform mixing of the quantitative accelerator with the concrete, improve the rapid setting performance of the concrete, and benefit the construction personnel in subsequent construction.

[0038] like Figure 3 , Figures 8 to 9 As shown, the cleaning mechanism includes a fixed support 62, which is fixedly connected to the bottom of the top sealing plate 6 at the air inlet 61; a sealing sleeve 63 is connected through the air inlet 61; a connecting shaft 65 is fixedly connected to the top of the fixed support 62, and the top of the connecting shaft 65 passes through the sealing sleeve 63; a first spring 66 is sleeved at the bottom of the connecting shaft 65, and the two ends of the first spring 66 respectively abut against the inner wall of the sealing sleeve 63 and the top of the fixed support 62. To remove debris from the air inlet 61 and prevent blockage that could prevent the quick-setting agent from being discharged from the air inlet 61, a fixed support 62 is installed to support the sealing sleeve 63. The upper and lower movement of the sealing sleeve 63 is limited and reset by the connecting shaft 65 and the first spring 66. When airflow enters the air inlet pipe 51, the airflow pressure acts on the sealing sleeve 63, causing the sealing sleeve 63 to slide from inside the air inlet 61 into the flat-mouthed mixing drum 2 to open the air inlet 61. The connecting shaft 65 limits the sliding of the sealing sleeve 63. In addition, when the sealing sleeve 63 slides toward the bottom of the flat-mouthed mixing drum 2, the first spring 66 is compressed and generates elastic potential energy. When there is no air intake, the first spring 66 can push the sealing sleeve 63 to reset, thus sealing the air inlet 61.

[0039] like Figure 8 As shown, the sealing sleeve 63 has a conical structure, and the diameter of the end of the sealing sleeve 63 near the closed cover 5 is smaller than the diameter of the end of the sealing sleeve 63 near the fixed support 62; a sealing plug 64 is fixedly connected to the outer side of the end of the sealing sleeve 63 near the fixed support 62, and the sealing plug 64 slides in cooperation with the inner wall of the air inlet 61; the bottom of the end of the sealing sleeve 63 near the fixed support 62 is provided with an annular cutting edge, and the annular cutting edge slides in cooperation with the air inlet 61; when the sealing sleeve 63 slides towards the bottom of the flat-mouth stirring cylinder 2 inside the air inlet 61, the bottom of the sealing sleeve 63 disengages from the air inlet 61, and the top of the sealing sleeve 63... The diameter of the upper part is relatively smaller than that of the bottom, so it will slide downward out of the air inlet 61. At this time, there is a gap between the sealing sleeve 63 and the air inlet 61. Using this gap and airflow guidance, the quick-setting agent put into the hopper 4 can be guided into the flat-mouth mixing drum 2, so as to mix with the concrete. In addition, when the sealing sleeve 63 is subjected to air pressure, causing its bottom to detach from the air inlet 61, the annular cutting edge at the bottom of the sealing sleeve 63 will produce a scraping action, which will achieve the effect of scraping away the debris blocking the bottom of the air inlet 61, thereby avoiding the problem of the quick-setting agent not being able to be discharged from the air inlet 61 due to blockage at the air inlet 61.

