An automatic sampling device for granular material of an en masse scraper

Abstract

A kind of automatic sampling device of granular matter of en masse scraper, it includes the conveyor housing of en masse scraper conveyor and the bottom support frame for supporting, sampling notch is opened in the lower of conveyor housing, material pipe body is passed through and set in the middle of bottom support frame, and pneumatic ball valve is installed on bottom support frame, pneumatic ball valve is set on material pipe body, material chute is fixedly connected with the top of material pipe body, and material chute is located at the discharge port of sampling notch, and pneumatic flap valve is arranged between sampling notch and material chute.The utility model has the beneficial effects that: the device realizes the fundamental improvement of sampling representation and data accuracy, the original quality of sample is effectively guaranteed by whole closed structure, and the automatic operation of the sampling device greatly improves the operation safety and environmental protection, meanwhile, the structure of the sampling device is relatively simple, reliable and easy to maintain.

Description

Technical Field

[0001] This utility model relates to an automatic sampling device, specifically an automatic sampling device for particulate matter from a scraper conveyor. Background Technology

[0002] In bulk material conveying systems in industries such as metallurgy, chemicals, and building materials, submerged scraper conveyors are a widely used continuous conveying equipment. Taking limestone production as an example, limestone particles after crushing and screening are usually transported by submerged scraper conveyors to chutes, and then slide down the chutes to the feed inlet of bucket elevators. Finally, the bucket elevators lift the material and transport it to designated silos for storage.

[0003] To effectively monitor and precisely control the quality of lime particles during the production process, quality inspectors need to periodically collect samples during material transportation and conduct subsequent sample preparation, testing, and data analysis. Currently, the conventional sampling point is usually set at the opening on the side wall of the chute connecting the scraper conveyor and the bucket elevator. Whether manual sampling or automatic sampling equipment is used, the operation is carried out at this location.

[0004] However, this method of sampling at the chute has two significant inherent drawbacks: First, the representativeness of the samples taken is severely insufficient. Because the material enters the chute from the discharge port of the scraper conveyor and is in an accelerated sliding state, its distribution across the chute's cross-section is extremely uneven. Therefore, the material obtainable from the openings in the chute's sidewalls originates only from a local edge area of ​​the material flow, making it impossible to completely capture a sample of the material across the entire conveying cross-section. This results in the samples failing to accurately and comprehensively reflect key quality indicators such as particle size distribution and compositional uniformity of the entire batch of material. Consequently, the test data derived from these samples loses its precise guiding significance for the production process.

[0005] Secondly, there are significant safety and environmental hazards. On the one hand, the scraper conveyor and its connected chute are in continuous operation during sampling. Quality inspectors performing manual sampling next to the high-speed falling material flow face not only the risk of material splashing (such as corrosive lime getting into the eyes), but also the mechanical safety hazard of being injured by the impact of the discharged material. Even if automatic sampling equipment is used, its installation, commissioning, and daily maintenance in this location are equally challenging, and personnel safety cannot be fully guaranteed.

[0006] On the other hand, lime particles themselves have strong hygroscopic properties. When sampling in an open chute, the samples are easily exposed to air and become damp and deteriorate, affecting the accuracy of the test results. At the same time, the unavoidable dust release during the sampling process also deteriorates the working environment and does not meet the requirements of clean production.

[0007] Therefore, there is an urgent need in this field for a new sampling device that can fundamentally solve the above problems. It should be able to achieve full-section, closed, and automated sampling on the body of the buried scraper conveyor, thereby ensuring the representativeness and authenticity of the samples and the safety of the operation. Utility Model Content

[0008] The purpose of this utility model is to address the shortcomings and defects in the existing technology by providing an automatic sampling device for particulate matter from a scraper conveyor. This device fundamentally improves the representativeness of the samples and the accuracy of the data. The fully enclosed structure effectively protects the original quality of the samples. Furthermore, the automated operation of this sampling device greatly enhances operational safety and environmental friendliness. At the same time, the structure of this sampling device is relatively simple, highly reliable, and easy to maintain.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: an automatic particle sampling device for a scraper conveyor, comprising a conveyor housing of the scraper conveyor and a bottom support frame for support, wherein a sampling slot is provided at the bottom of the conveyor housing, a material pipe is provided through the middle of the bottom support frame, and a pneumatic ball valve is installed on the bottom support frame, the pneumatic ball valve is provided on the material pipe, a material chute is fixedly connected above the material pipe, and the material chute is located at the outlet of the sampling slot, and a pneumatic slide valve is provided between the sampling slot and the material chute.

