A novel negative pressure delivery system

Abstract

The utility model provides a novel negative pressure conveying system, including feed hopper, vacuum feeding machine and negative pressure fan, and feed hopper and vacuum feeding machine are connected through material conveying pipeline between, and vacuum feeding machine and negative pressure fan are connected through gas supply pipeline between, along the direction of conveyance, and the air supplementing valve and the broken empty valve are set gradually on material conveying pipeline. This novel negative pressure conveying system installs the broken empty valve in material conveying pipeline, can effectively reduce the material accumulation in material conveying pipeline in the process of unloading.

Description

Technical Field

[0001] This utility model relates to a powder conveying system, specifically, a novel negative pressure conveying system. Background Technology

[0002] Negative pressure pneumatic conveying systems utilize a blower (vacuum pump) to generate negative pressure, pumping powdered or granular materials, uniformly mixed with air at the receiving unit, through pipelines to a storage device. Currently, many related negative pressure powder conveying systems are available on the market. For example, Chinese patent CN118341329A discloses a large silo powder negative pressure homogenization device, which mainly includes a silo, a vacuum feeder, and a filter. The pipeline is equipped with a material-to-air ratio valve, a venting valve, a venting valve, and a dust removal valve. However, this design installs the venting valve on the gas pipeline between the vacuum feeder and the negative pressure blower. This causes a large amount of material to accumulate in the material conveying pipeline between the vacuum feeder and the silo during venting, leading to a significant increase in pressure during the next conveying operation, sometimes exceeding the blower's maximum pressure, ultimately causing pipe blockage. To ensure stable system operation, higher-power, higher-vacuum blowers are currently selected as the power source, but this significantly increases system costs. In addition, static electricity generated during material conveying can cause materials to adhere to the discharge valve of the vacuum feeder, which can easily lead to the discharge valve not closing tightly and system leakage.

[0003] In order to solve the above problems, people have been seeking an ideal technological solution. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a novel negative pressure conveying system.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A novel negative pressure conveying system includes a feeding hopper, a vacuum feeder, and a negative pressure fan. The feeding hopper and the vacuum feeder are connected by a material conveying pipeline, and the vacuum feeder and the negative pressure fan are connected by an air source pipeline. Along the conveying direction, an air replenishment valve and a venting valve are sequentially installed on the material conveying pipeline.

[0007] The material conveying pipeline has a Z-shaped structure. The horizontal height of the vacuum feeder is higher than that of the feed hopper. The air replenishment valve is located near the feed hopper and in the horizontal section of the material conveying pipeline. The air breaker valve is located in the vertical section of the material conveying pipeline.

[0008] The vacuum feeder has a discharge port on its lower side, which is connected to a hopper. The discharge port is equipped with a discharge valve, which includes a rotating cylinder, a valve stem, a valve plate connected to the valve stem, and an electrostatic grounding plate. The valve plate is positioned corresponding to the discharge port, and the rotating cylinder is used to drive the valve stem to rotate. The electrostatic grounding plate is grounded through a wire.

[0009] The feed hopper is a cone-shaped hopper that is wider at the top and narrower at the bottom. The bottom of the feed hopper is equipped with a discharge pipe, which is connected to the material conveying pipeline.

[0010] The side of the hopper is equipped with a hopper support, the bottom of the hopper support is equipped with a traveling wheel and a positioning foot, the upper side of the positioning foot is equipped with a threaded post, and the hopper support is equipped with a corresponding threaded hole, and the threaded post is threadedly connected to the threaded hole.

[0011] Compared to existing technologies, the advantages of this invention are as follows: This invention provides a novel negative pressure conveying system that installs a venting valve in the material conveying pipeline, which can effectively reduce material accumulation in the pipeline during unloading. This allows the pressure to remain stable at a lower value during the next feeding cycle, enabling the selection of a blower with lower power and vacuum as the power source, thereby reducing equipment costs. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the feeding valve in this utility model.

[0014] Figure 3 This is the system control logic diagram of this utility model.

[0015] In the diagram: 1. Negative pressure fan; 2. Air source pipeline; 3. Vacuum feeder; 4. Material conveying pipeline; 5. Air rupture valve; 6. Air replenishment valve; 7. Feed hopper; 8. Discharge valve; 9. Rotary cylinder; 10. Static grounding plate; 11. Valve stem; 12. Valve plate; 13. Hopper support. Detailed Implementation

[0016] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. "Installed," "equipped with," and "connected" can employ conventional means in the prior art, such as integral installation, snap-fit ​​installation, welding connection, adhesive connection, bolted connection, etc. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances and select suitable connection, setting, or installation methods from the existing technology.

[0018] like Figure 1-3 As shown, a novel negative pressure conveying system includes a feeding hopper 7, a vacuum feeder 3, and a negative pressure fan 1. The feeding hopper 7 and the vacuum feeder 3 are connected via a material conveying pipeline 4, and the vacuum feeder 3 and the negative pressure fan 1 are connected via an air source pipeline 2. Along the conveying direction, an air replenishment valve 6 and a venting valve 5 are sequentially installed on the material conveying pipeline 4. It should be noted that, for ease of use, this novel negative pressure conveying system can be equipped with a corresponding control system to control the operation of the vacuum feeder, the negative pressure fan, and the various valves. The system control logic is described in [reference needed]. Figure 3 The specific control components and control circuits can all be based on existing technologies, and will not be elaborated further.

