A chemical slurry vacuum impregnation device for recycled concrete aggregate
By combining the design of the filter cylinder and the annular guide cavity with the synergistic effect of the vacuum pump, along with the temperature control function of the heating chamber and temperature sensor, deep penetration of chemical slurry into recycled aggregates was achieved, solving the problem of insufficient slurry penetration and improving impregnation quality and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QUJING SENPENG CONCRETE CO LTD
- Filing Date
- 2025-05-23
- Publication Date
- 2026-05-29
AI Technical Summary
Traditional impregnation devices rely on natural permeation or simple pressure assistance, which makes it difficult for chemical slurry to fully penetrate the complex pore structure of recycled aggregates, especially the deep pores, resulting in poor filling effect, affecting the strength and quality of recycled concrete, and lacking effective control over slurry flowability and temperature.
The design employs a combination of a filter cylinder and an annular guide cavity, along with the synergistic effect of a stirring assembly and a vacuum pump, to achieve deep penetration of chemical slurry under vacuum negative pressure. Furthermore, precise temperature control via a heating chamber and a temperature sensor enhances the slurry's fluidity and penetration effect.
It significantly improves the filling effect of grout on the pores of aggregate surface, solves the problem of reduced concrete strength caused by insufficient grout penetration, and improves impregnation quality and efficiency.
Smart Images
Figure CN224293735U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of concrete processing technology, specifically relating to a vacuum impregnation device for chemical slurry of recycled concrete aggregate. Background Technology
[0002] Recycled aggregates, derived from the crushing and processing of waste concrete, have a complex and highly porous surface structure. This makes them prone to absorbing moisture during use, thus affecting the workability of fresh concrete and the mechanical properties after hardening. To improve the performance of recycled aggregates, they are typically impregnated with chemical slurry to fill their surface pores and increase their density and strength.
[0003] However, traditional impregnation devices mostly rely on natural penetration or simple pressure-assisted methods. Due to the complex pores on the surface of recycled aggregates, chemical slurry is difficult to fully penetrate into the complex pore structure of recycled aggregates, especially the filling effect of deep pores is poor, which affects the overall strength and quality of recycled concrete. In addition, traditional impregnation devices usually lack effective control over the fluidity and temperature of the slurry, which further limits the improvement of impregnation efficiency and quality. Utility Model Content
[0004] To overcome the limitations of traditional impregnation devices in the background art, which mostly rely on natural penetration or simple pressure-assisted methods and lack effective control over slurry flowability and temperature, resulting in the chemical slurry failing to fully penetrate the complex pore structure of recycled aggregates, especially with poor filling effect in deep pores, thus affecting the overall strength and quality of recycled concrete, this utility model provides a vacuum impregnation device for recycled concrete aggregates using chemical slurry. Through the combined design of a filter cylinder and an annular guide cavity, the chemical slurry is uniformly introduced into the interior through the pores of the filter cylinder to contact the recycled aggregates. Combined with the synergistic effect of the mixing component and vacuum pump, deep penetration of the chemical slurry under vacuum negative pressure is achieved, significantly improving the filling effect of the slurry on the pores of the aggregate surface. This effectively solves the problem of reduced concrete strength caused by insufficient slurry penetration in traditional devices. At the same time, the precise temperature control function of the heating chamber and temperature sensor further increases the flowability of the slurry, thereby improving the impregnation quality and efficiency.
