A pneumatic conveying device for silica gel desiccant production

Abstract

This utility model discloses a pneumatic conveying device for silica gel desiccant production, including a conveying pipeline, an air distribution mechanism, and a separating cylinder. A feed hopper is connected to the conveying pipeline, and an electromagnetic valve is installed at the discharge end of the feed hopper. The air distribution mechanism is installed on the conveying pipeline and includes a compressed air source, a regulating valve, and an air delivery pipe. The compressed air source is connected to the regulating valve, and the air delivery pipe is connected to the regulating valve. The air outlet of the air delivery pipe is located inside the conveying pipeline. An air outlet pipe is provided at the top of the separating cylinder, and one end of the air outlet pipe is connected to a negative pressure fan. The separating cylinder is connected to the conveying pipeline. This utility model, by setting up an air distribution mechanism, effectively solves the problems of silica gel desiccant particles easily clogging at the corners of the conveying pipeline during transportation, as well as the wear and tear at the corners of the conveying pipeline. This ensures the continuity of silica gel desiccant particle transportation, reduces downtime caused by pipeline blockage, and improves production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of silica gel desiccant production, and in particular to a pneumatic conveying device for silica gel desiccant production. Background Technology

[0002] Silica gel desiccant is made from sodium silicate and sulfuric acid through a synthesis reaction to form silica gel, which is then produced through processes such as aging, acid soaking, washing, drying, and packaging. Due to its non-toxicity, chemical inertness, high specific surface area, and high water absorption, it is widely used for moisture protection in food packaging, pharmaceuticals, electronic instruments, and shipping containers; for mildew prevention of leather and textiles; and for protecting cultural relics and archives from fading and deformation.

[0003] In the production of silica gel desiccant, the conveying of the dried granular material is a crucial step. Traditional conveying methods mainly use belt conveyors, but belt conveyors have some obvious drawbacks: during belt conveying, the gap between the belt and the material, as well as belt wear, can easily lead to material leakage and defective products; belt conveyors also have certain limitations in terms of conveying distance and lifting height, making it difficult to meet the needs of complex production lines.

[0004] Pneumatic conveying devices are widely used in the conveying of silica gel desiccant materials due to their advantages such as high conveying efficiency, small footprint, and ease of automation. Their core principle is to use gas power (usually negative or positive pressure) to propel the material through the pipeline, thus completing the material transfer.

[0005] However, existing pneumatic conveying devices still have significant shortcomings in conveying silica gel desiccant granules. Silica gel desiccant granules have a certain degree of hardness, which easily causes friction with the inner wall of the pipe during conveying, leading to pipe wear. At the same time, unstable airflow can cause unstable conveying, resulting in silica gel desiccant clogging at the corners of the conveying pipe, requiring manual shutdown for clearing, which seriously affects the continuity of production. Summary of the Invention

[0006] In view of this, the purpose of this utility model is to propose a pneumatic conveying device for the production of silica gel desiccant, so as to solve the problem of silica gel desiccant particles clogging at the corners of the conveying pipe.

[0007] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0008] A pneumatic conveying device for silica gel desiccant production includes a conveying pipeline, an air distribution mechanism, and a separating cylinder. A feed hopper is connected to the conveying pipeline, and an electromagnetic valve is installed at the discharge end of the feed hopper. The air distribution mechanism is located on the conveying pipeline and includes a compressed air source, a regulating valve, and an air supply pipe. The compressed air source is connected to the regulating valve, and the air supply pipe is connected to the regulating valve. The air outlet of the air supply pipe is located inside the conveying pipeline. An air outlet pipe is provided at the top of the separating cylinder, and a negative pressure fan is connected to one end of the air outlet pipe. The separating cylinder is connected to the conveying pipeline.

[0009] Preferably, the system further includes a control module, which includes a sensor and a control panel. The sensor is disposed inside the material conveying pipe, and the control panel is electrically connected to the sensor, the compressed air source, the solenoid valve, and the negative pressure fan.

[0010] Preferably, the bottom of both the feed hopper and the separator is funnel-shaped.

[0011] Preferably, the power unit of the compressed air source is a servo motor.

