Large cement foaming machine

Abstract

The utility model discloses a large-scale cement foaming machine, which relates to the technical field of cement foaming machines, and comprises a mixing cylinder, a foaming agent feeding mechanism and a cement feeding mechanism, a secondary foaming mechanism is arranged below the mixing cylinder, and a first stirring chamber and a second stirring chamber communicated with the first stirring chamber are arranged in the mixing cylinder. The first stirring chamber is internally provided with a first stirring shaft which is rotationally connected, the upper end of the material mixing barrel is provided with a second motor which drives the first stirring shaft, the secondary foaming mechanism comprises an air compressor, an air supply pipe, a second stirring shaft and a third motor, and the second stirring shaft is installed in the second stirring chamber and rotationally connected with the material mixing barrel. And a third motor is mounted on the mixing barrel and drives the second stirring shaft through a chain wheel and a chain. The foaming machine has the advantages of a double-layer stirring structure and a secondary foaming mechanism, and solves the problems that a traditional foaming machine is low in foam ratio, uneven in bubble distribution and easy to block.

Description

Technical Field

[0001] This utility model relates to the field of cement foaming machine technology, specifically a large-scale cement foaming machine. Background Technology

[0002] Cement foaming technology is a commonly used process in modern construction. It reduces the density of materials by introducing air bubbles into cement slurry, thereby achieving effects such as thermal insulation and sound insulation. However, traditional cement foaming equipment often suffers from problems such as low foam content and uneven bubble distribution, which directly affect the performance and quality of the final product. To address these issues, new foaming machines are constantly being introduced to the market, but most designs still remain at the single-stage mixing and foaming stage, failing to effectively solve the problem of uneven bubble distribution. Furthermore, the stability and durability of the equipment also face challenges.

[0003] Specifically, existing cement foaming machines typically use a single mixing chamber to mix cement and foaming agent. This not only limits foaming efficiency but also makes it difficult to ensure the uniform distribution of air bubbles in the cement matrix. Furthermore, traditional foaming machines lack an effective secondary foaming mechanism, resulting in low porosity and insufficient structural strength in the foamed cement. Moreover, in actual operation, simple aeration-type secondary foaming, lacking a mechanism specifically designed to prevent cement slurry from flowing back into the foaming device, is prone to equipment blockage after prolonged use, increasing maintenance costs and downtime. Therefore, a large-scale cement foaming machine is needed to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a large-scale cement foaming machine with the advantages of a double-layer mixing structure and a secondary foaming mechanism, which solves the problems of low foam content, uneven bubble distribution, and easy clogging of traditional foaming machines.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a large cement foaming machine, comprising a mixing cylinder, a foaming agent feeding mechanism, and a cement feeding mechanism, wherein a secondary foaming mechanism is provided below the mixing cylinder;

[0006] The mixing cylinder is provided with a first stirring chamber and a second stirring chamber communicating with it. A first stirring shaft is rotatably connected in the first stirring chamber. A second motor is provided at the upper end of the mixing cylinder to drive the first stirring shaft. The secondary foaming mechanism includes an air compressor, an air supply pipe, a second stirring shaft and a third motor. The second stirring shaft is installed in the second stirring chamber and rotatably connected to the mixing cylinder. The third motor is installed on the mixing cylinder and drives the second stirring shaft through a sprocket and a chain. The second stirring shaft includes a central pipe and branch pipes communicating with each other. The air compressor is communicating with the central pipe through the air supply pipe. Air outlets are evenly arranged on the branch pipes.

[0007] As a preferred embodiment of this utility model of a large cement foaming machine, a check piston is provided inside the air outlet, a mushroom cap is provided at the front end of the check piston, a piston plate is provided at the end of the check piston away from the mushroom cap and slidably connected to the air outlet, an air inlet hole communicating with the air outlet is provided at the center of the side end face of the piston plate, and an exhaust hole communicating with the air inlet hole is provided on the side end face of the mushroom cap.

