A negative pressure raw material conveying mechanism

Abstract

This utility model discloses a negative pressure raw material conveying mechanism, belonging to the field of raw material conveying technology. It includes: a feeding machine, a high-concentration conveyor, and storage bins. The feeding machine includes a negative pressure conveyor and a discharge hopper. The negative pressure conveyor is connected to the discharge hopper, and raw materials are fed into the hopper and conveyed by drawing negative pressure through the negative pressure conveyor. The high-concentration conveyor is connected to the discharge hopper via a pipeline. The storage bins are connected to the outlet of the high-concentration conveyor via a conveying pipeline. There are several storage bins, and the conveying pipeline is divided into several branches, each corresponding to a storage bin. Diversion valves are installed at the branch forks to control the direction of raw material conveying, ensuring it is stored in the designated storage bin. This utility model uses a negative pressure conveying method, preventing dust leakage, protecting the production environment, and ensuring product quality. The diversion valves direct different types of raw materials to designated storage bins. The system control of the conveying path is highly intelligent.

Description

Technical Field

[0001] This utility model relates to the field of raw material conveying technology, specifically to a negative pressure raw material conveying mechanism. Background Technology

[0002] In the chemical production field, especially in the processing of chlorinated polyvinyl chloride (CPVC), various grades or batches of raw materials need to be accurately and efficiently transported to the corresponding storage or reaction equipment. CPVC raw materials are usually in powder form and have characteristics such as easy moisture absorption, easy static electricity aggregation, and high requirements for cleanliness.

[0003] Currently, common powder conveying methods include positive pressure pneumatic conveying and mechanical conveying. While positive pressure pneumatic conveying can cover long distances, it carries the risk of oil and water vapor contaminating raw materials, and dust leaks are prone to occur at equipment interfaces and pipe seals, polluting the environment. Mechanical conveying (such as screw conveyors), on the other hand, has disadvantages such as complex equipment structure, large space occupation, difficulty in achieving multi-point feeding, and the potential for cross-contamination between different raw materials.

[0004] Especially in situations where multiple CPVC raw materials need to be transported to several designated storage bins, existing technologies typically employ either a separate conveying system for each bin or a complex multi-path mechanical distributor. The former results in high equipment investment costs, large footprint, and significant energy consumption; the latter requires tedious pipeline cleaning when switching raw materials, otherwise serious mixing problems will occur, affecting the quality of the final product, and the cleaning process will also lead to raw material waste and reduced production efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide a negative pressure raw material conveying mechanism to solve the above problems and realize the flexible, clean, efficient and cross-contamination-free fixed-point conveying of various raw materials.

[0006] Technical Solution: This utility model provides a negative pressure raw material conveying mechanism, including: a feeder, a high-concentration conveyor, and a storage tank. The feeder includes a negative pressure conveyor and a discharge hopper. The negative pressure conveyor is connected to the discharge hopper, from which raw materials are fed. The high-concentration conveyor is connected to the discharge hopper via a pipeline. The storage tank is connected to the outlet of the high-concentration conveyor via a conveying pipeline. There are several storage tanks, and the conveying pipeline is divided into several branches, each corresponding to a storage tank. Diversion valves are installed at the branch forks to control the direction of raw material conveying, ensuring that it is stored in a designated storage tank. The storage tank is equipped with a separation filter plate and a vacuum suction port, and a vacuum pump is installed on the ground and connected to the vacuum suction port.

[0007] Furthermore, in the aforementioned negative pressure raw material conveying mechanism, a first valve is installed on the pipeline at the inlet of the high-concentration conveyor.

[0008] Furthermore, in the aforementioned negative pressure raw material conveying mechanism, a second valve is provided on the conveying pipe at the outlet of the high-concentration conveyor.

[0009] Furthermore, in the aforementioned negative pressure raw material conveying mechanism, there are four storage bins, divided into two groups, each storing different raw materials.

[0010] Furthermore, in the aforementioned negative pressure raw material conveying mechanism, the storage hopper contains raw material H727 and raw material H829.