[0012] Preferably, a filter screen is provided at the other end of the air outlet pipe.

[0013] Preferably, the bottom of the separation cylinder is provided with multiple support rods.

[0014] The advantages of the above technical solution, which differ from existing technologies, are as follows:

[0015] This invention features a conveying pipe, a feeding hopper, and an electromagnetic valve, enabling the orderly conveying and control of silica gel desiccant granules. This reduces the accumulation and blockage of the conveying pipes, and minimizes wear and tear on the conveying system. The air distribution mechanism effectively solves the problem of silica gel desiccant granules easily wearing down and clogging the conveying pipes during transport, ensuring continuous transport, reducing downtime caused by pipe blockages, and improving production efficiency. The combination of the separator and negative pressure fan achieves efficient separation of silica gel desiccant granules from the airflow, ensuring effective granule collection and reducing waste caused by granule loss. The control module reduces manual intervention, improving efficiency and enabling timely responses to pipe blockages and wear, ensuring continuous and stable production and reducing the risk of production failures due to human error. Attached Figure Description

[0016] 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the air distribution mechanism described in this embodiment being installed on the material conveying pipeline;

[0018] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0019] Figure 3 This is a schematic diagram of the separation cylinder described in this embodiment.

[0020] The reference numerals used in the above figures are explained as follows:

[0021] 1. Material conveying pipeline; 11. Feed hopper; 12. Solenoid valve; 2. Air distribution mechanism; 21. Compressed air source; 22. Regulating valve; 23. Air supply pipe; 231. Main pipe; 232. Branch pipe; 24. Air duct; 3. Separator cylinder; 31. Air outlet pipe; 311. Filter screen; 32. Support rod; 4. Control module; 41. Sensor. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are only for illustrating the present invention and do not limit the scope of the present invention. Similarly, the following embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0023] Please see Figures 1 to 3 This embodiment provides a pneumatic conveying device for silica gel desiccant production, including a conveying pipe 1, an air distribution mechanism 2, and a separating cylinder 3. The conveying pipe 1 is connected to a feed hopper 11, and the discharge end of the feed hopper 11 is equipped with an electromagnetic valve 12. The air distribution mechanism 2 is disposed on the conveying pipe 1 and includes a compressed air source 21, a regulating valve 22, and an air supply pipe 23. The compressed air source 21 is connected to the regulating valve 22, and the air supply pipe 23 is connected to the regulating valve 22. The air outlet of the air supply pipe 23 is located inside the conveying pipe 1. The top of the separating cylinder 3 is provided with an air outlet pipe 31, one end of which is connected to a negative pressure fan. The separating cylinder 3 is connected to the conveying pipe 1.

[0024] The conveying pipe 1 is a hollow tubular structure for conveying silica gel desiccant granules, made of high-strength stainless steel. The feed hopper 11 is made of the same material as the conveying pipe 1 and is connected to it. The top of the feed hopper 11 is open to facilitate the entry of silica gel desiccant granules, and the bottom is connected to the flange of the conveying pipe 1. A solenoid valve 12 is installed at the outlet end of the feed hopper 11 to control the flow rate of silica gel desiccant granules entering the conveying pipe 1.

[0025] Specifically, after the dried silica gel desiccant particles flow into the feed hopper 11, the discharge amount of silica gel desiccant particles in the feed hopper 11 is adjusted in real time according to the flow rate of silica gel desiccant particles in the conveying pipe 1 to avoid accumulation and blockage in the conveying pipe 1 due to excessive silica gel desiccant particles.