[0010] Furthermore, a backflushing valve for material blockage is installed on the material pipe.

[0011] Furthermore, a movable hopper is provided at the outlet of the material pipe.

[0012] Furthermore, the sampling slot has a width of 25mm and a length of 460mm.

[0013] Furthermore, the material pipe body is a DN40 sealed material pipe.

[0014] An automatic particulate matter sampling device for a scraper conveyor includes a PLC control system, wherein the PLC control system is electrically connected to a pneumatic slide gate valve and a pneumatic ball valve.

[0015] After adopting the above technical solution, the beneficial effects of this utility model are as follows: This device has at least the following advantages: 1. A fundamental improvement in sampling representativeness and data accuracy has been achieved: By directly opening the sampling slot on the lower casing of the buried scraper conveyor and using the rapid opening and closing of the pneumatic slide valve to instantly capture the entire cross-section, the device can obtain all the material on the cross-section of the conveyor at once. This solves the core problem of traditional chute sampling, which can only obtain material from the edge and local areas, and ensures that the sample can truly and comprehensively reflect the quality status of the entire batch of materials.

[0016] 2. The fully enclosed structure effectively ensures the original quality of the samples: The device consists of a pneumatic slide valve, a sealed material tube, and a pneumatic ball valve at the end, forming a complete sealing system that isolates the sample from the outside humid air throughout the entire process from interception and temporary storage to collection. This completely solves the problem of moisture absorption and deterioration of materials such as lime particles during the sampling process, and provides a reliable guarantee for the authenticity of subsequent test results.

[0017] 3. Automated operation greatly improves operational safety and environmental friendliness: The PLC control system enables fully automated control, eliminating the need for quality inspectors to perform high-risk manual operations next to the running equipment. This fundamentally eliminates the safety risks associated with traditional methods. At the same time, the fully enclosed sampling process effectively curbs dust dispersion and significantly improves the working environment.

[0018] 4. Simple structure, high reliability and easy maintenance: The core actuator consists of only two standard pneumatic valves, with a simple mechanical structure and all components being mature industrial standard parts. This not only ensures stable and reliable operation but also makes daily maintenance and spare parts replacement very convenient, effectively reducing later maintenance costs. Attached Figure Description

[0019] 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.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a second-angle schematic diagram of the present invention.

[0022] Figure 3 This is a schematic diagram of the structure of the conveyor housing and the sampling slot in this utility model.

[0023] Figure 4 This is a schematic diagram of the structure of the material pipe, pneumatic ball valve, material chute, and backflushing valve for material blockage in this utility model.

[0024] Explanation of reference numerals in the attached drawings: 1. Conveyor casing; 2. Pneumatic slide gate valve; 3. Material pipe; 4. Pneumatic ball valve; 5. Bottom support frame; 6. Feed hopper; 7. Sampling slot; 8. Material chute; 9. Blockage backflush valve. Detailed Implementation

[0025] See Figures 1-4 As shown, the technical solution adopted in this specific embodiment is as follows: it includes a conveyor housing 1 of a buried scraper conveyor and a bottom support frame 5 for support. A sampling slot 7 is provided at the bottom of the conveyor housing 1. A material pipe 3 is provided through the middle of the bottom support frame 5, and a pneumatic ball valve 4 is installed on the bottom support frame 5. The pneumatic ball valve 4 is provided on the material pipe 3. A material chute 8 is fixedly connected to the top of the material pipe 3, and the material chute 8 is located at the outlet of the sampling slot 7. A pneumatic slide valve 2 is provided between the sampling slot 7 and the material chute 8.

