Pneumatic powder conveying pipeline structure

Abstract

The utility model belongs to the technical field of pneumatic conveying, and particularly relates to a pneumatic powder conveying pipeline structure which comprises a power source, a feeding device used for introducing powder particles into airflow and a conveying pipeline connected with the power source and the feeding device and used for conveying the powder particles to a terminal bin. The gas supplementing devices are used for supplementing extra gas required due to pressure loss or insufficient gas flow in the powder particle conveying process; the gas supply device comprises a gas supply assembly used for providing high-pressure gas, a gas supply channel used for connecting the gas supply assembly with the conveying pipeline, a valve installed on the gas supply channel, a pressure sensor used for detecting the internal pressure of the conveying pipeline and a controller connected with the pressure sensor and the valve. According to the comparison result of the real-time pressure, detected by the pressure sensor, of the conveying pipeline and the preset pressure threshold value, the opening degree of the valve is controlled, extra gas is supplemented to the conveying pipeline, it is ensured that the pressure in the pipeline is stable, and stable conveying of powder particles is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of pneumatic conveying, and particularly relates to a pneumatic conveying powder pipeline structure. BACKGROUND

[0002] The pneumatic conveying powder pipeline system is a high-efficiency powder conveying mode, which uses the power of compressed air flow provided by a power source to convey powdery materials from one place to another. In the traditional pneumatic conveying powder pipeline structure, due to factors such as pipeline friction, collision between powder particles, and pipeline bends, the air flow pressure gradually decreases. When the pressure decreases to a certain extent, the powder particles may be blocked at the pipeline bends, which may not maintain the stable conveying of the powder particles, resulting in a decrease in conveying efficiency or even interruption of conveying. Meanwhile, unstable conveying pressure and air flow may cause additional wear of the conveying pipeline and equipment, shorten the service life of the equipment, and increase the probability of failure. SUMMARY

[0003] In view of the above problems, the utility model aims to provide a pneumatic conveying powder pipeline structure to solve the problems of a decrease in powder conveying efficiency or interruption of conveying of powder particles in the conveying process.

[0004] The utility model provides a pneumatic conveying powder pipeline structure, which comprises a power source for providing compressed air flow to drive the whole conveying process, a feeding device for introducing powder particles into the air flow, and a conveying pipeline connected with the power source and the feeding device and used for conveying the powder particles to a terminal bin. The utility model further comprises a plurality of air supplementing devices for supplementing additional gas due to pressure loss or insufficient air flow in the conveying process of the powder particles. The air supplementing device comprises a gas supply assembly for providing high-pressure gas, an air supplementing channel for connecting the gas supply assembly with the conveying pipeline, a valve installed on the air supplementing channel and used for controlling the opening and closing state of the air supplementing channel, a pressure sensor for detecting the internal pressure of the conveying pipeline, and a controller connected with the pressure sensor and the valve and used for receiving and processing the pressure signal detected by the pressure sensor to control the opening and closing state of the valve according to preset conditions.

[0005] Preferably, the air supplementing device further comprises a flow regulator arranged in the air supplementing channel and connected with the controller, which is used for finely adjusting the air supplementing amount.

[0006] Preferably, the installation positions of the plurality of air supplementing devices comprise the bends and variable-diameter positions of the conveying pipeline.

[0007] Preferably, a shunt branch pipe is installed on the air supplementing channel of the air supplementing device located at the bend of the conveying pipeline, the shunt branch pipe is installed at the gas outlet end of the air supplementing channel, and the shunt branch pipe is used for unblocking the powder particles blocked at the bend of the conveying pipeline. The direction of the gas in the shunt branch pipe is the same as the direction of the powder flow in the conveying pipeline.

[0008] Preferably, the gas outlet ends of the branch pipes and the air supplement channel are provided with filter screens.

[0009] Preferably, the air supply assembly comprises a compressor for providing high-pressure gas and an air tank connected with the compressor for storing compressed gas.

[0010] Preferably, the air supply assembly comprises a compressor for providing high-pressure gas and an air tank connected with the compressor for storing compressed gas.

[0011] The beneficial effects of the present application are: through the air supplement device, the opening and closing of the air supplement channel and the air supplement amount can be accurately controlled according to the real-time pressure in the conveying pipeline, which ensures the stability and continuity of the powder particles in the conveying process and avoids the interruption of conveying caused by pressure loss or insufficient air flow. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a first perspective structural schematic view of the present application.

[0013] Figure 2 It is a second perspective structural schematic view of the present application.

[0014] Figure 3 It is a sectional structural schematic view of the present application.

[0015] Figure 4 It is an enlarged structural schematic view of A in the present application.

