Cement silo discharge homogenizing device

Abstract

This utility model relates to the field of cement transportation channels and discloses a cement silo discharge homogenization device, including a canvas discharge channel inclinedly arranged on one side of the cement silo. A protective sleeve is inserted on the side of the cement silo near the canvas discharge channel. The surface of the protective sleeve has several air outlets. A fluidizing rod is detachably inserted into the inner wall of the protective sleeve. The surface of the fluidizing rod has several air outlet gaps. This utility model uses the air outlet gaps on the surface of the fluidizing rod to supplement air and homogenize the material accumulation area at the bottom of the cement silo by inserting a fluidizing rod on the side of the cement silo near the canvas discharge channel, effectively dispersing the compacted cement in this area. The detachable protective sleeve on the outer surface of the fluidizing rod allows for easy replacement of the fluidizing rod when it becomes clogged, significantly reducing maintenance difficulty and downtime, and improving equipment operating efficiency.

Description

Technical Field

[0001] This utility model relates to the field of cement transportation channels, and in particular to a cement silo discharge homogenization device. Background Technology

[0002] Cement silos are core facilities in the cement production and storage process. Their bottoms are usually connected to inclined canvas discharge channels. Compressed air is introduced into the channels to fluidize the cement material and achieve stable discharge. However, the side of the cement silo closest to the canvas discharge channel is a critical area where the material flow direction changes. Cement particles are very prone to accumulate and compact here, forming arches or blockages, which seriously affect the smoothness of material discharge. To solve the material blockage problem at the bottom of the cement silo, the existing technology generally adopts the method of inserting an air injection pipe at the discharge position of the cement silo. Compressed air is blown into this area to disperse the compacted cement and restore its fluidity.

[0003] Regarding the aforementioned technologies, the inventors believe that the air outlets of existing canvas channels and air supply pipes are directly exposed to cement materials. Cement fine powder is very easy to seep into and adhere to the hole walls when the air pressure fluctuates or the machine stops. Long-term accumulation leads to air blockage, reduced air supply effect, or even failure. Furthermore, since the air supply pipe usually adopts an integral structure, once it is blocked, the entire pipe needs to be pulled out for cleaning or replacement. The extraction resistance is high, which can easily cause a large amount of cement leakage. The maintenance workload is large and time-consuming, which seriously affects the continuity of production.

[0004] The information disclosed above in this background section is only intended to enhance the understanding of the background section of this utility model, and therefore may include prior art that is not known to those skilled in the art. Utility Model Content

[0005] To address the problem of easy damage and high maintenance requirements of the discharge chute in cement silos, this utility model provides a cement silo discharge homogenization device.

[0006] The cement silo discharge homogenization device provided by this utility model adopts the following technical solution: A cement silo discharge homogenization device includes a canvas discharge channel arranged at an incline on one side of the cement silo, a protective sleeve inserted on the side of the cement silo near the canvas discharge channel, and a plurality of air outlets opened on the surface of the protective sleeve. The inner wall of the protective sleeve is detachably fitted with a fluidizing rod. The surface of the fluidizing rod is provided with several air outlet gaps. Gas enters the fluidizing rod and is blown out from the air outlet gaps to replenish and homogenize the material accumulation area in the silo where the bottom side wall of the cement silo intersects with the inlet of the canvas discharge channel.

[0007] Preferably, the canvas discharge channel includes an inclined channel, canvas laid on the inner wall of the inclined channel, and an air inlet pipe connected to the bottom end of the inclined channel.

[0008] Preferably, the center of the protective sleeve is on the same axis as the center of the fluidizing rod.

[0009] Preferably, the end of the protective sleeve away from the air inlet of the fluidizing rod is configured as a cone structure to guide the protective sleeve into the cement silo.

[0010] Preferably, the fluidizing rod is fixed inside the protective sleeve by bolts.

[0011] Preferably, the air inlet end of the fluidizing rod is connected to a one-way check valve, which is used to prevent cement ash from flowing back into the air inlet pipe from inside the fluidizing rod.

[0012] Preferably, the surface of the protective sleeve is fixed with an opening sealing flange, and the opening sealing flange is installed on the cement silo.