[0011] Furthermore, in the aforementioned negative pressure raw material conveying mechanism, the branch includes a first branch and a second branch, and the diversion valve has a three-way structure, with the inlet end connected to the conveying pipe and the two ends connected to the first branch and the second branch respectively.

[0012] Furthermore, in the aforementioned negative pressure raw material conveying mechanism, the first branch and the second branch each correspond to a set of storage tanks, and the first branch and the second branch are equipped with diversion valves to split the first branch and the second branch into two branches, which are connected to the corresponding storage tanks.

[0013] Furthermore, the aforementioned negative pressure raw material conveying mechanism also includes a central control system, which controls the start and stop of the feeder, as well as the first valve, the second valve, and the diversion valve, to select the raw material conveying path.

[0014] As can be seen from the above technical solution, this utility model has the following beneficial effects: The negative pressure raw material conveying mechanism of this utility model adopts a negative pressure conveying method, and the entire conveying process is completed inside the pipeline, which effectively prevents dust leakage and protects the production environment. At the same time, the system is isolated from the outside world, eliminating the contamination of high-purity CPVC raw materials by moisture and oil in compressed air, and ensuring the quality of the final product; by setting a precisely controllable diversion valve on the conveying pipeline, different types of raw materials can be directionally conveyed to designated storage bins simply by switching the valve; the structure is compact, reducing the need for redundant conveying equipment and the corresponding floor space, saving cost investment; through the control of the central control system, the automatic selection of raw material conveying path can be realized, with a high degree of intelligence. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a negative pressure raw material conveying mechanism according to the present invention.

[0016] In the diagram: 1. Feeder; 2. High-concentration conveyor; 3. Storage tank; 11. Negative pressure conveyor; 12. Discharge hopper; 21. First valve; 22. Second valve; 31. Conveying pipe; 32. Diverter valve; 311. First branch; 312. Detailed Implementation

[0017] Example 1 like Figure 1 The illustrated negative pressure raw material conveying mechanism includes: a feeder 1, a high-concentration conveyor 2, and a storage tank 3. The feeder 1 includes a negative pressure conveyor 11 and a discharge hopper 12. The negative pressure conveyor 11 is connected to the discharge hopper 12, and raw materials are fed into the discharge hopper 12. The negative pressure conveyor 11 draws negative pressure to convey the raw materials. The high-concentration conveyor 2 is connected to the discharge hopper 12 through a pipeline. The high-concentration conveyor 2 is a powder feeder that mixes air and powder to form a high-concentration powder flow. The storage tank 3 is connected to the outlet of the high-concentration conveyor 2 through a conveying pipeline 31. There are several storage tanks 3. The conveying pipeline 31 is divided into several branches, which are respectively connected to each storage tank 3. A diversion valve 32 is set at the branch fork to control the direction of raw material conveying and store it into the designated storage tank 3. The storage tank 3 is equipped with a separation filter plate and a vacuum suction port, and a vacuum pump is installed on the ground and connected to the vacuum suction port. The operator pours CPVC raw material into the feeding port of the hopper 12 and starts the negative pressure conveyor 11 and vacuum pump, which generate a stable negative pressure in the entire conveying pipeline. Under the action of negative pressure, the raw material is drawn from the hopper 12 through the pipeline to the high-concentration conveyor 2. The high-concentration conveyor 2 can temporarily store, buffer, or measure the volume / weight of the raw material. During material conveying, according to the preset target, the diversion valve 32 on the corresponding storage tank 3 branch is opened, while the valves of other branches are closed. Under the action of negative pressure, the raw material is accurately conveyed through the conveying pipeline 31 to the designated storage tank 3 with the diversion valve 32 already opened, completing one conveying operation. If it is necessary to send a different type of raw material to another storage tank 3, simply switch the different branches of the diversion valve 32.

[0018] In this embodiment, a first valve 21 is installed on the pipeline at the inlet of the high-concentration conveyor 2; a second valve 22 is installed on the conveying pipeline 31 at the outlet of the high-concentration conveyor 2 to control the switching of the main pipeline during the conveying process.

[0019] In this embodiment, there are four storage bins 3, which are divided into two groups to store different raw materials.