[0040] like Figure 2 , Figure 5As shown, a sealing mechanism 3 is slidably fitted on the outer side of the discharge hopper 22, and the sealing mechanism 3 is used to seal unmixed concrete; the sealing mechanism 3 includes a blocking plate; curved arms 34 are fixedly connected to both sides of the blocking plate; a first sliding groove 39 is opened on both sides of the discharge hopper 22; the inner side of the bottom end of the curved arm 34 is slidably fitted with the first sliding groove 39 on the outer side of the discharge hopper 22; two symmetrically arranged crossbeams 11 are fixedly connected to the bottom of the support frame 1, and a cylinder 12 is rotatably connected to the crossbeams 11; the output end of the cylinder 12 is hinged to the bottom end of the curved arm 34. In existing technologies, during the concrete mixing and preparation process, the discharge hopper 22 needs to be sealed to prevent premature discharge of unevenly mixed concrete. The sealing mechanism 3 for the discharge hopper 22 is generally a single valve plate, which is opened and closed manually or by a cylinder 12. The valve plate can be opened and closed in two ways: vertical and horizontal. However, when concrete mixed with a quick-setting agent is discharged through the discharge hopper 22, some of the concrete will quickly solidify on the inner wall of the discharge hopper 22. This makes it difficult to open or close the horizontally opening and closing single valve plate. Furthermore, if the vertically opening and closing single valve plate is closed before the concrete has hardened, the bottom of the vertically opening and closing single valve plate will be fixed by the hardened concrete, making it difficult to open and close. Therefore, operators need to clean the discharge hopper 22 after each concrete discharge to prevent the single valve plate from becoming difficult to open and close. In this device, the cylinder 12 drives the curved arm 34 to move in the opposite direction to one side of the flat-mouth mixing drum 2. Under the action of the curved arm 34, the blockage... The plate can also move accordingly. During the sliding process of the curved arm 34, because the first sliding groove 39 is arranged obliquely, the end away from the flat-mouth mixing drum 2 is higher than the end close to the flat-mouth mixing drum 2. Therefore, when the sealing mechanism 3 slides from close to the flat-mouth mixing drum 2 to the outer end of the discharge hopper 22, a gap will be created between the bottom of the blocking plate and the inner wall of the discharge hopper 22. This gap prevents the surface of the discharge hopper 22 from having solidified concrete, thus preventing the sealing mechanism 3 from opening and closing smoothly. When the sealing mechanism 3 is closed, the blocking plate and the inner wall of the discharge hopper 22... The gap between them will gradually narrow until the blocking plate completely blocks the channel between the flat-mouth mixing drum 2 and the discharge hopper 22. The bottom of the blocking plate facing the flat-mouth mixing drum 2 is equipped with a shovel plate, which can shovel the incompletely solidified concrete into the flat-mouth mixing drum 2 when it contacts the bottom surface of the discharge hopper, so as to prevent the concrete from affecting the opening and closing of the blocking plate after it solidifies. During the opening and closing of the blocking mechanism 3, the first sliding groove 39 arranged at an angle can reduce the impact of the solidified concrete on the surface of the discharge hopper 22 when the blocking mechanism 3 is opened and closed.

[0041] like Figures 6 to 7As shown, the blocking plate includes a fixed plate 31 and a movable plate 32; the fixed plate 31 and the movable plate 32 are slidably fitted; connecting ribs 33 are fixedly connected to both sides of the fixed plate 31; the bent arm 34 is fixedly connected to the top of the connecting ribs 33; a fixing block 37 is fixedly connected to the outside of the movable plate 32, and sliding rods are fixedly connected to both ends of the fixing block 37; the sliding rods are slidably connected in the connecting ribs 33. Because the side width of the discharge hopper 22 is limited, even if the sealing mechanism 3 slides from one end of the first chute 39 to the other end, the height adjustment of the blocking plate is relatively limited. In order to increase the gap between the blocking plate and the discharge hopper 22 when the sealing mechanism 3 is open, so as to facilitate the discharge of concrete, the blocking plate is divided into a fixed plate 31 and a movable plate 32. The movable plate 32 can move up and down relative to the fixed plate 31. When the sealing mechanism 3 is open, the movable plate 32 and the fixed plate 31 remain in a contracted state, so that the gap between the blocking plate and the discharge hopper 22 increases, which facilitates the discharge of concrete. When the sealing mechanism 3 is closed, the movable plate 32 will be squeezed by the opening of the flat mixing drum 2 corresponding to the discharge hopper 22 and separate downward from the fixed plate 31, thereby sealing the opening of the flat mixing drum 2 corresponding to the discharge hopper 22 and preventing some unmixed materials from being discharged prematurely during the concrete mixing and preparation process.