[0013] In summary, this utility model has the following beneficial technical effects: By inserting fluidizing rods on the side of the cement silo near the canvas discharge channel, air is supplied to the material accumulation area at the bottom of the silo through the air outlet gaps on the surface of the fluidizing rods, effectively dispersing the compacted cement in this area. This solves the problems of poor fluidity and easy arching and blockage caused by material accumulation at the bottom of the cement silo. A removable protective sleeve is fitted over the outer surface of the fluidizing rods, covering the surface of the fluidizing rods and preventing cement from directly contacting and clogging the air outlet gaps, thus extending the service life of the fluidizing rods. When the fluidizing rods become blocked, they only need to be pulled out of the protective sleeve for replacement, while the protective sleeve remains inside the silo without needing to be removed, greatly reducing maintenance difficulty and downtime, and improving equipment operating efficiency. At the same time, the front end of the protective sleeve is designed with a conical structure, making it easy to insert into the cement material and reducing installation difficulty. In addition, the one-way check valve at the air inlet effectively prevents cement ash from flowing back into the air inlet pipeline, ensuring the clean and stable operation of the air supply system. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a cement silo discharge homogenization device according to an embodiment of this utility model; Figure 2 This is a disassembled structural diagram of an embodiment of the utility model; Figure 3 This is a schematic diagram of the fluidizing rod structure according to an embodiment of the utility model; Figure 4 This is a side view structural diagram of an embodiment of the utility model; Figure 5 yes Figure 4 Enlarged view of the structure at point A; Figure 6 This is a schematic diagram of the protective sleeve structure according to an embodiment of the utility model.

[0015] Explanation of reference numerals in the attached drawings: 1. Cement silo; 2. Canvas discharge channel; 21. Inclined chute channel; 22. Canvas; 23. Air inlet pipe; 3. Fluidizing rod; 4. Protective sleeve; 41. Air outlet; 42. Conical structure; 5. One-way check valve; 6. Perforated sealing flange. Detailed Implementation

[0016] The following is in conjunction with the appendix Figure 1-6 This utility model will be described in further detail.

[0017] This utility model discloses a cement silo discharge homogenization device, which is suitable for the discharge conditions at the bottom of cement storage silos, especially for cement discharge scenarios where the material at the bottom of cement silo 1 has poor flowability and is prone to compaction and arching. It can be widely used in the discharge systems of various cement storage facilities such as cement steel silos, cement storage tanks, and cement steel silos.

[0018] Reference Figure 1 - Figure 3 The system includes a canvas discharge channel 2 connected to the side wall of the cement silo 1. A protective sleeve 4 is inserted on one side of the bottom of the cement silo 1 near the canvas discharge channel 2. Several circular or elongated air outlets 41 are evenly opened on the side wall of the protective sleeve 4. A fluidizing rod 3 is detachably inserted into the internal cavity of the protective sleeve 4. The fluidizing rod 3 is set with the same length as the protective sleeve 4, and several regularly arranged air outlet gaps are distributed on the outer wall of the fluidizing rod 3 along the axial and circumferential directions.

[0019] Reference Figure 2 - Figure 4 Cement silo 1 is used for long-term storage of bulk cement materials. A canvas discharge channel 2 is connected to the bottom outlet of the cement silo to smoothly transport the cement materials to downstream equipment such as elevators and packaging machines. An external air source from the plant's fluidizing blower is connected to the fluidizing rod 3 and the canvas discharge channel 2 via an inlet pipe 23. The airflow is ejected from the air outlet gaps of the fluidizing rod 3 and the canvas discharge channel 2, passing through the air outlet 41 of the protective sleeve 4. The airflow then converges with the bottom side wall of cement silo 1 at the inlet of the canvas discharge channel 2, where it enters the converging accumulation area for supplementary airflow, fluidization, and homogenization. This converging accumulation area is located at the bottom inner side of cement silo 1, above the inlet of the inclined channel 21 of the canvas discharge channel 2. The fluidizing rod 3 and the protective sleeve 4 extend laterally through the side wall of cement silo 1 into this converging accumulation area. The area is approximately 2 meters deep. Cement falls vertically from the silo into this area and then flows obliquely downwards into the canvas discharge channel 2. During the material turning process, it is most prone to compression and caking. The airflow sprayed by the fluidizing rod 3 directly acts on this converging and accumulating area to disperse and compact the cement, effectively eliminating the risk of material blockage. When the fluidizing rod 3 becomes blocked after long-term use, it can be quickly pulled out from the protective sleeve 4 for replacement. The protective sleeve 4 is left in the silo. After replacement, it can be reinserted to restore its use. The fluidizing rod 3 and the protective sleeve 4 extend into the cement silo 1 about two meters to ensure the cement homogenization effect in this area.