[0020] In this embodiment, the storage hopper 3 stores raw material H727 and raw material H829.

[0021] like Figure 1 The diagram illustrates a negative pressure raw material conveying mechanism. The branch circuit includes a first branch 311 and a second branch 312. The diversion valve 32 is a three-way valve, with its inlet end connected to the conveying pipe 31 and its two ends connected to the first branch 311 and the second branch 312, respectively. By installing a precisely controllable diversion valve 32 on the conveying pipe 31, different types of raw materials can be directionally conveyed to designated storage tanks 3 simply by switching the valve.

[0022] In this embodiment, the first branch 311 and the second branch 312 each correspond to a set of storage tanks 3. Diverting valves 32 are installed on the first branch 311 and the second branch 312, splitting each branch into two branches that connect to the corresponding storage tanks 3. The structure is compact, reducing the need for redundant conveying equipment and the corresponding floor space, thus saving on costs.

[0023] In this embodiment, a central control system is also included. The central control system includes an HMI, a central controller, an execution unit, sensors, and a safety module. The operator sets the conveying task through the HMI, the central controller receives the instructions, processes the logic, and installs a preset program to send commands to the execution unit. The execution unit includes a feeder 1, a first valve 21, a second valve 22, and a diversion valve 32. It receives the commands and completes the material conveying. The sensors detect whether the negative pressure in the conveying pipe 31 is normal and whether it is full, and feed back to the central controller. The safety module sets up a fault handling mechanism (such as timeout alarm and emergency stop) to ensure the safety of the material conveying process; it controls the material conveying mechanism to realize the selection of the material conveying path, and has a high degree of intelligence.

[0024] It should be noted that the above description is merely a technical solution of the utility model and not a limitation. Although the present utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of the utility model without departing from the scope of the present utility model, and all such modifications and substitutions should be covered within the scope of the claims of the present utility model.

Claims

1. A negative pressure feedstock delivery mechanism characterized by: include: The feeding machine (1) includes a negative pressure conveyor (11) and a feeding hopper (12). The negative pressure conveyor (11) is connected to the feeding hopper (12) and raw materials are fed from the feeding hopper (12). A high-concentration conveyor (2) is connected to a discharge hopper (12) via a pipe; Storage tank (3), the storage tank (3) is connected to the outlet of high concentration conveyor (2) through conveying pipe (31), there are several storage tanks (3), the conveying pipe (31) is divided into several branches, which are respectively connected to each storage tank (3), and a diversion valve (32) is set on the branch fork to control the direction of raw material conveying so that it is stored in the designated storage tank (3); the branch includes a first branch (311) and a second branch (312), the diversion valve (32) is a three-way structure, the inlet end is connected to the conveying pipe (31), and the two ends are respectively connected to the first branch (311) and the second branch (312); The storage tank (3) is equipped with a separation filter plate and a vacuum suction port, and a vacuum pump is installed on the ground and connected to the vacuum suction port.

2. A negative pressure feedstock delivery mechanism according to claim 1, wherein: The high-concentration conveyor (2) is equipped with a first valve (21) on the pipeline at the inlet.

3. A negative pressure feedstock delivery mechanism according to claim 1, wherein: A second valve (22) is installed on the conveying pipe (31) at the outlet of the high-concentration conveyor (2).

4. The negative pressure raw material conveying mechanism according to claim 1, characterized in that: The storage bins (3) are provided in four groups, which are divided into two groups to store different raw materials respectively.

5. A negative pressure feedstock delivery mechanism according to claim 4, wherein: The storage hopper (3) contains raw material H727 and raw material H829.

6. A negative pressure feedstock delivery mechanism according to claim 1, wherein: The first branch (311) and the second branch (312) correspond to a set of storage tanks (3). The first branch (311) and the second branch (312) are equipped with diversion valves (32) to split the first branch (311) and the second branch (312) into two branches, which are connected to the corresponding storage tanks (3).

7. A negative pressure feedstock delivery mechanism according to claim 1, wherein: It also includes a central control system to control the start and stop of the feeder (1), and to control the first valve (21), the second valve (22), and the diversion valve (32) to select the raw material conveying path.

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