[0019] The specific usage process is as follows: First, during normal conveying, ensure that the venting valve 5 and the discharge valve 8 are closed, and the air replenishment valve 6 is open; then start the negative pressure fan 1 to draw the material from the feed hopper 7 into the material conveying pipeline 4 and the vacuum feeder 3. When the vacuum feeder 3 is full of material, open the venting valve 5 to cut off the feed hopper 7, preventing the material in the hopper 7 from entering the material conveying pipeline 4. At the same time, draw all the remaining material in the material conveying pipeline 4 into the vacuum feeder 3. At this time, there is no material accumulation in the material conveying pipeline 4, and it is in an empty pipe state; then open the discharge valve 8 to unload the material into the storage tank below. After unloading is completed, close the discharge valve 8 and the venting valve 5 in sequence, and then enter the next feeding cycle. As described above, by changing the position of the venting valve and installing it on the material conveying pipe 4 near the feed hopper 7, and adding an air replenishment valve 6 to the material conveying pipe 4, the vacuum feeder 3 can prevent material from accumulating in the material conveying pipe 4 during the unloading process. This allows the pressure to remain stable at a lower value during the next feeding cycle, thus enabling the selection of a blower with lower power and vacuum as the power source, thereby reducing costs.

[0020] In one embodiment, the material conveying pipe 4 has a Z-shaped structure, the horizontal height of the vacuum feeder 3 is higher than that of the feed hopper 7, the air replenishment valve 6 is located near the feed hopper 7 and in the horizontal section of the material conveying pipe 4, and the air breaker valve 5 is located in the vertical section of the material conveying pipe 4 to reduce material accumulation in the material conveying pipe.

[0021] In one embodiment, the vacuum feeder 3 has a discharge port on its lower side, which is connected to a hopper. The discharge port is equipped with a discharge valve 8, which includes a rotary cylinder 9, a valve stem 11, a valve plate 12 connected to the valve stem 11, and an electrostatic grounding plate 10. The valve plate 12 is positioned corresponding to the discharge port, and the rotary cylinder 9 drives the valve stem 11 to rotate. The electrostatic grounding plate 10 is grounded via a wire. In actual use, external compressed gas drives the rotary cylinder, which in turn drives the valve stem to rotate. The valve stem then drives the valve plate to rotate, thereby achieving the opening and closing of the valve. An electrostatic grounding plate is welded to the valve stem, and an external wire connected to the electrostatic grounding plate conducts static electricity to the ground, preventing static electricity from affecting the discharge process.

[0022] In one embodiment, the feeding hopper 7 is a conical hopper that is wider at the top and narrower at the bottom. The bottom of the feeding hopper 7 is provided with a discharge pipe, which is connected to the material conveying pipe 4 for convenient feeding.

[0023] In one embodiment, a hopper support 13 is provided on the side of the hopper 7. The bottom of the hopper support 13 is provided with wheels and positioning feet. The wheels facilitate moving the hopper, and the positioning feet facilitate positioning the hopper. A threaded post is provided on the upper side of the positioning feet, and a corresponding threaded hole is provided on the hopper support 13. The threaded post and the threaded hole are threadedly connected. During the movement of the hopper, the positioning feet maintain a distance from the ground for easy pushing. After moving to a suitable position, the positioning feet are rotated to make them contact the ground, preventing them from moving arbitrarily. Preferably, a locking nut can also be provided on the threaded post to prevent the positioning feet from slipping.

[0024] The above embodiments can be combined with each other.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A novel negative pressure conveying system, characterized in that: It includes a feeding hopper, a vacuum feeder, and a negative pressure fan. The feeding hopper and the vacuum feeder are connected by a material conveying pipeline, and the vacuum feeder and the negative pressure fan are connected by an air source pipeline. Along the conveying direction, an air replenishment valve and an air breaking valve are installed sequentially on the material conveying pipeline.

2. The novel negative pressure conveying system according to claim 1, characterized in that: The material conveying pipeline has a Z-shaped structure. The horizontal height of the vacuum feeder is higher than that of the feed hopper. The air replenishment valve is located near the feed hopper and in the horizontal section of the material conveying pipeline. The air breaker valve is located in the vertical section of the material conveying pipeline.

3. The novel negative pressure conveying system according to claim 2, characterized in that: The vacuum feeder has a discharge port on its lower side, which is connected to a hopper. The discharge port is equipped with a discharge valve, which includes a rotating cylinder, a valve stem, a valve plate connected to the valve stem, and an electrostatic grounding plate. The valve plate is positioned corresponding to the discharge port, and the rotating cylinder is used to drive the valve stem to rotate. The electrostatic grounding plate is grounded through a wire.

4. The novel negative pressure conveying system according to claim 3, characterized in that: The feed hopper is a cone-shaped hopper that is wider at the top and narrower at the bottom. The bottom of the feed hopper is equipped with a discharge pipe, which is connected to the material conveying pipeline.

5. The novel negative pressure conveying system according to claim 4, characterized in that: The side of the hopper is equipped with a hopper support, the bottom of the hopper support is equipped with a traveling wheel and a positioning foot, the upper side of the positioning foot is equipped with a threaded post, and the hopper support is equipped with a corresponding threaded hole, and the threaded post is threadedly connected to the threaded hole.

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