[0020] Reference Figure 4 The canvas discharge channel 2 includes an inclined steel chute channel 21, a breathable canvas 22 that is laid on the inner wall support mesh plate at the bottom of the chute channel 21, and an air inlet pipe 23 connected to the bottom of the chute channel 21. The chute channel 21 is arranged with an inclination angle of 3°-8°, which ensures that the material can flow autonomously by gravity and prevents the material flow rate from getting out of control due to excessive inclination angle. The low-pressure compressed air connected to the fluidized air inlet pipe 23 is sprayed evenly upward through the breathable canvas, so that the cement material in the channel remains fluidized throughout the process, effectively preventing the material from settling and caking at the bottom of the channel.

[0021] Reference Figure 6 The central axis of the protective sleeve 4 is completely aligned with the central axis of the fluidizing rod 3, so that a uniform annular air guide gap is formed between the outer wall of the fluidizing rod 3 and the inner wall of the protective sleeve 4. The airflow ejected from the air outlet gap of the fluidizing rod 3 can first complete uniform pressure diffusion within the annular gap, and then be uniformly ejected outward from the air outlet 41 on the side wall of the protective sleeve. This effectively avoids the problem of uneven fluidization caused by local airflow concentration and lack of airflow coverage in some areas, and ensures that the replenishment airflow fluidization effect of the entire discharge connection area remains consistent.

[0022] One end of the protective sleeve 4 inserted into the cement silo 1 is set as a tapered structure 42 with a reduced diameter. The outer surface of the tapered structure 42 is a smooth arc transition surface. During on-site installation, the tapered structure 42 can break through the compacted cement layer like a drill bit, which greatly reduces the resistance when the protective sleeve 4 is inserted into the cement material. Without the need for large hammering equipment, the protective sleeve 4 and the fluidizing rod 3 can be pushed smoothly into the silo wall of the cement silo 1 by manual pushing force. The installation work can be completed by a single person, which effectively reduces the construction difficulty and safety risks of high-altitude silo tops.

[0023] Reference Figure 5 and Figure 6The protective sleeve 4 has corresponding threaded holes radially opened on its side wall, and the fluidizing rod 3 has corresponding positioning blind holes with a depth of 5mm-10mm opened on its outer wall. The protective sleeve 4 is secured to the positioning blind holes on the outer surface of the fluidizing rod 3 by means of an internal hexagonal locking bolt that passes through the threaded holes, so as to achieve detachable fixation of the two and effectively prevent the fluidizing rod 3 from axial movement under the impact of airflow. When the fluidizing rod 3 becomes clogged or worn after long-term use, it is only necessary to loosen the outer locking bolt to remove the fluidizing rod 3 from the protective sleeve 4. The protective sleeve 4 can be quickly pulled out and replaced, and it remains inside the cement silo 1 throughout the process without needing to be removed or the remaining cement in the silo needs to be emptied. This significantly reduces equipment downtime and improves the overall operating efficiency of the cement silo. As an alternative, the protective sleeve 4 and the fluidizing rod 3 can be positioned by using end quick-release clamps to hold the mating end faces together. No tools are required for the entire disassembly and assembly process. In another alternative embodiment, the inner wall of the protective sleeve 4 is provided with an axial guide groove and the outer wall of the fluidizing rod 3 is provided with a guide protrusion. After screwing them together, the end pins can be used to lock them in place to prevent circumferential misalignment.

[0024] The air inlet end of the fluidizing rod 3, which extends out of the protective sleeve 4, is connected to a one-way check valve 5 via a quick-connect clamp connector. The opening pressure of the one-way check valve 5 is set to 0.01 MPa, which is suitable for the normal air supply pressure of the cement silo fluidization system. When the external air source temporarily stops supplying air, the one-way check valve 5 will automatically close and seal under the pressure of the cement in the silo, thereby preventing cement ash from flowing back from the inside of the fluidizing rod 3 into the front air inlet pipe under the positive pressure in the silo, avoiding ash accumulation and blockage in the pipe, and extending the cleaning and maintenance cycle of the air supply pipe.

[0025] A steel perforated sealing flange 6 is welded and fixed to the outer wall of the protective sleeve 4 near the outer side. The flange end face of the perforated sealing flange 6 is completely fitted and sealed to the outer wall of the canvas discharge channel 2. After being locked by four sets of circumferentially evenly distributed fastening bolts, a gapless seal is achieved at the insertion position of the protective sleeve 4, thereby preventing cement dust from leaking out from the opening. This ensures the airtightness of the device and also prevents dust from overflowing on site, improving the workshop working environment.

