Impurity cleaning device for pneumatic material conveying system

Abstract

The present invention discloses an impurity cleaning device for a pneumatic material conveying system, which includes a moving body that can be pneumatically conveyed within a pneumatic conveying pipeline. At least one end of the moving body is open to form a shovel barrel part, so that when the moving body is conveying, impurities within the pneumatic conveying pipeline can be shoveled into the moving body through the shovel barrel part for collection. The present invention has the advantages of simple and compact structure, low manufacturing cost, easy operation, capable of timely collecting foreign matters within the pneumatic conveying pipeline, keeping the pneumatic conveying pipeline clean, and being easy to maintain and repair.

Description

Technical Field

[0001] The present invention mainly relates to the field of sampling, sample preparation and analysis equipment for material samples, and particularly relates to an impurity cleaning device for a pneumatic conveying system of materials. Background Art

[0002] For the sampling, sample preparation and analysis of material (such as ore, coal) samples, there are mandatory standards in each country, and the sampling, sample preparation and analysis work of samples must be carried out in accordance with the standards. The criterion for the sampling, sample preparation and analysis process of samples is to gradually reduce the particle size of the collected samples and also gradually reduce the mass under the premise of not destroying the representativeness of the samples, until the particle size and mass (weight) accuracy requirements of the samples for laboratory analysis are met, and then relevant analysis is carried out on the samples that meet the requirements.

[0003] Taking the sampling, sample preparation and analysis of coal samples as an example, it is actually a process of sampling analysis. The purpose of coal sampling and sample preparation is to obtain a test coal sample whose test results can represent the whole batch of sampled coal. Coal is an inhomogeneous substance (particle size, mass characteristic distribution, etc.), and the mass of the sampled coal is generally relatively large (ranging from dozens of tons to tens of thousands of tons). The process of taking a representative part of the coal from the sampled coal is called "sampling", and currently there are various methods such as mechanical sampling, manual sampling, and semi-mechanical sampling. After sampling the samples according to the standards, the next process is "sample preparation". The sample preparation process generally includes processes such as crushing, mixing, reduction, and drying. After the samples are prepared, the next step is to carry out "analysis" of the samples. Whether it is "sampling", "sample preparation" or "analysis", there should be no loss of samples and no physical or chemical changes to the samples during this process, otherwise it will affect the final test results.

[0004] In the sampling, sample preparation and analysis of material (such as ore, coal) samples, it is necessary to transfer the sampled and prepared samples from the work station (laboratory) of this link to the work station (laboratory) of the next link for the next stage of work. In the process of sample transfer and transportation, the control of sample mass accuracy, transfer and transportation speed, and efficiency are particularly important. In the existing sample transfer and transportation work, some use the method of pneumatic pipeline transportation, but there are the following technical problems:

[0005] (1) Affect the transportation efficiency. When there are foreign objects (residues) in the transmission pipeline or the packaged material to be transported leaks into the transmission pipeline after being damaged, these substances in the transmission pipeline will affect the normal operation of the material to be transported, seriously affecting the transportation efficiency of the samples.

[0006] (2) Difficult to clean and maintain. Since the pneumatic transmission pipeline is very long and the pipeline is very small (people cannot enter), once foreign objects (residues) appear in the transmission pipeline, it is very difficult to clean. If not cleaned in time, it may cause the material to be transported to be stuck in the transmission pipeline. Once blocked, the pipeline cleaning and dredging work will be more difficult at that time, and the maintenance cost is extremely high.

[0007] (3) Serious pipeline wear. Although it is possible that the material to be transported will push these foreign objects (residues) forward, due to the long transmission pipeline, these foreign objects (residues) will increase the friction between the material to be transported and the inner wall of the transmission pipeline during the transportation process, resulting in serious wear of the transmission pipeline, shortening the service life of the transmission pipeline, and increasing the use cost.

[0008] (4) Some existing technologies adopt a structure in which a discharge port is opened below the transmission pipeline, and a sealed collection bin is arranged below the discharge port. The sundries in the transmission pipeline are pushed by the high-speed running sample bottle to the discharge port and collected in the collection bin. After the bin is full, it is cleaned by manually opening the bin or adding an electric bin door. There are the following disadvantages: First, if the method of manually opening the bin and discarding the materials is adopted, due to the requirements of the pipeline transmission layout position, there is a risk of working at height and it is somewhat dangerous. Second, manual handling needs to be carried out regularly, consuming a high labor cost and taking a long cleaning time. Third, if the electric bin opening method is adopted, the power cable for driving the bin opening needs to be arranged along the entire pipeline, with a large amount of work. At the same time, the electric bin opening structure is complex and the equipment cost is high. Summary of the Invention

[0009] The technical problem to be solved by the present invention is: aiming at the problems existing in the prior art, to provide an impurity cleaning device for a material pneumatic transmission system, which has a simple and compact structure, low manufacturing cost, easy to operate, can timely collect foreign objects in the pneumatic transmission pipeline, keep the pneumatic transmission pipeline clean, and is easy to maintain and repair.