[0016] In the figure: 1, power source; 2, feeding device; 3, terminal bin; 4, conveying pipeline; 5, electric rotary distributor; 6, storage bin; 7, separating device; 8, air supplement device; 9, air supply assembly; 10, air supplement channel; 11, valve; 12, pressure sensor; 13, controller; 14, flow regulator; 15, branch pipe; 16, filter screen; 17, compressor; 18, air tank. DETAILED DESCRIPTION

[0017] In order to make the skilled in the art better understand the technical scheme of the present application, the present application will be described in detail below in combination with the drawings, and the description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the present application.

[0018] The utility model discloses a current pneumatic conveying powder pipeline structure, its mainly includes the power source 1 for providing compressed air flow to drive the whole conveying process, the feed device 2 for introducing the powder particle into the air flow and with power source 1 and feed device 2 are connected, for conveying the powder particle to the terminal warehouse conveying pipeline 4, the feed device 2 is the storage bin 6 with the electric rotary distributor 5 of bottom, power source 1 can adopt Roots blower or air compressor 17, when using, put the powder into the storage bin 6, open the electric rotary powder ware, make the powder in the storage bin 6 evenly down to conveying pipeline 4, open power source 1 and produce high pressure air flow, under the impetus of high pressure air flow, gas-solid mixture is along conveying pipeline 4 high -speed advance, enters into the terminal warehouse, still includes separating device 7 such as cyclone separator, cloth bag dust catcher etc., installs at the top of terminal warehouse, for separating material and air flow, the material after separating enters terminal warehouse, and gas is filtered and then discharged into the atmosphere, above is the introduction of current pneumatic conveying powder pipeline structure.

[0019] From the above, the current pneumatic conveying powder pipeline structure has the following defects in use, in the conveying process of powder particle, due to pipe friction, collision between powder particles and pipe elbow and other factors, the air flow pressure gradually reduces, when the pressure reduces to a certain degree, the stable conveying of powder particle can not be maintained, leading to the decline of conveying efficiency or even the interruption of conveying, and the unstable conveying pressure and air flow can cause additional wear to the conveying pipeline 4 and equipment, shorten the service life of equipment, and increase the probability of failure, based on the above problems, the utility model uses the following improvement mode to solve.

[0020] As Figures 1-4As shown, the air pressure conveying powder pipeline structure comprises a power source 1 for providing a compressed air flow to drive the whole conveying process, a feeding device 2 for introducing powder particles into the air flow, and a conveying pipeline 4 connected with the power source 1 and the feeding device 2 for conveying the powder particles to a terminal bin, and further comprises a plurality of air supplement devices 8 for supplementing additional gas due to pressure loss or insufficient air flow during the conveying process of the powder particles, wherein the air supplement device 8 comprises a gas supply assembly 9 for providing high-pressure gas, an air supplement channel 10 for connecting the gas supply assembly 9 with the conveying pipeline 4, a valve 11 installed on the air supplement channel 10 for controlling the opening and closing state of the air supplement channel 10, a pressure sensor 12 for detecting the pressure inside the conveying pipeline 4, and a controller 13 connected with the pressure sensor 12 and the valve 11 for receiving and processing the pressure signal detected by the pressure sensor 12 to control the opening and closing state of the valve 11 according to the preset conditions. The air supplement device 8 is arranged to control the opening degree of the valve 11 according to the comparison result of the real-time pressure of the conveying pipeline 4 detected by the pressure sensor 12 and the preset pressure threshold value, to supplement additional gas to the conveying pipeline 4, to ensure the stability of the pressure in the pipeline, and to realize the stable conveying of the powder particles. Meanwhile, the stable conveying pressure and air flow also help to reduce the wear of the conveying pipeline 4 and the equipment.

[0021] Further, as shown in Figures 1-2 The flow regulator 14 is connected with the controller 13, and the controller 13 processes the pressure signal transmitted by the pressure sensor 12 to finely adjust the air supplement amount of the air supplement device 8 according to the pressure result in the conveying pipeline 4 detected by the pressure sensor 12, so as to meet the demand of the air supplement amount required when the conveying pipeline 4 transports different powder particles.

[0022] Further, as shown in Figure 1 The installation positions of the plurality of air supplement devices 8 include the elbow and the variable diameter position of the conveying pipeline 4. The air flow disturbance and pressure loss are prone to occur at the elbow and the variable diameter position of the conveying pipeline 4, and the additional gas supplement provided by the air supplement device 8 at the above-mentioned positions can make the powder particles smoothly pass through the elbow and the variable diameter position of the conveying pipeline 4, avoid the accumulation at the elbow and the variable diameter position, and realize the efficient and stable conveying process of the powder particles.