[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: A vacuum impregnation device for recycled concrete aggregate chemical slurry mainly includes a frame, an impregnation tank, a mixing assembly, a vacuum pump, a filter cylinder, a liquid supply pump, a drain pipe, an annular partition, electric heating tubes, a temperature sensor, and a sealing shell. The frame is equipped with a double-layered impregnation tank. A heating chamber is provided between the inner and outer walls of the impregnation tank. A temperature sensor and multiple electric heating tubes are installed inside the heating chamber, arranged in a ring array along the inner wall of the heating chamber. The temperature sensor is electrically connected to a controller installed on the outer wall of the impregnation tank. A filter cylinder is installed inside the impregnation tank. A cavity interlayer is provided between the outer wall of the filter cylinder and the inner wall of the impregnation tank. An annular partition connected to the inner wall of the impregnation tank and the outer wall of the filter cylinder is installed in the middle of the cavity interlayer, dividing the cavity interlayer into an annular guide cavity and a collection cavity. The filter cylinder has evenly distributed pores along its circumference that communicate with the flow guiding cavity. The bottom of the filter cylinder has an arc-shaped structure with multiple filter holes evenly distributed on the arc-shaped bottom. A sealing shell is installed on the top of the impregnation tank, and a stirring assembly is installed inside the filter cylinder. A vacuum pump is installed on one side of the impregnation tank, with its inlet connected to the inside of the impregnation tank via a pipe and its outlet connected to the external environment. A liquid supply pump is installed on the other side of the impregnation tank, with its inlet connected to the inside of an external storage tank via a pipe and its outlet connected to the annular flow guiding cavity inside the impregnation tank via a pipe. A drain pipe connected to the collection cavity is provided at the bottom of the impregnation tank, and a one-way valve is installed inside the drain pipe. A feed inlet is provided on the top surface of the filter cylinder, with a sealing cap threaded onto the feed inlet. A discharge pipe connected to the bottom of the filter cylinder is installed at the bottom of the impregnation tank, and a switch valve is installed on the discharge pipe.
[0006] The stirring assembly includes a drive motor, a main stirring rod, a secondary stirring rod, stirring blades, and a scraper. The main stirring rod is mounted on the top surface of the sealing cover via a bearing seat, and its bottom end penetrates the sealing cover and extends to the bottom of the filter screen cylinder. The drive motor is fixed to the top surface of the impregnation tank, and the output shaft of the drive motor is fixedly connected to the main stirring rod. Several stirring blades are evenly fixed on the main stirring rod along the circumferential direction, and the stirring blades are arranged in an inclined manner. Several secondary stirring rods are evenly arranged on the main stirring rod along the circumferential direction. The scraper is vertically installed at the end of the secondary stirring rod and located in the annular guide cavity. The scraper is in contact with the inner wall of the impregnation tank and the outer wall of the filter screen cylinder.
[0007] The outer wall of the impregnation tank is provided with an insulation layer to reduce heat loss and improve the temperature control efficiency of the heating chamber.
[0008] The top of the impregnation tank is fitted with a sealing ring, and the end of the sealing cap is connected to the top of the impregnation tank via a flange to ensure the sealing performance of the device.
[0009] The top of the sealing shell is equipped with a glass observation window to facilitate real-time monitoring of the slurry distribution during the impregnation process.
[0010] The beneficial effects of this utility model are:
[0011] This invention utilizes a combination design of a filter cylinder and an annular guide cavity to allow the chemical slurry to uniformly enter the interior through the pores of the filter cylinder and come into contact with the recycled aggregate. Combined with the synergistic effect of the mixing component and the vacuum pump, it achieves deep penetration of the chemical slurry under vacuum negative pressure, significantly improving the filling effect of the slurry on the surface pores of the aggregate. This effectively solves the problem of reduced concrete strength caused by insufficient slurry penetration in traditional devices. At the same time, the precise temperature control function of the heating chamber and temperature sensor further increases the fluidity of the slurry, thereby improving the impregnation quality and efficiency. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0013] Figure 2 This is a cross-sectional view of the internal structure of this utility model.
[0014] Figure 3 This is a three-dimensional schematic diagram of the stirring component of this utility model.
