Impurity removing device for automatic coal sampling and preparing equipment

Abstract

The utility model belongs to the technical field of raw coal sampling equipment, and provides a sundry removing device for automatic coal sampling equipment, which comprises a door-shaped bracket, the door-shaped bracket is fixed on a belt rack, an electric air cylinder is arranged above the door-shaped bracket, and an air cylinder push rod of the electric air cylinder extends into the lower part of the door-shaped bracket. A grate comb plate is fixed at one end of the cylinder push rod away from the cylinder; an impurity removing frame is arranged at the front end of the lower part of the grate bar comb plate and is made of square tubes, a plurality of holes are equally formed in the middle of the impurity removing frame, and the number and size of the holes are matched with those of the grate bars; according to the utility model, the automatic sampling and sample preparation equipment runs stably, the impurity blocking condition of the sampling and sample preparation equipment is avoided, and the cost of spare parts and maintenance labor caused by impurity blocking of the sampling and sample preparation equipment is saved; meanwhile, no manual impurity removal action is realized in the sampling and preparation link, and the problem that the sampling result is interfered due to manual participation in the coal sampling and preparation process is avoided.

Description

Technical Field

[0001] This utility model belongs to the technical field of raw coal sampling equipment, and relates to coal material removal, specifically a device for removing impurities from automatic coal sampling equipment. Background Technology

[0002] Coking coal used in coking plants, power coal used in power plants, and pulverized coal used in iron and steel plants all require coal quality analysis and testing before they can be used. To mitigate corruption risks and improve testing efficiency, companies have been actively promoting automated coal sampling, preparation, and analysis equipment in recent years. Automated sampling and preparation equipment is typically installed in the head chute or middle of the conveyor belt. It uses a sampling head that rotates or reciprocates at set times to uniformly collect and store the coal on the belt to a predetermined weight before proceeding with subsequent automated crushing, reduction, weighing, bottling, pneumatic transport, and analysis.

[0003] The coking plant receives coal by train, which is then unloaded using a screw unloader. Common debris in the coal includes wire used to bind the car doors, wooden plugs and foam sealant used to seal the doors, as well as woven bags and straw bags. Other debris, such as wooden planks and metal objects, may also be mixed in during loading. Due to the long unloading line and the large number and diverse workforce, it is very difficult to control and prevent the introduction of debris such as dust masks, gloves, and plastic bags during unloading and conveying coal. Debris brought into the conveyor belt system can have serious consequences. Larger pieces of wood and metal can clog chutes and damage the conveyor belt; woven bags and straw bags can become entangled in downstream equipment, affecting its functionality and accuracy; and if dust masks, gloves, plastic bags, and wooden blocks enter the automatic sampling machine, they can cause blockages, equipment damage, and affect the analysis of that batch of coal samples, resulting in a serious production accident. Automated sampling equipment is a relatively sophisticated system. Given the high risk of corruption associated with manual coal sampling, the company requires a 100% success rate for automated coal sampling and 100% utilization and uploading of coal sample analysis data to the system. Therefore, achieving 100% stable operation of the automated sampling equipment and a 100% success rate for coal sample analysis data are our relentless goals.

[0004] Currently, neither the manufacturers nor the users of automatic sampling equipment have matching automatic impurity removal equipment. Even compared with more advanced and mature sampling and preparation systems, there is the same problem. They mostly use manual impurity removal, but human participation in the coal sample collection and preparation process poses a risk of human interference with the sampling. Utility Model Content

[0005] The purpose of this utility model is to provide a debris removal device for automatic coal sampling equipment, which can block and scrape debris from the coal on the conveyor belt before the automatic sampling head rotates to take samples, so as to prevent debris from entering the automatic sampling equipment and ensure the long-term stable operation of the sampling equipment.

[0006] The technical solution adopted by this utility model to achieve the above objectives is as follows:

[0007] A debris removal device for an automatic coal sampling equipment includes a gantry bracket fixed to a conveyor belt frame. An electric cylinder is installed above the gantry bracket, and the cylinder push rod of the electric cylinder extends below the gantry bracket. A comb plate is fixed to the end of the cylinder push rod away from the cylinder.

[0008] Furthermore, the comb bar is composed of several round steel bars and an arc-shaped square tube. The several round steel bars are arranged in parallel at intervals and one end is fixed to the arc-shaped square tube.

[0009] Furthermore, the curvature of the arc-shaped square tube is the same as that of the coal conveyor belt.

[0010] Furthermore, a cleaning frame is provided at the lower front end of the comb bar. The cleaning frame is made of square tubing and has several holes evenly divided in the middle, the number and size of which match the number and size of the comb bars.

[0011] Furthermore, a short steel pipe is fixedly installed inside the hole; the steel pipe serves as a guide for the expansion and contraction of the grate bars.

[0012] Furthermore, the debris removal device also includes a debris removal device PLC controller, which is linked with the sampling device PLC controller.