[0042] like Figure 7 As shown, a spring rod 38 is fixedly connected to the top of the fixed block 37, and the top of the spring rod 38 passes through the top of the bent arm 34; the top of the movable plate 32 is provided with a bend, and the bend cooperates with the opening of the discharge hopper 22. When the movable plate 32 is squeezed and separates downward from the fixed plate 31, the spring rod 38 used to connect the movable plate 32 and the fixed plate 31 will slide and generate elastic potential energy. When the sealing mechanism 3 is in the open state, the elastic potential energy generated by the compression of the spring rod 38 will pull the movable plate 32 upward, so that the fixed plate 31 and the movable plate 32 are kept in a contracted state, thereby facilitating concrete discharge. The bend at the top of the movable plate 32 can correspond to the opening on the flat-mouth mixing drum 2, creating a sliding fit relationship. The bend can also extend the height of the movable plate 32, so that after the movable plate 32 is separated from the fixed plate 31, it can also seal the flat-mouth mixing drum 2, preventing some concrete from leaking out through the gap between the movable plate 32 and the fixed plate 31.

[0043] like Figure 7 As shown, a slider 35 is fixedly connected to the inner side of the bottom end of the curved arm 34; a second sliding groove 36 is provided at the bottom of the connecting rib; the slider 35 and the second sliding groove 36 are slidably engaged. When the curved arm 34 is driven by the cylinder 12 and slides in the second sliding groove 36 on both sides of the discharge hopper 22, since the slider 35 is engaged with the second sliding groove 36 and the slider 35 is a parallelogram, it can slide smoothly in the second sliding groove 36, so that the sealing mechanism 3 always remains in a vertical state, which facilitates the opening and closing of the sealing mechanism 3.

[0044] like Figures 1 to 2 , Figure 4 As shown, the outer side of the flat-mouthed mixing drum 2 is fixedly connected with multiple snap-fit ​​ribs 23 arranged in a circular array; a stop rod 13 is fixedly connected to the middle of the support frame 1 corresponding to the snap-fit ​​ribs 23; the stop rod 13 engages with the snap-fit ​​ribs 23. When the support frame 1 and the flat-mouthed mixing drum 2 are engaged, the snap-fit ​​ribs 23 are used to snap the flat-mouthed mixing drum 2 onto the fixed support frame 1, and the stop rod 13 is used to support the flat-mouthed mixing drum 2.

[0045] like Figure 4 , Figure 10 As shown, a lead screw 71 is fixedly connected to the top of the mixing plate 7, and the lead screw 71 is fixedly connected to the top sealing plate 6 by a nut; a transmission disc 14 is fixedly connected to the bottom of the rotating shaft 8; an output disc 15 is provided on one side of the transmission disc 14; the output disc 15 and the transmission disc 14 are driven by a belt 16. An external servo motor is fixedly connected to the output disc 15. When the output disc 15 rotates, the transmission disc 14 can be driven to rotate through the belt 16, thereby driving the rotating shaft 8 to rotate. When the rotating shaft 8 rotates, the mixing plate 7 can be driven to rotate orderly inside the flat-mouth mixing drum 2 through the top sealing plate 6, thereby achieving the mixing effect of concrete.

[0046] Example 2

[0047] like Figure 12 As shown, to prevent raw materials from escaping from the flat-mouth mixing drum 2, in comparison with Embodiment 1, another embodiment of the present invention is as follows: a connecting rod 25 is connected through the top of the feed hopper 21; a baffle 26 is rotatably connected to the connecting rod 25; a torsion spring is fixed between the side of the baffle 26 and the inside of the feed hopper 21; a baffle strip 24 is fixedly connected to one side of the inside of the feed hopper 21; to prevent easily dispersed materials such as cement poured into the flat-mouth mixing drum 2 from escaping through the feed hopper 21 during concrete preparation, a baffle 26 is provided on the feed hopper 21. Under manual force, the baffle 26 deflects downward, causing the feed hopper 21 to open. Without external force, the torsion spring drives the baffle 26 to return to its original position, and the baffle strip 24 restricts the baffle 26 from deflecting excessively. The baffle 26 and the feed hopper 21 are not sealed.