[0010] To solve the above technical problems, the present invention adopts the following technical solutions:

[0011] An impurity cleaning device for a material pneumatic transmission system includes a moving body that can be pneumatically transmitted in the pneumatic transmission pipeline. At least one end of the moving body is opened to form a shovel barrel part, so that when the moving body is transmitted, impurities in the pneumatic transmission pipeline can be shoveled into the moving body through the shovel barrel part for collection.

[0012] As a further improvement of the present invention, a storage bin is arranged behind the shovel barrel part of the moving body. The opening diameter of the shovel barrel part gradually decreases from outside to inside in a conical bell mouth shape. The outer diameter of the rear port of the shovel barrel part inserted into the storage bin is smaller than the inner diameter of the storage bin, so that the impurities entering the storage bin are not easy to flow back outward from the shovel barrel part.

[0013] As a further improvement of the present invention, the shovel barrel part is detachably connected to the storage bin for cleaning the impurities in the storage bin after removing the shovel barrel part.

[0014] As a further improvement of the present invention, the shovel barrel part is made of a soft material.

[0015] As a further improvement of the present invention, the outer diameter of the front port of the shovel barrel part facing outward is not less than the inner diameter of the pneumatic transmission pipeline, so that the front port of the shovel barrel part can be completely attached to the inner wall of the pneumatic transmission pipeline after being squeezed.

[0016] As a further improvement of the present invention, a circular inner-notch arc part is provided on the outer circumferential surface of the front port of the shovel barrel part facing outward to increase the area of attachment between the shovel barrel part and the inner wall of the pneumatic transmission pipeline, and to enable the shovel barrel part to smoothly pass through the connection ridge on the inner wall of the pneumatic transmission pipeline during transmission.

[0017] As a further improvement of the present invention, the outer wall diameter of the storage bin is smaller than the inner wall diameter of the pneumatic transmission pipeline, and more than one circle of protruding sealing strips are provided on the outer wall surface of the storage bin.

[0018] Compared with the prior art, the advantages of the present invention are as follows:

[0019] First, for the impurity cleaning device of the present invention for the pneumatic material transmission system, the shovel barrel part can timely shovel the impurities in the pneumatic transmission pipeline into the moving body, so that the pneumatic transmission pipeline can be kept clean, which will not affect the normal transmission of the sample and ensure the transmission efficiency of the sample.

[0020] Second, for the impurity cleaning device of the present invention for the pneumatic material transmission system, by designing the cooperating moving body and shovel barrel part, the overall structure is simple and compact, the manufacturing cost is low, and there is no need to set other complex in-pipeline cleaning equipment to achieve the cleaning of the pneumatic transmission pipeline. The pneumatic transmission pipeline is not prone to blockage, and the maintenance cost is low.

[0021] Third, for the impurity cleaning device of the present invention for the pneumatic material transmission system, the operation method is simple, fast, low-cost and effective. Just like normal pneumatic transmission operation, it completely subverts the existing cleaning method of pneumatic material transmission, eliminates the risk of high-altitude operation, reduces the cleaning time, and there is no need to set a bin body for the pipeline opening, ensuring the airtightness of the pipeline. There is no need to set a driving power cable, the engineering quantity is small, and the equipment cost is greatly reduced.

[0022] Fourth, for the impurity cleaning device of the present invention for the pneumatic material transmission system, since it is similar to normal pneumatic transmission objects, it is possible to simultaneously adopt the method of cleaning while transmitting materials without pausing the pneumatic transmission operation, improving the work efficiency.

[0023] Fifth, the impurity cleaning device for the pneumatic material transmission system of the present invention has a conical flared shape, so that no matter how the moving body rotates circumferentially in the pipe during pneumatic transmission, the shoveling cylinder part can cooperate with the pneumatic pipeline to carry out cleaning operations, making the equipment highly stable. Second, due to the high speed of pneumatic transmission and the possible existence of bends and interfaces between two pipelines, the collected impurities may flow back into the pipeline again. By setting a storage bin with a special structure and matching, an anti-edge is formed between the shoveling cylinder part and the storage bin, which makes it difficult for the impurities entering the storage bin to flow outwards from the shoveling cylinder part, and the collection effect and cleaning effect are excellent. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic structural principle diagram of the impurity cleaning device of the present invention in the pneumatic transmission pipeline.

