Arch breaking and flushing unloading device for cement powder bin

Abstract

The utility model provides a cement powder bin broken arch washing and unloading device. The utility model discloses a bin main body, including cylindrical jar body and fixedly connected in the lower part of jar body's inverted cone cone, the cone bottom is equipped with cylindrical discharge gate, feed inlet subassembly is located in the central position of jar body top, including the feed pipe of inserting jar body inside, the arc buffer pad of fixed in the below of feed pipe export and the equal division board of fixed in the below of buffer pad, the gas cannon group subassembly includes the upper and lower two group gas cannon groups of the layering setting along the cone axial direction, and each group gas cannon group is evenly distributed along the circumference of cone, and the cylinder body of gas cannon group is fixed to the outside of cone through support, and its nozzle passes through the cone wall of cone and extends into the inside and is towards the discharge gate, high pressure compressed air blowing device is located above gas cannon group, and the nozzle adopts the porous metal nozzle, and the included angle with the cone bus is 10~18 DEG.

Description

Technical Field

[0001] This utility model relates to the field of powder storage technology, and in particular to a cement powder silo arch-breaking flushing unloading device. Background Technology

[0002] In industrial production, cement powder silos are widely used in cement production, construction, and other fields due to their large storage capacity and high space utilization. The lower part of these silos is usually designed as an inverted conical structure to facilitate the collection and unloading of powder. However, due to factors such as the weight of the cement powder itself, the friction between particles, and differences in flowability, the powder is prone to bridging and accumulation in the transition area between the cone and the discharge port, resulting in poor discharge and seriously affecting the continuity of production.

[0003] In existing technologies, the main solutions to the problem of powder accumulation are either a single air cannon group for breaking up the bridging or a single purging device. Among them, the single air cannon group can only loosen the powder through instantaneous impact, and the loosened powder is prone to secondary accumulation at the bottom of the cone under the action of gravity, which cannot fundamentally solve the blockage problem; the single purging device, on the other hand, has a limited airflow coverage range and is easily affected by local powder bridging at the discharge port, making it difficult to adapt to the production requirements of continuous discharge from cement powder silos.

[0004] Therefore, there is an urgent need to design a collaborative structure that integrates feed optimization, arch breaking, and continuous purging to address the shortcomings of traditional devices. Utility Model Content

[0005] To address the aforementioned technical problems, a cement powder silo arch-breaking and flushing unloading device is provided. The technical means employed in this invention are as follows: A cement powder silo arch-breaking and flushing unloading device includes: The main body of the silo includes a cylindrical tank and an inverted conical cone fixedly connected to the lower part of the tank, wherein the bottom of the cone is provided with a cylindrical discharge port; The feed inlet assembly is located at the center of the top of the tank and includes a feed pipe inserted into the tank, an arc-shaped buffer pad fixed below the feed pipe outlet, and a distribution plate fixed below the buffer pad. The air cannon assembly includes two air cannons arranged in layers along the axial direction of the cone, with each air cannon evenly distributed along the circumference of the cone. The cylinder of the air cannon is fixed to the outside of the cone by a bracket, and its nozzle extends through the cone wall into the interior and faces the discharge port. The high-pressure compressed air blowing device consists of two sets, located above the corresponding upper and lower air cannon sets. The nozzles are multi-hole metal nozzles with an angle of 10~18° with the generatrix of the cone.

[0006] Furthermore, the tank body is formed by welding steel plates, and the inner wall is treated with wear-resistant and corrosion-resistant materials.

[0007] Furthermore, the cone angle of the cone is 72° to 78°, and the cone and the tank are connected by a flange seal. A fluororubber gasket is provided between the flanges, and bolts are used for fastening.

[0008] Furthermore, the buffer pad is fixed by three brackets and is located 100-150mm below the feed pipe.

[0009] Furthermore, the angle between the feed pipe and the top of the tank is 33° to 48°, and the cone angle of the equalizing plate is 110°.

[0010] Furthermore, the angle between the nozzle of the air cannon assembly and the cone wall is 17° to 28°.

[0011] Furthermore, the high-pressure compressed air blowing device uses a multi-hole metal nozzle, which is tilted downwards at 40°~45°.

[0012] This utility model has the following advantages: 1. The air cannon assembly of this utility model adopts an installation method of layering along the axial direction of the cone and evenly distributing it circumferentially. The nozzle faces the discharge port. Compared with the traditional single air cannon which can only impact a local area, this installation method can impact from different heights and different circumferential angles of the cone at the same time, covering the high-incidence area of ​​powder bridging, realizing full-area and multi-angle arch breaking, completely breaking hard bridges, and avoiding local residual bridges blocking the discharge.