[0008] As a preferred embodiment of this utility model of a large cement foaming machine, a spring is fitted on the check piston, and the check piston and the branch pipe are elastically connected by the spring.

[0009] As a preferred embodiment of this utility model of a large cement foaming machine, the angle between the central axis of the air outlet and the central axis of the exhaust hole is sixty degrees.

[0010] As a preferred embodiment of this utility model of a large cement foaming machine, the cement feeding mechanism includes a feeding hopper, a feeding pipe, a first motor, and an auger rod. The feeding hopper is connected to the side wall of the first mixing chamber through the feeding pipe. The auger rod is installed inside the feeding pipe, and the first motor is installed on the outside of the feeding pipe to drive the auger rod.

[0011] As a preferred embodiment of this utility model of a large-scale cement foaming machine, the foaming agent feeding mechanism includes a foaming agent cylinder, a pipeline pump, and a foaming pipe. The bottom of the foaming agent cylinder is connected to the upper end face of the first mixing chamber through the pipeline pump and the foaming pipe.

[0012] As a preferred embodiment of this utility model of a large-scale cement foaming machine, the foaming tube is a Venturi tube, an air intake is provided on the side end face of the foaming tube, and a dustproof net is provided at the end of the air intake.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model achieves phased optimization of cement foaming by setting up a double-layer mixing structure with a first mixing chamber and a second mixing chamber, combined with a high-pressure air injection system in the secondary foaming mechanism. After the first mixing chamber completes the basic mixing of cement and foaming agent, the material is stirred at high speed in the second mixing chamber by a second mixing shaft with a central pipe and branch pipes. At the same time, the air compressor releases high-pressure air through the air outlet of the branch pipe. The air outlet adopts a 60-degree exhaust hole design, so that the airflow reaction force maintains the stable opening of the check piston, ensuring uniform gas dispersion. This structure solves the problems of low foam content and uneven bubble distribution in traditional single foaming. Through the superposition effect of physical stirring and gas injection, the porosity and structural strength of foamed cement are significantly improved.

[0015] 2. This utility model achieves intelligent control of airflow interruption through the anti-reverse piston structure in the secondary foaming mechanism, which uses a spring, mushroom cap, and piston plate in cooperation. When the air pressure in the branch pipe is higher than the spring force, the piston slides outward to exhaust air; when the air pressure is insufficient, the spring resets, causing the mushroom cap to tightly fit the air outlet, effectively preventing backflow of cement slurry. This solves the technical pain point of easy blockage of air holes due to material backflow, significantly reduces maintenance frequency, and extends the service life of core components. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a top view of the present invention;

[0018] Figure 3 For the present utility model Figure 2 Sectional view of AA in the middle;

[0019] Figure 4 For the present utility model Figure 3 Enlarged view at point B in the middle;

[0020] Figure 5 For the present utility model Figure 3 Enlarged view at point C;

[0021] Figure 6 For the present utility model Figure 4 Enlarged view of point D in the middle.