[0025] Figure 2 It is a schematic structural principle diagram of the impurity cleaning device of the present invention when applied to the pneumatic transmission system.

[0026] Figure 3 It is a schematic structural principle diagram of the impurity cleaning device in the present invention.

[0027] Figure 4 Is Figure 3 The enlarged schematic structural principle diagram at position B in

[0028] LEGEND:

[0029] 1. Pneumatic transmission pipeline; 2. Moving body; 21. Shoveling cylinder part; 211. Inner missing arc part; 22. Storage bin. DETAILED DESCRIPTION OF THE INVENTION

[0030] The present invention will be further described in detail below with reference to specific embodiments and the accompanying drawings.

[0031] As Figures 1 to 4 shown, the present invention provides an impurity cleaning device for a pneumatic material transmission system, including a moving body 2 that can be pneumatically transmitted in a pneumatic transmission pipeline 1, and the length of the moving body 2 is not longer than 2 meters. At least one end of the moving body 2 is open to form a shoveling cylinder part 21, so that when the moving body 2 is transmitting, the impurities in the pneumatic transmission pipeline 1 can be shoveled into the moving body 2 through the shoveling cylinder part 21 for collection. The specific implementation principle is as follows:

[0032] When the operator deems it necessary to clean, the impurity cleaning device can be directly placed into the pneumatic transmission pipeline 1 at any time, and then the pneumatic transmission system is operated normally, enabling the moving body 2 to be pneumatically transmitted within the pneumatic transmission pipeline 1. During the transmission process, the shovel barrel part 21 at the front end of the moving body 2 in the transmission direction will shovel the impurities in the pneumatic transmission pipeline 1 into the moving body 2, and collect and store them in the moving body 2, making the pipeline clean without impurities and foreign objects. After the transmission reaches the designated position, the moving body 2 is taken out and the impurities are poured out. Through the above special scientific design, the following technical advantages are achieved:

[0033] First, the shovel barrel part 21 can timely shovel the impurities in the pneumatic transmission pipeline 1 into the moving body 2, keeping the pneumatic transmission pipeline 2 clean, without affecting the normal transmission of the sample, and ensuring the conveying efficiency of the sample. Second, by designing the cooperating moving body 2 and shovel barrel part 21, the overall structure is simple and compact, with low manufacturing cost. Without the need to set up other complex in-pipeline cleaning equipment, the cleaning of the pneumatic transmission pipeline 1 can be achieved, and the pneumatic transmission pipeline 1 is not prone to blockage, with low maintenance cost. Third, the operation method is simple, fast, low-cost, and effective. Just like normal pneumatic transmission operations, it completely subverts the existing cleaning methods of pneumatic material transmission, eliminates the risk of working at heights, reduces the cleaning time, and does not require a bin body to be set at the pipeline opening, ensuring the airtightness of the pipeline. Without the need to set up a driving power cable, the engineering volume is small, greatly reducing the equipment cost. Fourth, since it is similar to normal pneumatic transmission materials, it is possible to adopt the method of cleaning while transmitting materials at the same time, without pausing the pneumatic transmission operation, improving the work efficiency.

[0034] Furthermore, in a preferred embodiment, a storage bin 22 is provided behind the shovel barrel part 21 of the moving body 2. The opening diameter of the shovel barrel part 21 gradually decreases from outside to inside, presenting a conical bell mouth shape. The outer diameter at the rear port of the shovel barrel part 21 inserted into the storage bin 22 is smaller than the inner diameter of the storage bin 22, so as to prevent the impurities entering the storage bin 22 from flowing back outwards through the shovel barrel part 21. First, the conical bell mouth shape enables the shovel barrel part 21 to form a cooperation with the pneumatic pipeline for cleaning operations regardless of how the moving body 2 rotates circumferentially in the pipe during pneumatic transmission, making the equipment highly stable. Second, due to the high speed of pneumatic transmission and the possible existence of curves and pipe joints, the collected impurities may flow back into the pipeline. By setting up a specially structured and cooperating storage bin 22, an anti-edge (such as Figure 3 shown as A in the figure) is formed between the shovel barrel part 21 and the storage bin 22, which makes it difficult for the impurities entering the storage bin 22 to flow back outwards through the shovel barrel part 21, and the collection effect and cleaning effect are excellent.

[0035] Further, in a preferred embodiment, the shovel barrel part 21 is detachably connected to the storage bin 22 for cleaning the impurities in the storage bin 22 after removing the shovel barrel part 21. The detachable connection method can be a threaded fixed connection or a pin fixed connection, which not only ensures the reliability of the connection but also makes the cleaning convenient and facilitates the next operation.