[0015] The attached diagram is labeled as follows: 1. Frame; 2. Impregnation tank; 3. Filter screen cylinder; 4. Stirring assembly; 5. Vacuum pump; 6. Liquid supply pump; 7. Drain pipe; 8. Annular baffle; 9. Heating chamber; 10. Heating element; 11. Temperature sensor; 12. Sealing shell; 13. Drive motor; 14. Main stirring rod; 15. Secondary stirring rod; 16. Stirring blade; 17. Scraper; 18. Feed inlet; 19. Sealing cover; 20. Discharge pipe; 21. Glass observation window. Detailed Implementation
[0016] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so as to facilitate the understanding of those skilled in the art.
[0017] This utility model discloses a vacuum impregnation device for chemical slurry of recycled concrete aggregate. The device mainly includes a frame 1, an impregnation tank 2, a filter cylinder 3, a stirring assembly 4, a vacuum pump 5, a liquid supply pump 6, a drain pipe 7, an annular partition 8, an electric heating element 10, a temperature sensor 11, and a sealing shell 12. Figure 1The diagram shows the overall structure of the device. The impregnation tank 2 is mounted on the frame 1 and has a double-layer structure. A heating chamber 9 is provided between the inner and outer walls. Temperature sensors 11 and multiple heating tubes 10 are installed inside the heating chamber 9. The heating tubes 10 are arranged in a ring array along the inner wall of the heating chamber 9. The temperature sensors 11 are electrically connected to a controller installed on the outer wall of the impregnation tank 2 to achieve precise control of the temperature inside the heating chamber 9. The outer wall of the impregnation tank 2 is also provided with a heat insulation layer, which can effectively reduce heat loss and improve temperature control efficiency. A sealing shell 12 is installed on the top of the impregnation tank 2. A glass observation window 21 is provided on the top of the sealing shell 12 to facilitate the operator to monitor the distribution of slurry during the impregnation process in real time.
[0018] Further integration Figure 2 As shown in the sectional view of the internal structure, a filter cylinder 3 is installed inside the impregnation tank 2. A cavity interlayer is formed between the outer wall of the filter cylinder 3 and the inner wall of the impregnation tank 2. An annular baffle 8 is installed in the middle of the cavity interlayer, which divides the cavity interlayer into an annular guide cavity and a liquid collection cavity. The filter cylinder 3 has pores that communicate with the annular guide cavity evenly distributed along the circumference. Its bottom is designed as an arc-shaped structure, and multiple filter holes are evenly distributed at the bottom of the arc, so that the chemical slurry is evenly distributed to the filter cylinder through the pores on the surface of the filter cylinder. Inside the filter cylinder 3, the slurry is collected and returned through the filter holes. The bottom of the impregnation tank 2 is also equipped with a drain pipe 7 that is connected to the collection chamber. The drain pipe 7 is equipped with a one-way valve 22 to prevent the slurry from flowing back. In addition, the top surface of the filter cylinder 3 is provided with a feed port 18, and a sealing cap 19 is threaded onto the feed port 18 to ensure good sealing performance during operation. The bottom of the impregnation tank 2 is equipped with a discharge pipe 20 that is connected to the bottom of the filter cylinder 3. A switch valve 21 is installed on the discharge pipe 20 to control the discharge of recycled aggregate.
[0019] Figure 3 The structure of the stirring assembly 4 is shown. The stirring assembly 4 includes a drive motor 13, a main stirring rod 14, a secondary stirring rod 15, stirring blades 16, and a scraper 17. The main stirring rod 14 is mounted on the center of the top surface of the sealing cover 19 via a bearing seat, and its bottom end passes through the sealing cover 19 and extends to the bottom of the filter cylinder 3. The drive motor 13 is fixed to the center of the top surface of the impregnation tank 2, and its output shaft is fixedly connected to the main stirring rod 14 to drive the main stirring rod 14 to rotate. Several stirring blades are evenly fixed on the main stirring rod 14 along the circumferential direction. 16. These stirring blades 16 are arranged at an angle, which can fully stir the aggregate and slurry in the filter cylinder 3 during rotation, ensuring that the slurry evenly covers the surface of the aggregate; multiple auxiliary stirring rods 15 are evenly arranged along the circumference on the main stirring rod 14, and a scraper 17 is vertically installed at the end of each auxiliary stirring rod 15. The scraper 17 is located in the annular guide cavity and contacts the inner wall of the impregnation tank 2 and the outer wall of the filter cylinder 3, which can effectively remove the slurry residue attached to the wall surface, avoiding clogging of the pores or affecting the flow of the slurry.
