Cement paste stirrer

Abstract

The utility model discloses a cement paste stirrer, which belongs to the technical field of stirring equipment and comprises a rack, a water storage bin and a cement storage bin are arranged at the top of the rack, a water metering scale is connected below the water storage bin and connected with a stirring barrel through a first feeding pipeline, and the cement storage bin is connected with the stirring barrel through a second feeding pipeline. A cement metering scale is connected to the lower portion of the cement storage bin and connected with the stirring barrel through a second feeding pipeline, a shock absorber is arranged on the second feeding pipeline, and a double-valve mechanism is arranged in the cement metering scale. The cement paste stirrer solves the technical problems that an existing cement paste stirrer is likely to have the material residue phenomenon, experimental errors are caused by vibration, and then the material weighing precision is affected.

Description

Technical Field

[0001] This utility model belongs to the technical field of mixing equipment, specifically relating to a cement paste mixer. Background Technology

[0002] Cement paste is an important component of cement-based materials, and its performance directly affects the quality of cement-based materials such as concrete. In traditional cement paste mixers, the weighing device can lead to material residue issues. For example, cement powder, due to its low density, easily suspends in the air, and some unsettled material cannot be detected by the sensor. Wet or damp material can also adhere to the inner wall of the weighing hopper or pipes, forming residues. Furthermore, even after the discharge gate is closed, adhering material may not be completely discharged. All these situations contribute to material residue problems. In addition, vibrations during the feeding process can also introduce experimental errors.

[0003] Chinese patent CN114932632A discloses a mortar mixing production line. By installing a buffer valve with rotating blades between the feeding hopper and the powder weighing hopper, and by placing a weighing sensor on the weighing hook, the accuracy of weighing mortar materials can be improved, weighing errors reduced, and product quality improved. However, during the feeding process, material inevitably remains in the pipes or valves, still affecting the weighing accuracy. In addition, the vibration caused by the instantaneous impact force when the material falls vertically into the weighing hopper during feeding can cause experimental errors, further affecting the weighing accuracy. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide a cement paste mixer to solve the technical problems of material residue and experimental errors caused by vibration in existing cement paste mixers, which in turn affect the accuracy of material weighing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model provides a cement paste mixer, including a frame, a water storage silo and a cement storage silo at the top of the frame, a water metering scale connected below the water storage silo, the water metering scale being connected to the mixing tank through a first feeding pipe, a cement metering scale connected below the cement storage silo, the cement metering scale being connected to the mixing tank through a second feeding pipe, a shock absorber being installed on the second feeding pipe, and a double valve mechanism being installed inside the cement metering scale.

[0007] In the above technical solution, the frame is used to support and fix other components; the mixing tank is used to hold and mix cement paste, with a feed inlet at the top and a discharge outlet at the bottom. The mixing tank can be cylindrical to facilitate mixing and cleaning; the cement storage silo and water storage silo are used to store cement and water, and the cement metering scale and water metering scale are used to control the amount of cement and water added. Then, the cement and water are transported to the mixing tank through the first feeding pipe and the second feeding pipe.

[0008] More preferably, the shock absorber is a rubber damper or a spring suspension.

[0009] Preferably, the dual-valve mechanism includes a main valve connected to the discharge port of the cement weighing scale, and an auxiliary valve connected to one side of the discharge pipe of the main valve, wherein the auxiliary valve is provided with a built-in paddle.

[0010] Preferably, the built-in paddle is a flexible scraper.

[0011] More preferably, the built-in paddle is made of silicone.

[0012] The design principle of the dual-valve mechanism in the above technical solution is as follows:

[0013] Two valves (main valve + auxiliary valve) are added to the discharge port of the cement weighing scale. The main valve is used for rapid material discharge, and the auxiliary valve uses a flexible sealing plate to remove residue.

[0014] 1) Main valve: When opened, it allows for the rapid release of 90% of the material;

[0015] 2) Auxiliary valve: After the residual material is removed, the pressure on the flexible scraper (such as silicone material) gradually decreases and the bending angle gradually decreases, so the residual material adhering to the edge of the auxiliary valve is further scraped off.