[0036] Further, in a preferred embodiment, the shovel barrel part 21 is made of a soft material, such as rubber, silica gel, etc.

[0037] Further, in a preferred embodiment, the outer diameter of the front port of the shovel barrel part 21 facing outward is not less than the inner diameter of the pneumatic transmission pipeline 1, so that the front port of the shovel barrel part 21 can be completely attached to the inner wall of the pneumatic transmission pipeline 1 after being squeezed. This makes the front port of the shovel barrel part 21 fit tightly with the inner wall of the pneumatic transmission pipeline 1, thereby making the shoveled impurities cleaner and more comprehensive, and the cleaning effect is better. Moreover, it can make the shovel barrel part 21 itself and the pipeline support each other, without the risk of rolling or jamming, ensuring high-speed pneumatic transmission.

[0038] Further, in a preferred embodiment, a circular inner-notch arc part 211 (shown as D in the figure) is provided on the outer circumferential surface of the front port of the shovel barrel part 21 facing outward to increase the fitting area between the shovel barrel part 21 and the inner wall of the pneumatic transmission pipeline 1 and enable the shovel barrel part 21 to smoothly pass through the connecting ridge on the inner wall of the pneumatic transmission pipeline 1 during transmission. This not only increases the fitting area and further ensures the cleaning effect, but also when the shovel barrel part 21 passes through the connecting ridge on the inner wall of the pneumatic transmission pipeline 1 (there may be a protruding connecting ridge where two pipelines are connected), the inner-notch arc part 211 can deform, enabling the shovel barrel part 21 to pass through the connecting ridge smoothly and quickly, with a better transmission effect and no risk of jamming.

[0039] Further, in a preferred embodiment, the outer wall diameter of the storage bin 22 is smaller than the inner wall diameter of the pneumatic transmission pipeline 1, and more than one protruding sealing strip is provided on the outer wall surface of the storage bin 22. The outer wall diameter of the rigid storage bin 22 being smaller than the inner wall diameter of the pneumatic transmission pipeline 1 has two advantages. First, it will not damage the inner wall surface of the pipeline, improving the service life of the pipeline. Second, it makes the transmission smoother, without the risk of getting stuck at the pipeline turning point, with high safety. More than one protruding sealing strip (shown as C in the figure) is provided on the outer wall surface of the storage bin 22, which also makes the airtightness better, not easily leaking air, resulting in a better transmission effect and faster transmission.

[0040] The above is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the concept of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, several improvements and refinements made without departing from the principle of the present invention should be regarded as within the protection scope of the present invention.

Claims

1. An impurity cleaning device for a pneumatic material conveying system, characterized in that, it includes a moving body (2) that can be pneumatically conveyed in a pneumatic conveying pipeline (1). At least one end of the moving body (2) is open to form a shoveling barrel part (21) for shoveling impurities in the pneumatic conveying pipeline (1) into the moving body (2) for collection when the moving body (2) is conveyed; a storage bin (22) is provided behind the shoveling barrel part (21) of the moving body (2). The opening diameter of the shoveling barrel part (21) gradually decreases from outside to inside, presenting a conical bell mouth shape. The outer diameter of the rear port of the shoveling barrel part (21) inserted into the storage bin (22) is smaller than the inner diameter of the storage bin (22) for forming a reverse edge between the shoveling barrel part 21 and the storage bin (22) so that the impurities entering the storage bin (22) are not easily reversed outwards from the shoveling barrel part (21); the outer wall diameter of the storage bin (22) is smaller than the inner wall diameter of the pneumatic conveying pipeline (1), and more than one circle of protruding sealing strips are provided on the outer wall surface of the storage bin (22); the shoveling barrel part (21) is made of a soft material; an inner concave arc part (211) is provided on the outer circumferential surface of the front port of the shoveling barrel part (21) facing outwards to increase the area of contact between the shoveling barrel part (21) and the inner wall of the pneumatic conveying pipeline (1) and enable the shoveling barrel part (21) to smoothly pass through the connection ridge on the inner wall of the pneumatic conveying pipeline (1) during transmission.

2. The impurity cleaning device for a pneumatic material conveying system according to claim 1, characterized in that, the shoveling barrel part (21) is detachably connected to the storage bin (22) for cleaning the impurities in the storage bin (22) after removing the shoveling barrel part (21).

3. The impurity cleaning device for a pneumatic material conveying system according to claim 1, characterized in that, the outer diameter of the front port of the shoveling barrel part (21) facing outwards is not less than the inner diameter of the pneumatic conveying pipeline (1) so that the front port of the shoveling barrel part (21) is completely in contact with the inner wall of the pneumatic conveying pipeline (1) after being squeezed.

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