[0026] The air distribution mechanism 2 is used to unclog the pipeline. In this embodiment, two air distribution mechanisms 2 are provided, both located at the corner of the conveying pipeline 1. They disperse the silica gel desiccant particles accumulated in the conveying pipeline 1, thereby unclogging the pipeline. The compressed air source 21 is an air compressor used to supply compressed air to the air delivery pipe 23. The regulating valve 22 is connected to the compressed air source 21 through the air duct 24. The regulating valve 22 is used to regulate the amount of compressed air flowing into the air delivery pipe 23 to control the intensity of the compressed air sprayed from the air delivery pipe 23, ensuring that the conveying pipeline is unclogged without damaging the silica gel desiccant particles. The air delivery pipe 23 is made of high-strength stainless steel. Both air delivery pipes 23 are supplied with compressed air from the same compressed air source 21. The air delivery pipe 23 consists of a main pipe 231 and multiple branch pipes 232. The main pipe 231 is directly connected to the regulating valve 22, and the branch pipes 232 are connected to the main pipe 231. Multiple branch pipes 232 pass through the outer wall of the conveying pipe 1 and are connected to the conveying pipe 1. The air outlet of the branch pipe 232 is flush with the inner wall of the conveying pipe 1, and a filter screen is installed at the air outlet of the branch pipe 232 to avoid interfering with the transport of silica gel desiccant particles and to prevent silica gel desiccant particles from falling into the air conveying pipe 23.

[0027] Specifically, when the compressed air source 21 is activated and the regulating valve 22 is opened, compressed air enters the air delivery pipe 23 and is ejected at high speed from the branch pipe 232 of the air delivery pipe 23 to disperse the silica gel desiccant particles accumulated at the corner of the material delivery pipe 1, ensuring the smooth flow of the material delivery pipe 1.

[0028] The separator 3 is used to separate silica gel desiccant particles from the conveying airflow. The air outlet 31 at the top of the separator 3 is connected to a negative pressure fan to generate negative pressure in the conveying pipeline. This causes the silica gel desiccant particles to enter the separator 3 along the tangential direction under the influence of the airflow. Under the action of their own gravity and centrifugal force, the silica gel desiccant particles separate from the conveying airflow and flow into the storage bin from the outlet at the bottom of the separator 3.

[0029] Specifically, during operation, the negative pressure fan is first started to create a negative pressure environment in the conveying pipe 1 and the separation cylinder 3. The solenoid valve 12 at the discharge end of the feed hopper 11 is opened, and the silica gel desiccant particles enter the conveying pipe 1 under negative pressure, moving towards the separation cylinder 3 with the airflow. During the conveying process, if the silica gel desiccant material accumulates at the bend in the conveying pipe 1 due to excessive density or other reasons, causing blockage, the compressed air source 21 is started, and the regulating valve 22 is adjusted to allow compressed air to be rapidly ejected from the branch pipe 232 through the air delivery pipe 23. This agitates the silica gel desiccant particles accumulated on the inner wall of the pipe, dispersing and breaking up the blocked particles, allowing them to continue to be conveyed with the airflow. After entering the separation cylinder 3, due to the change in airflow direction and gravity, the silica gel desiccant particles gradually separate from the airflow. The silica gel desiccant particles settle to the bottom of the separation cylinder 3, while the airflow is discharged through the top outlet pipe 31.

[0030] Meanwhile, if there is no blockage in the conveying pipe 1, the air distribution mechanism 2 can also operate. The air distribution mechanism 2 generates positive pressure, which, together with the negative pressure generated by the negative pressure fan, drives the silica gel desiccant particles to be conveyed in the conveying pipe 1, thereby improving the conveying efficiency.

[0031] In this embodiment, the power unit used in the air compressor is a servo motor. The servo motor has good speed regulation performance, position control accuracy and fast response characteristics, and can stably compress external air to ensure the pressure consistency of the compressed air.

[0032] In some embodiments, the air compressor is powered by a stepper motor.

[0033] Compared with the prior art, this embodiment sets up a conveying pipe 1, a feeding hopper 11, and a solenoid valve 12, realizing the orderly conveying and dispensing control of silica gel desiccant material, and reducing the accumulation and blockage of silica gel desiccant particles in the conveying pipe 1 to a certain extent; the setting of the air distribution mechanism 2 effectively solves the problem that silica gel desiccant particles are easily blocked at the corner of the conveying pipe 1 during the conveying process, ensuring the continuity of the conveying process, reducing downtime caused by pipe blockage, and improving production efficiency; the cooperation between the separation cylinder 3 and the negative pressure fan realizes the efficient separation of silica gel desiccant particles and airflow, ensuring the collection effect of silica gel desiccant particles and reducing the waste caused by the loss of silica gel desiccant particles with the airflow.