[0026] The actual installation process of this device can be flexibly adjusted according to the width of the discharge port at the bottom of the cement silo 1. The length of a single fluidizing bar 3 can be set to 1.5m-2.5m, effectively covering the entire width range of the bottom of the cement silo 1. Multiple fluidizing bars 3 can be arranged at intervals of 300mm-500mm along the width direction of the bottom of the cement silo 1 to form an array-type air replenishment and homogenization system, which is suitable for large, medium and small cement silos of different specifications. In actual operation, low-pressure compressed air is simultaneously connected to the fluidizing air inlet pipe 23 of the canvas discharge channel 2 and the air inlet end of all fluidizing bars 3. The material in the channel is fluidized and conveyed by the bottom canvas, and the compacted material at the bottom of the cement silo 1 is dispersed and homogenized in all directions by the airflow sprayed from the fluidizing bars 3. There is no material blockage or arching throughout the process, and the discharge stability is improved by more than 70% compared with the traditional single canvas discharge channel. It can operate continuously and stably for a long time.

[0027] The implementation principle of the cement silo discharge homogenization device in this embodiment of the utility model is as follows: Cement in cement silo 1 enters canvas discharge channel 2 under the action of gravity. Compressed air enters the air inlet end of fluidizing rod 3 through the external air supply pipeline. After flowing inside the fluidizing rod 3, it is blown out from the air outlet gap on the surface of the rod to replenish and homogenize the material accumulation area in cement silo 1 on the side close to canvas discharge channel 2, disperse the compacted cement in this area, improve the material flowability, and ensure that the cement smoothly enters canvas discharge channel 2.

[0028] The outer surface of the fluidizing rod 3 is covered with a protective sleeve 4. Gas is blown out from the air outlet 41 of the protective sleeve 4 through the air outlet gap. The protective sleeve 4 covers the surface of the fluidizing rod 3 to prevent cement from directly contacting and clogging the air outlet gap. The front end of the protective sleeve 4 is a conical structure 42, which makes it easy to insert into the cement in the cement silo 1. When the fluidizing rod 3 becomes clogged after long-term use, the fluidizing rod 3 can be quickly pulled out from the protective sleeve 4 for replacement. The protective sleeve 4 is left in the silo. After replacement, it can be reinserted to restore its use.

[0029] The air inlet is equipped with a one-way check valve 5 to prevent cement ash from flowing back into the external air supply pipeline from inside the fluidizing rod 3. The fluidizing rod 3 is fixed to the canvas discharge channel 2 through the perforated sealing flange 6 to prevent cement from leaking from the perforation.

[0030] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made based on the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A cement silo discharge homogenization device, comprising a canvas discharge channel (2) arranged obliquely on one side of the cement silo (1), characterized in that A protective sleeve (4) is inserted on the side of the cement silo (1) close to the canvas discharge channel (2), and a plurality of gas outlets (41) are formed on the surface of the protective sleeve (4); A fluidizing rod (3) is detachably inserted into the internal cavity of the protective sleeve (4), and a plurality of gas outlet slits are formed on the surface of the fluidizing rod (3); gas enters the fluidizing rod (3) and is blown out from the gas outlets (41) through the gas outlet slits, thereby supplementing and homogenizing the accumulated material in the intersection area of the bottom side wall of the cement silo (1) and the inlet of the canvas discharge channel (2).

2. A cement silo outflow homogenizing device according to claim 1, characterized in that: The canvas discharge channel (2) comprises an inclined chute channel (21), a canvas (22) laid on the inner wall of the inclined chute channel (21), and an air inlet pipe (23) connected to the bottom end of the inclined chute channel.

3. A cement silo outflow equalization device according to claim 1, characterized in that: The center of the protective sleeve (4) and the center of the fluidizing rod (3) are on the same axis.

4. A cement silo outflow equalization device according to claim 1, characterized in that: One end of the protective sleeve (4) away from the air inlet end of the fluidizing rod (3) is provided with a conical structure (42) for guiding the insertion of the protective sleeve (4) into the cement silo (1).

5. A cement silo outflow equalization device according to claim 1, characterized in that: The fluidizing rod (3) is fixed in the protective sleeve (4) by means of bolts.

6. A cement silo outflow equalization device according to claim 1, characterized in that: The air inlet end of the fluidizing rod (3) is communicated with a one-way check valve (5) for preventing cement from flowing back from the inside of the fluidizing rod (3) into the air inlet pipeline.

7. A cement silo outflow equalization device according to claim 1, characterized in that: An open hole sealing flange (6) is fixed on the surface of the protective sleeve (4), and the open hole sealing flange (6) is installed on the cement silo (1).

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