[0016] The above improvements can reduce the residual amount to below 0.5%, which is especially suitable for the accurate metering of cement powder.

[0017] Dynamic damping structure: Shock absorbers (such as rubber dampers or spring suspensions) are embedded in the support frame of the cement weighing scale, and are combined with weight sensors and vibration isolation layers.

[0018] 1) External vibrations (such as mixer operation, equipment movement) are absorbed by the shock absorber to avoid affecting the sensor readings.

[0019] 2) A flexible connection is used between the weight sensor and the cement weighing scale body to further isolate high-frequency vibration.

[0020] The above improvements can reduce the weighing error from ±1% to ±0.3%, making it suitable for high-precision mixing scenarios.

[0021] Preferably, a vacuum pump is connected above the auxiliary valve.

[0022] Preferably, a pipe is provided on one side of the main valve.

[0023] Preferably, the shock absorber is provided on the second feeding pipe.

[0024] Preferably, a weight sensor is connected to the shock absorber.

[0025] Preferably, the shock absorber has several layers of shock-absorbing isolation layers arranged circumferentially on its outer periphery.

[0026] Preferably, a vacuum auxiliary system is connected below the cement weighing scale, a vacuum pump is connected to the top of the vacuum auxiliary system, the vacuum pump is connected to the mixing tank through a vacuum pipe, and a vacuum gauge is installed on the vacuum auxiliary system.

[0027] In the above technical solution, a vacuum pump is connected to the mixing tank via a vacuum pipeline to extract air from the mixing tank, thereby reducing the generation of air bubbles and improving the density of the cement paste. A vacuum gauge is used to monitor the vacuum level inside the mixing tank to ensure the effective operation of the vacuum-assisted system.

[0028] Preferably, the mixing tank is provided with a mixing shaft, the mixing shaft is connected to the first feeding pipe, and the mixing shaft is provided with spiral mixing blades.

[0029] In the above technical solution, the stirring shaft is driven by a motor, which rotates the stirring blades to stir the cement slurry in the mixing tank. The stirring blades are designed in a spiral shape to improve stirring efficiency and ensure the uniformity of the cement slurry.

[0030] Preferably, a controller is provided between the water metering scale and the first feeding pipe, and the controller is equipped with a display screen.

[0031] In the above technical solution, the controller is used to control the operation of the cement storage silo, water storage silo, cement metering scale, water metering scale, first feeding pipe, gravity feeding device, vacuum pump, vacuum gauge, mixing shaft, and mixing blades. The controller can be controlled by a PLC or a touch screen to achieve automated operation.

[0032] Preferably, the controller is a PR10 simple PLC with Chinese interface: 8 inputs and 8 outputs [Power supply: AC100~240V].

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] This utility model provides a cement paste mixer. By setting a double valve mechanism on the mixer frame, the cement residue adhering to the inner wall of the valve or pipe is effectively reduced, making the measurement of cement powder more accurate. At the same time, the shock absorber absorbs the vibration energy of the cement weighing scale or feeding pipe, avoiding fluctuations in weighing data due to equipment vibration, and improving the accuracy of cement / water ratio.

[0035] Furthermore, the built-in paddle, being made of a flexible material, possesses elastic properties. During the cement discharge process through the main valve, cement continuously accumulates at the bottom of the main valve's discharge pipe. Over time, this accumulated cement continuously compresses the built-in paddle, causing it to bend at a certain angle. This invention, through the cooperation of an auxiliary valve and a vacuum pump, provides sufficient power to the built-in paddle (i.e., introducing a certain amount of air force through the control of the auxiliary valve). The air force then pushes the accumulated cement towards the mixing tank, thereby reducing cement adhesion and residue on the valve or pipe's inner wall. In addition, the opening of the main valve allows for the rapid release of 90% of the material; the combined effect of the main and auxiliary valves significantly reduces residual material.

[0036] Furthermore, choosing a flexible scraper will make it more elastic, which is beneficial for pushing the piled cement.

[0037] Furthermore, a pipeline is opened on one side of the main valve to reserve a certain space for gas, so as to balance the gas pressure changes when the main valve is opened and closed, and prevent cylinder explosion due to sudden pressure changes.