[0034] Please see Figure 1In this embodiment, a control module 4 is also included. The control module 4 includes a sensor 41 and a control panel. The sensor 41 is disposed inside the conveying pipe 1. The control panel is electrically connected to the sensor 41, the compressed air source 21, the solenoid valve 12, and the negative pressure fan. There are multiple sensors 41, all disposed on the inner wall of the conveying pipe 1, for real-time monitoring of the conveying status of silica gel desiccant particles in the conveying pipe 1.

[0035] Specifically, sensor 41 is a flow sensor. When silica gel desiccant particles become clogged in the conveying pipe 1, the flow rate of the silica gel desiccant particles in the conveying pipe 1 will change. The flow sensor 41 can sense the change in the flow rate of the silica gel desiccant particles in real time and transmit the signal to the control panel. After receiving the signal, the control panel analyzes and judges it through its internal program. If it determines that there is a blockage, it will automatically issue a command. On the one hand, it starts the compressed air source 21 to make the air distribution mechanism 2 work to clear the blockage. On the other hand, it adjusts the opening of the solenoid valve 12 according to the actual situation to control the speed at which the silica gel desiccant particles enter the conveying pipe 1, so as to prevent the blockage from worsening. At the same time, it adjusts the power of the negative pressure fan to change the airflow intensity in the conveying pipe 1 to assist in clearing and conveying the silica gel desiccant particles.

[0036] The inclusion of control module 4 significantly enhances the intelligence of the device. Sensor 41 monitors the real-time conveying status of the silica gel desiccant particles, enabling precise control over the device's operation. The control panel automatically controls the operation of each component based on feedback from sensor 41, reducing manual intervention. This not only improves work efficiency but also allows for timely responses to abnormal situations such as pipe blockages, ensuring production continuity and stability and mitigating the risk of production failures due to human error.

[0037] Please see Figure 1 and Figure 3 In this embodiment, both the bottom of the feed hopper 11 and the separator 3 are funnel-shaped. The funnel-shaped structure at the bottom of the feed hopper 11 guides the silica gel desiccant particles smoothly towards the discharge end, facilitating their entry into the conveying pipe 1 through the solenoid valve 12 at the discharge end. The funnel-shaped structure at the bottom of the separator 3 guides the silica gel desiccant particles to gather towards the center of the bottom of the separator 3 after they separate from the airflow, facilitating their collection and discharge.

[0038] Specifically, during the feeding process, after the silica gel desiccant particles are poured into the feed hopper 11, due to the funnel-shaped structure at the bottom of the feed hopper 11, the silica gel desiccant particles will naturally flow towards the discharge end. Under the action of gravity, the silica gel desiccant particles can more smoothly pass through the solenoid valve 12 into the conveying pipe 1, reducing the residue of silica gel desiccant particles in the feed hopper 11. In the separator 3, after the silica gel desiccant particles are separated from the airflow, the silica gel desiccant particles fall under the action of gravity. The funnel-shaped bottom causes the silica gel desiccant particles to converge towards the bottom center along the inclined cylinder wall, and finally concentrate near the discharge port, making it convenient to discharge the silica gel desiccant particles from the separator 3 through the discharge port of the separator 3.

[0039] Please see Figure 3 In this embodiment, a filter screen 311 is provided at the other end of the air outlet pipe 31. The other end of the air outlet pipe 31 is the end furthest from the negative pressure fan. The filter screen 311 is made of stainless steel, and the mesh size is selected according to the actual size of the silica gel desiccant particles being transported. Its purpose is to prevent silica gel desiccant particles from entering the negative pressure fan with the airflow through the air outlet pipe 31, thus protecting the fan. Specifically, during device operation, the airflow discharged from the separator 3 may carry a small amount of incompletely separated silica gel desiccant particles. When the airflow passes through the air outlet pipe 31, the airflow can pass smoothly through the mesh of the filter screen 311, while the silica gel desiccant particles, being larger than the mesh size, are blocked by the filter screen 311, thereby preventing the silica gel desiccant particles from entering the negative pressure fan.