[0013] The beneficial effects of this utility model are:

[0014] This device ensures stable operation of the automatic sampling equipment, avoids clogging of the equipment, and saves on spare parts and maintenance labor costs caused by clogging. At the same time, it eliminates the need for manual cleaning during the sampling process, avoiding human intervention that could interfere with the sampling results. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the state of the cleaning action before sampling in this utility model;

[0017] Figure 3 This is a schematic diagram of the electrical interlocking control of this utility model;

[0018] In the diagram: 1. Gate-type support; 2. Belt conveyor frame; 3. Electric cylinder; 4. Cylinder push rod; 5. Grate bar; 5-1. Round steel; 5-2. Arc-shaped square tube; 6. Belt; 7. Cleaning frame; 8. Short steel pipe. Detailed Implementation

[0019] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] A debris removal device for an automated coal sampling equipment is installed in front of the sampling head of the automated coal sampling equipment, such as... Figure 1 and Figure 2 As shown, the system includes a portal frame 1, which is made of channel steel and fixed to the conveyor belt frame 2. A long-stroke electric cylinder 3 is installed above the portal frame 1. The cylinder push rod 4 of the electric cylinder 3 extends below the portal frame 1. A grate comb plate 5 is fixed to the end of the cylinder push rod 4 away from the cylinder. The grate comb plate 5 is composed of several round steel bars 5-1 and an arc-shaped square tube 5-2. The several round steel bars 5-1 are arranged in parallel at intervals. The root of one end of the round steel bars 5-1 is welded and fixed to the arc-shaped square tube 5-2. The arc of the arc-shaped square tube 5-2 is the same as the arc of the coal conveyor belt 6.

[0021] A cleaning frame 7 is provided at the lower front end of the comb plate 5. The cleaning frame 7 is made of square tube. Several holes are equally machined in the middle of the cleaning frame 7. The number, spacing and size of the holes match the number, spacing and size of the round steel 5-1 of the comb plate 5. A short steel pipe 8 is fixedly installed in each hole. The short steel pipe 8 is used as a guide for the extension and retraction of the round steel 5-1 of the comb plate 5. The round steel 5-1 of the comb plate 5 can just pass through the corresponding short steel pipe 8 and shuttle up and down in the short steel pipe 8. The short steel pipe 8 can, on the one hand, keep the round steel 5-1 on the grate bar comb plate 5 free to expand and contract without twisting or getting stuck, and on the other hand, it can also clean the debris on the grate bar comb plate 5. When debris is wrapped or stuck on the grate bar and it is lifted and retracted, it is scraped off by the short steel pipe 8 when it passes through the short steel pipe 8. Although the debris re-enters the coal, the automatic sampling head has already completed the sampling at this time and will not enter the sampling machine system, thus achieving the design purpose.

[0022] The debris removal device also includes a PLC controller for the debris removal device, which is linked with the PLC controller of the sampling equipment. The electrical interlock control diagram is shown below. Figure 3As shown, a manual / automatic switch, a start / stop button, and a control relay are added to the PLC cabinet of the automatic coal sampling equipment. After the PLC controller of the impurity removal device has a normal automatic signal, the PLC module outputs a switch signal at the DO point, the KM relay is activated, the running signal is self-held, the solenoid valve coil is energized, and the impurity removal device starts to run. Taking a belt speed of 2m / s as an example, the impurity removal device is installed 1m away from the sampling head and starts to operate 2s before the sampling head rotates. The grate bar 5 is driven by the cylinder push rod 4 of the electric cylinder 3 to extend and retract in about 2s. After the coal on the belt is cleaned by the grate bar 5, the sampling head can scrape within a length of about 2m to achieve the purpose of removing impurities from the coal sample.

[0023] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for removing impurities in an automatic coal sampling and preparation equipment, characterized in that: The system includes a portal frame bracket fixed to the conveyor belt frame. An electric cylinder is installed above the portal frame bracket, with its cylinder push rod extending below the portal frame bracket. A grate bar comb plate is fixed to the end of the cylinder push rod away from the cylinder. The grate bar comb plate is composed of several round steel bars and an arc-shaped square tube. The round steel bars are arranged in parallel at intervals, with one end fixed to the arc-shaped square tube. The arc of the arc-shaped square tube is the same as the arc of the coal conveyor belt.

2. The impurity removal device for an automatic coal sampling and preparation equipment according to claim 1, characterized in that: The lower front end of the comb plate is provided with a cleaning frame. The cleaning frame is made of square tube and has several holes evenly divided in the middle. The number and size of the holes match the number and size of the comb bars.

3. The impurity removal device for an automatic coal sampling and preparation equipment according to claim 2, characterized in that: A short steel pipe is fixedly installed inside the hole. The steel pipe is used as a guide for the extension and contraction of the grate bars.

4. The impurity removal device for an automatic coal sampling and preparation equipment according to claim 1, characterized in that: The impurity removal device also includes an impurity removal device PLC controller, which is linked with the sampling device PLC controller.

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