[0038] Furthermore, shock absorbers are installed on the second feeding pipe to block the mechanical impact transmitted to the cement weighing scale due to pipe vibration during cement transportation.

[0039] Furthermore, by using a weight sensor to monitor the working status of the shock absorber in real time, the instantaneous weight deviation caused by vibration is automatically corrected, thereby improving the stability of the weighing data.

[0040] Furthermore, by setting up shock-absorbing isolation layers to gradually attenuate external vibration energy, high-frequency vibrations can be prevented from penetrating the shock absorber and affecting weighing accuracy.

[0041] Furthermore, a vacuum pump is connected to the mixing tank via a vacuum pipeline to extract air from the tank, reducing bubble formation and improving the density of the cement paste. A vacuum gauge is used to monitor the vacuum level inside the mixing tank, ensuring the effective operation of the vacuum-assisted system.

[0042] Furthermore, the integrated design of the mixing shaft and the feeding pipe allows water / cement to be sheared and mixed by the spiral blades as soon as it enters the mixing tank, shortening the overall mixing time and improving the uniformity of the slurry.

[0043] Furthermore, the controller is used to control the opening and closing or feeding values ​​of various mechanisms of the mixer (such as cement storage silos, water storage silos, cement weighing scales, water weighing scales, first feeding pipes, gravity feeding devices, vacuum pumps, vacuum gauges, mixing shafts, and mixing blades); the display screen provides real-time data feedback, which is convenient for operators to monitor and adjust parameters. Attached Figure Description

[0044] Figure 1 This is a structural diagram of the cement paste mixer of this utility model;

[0045] Figure 2 This is a diagram showing the internal structure of the cement weighing scale of this utility model;

[0046] Wherein: 1-Mixing tank; 2-Water storage silo; 3-Cement storage silo; 4-Water metering scale; 5-Cement metering scale; 6-First feeding pipe; 7-Mixing tank; 8-Main valve; 9-Auxiliary valve; 10-Built-in paddle; 11-Vacuum pump; 12-Shock absorber; 13-Weight sensor; 14-Shockproof isolation layer; 15-Discharge port; 16-Vacuum auxiliary system; 17-Vacuum pump; 18-Vacuum gauge; 19-Vacuum pipe; 20-Mixing shaft; 21-Controller; 22-Display screen; 23-Second feeding pipe. Detailed Implementation

[0047] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0048] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0049] The present invention will now be described in further detail with reference to the accompanying drawings:

[0050] like Figures 1 to 2 As shown, this utility model provides a cement paste mixer, including a frame 1. A water storage bin 2 and a cement storage bin 3 are provided on the top of the frame 1. A water metering scale 4 is connected below the water storage bin 2. The water metering scale 4 is connected to the mixing tank 7 through a first feeding pipe 6. A cement metering scale 5 is connected below the cement storage bin 3. The cement metering scale 5 is connected to the mixing tank 7 through a second feeding pipe 23. A double valve mechanism and a shock absorber 12 are provided inside the cement metering scale 5.

[0051] Furthermore, the shock absorber 12 is a rubber damper or a spring suspension.

[0052] Preferably, the dual-valve mechanism includes a main valve 8, which is connected to the discharge port 15 of the cement weighing scale 5. An auxiliary valve 9 is connected to one side of the discharge pipe of the main valve 8. An internal paddle 10 is provided inside the auxiliary valve 9, and a vacuum pump 11 is connected above the auxiliary valve 9.

[0053] Preferably, the built-in scraper 10 is a flexible scraper.

[0054] More preferably, the built-in paddle 10 is made of silicone.

[0055] Preferably, a pipe is provided on one side of the main valve 8.

[0056] Preferably, the shock absorber 12 is provided on the second feeding pipe 23.

[0057] Preferably, a weight sensor 13 is connected to the shock absorber 12.

[0058] Preferably, the shock absorber 12 has several layers of shock-absorbing isolation layers 13 arranged circumferentially on its outer periphery.