[0040] The 311 filter effectively protects the negative pressure fan, preventing silica gel desiccant particles from causing wear and blockage to the fan blades and other components, extending the service life of the negative pressure fan, and reducing equipment maintenance and replacement costs.

[0041] Please see Figure 3In this embodiment, the bottom of the separation cylinder 3 is provided with multiple support rods 32. The support rods 32 are made of metal, such as carbon steel or stainless steel. The number of support rods 32 is determined according to the size and weight of the separation cylinder 3; preferably, there are three support rods 32, evenly distributed at the bottom of the separation cylinder 3. One end of each support rod 32 is fixedly connected to the bottom of the separation cylinder 3, while the other end is supported on the ground or equipment mounting platform, providing stable support for the separation cylinder 3. Specifically, during device operation, the separation cylinder 3 needs to withstand its own weight as well as the forces from the internal silica gel desiccant particles and airflow. The support rods 32 maintain the stability of the separation cylinder 3 by evenly transferring the weight and forces of the separation cylinder 3 to the ground or mounting platform. The even distribution of multiple support rods 32 at the bottom of the separation cylinder 3 ensures effective support in all directions, preventing the separation cylinder 3 from tilting or shaking due to uneven force distribution. The support rod 32 ensures the stability of the separator 3 during operation, preventing the separation effect of silica gel desiccant particles and airflow from being affected by the shaking of the separator 3, as well as potential equipment damage and safety hazards.

[0042] Compared with existing technologies, this utility model, with its conveying pipe 1, feeding hopper 11, and solenoid valve 12, achieves orderly conveying and dispensing control of silica gel desiccant materials, reducing the accumulation and blockage of silica gel desiccant particles in the conveying pipe 1 to a certain extent. The air distribution mechanism 2 effectively solves the problem of silica gel desiccant particles easily clogging at the corners of the conveying pipe 1 during transport, ensuring the continuity of the conveying process, reducing downtime caused by pipe blockage, and improving production efficiency. The combination of the separator 3 and the negative pressure fan achieves efficient separation of silica gel desiccant particles from the airflow, ensuring the effective collection of silica gel desiccant particles and reducing waste caused by particles being lost with the airflow. The control module 4 reduces manual intervention, not only improving work efficiency but also enabling timely response to abnormal situations such as pipe blockage, ensuring the continuity and stability of production, and reducing the risk of production failures due to human error.

[0043] The above description is only a part of the embodiments of this utility model, and does not limit the scope of protection of this utility model. Any equivalent device or equivalent process transformation made based on the content of this utility model specification and drawings, or direct or indirect application in other related technical fields, are similarly included in the patent protection scope of this utility model.

Claims

1. A pneumatic conveying device for silica gel desiccant production, characterized in that, include: A material conveying pipeline, wherein a feeding hopper is connected to the material conveying pipeline, and an electromagnetic valve is provided at the discharge end of the feeding hopper; An air distribution mechanism is provided on the material conveying pipeline. The air distribution mechanism includes a compressed air source, a regulating valve, and an air conveying pipe. The compressed air source is connected to the regulating valve, and the air conveying pipe is connected to the regulating valve. The air outlet of the air conveying pipe is located inside the material conveying pipeline. The separation cylinder has an air outlet pipe at its top, one end of which is connected to a negative pressure fan. The separation cylinder is connected to the material conveying pipeline.

2. The pneumatic conveying device for silica gel desiccant production according to claim 1, characterized in that, It also includes a control module, which includes a sensor and a control panel. The sensor is located inside the material conveying pipe, and the control panel is electrically connected to the sensor, the compressed air source, the solenoid valve, and the negative pressure fan.

3. The pneumatic conveying device for silica gel desiccant production of claim 1, characterized in that, The bottoms of both the feed hopper and the separator are funnel-shaped.

4. The pneumatic conveying device for silica gel desiccant production of claim 1, wherein, The power source for the compressed air is a servo motor.

5. A pneumatic conveying device for silica gel desiccant production according to claim 1, characterized in that, A filter screen is installed at the other end of the air outlet pipe.

6. The pneumatic conveying device for silica gel desiccant production of claim 1, wherein, The bottom of the separation cylinder is provided with multiple support rods.

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