[0023] Further, as shown in Figures 3-4 The shunt branch pipe 15 is installed on the air supplement channel 10 of the air supplement device 8 located at the elbow of the conveying pipeline 4, and the shunt branch pipe 15 is installed at the gas outlet end of the air supplement channel 10. The gas flow direction in the shunt branch pipe 15 is the same as the powder flow direction in the conveying pipeline 4, as shown in Figure 4As shown, the shunt branch pipe 15 is attached to the inside of the conveying pipe near one end of the conveying pipe, and is consistent with the length direction of the conveying pipe. The gas led out of the shunt branch pipe 15 flows radially to the outside of the elbow of the conveying pipe 4, so as to prevent the powder particles from being blocked at the elbow of the conveying pipe 4, and does not affect the normal conveying of the powder particles in the conveying pipe 4, and can also supplement the pressure in the conveying pipe 4, and promote the conveying rate of the powder particles.

[0024] Further, as shown in Figure 4 the shunt branch pipe 15 and the gas outlet end of the air supplement channel 10 are both provided with a filter screen 16, and the spatial aperture of the filter screen 16 is smaller than the particle size of the powder particles, as shown in Figure 4 the filter screen 16 at the gas outlet end of the air supplement channel 10 is located outside the shunt branch pipe 15, and in the process of conveying the powder, the filter screen 16 can prevent impurities and powder particles from entering the air supplement system, causing blockage or damage, thereby enhancing the reliability and durability of the system, and also facilitating the maintenance and cleaning of the system.

[0025] Further, as shown in Figures 1-2 the gas supply assembly 9 includes a compressor 17 and an air tank 18, so that the air supplement system can continuously and stably provide high-pressure gas. The compressor 17 is responsible for generating high-pressure gas, and the air tank 18 is used for storing and adjusting the gas pressure, to ensure the stability and reliability of the air supplement process. In use, the air supplement pipe is connected with the air tank 18, for conveying high-pressure gas into the conveying pipe 4 when needed.

[0026] Further, as shown in Figures 1-3 the safety device is also included, and when the pressure sensor 12 detects that the pressure in the conveying pipe 4 abnormally rises or falls, i.e. far below or far above the preset pressure value, the signal is transmitted to the controller 13, and the controller 13 automatically cuts off the power source 1, which can be a Roots blower or an air compressor 17 or the air supplement device 8. This effectively prevents equipment damage, safety accidents or environmental pollution caused by abnormal pressure, and improves the safety and reliability of the system.

Claims

1. A pneumatic powder conveying pipeline structure, comprising a power source (1) for providing a compressed gas flow to drive the whole conveying process, a feeding device (2) for introducing powder particles into the gas flow, and a conveying pipeline (4) connected with the power source (1) and the feeding device (2) for conveying the powder particles to a terminal bin (3), characterized in that: The device further comprises a plurality of air supplementing devices (8) for supplementing air due to pressure loss or insufficient air flow during the powder particle conveying process, wherein the air supplementing device (8) comprises an air supply assembly (9) for providing high-pressure air, an air supplementing channel (10) for connecting the air supply assembly (9) with the conveying pipeline (4), a valve (11) installed on the air supplementing channel (10) for controlling the opening and closing state of the air supplementing channel (10), a pressure sensor (12) for detecting the internal pressure of the conveying pipeline (4), and a controller (13) connected with the pressure sensor (12) and the valve (11) for receiving and processing the pressure signal detected by the pressure sensor (12) to control the opening and closing state of the valve (11) according to preset conditions.

2. A pneumatic powder conveying line arrangement according to claim 1, characterized in that: The device further comprises a flow regulator (14) arranged in the air supplementing channel (10), which is connected with the controller (13) for fine adjustment of the air supplementing amount.

3. A pneumatic powder conveying line arrangement according to claim 2, characterized in that: The installation positions of the plurality of air supplementing devices (8) include the elbow and the variable diameter of the conveying pipeline (4).

4. A pneumatic powder conveying line arrangement according to claim 3, characterized in that: The air supplementing channel (10) of the air supplementing device (8) located at the elbow of the conveying pipeline (4) is provided with a shunt branch (15) installed at the air outlet end of the air supplementing channel (10) for discharging the powder particles blocked at the elbow of the conveying pipeline (4), and the gas flow direction in the shunt branch (15) is the same as the powder flow direction in the conveying pipeline (4).

5. A pneumatic powder conveying line arrangement according to claim 4, characterized in that: The shunt branch (15) and the air outlet end of the air supplementing channel (10) are both provided with a filter screen (16).

6. The pneumatic powder conveying line structure according to claim 1, characterized in that: The air supply assembly (9) comprises a compressor (17) for providing high-pressure air and an air tank (18) connected with the compressor (17) for storing compressed air.

7. A pneumatic powder conveying pipeline arrangement according to any one of claims 1-6, characterized in that: The device further comprises a safety device for automatically cutting off the power source (1) or the air supplementing device (8) when the internal pressure of the conveying pipeline (4) abnormally rises or falls.

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