[0022] In the diagram: 1. Mixing cylinder; 101. First mixing chamber; 102. Second motor; 103. First mixing shaft; 104. Second mixing chamber; 107. Discharge port; 2. Foaming agent feeding mechanism; 201. Foaming agent cylinder; 202. Pipeline pump; 203. Foaming pipe; 2031. Air intake; 2032. Dustproof net; 3. Cement feeding mechanism; 301. Feeding hopper; 302. Feeding pipe; 303. First mixing shaft; 104. Second mixing chamber; 107. Discharge port; 2. Foaming agent feeding mechanism; 201. Foaming agent cylinder; 202. Pipeline pump; 203. Foaming pipe; 203. First mixing shaft; 104. Second mixing chamber; 107. Discharge port; 2. Foaming agent feeding mechanism; 201. Foaming agent cylinder; 202. Pipeline pump; 203. Foaming agent feed pipe; 203. First mixing shaft; 204. Second mixing chamber; 105. Discharge port; 106. Discharge port; 207. Discharge port; 208. Foaming agent feeding mechanism; 201. Foaming agent cylinder; 202. Pipeline pump; 203. Foaming agent feed pipe; 203. Foaming agent feed pipe; 204. Foaming agent feed pipe; 205. Foaming agent feed pipe; 206. Foaming agent feed pipe; 207. Discharge port; 208. Foaming agent feed pipe; 209. Foaming agent feed pipe; 20 ... 1. Motor; 304. Screw rod; 4. Secondary foaming mechanism; 401. Air compressor; 402. Air supply pipe; 403. Second stirring shaft; 4031. Central pipe; 4032. Branch pipe; 4033. Air outlet; 4034. Check piston; 40341. Air inlet; 40342. Exhaust port; 40343. Piston plate; 40344. Mushroom cap; 4035. Spring; 404. Third motor. Detailed Implementation

[0023] Please see Figures 1-6 A large cement foaming machine includes a mixing cylinder 1, a foaming agent feeding mechanism 2 and a cement feeding mechanism 3, and a secondary foaming mechanism 4 is provided below the mixing cylinder 1.

[0024] The mixing cylinder 1 is provided with a first mixing chamber 101 and a second mixing chamber 104 that are connected to it. The first mixing chamber 101 is provided with a first mixing shaft 103 that is rotatably connected. The upper end of the mixing cylinder 1 is provided with a second motor 102 that drives the first mixing shaft 103. The secondary foaming mechanism 4 includes an air compressor 401, an air supply pipe 402, a second mixing shaft 403 and a third motor 404. The second mixing shaft 403 is installed in the second mixing chamber 104 and is rotatably connected to the mixing cylinder 1. The third motor 404 is installed on the mixing cylinder 1 and drives the second mixing shaft 403 through a sprocket and a chain. The second mixing shaft 403 includes a central pipe 4031 and a branch pipe 4032 that are connected through it. The air compressor 401 is connected to the central pipe 4031 through the air supply pipe 402. The branch pipe 4032 is provided with air outlets 4033 evenly arranged. The bottom of the second mixing chamber 104 is provided with a discharge port 107.

[0025] The foaming agent feeding mechanism 2 and the cement feeding mechanism 3 feed the material into the mixing cylinder 1. After being stirred by the first mixing shaft 103, the material falls into the second mixing chamber 104. After being foamed by the secondary foaming mechanism 4, the material is discharged, thereby increasing the foam content of the cement.

[0026] Furthermore, a check piston 4034 is provided inside the air outlet 4033. A mushroom cap 40344 is provided at the front end of the check piston 4034. A piston plate 40343 that is slidably connected to the air outlet 4033 is provided at the end of the check piston 4034 away from the mushroom cap 40344. An air inlet 40341 ​​that communicates with the air outlet 4033 is provided at the center of the side end face of the piston plate 40343. An exhaust port 40342 that communicates with the air inlet 40341 ​​is provided on the side end face of the mushroom cap 40344.

[0027] The air compressor 401 supplies air to the central pipe 4031 through the air supply pipe 402. The high-pressure air reaches the air outlet 4033 through the branch pipe 4032 and is discharged through the exhaust hole 40342 of the piston rod. The air is mixed with the foaming agent and cement to carry out secondary foaming and improve the foaming rate of cement.

[0028] Furthermore, a spring 4035 is fitted on the check piston 4034, and the check piston 4034 and the bronchus 4032 are elastically connected by the spring 4035.