[0048] Working principle: When preparing concrete on site, in order to ensure that the accelerator is mixed evenly with the concrete, the operator controls the speed and amount of accelerator addition during the accelerator addition stage to ensure uniform mixing. However, in this method of adding accelerator, since the flat-mouth mixing drum 2 is open and the accelerator is a lightweight powder, some accelerator will be lost during the long addition process, resulting in errors in the concrete-accelerator ratio and making it difficult to control the initial setting time of the concrete. In the existing technology, there are also methods to seal the flat-mouth mixing drum 2 with a cover to prevent the loss of accelerator and concrete raw materials. However, in the existing technology, the accelerator is fed into the cover through the hole or the connected hopper 4, which will come into contact with the concrete material adhering to the bottom of the cover and cause partial solidification, thereby blocking the channel for the accelerator to be injected into the flat-mouth mixing drum 2, making it difficult to add the accelerator.

[0049] In operation, the device first feeds aggregates, cement, and other raw materials into the flat-mouth mixing drum 2 through the feed hopper 21. An external servo motor is then activated, driving the rotating shaft 8 to rotate. The rotating shaft 8 causes multiple mixing plates 7 to thoroughly mix the raw materials in the flat-mouth mixing drum 2, forming concrete. Secondly, to accelerate the initial setting speed of the concrete, a quick-setting agent in a specific ratio to the concrete volume is typically added to the on-site prepared concrete. This quick-setting agent reacts with the components in the concrete, accelerating its setting. After the concrete is thoroughly mixed, a measured amount of cement is poured into the flat-mouth mixing drum 2 through the feeding hopper 4. The accelerator, under the air intake of the air intake pipe 51, is guided by the airflow to enter the flat-mouth mixing drum 2 through the air intake port 61, thereby contacting and mixing with the concrete. Multiple air intake ports 61 are provided and arranged in a ring array. As the top sealing plate 6 rotates with the rotating shaft 8, the accelerator entering the flat-mouth mixing drum 2 through the air intake ports 61 can be more evenly distributed in the flat-mouth mixing drum 2, thereby improving the degree of mixing between the accelerator and the concrete, making the setting speed of the prepared concrete consistent, and avoiding the occurrence of local concrete setting while the rest of the concrete is still in a flowing state.

[0050] To remove debris from the air inlet 61 and prevent blockage that could prevent the quick-setting agent from being discharged from the inlet 61, a fixed support 62 is installed to support the sealing sleeve 63. A connecting shaft 65 and a first spring 66 limit and reset the vertical movement of the sealing sleeve 63. When airflow enters the air inlet pipe 51, the airflow pressure acts on the sealing sleeve 63, causing it to slide towards the bottom of the flat-mouthed mixing drum 2 within the air inlet 61. The connecting shaft 65 limits the sliding of the sealing sleeve 63. Furthermore, as the sealing sleeve 63 slides towards the bottom of the flat-mouthed mixing drum 2, the first spring 66 is compressed, generating elastic potential energy. When there is no air intake, the first spring 66 can push the sealing sleeve 63 back to its original position, thus achieving the goal of controlling the vertical movement of the air inlet 61. When the sealing sleeve 63 slides towards the bottom of the flat-mouth mixing drum 2 inside the air inlet 61, the bottom of the sealing sleeve 63 separates from the air inlet 61. Since the top diameter of the sealing sleeve 63 is relatively smaller than the bottom diameter, it will slide downward inside the air inlet 61. At this time, there is a gap between the sealing sleeve 63 and the air inlet 61. Using this gap and airflow guidance, the quick-setting agent put into the hopper 4 can be guided into the flat-mouth mixing drum 2, thereby mixing with the concrete. In addition, when the sealing sleeve 63 is subjected to air pressure, causing its bottom to separate from the air inlet 61, the annular cutting edge at the bottom of the sealing sleeve 63 will produce a scraping action, achieving the effect of scraping away the blockage debris at the bottom of the air inlet 61. This can avoid the problem of the quick-setting agent not being able to be discharged from the local air inlet 61 due to blockage at the air inlet 61.