[0020] Vacuum pump 5 is installed on one side of impregnation tank 2. Its air inlet is connected to the inside of impregnation tank 2 through a pipe, while its air outlet is connected to the external environment. During the impregnation process, vacuum pump 5 creates a negative pressure environment by extracting air from the inside of impregnation tank 2, thereby promoting the deep penetration of chemical slurry into the pores on the surface of aggregate. Liquid supply pump 6 is installed on frame 1. Its liquid inlet is connected to the inside of external storage tank through a pipe, while its liquid outlet is connected to the annular guide cavity inside impregnation tank 2 through a pipe. It is used to transport chemical slurry to the annular guide cavity. Through the coordinated work of liquid supply pump 6 and vacuum pump 5, it is ensured that the slurry efficiently fills the pores on the surface of aggregate under negative pressure.
[0021] As can be seen from the above embodiments, this utility model, through the combined design of the filter cylinder 3 and the annular guide cavity, allows the chemical slurry to uniformly enter the interior through the pores of the filter cylinder 3 and contact the recycled aggregate. Combined with the synergistic effect of the mixing component 4 and the vacuum pump 5, it achieves deep penetration of the chemical slurry under vacuum negative pressure, significantly improving the filling effect of the slurry on the surface pores of the aggregate. This effectively solves the problem of reduced concrete strength caused by insufficient slurry penetration in traditional devices. At the same time, the precise temperature control function of the heating chamber and the temperature sensor 11 further increases the fluidity of the slurry, thereby improving the impregnation quality and efficiency.
[0022] Work process:
[0023] First, the recycled aggregate to be processed is loaded into the filter cylinder 3 through the feed inlet 18. Then, the sealing cap 19 is tightened to ensure the airtightness of the device. The electric heating tube 10 in the heating chamber 9 is started. The temperature sensor 11 monitors the internal temperature of the heating chamber 9 in real time and feeds the signal back to the controller. The controller automatically adjusts the working state according to the feedback signal to maintain the slurry with good fluidity within a suitable temperature range. Next, the liquid supply pump 6 is started to transport the chemical slurry in the storage tank to the annular guide cavity through the pipeline. The slurry enters the filter cylinder 3 through the pores on the filter cylinder 3 and comes into contact with the aggregate. At this time, the vacuum pump 5 is started to create a negative pressure environment inside the impregnation tank 2, which helps the slurry overcome the complex structure of the pores on the surface of the aggregate and achieve deep penetration. At the same time, the drive motor 13 is started to drive the stirring assembly 4 to operate. The stirring blades 16 on the main stirring rod 14 stir the aggregate and slurry to ensure that the slurry fully covers the surface of the aggregate. The scraper 17 removes the slurry residue on the inner wall of the annular guide cavity and the outer wall of the filter cylinder 3 to avoid clogging the pores and improve the fluidity of the slurry. Unabsorbed chemical slurry flows into the collection chamber through the filter holes at the bottom of the filter cylinder 3 and is collected in the machine. After a certain period of impregnation, the vacuum pump 5 and the liquid supply pump 6 are turned off, and the one-way valve 22 on the drain pipe 7 is opened to discharge the slurry in the collection chamber and recycle it. Finally, the switch valve 21 on the discharge pipe 20 is opened to discharge the processed recycled aggregate from the bottom of the filter cylinder 3.
[0024] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.