[0029] When the air pressure inside the bronchus 4032 is greater than the elastic force of the spring 4035, the check piston 4034 slides outward, thereby opening the exhaust port 40342 to release air. When the air pressure is insufficient, the check piston 4034 retracts into the exhaust port 4033, thereby blocking the exhaust port 40342 in the bronchus 4032. At this time, although the air pressure inside the bronchus 4032 is insufficient, the bronchus 4032 is still under positive pressure, preventing cement from flowing back into the exhaust port 4033 and blocking the exhaust port 4033, thus improving the stability of the equipment.

[0030] Furthermore, the angle between the central axis of the air outlet 4033 and the central axis of the exhaust port 40342 is sixty degrees.

[0031] When air is blown through the vent 40342, the reaction force of the airflow can push the check piston 4034 to remain open. After the check piston 4034 is retracted into the vent 4033, the outer end face of the vent 4033 can be in contact with the mushroom cap 40344, thereby completely sealing the vent 4033 and preventing cement from entering the vent 4033.

[0032] Furthermore, the cement feeding mechanism 3 includes a feeding hopper 301, a feeding pipe 302, a first motor 303, and an auger rod 304. The feeding hopper 301 is connected to the side wall of the first mixing chamber 101 through the feeding pipe 302. The auger rod 304 is installed inside the feeding pipe 302, and the first motor 303 is installed on the outside of the feeding pipe 302 to drive the auger rod 304.

[0033] The first motor 303 drives the auger rod 304 to rotate, lifting the cement slurry in the feeding hopper 301 into the first mixing chamber 101, realizing automatic feeding. The cement and foaming agent are initially mixed, thereby reducing the subsequent mixing resistance and facilitating secondary foaming.

[0034] Furthermore, the foaming agent feeding mechanism 2 includes a foaming agent cylinder 201, a pipeline pump 202, and a foaming pipe 203. The bottom of the foaming agent cylinder 201 is connected to the upper end face of the first mixing chamber 101 through the pipeline pump 202 and the foaming pipe 203.

[0035] The pipeline pump 202 pumps the foaming agent in the foaming agent cylinder 201 into the first mixing chamber 101. Through the Venturi effect of the foaming pipe 203, a large amount of air is drawn in, causing the foaming agent to mix with the air and generate a large number of bubbles. Then, it is mixed with cement slurry to form foamed cement.

[0036] Furthermore, the foaming tube 203 is a venturi tube, and an air intake 2031 is provided on the side end face of the foaming tube 203, and a dustproof net 2032 is provided at the end of the air intake.

[0037] By installing a dustproof net 2032 at the air intake, workshop dust is prevented from entering the foaming pipe 203 through the air intake pipe, solidifying into a solid after the equipment stops, and clogging the pipe.

[0038] When using this foaming machine, firstly, the cement feeding mechanism 3 is activated, and the first motor 303 is started, driving the auger rod 304 to rotate. The cement slurry in the feeding hopper 301 is lifted into the first mixing chamber 101 through the feeding pipe 302. At the same time, the foaming agent feeding mechanism 2 is activated, and the pipeline pump 202 pumps the foaming agent in the foaming agent cylinder 201 into the first mixing chamber 101 through the foaming pipe 203. Since the foaming pipe 203 is a Venturi tube, under its Venturi effect, a large amount of air is drawn in from the air intake 2031, causing the foaming agent to mix with the air and generate a large number of bubbles. These bubbles are then mixed with the cement slurry entering the first mixing chamber 101. Next, the second motor 102 is activated, driving the first mixing shaft 103 to mix the cement and foaming agent in the first mixing chamber 101. The mixed material falls into the second mixing chamber 104. At this time, the secondary foaming mechanism 4 is activated, and the third motor 404 is started, driving the second mixing shaft 403 to rotate through the sprocket and chain. At the same time, the foaming agent feeding mechanism 2 is activated. Air compressor 401 supplies air to the central pipe 4031 of the second stirring shaft 403 via air supply pipe 402. High-pressure air reaches the outlet 4033 via branch pipe 4032. The check piston 4034 inside the outlet 4033 slides outward under air pressure, and the high-pressure air is discharged from the exhaust hole 40342 on the side end face of the mushroom cap 40344, mixing with foaming agent and cement to achieve secondary foaming. When the air pressure in the branch pipe 4032 is insufficient, the check piston... Under the action of spring 4035, 4034 is drawn into the air outlet 4033. The outer end face of the air outlet 4033 fits against the mushroom cap 40344, sealing the air outlet 4033 and preventing cement backflow. Throughout the process, the cement feeding mechanism 3 achieves automatic feeding, reducing subsequent mixing resistance. The foaming agent feeding mechanism 2 makes the foaming agent and air fully mix to generate bubbles. The secondary foaming mechanism 4 further increases the foam content of the cement, and finally produces foamed cement that meets the requirements and discharges it from the equipment.