[0051] After the accelerator is mixed with the concrete, the prepared concrete is discharged through the discharge hopper 22. In existing technologies, the discharge hopper 22 needs to be sealed during the concrete mixing process to prevent premature discharge of unevenly mixed concrete. The sealing mechanism 3 for the discharge hopper 22 is typically a single valve plate, which is opened and closed manually or by a cylinder 12. However, when the concrete mixed with the accelerator is discharged through the discharge hopper 22, some of the concrete quickly solidifies on the inner wall of the hopper 22, making it difficult to open or close the single valve plate. This necessitates the operator to manually seal the valve plate each time concrete is discharged. Afterwards, the discharge hopper 22 needs to be cleaned to prevent the single valve plate from being difficult to open and close. In this device, the output of the cylinder 12 drives the bent arm 34 to move in the opposite direction to the side of the flat-mouth mixing drum 2. Under the action of the bent arm 34, the blocking plate can also move accordingly. During the sliding process of the bent arm 34, since the first sliding groove 39 is arranged at an angle, the end away from the flat-mouth mixing drum 2 is higher than the end close to the flat-mouth mixing drum 2. Therefore, when the blocking mechanism 3 slides from the side close to the flat-mouth mixing drum 2 to the outer end of the discharge hopper 22, a gap will be generated between the bottom of the blocking plate and the inner wall of the discharge hopper 22. The generation of the gap is used to prevent the surface of the discharge hopper 22 from having solidified concrete. The sealing mechanism 3 can be opened and closed smoothly. When the sealing mechanism 3 is closed, the gap between the blocking plate and the inner wall of the discharge hopper 22 will gradually shrink until the blocking plate completely blocks the channel between the flat-mouth mixing drum 2 and the discharge hopper 22. During the opening and closing of the sealing mechanism 3, the obliquely arranged first sliding groove 39 can reduce the influence of the solidified concrete on the surface of the discharge hopper 22 when the sealing mechanism 3 is opened and closed. Moreover, since the side width of the discharge hopper 22 is limited, even if the sealing mechanism 3 slides from one end of the first sliding groove 39 to the other end, the height adjustment of the blocking plate is relatively limited. In order to increase the gap between the blocking plate and the discharge hopper 22 when the sealing mechanism 3 is opened, so as to facilitate the opening and closing of the channel between the flat-mouth mixing drum 2 and the discharge hopper 22, the sealing mechanism 3 can be opened and closed smoothly. To facilitate concrete discharge, the blocking plate is divided into a fixed plate 31 and a movable plate 32. The movable plate 32 can move up and down relative to the fixed plate 31. When the blocking mechanism 3 is open, the movable plate 32 and the fixed plate 31 remain in a contracted state, which increases the gap between the blocking plate and the discharge hopper 22, facilitating concrete discharge. When the blocking mechanism 3 is closed, the movable plate 32 is squeezed downward by the opening of the flat-mouth mixing drum 2 corresponding to the discharge hopper 22 and separates from the fixed plate 31, thereby sealing the opening of the flat-mouth mixing drum 2 corresponding to the discharge hopper 22 and preventing some unmixed materials from being discharged prematurely during the concrete mixing and preparation process.

[0052] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A concrete accelerator dosing anti-settling device, characterized by: Including support frame (1), the support frame (1) is clamped with flat mouth stirring drum (2) on cooperation, the flat mouth stirring drum (2) both sides are provided with feeding hopper (21), discharge hopper (22) respectively, the top of flat mouth stirring drum (2) is rotatably connected with top sealing plate (6), the bottom center of top sealing plate (6) is fixedly connected with rotating shaft (8), the bottom end of rotating shaft (8) penetrates flat mouth stirring drum (2), a plurality of stirring plates (7) are fixedly connected on top sealing plate (6) through nut, top sealing plate (6) top is fixedly connected with closed cover body (5) through screw, and closed cover body (5) top is fixedly connected with filling hopper (4) through flange, filling hopper (4) is used to fill accelerator, top sealing plate (6) is provided with air inlet (61) corresponding to closed cover body (5), the air inlet (61) is provided with impurity cleaning mechanism, and the impurity cleaning mechanism is used to clean the residual concrete in air inlet (61); The closed cover body (5) is a fan-shaped structure, and a plurality of cavities are arranged in the closed cover body (5), and the plurality of cavities are communicated, and the top of the closed cover body (5) is communicated with a connecting pipe, and the side of the connecting pipe is communicated with an air inlet pipe (51), and the plurality of cavities are communicated with the filling hopper (4) through the connecting pipe. The impurity cleaning mechanism comprises a fixed support (62), and the fixed support (62) is fixedly connected to the bottom of the top sealing plate (6) corresponding to the air inlet (61), the air inlet (61) is connected with a sealing sleeve (63), the bottom of the fixed support (62) is fixedly connected with a connecting shaft (65), and the top of the connecting shaft (65) penetrates the sealing sleeve (63), and the bottom of the connecting shaft (65) is sleeved with a first spring (66), and the two ends of the first spring (66) abut against the sealing sleeve (63) and the fixed support (62).