Claims
1. A vacuum impregnation device for chemical slurry of recycled concrete aggregate, characterized in that: The aforementioned vacuum impregnation device for recycled concrete aggregate chemical slurry includes a frame (1), an impregnation tank (2), a filter cylinder (3), a stirring assembly (4), a vacuum pump (5), a liquid supply pump (6), a drain pipe (7), an annular partition (8), an electric heating tube (10), a temperature sensor (11), and a sealing shell (12). The impregnation tank (2) is mounted on the frame (1). The impregnation tank (2) has a double-layer structure design, with a heating chamber (9) between the inner and outer wall surfaces. The heating chamber (9) is equipped with a temperature sensor (11) and multiple heating tubes (10). The heating tubes (10) are arranged in a ring array along the inner wall of the heating chamber (9). The temperature sensor (11) is electrically connected to a controller installed on the outer wall of the impregnation tank (2). A filter cylinder (3) is installed inside the impregnation tank (2). A cavity interlayer is formed between the outer wall of the filter cylinder (3) and the inner wall of the impregnation tank (2). An annular partition (8) is installed in the middle of the cavity interlayer. The annular partition (8) divides the cavity interlayer into an annular flow guiding cavity and a liquid collecting cavity. The filter cylinder (3) has pores that are evenly distributed along the circumference and communicate with the annular guide cavity. The bottom of the filter cylinder (3) is an arc-shaped structure with multiple filter holes evenly distributed at the bottom. The top of the impregnation tank (2) is equipped with a sealing shell (12). The filter cylinder (3) is equipped with a stirring assembly (4). The vacuum pump (5) is installed on one side of the impregnation tank (2) and its air inlet is connected to the inside of the impregnation tank (2) through a pipe. Its air outlet is connected to the external environment. The liquid supply pump (6) is installed on the other side of the impregnation tank (2) and its liquid inlet is connected to the outside of the tank. The liquid outlet is connected to the internal annular guide cavity inside the impregnation tank (2) through a pipe. The bottom of the impregnation tank (2) is provided with a drain pipe (7) connected to the liquid collection cavity. A one-way valve (22) is provided inside the drain pipe (7). The top surface of the filter cylinder (3) is provided with a feed inlet (18). A sealing cap (19) is threaded onto the feed inlet (18). The bottom of the impregnation tank (2) is provided with a discharge pipe (20) connected to the bottom of the filter cylinder (3). A switch valve is installed on the discharge pipe (20).
2. The vacuum impregnation device for recycled concrete aggregate chemical slurry as described in claim 1, characterized in that: The stirring assembly (4) includes a drive motor (13), a main stirring rod (14), a secondary stirring rod (15), stirring blades (16), and a scraper (17). The main stirring rod (14) is installed in the middle of the top surface of the sealing cover (19) through a bearing seat. Its bottom end passes through the sealing cover (19) and extends to the bottom of the filter cylinder (3). The drive motor (13) is fixed in the middle of the top surface of the impregnation tank (2), and its output shaft is fixedly connected to the main stirring rod (14). Several stirring blades (16) are evenly fixed on the main stirring rod (14) along the circumferential direction. The stirring blades (16) are arranged in an inclined manner. Several secondary stirring rods (15) are evenly arranged on the main stirring rod (14) along the circumferential direction. The scraper (17) is vertically installed at the end of the secondary stirring rod (15) and located in the annular guide cavity. The scraper (17) is in contact with the inner wall of the impregnation tank (2) and the outer wall of the filter cylinder (3).
3. A vacuum impregnation device for chemical slurry of recycled concrete aggregate as described in claim 1 or 2, characterized in that: The outer wall of the impregnation tank (2) is provided with a heat insulation layer.
4. The vacuum impregnation device for chemical slurry of recycled concrete aggregate as described in claim 3, characterized in that: The top of the impregnation tank (2) is fitted with a sealing ring, and the end of the sealing cover (19) is connected to the top of the impregnation tank (2) through a flange.
5. A vacuum impregnation device for chemical slurry of recycled concrete aggregate as described in claim 1 or 2, characterized in that: The sealing shell (12) is provided with a glass observation window (21) on the top.