[0039] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A large cement foaming machine, comprising a mixing cylinder (1), a foaming agent feeding mechanism (2), and a cement feeding mechanism (3), characterized in that: A secondary foaming mechanism (4) is provided below the mixing cylinder (1); The mixing cylinder (1) is provided with a first stirring chamber (101) and a second stirring chamber (104) communicating with it. A first stirring shaft (103) is rotatably connected in the first stirring chamber (101). A second motor (102) for driving the first stirring shaft (103) is provided at the upper end of the mixing cylinder (1). The secondary foaming mechanism (4) includes an air compressor (401), an air supply pipe (402), a second stirring shaft (403), and a third motor (404). The second stirring shaft... (403) is installed in the second mixing chamber (104) and rotatably connected to the mixing cylinder (1). The third motor (404) is installed on the mixing cylinder (1) to drive the second mixing shaft (403). The second mixing shaft (403) includes a central pipe (4031) and a branch pipe (4032) that are connected through each other. The air compressor (401) is connected through the central pipe (4031) via the air supply pipe (402). The branch pipe (4032) is uniformly provided with air outlets (4033).

2. A large-scale cement foaming machine as described in claim 1, characterized in that: A check piston (4034) is provided inside the air outlet (4033). A mushroom cap (40344) is provided at the front end of the check piston (4034). A piston plate (40343) is provided at the end of the check piston (4034) away from the mushroom cap (40344) and is slidably connected to the air outlet (4033). An air inlet (40341) communicating with the air outlet (4033) is provided at the center of the side end face of the piston plate (40343). An exhaust hole (40342) communicating with the air inlet (40341) is provided on the side end face of the mushroom cap (40344).

3. A large-scale cement foaming machine as described in claim 2, characterized in that: A spring (4035) is fitted on the check piston (4034), and the check piston (4034) and the bronchus (4032) are elastically connected by the spring (4035).

4. A large-scale cement foaming machine as described in claim 3, characterized in that: The angle between the central axis of the air outlet (4033) and the central axis of the exhaust port (40342) is sixty degrees.

5. A large-scale cement foaming machine as described in claim 1, characterized in that: The cement feeding mechanism (3) includes a feeding hopper (301), a feeding pipe (302), a first motor (303), and an auger rod (304). The feeding hopper (301) is connected to the side wall of the first mixing chamber (101) through the feeding pipe (302). The auger rod (304) is installed inside the feeding pipe (302). The first motor (303) is installed on the outside of the feeding pipe (302) to drive the auger rod (304).

6. A large-scale cement foaming machine as described in claim 1, characterized in that: The foaming agent feeding mechanism (2) includes a foaming agent cylinder (201), a pipeline pump (202) and a foaming pipe (203). The bottom of the foaming agent cylinder (201) is connected to the upper end face of the first mixing chamber (101) through the pipeline pump (202) and the foaming pipe (203).

7. A large-scale cement foaming machine as described in claim 6, characterized in that: The foaming tube (203) is a venturi tube, and an air intake (2031) is provided on the side end face of the foaming tube (203). A dustproof net (2032) is provided at the end of the air intake.

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