2. The concrete accelerator feeding and anti-setting device according to claim 1, characterized in that: The sealing sleeve (63) is a conical structure, and the diameter of one end of the sealing sleeve (63) close to the closed cover body (5) is smaller than the diameter of the other end of the sealing sleeve (63) close to the fixed support (62), the outer side of the one end of the sealing sleeve (63) close to the fixed support (62) is fixedly connected with a sealing plug (64), and the sealing plug (64) is slidably connected with the inner wall of the air inlet (61), and the bottom of the one end of the sealing sleeve (63) close to the fixed support (62) is provided with an annular cutting edge, and the annular cutting edge is slidably connected with the air inlet (61).

3. The concrete accelerator feeding and anti-setting device according to claim 2, characterized in that: The discharge hopper (22) is slidably connected with a blocking mechanism (3) on the outer side, and the blocking mechanism (3) is used for blocking the concrete that is not mixed uniformly, the blocking mechanism (3) comprises a blocking plate, the two sides of the blocking plate are fixedly connected with a bent arm (34), the two sides of the discharge hopper (22) are provided with a first sliding groove (39), the bottom end of the bent arm (34) is slidably connected with the first sliding groove (39) on the outer side of the discharge hopper (22), the bottom of the support frame (1) is fixedly connected with two symmetrical cross beams (11), and the cross beams (11) are rotatably connected with air cylinders (12), and the output end of the air cylinder (12) is hingedly connected with the bottom end of the outer wall.

4. The concrete accelerator feeding and anti-setting device according to claim 3, characterized in that: The baffle plate comprises a fixed plate (31) and a movable plate (32); the fixed plate (31) is in sliding fit with the movable plate (32); the fixed plate (31) is fixedly connected with connecting ribs (33) on both sides; the connecting ribs (33) are fixedly connected with bent arms (34) on top; the movable plate (32) is fixedly connected with fixed blocks (37) on the outside, and the fixed blocks (37) are fixedly connected with slide rods on both ends; the slide rods are in sliding connection in the connecting ribs (33).

5. The concrete accelerator feeding and anti-setting device according to claim 4, characterized in that: The fixed blocks (37) are fixedly connected with spring rods (38) on top, and the spring rods (38) penetrate through the top ends of the bent arms (34); the movable plate (32) is provided with a bend on top, and the bend is matched with the opening of the discharge hopper (22).

6. The concrete accelerator feeding and anti-setting device according to claim 5, characterized in that: The bottom ends of the bent arms (34) are fixedly connected with sliding blocks (35) on the inside; the connecting ribs (33) are provided with second sliding grooves (36) on the bottom; the sliding blocks (35) are in sliding fit with the second sliding grooves (36).

7. The concrete accelerator feeding and anti-setting device according to claim 6, characterized in that: The outside of the flat-mouthed stirring barrel (2) is fixedly connected with a plurality of clamping ribs (23) arranged in an annular array; the support frame (1) is fixedly connected with abutting rods (13) in the middle corresponding to the clamping ribs (23); the abutting rods (13) are in clamping fit with the clamping ribs (23).

8. The concrete accelerator feeding and anti-setting device according to claim 7, characterized in that: The top of the stirring plate (7) is fixedly connected with a lead screw (71), and the lead screw (71) is fixedly connected with a top sealing plate (6) through a nut; the bottom end of the rotating shaft (8) is fixedly connected with a transmission disc (14); one side of the transmission disc (14) is provided with an output disc (15); the output disc (15) and the transmission disc (14) are in transmission through a belt (16).

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