[0013] 2. The present invention first breaks down the existing rigid bridge, and the multi-hole nozzle of the high-pressure blowing device can form a large-scale uniform airflow to cover the cone area above the air cannon, filling the coverage blind spot of traditional single blowing. At the same time, the installation position above the air cannon can thoroughly flush the powder adhering to the cone wall and avoid local residue.

[0014] 3. After the air cannon breaks the bridging, the loosened powder moves towards the discharge port, while the high-pressure air blowing device above can flush the residual powder on the cone wall from top to bottom and push it to the discharge port. Compared with the shortcomings of traditional single air cannons that only loosen but do not clean, this installation method can prevent the loosened powder from accumulating again at the bottom or wall of the cone, and completely solve the problem of secondary blockage after breaking the arch. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

[0017] In the diagram: 1-feed pipe, 2-buffer pad, 3-distribution plate, 4-tank body, 5-cone, 6-high pressure compressed air, 7-air cannon assembly, 8-discharge port, 9-PLC control cabinet. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] like Figure 1 As shown in the figure, this utility model embodiment discloses a cement powder silo arch-breaking and flushing unloading device, comprising: The main body of the silo includes a cylindrical tank 4 and an inverted conical cone 5 fixedly connected to the lower part of the tank 4. The bottom of the cone 5 is provided with a cylindrical discharge port 8. The feed inlet assembly is located at the center of the top of the tank body 4, including a feed pipe 1 inserted into the tank body 4, an arc-shaped buffer pad 2 fixed below the outlet of the feed pipe 1, and a distribution plate 3 fixed below the buffer pad 2. The air cannon assembly includes two air cannon groups 7 arranged in layers along the axial direction of the cone 5. Each air cannon group 7 is evenly distributed around the cone 5. The cylinder of the air cannon group 7 is fixed to the outside of the cone 5 by a bracket, and its nozzle extends into the interior through the cone wall of the cone 5 and faces the discharge port 8. The high-pressure compressed air blowing device 6 consists of two sets, located above the corresponding upper and lower air cannon sets 7. The nozzles are multi-hole metal nozzles, with an angle of 10~18° between them and the generatrix of the cone 5.

[0020] Furthermore, the tank body 4 is welded from Q235B steel plate, and the inner wall is treated with wear-resistant and corrosion-resistant materials.

[0021] Furthermore, the cone angle of the cone 5 is 72° to 78°, and the cone 5 is sealed to the tank 4 through a flange. A fluororubber sealing gasket is provided between the flanges, and bolts are used for fastening.

[0022] Furthermore, the buffer pad 2 is fixed by three brackets and is located 100-150mm below the feed pipe 1.

[0023] Optionally, the angle between the feed pipe and the top of the tank is 33° to 48°, and the cone angle of the equalizing plate is 110°.

[0024] Optionally, the angle between the nozzle of the air cannon assembly and the cone wall is 17° to 28°.

[0025] Optionally, the high-pressure compressed air blowing device 6 adopts a multi-hole metal nozzle, with the nozzle tilted downward at 40°~45° and forming an angle of 15° with the generatrix of the cone.

[0026] In the implementation of this invention, either a mechanized control scheme or a PLC control scheme can be adopted, wherein, The mechanized control scheme includes a spring-type pressure triggering mechanism distributed circumferentially along the inner wall of the cone 5, and a pneumatic delay valve connected in series in the air path of the high-pressure compressed air blowing device 6. The spring-type pressure triggering mechanism includes a pressure plate flush with the inner wall of the cone 5, a return spring, and a trigger rod. The return spring has a preset stiffness, and the threshold value of the pressure plate compressed by the powder pressure is a preset value. The trigger rod moves with the pressure plate to open the pneumatic control valve of the air cannon group 7. The pneumatic delay valve is controlled by the working airflow of the air cannon group 7 to achieve linkage with the air cannon group 7.

[0027] The PLC control scheme includes a PLC control cabinet and a pressure sensor located in the bridging area on the inner wall of the cone 5. The PLC control cabinet is electrically connected to the air cannon group 7, the high-pressure compressed air blowing device 6, and the pressure sensor. The pressure sensor detects the bridging pressure of the powder in real time and sends a signal to the PLC control cabinet. The PLC control cabinet controls the air cannon group 7 to start breaking the arch, and after a delay of 0.3-0.6 seconds, it starts the high-pressure compressed air blowing device 6 to flush the material.