[0026] More specifically, a backflush valve 9 is installed on the material pipe 3. If a blockage occurs during the sampling process, the operator can open the backflush valve 9 and backflush the material pipe 3 through the backflush pipe to clear the blockage.

[0027] More specifically, a movable hopper 6 is provided at the discharge port of the material pipe 3. The material will fall into the hopper 6, and the staff can quickly complete the material handling and transportation simply by using the hopper 6.

[0028] More specifically, the sampling slot 7 has a width of 25mm and a length of 460mm. The sampling slot 7 can quickly form a material channel when sampling is required, facilitating the entry of material into its material tube 3.

[0029] More specifically, material pipe 3 is a DN40 sealed material pipe. Material pipe 3 can prevent the material from absorbing moisture and deteriorating.

[0030] An automatic particulate matter sampling device for a scraper conveyor includes a PLC control system, which is electrically connected to a pneumatic slide gate valve 2 and a pneumatic ball valve 4. The PLC control system controls the pneumatic slide gate valve 2 and the pneumatic ball valve 4, thereby achieving automated control of the equipment.

[0031] The working principle of this invention is as follows: This device achieves fully automatic control through a PLC system. During the continuous conveying of lime granules by the scraper conveyor, the PLC automatically initiates a sampling cycle at preset time intervals. At the start of the cycle, the PLC outputs a signal to drive the pneumatic slide valve 2 to open rapidly. At this time, the material flowing inside the scraper conveyor falls completely into the sealed material pipe 3 below through the opened sampling slot 7 under the action of gravity, thus completing a full-section sampling. The pneumatic slide valve 2 pauses briefly to ensure that the intercepted sample falls completely into the material pipe 3. Subsequently, the PLC controls the pneumatic slide gate valve 2 to close quickly, resetting to a sealed state, ready for the next action. This completes a single sampling action. Through precise calculation, for example, sampling 300-350g per action, a total sample volume of 7-8kg can be obtained within 12 hours after 24 actions. The system can meet the total sample volume requirements for regular sampling, such as twice a day. When samples need to be collected, the sampling personnel only need to place the sampling hopper 6 below the outlet of the material guide tube 3 and trigger the signal by pressing the button. The PLC then controls the pneumatic ball valve 4 at the end of the material guide tube 3 to open, and all the samples temporarily stored in the material guide tube 3 fall into the sampling hopper 6. At this time, the personnel can safely and conveniently retrieve the highly representative sealed sample.

[0032] The above is only used to illustrate the technical solution of this utility model and not to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. An apparatus for automatic sampling of granular material from an en masse scraper conveyor, comprising a conveyor housing (1) of an en masse scraper conveyor and a bottom support frame (5) for support, characterized in that: A sampling slot (7) is provided at the bottom of the conveyor housing (1). A material pipe (3) is provided through the middle of the bottom support frame (5). A pneumatic ball valve (4) is installed on the bottom support frame (5). The pneumatic ball valve (4) is located on the material pipe (3). A material chute (8) is fixedly connected above the material pipe (3). The material chute (8) is located at the outlet of the sampling slot (7). A pneumatic slide valve (2) is provided between the sampling slot (7) and the material chute (8).

2. The automatic particulate matter sampling device for a scraper conveyor according to claim 1, characterized in that: A backflush valve (9) is installed on the material pipe (3).

3. The automatic particulate matter sampling device for a scraper conveyor according to claim 1, characterized in that: The material pipe (3) is provided with a movable feeding hopper (6) at the discharge port.

4. The automatic particulate matter sampling device for a scraper conveyor according to claim 1, characterized in that: The sampling slot (7) has a width of 25mm and a length of 460mm.

5. The automatic particulate matter sampling device for a scraper conveyor according to claim 1, characterized in that: The material pipe body (3) is a DN40 sealed material pipe.

6. The automatic particulate matter sampling device for a scraper conveyor according to claim 1, characterized in that: It also includes a PLC control system, which is electrically connected to the pneumatic slide gate valve (2) and the pneumatic ball valve (4).

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