[0059] Preferably, a vacuum auxiliary system 16 is connected below the cement weighing scale 5, a vacuum pump 17 is connected to the top of the vacuum auxiliary system 16, the vacuum pump 17 is connected to the mixing tank 7 through a vacuum pipe 19, and a vacuum gauge 18 is installed on the vacuum auxiliary system 16.

[0060] Preferably, the mixing tank 7 is provided with a mixing shaft 20, which is connected to the first feeding pipe 6, and the mixing shaft 20 is provided with spiral mixing blades.

[0061] Preferably, a controller 21 is provided between the water metering scale 4 and the first feeding pipe 6, and the controller 21 is provided with a display screen 22.

[0062] Preferably, the controller is a PR10 simple PLC with Chinese interface: 8 inputs and 8 outputs [Power supply: AC100~240V].

[0063] The working process of this cement paste mixer is as follows:

[0064] 1) Feeding: Cement and water are added to the cement storage silo 3 and water storage silo 2 respectively, and the feeding amount of cement and water is set by the controller 21; 2) Metering: After the equipment is started, the cement metering scale 5 and water metering scale 4 measure the cement and water respectively; 3) Conveying: Cement and water are conveyed to the mixing tank 7 through the first feeding pipe 6 and the second feeding pipe 23; 4) Vacuuming: The vacuum pump 17 starts working and extracts the air in the mixing tank 7 through the vacuum pipe 19. The vacuum gauge 18 monitors the vacuum degree in the mixing tank 7; 5) Mixing: The mixing shaft 20 is driven by a motor, which drives the mixing blades to rotate and mix the cement paste; 6) Discharging: After mixing is completed, the discharge port is opened to discharge the cement paste.

[0065] The above content is only for illustrating the technical concept of this utility model and should not be construed as limiting the scope of protection of this utility model. Any modifications made to the technical solution based on the technical concept proposed in this utility model shall fall within the scope of protection of the claims of this utility model.

Claims

1. A cement paste mixer characterized by, Including frame (1), top of frame (1) is provided with water storage bin (2) and cement storage bin (3), water metering scale (4) is connected below water storage bin (2), water metering scale (4) is connected with stirring barrel (7) through first feeding pipe (6), cement metering scale (5) is connected below cement storage bin (3), cement metering scale (5) is connected with stirring barrel (7) through second feeding pipe (23), shock absorber (12) is arranged on second feeding pipe (23), double valve mechanism is arranged in cement metering scale (5).

2. A cement paste mixer according to claim 1, wherein The double valve mechanism includes a main valve (8) connected to the discharge port (15) of the cement metering scale (5), an auxiliary valve (9) connected to one side of the discharge pipe of the main valve (8), and an internal paddle (10) arranged in the auxiliary valve (9).

3. A cement paste mixer according to claim 2, wherein The auxiliary valve (9) is connected to a vacuum extractor (11) above.

4. A cement paste mixer according to claim 2, wherein The internal paddle (10) is a flexible scraper.

5. A cement paste mixer according to claim 2, wherein A pipe is formed on one side of the main valve (8).

6. A cement paste mixer according to claim 1, wherein A weight sensor (14) is connected to the shock absorber (12).

7. A cement paste mixer according to claim 1, wherein Several layers of shock isolation layers (13) are arranged on the outer circumferential surface of the shock absorber (12).

8. A cement paste mixer according to claim 1, wherein A vacuum auxiliary system (16) is connected below the cement metering scale (5), a vacuum pump (17) is connected to the top of the vacuum auxiliary system (16), the vacuum pump (17) is connected to the stirring barrel (7) through a vacuum pipe (19), and a vacuum gauge (18) is arranged on the vacuum auxiliary system (16).

9. A cement paste mixer according to claim 1, wherein A stirring shaft (20) is arranged in the stirring barrel (7), the stirring shaft (20) is connected to the first feeding pipe (6), and helical stirring blades are arranged on the stirring shaft (20).

10. The cement paste mixer of claim 1, wherein, A controller (21) is arranged between the water metering scale (4) and the first feeding pipe (6), and a display screen (22) is arranged on the controller (21).

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