[0028] Alternatively, in a more streamlined manner, pressure sensors can be installed only in the bridging areas on the inner wall of cone 5 for manual monitoring. Once the pressure sensor readings reach the preset value, staff can activate the air cannon assembly and the high-pressure compressed air blowing device to break up the arches and purge the air.

[0029] The specific method of using this invention is as follows: Cement powder enters the feed pipe 1 through an external conveying pipe. It is then introduced into the tank 4 through the feed pipe 1, which is at an angle of 33° to 48° to the top of the tank 4. During the fall, it first contacts the arc-shaped buffer pad 2 100-150mm below the feed pipe 1. After being buffered on the surface of the wear-resistant rubber buffer pad 2, it falls onto the equalization plate 3 and is evenly distributed in the tank 4 along the conical surface of the equalization plate 3, avoiding local accumulation and compaction.

[0030] When powder forms a bridge on the inner wall of cone 5, if a PLC control scheme is adopted, the pressure sensor detects the pressure signal and transmits it to the PLC control cabinet 9. The PLC control cabinet controls the upper and lower sets of air cannons 7 to start, spraying a strong airflow to break up the powder bridge. After a delay of 0.3-0.6 seconds, the PLC control cabinet starts the corresponding high-pressure compressed air blowing device 6. The multi-hole nozzle sprays a continuous airflow at an angle of downward tilt to flush the residual powder on the wall of cone 5 and push the bottom plate of the powder outlet 8 to the outlet 8 to complete the unloading. If a mechanized control scheme is adopted, the powder bridging pressure pushes the pressure plate to compress the spring, and the trigger rod opens the pneumatic control valve of the air cannon group 7, and the air cannon group 7 starts to break the arch. The working airflow of the air cannon enters the control port of the pneumatic delay valve at the same time. After a delay of 0.3-0.6 seconds, the pneumatic delay valve opens the air passage of the high-pressure compressed air blowing device 6 to achieve flushing and unloading. After the powder is discharged, the pressure on the wall of cone 5 drops. If it is a mechanized control scheme, the reset spring pushes the pressure plate and trigger rod to reset, the air cannon control valve closes, and the pneumatic delay valve automatically shuts off the high-pressure compressed air blowing device 6 after losing control of the airflow, and the device returns to the standby state.

[0031] Of course, whether it is a mechanized solution or a PLC control solution, the valves, control equipment, sensors, etc. used can all adopt existing technologies.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A cement powder silo arch-breaking and flushing unloading device, characterized in that, include: The main body of the silo includes a cylindrical tank (4) and an inverted conical cone (5) fixedly connected to the lower part of the tank (4). The bottom of the cone (5) is provided with a cylindrical discharge port (8). The feed inlet assembly is located at the center of the top of the tank (4), including a feed pipe (1) inserted into the tank (4), an arc-shaped buffer pad (2) fixed below the outlet of the feed pipe (1), and a distribution plate (3) fixed below the buffer pad (2). The air cannon assembly includes two air cannon groups (7) arranged in layers along the axial direction of the cone (5). Each air cannon group (7) is evenly distributed along the circumference of the cone (5). The cylinder of the air cannon group (7) is fixed to the outside of the cone (5) by a bracket, and its nozzle extends into the interior through the cone wall of the cone (5) and faces the discharge port (8). The high-pressure compressed air blowing device (6) consists of two sets, located above the corresponding upper and lower air cannon sets (7). The nozzles are multi-hole metal nozzles with an angle of 10~18° with the generatrix of the cone (5).

2. The cement powder silo arch-breaking and flushing unloading device according to claim 1, characterized in that, The tank (4) is formed by welding steel plates and the inner wall is treated with wear-resistant and corrosion-resistant materials.

3. The cement powder silo arch-breaking and flushing unloading device according to claim 1, characterized in that, The cone (5) has a cone angle of 72° to 78°. The cone (5) and the tank (4) are connected by a flange seal. A fluororubber gasket is provided between the flanges and bolts are used for fastening.

4. The cement powder silo arch-breaking and flushing unloading device according to claim 1, characterized in that, The buffer pad (2) is fixed by three brackets and is located 100-150mm below the feed pipe (1).

5. The cement powder silo arch-breaking and flushing unloading device according to claim 1, characterized in that, The angle between the feed pipe and the top of the tank is 33° to 48°, and the cone angle of the equalizing plate is 110°.

6. The cement powder silo arch-breaking and flushing unloading device according to claim 1, characterized in that, The angle between the nozzle of the air cannon assembly and the cone wall is 17° to 28°.

7. The cement powder silo arch-breaking and flushing unloading device according to claim 1, characterized in that, The high-pressure compressed air blowing device uses a multi-hole metal nozzle, which is tilted downwards at 40°~45°.

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